### Bug Summary

File: | builds/wireshark/wireshark/epan/dissectors/packet-ssh.c
Warning: | line 2632, 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/2026-01-29-100357-3623-1 -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 | /* Start with WIRESHARK_LOG_DOMAINS=packet-ssh and WIRESHARK_LOG_LEVEL=debug to see messages. */
40 | #define WS_LOG_DOMAIN"packet-ssh" "packet-ssh"
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;
324 |
325 | /* Key exchange: Diffie-Hellman */
326 | static int hf_ssh_dh_e;
327 | static int hf_ssh_dh_f;
328 |
329 | /* Key exchange: Diffie-Hellman Group Exchange */
330 | static int hf_ssh_dh_gex_min;
331 | static int hf_ssh_dh_gex_nbits;
332 | static int hf_ssh_dh_gex_max;
333 | static int hf_ssh_dh_gex_p;
334 | static int hf_ssh_dh_gex_g;
335 |
336 | /* Key exchange: Elliptic Curve Diffie-Hellman */
337 | static int hf_ssh_ecdh_q_c;
338 | static int hf_ssh_ecdh_q_c_length;
339 | static int hf_ssh_ecdh_q_s;
340 | static int hf_ssh_ecdh_q_s_length;
341 |
342 | /* Key exchange: Post-Quantum Hybrid KEM */
343 | static int hf_ssh_hybrid_blob_client; // client's full PQ blob
344 | static int hf_ssh_hybrid_blob_client_len;
345 | static int hf_ssh_hybrid_blob_server; // server's full PQ blob
346 | static int hf_ssh_hybrid_blob_server_len;
347 | static int hf_ssh_pq_kem_client; // client's PQ public key
348 | static int hf_ssh_pq_kem_server; // server's PQ response
349 |
350 | /* Extension negotiation */
351 | static int hf_ssh_ext_count;
352 | static int hf_ssh_ext_name_length;
353 | static int hf_ssh_ext_name;
354 | static int hf_ssh_ext_value_length;
355 | static int hf_ssh_ext_value;
356 | static int hf_ssh_ext_server_sig_algs_algorithms;
357 | static int hf_ssh_ext_delay_compression_algorithms_client_to_server_length;
358 | static int hf_ssh_ext_delay_compression_algorithms_client_to_server;
359 | static int hf_ssh_ext_delay_compression_algorithms_server_to_client_length;
360 | static int hf_ssh_ext_delay_compression_algorithms_server_to_client;
361 | static int hf_ssh_ext_no_flow_control_value;
362 | static int hf_ssh_ext_elevation_value;
363 | static int hf_ssh_ext_prop_publickey_algorithms_algorithms;
364 |
365 | /* Miscellaneous */
366 | static int hf_ssh_mpint_length;
367 |
368 | static int hf_ssh_ignore_data_length;
369 | static int hf_ssh_ignore_data;
370 | static int hf_ssh_debug_always_display;
371 | static int hf_ssh_debug_message_length;
372 | static int hf_ssh_debug_message;
373 | static int hf_ssh_service_name_length;
374 | static int hf_ssh_service_name;
375 | static int hf_ssh_userauth_user_name_length;
376 | static int hf_ssh_userauth_user_name;
377 | static int hf_ssh_userauth_change_password;
378 | static int hf_ssh_userauth_service_name_length;
379 | static int hf_ssh_userauth_service_name;
380 | static int hf_ssh_userauth_method_name_length;
381 | static int hf_ssh_userauth_method_name;
382 | static int hf_ssh_userauth_have_signature;
383 | static int hf_ssh_userauth_password_length;
384 | static int hf_ssh_userauth_password;
385 | static int hf_ssh_userauth_new_password_length;
386 | static int hf_ssh_userauth_new_password;
387 | static int hf_ssh_auth_failure_list_length;
388 | static int hf_ssh_auth_failure_list;
389 | static int hf_ssh_userauth_partial_success;
390 | static int hf_ssh_userauth_pka_name_len;
391 | static int hf_ssh_userauth_pka_name;
392 | static int hf_ssh_pk_blob_name_length;
393 | static int hf_ssh_pk_blob_name;
394 | static int hf_ssh_blob_length;
395 | static int hf_ssh_signature_length;
396 | static int hf_ssh_pk_sig_blob_name_length;
397 | static int hf_ssh_pk_sig_blob_name;
398 | static int hf_ssh_connection_type_name_len;
399 | static int hf_ssh_connection_type_name;
400 | static int hf_ssh_connection_sender_channel;
401 | static int hf_ssh_connection_recipient_channel;
402 | static int hf_ssh_connection_initial_window;
403 | static int hf_ssh_connection_maximum_packet_size;
404 | static int hf_ssh_global_request_name_len;
405 | static int hf_ssh_global_request_name;
406 | static int hf_ssh_global_request_want_reply;
407 | static int hf_ssh_global_request_hostkeys_array_len;
408 | static int hf_ssh_channel_request_name_len;
409 | static int hf_ssh_channel_request_name;
410 | static int hf_ssh_channel_request_want_reply;
411 | static int hf_ssh_subsystem_name_len;
412 | static int hf_ssh_subsystem_name;
413 | static int hf_ssh_exec_cmd;
414 | static int hf_ssh_env_name;
415 | static int hf_ssh_env_value;
416 | static int hf_ssh_pty_term;
417 | static int hf_ssh_pty_term_width_char;
418 | static int hf_ssh_pty_term_height_row;
419 | static int hf_ssh_pty_term_width_pixel;
420 | static int hf_ssh_pty_term_height_pixel;
421 | static int hf_ssh_pty_term_modes_len;
422 | static int hf_ssh_pty_term_modes;
423 | static int hf_ssh_pty_term_mode;
424 | static int hf_ssh_pty_term_mode_opcode;
425 | static int hf_ssh_pty_term_mode_vintr;
426 | static int hf_ssh_pty_term_mode_vquit;
427 | static int hf_ssh_pty_term_mode_verase;
428 | static int hf_ssh_pty_term_mode_vkill;
429 | static int hf_ssh_pty_term_mode_veof;
430 | static int hf_ssh_pty_term_mode_veol;
431 | static int hf_ssh_pty_term_mode_veol2;
432 | static int hf_ssh_pty_term_mode_vstart;
433 | static int hf_ssh_pty_term_mode_vstop;
434 | static int hf_ssh_pty_term_mode_vsusp;
435 | static int hf_ssh_pty_term_mode_vdsusp;
436 | static int hf_ssh_pty_term_mode_vreprint;
437 | static int hf_ssh_pty_term_mode_vwerase;
438 | static int hf_ssh_pty_term_mode_vlnext;
439 | static int hf_ssh_pty_term_mode_vflush;
440 | static int hf_ssh_pty_term_mode_vswtch;
441 | static int hf_ssh_pty_term_mode_vstatus;
442 | static int hf_ssh_pty_term_mode_vdiscard;
443 | static int hf_ssh_pty_term_mode_ignpar;
444 | static int hf_ssh_pty_term_mode_parmrk;
445 | static int hf_ssh_pty_term_mode_inpck;
446 | static int hf_ssh_pty_term_mode_istrip;
447 | static int hf_ssh_pty_term_mode_inlcr;
448 | static int hf_ssh_pty_term_mode_igncr;
449 | static int hf_ssh_pty_term_mode_icrnl;
450 | static int hf_ssh_pty_term_mode_iuclc;
451 | static int hf_ssh_pty_term_mode_ixon;
452 | static int hf_ssh_pty_term_mode_ixany;
453 | static int hf_ssh_pty_term_mode_ixoff;
454 | static int hf_ssh_pty_term_mode_imaxbel;
455 | static int hf_ssh_pty_term_mode_iutf8;
456 | static int hf_ssh_pty_term_mode_isig;
457 | static int hf_ssh_pty_term_mode_icanon;
458 | static int hf_ssh_pty_term_mode_xcase;
459 | static int hf_ssh_pty_term_mode_echo;
460 | static int hf_ssh_pty_term_mode_echoe;
461 | static int hf_ssh_pty_term_mode_echok;
462 | static int hf_ssh_pty_term_mode_echonl;
463 | static int hf_ssh_pty_term_mode_noflsh;
464 | static int hf_ssh_pty_term_mode_tostop;
465 | static int hf_ssh_pty_term_mode_iexten;
466 | static int hf_ssh_pty_term_mode_echoctl;
467 | static int hf_ssh_pty_term_mode_echoke;
468 | static int hf_ssh_pty_term_mode_pendin;
469 | static int hf_ssh_pty_term_mode_opost;
470 | static int hf_ssh_pty_term_mode_olcuc;
471 | static int hf_ssh_pty_term_mode_onlcr;
472 | static int hf_ssh_pty_term_mode_ocrnl;
473 | static int hf_ssh_pty_term_mode_onocr;
474 | static int hf_ssh_pty_term_mode_onlret;
475 | static int hf_ssh_pty_term_mode_cs7;
476 | static int hf_ssh_pty_term_mode_cs8;
477 | static int hf_ssh_pty_term_mode_parenb;
478 | static int hf_ssh_pty_term_mode_parodd;
479 | static int hf_ssh_pty_term_mode_ispeed;
480 | static int hf_ssh_pty_term_mode_ospeed;
481 | static int hf_ssh_pty_term_mode_value;
482 | static int hf_ssh_channel_window_adjust;
483 | static int hf_ssh_channel_data_len;
484 | static int hf_ssh_channel_data_type_code;
485 | static int hf_ssh_exit_status;
486 | static int hf_ssh_disconnect_reason;
487 | static int hf_ssh_disconnect_description_length;
488 | static int hf_ssh_disconnect_description;
489 | static int hf_ssh_lang_tag_length;
490 | static int hf_ssh_lang_tag;
491 | static int hf_ssh_ping_data_length;
492 | static int hf_ssh_ping_data;
493 | static int hf_ssh_pong_data_length;
494 | static int hf_ssh_pong_data;
495 |
496 | static int hf_ssh_blob;
497 | static int hf_ssh_blob_e;
498 | static int hf_ssh_blob_n;
499 | static int hf_ssh_blob_dsa_p;
500 | static int hf_ssh_blob_dsa_q;
501 | static int hf_ssh_blob_dsa_g;
502 | static int hf_ssh_blob_dsa_y;
503 | static int hf_ssh_blob_ecdsa_curve_id;
504 | static int hf_ssh_blob_ecdsa_curve_id_length;
505 | static int hf_ssh_blob_ecdsa_q;
506 | static int hf_ssh_blob_ecdsa_q_length;
507 | static int hf_ssh_blob_eddsa_key;
508 | static int hf_ssh_blob_eddsa_key_length;
509 | static int hf_ssh_blob_data;
510 |
511 | static int hf_ssh_pk_sig_s_length;
512 | static int hf_ssh_pk_sig_s;
513 |
514 | static int hf_ssh_reassembled_in;
515 | static int hf_ssh_reassembled_length;
516 | static int hf_ssh_reassembled_data;
517 | static int hf_ssh_segments;
518 | static int hf_ssh_segment;
519 | static int hf_ssh_segment_overlap;
520 | static int hf_ssh_segment_overlap_conflict;
521 | static int hf_ssh_segment_multiple_tails;
522 | static int hf_ssh_segment_too_long_fragment;
523 | static int hf_ssh_segment_error;
524 | static int hf_ssh_segment_count;
525 | static int hf_ssh_segment_data;
526 |
527 | static int ett_ssh;
528 | static int ett_key_exchange;
529 | static int ett_key_exchange_host_key;
530 | static int ett_key_exchange_host_sig;
531 | static int ett_extension;
532 | static int ett_userauth_pk_blob;
533 | static int ett_userauth_pk_signature;
534 | static int ett_term_modes;
535 | static int ett_term_mode;
536 | static int ett_key_init;
537 | static int ett_ssh1;
538 | static int ett_ssh2;
539 | static int ett_ssh_segments;
540 | static int ett_ssh_segment;
541 | static int ett_ssh_pqhybrid_client;
542 | static int ett_ssh_pqhybrid_server;
543 |
544 | static expert_field ei_ssh_packet_length;
545 | static expert_field ei_ssh_padding_length;
546 | static expert_field ei_ssh_packet_decode;
547 | static expert_field ei_ssh_channel_number;
548 | static expert_field ei_ssh_invalid_keylen;
549 | static expert_field ei_ssh_mac_bad;
550 | static expert_field ei_ssh2_kex_hybrid_msg_code;
551 | static expert_field ei_ssh2_kex_hybrid_msg_code_unknown;
552 |
553 | static bool_Bool ssh_desegment = true1;
554 | static bool_Bool ssh_ignore_mac_failed;
555 |
556 | static dissector_handle_t ssh_handle;
557 | static dissector_handle_t sftp_handle;
558 | static dissector_handle_t data_text_lines_handle;
559 |
560 | static const char *pref_keylog_file;
561 | static FILE *ssh_keylog_file;
562 |
563 | static reassembly_table ssh_reassembly_table;
564 |
565 | static const fragment_items ssh_segment_items = {
566 | &ett_ssh_segment,
567 | &ett_ssh_segments,
568 | &hf_ssh_segments,
569 | &hf_ssh_segment,
570 | &hf_ssh_segment_overlap,
571 | &hf_ssh_segment_overlap_conflict,
572 | &hf_ssh_segment_multiple_tails,
573 | &hf_ssh_segment_too_long_fragment,
574 | &hf_ssh_segment_error,
575 | &hf_ssh_segment_count,
576 | &hf_ssh_reassembled_in,
577 | &hf_ssh_reassembled_length,
578 | &hf_ssh_reassembled_data,
579 | "Segments"
580 | };
581 |
582 | #define SSH_DECRYPT_DEBUG
583 |
584 | #ifdef SSH_DECRYPT_DEBUG
585 | static const char *ssh_debug_file_name;
586 | #endif
587 |
588 | #define TCP_RANGE_SSH"22" "22"
589 | #define SCTP_PORT_SSH22 22
590 |
591 | /* Message Numbers (from RFC 4250) (1-255) */
592 |
593 | /* Transport layer protocol: generic (1-19) */
594 | #define SSH_MSG_DISCONNECT1 1
595 | #define SSH_MSG_IGNORE2 2
596 | #define SSH_MSG_UNIMPLEMENTED3 3
597 | #define SSH_MSG_DEBUG4 4
598 | #define SSH_MSG_SERVICE_REQUEST5 5
599 | #define SSH_MSG_SERVICE_ACCEPT6 6
600 | #define SSH_MSG_EXT_INFO7 7
601 | #define SSH_MSG_NEWCOMPRESS8 8
602 |
603 | /* Transport layer protocol: Algorithm negotiation (20-29) */
604 | #define SSH_MSG_KEXINIT20 20
605 | #define SSH_MSG_NEWKEYS21 21
606 |
607 | /* Transport layer: Key exchange method specific (reusable) (30-49) */
608 | #define SSH_MSG_KEXDH_INIT30 30
609 | #define SSH_MSG_KEXDH_REPLY31 31
610 |
611 | #define SSH_MSG_KEX_DH_GEX_REQUEST_OLD30 30
612 | #define SSH_MSG_KEX_DH_GEX_GROUP31 31
613 | #define SSH_MSG_KEX_DH_GEX_INIT32 32
614 | #define SSH_MSG_KEX_DH_GEX_REPLY33 33
615 | #define SSH_MSG_KEX_DH_GEX_REQUEST34 34
616 |
617 | #define SSH_MSG_KEX_ECDH_INIT30 30
618 | #define SSH_MSG_KEX_ECDH_REPLY31 31
619 |
620 | #define SSH_MSG_KEX_HYBRID_INIT30 30
621 | #define SSH_MSG_KEX_HYBRID_REPLY31 31
622 |
623 | /* User authentication protocol: generic (50-59) */
624 | #define SSH_MSG_USERAUTH_REQUEST50 50
625 | #define SSH_MSG_USERAUTH_FAILURE51 51
626 | #define SSH_MSG_USERAUTH_SUCCESS52 52
627 | #define SSH_MSG_USERAUTH_BANNER53 53
628 |
629 | /* User authentication protocol: method specific (reusable) (50-79) */
630 | #define SSH_MSG_USERAUTH_PK_OK60 60
631 |
632 | /* Connection protocol: generic (80-89) */
633 | #define SSH_MSG_GLOBAL_REQUEST80 80
634 | #define SSH_MSG_REQUEST_SUCCESS81 81
635 | #define SSH_MSG_REQUEST_FAILURE82 82
636 |
637 | /* Connection protocol: channel related messages (90-127) */
638 | #define SSH_MSG_CHANNEL_OPEN90 90
639 | #define SSH_MSG_CHANNEL_OPEN_CONFIRMATION91 91
640 | #define SSH_MSG_CHANNEL_OPEN_FAILURE92 92
641 | #define SSH_MSG_CHANNEL_WINDOW_ADJUST93 93
642 | #define SSH_MSG_CHANNEL_DATA94 94
643 | #define SSH_MSG_CHANNEL_EXTENDED_DATA95 95
644 | #define SSH_MSG_CHANNEL_EOF96 96
645 | #define SSH_MSG_CHANNEL_CLOSE97 97
646 | #define SSH_MSG_CHANNEL_REQUEST98 98
647 | #define SSH_MSG_CHANNEL_SUCCESS99 99
648 | #define SSH_MSG_CHANNEL_FAILURE100 100
649 |
650 | /* 128-191 reserved for client protocols */
651 | /* 192-255 local extensions */
652 | #define SSH_MSG_PING192 192
653 | #define SSH_MSG_PONG193 193
654 |
655 | #define CIPHER_AES128_CTR0x00010001 0x00010001
656 | #define CIPHER_AES192_CTR0x00010003 0x00010003
657 | #define CIPHER_AES256_CTR0x00010004 0x00010004
658 | #define CIPHER_AES128_CBC0x00020001 0x00020001
659 | #define CIPHER_AES192_CBC0x00020002 0x00020002
660 | #define CIPHER_AES256_CBC0x00020004 0x00020004
661 | #define CIPHER_AES128_GCM0x00040001 0x00040001
662 | //#define CIPHER_AES192_GCM 0x00040002 -- does not exist
663 | #define CIPHER_AES256_GCM0x00040004 0x00040004
664 | // DO NOT USE 0x00040000 (used by SSH_KEX_SNTRUP761X25519)
665 | #define CIPHER_NULL0x00080000 0x00080000
666 |
667 | #define CIPHER_MAC_SHA2_2560x00020001 0x00020001
668 |
669 | #define SSH_EXTENDED_DATA_STDERR1 1
670 |
671 | #define SSH_TTY_OP_END0 0
672 | #define SSH_TTY_OP_VINTR1 1
673 | #define SSH_TTY_OP_VQUIT2 2
674 | #define SSH_TTY_OP_VERASE3 3
675 | #define SSH_TTY_OP_VKILL4 4
676 | #define SSH_TTY_OP_VEOF5 5
677 | #define SSH_TTY_OP_VEOL6 6
678 | #define SSH_TTY_OP_VEOL27 7
679 | #define SSH_TTY_OP_VSTART8 8
680 | #define SSH_TTY_OP_VSTOP9 9
681 | #define SSH_TTY_OP_VSUSP10 10
682 | #define SSH_TTY_OP_VDSUSP11 11
683 | #define SSH_TTY_OP_VREPRINT12 12
684 | #define SSH_TTY_OP_VWERASE13 13
685 | #define SSH_TTY_OP_VLNEXT14 14
686 | #define SSH_TTY_OP_VFLUSH15 15
687 | #define SSH_TTY_OP_VSWTCH16 16
688 | #define SSH_TTY_OP_VSTATUS17 17
689 | #define SSH_TTY_OP_VDISCARD18 18
690 | #define SSH_TTY_OP_IGNPAR30 30
691 | #define SSH_TTY_OP_PARMRK31 31
692 | #define SSH_TTY_OP_INPCK32 32
693 | #define SSH_TTY_OP_ISTRIP33 33
694 | #define SSH_TTY_OP_INLCR34 34
695 | #define SSH_TTY_OP_IGNCR35 35
696 | #define SSH_TTY_OP_ICRNL36 36
697 | #define SSH_TTY_OP_IUCLC37 37
698 | #define SSH_TTY_OP_IXON38 38
699 | #define SSH_TTY_OP_IXANY39 39
700 | #define SSH_TTY_OP_IXOFF40 40
701 | #define SSH_TTY_OP_IMAXBEL41 41
702 | #define SSH_TTY_OP_IUTF842 42
703 | #define SSH_TTY_OP_ISIG50 50
704 | #define SSH_TTY_OP_ICANON51 51
705 | #define SSH_TTY_OP_XCASE52 52
706 | #define SSH_TTY_OP_ECHO53 53
707 | #define SSH_TTY_OP_ECHOE54 54
708 | #define SSH_TTY_OP_ECHOK55 55
709 | #define SSH_TTY_OP_ECHONL56 56
710 | #define SSH_TTY_OP_NOFLSH57 57
711 | #define SSH_TTY_OP_TOSTOP58 58
