### Bug Summary

File: | builds/wireshark/wireshark/epan/dissectors/packet-ssh.c
Warning: | line 2712, column 17 Value of 'errno' was not checked and may be overwritten by function 'ferror'

### Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name packet-ssh.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -ffloat16-excess-precision=fast -fbfloat16-excess-precision=fast -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/builds/wireshark/wireshark/build -fcoverage-compilation-dir=/builds/wireshark/wireshark/build -resource-dir /usr/lib/llvm-21/lib/clang/21 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /builds/wireshark/wireshark/epan/dissectors -isystem /builds/wireshark/wireshark/build/epan/dissectors -isystem /usr/include/mit-krb5 -isystem /usr/include/libxml2 -isystem /builds/wireshark/wireshark/epan -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D WS_BUILD_DLL -D WS_DEBUG -D WS_DEBUG_UTF_8 -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -D _GLIBCXX_ASSERTIONS -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -Wno-format-nonliteral -std=gnu11 -ferror-limit 19 -fvisibility=hidden -fwrapv -fwrapv-pointer -fstrict-flex-arrays=3 -stack-protector 2 -fstack-clash-protection -fcf-protection=full -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fexceptions -fcolor-diagnostics -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /builds/wireshark/wireshark/sbout/2026-03-28-100342-3641-1 -x c /builds/wireshark/wireshark/epan/dissectors/packet-ssh.c

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1 | /* packet-ssh.c
2 | * Routines for ssh packet dissection
3 | *
4 | * Huagang XIE <huagang@intruvert.com>
5 | * Kees Cook <kees@outflux.net>
6 | *
7 | * Wireshark - Network traffic analyzer
8 | * By Gerald Combs <gerald@wireshark.org>
9 | * Copyright 1998 Gerald Combs
10 | *
11 | * Copied from packet-mysql.c
12 | *
13 | * SPDX-License-Identifier: GPL-2.0-or-later
14 | *
15 | *
16 | * Note: support SSH v1 and v2 now.
17 | *
18 | */
19 |
20 | /* SSH version 2 is defined in:
21 | *
22 | * RFC 4250: The Secure Shell (SSH) Protocol Assigned Numbers
23 | * RFC 4251: The Secure Shell (SSH) Protocol Architecture
24 | * RFC 4252: The Secure Shell (SSH) Authentication Protocol
25 | * RFC 4253: The Secure Shell (SSH) Transport Layer Protocol
26 | * RFC 4254: The Secure Shell (SSH) Connection Protocol
27 | *
28 | * SSH versions under 2 were never officially standardized.
29 | *
30 | * Diffie-Hellman Group Exchange is defined in:
31 | *
32 | * RFC 4419: Diffie-Hellman Group Exchange for
33 | * the Secure Shell (SSH) Transport Layer Protocol
34 | */
35 |
36 | /* "SSH" prefixes are for version 2, whereas "SSH1" is for version 1 */
37 |
38 | #include "config.h"
39 | #define WS_LOG_DOMAIN"packet-ssh" "packet-ssh"
40 | /* Start with WIRESHARK_LOG_DOMAINS=packet-ssh and WIRESHARK_LOG_LEVEL=debug to see messages. */
41 |
42 | // Define this to get hex dumps more similar to what you get in openssh. If not defined, dumps look more like what you get with other dissectors.
43 | #define OPENSSH_STYLE
44 |
45 | #include <errno(*__errno_location ()).h>
46 |
47 | #include <epan/packet.h>
48 | #include <epan/exceptions.h>
49 | #include <epan/prefs.h>
50 | #include <epan/expert.h>
51 | #include <epan/proto_data.h>
52 | #include <epan/tfs.h>
53 | #include <epan/unit_strings.h>
54 | #include <wsutil/strtoi.h>
55 | #include <wsutil/to_str.h>
56 | #include <wsutil/file_util.h>
57 | #include <wsutil/filesystem.h>
58 | #include <wsutil/wsgcrypt.h>
59 | #include <wsutil/curve25519.h>
60 | #include <wsutil/pint.h>
61 | #include <wsutil/str_util.h>
62 | #include <wsutil/wslog.h>
63 | #include <epan/secrets.h>
64 | #include <wiretap/secrets-types.h>
65 |
66 | #if defined(HAVE_LIBGNUTLS1)
67 | #include <gnutls/abstract.h>
68 | #endif
69 |
70 | #include "packet-tcp.h"
71 | #include "packet-sctp.h"
72 |
73 | void proto_register_ssh(void);
74 | void proto_reg_handoff_ssh(void);
75 |
76 | /* SSH Version 1 definition , from openssh ssh1.h */
77 | #define SSH1_MSG_NONE0 0 /* no message */
78 | #define SSH1_MSG_DISCONNECT1 1 /* cause (string) */
79 | #define SSH1_SMSG_PUBLIC_KEY2 2 /* ck,msk,srvk,hostk */
80 | #define SSH1_CMSG_SESSION_KEY3 3 /* key (BIGNUM) */
81 | #define SSH1_CMSG_USER4 4 /* user (string) */
82 |
83 |
84 | #define SSH_VERSION_UNKNOWN0 0
85 | #define SSH_VERSION_11 1
86 | #define SSH_VERSION_22 2
87 |
88 | /* proto data */
89 |
90 | typedef struct {
91 | uint8_t *data;
92 | unsigned length;
93 | } ssh_bignum;
94 |
95 | #define SSH_KEX_CURVE255190x00010000 0x00010000
96 | #define SSH_KEX_DH_GEX0x00020000 0x00020000
97 | #define SSH_KEX_DH_GROUP10x00030001 0x00030001
98 | #define SSH_KEX_DH_GROUP140x00030014 0x00030014
99 | #define SSH_KEX_DH_GROUP160x00030016 0x00030016
100 | #define SSH_KEX_DH_GROUP180x00030018 0x00030018
101 | #define SSH_KEX_SNTRUP761X255190x00040000 0x00040000
102 | #define SSH_KEX_MLKEM768X255190x00050000 0x00050000
103 |
104 | #define SSH_KEX_HASH_SHA11 1
105 | #define SSH_KEX_HASH_SHA2562 2
106 | #define SSH_KEX_HASH_SHA5124 4
107 |
108 | #define DIGEST_MAX_SIZE48 48
109 |
110 | /* The maximum SSH packet_length accepted. If the packet_length field after
111 | * attempted decryption is larger than this, the packet will be assumed to
112 | * have failed decryption (possibly due to being continuation data).
113 | * (This could be made a preference.)
114 | */
115 | #define SSH_MAX_PACKET_LEN32768 32768
116 |
117 | typedef struct _ssh_message_info_t {
118 | uint32_t sequence_number;
119 | unsigned char *plain_data; /**< Decrypted data. */
120 | unsigned data_len; /**< Length of decrypted data. */
121 | int id; /**< Identifies the exact message within a frame
122 | (there can be multiple records in a frame). */
123 | uint32_t byte_seq;
124 | uint32_t next_byte_seq;
125 | struct _ssh_message_info_t* next;
126 | uint8_t calc_mac[DIGEST_MAX_SIZE48];
127 | } ssh_message_info_t;
128 |
129 | typedef struct {
130 | bool_Bool from_server;
131 | ssh_message_info_t * messages;
132 | } ssh_packet_info_t;
133 |
134 | typedef struct _ssh_channel_info_t {
135 | uint32_t byte_seq;
136 | uint16_t flags;
137 | wmem_tree_t *multisegment_pdus;
138 | dissector_handle_t handle;
139 | } ssh_channel_info_t;
140 |
141 | struct ssh_peer_data {
142 | unsigned counter;
143 |
144 | uint32_t frame_version_start;
145 | uint32_t frame_version_end;
146 |
147 | uint32_t frame_key_start;
148 | uint32_t frame_key_end;
149 | int frame_key_end_offset;
150 |
151 | char* kex_proposal;
152 |
153 | /* For all subsequent proposals,
154 | [0] is client-to-server and [1] is server-to-client. */
155 | #define CLIENT_TO_SERVER_PROPOSAL0 0
156 | #define SERVER_TO_CLIENT_PROPOSAL1 1
157 |
158 | char* mac_proposals[2];
159 | char* mac;
160 | int mac_length;
161 |
162 | char* enc_proposals[2];
163 | char* enc;
164 |
165 | char* comp_proposals[2];
166 | char* comp;
167 |
168 | int length_is_plaintext;
169 |
170 | // see libgcrypt source, gcrypt.h:gcry_cipher_algos
171 | unsigned cipher_id;
172 | unsigned mac_id;
173 | // chacha20 needs two cipher handles
174 | gcry_cipher_hd_t cipher, cipher_2;
175 | unsigned sequence_number;
176 | ssh_bignum *bn_cookie;
177 | uint8_t iv[12];
178 | uint8_t hmac_iv[DIGEST_MAX_SIZE48];
179 | unsigned hmac_iv_len;
180 |
181 | unsigned int rekey_trigger_frame; // for storing new KEXINIT frame value when REKEY
182 | bool_Bool rekey_pending; // trace REKEY
183 | uint8_t plain0[16];
184 | bool_Bool plain0_valid;
185 |
186 | wmem_map_t *channel_info; /**< Map of sender channel numbers to recipient numbers. */
187 | wmem_map_t *channel_handles; /**< Map of recipient channel numbers to subdissector handles. */
188 | struct ssh_flow_data * global_data;
189 | };
190 |
191 | struct ssh_flow_data {
192 | unsigned version;
193 |
194 | /* The address/port of the server */
195 | address srv_addr;
196 | unsigned srv_port;
197 |
198 | char* kex;
199 | int (*kex_specific_dissector)(uint8_t msg_code, tvbuff_t *tvb,
200 | packet_info *pinfo, int offset, proto_tree *tree,
201 | struct ssh_flow_data *global_data);
202 |
203 | /* [0] is client's, [1] is server's */
204 | #define CLIENT_PEER_DATA0 0
205 | #define SERVER_PEER_DATA1 1
206 | struct ssh_peer_data peer_data[2];
207 |
208 | const uint8_t *session_id;
209 | unsigned session_id_length;
210 | ssh_bignum *kex_e;
211 | ssh_bignum *kex_f;
212 | ssh_bignum *kex_gex_p; // Group modulo
213 | ssh_bignum *kex_gex_g; // Group generator
214 | ssh_bignum *secret;
215 | wmem_array_t *kex_client_version;
216 | wmem_array_t *kex_server_version;
217 | wmem_array_t *kex_client_key_exchange_init;
218 | wmem_array_t *kex_server_key_exchange_init;
219 | wmem_array_t *kex_server_host_key_blob;
220 | wmem_array_t *kex_gex_bits_min;
221 | wmem_array_t *kex_gex_bits_req;
222 | wmem_array_t *kex_gex_bits_max;
223 | wmem_array_t *kex_shared_secret;
224 | bool_Bool do_decrypt;
225 | bool_Bool ext_ping_openssh_offered;
226 | bool_Bool ext_kex_strict;
227 | ssh_bignum new_keys[6];
228 | uint8_t *pqkem_ciphertext;
229 | uint32_t pqkem_ciphertext_len;
230 | uint8_t *curve25519_pub;
231 | uint32_t curve25519_pub_len;
232 | // storing PQ dissected keys
233 | uint8_t *kex_e_pq; // binary material => no bignum (not traditional DH integer / not math ready)
234 | uint8_t *kex_f_pq; // binary material => no bignum (not traditional DH integer / not math ready)
235 | uint32_t kex_e_pq_len;
236 | uint32_t kex_f_pq_len;
237 | };
238 |
239 | typedef struct {
240 | char *type; // "PRIVATE_KEY" or "SHARED_SECRET"
241 | ssh_bignum *key_material; // Either private key or shared secret
242 | } ssh_key_map_entry_t;
243 |
244 | static GHashTable * ssh_master_key_map;
245 |
246 | static int proto_ssh;
247 |
248 | /* Version exchange */
249 | static int hf_ssh_protocol;
250 |
251 | /* Framing */
252 | static int hf_ssh_packet_length;
253 | static int hf_ssh_packet_length_encrypted;
254 | static int hf_ssh_padding_length;
255 | static int hf_ssh_payload;
256 | static int hf_ssh_encrypted_packet;
257 | static int hf_ssh_padding_string;
258 | static int hf_ssh_mac_string;
259 | static int hf_ssh_mac_status;
260 | static int hf_ssh_seq_num;
261 | static int hf_ssh_direction;
262 |
263 | /* Message codes */
264 | static int hf_ssh_msg_code;
265 | static int hf_ssh2_msg_code;
266 | static int hf_ssh2_kex_dh_msg_code;
267 | static int hf_ssh2_kex_dh_gex_msg_code;
268 | static int hf_ssh2_kex_ecdh_msg_code;
269 | static int hf_ssh2_kex_hybrid_msg_code;
270 | static int hf_ssh2_ext_ping_msg_code;
271 |
272 | /* Algorithm negotiation */
273 | static int hf_ssh_cookie;
274 | static int hf_ssh_kex_algorithms;
275 | static int hf_ssh_server_host_key_algorithms;
276 | static int hf_ssh_encryption_algorithms_client_to_server;
277 | static int hf_ssh_encryption_algorithms_server_to_client;
278 | static int hf_ssh_mac_algorithms_client_to_server;
279 | static int hf_ssh_mac_algorithms_server_to_client;
280 | static int hf_ssh_compression_algorithms_client_to_server;
281 | static int hf_ssh_compression_algorithms_server_to_client;
282 | static int hf_ssh_languages_client_to_server;
283 | static int hf_ssh_languages_server_to_client;
284 | static int hf_ssh_kex_algorithms_length;
285 | static int hf_ssh_server_host_key_algorithms_length;
286 | static int hf_ssh_encryption_algorithms_client_to_server_length;
287 | static int hf_ssh_encryption_algorithms_server_to_client_length;
288 | static int hf_ssh_mac_algorithms_client_to_server_length;
289 | static int hf_ssh_mac_algorithms_server_to_client_length;
290 | static int hf_ssh_compression_algorithms_client_to_server_length;
291 | static int hf_ssh_compression_algorithms_server_to_client_length;
292 | static int hf_ssh_languages_client_to_server_length;
293 | static int hf_ssh_languages_server_to_client_length;
294 | static int hf_ssh_first_kex_packet_follows;
295 | static int hf_ssh_kex_reserved;
296 | static int hf_ssh_kex_hassh_algo;
297 | static int hf_ssh_kex_hassh;
298 | static int hf_ssh_kex_hasshserver_algo;
299 | static int hf_ssh_kex_hasshserver;
300 |
301 | /* Key exchange common elements */
302 | static int hf_ssh_hostkey_length;
303 | static int hf_ssh_hostkey_type_length;
304 | static int hf_ssh_hostkey_type;
305 | static int hf_ssh_hostkey_data;
306 | static int hf_ssh_hostkey_rsa_n;
307 | static int hf_ssh_hostkey_rsa_e;
308 | static int hf_ssh_hostkey_dsa_p;
309 | static int hf_ssh_hostkey_dsa_q;
310 | static int hf_ssh_hostkey_dsa_g;
311 | static int hf_ssh_hostkey_dsa_y;
312 | static int hf_ssh_hostkey_ecdsa_curve_id;
313 | static int hf_ssh_hostkey_ecdsa_curve_id_length;
314 | static int hf_ssh_hostkey_ecdsa_q;
315 | static int hf_ssh_hostkey_ecdsa_q_length;
316 | static int hf_ssh_hostkey_eddsa_key;
317 | static int hf_ssh_hostkey_eddsa_key_length;
318 | static int hf_ssh_hostsig_length;
319 | static int hf_ssh_hostsig_type_length;
320 | static int hf_ssh_hostsig_type;
321 | static int hf_ssh_hostsig_rsa;
322 | static int hf_ssh_hostsig_dsa;
323 | static int hf_ssh_hostsig_data_length;
324 | static int hf_ssh_hostsig_data;
325 |
326 | /* Key exchange: Diffie-Hellman */
327 | static int hf_ssh_dh_e;
328 | static int hf_ssh_dh_f;
329 |
330 | /* Key exchange: Diffie-Hellman Group Exchange */
331 | static int hf_ssh_dh_gex_min;
332 | static int hf_ssh_dh_gex_nbits;
333 | static int hf_ssh_dh_gex_max;
334 | static int hf_ssh_dh_gex_p;
335 | static int hf_ssh_dh_gex_g;
336 |
337 | /* Key exchange: Elliptic Curve Diffie-Hellman */
338 | static int hf_ssh_ecdh_q_c;
339 | static int hf_ssh_ecdh_q_c_length;
340 | static int hf_ssh_ecdh_q_s;
341 | static int hf_ssh_ecdh_q_s_length;
342 |
343 | /* Key exchange: Post-Quantum Hybrid KEM */
344 | static int hf_ssh_hybrid_blob_client; // client's full PQ blob
345 | static int hf_ssh_hybrid_blob_client_len;
346 | static int hf_ssh_hybrid_blob_server; // server's full PQ blob
347 | static int hf_ssh_hybrid_blob_server_len;
348 | static int hf_ssh_pq_kem_client; // client's PQ public key
349 | static int hf_ssh_pq_kem_server; // server's PQ response
350 |
351 | /* Extension negotiation */
352 | static int hf_ssh_ext_count;
353 | static int hf_ssh_ext_name_length;
354 | static int hf_ssh_ext_name;
355 | static int hf_ssh_ext_value_length;
356 | static int hf_ssh_ext_value;
357 | static int hf_ssh_ext_server_sig_algs_algorithms;
358 | static int hf_ssh_ext_delay_compression_algorithms_client_to_server_length;
359 | static int hf_ssh_ext_delay_compression_algorithms_client_to_server;
360 | static int hf_ssh_ext_delay_compression_algorithms_server_to_client_length;
361 | static int hf_ssh_ext_delay_compression_algorithms_server_to_client;
362 | static int hf_ssh_ext_no_flow_control_value;
363 | static int hf_ssh_ext_elevation_value;
364 | static int hf_ssh_ext_prop_publickey_algorithms_algorithms;
365 |
366 | /* Miscellaneous */
367 | static int hf_ssh_mpint_length;
368 |
369 | static int hf_ssh_ignore_data_length;
370 | static int hf_ssh_ignore_data;
371 | static int hf_ssh_debug_always_display;
372 | static int hf_ssh_debug_message_length;
373 | static int hf_ssh_debug_message;
374 | static int hf_ssh_service_name_length;
375 | static int hf_ssh_service_name;
376 | static int hf_ssh_userauth_user_name_length;
377 | static int hf_ssh_userauth_user_name;
378 | static int hf_ssh_userauth_change_password;
379 | static int hf_ssh_userauth_service_name_length;
380 | static int hf_ssh_userauth_service_name;
381 | static int hf_ssh_userauth_method_name_length;
382 | static int hf_ssh_userauth_method_name;
383 | static int hf_ssh_userauth_have_signature;
384 | static int hf_ssh_userauth_password_length;
385 | static int hf_ssh_userauth_password;
386 | static int hf_ssh_userauth_new_password_length;
387 | static int hf_ssh_userauth_new_password;
388 | static int hf_ssh_auth_failure_list_length;
389 | static int hf_ssh_auth_failure_list;
390 | static int hf_ssh_userauth_partial_success;
391 | static int hf_ssh_userauth_pka_name_len;
392 | static int hf_ssh_userauth_pka_name;
393 | static int hf_ssh_pk_blob_name_length;
394 | static int hf_ssh_pk_blob_name;
395 | static int hf_ssh_blob_length;
396 | static int hf_ssh_signature_length;
397 | static int hf_ssh_pk_sig_blob_name_length;
398 | static int hf_ssh_pk_sig_blob_name;
399 | static int hf_ssh_connection_type_name_len;
400 | static int hf_ssh_connection_type_name;
401 | static int hf_ssh_connection_sender_channel;
402 | static int hf_ssh_connection_recipient_channel;
403 | static int hf_ssh_connection_initial_window;
404 | static int hf_ssh_connection_maximum_packet_size;
405 | static int hf_ssh_global_request_name_len;
406 | static int hf_ssh_global_request_name;
407 | static int hf_ssh_global_request_want_reply;
408 | static int hf_ssh_global_request_hostkeys_array_len;
409 | static int hf_ssh_channel_request_name_len;
410 | static int hf_ssh_channel_request_name;
411 | static int hf_ssh_channel_request_want_reply;
412 | static int hf_ssh_subsystem_name_len;
413 | static int hf_ssh_subsystem_name;
414 | static int hf_ssh_exec_cmd;
415 | static int hf_ssh_env_name;
416 | static int hf_ssh_env_value;
417 | static int hf_ssh_pty_term;
418 | static int hf_ssh_pty_term_width_char;
419 | static int hf_ssh_pty_term_height_row;
420 | static int hf_ssh_pty_term_width_pixel;
421 | static int hf_ssh_pty_term_height_pixel;
422 | static int hf_ssh_pty_term_modes_len;
423 | static int hf_ssh_pty_term_modes;
424 | static int hf_ssh_pty_term_mode;
425 | static int hf_ssh_pty_term_mode_opcode;
426 | static int hf_ssh_pty_term_mode_vintr;
427 | static int hf_ssh_pty_term_mode_vquit;
428 | static int hf_ssh_pty_term_mode_verase;
429 | static int hf_ssh_pty_term_mode_vkill;
430 | static int hf_ssh_pty_term_mode_veof;
431 | static int hf_ssh_pty_term_mode_veol;
432 | static int hf_ssh_pty_term_mode_veol2;
433 | static int hf_ssh_pty_term_mode_vstart;
434 | static int hf_ssh_pty_term_mode_vstop;
435 | static int hf_ssh_pty_term_mode_vsusp;
436 | static int hf_ssh_pty_term_mode_vdsusp;
437 | static int hf_ssh_pty_term_mode_vreprint;
438 | static int hf_ssh_pty_term_mode_vwerase;
439 | static int hf_ssh_pty_term_mode_vlnext;
440 | static int hf_ssh_pty_term_mode_vflush;
441 | static int hf_ssh_pty_term_mode_vswtch;
442 | static int hf_ssh_pty_term_mode_vstatus;
443 | static int hf_ssh_pty_term_mode_vdiscard;
444 | static int hf_ssh_pty_term_mode_ignpar;
445 | static int hf_ssh_pty_term_mode_parmrk;
446 | static int hf_ssh_pty_term_mode_inpck;
447 | static int hf_ssh_pty_term_mode_istrip;
448 | static int hf_ssh_pty_term_mode_inlcr;
449 | static int hf_ssh_pty_term_mode_igncr;
450 | static int hf_ssh_pty_term_mode_icrnl;
451 | static int hf_ssh_pty_term_mode_iuclc;
452 | static int hf_ssh_pty_term_mode_ixon;
453 | static int hf_ssh_pty_term_mode_ixany;
454 | static int hf_ssh_pty_term_mode_ixoff;
455 | static int hf_ssh_pty_term_mode_imaxbel;
456 | static int hf_ssh_pty_term_mode_iutf8;
457 | static int hf_ssh_pty_term_mode_isig;
458 | static int hf_ssh_pty_term_mode_icanon;
459 | static int hf_ssh_pty_term_mode_xcase;
460 | static int hf_ssh_pty_term_mode_echo;
461 | static int hf_ssh_pty_term_mode_echoe;
462 | static int hf_ssh_pty_term_mode_echok;
463 | static int hf_ssh_pty_term_mode_echonl;
464 | static int hf_ssh_pty_term_mode_noflsh;
465 | static int hf_ssh_pty_term_mode_tostop;
466 | static int hf_ssh_pty_term_mode_iexten;
467 | static int hf_ssh_pty_term_mode_echoctl;
468 | static int hf_ssh_pty_term_mode_echoke;
469 | static int hf_ssh_pty_term_mode_pendin;
470 | static int hf_ssh_pty_term_mode_opost;
471 | static int hf_ssh_pty_term_mode_olcuc;
472 | static int hf_ssh_pty_term_mode_onlcr;
473 | static int hf_ssh_pty_term_mode_ocrnl;
474 | static int hf_ssh_pty_term_mode_onocr;
475 | static int hf_ssh_pty_term_mode_onlret;
476 | static int hf_ssh_pty_term_mode_cs7;
477 | static int hf_ssh_pty_term_mode_cs8;
478 | static int hf_ssh_pty_term_mode_parenb;
479 | static int hf_ssh_pty_term_mode_parodd;
480 | static int hf_ssh_pty_term_mode_ispeed;
481 | static int hf_ssh_pty_term_mode_ospeed;
482 | static int hf_ssh_pty_term_mode_value;
483 | static int hf_ssh_channel_window_adjust;
484 | static int hf_ssh_channel_data_len;
485 | static int hf_ssh_channel_data_type_code;
486 | static int hf_ssh_exit_status;
487 | static int hf_ssh_disconnect_reason;
488 | static int hf_ssh_disconnect_description_length;
489 | static int hf_ssh_disconnect_description;
490 | static int hf_ssh_lang_tag_length;
491 | static int hf_ssh_lang_tag;
492 | static int hf_ssh_ping_data_length;
493 | static int hf_ssh_ping_data;
494 | static int hf_ssh_pong_data_length;
495 | static int hf_ssh_pong_data;
496 |
497 | static int hf_ssh_blob;
498 | static int hf_ssh_blob_e;
499 | static int hf_ssh_blob_n;
500 | static int hf_ssh_blob_dsa_p;
501 | static int hf_ssh_blob_dsa_q;
502 | static int hf_ssh_blob_dsa_g;
503 | static int hf_ssh_blob_dsa_y;
504 | static int hf_ssh_blob_ecdsa_curve_id;
505 | static int hf_ssh_blob_ecdsa_curve_id_length;
506 | static int hf_ssh_blob_ecdsa_q;
507 | static int hf_ssh_blob_ecdsa_q_length;
508 | static int hf_ssh_blob_eddsa_key;
509 | static int hf_ssh_blob_eddsa_key_length;
510 | static int hf_ssh_blob_data;
511 |
512 | static int hf_ssh_pk_sig_s_length;
513 | static int hf_ssh_pk_sig_s;
514 |
515 | static int hf_ssh_reassembled_in;
516 | static int hf_ssh_reassembled_length;
517 | static int hf_ssh_reassembled_data;
518 | static int hf_ssh_segments;
519 | static int hf_ssh_segment;
520 | static int hf_ssh_segment_overlap;
521 | static int hf_ssh_segment_overlap_conflict;
522 | static int hf_ssh_segment_multiple_tails;
523 | static int hf_ssh_segment_too_long_fragment;
524 | static int hf_ssh_segment_error;
525 | static int hf_ssh_segment_count;
526 | static int hf_ssh_segment_data;
527 |
528 | static int ett_ssh;
529 | static int ett_key_exchange;
530 | static int ett_key_exchange_host_key;
531 | static int ett_key_exchange_host_sig;
532 | static int ett_extension;
533 | static int ett_userauth_pk_blob;
534 | static int ett_userauth_pk_signature;
535 | static int ett_term_modes;
536 | static int ett_term_mode;
537 | static int ett_key_init;
538 | static int ett_ssh1;
539 | static int ett_ssh2;
540 | static int ett_ssh_segments;
541 | static int ett_ssh_segment;
542 | static int ett_ssh_pqhybrid_client;
543 | static int ett_ssh_pqhybrid_server;
544 |
545 | static expert_field ei_ssh_packet_length;
546 | static expert_field ei_ssh_padding_length;
547 | static expert_field ei_ssh_packet_decode;
548 | static expert_field ei_ssh_channel_number;
549 | static expert_field ei_ssh_invalid_keylen;
550 | static expert_field ei_ssh_mac_bad;
551 | static expert_field ei_ssh2_kex_hybrid_msg_code;
552 | static expert_field ei_ssh2_kex_hybrid_msg_code_unknown;
553 |
554 | static bool_Bool ssh_desegment = true1;
555 | static bool_Bool ssh_ignore_mac_failed;
556 |
557 | static dissector_handle_t ssh_handle;
558 | static dissector_handle_t sftp_handle;
559 | static dissector_handle_t data_text_lines_handle;
560 |
561 | static const char *pref_keylog_file;
562 | static FILE *ssh_keylog_file;
563 |
564 | static reassembly_table ssh_reassembly_table;
565 |
566 | static const fragment_items ssh_segment_items = {
567 | &ett_ssh_segment,
568 | &ett_ssh_segments,
569 | &hf_ssh_segments,
570 | &hf_ssh_segment,
571 | &hf_ssh_segment_overlap,
572 | &hf_ssh_segment_overlap_conflict,
573 | &hf_ssh_segment_multiple_tails,
574 | &hf_ssh_segment_too_long_fragment,
575 | &hf_ssh_segment_error,
576 | &hf_ssh_segment_count,
577 | &hf_ssh_reassembled_in,
578 | &hf_ssh_reassembled_length,
579 | &hf_ssh_reassembled_data,
580 | "Segments"
581 | };
582 |
583 | #define SSH_DECRYPT_DEBUG
584 |
585 | #ifdef SSH_DECRYPT_DEBUG
586 | static const char *ssh_debug_file_name;
587 | #endif
588 |
589 | #define TCP_RANGE_SSH"22" "22"
590 | #define SCTP_PORT_SSH22 22
591 |
592 | /* Message Numbers (from RFC 4250) (1-255) */
593 |
594 | /* Transport layer protocol: generic (1-19) */
595 | #define SSH_MSG_DISCONNECT1 1
596 | #define SSH_MSG_IGNORE2 2
597 | #define SSH_MSG_UNIMPLEMENTED3 3
598 | #define SSH_MSG_DEBUG4 4
599 | #define SSH_MSG_SERVICE_REQUEST5 5
600 | #define SSH_MSG_SERVICE_ACCEPT6 6
601 | #define SSH_MSG_EXT_INFO7 7
602 | #define SSH_MSG_NEWCOMPRESS8 8
603 |
604 | /* Transport layer protocol: Algorithm negotiation (20-29) */
605 | #define SSH_MSG_KEXINIT20 20
606 | #define SSH_MSG_NEWKEYS21 21
607 |
608 | /* Transport layer: Key exchange method specific (reusable) (30-49) */
609 | #define SSH_MSG_KEXDH_INIT30 30
610 | #define SSH_MSG_KEXDH_REPLY31 31
611 |
612 | #define SSH_MSG_KEX_DH_GEX_REQUEST_OLD30 30
613 | #define SSH_MSG_KEX_DH_GEX_GROUP31 31
614 | #define SSH_MSG_KEX_DH_GEX_INIT32 32
615 | #define SSH_MSG_KEX_DH_GEX_REPLY33 33
616 | #define SSH_MSG_KEX_DH_GEX_REQUEST34 34
617 |
618 | #define SSH_MSG_KEX_ECDH_INIT30 30
619 | #define SSH_MSG_KEX_ECDH_REPLY31 31
620 |
621 | #define SSH_MSG_KEX_HYBRID_INIT30 30
622 | #define SSH_MSG_KEX_HYBRID_REPLY31 31
623 |
624 | /* User authentication protocol: generic (50-59) */
625 | #define SSH_MSG_USERAUTH_REQUEST50 50
626 | #define SSH_MSG_USERAUTH_FAILURE51 51
627 | #define SSH_MSG_USERAUTH_SUCCESS52 52
628 | #define SSH_MSG_USERAUTH_BANNER53 53
629 |
630 | /* User authentication protocol: method specific (reusable) (50-79) */
631 | #define SSH_MSG_USERAUTH_PK_OK60 60
632 |
633 | /* Connection protocol: generic (80-89) */
634 | #define SSH_MSG_GLOBAL_REQUEST80 80
635 | #define SSH_MSG_REQUEST_SUCCESS81 81
636 | #define SSH_MSG_REQUEST_FAILURE82 82
637 |
638 | /* Connection protocol: channel related messages (90-127) */
639 | #define SSH_MSG_CHANNEL_OPEN90 90
640 | #define SSH_MSG_CHANNEL_OPEN_CONFIRMATION91 91
641 | #define SSH_MSG_CHANNEL_OPEN_FAILURE92 92
642 | #define SSH_MSG_CHANNEL_WINDOW_ADJUST93 93
643 | #define SSH_MSG_CHANNEL_DATA94 94
644 | #define SSH_MSG_CHANNEL_EXTENDED_DATA95 95
645 | #define SSH_MSG_CHANNEL_EOF96 96
646 | #define SSH_MSG_CHANNEL_CLOSE97 97
647 | #define SSH_MSG_CHANNEL_REQUEST98 98
648 | #define SSH_MSG_CHANNEL_SUCCESS99 99
649 | #define SSH_MSG_CHANNEL_FAILURE100 100
650 |
651 | /* 128-191 reserved for client protocols */
652 | /* 192-255 local extensions */
653 | #define SSH_MSG_PING192 192
654 | #define SSH_MSG_PONG193 193
655 |
656 | #define CIPHER_AES128_CTR0x00010001 0x00010001
657 | #define CIPHER_AES192_CTR0x00010003 0x00010003
658 | #define CIPHER_AES256_CTR0x00010004 0x00010004
659 | #define CIPHER_AES128_CBC0x00020001 0x00020001
660 | #define CIPHER_AES192_CBC0x00020002 0x00020002
661 | #define CIPHER_AES256_CBC0x00020004 0x00020004
662 | #define CIPHER_AES128_GCM0x00040001 0x00040001
663 | //#define CIPHER_AES192_GCM 0x00040002 -- does not exist
664 | #define CIPHER_AES256_GCM0x00040004 0x00040004
665 | // DO NOT USE 0x00040000 (used by SSH_KEX_SNTRUP761X25519)
666 | #define CIPHER_NULL0x00080000 0x00080000
667 |
668 | #define CIPHER_MAC_SHA2_2560x00020001 0x00020001
669 |
670 | #define SSH_EXTENDED_DATA_STDERR1 1
671 |
672 | #define SSH_TTY_OP_END0 0
673 | #define SSH_TTY_OP_VINTR1 1
674 | #define SSH_TTY_OP_VQUIT2 2
675 | #define SSH_TTY_OP_VERASE3 3
676 | #define SSH_TTY_OP_VKILL4 4
677 | #define SSH_TTY_OP_VEOF5 5
678 | #define SSH_TTY_OP_VEOL6 6
679 | #define SSH_TTY_OP_VEOL27 7
680 | #define SSH_TTY_OP_VSTART8 8
681 | #define SSH_TTY_OP_VSTOP9 9
682 | #define SSH_TTY_OP_VSUSP10 10
683 | #define SSH_TTY_OP_VDSUSP11 11
684 | #define SSH_TTY_OP_VREPRINT12 12
685 | #define SSH_TTY_OP_VWERASE13 13
686 | #define SSH_TTY_OP_VLNEXT14 14
687 | #define SSH_TTY_OP_VFLUSH15 15
688 | #define SSH_TTY_OP_VSWTCH16 16
689 | #define SSH_TTY_OP_VSTATUS17 17
690 | #define SSH_TTY_OP_VDISCARD18 18
691 | #define SSH_TTY_OP_IGNPAR30 30
692 | #define SSH_TTY_OP_PARMRK31 31
693 | #define SSH_TTY_OP_INPCK32 32
694 | #define SSH_TTY_OP_ISTRIP33 33
695 | #define SSH_TTY_OP_INLCR34 34
696 | #define SSH_TTY_OP_IGNCR35 35
697 | #define SSH_TTY_OP_ICRNL36 36
698 | #define SSH_TTY_OP_IUCLC37 37
699 | #define SSH_TTY_OP_IXON38 38
700 | #define SSH_TTY_OP_IXANY39 39
701 | #define SSH_TTY_OP_IXOFF40 40
702 | #define SSH_TTY_OP_IMAXBEL41 41
703 | #define SSH_TTY_OP_IUTF842 42
704 | #define SSH_TTY_OP_ISIG50 50
705 | #define SSH_TTY_OP_ICANON51 51
706 | #define SSH_TTY_OP_XCASE52 52
707 | #define SSH_TTY_OP_ECHO53 53
708 | #define SSH_TTY_OP_ECHOE54 54
709 | #define SSH_TTY_OP_ECHOK55 55
710 | #define SSH_TTY_OP_ECHONL56 56
711 | #define SSH_TTY_OP_NOFLSH57 57
712 | #define SSH_TTY_OP_TOSTOP58 58
713 | #define SSH_TTY_OP_IEXTEN59 59
714 | #define SSH_TTY_OP_ECHOCTL60 60
715 | #define SSH_TTY_OP_ECHOKE61 61
716 | #define SSH_TTY_OP_PENDIN62 62
717 | #define SSH_TTY_OP_OPOST70 70
718 | #define SSH_TTY_OP_OLCUC71 71
719 | #define SSH_TTY_OP_ONLCR72 72
720 | #define SSH_TTY_OP_OCRNL73 73
721 | #define SSH_TTY_OP_ONOCR74 74
722 | #define SSH_TTY_OP_ONLRET75 75
723 | #define SSH_TTY_OP_CS790 90
724 | #define SSH_TTY_OP_CS891 91
725 | #define SSH_TTY_OP_PARENB92 92
726 | #define SSH_TTY_OP_PARODD93 93
727 | #define SSH_TTY_OP_ISPEED128 128
728 | #define SSH_TTY_OP_OSPEED129 129
729 |
730 | static const value_string ssh2_msg_vals[] = {
731 | { SSH_MSG_DISCONNECT1, "Disconnect" },
732 | { SSH_MSG_IGNORE2, "Ignore" },
733 | { SSH_MSG_UNIMPLEMENTED3, "Unimplemented" },
734 | { SSH_MSG_DEBUG4, "Debug" },
735 | { SSH_MSG_SERVICE_REQUEST5, "Service Request" },
736 | { SSH_MSG_SERVICE_ACCEPT6, "Service Accept" },
737 | { SSH_MSG_EXT_INFO7, "Extension Information" },
738 | { SSH_MSG_NEWCOMPRESS8, "New Compression" },
739 | { SSH_MSG_KEXINIT20, "Key Exchange Init" },
740 | { SSH_MSG_NEWKEYS21, "New Keys" },
741 | { SSH_MSG_USERAUTH_REQUEST50, "User Authentication Request" },
742 | { SSH_MSG_USERAUTH_FAILURE51, "User Authentication Failure" },
743 | { SSH_MSG_USERAUTH_SUCCESS52, "User Authentication Success" },
744 | { SSH_MSG_USERAUTH_BANNER53, "User Authentication Banner" },
745 | { SSH_MSG_GLOBAL_REQUEST80, "Global Request" },
746 | { SSH_MSG_REQUEST_SUCCESS81, "Request Success" },
747 | { SSH_MSG_REQUEST_FAILURE82, "Request Failure" },
748 | { SSH_MSG_CHANNEL_OPEN90, "Channel Open" },
749 | { SSH_MSG_CHANNEL_OPEN_CONFIRMATION91, "Channel Open Confirmation" },
750 | { SSH_MSG_CHANNEL_OPEN_FAILURE92, "Channel Open Failure" },
751 | { SSH_MSG_CHANNEL_WINDOW_ADJUST93, "Window Adjust" },
752 | { SSH_MSG_CHANNEL_DATA94, "Channel Data" },
753 | { SSH_MSG_CHANNEL_EXTENDED_DATA95, "Channel Extended Data" },
754 | { SSH_MSG_CHANNEL_EOF96, "Channel EOF" },
755 | { SSH_MSG_CHANNEL_CLOSE97, "Channel Close" },
756 | { SSH_MSG_CHANNEL_REQUEST98, "Channel Request" },
757 | { SSH_MSG_CHANNEL_SUCCESS99, "Channel Success" },
758 | { SSH_MSG_CHANNEL_FAILURE100, "Channel Failure" },
759 | { SSH_MSG_USERAUTH_PK_OK60, "Public Key algorithm accepted" },
760 | { 0, NULL((void*)0) }
761 | };
762 |
763 | static const value_string ssh2_kex_dh_msg_vals[] = {
764 | { SSH_MSG_KEXDH_INIT30, "Diffie-Hellman Key Exchange Init" },
765 | { SSH_MSG_KEXDH_REPLY31, "Diffie-Hellman Key Exchange Reply" },
766 | { 0, NULL((void*)0) }
767 | };
768 |
769 | static const value_string ssh2_kex_dh_gex_msg_vals[] = {
770 | { SSH_MSG_KEX_DH_GEX_REQUEST_OLD30, "Diffie-Hellman Group Exchange Request (Old)" },
771 | { SSH_MSG_KEX_DH_GEX_GROUP31, "Diffie-Hellman Group Exchange Group" },
772 | { SSH_MSG_KEX_DH_GEX_INIT32, "Diffie-Hellman Group Exchange Init" },
773 | { SSH_MSG_KEX_DH_GEX_REPLY33, "Diffie-Hellman Group Exchange Reply" },
774 | { SSH_MSG_KEX_DH_GEX_REQUEST34, "Diffie-Hellman Group Exchange Request" },
775 | { 0, NULL((void*)0) }
776 | };
777 |
778 | static const value_string ssh2_kex_ecdh_msg_vals[] = {
779 | { SSH_MSG_KEX_ECDH_INIT30, "Elliptic Curve Diffie-Hellman Key Exchange Init" },
780 | { SSH_MSG_KEX_ECDH_REPLY31, "Elliptic Curve Diffie-Hellman Key Exchange Reply" },
781 | { 0, NULL((void*)0) }
782 | };
783 |
784 | static const value_string ssh2_kex_hybrid_msg_vals[] = {
785 | { SSH_MSG_KEX_HYBRID_INIT30, "PQ/T Hybrid Key Exchange Init" },
786 | { SSH_MSG_KEX_HYBRID_REPLY31, "PQ/T Hybrid Key Exchange Reply" },
787 | { 0, NULL((void*)0) }
788 | };
789 |
790 | static const value_string ssh2_ext_ping_msg_vals[] = {
791 | { SSH_MSG_PING192, "Ping" },
792 | { SSH_MSG_PONG193, "Pong" },
793 | { 0, NULL((void*)0) }
794 | };
795 |
796 | static const value_string ssh1_msg_vals[] = {
797 | {SSH1_MSG_NONE0, "No Message"},
798 | {SSH1_MSG_DISCONNECT1, "Disconnect"},
799 | {SSH1_SMSG_PUBLIC_KEY2, "Public Key"},
800 | {SSH1_CMSG_SESSION_KEY3, "Session Key"},
801 | {SSH1_CMSG_USER4, "User"},
802 | {0, NULL((void*)0)}
803 | };
804 |
805 | static const value_string ssh_channel_data_type_code_vals[] = {
806 | { SSH_EXTENDED_DATA_STDERR1, "Standard Error" },
807 | { 0, NULL((void*)0) }
808 | };
809 |
810 | static const value_string ssh_tty_op_vals[] = {
811 | { SSH_TTY_OP_END0, "TTY_OP_END" }, // [RFC4250]
812 | { SSH_TTY_OP_VINTR1, "VINTR" }, // [RFC4254],Section 8
813 | { SSH_TTY_OP_VQUIT2, "VQUIT" }, // [RFC4254],Section 8
814 | { SSH_TTY_OP_VERASE3, "VERASE" }, // [RFC4254],Section 8
815 | { SSH_TTY_OP_VKILL4, "VKILL" }, // [RFC4254], Section 8
816 | { SSH_TTY_OP_VEOF5, "VEOF" }, // [RFC4254],Section 8
817 | { SSH_TTY_OP_VEOL6, "VEOL" }, // [RFC4254],Section 8
818 | { SSH_TTY_OP_VEOL27, "VEOL2" }, // [RFC4254], Section 8
819 | { SSH_TTY_OP_VSTART8, "VSTART" }, // [RFC4254],Section 8
820 | { SSH_TTY_OP_VSTOP9, "VSTOP" }, // [RFC4254], Section 8
821 | { SSH_TTY_OP_VSUSP10, "VSUSP" }, // [RFC4254], Section 8
822 | { SSH_TTY_OP_VDSUSP11, "VDSUSP" }, // [RFC4254], Section 8
823 | { SSH_TTY_OP_VREPRINT12, "VREPRINT" }, // [RFC4254], Section 8
824 | { SSH_TTY_OP_VWERASE13, "VWERASE" }, // [RFC4254], Section 8
825 | { SSH_TTY_OP_VLNEXT14, "VLNEXT" }, // [RFC4254],Section 8
826 | { SSH_TTY_OP_VFLUSH15, "VFLUSH" }, // [RFC4254], Section 8
827 | { SSH_TTY_OP_VSWTCH16, "VSWTCH" }, // [RFC4254], Section 8
828 | { SSH_TTY_OP_VSTATUS17, "VSTATUS" }, // [RFC4254],Section 8
829 | { SSH_TTY_OP_VDISCARD18, "VDISCARD" }, // [RFC4254], Section 8
830 | { SSH_TTY_OP_IGNPAR30, "IGNPAR" }, // [RFC4254],Section 8
831 | { SSH_TTY_OP_PARMRK31, "PARMRK" }, // [RFC4254], Section 8
832 | { SSH_TTY_OP_INPCK32, "INPCK" }, // [RFC4254], Section 8
833 | { SSH_TTY_OP_ISTRIP33, "ISTRIP" }, // [RFC4254], Section 8
834 | { SSH_TTY_OP_INLCR34, "INLCR" }, // [RFC4254], Section 8
835 | { SSH_TTY_OP_IGNCR35, "IGNCR" }, // [RFC4254], Section 8
836 | { SSH_TTY_OP_ICRNL36, "ICRNL" }, // [RFC4254], Section 8
837 | { SSH_TTY_OP_IUCLC37, "IUCLC" }, // [RFC4254],Section 8
838 | { SSH_TTY_OP_IXON38, "IXON" }, // [RFC4254], Section 8
839 | { SSH_TTY_OP_IXANY39, "IXANY" }, // [RFC4254], Section 8
840 | { SSH_TTY_OP_IXOFF40, "IXOFF" }, // [RFC4254], Section 8
841 | { SSH_TTY_OP_IMAXBEL41, "IMAXBEL" }, // [RFC4254], Section 8
842 | { SSH_TTY_OP_IUTF842, "IUTF8" }, // [RFC8160],
843 | { SSH_TTY_OP_ISIG50, "ISIG" }, // [RFC4254], Section 8
844 | { SSH_TTY_OP_ICANON51, "ICANON" }, // [RFC4254], Section 8
845 | { SSH_TTY_OP_XCASE52, "XCASE" }, // [RFC4254],Section 8
846 | { SSH_TTY_OP_ECHO53, "ECHO" }, // [RFC4254], Section 8
847 | { SSH_TTY_OP_ECHOE54, "ECHOE" }, // [RFC4254], Section 8
848 | { SSH_TTY_OP_ECHOK55, "ECHOK" }, // [RFC4254], Section 8
849 | { SSH_TTY_OP_ECHONL56, "ECHONL" }, // [RFC4254], Section 8
850 | { SSH_TTY_OP_NOFLSH57, "NOFLSH" }, // [RFC4254],Section 8
851 | { SSH_TTY_OP_TOSTOP58, "TOSTOP" }, // [RFC4254], Section 8
852 | { SSH_TTY_OP_IEXTEN59, "IEXTEN" }, // [RFC4254], Section 8
853 | { SSH_TTY_OP_ECHOCTL60, "ECHOCTL" }, // [RFC4254], Section 8
854 | { SSH_TTY_OP_ECHOKE61, "ECHOKE" }, // [RFC4254], Section 8
855 | { SSH_TTY_OP_PENDIN62, "PENDIN" }, // [RFC4254], Section 8
856 | { SSH_TTY_OP_OPOST70, "OPOST" }, // [RFC4254], Section 8
857 | { SSH_TTY_OP_OLCUC71, "OLCUC" }, // [RFC4254], Section 8
858 | { SSH_TTY_OP_ONLCR72, "ONLCR" }, // [RFC4254], Section 8
859 | { SSH_TTY_OP_OCRNL73, "OCRNL" }, // [RFC4254],Section 8
860 | { SSH_TTY_OP_ONOCR74, "ONOCR" }, // [RFC4254],Section 8
861 | { SSH_TTY_OP_ONLRET75, "ONLRET" }, // [RFC4254],Section 8
862 | { SSH_TTY_OP_CS790, "CS7" }, // [RFC4254], Section 8
863 | { SSH_TTY_OP_CS891, "CS8" }, // [RFC4254], Section 8
864 | { SSH_TTY_OP_PARENB92, "PARENB" }, // [RFC4254], Section 8
865 | { SSH_TTY_OP_PARODD93, "PARODD" }, // [RFC4254], Section 8
866 | { SSH_TTY_OP_ISPEED128, "TTY_OP_ISPEED" }, // [RFC4254],Section 8
867 | { SSH_TTY_OP_OSPEED129, "TTY_OP_OSPEED" }, // [RFC4254],Section 8
868 | { 0, NULL((void*)0) }
869 | };
870 |
871 | static int ssh_dissect_key_init(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree,
872 | int is_response,
873 | struct ssh_flow_data *global_data);
874 | static int ssh_dissect_proposal(tvbuff_t *tvb, int offset, proto_tree *tree,
875 | int hf_index_length, int hf_index_value, char **store);
876 | static int ssh_dissect_ssh1(tvbuff_t *tvb, packet_info *pinfo,
877 | struct ssh_flow_data *global_data,
878 | int offset, proto_tree *tree, int is_response,
879 | bool_Bool *need_desegmentation);
880 | static int ssh_dissect_ssh2(tvbuff_t *tvb, packet_info *pinfo,
881 | struct ssh_flow_data *global_data,
882 | int offset, proto_tree *tree, int is_response,
883 | bool_Bool *need_desegmentation);
884 | static int ssh_dissect_key_exchange(tvbuff_t *tvb, packet_info *pinfo,
885 | struct ssh_flow_data *global_data,
886 | int offset, proto_tree *tree, int is_response,
887 | bool_Bool *need_desegmentation);
888 | static int ssh_dissect_kex_dh(uint8_t msg_code, tvbuff_t *tvb,
889 | packet_info *pinfo, int offset, proto_tree *tree,
890 | struct ssh_flow_data *global_data);
891 | static int ssh_dissect_kex_dh_gex(uint8_t msg_code, tvbuff_t *tvb,
892 | packet_info *pinfo, int offset, proto_tree *tree,
893 | struct ssh_flow_data *global_data);
894 | static int ssh_dissect_kex_ecdh(uint8_t msg_code, tvbuff_t *tvb,
895 | packet_info *pinfo, int offset, proto_tree *tree,
896 | struct ssh_flow_data *global_data);
897 | static int ssh_dissect_kex_pq_hybrid(uint8_t msg_code, tvbuff_t *tvb,
898 | packet_info *pinfo, int offset, proto_tree *tree,
899 | struct ssh_flow_data *global_data);
900 | static int // add support of client PQ hybrid key (e)
901 | ssh_read_e_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data);
902 | static int // add support of server PQ hybrid key (f)
903 | ssh_read_f_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data);
904 | static int ssh_dissect_protocol(tvbuff_t *tvb, packet_info *pinfo,
905 | struct ssh_flow_data *global_data,
906 | unsigned offset, proto_tree *tree, int is_response, unsigned *version,
907 | bool_Bool *need_desegmentation);
908 | static int ssh_try_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
909 | struct ssh_peer_data *peer_data, int offset, proto_tree *tree);
910 | static int ssh_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
911 | struct ssh_peer_data *peer_data,
912 | int offset, proto_tree *tree);
913 | static bool_Bool ssh_choose_algo(char *client, char *server, char **result);
914 | static void ssh_set_mac_length(struct ssh_peer_data *peer_data);
915 | static void ssh_set_kex_specific_dissector(struct ssh_flow_data *global_data);
916 |
917 | static void ssh_keylog_read_file(void);
918 | static void ssh_keylog_process_line(const char *line);
919 | static void ssh_keylog_process_lines(const uint8_t *data, unsigned datalen);
920 | static void ssh_keylog_reset(void);
921 | static ssh_bignum *ssh_kex_make_bignum(const uint8_t *data, unsigned length);
922 | static bool_Bool ssh_read_e(tvbuff_t *tvb, int offset,
923 | struct ssh_flow_data *global_data);
924 | static bool_Bool ssh_read_f(tvbuff_t *tvb, int offset,
925 | struct ssh_flow_data *global_data);
926 | static ssh_bignum * ssh_read_mpint(tvbuff_t *tvb, int offset);
927 | static void ssh_keylog_hash_write_secret(struct ssh_flow_data *global_data, wmem_allocator_t* tmp_allocator);
928 | static ssh_bignum *ssh_kex_shared_secret(int kex_type, ssh_bignum *pub, ssh_bignum *priv, ssh_bignum *modulo);
929 | static void ssh_hash_buffer_put_string(wmem_array_t *buffer, const uint8_t *string,
930 | unsigned len);
931 | static void ssh_hash_buffer_put_uint32(wmem_array_t *buffer, unsigned val);
932 | static char *ssh_string(wmem_allocator_t* allocator, const uint8_t *string, unsigned len);
933 | static void ssh_derive_symmetric_keys(ssh_bignum *shared_secret,
934 | uint8_t *exchange_hash, unsigned hash_length,
935 | struct ssh_flow_data *global_data);
936 | static void ssh_derive_symmetric_key(ssh_bignum *shared_secret,
937 | const uint8_t *exchange_hash, unsigned hash_length, char id,
938 | ssh_bignum *result_key, struct ssh_flow_data *global_data, unsigned we_need);
939 |
940 | static void ssh_choose_enc_mac(struct ssh_flow_data *global_data);
941 | static void ssh_decryption_set_cipher_id(struct ssh_peer_data *peer);
942 | static void ssh_decryption_setup_cipher(struct ssh_peer_data *peer,
943 | ssh_bignum *iv, ssh_bignum *key);
944 | static void ssh_decryption_set_mac_id(struct ssh_peer_data *peer);
945 | static void ssh_decryption_setup_mac(struct ssh_peer_data *peer,
946 | ssh_bignum *iv);
947 | static ssh_packet_info_t* ssh_get_packet_info(packet_info *pinfo, bool_Bool is_response);
948 | static ssh_message_info_t* ssh_get_message(packet_info *pinfo, int record_id);
949 | static unsigned ssh_decrypt_packet(tvbuff_t *tvb, packet_info *pinfo,
950 | struct ssh_peer_data *peer_data, int offset);
951 | static bool_Bool ssh_decrypt_chacha20(gcry_cipher_hd_t hd, uint32_t seqnr,
952 | uint32_t counter, const unsigned char *ctext, unsigned ctext_len,
953 | unsigned char *plain, unsigned plain_len);
954 | static int ssh_dissect_decrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
955 | struct ssh_peer_data *peer_data, proto_tree *tree,
956 | ssh_message_info_t *message);
957 | static int ssh_dissect_transport_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
958 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code);
959 | static int ssh_dissect_rfc8308_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
960 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree);
961 | static int ssh_dissect_userauth_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
962 | int offset, proto_item *msg_type_tree, unsigned msg_code);
963 | static int ssh_dissect_userauth_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
964 | int offset, proto_item *msg_type_tree, unsigned msg_code);
965 | static int ssh_dissect_connection_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
966 | struct ssh_peer_data *peer_data, int offset, proto_item *msg_type_tree,
967 | unsigned msg_code, ssh_message_info_t *message);
968 | static int ssh_dissect_connection_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
969 | int offset, proto_item *msg_type_tree, unsigned msg_code);
970 | static int ssh_dissect_local_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
971 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code);
972 | static int ssh_dissect_public_key_blob(tvbuff_t *tvb, packet_info *pinfo,
973 | proto_item *msg_type_tree);
974 | static int ssh_dissect_public_key_signature(tvbuff_t *packet_tvb, packet_info *pinfo,
975 | int offset, proto_item *msg_type_tree);
976 |
977 | static void create_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, uint32_t sender_channel);
978 | static ssh_channel_info_t* get_channel_info_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel);
979 | static void set_subdissector_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, const char* subsystem_name);
980 |
981 | #define SSH_DEBUG_USE_STDERR"-" "-"
982 |
983 | #ifdef SSH_DECRYPT_DEBUG
984 | static void
985 | ssh_debug_printf(const char* fmt,...) G_GNUC_PRINTF(1,2)__attribute__((__format__ (__printf__, 1, 2)));
986 | static void
987 | ssh_print_data(const char* name, const unsigned char* data, size_t len);
988 | static void
989 | ssh_set_debug(const char* name);
990 | static void
991 | ssh_debug_flush(void);
992 | #else
993 |
994 | /* No debug: nullify debug operation*/
995 | static inline void G_GNUC_PRINTF(1,2)__attribute__((__format__ (__printf__, 1, 2)))
996 | ssh_debug_printf(const char* fmt _U___attribute__((unused)),...)