712 | #define SSH_TTY_OP_IEXTEN59 59
713 | #define SSH_TTY_OP_ECHOCTL60 60
714 | #define SSH_TTY_OP_ECHOKE61 61
715 | #define SSH_TTY_OP_PENDIN62 62
716 | #define SSH_TTY_OP_OPOST70 70
717 | #define SSH_TTY_OP_OLCUC71 71
718 | #define SSH_TTY_OP_ONLCR72 72
719 | #define SSH_TTY_OP_OCRNL73 73
720 | #define SSH_TTY_OP_ONOCR74 74
721 | #define SSH_TTY_OP_ONLRET75 75
722 | #define SSH_TTY_OP_CS790 90
723 | #define SSH_TTY_OP_CS891 91
724 | #define SSH_TTY_OP_PARENB92 92
725 | #define SSH_TTY_OP_PARODD93 93
726 | #define SSH_TTY_OP_ISPEED128 128
727 | #define SSH_TTY_OP_OSPEED129 129
728 |
729 | static const value_string ssh2_msg_vals[] = {
730 | { SSH_MSG_DISCONNECT1, "Disconnect" },
731 | { SSH_MSG_IGNORE2, "Ignore" },
732 | { SSH_MSG_UNIMPLEMENTED3, "Unimplemented" },
733 | { SSH_MSG_DEBUG4, "Debug" },
734 | { SSH_MSG_SERVICE_REQUEST5, "Service Request" },
735 | { SSH_MSG_SERVICE_ACCEPT6, "Service Accept" },
736 | { SSH_MSG_EXT_INFO7, "Extension Information" },
737 | { SSH_MSG_NEWCOMPRESS8, "New Compression" },
738 | { SSH_MSG_KEXINIT20, "Key Exchange Init" },
739 | { SSH_MSG_NEWKEYS21, "New Keys" },
740 | { SSH_MSG_USERAUTH_REQUEST50, "User Authentication Request" },
741 | { SSH_MSG_USERAUTH_FAILURE51, "User Authentication Failure" },
742 | { SSH_MSG_USERAUTH_SUCCESS52, "User Authentication Success" },
743 | { SSH_MSG_USERAUTH_BANNER53, "User Authentication Banner" },
744 | { SSH_MSG_GLOBAL_REQUEST80, "Global Request" },
745 | { SSH_MSG_REQUEST_SUCCESS81, "Request Success" },
746 | { SSH_MSG_REQUEST_FAILURE82, "Request Failure" },
747 | { SSH_MSG_CHANNEL_OPEN90, "Channel Open" },
748 | { SSH_MSG_CHANNEL_OPEN_CONFIRMATION91, "Channel Open Confirmation" },
749 | { SSH_MSG_CHANNEL_OPEN_FAILURE92, "Channel Open Failure" },
750 | { SSH_MSG_CHANNEL_WINDOW_ADJUST93, "Window Adjust" },
751 | { SSH_MSG_CHANNEL_DATA94, "Channel Data" },
752 | { SSH_MSG_CHANNEL_EXTENDED_DATA95, "Channel Extended Data" },
753 | { SSH_MSG_CHANNEL_EOF96, "Channel EOF" },
754 | { SSH_MSG_CHANNEL_CLOSE97, "Channel Close" },
755 | { SSH_MSG_CHANNEL_REQUEST98, "Channel Request" },
756 | { SSH_MSG_CHANNEL_SUCCESS99, "Channel Success" },
757 | { SSH_MSG_CHANNEL_FAILURE100, "Channel Failure" },
758 | { SSH_MSG_USERAUTH_PK_OK60, "Public Key algorithm accepted" },
759 | { 0, NULL((void*)0) }
760 | };
761 |
762 | static const value_string ssh2_kex_dh_msg_vals[] = {
763 | { SSH_MSG_KEXDH_INIT30, "Diffie-Hellman Key Exchange Init" },
764 | { SSH_MSG_KEXDH_REPLY31, "Diffie-Hellman Key Exchange Reply" },
765 | { 0, NULL((void*)0) }
766 | };
767 |
768 | static const value_string ssh2_kex_dh_gex_msg_vals[] = {
769 | { SSH_MSG_KEX_DH_GEX_REQUEST_OLD30, "Diffie-Hellman Group Exchange Request (Old)" },
770 | { SSH_MSG_KEX_DH_GEX_GROUP31, "Diffie-Hellman Group Exchange Group" },
771 | { SSH_MSG_KEX_DH_GEX_INIT32, "Diffie-Hellman Group Exchange Init" },
772 | { SSH_MSG_KEX_DH_GEX_REPLY33, "Diffie-Hellman Group Exchange Reply" },
773 | { SSH_MSG_KEX_DH_GEX_REQUEST34, "Diffie-Hellman Group Exchange Request" },
774 | { 0, NULL((void*)0) }
775 | };
776 |
777 | static const value_string ssh2_kex_ecdh_msg_vals[] = {
778 | { SSH_MSG_KEX_ECDH_INIT30, "Elliptic Curve Diffie-Hellman Key Exchange Init" },
779 | { SSH_MSG_KEX_ECDH_REPLY31, "Elliptic Curve Diffie-Hellman Key Exchange Reply" },
780 | { 0, NULL((void*)0) }
781 | };
782 |
783 | static const value_string ssh2_kex_hybrid_msg_vals[] = {
784 | { SSH_MSG_KEX_HYBRID_INIT30, "PQ/T Hybrid Key Exchange Init" },
785 | { SSH_MSG_KEX_HYBRID_REPLY31, "PQ/T Hybrid Key Exchange Reply" },
786 | { 0, NULL((void*)0) }
787 | };
788 |
789 | static const value_string ssh2_ext_ping_msg_vals[] = {
790 | { SSH_MSG_PING192, "Ping" },
791 | { SSH_MSG_PONG193, "Pong" },
792 | { 0, NULL((void*)0) }
793 | };
794 |
795 | static const value_string ssh1_msg_vals[] = {
796 | {SSH1_MSG_NONE0, "No Message"},
797 | {SSH1_MSG_DISCONNECT1, "Disconnect"},
798 | {SSH1_SMSG_PUBLIC_KEY2, "Public Key"},
799 | {SSH1_CMSG_SESSION_KEY3, "Session Key"},
800 | {SSH1_CMSG_USER4, "User"},
801 | {0, NULL((void*)0)}
802 | };
803 |
804 | static const value_string ssh_channel_data_type_code_vals[] = {
805 | { SSH_EXTENDED_DATA_STDERR1, "Standard Error" },
806 | { 0, NULL((void*)0) }
807 | };
808 |
809 | static const value_string ssh_tty_op_vals[] = {
810 | { SSH_TTY_OP_END0, "TTY_OP_END" }, // [RFC4250]
811 | { SSH_TTY_OP_VINTR1, "VINTR" }, // [RFC4254],Section 8
812 | { SSH_TTY_OP_VQUIT2, "VQUIT" }, // [RFC4254],Section 8
813 | { SSH_TTY_OP_VERASE3, "VERASE" }, // [RFC4254],Section 8
814 | { SSH_TTY_OP_VKILL4, "VKILL" }, // [RFC4254], Section 8
815 | { SSH_TTY_OP_VEOF5, "VEOF" }, // [RFC4254],Section 8
816 | { SSH_TTY_OP_VEOL6, "VEOL" }, // [RFC4254],Section 8
817 | { SSH_TTY_OP_VEOL27, "VEOL2" }, // [RFC4254], Section 8
818 | { SSH_TTY_OP_VSTART8, "VSTART" }, // [RFC4254],Section 8
819 | { SSH_TTY_OP_VSTOP9, "VSTOP" }, // [RFC4254], Section 8
820 | { SSH_TTY_OP_VSUSP10, "VSUSP" }, // [RFC4254], Section 8
821 | { SSH_TTY_OP_VDSUSP11, "VDSUSP" }, // [RFC4254], Section 8
822 | { SSH_TTY_OP_VREPRINT12, "VREPRINT" }, // [RFC4254], Section 8
823 | { SSH_TTY_OP_VWERASE13, "VWERASE" }, // [RFC4254], Section 8
824 | { SSH_TTY_OP_VLNEXT14, "VLNEXT" }, // [RFC4254],Section 8
825 | { SSH_TTY_OP_VFLUSH15, "VFLUSH" }, // [RFC4254], Section 8
826 | { SSH_TTY_OP_VSWTCH16, "VSWTCH" }, // [RFC4254], Section 8
827 | { SSH_TTY_OP_VSTATUS17, "VSTATUS" }, // [RFC4254],Section 8
828 | { SSH_TTY_OP_VDISCARD18, "VDISCARD" }, // [RFC4254], Section 8
829 | { SSH_TTY_OP_IGNPAR30, "IGNPAR" }, // [RFC4254],Section 8
830 | { SSH_TTY_OP_PARMRK31, "PARMRK" }, // [RFC4254], Section 8
831 | { SSH_TTY_OP_INPCK32, "INPCK" }, // [RFC4254], Section 8
832 | { SSH_TTY_OP_ISTRIP33, "ISTRIP" }, // [RFC4254], Section 8
833 | { SSH_TTY_OP_INLCR34, "INLCR" }, // [RFC4254], Section 8
834 | { SSH_TTY_OP_IGNCR35, "IGNCR" }, // [RFC4254], Section 8
835 | { SSH_TTY_OP_ICRNL36, "ICRNL" }, // [RFC4254], Section 8
836 | { SSH_TTY_OP_IUCLC37, "IUCLC" }, // [RFC4254],Section 8
837 | { SSH_TTY_OP_IXON38, "IXON" }, // [RFC4254], Section 8
838 | { SSH_TTY_OP_IXANY39, "IXANY" }, // [RFC4254], Section 8
839 | { SSH_TTY_OP_IXOFF40, "IXOFF" }, // [RFC4254], Section 8
840 | { SSH_TTY_OP_IMAXBEL41, "IMAXBEL" }, // [RFC4254], Section 8
841 | { SSH_TTY_OP_IUTF842, "IUTF8" }, // [RFC8160],
842 | { SSH_TTY_OP_ISIG50, "ISIG" }, // [RFC4254], Section 8
843 | { SSH_TTY_OP_ICANON51, "ICANON" }, // [RFC4254], Section 8
844 | { SSH_TTY_OP_XCASE52, "XCASE" }, // [RFC4254],Section 8
845 | { SSH_TTY_OP_ECHO53, "ECHO" }, // [RFC4254], Section 8
846 | { SSH_TTY_OP_ECHOE54, "ECHOE" }, // [RFC4254], Section 8
847 | { SSH_TTY_OP_ECHOK55, "ECHOK" }, // [RFC4254], Section 8
848 | { SSH_TTY_OP_ECHONL56, "ECHONL" }, // [RFC4254], Section 8
849 | { SSH_TTY_OP_NOFLSH57, "NOFLSH" }, // [RFC4254],Section 8
850 | { SSH_TTY_OP_TOSTOP58, "TOSTOP" }, // [RFC4254], Section 8
851 | { SSH_TTY_OP_IEXTEN59, "IEXTEN" }, // [RFC4254], Section 8
852 | { SSH_TTY_OP_ECHOCTL60, "ECHOCTL" }, // [RFC4254], Section 8
853 | { SSH_TTY_OP_ECHOKE61, "ECHOKE" }, // [RFC4254], Section 8
854 | { SSH_TTY_OP_PENDIN62, "PENDIN" }, // [RFC4254], Section 8
855 | { SSH_TTY_OP_OPOST70, "OPOST" }, // [RFC4254], Section 8
856 | { SSH_TTY_OP_OLCUC71, "OLCUC" }, // [RFC4254], Section 8
857 | { SSH_TTY_OP_ONLCR72, "ONLCR" }, // [RFC4254], Section 8
858 | { SSH_TTY_OP_OCRNL73, "OCRNL" }, // [RFC4254],Section 8
859 | { SSH_TTY_OP_ONOCR74, "ONOCR" }, // [RFC4254],Section 8
860 | { SSH_TTY_OP_ONLRET75, "ONLRET" }, // [RFC4254],Section 8
861 | { SSH_TTY_OP_CS790, "CS7" }, // [RFC4254], Section 8
862 | { SSH_TTY_OP_CS891, "CS8" }, // [RFC4254], Section 8
863 | { SSH_TTY_OP_PARENB92, "PARENB" }, // [RFC4254], Section 8
864 | { SSH_TTY_OP_PARODD93, "PARODD" }, // [RFC4254], Section 8
865 | { SSH_TTY_OP_ISPEED128, "TTY_OP_ISPEED" }, // [RFC4254],Section 8
866 | { SSH_TTY_OP_OSPEED129, "TTY_OP_OSPEED" }, // [RFC4254],Section 8
867 | { 0, NULL((void*)0) }
868 | };
869 |
870 | static int ssh_dissect_key_init(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree,
871 | int is_response,
872 | struct ssh_flow_data *global_data);
873 | static int ssh_dissect_proposal(tvbuff_t *tvb, int offset, proto_tree *tree,
874 | int hf_index_length, int hf_index_value, char **store);
875 | static int ssh_dissect_ssh1(tvbuff_t *tvb, packet_info *pinfo,
876 | struct ssh_flow_data *global_data,
877 | int offset, proto_tree *tree, int is_response,
878 | bool_Bool *need_desegmentation);
879 | static int ssh_dissect_ssh2(tvbuff_t *tvb, packet_info *pinfo,
880 | struct ssh_flow_data *global_data,
881 | int offset, proto_tree *tree, int is_response,
882 | bool_Bool *need_desegmentation);
883 | static int ssh_dissect_key_exchange(tvbuff_t *tvb, packet_info *pinfo,
884 | struct ssh_flow_data *global_data,
885 | int offset, proto_tree *tree, int is_response,
886 | bool_Bool *need_desegmentation);
887 | static int ssh_dissect_kex_dh(uint8_t msg_code, tvbuff_t *tvb,
888 | packet_info *pinfo, int offset, proto_tree *tree,
889 | struct ssh_flow_data *global_data);
890 | static int ssh_dissect_kex_dh_gex(uint8_t msg_code, tvbuff_t *tvb,
891 | packet_info *pinfo, int offset, proto_tree *tree,
892 | struct ssh_flow_data *global_data);
893 | static int ssh_dissect_kex_ecdh(uint8_t msg_code, tvbuff_t *tvb,
894 | packet_info *pinfo, int offset, proto_tree *tree,
895 | struct ssh_flow_data *global_data);
896 | static int ssh_dissect_kex_hybrid(uint8_t msg_code, tvbuff_t *tvb,
897 | packet_info *pinfo, int offset, proto_tree *tree,
898 | struct ssh_flow_data *global_data);
899 | static int ssh_dissect_kex_pq_hybrid(uint8_t msg_code, tvbuff_t *tvb,
900 | packet_info *pinfo, int offset, proto_tree *tree,
901 | struct ssh_flow_data *global_data);
902 | static int // add support of client PQ hybrid key (e)
903 | ssh_read_e_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data);
904 | static int // add support of server PQ hybrid key (f)
905 | ssh_read_f_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data);
906 | static int ssh_dissect_protocol(tvbuff_t *tvb, packet_info *pinfo,
907 | struct ssh_flow_data *global_data,
908 | unsigned offset, proto_tree *tree, int is_response, unsigned *version,
909 | bool_Bool *need_desegmentation);
910 | static int ssh_try_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
911 | struct ssh_peer_data *peer_data, int offset, proto_tree *tree);
912 | static int ssh_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
913 | struct ssh_peer_data *peer_data,
914 | int offset, proto_tree *tree);
915 | static bool_Bool ssh_choose_algo(char *client, char *server, char **result);
916 | static void ssh_set_mac_length(struct ssh_peer_data *peer_data);
917 | static void ssh_set_kex_specific_dissector(struct ssh_flow_data *global_data);
918 |
919 | static void ssh_keylog_read_file(void);
920 | static void ssh_keylog_process_line(const char *line);
921 | static void ssh_keylog_process_lines(const uint8_t *data, unsigned datalen);
922 | static void ssh_keylog_reset(void);
923 | static ssh_bignum *ssh_kex_make_bignum(const uint8_t *data, unsigned length);
924 | static bool_Bool ssh_read_e(tvbuff_t *tvb, int offset,
925 | struct ssh_flow_data *global_data);
926 | static bool_Bool ssh_read_f(tvbuff_t *tvb, int offset,
927 | struct ssh_flow_data *global_data);
928 | static ssh_bignum * ssh_read_mpint(tvbuff_t *tvb, int offset);
929 | static void ssh_keylog_hash_write_secret(struct ssh_flow_data *global_data, wmem_allocator_t* tmp_allocator);
930 | static ssh_bignum *ssh_kex_shared_secret(int kex_type, ssh_bignum *pub, ssh_bignum *priv, ssh_bignum *modulo);
931 | static void ssh_hash_buffer_put_string(wmem_array_t *buffer, const uint8_t *string,
932 | unsigned len);
933 | static void ssh_hash_buffer_put_uint32(wmem_array_t *buffer, unsigned val);
934 | static char *ssh_string(wmem_allocator_t* allocator, const uint8_t *string, unsigned len);
935 | static void ssh_derive_symmetric_keys(ssh_bignum *shared_secret,
936 | uint8_t *exchange_hash, unsigned hash_length,
937 | struct ssh_flow_data *global_data);
938 | static void ssh_derive_symmetric_key(ssh_bignum *shared_secret,
939 | const uint8_t *exchange_hash, unsigned hash_length, char id,
940 | ssh_bignum *result_key, struct ssh_flow_data *global_data, unsigned we_need);
941 |
942 | static void ssh_choose_enc_mac(struct ssh_flow_data *global_data);
943 | static void ssh_decryption_set_cipher_id(struct ssh_peer_data *peer);
944 | static void ssh_decryption_setup_cipher(struct ssh_peer_data *peer,
945 | ssh_bignum *iv, ssh_bignum *key);
946 | static void ssh_decryption_set_mac_id(struct ssh_peer_data *peer);
947 | static void ssh_decryption_setup_mac(struct ssh_peer_data *peer,
948 | ssh_bignum *iv);
949 | static ssh_packet_info_t* ssh_get_packet_info(packet_info *pinfo, bool_Bool is_response);
950 | static ssh_message_info_t* ssh_get_message(packet_info *pinfo, int record_id);
951 | static unsigned ssh_decrypt_packet(tvbuff_t *tvb, packet_info *pinfo,
952 | struct ssh_peer_data *peer_data, int offset);
953 | static bool_Bool ssh_decrypt_chacha20(gcry_cipher_hd_t hd, uint32_t seqnr,
954 | uint32_t counter, const unsigned char *ctext, unsigned ctext_len,
955 | unsigned char *plain, unsigned plain_len);
956 | static int ssh_dissect_decrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
957 | struct ssh_peer_data *peer_data, proto_tree *tree,
958 | ssh_message_info_t *message);
959 | static int ssh_dissect_transport_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
960 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code);
961 | static int ssh_dissect_rfc8308_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
962 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree);
963 | static int ssh_dissect_userauth_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
964 | int offset, proto_item *msg_type_tree, unsigned msg_code);
965 | static int ssh_dissect_userauth_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
966 | int offset, proto_item *msg_type_tree, unsigned msg_code);
967 | static int ssh_dissect_connection_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
968 | struct ssh_peer_data *peer_data, int offset, proto_item *msg_type_tree,
969 | unsigned msg_code, ssh_message_info_t *message);
970 | static int ssh_dissect_connection_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
971 | int offset, proto_item *msg_type_tree, unsigned msg_code);
972 | static int ssh_dissect_local_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
973 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code);
974 | static int ssh_dissect_public_key_blob(tvbuff_t *tvb, packet_info *pinfo,
975 | proto_item *msg_type_tree);
976 | static int ssh_dissect_public_key_signature(tvbuff_t *packet_tvb, packet_info *pinfo,
977 | int offset, proto_item *msg_type_tree);
978 |
979 | static void create_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, uint32_t sender_channel);
980 | static ssh_channel_info_t* get_channel_info_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel);
981 | static void set_subdissector_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, const char* subsystem_name);
982 |
983 | #define SSH_DEBUG_USE_STDERR"-" "-"
984 |
985 | #ifdef SSH_DECRYPT_DEBUG
986 | static void
987 | ssh_debug_printf(const char* fmt,...) G_GNUC_PRINTF(1,2)__attribute__((__format__ (__printf__, 1, 2)));
988 | static void
989 | ssh_print_data(const char* name, const unsigned char* data, size_t len);
990 | static void
991 | ssh_set_debug(const char* name);
992 | static void
993 | ssh_debug_flush(void);
994 | #else
995 |
996 | /* No debug: nullify debug operation*/
997 | static inline void G_GNUC_PRINTF(1,2)__attribute__((__format__ (__printf__, 1, 2)))
998 | ssh_debug_printf(const char* fmt _U___attribute__((unused)),...)
999 | {
1000 | }
1001 | #define ssh_print_data(a, b, c)
1002 | #define ssh_print_string(a, b)
1003 | #define ssh_set_debug(name)
1004 | #define ssh_debug_flush()
1005 |
1006 | #endif /* SSH_DECRYPT_DEBUG */
1007 |
1008 | static void
1009 | ssh_set_server(struct ssh_flow_data *global_data, address *addr, uint32_t port)
1010 | {
1011 | copy_address_wmem(wmem_file_scope(), &global_data->srv_addr, addr);
1012 | global_data->srv_port = port;
1013 | }
1014 |
1015 | static bool_Bool
1016 | ssh_packet_from_server(struct ssh_flow_data *session, const packet_info *pinfo)
1017 | {
1018 | bool_Bool ret;
1019 | if (session && session->srv_addr.type != AT_NONE) {
1020 | ret = (session->srv_port == pinfo->srcport) &&
1021 | addresses_equal(&session->srv_addr, &pinfo->src);
1022 | } else {
1023 | ret = (pinfo->match_uint == pinfo->srcport);
1024 | }
1025 |
1026 | ssh_debug_printf("packet_from_server: is from server - %s\n", (ret)?"TRUE":"FALSE");
1027 | return ret;
1028 | }
1029 |
1030 | static bool_Bool
1031 | ssh_peer_data_from_server(struct ssh_peer_data* peer_data) {
1032 | return &peer_data->global_data->peer_data[SERVER_PEER_DATA1] == peer_data;
1033 | }
1034 |
1035 | static int
1036 | dissect_ssh(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
1037 | {
1038 | proto_tree *ssh_tree;
1039 | proto_item *ti;
1040 | conversation_t *conversation;
1041 | int last_offset, offset = 0;
1042 |
1043 | bool_Bool is_response,
1044 | need_desegmentation;
1045 | unsigned version;
1046 |
1047 | struct ssh_flow_data *global_data = NULL((void*)0);
1048 | struct ssh_peer_data *peer_data;
1049 |
1050 | ssh_debug_printf("\ndissect_ssh enter frame #%u (%s)\n", pinfo->num, (pinfo->fd->visited)?"already visited":"first time");
1051 |
1052 | conversation = find_or_create_conversation(pinfo);
1053 |
1054 | global_data = (struct ssh_flow_data *)conversation_get_proto_data(conversation, proto_ssh);
1055 | if (!global_data) {
1056 | 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)));
1057 | global_data->version = SSH_VERSION_UNKNOWN0;
1058 | global_data->kex_specific_dissector = ssh_dissect_kex_dh;
1059 | global_data->peer_data[CLIENT_PEER_DATA0].mac_length = -1;
1060 | global_data->peer_data[SERVER_PEER_DATA1].mac_length = -1;
1061 | global_data->peer_data[CLIENT_PEER_DATA0].sequence_number = 0;
1062 | global_data->peer_data[SERVER_PEER_DATA1].sequence_number = 0;
1063 | global_data->peer_data[CLIENT_PEER_DATA0].bn_cookie = NULL((void*)0);
1064 | global_data->peer_data[SERVER_PEER_DATA1].bn_cookie = NULL((void*)0);
1065 | global_data->peer_data[CLIENT_PEER_DATA0].global_data = global_data;
1066 | global_data->peer_data[SERVER_PEER_DATA1].global_data = global_data;
1067 | global_data->kex_client_version = wmem_array_new(wmem_file_scope(), 1);
1068 | global_data->kex_server_version = wmem_array_new(wmem_file_scope(), 1);
1069 | global_data->kex_client_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
1070 | global_data->kex_server_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
1071 | global_data->kex_server_host_key_blob = wmem_array_new(wmem_file_scope(), 1);
1072 | global_data->kex_gex_bits_min = wmem_array_new(wmem_file_scope(), 1);
1073 | global_data->kex_gex_bits_req = wmem_array_new(wmem_file_scope(), 1);
1074 | global_data->kex_gex_bits_max = wmem_array_new(wmem_file_scope(), 1);
1075 | global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
1076 | global_data->do_decrypt = true1;
1077 | global_data->ext_ping_openssh_offered = false0;
1078 |
1079 | /* We expect to get the client message first. If this is from an
1080 | * an assigned server port, call it the server, otherwise call it
1081 | * the client.
1082 | * XXX - We don't unambiguously know which side is the server and
1083 | * which the client until the KEX specific _INIT and _REPLY messages;
1084 | * we ought to be able to handle the cases where the version string or
1085 | * KEXINIT messages are out of order or where the client version string
1086 | * is missing. */
1087 | if (pinfo->match_uint == pinfo->srcport) {
1088 | ssh_set_server(global_data, &pinfo->src, pinfo->srcport);
1089 | } else {
1090 | ssh_set_server(global_data, &pinfo->dst, pinfo->destport);
1091 | }
1092 |
1093 | conversation_add_proto_data(conversation, proto_ssh, global_data);
1094 | }
1095 |
1096 | is_response = ssh_packet_from_server(global_data, pinfo);
1097 | peer_data = &global_data->peer_data[is_response];
1098 |
1099 | ti = proto_tree_add_item(tree, proto_ssh, tvb, offset, -1, ENC_NA0x00000000);
1100 | ssh_tree = proto_item_add_subtree(ti, ett_ssh);
1101 |
1102 | version = global_data->version;
1103 |
1104 | switch(version) {
1105 | case SSH_VERSION_UNKNOWN0:
1106 | col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSH");
1107 | break;
1108 | case SSH_VERSION_11:
1109 | col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSHv1");
1110 | break;
1111 | case SSH_VERSION_22:
1112 | col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSHv2");
1113 | break;
1114 |
1115 | }
1116 |
1117 | col_clear(pinfo->cinfo, COL_INFO);
1118 |
1119 | while(tvb_reported_length_remaining(tvb, offset)> 0) {
1120 | bool_Bool after_version_start = (peer_data->frame_version_start == 0 ||
1121 | pinfo->num >= peer_data->frame_version_start);
1122 | bool_Bool before_version_end = (peer_data->frame_version_end == 0 ||
1123 | pinfo->num <= peer_data->frame_version_end);
1124 |
1125 | need_desegmentation = false0;
1126 | last_offset = offset;
1127 |
1128 | peer_data->counter++;
1129 |
1130 | if (after_version_start && before_version_end &&
1131 | (tvb_strncaseeql(tvb, offset, "SSH-", 4) == 0)) {
1132 | if (peer_data->frame_version_start == 0)
1133 | peer_data->frame_version_start = pinfo->num;
1134 |
1135 | offset = ssh_dissect_protocol(tvb, pinfo,
1136 | global_data,
1137 | offset, ssh_tree, is_response,
1138 | &version, &need_desegmentation);
1139 |
1140 | if (!need_desegmentation) {
1141 | peer_data->frame_version_end = pinfo->num;
1142 | global_data->version = version;
1143 | }
1144 | } else {
1145 | switch(version) {
1146 |
1147 | case SSH_VERSION_UNKNOWN0:
1148 | offset = ssh_try_dissect_encrypted_packet(tvb, pinfo,
1149 | &global_data->peer_data[is_response], offset, ssh_tree);
1150 | break;
1151 |
1152 | case SSH_VERSION_11:
1153 | offset = ssh_dissect_ssh1(tvb, pinfo, global_data,
1154 | offset, ssh_tree, is_response,
1155 | &need_desegmentation);
1156 | break;
1157 |
1158 | case SSH_VERSION_22:
1159 | offset = ssh_dissect_ssh2(tvb, pinfo, global_data,
1160 | offset, ssh_tree, is_response,
1161 | &need_desegmentation);
1162 | break;
1163 | }
1164 | }
1165 |
1166 | if (need_desegmentation)
1167 | return tvb_captured_length(tvb);
1168 | if (offset <= last_offset) {
1169 | /* XXX - add an expert info in the function
1170 | that decrements offset */
1171 | break;
1172 | }
1173 | }
1174 |
1175 | col_prepend_fstr(pinfo->cinfo, COL_INFO, "%s: ", is_response ? "Server" : "Client");
1176 | ti = proto_tree_add_boolean(ssh_tree, hf_ssh_direction, tvb, 0, 0, is_response);
1177 | proto_item_set_generated(ti);
1178 |
1179 | ssh_debug_flush();
1180 |
1181 | return tvb_captured_length(tvb);
1182 | }
1183 |
1184 | static bool_Bool
1185 | dissect_ssh_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
1186 | {
1187 | conversation_t *conversation;
1188 |
1189 | if (tvb_strneql(tvb, 0, "SSH-", 4) != 0) {
1190 | return false0;
1191 | }
1192 |
1193 | conversation = find_or_create_conversation(pinfo);
1194 | conversation_set_dissector(conversation, ssh_handle);
1195 |
1196 | dissect_ssh(tvb, pinfo, tree, data);
1197 |
1198 | return true1;
1199 | }
1200 |
1201 | static int
1202 | ssh_dissect_ssh2(tvbuff_t *tvb, packet_info *pinfo,
1203 | struct ssh_flow_data *global_data,
1204 | int offset, proto_tree *tree, int is_response,
1205 | bool_Bool *need_desegmentation)
1206 | {
1207 | proto_item *ssh2_tree = NULL((void*)0);
1208 | int remain_length;
1209 |
1210 | struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
1211 |
1212 | remain_length = tvb_captured_length_remaining(tvb, offset);
1213 |
1214 | if (PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1215 | 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" , 1215, __func__, "SSH: SECOND PASS frame %u", pinfo->num) ; } } while (0);
1216 | }else{
1217 | 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" , 1217, __func__, "SSH: FIRST PASS frame %u", pinfo->num); } } while (0);
1218 | }
1219 |
1220 | while(remain_length>0){
1221 | int last_offset = offset;
1222 | if (tree) {
1223 | wmem_strbuf_t *title = wmem_strbuf_new(pinfo->pool, "SSH Version 2");
1224 |
1225 | if (peer_data->enc || peer_data->mac || peer_data->comp) {
1226 | wmem_strbuf_append_printf(title, " (");
1227 | if (peer_data->enc)
1228 | wmem_strbuf_append_printf(title, "encryption:%s%s",
1229 | peer_data->enc,
1230 | peer_data->mac || peer_data->comp
1231 | ? " " : "");
1232 | if (peer_data->mac)
1233 | wmem_strbuf_append_printf(title, "mac:%s%s",
1234 | peer_data->mac,
1235 | peer_data->comp ? " " : "");
1236 | if (peer_data->comp)
1237 | wmem_strbuf_append_printf(title, "compression:%s",
1238 | peer_data->comp);
1239 | wmem_strbuf_append_printf(title, ")");
1240 | }
1241 |
1242 | ssh2_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_ssh2, NULL((void*)0), wmem_strbuf_get_str(title));
1243 | }
1244 | 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" , 1244, __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);
1245 | if ((peer_data->frame_key_start == 0) ||
1246 | ((peer_data->frame_key_start <= pinfo->num) &&
1247 | ((peer_data->frame_key_end == 0) || (pinfo->num < peer_data->frame_key_end) ||
1248 | ((pinfo->num == peer_data->frame_key_end) && (offset < peer_data->frame_key_end_offset))))) {
1249 | offset = ssh_dissect_key_exchange(tvb, pinfo, global_data,
1250 | offset, ssh2_tree, is_response,
1251 | need_desegmentation);
1252 |
1253 | if (!*need_desegmentation) {
1254 | ssh_get_packet_info(pinfo, is_response);
1255 | }else{
1256 | break;
1257 | }
1258 | } else {
1259 | if(!*need_desegmentation){
1260 | offset = ssh_try_dissect_encrypted_packet(tvb, pinfo,
1261 | &global_data->peer_data[is_response], offset, ssh2_tree);
1262 | if (pinfo->desegment_len) {
1263 | break;
1264 | }
1265 | }else{
1266 | break;
1267 | }
1268 | }
1269 |
1270 | if (ssh2_tree) {
1271 | proto_item_set_len(ssh2_tree, offset - last_offset);
1272 | }
1273 |
1274 | remain_length = tvb_captured_length_remaining(tvb, offset);
1275 | }
1276 |
1277 | return offset;
1278 | }
1279 | static int
1280 | ssh_dissect_ssh1(tvbuff_t *tvb, packet_info *pinfo,
1281 | struct ssh_flow_data *global_data,
1282 | int offset, proto_tree *tree, int is_response,
1283 | bool_Bool *need_desegmentation)
1284 | {
1285 | unsigned plen, padding_length, len;
1286 | uint8_t msg_code;
1287 | unsigned remain_length;
1288 |
1289 | proto_item *ssh1_tree;
1290 |
1291 | struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
1292 |
1293 | ssh1_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_ssh1, NULL((void*)0), "SSH Version 1");
1294 |
1295 | /*
1296 | * We use "tvb_ensure_captured_length_remaining()" to make sure there
1297 | * actually *is* data remaining.
1298 | *
1299 | * This means we're guaranteed that "remain_length" is positive.
1300 | */
1301 | remain_length = tvb_ensure_captured_length_remaining(tvb, offset);
1302 | /*
1303 | * Can we do reassembly?
1304 | */
1305 | if (ssh_desegment && pinfo->can_desegment) {
1306 | /*
1307 | * Yes - would an SSH header starting at this offset be split
1308 | * across segment boundaries?
1309 | */
1310 | if (remain_length < 4) {
1311 | /*
1312 | * Yes. Tell the TCP dissector where the data for
1313 | * this message starts in the data it handed us and
1314 | * that we need "some more data." Don't tell it
1315 | * exactly how many bytes we need because if/when we
1316 | * ask for even more (after the header) that will
1317 | * break reassembly.
1318 | */
1319 | pinfo->desegment_offset = offset;
1320 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
1321 | *need_desegmentation = true1;
1322 | return offset;
1323 | }
1324 | }
1325 | plen = tvb_get_ntohl(tvb, offset) ;
1326 |
1327 | /*
1328 | * Amount of random padding.
1329 | *
1330 | * This is between 1 and 8; if the length is a multiple of 8,
1331 | * there are 8 bytes of padding, not 1 byte.
1332 | *
1333 | * That means this calculation is correct; do not use either
1334 | * WS_ROUNDUP_8() or WS_PADDING_TO_8() here.