997 | {
998 | }
999 | #define ssh_print_data(a, b, c)
1000 | #define ssh_print_string(a, b)
1001 | #define ssh_set_debug(name)
1002 | #define ssh_debug_flush()
1003 |
1004 | #endif /* SSH_DECRYPT_DEBUG */
1005 |
1006 | static void
1007 | ssh_set_server(struct ssh_flow_data *global_data, address *addr, uint32_t port)
1008 | {
1009 | copy_address_wmem(wmem_file_scope(), &global_data->srv_addr, addr);
1010 | global_data->srv_port = port;
1011 | }
1012 |
1013 | static bool_Bool
1014 | ssh_packet_from_server(struct ssh_flow_data *session, const packet_info *pinfo)
1015 | {
1016 | bool_Bool ret;
1017 | if (session && session->srv_addr.type != AT_NONE) {
1018 | ret = (session->srv_port == pinfo->srcport) &&
1019 | addresses_equal(&session->srv_addr, &pinfo->src);
1020 | } else {
1021 | ret = (pinfo->match_uint == pinfo->srcport);
1022 | }
1023 |
1024 | ssh_debug_printf("packet_from_server: is from server - %s\n", (ret)?"TRUE":"FALSE");
1025 | return ret;
1026 | }
1027 |
1028 | static bool_Bool
1029 | ssh_peer_data_from_server(struct ssh_peer_data* peer_data) {
1030 | return &peer_data->global_data->peer_data[SERVER_PEER_DATA1] == peer_data;
1031 | }
1032 |
1033 | static int
1034 | dissect_ssh(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
1035 | {
1036 | proto_tree *ssh_tree;
1037 | proto_item *ti;
1038 | conversation_t *conversation;
1039 | int last_offset, offset = 0;
1040 |
1041 | bool_Bool is_response,
1042 | need_desegmentation;
1043 | unsigned version;
1044 |
1045 | struct ssh_flow_data *global_data = NULL((void*)0);
1046 | struct ssh_peer_data *peer_data;
1047 |
1048 | ssh_debug_printf("\ndissect_ssh enter frame #%u (%s)\n", pinfo->num, (pinfo->fd->visited)?"already visited":"first time");
1049 |
1050 | conversation = find_or_create_conversation(pinfo);
1051 |
1052 | global_data = (struct ssh_flow_data *)conversation_get_proto_data(conversation, proto_ssh);
1053 | if (!global_data) {
1054 | global_data = wmem_new0(wmem_file_scope(), struct ssh_flow_data)((struct ssh_flow_data*)wmem_alloc0((wmem_file_scope()), sizeof (struct ssh_flow_data)));
1055 | global_data->version = SSH_VERSION_UNKNOWN0;
1056 | global_data->kex_specific_dissector = ssh_dissect_kex_dh;
1057 | global_data->peer_data[CLIENT_PEER_DATA0].mac_length = -1;
1058 | global_data->peer_data[SERVER_PEER_DATA1].mac_length = -1;
1059 | global_data->peer_data[CLIENT_PEER_DATA0].sequence_number = 0;
1060 | global_data->peer_data[SERVER_PEER_DATA1].sequence_number = 0;
1061 | global_data->peer_data[CLIENT_PEER_DATA0].bn_cookie = NULL((void*)0);
1062 | global_data->peer_data[SERVER_PEER_DATA1].bn_cookie = NULL((void*)0);
1063 | global_data->peer_data[CLIENT_PEER_DATA0].global_data = global_data;
1064 | global_data->peer_data[SERVER_PEER_DATA1].global_data = global_data;
1065 | global_data->kex_client_version = wmem_array_new(wmem_file_scope(), 1);
1066 | global_data->kex_server_version = wmem_array_new(wmem_file_scope(), 1);
1067 | global_data->kex_client_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
1068 | global_data->kex_server_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
1069 | global_data->kex_server_host_key_blob = wmem_array_new(wmem_file_scope(), 1);
1070 | global_data->kex_gex_bits_min = wmem_array_new(wmem_file_scope(), 1);
1071 | global_data->kex_gex_bits_req = wmem_array_new(wmem_file_scope(), 1);
1072 | global_data->kex_gex_bits_max = wmem_array_new(wmem_file_scope(), 1);
1073 | global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
1074 | global_data->do_decrypt = true1;
1075 | global_data->ext_ping_openssh_offered = false0;
1076 |
1077 | /* We expect to get the client message first. If this is from an
1078 | * an assigned server port, call it the server, otherwise call it
1079 | * the client.
1080 | * XXX - We don't unambiguously know which side is the server and
1081 | * which the client until the KEX specific _INIT and _REPLY messages;
1082 | * we ought to be able to handle the cases where the version string or
1083 | * KEXINIT messages are out of order or where the client version string
1084 | * is missing. */
1085 | if (pinfo->match_uint == pinfo->srcport) {
1086 | ssh_set_server(global_data, &pinfo->src, pinfo->srcport);
1087 | } else {
1088 | ssh_set_server(global_data, &pinfo->dst, pinfo->destport);
1089 | }
1090 |
1091 | conversation_add_proto_data(conversation, proto_ssh, global_data);
1092 | }
1093 |
1094 | is_response = ssh_packet_from_server(global_data, pinfo);
1095 | peer_data = &global_data->peer_data[is_response];
1096 |
1097 | ti = proto_tree_add_item(tree, proto_ssh, tvb, offset, -1, ENC_NA0x00000000);
1098 | ssh_tree = proto_item_add_subtree(ti, ett_ssh);
1099 |
1100 | version = global_data->version;
1101 |
1102 | switch(version) {
1103 | case SSH_VERSION_UNKNOWN0:
1104 | col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSH");
1105 | break;
1106 | case SSH_VERSION_11:
1107 | col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSHv1");
1108 | break;
1109 | case SSH_VERSION_22:
1110 | col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSHv2");
1111 | break;
1112 |
1113 | }
1114 |
1115 | col_clear(pinfo->cinfo, COL_INFO);
1116 |
1117 | while(tvb_reported_length_remaining(tvb, offset)> 0) {
1118 | bool_Bool after_version_start = (peer_data->frame_version_start == 0 ||
1119 | pinfo->num >= peer_data->frame_version_start);
1120 | bool_Bool before_version_end = (peer_data->frame_version_end == 0 ||
1121 | pinfo->num <= peer_data->frame_version_end);
1122 |
1123 | need_desegmentation = false0;
1124 | last_offset = offset;
1125 |
1126 | peer_data->counter++;
1127 |
1128 | if (after_version_start && before_version_end &&
1129 | (tvb_strncaseeql(tvb, offset, "SSH-", 4) == 0)) {
1130 | if (peer_data->frame_version_start == 0)
1131 | peer_data->frame_version_start = pinfo->num;
1132 |
1133 | offset = ssh_dissect_protocol(tvb, pinfo,
1134 | global_data,
1135 | offset, ssh_tree, is_response,
1136 | &version, &need_desegmentation);
1137 |
1138 | if (!need_desegmentation) {
1139 | peer_data->frame_version_end = pinfo->num;
1140 | global_data->version = version;
1141 | }
1142 | } else {
1143 | switch(version) {
1144 |
1145 | case SSH_VERSION_UNKNOWN0:
1146 | offset = ssh_try_dissect_encrypted_packet(tvb, pinfo,
1147 | &global_data->peer_data[is_response], offset, ssh_tree);
1148 | break;
1149 |
1150 | case SSH_VERSION_11:
1151 | offset = ssh_dissect_ssh1(tvb, pinfo, global_data,
1152 | offset, ssh_tree, is_response,
1153 | &need_desegmentation);
1154 | break;
1155 |
1156 | case SSH_VERSION_22:
1157 | offset = ssh_dissect_ssh2(tvb, pinfo, global_data,
1158 | offset, ssh_tree, is_response,
1159 | &need_desegmentation);
1160 | break;
1161 | }
1162 | }
1163 |
1164 | if (need_desegmentation)
1165 | return tvb_captured_length(tvb);
1166 | if (offset <= last_offset) {
1167 | /* XXX - add an expert info in the function
1168 | that decrements offset */
1169 | break;
1170 | }
1171 | }
1172 |
1173 | col_prepend_fstr(pinfo->cinfo, COL_INFO, "%s: ", is_response ? "Server" : "Client");
1174 | ti = proto_tree_add_boolean(ssh_tree, hf_ssh_direction, tvb, 0, 0, is_response);
1175 | proto_item_set_generated(ti);
1176 |
1177 | ssh_debug_flush();
1178 |
1179 | return tvb_captured_length(tvb);
1180 | }
1181 |
1182 | static bool_Bool
1183 | dissect_ssh_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
1184 | {
1185 | conversation_t *conversation;
1186 |
1187 | if (tvb_strneql(tvb, 0, "SSH-", 4) != 0) {
1188 | return false0;
1189 | }
1190 |
1191 | conversation = find_or_create_conversation(pinfo);
1192 | conversation_set_dissector(conversation, ssh_handle);
1193 |
1194 | dissect_ssh(tvb, pinfo, tree, data);
1195 |
1196 | return true1;
1197 | }
1198 |
1199 | static int
1200 | ssh_dissect_ssh2(tvbuff_t *tvb, packet_info *pinfo,
1201 | struct ssh_flow_data *global_data,
1202 | int offset, proto_tree *tree, int is_response,
1203 | bool_Bool *need_desegmentation)
1204 | {
1205 | proto_item *ssh2_tree = NULL((void*)0);
1206 | int remain_length;
1207 |
1208 | struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
1209 |
1210 | remain_length = tvb_captured_length_remaining(tvb, offset);
1211 |
1212 | if (PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1213 | ws_debug("SSH: SECOND PASS frame %u", pinfo->num)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 1213, __func__, "SSH: SECOND PASS frame %u", pinfo->num) ; } } while (0);
1214 | }else{
1215 | ws_debug("SSH: FIRST PASS frame %u", pinfo->num)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 1215, __func__, "SSH: FIRST PASS frame %u", pinfo->num); } } while (0);
1216 | }
1217 |
1218 | while(remain_length>0){
1219 | int last_offset = offset;
1220 | if (tree) {
1221 | wmem_strbuf_t *title = wmem_strbuf_new(pinfo->pool, "SSH Version 2");
1222 |
1223 | if (peer_data->enc || peer_data->mac || peer_data->comp) {
1224 | wmem_strbuf_append_printf(title, " (");
1225 | if (peer_data->enc)
1226 | wmem_strbuf_append_printf(title, "encryption:%s%s",
1227 | peer_data->enc,
1228 | peer_data->mac || peer_data->comp
1229 | ? " " : "");
1230 | if (peer_data->mac)
1231 | wmem_strbuf_append_printf(title, "mac:%s%s",
1232 | peer_data->mac,
1233 | peer_data->comp ? " " : "");
1234 | if (peer_data->comp)
1235 | wmem_strbuf_append_printf(title, "compression:%s",
1236 | peer_data->comp);
1237 | wmem_strbuf_append_printf(title, ")");
1238 | }
1239 |
1240 | ssh2_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_ssh2, NULL((void*)0), wmem_strbuf_get_str(title));
1241 | }
1242 | ws_noisy("....ssh_dissect_ssh2[%c]: frame_key_start=%d, pinfo->num=%d, frame_key_end=%d, offset=%d, frame_key_end_offset=%d ", is_response==SERVER_PEER_DATA?'S':'C', peer_data->frame_key_start, pinfo->num, peer_data->frame_key_end, offset, peer_data->frame_key_end_offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 1242, __func__, "....ssh_dissect_ssh2[%c]: frame_key_start=%d, pinfo->num=%d, frame_key_end=%d, offset=%d, frame_key_end_offset=%d " , is_response==1?'S':'C', peer_data->frame_key_start, pinfo ->num, peer_data->frame_key_end, offset, peer_data-> frame_key_end_offset); } } while (0);
1243 | if ((peer_data->frame_key_start == 0) ||
1244 | ((peer_data->frame_key_start <= pinfo->num) &&
1245 | ((peer_data->frame_key_end == 0) || (pinfo->num < peer_data->frame_key_end) ||
1246 | ((pinfo->num == peer_data->frame_key_end) && (offset < peer_data->frame_key_end_offset))))) {
1247 | offset = ssh_dissect_key_exchange(tvb, pinfo, global_data,
1248 | offset, ssh2_tree, is_response,
1249 | need_desegmentation);
1250 |
1251 | if (!*need_desegmentation) {
1252 | ssh_get_packet_info(pinfo, is_response);
1253 | }else{
1254 | break;
1255 | }
1256 | } else {
1257 | if(!*need_desegmentation){
1258 | offset = ssh_try_dissect_encrypted_packet(tvb, pinfo,
1259 | &global_data->peer_data[is_response], offset, ssh2_tree);
1260 | if (pinfo->desegment_len) {
1261 | break;
1262 | }
1263 | }else{
1264 | break;
1265 | }
1266 | }
1267 |
1268 | if (ssh2_tree) {
1269 | proto_item_set_len(ssh2_tree, offset - last_offset);
1270 | }
1271 |
1272 | remain_length = tvb_captured_length_remaining(tvb, offset);
1273 | }
1274 |
1275 | return offset;
1276 | }
1277 | static int
1278 | ssh_dissect_ssh1(tvbuff_t *tvb, packet_info *pinfo,
1279 | struct ssh_flow_data *global_data,
1280 | int offset, proto_tree *tree, int is_response,
1281 | bool_Bool *need_desegmentation)
1282 | {
1283 | unsigned plen, padding_length, len;
1284 | uint8_t msg_code;
1285 | unsigned remain_length;
1286 |
1287 | proto_item *ssh1_tree;
1288 |
1289 | struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
1290 |
1291 | ssh1_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_ssh1, NULL((void*)0), "SSH Version 1");
1292 |
1293 | /*
1294 | * We use "tvb_ensure_captured_length_remaining()" to make sure there
1295 | * actually *is* data remaining.
1296 | *
1297 | * This means we're guaranteed that "remain_length" is positive.
1298 | */
1299 | remain_length = tvb_ensure_captured_length_remaining(tvb, offset);
1300 | /*
1301 | * Can we do reassembly?
1302 | */
1303 | if (ssh_desegment && pinfo->can_desegment) {
1304 | /*
1305 | * Yes - would an SSH header starting at this offset be split
1306 | * across segment boundaries?
1307 | */
1308 | if (remain_length < 4) {
1309 | /*
1310 | * Yes. Tell the TCP dissector where the data for
1311 | * this message starts in the data it handed us and
1312 | * that we need "some more data." Don't tell it
1313 | * exactly how many bytes we need because if/when we
1314 | * ask for even more (after the header) that will
1315 | * break reassembly.
1316 | */
1317 | pinfo->desegment_offset = offset;
1318 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
1319 | *need_desegmentation = true1;
1320 | return offset;
1321 | }
1322 | }
1323 | plen = tvb_get_ntohl(tvb, offset) ;
1324 |
1325 | /*
1326 | * Amount of random padding.
1327 | *
1328 | * This is between 1 and 8; if the length is a multiple of 8,
1329 | * there are 8 bytes of padding, not 1 byte.
1330 | *
1331 | * That means this calculation is correct; do not use either
1332 | * WS_ROUNDUP_8() or WS_PADDING_TO_8() here.
1333 | */
1334 | padding_length = 8 - plen%8;
1335 |
1336 |
1337 | if (ssh_desegment && pinfo->can_desegment) {
1338 | if (plen+4+padding_length > remain_length) {
1339 | pinfo->desegment_offset = offset;
1340 | pinfo->desegment_len = plen+padding_length - remain_length;
1341 | *need_desegmentation = true1;
1342 | return offset;
1343 | }
1344 | }
1345 |
1346 | if (plen >= SSH_MAX_PACKET_LEN32768) {
1347 | if (ssh1_tree && plen > 0) {
1348 | proto_tree_add_uint_format(ssh1_tree, hf_ssh_packet_length, tvb,
1349 | offset, 4, plen, "Overly large length %x", plen);
1350 | }
1351 | plen = remain_length-4-padding_length;
1352 | } else {
1353 | if (ssh1_tree && plen > 0) {
1354 | proto_tree_add_uint(ssh1_tree, hf_ssh_packet_length, tvb,
1355 | offset, 4, plen);
1356 | }
1357 | }
1358 | offset+=4;
1359 | /* padding length */
1360 |
1361 | proto_tree_add_uint(ssh1_tree, hf_ssh_padding_length, tvb,
1362 | offset, padding_length, padding_length);
1363 | offset += padding_length;
1364 |
1365 | /* msg_code */
1366 | if ((peer_data->frame_key_start == 0) ||
1367 | ((peer_data->frame_key_start >= pinfo->num) && (pinfo->num <= peer_data->frame_key_end))) {
1368 |
1369 | proto_tree_add_item_ret_uint8(ssh1_tree, hf_ssh_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000, &msg_code);
1370 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1371 | val_to_str(pinfo->pool, msg_code, ssh1_msg_vals, "Unknown (%u)"));
1372 | offset += 1;
1373 | len = plen -1;
1374 | if (!pinfo->fd->visited) {
1375 | if (peer_data->frame_key_start == 0)
1376 | peer_data->frame_key_start = pinfo->num;
1377 | peer_data->frame_key_end = pinfo->num;
1378 | }
1379 | } else {
1380 | len = plen;
1381 | col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Encrypted packet (len=%d)", len);
1382 | }
1383 | /* payload */
1384 | if (ssh1_tree) {
1385 | proto_tree_add_item(ssh1_tree, hf_ssh_payload,
1386 | tvb, offset, len, ENC_NA0x00000000);
1387 | }
1388 | offset += len;
1389 |
1390 | return offset;
1391 | }
1392 |
1393 | static int
1394 | ssh_tree_add_mpint(tvbuff_t *tvb, int offset, proto_tree *tree,
1395 | int hf_ssh_mpint_selection)
1396 | {
1397 | unsigned len = tvb_get_ntohl(tvb, offset);
1398 | proto_tree_add_uint(tree, hf_ssh_mpint_length, tvb,
1399 | offset, 4, len);
1400 | offset+=4;
1401 | proto_tree_add_item(tree, hf_ssh_mpint_selection,
1402 | tvb, offset, len, ENC_NA0x00000000);
1403 | return 4+len;
1404 | }
1405 |
1406 | static int
1407 | ssh_tree_add_string(tvbuff_t *tvb, int offset, proto_tree *tree,
1408 | int hf_ssh_string, int hf_ssh_string_length)
1409 | {
1410 | unsigned len = tvb_get_ntohl(tvb, offset);
1411 | proto_tree_add_uint(tree, hf_ssh_string_length, tvb,
1412 | offset, 4, len);
1413 | offset+=4;
1414 | proto_tree_add_item(tree, hf_ssh_string,
1415 | tvb, offset, len, ENC_NA0x00000000);
1416 | return 4+len;
1417 | }
1418 |
1419 | static unsigned
1420 | ssh_tree_add_hostkey(tvbuff_t *tvb, packet_info* pinfo, int offset, proto_tree *parent_tree,
1421 | const char *tree_name, int ett_idx,
1422 | struct ssh_flow_data *global_data)
1423 | {
1424 | proto_tree *tree = NULL((void*)0);
1425 | proto_item *ti;
1426 | int last_offset;
1427 | int remaining_len;
1428 | unsigned key_len, type_len;
1429 | char* key_type;
1430 | char *tree_title;
1431 |
1432 | last_offset = offset;
1433 |
1434 | key_len = tvb_get_ntohl(tvb, offset);
1435 | offset += 4;
1436 |
1437 | /* Read the key type before creating the tree so we can append it as info. */
1438 | type_len = tvb_get_ntohl(tvb, offset);
1439 | offset += 4;
1440 | key_type = (char *) tvb_get_string_enc(pinfo->pool, tvb, offset, type_len, ENC_ASCII0x00000000|ENC_NA0x00000000);
1441 |
1442 | tree_title = wmem_strdup_printf(pinfo->pool, "%s (type: %s)", tree_name, key_type);
1443 | tree = proto_tree_add_subtree(parent_tree, tvb, last_offset, key_len + 4, ett_idx, NULL((void*)0),
1444 | tree_title);
1445 |
1446 | ti = proto_tree_add_uint(tree, hf_ssh_hostkey_length, tvb, last_offset, 4, key_len);
1447 |
1448 | // server host key (K_S / Q)
1449 | uint8_t *data = (uint8_t *)tvb_memdup(pinfo->pool, tvb, last_offset + 4, key_len);
1450 | if (global_data) {
1451 | // Reset array while REKEY: sanitize server host key blob
1452 | global_data->kex_server_host_key_blob = wmem_array_new(wmem_file_scope(), 1);
1453 | ssh_hash_buffer_put_string(global_data->kex_server_host_key_blob, data, key_len);
1454 | }
1455 |
1456 | last_offset += 4;
1457 | proto_tree_add_uint(tree, hf_ssh_hostkey_type_length, tvb, last_offset, 4, type_len);
1458 | proto_tree_add_string(tree, hf_ssh_hostkey_type, tvb, offset, type_len, key_type);
1459 | offset += type_len;
1460 |
1461 | if (0 == strcmp(key_type, "ssh-rsa")) {
1462 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_rsa_e);
1463 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_rsa_n);
1464 | } else if (0 == strcmp(key_type, "ssh-dss")) {
1465 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_p);
1466 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_q);
1467 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_g);
1468 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_y);
1469 | } else if (g_str_has_prefix(key_type, "ecdsa-sha2-")(__builtin_constant_p ("ecdsa-sha2-")? __extension__ ({ const char * const __str = (key_type); const char * const __prefix = ("ecdsa-sha2-"); gboolean __result = (0); if (__str == ((void *)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix); else { const size_t __str_len = strlen (( (__str) + !(__str))); const size_t __prefix_len = strlen (((__prefix ) + !(__prefix))); if (__str_len >= __prefix_len) __result = memcmp (((__str) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len ) == 0; } __result; }) : (g_str_has_prefix) (key_type, "ecdsa-sha2-" ) )) {
1470 | offset += ssh_tree_add_string(tvb, offset, tree,
1471 | hf_ssh_hostkey_ecdsa_curve_id, hf_ssh_hostkey_ecdsa_curve_id_length);
1472 | offset += ssh_tree_add_string(tvb, offset, tree,
1473 | hf_ssh_hostkey_ecdsa_q, hf_ssh_hostkey_ecdsa_q_length);
1474 | } else if (g_str_has_prefix(key_type, "ssh-ed")(__builtin_constant_p ("ssh-ed")? __extension__ ({ const char * const __str = (key_type); const char * const __prefix = ("ssh-ed" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (key_type, "ssh-ed") )) {
1475 | offset += ssh_tree_add_string(tvb, offset, tree,
1476 | hf_ssh_hostkey_eddsa_key, hf_ssh_hostkey_eddsa_key_length);
1477 | } else {
1478 | remaining_len = key_len - (type_len + 4);
1479 | proto_tree_add_item(tree, hf_ssh_hostkey_data, tvb, offset, remaining_len, ENC_NA0x00000000);
1480 | offset += remaining_len;
1481 | }
1482 |
1483 | if (last_offset + (int)key_len != offset) {
1484 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but hostkey length is %d bytes", offset - last_offset, key_len);
1485 | }
1486 | return 4+key_len;
1487 | }
1488 |
1489 | static unsigned
1490 | ssh_tree_add_hostsignature(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *parent_tree,
1491 | const char *tree_name, int ett_idx,
1492 | struct ssh_flow_data *global_data)
1493 | {
1494 | (void)global_data;
1495 | proto_tree *tree = NULL((void*)0);
1496 | proto_item* ti = NULL((void*)0);
1497 | int last_offset;
1498 | int offset0 = offset;
1499 | unsigned sig_len, type_len, data_len;
1500 | const char* sig_type;
1501 | char *tree_title;
1502 |
1503 | last_offset = offset;
1504 |
1505 | sig_len = tvb_get_ntohl(tvb, offset);
1506 | offset += 4;
1507 |
1508 | /* Read the signature type before creating the tree so we can append it as info. */
1509 | type_len = tvb_get_ntohl(tvb, offset);
1510 | offset += 4;
1511 | sig_type = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset, type_len, ENC_ASCII0x00000000|ENC_NA0x00000000);
1512 |
1513 | tree_title = wmem_strdup_printf(pinfo->pool, "%s (type: %s)", tree_name, sig_type);
1514 | tree = proto_tree_add_subtree(parent_tree, tvb, last_offset, sig_len + 4, ett_idx, NULL((void*)0),
1515 | tree_title);
1516 |
1517 | ti = proto_tree_add_uint(tree, hf_ssh_hostsig_length, tvb, last_offset, 4, sig_len);
1518 |
1519 | last_offset += 4;
1520 | proto_tree_add_uint(tree, hf_ssh_hostsig_type_length, tvb, last_offset, 4, type_len);
1521 | proto_tree_add_string(tree, hf_ssh_hostsig_type, tvb, offset, type_len, sig_type);
1522 | offset += type_len;
1523 |
1524 | if (0 == strcmp(sig_type, "ssh-rsa")) {
1525 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostsig_rsa);
1526 | } else if (0 == strcmp(sig_type, "ssh-dss")) {
1527 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostsig_dsa);
1528 | // } else if (g_str_has_prefix(sig_type, "ecdsa-sha2-")) {
1529 | // offset += ssh_tree_add_string(tvb, offset, tree,
1530 | // hf_ssh_hostkey_ecdsa_curve_id, hf_ssh_hostkey_ecdsa_curve_id_length);
1531 | // ssh_tree_add_string(tvb, offset, tree,
1532 | // hf_ssh_hostkey_ecdsa_q, hf_ssh_hostkey_ecdsa_q_length);
1533 | // } else if (g_str_has_prefix(sig_type, "ssh-ed")) {
1534 | // ssh_tree_add_string(tvb, offset, tree,
1535 | // hf_ssh_hostkey_eddsa_key, hf_ssh_hostkey_eddsa_key_length);
1536 | } else {
1537 | proto_tree_add_item_ret_uint(tree, hf_ssh_hostsig_data_length, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &data_len);
1538 | offset += 4;
1539 | proto_tree_add_item(tree, hf_ssh_hostsig_data, tvb, offset, data_len, ENC_NA0x00000000);
1540 | offset += data_len;
1541 | }
1542 |
1543 | if(offset-offset0!=(int)(4+sig_len)){
1544 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", offset-offset0, sig_len);
1545 | }
1546 |
1547 | return 4+sig_len;
1548 | }
1549 |
1550 | static int
1551 | ssh_dissect_key_exchange(tvbuff_t *tvb, packet_info *pinfo,
1552 | struct ssh_flow_data *global_data,
1553 | int offset, proto_tree *tree, int is_response,
1554 | bool_Bool *need_desegmentation)
1555 | {
1556 | unsigned plen, len;
1557 | uint8_t padding_length;
1558 | unsigned remain_length;
1559 | int last_offset = offset;
1560 | unsigned msg_code;
1561 |
1562 | proto_item *ti;
1563 | proto_item *key_ex_tree = NULL((void*)0);
1564 | const char *key_ex_title = "Key Exchange";
1565 |
1566 | struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
1567 |
1568 | if (PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1569 | ws_debug("SSH: SECOND PASS dissecting keys -for Wireshark UI- frame %u", pinfo->num)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 1569, __func__, "SSH: SECOND PASS dissecting keys -for Wireshark UI- frame %u" , pinfo->num); } } while (0);
1570 | }
1571 | /* This is after the identification string (Protocol Version Exchange)
1572 | * but before the first key exchange has completed, so we expect the SSH
1573 | * packets to be unencrypted, and to contain KEX related messages.
1574 | *
1575 | * XXX - Without the "strict kex" extension, other messages are allowed;
1576 | * most don't make sense (SSH_MSG_IGNORE and SSH_MSG_DEBUG might), but we
1577 | * could dissect them and add them to the tree.
1578 | *
1579 | * XXX - Could we combine this with ssh_dissect_decrypted_packet, with a
1580 | * flag to indicate whether we're before the initial key exchange?
1581 | */
1582 |
1583 | /*
1584 | * We use "tvb_ensure_captured_length_remaining()" to make sure there
1585 | * actually *is* data remaining.
1586 | *
1587 | * This means we're guaranteed that "remain_length" is positive.
1588 | */
1589 | remain_length = tvb_ensure_captured_length_remaining(tvb, offset);
1590 | /*
1591 | * Can we do reassembly?
1592 | */
1593 | if (ssh_desegment && pinfo->can_desegment) {
1594 | /*
1595 | * Yes - would an SSH header starting at this offset
1596 | * be split across segment boundaries?
1597 | */
1598 | if (remain_length < 4) {
1599 | /*
1600 | * Yes. Tell the TCP dissector where the data for
1601 | * this message starts in the data it handed us and
1602 | * that we need "some more data." Don't tell it
1603 | * exactly how many bytes we need because if/when we
1604 | * ask for even more (after the header) that will
1605 | * break reassembly.
1606 | */
1607 | pinfo->desegment_offset = offset;
1608 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
1609 | *need_desegmentation = true1;
1610 | return offset;
1611 | }
1612 | }
1613 | plen = tvb_get_ntohl(tvb, offset) ;
1614 |
1615 | if (ssh_desegment && pinfo->can_desegment) {
1616 | if (plen +4 > remain_length) {
1617 | pinfo->desegment_offset = offset;
1618 | pinfo->desegment_len = plen+4 - remain_length;
1619 | *need_desegmentation = true1;
1620 | return offset;
1621 | }
1622 | }
1623 | /*
1624 | * Need to check plen > 0x80000000 here
1625 | */
1626 |
1627 | ti = proto_tree_add_uint(tree, hf_ssh_packet_length, tvb,
1628 | offset, 4, plen);
1629 | if (plen >= SSH_MAX_PACKET_LEN32768) {
1630 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Overly large number %d", plen);
1631 | plen = remain_length-4;
1632 |
1633 | /* XXX - Mark as Continuation Data and return without incrementing?
1634 | * Or do so *before* using this length to desegment? */
1635 | }
1636 | offset+=4;
1637 |
1638 | ssh_packet_info_t *packet = ssh_get_packet_info(pinfo, is_response);
1639 |
1640 | int record_id = tvb_raw_offset(tvb)+offset;
1641 | ssh_message_info_t *message;
1642 | message = ssh_get_message(pinfo, record_id);
1643 | if (!message) {
1644 | message = wmem_new0(wmem_file_scope(), ssh_message_info_t)((ssh_message_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (ssh_message_info_t)));
1645 | message->sequence_number = peer_data->sequence_number++;
1646 | message->id = record_id;
1647 | /* No data, and no MAC, as is this is before encryption starts. */
1648 | message->next = NULL((void*)0);
1649 | ssh_debug_printf("%s->sequence_number++ > %d\n", is_response?"server":"client", peer_data->sequence_number);
1650 |
1651 | ssh_message_info_t **pmessage = &packet->messages;
1652 | while(*pmessage){
1653 | pmessage = &(*pmessage)->next;
1654 | }
1655 | *pmessage = message;
1656 | }
1657 |
1658 | /* padding length */
1659 | padding_length = tvb_get_uint8(tvb, offset);
1660 | proto_tree_add_uint(tree, hf_ssh_padding_length, tvb, offset, 1, padding_length);
1661 | offset += 1;
1662 |
1663 | if (global_data->kex)
1664 | key_ex_title = wmem_strdup_printf(pinfo->pool, "%s (method:%s)", key_ex_title, global_data->kex);
1665 | key_ex_tree = proto_tree_add_subtree(tree, tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), key_ex_title);
1666 |
1667 | /* msg_code */
1668 | msg_code = tvb_get_uint8(tvb, offset);
1669 |
1670 | if (msg_code >= 30 && msg_code < 40) {
1671 | offset = global_data->kex_specific_dissector(msg_code, tvb, pinfo,
1672 | offset, key_ex_tree, global_data);
1673 | } else {
1674 | proto_tree_add_item(key_ex_tree, hf_ssh2_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1675 | offset += 1;
1676 |
1677 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1678 | val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
1679 |
1680 | /* 16 bytes cookie */
1681 | switch(msg_code)
1682 | {
1683 | case SSH_MSG_KEXINIT20:
1684 | offset = ssh_dissect_key_init(tvb, pinfo, offset, key_ex_tree, is_response, global_data);
1685 | if ((peer_data->frame_key_start == 0) && (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))) {
1686 | peer_data->frame_key_start = pinfo->num;
1687 | }
1688 | break;
1689 | case SSH_MSG_NEWKEYS21:
1690 | if (peer_data->frame_key_end == 0) {
1691 | peer_data->frame_key_end = pinfo->num;
1692 | peer_data->frame_key_end_offset = offset;
1693 |
1694 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1695 | /* "After sending or receiving a SSH2_MSG_NEWKEYS message,
1696 | * reset the packet sequence number to zero. This behaviour
1697 | * persists for the duration of the connection (i.e. not
1698 | * just the first SSH2_MSG_NEWKEYS) */
1699 | if (global_data->ext_kex_strict) {
1700 | peer_data->sequence_number = 0;
1701 | ssh_debug_printf("%s->sequence_number reset to 0 (Strict KEX)\n", is_response?"server":"client");
1702 | }
1703 | }
1704 |
1705 | // the client sent SSH_MSG_NEWKEYS
1706 | if (!is_response) {
1707 | ssh_debug_printf("Activating new keys for CLIENT => SERVER\n");
1708 | ssh_decryption_setup_cipher(&global_data->peer_data[CLIENT_PEER_DATA0], &global_data->new_keys[0], &global_data->new_keys[2]);
1709 | ssh_decryption_setup_mac(&global_data->peer_data[CLIENT_PEER_DATA0], &global_data->new_keys[4]);
1710 | }else{
1711 | ssh_debug_printf("Activating new keys for SERVER => CLIENT\n");
1712 | ssh_decryption_setup_cipher(&global_data->peer_data[SERVER_PEER_DATA1], &global_data->new_keys[1], &global_data->new_keys[3]);
1713 | ssh_decryption_setup_mac(&global_data->peer_data[SERVER_PEER_DATA1], &global_data->new_keys[5]);
1714 | }
1715 | }
1716 | break;
1717 | }
1718 | }
1719 |
1720 | len = plen+4-padding_length-(offset-last_offset);
1721 | if (len > 0) {
1722 | proto_tree_add_item(key_ex_tree, hf_ssh_payload, tvb, offset, len, ENC_NA0x00000000);
1723 | }
1724 | offset += len;
1725 |
1726 | /* padding */
1727 | proto_tree_add_item(tree, hf_ssh_padding_string, tvb, offset, padding_length, ENC_NA0x00000000);
1728 | offset+= padding_length;
1729 | ti = proto_tree_add_uint(tree, hf_ssh_seq_num, tvb, offset, 0, message->sequence_number);
1730 | proto_item_set_generated(ti);
1731 |
1732 | return offset;
1733 | }
1734 |
1735 | static int ssh_dissect_kex_dh(uint8_t msg_code, tvbuff_t *tvb,
1736 | packet_info *pinfo, int offset, proto_tree *tree,
1737 | struct ssh_flow_data *global_data)
1738 | {
1739 | proto_tree_add_item(tree, hf_ssh2_kex_dh_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1740 | offset += 1;
1741 |
1742 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1743 | val_to_str(pinfo->pool, msg_code, ssh2_kex_dh_msg_vals, "Unknown (%u)"));
1744 |
1745 | switch (msg_code) {
1746 | case SSH_MSG_KEXDH_INIT30:
1747 | // e (client ephemeral key public part)
1748 | if (!ssh_read_e(tvb, offset, global_data)) {
1749 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1750 | "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1751 | }
1752 |
1753 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_e);
1754 | break;
1755 |
1756 | case SSH_MSG_KEXDH_REPLY31:
1757 | offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key",
1758 | ett_key_exchange_host_key, global_data);
1759 |
1760 | // f (server ephemeral key public part), K_S (host key)
1761 | if (!ssh_read_f(tvb, offset, global_data)) {
1762 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1763 | "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1764 | }
1765 | ssh_choose_enc_mac(global_data);
1766 | ssh_keylog_hash_write_secret(global_data, pinfo->pool);
1767 |
1768 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_f);
1769 | offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
1770 | ett_key_exchange_host_sig, global_data);
1771 | break;
1772 | }
1773 |
1774 | return offset;
1775 | }
1776 |
1777 | static int ssh_dissect_kex_dh_gex(uint8_t msg_code, tvbuff_t *tvb,
1778 | packet_info *pinfo, int offset, proto_tree *tree,
1779 | struct ssh_flow_data *global_data)
1780 | {
1781 | proto_tree_add_item(tree, hf_ssh2_kex_dh_gex_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1782 | offset += 1;
1783 |
1784 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1785 | val_to_str(pinfo->pool, msg_code, ssh2_kex_dh_gex_msg_vals, "Unknown (%u)"));
1786 |
1787 | switch (msg_code) {
1788 | case SSH_MSG_KEX_DH_GEX_REQUEST_OLD30:
1789 | proto_tree_add_item(tree, hf_ssh_dh_gex_nbits, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1790 | offset += 4;
1791 | break;
1792 |
1793 | case SSH_MSG_KEX_DH_GEX_GROUP31:
1794 | // p (Group modulo)
1795 | global_data->kex_gex_p = ssh_read_mpint(tvb, offset);
1796 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_gex_p);
1797 | // g (Group generator)
1798 | global_data->kex_gex_g = ssh_read_mpint(tvb, offset);
1799 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_gex_g);
1800 | break;
1801 |
1802 | case SSH_MSG_KEX_DH_GEX_INIT32:
1803 | // e (Client public key)
1804 | if (!ssh_read_e(tvb, offset, global_data)) {
1805 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1806 | "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1807 | }
1808 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_e);
1809 | break;
1810 |
1811 | case SSH_MSG_KEX_DH_GEX_REPLY33:
1812 | offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key",
1813 | ett_key_exchange_host_key, global_data);
1814 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1815 | ssh_read_f(tvb, offset, global_data);
1816 | // f (server ephemeral key public part), K_S (host key)
1817 | ssh_choose_enc_mac(global_data);
1818 | ssh_keylog_hash_write_secret(global_data, pinfo->pool);
1819 | }
1820 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_f);
1821 | offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
1822 | ett_key_exchange_host_sig, global_data);
1823 | break;
1824 |
1825 | case SSH_MSG_KEX_DH_GEX_REQUEST34:{
1826 |
1827 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1828 | ssh_hash_buffer_put_uint32(global_data->kex_gex_bits_min, tvb_get_ntohl(tvb, offset));
1829 | }
1830 | proto_tree_add_item(tree, hf_ssh_dh_gex_min, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1831 | offset += 4;
1832 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1833 | ssh_hash_buffer_put_uint32(global_data->kex_gex_bits_req, tvb_get_ntohl(tvb, offset));
1834 | }
1835 | proto_tree_add_item(tree, hf_ssh_dh_gex_nbits, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1836 | offset += 4;
1837 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1838 | ssh_hash_buffer_put_uint32(global_data->kex_gex_bits_max, tvb_get_ntohl(tvb, offset));
1839 | }
1840 | proto_tree_add_item(tree, hf_ssh_dh_gex_max, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1841 | offset += 4;
1842 | break;
1843 | }
1844 | }
1845 |
1846 | return offset;
1847 | }
1848 |
1849 | static int
1850 | ssh_dissect_kex_ecdh(uint8_t msg_code, tvbuff_t *tvb,
1851 | packet_info *pinfo, int offset, proto_tree *tree,
1852 | struct ssh_flow_data *global_data)
1853 | {
1854 | proto_tree_add_item(tree, hf_ssh2_kex_ecdh_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1855 | offset += 1;
1856 |
1857 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1858 | val_to_str(pinfo->pool, msg_code, ssh2_kex_ecdh_msg_vals, "Unknown (%u)"));
1859 |
1860 | switch (msg_code) {
1861 | case SSH_MSG_KEX_ECDH_INIT30:
1862 | if (!ssh_read_e(tvb, offset, global_data)) {
1863 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1864 | "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1865 | }
1866 |
1867 | offset += ssh_tree_add_string(tvb, offset, tree, hf_ssh_ecdh_q_c, hf_ssh_ecdh_q_c_length);
1868 | break;
1869 |
1870 | case SSH_MSG_KEX_ECDH_REPLY31:
1871 | offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key",
1872 | ett_key_exchange_host_key, global_data);
1873 |
1874 | if (!ssh_read_f(tvb, offset, global_data)){
1875 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1876 | "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1877 | }
1878 |
1879 | ssh_choose_enc_mac(global_data);
1880 | ssh_keylog_hash_write_secret(global_data, pinfo->pool);
1881 |
1882 | offset += ssh_tree_add_string(tvb, offset, tree, hf_ssh_ecdh_q_s, hf_ssh_ecdh_q_s_length);
1883 | offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
1884 | ett_key_exchange_host_sig, global_data);
1885 | break;
1886 | }
1887 |
1888 | return offset;
1889 | }
1890 |
1891 | /*
1892 | * === Hybrid KEX Dissection Strategy for Post-Quantum algorithms ===
1893 | *
1894 | * This 3 functions:
1895 | *
1896 | * - ssh_dissect_kex_pq_hybrid()
1897 | * - ssh_read_e_pq()
1898 | * - ssh_read_f_pq()
1899 | *
1900 | * handles the dissection of server key exchange payloads for the
1901 | * post-quantum hybrid key exchange method:
1902 | * - sntrup761x25519-sha512
1903 | * - mlkem768x25519-sha256
1904 | * - mlkem768nistp256-sha256
1905 | * - mlkem1024nistp384-sha384
1906 | *
1907 | * /!\ Rationale for implementation approach:
1908 | *
1909 | * SSH encodes the server's ephemeral key (`Q_S`) as a single SSH `string`
1910 | * which contains both the post-quantum KEM ciphertext (from sntrup761 / mlkem768
1911 | * / mlkem1024) and the traditional (Curve25519 / nistp256 / nistp384) public key.