1335 | */
1336 | padding_length = 8 - plen%8;
1337 |
1338 |
1339 | if (ssh_desegment && pinfo->can_desegment) {
1340 | if (plen+4+padding_length > remain_length) {
1341 | pinfo->desegment_offset = offset;
1342 | pinfo->desegment_len = plen+padding_length - remain_length;
1343 | *need_desegmentation = true1;
1344 | return offset;
1345 | }
1346 | }
1347 |
1348 | if (plen >= SSH_MAX_PACKET_LEN32768) {
1349 | if (ssh1_tree && plen > 0) {
1350 | proto_tree_add_uint_format(ssh1_tree, hf_ssh_packet_length, tvb,
1351 | offset, 4, plen, "Overly large length %x", plen);
1352 | }
1353 | plen = remain_length-4-padding_length;
1354 | } else {
1355 | if (ssh1_tree && plen > 0) {
1356 | proto_tree_add_uint(ssh1_tree, hf_ssh_packet_length, tvb,
1357 | offset, 4, plen);
1358 | }
1359 | }
1360 | offset+=4;
1361 | /* padding length */
1362 |
1363 | proto_tree_add_uint(ssh1_tree, hf_ssh_padding_length, tvb,
1364 | offset, padding_length, padding_length);
1365 | offset += padding_length;
1366 |
1367 | /* msg_code */
1368 | if ((peer_data->frame_key_start == 0) ||
1369 | ((peer_data->frame_key_start >= pinfo->num) && (pinfo->num <= peer_data->frame_key_end))) {
1370 | msg_code = tvb_get_uint8(tvb, offset);
1371 |
1372 | proto_tree_add_item(ssh1_tree, hf_ssh_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1373 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1374 | val_to_str(pinfo->pool, msg_code, ssh1_msg_vals, "Unknown (%u)"));
1375 | offset += 1;
1376 | len = plen -1;
1377 | if (!pinfo->fd->visited) {
1378 | if (peer_data->frame_key_start == 0)
1379 | peer_data->frame_key_start = pinfo->num;
1380 | peer_data->frame_key_end = pinfo->num;
1381 | }
1382 | } else {
1383 | len = plen;
1384 | col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Encrypted packet (len=%d)", len);
1385 | }
1386 | /* payload */
1387 | if (ssh1_tree) {
1388 | proto_tree_add_item(ssh1_tree, hf_ssh_payload,
1389 | tvb, offset, len, ENC_NA0x00000000);
1390 | }
1391 | offset += len;
1392 |
1393 | return offset;
1394 | }
1395 |
1396 | static int
1397 | ssh_tree_add_mpint(tvbuff_t *tvb, int offset, proto_tree *tree,
1398 | int hf_ssh_mpint_selection)
1399 | {
1400 | unsigned len = tvb_get_ntohl(tvb, offset);
1401 | proto_tree_add_uint(tree, hf_ssh_mpint_length, tvb,
1402 | offset, 4, len);
1403 | offset+=4;
1404 | proto_tree_add_item(tree, hf_ssh_mpint_selection,
1405 | tvb, offset, len, ENC_NA0x00000000);
1406 | return 4+len;
1407 | }
1408 |
1409 | static int
1410 | ssh_tree_add_string(tvbuff_t *tvb, int offset, proto_tree *tree,
1411 | int hf_ssh_string, int hf_ssh_string_length)
1412 | {
1413 | unsigned len = tvb_get_ntohl(tvb, offset);
1414 | proto_tree_add_uint(tree, hf_ssh_string_length, tvb,
1415 | offset, 4, len);
1416 | offset+=4;
1417 | proto_tree_add_item(tree, hf_ssh_string,
1418 | tvb, offset, len, ENC_NA0x00000000);
1419 | return 4+len;
1420 | }
1421 |
1422 | static unsigned
1423 | ssh_tree_add_hostkey(tvbuff_t *tvb, packet_info* pinfo, int offset, proto_tree *parent_tree,
1424 | const char *tree_name, int ett_idx,
1425 | struct ssh_flow_data *global_data)
1426 | {
1427 | proto_tree *tree = NULL((void*)0);
1428 | proto_item *ti;
1429 | int last_offset;
1430 | int remaining_len;
1431 | unsigned key_len, type_len;
1432 | char* key_type;
1433 | char *tree_title;
1434 |
1435 | last_offset = offset;
1436 |
1437 | key_len = tvb_get_ntohl(tvb, offset);
1438 | offset += 4;
1439 |
1440 | /* Read the key type before creating the tree so we can append it as info. */
1441 | type_len = tvb_get_ntohl(tvb, offset);
1442 | offset += 4;
1443 | key_type = (char *) tvb_get_string_enc(pinfo->pool, tvb, offset, type_len, ENC_ASCII0x00000000|ENC_NA0x00000000);
1444 |
1445 | tree_title = wmem_strdup_printf(pinfo->pool, "%s (type: %s)", tree_name, key_type);
1446 | tree = proto_tree_add_subtree(parent_tree, tvb, last_offset, key_len + 4, ett_idx, NULL((void*)0),
1447 | tree_title);
1448 |
1449 | ti = proto_tree_add_uint(tree, hf_ssh_hostkey_length, tvb, last_offset, 4, key_len);
1450 |
1451 | // server host key (K_S / Q)
1452 | uint8_t *data = (uint8_t *)tvb_memdup(pinfo->pool, tvb, last_offset + 4, key_len);
1453 | if (global_data) {
1454 | // Reset array while REKEY: sanitize server host key blob
1455 | global_data->kex_server_host_key_blob = wmem_array_new(wmem_file_scope(), 1);
1456 | ssh_hash_buffer_put_string(global_data->kex_server_host_key_blob, data, key_len);
1457 | }
1458 |
1459 | last_offset += 4;
1460 | proto_tree_add_uint(tree, hf_ssh_hostkey_type_length, tvb, last_offset, 4, type_len);
1461 | proto_tree_add_string(tree, hf_ssh_hostkey_type, tvb, offset, type_len, key_type);
1462 | offset += type_len;
1463 |
1464 | if (0 == strcmp(key_type, "ssh-rsa")) {
1465 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_rsa_e);
1466 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_rsa_n);
1467 | } else if (0 == strcmp(key_type, "ssh-dss")) {
1468 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_p);
1469 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_q);
1470 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_g);
1471 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_y);
1472 | } 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-" ) )) {
1473 | offset += ssh_tree_add_string(tvb, offset, tree,
1474 | hf_ssh_hostkey_ecdsa_curve_id, hf_ssh_hostkey_ecdsa_curve_id_length);
1475 | offset += ssh_tree_add_string(tvb, offset, tree,
1476 | hf_ssh_hostkey_ecdsa_q, hf_ssh_hostkey_ecdsa_q_length);
1477 | } 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") )) {
1478 | offset += ssh_tree_add_string(tvb, offset, tree,
1479 | hf_ssh_hostkey_eddsa_key, hf_ssh_hostkey_eddsa_key_length);
1480 | } else {
1481 | remaining_len = key_len - (type_len + 4);
1482 | proto_tree_add_item(tree, hf_ssh_hostkey_data, tvb, offset, remaining_len, ENC_NA0x00000000);
1483 | offset += remaining_len;
1484 | }
1485 |
1486 | if (last_offset + (int)key_len != offset) {
1487 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but hostkey length is %d bytes", offset - last_offset, key_len);
1488 | }
1489 | return 4+key_len;
1490 | }
1491 |
1492 | static unsigned
1493 | ssh_tree_add_hostsignature(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *parent_tree,
1494 | const char *tree_name, int ett_idx,
1495 | struct ssh_flow_data *global_data)
1496 | {
1497 | (void)global_data;
1498 | proto_tree *tree = NULL((void*)0);
1499 | proto_item* ti = NULL((void*)0);
1500 | int last_offset;
1501 | int offset0 = offset;
1502 | int remaining_len;
1503 | unsigned sig_len, type_len;
1504 | const char* sig_type;
1505 | char *tree_title;
1506 |
1507 | last_offset = offset;
1508 |
1509 | sig_len = tvb_get_ntohl(tvb, offset);
1510 | offset += 4;
1511 |
1512 | /* Read the signature type before creating the tree so we can append it as info. */
1513 | type_len = tvb_get_ntohl(tvb, offset);
1514 | offset += 4;
1515 | sig_type = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset, type_len, ENC_ASCII0x00000000|ENC_NA0x00000000);
1516 |
1517 | tree_title = wmem_strdup_printf(pinfo->pool, "%s (type: %s)", tree_name, sig_type);
1518 | tree = proto_tree_add_subtree(parent_tree, tvb, last_offset, sig_len + 4, ett_idx, NULL((void*)0),
1519 | tree_title);
1520 |
1521 | ti = proto_tree_add_uint(tree, hf_ssh_hostsig_length, tvb, last_offset, 4, sig_len);
1522 |
1523 | last_offset += 4;
1524 | proto_tree_add_uint(tree, hf_ssh_hostsig_type_length, tvb, last_offset, 4, type_len);
1525 | proto_tree_add_string(tree, hf_ssh_hostsig_type, tvb, offset, type_len, sig_type);
1526 | offset += type_len;
1527 |
1528 | if (0 == strcmp(sig_type, "ssh-rsa")) {
1529 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostsig_rsa);
1530 | } else if (0 == strcmp(sig_type, "ssh-dss")) {
1531 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostsig_dsa);
1532 | // } else if (g_str_has_prefix(sig_type, "ecdsa-sha2-")) {
1533 | // offset += ssh_tree_add_string(tvb, offset, tree,
1534 | // hf_ssh_hostkey_ecdsa_curve_id, hf_ssh_hostkey_ecdsa_curve_id_length);
1535 | // ssh_tree_add_string(tvb, offset, tree,
1536 | // hf_ssh_hostkey_ecdsa_q, hf_ssh_hostkey_ecdsa_q_length);
1537 | // } else if (g_str_has_prefix(sig_type, "ssh-ed")) {
1538 | // ssh_tree_add_string(tvb, offset, tree,
1539 | // hf_ssh_hostkey_eddsa_key, hf_ssh_hostkey_eddsa_key_length);
1540 | } else {
1541 | remaining_len = sig_len - (type_len + 4);
1542 | proto_tree_add_item(tree, hf_ssh_hostsig_data, tvb, offset, remaining_len, ENC_NA0x00000000);
1543 | offset += remaining_len;
1544 | }
1545 |
1546 | if(offset-offset0!=(int)(4+sig_len)){
1547 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", offset-offset0, sig_len);
1548 | }
1549 |
1550 | return 4+sig_len;
1551 | }
1552 |
1553 | static int
1554 | ssh_dissect_key_exchange(tvbuff_t *tvb, packet_info *pinfo,
1555 | struct ssh_flow_data *global_data,
1556 | int offset, proto_tree *tree, int is_response,
1557 | bool_Bool *need_desegmentation)
1558 | {
1559 | unsigned plen, len;
1560 | uint8_t padding_length;
1561 | unsigned remain_length;
1562 | int last_offset = offset;
1563 | unsigned msg_code;
1564 |
1565 | proto_item *ti;
1566 | proto_item *key_ex_tree = NULL((void*)0);
1567 | const char *key_ex_title = "Key Exchange";
1568 |
1569 | struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
1570 |
1571 | if (PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1572 | 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" , 1572, __func__, "SSH: SECOND PASS dissecting keys -for Wireshark UI- frame %u" , pinfo->num); } } while (0);
1573 | }
1574 | /* This is after the identification string (Protocol Version Exchange)
1575 | * but before the first key exchange has completed, so we expect the SSH
1576 | * packets to be unencrypted, and to contain KEX related messages.
1577 | *
1578 | * XXX - Without the "strict kex" extension, other messages are allowed;
1579 | * most don't make sense (SSH_MSG_IGNORE and SSH_MSG_DEBUG might), but we
1580 | * could dissect them and add them to the tree.
1581 | *
1582 | * XXX - Could we combine this with ssh_dissect_decrypted_packet, with a
1583 | * flag to indicate whether we're before the initial key exchange?
1584 | */
1585 |
1586 | /*
1587 | * We use "tvb_ensure_captured_length_remaining()" to make sure there
1588 | * actually *is* data remaining.
1589 | *
1590 | * This means we're guaranteed that "remain_length" is positive.
1591 | */
1592 | remain_length = tvb_ensure_captured_length_remaining(tvb, offset);
1593 | /*
1594 | * Can we do reassembly?
1595 | */
1596 | if (ssh_desegment && pinfo->can_desegment) {
1597 | /*
1598 | * Yes - would an SSH header starting at this offset
1599 | * be split across segment boundaries?
1600 | */
1601 | if (remain_length < 4) {
1602 | /*
1603 | * Yes. Tell the TCP dissector where the data for
1604 | * this message starts in the data it handed us and
1605 | * that we need "some more data." Don't tell it
1606 | * exactly how many bytes we need because if/when we
1607 | * ask for even more (after the header) that will
1608 | * break reassembly.
1609 | */
1610 | pinfo->desegment_offset = offset;
1611 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
1612 | *need_desegmentation = true1;
1613 | return offset;
1614 | }
1615 | }
1616 | plen = tvb_get_ntohl(tvb, offset) ;
1617 |
1618 | if (ssh_desegment && pinfo->can_desegment) {
1619 | if (plen +4 > remain_length) {
1620 | pinfo->desegment_offset = offset;
1621 | pinfo->desegment_len = plen+4 - remain_length;
1622 | *need_desegmentation = true1;
1623 | return offset;
1624 | }
1625 | }
1626 | /*
1627 | * Need to check plen > 0x80000000 here
1628 | */
1629 |
1630 | ti = proto_tree_add_uint(tree, hf_ssh_packet_length, tvb,
1631 | offset, 4, plen);
1632 | if (plen >= SSH_MAX_PACKET_LEN32768) {
1633 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Overly large number %d", plen);
1634 | plen = remain_length-4;
1635 |
1636 | /* XXX - Mark as Continuation Data and return without incrementing?
1637 | * Or do so *before* using this length to desegment? */
1638 | }
1639 | offset+=4;
1640 |
1641 | ssh_packet_info_t *packet = ssh_get_packet_info(pinfo, is_response);
1642 |
1643 | int record_id = tvb_raw_offset(tvb)+offset;
1644 | ssh_message_info_t *message;
1645 | message = ssh_get_message(pinfo, record_id);
1646 | if (!message) {
1647 | message = wmem_new0(wmem_file_scope(), ssh_message_info_t)((ssh_message_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (ssh_message_info_t)));
1648 | message->sequence_number = peer_data->sequence_number++;
1649 | message->id = record_id;
1650 | /* No data, and no MAC, as is this is before encryption starts. */
1651 | message->next = NULL((void*)0);
1652 | ssh_debug_printf("%s->sequence_number++ > %d\n", is_response?"server":"client", peer_data->sequence_number);
1653 |
1654 | ssh_message_info_t **pmessage = &packet->messages;
1655 | while(*pmessage){
1656 | pmessage = &(*pmessage)->next;
1657 | }
1658 | *pmessage = message;
1659 | }
1660 |
1661 | /* padding length */
1662 | padding_length = tvb_get_uint8(tvb, offset);
1663 | proto_tree_add_uint(tree, hf_ssh_padding_length, tvb, offset, 1, padding_length);
1664 | offset += 1;
1665 |
1666 | if (global_data->kex)
1667 | key_ex_title = wmem_strdup_printf(pinfo->pool, "%s (method:%s)", key_ex_title, global_data->kex);
1668 | key_ex_tree = proto_tree_add_subtree(tree, tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), key_ex_title);
1669 |
1670 | /* msg_code */
1671 | msg_code = tvb_get_uint8(tvb, offset);
1672 |
1673 | if (msg_code >= 30 && msg_code < 40) {
1674 | offset = global_data->kex_specific_dissector(msg_code, tvb, pinfo,
1675 | offset, key_ex_tree, global_data);
1676 | } else {
1677 | proto_tree_add_item(key_ex_tree, hf_ssh2_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1678 | offset += 1;
1679 |
1680 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1681 | val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
1682 |
1683 | /* 16 bytes cookie */
1684 | switch(msg_code)
1685 | {
1686 | case SSH_MSG_KEXINIT20:
1687 | offset = ssh_dissect_key_init(tvb, pinfo, offset, key_ex_tree, is_response, global_data);
1688 | if ((peer_data->frame_key_start == 0) && (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))) {
1689 | peer_data->frame_key_start = pinfo->num;
1690 | }
1691 | break;
1692 | case SSH_MSG_NEWKEYS21:
1693 | if (peer_data->frame_key_end == 0) {
1694 | peer_data->frame_key_end = pinfo->num;
1695 | peer_data->frame_key_end_offset = offset;
1696 |
1697 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1698 | /* "After sending or receiving a SSH2_MSG_NEWKEYS message,
1699 | * reset the packet sequence number to zero. This behaviour
1700 | * persists for the duration of the connection (i.e. not
1701 | * just the first SSH2_MSG_NEWKEYS) */
1702 | if (global_data->ext_kex_strict) {
1703 | peer_data->sequence_number = 0;
1704 | ssh_debug_printf("%s->sequence_number reset to 0 (Strict KEX)\n", is_response?"server":"client");
1705 | }
1706 | }
1707 |
1708 | // the client sent SSH_MSG_NEWKEYS
1709 | if (!is_response) {
1710 | ssh_debug_printf("Activating new keys for CLIENT => SERVER\n");
1711 | ssh_decryption_setup_cipher(&global_data->peer_data[CLIENT_PEER_DATA0], &global_data->new_keys[0], &global_data->new_keys[2]);
1712 | ssh_decryption_setup_mac(&global_data->peer_data[CLIENT_PEER_DATA0], &global_data->new_keys[4]);
1713 | }else{
1714 | ssh_debug_printf("Activating new keys for SERVER => CLIENT\n");
1715 | ssh_decryption_setup_cipher(&global_data->peer_data[SERVER_PEER_DATA1], &global_data->new_keys[1], &global_data->new_keys[3]);
1716 | ssh_decryption_setup_mac(&global_data->peer_data[SERVER_PEER_DATA1], &global_data->new_keys[5]);
1717 | }
1718 | }
1719 | break;
1720 | }
1721 | }
1722 |
1723 | len = plen+4-padding_length-(offset-last_offset);
1724 | if (len > 0) {
1725 | proto_tree_add_item(key_ex_tree, hf_ssh_payload, tvb, offset, len, ENC_NA0x00000000);
1726 | }
1727 | offset += len;
1728 |
1729 | /* padding */
1730 | proto_tree_add_item(tree, hf_ssh_padding_string, tvb, offset, padding_length, ENC_NA0x00000000);
1731 | offset+= padding_length;
1732 | ti = proto_tree_add_uint(tree, hf_ssh_seq_num, tvb, offset, 0, message->sequence_number);
1733 | proto_item_set_generated(ti);
1734 |
1735 | return offset;
1736 | }
1737 |
1738 | static int ssh_dissect_kex_dh(uint8_t msg_code, tvbuff_t *tvb,
1739 | packet_info *pinfo, int offset, proto_tree *tree,
1740 | struct ssh_flow_data *global_data)
1741 | {
1742 | proto_tree_add_item(tree, hf_ssh2_kex_dh_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1743 | offset += 1;
1744 |
1745 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1746 | val_to_str(pinfo->pool, msg_code, ssh2_kex_dh_msg_vals, "Unknown (%u)"));
1747 |
1748 | switch (msg_code) {
1749 | case SSH_MSG_KEXDH_INIT30:
1750 | // e (client ephemeral key public part)
1751 | if (!ssh_read_e(tvb, offset, global_data)) {
1752 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1753 | "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1754 | }
1755 |
1756 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_e);
1757 | break;
1758 |
1759 | case SSH_MSG_KEXDH_REPLY31:
1760 | offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key",
1761 | ett_key_exchange_host_key, global_data);
1762 |
1763 | // f (server ephemeral key public part), K_S (host key)
1764 | if (!ssh_read_f(tvb, offset, global_data)) {
1765 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1766 | "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1767 | }
1768 | ssh_choose_enc_mac(global_data);
1769 | ssh_keylog_hash_write_secret(global_data, pinfo->pool);
1770 |
1771 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_f);
1772 | offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
1773 | ett_key_exchange_host_sig, global_data);
1774 | break;
1775 | }
1776 |
1777 | return offset;
1778 | }
1779 |
1780 | static int ssh_dissect_kex_dh_gex(uint8_t msg_code, tvbuff_t *tvb,
1781 | packet_info *pinfo, int offset, proto_tree *tree,
1782 | struct ssh_flow_data *global_data)
1783 | {
1784 | proto_tree_add_item(tree, hf_ssh2_kex_dh_gex_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1785 | offset += 1;
1786 |
1787 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1788 | val_to_str(pinfo->pool, msg_code, ssh2_kex_dh_gex_msg_vals, "Unknown (%u)"));
1789 |
1790 | switch (msg_code) {
1791 | case SSH_MSG_KEX_DH_GEX_REQUEST_OLD30:
1792 | proto_tree_add_item(tree, hf_ssh_dh_gex_nbits, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1793 | offset += 4;
1794 | break;
1795 |
1796 | case SSH_MSG_KEX_DH_GEX_GROUP31:
1797 | // p (Group modulo)
1798 | global_data->kex_gex_p = ssh_read_mpint(tvb, offset);
1799 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_gex_p);
1800 | // g (Group generator)
1801 | global_data->kex_gex_g = ssh_read_mpint(tvb, offset);
1802 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_gex_g);
1803 | break;
1804 |
1805 | case SSH_MSG_KEX_DH_GEX_INIT32:
1806 | // e (Client public key)
1807 | if (!ssh_read_e(tvb, offset, global_data)) {
1808 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1809 | "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1810 | }
1811 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_e);
1812 | break;
1813 |
1814 | case SSH_MSG_KEX_DH_GEX_REPLY33:
1815 | offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key",
1816 | ett_key_exchange_host_key, global_data);
1817 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1818 | ssh_read_f(tvb, offset, global_data);
1819 | // f (server ephemeral key public part), K_S (host key)
1820 | ssh_choose_enc_mac(global_data);
1821 | ssh_keylog_hash_write_secret(global_data, pinfo->pool);
1822 | }
1823 | offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_f);
1824 | offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
1825 | ett_key_exchange_host_sig, global_data);
1826 | break;
1827 |
1828 | case SSH_MSG_KEX_DH_GEX_REQUEST34:{
1829 |
1830 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1831 | ssh_hash_buffer_put_uint32(global_data->kex_gex_bits_min, tvb_get_ntohl(tvb, offset));
1832 | }
1833 | proto_tree_add_item(tree, hf_ssh_dh_gex_min, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1834 | offset += 4;
1835 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1836 | ssh_hash_buffer_put_uint32(global_data->kex_gex_bits_req, tvb_get_ntohl(tvb, offset));
1837 | }
1838 | proto_tree_add_item(tree, hf_ssh_dh_gex_nbits, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1839 | offset += 4;
1840 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1841 | ssh_hash_buffer_put_uint32(global_data->kex_gex_bits_max, tvb_get_ntohl(tvb, offset));
1842 | }
1843 | proto_tree_add_item(tree, hf_ssh_dh_gex_max, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1844 | offset += 4;
1845 | break;
1846 | }
1847 | }
1848 |
1849 | return offset;
1850 | }
1851 |
1852 | static int
1853 | ssh_dissect_kex_ecdh(uint8_t msg_code, tvbuff_t *tvb,
1854 | packet_info *pinfo, int offset, proto_tree *tree,
1855 | struct ssh_flow_data *global_data)
1856 | {
1857 | proto_tree_add_item(tree, hf_ssh2_kex_ecdh_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1858 | offset += 1;
1859 |
1860 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1861 | val_to_str(pinfo->pool, msg_code, ssh2_kex_ecdh_msg_vals, "Unknown (%u)"));
1862 |
1863 | switch (msg_code) {
1 | Control jumps to 'case 31:' at line 1873 | →
1864 | case SSH_MSG_KEX_ECDH_INIT30:
1865 | if (!ssh_read_e(tvb, offset, global_data)) {
1866 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1867 | "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1868 | }
1869 |
1870 | offset += ssh_tree_add_string(tvb, offset, tree, hf_ssh_ecdh_q_c, hf_ssh_ecdh_q_c_length);
1871 | break;
1872 |
1873 | case SSH_MSG_KEX_ECDH_REPLY31:
1874 | offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key",
1875 | ett_key_exchange_host_key, global_data);
1876 |
1877 | if (!ssh_read_f(tvb, offset, global_data)){
2 | ← | Taking true branch | →
1878 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1879 | "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1880 | }
1881 |
1882 | ssh_choose_enc_mac(global_data);
1883 | ssh_keylog_hash_write_secret(global_data, pinfo->pool);
3 | ← | Calling 'ssh_keylog_hash_write_secret' | →
1884 |
1885 | offset += ssh_tree_add_string(tvb, offset, tree, hf_ssh_ecdh_q_s, hf_ssh_ecdh_q_s_length);
1886 | offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
1887 | ett_key_exchange_host_sig, global_data);
1888 | break;
1889 | }
1890 |
1891 | return offset;
1892 | }
1893 |
1894 | static int ssh_dissect_kex_hybrid(uint8_t msg_code, tvbuff_t *tvb,
1895 | packet_info *pinfo, int offset, proto_tree *tree,
1896 | struct ssh_flow_data *global_data _U___attribute__((unused)))
1897 | {
1898 | proto_tree_add_item(tree, hf_ssh2_kex_hybrid_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1899 | offset += 1;
1900 |
1901 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1902 | val_to_str(pinfo->pool, msg_code, ssh2_kex_hybrid_msg_vals, "Unknown (%u)"));
1903 |
1904 | const char *kex_name = global_data->kex;
1905 | switch (msg_code) {
1906 | case SSH_MSG_KEX_HYBRID_INIT30:
1907 | expert_add_info(pinfo, NULL((void*)0), &ei_ssh2_kex_hybrid_msg_code_unknown);
1908 | expert_add_info(pinfo, NULL((void*)0), &ei_ssh2_kex_hybrid_msg_code);
1909 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1910 | ws_warning("KEX_HYBRID detected: KEX ALGORITHM = %s", kex_name)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_WARNING, "epan/dissectors/packet-ssh.c" , 1910, __func__, "KEX_HYBRID detected: KEX ALGORITHM = %s", kex_name ); } } while (0);
1911 | ws_warning("KEX_HYBRID KEM support in Wireshark / TShark SSH dissector may be missing, partial or experimental")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_WARNING, "epan/dissectors/packet-ssh.c" , 1911, __func__, "KEX_HYBRID KEM support in Wireshark / TShark SSH dissector may be missing, partial or experimental" ); } } while (0);
1912 | }
1913 | ws_noisy(">>> KEX_HYBRID KEM detected: 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" , 1913, __func__, ">>> KEX_HYBRID KEM detected: msg_code = %u, offset = %d, kex = %s" , msg_code, offset, kex_name); } } while (0);
1914 | break;
1915 | case SSH_MSG_KEX_HYBRID_REPLY31:
1916 | ws_noisy(">>> KEX_HYBRID KEM detected: 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" , 1916, __func__, ">>> KEX_HYBRID KEM detected: msg_code = %u, offset = %d, kex = %s" , msg_code, offset, kex_name); } } while (0);
1917 | break;
1918 | }
1919 |
1920 | return offset;
1921 | }
1922 |
1923 | /*
1924 | * === Hybrid KEX Dissection Strategy for Post-Quantum algorithms ===
1925 | *
1926 | * This 3 functions:
1927 | *
1928 | * - ssh_dissect_kex_pq_hybrid()
1929 | * - ssh_read_e_pq()
1930 | * - ssh_read_f_pq()
1931 | *
1932 | * handles the dissection of server key exchange payloads for the
1933 | * post-quantum hybrid key exchange method:
1934 | * - sntrup761x25519-sha512
1935 | * - mlkem768x25519-sha256
1936 | *
1937 | * /!\ Rationale for implementation approach:
1938 | *
1939 | * OpenSSH encodes the server's ephemeral key (`Q_S`) as a single SSH `string`
1940 | * which contains both the post-quantum KEM ciphertext (from sntrup761 / mlkem768)
1941 | * and the traditional Curve25519 public key. Therefore, we parse one string
1942 | *
1943 | * sntrup761x25519:
1944 | * - PQ ciphertext: 1039 bytes (sntrup761)
1945 | * - Curve25519 pubkey: 32 bytes
1946 | *
1947 | * mlkem768x25519:
1948 | * - PQ ciphertext: 1152 bytes (mlkem768)
1949 | * - Curve25519 pubkey: 32 bytes
1950 | *
1951 | * This matches how OpenSSH serializes the hybrid key material, and allows Wireshark
1952 | * to compute the correct key exchange hash and derive session keys accurately.
1953 | *
1954 | * /!\ This design is necessary for live decryption support in Wireshark and TShark.
1955 | *
1956 | * References:
1957 | * - RFC 4253: The SSH Transport Layer Protocol
1958 | * - Section 6: string encoding format
1959 | * - Section 7.2: Key derivation
1960 | * - RFC 8731: Secure Shell (SSH) Key Exchange Method using Curve25519
1961 | * - Internet-Draft on sntrup761x25519-sha512
1962 | * - https://www.ietf.org/archive/id/draft-josefsson-ntruprime-ssh-02.html
1963 | * - Internet-Draft on mlkem768x25519-sha256
1964 | * - https://datatracker.ietf.org/doc/draft-ietf-lamps-pq-composite-kem
1965 | * - OpenSSH Hybrid KEM Implementation (sntrup761x25519-sha512 / mlkem768x25519-sha256)
1966 | * - https://github.com/openssh/openssh-portable/blob/master/kexc25519.c
1967 | * - https://github.com/openssh/openssh-portable/blob/master/kexsntrup761x25519.c
1968 | * - https://github.com/openssh/openssh-portable/blob/master/kexmlkem768x25519.c
1969 | *
1970 | * These hybrid KEX format are experimental and not yet standardized via the IETF.
1971 | * The parsing logic here is tailored to match OpenSSH's real-world behavior to
1972 | * ensure accurate decryption support in Wireshark.
1973 | */
1974 |
1975 | static int
1976 | ssh_dissect_kex_pq_hybrid(uint8_t msg_code, tvbuff_t *tvb,
1977 | packet_info *pinfo, int offset, proto_tree *tree,
1978 | struct ssh_flow_data *global_data)
1979 | {
1980 | // SSH PACKET STRUCTURE RFC4253 (e.g. packet of 1228 bytes payload)
1981 | // [00 00 04 cc] → ssh payload blob length field in tcp packet (e.g. 1228=0x04cc): 4 bytes
1982 | // [1228 bytes of SSH PAYLOAD BLOB] → ssh payload blob field: 1228 bytes
1983 |
1984 | // Add the message code byte (first field in packet) to the GUI tree.
1985 | proto_tree_add_item(tree, hf_ssh2_kex_hybrid_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1986 | offset += 1; // Move offset past the msg_code byte.
1987 |
1988 | // Add a descriptive string to Wireshark's "Info" column.
1989 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1990 | val_to_str(pinfo->pool, msg_code, ssh2_kex_hybrid_msg_vals, "Unknown (%u)"));
1991 |
1992 | if (msg_code == SSH_MSG_KEX_HYBRID_INIT30) {
1993 | // Print warning when sntrup761x25519-sha512 or mlkem768x25519-sha256 is detected in KEX
1994 | // This implementation currently rely on SHARED_SECRET only and do not work with PRIVATE_KEY
1995 | const char *kex_name = global_data->kex;
1996 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1997 | 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" , 1997, __func__, "POST-QUANTUM KEX_HYBRID detected: KEX = %s" , kex_name); } } while (0);
1998 | 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" , 1998, __func__, "SHARED_SECRET decryption is supported - PRIVATE_KEY decryption is not supported" ); } } while (0);
1999 | }
2000 | // Print noisy debug info
2001 | 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" , 2001, __func__, ">>> HYBRID KEM: msg_code = %u, offset = %d, kex = %s" , msg_code, offset, kex_name); } } while (0);
2002 | }
2003 |
2004 | switch (msg_code) {
2005 |
2006 | // Client Key Exchange INIT
2007 | case SSH_MSG_KEX_HYBRID_INIT30: {
2008 |
2009 | // SNTRUP761X25519: RFC4253 SSH "string" (binary-encoded structure)
2010 | // [00 00 04 a6] → length = 1190 (0x04a6)
2011 | // [32 bytes of X25519 pubkey] → ephemeral X25519 public key
2012 | // [1158 bytes PQ blob] → sntrup761 encapsulated client key
2013 |
2014 | // MLKEM768X25519: RFC4253 SSH "string" (binary-encoded structure)
2015 | // [00 00 04 c0] → length = 1216 (0x04c0)
2016 | // [32 bytes of X25519 pubkey] → ephemeral X25519 public key
2017 | // [1184 bytes PQ blob] → mlkem768 encapsulated client key
2018 |
2019 | 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" , 2019, __func__, "CLIENT INIT follow offset pointer - absolute offset: %d" , offset); } } while (0); // debug trace offset
2020 | int new_offset_client = ssh_read_e_pq(tvb, offset, global_data);
2021 | if (new_offset_client < 0) {
2022 | uint32_t bad_len = tvb_get_ntohl(tvb, offset);
2023 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 4,
2024 | "Invalid PQ client key length: %u", bad_len);
2025 | 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" , 2025, __func__, "ExpertInfo: Invalid PQ client key length at offset %d: %u" , offset, bad_len); } } while (0);
2026 |
2027 | return offset + 4;
2028 | 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" , 2028, __func__, "CLIENT INIT validate PQ client key length - offset: %d" , offset); } } while (0); // debug trace offset
2029 | }
2030 |
2031 | // PQ-hybrid KEMs cannot use ssh_add_tree_string => manual dissection
2032 | // Get PQ blob size
2033 | proto_tree *pq_tree = NULL((void*)0);
2034 | uint32_t pq_len = tvb_get_ntohl(tvb, offset);
2035 | ws_debug("CLIENT INIT PQ blob length - pq_len: %d", pq_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2035, __func__, "CLIENT INIT PQ blob length - pq_len: %d", pq_len ); } } while (0); // debug trace pq_len
2036 |
2037 | // Add a subtree for dissecting PQ blob
2038 | proto_tree_add_item(tree, hf_ssh_hybrid_blob_client_len, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000); // add blob length
2039 | offset += 4; // shift length field
2040 | pq_tree = proto_tree_add_subtree(tree, tvb, offset, pq_len, ett_ssh_pqhybrid_client, NULL((void*)0), "Hybrid Key Exchange Blob Client");
2041 | 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" , 2041, __func__, "CLIENT INIT add PQ Hybrid subtree - offset: %d" , offset); } } while (0); // debug trace offset
2042 |
2043 | // Make a new tvb for just the PQ blob string contents
2044 | tvbuff_t *string_tvb = tvb_new_subset_length(tvb, offset, pq_len);
2045 |
2046 | // Now dissect string inside the blob and add PQ server response and ECDH Q_S to GUI subtree
2047 | proto_tree_add_item(pq_tree, hf_ssh_ecdh_q_c, string_tvb, 0, 32, ENC_NA0x00000000);
2048 | proto_tree_add_item(pq_tree, hf_ssh_pq_kem_client, string_tvb, 32, pq_len - 32, ENC_NA0x00000000);
2049 |
2050 | // retrieve offset from read_f_pq() to shift blob length and consume packet
2051 | offset = new_offset_client;
2052 | 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" , 2052, __func__, "CLIENT INIT shift PQ blob - offset: %d", offset ); } } while (0); // debug trace offset
2053 | break;
2054 | }
2055 |
2056 | // Server Reply Message
2057 | case SSH_MSG_KEX_HYBRID_REPLY31: {
2058 |
2059 | // SNTRUP761X25519: RFC4253 SSH "string" (binary-encoded structure)
2060 | // [00 00 00 0b] → length = 11 // blob offset:0 absolute offset:6
2061 | // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2062 | // [00 00 00 20] → length = 32
2063 | // [32 bytes of public key] → public key
2064 | // [00 00 04 2f] → length = 1071
2065 | // [1071 bytes PQ blob] → PQ blob (32 x25519 + 1039 sntrup761)
2066 |
2067 | // MLKEM768X25519: RFC4253 SSH "string" (binary-encoded structure)
2068 | // [00 00 00 0b] → length = 11 // blob offset:0 absolute offset:6
2069 | // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2070 | // [00 00 00 20] → length = 32
2071 | // [32 bytes of X25519 pubkey] → ephemeral server X25519 public key
2072 | // [00 00 04 a0] → length = 1184 (0x04a0)
2073 | // [1184 bytes PQ blob] → PQ blob (32 x25519 + 1152 kyber768)
2074 |
2075 | 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" , 2075, __func__, "SERVER REPLY follow offset pointer - absolute offset: %d" , offset); } } while (0); // debug trace offset
2076 |
2077 | // Add the host key used to sign the key exchange to the GUI tree.
2078 | offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key", ett_key_exchange_host_key, global_data);
2079 |
2080 | 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" , 2080, __func__, "SERVER REPLY add hostkey tree - offset: %d" , offset); } } while (0); // debug trace offset
2081 |
2082 | int new_offset_server = ssh_read_f_pq(tvb, offset, global_data);
2083 | if (new_offset_server < 0) {
2084 | uint32_t bad_len = tvb_get_ntohl(tvb, offset);
2085 | proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 4,
2086 | "Invalid PQ server key length: %u", bad_len);
2087 | 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" , 2087, __func__, "ExpertInfo: Invalid PQ server key length at offset %d: %u" , offset, bad_len); } } while (0);
2088 |
2089 | return offset + 4;
2090 | 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" , 2090, __func__, "SERVER REPLY validate PQ server key length - offset: %d" , offset); } } while (0); // debug trace offset
2091 | }
2092 |
2093 | // Select encryption and MAC based on negotiated algorithms.
2094 | ssh_choose_enc_mac(global_data);
2095 |
2096 | // Write session secrets to keylog file (if enabled).