1912 | * Therefore, we parse one string
1913 | *
1914 | * sntrup761x25519:
1915 | * - PQ client keyshare: 1158 bytes
1916 | * - PQ server ciphertext: 1039 bytes
1917 | * - Curve25519 pubkey: 32 bytes
1918 | *
1919 | * mlkem768x25519:
1920 | * - PQ client keyshare: 1184 bytes
1921 | * - PQ server ciphertext: 1088 bytes
1922 | * - Curve25519 pubkey: 32 bytes
1923 | *
1924 | * mlkem768nistp256:
1925 | * - PQ client keyshare: 1184 bytes
1926 | * - PQ server ciphertext: 1088 bytes
1927 | * - nistp256 pubkey: 65 bytes
1928 | *
1929 | * mlkem1024nistp384:
1930 | * - PQ client keyshare: 1568 bytes
1931 | * - PQ server ciphertext: 1568 bytes
1932 | * - nistp384 pubkey: 97 bytes
1933 | *
1934 | *
1935 | * This matches how OpenSSH serializes the hybrid key material, and allows Wireshark
1936 | * to compute the correct key exchange hash and derive session keys accurately.
1937 | *
1938 | * /!\ This design is necessary for live decryption support in Wireshark and TShark.
1939 | *
1940 | * References:
1941 | * - RFC 4253: The SSH Transport Layer Protocol
1942 | * - Section 6: string encoding format
1943 | * - Section 7.2: Key derivation
1944 | * - RFC 8731: Secure Shell (SSH) Key Exchange Method using Curve25519
1945 | * - Internet-Draft on sntrup761x25519-sha512
1946 | * - https://datatracker.ietf.org/doc/draft-ietf-sshm-ntruprime-ssh/
1947 | * - Internet-Draft on mlkem768x25519-sha256
1948 | * - https://datatracker.ietf.org/doc/draft-ietf-sshm-mlkem-hybrid-kex/
1949 | * - OpenSSH Hybrid KEM Implementation (sntrup761x25519-sha512 / mlkem768x25519-sha256)
1950 | * - https://github.com/openssh/openssh-portable/blob/master/kexc25519.c
1951 | * - https://github.com/openssh/openssh-portable/blob/master/kexsntrup761x25519.c
1952 | * - https://github.com/openssh/openssh-portable/blob/master/kexmlkem768x25519.c
1953 | * - AsyncSSH Hybrid KEM Implementation (sntrup761x25519-sha512 / mlkem768x25519-sha256 / mlkem768nistp256-sha256 / mlkem1024nistp384-sha384)
1954 | * - https://github.com/ronf/asyncssh/blob/develop/asyncssh/kex_dh.py
1955 | *
1956 | */
1957 |
1958 | static int
1959 | ssh_dissect_kex_pq_hybrid(uint8_t msg_code, tvbuff_t *tvb,
1960 | packet_info *pinfo, int offset, proto_tree *tree,
1961 | struct ssh_flow_data *global_data)
1962 | {
1963 | // SSH PACKET STRUCTURE RFC4253 (e.g. packet of 1228 bytes payload)
1964 | // [00 00 04 cc] → ssh payload blob length field in tcp packet (e.g. 1228=0x04cc): 4 bytes
1965 | // [1228 bytes of SSH PAYLOAD BLOB] → ssh payload blob field: 1228 bytes
1966 |
1967 | // Add the message code byte (first field in packet) to the GUI tree.
1968 | proto_tree_add_item(tree, hf_ssh2_kex_hybrid_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1969 | offset += 1; // Move offset past the msg_code byte.
1970 |
1971 | // Add a descriptive string to Wireshark's "Info" column.
1972 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1973 | val_to_str(pinfo->pool, msg_code, ssh2_kex_hybrid_msg_vals, "Unknown (%u)"));
1974 |
1975 | const char *kex_name = global_data->kex;
1976 |
1977 | if (msg_code == SSH_MSG_KEX_HYBRID_INIT30) {
1 | Assuming 'msg_code' is not equal to SSH_MSG_KEX_HYBRID_INIT | →
2 | ← | Taking false branch | →
1978 | // Print warning when PQ hybrid KEM is detected in KEX
1979 | // This implementation currently rely on SHARED_SECRET only and do not work with PRIVATE_KEY
1980 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1981 | ws_warning("POST-QUANTUM KEX_HYBRID detected: KEX = %s", kex_name)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_WARNING, "epan/dissectors/packet-ssh.c" , 1981, __func__, "POST-QUANTUM KEX_HYBRID detected: KEX = %s" , kex_name); } } while (0);
1982 | ws_warning("SHARED_SECRET decryption is supported - PRIVATE_KEY decryption is not supported")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_WARNING, "epan/dissectors/packet-ssh.c" , 1982, __func__, "SHARED_SECRET decryption is supported - PRIVATE_KEY decryption is not supported" ); } } while (0);
1983 | }
1984 | // Print noisy debug info
1985 | ws_noisy(">>> HYBRID KEM: msg_code = %u, offset = %d, kex = %s", msg_code, offset, kex_name)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 1985, __func__, ">>> HYBRID KEM: msg_code = %u, offset = %d, kex = %s" , msg_code, offset, kex_name); } } while (0);
1986 | }
1987 |
1988 | switch (msg_code) {
3 | ← | Control jumps to 'case 31:' at line 2076 | →
1989 |
1990 | // Client Key Exchange INIT
1991 | case SSH_MSG_KEX_HYBRID_INIT30: {
1992 |
1993 | // SNTRUP761X25519: RFC4253 SSH "string" (binary-encoded structure)
1994 | // [00 00 04 a6] → length = 1190 (0x04a6)
1995 | // [1158 bytes PQ blob] → sntrup761 encapsulated client key
1996 | // [32 bytes of X25519 pubkey] → ephemeral X25519 public key
1997 |
1998 | // MLKEM768X25519: RFC4253 SSH "string" (binary-encoded structure)
1999 | // [00 00 04 c0] → length = 1216 (0x04c0)
2000 | // [1184 bytes PQ blob] → mlkem768 encapsulated client key
2001 | // [32 bytes of X25519 pubkey] → ephemeral X25519 public key
2002 |
2003 | // MLKEM768NISTP256: RFC4253 SSH "string" (binary-encoded structure)
2004 | // [00 00 04 e1] → length = 1249 (0x04e1)
2005 | // [1184 bytes PQ blob] → mlkem768 encapsulated client key
2006 | // [65 bytes of nistp256 pubkey] → ephemeral nistp256 public key
2007 |
2008 | // MLKEM1024NISTP384: RFC4253 SSH "string" (binary-encoded structure)
2009 | // [00 00 06 81] → length = 1665 (0x0681)
2010 | // [1568 bytes PQ blob] → mlkem1024 encapsulated client key
2011 | // [97 bytes of nistp384 pubkey] → ephemeral nistp384 public key
2012 |
2013 | ws_debug("CLIENT INIT follow offset pointer - absolute offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2013, __func__, "CLIENT INIT follow offset pointer - absolute offset: %d" , offset); } } while (0); // debug trace offset
2014 | int new_offset_client = ssh_read_e_pq(tvb, offset, global_data);
2015 | if (new_offset_client < 0) {
2016 | uint32_t bad_len = tvb_get_ntohl(tvb, offset);
2017 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 4,
2018 | "Invalid PQ client key length: %u", bad_len);
2019 | ws_debug("ExpertInfo: Invalid PQ client key length at offset %d: %u", offset, bad_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2019, __func__, "ExpertInfo: Invalid PQ client key length at offset %d: %u" , offset, bad_len); } } while (0);
2020 |
2021 | return offset + 4;
2022 | ws_debug("CLIENT INIT validate PQ client key length - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2022, __func__, "CLIENT INIT validate PQ client key length - offset: %d" , offset); } } while (0); // debug trace offset
2023 | }
2024 |
2025 | // PQ-hybrid KEMs cannot use ssh_add_tree_string => manual dissection
2026 | // Get PQ blob size
2027 | proto_tree *pq_tree = NULL((void*)0);
2028 | uint32_t hybrid_len;
2029 |
2030 | // Add a subtree for dissecting PQ blob
2031 | proto_tree_add_item_ret_uint(tree, hf_ssh_hybrid_blob_client_len, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &hybrid_len); // add blob length
2032 | ws_debug("CLIENT INIT PQ blob length - pq_len: %d", hybrid_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2032, __func__, "CLIENT INIT PQ blob length - pq_len: %d", hybrid_len ); } } while (0); // debug trace pq_len
2033 | offset += 4; // shift length field
2034 | pq_tree = proto_tree_add_subtree(tree, tvb, offset, hybrid_len, ett_ssh_pqhybrid_client, NULL((void*)0), "Hybrid Key Exchange Blob Client");
2035 | ws_debug("CLIENT INIT add PQ Hybrid subtree - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2035, __func__, "CLIENT INIT add PQ Hybrid subtree - offset: %d" , offset); } } while (0); // debug trace offset
2036 |
2037 | // Make a new tvb for just the PQ hybrid blob string contents
2038 | tvbuff_t *string_tvb = tvb_new_subset_length(tvb, offset, hybrid_len);
2039 |
2040 | uint32_t pq_len;
2041 | uint32_t t_len;
2042 | if (strcmp(kex_name, "sntrup761x25519-sha512") == 0) {
2043 | pq_len = 1158;
2044 | t_len = 32;
2045 | } else if (strcmp(kex_name, "mlkem768x25519-sha256") == 0) {
2046 | pq_len = 1184;
2047 | t_len = 32;
2048 | } else if (strcmp(kex_name, "mlkem768nistp256-sha256") == 0) {
2049 | pq_len = 1184;
2050 | t_len = 65;
2051 | } else if (strcmp(kex_name, "mlkem1024nistp384-sha384") == 0) {
2052 | pq_len = 1568;
2053 | t_len = 97;
2054 | } else {
2055 | DISSECTOR_ASSERT_NOT_REACHED()(proto_report_dissector_bug("%s:%u: failed assertion \"DISSECTOR_ASSERT_NOT_REACHED\"" , "epan/dissectors/packet-ssh.c", 2055));
2056 | break;
2057 | }
2058 |
2059 | if (pq_len + t_len != hybrid_len) {
2060 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 4,
2061 | "Invalid PQ hybrid client key length for %s: %u does not match %u + %u",
2062 | kex_name, hybrid_len, pq_len, t_len);
2063 | } else {
2064 | // Now dissect string inside the blob and add PQ server response and ECDH Q_S to GUI subtree
2065 | proto_tree_add_item(pq_tree, hf_ssh_pq_kem_client, string_tvb, 0, pq_len, ENC_NA0x00000000);
2066 | proto_tree_add_item(pq_tree, hf_ssh_ecdh_q_c, string_tvb, pq_len, t_len, ENC_NA0x00000000);
2067 | }
2068 |
2069 | // retrieve offset from read_f_pq() to shift blob length and consume packet
2070 | offset = new_offset_client;
2071 | ws_debug("CLIENT INIT shift PQ blob - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2071, __func__, "CLIENT INIT shift PQ blob - offset: %d", offset ); } } while (0); // debug trace offset
2072 | break;
2073 | }
2074 |
2075 | // Server Reply Message
2076 | case SSH_MSG_KEX_HYBRID_REPLY31: {
2077 |
2078 | // SNTRUP761X25519: RFC4253 SSH "string" (binary-encoded structure)
2079 | // [00 00 00 33] → host key structure length = 51
2080 | // [00 00 00 0b] → host key alg length = 11
2081 | // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2082 | // [00 00 00 20] → host key length = 32
2083 | // [32 bytes of public key] → public key
2084 | // [00 00 04 2f] → PQ blob length = 1071 (0x042f)
2085 | // [1071 bytes PQ blob] → PQ blob (1039 sntrup761 + 32 x25519)
2086 | // [00 00 00 53] → signature structure length = 83
2087 | // [00 00 00 0b] → signature alg length
2088 | // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2089 | // [00 00 00 40] → signature length
2090 | // [40 bytes signature] → server signature
2091 |
2092 | // MLKEM768X25519: RFC4253 SSH "string" (binary-encoded structure)
2093 | // [00 00 00 33] → host key structure length = 51
2094 | // [00 00 00 0b] → host key alg length = 11
2095 | // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2096 | // [00 00 00 20] → host key length = 32
2097 | // [32 bytes of public key] → public key
2098 | // [00 00 04 60] → PQ blob length = 1120 (0x0460)
2099 | // [1120 bytes PQ blob] → PQ blob (1088 mlkem768 + 32 x25519)
2100 | // [00 00 00 53] → signature structure length = 83
2101 | // [00 00 00 0b] → signature alg length
2102 | // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2103 | // [00 00 00 40] → signature length
2104 | // [40 bytes signature] → server signature
2105 |
2106 | // MLKEM768NISTP256: RFC4253 SSH "string" (binary-encoded structure)
2107 | // [00 00 00 33] → host key structure length = 51
2108 | // [00 00 00 0b] → host key alg length = 11
2109 | // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2110 | // [00 00 00 20] → host key length = 32
2111 | // [32 bytes of public key] → public key
2112 | // [00 00 04 81] → PQ blob length = 1153 (0x0481)
2113 | // [1153 bytes PQ blob] → PQ blob (1088 mlkem768 + 65 nistp256)
2114 | // [00 00 00 53] → signature structure length = 83
2115 | // [00 00 00 0b] → signature alg length
2116 | // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2117 | // [00 00 00 40] → signature length
2118 | // [40 bytes signature] → server signature
2119 |
2120 | // MLKEM1024NISTP384: RFC4253 SSH "string" (binary-encoded structure)
2121 | // [00 00 00 33] → host key structure length = 51
2122 | // [00 00 00 0b] → host key alg length = 11
2123 | // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2124 | // [00 00 00 20] → host key length = 32
2125 | // [32 bytes of public key] → public key
2126 | // [00 00 06 81] → PQ blob length = 1665 (0x0681)
2127 | // [1665 bytes PQ blob] → PQ blob (1568 mlkem1024 + 97 nistp384)
2128 | // [00 00 00 53] → signature structure length = 83
2129 | // [00 00 00 0b] → signature alg length
2130 | // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2131 | // [00 00 00 40] → signature length
2132 | // [40 bytes signature] → server signature
2133 |
2134 | ws_debug("SERVER REPLY follow offset pointer - absolute offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2134, __func__, "SERVER REPLY follow offset pointer - absolute offset: %d" , offset); } } while (0); // debug trace offset
4 | ← | Taking true branch | →
5 | ← | Loop condition is false. Exiting loop | →
2135 |
2136 | // Add the host key used to sign the key exchange to the GUI tree.
2137 | offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key", ett_key_exchange_host_key, global_data);
2138 |
2139 | ws_debug("SERVER REPLY add hostkey tree - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2139, __func__, "SERVER REPLY add hostkey tree - offset: %d" , offset); } } while (0); // debug trace offset
6 | ← | Taking true branch | →
7 | ← | Loop condition is false. Exiting loop | →
2140 |
2141 | int new_offset_server = ssh_read_f_pq(tvb, offset, global_data);
2142 | if (new_offset_server
7.1 | 'new_offset_server' is >= 0
< 0) {
8 | ← | Taking false branch | →
2143 | uint32_t bad_len = tvb_get_ntohl(tvb, offset);
2144 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 4,
2145 | "Invalid PQ server key length: %u", bad_len);
2146 | ws_debug("ExpertInfo: Invalid PQ server key length at offset %d: %u", offset, bad_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2146, __func__, "ExpertInfo: Invalid PQ server key length at offset %d: %u" , offset, bad_len); } } while (0);
2147 |
2148 | return offset + 4;
2149 | ws_debug("SERVER REPLY validate PQ server key length - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2149, __func__, "SERVER REPLY validate PQ server key length - offset: %d" , offset); } } while (0); // debug trace offset
2150 | }
2151 |
2152 | // Select encryption and MAC based on negotiated algorithms.
2153 | ssh_choose_enc_mac(global_data);
2154 |
2155 | // Write session secrets to keylog file (if enabled).
2156 | ssh_keylog_hash_write_secret(global_data, pinfo->pool);
9 | ← | Calling 'ssh_keylog_hash_write_secret' | →
2157 |
2158 | // PQ-hybrid KEMs cannot use ssh_add_tree_string => manual dissection
2159 | // Get PQ blob size
2160 | proto_tree *pq_tree = NULL((void*)0);
2161 | uint32_t hybrid_len = tvb_get_ntohl(tvb, offset);
2162 | ws_debug("SERVER REPLY PQ blob length - hybrid_len: %d", hybrid_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2162, __func__, "SERVER REPLY PQ blob length - hybrid_len: %d" , hybrid_len); } } while (0); // debug trace hybrid_len
2163 |
2164 | // Add a subtree for dissecting PQ blob
2165 | proto_tree_add_item(tree, hf_ssh_hybrid_blob_server_len, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000); // add blob length
2166 | offset += 4; // shift length field
2167 | pq_tree = proto_tree_add_subtree(tree, tvb, offset, hybrid_len, ett_ssh_pqhybrid_server, NULL((void*)0), "Hybrid Key Exchange Blob Server");
2168 | ws_debug("SERVER REPLY add PQ Hybrid subtree - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2168, __func__, "SERVER REPLY add PQ Hybrid subtree - offset: %d" , offset); } } while (0); // debug trace offset
2169 |
2170 | // Make a new tvb for just the PQ hybrid blob string contents
2171 | tvbuff_t *string_tvb = tvb_new_subset_length(tvb, offset, hybrid_len);
2172 |
2173 | uint32_t pq_len;
2174 | uint32_t t_len;
2175 | if (strcmp(kex_name, "sntrup761x25519-sha512") == 0) {
2176 | pq_len = 1039;
2177 | t_len = 32;
2178 | } else if (strcmp(kex_name, "mlkem768x25519-sha256") == 0) {
2179 | pq_len = 1088;
2180 | t_len = 32;
2181 | } else if (strcmp(kex_name, "mlkem768nistp256-sha256") == 0) {
2182 | pq_len = 1088;
2183 | t_len = 65;
2184 | } else if (strcmp(kex_name, "mlkem1024nistp384-sha384") == 0) {
2185 | pq_len = 1568;
2186 | t_len = 97;
2187 | } else {
2188 | DISSECTOR_ASSERT_NOT_REACHED()(proto_report_dissector_bug("%s:%u: failed assertion \"DISSECTOR_ASSERT_NOT_REACHED\"" , "epan/dissectors/packet-ssh.c", 2188));
2189 | break;
2190 | }
2191 |
2192 | if (pq_len + t_len != hybrid_len) {
2193 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 4,
2194 | "Invalid PQ hybrid server key length for %s: %u does not match %u + %u",
2195 | kex_name, hybrid_len, pq_len, t_len);
2196 | } else {
2197 | // Now dissect string inside the blob and add PQ server response and ECDH Q_S to GUI subtree
2198 | proto_tree_add_item(pq_tree, hf_ssh_pq_kem_server, string_tvb, 0, pq_len, ENC_NA0x00000000);
2199 | proto_tree_add_item(pq_tree, hf_ssh_ecdh_q_s, string_tvb, pq_len, t_len, ENC_NA0x00000000);
2200 | }
2201 |
2202 | // retrieve offset from read_f_pq() to shift blob length
2203 | offset = new_offset_server;
2204 | ws_debug("SERVER REPLY shift PQ blob - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2204, __func__, "SERVER REPLY shift PQ blob - offset: %d", offset ); } } while (0); // debug trace offset
2205 |
2206 | // Add the host's digital signature to the GUI tree
2207 | offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
2208 | ett_key_exchange_host_sig, global_data);
2209 | ws_debug("SERVER REPLY add signature tree - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2209, __func__, "SERVER REPLY add signature tree - offset: %d" , offset); } } while (0); // debug trace offset
2210 | break;
2211 | }
2212 | }
2213 |
2214 | if (msg_code == SSH_MSG_KEX_HYBRID_INIT30) {
2215 | ws_debug("OUT PQ HYBRID KEX - CLIENT INIT track offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2215, __func__, "OUT PQ HYBRID KEX - CLIENT INIT track offset: %d" , offset); } } while (0); // debug trace offset
2216 | } else if (msg_code == SSH_MSG_KEX_HYBRID_REPLY31) {
2217 | ws_debug("OUT PQ HYBRID KEX - SERVER REPLY track offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2217, __func__, "OUT PQ HYBRID KEX - SERVER REPLY track offset: %d" , offset); } } while (0); // debug trace offset
2218 | } else {
2219 | ws_debug("OUT PQ HYBRID KEX - track offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2219, __func__, "OUT PQ HYBRID KEX - track offset: %d", offset ); } } while (0); // debug trace offset
2220 | }
2221 |
2222 | return offset; // Final offset after packet is processed by ssh_dissect_kex_pq_hybrid()
2223 | }
2224 |
2225 | static ssh_message_info_t*
2226 | ssh_get_message(packet_info *pinfo, int record_id)
2227 | {
2228 | ssh_packet_info_t *packet = (ssh_packet_info_t *)p_get_proto_data(
2229 | wmem_file_scope(), pinfo, proto_ssh, 0);
2230 |
2231 | if (!packet) {
2232 | return NULL((void*)0);
2233 | }
2234 |
2235 | ssh_message_info_t *message = NULL((void*)0);
2236 | for (message = packet->messages; message; message = message->next) {
2237 | ws_noisy("%u:looking for message %d now %d", pinfo->num, record_id, message->id)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 2237, __func__, "%u:looking for message %d now %d", pinfo-> num, record_id, message->id); } } while (0);
2238 | if (message->id == record_id) {
2239 | return message;
2240 | }
2241 | }
2242 |
2243 | return NULL((void*)0);
2244 | }
2245 |
2246 | static int
2247 | ssh_try_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
2248 | struct ssh_peer_data *peer_data, int offset, proto_tree *tree)
2249 | {
2250 | bool_Bool can_decrypt = peer_data->cipher != NULL((void*)0) || peer_data->cipher_id == CIPHER_NULL0x00080000;
2251 | ssh_message_info_t *message = NULL((void*)0);
2252 |
2253 | if (can_decrypt) {
2254 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2255 | ssh_decrypt_packet(tvb, pinfo, peer_data, offset);
2256 | if (pinfo->desegment_len) {
2257 | return offset;
2258 | }
2259 | }
2260 |
2261 | int record_id = tvb_raw_offset(tvb) + offset;
2262 | message = ssh_get_message(pinfo, record_id);
2263 |
2264 | if (message) {
2265 | offset += ssh_dissect_decrypted_packet(tvb_new_subset_remaining(tvb, offset), pinfo, peer_data, tree, message);
2266 | return offset;
2267 | }
2268 | }
2269 |
2270 | return ssh_dissect_encrypted_packet(tvb, pinfo, peer_data, offset, tree);
2271 | }
2272 |
2273 | static int
2274 | ssh_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
2275 | struct ssh_peer_data *peer_data,
2276 | int offset, proto_tree *tree)
2277 | {
2278 | int len;
2279 | unsigned plen;
2280 |
2281 | len = tvb_reported_length_remaining(tvb, offset);
2282 | col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Encrypted packet (len=%d)", len);
2283 |
2284 | if (tree) {
2285 | int encrypted_len = len;
2286 |
2287 | if (len > 4 && peer_data->length_is_plaintext) {
2288 | plen = tvb_get_ntohl(tvb, offset) ;
2289 | proto_tree_add_uint(tree, hf_ssh_packet_length, tvb, offset, 4, plen);
2290 | encrypted_len -= 4;
2291 | }
2292 | else if (len > 4) {
2293 | proto_tree_add_item(tree, hf_ssh_packet_length_encrypted, tvb, offset, 4, ENC_NA0x00000000);
2294 | encrypted_len -= 4;
2295 | }
2296 |
2297 | if (peer_data->mac_length>0)
2298 | encrypted_len -= peer_data->mac_length;
2299 |
2300 | proto_tree_add_item(tree, hf_ssh_encrypted_packet,
2301 | tvb, offset+4, encrypted_len, ENC_NA0x00000000);
2302 |
2303 | if (peer_data->mac_length>0)
2304 | proto_tree_add_item(tree, hf_ssh_mac_string,
2305 | tvb, offset+4+encrypted_len,
2306 | peer_data->mac_length, ENC_NA0x00000000);
2307 | }
2308 | offset += len;
2309 | return offset;
2310 | }
2311 |
2312 | static int
2313 | ssh_dissect_protocol(tvbuff_t *tvb, packet_info *pinfo,
2314 | struct ssh_flow_data *global_data,
2315 | unsigned offset, proto_tree *tree, int is_response, unsigned * version,
2316 | bool_Bool *need_desegmentation)
2317 | {
2318 | unsigned protolen, next_offset;
2319 |
2320 | /*
2321 | * If the first packet do not contain the banner,
2322 | * it is dump in the middle of a flow or not a ssh at all
2323 | */
2324 | if (tvb_strncaseeql(tvb, offset, "SSH-", 4) != 0) {
2325 | offset = ssh_dissect_encrypted_packet(tvb, pinfo,
2326 | &global_data->peer_data[is_response], offset, tree);
2327 | return offset;
2328 | }
2329 |
2330 | if (!is_response) {
2331 | if (tvb_strncaseeql(tvb, offset, "SSH-2.", 6) == 0) {
2332 | *(version) = SSH_VERSION_22;
2333 | } else if (tvb_strncaseeql(tvb, offset, "SSH-1.99-", 9) == 0) {
2334 | *(version) = SSH_VERSION_22;
2335 | } else if (tvb_strncaseeql(tvb, offset, "SSH-1.", 6) == 0) {
2336 | *(version) = SSH_VERSION_11;
2337 | }
2338 | }
2339 |
2340 | if (!tvb_find_line_end_remaining(tvb, offset, &protolen, &next_offset)) {
2341 | if (ssh_desegment && pinfo->can_desegment) {
2342 | pinfo->desegment_offset = offset;
2343 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
2344 | *need_desegmentation = true1;
2345 | return offset;
2346 | }
2347 | }
2348 | /* Either we found it, or we're not reassembling and take everything. */
2349 |
2350 | col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Protocol (%s)",
2351 | tvb_format_text(pinfo->pool, tvb, offset, protolen));
2352 |
2353 | // V_C / V_S (client and server identification strings) RFC4253 4.2
2354 | // format: SSH-protoversion-softwareversion SP comments [CR LF not incl.]
2355 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2356 | uint8_t *data = (uint8_t *)tvb_memdup(pinfo->pool, tvb, offset, protolen);
2357 | if(!is_response){
2358 | ssh_hash_buffer_put_string(global_data->kex_client_version, data, protolen);
2359 | }else{
2360 | ssh_hash_buffer_put_string(global_data->kex_server_version, data, protolen);
2361 | }
2362 | }
2363 |
2364 | proto_tree_add_item(tree, hf_ssh_protocol,
2365 | tvb, offset, protolen, ENC_ASCII0x00000000);
2366 | offset += next_offset;
2367 | return offset;
2368 | }
2369 |
2370 | static void
2371 | ssh_set_mac_length(struct ssh_peer_data *peer_data)
2372 | {
2373 | char *size_str;
2374 | uint32_t size = 0;
2375 | char *mac_name = peer_data->mac;
2376 | char *strip;
2377 |
2378 | if (!mac_name)
2379 | return;
2380 |
2381 | /* wmem_strdup() never returns NULL */
2382 | mac_name = wmem_strdup(NULL((void*)0), (const char *)mac_name);
2383 |
2384 | /* strip trailing "-etm@openssh.com" or "@openssh.com" */
2385 | strip = strstr(mac_name, "-etm@openssh.com");
2386 | if (strip) {
2387 | peer_data->length_is_plaintext = 1;
2388 | *strip = '\0';
2389 | }
2390 | else {
2391 | strip = strstr(mac_name, "@openssh.com");
2392 | if (strip) *strip = '\0';
2393 | }
2394 |
2395 | size_str = g_strrstr(mac_name, "-");
2396 | if (size_str && ws_strtou32(size_str + 1, NULL((void*)0), &size) && size > 0 && size % 8 == 0) {
2397 | peer_data->mac_length = size / 8;
2398 | }
2399 | else if (strcmp(mac_name, "hmac-sha1") == 0) {
2400 | peer_data->mac_length = 20;
2401 | }
2402 | else if (strcmp(mac_name, "hmac-md5") == 0) {
2403 | peer_data->mac_length = 16;
2404 | }
2405 | else if (strcmp(mac_name, "hmac-ripemd160") == 0) {
2406 | peer_data->mac_length = 20;
2407 | }
2408 | else if (strcmp(mac_name, "none") == 0) {
2409 | peer_data->mac_length = 0;
2410 | }
2411 |
2412 | wmem_free(NULL((void*)0), mac_name);
2413 | }
2414 |
2415 | static void ssh_set_kex_specific_dissector(struct ssh_flow_data *global_data)
2416 | {
2417 | const char *kex_name = global_data->kex;
2418 |
2419 | if (!kex_name) return;
2420 |
2421 | if (strcmp(kex_name, "diffie-hellman-group-exchange-sha1") == 0 ||
2422 | strcmp(kex_name, "diffie-hellman-group-exchange-sha256") == 0)
2423 | {
2424 | global_data->kex_specific_dissector = ssh_dissect_kex_dh_gex;
2425 | }
2426 | else if (g_str_has_prefix(kex_name, "ecdh-sha2-")(__builtin_constant_p ("ecdh-sha2-")? __extension__ ({ const char * const __str = (kex_name); const char * const __prefix = ("ecdh-sha2-" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (kex_name, "ecdh-sha2-" ) ) ||
2427 | strcmp(kex_name, "curve25519-sha256@libssh.org") == 0 ||
2428 | strcmp(kex_name, "curve25519-sha256") == 0 ||
2429 | strcmp(kex_name, "curve448-sha512") == 0)
2430 | {
2431 | global_data->kex_specific_dissector = ssh_dissect_kex_ecdh;
2432 | }
2433 | else if (strcmp(kex_name, "diffie-hellman-group14-sha256") == 0 ||
2434 | strcmp(kex_name, "diffie-hellman-group16-sha512") == 0 ||
2435 | strcmp(kex_name, "diffie-hellman-group18-sha512") == 0 ||
2436 | strcmp(kex_name, "diffie-hellman-group1-sha1") == 0 ||
2437 | strcmp(kex_name, "diffie-hellman-group14-sha1") == 0)
2438 | {
2439 | global_data->kex_specific_dissector = ssh_dissect_kex_dh;
2440 | }
2441 | else if (strcmp(kex_name, "sntrup761x25519-sha512") == 0 ||
2442 | strcmp(kex_name, "mlkem768x25519-sha256") == 0 ||
2443 | strcmp(kex_name, "mlkem768nistp256-sha256") == 0 ||
2444 | strcmp(kex_name, "mlkem1024nistp384-sha384") == 0)
2445 | {
2446 | global_data->kex_specific_dissector = ssh_dissect_kex_pq_hybrid;
2447 | }
2448 | else
2449 | {
2450 | ws_warning("NOT SUPPORTED OR UNKNOWN KEX DETECTED: ALGORITHM = %s", kex_name)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_WARNING, "epan/dissectors/packet-ssh.c" , 2450, __func__, "NOT SUPPORTED OR UNKNOWN KEX DETECTED: ALGORITHM = %s" , kex_name); } } while (0);
2451 | }
2452 | }
2453 |
2454 | static int
2455 | ssh_gslist_compare_strings(const void *a, const void *b)
2456 | {
2457 | if (a == NULL((void*)0) && b == NULL((void*)0))
2458 | return 0;
2459 | if (a == NULL((void*)0))
2460 | return -1;
2461 | if (b == NULL((void*)0))
2462 | return 1;
2463 | return strcmp((const char*)a, (const char*)b);
2464 | }
2465 |
2466 | /* expects that *result is NULL */
2467 | static bool_Bool
2468 | ssh_choose_algo(char *client, char *server, char **result)
2469 | {
2470 | char **server_strings = NULL((void*)0);
2471 | char **client_strings = NULL((void*)0);
2472 | char **step;
2473 | GSList *server_list = NULL((void*)0);
2474 |
2475 | static const char* client_strict = "kex-strict-c-v00@openssh.com";
2476 | static const char* server_strict = "kex-strict-s-v00@openssh.com";
2477 | bool_Bool kex_strict = false0;
2478 |
2479 | if (!client || !server || !result || *result)
2480 | return false0;
2481 |
2482 | server_strings = g_strsplit(server, ",", 0);
2483 | for (step = server_strings; *step; step++) {
2484 | server_list = g_slist_append(server_list, *step);
2485 | }
2486 |
2487 | client_strings = g_strsplit(client, ",", 0);
2488 | for (step = client_strings; *step; step++) {
2489 | GSList *agreed;
2490 | if ((agreed = g_slist_find_custom(server_list, *step, ssh_gslist_compare_strings))) {
2491 | *result = wmem_strdup(wmem_file_scope(), (const char *)agreed->data);
2492 | break;
2493 | }
2494 | }
2495 |
2496 | /* Check for the OpenSSH strict key exchange extension designed to
2497 | * mitigate the Terrapin attack by resetting the packet sequence
2498 | * number to zero after a SSH2_MSG_NEWKEYS message.
2499 | * https://www.openssh.com/txt/release-9.6
2500 | * Also see PROTOCOL in the OpenSSH source distribution.
2501 | *
2502 | * OpenSSH says this is activated "when an endpoint that supports this
2503 | * extension observes this algorithm name in a peer's KEXINIT packet".
2504 | * We'll have to assume that any endpoint that supports this also
2505 | * indicates support for it in its own first SSH2_MSG_KEXINIT.
2506 | */
2507 | if (g_strv_contains((const char* const*)client_strings, client_strict) &&
2508 | g_strv_contains((const char* const*)server_strings, server_strict)) {
2509 |
2510 | kex_strict = true1;
2511 | }
2512 |
2513 | g_strfreev(client_strings);
2514 | g_slist_free(server_list);
2515 | g_strfreev(server_strings);
2516 |
2517 | return kex_strict;
2518 | }
2519 |
2520 | static int
2521 | ssh_dissect_key_init(tvbuff_t *tvb, packet_info *pinfo, int offset,
2522 | proto_tree *tree, int is_response, struct ssh_flow_data *global_data)
2523 | {
2524 | int start_offset = offset;
2525 | int payload_length;
2526 | wmem_strbuf_t *hassh_algo;
2527 | char *hassh;
2528 |
2529 | proto_item *tf, *ti;
2530 | proto_tree *key_init_tree;
2531 |
2532 | struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
2533 |
2534 | key_init_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_key_init, &tf, "Algorithms");
2535 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2536 | peer_data->bn_cookie = ssh_kex_make_bignum(tvb_get_ptr(tvb, offset, 16), 16);
2537 | }
2538 | proto_tree_add_item(key_init_tree, hf_ssh_cookie,
2539 | tvb, offset, 16, ENC_NA0x00000000);
2540 | offset += 16;
2541 |
2542 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2543 | hf_ssh_kex_algorithms_length, hf_ssh_kex_algorithms,
2544 | &peer_data->kex_proposal);
2545 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2546 | hf_ssh_server_host_key_algorithms_length,
2547 | hf_ssh_server_host_key_algorithms, NULL((void*)0));
2548 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2549 | hf_ssh_encryption_algorithms_client_to_server_length,
2550 | hf_ssh_encryption_algorithms_client_to_server,
2551 | &peer_data->enc_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2552 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2553 | hf_ssh_encryption_algorithms_server_to_client_length,
2554 | hf_ssh_encryption_algorithms_server_to_client,
2555 | &peer_data->enc_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2556 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2557 | hf_ssh_mac_algorithms_client_to_server_length,
2558 | hf_ssh_mac_algorithms_client_to_server,
2559 | &peer_data->mac_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2560 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2561 | hf_ssh_mac_algorithms_server_to_client_length,
2562 | hf_ssh_mac_algorithms_server_to_client,
2563 | &peer_data->mac_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2564 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2565 | hf_ssh_compression_algorithms_client_to_server_length,
2566 | hf_ssh_compression_algorithms_client_to_server,
2567 | &peer_data->comp_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2568 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2569 | hf_ssh_compression_algorithms_server_to_client_length,
2570 | hf_ssh_compression_algorithms_server_to_client,
2571 | &peer_data->comp_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2572 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2573 | hf_ssh_languages_client_to_server_length,
2574 | hf_ssh_languages_client_to_server, NULL((void*)0));
2575 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2576 | hf_ssh_languages_server_to_client_length,
2577 | hf_ssh_languages_server_to_client, NULL((void*)0));
2578 |
2579 | proto_tree_add_item(key_init_tree, hf_ssh_first_kex_packet_follows,
2580 | tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
2581 | offset+=1;
2582 |
2583 | proto_tree_add_item(key_init_tree, hf_ssh_kex_reserved,
2584 | tvb, offset, 4, ENC_NA0x00000000);
2585 | offset+=4;
2586 |
2587 | hassh_algo = wmem_strbuf_new(pinfo->pool, "");
2588 | if(!is_response) {
2589 | wmem_strbuf_append_printf(hassh_algo, "%s;%s;%s;%s", peer_data->kex_proposal, peer_data->enc_proposals[CLIENT_TO_SERVER_PROPOSAL0],
2590 | peer_data->mac_proposals[CLIENT_TO_SERVER_PROPOSAL0], peer_data->comp_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2591 | hassh = g_compute_checksum_for_string(G_CHECKSUM_MD5, wmem_strbuf_get_str(hassh_algo), wmem_strbuf_get_len(hassh_algo));
2592 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hassh_algo, tvb, offset, 0, wmem_strbuf_get_str(hassh_algo));
2593 | proto_item_set_generated(ti);
2594 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hassh, tvb, offset, 0, hassh);
2595 | proto_item_set_generated(ti);
2596 | g_free(hassh);
2597 | } else {
2598 | wmem_strbuf_append_printf(hassh_algo, "%s;%s;%s;%s", peer_data->kex_proposal, peer_data->enc_proposals[SERVER_TO_CLIENT_PROPOSAL1],
2599 | peer_data->mac_proposals[SERVER_TO_CLIENT_PROPOSAL1], peer_data->comp_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2600 | hassh = g_compute_checksum_for_string(G_CHECKSUM_MD5, wmem_strbuf_get_str(hassh_algo), wmem_strbuf_get_len(hassh_algo));
2601 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hasshserver_algo, tvb, offset, 0, wmem_strbuf_get_str(hassh_algo));
2602 | proto_item_set_generated(ti);
2603 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hasshserver, tvb, offset, 0, hassh);
2604 | proto_item_set_generated(ti);
2605 | g_free(hassh);
2606 | }
2607 |
2608 | if (global_data->peer_data[CLIENT_PEER_DATA0].kex_proposal &&
2609 | global_data->peer_data[SERVER_PEER_DATA1].kex_proposal &&
2610 | !global_data->kex)
2611 | {
2612 | /* Note: we're ignoring first_kex_packet_follows. */
2613 | global_data->ext_kex_strict = ssh_choose_algo(
2614 | global_data->peer_data[CLIENT_PEER_DATA0].kex_proposal,
2615 | global_data->peer_data[SERVER_PEER_DATA1].kex_proposal,
2616 | &global_data->kex);
2617 | ssh_set_kex_specific_dissector(global_data);
2618 | }
2619 |
2620 | payload_length = offset - start_offset;
2621 |
2622 | if (tf != NULL((void*)0)) {
2623 | proto_item_set_len(tf, payload_length);
2624 | }
2625 |
2626 | // I_C / I_S (client and server SSH_MSG_KEXINIT payload) RFC4253 4.2
2627 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2628 | uint8_t *data = (uint8_t *)wmem_alloc(pinfo->pool, payload_length + 1);
2629 | tvb_memcpy(tvb, data + 1, start_offset, payload_length);
2630 | data[0] = SSH_MSG_KEXINIT20;
2631 | if(is_response){
2632 | ssh_hash_buffer_put_string(global_data->kex_server_key_exchange_init, data, payload_length + 1);
2633 | }else{
2634 | // Reset array while REKEY: sanitize client key
2635 | global_data->kex_client_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
2636 | ssh_hash_buffer_put_string(global_data->kex_client_key_exchange_init, data, payload_length + 1);
2637 | }
2638 | }
2639 |
2640 | return offset;
2641 | }
2642 |
2643 | static int
2644 | ssh_dissect_proposal(tvbuff_t *tvb, int offset, proto_tree *tree,
2645 | int hf_index_length, int hf_index_value, char **store)
2646 | {
2647 | uint32_t len = tvb_get_ntohl(tvb, offset);
2648 | proto_tree_add_uint(tree, hf_index_length, tvb, offset, 4, len);
2649 | offset += 4;
2650 |
2651 | proto_tree_add_item(tree, hf_index_value, tvb, offset, len,
2652 | ENC_ASCII0x00000000);
2653 | if (store)
2654 | *store = (char *) tvb_get_string_enc(wmem_file_scope(), tvb, offset, len, ENC_ASCII0x00000000);
2655 | offset += len;
2656 |
2657 | return offset;
2658 | }
2659 |
2660 | static void
2661 | ssh_keylog_read_file(void)
2662 | {
2663 | if (!pref_keylog_file || !*pref_keylog_file) {
11 | ← | Assuming 'pref_keylog_file' is non-null | →
12 | ← | Assuming the condition is false | →
2664 | ws_debug("no keylog file preference set")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2664, __func__, "no keylog file preference set"); } } while (0);
2665 | return;
2666 | }
2667 |
2668 | if (ssh_keylog_file && file_needs_reopen(ws_filenofileno(ssh_keylog_file),
13 | ← | Assuming 'ssh_keylog_file' is non-null | →
14 | ← | Assuming the condition is false | →
15 | ← | Taking false branch | →
2669 | pref_keylog_file)) {
2670 | ssh_keylog_reset();
2671 | g_hash_table_remove_all(ssh_master_key_map);
2672 | }
2673 |
2674 | if (!ssh_keylog_file) {
16 | ← | Assuming 'ssh_keylog_file' is non-null | →
17 | ← | Taking false branch | →
2675 | ssh_keylog_file = ws_fopenfopen(pref_keylog_file, "r");
2676 | if (!ssh_keylog_file) {
2677 | ws_debug("ssh: failed to open key log file %s: %s",do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2678, __func__, "ssh: failed to open key log file %s: %s", pref_keylog_file , g_strerror((*__errno_location ()))); } } while (0)
2678 | pref_keylog_file, g_strerror(errno))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2678, __func__, "ssh: failed to open key log file %s: %s", pref_keylog_file , g_strerror((*__errno_location ()))); } } while (0);
2679 | return;
2680 | }
2681 | }
2682 |
2683 | /* File format: each line follows the format "<cookie> <type> <key>".
2684 | * <cookie> is the hex-encoded (client or server) 16 bytes cookie
2685 | * (32 characters) found in the SSH_MSG_KEXINIT of the endpoint whose
2686 | * private random is disclosed.
2687 | * <type> is either SHARED_SECRET or PRIVATE_KEY depending on the
2688 | * type of key provided. PRIVAT_KEY is only supported for DH,
2689 | * DH group exchange, and ECDH (including Curve25519) key exchanges.
2690 | * <key> is the private random number that is used to generate the DH
2691 | * negotiation (length depends on algorithm). In RFC4253 it is called
2692 | * x for the client and y for the server.
2693 | * For openssh and DH group exchange, it can be retrieved using
2694 | * DH_get0_key(kex->dh, NULL, &server_random)
2695 | * for groupN in file kexdh.c function kex_dh_compute_key
2696 | * for custom group in file kexgexs.c function input_kex_dh_gex_init
2697 | * For openssh and curve25519, it can be found in function kex_c25519_enc
2698 | * in variable server_key. One may also provide the shared secret
2699 | * directly if <type> is set to SHARED_SECRET.
2700 | *
2701 | * Example:
2702 | * 90d886612f9c35903db5bb30d11f23c2 PRIVATE_KEY DEF830C22F6C927E31972FFB20B46C96D0A5F2D5E7BE5A3A8804D6BFC431619ED10AF589EEDFF4750DEA00EFD7AFDB814B6F3528729692B1F2482041521AE9DC
2703 | */
2704 | for (;;) {
18 | ← | Loop condition is true. Entering loop body | →
2705 | // XXX - What is a reasonable max line length here? Note at a certain
2706 | // point we have to increase the maximum ssh_kex_make_bignum supports (not needed for post quantum material (pure binary)).
2707 | char buf[4096];// 4096 is needed for mlkem1024 private_key binary meterial: https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.203.pdf
2708 | buf[0] = 0;
2709 |
2710 | if (!fgets(buf, sizeof(buf), ssh_keylog_file)) {
19 | ← | Taking true branch | →
2711 | rewind(ssh_keylog_file); // Resets to start of file (to handle parallel multi sessions decryption)
20 | ← | After calling 'rewind' reading 'errno' is required to find out if the call has failed | →
2712 | if (ferror(ssh_keylog_file)) {
21 | ← | Value of 'errno' was not checked and may be overwritten by function 'ferror'
2713 | ws_debug("Error while reading %s, closing it.", pref_keylog_file)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2713, __func__, "Error while reading %s, closing it.", pref_keylog_file ); } } while (0);
2714 | ssh_keylog_reset();
2715 | g_hash_table_remove_all(ssh_master_key_map);
2716 | }
2717 | break;
2718 | }
2719 |
2720 | size_t len = strlen(buf);
2721 | while(len>0 && (buf[len-1]=='\r' || buf[len-1]=='\n')){len-=1;buf[len]=0;}
2722 | ws_noisy("ssh: raw keylog line read: %s", buf)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 2722, __func__, "ssh: raw keylog line read: %s", buf); } } while (0);
2723 |
2724 | ssh_keylog_process_line(buf);
2725 | }
2726 | }
2727 |
2728 | static void
2729 | ssh_keylog_process_lines(const uint8_t *data, unsigned datalen)
2730 | {
2731 | const char *next_line = (const char *)data;
2732 | const char *line_end = next_line + datalen;
2733 | while (next_line && next_line < line_end) {
2734 | const char *line = next_line;
2735 | next_line = (const char *)memchr(line, '\n', line_end - line);
2736 | ssize_t linelen;
2737 |
2738 | if (next_line) {
2739 | linelen = next_line - line;
2740 | next_line++; /* drop LF */
2741 | } else {
2742 | linelen = (ssize_t)(line_end - line);
2743 | }
2744 | if (linelen > 0 && line[linelen - 1] == '\r') {
2745 | linelen--; /* drop CR */
2746 | }
2747 |
2748 | ssh_debug_printf(" checking keylog line: %.*s\n", (int)linelen, line);
2749 | ws_noisy("ssh: about to process line: %.*s", (int)linelen, line)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 2749, __func__, "ssh: about to process line: %.*s", (int)linelen , line); } } while (0);
2750 |
2751 | char * strippedline = g_strndup(line, linelen);
2752 | ssh_keylog_process_line(strippedline);
2753 | g_free(strippedline);
2754 | }
2755 | }
2756 |
2757 | static void
2758 | ssh_keylog_process_line(const char *line)
2759 | {
2760 | ws_noisy("ssh: process line: %s", line)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 2760, __func__, "ssh: process line: %s", line); } } while ( 0);
2761 |
2762 | char **split = g_strsplit(line, " ", 3);
2763 | char *cookie, *type, *key;
2764 | size_t cookie_len, key_len;
2765 |
2766 | if (g_strv_length(split) == 3) {
2767 | // New format: [hex-encoded cookie] [key type] [hex-encoded key material]
2768 | cookie = split[0];
2769 | type = split[1];
2770 | key = split[2];
2771 | } else if (g_strv_length(split) == 2) {
2772 | // Old format: [hex-encoded cookie] [hex-encoded private key]
2773 | ws_debug("ssh keylog: detected old keylog format without explicit key type")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2773, __func__, "ssh keylog: detected old keylog format without explicit key type" ); } } while (0);
2774 | type = "PRIVATE_KEY";
2775 | cookie = split[0];
2776 | key = split[1];
2777 | } else {
2778 | ws_debug("ssh keylog: invalid format")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2778, __func__, "ssh keylog: invalid format"); } } while (0 );
2779 | g_strfreev(split);
2780 | return;
2781 | }
2782 |
2783 | key_len = strlen(key);
2784 | cookie_len = strlen(cookie);
2785 | if(key_len & 1){
2786 | ws_debug("ssh keylog: invalid format (key should at least be even!)")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2786, __func__, "ssh keylog: invalid format (key should at least be even!)" ); } } while (0);
2787 | g_strfreev(split);
2788 | return;
2789 | }
2790 | if(cookie_len & 1){
2791 | ws_debug("ssh keylog: invalid format (cookie should at least be even!)")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2791, __func__, "ssh keylog: invalid format (cookie should at least be even!)" ); } } while (0);
2792 | g_strfreev(split);
2793 | return;
2794 | }
2795 | ssh_bignum * bn_cookie = ssh_kex_make_bignum(NULL((void*)0), (unsigned)(cookie_len/2));
2796 | ssh_bignum * bn_priv = ssh_kex_make_bignum(NULL((void*)0), (unsigned)(key_len/2));
2797 | uint8_t c;
2798 | for (size_t i = 0; i < key_len/2; i ++) {
2799 | char v0 = key[i * 2];
2800 | int8_t h0 = ws_xton(v0);
2801 | char v1 = key[i * 2 + 1];
2802 | int8_t h1 = ws_xton(v1);
2803 |
2804 | if (h0==-1 || h1==-1) {
2805 | ws_debug("ssh: can't process key, invalid hex number: %c%c", v0, v1)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2805, __func__, "ssh: can't process key, invalid hex number: %c%c" , v0, v1); } } while (0);
2806 | g_strfreev(split);
2807 | return;
2808 | }
2809 |
2810 | c = (h0 << 4) | h1;
2811 |
2812 | bn_priv->data[i] = c;
2813 | }
2814 | for (size_t i = 0; i < cookie_len/2; i ++) {
2815 | char v0 = cookie[i * 2];
2816 | int8_t h0 = ws_xton(v0);
2817 | char v1 = cookie[i * 2 + 1];
2818 | int8_t h1 = ws_xton(v1);
2819 |
2820 | if (h0==-1 || h1==-1) {
2821 | ws_debug("ssh: can't process cookie, invalid hex number: %c%c", v0, v1)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2821, __func__, "ssh: can't process cookie, invalid hex number: %c%c" , v0, v1); } } while (0);
2822 | g_strfreev(split);
2823 | return;
2824 | }
2825 |
2826 | c = (h0 << 4) | h1;
2827 |
2828 | bn_cookie->data[i] = c;
2829 | }
2830 | ssh_bignum * bn_priv_ht = g_new(ssh_bignum, 1)((ssh_bignum *) g_malloc_n ((1), sizeof (ssh_bignum)));
2831 | bn_priv_ht->length = bn_priv->length;
2832 | bn_priv_ht->data = (uint8_t *) g_memdup2(bn_priv->data, bn_priv->length);
2833 | ssh_bignum * bn_cookie_ht = g_new(ssh_bignum, 1)((ssh_bignum *) g_malloc_n ((1), sizeof (ssh_bignum)));
2834 | bn_cookie_ht->length = bn_cookie->length;
2835 | bn_cookie_ht->data = (uint8_t *) g_memdup2(bn_cookie->data, bn_cookie->length);
2836 |
2837 | char * type_ht = (char *) g_memdup2(type, strlen(type) + 1);
2838 | ssh_key_map_entry_t * entry_ht = g_new(ssh_key_map_entry_t, 1)((ssh_key_map_entry_t *) g_malloc_n ((1), sizeof (ssh_key_map_entry_t )));
2839 | entry_ht->type = type_ht;
2840 | entry_ht->key_material = bn_priv_ht;
2841 | g_hash_table_insert(ssh_master_key_map, bn_cookie_ht, entry_ht);
2842 | g_strfreev(split);
2843 | }
2844 |
2845 | static void
2846 | ssh_keylog_reset(void)
2847 | {
2848 | if (ssh_keylog_file) {
2849 | fclose(ssh_keylog_file);
2850 | ssh_keylog_file = NULL((void*)0);
2851 | }
2852 | }
2853 |
2854 | static unsigned
2855 | ssh_kex_type(char *type)
2856 | {
2857 | if (type) {
2858 | if (g_str_has_prefix(type, "curve25519")(__builtin_constant_p ("curve25519")? __extension__ ({ const char * const __str = (type); const char * const __prefix = ("curve25519" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (type, "curve25519") )) {
2859 | return SSH_KEX_CURVE255190x00010000;
2860 | }else if (g_str_has_prefix(type, "sntrup761x25519")(__builtin_constant_p ("sntrup761x25519")? __extension__ ({ const char * const __str = (type); const char * const __prefix = ( "sntrup761x25519"); gboolean __result = (0); if (__str == ((void *)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix); else { const size_t __str_len = strlen (( (__str) + !(__str))); const size_t __prefix_len = strlen (((__prefix ) + !(__prefix))); if (__str_len >= __prefix_len) __result = memcmp (((__str) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len ) == 0; } __result; }) : (g_str_has_prefix) (type, "sntrup761x25519" ) )) {
2861 | return SSH_KEX_SNTRUP761X255190x00040000;
2862 | }else if (g_str_has_prefix(type, "mlkem768x25519")(__builtin_constant_p ("mlkem768x25519")? __extension__ ({ const char * const __str = (type); const char * const __prefix = ( "mlkem768x25519"); gboolean __result = (0); if (__str == ((void *)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix); else { const size_t __str_len = strlen (( (__str) + !(__str))); const size_t __prefix_len = strlen (((__prefix ) + !(__prefix))); if (__str_len >= __prefix_len) __result = memcmp (((__str) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len ) == 0; } __result; }) : (g_str_has_prefix) (type, "mlkem768x25519" ) )) {
2863 | return SSH_KEX_MLKEM768X255190x00050000;
2864 | }else if (g_str_has_prefix(type, "diffie-hellman-group-exchange")(__builtin_constant_p ("diffie-hellman-group-exchange")? __extension__ ({ const char * const __str = (type); const char * const __prefix = ("diffie-hellman-group-exchange"); gboolean __result = (0) ; if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix); else { const size_t __str_len = strlen (((__str) + !(__str))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix))); if (__str_len >= __prefix_len ) __result = memcmp (((__str) + !(__str)), ((__prefix) + !(__prefix )), __prefix_len) == 0; } __result; }) : (g_str_has_prefix) ( type, "diffie-hellman-group-exchange") )) {
2865 | return SSH_KEX_DH_GEX0x00020000;
2866 | }else if (g_str_has_prefix(type, "diffie-hellman-group14")(__builtin_constant_p ("diffie-hellman-group14")? __extension__ ({ const char * const __str = (type); const char * const __prefix = ("diffie-hellman-group14"); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix ) (__str, __prefix); else { const size_t __str_len = strlen ( ((__str) + !(__str))); const size_t __prefix_len = strlen ((( __prefix) + !(__prefix))); if (__str_len >= __prefix_len) __result = memcmp (((__str) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len ) == 0; } __result; }) : (g_str_has_prefix) (type, "diffie-hellman-group14" ) )) {
2867 | return SSH_KEX_DH_GROUP140x00030014;
2868 | }else if (g_str_has_prefix(type, "diffie-hellman-group16")(__builtin_constant_p ("diffie-hellman-group16")? __extension__ ({ const char * const __str = (type); const char * const __prefix = ("diffie-hellman-group16"); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix ) (__str, __prefix); else { const size_t __str_len = strlen ( ((__str) + !(__str))); const size_t __prefix_len = strlen ((( __prefix) + !(__prefix))); if (__str_len >= __prefix_len) __result = memcmp (((__str) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len ) == 0; } __result; }) : (g_str_has_prefix) (type, "diffie-hellman-group16" ) )) {
2869 | return SSH_KEX_DH_GROUP160x00030016;
2870 | }else if (g_str_has_prefix(type, "diffie-hellman-group18")(__builtin_constant_p ("diffie-hellman-group18")? __extension__ ({ const char * const __str = (type); const char * const __prefix = ("diffie-hellman-group18"); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix ) (__str, __prefix); else { const size_t __str_len = strlen ( ((__str) + !(__str))); const size_t __prefix_len = strlen ((( __prefix) + !(__prefix))); if (__str_len >= __prefix_len) __result = memcmp (((__str) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len ) == 0; } __result; }) : (g_str_has_prefix) (type, "diffie-hellman-group18" ) )) {
2871 | return SSH_KEX_DH_GROUP180x00030018;
2872 | }else if (g_str_has_prefix(type, "diffie-hellman-group1")(__builtin_constant_p ("diffie-hellman-group1")? __extension__ ({ const char * const __str = (type); const char * const __prefix = ("diffie-hellman-group1"); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix ) (__str, __prefix); else { const size_t __str_len = strlen ( ((__str) + !(__str))); const size_t __prefix_len = strlen ((( __prefix) + !(__prefix))); if (__str_len >= __prefix_len) __result = memcmp (((__str) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len ) == 0; } __result; }) : (g_str_has_prefix) (type, "diffie-hellman-group1" ) )) {
2873 | return SSH_KEX_DH_GROUP10x00030001;
2874 | }
2875 | }
2876 |
2877 | return 0;
2878 | }
2879 |
2880 | static unsigned
2881 | ssh_kex_hash_type(char *type_string)
2882 | {
2883 | if (type_string && g_str_has_suffix(type_string, "sha1")(__builtin_constant_p ("sha1")? __extension__ ({ const char * const __str = (type_string); const char * const __suffix = ( "sha1"); gboolean __result = (0); if (__str == ((void*)0) || __suffix == ((void*)0)) __result = (g_str_has_suffix) (__str, __suffix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __suffix_len = strlen (((__suffix) + !(__suffix ))); if (__str_len >= __suffix_len) __result = memcmp (__str + __str_len - __suffix_len, ((__suffix) + !(__suffix)), __suffix_len ) == 0; } __result; }) : (g_str_has_suffix) (type_string, "sha1" ) )) {
2884 | return SSH_KEX_HASH_SHA11;
2885 | }else if (type_string && g_str_has_suffix(type_string, "sha256")(__builtin_constant_p ("sha256")? __extension__ ({ const char * const __str = (type_string); const char * const __suffix = ("sha256"); gboolean __result = (0); if (__str == ((void*)0) || __suffix == ((void*)0)) __result = (g_str_has_suffix) (__str , __suffix); else { const size_t __str_len = strlen (((__str) + !(__str))); const size_t __suffix_len = strlen (((__suffix ) + !(__suffix))); if (__str_len >= __suffix_len) __result = memcmp (__str + __str_len - __suffix_len, ((__suffix) + !( __suffix)), __suffix_len) == 0; } __result; }) : (g_str_has_suffix ) (type_string, "sha256") )) {
2886 | return SSH_KEX_HASH_SHA2562;
2887 | }else if (type_string && g_str_has_suffix(type_string, "sha256@libssh.org")(__builtin_constant_p ("sha256@libssh.org")? __extension__ ({ const char * const __str = (type_string); const char * const __suffix = ("sha256@libssh.org"); gboolean __result = (0); if (__str == ((void*)0) || __suffix == ((void*)0)) __result = ( g_str_has_suffix) (__str, __suffix); else { const size_t __str_len = strlen (((__str) + !(__str))); const size_t __suffix_len = strlen (((__suffix) + !(__suffix))); if (__str_len >= __suffix_len ) __result = memcmp (__str + __str_len - __suffix_len, ((__suffix ) + !(__suffix)), __suffix_len) == 0; } __result; }) : (g_str_has_suffix ) (type_string, "sha256@libssh.org") )) {
2888 | return SSH_KEX_HASH_SHA2562;
2889 | }else if (type_string && g_str_has_suffix(type_string, "sha512")(__builtin_constant_p ("sha512")? __extension__ ({ const char * const __str = (type_string); const char * const __suffix = ("sha512"); gboolean __result = (0); if (__str == ((void*)0) || __suffix == ((void*)0)) __result = (g_str_has_suffix) (__str , __suffix); else { const size_t __str_len = strlen (((__str) + !(__str))); const size_t __suffix_len = strlen (((__suffix ) + !(__suffix))); if (__str_len >= __suffix_len) __result = memcmp (__str + __str_len - __suffix_len, ((__suffix) + !( __suffix)), __suffix_len) == 0; } __result; }) : (g_str_has_suffix ) (type_string, "sha512") )) {
2890 | return SSH_KEX_HASH_SHA5124;
2891 | } else {
2892 | ws_debug("hash type %s not supported", type_string)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2892, __func__, "hash type %s not supported", type_string); } } while (0);
2893 | return 0;
2894 | }
2895 | }
2896 |
2897 | static ssh_bignum *
2898 | ssh_kex_make_bignum(const uint8_t *data, unsigned length)
2899 | {
2900 | // 512 bytes (4096 bits) is the maximum bignum size we're supporting
2901 | // Actually we need 513 bytes, to make provision for signed values
2902 | // Diffie-Hellman group 18 has 8192 bits
2903 | if (length == 0 || length > 1025) {
2904 | return NULL((void*)0);
2905 | }
2906 |
2907 | ssh_bignum *bn = wmem_new0(wmem_file_scope(), ssh_bignum)((ssh_bignum*)wmem_alloc0((wmem_file_scope()), sizeof(ssh_bignum )));
2908 | bn->data = (uint8_t *)wmem_alloc0(wmem_file_scope(), length);
2909 |
2910 | if (data) {
2911 | memcpy(bn->data, data, length);
2912 | }
2913 |
2914 | bn->length = length;
2915 | return bn;
2916 | }
2917 |
2918 | static bool_Bool
2919 | ssh_read_e(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2920 | {
2921 | // store the client's public part (e) for later usage
2922 | uint32_t length = tvb_get_ntohl(tvb, offset);
2923 | global_data->kex_e = ssh_kex_make_bignum(NULL((void*)0), length);
2924 | if (!global_data->kex_e) {
2925 | return false0;
2926 | }
2927 | tvb_memcpy(tvb, global_data->kex_e->data, offset + 4, length);
2928 | return true1;
2929 | }
2930 |
2931 | static bool_Bool
2932 | ssh_read_f(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2933 | {
2934 | // store the server's public part (f) for later usage
2935 | uint32_t length = tvb_get_ntohl(tvb, offset);
2936 | global_data->kex_f = ssh_kex_make_bignum(NULL((void*)0), length);
2937 | if (!global_data->kex_f) {
2938 | return false0;
2939 | }
2940 | tvb_memcpy(tvb, global_data->kex_f->data, offset + 4, length);
2941 | return true1;
2942 | }
2943 |
2944 | static int // add support of client PQ hybrid key (e)
2945 | ssh_read_e_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2946 | {
2947 | // Read length of PQ client key
2948 | uint32_t length = tvb_get_ntohl(tvb, offset);
2949 |
2950 | // Sanity check
2951 | if (length == 0 || length > 65535) {
2952 | ws_debug("ssh_read_e_pq: Invalid PQ key length: %u", length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2952, __func__, "ssh_read_e_pq: Invalid PQ key length: %u", length); } } while (0);
2953 | return false0;
2954 | }
2955 |
2956 | // Free any existing data (if dissecting multiple sessions)
2957 | wmem_free(wmem_file_scope(), global_data->kex_e_pq);
2958 |
2959 | // Allocate and store the PQ client key
2960 | global_data->kex_e_pq = (unsigned char *)wmem_alloc(wmem_file_scope(), length);
2961 | global_data->kex_e_pq_len = length;
2962 |
2963 | tvb_memcpy(tvb, global_data->kex_e_pq, offset + 4, length);
2964 |
2965 | ws_debug("Stored %u bytes of client PQ key - stored new_offset_client: %d - offset: %d", length, offset + 4 + length, offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2965, __func__, "Stored %u bytes of client PQ key - stored new_offset_client: %d - offset: %d" , length, offset + 4 + length, offset); } } while (0);
2966 | return offset + 4 + length; // consuming packet (advancing offset)
2967 | }
2968 |
2969 | static int // add support of server PQ hybrid key (f)
2970 | ssh_read_f_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2971 | {
2972 | // Read length of PQ server key
2973 | uint32_t length = tvb_get_ntohl(tvb, offset);
2974 |
2975 | // Sanity check
2976 | if (length == 0 || length > 65535) {
2977 | ws_debug("ssh_read_f_pq: Invalid PQ key length: %u", length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2977, __func__, "ssh_read_f_pq: Invalid PQ key length: %u", length); } } while (0);
2978 | return false0;
2979 | }
2980 |
2981 | // Free any existing data
2982 | wmem_free(wmem_file_scope(), global_data->kex_f_pq);
2983 |
2984 | // Allocate and store the PQ server key
2985 | global_data->kex_f_pq = (unsigned char *)wmem_alloc(wmem_file_scope(), length);
2986 | global_data->kex_f_pq_len = length;
2987 |
2988 | tvb_memcpy(tvb, global_data->kex_f_pq, offset + 4, length);
2989 |
2990 | ws_debug("Stored %u bytes of server PQ key - stored new_offset_server: %d - offset: %d", length, offset + 4 + length, offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2990, __func__, "Stored %u bytes of server PQ key - stored new_offset_server: %d - offset: %d" , length, offset + 4 + length, offset); } } while (0);
2991 | return offset + 4 + length; // consuming packet (advancing offset)
2992 | }
2993 |
2994 |
2995 | static ssh_bignum *
2996 | ssh_read_mpint(tvbuff_t *tvb, int offset)
2997 | {
2998 | // store the DH group modulo (p) for later usage
2999 | int length = tvb_get_ntohl(tvb, offset);
3000 | ssh_bignum * bn = ssh_kex_make_bignum(NULL((void*)0), length);
3001 | if (!bn) {
3002 | ws_debug("invalid bignum length %u", length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3002, __func__, "invalid bignum length %u", length); } } while (0);
3003 | return NULL((void*)0);
3004 | }
3005 | tvb_memcpy(tvb, bn->data, offset + 4, length);
3006 | return bn;
3007 | }
3008 |
3009 | static void
3010 | ssh_keylog_hash_write_secret(struct ssh_flow_data *global_data, wmem_allocator_t* tmp_allocator)
3011 | {
3012 | /*
3013 | * This computation is defined differently for each key exchange method:
3014 | * https://tools.ietf.org/html/rfc4253#page-23
3015 | * https://tools.ietf.org/html/rfc5656#page-8
3016 | * https://tools.ietf.org/html/rfc4419#page-4
3017 | * All key exchange methods:
3018 | * https://www.iana.org/assignments/ssh-parameters/ssh-parameters.xhtml#ssh-parameters-16
3019 | */
3020 |
3021 | gcry_md_hd_t hd;
3022 | ssh_key_map_entry_t *entry;
3023 | ssh_bignum *secret = NULL((void*)0);
3024 | int length;
3025 | bool_Bool client_cookie = false0;
3026 |
3027 | ssh_keylog_read_file();
10 | ← | Calling 'ssh_keylog_read_file' | →
3028 |
3029 | unsigned kex_type = ssh_kex_type(global_data->kex);
3030 | unsigned kex_hash_type = ssh_kex_hash_type(global_data->kex);
3031 |
3032 | entry = (ssh_key_map_entry_t *)g_hash_table_lookup(ssh_master_key_map, global_data->peer_data[SERVER_PEER_DATA1].bn_cookie);
3033 | if (!entry) {
3034 | entry = (ssh_key_map_entry_t *)g_hash_table_lookup(ssh_master_key_map, global_data->peer_data[CLIENT_PEER_DATA0].bn_cookie);
3035 | client_cookie = true1;
3036 | }
3037 | if (!entry) {
3038 | ws_debug("ssh decryption: no entry in keylog file for this session")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3038, __func__, "ssh decryption: no entry in keylog file for this session" ); } } while (0);
3039 | global_data->do_decrypt = false0;
3040 | return;
3041 | }
3042 |
3043 | if (!strcmp(entry->type, "PRIVATE_KEY")) {
3044 | if (client_cookie) {
3045 | secret = ssh_kex_shared_secret(kex_type, global_data->kex_f, entry->key_material, global_data->kex_gex_p);
3046 | } else {
3047 | secret = ssh_kex_shared_secret(kex_type, global_data->kex_e, entry->key_material, global_data->kex_gex_p);
3048 | }
3049 | } else if (!strcmp(entry->type, "SHARED_SECRET")) {
3050 | secret = ssh_kex_make_bignum(entry->key_material->data, entry->key_material->length);
3051 | } else {
3052 | ws_debug("ssh decryption: unknown key type in keylog file")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3052, __func__, "ssh decryption: unknown key type in keylog file" ); } } while (0);
3053 | global_data->do_decrypt = false0;
3054 | return;
3055 | }
3056 |
3057 | if (!secret) {
3058 | ws_debug("ssh decryption: no key material for this session")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3058, __func__, "ssh decryption: no key material for this session" ); } } while (0);
3059 | global_data->do_decrypt = false0;
3060 | return;
3061 | }
3062 |
3063 | // shared secret data needs to be written as an mpint, and we need it later
3064 | if (kex_type == SSH_KEX_SNTRUP761X255190x00040000 || kex_type == SSH_KEX_MLKEM768X255190x00050000) {
3065 | // Reset array while REKEY: sanitize shared_secret:
3066 | global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
3067 | // For PQ KEMs: use shared_secret as-is, whether SHARED_SECRET or PRIVATE_KEY
3068 | // Do NOT prepend 0x00 (OpenSSH already encodes correctly for PQ KEM)
3069 | ssh_hash_buffer_put_string(global_data->kex_shared_secret, secret->data, secret->length);
3070 | } else {
3071 | // For all other KEX types (e.g., curve25519, ecdh-sha2, etc.)
3072 | // Pad with 0x00 if MSB is set, to comply with mpint format (RFC 4251)
3073 | if (secret->data[0] & 0x80) { // Stored in Big endian
3074 | length = secret->length + 1;
3075 | uint8_t *tmp = (uint8_t *)wmem_alloc0(tmp_allocator, length);
3076 | memcpy(tmp + 1, secret->data, secret->length);
3077 | tmp[0] = 0;
3078 | secret->data = tmp;
3079 | secret->length = length;
3080 | }
3081 | // Reset array while REKEY: sanitize shared_secret:
3082 | global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
3083 | ssh_hash_buffer_put_string(global_data->kex_shared_secret, secret->data, secret->length);
3084 | }
3085 |
3086 | wmem_array_t * kex_gex_p = wmem_array_new(tmp_allocator, 1);
3087 | if(global_data->kex_gex_p){ssh_hash_buffer_put_string(kex_gex_p, global_data->kex_gex_p->data, global_data->kex_gex_p->length);}
3088 | wmem_array_t * kex_gex_g = wmem_array_new(tmp_allocator, 1);
3089 | if(global_data->kex_gex_g){ssh_hash_buffer_put_string(kex_gex_g, global_data->kex_gex_g->data, global_data->kex_gex_g->length);}
3090 | wmem_array_t * kex_e = wmem_array_new(tmp_allocator, 1);
3091 | if(global_data->kex_e){ssh_hash_buffer_put_string(kex_e, global_data->kex_e->data, global_data->kex_e->length);}
3092 | wmem_array_t * kex_f = wmem_array_new(tmp_allocator, 1);
3093 | if(global_data->kex_f){ssh_hash_buffer_put_string(kex_f, global_data->kex_f->data, global_data->kex_f->length);}
3094 | wmem_array_t * kex_e_pq = wmem_array_new(tmp_allocator, 1);
3095 | if(global_data->kex_e_pq){ssh_hash_buffer_put_string(kex_e_pq, global_data->kex_e_pq, global_data->kex_e_pq_len);}
3096 | wmem_array_t * kex_f_pq = wmem_array_new(tmp_allocator, 1);
3097 | if(global_data->kex_f_pq){ssh_hash_buffer_put_string(kex_f_pq, global_data->kex_f_pq, global_data->kex_f_pq_len);}
3098 |
3099 | wmem_array_t * kex_hash_buffer = wmem_array_new(tmp_allocator, 1);
3100 | ssh_print_data("client_version", (const unsigned char *)wmem_array_get_raw(global_data->kex_client_version), wmem_array_get_count(global_data->kex_client_version));
3101 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_client_version), wmem_array_get_count(global_data->kex_client_version));
3102 | ssh_print_data("server_version", (const unsigned char *)wmem_array_get_raw(global_data->kex_server_version), wmem_array_get_count(global_data->kex_server_version));
3103 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_server_version), wmem_array_get_count(global_data->kex_server_version));
3104 | ssh_print_data("client_key_exchange_init", (const unsigned char *)wmem_array_get_raw(global_data->kex_client_key_exchange_init), wmem_array_get_count(global_data->kex_client_key_exchange_init));
3105 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_client_key_exchange_init), wmem_array_get_count(global_data->kex_client_key_exchange_init));
3106 | ssh_print_data("server_key_exchange_init", (const unsigned char *)wmem_array_get_raw(global_data->kex_server_key_exchange_init), wmem_array_get_count(global_data->kex_server_key_exchange_init));
3107 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_server_key_exchange_init), wmem_array_get_count(global_data->kex_server_key_exchange_init));
3108 | ssh_print_data("kex_server_host_key_blob", (const unsigned char *)wmem_array_get_raw(global_data->kex_server_host_key_blob), wmem_array_get_count(global_data->kex_server_host_key_blob));
3109 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_server_host_key_blob), wmem_array_get_count(global_data->kex_server_host_key_blob));
3110 | if(kex_type==SSH_KEX_DH_GEX0x00020000){
3111 | ssh_print_data("kex_gex_bits_min", (const unsigned char *)wmem_array_get_raw(global_data->kex_gex_bits_min), wmem_array_get_count(global_data->kex_gex_bits_min));
3112 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_gex_bits_min), wmem_array_get_count(global_data->kex_gex_bits_min));
3113 | ssh_print_data("kex_gex_bits_req", (const unsigned char *)wmem_array_get_raw(global_data->kex_gex_bits_req), wmem_array_get_count(global_data->kex_gex_bits_req));
3114 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_gex_bits_req), wmem_array_get_count(global_data->kex_gex_bits_req));
3115 | ssh_print_data("kex_gex_bits_max", (const unsigned char *)wmem_array_get_raw(global_data->kex_gex_bits_max), wmem_array_get_count(global_data->kex_gex_bits_max));
3116 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_gex_bits_max), wmem_array_get_count(global_data->kex_gex_bits_max));
3117 | ssh_print_data("key modulo (p)", (const unsigned char *)wmem_array_get_raw(kex_gex_p), wmem_array_get_count(kex_gex_p));
3118 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_gex_p), wmem_array_get_count(kex_gex_p));
3119 | ssh_print_data("key base (g)", (const unsigned char *)wmem_array_get_raw(kex_gex_g), wmem_array_get_count(kex_gex_g));
3120 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_gex_g), wmem_array_get_count(kex_gex_g));
3121 | ssh_print_data("key client (e)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3122 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3123 | ssh_print_data("key server (f)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3124 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3125 | }
3126 | if(kex_type==SSH_KEX_DH_GROUP10x00030001 || kex_type==SSH_KEX_DH_GROUP140x00030014 || kex_type==SSH_KEX_DH_GROUP160x00030016 || kex_type==SSH_KEX_DH_GROUP180x00030018){
3127 | ssh_print_data("key client (e)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3128 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3129 | ssh_print_data("key server (f)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3130 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3131 | }
3132 | if(kex_type==SSH_KEX_CURVE255190x00010000){
3133 | ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3134 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3135 | ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3136 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3137 | }
3138 | if (kex_type==SSH_KEX_SNTRUP761X255190x00040000){ // Add support of sntrup761x25519
3139 | ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3140 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3141 | ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3142 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3143 | ws_noisy("Switch to SSH_KEX_SNTRUP761X25519")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 3143, __func__, "Switch to SSH_KEX_SNTRUP761X25519"); } } while (0);
3144 | }
3145 | if (kex_type==SSH_KEX_MLKEM768X255190x00050000){ // Add support of mlkem768x25519
3146 | ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3147 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3148 | ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3149 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3150 | ws_noisy("Switch to SSH_KEX_MLKEM768X25519")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 3150, __func__, "Switch to SSH_KEX_MLKEM768X25519"); } } while (0);
3151 | }
3152 | ssh_print_data("shared secret", (const unsigned char *)wmem_array_get_raw(global_data->kex_shared_secret), wmem_array_get_count(global_data->kex_shared_secret));
3153 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_shared_secret), wmem_array_get_count(global_data->kex_shared_secret));
3154 |
3155 | ssh_print_data("exchange", (const unsigned char *)wmem_array_get_raw(kex_hash_buffer), wmem_array_get_count(kex_hash_buffer));
3156 |
3157 | unsigned hash_len = 32;
3158 | if(kex_hash_type==SSH_KEX_HASH_SHA11) {
3159 | gcry_md_open(&hd, GCRY_MD_SHA1, 0);
3160 | hash_len = 20;
3161 | } else if(kex_hash_type==SSH_KEX_HASH_SHA2562) {
3162 | gcry_md_open(&hd, GCRY_MD_SHA256, 0);
3163 | hash_len = 32;
3164 | } else if(kex_hash_type==SSH_KEX_HASH_SHA5124) {
3165 | gcry_md_open(&hd, GCRY_MD_SHA512, 0);
3166 | hash_len = 64;
3167 | } else {
3168 | ws_debug("kex_hash_type type %d not supported", kex_hash_type)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3168, __func__, "kex_hash_type type %d not supported", kex_hash_type ); } } while (0);
3169 | return;
3170 | }
3171 | uint8_t *exchange_hash = (uint8_t *)wmem_alloc0(wmem_file_scope(), hash_len);
3172 | gcry_md_write(hd, wmem_array_get_raw(kex_hash_buffer), wmem_array_get_count(kex_hash_buffer));
3173 | memcpy(exchange_hash, gcry_md_read(hd, 0), hash_len);
3174 | gcry_md_close(hd);
3175 | ssh_print_data("hash", exchange_hash, hash_len);
3176 | global_data->secret = secret;
3177 | ssh_derive_symmetric_keys(secret, exchange_hash, hash_len, global_data);
3178 | }
3179 |
3180 | // the purpose of this function is to deal with all different kex methods
3181 | static ssh_bignum *
3182 | ssh_kex_shared_secret(int kex_type, ssh_bignum *pub, ssh_bignum *priv, ssh_bignum *modulo)
3183 | {
3184 | DISSECTOR_ASSERT(pub != NULL)((void) ((pub != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c" , 3184, "pub != ((void*)0)"))));
3185 | DISSECTOR_ASSERT(priv != NULL)((void) ((priv != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c" , 3185, "priv != ((void*)0)"))));
3186 |
3187 | ssh_bignum *secret = ssh_kex_make_bignum(NULL((void*)0), pub->length);
3188 | if (!secret) {
3189 | ws_debug("invalid key length %u", pub->length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3189, __func__, "invalid key length %u", pub->length); } } while (0);
3190 | return NULL((void*)0);
3191 | }
3192 |
3193 | if(kex_type==SSH_KEX_DH_GEX0x00020000){
3194 | if (modulo == NULL((void*)0)) {
3195 | ws_debug("Missing group modulo")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3195, __func__, "Missing group modulo"); } } while (0);
3196 | return NULL((void*)0);
3197 | }
3198 | gcry_mpi_t b = NULL((void*)0);
3199 | gcry_mpi_scan(&b, GCRYMPI_FMT_USG, pub->data, pub->length, NULL((void*)0));
3200 | gcry_mpi_t d = NULL((void*)0), e = NULL((void*)0), m = NULL((void*)0);
3201 | size_t result_len = 0;
3202 | d = gcry_mpi_new(pub->length*8);
3203 | gcry_mpi_scan(&e, GCRYMPI_FMT_USG, priv->data, priv->length, NULL((void*)0));
3204 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, modulo->data, modulo->length, NULL((void*)0));
3205 | gcry_mpi_powm(d, b, e, m); // gcry_mpi_powm(d, b, e, m) => d = b^e % m
3206 | gcry_mpi_print(GCRYMPI_FMT_USG, secret->data, secret->length, &result_len, d);
3207 | secret->length = (unsigned)result_len; // Should not be larger than what fits in a 32-bit unsigned integer...
3208 | gcry_mpi_release(d);
3209 | gcry_mpi_release(b);
3210 | gcry_mpi_release(e);
3211 | gcry_mpi_release(m);
3212 |
3213 | }else if(kex_type==SSH_KEX_DH_GROUP10x00030001 || kex_type==SSH_KEX_DH_GROUP140x00030014 || kex_type==SSH_KEX_DH_GROUP160x00030016 || kex_type==SSH_KEX_DH_GROUP180x00030018){
3214 | gcry_mpi_t m = NULL((void*)0);
3215 | if(kex_type==SSH_KEX_DH_GROUP10x00030001){
3216 | static const uint8_t p[] = {
3217 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3218 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3219 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3220 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3221 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3222 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3223 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3224 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE6, 0x53, 0x81, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3225 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3226 | }else if(kex_type==SSH_KEX_DH_GROUP140x00030014){
3227 | //p:
3228 | static const uint8_t p[] = {
3229 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3230 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3231 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3232 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3233 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3234 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3235 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3236 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3237 | 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3238 | 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3239 | 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3240 | 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3241 | 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3242 | 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3243 | 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3244 | 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAC, 0xAA, 0x68, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
3245 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3246 | }else if(kex_type==SSH_KEX_DH_GROUP160x00030016){
3247 | //p:
3248 | static const uint8_t p[] = {
3249 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3250 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3251 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3252 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3253 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3254 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3255 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3256 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3257 | 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3258 | 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3259 | 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3260 | 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3261 | 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3262 | 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3263 | 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3264 | 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D, 0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33,
3265 | 0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64, 0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A,
3266 | 0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, 0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7,
3267 | 0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, 0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D,
3268 | 0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B, 0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64,
3269 | 0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64, 0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C,
3270 | 0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, 0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2,
3271 | 0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, 0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E,
3272 | 0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01, 0x1A, 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7,
3273 | 0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA, 0x5B, 0x26, 0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C,
3274 | 0x1A, 0x94, 0x68, 0x34, 0xB6, 0x15, 0x0B, 0xDA, 0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,
3275 | 0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9, 0x2E, 0x8E, 0xFC, 0x14, 0x1F, 0xBE, 0xCA, 0xA6,
3276 | 0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D, 0x99, 0xB2, 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2,
3277 | 0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7, 0xED, 0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF,
3278 | 0xB8, 0x1B, 0xDD, 0x76, 0x21, 0x70, 0x48, 0x1C, 0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9,
3279 | 0x93, 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1, 0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6, 0xC0, 0x8F,
3280 | 0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x06, 0x31, 0x99, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3281 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3282 | }else if(kex_type==SSH_KEX_DH_GROUP180x00030018){
3283 | //p:
3284 | static const uint8_t p[] = {
3285 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3286 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3287 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3288 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3289 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3290 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3291 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3292 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3293 | 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3294 | 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3295 | 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3296 | 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3297 | 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3298 | 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3299 | 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3300 | 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D, 0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33,
3301 | 0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64, 0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A,
3302 | 0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, 0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7,
3303 | 0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, 0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D,
3304 | 0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B, 0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64,
3305 | 0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64, 0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C,
3306 | 0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, 0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2,
3307 | 0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, 0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E,
3308 | 0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01, 0x1A, 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7,
3309 | 0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA, 0x5B, 0x26, 0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C,
3310 | 0x1A, 0x94, 0x68, 0x34, 0xB6, 0x15, 0x0B, 0xDA, 0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,
3311 | 0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9, 0x2E, 0x8E, 0xFC, 0x14, 0x1F, 0xBE, 0xCA, 0xA6,
3312 | 0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D, 0x99, 0xB2, 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2,
3313 | 0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7, 0xED, 0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF,
3314 | 0xB8, 0x1B, 0xDD, 0x76, 0x21, 0x70, 0x48, 0x1C, 0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9,
3315 | 0x93, 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1, 0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6, 0xC0, 0x8F,
3316 | 0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x02, 0x84, 0x92, 0x36, 0xC3, 0xFA, 0xB4, 0xD2, 0x7C, 0x70, 0x26,
3317 | 0xC1, 0xD4, 0xDC, 0xB2, 0x60, 0x26, 0x46, 0xDE, 0xC9, 0x75, 0x1E, 0x76, 0x3D, 0xBA, 0x37, 0xBD,
3318 | 0xF8, 0xFF, 0x94, 0x06, 0xAD, 0x9E, 0x53, 0x0E, 0xE5, 0xDB, 0x38, 0x2F, 0x41, 0x30, 0x01, 0xAE,
3319 | 0xB0, 0x6A, 0x53, 0xED, 0x90, 0x27, 0xD8, 0x31, 0x17, 0x97, 0x27, 0xB0, 0x86, 0x5A, 0x89, 0x18,
3320 | 0xDA, 0x3E, 0xDB, 0xEB, 0xCF, 0x9B, 0x14, 0xED, 0x44, 0xCE, 0x6C, 0xBA, 0xCE, 0xD4, 0xBB, 0x1B,
3321 | 0xDB, 0x7F, 0x14, 0x47, 0xE6, 0xCC, 0x25, 0x4B, 0x33, 0x20, 0x51, 0x51, 0x2B, 0xD7, 0xAF, 0x42,
3322 | 0x6F, 0xB8, 0xF4, 0x01, 0x37, 0x8C, 0xD2, 0xBF, 0x59, 0x83, 0xCA, 0x01, 0xC6, 0x4B, 0x92, 0xEC,
3323 | 0xF0, 0x32, 0xEA, 0x15, 0xD1, 0x72, 0x1D, 0x03, 0xF4, 0x82, 0xD7, 0xCE, 0x6E, 0x74, 0xFE, 0xF6,
3324 | 0xD5, 0x5E, 0x70, 0x2F, 0x46, 0x98, 0x0C, 0x82, 0xB5, 0xA8, 0x40, 0x31, 0x90, 0x0B, 0x1C, 0x9E,
3325 | 0x59, 0xE7, 0xC9, 0x7F, 0xBE, 0xC7, 0xE8, 0xF3, 0x23, 0xA9, 0x7A, 0x7E, 0x36, 0xCC, 0x88, 0xBE,
3326 | 0x0F, 0x1D, 0x45, 0xB7, 0xFF, 0x58, 0x5A, 0xC5, 0x4B, 0xD4, 0x07, 0xB2, 0x2B, 0x41, 0x54, 0xAA,
3327 | 0xCC, 0x8F, 0x6D, 0x7E, 0xBF, 0x48, 0xE1, 0xD8, 0x14, 0xCC, 0x5E, 0xD2, 0x0F, 0x80, 0x37, 0xE0,
3328 | 0xA7, 0x97, 0x15, 0xEE, 0xF2, 0x9B, 0xE3, 0x28, 0x06, 0xA1, 0xD5, 0x8B, 0xB7, 0xC5, 0xDA, 0x76,
3329 | 0xF5, 0x50, 0xAA, 0x3D, 0x8A, 0x1F, 0xBF, 0xF0, 0xEB, 0x19, 0xCC, 0xB1, 0xA3, 0x13, 0xD5, 0x5C,
3330 | 0xDA, 0x56, 0xC9, 0xEC, 0x2E, 0xF2, 0x96, 0x32, 0x38, 0x7F, 0xE8, 0xD7, 0x6E, 0x3C, 0x04, 0x68,
3331 | 0x04, 0x3E, 0x8F, 0x66, 0x3F, 0x48, 0x60, 0xEE, 0x12, 0xBF, 0x2D, 0x5B, 0x0B, 0x74, 0x74, 0xD6,
3332 | 0xE6, 0x94, 0xF9, 0x1E, 0x6D, 0xBE, 0x11, 0x59, 0x74, 0xA3, 0x92, 0x6F, 0x12, 0xFE, 0xE5, 0xE4,
3333 | 0x38, 0x77, 0x7C, 0xB6, 0xA9, 0x32, 0xDF, 0x8C, 0xD8, 0xBE, 0xC4, 0xD0, 0x73, 0xB9, 0x31, 0xBA,
3334 | 0x3B, 0xC8, 0x32, 0xB6, 0x8D, 0x9D, 0xD3, 0x00, 0x74, 0x1F, 0xA7, 0xBF, 0x8A, 0xFC, 0x47, 0xED,
3335 | 0x25, 0x76, 0xF6, 0x93, 0x6B, 0xA4, 0x24, 0x66, 0x3A, 0xAB, 0x63, 0x9C, 0x5A, 0xE4, 0xF5, 0x68,
3336 | 0x34, 0x23, 0xB4, 0x74, 0x2B, 0xF1, 0xC9, 0x78, 0x23, 0x8F, 0x16, 0xCB, 0xE3, 0x9D, 0x65, 0x2D,
3337 | 0xE3, 0xFD, 0xB8, 0xBE, 0xFC, 0x84, 0x8A, 0xD9, 0x22, 0x22, 0x2E, 0x04, 0xA4, 0x03, 0x7C, 0x07,
3338 | 0x13, 0xEB, 0x57, 0xA8, 0x1A, 0x23, 0xF0, 0xC7, 0x34, 0x73, 0xFC, 0x64, 0x6C, 0xEA, 0x30, 0x6B,
3339 | 0x4B, 0xCB, 0xC8, 0x86, 0x2F, 0x83, 0x85, 0xDD, 0xFA, 0x9D, 0x4B, 0x7F, 0xA2, 0xC0, 0x87, 0xE8,
3340 | 0x79, 0x68, 0x33, 0x03, 0xED, 0x5B, 0xDD, 0x3A, 0x06, 0x2B, 0x3C, 0xF5, 0xB3, 0xA2, 0x78, 0xA6,
3341 | 0x6D, 0x2A, 0x13, 0xF8, 0x3F, 0x44, 0xF8, 0x2D, 0xDF, 0x31, 0x0E, 0xE0, 0x74, 0xAB, 0x6A, 0x36,
3342 | 0x45, 0x97, 0xE8, 0x99, 0xA0, 0x25, 0x5D, 0xC1, 0x64, 0xF3, 0x1C, 0xC5, 0x08, 0x46, 0x85, 0x1D,
3343 | 0xF9, 0xAB, 0x48, 0x19, 0x5D, 0xED, 0x7E, 0xA1, 0xB1, 0xD5, 0x10, 0xBD, 0x7E, 0xE7, 0x4D, 0x73,
3344 | 0xFA, 0xF3, 0x6B, 0xC3, 0x1E, 0xCF, 0xA2, 0x68, 0x35, 0x90, 0x46, 0xF4, 0xEB, 0x87, 0x9F, 0x92,
3345 | 0x40, 0x09, 0x43, 0x8B, 0x48, 0x1C, 0x6C, 0xD7, 0x88, 0x9A, 0x00, 0x2E, 0xD5, 0xEE, 0x38, 0x2B,
3346 | 0xC9, 0x19, 0x0D, 0xA6, 0xFC, 0x02, 0x6E, 0x47, 0x95, 0x58, 0xE4, 0x47, 0x56, 0x77, 0xE9, 0xAA,
3347 | 0x9E, 0x30, 0x50, 0xE2, 0x76, 0x56, 0x94, 0xDF, 0xC8, 0x1F, 0x56, 0xE8, 0x80, 0xB9, 0x6E, 0x71,
3348 | 0x60, 0xC9, 0x80, 0xDD, 0x98, 0xED, 0xD3, 0xDF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3349 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3350 | }
3351 |
3352 | gcry_mpi_t b = NULL((void*)0);
3353 | gcry_mpi_scan(&b, GCRYMPI_FMT_USG, pub->data, pub->length, NULL((void*)0));
3354 | gcry_mpi_t d = NULL((void*)0), e = NULL((void*)0);
3355 | size_t result_len = 0;
3356 | d = gcry_mpi_new(pub->length*8);
3357 | gcry_mpi_scan(&e, GCRYMPI_FMT_USG, priv->data, priv->length, NULL((void*)0));
3358 | gcry_mpi_powm(d, b, e, m); // gcry_mpi_powm(d, b, e, m) => d = b^e % m
3359 | gcry_mpi_print(GCRYMPI_FMT_USG, secret->data, secret->length, &result_len, d);
3360 | secret->length = (unsigned)result_len; // Should not be larger than what fits in a 32-bit unsigned integer...