2097 | ssh_keylog_hash_write_secret(global_data, pinfo->pool);
2098 |
2099 | // PQ-hybrid KEMs cannot use ssh_add_tree_string => manual dissection
2100 | // Get PQ blob size
2101 | proto_tree *pq_tree = NULL((void*)0);
2102 | uint32_t pq_len = tvb_get_ntohl(tvb, offset);
2103 | ws_debug("SERVER REPLY PQ blob length - pq_len: %d", pq_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2103, __func__, "SERVER REPLY PQ blob length - pq_len: %d", pq_len); } } while (0); // debug trace pq_len
2104 |
2105 | // Add a subtree for dissecting PQ blob
2106 | proto_tree_add_item(tree, hf_ssh_hybrid_blob_server_len, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000); // add blob length
2107 | offset += 4; // shift length field
2108 | pq_tree = proto_tree_add_subtree(tree, tvb, offset, pq_len, ett_ssh_pqhybrid_server, NULL((void*)0), "Hybrid Key Exchange Blob Server");
2109 | 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" , 2109, __func__, "SERVER REPLY add PQ Hybrid subtree - offset: %d" , offset); } } while (0); // debug trace offset
2110 |
2111 | // Make a new tvb for just the PQ blob string contents
2112 | tvbuff_t *string_tvb = tvb_new_subset_length(tvb, offset, pq_len);
2113 |
2114 | // Now dissect string inside the blob and add PQ server response and ECDH Q_S to GUI subtree
2115 | proto_tree_add_item(pq_tree, hf_ssh_ecdh_q_s, string_tvb, 0, 32, ENC_NA0x00000000);
2116 | proto_tree_add_item(pq_tree, hf_ssh_pq_kem_server, string_tvb, 32, pq_len - 32, ENC_NA0x00000000);
2117 |
2118 | // retrieve offset from read_f_pq() to shift blob length
2119 | offset = new_offset_server;
2120 | 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" , 2120, __func__, "SERVER REPLY shift PQ blob - offset: %d", offset ); } } while (0); // debug trace offset
2121 |
2122 | // Add the host's digital signature to the GUI tree
2123 | offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
2124 | ett_key_exchange_host_sig, global_data);
2125 | 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" , 2125, __func__, "SERVER REPLY add signature tree - offset: %d" , offset); } } while (0); // debug trace offset
2126 | break;
2127 | }
2128 | }
2129 |
2130 | if (msg_code == SSH_MSG_KEX_HYBRID_INIT30) {
2131 | 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" , 2131, __func__, "OUT PQ HYBRID KEX - CLIENT INIT track offset: %d" , offset); } } while (0); // debug trace offset
2132 | } else if (msg_code == SSH_MSG_KEX_HYBRID_REPLY31) {
2133 | 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" , 2133, __func__, "OUT PQ HYBRID KEX - SERVER REPLY track offset: %d" , offset); } } while (0); // debug trace offset
2134 | } else {
2135 | 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" , 2135, __func__, "OUT PQ HYBRID KEX - track offset: %d", offset ); } } while (0); // debug trace offset
2136 | }
2137 |
2138 | return offset; // Final offset after packet is processed by ssh_dissect_kex_pq_hybrid()
2139 | }
2140 |
2141 | static ssh_message_info_t*
2142 | ssh_get_message(packet_info *pinfo, int record_id)
2143 | {
2144 | ssh_packet_info_t *packet = (ssh_packet_info_t *)p_get_proto_data(
2145 | wmem_file_scope(), pinfo, proto_ssh, 0);
2146 |
2147 | if (!packet) {
2148 | return NULL((void*)0);
2149 | }
2150 |
2151 | ssh_message_info_t *message = NULL((void*)0);
2152 | for (message = packet->messages; message; message = message->next) {
2153 | 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" , 2153, __func__, "%u:looking for message %d now %d", pinfo-> num, record_id, message->id); } } while (0);
2154 | if (message->id == record_id) {
2155 | return message;
2156 | }
2157 | }
2158 |
2159 | return NULL((void*)0);
2160 | }
2161 |
2162 | static int
2163 | ssh_try_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
2164 | struct ssh_peer_data *peer_data, int offset, proto_tree *tree)
2165 | {
2166 | bool_Bool can_decrypt = peer_data->cipher != NULL((void*)0) || peer_data->cipher_id == CIPHER_NULL0x00080000;
2167 | ssh_message_info_t *message = NULL((void*)0);
2168 |
2169 | if (can_decrypt) {
2170 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2171 | ssh_decrypt_packet(tvb, pinfo, peer_data, offset);
2172 | if (pinfo->desegment_len) {
2173 | return offset;
2174 | }
2175 | }
2176 |
2177 | int record_id = tvb_raw_offset(tvb) + offset;
2178 | message = ssh_get_message(pinfo, record_id);
2179 |
2180 | if (message) {
2181 | offset += ssh_dissect_decrypted_packet(tvb_new_subset_remaining(tvb, offset), pinfo, peer_data, tree, message);
2182 | return offset;
2183 | }
2184 | }
2185 |
2186 | return ssh_dissect_encrypted_packet(tvb, pinfo, peer_data, offset, tree);
2187 | }
2188 |
2189 | static int
2190 | ssh_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
2191 | struct ssh_peer_data *peer_data,
2192 | int offset, proto_tree *tree)
2193 | {
2194 | int len;
2195 | unsigned plen;
2196 |
2197 | len = tvb_reported_length_remaining(tvb, offset);
2198 | col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Encrypted packet (len=%d)", len);
2199 |
2200 | if (tree) {
2201 | int encrypted_len = len;
2202 |
2203 | if (len > 4 && peer_data->length_is_plaintext) {
2204 | plen = tvb_get_ntohl(tvb, offset) ;
2205 | proto_tree_add_uint(tree, hf_ssh_packet_length, tvb, offset, 4, plen);
2206 | encrypted_len -= 4;
2207 | }
2208 | else if (len > 4) {
2209 | proto_tree_add_item(tree, hf_ssh_packet_length_encrypted, tvb, offset, 4, ENC_NA0x00000000);
2210 | encrypted_len -= 4;
2211 | }
2212 |
2213 | if (peer_data->mac_length>0)
2214 | encrypted_len -= peer_data->mac_length;
2215 |
2216 | proto_tree_add_item(tree, hf_ssh_encrypted_packet,
2217 | tvb, offset+4, encrypted_len, ENC_NA0x00000000);
2218 |
2219 | if (peer_data->mac_length>0)
2220 | proto_tree_add_item(tree, hf_ssh_mac_string,
2221 | tvb, offset+4+encrypted_len,
2222 | peer_data->mac_length, ENC_NA0x00000000);
2223 | }
2224 | offset += len;
2225 | return offset;
2226 | }
2227 |
2228 | static int
2229 | ssh_dissect_protocol(tvbuff_t *tvb, packet_info *pinfo,
2230 | struct ssh_flow_data *global_data,
2231 | unsigned offset, proto_tree *tree, int is_response, unsigned * version,
2232 | bool_Bool *need_desegmentation)
2233 | {
2234 | unsigned protolen, next_offset;
2235 |
2236 | /*
2237 | * If the first packet do not contain the banner,
2238 | * it is dump in the middle of a flow or not a ssh at all
2239 | */
2240 | if (tvb_strncaseeql(tvb, offset, "SSH-", 4) != 0) {
2241 | offset = ssh_dissect_encrypted_packet(tvb, pinfo,
2242 | &global_data->peer_data[is_response], offset, tree);
2243 | return offset;
2244 | }
2245 |
2246 | if (!is_response) {
2247 | if (tvb_strncaseeql(tvb, offset, "SSH-2.", 6) == 0) {
2248 | *(version) = SSH_VERSION_22;
2249 | } else if (tvb_strncaseeql(tvb, offset, "SSH-1.99-", 9) == 0) {
2250 | *(version) = SSH_VERSION_22;
2251 | } else if (tvb_strncaseeql(tvb, offset, "SSH-1.", 6) == 0) {
2252 | *(version) = SSH_VERSION_11;
2253 | }
2254 | }
2255 |
2256 | if (!tvb_find_line_end_remaining(tvb, offset, &protolen, &next_offset)) {
2257 | if (ssh_desegment && pinfo->can_desegment) {
2258 | pinfo->desegment_offset = offset;
2259 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
2260 | *need_desegmentation = true1;
2261 | return offset;
2262 | }
2263 | }
2264 | /* Either we found it, or we're not reassembling and take everything. */
2265 |
2266 | col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Protocol (%s)",
2267 | tvb_format_text(pinfo->pool, tvb, offset, protolen));
2268 |
2269 | // V_C / V_S (client and server identification strings) RFC4253 4.2
2270 | // format: SSH-protoversion-softwareversion SP comments [CR LF not incl.]
2271 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2272 | uint8_t *data = (uint8_t *)tvb_memdup(pinfo->pool, tvb, offset, protolen);
2273 | if(!is_response){
2274 | ssh_hash_buffer_put_string(global_data->kex_client_version, data, protolen);
2275 | }else{
2276 | ssh_hash_buffer_put_string(global_data->kex_server_version, data, protolen);
2277 | }
2278 | }
2279 |
2280 | proto_tree_add_item(tree, hf_ssh_protocol,
2281 | tvb, offset, protolen, ENC_ASCII0x00000000);
2282 | offset += next_offset;
2283 | return offset;
2284 | }
2285 |
2286 | static void
2287 | ssh_set_mac_length(struct ssh_peer_data *peer_data)
2288 | {
2289 | char *size_str;
2290 | uint32_t size = 0;
2291 | char *mac_name = peer_data->mac;
2292 | char *strip;
2293 |
2294 | if (!mac_name)
2295 | return;
2296 |
2297 | /* wmem_strdup() never returns NULL */
2298 | mac_name = wmem_strdup(NULL((void*)0), (const char *)mac_name);
2299 |
2300 | /* strip trailing "-etm@openssh.com" or "@openssh.com" */
2301 | strip = strstr(mac_name, "-etm@openssh.com");
2302 | if (strip) {
2303 | peer_data->length_is_plaintext = 1;
2304 | *strip = '\0';
2305 | }
2306 | else {
2307 | strip = strstr(mac_name, "@openssh.com");
2308 | if (strip) *strip = '\0';
2309 | }
2310 |
2311 | size_str = g_strrstr(mac_name, "-");
2312 | if (size_str && ws_strtou32(size_str + 1, NULL((void*)0), &size) && size > 0 && size % 8 == 0) {
2313 | peer_data->mac_length = size / 8;
2314 | }
2315 | else if (strcmp(mac_name, "hmac-sha1") == 0) {
2316 | peer_data->mac_length = 20;
2317 | }
2318 | else if (strcmp(mac_name, "hmac-md5") == 0) {
2319 | peer_data->mac_length = 16;
2320 | }
2321 | else if (strcmp(mac_name, "hmac-ripemd160") == 0) {
2322 | peer_data->mac_length = 20;
2323 | }
2324 | else if (strcmp(mac_name, "none") == 0) {
2325 | peer_data->mac_length = 0;
2326 | }
2327 |
2328 | wmem_free(NULL((void*)0), mac_name);
2329 | }
2330 |
2331 | static void ssh_set_kex_specific_dissector(struct ssh_flow_data *global_data)
2332 | {
2333 | const char *kex_name = global_data->kex;
2334 |
2335 | if (!kex_name) return;
2336 |
2337 | if (strcmp(kex_name, "diffie-hellman-group-exchange-sha1") == 0 ||
2338 | strcmp(kex_name, "diffie-hellman-group-exchange-sha256") == 0)
2339 | {
2340 | global_data->kex_specific_dissector = ssh_dissect_kex_dh_gex;
2341 | }
2342 | 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-" ) ) ||
2343 | strcmp(kex_name, "curve25519-sha256@libssh.org") == 0 ||
2344 | strcmp(kex_name, "curve25519-sha256") == 0 ||
2345 | strcmp(kex_name, "curve448-sha512") == 0)
2346 | {
2347 | global_data->kex_specific_dissector = ssh_dissect_kex_ecdh;
2348 | }
2349 | else if (strcmp(kex_name, "diffie-hellman-group14-sha256") == 0 ||
2350 | strcmp(kex_name, "diffie-hellman-group16-sha512") == 0 ||
2351 | strcmp(kex_name, "diffie-hellman-group18-sha512") == 0 ||
2352 | strcmp(kex_name, "diffie-hellman-group1-sha1") == 0 ||
2353 | strcmp(kex_name, "diffie-hellman-group14-sha1") == 0)
2354 | {
2355 | global_data->kex_specific_dissector = ssh_dissect_kex_dh;
2356 | }
2357 | else if (strcmp(kex_name, "mlkem768nistp256-sha256") == 0 ||
2358 | strcmp(kex_name, "mlkem1024nistp384-sha384") == 0)
2359 | {
2360 | global_data->kex_specific_dissector = ssh_dissect_kex_hybrid;
2361 | }
2362 | else if (strcmp(kex_name, "sntrup761x25519-sha512") == 0 ||
2363 | strcmp(kex_name, "mlkem768x25519-sha256") == 0)
2364 | /* ___add support for post-quantum hybrid KEM */
2365 | {
2366 | global_data->kex_specific_dissector = ssh_dissect_kex_pq_hybrid;
2367 | }
2368 | else
2369 | {
2370 | 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" , 2370, __func__, "NOT SUPPORTED OR UNKNOWN KEX DETECTED: ALGORITHM = %s" , kex_name); } } while (0);
2371 | }
2372 | }
2373 |
2374 | static int
2375 | ssh_gslist_compare_strings(const void *a, const void *b)
2376 | {
2377 | if (a == NULL((void*)0) && b == NULL((void*)0))
2378 | return 0;
2379 | if (a == NULL((void*)0))
2380 | return -1;
2381 | if (b == NULL((void*)0))
2382 | return 1;
2383 | return strcmp((const char*)a, (const char*)b);
2384 | }
2385 |
2386 | /* expects that *result is NULL */
2387 | static bool_Bool
2388 | ssh_choose_algo(char *client, char *server, char **result)
2389 | {
2390 | char **server_strings = NULL((void*)0);
2391 | char **client_strings = NULL((void*)0);
2392 | char **step;
2393 | GSList *server_list = NULL((void*)0);
2394 |
2395 | static const char* client_strict = "kex-strict-c-v00@openssh.com";
2396 | static const char* server_strict = "kex-strict-s-v00@openssh.com";
2397 | bool_Bool kex_strict = false0;
2398 |
2399 | if (!client || !server || !result || *result)
2400 | return false0;
2401 |
2402 | server_strings = g_strsplit(server, ",", 0);
2403 | for (step = server_strings; *step; step++) {
2404 | server_list = g_slist_append(server_list, *step);
2405 | }
2406 |
2407 | client_strings = g_strsplit(client, ",", 0);
2408 | for (step = client_strings; *step; step++) {
2409 | GSList *agreed;
2410 | if ((agreed = g_slist_find_custom(server_list, *step, ssh_gslist_compare_strings))) {
2411 | *result = wmem_strdup(wmem_file_scope(), (const char *)agreed->data);
2412 | break;
2413 | }
2414 | }
2415 |
2416 | /* Check for the OpenSSH strict key exchange extension designed to
2417 | * mitigate the Terrapin attack by resetting the packet sequence
2418 | * number to zero after a SSH2_MSG_NEWKEYS message.
2419 | * https://www.openssh.com/txt/release-9.6
2420 | * Also see PROTOCOL in the OpenSSH source distribution.
2421 | *
2422 | * OpenSSH says this is activated "when an endpoint that supports this
2423 | * extension observes this algorithm name in a peer's KEXINIT packet".
2424 | * We'll have to assume that any endpoint that supports this also
2425 | * indicates support for it in its own first SSH2_MSG_KEXINIT.
2426 | */
2427 | if (g_strv_contains((const char* const*)client_strings, client_strict) &&
2428 | g_strv_contains((const char* const*)server_strings, server_strict)) {
2429 |
2430 | kex_strict = true1;
2431 | }
2432 |
2433 | g_strfreev(client_strings);
2434 | g_slist_free(server_list);
2435 | g_strfreev(server_strings);
2436 |
2437 | return kex_strict;
2438 | }
2439 |
2440 | static int
2441 | ssh_dissect_key_init(tvbuff_t *tvb, packet_info *pinfo, int offset,
2442 | proto_tree *tree, int is_response, struct ssh_flow_data *global_data)
2443 | {
2444 | int start_offset = offset;
2445 | int payload_length;
2446 | wmem_strbuf_t *hassh_algo;
2447 | char *hassh;
2448 |
2449 | proto_item *tf, *ti;
2450 | proto_tree *key_init_tree;
2451 |
2452 | struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
2453 |
2454 | key_init_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_key_init, &tf, "Algorithms");
2455 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2456 | peer_data->bn_cookie = ssh_kex_make_bignum(tvb_get_ptr(tvb, offset, 16), 16);
2457 | }
2458 | proto_tree_add_item(key_init_tree, hf_ssh_cookie,
2459 | tvb, offset, 16, ENC_NA0x00000000);
2460 | offset += 16;
2461 |
2462 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2463 | hf_ssh_kex_algorithms_length, hf_ssh_kex_algorithms,
2464 | &peer_data->kex_proposal);
2465 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2466 | hf_ssh_server_host_key_algorithms_length,
2467 | hf_ssh_server_host_key_algorithms, NULL((void*)0));
2468 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2469 | hf_ssh_encryption_algorithms_client_to_server_length,
2470 | hf_ssh_encryption_algorithms_client_to_server,
2471 | &peer_data->enc_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2472 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2473 | hf_ssh_encryption_algorithms_server_to_client_length,
2474 | hf_ssh_encryption_algorithms_server_to_client,
2475 | &peer_data->enc_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2476 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2477 | hf_ssh_mac_algorithms_client_to_server_length,
2478 | hf_ssh_mac_algorithms_client_to_server,
2479 | &peer_data->mac_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2480 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2481 | hf_ssh_mac_algorithms_server_to_client_length,
2482 | hf_ssh_mac_algorithms_server_to_client,
2483 | &peer_data->mac_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2484 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2485 | hf_ssh_compression_algorithms_client_to_server_length,
2486 | hf_ssh_compression_algorithms_client_to_server,
2487 | &peer_data->comp_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2488 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2489 | hf_ssh_compression_algorithms_server_to_client_length,
2490 | hf_ssh_compression_algorithms_server_to_client,
2491 | &peer_data->comp_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2492 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2493 | hf_ssh_languages_client_to_server_length,
2494 | hf_ssh_languages_client_to_server, NULL((void*)0));
2495 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2496 | hf_ssh_languages_server_to_client_length,
2497 | hf_ssh_languages_server_to_client, NULL((void*)0));
2498 |
2499 | proto_tree_add_item(key_init_tree, hf_ssh_first_kex_packet_follows,
2500 | tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
2501 | offset+=1;
2502 |
2503 | proto_tree_add_item(key_init_tree, hf_ssh_kex_reserved,
2504 | tvb, offset, 4, ENC_NA0x00000000);
2505 | offset+=4;
2506 |
2507 | hassh_algo = wmem_strbuf_new(pinfo->pool, "");
2508 | if(!is_response) {
2509 | wmem_strbuf_append_printf(hassh_algo, "%s;%s;%s;%s", peer_data->kex_proposal, peer_data->enc_proposals[CLIENT_TO_SERVER_PROPOSAL0],
2510 | peer_data->mac_proposals[CLIENT_TO_SERVER_PROPOSAL0], peer_data->comp_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2511 | hassh = g_compute_checksum_for_string(G_CHECKSUM_MD5, wmem_strbuf_get_str(hassh_algo), wmem_strbuf_get_len(hassh_algo));
2512 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hassh_algo, tvb, offset, 0, wmem_strbuf_get_str(hassh_algo));
2513 | proto_item_set_generated(ti);
2514 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hassh, tvb, offset, 0, hassh);
2515 | proto_item_set_generated(ti);
2516 | g_free(hassh);
2517 | } else {
2518 | wmem_strbuf_append_printf(hassh_algo, "%s;%s;%s;%s", peer_data->kex_proposal, peer_data->enc_proposals[SERVER_TO_CLIENT_PROPOSAL1],
2519 | peer_data->mac_proposals[SERVER_TO_CLIENT_PROPOSAL1], peer_data->comp_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2520 | hassh = g_compute_checksum_for_string(G_CHECKSUM_MD5, wmem_strbuf_get_str(hassh_algo), wmem_strbuf_get_len(hassh_algo));
2521 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hasshserver_algo, tvb, offset, 0, wmem_strbuf_get_str(hassh_algo));
2522 | proto_item_set_generated(ti);
2523 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hasshserver, tvb, offset, 0, hassh);
2524 | proto_item_set_generated(ti);
2525 | g_free(hassh);
2526 | }
2527 |
2528 | if (global_data->peer_data[CLIENT_PEER_DATA0].kex_proposal &&
2529 | global_data->peer_data[SERVER_PEER_DATA1].kex_proposal &&
2530 | !global_data->kex)
2531 | {
2532 | /* Note: we're ignoring first_kex_packet_follows. */
2533 | global_data->ext_kex_strict = ssh_choose_algo(
2534 | global_data->peer_data[CLIENT_PEER_DATA0].kex_proposal,
2535 | global_data->peer_data[SERVER_PEER_DATA1].kex_proposal,
2536 | &global_data->kex);
2537 | ssh_set_kex_specific_dissector(global_data);
2538 | }
2539 |
2540 | payload_length = offset - start_offset;
2541 |
2542 | if (tf != NULL((void*)0)) {
2543 | proto_item_set_len(tf, payload_length);
2544 | }
2545 |
2546 | // I_C / I_S (client and server SSH_MSG_KEXINIT payload) RFC4253 4.2
2547 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2548 | uint8_t *data = (uint8_t *)wmem_alloc(pinfo->pool, payload_length + 1);
2549 | tvb_memcpy(tvb, data + 1, start_offset, payload_length);
2550 | data[0] = SSH_MSG_KEXINIT20;
2551 | if(is_response){
2552 | ssh_hash_buffer_put_string(global_data->kex_server_key_exchange_init, data, payload_length + 1);
2553 | }else{
2554 | // Reset array while REKEY: sanitize client key
2555 | global_data->kex_client_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
2556 | ssh_hash_buffer_put_string(global_data->kex_client_key_exchange_init, data, payload_length + 1);
2557 | }
2558 | }
2559 |
2560 | return offset;
2561 | }
2562 |
2563 | static int
2564 | ssh_dissect_proposal(tvbuff_t *tvb, int offset, proto_tree *tree,
2565 | int hf_index_length, int hf_index_value, char **store)
2566 | {
2567 | uint32_t len = tvb_get_ntohl(tvb, offset);
2568 | proto_tree_add_uint(tree, hf_index_length, tvb, offset, 4, len);
2569 | offset += 4;
2570 |
2571 | proto_tree_add_item(tree, hf_index_value, tvb, offset, len,
2572 | ENC_ASCII0x00000000);
2573 | if (store)
2574 | *store = (char *) tvb_get_string_enc(wmem_file_scope(), tvb, offset, len, ENC_ASCII0x00000000);
2575 | offset += len;
2576 |
2577 | return offset;
2578 | }
2579 |
2580 | static void
2581 | ssh_keylog_read_file(void)
2582 | {
2583 | if (!pref_keylog_file || !*pref_keylog_file) {
5 | ← | Assuming 'pref_keylog_file' is non-null | →
6 | ← | Assuming the condition is false | →
2584 | ws_debug("no keylog file preference set")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2584, __func__, "no keylog file preference set"); } } while (0);
2585 | return;
2586 | }
2587 |
2588 | if (ssh_keylog_file && file_needs_reopen(ws_filenofileno(ssh_keylog_file),
7 | ← | Assuming 'ssh_keylog_file' is non-null | →
8 | ← | Assuming the condition is false | →
9 | ← | Taking false branch | →
2589 | pref_keylog_file)) {
2590 | ssh_keylog_reset();
2591 | g_hash_table_remove_all(ssh_master_key_map);
2592 | }
2593 |
2594 | if (!ssh_keylog_file) {
10 | ← | Assuming 'ssh_keylog_file' is non-null | →
11 | ← | Taking false branch | →
2595 | ssh_keylog_file = ws_fopenfopen(pref_keylog_file, "r");
2596 | if (!ssh_keylog_file) {
2597 | 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" , 2598, __func__, "ssh: failed to open key log file %s: %s", pref_keylog_file , g_strerror((*__errno_location ()))); } } while (0)
2598 | pref_keylog_file, g_strerror(errno))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2598, __func__, "ssh: failed to open key log file %s: %s", pref_keylog_file , g_strerror((*__errno_location ()))); } } while (0);
2599 | return;
2600 | }
2601 | }
2602 |
2603 | /* File format: each line follows the format "<cookie> <type> <key>".