3361 | gcry_mpi_release(d);
3362 | gcry_mpi_release(b);
3363 | gcry_mpi_release(e);
3364 | gcry_mpi_release(m);
3365 | }else if(kex_type==SSH_KEX_CURVE255190x00010000){
3366 | if (crypto_scalarmult_curve25519(secret->data, priv->data, pub->data)) {
3367 | ws_debug("curve25519: can't compute shared secret")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3367, __func__, "curve25519: can't compute shared secret"); } } while (0);
3368 | return NULL((void*)0);
3369 | }
3370 | } else {
3371 | ws_debug("kex_type type %d not supported", kex_type)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3371, __func__, "kex_type type %d not supported", kex_type) ; } } while (0);
3372 | return 0;
3373 | }
3374 |
3375 | return secret;
3376 | }
3377 |
3378 | static char *
3379 | ssh_string(wmem_allocator_t* allocator, const uint8_t *string, unsigned length)
3380 | {
3381 | char *ssh_string = (char *)wmem_alloc(allocator, length + 4);
3382 | ssh_string[0] = (length >> 24) & 0xff;
3383 | ssh_string[1] = (length >> 16) & 0xff;
3384 | ssh_string[2] = (length >> 8) & 0xff;
3385 | ssh_string[3] = length & 0xff;
3386 | memcpy(ssh_string + 4, string, length);
3387 | return ssh_string;
3388 | }
3389 |
3390 | static void
3391 | ssh_hash_buffer_put_string(wmem_array_t *buffer, const uint8_t *string,
3392 | unsigned length)
3393 | {
3394 | if (!buffer) {
3395 | return;
3396 | }
3397 |
3398 | char *string_with_length = ssh_string(wmem_array_get_allocator(buffer), string, length);
3399 | wmem_array_append(buffer, string_with_length, length + 4);
3400 | }
3401 |
3402 | static void
3403 | ssh_hash_buffer_put_uint32(wmem_array_t *buffer, unsigned val)
3404 | {
3405 | if (!buffer) {
3406 | return;
3407 | }
3408 |
3409 | char buf[4];
3410 | buf[0] = (val >> 24); buf[1] = (val >> 16); buf[2] = (val >> 8); buf[3] = (val >> 0);
3411 | wmem_array_append(buffer, buf, 4);
3412 | }
3413 |
3414 | static void ssh_derive_symmetric_keys(ssh_bignum *secret, uint8_t *exchange_hash,
3415 | unsigned hash_length, struct ssh_flow_data *global_data)
3416 | {
3417 | if (!global_data->session_id) {
3418 | global_data->session_id = exchange_hash;
3419 | global_data->session_id_length = hash_length;
3420 | }
3421 |
3422 | unsigned int we_need = 0;
3423 | for(int peer_cnt=0;peer_cnt<2;peer_cnt++){
3424 | struct ssh_peer_data * peer_data = &global_data->peer_data[peer_cnt];
3425 | // required size of key depends on cipher used. chacha20 wants 64 bytes
3426 | unsigned need = 0;
3427 | if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3428 | need = 64;
3429 | } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id || CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id) {
3430 | need = 16;
3431 | } else if (CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id) {
3432 | need = 24;
3433 | } else if (CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
3434 | need = 32;
3435 | } else {
3436 | ssh_debug_printf("ssh: cipher (%d) is unknown or not set\n", peer_data->cipher_id);
3437 | ssh_debug_flush();
3438 | }
3439 | if(peer_data->mac_id == CIPHER_MAC_SHA2_2560x00020001){
3440 | need = 32;
3441 | }else{
3442 | ssh_debug_printf("ssh: MAC (%d) is unknown or not set\n", peer_data->mac_id);
3443 | ssh_debug_flush();
3444 | }
3445 | if (we_need<need) {
3446 | we_need = need;
3447 | }
3448 | }
3449 |
3450 | for (int i = 0; i < 6; i ++) {
3451 | ssh_derive_symmetric_key(secret, exchange_hash, hash_length,
3452 | 'A' + i, &global_data->new_keys[i], global_data, we_need);
3453 | if(i==0){ ssh_print_data("Initial IV client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3454 | }else if(i==1){ ssh_print_data("Initial IV server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3455 | }else if(i==2){ ssh_print_data("Encryption key client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3456 | }else if(i==3){ ssh_print_data("Encryption key server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3457 | }else if(i==4){ ssh_print_data("Integrity key client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3458 | }else if(i==5){ ssh_print_data("Integrity key server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3459 | }
3460 | }
3461 | }
3462 |
3463 | static void ssh_derive_symmetric_key(ssh_bignum *secret, const uint8_t *exchange_hash,
3464 | unsigned hash_length, char id, ssh_bignum *result_key,
3465 | struct ssh_flow_data *global_data, unsigned we_need)
3466 | {
3467 | gcry_md_hd_t hd;
3468 |
3469 | unsigned kex_hash_type = ssh_kex_hash_type(global_data->kex);
3470 | int algo = GCRY_MD_SHA256;
3471 | if(kex_hash_type==SSH_KEX_HASH_SHA11){
3472 | algo = GCRY_MD_SHA1;
3473 | }else if(kex_hash_type==SSH_KEX_HASH_SHA2562){
3474 | algo = GCRY_MD_SHA256;
3475 | }else if(kex_hash_type==SSH_KEX_HASH_SHA5124){
3476 | algo = GCRY_MD_SHA512;
3477 | }
3478 | unsigned len = gcry_md_get_algo_dlen(algo);
3479 |
3480 | result_key->data = (unsigned char *)wmem_alloc(wmem_file_scope(), we_need);
3481 |
3482 | char *secret_with_length = ssh_string(NULL((void*)0), secret->data, secret->length);
3483 |
3484 | if (gcry_md_open(&hd, algo, 0) == 0) {
3485 | gcry_md_write(hd, secret_with_length, secret->length + 4);
3486 | gcry_md_write(hd, exchange_hash, hash_length);
3487 | gcry_md_putc(hd, id)do { gcry_md_hd_t h__ = (hd); if( (h__)->bufpos == (h__)-> bufsize ) gcry_md_write( (h__), ((void*)0), 0 ); (h__)->buf [(h__)->bufpos++] = (id) & 0xff; } while(0);
3488 | gcry_md_write(hd, global_data->session_id, hash_length);
3489 | unsigned add_length = MIN(len, we_need)(((len) < (we_need)) ? (len) : (we_need));
3490 | memcpy(result_key->data, gcry_md_read(hd, 0), add_length);
3491 | gcry_md_close(hd);
3492 | }
3493 |
3494 | // expand key
3495 | for (unsigned have = len; have < we_need; have += len) {
3496 | if (gcry_md_open(&hd, algo, 0) == 0) {
3497 | gcry_md_write(hd, secret_with_length, secret->length + 4);
3498 | gcry_md_write(hd, exchange_hash, hash_length);
3499 | gcry_md_write(hd, result_key->data+have-len, len);
3500 | unsigned add_length = MIN(len, we_need - have)(((len) < (we_need - have)) ? (len) : (we_need - have));
3501 | memcpy(result_key->data+have, gcry_md_read(hd, 0), add_length);
3502 | gcry_md_close(hd);
3503 | }
3504 | }
3505 | wmem_free(NULL((void*)0), secret_with_length);
3506 |
3507 | result_key->length = we_need;
3508 | }
3509 |
3510 | static void
3511 | ssh_choose_enc_mac(struct ssh_flow_data *global_data)
3512 | {
3513 | for(int peer_cnt=0;peer_cnt<2;peer_cnt++){
3514 | struct ssh_peer_data * peer_data = &global_data->peer_data[peer_cnt];
3515 | ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].enc_proposals[peer_cnt],
3516 | global_data->peer_data[SERVER_PEER_DATA1].enc_proposals[peer_cnt],
3517 | &peer_data->enc);
3518 | /* some ciphers have their own MAC so the "negotiated" one is meaningless */
3519 | if(peer_data->enc && (0 == strcmp(peer_data->enc, "aes128-gcm@openssh.com") ||
3520 | 0 == strcmp(peer_data->enc, "aes256-gcm@openssh.com"))) {
3521 | peer_data->mac = wmem_strdup(wmem_file_scope(), (const char *)"<implicit>");
3522 | peer_data->mac_length = 16;
3523 | peer_data->length_is_plaintext = 1;
3524 | }
3525 | else if(peer_data->enc && 0 == strcmp(peer_data->enc, "chacha20-poly1305@openssh.com")) {
3526 | peer_data->mac = wmem_strdup(wmem_file_scope(), (const char *)"<implicit>");
3527 | peer_data->mac_length = 16;
3528 | }
3529 | else {
3530 | ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].mac_proposals[peer_cnt],
3531 | global_data->peer_data[SERVER_PEER_DATA1].mac_proposals[peer_cnt],
3532 | &peer_data->mac);
3533 | ssh_set_mac_length(peer_data);
3534 | }
3535 | ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].comp_proposals[peer_cnt],
3536 | global_data->peer_data[SERVER_PEER_DATA1].comp_proposals[peer_cnt],
3537 | &peer_data->comp);
3538 | }
3539 |
3540 | ssh_decryption_set_cipher_id(&global_data->peer_data[CLIENT_PEER_DATA0]);
3541 | ssh_decryption_set_mac_id(&global_data->peer_data[CLIENT_PEER_DATA0]);
3542 | ssh_decryption_set_cipher_id(&global_data->peer_data[SERVER_PEER_DATA1]);
3543 | ssh_decryption_set_mac_id(&global_data->peer_data[SERVER_PEER_DATA1]);
3544 | }
3545 |
3546 | static void
3547 | ssh_decryption_set_cipher_id(struct ssh_peer_data *peer)
3548 | {
3549 | char *cipher_name = peer->enc;
3550 |
3551 | if (!cipher_name) {
3552 | peer->cipher = NULL((void*)0);
3553 | ws_debug("ERROR: cipher_name is NULL")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3553, __func__, "ERROR: cipher_name is NULL"); } } while (0 );
3554 | } else if (0 == strcmp(cipher_name, "chacha20-poly1305@openssh.com")) { // add chacha20-poly1305@openssh.com
3555 | peer->cipher_id = GCRY_CIPHER_CHACHA20;
3556 | } else if (0 == strcmp(cipher_name, "chacha20-poly1305")) { // add chacha20-poly1305
3557 | peer->cipher_id = GCRY_CIPHER_CHACHA20;
3558 | } else if (0 == strcmp(cipher_name, "aes128-gcm@openssh.com")) {
3559 | peer->cipher_id = CIPHER_AES128_GCM0x00040001;
3560 | } else if (0 == strcmp(cipher_name, "aes128-gcm")) {
3561 | peer->cipher_id = CIPHER_AES128_GCM0x00040001;
3562 | } else if (0 == strcmp(cipher_name, "aes256-gcm@openssh.com")) {
3563 | peer->cipher_id = CIPHER_AES256_GCM0x00040004;
3564 | } else if (0 == strcmp(cipher_name, "aes256-gcm")) {
3565 | peer->cipher_id = CIPHER_AES256_GCM0x00040004;
3566 | } else if (0 == strcmp(cipher_name, "aes128-cbc")) {
3567 | peer->cipher_id = CIPHER_AES128_CBC0x00020001;
3568 | } else if (0 == strcmp(cipher_name, "aes192-cbc")) {
3569 | peer->cipher_id = CIPHER_AES192_CBC0x00020002;
3570 | } else if (0 == strcmp(cipher_name, "aes256-cbc")) {
3571 | peer->cipher_id = CIPHER_AES256_CBC0x00020004;
3572 | } else if (0 == strcmp(cipher_name, "aes128-ctr")) {
3573 | peer->cipher_id = CIPHER_AES128_CTR0x00010001;
3574 | } else if (0 == strcmp(cipher_name, "aes192-ctr")) {
3575 | peer->cipher_id = CIPHER_AES192_CTR0x00010003;
3576 | } else if (0 == strcmp(cipher_name, "aes256-ctr")) {
3577 | peer->cipher_id = CIPHER_AES256_CTR0x00010004;
3578 | } else if (0 == strcmp(cipher_name, "none")) {
3579 | peer->cipher_id = CIPHER_NULL0x00080000;
3580 | peer->length_is_plaintext = 1;
3581 | } else {
3582 | peer->cipher = NULL((void*)0);
3583 | ws_debug("decryption not supported: %s", cipher_name)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3583, __func__, "decryption not supported: %s", cipher_name ); } } while (0);
3584 | }
3585 | }
3586 |
3587 | static void
3588 | ssh_decryption_set_mac_id(struct ssh_peer_data *peer)
3589 | {
3590 | char *mac_name = peer->mac;
3591 |
3592 | if (!mac_name) {
3593 | peer->mac = NULL((void*)0);
3594 | ws_debug("ERROR: mac_name is NULL")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3594, __func__, "ERROR: mac_name is NULL"); } } while (0);
3595 | } else if (0 == strcmp(mac_name, "hmac-sha2-256")) {
3596 | peer->mac_id = CIPHER_MAC_SHA2_2560x00020001;
3597 | } else {
3598 | ws_debug("decryption MAC not supported: %s", mac_name)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3598, __func__, "decryption MAC not supported: %s", mac_name ); } } while (0);
3599 | }
3600 | }
3601 |
3602 | static bool_Bool
3603 | gcry_cipher_destroy_cb(wmem_allocator_t *allocator _U___attribute__((unused)), wmem_cb_event_t event _U___attribute__((unused)), void *user_data)
3604 | {
3605 | gcry_cipher_hd_t hd = (gcry_cipher_hd_t)user_data;
3606 |
3607 | gcry_cipher_close(hd);
3608 |
3609 | return false0;
3610 | }
3611 |
3612 | static void
3613 | ssh_decryption_setup_cipher(struct ssh_peer_data *peer_data,
3614 | ssh_bignum *iv, ssh_bignum *key)
3615 | {
3616 | gcry_error_t err;
3617 | gcry_cipher_hd_t *hd1, *hd2;
3618 |
3619 | hd1 = &peer_data->cipher;
3620 | hd2 = &peer_data->cipher_2;
3621 |
3622 | if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3623 | if (gcry_cipher_open(hd1, GCRY_CIPHER_CHACHA20, GCRY_CIPHER_MODE_STREAM, 0) ||
3624 | gcry_cipher_open(hd2, GCRY_CIPHER_CHACHA20, GCRY_CIPHER_MODE_STREAM, 0)) {
3625 | gcry_cipher_close(*hd1);
3626 | gcry_cipher_close(*hd2);
3627 | ws_debug("ssh: can't open chacha20 cipher handles")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3627, __func__, "ssh: can't open chacha20 cipher handles"); } } while (0);
3628 | return;
3629 | }
3630 |
3631 | uint8_t k1[32];
3632 | uint8_t k2[32];
3633 | if(key->data){
3634 | memcpy(k1, key->data, 32);
3635 | memcpy(k2, key->data + 32, 32);
3636 | }else{
3637 | memset(k1, 0, 32);
3638 | memset(k2, 0, 32);
3639 | }
3640 |
3641 | ssh_debug_printf("ssh: cipher is chacha20\n");
3642 | ssh_print_data("key 1", k1, 32);
3643 | ssh_print_data("key 2", k2, 32);
3644 |
3645 | if ((err = gcry_cipher_setkey(*hd1, k1, 32))) {
3646 | gcry_cipher_close(*hd1);
3647 | ws_debug("ssh: can't set chacha20 cipher key %s", gcry_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3647, __func__, "ssh: can't set chacha20 cipher key %s", gcry_strerror (err)); } } while (0);
3648 | return;
3649 | }
3650 |
3651 | if ((err = gcry_cipher_setkey(*hd2, k2, 32))) {
3652 | gcry_cipher_close(*hd1);
3653 | gcry_cipher_close(*hd2);
3654 | ws_debug("ssh: can't set chacha20 cipher key %s", gcry_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3654, __func__, "ssh: can't set chacha20 cipher key %s", gcry_strerror (err)); } } while (0);
3655 | return;
3656 | }
3657 |
3658 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3659 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd2);
3660 |
3661 | } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id) {
3662 | int iKeyLen = CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id?16:CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id?24:32;
3663 | if (gcry_cipher_open(hd1, CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id?GCRY_CIPHER_AES128GCRY_CIPHER_AES:CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id?GCRY_CIPHER_AES192:GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_CBC, 0)) {
3664 | gcry_cipher_close(*hd1);
3665 | ws_debug("ssh: can't open aes%d cipher handle", iKeyLen*8)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3665, __func__, "ssh: can't open aes%d cipher handle", iKeyLen *8); } } while (0);
3666 | return;
3667 | }
3668 | uint8_t k1[32], iv1[16];
3669 | if(key->data){
3670 | memcpy(k1, key->data, iKeyLen);
3671 | }else{
3672 | memset(k1, 0, iKeyLen);
3673 | }
3674 | if(iv->data){
3675 | memcpy(iv1, iv->data, 16);
3676 | }else{
3677 | memset(iv1, 0, 16);
3678 | }
3679 |
3680 | ssh_debug_printf("ssh: cipher is aes%d-cbc\n", iKeyLen*8);
3681 | ssh_print_data("key", k1, iKeyLen);
3682 | ssh_print_data("iv", iv1, 16);
3683 |
3684 | if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3685 | gcry_cipher_close(*hd1);
3686 | ws_debug("ssh: can't set aes%d cipher key", iKeyLen*8)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3686, __func__, "ssh: can't set aes%d cipher key", iKeyLen* 8); } } while (0);
3687 | ws_debug("libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource(err), gcry_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3687, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3688 | return;
3689 | }
3690 |
3691 | if ((err = gcry_cipher_setiv(*hd1, iv1, 16))) {
3692 | gcry_cipher_close(*hd1);
3693 | ws_debug("ssh: can't set aes%d cipher iv", iKeyLen*8)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3693, __func__, "ssh: can't set aes%d cipher iv", iKeyLen*8 ); } } while (0);
3694 | ws_debug("libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource(err), gcry_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3694, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3695 | return;
3696 | }
3697 |
3698 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3699 |
3700 | } else if (CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id) {
3701 | int iKeyLen = CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id?16:CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id?24:32;
3702 | if (gcry_cipher_open(hd1, CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id?GCRY_CIPHER_AES128GCRY_CIPHER_AES:CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id?GCRY_CIPHER_AES192:GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_CTR, 0)) {
3703 | gcry_cipher_close(*hd1);
3704 | ws_debug("ssh: can't open aes%d cipher handle", iKeyLen*8)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3704, __func__, "ssh: can't open aes%d cipher handle", iKeyLen *8); } } while (0);
3705 | return;
3706 | }
3707 | uint8_t k1[32], iv1[16];
3708 | if(key->data){
3709 | memcpy(k1, key->data, iKeyLen);
3710 | }else{
3711 | memset(k1, 0, iKeyLen);
3712 | }
3713 | if(iv->data){
3714 | memcpy(iv1, iv->data, 16);
3715 | }else{
3716 | memset(iv1, 0, 16);
3717 | }
3718 |
3719 | ssh_debug_printf("ssh: cipher is aes%d-ctr\n", iKeyLen*8);
3720 | ssh_print_data("key", k1, iKeyLen);
3721 | ssh_print_data("iv", iv1, 16);
3722 |
3723 | if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3724 | gcry_cipher_close(*hd1);
3725 | ws_debug("ssh: can't set aes%d cipher key", iKeyLen*8)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3725, __func__, "ssh: can't set aes%d cipher key", iKeyLen* 8); } } while (0);
3726 | ws_debug("libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource(err), gcry_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3726, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3727 | return;
3728 | }
3729 |
3730 | if ((err = gcry_cipher_setctr(*hd1, iv1, 16))) {
3731 | gcry_cipher_close(*hd1);
3732 | ws_debug("ssh: can't set aes%d cipher iv", iKeyLen*8)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3732, __func__, "ssh: can't set aes%d cipher iv", iKeyLen*8 ); } } while (0);
3733 | ws_debug("libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource(err), gcry_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3733, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3734 | return;
3735 | }
3736 |
3737 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3738 |
3739 | } else if (CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
3740 | int iKeyLen = CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id?16:32;
3741 | if (gcry_cipher_open(hd1, CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id?GCRY_CIPHER_AES128GCRY_CIPHER_AES:GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_GCM, 0)) {
3742 | gcry_cipher_close(*hd1);
3743 | ws_debug("ssh: can't open aes%d cipher handle", iKeyLen*8)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3743, __func__, "ssh: can't open aes%d cipher handle", iKeyLen *8); } } while (0);
3744 | return;
3745 | }
3746 |
3747 | uint8_t k1[32], iv2[12];
3748 | if(key->data){
3749 | memcpy(k1, key->data, iKeyLen);
3750 | }else{
3751 | memset(k1, 0, iKeyLen);
3752 | }
3753 | if(iv->data){
3754 | memcpy(peer_data->iv, iv->data, 12);
3755 | }else{
3756 | memset(iv2, 0, 12);
3757 | }
3758 |
3759 | ssh_debug_printf("ssh: cipher is aes%d-gcm\n", iKeyLen*8);
3760 | ssh_print_data("key", k1, iKeyLen);
3761 | ssh_print_data("iv", peer_data->iv, 12);
3762 |
3763 | if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3764 | gcry_cipher_close(*hd1);
3765 | ws_debug("ssh: can't set aes%d cipher key", iKeyLen*8)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3765, __func__, "ssh: can't set aes%d cipher key", iKeyLen* 8); } } while (0);
3766 | ws_debug("libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource(err), gcry_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3766, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3767 | return;
3768 | }
3769 |
3770 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3771 |
3772 | } else {
3773 | ssh_debug_printf("ssh: cipher (%d) is unknown or not set\n", peer_data->cipher_id);
3774 | }
3775 | }
3776 |
3777 | static void
3778 | ssh_decryption_setup_mac(struct ssh_peer_data *peer_data,
3779 | ssh_bignum *iv)
3780 | {
3781 | if(peer_data->mac_id == CIPHER_MAC_SHA2_2560x00020001){
3782 | if(iv->data){
3783 | memcpy(peer_data->hmac_iv, iv->data, 32);
3784 | }else{
3785 | memset(peer_data->hmac_iv, 0, 32);
3786 | }
3787 | peer_data->hmac_iv_len = 32;
3788 | ssh_debug_printf("ssh: mac is hmac-sha2-256\n");
3789 | ssh_print_data("iv", peer_data->hmac_iv, peer_data->hmac_iv_len);
3790 | }else{
3791 | ws_debug("ssh: unsupported MAC")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3791, __func__, "ssh: unsupported MAC"); } } while (0);
3792 | }
3793 | }
3794 |
3795 | /* libgcrypt wrappers for HMAC/message digest operations {{{ */
3796 | /* hmac abstraction layer */
3797 | #define SSH_HMACgcry_md_hd_t gcry_md_hd_t
3798 |
3799 | static inline int
3800 | ssh_hmac_init(SSH_HMACgcry_md_hd_t* md, const void * key, int len, int algo)
3801 | {
3802 | gcry_error_t err;
3803 | const char *err_str, *err_src;
3804 |
3805 | err = gcry_md_open(md,algo, GCRY_MD_FLAG_HMAC);
3806 | if (err != 0) {
3807 | err_str = gcry_strerror(err);
3808 | err_src = gcry_strsource(err);
3809 | ssh_debug_printf("ssh_hmac_init(): gcry_md_open failed %s/%s", err_str, err_src);
3810 | return -1;
3811 | }
3812 | err = gcry_md_setkey(*(md), key, len);
3813 | if (err != 0) {
3814 | err_str = gcry_strerror(err);
3815 | err_src = gcry_strsource(err);
3816 | ssh_debug_printf("ssh_hmac_init(): gcry_md_setkey(..., ..., %d) failed %s/%s", len, err_str, err_src);
3817 | return -1;
3818 | }
3819 | return 0;
3820 | }
3821 |
3822 | static inline void
3823 | ssh_hmac_update(SSH_HMACgcry_md_hd_t* md, const void* data, int len)
3824 | {
3825 | gcry_md_write(*(md), data, len);
3826 | }
3827 |
3828 | static inline void
3829 | ssh_hmac_final(SSH_HMACgcry_md_hd_t* md, unsigned char* data, unsigned* datalen)
3830 | {
3831 | int algo;
3832 | unsigned len;
3833 |
3834 | algo = gcry_md_get_algo (*(md));
3835 | len = gcry_md_get_algo_dlen(algo);
3836 | DISSECTOR_ASSERT(len <= *datalen)((void) ((len <= *datalen) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c" , 3836, "len <= *datalen"))));
3837 | memcpy(data, gcry_md_read(*(md), algo), len);
3838 | *datalen = len;
3839 | }
3840 |
3841 | static inline void
3842 | ssh_hmac_cleanup(SSH_HMACgcry_md_hd_t* md)
3843 | {
3844 | gcry_md_close(*(md));
3845 | }
3846 | /* libgcrypt wrappers for HMAC/message digest operations }}} */
3847 |
3848 | /* Decryption integrity check {{{ */
3849 |
3850 | static int
3851 | ssh_get_digest_by_id(unsigned mac_id)
3852 | {
3853 | if(mac_id==CIPHER_MAC_SHA2_2560x00020001){
3854 | return GCRY_MD_SHA256;
3855 | }
3856 | return -1;
3857 | }
3858 |
3859 | static void
3860 | ssh_calc_mac(struct ssh_peer_data *peer_data, uint32_t seqnr, uint8_t* data, uint32_t datalen, uint8_t* calc_mac)
3861 | {
3862 | SSH_HMACgcry_md_hd_t hm;
3863 | int md;
3864 | uint32_t len;
3865 | uint8_t buf[DIGEST_MAX_SIZE48];
3866 |
3867 | md=ssh_get_digest_by_id(peer_data->mac_id);
3868 | // ssl_debug_printf("ssh_check_mac mac type:%s md %d\n",
3869 | // ssl_cipher_suite_dig(decoder->cipher_suite)->name, md);
3870 |
3871 | memset(calc_mac, 0, DIGEST_MAX_SIZE48);
3872 |
3873 | if (md == -1) {
3874 | return;
3875 | }
3876 | if (ssh_hmac_init(&hm, peer_data->hmac_iv, peer_data->hmac_iv_len, md) != 0)
3877 | return;
3878 |
3879 | /* hash sequence number */
3880 | phtonu32(buf, seqnr);
3881 |
3882 | ssh_print_data("Mac IV", peer_data->hmac_iv, peer_data->hmac_iv_len);
3883 | ssh_print_data("Mac seq", buf, 4);
3884 | ssh_print_data("Mac data", data, datalen);
3885 |
3886 | ssh_hmac_update(&hm,buf,4);
3887 |
3888 | ssh_hmac_update(&hm,data,datalen);
3889 |
3890 | /* get digest and digest len*/
3891 | len = sizeof(buf);
3892 | ssh_hmac_final(&hm,buf,&len);
3893 | ssh_hmac_cleanup(&hm);
3894 | ssh_print_data("Mac", buf, len);
3895 | memcpy(calc_mac, buf, len);
3896 |
3897 | return;
3898 | }
3899 | /* Decryption integrity check }}} */
3900 |
3901 | static ssh_packet_info_t *
3902 | ssh_get_packet_info(packet_info *pinfo, bool_Bool is_response)
3903 | {
3904 | ssh_packet_info_t *packet = (ssh_packet_info_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_ssh, 0);
3905 | if(!packet){
3906 | packet = wmem_new0(wmem_file_scope(), ssh_packet_info_t)((ssh_packet_info_t*)wmem_alloc0((wmem_file_scope()), sizeof( ssh_packet_info_t)));
3907 | packet->from_server = is_response;
3908 | packet->messages = NULL((void*)0);
3909 | p_add_proto_data(wmem_file_scope(), pinfo, proto_ssh, 0, packet);
3910 | }
3911 | return packet;
3912 | }
3913 |
3914 | static unsigned
3915 | ssh_decrypt_packet(tvbuff_t *tvb, packet_info *pinfo,
3916 | struct ssh_peer_data *peer_data, int offset)
3917 | {
3918 | bool_Bool is_response = ssh_peer_data_from_server(peer_data);
3919 |
3920 | gcry_error_t err;
3921 | unsigned message_length = 0, seqnr;
3922 | uint8_t *plain = NULL((void*)0);
3923 | const uint8_t *mac;
3924 | unsigned mac_len, data_len = 0;
3925 | uint8_t calc_mac[DIGEST_MAX_SIZE48];
3926 | memset(calc_mac, 0, DIGEST_MAX_SIZE48);
3927 | unsigned remaining = tvb_captured_length_remaining(tvb, offset);
3928 |
3929 | mac_len = peer_data->mac_length > 0 ? peer_data->mac_length : 0;
3930 | seqnr = peer_data->sequence_number;
3931 |
3932 | /* General algorithm:
3933 | * 1. If there are not enough bytes for the packet_length, and we can
3934 | * do reassembly, ask for one more segment.
3935 | * 2. Retrieve packet_length (encrypted in some modes).
3936 | * 3. Sanity check packet_length (the field is 4 bytes, but packet_length
3937 | * is unlikely to be much larger than 32768, which provides good indication
3938 | * a packet is continuation data or, in some modes, failed decryption.
3939 | * https://www.rfc-editor.org/rfc/rfc4253.html#section-6.1 )
3940 | * 4. If there are not enough bytes for packet_length, and we can do
3941 | * reassembly, tell the TCP dissector how many more bytes we need.
3942 | * 5. If the packet is truncated and we cannot reassemble, at this
3943 | * point we conclude that it is the next SSH packet, and advance the
3944 | * sequence number, invocation_counter, etc. before throwing an exception.
3945 | * 6. If we do have all the data, we decrypt and check the MAC before
3946 | * doing all that. (XXX - Advancing seqnr regardless could make sense
3947 | * in some ciphers.)
3948 | * 7. Possibly the MAC should be checked before decryption in some ciphers
3949 | * if we have all the data; possibly there should be a "do not check the
3950 | * MAC" preference a la TLS.
3951 | */
3952 |
3953 | if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3954 | if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
3955 | /* Can do reassembly, and the packet length is split across
3956 | * segment boundaries. */
3957 | pinfo->desegment_offset = offset;
3958 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
3959 | return tvb_captured_length(tvb);
3960 | }
3961 |
3962 | const uint8_t *ctext = tvb_get_ptr(tvb, offset, 4);
3963 | uint8_t plain_length_buf[4];
3964 |
3965 | if (!ssh_decrypt_chacha20(peer_data->cipher_2, seqnr, 0, ctext, 4,
3966 | plain_length_buf, 4)) {
3967 | ws_debug("ERROR: could not decrypt packet len")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3967, __func__, "ERROR: could not decrypt packet len"); } } while (0);
3968 | return tvb_captured_length(tvb);
3969 | }
3970 |
3971 | message_length = pntohu32(plain_length_buf);
3972 |
3973 | ssh_debug_printf("chachapoly_crypt seqnr=%d [%u]\n", seqnr, message_length);
3974 |
3975 | ssh_debug_printf("%s plain for seq = %d len = %u\n", is_response?"s2c":"c2s", seqnr, message_length);
3976 | if (message_length > SSH_MAX_PACKET_LEN32768) {
3977 | ws_debug("ssh: unreasonable message length %u", message_length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3977, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
3978 | return tvb_captured_length(tvb);
3979 | }
3980 | if (remaining < message_length + 4 + mac_len) {
3981 | // Need desegmentation; as "the chacha20-poly1305@openssh.com AEAD
3982 | // uses the sequence number as an initialisation vector (IV) to
3983 | // generate its per-packet MAC key and is otherwise stateless
3984 | // between packets," we need no special handling here.
3985 | // https://www.ietf.org/id/draft-miller-sshm-strict-kex-01.html
3986 | //
3987 | if (ssh_desegment && pinfo->can_desegment) {
3988 | pinfo->desegment_offset = offset;
3989 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
3990 | return tvb_captured_length(tvb);
3991 | }
3992 | // If we can't desegment, we will have an exception below in
3993 | // the tvb_get_ptr. Advance the sequence number so that the
3994 | // next SSH packet start will decrypt correctly.
3995 | peer_data->sequence_number++;
3996 | }
3997 |
3998 | plain = (uint8_t *)wmem_alloc0(pinfo->pool, message_length+4);
3999 | memcpy(plain, plain_length_buf, 4);
4000 | const uint8_t *ctext2 = tvb_get_ptr(tvb, offset+4, message_length);
4001 |
4002 | /* XXX - "Once the entire packet has been received, the MAC MUST be
4003 | * checked before decryption," but we decrypt first.
4004 | * https://datatracker.ietf.org/doc/html/draft-ietf-sshm-chacha20-poly1305-01
4005 | */
4006 | if (!ssh_decrypt_chacha20(peer_data->cipher, seqnr, 1, ctext2,
4007 | message_length, plain+4, message_length)) {
4008 | ws_debug("ERROR: could not decrypt packet payload")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4008, __func__, "ERROR: could not decrypt packet payload"); } } while (0);
4009 | return tvb_captured_length(tvb);
4010 | }
4011 |
4012 | mac = tvb_get_ptr(tvb, offset + 4 + message_length, mac_len);
4013 | uint8_t poly_key[32], iv[16];
4014 |
4015 | memset(poly_key, 0, 32);
4016 | memset(iv, 0, 8);
4017 | phtonu64(iv+8, (uint64_t)seqnr);
4018 | gcry_cipher_setiv(peer_data->cipher, iv, mac_len);
4019 | gcry_cipher_encrypt(peer_data->cipher, poly_key, 32, poly_key, 32);
4020 |
4021 | gcry_mac_hd_t mac_hd;
4022 | gcry_mac_open(&mac_hd, GCRY_MAC_POLY1305, 0, NULL((void*)0));
4023 | gcry_mac_setkey(mac_hd, poly_key, 32);
4024 | gcry_mac_write(mac_hd, ctext, 4);
4025 | gcry_mac_write(mac_hd, ctext2, message_length);
4026 | if (gcry_mac_verify(mac_hd, mac, mac_len)) {
4027 | ws_debug("ssh: MAC does not match")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4027, __func__, "ssh: MAC does not match"); } } while (0);
4028 | }
4029 | size_t buflen = DIGEST_MAX_SIZE48;
4030 | gcry_mac_read(mac_hd, calc_mac, &buflen);
4031 | gcry_mac_close(mac_hd);
4032 |
4033 | data_len = message_length + 4;
4034 |
4035 | ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
4036 | ssh_print_data("", plain, message_length+4);
4037 | } else if (CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
4038 |
4039 | /* AES GCM for Secure Shell [RFC 5647] */
4040 | /* The message length is Additional Authenticated Data */
4041 | if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
4042 | /* Can do reassembly, and the packet length is split across
4043 | * segment boundaries. */
4044 | pinfo->desegment_offset = offset;
4045 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4046 | return tvb_captured_length(tvb);
4047 | }
4048 | message_length = tvb_get_uint32(tvb, offset, ENC_BIG_ENDIAN0x00000000);
4049 | ssh_debug_printf("length: %d, remaining: %d\n", message_length, remaining);
4050 | /* The minimum size of a packet (not counting mac) is 16. */
4051 | if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 16) {
4052 | ws_debug("ssh: unreasonable message length %u", message_length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4052, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
4053 | return tvb_captured_length(tvb);
4054 | }
4055 |
4056 | /* SSH requires that the data to be encrypted (not including the AAD,
4057 | * so message_length) be a multiple of the block size, 16 octets */
4058 | if (message_length % 16 != 0) {
4059 | ssh_debug_printf("length not a multiple of block length (16)!\n");
4060 | }
4061 |
4062 | if (message_length + 4 + mac_len > remaining) {
4063 | // Need desegmentation; as the message length was unencrypted
4064 | // AAD, we need no special handling here.
4065 | if (pinfo->can_desegment) {
4066 | pinfo->desegment_offset = offset;
4067 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4068 | return tvb_captured_length(tvb);
4069 | }
4070 | // If we can't desegment, we will have an exception below in
4071 | // the tvb_get_ptr. Advance the sequence number (less crucial
4072 | // than with ChaCha20, as it's not an input.)
4073 | peer_data->sequence_number++;
4074 | }
4075 |
4076 | /* Set the IV and increment the invocation_counter for the next
4077 | * packet. Do this before retrieving the ciphertext with tvb_get_ptr
4078 | * in case this packet is truncated.
4079 | */
4080 | if ((err = gcry_cipher_setiv(peer_data->cipher, peer_data->iv, 12))) {
4081 | //gcry_cipher_close(peer_data->cipher);
4082 | //Don't close this unless we also remove the wmem callback
4083 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4084 | #ifndef _WIN32
4085 | ws_debug("ssh: can't set aes128 cipher iv")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4085, __func__, "ssh: can't set aes128 cipher iv"); } } while (0);
4086 | ws_debug("libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource(err), gcry_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4086, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
4087 | #endif //ndef _WIN32
4088 | return tvb_captured_length(tvb);
4089 | }
4090 | // Increment invocation_counter for next packet
4091 | int idx = 12;
4092 | do{
4093 | idx -= 1;
4094 | peer_data->iv[idx] += 1;
4095 | }while(idx>4 && peer_data->iv[idx]==0);
4096 |
4097 | const char *ctext = (const char *)tvb_get_ptr(tvb, offset + 4,
4098 | message_length);
4099 | plain = (uint8_t *)wmem_alloc(pinfo->pool, message_length+4);
4100 | phtonu32(plain, message_length);
4101 |
4102 | if ((err = gcry_cipher_authenticate(peer_data->cipher, plain, 4))) {
4103 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4104 | #ifndef _WIN32
4105 | ws_debug("can't authenticate using aes128-gcm: %s\n", gpg_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4105, __func__, "can't authenticate using aes128-gcm: %s\n" , gpg_strerror(err)); } } while (0);
4106 | #endif //ndef _WIN32
4107 | return tvb_captured_length(tvb);
4108 | }
4109 |
4110 | if ((err = gcry_cipher_decrypt(peer_data->cipher, plain+4, message_length,
4111 | ctext, message_length))) {
4112 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4113 | #ifndef _WIN32
4114 | ws_debug("can't decrypt aes-gcm %d %s %s", gcry_err_code(err), gcry_strsource(err), gcry_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4114, __func__, "can't decrypt aes-gcm %d %s %s", gcry_err_code (err), gcry_strsource(err), gcry_strerror(err)); } } while (0 );
4115 |
4116 | #endif //ndef _WIN32
4117 | return tvb_captured_length(tvb);
4118 | }
4119 |
4120 | if (gcry_cipher_gettag (peer_data->cipher, calc_mac, 16)) {
4121 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4122 | #ifndef _WIN32
4123 | ws_debug ("aes128-gcm, gcry_cipher_gettag() failed\n")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4123, __func__, "aes128-gcm, gcry_cipher_gettag() failed\n" ); } } while (0);
4124 | #endif //ndef _WIN32
4125 | return tvb_captured_length(tvb);
4126 | }
4127 |
4128 | if ((err = gcry_cipher_reset(peer_data->cipher)gcry_cipher_ctl ((peer_data->cipher), GCRYCTL_RESET, ((void *)0), 0))) {
4129 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4130 | #ifndef _WIN32
4131 | ws_debug("aes-gcm, gcry_cipher_reset failed: %s\n", gpg_strerror (err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4131, __func__, "aes-gcm, gcry_cipher_reset failed: %s\n", gpg_strerror (err)); } } while (0);
4132 | #endif //ndef _WIN32
4133 | return tvb_captured_length(tvb);
4134 | }
4135 |
4136 | data_len = message_length + 4;
4137 |
4138 | ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
4139 | ssh_print_data("", plain, message_length+4);
4140 |
4141 | } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id ||
4142 | CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id ||
4143 | CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id) {
4144 |
4145 | ws_noisy("Getting raw bytes of length %d", tvb_reported_length_remaining(tvb, offset))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 4145, __func__, "Getting raw bytes of length %d", tvb_reported_length_remaining (tvb, offset)); } } while (0);
4146 | /* In CBC and CTR mode, the message length is encrypted as well.
4147 | * We need to decrypt one block, 16 octets, to get the length.
4148 | */
4149 | if (ssh_desegment && pinfo->can_desegment && remaining < 16) {
4150 | /* Can do reassembly, and the packet length is split across
4151 | * segment boundaries. */
4152 | pinfo->desegment_offset = offset;
4153 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4154 | return tvb_captured_length(tvb);
4155 | }
4156 | /* Do we already have the first block decrypted from when the packet
4157 | * was too large and segmented?
4158 | */
4159 | if (!peer_data->plain0_valid) {
4160 | const char *cypher_buf0 = (const char *)tvb_get_ptr(tvb, offset, 16);
4161 |
4162 | if (gcry_cipher_decrypt(peer_data->cipher, peer_data->plain0, 16, cypher_buf0, 16))
4163 | {
4164 | ws_debug("can\'t decrypt aes128")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4164, __func__, "can\'t decrypt aes128"); } } while (0);
4165 | return tvb_captured_length(tvb);
4166 | }
4167 | }
4168 |
4169 | message_length = pntohu32(peer_data->plain0);
4170 |
4171 | /* The message_length value doesn't include the length of the
4172 | * message_length field itself, so it must be at least 12 bytes.
4173 | */
4174 | if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 12){
4175 | ws_debug("ssh: unreasonable message length %u", message_length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4175, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
4176 | return tvb_captured_length(tvb);
4177 | }
4178 |
4179 | /* SSH requires that the data to be encrypted (message_length+4)
4180 | * be a multiple of the block size, 16 octets. */
4181 | if (message_length % 16 != 12) {
4182 | ssh_debug_printf("total length not a multiple of block length (16)!\n");
4183 | }
4184 | if (remaining < message_length + 4 + mac_len) {
4185 | /* Need desegmentation
4186 | *
4187 | * We will be handed the full encrypted packet again. We can either
4188 | * store the decrypted first block, or will need to reset the CTR
4189 | * or IV appropriately before decrypting the first block again.
4190 | * libgcrypt does not provide an easy way to get the current value
4191 | * of the CTR or (or IV/last block for CBC), so we just store the
4192 | * decrypted first block.
4193 | */
4194 | if (ssh_desegment && pinfo->can_desegment) {
4195 | ws_noisy(" need_desegmentation: offset = %d, reported_length_remaining = %d\n",do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 4196, __func__, " need_desegmentation: offset = %d, reported_length_remaining = %d\n" , offset, tvb_reported_length_remaining(tvb, offset)); } } while (0)
4196 | offset, tvb_reported_length_remaining(tvb, offset))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 4196, __func__, " need_desegmentation: offset = %d, reported_length_remaining = %d\n" , offset, tvb_reported_length_remaining(tvb, offset)); } } while (0);
4197 | peer_data->plain0_valid = true1;
4198 | pinfo->desegment_offset = offset;
4199 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4200 | return tvb_captured_length(tvb);
4201 | } else {
4202 | // If we can't desegment, we will have an exception below in
4203 | // the tvb_get_ptr. Advance the sequence number so that the
4204 | // the hash will work for the next packet.
4205 | //
4206 | // XXX - In CTR mode, we should advance the CTR based on the
4207 | // known length so we can dissect the next block. We would
4208 | // also need to reset the CTR after failing to dissect a
4209 | // packet_length on the continuation data that comes next.
4210 | peer_data->sequence_number++;
4211 | }
4212 | }
4213 | peer_data->plain0_valid = false0;
4214 | plain = (uint8_t *)wmem_alloc(pinfo->pool, message_length+4);
4215 | memcpy(plain, peer_data->plain0, 16);
4216 |
4217 | if (message_length > 12) {
4218 | /* All of these functions actually do handle the case where
4219 | * there is no data left, so the check is unnecessary.
4220 | */
4221 | char *ct = (char *)tvb_get_ptr(tvb, offset + 16, message_length - 12);
4222 | if ((err = gcry_cipher_decrypt(peer_data->cipher, plain + 16, message_length - 12, ct, message_length - 12)))
4223 | {
4224 | ws_debug("can't decrypt aes-cbc/ctr %d %s %s", gcry_err_code(err), gcry_strsource(err), gcry_strerror(err))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4224, __func__, "can't decrypt aes-cbc/ctr %d %s %s", gcry_err_code (err), gcry_strsource(err), gcry_strerror(err)); } } while (0 );
4225 | return tvb_captured_length(tvb);
4226 | }
4227 | }
4228 |
4229 | ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
4230 | ssh_print_data("", plain, message_length+4);
4231 |
4232 | data_len = message_length + 4;
4233 |
4234 | // XXX - In -etm modes, should calculate MAC based on ciphertext.
4235 | ssh_calc_mac(peer_data, seqnr, plain, data_len, calc_mac);
4236 | } else if (CIPHER_NULL0x00080000 == peer_data->cipher_id) {
4237 | if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
4238 | /* Can do reassembly, and the packet length is split across
4239 | * segment boundaries. */
4240 | pinfo->desegment_offset = offset;
4241 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4242 | return tvb_captured_length(tvb);
4243 | }
4244 | message_length = tvb_get_uint32(tvb, offset, ENC_BIG_ENDIAN0x00000000);
4245 | ssh_debug_printf("length: %d, remaining: %d\n", message_length, remaining);
4246 | if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 8) {
4247 | ws_debug("ssh: unreasonable message length %u", message_length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4247, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
4248 | return tvb_captured_length(tvb);
4249 | }
4250 |
4251 | if (message_length + 4 + mac_len > remaining) {
4252 | // Need desegmentation; as the message length was unencrypted
4253 | // AAD, we need no special handling here.
4254 | if (pinfo->can_desegment) {
4255 | pinfo->desegment_offset = offset;
4256 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4257 | return tvb_captured_length(tvb);
4258 | }
4259 | // If we can't desegment, we will have an exception below in
4260 | // the tvb_memdup. Advance the sequence number (not crucial).
4261 | peer_data->sequence_number++;
4262 | }
4263 | data_len = message_length + 4;
4264 | plain = tvb_memdup(pinfo->pool, tvb, offset, data_len);
4265 |
4266 | // XXX - In -etm modes, should calculate MAC based on ciphertext.
4267 | ssh_calc_mac(peer_data, seqnr, plain, data_len, calc_mac);
4268 | }
4269 |
4270 | if (mac_len && data_len) {
4271 | if (mac_len <= DIGEST_MAX_SIZE48 && !memcmp(tvb_get_ptr(tvb, offset + data_len, mac_len), calc_mac, mac_len)){
4272 | ws_noisy("MAC OK")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 4272, __func__, "MAC OK"); } } while (0);
4273 | }else{
4274 | ws_debug("MAC ERR")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4274, __func__, "MAC ERR"); } } while (0);
4275 | /* Bad MAC, just show the packet as encrypted. We can get
4276 | * this for a known encryption type with no keys currently. */
4277 | if (!ssh_ignore_mac_failed) {
4278 | return tvb_captured_length(tvb);
4279 | }
4280 | }
4281 | }
4282 |
4283 | if(plain){
4284 | // Save message
4285 |
4286 | ssh_packet_info_t *packet = ssh_get_packet_info(pinfo, is_response);
4287 |
4288 | int record_id = tvb_raw_offset(tvb)+offset;
4289 | ssh_message_info_t *message;
4290 |
4291 | message = wmem_new(wmem_file_scope(), ssh_message_info_t)((ssh_message_info_t*)wmem_alloc((wmem_file_scope()), sizeof( ssh_message_info_t)));
4292 | message->sequence_number = peer_data->sequence_number++;
4293 | message->plain_data = wmem_memdup(wmem_file_scope(), plain, data_len);
4294 | message->data_len = data_len;
4295 | message->id = record_id;
4296 | message->next = NULL((void*)0);
4297 | memcpy(message->calc_mac, calc_mac, DIGEST_MAX_SIZE48);
4298 | ssh_debug_printf("%s->sequence_number++ > %d\n", is_response?"server":"client", peer_data->sequence_number);
4299 |
4300 | ssh_message_info_t **pmessage = &packet->messages;
4301 | while(*pmessage){
4302 | pmessage = &(*pmessage)->next;
4303 | }
4304 | *pmessage = message;
4305 | }
4306 |
4307 | offset += message_length + mac_len + 4;
4308 | return offset;
4309 | }
4310 |
4311 | static bool_Bool
4312 | ssh_decrypt_chacha20(gcry_cipher_hd_t hd,
4313 | uint32_t seqnr, uint32_t counter, const unsigned char *ctext, unsigned ctext_len,
4314 | unsigned char *plain, unsigned plain_len)
4315 | {
4316 | unsigned char seq[8];
4317 | unsigned char iv[16];
4318 |
4319 | phtonu64(seq, (uint64_t)seqnr);
4320 |
4321 | // chacha20 uses a different cipher handle for the packet payload & length
4322 | // the payload uses a block counter
4323 | if (counter) {
4324 | unsigned char ctr[8] = {1,0,0,0,0,0,0,0};
4325 | memcpy(iv, ctr, 8);
4326 | memcpy(iv+8, seq, 8);
4327 | }
4328 |
4329 | return ((!counter && gcry_cipher_setiv(hd, seq, 8) == 0) ||
4330 | (counter && gcry_cipher_setiv(hd, iv, 16) == 0)) &&
4331 | gcry_cipher_decrypt(hd, plain, plain_len, ctext, ctext_len) == 0;
4332 | }
4333 |
4334 | static int
4335 | ssh_dissect_decrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
4336 | struct ssh_peer_data *peer_data, proto_tree *tree,
4337 | ssh_message_info_t *message)
4338 | {
4339 | int offset = 0; // TODO:
4340 | int dissected_len = 0;
4341 | tvbuff_t* payload_tvb;
4342 |
4343 | const uint8_t* plaintext = message->plain_data;
4344 | unsigned plaintext_len = message->data_len;
4345 |
4346 | col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Encrypted packet (plaintext_len=%d)", plaintext_len);
4347 |
4348 | tvbuff_t *packet_tvb = tvb_new_child_real_data(tvb, plaintext, plaintext_len, plaintext_len);
4349 | add_new_data_source(pinfo, packet_tvb, "Decrypted Packet");
4350 |
4351 | unsigned plen;
4352 | uint32_t padding_length;
4353 | unsigned remain_length;
4354 | unsigned msg_code;
4355 |
4356 | proto_item *ti, *padding_ti;
4357 | proto_item *msg_type_tree = NULL((void*)0);
4358 |
4359 | /*
4360 | * We use "tvb_ensure_captured_length_remaining()" to make sure there
4361 | * actually *is* data remaining.
4362 | *
4363 | * This means we're guaranteed that "remain_length" is positive.
4364 | */
4365 | remain_length = tvb_ensure_captured_length_remaining(packet_tvb, offset);
4366 | /*
4367 | * Can we do reassembly?
4368 | */
4369 | if (ssh_desegment && pinfo->can_desegment) {
4370 | /*
4371 | * Yes - would an SSH header starting at this offset
4372 | * be split across segment boundaries?
4373 | */
4374 | if (remain_length < 4) {
4375 | /*
4376 | * Yes. Tell the TCP dissector where the data for
4377 | * this message starts in the data it handed us and
4378 | * that we need "some more data." Don't tell it
4379 | * exactly how many bytes we need because if/when we
4380 | * ask for even more (after the header) that will
4381 | * break reassembly.
4382 | */
4383 | pinfo->desegment_offset = offset;
4384 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4385 | return offset;
4386 | }
4387 | }
4388 | /* XXX - Defragmentation needs to be done in ssh_decrypt_packet, and the
4389 | * checks there should mean that the above never has an effect. (It's
4390 | * copied from ssh_dissect_key_exchange.)
4391 | */
4392 | plen = tvb_get_ntohl(packet_tvb, offset);
4393 |
4394 | if (ssh_desegment && pinfo->can_desegment) {
4395 | if (plen + 4 > remain_length) {
4396 | pinfo->desegment_offset = offset;
4397 | pinfo->desegment_len = plen+4 - remain_length;
4398 | return offset;
4399 | }
4400 | }
4401 | /*
4402 | * Need to check plen > 0x80000000 here
4403 | */
4404 |
4405 | ti = proto_tree_add_uint(tree, hf_ssh_packet_length, packet_tvb,
4406 | offset, 4, plen);
4407 | if (plen < 8) {
4408 | /* RFC 4253 6: "[T]he length of the concatenation of 'packet_length',
4409 | * 'padding_length', 'payload', and 'random padding' MUST be a multiple
4410 | * of the cipher block size or 8, whichever is larger,... even when
4411 | * using stream ciphers."
4412 | *
4413 | * Modes that do not encrypt plen with the same key as the other three
4414 | * cannot follow this as written and delete 'packet_length' from the
4415 | * above sentence. As padding_length is one byte and random_padding at
4416 | * least four, packet_length must be at least 8 in all modes.
4417 | */
4418 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Packet length is %d, MUST be at least 8", plen);
4419 | } else if (plen >= SSH_MAX_PACKET_LEN32768) {
4420 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Overly large number %d", plen);
4421 | plen = remain_length-4;
4422 | }
4423 | offset+=4;
4424 |
4425 | /* padding length */
4426 | padding_ti = proto_tree_add_item_ret_uint(tree, hf_ssh_padding_length, packet_tvb, offset, 1, ENC_NA0x00000000, &padding_length);
4427 | /* RFC 4253 6: "There MUST be at least four bytes of padding." */
4428 | if (padding_length < 4) {
4429 | expert_add_info_format(pinfo, padding_ti, &ei_ssh_padding_length, "Padding length is %d, MUST be at least 4", padding_length);
4430 | }
4431 | unsigned payload_length;
4432 | if (ckd_sub(&payload_length, plen, padding_length + 1)__builtin_sub_overflow((plen), (padding_length + 1), (&payload_length ))) {
4433 | expert_add_info_format(pinfo, padding_ti, &ei_ssh_padding_length, "Padding length is too large [%d], implies a negative payload length", padding_length);
4434 | payload_length = 0;
4435 | }
4436 | offset += 1;
4437 |
4438 | /* msg_code */
4439 | msg_code = tvb_get_uint8(packet_tvb, offset);
4440 | /* XXX - Payload compression could have been negotiated */
4441 | payload_tvb = tvb_new_subset_length(packet_tvb, offset, (int)payload_length);
4442 | bool_Bool is_response = ssh_peer_data_from_server(peer_data);
4443 |
4444 | /* Transport layer protocol */
4445 | /* Generic (1-19) */
4446 | if(msg_code >= 1 && msg_code <= 19) {
4447 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4448 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Transport (generic)");
4449 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4450 | dissected_len = ssh_dissect_transport_generic(payload_tvb, pinfo, 1, peer_data, msg_type_tree, msg_code);
4451 | }
4452 | /* Algorithm negotiation (20-29) */
4453 | /* Normally these messages are all dissected in ssh_dissect_key_exchange */
4454 | else if(msg_code >=20 && msg_code <= 29) {
4455 | //TODO: See if the complete dissector should be refactored to always go through here first offset = ssh_dissect_transport_algorithm_negotiation(packet_tvb, pinfo, global_data, offset, msg_type_tree, is_response, msg_code);
4456 |
4457 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4458 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Transport (algorithm negotiation)");
4459 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4460 | dissected_len = 1;
4461 |
4462 | ws_debug("SSH dissect: pass %u, frame %u, msg_code %u, do_decrypt=%d", pinfo->fd->visited, pinfo->fd->num, msg_code, peer_data->global_data->do_decrypt)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4462, __func__, "SSH dissect: pass %u, frame %u, msg_code %u, do_decrypt=%d" , pinfo->fd->visited, pinfo->fd->num, msg_code, peer_data ->global_data->do_decrypt); } } while (0);
4463 | switch(msg_code)
4464 | {
4465 | case SSH_MSG_KEXINIT20:
4466 | {
4467 | ws_debug("ssh: REKEY msg_code 20: storing frame %u number, offset %d" , pinfo->num, offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4467, __func__, "ssh: REKEY msg_code 20: storing frame %u number, offset %d" , pinfo->num, offset); } } while (0);
4468 | peer_data->rekey_trigger_frame = pinfo->num;
4469 | // Reset array while REKEY: sanitize server_key_exchange_init and force do_decrypt :
4470 | peer_data->global_data->kex_server_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
4471 | peer_data->global_data->do_decrypt = true1;
4472 | dissected_len = ssh_dissect_key_init(payload_tvb, pinfo, offset - 4, msg_type_tree, is_response, peer_data->global_data);
4473 | break;
4474 | }
4475 | case SSH_MSG_NEWKEYS21:
4476 | {
4477 | if (peer_data->rekey_pending) {
4478 | ws_debug("ssh: REKEY pending... NEWKEYS frame %u", pinfo->num)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4478, __func__, "ssh: REKEY pending... NEWKEYS frame %u", pinfo ->num); } } while (0);
4479 | ws_debug("ssh: decrypting frame %u with key ID %u, seq=%u", pinfo->num, peer_data->cipher_id, peer_data->sequence_number)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4479, __func__, "ssh: decrypting frame %u with key ID %u, seq=%u" , pinfo->num, peer_data->cipher_id, peer_data->sequence_number ); } } while (0);
4480 | if (peer_data->global_data->ext_kex_strict) {
4481 | peer_data->sequence_number = 0;
4482 | ssh_debug_printf("%s->sequence_number reset to 0 (Strict KEX)\n", is_response ? "server" : "client");
4483 | ws_debug("ssh: REKEY reset %s sequence number to 0 at frame %u (Strict KEX)", is_response ? "server" : "client", pinfo->num)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4483, __func__, "ssh: REKEY reset %s sequence number to 0 at frame %u (Strict KEX)" , is_response ? "server" : "client", pinfo->num); } } while (0);
4484 | }
4485 | // finalize the rekey (activate the new keys)
4486 | if (!is_response) { // Only process client-sent NEWKEYS
4487 | // Activate new key material into peer_data->cipher
4488 | ssh_debug_printf("Activating new keys for CLIENT => SERVER\n");
4489 | ssh_decryption_setup_cipher(peer_data, &peer_data->global_data->new_keys[0], &peer_data->global_data->new_keys[2]);
4490 | ssh_decryption_setup_mac(peer_data, &peer_data->global_data->new_keys[4]);
4491 | } else { // Only process server-sent NEWKEYS
4492 | // Activate new key material into peer_data->cipher
4493 | ssh_debug_printf("Activating new keys for SERVER => CLIENT\n");
4494 | ssh_decryption_setup_cipher(peer_data, &peer_data->global_data->new_keys[1], &peer_data->global_data->new_keys[3]);
4495 | ssh_decryption_setup_mac(peer_data, &peer_data->global_data->new_keys[5]);
4496 | }
4497 | // Finishing REKEY
4498 | peer_data->rekey_pending = false0;
4499 | ws_debug("ssh: REKEY done... switched to NEWKEYS at frame %u", pinfo->num)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4499, __func__, "ssh: REKEY done... switched to NEWKEYS at frame %u" , pinfo->num); } } while (0);
4500 | }
4501 | break;
4502 | }
4503 | }
4504 | }
4505 | /* Key exchange method specific (reusable) (30-49) */
4506 | /* Normally these messages are all dissected in ssh_dissect_key_exchange */
4507 | else if (msg_code >=30 && msg_code <= 49) {
4508 | //TODO: See if the complete dissector should be refactored to always go through here first offset = global_data->kex_specific_dissector(msg_code, packet_tvb, pinfo, offset, msg_type_tree);
4509 |
4510 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Transport (key exchange method specific)");
4511 | ws_debug("ssh: rekey KEX_xxx_INIT/KEX_xxx_REPLY detected in frame %u", pinfo->num)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4511, __func__, "ssh: rekey KEX_xxx_INIT/KEX_xxx_REPLY detected in frame %u" , pinfo->num); } } while (0);
4512 | peer_data->rekey_pending = true1;
4513 | dissected_len = peer_data->global_data->kex_specific_dissector(msg_code, payload_tvb, pinfo, offset -5, msg_type_tree, peer_data->global_data);
4514 | }
4515 |
4516 | /* User authentication protocol */
4517 | /* Generic (50-59) */
4518 | else if (msg_code >= 50 && msg_code <= 59) {
4519 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4520 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: User Authentication (generic)");
4521 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4522 | dissected_len = ssh_dissect_userauth_generic(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4523 | }
4524 | /* User authentication method specific (reusable) (60-79) */
4525 | else if (msg_code >= 60 && msg_code <= 79) {
4526 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4527 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: User Authentication: (method specific)");
4528 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4529 | dissected_len = ssh_dissect_userauth_specific(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4530 | }
4531 |
4532 | /* Connection protocol */
4533 | /* Generic (80-89) */
4534 | else if (msg_code >= 80 && msg_code <= 89) {
4535 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4536 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Connection (generic)");
4537 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4538 | dissected_len = ssh_dissect_connection_generic(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4539 | }
4540 | /* Channel related messages (90-127) */
4541 | else if (msg_code >= 90 && msg_code <= 127) {
4542 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4543 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Connection: (channel related message)");
4544 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4545 | dissected_len = ssh_dissect_connection_specific(payload_tvb, pinfo, peer_data, 1, msg_type_tree, msg_code, message);
4546 | }
4547 |
4548 | /* Reserved for client protocols (128-191) */
4549 | else if (msg_code >= 128 && msg_code <= 191) {
4550 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4551 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Client protocol");
4552 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4553 | offset+=1;
4554 | // TODO: dissected_len = ssh_dissect_client(payload_tvb, pinfo, global_data, 1, msg_type_tree, is_response, msg_code);
4555 | }
4556 |
4557 | /* Local extensions (192-255) */
4558 | else if (msg_code >= 192 && msg_code <= 255) {
4559 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Local extension");
4560 | dissected_len = ssh_dissect_local_extension(payload_tvb, pinfo, 0, peer_data, msg_type_tree, msg_code);
4561 | }
4562 |
4563 | /* XXX - ssh_dissect_key_exchange only adds undecoded payload here,
4564 | * i.e., tvb_reported_length_remaining(payload_tvb, dissected_len)
4565 | */
4566 | if (payload_length > 0) {
4567 | proto_tree_add_item(msg_type_tree, hf_ssh_payload, packet_tvb, offset, payload_length, ENC_NA0x00000000);
4568 | }
4569 | if(dissected_len!=(int)payload_length){
4570 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but payload length is %d bytes [%d]", dissected_len, payload_length, msg_code);
4571 | }
4572 | offset += payload_length;
4573 |
4574 | /* padding */
4575 | proto_tree_add_item(tree, hf_ssh_padding_string, packet_tvb, offset, padding_length, ENC_NA0x00000000);
4576 | offset += padding_length;
4577 |
4578 | if (peer_data->mac_length > 0) {
4579 | proto_tree_add_checksum_bytes(tree, tvb, offset, hf_ssh_mac_string, hf_ssh_mac_status, &ei_ssh_mac_bad, pinfo, message->calc_mac, peer_data->mac_length, PROTO_CHECKSUM_VERIFY0x01);
4580 | offset += peer_data->mac_length;
4581 | }
4582 | ti = proto_tree_add_uint(tree, hf_ssh_seq_num, tvb, offset, 0, message->sequence_number);
4583 | proto_item_set_generated(ti);
4584 | return offset;
4585 | }
4586 |
4587 | static int
4588 | ssh_dissect_transport_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
4589 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code)
4590 | {
4591 | (void)pinfo;
4592 | if(msg_code==SSH_MSG_DISCONNECT1){
4593 | proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_reason, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4594 | offset += 4;
4595 | unsigned nlen;
4596 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4597 | proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_description_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4598 | offset += 4;
4599 | proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_description, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4600 | offset += nlen;
4601 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4602 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4603 | offset += 4;
4604 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4605 | offset += nlen;
4606 | }else if(msg_code==SSH_MSG_IGNORE2){
4607 | offset += ssh_tree_add_string(packet_tvb, offset, msg_type_tree, hf_ssh_ignore_data, hf_ssh_ignore_data_length);
4608 | }else if(msg_code==SSH_MSG_DEBUG4){
4609 | unsigned slen;
4610 | proto_tree_add_item(msg_type_tree, hf_ssh_debug_always_display, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4611 | offset += 1;
4612 | slen = tvb_get_ntohl(packet_tvb, offset) ;
4613 | proto_tree_add_item(msg_type_tree, hf_ssh_debug_message_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4614 | offset += 4;
4615 | proto_tree_add_item(msg_type_tree, hf_ssh_debug_message, packet_tvb, offset, slen, ENC_UTF_80x00000002);
4616 | offset += slen;
4617 | slen = tvb_get_ntohl(packet_tvb, offset) ;
4618 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4619 | offset += 4;
4620 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4621 | offset += slen;
4622 | }else if(msg_code==SSH_MSG_SERVICE_REQUEST5){
4623 | unsigned nlen;
4624 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4625 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4626 | offset += 4;
4627 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4628 | offset += nlen;
4629 | }else if(msg_code==SSH_MSG_SERVICE_ACCEPT6){
4630 | unsigned nlen;
4631 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4632 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4633 | offset += 4;
4634 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4635 | offset += nlen;
4636 | }else if(msg_code==SSH_MSG_EXT_INFO7){
4637 | unsigned ext_cnt;
4638 | ext_cnt = tvb_get_ntohl(packet_tvb, offset);
4639 | proto_tree_add_item(msg_type_tree, hf_ssh_ext_count, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4640 | offset += 4;
4641 | for(unsigned ext_index = 0; ext_index < ext_cnt; ext_index++) {
4642 | offset = ssh_dissect_rfc8308_extension(packet_tvb, pinfo, offset, peer_data, msg_type_tree);
4643 | }
4644 | }
4645 | return offset;
4646 | }
4647 |
4648 | static int
4649 | ssh_dissect_rfc8308_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
4650 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree)
4651 | {
4652 | (void)pinfo;
4653 | unsigned ext_name_slen = tvb_get_ntohl(packet_tvb, offset);
4654 | uint8_t *ext_name = tvb_get_string_enc(pinfo->pool, packet_tvb, offset + 4, ext_name_slen, ENC_ASCII0x00000000);
4655 | unsigned ext_value_slen = tvb_get_ntohl(packet_tvb, offset + 4 + ext_name_slen);
4656 | unsigned ext_len = 8 + ext_name_slen + ext_value_slen;
4657 | proto_item *ext_tree = proto_tree_add_subtree_format(msg_type_tree, packet_tvb, offset, ext_len, ett_extension, NULL((void*)0), "Extension: %s", ext_name);
4658 |
4659 | proto_tree_add_item(ext_tree, hf_ssh_ext_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4660 | offset += 4;
4661 | proto_tree_add_item(ext_tree, hf_ssh_ext_name, packet_tvb, offset, ext_name_slen, ENC_ASCII0x00000000);
4662 | offset += ext_name_slen;
4663 | proto_tree_add_item(ext_tree, hf_ssh_ext_value_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4664 | offset += 4;
4665 | proto_tree_add_item(ext_tree, hf_ssh_ext_value, packet_tvb, offset, ext_value_slen, ENC_NA0x00000000);
4666 |
4667 | if (g_str_equal(ext_name, "server-sig-algs")(strcmp ((const char *) (ext_name), (const char *) ("server-sig-algs" )) == 0)) {
4668 | // server-sig-algs (RFC8308 Sec. 3.1)
4669 | proto_tree_add_item(ext_tree, hf_ssh_ext_server_sig_algs_algorithms, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4670 | offset += ext_value_slen;
4671 | } else if (g_str_equal(ext_name, "delay-compression")(strcmp ((const char *) (ext_name), (const char *) ("delay-compression" )) == 0)) {
4672 | // delay-compression (RFC8308 Sec 3.2)
4673 | unsigned slen;
4674 | slen = tvb_get_ntohl(packet_tvb, offset);
4675 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_client_to_server_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4676 | offset += 4;
4677 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_client_to_server, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4678 | offset += slen;
4679 | slen = tvb_get_ntohl(packet_tvb, offset);
4680 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_server_to_client_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4681 | offset += 4;
4682 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_server_to_client, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4683 | offset += slen;
4684 | } else if (g_str_equal(ext_name, "no-flow-control")(strcmp ((const char *) (ext_name), (const char *) ("no-flow-control" )) == 0)) {
4685 | // no-flow-control (RFC 8308 Sec 3.3)
4686 | proto_tree_add_item(ext_tree, hf_ssh_ext_no_flow_control_value, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4687 | offset += ext_value_slen;
4688 | } else if (g_str_equal(ext_name, "elevation")(strcmp ((const char *) (ext_name), (const char *) ("elevation" )) == 0)) {
4689 | // elevation (RFC 8308 Sec 3.4)
4690 | proto_tree_add_item(ext_tree, hf_ssh_ext_elevation_value, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4691 | offset += ext_value_slen;
4692 | } else if (g_str_equal(ext_name, "publickey-algorithms@roumenpetrov.info")(strcmp ((const char *) (ext_name), (const char *) ("publickey-algorithms@roumenpetrov.info" )) == 0)) {
4693 | // publickey-algorithms@roumenpetrov.info (proprietary)
4694 | proto_tree_add_item(ext_tree, hf_ssh_ext_prop_publickey_algorithms_algorithms, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4695 | offset += ext_value_slen;
4696 | } else if (g_str_equal(ext_name, "ping@openssh.com")(strcmp ((const char *) (ext_name), (const char *) ("ping@openssh.com" )) == 0)) {
4697 | // ping@openssh.com (proprietary w/ primitive extension value)
4698 | peer_data->global_data->ext_ping_openssh_offered = true1;
4699 | offset += ext_value_slen;
4700 | } else {
4701 | offset += ext_value_slen;
4702 | }
4703 |
4704 | // The following extensions do not require advanced dissection:
4705 | // - global-requests-ok
4706 | // - ext-auth-info
4707 | // - publickey-hostbound@openssh.com
4708 | // - ext-info-in-auth@openssh.com
4709 |
4710 | return offset;
4711 | }
4712 |
4713 | static int
4714 | ssh_dissect_userauth_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
4715 | int offset, proto_item *msg_type_tree, unsigned msg_code)
4716 | {
4717 | if(msg_code==SSH_MSG_USERAUTH_REQUEST50){
4718 | uint32_t slen;
4719 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_user_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4720 | offset += 4;
4721 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_user_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4722 | offset += slen;
4723 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4724 | offset += 4;
4725 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_service_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4726 | offset += slen;
4727 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_method_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4728 | offset += 4;
4729 | const char* key_type;
4730 | proto_tree_add_item_ret_string(msg_type_tree, hf_ssh_userauth_method_name, packet_tvb, offset, slen, ENC_ASCII0x00000000, pinfo->pool, (const uint8_t**)&key_type);
4731 | offset += slen;
4732 | if (0 == strcmp(key_type, "none")) {
4733 | }else if (0 == strcmp(key_type, "publickey") || 0 == strcmp(key_type, "publickey-hostbound-v00@openssh.com")) {
4734 | uint8_t bHaveSignature = tvb_get_uint8(packet_tvb, offset);
4735 | int dissected_len = 0;
4736 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_have_signature, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4737 | offset += 1;
4738 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_pka_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4739 | offset += 4;
4740 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4741 | offset += slen;
4742 | proto_item *ti;
4743 | ti = proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_blob_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4744 | offset += 4;
4745 | dissected_len = ssh_dissect_public_key_blob(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
4746 | if(dissected_len!=(int)slen){
4747 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4748 | }
4749 | offset += slen;
4750 | if (0 == strcmp(key_type, "publickey-hostbound-v00@openssh.com")) {
4751 | // Host key - but should we add it to global data or not?
4752 | offset += ssh_tree_add_hostkey(packet_tvb, pinfo, offset, msg_type_tree, "Server host key",
4753 | ett_key_exchange_host_key, NULL((void*)0));
4754 | }
4755 | if(bHaveSignature){
4756 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_signature_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4757 | offset += 4;
4758 | proto_item *signature_tree = NULL((void*)0);
4759 | signature_tree = proto_tree_add_subtree(msg_type_tree, packet_tvb, offset, slen, ett_userauth_pk_signature, NULL((void*)0), "Public key signature");
4760 | dissected_len = ssh_dissect_public_key_signature(packet_tvb, pinfo, offset, signature_tree) - offset;
4761 | if(dissected_len!=(int)slen){
4762 | expert_add_info_format(pinfo, signature_tree, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4763 | }
4764 | offset += slen;
4765 | }
4766 | }else if (0 == strcmp(key_type, "password")) {
4767 | uint8_t bChangePassword = tvb_get_uint8(packet_tvb, offset);
4768 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_change_password, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4769 | offset += 1;
4770 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_password_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4771 | offset += 4;
4772 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_password, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4773 | offset += slen;
4774 | if(bChangePassword){
4775 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_new_password_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4776 | offset += 4;
4777 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_new_password, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4778 | offset += slen;
4779 | }
4780 | }else{
4781 | }
4782 |
4783 | }else if(msg_code==SSH_MSG_USERAUTH_FAILURE51){
4784 | unsigned slen;
4785 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_auth_failure_list_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4786 | offset += 4;
4787 | proto_tree_add_item(msg_type_tree, hf_ssh_auth_failure_list, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4788 | offset += slen;
4789 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_partial_success, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4790 | offset += 1;
4791 | }
4792 | return offset;
4793 | }
4794 |
4795 | static int
4796 | ssh_dissect_userauth_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
4797 | int offset, proto_item *msg_type_tree, unsigned msg_code)
4798 | {
4799 | if(msg_code==SSH_MSG_USERAUTH_PK_OK60){
4800 | proto_item *ti;
4801 | int dissected_len = 0;
4802 | unsigned slen;
4803 | slen = tvb_get_ntohl(packet_tvb, offset) ;
4804 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4805 | offset += 4;
4806 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4807 | offset += slen;
4808 | ti = proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_blob_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4809 | offset += 4;
4810 | dissected_len = ssh_dissect_public_key_blob(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
4811 | if(dissected_len!=(int)slen){
4812 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4813 | }
4814 | offset += slen;
4815 | }
4816 | return offset;
4817 | }
4818 |
4819 | static void
4820 | ssh_process_payload(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, ssh_channel_info_t *channel)
4821 | {
4822 | tvbuff_t *next_tvb = tvb_new_subset_remaining(tvb, offset);
4823 | if (channel->handle) {
4824 | call_dissector(channel->handle, next_tvb, pinfo, proto_tree_get_root(tree));
4825 | } else {
4826 | call_data_dissector(next_tvb, pinfo, proto_tree_get_root(tree));
4827 | }
4828 | }
4829 |
4830 | static void
4831 | print_ssh_fragment_tree(fragment_head *ipfd_head, proto_tree *tree, proto_tree *ssh_tree, packet_info *pinfo, tvbuff_t *next_tvb)
4832 | {
4833 | proto_item *ssh_tree_item, *frag_tree_item;
4834 |
4835 | /*
4836 | * The subdissector thought it was completely
4837 | * desegmented (although the stuff at the
4838 | * end may, in turn, require desegmentation),
4839 | * so we show a tree with all segments.
4840 | */
4841 | show_fragment_tree(ipfd_head, &ssh_segment_items,
4842 | tree, pinfo, next_tvb, &frag_tree_item);
4843 | /*
4844 | * The toplevel fragment subtree is now
4845 | * behind all desegmented data; move it
4846 | * right behind the SSH tree.
4847 | */
4848 | ssh_tree_item = proto_tree_get_parent(ssh_tree);
4849 | /* The SSH protocol item is up a few levels from the message tree */
4850 | ssh_tree_item = proto_item_get_parent_nth(ssh_tree_item, 2);
4851 | if (frag_tree_item && ssh_tree_item) {
4852 | proto_tree_move_item(tree, ssh_tree_item, frag_tree_item);
4853 | }
4854 | }
4855 |
4856 | static uint32_t
4857 | ssh_msp_fragment_id(struct tcp_multisegment_pdu *msp)
4858 | {
4859 | /*
4860 | * If a frame contains multiple PDUs, then "first_frame" is not
4861 | * sufficient to uniquely identify groups of fragments. Therefore we use
4862 | * the tcp reassembly functions that also test msp->seq (the position of
4863 | * the initial fragment in the SSH channel).
4864 | */
4865 | return msp->first_frame;
4866 | }
4867 |
4868 | static void
4869 | ssh_proto_tree_add_segment_data(
4870 | proto_tree *tree,
4871 | tvbuff_t *tvb,
4872 | int offset,
4873 | int length,
4874 | const char *prefix)
4875 | {
4876 | proto_tree_add_bytes_format(
4877 | tree,
4878 | hf_ssh_segment_data,
4879 | tvb,
4880 | offset,
4881 | length,
4882 | NULL((void*)0),
4883 | "%sSSH segment data (%u %s)",
4884 | prefix != NULL((void*)0) ? prefix : "",
4885 | length,
4886 | plurality(length, "byte", "bytes")((length) == 1 ? ("byte") : ("bytes")));
4887 | }
4888 |
4889 | static void
4890 | desegment_ssh(tvbuff_t *tvb, packet_info *pinfo, uint32_t seq,
4891 | uint32_t nxtseq, proto_tree *tree, ssh_channel_info_t *channel)
4892 | {
4893 | fragment_head *ipfd_head;
4894 | bool_Bool must_desegment;
4895 | bool_Bool called_dissector;
4896 | unsigned another_pdu_follows;
4897 | bool_Bool another_segment_in_frame = false0;
4898 | int deseg_offset, offset = 0;
4899 | uint32_t deseg_seq;
4900 | int nbytes;
4901 | proto_item *item;
4902 | struct tcp_multisegment_pdu *msp;
4903 | bool_Bool first_pdu = true1;
4904 |
4905 | again:
4906 | ipfd_head = NULL((void*)0);
4907 | must_desegment = false0;
4908 | called_dissector = false0;
4909 | another_pdu_follows = 0;
4910 | msp = NULL((void*)0);
4911 |
4912 | /*
4913 | * Initialize these to assume no desegmentation.
4914 | * If that's not the case, these will be set appropriately
4915 | * by the subdissector.
4916 | */
4917 | pinfo->desegment_offset = 0;
4918 | pinfo->desegment_len = 0;
4919 |
4920 | /*
4921 | * Initialize this to assume that this segment will just be
4922 | * added to the middle of a desegmented chunk of data, so
4923 | * that we should show it all as data.
4924 | * If that's not the case, it will be set appropriately.
4925 | */
4926 | deseg_offset = offset;
4927 |
4928 | /* If we've seen this segment before (e.g., it's a retransmission),
4929 | * there's nothing for us to do. Certainly, don't add it to the list
4930 | * of multisegment_pdus (that would cause subsequent lookups to find
4931 | * the retransmission instead of the original transmission, breaking
4932 | * dissection of the desegmented pdu if we'd already seen the end of
4933 | * the pdu).
4934 | */
4935 | if ((msp = (struct tcp_multisegment_pdu *)wmem_tree_lookup32(channel->multisegment_pdus, seq))) {
4936 | const char *prefix;
4937 | bool_Bool is_retransmission = false0;
4938 |
4939 | if (msp->first_frame == pinfo->num) {
4940 | /* This must be after the first pass. */
4941 | prefix = "";
4942 | if (msp->last_frame == pinfo->num) {
4943 | col_clear(pinfo->cinfo, COL_INFO);
4944 | } else {
4945 | if (first_pdu) {
4946 | col_append_sep_str(pinfo->cinfo, COL_INFO, " ", "[SSH segment of a reassembled PDU]");
4947 | }
4948 | }
4949 | } else {
4950 | prefix = "Retransmitted ";
4951 | is_retransmission = true1;
4952 | }
4953 |
4954 | if (!is_retransmission) {
4955 | ipfd_head = fragment_get(&ssh_reassembly_table, pinfo, msp->first_frame, msp);
4956 | if (ipfd_head != NULL((void*)0) && ipfd_head->reassembled_in !=0 &&
4957 | ipfd_head->reassembled_in != pinfo->num) {
4958 | /* Show what frame this was reassembled in if not this one. */
4959 | item=proto_tree_add_uint(tree, *ssh_segment_items.hf_reassembled_in,
4960 | tvb, 0, 0, ipfd_head->reassembled_in);
4961 | proto_item_set_generated(item);
4962 | }
4963 | }
4964 | nbytes = tvb_reported_length_remaining(tvb, offset);
4965 | ssh_proto_tree_add_segment_data(tree, tvb, offset, nbytes, prefix);
4966 | return;
4967 | }
4968 |
4969 | /* Else, find the most previous PDU starting before this sequence number */
4970 | msp = (struct tcp_multisegment_pdu *)wmem_tree_lookup32_le(channel->multisegment_pdus, seq-1);
4971 | if (msp && msp->seq <= seq && msp->nxtpdu > seq) {
4972 | unsigned len;
4973 |
4974 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
4975 | msp->last_frame = pinfo->num;
4976 | msp->last_frame_time = pinfo->abs_ts;
4977 | }
4978 |
4979 | /* OK, this PDU was found, which means the segment continues
4980 | * a higher-level PDU and that we must desegment it.
4981 | */
4982 | if (msp->flags & MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001) {
4983 | /* The dissector asked for the entire segment */
4984 | len = tvb_reported_length_remaining(tvb, offset);
4985 | } else {
4986 | len = MIN(nxtseq, msp->nxtpdu)(((nxtseq) < (msp->nxtpdu)) ? (nxtseq) : (msp->nxtpdu )) - seq;
4987 | }
4988 |
4989 | ipfd_head = fragment_add(&ssh_reassembly_table, tvb, offset,
4990 | pinfo, ssh_msp_fragment_id(msp), msp,
4991 | seq - msp->seq,
4992 | len, (LT_SEQ (nxtseq,msp->nxtpdu)((int32_t)((nxtseq) - (msp->nxtpdu)) < 0)));
4993 |
4994 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)
4995 | && msp->flags & MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001) {
4996 | msp->flags &= (~MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001);
4997 |
4998 | /* If we consumed the entire segment there is no
4999 | * other pdu starting anywhere inside this segment.
5000 | * So update nxtpdu to point at least to the start
5001 | * of the next segment.
5002 | * (If the subdissector asks for even more data we
5003 | * will advance nxtpdu even further later down in
5004 | * the code.)
5005 | */
5006 | msp->nxtpdu = nxtseq;
5007 | }
5008 |
5009 | if ( (msp->nxtpdu < nxtseq)
5010 | && (msp->nxtpdu >= seq)
5011 | && (len > 0)) {
5012 | another_pdu_follows = msp->nxtpdu - seq;
5013 | }
5014 | } else {
5015 | /* This segment was not found in our table, so it doesn't
5016 | * contain a continuation of a higher-level PDU.
5017 | * Call the normal subdissector.
5018 | */
5019 | ssh_process_payload(tvb, offset, pinfo, tree, channel);
5020 | called_dissector = true1;
5021 |
5022 | /* Did the subdissector ask us to desegment some more data
5023 | * before it could handle the packet?
5024 | * If so we have to create some structures in our table but
5025 | * this is something we only do the first time we see this
5026 | * packet.
5027 | */
5028 | if (pinfo->desegment_len) {
5029 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))
5030 | must_desegment = true1;
5031 |
5032 | /*
5033 | * Set "deseg_offset" to the offset in "tvb"
5034 | * of the first byte of data that the
5035 | * subdissector didn't process.
5036 | */
5037 | deseg_offset = offset + pinfo->desegment_offset;
5038 | }
5039 |
5040 | /* Either no desegmentation is necessary, or this is
5041 | * segment contains the beginning but not the end of
5042 | * a higher-level PDU and thus isn't completely
5043 | * desegmented.
5044 | */
5045 | ipfd_head = NULL((void*)0);
5046 | }
5047 |
5048 | /* is it completely desegmented? */
5049 | if (ipfd_head && ipfd_head->reassembled_in == pinfo->num) {
5050 | /*
5051 | * Yes, we think it is.
5052 | * We only call subdissector for the last segment.
5053 | * Note that the last segment may include more than what
5054 | * we needed.
5055 | */
5056 | if (nxtseq < msp->nxtpdu) {
5057 | /*
5058 | * This is *not* the last segment. It is part of a PDU in the same
5059 | * frame, so no another PDU can follow this one.
5060 | * Do not reassemble SSH yet, it will be done in the final segment.
5061 | * (If we are reassembling at FIN, we will do that in dissect_ssl()
5062 | * after iterating through all the records.)
5063 | * Clear the Info column and avoid displaying [SSH segment of a
5064 | * reassembled PDU], the payload dissector will typically set it.
5065 | * (This is needed here for the second pass.)
5066 | */
5067 | another_pdu_follows = 0;
5068 | col_clear(pinfo->cinfo, COL_INFO);
5069 | another_segment_in_frame = true1;
5070 | } else {
5071 | /*
5072 | * OK, this is the last segment of the PDU and also the
5073 | * last segment in this frame.
5074 | * Let's call the subdissector with the desegmented
5075 | * data.
5076 | */
5077 | tvbuff_t *next_tvb;
5078 | int old_len;
5079 |
5080 | /*
5081 | * Reset column in case multiple SSH segments form the PDU
5082 | * and this last SSH segment is not in the first TCP segment of
5083 | * this frame.
5084 | * XXX prevent clearing the column if the last layer is not SSH?
5085 | */
5086 | /* Clear column during the first pass. */
5087 | col_clear(pinfo->cinfo, COL_INFO);
5088 |
5089 | /* create a new TVB structure for desegmented data */
5090 | next_tvb = tvb_new_chain(tvb, ipfd_head->tvb_data);
5091 |
5092 | /* add desegmented data to the data source list */
5093 | add_new_data_source(pinfo, next_tvb, "Reassembled SSH");
5094 |
5095 | /* call subdissector */
5096 | ssh_process_payload(next_tvb, 0, pinfo, tree, channel);
5097 | called_dissector = true1;
5098 |
5099 | /*
5100 | * OK, did the subdissector think it was completely
5101 | * desegmented, or does it think we need even more
5102 | * data?
5103 | */
5104 | old_len = (int)(tvb_reported_length(next_tvb) - tvb_reported_length_remaining(tvb, offset));
5105 | if (pinfo->desegment_len && pinfo->desegment_offset <= old_len) {
5106 | /*
5107 | * "desegment_len" isn't 0, so it needs more
5108 | * data for something - and "desegment_offset"
5109 | * is before "old_len", so it needs more data
5110 | * to dissect the stuff we thought was
5111 | * completely desegmented (as opposed to the
5112 | * stuff at the beginning being completely
5113 | * desegmented, but the stuff at the end
5114 | * being a new higher-level PDU that also
5115 | * needs desegmentation).
5116 | */
5117 | fragment_set_partial_reassembly(&ssh_reassembly_table,
5118 | pinfo, ssh_msp_fragment_id(msp), msp);
5119 | /* Update msp->nxtpdu to point to the new next
5120 | * pdu boundary.
5121 | */
5122 | if (pinfo->desegment_len == DESEGMENT_ONE_MORE_SEGMENT0x0fffffff) {
5123 | /* We want reassembly of at least one
5124 | * more segment so set the nxtpdu
5125 | * boundary to one byte into the next
5126 | * segment.
5127 | * This means that the next segment
5128 | * will complete reassembly even if it
5129 | * is only one single byte in length.
5130 | */
5131 | msp->nxtpdu = seq + tvb_reported_length_remaining(tvb, offset) + 1;
5132 | msp->flags |= MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001;
5133 | } else if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5134 | /* This is not the first segment, and we thought reassembly
5135 | * would be done now, but now we know we desegment at FIN.
5136 | * E.g., a HTTP response where the headers were split
5137 | * across segments (so previous ONE_MORE_SEGMENT) and
5138 | * also no Content-Length (so now DESEGMENT_UNTIL_FIN).
5139 | */
5140 | channel->flags |= TCP_FLOW_REASSEMBLE_UNTIL_FIN0x0001;
5141 | msp->nxtpdu = nxtseq + 0x40000000;
5142 | } else {
5143 | msp->nxtpdu = seq + tvb_reported_length_remaining(tvb, offset) + pinfo->desegment_len;
5144 | }
5145 | /* Since we need at least some more data
5146 | * there can be no pdu following in the
5147 | * tail of this segment.
5148 | */
5149 | another_pdu_follows = 0;
5150 | } else {
5151 | /*
5152 | * Show the stuff in this TCP segment as
5153 | * just raw TCP segment data.
5154 | */
5155 | nbytes = another_pdu_follows > 0
5156 | ? another_pdu_follows
5157 | : tvb_reported_length_remaining(tvb, offset);
5158 | ssh_proto_tree_add_segment_data(tree, tvb, offset, nbytes, NULL((void*)0));
5159 |
5160 | /* Show details of the reassembly */
5161 | print_ssh_fragment_tree(ipfd_head, proto_tree_get_root(tree), tree, pinfo, next_tvb);
5162 |
5163 | /* Did the subdissector ask us to desegment
5164 | * some more data? This means that the data
5165 | * at the beginning of this segment completed
5166 | * a higher-level PDU, but the data at the
5167 | * end of this segment started a higher-level
5168 | * PDU but didn't complete it.
5169 | *
5170 | * If so, we have to create some structures
5171 | * in our table, but this is something we
5172 | * only do the first time we see this packet.
5173 | */
5174 | if (pinfo->desegment_len) {
5175 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))
5176 | must_desegment = true1;
5177 |
5178 | /* The stuff we couldn't dissect
5179 | * must have come from this segment,
5180 | * so it's all in "tvb".
5181 | *
5182 | * "pinfo->desegment_offset" is
5183 | * relative to the beginning of
5184 | * "next_tvb"; we want an offset
5185 | * relative to the beginning of "tvb".
5186 | *
5187 | * First, compute the offset relative
5188 | * to the *end* of "next_tvb" - i.e.,
5189 | * the number of bytes before the end
5190 | * of "next_tvb" at which the
5191 | * subdissector stopped. That's the
5192 | * length of "next_tvb" minus the
5193 | * offset, relative to the beginning
5194 | * of "next_tvb, at which the
5195 | * subdissector stopped.
5196 | */
5197 | deseg_offset = ipfd_head->datalen - pinfo->desegment_offset;
5198 |
5199 | /* "tvb" and "next_tvb" end at the
5200 | * same byte of data, so the offset
5201 | * relative to the end of "next_tvb"
5202 | * of the byte at which we stopped
5203 | * is also the offset relative to
5204 | * the end of "tvb" of the byte at
5205 | * which we stopped.
5206 | *
5207 | * Convert that back into an offset
5208 | * relative to the beginning of
5209 | * "tvb", by taking the length of
5210 | * "tvb" and subtracting the offset
5211 | * relative to the end.
5212 | */
5213 | deseg_offset = tvb_reported_length(tvb) - deseg_offset;
5214 | }
5215 | }
5216 | }
5217 | }
5218 |
5219 | if (must_desegment) {
5220 | /* If the dissector requested "reassemble until FIN"
5221 | * just set this flag for the flow and let reassembly
5222 | * proceed at normal. We will check/pick up these
5223 | * reassembled PDUs later down in dissect_tcp() when checking
5224 | * for the FIN flag.
5225 | */
5226 | if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5227 | channel->flags |= TCP_FLOW_REASSEMBLE_UNTIL_FIN0x0001;
5228 | }
5229 | /*
5230 | * The sequence number at which the stuff to be desegmented
5231 | * starts is the sequence number of the byte at an offset
5232 | * of "deseg_offset" into "tvb".
5233 | *
5234 | * The sequence number of the byte at an offset of "offset"
5235 | * is "seq", i.e. the starting sequence number of this
5236 | * segment, so the sequence number of the byte at
5237 | * "deseg_offset" is "seq + (deseg_offset - offset)".
5238 | */
5239 | deseg_seq = seq + (deseg_offset - offset);
5240 |
5241 | if (((nxtseq - deseg_seq) <= 1024*1024)
5242 | && (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))) {
5243 | if (pinfo->desegment_len == DESEGMENT_ONE_MORE_SEGMENT0x0fffffff) {
5244 | /* The subdissector asked to reassemble using the
5245 | * entire next segment.