2604 | * <cookie> is the hex-encoded (client or server) 16 bytes cookie
2605 | * (32 characters) found in the SSH_MSG_KEXINIT of the endpoint whose
2606 | * private random is disclosed.
2607 | * <type> is either SHARED_SECRET or PRIVATE_KEY depending on the
2608 | * type of key provided. PRIVAT_KEY is only supported for DH,
2609 | * DH group exchange, and ECDH (including Curve25519) key exchanges.
2610 | * <key> is the private random number that is used to generate the DH
2611 | * negotiation (length depends on algorithm). In RFC4253 it is called
2612 | * x for the client and y for the server.
2613 | * For openssh and DH group exchange, it can be retrieved using
2614 | * DH_get0_key(kex->dh, NULL, &server_random)
2615 | * for groupN in file kexdh.c function kex_dh_compute_key
2616 | * for custom group in file kexgexs.c function input_kex_dh_gex_init
2617 | * For openssh and curve25519, it can be found in function kex_c25519_enc
2618 | * in variable server_key. One may also provide the shared secret
2619 | * directly if <type> is set to SHARED_SECRET.
2620 | *
2621 | * Example:
2622 | * 90d886612f9c35903db5bb30d11f23c2 PRIVATE_KEY DEF830C22F6C927E31972FFB20B46C96D0A5F2D5E7BE5A3A8804D6BFC431619ED10AF589EEDFF4750DEA00EFD7AFDB814B6F3528729692B1F2482041521AE9DC
2623 | */
2624 | for (;;) {
12 | ← | Loop condition is true. Entering loop body | →
2625 | // XXX - What is a reasonable max line length here? Note at a certain
2626 | // point we have to increase the maximum ssh_kex_make_bignum supports (not needed for post quantum material (pure binary)).
2627 | char buf[4096];// 4096 is needed for mlkem1024 private_key binary meterial: https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.203.pdf
2628 | buf[0] = 0;
2629 |
2630 | if (!fgets(buf, sizeof(buf), ssh_keylog_file)) {
13 | ← | Taking true branch | →
2631 | rewind(ssh_keylog_file); // Resets to start of file (to handle parallel multi sessions decryption)
14 | ← | After calling 'rewind' reading 'errno' is required to find out if the call has failed | →
2632 | if (ferror(ssh_keylog_file)) {
15 | ← | Value of 'errno' was not checked and may be overwritten by function 'ferror'
2633 | 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" , 2633, __func__, "Error while reading %s, closing it.", pref_keylog_file ); } } while (0);
2634 | ssh_keylog_reset();
2635 | g_hash_table_remove_all(ssh_master_key_map);
2636 | }
2637 | break;
2638 | }
2639 |
2640 | size_t len = strlen(buf);
2641 | while(len>0 && (buf[len-1]=='\r' || buf[len-1]=='\n')){len-=1;buf[len]=0;}
2642 | 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" , 2642, __func__, "ssh: raw keylog line read: %s", buf); } } while (0);
2643 |
2644 | ssh_keylog_process_line(buf);
2645 | }
2646 | }
2647 |
2648 | static void
2649 | ssh_keylog_process_lines(const uint8_t *data, unsigned datalen)
2650 | {
2651 | const char *next_line = (const char *)data;
2652 | const char *line_end = next_line + datalen;
2653 | while (next_line && next_line < line_end) {
2654 | const char *line = next_line;
2655 | next_line = (const char *)memchr(line, '\n', line_end - line);
2656 | ssize_t linelen;
2657 |
2658 | if (next_line) {
2659 | linelen = next_line - line;
2660 | next_line++; /* drop LF */
2661 | } else {
2662 | linelen = (ssize_t)(line_end - line);
2663 | }
2664 | if (linelen > 0 && line[linelen - 1] == '\r') {
2665 | linelen--; /* drop CR */
2666 | }
2667 |
2668 | ssh_debug_printf(" checking keylog line: %.*s\n", (int)linelen, line);
2669 | 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" , 2669, __func__, "ssh: about to process line: %.*s", (int)linelen , line); } } while (0);
2670 |
2671 | char * strippedline = g_strndup(line, linelen);
2672 | ssh_keylog_process_line(strippedline);
2673 | g_free(strippedline);
2674 | }
2675 | }
2676 |
2677 | static void
2678 | ssh_keylog_process_line(const char *line)
2679 | {
2680 | ws_noisy("ssh: process line: %s", line)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 2680, __func__, "ssh: process line: %s", line); } } while ( 0);
2681 |
2682 | char **split = g_strsplit(line, " ", 3);
2683 | char *cookie, *type, *key;
2684 | size_t cookie_len, key_len;
2685 |
2686 | if (g_strv_length(split) == 3) {
2687 | // New format: [hex-encoded cookie] [key type] [hex-encoded key material]
2688 | cookie = split[0];
2689 | type = split[1];
2690 | key = split[2];
2691 | } else if (g_strv_length(split) == 2) {
2692 | // Old format: [hex-encoded cookie] [hex-encoded private key]
2693 | 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" , 2693, __func__, "ssh keylog: detected old keylog format without explicit key type" ); } } while (0);
2694 | type = "PRIVATE_KEY";
2695 | cookie = split[0];
2696 | key = split[1];
2697 | } else {
2698 | ws_debug("ssh keylog: invalid format")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2698, __func__, "ssh keylog: invalid format"); } } while (0 );
2699 | g_strfreev(split);
2700 | return;
2701 | }
2702 |
2703 | key_len = strlen(key);
2704 | cookie_len = strlen(cookie);
2705 | if(key_len & 1){
2706 | 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" , 2706, __func__, "ssh keylog: invalid format (key should at least be even!)" ); } } while (0);
2707 | g_strfreev(split);
2708 | return;
2709 | }
2710 | if(cookie_len & 1){
2711 | 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" , 2711, __func__, "ssh keylog: invalid format (cookie should at least be even!)" ); } } while (0);
2712 | g_strfreev(split);
2713 | return;
2714 | }
2715 | ssh_bignum * bn_cookie = ssh_kex_make_bignum(NULL((void*)0), (unsigned)(cookie_len/2));
2716 | ssh_bignum * bn_priv = ssh_kex_make_bignum(NULL((void*)0), (unsigned)(key_len/2));
2717 | uint8_t c;
2718 | for (size_t i = 0; i < key_len/2; i ++) {
2719 | char v0 = key[i * 2];
2720 | int8_t h0 = ws_xton(v0);
2721 | char v1 = key[i * 2 + 1];
2722 | int8_t h1 = ws_xton(v1);
2723 |
2724 | if (h0==-1 || h1==-1) {
2725 | 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" , 2725, __func__, "ssh: can't process key, invalid hex number: %c%c" , v0, v1); } } while (0);
2726 | g_strfreev(split);
2727 | return;
2728 | }
2729 |
2730 | c = (h0 << 4) | h1;
2731 |
2732 | bn_priv->data[i] = c;
2733 | }
2734 | for (size_t i = 0; i < cookie_len/2; i ++) {
2735 | char v0 = cookie[i * 2];
2736 | int8_t h0 = ws_xton(v0);
2737 | char v1 = cookie[i * 2 + 1];
2738 | int8_t h1 = ws_xton(v1);
2739 |
2740 | if (h0==-1 || h1==-1) {
2741 | 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" , 2741, __func__, "ssh: can't process cookie, invalid hex number: %c%c" , v0, v1); } } while (0);
2742 | g_strfreev(split);
2743 | return;
2744 | }
2745 |
2746 | c = (h0 << 4) | h1;
2747 |
2748 | bn_cookie->data[i] = c;
2749 | }
2750 | ssh_bignum * bn_priv_ht = g_new(ssh_bignum, 1)((ssh_bignum *) g_malloc_n ((1), sizeof (ssh_bignum)));
2751 | bn_priv_ht->length = bn_priv->length;
2752 | bn_priv_ht->data = (uint8_t *) g_memdup2(bn_priv->data, bn_priv->length);
2753 | ssh_bignum * bn_cookie_ht = g_new(ssh_bignum, 1)((ssh_bignum *) g_malloc_n ((1), sizeof (ssh_bignum)));
2754 | bn_cookie_ht->length = bn_cookie->length;
2755 | bn_cookie_ht->data = (uint8_t *) g_memdup2(bn_cookie->data, bn_cookie->length);
2756 |
2757 | char * type_ht = (char *) g_memdup2(type, strlen(type) + 1);
2758 | 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 )));
2759 | entry_ht->type = type_ht;
2760 | entry_ht->key_material = bn_priv_ht;
2761 | g_hash_table_insert(ssh_master_key_map, bn_cookie_ht, entry_ht);
2762 | g_strfreev(split);
2763 | }
2764 |
2765 | static void
2766 | ssh_keylog_reset(void)
2767 | {
2768 | if (ssh_keylog_file) {
2769 | fclose(ssh_keylog_file);
2770 | ssh_keylog_file = NULL((void*)0);
2771 | }
2772 | }
2773 |
2774 | static unsigned
2775 | ssh_kex_type(char *type)
2776 | {
2777 | if (type) {
2778 | 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") )) {
2779 | return SSH_KEX_CURVE255190x00010000;
2780 | }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" ) )) {
2781 | return SSH_KEX_SNTRUP761X255190x00040000;
2782 | }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" ) )) {
2783 | return SSH_KEX_MLKEM768X255190x00050000;
2784 | }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") )) {
2785 | return SSH_KEX_DH_GEX0x00020000;
2786 | }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" ) )) {
2787 | return SSH_KEX_DH_GROUP140x00030014;
2788 | }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" ) )) {
2789 | return SSH_KEX_DH_GROUP160x00030016;
2790 | }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" ) )) {
2791 | return SSH_KEX_DH_GROUP180x00030018;
2792 | }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" ) )) {
2793 | return SSH_KEX_DH_GROUP10x00030001;
2794 | }
2795 | }
2796 |
2797 | return 0;
2798 | }
2799 |
2800 | static unsigned
2801 | ssh_kex_hash_type(char *type_string)
2802 | {
2803 | 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" ) )) {
2804 | return SSH_KEX_HASH_SHA11;
2805 | }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") )) {
2806 | return SSH_KEX_HASH_SHA2562;
2807 | }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") )) {
2808 | return SSH_KEX_HASH_SHA2562;
2809 | }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") )) {
2810 | return SSH_KEX_HASH_SHA5124;
2811 | } else {
2812 | 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" , 2812, __func__, "hash type %s not supported", type_string); } } while (0);
2813 | return 0;
2814 | }
2815 | }
2816 |
2817 | static ssh_bignum *
2818 | ssh_kex_make_bignum(const uint8_t *data, unsigned length)
2819 | {
2820 | // 512 bytes (4096 bits) is the maximum bignum size we're supporting
2821 | // Actually we need 513 bytes, to make provision for signed values
2822 | // Diffie-Hellman group 18 has 8192 bits
2823 | if (length == 0 || length > 1025) {
2824 | return NULL((void*)0);
2825 | }
2826 |
2827 | ssh_bignum *bn = wmem_new0(wmem_file_scope(), ssh_bignum)((ssh_bignum*)wmem_alloc0((wmem_file_scope()), sizeof(ssh_bignum )));
2828 | bn->data = (uint8_t *)wmem_alloc0(wmem_file_scope(), length);
2829 |
2830 | if (data) {
2831 | memcpy(bn->data, data, length);
2832 | }
2833 |
2834 | bn->length = length;
2835 | return bn;
2836 | }
2837 |
2838 | static bool_Bool
2839 | ssh_read_e(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2840 | {
2841 | // store the client's public part (e) for later usage
2842 | uint32_t length = tvb_get_ntohl(tvb, offset);
2843 | global_data->kex_e = ssh_kex_make_bignum(NULL((void*)0), length);
2844 | if (!global_data->kex_e) {
2845 | return false0;
2846 | }
2847 | tvb_memcpy(tvb, global_data->kex_e->data, offset + 4, length);
2848 | return true1;
2849 | }
2850 |
2851 | static bool_Bool
2852 | ssh_read_f(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2853 | {
2854 | // store the server's public part (f) for later usage
2855 | uint32_t length = tvb_get_ntohl(tvb, offset);
2856 | global_data->kex_f = ssh_kex_make_bignum(NULL((void*)0), length);
2857 | if (!global_data->kex_f) {
2858 | return false0;
2859 | }
2860 | tvb_memcpy(tvb, global_data->kex_f->data, offset + 4, length);
2861 | return true1;
2862 | }
2863 |
2864 | static int // add support of client PQ hybrid key (e)
2865 | ssh_read_e_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2866 | {
2867 | // Read length of PQ client key
2868 | uint32_t length = tvb_get_ntohl(tvb, offset);
2869 |
2870 | // Sanity check
2871 | if (length == 0 || length > 65535) {
2872 | 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" , 2872, __func__, "ssh_read_e_pq: Invalid PQ key length: %u", length); } } while (0);
2873 | return false0;
2874 | }
2875 |
2876 | // Free any existing data (if dissecting multiple sessions)
2877 | wmem_free(wmem_file_scope(), global_data->kex_e_pq);
2878 |
2879 | // Allocate and store the PQ client key
2880 | global_data->kex_e_pq = (unsigned char *)wmem_alloc(wmem_file_scope(), length);
2881 | global_data->kex_e_pq_len = length;
2882 |
2883 | tvb_memcpy(tvb, global_data->kex_e_pq, offset + 4, length);
2884 |
2885 | 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" , 2885, __func__, "Stored %u bytes of client PQ key - stored new_offset_client: %d - offset: %d" , length, offset + 4 + length, offset); } } while (0);
2886 | return offset + 4 + length; // consuming packet (advancing offset)
2887 | }
2888 |
2889 | static int // add support of server PQ hybrid key (f)
2890 | ssh_read_f_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2891 | {
2892 | // Read length of PQ server key
2893 | uint32_t length = tvb_get_ntohl(tvb, offset);
2894 |
2895 | // Sanity check
2896 | if (length == 0 || length > 65535) {
2897 | 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" , 2897, __func__, "ssh_read_f_pq: Invalid PQ key length: %u", length); } } while (0);
2898 | return false0;
2899 | }
2900 |
2901 | // Free any existing data
2902 | wmem_free(wmem_file_scope(), global_data->kex_f_pq);
2903 |
2904 | // Allocate and store the PQ server key
2905 | global_data->kex_f_pq = (unsigned char *)wmem_alloc(wmem_file_scope(), length);
2906 | global_data->kex_f_pq_len = length;
2907 |
2908 | tvb_memcpy(tvb, global_data->kex_f_pq, offset + 4, length);
2909 |
2910 | 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" , 2910, __func__, "Stored %u bytes of server PQ key - stored new_offset_server: %d - offset: %d" , length, offset + 4 + length, offset); } } while (0);
2911 | return offset + 4 + length; // consuming packet (advancing offset)
2912 | }
2913 |
2914 |
2915 | static ssh_bignum *
2916 | ssh_read_mpint(tvbuff_t *tvb, int offset)
2917 | {
2918 | // store the DH group modulo (p) for later usage
2919 | int length = tvb_get_ntohl(tvb, offset);
2920 | ssh_bignum * bn = ssh_kex_make_bignum(NULL((void*)0), length);
2921 | if (!bn) {
2922 | ws_debug("invalid bignum length %u", length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2922, __func__, "invalid bignum length %u", length); } } while (0);
2923 | return NULL((void*)0);
2924 | }
2925 | tvb_memcpy(tvb, bn->data, offset + 4, length);
2926 | return bn;
2927 | }
2928 |
2929 | static void
2930 | ssh_keylog_hash_write_secret(struct ssh_flow_data *global_data, wmem_allocator_t* tmp_allocator)
2931 | {
2932 | /*
2933 | * This computation is defined differently for each key exchange method:
2934 | * https://tools.ietf.org/html/rfc4253#page-23
2935 | * https://tools.ietf.org/html/rfc5656#page-8
2936 | * https://tools.ietf.org/html/rfc4419#page-4
2937 | * All key exchange methods:
2938 | * https://www.iana.org/assignments/ssh-parameters/ssh-parameters.xhtml#ssh-parameters-16
2939 | */
2940 |
2941 | gcry_md_hd_t hd;
2942 | ssh_key_map_entry_t *entry;
2943 | ssh_bignum *secret = NULL((void*)0);
2944 | int length;
2945 | bool_Bool client_cookie = false0;
2946 |
2947 | ssh_keylog_read_file();
4 | ← | Calling 'ssh_keylog_read_file' | →
2948 |
2949 | unsigned kex_type = ssh_kex_type(global_data->kex);
2950 | unsigned kex_hash_type = ssh_kex_hash_type(global_data->kex);
2951 |
2952 | entry = (ssh_key_map_entry_t *)g_hash_table_lookup(ssh_master_key_map, global_data->peer_data[SERVER_PEER_DATA1].bn_cookie);
2953 | if (!entry) {
2954 | entry = (ssh_key_map_entry_t *)g_hash_table_lookup(ssh_master_key_map, global_data->peer_data[CLIENT_PEER_DATA0].bn_cookie);
2955 | client_cookie = true1;
2956 | }
2957 | if (!entry) {
2958 | 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" , 2958, __func__, "ssh decryption: no entry in keylog file for this session" ); } } while (0);
2959 | global_data->do_decrypt = false0;
2960 | return;
2961 | }
2962 |
2963 | if (!strcmp(entry->type, "PRIVATE_KEY")) {
2964 | if (client_cookie) {
2965 | secret = ssh_kex_shared_secret(kex_type, global_data->kex_f, entry->key_material, global_data->kex_gex_p);
2966 | } else {
2967 | secret = ssh_kex_shared_secret(kex_type, global_data->kex_e, entry->key_material, global_data->kex_gex_p);
2968 | }
2969 | } else if (!strcmp(entry->type, "SHARED_SECRET")) {
2970 | secret = ssh_kex_make_bignum(entry->key_material->data, entry->key_material->length);
2971 | } else {
2972 | 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" , 2972, __func__, "ssh decryption: unknown key type in keylog file" ); } } while (0);
2973 | global_data->do_decrypt = false0;
2974 | return;
2975 | }
2976 |
2977 | if (!secret) {
2978 | 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" , 2978, __func__, "ssh decryption: no key material for this session" ); } } while (0);
2979 | global_data->do_decrypt = false0;
2980 | return;
2981 | }
2982 |
2983 | // shared secret data needs to be written as an mpint, and we need it later
2984 | if (kex_type == SSH_KEX_SNTRUP761X255190x00040000 || kex_type == SSH_KEX_MLKEM768X255190x00050000) {
2985 | // Reset array while REKEY: sanitize shared_secret:
2986 | global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
2987 | // For PQ KEMs: use shared_secret as-is, whether SHARED_SECRET or PRIVATE_KEY
2988 | // Do NOT prepend 0x00 (OpenSSH already encodes correctly for PQ KEM)
2989 | ssh_hash_buffer_put_string(global_data->kex_shared_secret, secret->data, secret->length);
2990 | } else {
2991 | // For all other KEX types (e.g., curve25519, ecdh-sha2, etc.)