5246 | * Just ask reassembly for one more byte
5247 | * but set this msp flag so we can pick it up
5248 | * above.
5249 | */
5250 | msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5251 | deseg_seq, nxtseq+1, channel->multisegment_pdus);
5252 | msp->flags |= MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001;
5253 | } else if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5254 | /* Set nxtseq very large so that reassembly won't happen
5255 | * until we force it at the end of the stream in dissect_ssl()
5256 | * outside this function.
5257 | */
5258 | msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5259 | deseg_seq, nxtseq+0x40000000, channel->multisegment_pdus);
5260 | } else {
5261 | msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5262 | deseg_seq, nxtseq+pinfo->desegment_len, channel->multisegment_pdus);
5263 | }
5264 |
5265 | /* add this segment as the first one for this new pdu */
5266 | fragment_add(&ssh_reassembly_table, tvb, deseg_offset,
5267 | pinfo, ssh_msp_fragment_id(msp), msp,
5268 | 0, nxtseq - deseg_seq,
5269 | LT_SEQ(nxtseq, msp->nxtpdu)((int32_t)((nxtseq) - (msp->nxtpdu)) < 0));
5270 | }
5271 | }
5272 |
5273 | if (!called_dissector || pinfo->desegment_len != 0) {
5274 | if (ipfd_head != NULL((void*)0) && ipfd_head->reassembled_in != 0 &&
5275 | ipfd_head->reassembled_in != pinfo->num &&
5276 | !(ipfd_head->flags & FD_PARTIAL_REASSEMBLY0x0040)) {
5277 | /*
5278 | * We know what other frame this PDU is reassembled in;
5279 | * let the user know.
5280 | */
5281 | item=proto_tree_add_uint(tree, *ssh_segment_items.hf_reassembled_in,
5282 | tvb, 0, 0, ipfd_head->reassembled_in);
5283 | proto_item_set_generated(item);
5284 | }
5285 |
5286 | /*
5287 | * Either we didn't call the subdissector at all (i.e.,
5288 | * this is a segment that contains the middle of a
5289 | * higher-level PDU, but contains neither the beginning
5290 | * nor the end), or the subdissector couldn't dissect it
5291 | * all, as some data was missing (i.e., it set
5292 | * "pinfo->desegment_len" to the amount of additional
5293 | * data it needs).
5294 | */
5295 | if (!another_segment_in_frame && pinfo->desegment_offset == 0) {
5296 | /*
5297 | * It couldn't, in fact, dissect any of it (the
5298 | * first byte it couldn't dissect is at an offset
5299 | * of "pinfo->desegment_offset" from the beginning
5300 | * of the payload, and that's 0).
5301 | * Just mark this as SSH.
5302 | */
5303 |
5304 | /* SFTP checks the length before setting the protocol column.
5305 | * If other subdissectors don't do this, we'd want to set the
5306 | * protocol column back - but we want to get the SSH version
5307 | */
5308 | //col_set_str(pinfo->cinfo, COL_PROTOCOL,
5309 | // val_to_str_const(session->version, ssl_version_short_names, "SSH"));
5310 | if (first_pdu) {
5311 | col_append_sep_str(pinfo->cinfo, COL_INFO, " ", "[SSH segment of a reassembled PDU]");
5312 | }
5313 | }
5314 |
5315 | /*
5316 | * Show what's left in the packet as just raw SSH segment data.
5317 | * XXX - remember what protocol the last subdissector
5318 | * was, and report it as a continuation of that, instead?
5319 | */
5320 | nbytes = tvb_reported_length_remaining(tvb, deseg_offset);
5321 | ssh_proto_tree_add_segment_data(tree, tvb, deseg_offset, nbytes, NULL((void*)0));
5322 | }
5323 | pinfo->can_desegment = 0;
5324 | pinfo->desegment_offset = 0;
5325 | pinfo->desegment_len = 0;
5326 |
5327 | if (another_pdu_follows) {
5328 | /* there was another pdu following this one. */
5329 | pinfo->can_desegment=2;
5330 | /* we also have to prevent the dissector from changing the
5331 | * PROTOCOL and INFO colums since what follows may be an
5332 | * incomplete PDU and we don't want it be changed back from
5333 | * <Protocol> to <SSH>
5334 | */
5335 | col_set_fence(pinfo->cinfo, COL_INFO);
5336 | col_set_writable(pinfo->cinfo, COL_PROTOCOL, false0);
5337 | first_pdu = false0;
5338 | offset += another_pdu_follows;
5339 | seq += another_pdu_follows;
5340 | goto again;
5341 | }
5342 | }
5343 |
5344 | static void
5345 | ssh_dissect_channel_data(tvbuff_t *tvb, packet_info *pinfo,
5346 | struct ssh_peer_data *peer_data _U___attribute__((unused)), proto_tree *tree,
5347 | ssh_message_info_t *message _U___attribute__((unused)), ssh_channel_info_t *channel)
5348 | {
5349 |
5350 | uint16_t save_can_desegment = pinfo->can_desegment;
5351 |
5352 | if (ssh_desegment) {
5353 | pinfo->can_desegment = 2;
5354 | desegment_ssh(tvb, pinfo, message->byte_seq, message->next_byte_seq, tree, channel);
5355 | } else {
5356 | pinfo->can_desegment = 0;
5357 | bool_Bool save_fragmented = pinfo->fragmented;
5358 | pinfo->fragmented = true1;
5359 |
5360 | ssh_process_payload(tvb, 0, pinfo, tree, channel);
5361 | pinfo->fragmented = save_fragmented;
5362 | }
5363 |
5364 | pinfo->can_desegment = save_can_desegment;
5365 | }
5366 |
5367 | static int
5368 | ssh_dissect_term_modes(tvbuff_t *tvb, packet_info *pinfo _U___attribute__((unused)), proto_tree *tree)
5369 | {
5370 | proto_item *ti;
5371 | proto_tree *term_mode_tree, *subtree;
5372 | int offset = 0;
5373 | uint32_t opcode, value, idx;
5374 | bool_Bool boolval;
5375 |
5376 | struct tty_opt_info {
5377 | unsigned id;
5378 | int *hfindex;
5379 | };
5380 | static const struct tty_opt_info tty_opts[] = {
5381 | { SSH_TTY_OP_END0, NULL((void*)0)},
5382 | { SSH_TTY_OP_VINTR1, &hf_ssh_pty_term_mode_vintr },
5383 | { SSH_TTY_OP_VQUIT2, &hf_ssh_pty_term_mode_vquit },
5384 | { SSH_TTY_OP_VERASE3, &hf_ssh_pty_term_mode_verase },
5385 | { SSH_TTY_OP_VKILL4, &hf_ssh_pty_term_mode_vkill },
5386 | { SSH_TTY_OP_VEOF5, &hf_ssh_pty_term_mode_veof },
5387 | { SSH_TTY_OP_VEOL6, &hf_ssh_pty_term_mode_veol },
5388 | { SSH_TTY_OP_VEOL27, &hf_ssh_pty_term_mode_veol2 },
5389 | { SSH_TTY_OP_VSTART8, &hf_ssh_pty_term_mode_vstart },
5390 | { SSH_TTY_OP_VSTOP9, &hf_ssh_pty_term_mode_vstop },
5391 | { SSH_TTY_OP_VSUSP10, &hf_ssh_pty_term_mode_vsusp },
5392 | { SSH_TTY_OP_VDSUSP11, &hf_ssh_pty_term_mode_vdsusp },
5393 | { SSH_TTY_OP_VREPRINT12, &hf_ssh_pty_term_mode_vreprint },
5394 | { SSH_TTY_OP_VWERASE13, &hf_ssh_pty_term_mode_vwerase },
5395 | { SSH_TTY_OP_VLNEXT14, &hf_ssh_pty_term_mode_vlnext },
5396 | { SSH_TTY_OP_VFLUSH15, &hf_ssh_pty_term_mode_vflush },
5397 | { SSH_TTY_OP_VSWTCH16, &hf_ssh_pty_term_mode_vswtch },
5398 | { SSH_TTY_OP_VSTATUS17, &hf_ssh_pty_term_mode_vstatus },
5399 | { SSH_TTY_OP_VDISCARD18, &hf_ssh_pty_term_mode_vdiscard },
5400 | { SSH_TTY_OP_IGNPAR30, &hf_ssh_pty_term_mode_ignpar },
5401 | { SSH_TTY_OP_PARMRK31, &hf_ssh_pty_term_mode_parmrk },
5402 | { SSH_TTY_OP_INPCK32, &hf_ssh_pty_term_mode_inpck },
5403 | { SSH_TTY_OP_ISTRIP33, &hf_ssh_pty_term_mode_istrip },
5404 | { SSH_TTY_OP_INLCR34, &hf_ssh_pty_term_mode_inlcr },
5405 | { SSH_TTY_OP_IGNCR35, &hf_ssh_pty_term_mode_igncr },
5406 | { SSH_TTY_OP_ICRNL36, &hf_ssh_pty_term_mode_icrnl },
5407 | { SSH_TTY_OP_IUCLC37, &hf_ssh_pty_term_mode_iuclc },
5408 | { SSH_TTY_OP_IXON38, &hf_ssh_pty_term_mode_ixon },
5409 | { SSH_TTY_OP_IXANY39, &hf_ssh_pty_term_mode_ixany },
5410 | { SSH_TTY_OP_IXOFF40, &hf_ssh_pty_term_mode_ixoff },
5411 | { SSH_TTY_OP_IMAXBEL41, &hf_ssh_pty_term_mode_imaxbel },
5412 | { SSH_TTY_OP_IUTF842, &hf_ssh_pty_term_mode_iutf8 },
5413 | { SSH_TTY_OP_ISIG50, &hf_ssh_pty_term_mode_isig },
5414 | { SSH_TTY_OP_ICANON51, &hf_ssh_pty_term_mode_icanon },
5415 | { SSH_TTY_OP_XCASE52, &hf_ssh_pty_term_mode_xcase },
5416 | { SSH_TTY_OP_ECHO53, &hf_ssh_pty_term_mode_echo },
5417 | { SSH_TTY_OP_ECHOE54, &hf_ssh_pty_term_mode_echoe },
5418 | { SSH_TTY_OP_ECHOK55, &hf_ssh_pty_term_mode_echok },
5419 | { SSH_TTY_OP_ECHONL56, &hf_ssh_pty_term_mode_echonl },
5420 | { SSH_TTY_OP_NOFLSH57, &hf_ssh_pty_term_mode_noflsh },
5421 | { SSH_TTY_OP_TOSTOP58, &hf_ssh_pty_term_mode_tostop },
5422 | { SSH_TTY_OP_IEXTEN59, &hf_ssh_pty_term_mode_iexten },
5423 | { SSH_TTY_OP_ECHOCTL60, &hf_ssh_pty_term_mode_echoctl },
5424 | { SSH_TTY_OP_ECHOKE61, &hf_ssh_pty_term_mode_echoke },
5425 | { SSH_TTY_OP_PENDIN62, &hf_ssh_pty_term_mode_pendin },
5426 | { SSH_TTY_OP_OPOST70, &hf_ssh_pty_term_mode_opost },
5427 | { SSH_TTY_OP_OLCUC71, &hf_ssh_pty_term_mode_olcuc },
5428 | { SSH_TTY_OP_ONLCR72, &hf_ssh_pty_term_mode_onlcr },
5429 | { SSH_TTY_OP_OCRNL73, &hf_ssh_pty_term_mode_ocrnl },
5430 | { SSH_TTY_OP_ONOCR74, &hf_ssh_pty_term_mode_onocr },
5431 | { SSH_TTY_OP_ONLRET75, &hf_ssh_pty_term_mode_onlret },
5432 | { SSH_TTY_OP_CS790, &hf_ssh_pty_term_mode_cs7 },
5433 | { SSH_TTY_OP_CS891, &hf_ssh_pty_term_mode_cs8 },
5434 | { SSH_TTY_OP_PARENB92, &hf_ssh_pty_term_mode_parenb },
5435 | { SSH_TTY_OP_PARODD93, &hf_ssh_pty_term_mode_parodd },
5436 | { SSH_TTY_OP_ISPEED128, &hf_ssh_pty_term_mode_ispeed },
5437 | { SSH_TTY_OP_OSPEED129, &hf_ssh_pty_term_mode_ospeed }
5438 | };
5439 |
5440 | ti = proto_tree_add_item(tree, hf_ssh_pty_term_modes, tvb, offset, tvb_reported_length(tvb), ENC_NA0x00000000);
5441 | term_mode_tree = proto_item_add_subtree(ti, ett_term_modes);
5442 | while (tvb_reported_length_remaining(tvb, offset)) {
5443 | ti = proto_tree_add_item(term_mode_tree, hf_ssh_pty_term_mode, tvb, offset, 5, ENC_NA0x00000000);
5444 | subtree = proto_item_add_subtree(ti, ett_term_mode);
5445 | proto_tree_add_item_ret_uint(subtree, hf_ssh_pty_term_mode_opcode, tvb, offset, 1, ENC_NA0x00000000, &opcode);
5446 | proto_item_append_text(ti, ": %s", val_to_str_const(opcode, ssh_tty_op_vals, "Unknown"));
5447 | offset += 1;
5448 | if (opcode == SSH_TTY_OP_END0) {
5449 | break;
5450 | }
5451 | for (idx = 0; idx < array_length(tty_opts)(sizeof (tty_opts) / sizeof (tty_opts)[0]); idx++) {
5452 | if (tty_opts[idx].id == opcode) break;
5453 | }
5454 | if (idx >= array_length(tty_opts)(sizeof (tty_opts) / sizeof (tty_opts)[0])) {
5455 | proto_tree_add_item_ret_uint(subtree, hf_ssh_pty_term_mode_value, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &value);
5456 | proto_item_append_text(ti, "=%d", value);
5457 | } else {
5458 | DISSECTOR_ASSERT(tty_opts[idx].hfindex)((void) ((tty_opts[idx].hfindex) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c" , 5458, "tty_opts[idx].hfindex"))));
5459 | int hfindex = *tty_opts[idx].hfindex;
5460 | switch (proto_registrar_get_ftype(hfindex)) {
5461 | case FT_BOOLEAN:
5462 | proto_tree_add_item_ret_boolean(subtree, hfindex, tvb, offset + 3, 1, ENC_NA0x00000000, &boolval);
5463 | proto_item_append_text(ti, "=%s", boolval ? "True" : "False");
5464 | break;
5465 | case FT_CHAR:
5466 | proto_tree_add_item_ret_uint(subtree, hfindex, tvb, offset + 3, 1, ENC_NA0x00000000, &value);
5467 | proto_item_append_text(ti, "='%s'", format_char(pinfo->pool, (char)value));
5468 | break;
5469 | case FT_UINT32:
5470 | proto_tree_add_item_ret_uint(subtree, hfindex, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &value);
5471 | proto_item_append_text(ti, "=%d", value);
5472 | break;
5473 | default:
5474 | DISSECTOR_ASSERT_NOT_REACHED()(proto_report_dissector_bug("%s:%u: failed assertion \"DISSECTOR_ASSERT_NOT_REACHED\"" , "epan/dissectors/packet-ssh.c", 5474));
5475 | }
5476 | }
5477 | offset += 4;
5478 | }
5479 | return offset;
5480 | }
5481 |
5482 | static int
5483 | ssh_dissect_connection_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
5484 | struct ssh_peer_data *peer_data, int offset, proto_tree *msg_type_tree,
5485 | unsigned msg_code, ssh_message_info_t *message)
5486 | {
5487 | uint32_t recipient_channel, sender_channel;
5488 |
5489 | if (msg_code == SSH_MSG_CHANNEL_OPEN90) {
5490 | uint32_t slen;
5491 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_type_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5492 | offset += 4;
5493 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_type_name, packet_tvb, offset, slen, ENC_UTF_80x00000002);
5494 | offset += slen;
5495 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_sender_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5496 | offset += 4;
5497 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_initial_window, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5498 | offset += 4;
5499 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_maximum_packet_size, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5500 | offset += 4;
5501 | } else if (msg_code == SSH_MSG_CHANNEL_OPEN_CONFIRMATION91) {
5502 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &recipient_channel);
5503 | offset += 4;
5504 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_sender_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &sender_channel);
5505 | offset += 4;
5506 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5507 | create_channel(peer_data, recipient_channel, sender_channel);
5508 | }
5509 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_initial_window, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5510 | offset += 4;
5511 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_maximum_packet_size, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5512 | offset += 4;
5513 | } else if (msg_code == SSH_MSG_CHANNEL_WINDOW_ADJUST93) {
5514 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5515 | offset += 4;
5516 | proto_tree_add_item(msg_type_tree, hf_ssh_channel_window_adjust, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000); // TODO: maintain count of transferred bytes and window size
5517 | offset += 4;
5518 | } else if (msg_code == SSH_MSG_CHANNEL_DATA94) {
5519 | proto_item* ti = proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &recipient_channel);
5520 | offset += 4;
5521 | // TODO: process according to the type of channel
5522 | uint32_t slen;
5523 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_data_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5524 | offset += 4;
5525 | tvbuff_t* next_tvb = tvb_new_subset_length(packet_tvb, offset, slen);
5526 |
5527 | ssh_channel_info_t* channel = get_channel_info_for_channel(peer_data, recipient_channel);
5528 | if (channel) {
5529 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5530 | message->byte_seq = channel->byte_seq;
5531 | channel->byte_seq += slen;
5532 | message->next_byte_seq = channel->byte_seq;
5533 | }
5534 | ssh_dissect_channel_data(next_tvb, pinfo, peer_data, msg_type_tree, message, channel);
5535 | } else {
5536 | expert_add_info_format(pinfo, ti, &ei_ssh_channel_number, "Could not find configuration for channel %d", recipient_channel);
5537 | }
5538 | offset += slen;
5539 | } else if (msg_code == SSH_MSG_CHANNEL_EXTENDED_DATA95) {
5540 | proto_item* ti = proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &recipient_channel);
5541 | offset += 4;
5542 | // TODO: process according to the type of channel
5543 | proto_tree_add_item(msg_type_tree, hf_ssh_channel_data_type_code, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5544 | offset += 4;
5545 | uint32_t slen;
5546 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_data_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5547 | offset += 4;
5548 | tvbuff_t* next_tvb = tvb_new_subset_length(packet_tvb, offset, slen);
5549 |
5550 | ssh_channel_info_t* channel = get_channel_info_for_channel(peer_data, recipient_channel);
5551 | if (channel) {
5552 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5553 | message->byte_seq = channel->byte_seq;
5554 | channel->byte_seq += slen;
5555 | message->next_byte_seq = channel->byte_seq;
5556 | }
5557 | ssh_dissect_channel_data(next_tvb, pinfo, peer_data, msg_type_tree, message, channel);
5558 | } else {
5559 | expert_add_info_format(pinfo, ti, &ei_ssh_channel_number, "Could not find configuration for channel %d", recipient_channel);
5560 | }
5561 | offset += slen;
5562 | } else if (msg_code == SSH_MSG_CHANNEL_EOF96) {
5563 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5564 | offset += 4;
5565 | } else if (msg_code == SSH_MSG_CHANNEL_CLOSE97) {
5566 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5567 | offset += 4;
5568 | } else if (msg_code == SSH_MSG_CHANNEL_REQUEST98) {
5569 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &recipient_channel);
5570 | offset += 4;
5571 | const char* request_name;
5572 | uint32_t slen;
5573 | int item_len;
5574 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_request_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5575 | offset += 4;
5576 | proto_tree_add_item_ret_string(msg_type_tree, hf_ssh_channel_request_name, packet_tvb, offset, slen, ENC_UTF_80x00000002, pinfo->pool, (const uint8_t**)&request_name);
5577 | offset += slen;
5578 | proto_tree_add_item(msg_type_tree, hf_ssh_channel_request_want_reply, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5579 | offset += 1;
5580 | /* RFC 4254 6.5: "Only one of these requests ["shell", "exec",
5581 | * or "subsystem"] can succeed per channel." Set up the
5582 | * appropriate handler for future CHANNEL_DATA and
5583 | * CHANNEL_EXTENDED_DATA messages on the channel.
5584 | *
5585 | * XXX - For "shell" and "exec", it might make more sense to send
5586 | * CHANNEL_DATA to the "data-text-lines" dissector rather than "data".
5587 | * Ideally if a pty has been setup there would be a way to interpret
5588 | * the escape codes.
5589 | */
5590 | if (0 == strcmp(request_name, "subsystem")) {
5591 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_subsystem_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5592 | offset += 4;
5593 | const char* subsystem_name;
5594 | proto_tree_add_item_ret_string(msg_type_tree, hf_ssh_subsystem_name, packet_tvb, offset, slen, ENC_UTF_80x00000002, pinfo->pool, (const uint8_t**)&subsystem_name);
5595 | set_subdissector_for_channel(peer_data, recipient_channel, subsystem_name);
5596 | offset += slen;
5597 | } else if (0 == strcmp(request_name, "env")) {
5598 | /* The encoding for "env" variables and "exec" commands is not
5599 | * specified in the SSH protocol, and must match whatever the
5600 | * server expects. (Unlike CHANNEL_DATA, it is not affected by
5601 | * whatever is in "env" or anything else in the protocol, and the
5602 | * strings are passed to execve directly.) In practice the strings
5603 | * must not have internal NULs (no UTF-16), and OpenSSH for Windows
5604 | * and IBM z/OS force the use of UTF-8 and ISO-8859-1, respectively.
5605 | *
5606 | * These will probably be ASCII-compatible.
5607 | */
5608 | proto_tree_add_item_ret_length(msg_type_tree, hf_ssh_env_name, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000 | ENC_UTF_80x00000002, &item_len);
5609 | offset += item_len;
5610 | proto_tree_add_item_ret_length(msg_type_tree, hf_ssh_env_value, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000 | ENC_UTF_80x00000002, &item_len);
5611 | offset += item_len;
5612 | } else if (0 == strcmp(request_name, "exec")) {
5613 | proto_tree_add_item_ret_length(msg_type_tree, hf_ssh_exec_cmd, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000 | ENC_UTF_80x00000002, &item_len);
5614 | offset += item_len;
5615 | set_subdissector_for_channel(peer_data, recipient_channel, "exec");
5616 | } else if (0 == strcmp(request_name, "exit-status")) {
5617 | proto_tree_add_item(msg_type_tree, hf_ssh_exit_status, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5618 | offset += 4;
5619 | } else if (0 == strcmp(request_name, "shell")) {
5620 | set_subdissector_for_channel(peer_data, recipient_channel, "shell");
5621 | } else if (0 == strcmp(request_name, "pty-req")) {
5622 | proto_tree_add_item_ret_length(msg_type_tree, hf_ssh_pty_term, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000 | ENC_UTF_80x00000002, &item_len);
5623 | offset += item_len;
5624 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_width_char, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5625 | offset += 4;
5626 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_height_row, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5627 | offset += 4;
5628 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_width_pixel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5629 | offset += 4;
5630 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_height_pixel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5631 | offset += 4;
5632 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_pty_term_modes_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5633 | offset += 4;
5634 | offset += ssh_dissect_term_modes(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
5635 | }
5636 | } else if (msg_code == SSH_MSG_CHANNEL_SUCCESS99) {
5637 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5638 | offset += 4;
5639 | }
5640 | return offset;
5641 | }
5642 |
5643 | /* Channel mapping {{{ */
5644 |
5645 | /* The usual flow:
5646 | * 1. client sends SSH_MSG_CHANNEL_OPEN with its (sender) channel number
5647 | * 2. server responds with SSH_MSG_CHANNEL_OPEN_CONFIRMATION with
5648 | * its channel number and echoing the client's number, creating
5649 | * a bijective map
5650 | * 3. client sends SSH_MSG_CHANNEL_REQUEST which has the name of
5651 | * the shell, command, or subsystem to start. This has the recipient's
5652 | * channel number (i.e. the server's)
5653 | * 4. server may send back a SSG_MSG_CHANNEL_SUCCESS (or _FAILURE) with
5654 | * the the recipient (i.e., client) channel number, but this does not
5655 | * contain the subsystem name or anything identifying the request to
5656 | * which it responds. It MUST be sent in the same order as the
5657 | * corresponding request message (RFC 4254 4 Global Requests), so we
5658 | * could track it that way, but for our purposes we just treat all
5659 | * requests as successes. (If not, either there won't be data or another
5660 | * request will supercede it later.)
5661 | *
5662 | * Either side can open a channel (RFC 4254 5 Channel Mechanism). The
5663 | * typical flow is the client opening a channel, but in the case of
5664 | * remote port forwarding (7 TCP/IP Port Forwarding) the directions are
5665 | * swapped. For port forwarding, all the information is contained in the
5666 | * SSH_MSG_CHANNEL_OPEN, there is no SSH_MSG_CHANNEL_REQUEST.
5667 | *
5668 | * XXX: Channel numbers can be re-used after being closed (5.3 Closing a
5669 | * Channel), but not necessarily mapped to the same channel number on the
5670 | * other side. If that actually happens, the right way to handle this is
5671 | * to track the state changes over time for random packet access (e.g.,
5672 | * using a multimap with the packet number instead of maps.)
5673 | */
5674 |
5675 | static struct ssh_peer_data*
5676 | get_other_peer_data(struct ssh_peer_data *peer_data)
5677 | {
5678 | bool_Bool is_server = &peer_data->global_data->peer_data[SERVER_PEER_DATA1]==peer_data;
5679 | if (is_server) {
5680 | return &peer_data->global_data->peer_data[CLIENT_PEER_DATA0];
5681 | } else {
5682 | return &peer_data->global_data->peer_data[SERVER_PEER_DATA1];
5683 | }
5684 | }
5685 |
5686 | /* Create pairings between a recipient channel and the sender's channel,
5687 | * from a SSH_MSG_CHANNEL_OPEN_CONFIRMATION. */
5688 | static void
5689 | create_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, uint32_t sender_channel)
5690 | {
5691 | if (peer_data->channel_info == NULL((void*)0)) {
5692 | peer_data->channel_info = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5693 | }
5694 | wmem_map_insert(peer_data->channel_info, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)), GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)));
5695 |
5696 | if (peer_data->channel_handles == NULL((void*)0)) {
5697 | peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5698 | }
5699 |
5700 | ssh_channel_info_t *new_channel = wmem_new0(wmem_file_scope(), ssh_channel_info_t)((ssh_channel_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (ssh_channel_info_t)));
5701 | new_channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5702 | wmem_map_insert(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), new_channel);
5703 |
5704 | /* If the recipient channel is already configured in the other direction,
5705 | * set the handle. We need this if we eventually handle port forwarding,
5706 | * where all the information to handle the traffic is sent in the
5707 | * SSH_MSG_CHANNEL_OPEN message before the CONFIRMATION. It might also
5708 | * help if the packets are out of order (i.e. we get the client
5709 | * CHANNEL_REQUEST before the CHANNEL_OPEN_CONFIRMATION.)
5710 | */
5711 | struct ssh_peer_data *other_peer_data = get_other_peer_data(peer_data);
5712 | if (other_peer_data->channel_handles) {
5713 | ssh_channel_info_t *peer_channel = wmem_map_lookup(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)));
5714 | if (peer_channel) {
5715 | new_channel->handle = peer_channel->handle;
5716 | }
5717 | }
5718 | }
5719 |
5720 | static ssh_channel_info_t*
5721 | get_channel_info_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel)
5722 | {
5723 | if (peer_data->channel_handles == NULL((void*)0)) {
5724 | return NULL((void*)0);
5725 | }
5726 | ssh_channel_info_t *channel = wmem_map_lookup(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)));
5727 |
5728 | return channel;
5729 | }
5730 |
5731 | static void
5732 | set_subdissector_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, const char* subsystem_name)
5733 | {
5734 | dissector_handle_t handle = NULL((void*)0);
5735 | if (0 == strcmp(subsystem_name, "sftp")) {
5736 | handle = sftp_handle;
5737 | } else if (0 == strcmp(subsystem_name, "shell") ||
5738 | 0 == strcmp(subsystem_name, "exec")) {
5739 | handle = data_text_lines_handle;
5740 | }
5741 |
5742 | if (handle) {
5743 | /* Map this handle to the recipient channel */
5744 | ssh_channel_info_t *channel = NULL((void*)0);
5745 | if (peer_data->channel_handles == NULL((void*)0)) {
5746 | peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5747 | } else {
5748 | channel = wmem_map_lookup(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)));
5749 | }
5750 | if (channel == NULL((void*)0)) {
5751 | channel = wmem_new0(wmem_file_scope(), ssh_channel_info_t)((ssh_channel_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (ssh_channel_info_t)));
5752 | channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5753 | wmem_map_insert(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), channel);
5754 | }
5755 | channel->handle = handle;
5756 |
5757 | /* This recipient channel is the sender channel for the other side.
5758 | * Do we know what the recipient channel on the other side is? */
5759 | struct ssh_peer_data *other_peer_data = get_other_peer_data(peer_data);
5760 |
5761 | wmem_map_t *channel_info = other_peer_data->channel_info;
5762 | if (channel_info) {
5763 | void *sender_channel_p;
5764 | if (wmem_map_lookup_extended(channel_info, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), NULL((void*)0), &sender_channel_p)) {
5765 | uint32_t sender_channel = GPOINTER_TO_UINT(sender_channel_p)((guint) (gulong) (sender_channel_p));
5766 | /* Yes. See the handle for the other side too. */
5767 | if (other_peer_data->channel_handles == NULL((void*)0)) {
5768 | other_peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5769 | channel = NULL((void*)0);
5770 | } else {
5771 | channel = wmem_map_lookup(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)));
5772 | }
5773 | if (channel == NULL((void*)0)) {
5774 | channel = wmem_new0(wmem_file_scope(), ssh_channel_info_t)((ssh_channel_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (ssh_channel_info_t)));
5775 | channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5776 | wmem_map_insert(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)), channel);
5777 | }
5778 | channel->handle = handle;
5779 | }
5780 | }
5781 | }
5782 | }
5783 |
5784 | /* Channel mapping. }}} */
5785 |
5786 | static int
5787 | ssh_dissect_connection_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
5788 | int offset, proto_item *msg_type_tree, unsigned msg_code)
5789 | {
5790 | (void)pinfo;
5791 | if(msg_code==SSH_MSG_GLOBAL_REQUEST80){
5792 | const char* request_name;
5793 | unsigned slen;
5794 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5795 | proto_tree_add_item(msg_type_tree, hf_ssh_global_request_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5796 | offset += 4;
5797 | request_name = (char*)tvb_get_string_enc(pinfo->pool, packet_tvb, offset, slen, ENC_ASCII0x00000000|ENC_NA0x00000000);
5798 | proto_tree_add_item(msg_type_tree, hf_ssh_global_request_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
5799 | offset += slen;
5800 | proto_tree_add_item(msg_type_tree, hf_ssh_global_request_want_reply, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5801 | offset += 1;
5802 | if (0 == strcmp(request_name, "hostkeys-00@openssh.com") ||
5803 | 0 == strcmp(request_name, "hostkeys-prove-00@openssh.com")) {
5804 | while (tvb_reported_length_remaining(packet_tvb, offset)) {
5805 | offset += ssh_tree_add_hostkey(packet_tvb, pinfo, offset, msg_type_tree,
5806 | "Server host key", ett_key_exchange_host_key, NULL((void*)0));
5807 | }
5808 | }
5809 | }
5810 | return offset;
5811 | }
5812 |
5813 | static int
5814 | ssh_dissect_local_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
5815 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code) {
5816 | unsigned slen;
5817 | if (peer_data->global_data->ext_ping_openssh_offered && msg_code >= SSH_MSG_PING192 && msg_code <= SSH_MSG_PONG193) {
5818 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_ext_ping_msg_vals, "Unknown (%u)"));
5819 | proto_tree_add_item(msg_type_tree, hf_ssh2_ext_ping_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5820 | offset += 1;
5821 | if (msg_code == SSH_MSG_PING192) {
5822 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5823 | proto_tree_add_item(msg_type_tree, hf_ssh_ping_data_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5824 | offset += 4;
5825 | proto_tree_add_item(msg_type_tree, hf_ssh_ping_data, packet_tvb, offset, slen, ENC_NA0x00000000);
5826 | offset += slen;
5827 | } else if (msg_code == SSH_MSG_PONG193) {
5828 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5829 | proto_tree_add_item(msg_type_tree, hf_ssh_pong_data_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5830 | offset += 4;
5831 | proto_tree_add_item(msg_type_tree, hf_ssh_pong_data, packet_tvb, offset, slen, ENC_NA0x00000000);
5832 | offset += slen;
5833 | }
5834 | } else {
5835 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
5836 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5837 | offset += 1;
5838 | }
5839 | return offset;
5840 | }
5841 |
5842 | static int
5843 | ssh_dissect_public_key_blob(tvbuff_t *tvb, packet_info *pinfo, proto_item *tree)
5844 | {
5845 | uint32_t slen;
5846 | const char* key_type;
5847 |
5848 | int offset = 0;
5849 | proto_tree *blob_tree = NULL((void*)0);
5850 | proto_item *blob_item = NULL((void*)0);
5851 |
5852 | blob_item = proto_tree_add_item(tree, hf_ssh_blob, tvb, offset, tvb_reported_length(tvb), ENC_NA0x00000000);
5853 | blob_tree = proto_item_add_subtree(blob_item, ett_userauth_pk_blob);
5854 | proto_tree_add_item_ret_uint(blob_tree, hf_ssh_pk_blob_name_length, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5855 | offset += 4;
5856 | proto_tree_add_item_ret_string(blob_tree, hf_ssh_pk_blob_name, tvb, offset, slen, ENC_ASCII0x00000000, pinfo->pool, (const uint8_t**)&key_type);
5857 | proto_item_append_text(blob_item, " (type: %s)", key_type);
5858 | offset += slen;
5859 |
5860 | if (0 == strcmp(key_type, "ssh-rsa")) {
5861 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_e);
5862 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_n);
5863 | } else if (0 == strcmp(key_type, "ssh-dss")) {
5864 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_p);
5865 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_q);
5866 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_g);
5867 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_y);
5868 | } else if (g_str_has_prefix(key_type, "ecdsa-sha2-")(__builtin_constant_p ("ecdsa-sha2-")? __extension__ ({ const char * const __str = (key_type); const char * const __prefix = ("ecdsa-sha2-"); gboolean __result = (0); if (__str == ((void *)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix); else { const size_t __str_len = strlen (( (__str) + !(__str))); const size_t __prefix_len = strlen (((__prefix ) + !(__prefix))); if (__str_len >= __prefix_len) __result = memcmp (((__str) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len ) == 0; } __result; }) : (g_str_has_prefix) (key_type, "ecdsa-sha2-" ) )) {
5869 | offset += ssh_tree_add_string(tvb, offset, blob_tree,
5870 | hf_ssh_blob_ecdsa_curve_id, hf_ssh_blob_ecdsa_curve_id_length);
5871 | offset += ssh_tree_add_string(tvb, offset, blob_tree,
5872 | hf_ssh_blob_ecdsa_q, hf_ssh_blob_ecdsa_q_length);
5873 | } else if (g_str_has_prefix(key_type, "ssh-ed")(__builtin_constant_p ("ssh-ed")? __extension__ ({ const char * const __str = (key_type); const char * const __prefix = ("ssh-ed" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (key_type, "ssh-ed") )) {
5874 | offset += ssh_tree_add_string(tvb, offset, blob_tree,
5875 | hf_ssh_blob_eddsa_key, hf_ssh_blob_eddsa_key_length);
5876 | } else {
5877 | proto_tree_add_item(blob_tree, hf_ssh_blob_data, tvb, offset, tvb_reported_length_remaining(tvb, offset), ENC_NA0x00000000);
5878 | offset += tvb_reported_length_remaining(tvb, offset);
5879 | }
5880 |
5881 | return offset;
5882 | }
5883 |
5884 | static int
5885 | ssh_dissect_public_key_signature(tvbuff_t *packet_tvb, packet_info *pinfo,
5886 | int offset, proto_item *msg_type_tree)
5887 | {
5888 | (void)pinfo;
5889 | unsigned slen;
5890 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5891 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_blob_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5892 | offset += 4;
5893 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_blob_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
5894 | offset += slen;
5895 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5896 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_s_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5897 | offset += 4;
5898 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_s, packet_tvb, offset, slen, ENC_NA0x00000000);
5899 | offset += slen;
5900 | return offset;
5901 | }
5902 |
5903 | #ifdef SSH_DECRYPT_DEBUG /* {{{ */
5904 |
5905 | static FILE* ssh_debug_file;
5906 |
5907 | static void
5908 | ssh_prefs_apply_cb(void)
5909 | {
5910 | ssh_set_debug(ssh_debug_file_name);
5911 | }
5912 |
5913 | static void
5914 | ssh_set_debug(const char* name)
5915 | {
5916 | static int debug_file_must_be_closed;
5917 | int use_stderr;
5918 |
5919 | use_stderr = name?(strcmp(name, SSH_DEBUG_USE_STDERR"-") == 0):0;
5920 |
5921 | if (debug_file_must_be_closed)
5922 | fclose(ssh_debug_file);
5923 |
5924 | if (use_stderr)
5925 | ssh_debug_file = stderrstderr;
5926 | else if (!name || (strcmp(name, "") ==0))
5927 | ssh_debug_file = NULL((void*)0);
5928 | else
5929 | ssh_debug_file = ws_fopenfopen(name, "w");
5930 |
5931 | if (!use_stderr && ssh_debug_file)
5932 | debug_file_must_be_closed = 1;
5933 | else
5934 | debug_file_must_be_closed = 0;
5935 |
5936 | ssh_debug_printf("Wireshark SSH debug log \n\n");
5937 | #ifdef HAVE_LIBGNUTLS1
5938 | ssh_debug_printf("GnuTLS version: %s\n", gnutls_check_version(NULL((void*)0)));
5939 | #endif
5940 | ssh_debug_printf("Libgcrypt version: %s\n", gcry_check_version(NULL((void*)0)));
5941 | ssh_debug_printf("\n");
5942 | }
5943 |
5944 | static void
5945 | ssh_debug_flush(void)
5946 | {
5947 | if (ssh_debug_file)
5948 | fflush(ssh_debug_file);
5949 | }
5950 |
5951 | static void
5952 | ssh_debug_printf(const char* fmt, ...)
5953 | {
5954 | va_list ap;
5955 |
5956 | if (!ssh_debug_file)
5957 | return;
5958 |
5959 | va_start(ap, fmt)__builtin_va_start(ap, fmt);
5960 | vfprintf(ssh_debug_file, fmt, ap);
5961 | va_end(ap)__builtin_va_end(ap);
5962 | }
5963 |
5964 | static void
5965 | ssh_print_data(const char* name, const unsigned char* data, size_t len)
5966 | {
5967 | size_t i, j, k;
5968 | if (!ssh_debug_file)
5969 | return;
5970 | #ifdef OPENSSH_STYLE
5971 | fprintf(ssh_debug_file,"%s[%d]\n",name, (int) len);
5972 | #else
5973 | fprintf(ssh_debug_file,"%s[%d]:\n",name, (int) len);
5974 | #endif
5975 | for (i=0; i<len; i+=16) {
5976 | #ifdef OPENSSH_STYLE
5977 | fprintf(ssh_debug_file,"%04u: ", (unsigned int)i);
5978 | #else
5979 | fprintf(ssh_debug_file,"| ");
5980 | #endif
5981 | for (j=i, k=0; k<16 && j<len; ++j, ++k)
5982 | fprintf(ssh_debug_file,"%.2x ",data[j]);
5983 | for (; k<16; ++k)
5984 | fprintf(ssh_debug_file," ");
5985 | #ifdef OPENSSH_STYLE
5986 | fputc(' ', ssh_debug_file);
5987 | #else
5988 | fputc('|', ssh_debug_file);
5989 | #endif
5990 | for (j=i, k=0; k<16 && j<len; ++j, ++k) {
5991 | unsigned char c = data[j];
5992 | if (!g_ascii_isprint(c)((g_ascii_table[(guchar) (c)] & G_ASCII_PRINT) != 0) || (c=='\t')) c = '.';
5993 | fputc(c, ssh_debug_file);
5994 | }
5995 | #ifdef OPENSSH_STYLE
5996 | fprintf(ssh_debug_file,"\n");
5997 | #else
5998 | for (; k<16; ++k)
5999 | fputc(' ', ssh_debug_file);
6000 | fprintf(ssh_debug_file,"|\n");
6001 | #endif
6002 | }
6003 | }
6004 |
6005 | #endif /* SSH_DECRYPT_DEBUG }}} */
6006 |
6007 | static void
6008 | ssh_secrets_block_callback(const void *secrets, unsigned size)
6009 | {
6010 | ssh_keylog_process_lines((const uint8_t *)secrets, size);
6011 | }
6012 |
6013 | /* Functions for SSH random hashtables. {{{ */
6014 | static int
6015 | ssh_equal (const void *v, const void *v2)
6016 | {
6017 | if (v == NULL((void*)0) || v2 == NULL((void*)0)) {
6018 | return 0;
6019 | }
6020 |
6021 | const ssh_bignum *val1;
6022 | const ssh_bignum *val2;
6023 | val1 = (const ssh_bignum *)v;
6024 | val2 = (const ssh_bignum *)v2;
6025 |
6026 | if (val1->length == val2->length &&
6027 | !memcmp(val1->data, val2->data, val2->length)) {
6028 | return 1;
6029 | }
6030 | return 0;
6031 | }
6032 |
6033 | static unsigned
6034 | ssh_hash (const void *v)
6035 | {
6036 | unsigned l,hash;
6037 | const ssh_bignum* id;
6038 | const unsigned* cur;
6039 |
6040 | if (v == NULL((void*)0)) {
6041 | return 0;
6042 | }
6043 |
6044 | hash = 0;
6045 | id = (const ssh_bignum*) v;
6046 |
6047 | /* id and id->data are mallocated in ssh_save_master_key(). As such 'data'
6048 | * should be aligned for any kind of access (for example as a unsigned as
6049 | * is done below). The intermediate void* cast is to prevent "cast
6050 | * increases required alignment of target type" warnings on CPUs (such
6051 | * as SPARCs) that do not allow misaligned memory accesses.
6052 | */
6053 | cur = (const unsigned*)(void*) id->data;
6054 |
6055 | for (l=4; (l < id->length); l+=4, cur++)
6056 | hash = hash ^ (*cur);
6057 |
6058 | return hash;
6059 | }
6060 |
6061 | static void
6062 | ssh_free_glib_allocated_bignum(void *data)
6063 | {
6064 | ssh_bignum * bignum;
6065 | if (data == NULL((void*)0)) {
6066 | return;
6067 | }
6068 |
6069 | bignum = (ssh_bignum *) data;
6070 | g_free(bignum->data);
6071 | g_free(bignum);
6072 | }
6073 |
6074 | static void
6075 | ssh_free_glib_allocated_entry(void *data)
6076 | {
6077 | ssh_key_map_entry_t * entry;
6078 | if (data == NULL((void*)0)) {
6079 | return;
6080 | }
6081 |
6082 | entry = (ssh_key_map_entry_t *) data;
6083 | g_free(entry->type);
6084 | ssh_free_glib_allocated_bignum(entry->key_material);
6085 | g_free(entry);
6086 | }
6087 | /* Functions for SSH random hashtables. }}} */
6088 |
6089 | static void
6090 | ssh_shutdown(void) {
6091 | g_hash_table_destroy(ssh_master_key_map);
6092 | }
6093 |
6094 | void
6095 | proto_register_ssh(void)
6096 | {
6097 | static hf_register_info hf[] = {
6098 | { &hf_ssh_protocol,
6099 | { "Protocol", "ssh.protocol",
6100 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6101 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6102 |
6103 | { &hf_ssh_packet_length,
6104 | { "Packet Length", "ssh.packet_length",
6105 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6106 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6107 |
6108 | { &hf_ssh_packet_length_encrypted,
6109 | { "Packet Length (encrypted)", "ssh.packet_length_encrypted",
6110 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6111 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6112 |
6113 | { &hf_ssh_padding_length,
6114 | { "Padding Length", "ssh.padding_length",
6115 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6116 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6117 |
6118 | { &hf_ssh_payload,
6119 | { "Payload", "ssh.payload",
6120 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6121 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6122 |
6123 | { &hf_ssh_encrypted_packet,
6124 | { "Encrypted Packet", "ssh.encrypted_packet",
6125 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6126 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6127 |
6128 | { &hf_ssh_padding_string,
6129 | { "Padding String", "ssh.padding_string",
6130 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6131 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6132 |
6133 | { &hf_ssh_seq_num,
6134 | { "Sequence number", "ssh.seq_num",
6135 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6136 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6137 |
6138 | { &hf_ssh_mac_string,
6139 | { "MAC", "ssh.mac",
6140 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6141 | "Message authentication code", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6142 |
6143 | { &hf_ssh_mac_status,
6144 | { "MAC Status", "ssh.mac.status", FT_UINT8, BASE_NONE, VALS(proto_checksum_vals)((0 ? (const struct _value_string*)0 : ((proto_checksum_vals) ))), 0x0,
6145 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6146 |
6147 | { &hf_ssh_direction,
6148 | { "Direction", "ssh.direction",
6149 | FT_BOOLEAN, BASE_NONE, TFS(&tfs_s2c_c2s)((0 ? (const struct true_false_string*)0 : ((&tfs_s2c_c2s )))), 0x0,
6150 | "Message direction", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6151 |
6152 | { &hf_ssh_msg_code,
6153 | { "Message Code", "ssh.message_code",
6154 | FT_UINT8, BASE_DEC, VALS(ssh1_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh1_msg_vals)))), 0x0,
6155 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6156 |
6157 | { &hf_ssh2_msg_code,
6158 | { "Message Code", "ssh.message_code",
6159 | FT_UINT8, BASE_DEC, VALS(ssh2_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_msg_vals)))), 0x0,
6160 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6161 |
6162 | { &hf_ssh2_kex_dh_msg_code,
6163 | { "Message Code", "ssh.message_code",
6164 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_dh_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_dh_msg_vals )))), 0x0,
6165 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6166 |
6167 | { &hf_ssh2_kex_dh_gex_msg_code,
6168 | { "Message Code", "ssh.message_code",
6169 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_dh_gex_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_dh_gex_msg_vals )))), 0x0,
6170 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6171 |
6172 | { &hf_ssh2_kex_ecdh_msg_code,
6173 | { "Message Code", "ssh.message_code",
6174 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_ecdh_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_ecdh_msg_vals )))), 0x0,
6175 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6176 |
6177 | { &hf_ssh2_kex_hybrid_msg_code,
6178 | { "Message Code", "ssh.message_code",
6179 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_hybrid_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_hybrid_msg_vals )))), 0x0,
6180 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6181 |
6182 | { &hf_ssh2_ext_ping_msg_code,
6183 | { "Message Code", "ssh.message_code",
6184 | FT_UINT8, BASE_DEC, VALS(ssh2_ext_ping_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_ext_ping_msg_vals )))), 0x0,
6185 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6186 |
6187 | { &hf_ssh_cookie,
6188 | { "Cookie", "ssh.cookie",
6189 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6190 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6191 |
6192 | { &hf_ssh_kex_algorithms,
6193 | { "kex_algorithms string", "ssh.kex_algorithms",
6194 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6195 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6196 |
6197 | { &hf_ssh_server_host_key_algorithms,
6198 | { "server_host_key_algorithms string", "ssh.server_host_key_algorithms",
6199 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6200 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6201 |
6202 | { &hf_ssh_encryption_algorithms_client_to_server,
6203 | { "encryption_algorithms_client_to_server string", "ssh.encryption_algorithms_client_to_server",
6204 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6205 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6206 |
6207 | { &hf_ssh_encryption_algorithms_server_to_client,
6208 | { "encryption_algorithms_server_to_client string", "ssh.encryption_algorithms_server_to_client",
6209 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6210 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6211 |
6212 | { &hf_ssh_mac_algorithms_client_to_server,
6213 | { "mac_algorithms_client_to_server string", "ssh.mac_algorithms_client_to_server",
6214 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6215 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6216 |
6217 | { &hf_ssh_mac_algorithms_server_to_client,
6218 | { "mac_algorithms_server_to_client string", "ssh.mac_algorithms_server_to_client",
6219 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6220 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6221 |
6222 | { &hf_ssh_compression_algorithms_client_to_server,
6223 | { "compression_algorithms_client_to_server string", "ssh.compression_algorithms_client_to_server",
6224 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6225 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6226 |
6227 | { &hf_ssh_compression_algorithms_server_to_client,
6228 | { "compression_algorithms_server_to_client string", "ssh.compression_algorithms_server_to_client",
6229 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6230 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6231 |
6232 | { &hf_ssh_languages_client_to_server,
6233 | { "languages_client_to_server string", "ssh.languages_client_to_server",
6234 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6235 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6236 |
6237 | { &hf_ssh_languages_server_to_client,
6238 | { "languages_server_to_client string", "ssh.languages_server_to_client",
6239 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6240 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6241 |
6242 | { &hf_ssh_kex_algorithms_length,
6243 | { "kex_algorithms length", "ssh.kex_algorithms_length",
6244 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6245 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6246 |
6247 | { &hf_ssh_server_host_key_algorithms_length,
6248 | { "server_host_key_algorithms length", "ssh.server_host_key_algorithms_length",
6249 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6250 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6251 |
6252 | { &hf_ssh_encryption_algorithms_client_to_server_length,
6253 | { "encryption_algorithms_client_to_server length", "ssh.encryption_algorithms_client_to_server_length",
6254 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6255 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6256 |
6257 | { &hf_ssh_encryption_algorithms_server_to_client_length,
6258 | { "encryption_algorithms_server_to_client length", "ssh.encryption_algorithms_server_to_client_length",
6259 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6260 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6261 |
6262 | { &hf_ssh_mac_algorithms_client_to_server_length,
6263 | { "mac_algorithms_client_to_server length", "ssh.mac_algorithms_client_to_server_length",
6264 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6265 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6266 |
6267 | { &hf_ssh_mac_algorithms_server_to_client_length,
6268 | { "mac_algorithms_server_to_client length", "ssh.mac_algorithms_server_to_client_length",
6269 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6270 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6271 |
6272 | { &hf_ssh_compression_algorithms_client_to_server_length,
6273 | { "compression_algorithms_client_to_server length", "ssh.compression_algorithms_client_to_server_length",
6274 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6275 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6276 |
6277 | { &hf_ssh_compression_algorithms_server_to_client_length,
6278 | { "compression_algorithms_server_to_client length", "ssh.compression_algorithms_server_to_client_length",
6279 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6280 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6281 |
6282 | { &hf_ssh_languages_client_to_server_length,
6283 | { "languages_client_to_server length", "ssh.languages_client_to_server_length",
6284 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6285 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6286 |
6287 | { &hf_ssh_languages_server_to_client_length,
6288 | { "languages_server_to_client length", "ssh.languages_server_to_client_length",
6289 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6290 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6291 |
6292 | { &hf_ssh_first_kex_packet_follows,
6293 | { "First KEX Packet Follows", "ssh.first_kex_packet_follows",
6294 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6295 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6296 |
6297 | { &hf_ssh_kex_reserved,
6298 | { "Reserved", "ssh.kex.reserved",
6299 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6300 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6301 |
6302 | { &hf_ssh_kex_hassh_algo,
6303 | { "hasshAlgorithms", "ssh.kex.hassh_algorithms",
6304 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6305 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6306 |
6307 | { &hf_ssh_kex_hassh,
6308 | { "hassh", "ssh.kex.hassh",
6309 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6310 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6311 |
6312 | { &hf_ssh_kex_hasshserver_algo,
6313 | { "hasshServerAlgorithms", "ssh.kex.hasshserver_algorithms",
6314 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6315 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6316 |
6317 | { &hf_ssh_kex_hasshserver,
6318 | { "hasshServer", "ssh.kex.hasshserver",
6319 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6320 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6321 |
6322 | { &hf_ssh_hostkey_length,
6323 | { "Host key length", "ssh.host_key.length",
6324 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6325 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6326 |
6327 | { &hf_ssh_hostkey_type_length,
6328 | { "Host key type length", "ssh.host_key.type_length",
6329 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6330 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6331 |
6332 | { &hf_ssh_hostkey_type,
6333 | { "Host key type", "ssh.host_key.type",
6334 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6335 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6336 |
6337 | { &hf_ssh_hostkey_data,
6338 | { "Host key data", "ssh.host_key.data",
6339 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6340 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6341 |
6342 | { &hf_ssh_hostkey_rsa_n,
6343 | { "RSA modulus (N)", "ssh.host_key.rsa.n",
6344 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6345 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6346 |
6347 | { &hf_ssh_hostkey_rsa_e,
6348 | { "RSA public exponent (e)", "ssh.host_key.rsa.e",
6349 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6350 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6351 |
6352 | { &hf_ssh_hostkey_dsa_p,
6353 | { "DSA prime modulus (p)", "ssh.host_key.dsa.p",
6354 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6355 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6356 |
6357 | { &hf_ssh_hostkey_dsa_q,
6358 | { "DSA prime divisor (q)", "ssh.host_key.dsa.q",
6359 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6360 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6361 |
6362 | { &hf_ssh_hostkey_dsa_g,
6363 | { "DSA subgroup generator (g)", "ssh.host_key.dsa.g",
6364 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6365 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6366 |
6367 | { &hf_ssh_hostkey_dsa_y,
6368 | { "DSA public key (y)", "ssh.host_key.dsa.y",
6369 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6370 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6371 |
6372 | { &hf_ssh_hostkey_ecdsa_curve_id,
6373 | { "ECDSA elliptic curve identifier", "ssh.host_key.ecdsa.id",
6374 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6375 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6376 |
6377 | { &hf_ssh_hostkey_ecdsa_curve_id_length,
6378 | { "ECDSA elliptic curve identifier length", "ssh.host_key.ecdsa.id_length",
6379 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6380 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6381 |
6382 | { &hf_ssh_hostkey_ecdsa_q,
6383 | { "ECDSA public key (Q)", "ssh.host_key.ecdsa.q",
6384 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6385 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6386 |
6387 | { &hf_ssh_hostkey_ecdsa_q_length,
6388 | { "ECDSA public key length", "ssh.host_key.ecdsa.q_length",
6389 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6390 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6391 |
6392 | { &hf_ssh_hostkey_eddsa_key,
6393 | { "EdDSA public key", "ssh.host_key.eddsa.key",
6394 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6395 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6396 |
6397 | { &hf_ssh_hostkey_eddsa_key_length,
6398 | { "EdDSA public key length", "ssh.host_key.eddsa.key_length",
6399 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6400 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6401 |
6402 | { &hf_ssh_hostsig_length,
6403 | { "Host signature length", "ssh.host_sig.length",
6404 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6405 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6406 |
6407 | { &hf_ssh_hostsig_type_length,
6408 | { "Host signature type length", "ssh.host_sig.type_length",
6409 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6410 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6411 |
6412 | { &hf_ssh_hostsig_type,
6413 | { "Host signature type", "ssh.host_sig.type",
6414 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6415 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6416 |
6417 | { &hf_ssh_hostsig_data_length,
6418 | { "Host signature data length", "ssh.host_sig.data_length",
6419 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6420 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6421 |
6422 | { &hf_ssh_hostsig_data,
6423 | { "Host signature data", "ssh.host_sig.data",
6424 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6425 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6426 |
6427 | { &hf_ssh_hostsig_rsa,
6428 | { "RSA signature", "ssh.host_sig.rsa",
6429 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6430 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6431 |
6432 | { &hf_ssh_hostsig_dsa,
6433 | { "DSA signature", "ssh.host_sig.dsa",
6434 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6435 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6436 |
6437 | { &hf_ssh_dh_e,
6438 | { "DH client e", "ssh.dh.e",
6439 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6440 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6441 |
6442 | { &hf_ssh_dh_f,
6443 | { "DH server f", "ssh.dh.f",
6444 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6445 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6446 |
6447 | { &hf_ssh_dh_gex_min,
6448 | { "DH GEX Min", "ssh.dh_gex.min",
6449 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6450 | "Minimal acceptable group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6451 |
6452 | { &hf_ssh_dh_gex_nbits,
6453 | { "DH GEX Number of Bits", "ssh.dh_gex.nbits",
6454 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6455 | "Preferred group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6456 |
6457 | { &hf_ssh_dh_gex_max,
6458 | { "DH GEX Max", "ssh.dh_gex.max",
6459 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6460 | "Maximal acceptable group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6461 |
6462 | { &hf_ssh_dh_gex_p,
6463 | { "DH GEX modulus (P)", "ssh.dh_gex.p",
6464 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6465 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6466 |
6467 | { &hf_ssh_dh_gex_g,
6468 | { "DH GEX base (G)", "ssh.dh_gex.g",
6469 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6470 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6471 |
6472 | { &hf_ssh_ecdh_q_c,
6473 | { "ECDH client's ephemeral public key (Q_C)", "ssh.ecdh.q_c",
6474 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6475 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6476 |
6477 | { &hf_ssh_ecdh_q_c_length,
6478 | { "ECDH client's ephemeral public key length", "ssh.ecdh.q_c_length",
6479 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6480 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6481 |
6482 | { &hf_ssh_ecdh_q_s,
6483 | { "ECDH server's ephemeral public key (Q_S)", "ssh.ecdh.q_s",
6484 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6485 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6486 |
6487 | { &hf_ssh_ecdh_q_s_length,
6488 | { "ECDH server's ephemeral public key length", "ssh.ecdh.q_s_length",
6489 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6490 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6491 |
6492 | { &hf_ssh_mpint_length,
6493 | { "Multi Precision Integer Length", "ssh.mpint_length",
6494 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6495 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6496 |
6497 | { &hf_ssh_ignore_data_length,
6498 | { "Debug message length", "ssh.ignore_data_length",
6499 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6500 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6501 |
6502 | { &hf_ssh_ignore_data,
6503 | { "Ignore data", "ssh.ignore_data",
6504 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6505 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6506 |
6507 | { &hf_ssh_debug_always_display,
6508 | { "Always Display", "ssh.debug_always_display",
6509 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6510 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6511 |
6512 | { &hf_ssh_debug_message_length,
6513 | { "Debug message length", "ssh.debug_name_length",
6514 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6515 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6516 |
6517 | { &hf_ssh_debug_message,
6518 | { "Debug message", "ssh.debug_name",
6519 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6520 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6521 |
6522 | { &hf_ssh_service_name_length,
6523 | { "Service Name length", "ssh.service_name_length",
6524 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6525 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6526 |
6527 | { &hf_ssh_service_name,
6528 | { "Service Name", "ssh.service_name",
6529 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6530 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6531 |
6532 | { &hf_ssh_disconnect_reason,
6533 | { "Disconnect reason", "ssh.disconnect_reason",
6534 | FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
6535 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6536 |
6537 | { &hf_ssh_disconnect_description_length,
6538 | { "Disconnect description length", "ssh.disconnect_description_length",
6539 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6540 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6541 |
6542 | { &hf_ssh_disconnect_description,
6543 | { "Disconnect description", "ssh.disconnect_description",
6544 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6545 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6546 |
6547 | { &hf_ssh_ext_count,
6548 | { "Extension count", "ssh.extension.count",
6549 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6550 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6551 |
6552 | { &hf_ssh_ext_name_length,
6553 | { "Extension name length", "ssh.extension.name_length",
6554 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6555 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6556 |
6557 | { &hf_ssh_ext_name,
6558 | { "Extension name", "ssh.extension.name",
6559 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6560 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6561 |
6562 | { &hf_ssh_ext_value_length,
6563 | { "Extension value length", "ssh.extension.value_length",
6564 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6565 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6566 |
6567 | { &hf_ssh_ext_value,
6568 | { "Extension value", "ssh.extension.value",
6569 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6570 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6571 |
6572 | { &hf_ssh_ext_server_sig_algs_algorithms,
6573 | { "Accepted signature algorithms", "ssh.extension.server_sig_algs.algorithms",
6574 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6575 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6576 |
6577 | { &hf_ssh_ext_delay_compression_algorithms_client_to_server_length,
6578 | { "Compression algorithms (client to server) length", "ssh.extension.delay_compression.compression_algorithms_client_to_server_length",
6579 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6580 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6581 |
6582 | { &hf_ssh_ext_delay_compression_algorithms_client_to_server,
6583 | { "Compression algorithms (client to server)", "ssh.extension.delay_compression.compression_algorithms_client_to_server",
6584 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6585 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6586 |
6587 | { &hf_ssh_ext_delay_compression_algorithms_server_to_client_length,
6588 | { "Compression algorithms (server to client) length", "ssh.extension.delay_compression.compression_algorithms_server_to_client_length",
6589 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6590 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6591 |
6592 | { &hf_ssh_ext_delay_compression_algorithms_server_to_client,
6593 | { "Compression algorithms (server to client)", "ssh.extension.delay_compression.compression_algorithms_server_to_client",
6594 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6595 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6596 |
6597 | { &hf_ssh_ext_no_flow_control_value,
6598 | { "No flow control flag", "ssh.extension.no_flow_control.value",
6599 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6600 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6601 |
6602 | { &hf_ssh_ext_elevation_value,
6603 | { "Elevation flag", "ssh.extension.elevation.value",
6604 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6605 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6606 |
6607 | { &hf_ssh_ext_prop_publickey_algorithms_algorithms,
6608 | { "Public key algorithms", "ssh.extension.prop_publickey_algorithms.algorithms",
6609 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6610 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6611 |
6612 | { &hf_ssh_lang_tag_length,
6613 | { "Language tag length", "ssh.lang_tag_length",
6614 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6615 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6616 |
6617 | { &hf_ssh_lang_tag,
6618 | { "Language tag", "ssh.lang_tag",
6619 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6620 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6621 |
6622 | { &hf_ssh_ping_data_length,
6623 | { "Data length", "ssh.ping_data_length",
6624 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6625 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6626 |
6627 | { &hf_ssh_ping_data,
6628 | { "Data", "ssh.ping_data",
6629 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6630 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6631 |
6632 | { &hf_ssh_pong_data_length,
6633 | { "Data length", "ssh.pong_data_length",
6634 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6635 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6636 |
6637 | { &hf_ssh_pong_data,
6638 | { "Data", "ssh.pong_data",
6639 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6640 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6641 |
6642 |
6643 | { &hf_ssh_userauth_user_name_length,
6644 | { "User Name length", "ssh.userauth_user_name_length",
6645 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6646 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6647 |
6648 | { &hf_ssh_userauth_user_name,
6649 | { "User Name", "ssh.userauth_user_name",
6650 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6651 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6652 |
6653 | { &hf_ssh_userauth_change_password,
6654 | { "Change password", "ssh.userauth.change_password",
6655 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6656 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6657 |
6658 | { &hf_ssh_userauth_service_name_length,
6659 | { "Service Name length", "ssh.userauth_service_name_length",
6660 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6661 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6662 |
6663 | { &hf_ssh_userauth_service_name,
6664 | { "Service Name", "ssh.userauth_service_name",
6665 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6666 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6667 |
6668 | { &hf_ssh_userauth_method_name_length,
6669 | { "Method Name length", "ssh.userauth_method_name_length",
6670 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6671 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6672 |
6673 | { &hf_ssh_userauth_method_name,
6674 | { "Method Name", "ssh.userauth_method_name",
6675 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6676 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6677 |
6678 | { &hf_ssh_userauth_have_signature,
6679 | { "Have signature", "ssh.userauth.have_signature",
6680 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6681 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6682 |
6683 | { &hf_ssh_userauth_password_length,
6684 | { "Password length", "ssh.userauth_password_length",
6685 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6686 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6687 |
6688 | { &hf_ssh_userauth_password,
6689 | { "Password", "ssh.userauth_password",
6690 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6691 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6692 |
6693 | { &hf_ssh_userauth_new_password_length,
6694 | { "New password length", "ssh.userauth_new_password_length",
6695 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6696 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6697 |
6698 | { &hf_ssh_userauth_new_password,
6699 | { "New password", "ssh.userauth_new_password",
6700 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6701 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6702 |
6703 | { &hf_ssh_auth_failure_list_length,
6704 | { "Authentications that can continue list len", "ssh.auth_failure_cont_list_length",
6705 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6706 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6707 |
6708 | { &hf_ssh_auth_failure_list,
6709 | { "Authentications that can continue list", "ssh.auth_failure_cont_list",
6710 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6711 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6712 |
6713 | { &hf_ssh_userauth_partial_success,
6714 | { "Partial success", "ssh.userauth.partial_success",
6715 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6716 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6717 |
6718 | { &hf_ssh_userauth_pka_name_len,
6719 | { "Public key algorithm name length", "ssh.userauth_pka_name_length",
6720 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6721 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6722 |
6723 | { &hf_ssh_userauth_pka_name,
6724 | { "Public key algorithm name", "ssh.userauth_pka_name",
6725 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6726 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6727 |
6728 | { &hf_ssh_pk_blob_name_length,
6729 | { "Public key blob algorithm name length", "ssh.pk_blob_name_length",
6730 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6731 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6732 |
6733 | { &hf_ssh_pk_blob_name,
6734 | { "Public key blob algorithm name", "ssh.pk_blob_name",
6735 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6736 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6737 |
6738 | { &hf_ssh_blob_length,
6739 | { "Public key blob length", "ssh.pk_blob_length",
6740 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6741 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6742 |
6743 | { &hf_ssh_blob,
6744 | { "Public key blob", "ssh.pk_blob",
6745 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6746 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6747 |
6748 | { &hf_ssh_blob_e,
6749 | { "ssh-rsa public exponent (e)", "ssh.pk_blob.ssh-rsa.e",
6750 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6751 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6752 |
6753 | { &hf_ssh_blob_n,
6754 | { "ssh-rsa modulus (n)", "ssh.pk_blob.ssh-rsa.n",
6755 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6756 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6757 |
6758 | { &hf_ssh_blob_dsa_p,
6759 | { "DSA prime modulus (p)", "ssh.pk_blob.dsa.p",
6760 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6761 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6762 |
6763 | { &hf_ssh_blob_dsa_q,
6764 | { "DSA prime divisor (q)", "ssh.pk_blob.dsa.q",
6765 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6766 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6767 |
6768 | { &hf_ssh_blob_dsa_g,
6769 | { "DSA subgroup generator (g)", "ssh.pk_blob.dsa.g",
6770 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6771 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6772 |
6773 | { &hf_ssh_blob_dsa_y,
6774 | { "DSA public key (y)", "ssh.pk_blob.dsa.y",
6775 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6776 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6777 |
6778 | { &hf_ssh_blob_ecdsa_curve_id,
6779 | { "ECDSA elliptic curve identifier", "ssh.pk_blob.ecdsa.id",
6780 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6781 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6782 |
6783 | { &hf_ssh_blob_ecdsa_curve_id_length,
6784 | { "ECDSA elliptic curve identifier length", "ssh.pk_blob.ecdsa.id_length",
6785 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6786 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6787 |
6788 | { &hf_ssh_blob_ecdsa_q,
6789 | { "ECDSA public key (Q)", "ssh.pk_blob.ecdsa.q",
6790 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6791 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6792 |
6793 | { &hf_ssh_blob_ecdsa_q_length,
6794 | { "ECDSA public key length", "ssh.pk_blob.ecdsa.q_length",
6795 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6796 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6797 |
6798 | { &hf_ssh_blob_eddsa_key,
6799 | { "EdDSA public key", "ssh.pk_blob.eddsa.key",
6800 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6801 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6802 |
6803 | { &hf_ssh_blob_eddsa_key_length,
6804 | { "EdDSA public key length", "ssh.pk_blob.eddsa.key_length",
6805 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6806 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6807 |
6808 | { &hf_ssh_blob_data,
6809 | { "Public key blob data", "ssh.pk_blob.data",
6810 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6811 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6812 |
6813 | { &hf_ssh_signature_length,
6814 | { "Public key signature blob length", "ssh.pk_sig_blob_length",
6815 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6816 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6817 |
6818 | { &hf_ssh_pk_sig_blob_name_length,
6819 | { "Public key signature blob algorithm name length", "ssh.pk_sig_blob_name_length",
6820 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6821 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6822 |
6823 | { &hf_ssh_pk_sig_blob_name,
6824 | { "Public key signature blob algorithm name", "ssh.pk_sig_blob_name",
6825 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6826 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6827 |
6828 | { &hf_ssh_pk_sig_s_length,
6829 | { "ssh-rsa signature length", "ssh.sig.ssh-rsa.length",
6830 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6831 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6832 |
6833 | { &hf_ssh_pk_sig_s,
6834 | { "ssh-rsa signature (s)", "ssh.sig.ssh-rsa.s",
6835 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6836 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6837 |
6838 | { &hf_ssh_connection_type_name_len,
6839 | { "Channel type name length", "ssh.connection_type_name_length",
6840 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6841 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6842 |
6843 | { &hf_ssh_connection_type_name,
6844 | { "Channel type name", "ssh.connection_type_name",
6845 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6846 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6847 |
6848 | { &hf_ssh_connection_sender_channel,
6849 | { "Sender channel", "ssh.connection_sender_channel",
6850 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6851 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6852 |
6853 | { &hf_ssh_connection_recipient_channel,
6854 | { "Recipient channel", "ssh.connection_recipient_channel",
6855 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6856 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6857 |
6858 | { &hf_ssh_connection_initial_window,
6859 | { "Initial window size", "ssh.connection_initial_window_size",
6860 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6861 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6862 |
6863 | { &hf_ssh_connection_maximum_packet_size,
6864 | { "Maximum packet size", "ssh.userauth_maximum_packet_size",
6865 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6866 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6867 |
6868 | { &hf_ssh_global_request_name_len,
6869 | { "Global request name length", "ssh.global_request_name_length",
6870 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6871 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6872 |
6873 | { &hf_ssh_global_request_name,
6874 | { "Global request name", "ssh.global_request_name",
6875 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6876 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6877 |
6878 | { &hf_ssh_global_request_want_reply,
6879 | { "Global request want reply", "ssh.global_request_want_reply",
6880 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6881 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6882 |
6883 | { &hf_ssh_global_request_hostkeys_array_len,
6884 | { "Host keys array length", "ssh.global_request_hostkeys",
6885 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6886 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6887 |
6888 | { &hf_ssh_channel_request_name_len,
6889 | { "Channel request name length", "ssh.channel_request_name_length",
6890 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6891 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6892 |
6893 | { &hf_ssh_channel_request_name,
6894 | { "Channel request name", "ssh.channel_request_name",
6895 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6896 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6897 |
6898 | { &hf_ssh_channel_request_want_reply,
6899 | { "Channel request want reply", "ssh.channel_request_want_reply",
6900 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6901 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6902 |
6903 | { &hf_ssh_subsystem_name_len,
6904 | { "Subsystem name length", "ssh.subsystem_name_length",
6905 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6906 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6907 |
6908 | { &hf_ssh_subsystem_name,
6909 | { "Subsystem name", "ssh.subsystem_name",
6910 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6911 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6912 |
6913 | { &hf_ssh_exec_cmd,
6914 | { "Command", "ssh.exec_command",
6915 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6916 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6917 |
6918 | { &hf_ssh_env_name,
6919 | { "Variable name", "ssh.env_name",
6920 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6921 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6922 |
6923 | { &hf_ssh_env_value,
6924 | { "Variable value", "ssh.env_value",
6925 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6926 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6927 |
6928 | { &hf_ssh_pty_term,
6929 | { "TERM environment variable", "ssh.pty_term",
6930 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6931 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6932 |
6933 | { &hf_ssh_pty_term_width_char,
6934 | { "Terminal width, characters", "ssh.pty_term_width_char",
6935 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6936 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6937 |
6938 | { &hf_ssh_pty_term_height_row,
6939 | { "Terminal height, rows", "ssh.pty_term_height_row",
6940 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6941 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6942 |
6943 | { &hf_ssh_pty_term_width_pixel,
6944 | { "Terminal width, pixels", "ssh.pty_term_width_pixel",
6945 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6946 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6947 |
6948 | { &hf_ssh_pty_term_height_pixel,
6949 | { "Terminal height, pixels", "ssh.pty_term_height_pixel",
6950 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6951 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6952 |
6953 | { &hf_ssh_pty_term_modes_len,
6954 | { "Encoded Terminal Modes Length", "ssh.pty_term_modes_length",
6955 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6956 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6957 |
6958 | { &hf_ssh_pty_term_modes,
6959 | { "Encoded Terminal Modes", "ssh.pty_term_modes",
6960 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6961 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6962 |
6963 | { &hf_ssh_pty_term_mode,
6964 | { "Mode", "ssh.pty_term_mode",
6965 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6966 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6967 |
6968 | { &hf_ssh_pty_term_mode_opcode,
6969 | { "Opcode", "ssh.pty_term_mode.opcode",
6970 | FT_UINT8, BASE_DEC, VALS(ssh_tty_op_vals)((0 ? (const struct _value_string*)0 : ((ssh_tty_op_vals)))), 0x0,
6971 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6972 |
6973 | { &hf_ssh_pty_term_mode_vintr,
6974 | { "Interrupt character", "ssh.pty_term_mode.vintr",
6975 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6976 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6977 |
6978 | { &hf_ssh_pty_term_mode_vquit,
6979 | { "Quit character", "ssh.pty_term_mode.vquit",
6980 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6981 | "Sends SIGQUIT on POSIX systems", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6982 |
6983 | { &hf_ssh_pty_term_mode_verase,
6984 | { "Erase the character to the left of the cursor", "ssh.pty_term_mode.verase",
6985 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6986 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6987 |
6988 | { &hf_ssh_pty_term_mode_vkill,
6989 | { "Kill the current input line", "ssh.pty_term_mode.vkill",
6990 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6991 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6992 |
6993 | { &hf_ssh_pty_term_mode_veof,
6994 | { "End-of-file character", "ssh.pty_term_mode.veof",
6995 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6996 | "Sends EOF from the terminal", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6997 |
6998 | { &hf_ssh_pty_term_mode_veol,
6999 | { "End-of-line character", "ssh.pty_term_mode.veol",
7000 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7001 | "In additional to carriage return and/or line feed", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7002 |
7003 | { &hf_ssh_pty_term_mode_veol2,
7004 | { "Additional end-of-line character", "ssh.pty_term_mode.veol2",
7005 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7006 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7007 |
7008 | { &hf_ssh_pty_term_mode_vstart,
7009 | { "Continues paused output", "ssh.pty_term_mode.vstart",
7010 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7011 | "Normally Control-Q", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
7012 |
7013 | { &hf_ssh_pty_term_mode_vstop,
7014 | { "Pauses output", "ssh.pty_term_mode.vstop",
7015 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7016 | "Normally Control-S", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7017 |
7018 | { &hf_ssh_pty_term_mode_vsusp,
7019 | { "Suspends the current program", "ssh.pty_term_mode.vsusp",
7020 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7021 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7022 |
7023 | { &hf_ssh_pty_term_mode_vdsusp,
7024 | { "Another suspend character", "ssh.pty_term_mode.vdsusp",
7025 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7026 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7027 |
7028 | { &hf_ssh_pty_term_mode_vreprint,
7029 | { "Reprints the current input line", "ssh.pty_term_mode.vreprint",
7030 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7031 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7032 |
7033 | { &hf_ssh_pty_term_mode_vwerase,
7034 | { "Erase a word to the left of the cursor", "ssh.pty_term_mode.vwerase",
7035 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7036 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7037 |
7038 | { &hf_ssh_pty_term_mode_vlnext,
7039 | { "Enter the next character typed literally", "ssh.pty_term_mode.vlnext",
7040 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7041 | "Even if a special character", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7042 |
7043 | { &hf_ssh_pty_term_mode_vflush,
7044 | { "Character to flush output", "ssh.pty_term_mode.vflush",
7045 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7046 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7047 |
7048 | { &hf_ssh_pty_term_mode_vswtch,
7049 | { "Switch to a different shell layer", "ssh.pty_term_mode.vswtch",
7050 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7051 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7052 |
7053 | { &hf_ssh_pty_term_mode_vstatus,
7054 | { "Print system status line", "ssh.pty_term_mode.vstatus",
7055 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7056 | "Load, command, pid, etc.", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
7057 |
7058 | { &hf_ssh_pty_term_mode_vdiscard,
7059 | { "Toggles the flushing of terminal output", "ssh.pty_term_mode.vdiscard",
7060 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7061 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7062 |
7063 | { &hf_ssh_pty_term_mode_ignpar,
7064 | { "Ignore parity flag", "ssh.pty_term_mode.ignpar",
7065 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7066 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7067 |
7068 | { &hf_ssh_pty_term_mode_parmrk,
7069 | { "Mark parity and framing errors", "ssh.pty_term_mode.parmrk",
7070 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7071 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7072 |
7073 | { &hf_ssh_pty_term_mode_inpck,
7074 | { "Enable checking of parity errors", "ssh.pty_term_mode.inpck",
7075 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7076 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7077 |
7078 | { &hf_ssh_pty_term_mode_istrip,
7079 | { "Strip 8th bit off characters", "ssh.pty_term_mode.istrip",
7080 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7081 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7082 |
7083 | { &hf_ssh_pty_term_mode_inlcr,
7084 | { "Map NL into CR on input", "ssh.pty_term_mode.inlcr",
7085 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7086 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7087 |
7088 | { &hf_ssh_pty_term_mode_igncr,
7089 | { "Ignore CR on input", "ssh.pty_term_mode.igncr",
7090 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7091 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7092 |
7093 | { &hf_ssh_pty_term_mode_icrnl,
7094 | { "Map CR to NL on input", "ssh.pty_term_mode.icrnl",
7095 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7096 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7097 |
7098 | { &hf_ssh_pty_term_mode_iuclc,
7099 | { "Translate uppercase characters to lowercase", "ssh.pty_term_mode.iuclc",
7100 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7101 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7102 |
7103 | { &hf_ssh_pty_term_mode_ixon,
7104 | { "Enable output flow control", "ssh.pty_term_mode.ixon",
7105 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7106 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7107 |
7108 | { &hf_ssh_pty_term_mode_ixany,
7109 | { "Any char will restart after stop", "ssh.pty_term_mode.ixany",
7110 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7111 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7112 |
7113 | { &hf_ssh_pty_term_mode_ixoff,
7114 | { "Enable input flow control", "ssh.pty_term_mode.ixoff",
7115 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7116 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7117 |
7118 | { &hf_ssh_pty_term_mode_imaxbel,
7119 | { "Ring bell on input queue full", "ssh.pty_term_mode.imaxbel",
7120 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7121 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7122 |
7123 | { &hf_ssh_pty_term_mode_iutf8,
7124 | { "Terminal input and output is assumed to be encoded in UTF-8", "ssh.pty_term_mode.iutf8",
7125 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7126 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7127 |
7128 | { &hf_ssh_pty_term_mode_isig,
7129 | { "Enable signals INTR, QUIT, [D]SUSP", "ssh.pty_term_mode.isig",
7130 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7131 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7132 |
7133 | { &hf_ssh_pty_term_mode_icanon,
7134 | { "Canonicalize input lines", "ssh.pty_term_mode.icanon",
7135 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7136 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7137 |
7138 | { &hf_ssh_pty_term_mode_xcase,
7139 | { "Enable input and output of uppercase characters by preceding their lowercase equivalents with '\'", "ssh.pty_term_mode.xcase",
7140 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7141 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7142 |
7143 | { &hf_ssh_pty_term_mode_echo,
7144 | { "Enable echoing", "ssh.pty_term_mode.echo",
7145 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7146 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7147 |
7148 | { &hf_ssh_pty_term_mode_echoe,
7149 | { "Visually erase chars", "ssh.pty_term_mode.echoe",
7150 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7151 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7152 |
7153 | { &hf_ssh_pty_term_mode_echok,
7154 | { "Kill character discards current line", "ssh.pty_term_mode.echok",
7155 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7156 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7157 |
7158 | { &hf_ssh_pty_term_mode_echonl,
7159 | { "Echo NL even if ECHO is off", "ssh.pty_term_mode.echonl",
7160 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7161 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7162 |
7163 | { &hf_ssh_pty_term_mode_noflsh,
7164 | { "No flush after interrupt", "ssh.pty_term_mode.noflsh",
7165 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7166 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7167 |
7168 | { &hf_ssh_pty_term_mode_tostop,
7169 | { "Stop background jobs from output", "ssh.pty_term_mode.tostop",
7170 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7171 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7172 |
7173 | { &hf_ssh_pty_term_mode_iexten,
7174 | { "Enable extensions", "ssh.pty_term_mode.iexten",
7175 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7176 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7177 |
7178 | { &hf_ssh_pty_term_mode_echoctl,
7179 | { "Echo control characters as ^(Char)", "ssh.pty_term_mode.echoctl",
7180 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7181 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7182 |
7183 | { &hf_ssh_pty_term_mode_echoke,
7184 | { "Visual erase for line kill", "ssh.pty_term_mode.echoke",
7185 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7186 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7187 |
7188 | { &hf_ssh_pty_term_mode_pendin,
7189 | { "Retype pending input", "ssh.pty_term_mode.pendin",
7190 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7191 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7192 |
7193 | { &hf_ssh_pty_term_mode_opost,
7194 | { "Enable output processing", "ssh.pty_term_mode.opost",
7195 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7196 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7197 |
7198 | { &hf_ssh_pty_term_mode_olcuc,
7199 | { "Convert lowercase to uppercase", "ssh.pty_term_mode.olcuc",
7200 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7201 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7202 |
7203 | { &hf_ssh_pty_term_mode_onlcr,
7204 | { "Map NL to CR-NL", "ssh.pty_term_mode.onlcr",
7205 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7206 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7207 |
7208 | { &hf_ssh_pty_term_mode_ocrnl,
7209 | { "Translate carriage return to newline (output)", "ssh.pty_term_mode.ocrnl",
7210 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7211 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7212 |
7213 | { &hf_ssh_pty_term_mode_onocr,
7214 | { "Translate newline to carriage-return newline (output)", "ssh.pty_term_mode.onocr",
7215 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7216 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7217 |
7218 | { &hf_ssh_pty_term_mode_onlret,
7219 | { "Newline performs a carriage return (output)", "ssh.pty_term_mode.onlret",
7220 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7221 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7222 |
7223 | { &hf_ssh_pty_term_mode_cs7,
7224 | { "7 bit mode", "ssh.pty_term_mode.cs7",
7225 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7226 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7227 |
7228 | { &hf_ssh_pty_term_mode_cs8,
7229 | { "8 bit mode", "ssh.pty_term_mode.cs8",
7230 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7231 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7232 |
7233 | { &hf_ssh_pty_term_mode_parenb,
7234 | { "Parity enable", "ssh.pty_term_mode.parenb",
7235 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7236 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7237 |
7238 | { &hf_ssh_pty_term_mode_parodd,
7239 | { "Odd parity", "ssh.pty_term_mode.parodd",
7240 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7241 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7242 |
7243 | { &hf_ssh_pty_term_mode_ispeed,
7244 | { "Input baud rate", "ssh.pty_term_mode.ispeed",
7245 | FT_UINT32, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_bit_sec)((0 ? (const struct unit_name_string*)0 : ((&units_bit_sec )))), 0x0,
7246 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7247 |
7248 | { &hf_ssh_pty_term_mode_ospeed,
7249 | { "Output baud rate", "ssh.pty_term_mode.ospeed",
7250 | FT_UINT32, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_bit_sec)((0 ? (const struct unit_name_string*)0 : ((&units_bit_sec )))), 0x0,
7251 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7252 |
7253 | { &hf_ssh_pty_term_mode_value,
7254 | { "Value", "ssh.pty_term_mode.value",
7255 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7256 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7257 |
7258 | { &hf_ssh_exit_status,
7259 | { "Exit status", "ssh.exit_status",
7260 | FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
7261 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7262 |
7263 | { &hf_ssh_channel_window_adjust,
7264 | { "Bytes to add", "ssh.channel_window_adjust",
7265 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7266 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7267 |
7268 | { &hf_ssh_channel_data_len,
7269 | { "Data length", "ssh.channel_data_length",
7270 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7271 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7272 |
7273 | { &hf_ssh_channel_data_type_code,
7274 | { "Data Type Code", "ssh.channel_data_type_code",
7275 | FT_UINT32, BASE_DEC, VALS(ssh_channel_data_type_code_vals)((0 ? (const struct _value_string*)0 : ((ssh_channel_data_type_code_vals )))), 0x0,
7276 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7277 |
7278 | { &hf_ssh_reassembled_in,
7279 | { "Reassembled PDU in frame", "ssh.reassembled_in",
7280 | FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7281 | "The PDU that doesn't end in this segment is reassembled in this frame", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7282 |
7283 | { &hf_ssh_reassembled_length,
7284 | { "Reassembled PDU length", "ssh.reassembled.length",
7285 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7286 | "The total length of the reassembled payload", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7287 |
7288 | { &hf_ssh_reassembled_data,
7289 | { "Reassembled PDU data", "ssh.reassembled.data",
7290 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
7291 | "The payload of multiple reassembled SSH segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7292 |
7293 | { &hf_ssh_segments,
7294 | { "Reassembled SSH segments", "ssh.segments",
7295 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
7296 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7297 |
7298 | { &hf_ssh_segment,
7299 | { "SSH segment", "ssh.segment",
7300 | FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7301 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7302 |
7303 | { &hf_ssh_segment_overlap,
7304 | { "Segment overlap", "ssh.segment.overlap",
7305 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7306 | "Segment overlaps with other segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7307 |
7308 | { &hf_ssh_segment_overlap_conflict,
7309 | { "Conflicting data in segment overlap", "ssh.segment.overlap.conflict",
7310 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7311 | "Overlapping segments contained conflicting data", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7312 |
7313 | { &hf_ssh_segment_multiple_tails,
7314 | { "Multiple tail segments found", "ssh.segment.multipletails",
7315 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7316 | "Several tails were found when reassembling the pdu", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7317 |
7318 | { &hf_ssh_segment_too_long_fragment,
7319 | { "Segment too long", "ssh.segment.toolongfragment",
7320 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7321 | "Segment contained data past end of the pdu", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7322 |
7323 | { &hf_ssh_segment_error,
7324 | { "Reassembling error", "ssh.segment.error",
7325 | FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7326 | "Reassembling error due to illegal segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7327 |
7328 | { &hf_ssh_segment_count,
7329 | { "Segment count", "ssh.segment.count",
7330 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7331 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7332 |
7333 | { &hf_ssh_segment_data,
7334 | { "SSH segment data", "ssh.segment.data",
7335 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
7336 | "The payload of a single SSH segment", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7337 |
7338 | { &hf_ssh_hybrid_blob_client,
7339 | { "Hybrid Key Exchange Blob Client", "ssh.kex_hybrid_blob_client",
7340 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, "Client post-quantum hybrid blob", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7341 | },
7342 |
7343 | { &hf_ssh_hybrid_blob_client_len,
7344 | { "Hybrid Key Exchange Blob Client Length", "ssh.kex_hybrid_blob_client_len",
7345 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0, "Length of client post-quantum hybrid blob", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7346 | },
7347 |
7348 | { &hf_ssh_hybrid_blob_server,
7349 | { "Hybrid Key Exchange Blob Server", "ssh.kex_hybrid_blob_server",
7350 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, "Server post-quantum hybrid blob", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7351 | },
7352 |
7353 | { &hf_ssh_hybrid_blob_server_len,
7354 | { "Hybrid Key Exchange Blob Server Length", "ssh.kex_hybrid_blob_server_len",
7355 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0, "Length of server post-quantum hybrid blob", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7356 | },
7357 |
7358 | { &hf_ssh_pq_kem_client,
7359 | { "Client PQ KEM Public Key", "ssh.kex.pq_kem_client",
7360 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
7361 | "Post-quantum key (client)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7362 | },
7363 |
7364 | { &hf_ssh_pq_kem_server,
7365 | { "Server PQ KEM Response", "ssh.kex.pq_kem_server",
7366 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
7367 | "Post-quantum ciphertext (server response)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7368 | },
7369 |
7370 | };
7371 |
7372 | static int *ett[] = {
7373 | &ett_ssh,
7374 | &ett_key_exchange,
7375 | &ett_key_exchange_host_key,
7376 | &ett_key_exchange_host_sig,
7377 | &ett_extension,
7378 | &ett_userauth_pk_blob,
7379 | &ett_userauth_pk_signature,
7380 | &ett_term_modes,
7381 | &ett_term_mode,
7382 | &ett_ssh1,
7383 | &ett_ssh2,
7384 | &ett_key_init,
7385 | &ett_ssh_segments,
7386 | &ett_ssh_pqhybrid_client, // added for PQ hybrid CLIENT dissection
7387 | &ett_ssh_pqhybrid_server, // added for PQ hybrid SERVER dissection
7388 | &ett_ssh_segment
7389 | };
7390 |
7391 | static ei_register_info ei[] = {
7392 | { &ei_ssh_packet_length, { "ssh.packet_length.error", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Invalid packet length", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
7393 | { &ei_ssh_padding_length, { "ssh.padding_length.error", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Invalid padding length", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
7394 | { &ei_ssh_packet_decode, { "ssh.packet_decode.error", PI_UNDECODED0x05000000, PI_WARN0x00600000, "Packet decoded length not equal to packet length", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
7395 | { &ei_ssh_channel_number, { "ssh.channel_number.error", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Could not find channel", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
7396 | { &ei_ssh_invalid_keylen, { "ssh.key_length.error", PI_PROTOCOL0x09000000, PI_ERROR0x00800000, "Invalid key length", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
7397 | { &ei_ssh_mac_bad, { "ssh.mac_bad.expert", PI_CHECKSUM0x01000000, PI_ERROR0x00800000, "Bad MAC", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
7398 | { &ei_ssh2_kex_hybrid_msg_code, { "ssh.kex_hybrid_msg_code", PI_SECURITY0x0a000000, PI_NOTE0x00400000, "Hybrid KEX encountered", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
7399 | { &ei_ssh2_kex_hybrid_msg_code_unknown, { "ssh.kex_hybrid_msg_code.unknown", PI_UNDECODED0x05000000, PI_NOTE0x00400000, "Unknown KEX_HYBRID message code", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
7400 |
7401 | };
7402 | module_t *ssh_module;
7403 | expert_module_t *expert_ssh;
7404 |
7405 | proto_ssh = proto_register_protocol("SSH Protocol", "SSH", "ssh");
7406 | proto_register_field_array(proto_ssh, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));
7407 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
7408 | expert_ssh = expert_register_protocol(proto_ssh);
7409 | expert_register_field_array(expert_ssh, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0]));
7410 |
7411 | #ifdef SSH_DECRYPT_DEBUG
7412 | ssh_module = prefs_register_protocol(proto_ssh, ssh_prefs_apply_cb);
7413 | #else
7414 | ssh_module = prefs_register_protocol(proto_ssh, NULL((void*)0));
7415 | #endif
7416 | prefs_register_bool_preference(ssh_module, "desegment_buffers",
7417 | "Reassemble SSH buffers spanning multiple TCP segments",
7418 | "Whether the SSH dissector should reassemble SSH buffers spanning multiple TCP segments. "
7419 | "To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
7420 | &ssh_desegment);
7421 | prefs_register_bool_preference(ssh_module, "ignore_ssh_mac_failed",
7422 | "Ignore Message Authentication Code (MAC) failure",
7423 | "For troubleshooting purposes, decrypt even if the "
7424 | "Message Authentication Code (MAC) check fails.",
7425 | &ssh_ignore_mac_failed);
7426 |
7427 | ssh_master_key_map = g_hash_table_new_full(ssh_hash, ssh_equal, ssh_free_glib_allocated_bignum, ssh_free_glib_allocated_entry);
7428 | prefs_register_filename_preference(ssh_module, "keylog_file", "Key log filename",
7429 | "The path to the file which contains a list of key exchange secrets in the following format:\n"
7430 | "\"<hex-encoded-cookie> <PRIVATE_KEY|SHARED_SECRET> <hex-encoded-key>\" (without quotes or leading spaces).\n",
7431 | &pref_keylog_file, false0);
7432 |
7433 | prefs_register_filename_preference(ssh_module, "debug_file", "SSH debug file",
7434 | "Redirect SSH debug to the file specified. Leave empty to disable debugging "
7435 | "or use \"" SSH_DEBUG_USE_STDERR"-" "\" to redirect output to stderr.",
7436 | &ssh_debug_file_name, true1);
7437 |
7438 | secrets_register_type(SECRETS_TYPE_SSH0x5353484b, ssh_secrets_block_callback);
7439 |
7440 | ssh_handle = register_dissector("ssh", dissect_ssh, proto_ssh);
7441 | reassembly_table_register(&ssh_reassembly_table, &tcp_reassembly_table_functions);
7442 | register_shutdown_routine(ssh_shutdown);
7443 | }
7444 |
7445 | void
7446 | proto_reg_handoff_ssh(void)
7447 | {
7448 | #ifdef SSH_DECRYPT_DEBUG
7449 | ssh_set_debug(ssh_debug_file_name);
7450 | #endif
7451 | dissector_add_uint_range_with_preference("tcp.port", TCP_RANGE_SSH"22", ssh_handle);
7452 | dissector_add_uint("sctp.port", SCTP_PORT_SSH22, ssh_handle);
7453 | dissector_add_uint("sctp.ppi", SSH_PAYLOAD_PROTOCOL_ID45, ssh_handle);
7454 | sftp_handle = find_dissector_add_dependency("sftp", proto_ssh);
7455 | data_text_lines_handle = find_dissector_add_dependency("data-text-lines", proto_ssh);
7456 |
7457 | heur_dissector_add("tcp", dissect_ssh_heur, "SSH over TCP", "ssh_tcp", proto_ssh, HEURISTIC_ENABLE);
7458 | }
7459 |
7460 | /*
7461 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
7462 | *
7463 | * Local variables:
7464 | * c-basic-offset: 4
7465 | * tab-width: 8
7466 | * indent-tabs-mode: nil
7467 | * End:
7468 | *
7469 | * vi: set shiftwidth=4 tabstop=8 expandtab:
7470 | * :indentSize=4:tabSize=8:noTabs=true:
7471 | */