2992 | // Pad with 0x00 if MSB is set, to comply with mpint format (RFC 4251)
2993 | if (secret->data[0] & 0x80) { // Stored in Big endian
2994 | length = secret->length + 1;
2995 | uint8_t *tmp = (uint8_t *)wmem_alloc0(tmp_allocator, length);
2996 | memcpy(tmp + 1, secret->data, secret->length);
2997 | tmp[0] = 0;
2998 | secret->data = tmp;
2999 | secret->length = length;
3000 | }
3001 | // Reset array while REKEY: sanitize shared_secret:
3002 | global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
3003 | ssh_hash_buffer_put_string(global_data->kex_shared_secret, secret->data, secret->length);
3004 | }
3005 |
3006 | wmem_array_t * kex_gex_p = wmem_array_new(tmp_allocator, 1);
3007 | 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);}
3008 | wmem_array_t * kex_gex_g = wmem_array_new(tmp_allocator, 1);
3009 | 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);}
3010 | wmem_array_t * kex_e = wmem_array_new(tmp_allocator, 1);
3011 | if(global_data->kex_e){ssh_hash_buffer_put_string(kex_e, global_data->kex_e->data, global_data->kex_e->length);}
3012 | wmem_array_t * kex_f = wmem_array_new(tmp_allocator, 1);
3013 | if(global_data->kex_f){ssh_hash_buffer_put_string(kex_f, global_data->kex_f->data, global_data->kex_f->length);}
3014 | wmem_array_t * kex_e_pq = wmem_array_new(tmp_allocator, 1);
3015 | 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);}
3016 | wmem_array_t * kex_f_pq = wmem_array_new(tmp_allocator, 1);
3017 | 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);}
3018 |
3019 | wmem_array_t * kex_hash_buffer = wmem_array_new(tmp_allocator, 1);
3020 | 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));
3021 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_client_version), wmem_array_get_count(global_data->kex_client_version));
3022 | 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));
3023 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_server_version), wmem_array_get_count(global_data->kex_server_version));
3024 | 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));
3025 | 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));
3026 | 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));
3027 | 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));
3028 | 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));
3029 | 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));
3030 | if(kex_type==SSH_KEX_DH_GEX0x00020000){
3031 | 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));
3032 | 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));
3033 | 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));
3034 | 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));
3035 | 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));
3036 | 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));
3037 | ssh_print_data("key modulo (p)", (const unsigned char *)wmem_array_get_raw(kex_gex_p), wmem_array_get_count(kex_gex_p));
3038 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_gex_p), wmem_array_get_count(kex_gex_p));
3039 | ssh_print_data("key base (g)", (const unsigned char *)wmem_array_get_raw(kex_gex_g), wmem_array_get_count(kex_gex_g));
3040 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_gex_g), wmem_array_get_count(kex_gex_g));
3041 | ssh_print_data("key client (e)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3042 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3043 | ssh_print_data("key server (f)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3044 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3045 | }
3046 | 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){
3047 | ssh_print_data("key client (e)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3048 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3049 | ssh_print_data("key server (f)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3050 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3051 | }
3052 | if(kex_type==SSH_KEX_CURVE255190x00010000){
3053 | ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3054 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3055 | ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3056 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3057 | }
3058 | if (kex_type==SSH_KEX_SNTRUP761X255190x00040000){ // Add support of sntrup761x25519
3059 | ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3060 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3061 | ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3062 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3063 | ws_noisy("Switch to SSH_KEX_SNTRUP761X25519")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 3063, __func__, "Switch to SSH_KEX_SNTRUP761X25519"); } } while (0);
3064 | }
3065 | if (kex_type==SSH_KEX_MLKEM768X255190x00050000){ // Add support of mlkem768x25519
3066 | ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3067 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3068 | ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3069 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3070 | ws_noisy("Switch to SSH_KEX_MLKEM768X25519")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 3070, __func__, "Switch to SSH_KEX_MLKEM768X25519"); } } while (0);
3071 | }
3072 | 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));
3073 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_shared_secret), wmem_array_get_count(global_data->kex_shared_secret));
3074 |
3075 | ssh_print_data("exchange", (const unsigned char *)wmem_array_get_raw(kex_hash_buffer), wmem_array_get_count(kex_hash_buffer));
3076 |
3077 | unsigned hash_len = 32;
3078 | if(kex_hash_type==SSH_KEX_HASH_SHA11) {
3079 | gcry_md_open(&hd, GCRY_MD_SHA1, 0);
3080 | hash_len = 20;
3081 | } else if(kex_hash_type==SSH_KEX_HASH_SHA2562) {
3082 | gcry_md_open(&hd, GCRY_MD_SHA256, 0);
3083 | hash_len = 32;
3084 | } else if(kex_hash_type==SSH_KEX_HASH_SHA5124) {
3085 | gcry_md_open(&hd, GCRY_MD_SHA512, 0);
3086 | hash_len = 64;
3087 | } else {
3088 | 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" , 3088, __func__, "kex_hash_type type %d not supported", kex_hash_type ); } } while (0);
3089 | return;
3090 | }
3091 | uint8_t *exchange_hash = (uint8_t *)wmem_alloc0(wmem_file_scope(), hash_len);
3092 | gcry_md_write(hd, wmem_array_get_raw(kex_hash_buffer), wmem_array_get_count(kex_hash_buffer));
3093 | memcpy(exchange_hash, gcry_md_read(hd, 0), hash_len);
3094 | gcry_md_close(hd);
3095 | ssh_print_data("hash", exchange_hash, hash_len);
3096 | global_data->secret = secret;
3097 | ssh_derive_symmetric_keys(secret, exchange_hash, hash_len, global_data);
3098 | }
3099 |
3100 | // the purpose of this function is to deal with all different kex methods
3101 | static ssh_bignum *
3102 | ssh_kex_shared_secret(int kex_type, ssh_bignum *pub, ssh_bignum *priv, ssh_bignum *modulo)
3103 | {
3104 | DISSECTOR_ASSERT(pub != NULL)((void) ((pub != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c" , 3104, "pub != ((void*)0)"))));
3105 | DISSECTOR_ASSERT(priv != NULL)((void) ((priv != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c" , 3105, "priv != ((void*)0)"))));
3106 |
3107 | ssh_bignum *secret = ssh_kex_make_bignum(NULL((void*)0), pub->length);
3108 | if (!secret) {
3109 | ws_debug("invalid key length %u", pub->length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3109, __func__, "invalid key length %u", pub->length); } } while (0);
3110 | return NULL((void*)0);
3111 | }
3112 |
3113 | if(kex_type==SSH_KEX_DH_GEX0x00020000){
3114 | if (modulo == NULL((void*)0)) {
3115 | ws_debug("Missing group modulo")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3115, __func__, "Missing group modulo"); } } while (0);
3116 | return NULL((void*)0);
3117 | }
3118 | gcry_mpi_t b = NULL((void*)0);
3119 | gcry_mpi_scan(&b, GCRYMPI_FMT_USG, pub->data, pub->length, NULL((void*)0));
3120 | gcry_mpi_t d = NULL((void*)0), e = NULL((void*)0), m = NULL((void*)0);
3121 | size_t result_len = 0;
3122 | d = gcry_mpi_new(pub->length*8);
3123 | gcry_mpi_scan(&e, GCRYMPI_FMT_USG, priv->data, priv->length, NULL((void*)0));
3124 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, modulo->data, modulo->length, NULL((void*)0));
3125 | gcry_mpi_powm(d, b, e, m); // gcry_mpi_powm(d, b, e, m) => d = b^e % m
3126 | gcry_mpi_print(GCRYMPI_FMT_USG, secret->data, secret->length, &result_len, d);
3127 | secret->length = (unsigned)result_len; // Should not be larger than what fits in a 32-bit unsigned integer...
3128 | gcry_mpi_release(d);
3129 | gcry_mpi_release(b);
3130 | gcry_mpi_release(e);
3131 | gcry_mpi_release(m);
3132 |
3133 | }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){
3134 | gcry_mpi_t m = NULL((void*)0);
3135 | if(kex_type==SSH_KEX_DH_GROUP10x00030001){
3136 | static const uint8_t p[] = {
3137 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3138 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3139 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3140 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3141 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3142 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3143 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3144 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE6, 0x53, 0x81, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3145 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3146 | }else if(kex_type==SSH_KEX_DH_GROUP140x00030014){
3147 | //p:
3148 | static const uint8_t p[] = {
3149 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3150 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3151 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3152 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3153 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3154 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3155 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3156 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3157 | 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3158 | 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3159 | 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3160 | 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3161 | 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3162 | 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3163 | 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3164 | 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAC, 0xAA, 0x68, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
3165 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3166 | }else if(kex_type==SSH_KEX_DH_GROUP160x00030016){
3167 | //p:
3168 | static const uint8_t p[] = {
3169 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3170 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3171 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3172 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3173 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3174 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3175 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3176 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3177 | 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3178 | 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3179 | 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3180 | 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3181 | 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3182 | 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3183 | 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3184 | 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D, 0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33,
3185 | 0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64, 0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A,
3186 | 0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, 0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7,
3187 | 0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, 0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D,
3188 | 0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B, 0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64,
3189 | 0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64, 0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C,
3190 | 0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, 0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2,
3191 | 0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, 0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E,
3192 | 0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01, 0x1A, 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7,
3193 | 0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA, 0x5B, 0x26, 0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C,
3194 | 0x1A, 0x94, 0x68, 0x34, 0xB6, 0x15, 0x0B, 0xDA, 0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,
3195 | 0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9, 0x2E, 0x8E, 0xFC, 0x14, 0x1F, 0xBE, 0xCA, 0xA6,
3196 | 0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D, 0x99, 0xB2, 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2,
3197 | 0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7, 0xED, 0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF,
3198 | 0xB8, 0x1B, 0xDD, 0x76, 0x21, 0x70, 0x48, 0x1C, 0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9,
3199 | 0x93, 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1, 0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6, 0xC0, 0x8F,
3200 | 0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x06, 0x31, 0x99, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3201 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3202 | }else if(kex_type==SSH_KEX_DH_GROUP180x00030018){
3203 | //p:
3204 | static const uint8_t p[] = {
3205 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3206 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3207 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3208 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3209 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3210 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3211 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3212 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3213 | 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3214 | 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3215 | 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3216 | 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3217 | 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3218 | 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3219 | 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3220 | 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D, 0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33,
3221 | 0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64, 0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A,
3222 | 0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, 0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7,
3223 | 0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, 0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D,
3224 | 0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B, 0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64,
3225 | 0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64, 0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C,
3226 | 0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, 0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2,
3227 | 0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, 0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E,
3228 | 0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01, 0x1A, 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7,
3229 | 0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA, 0x5B, 0x26, 0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C,
3230 | 0x1A, 0x94, 0x68, 0x34, 0xB6, 0x15, 0x0B, 0xDA, 0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,
3231 | 0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9, 0x2E, 0x8E, 0xFC, 0x14, 0x1F, 0xBE, 0xCA, 0xA6,
3232 | 0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D, 0x99, 0xB2, 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2,
3233 | 0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7, 0xED, 0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF,
3234 | 0xB8, 0x1B, 0xDD, 0x76, 0x21, 0x70, 0x48, 0x1C, 0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9,
3235 | 0x93, 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1, 0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6, 0xC0, 0x8F,
3236 | 0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x02, 0x84, 0x92, 0x36, 0xC3, 0xFA, 0xB4, 0xD2, 0x7C, 0x70, 0x26,
3237 | 0xC1, 0xD4, 0xDC, 0xB2, 0x60, 0x26, 0x46, 0xDE, 0xC9, 0x75, 0x1E, 0x76, 0x3D, 0xBA, 0x37, 0xBD,
3238 | 0xF8, 0xFF, 0x94, 0x06, 0xAD, 0x9E, 0x53, 0x0E, 0xE5, 0xDB, 0x38, 0x2F, 0x41, 0x30, 0x01, 0xAE,
3239 | 0xB0, 0x6A, 0x53, 0xED, 0x90, 0x27, 0xD8, 0x31, 0x17, 0x97, 0x27, 0xB0, 0x86, 0x5A, 0x89, 0x18,
3240 | 0xDA, 0x3E, 0xDB, 0xEB, 0xCF, 0x9B, 0x14, 0xED, 0x44, 0xCE, 0x6C, 0xBA, 0xCE, 0xD4, 0xBB, 0x1B,
3241 | 0xDB, 0x7F, 0x14, 0x47, 0xE6, 0xCC, 0x25, 0x4B, 0x33, 0x20, 0x51, 0x51, 0x2B, 0xD7, 0xAF, 0x42,
3242 | 0x6F, 0xB8, 0xF4, 0x01, 0x37, 0x8C, 0xD2, 0xBF, 0x59, 0x83, 0xCA, 0x01, 0xC6, 0x4B, 0x92, 0xEC,
3243 | 0xF0, 0x32, 0xEA, 0x15, 0xD1, 0x72, 0x1D, 0x03, 0xF4, 0x82, 0xD7, 0xCE, 0x6E, 0x74, 0xFE, 0xF6,
3244 | 0xD5, 0x5E, 0x70, 0x2F, 0x46, 0x98, 0x0C, 0x82, 0xB5, 0xA8, 0x40, 0x31, 0x90, 0x0B, 0x1C, 0x9E,
3245 | 0x59, 0xE7, 0xC9, 0x7F, 0xBE, 0xC7, 0xE8, 0xF3, 0x23, 0xA9, 0x7A, 0x7E, 0x36, 0xCC, 0x88, 0xBE,
3246 | 0x0F, 0x1D, 0x45, 0xB7, 0xFF, 0x58, 0x5A, 0xC5, 0x4B, 0xD4, 0x07, 0xB2, 0x2B, 0x41, 0x54, 0xAA,
3247 | 0xCC, 0x8F, 0x6D, 0x7E, 0xBF, 0x48, 0xE1, 0xD8, 0x14, 0xCC, 0x5E, 0xD2, 0x0F, 0x80, 0x37, 0xE0,
3248 | 0xA7, 0x97, 0x15, 0xEE, 0xF2, 0x9B, 0xE3, 0x28, 0x06, 0xA1, 0xD5, 0x8B, 0xB7, 0xC5, 0xDA, 0x76,
3249 | 0xF5, 0x50, 0xAA, 0x3D, 0x8A, 0x1F, 0xBF, 0xF0, 0xEB, 0x19, 0xCC, 0xB1, 0xA3, 0x13, 0xD5, 0x5C,
3250 | 0xDA, 0x56, 0xC9, 0xEC, 0x2E, 0xF2, 0x96, 0x32, 0x38, 0x7F, 0xE8, 0xD7, 0x6E, 0x3C, 0x04, 0x68,
3251 | 0x04, 0x3E, 0x8F, 0x66, 0x3F, 0x48, 0x60, 0xEE, 0x12, 0xBF, 0x2D, 0x5B, 0x0B, 0x74, 0x74, 0xD6,
3252 | 0xE6, 0x94, 0xF9, 0x1E, 0x6D, 0xBE, 0x11, 0x59, 0x74, 0xA3, 0x92, 0x6F, 0x12, 0xFE, 0xE5, 0xE4,
3253 | 0x38, 0x77, 0x7C, 0xB6, 0xA9, 0x32, 0xDF, 0x8C, 0xD8, 0xBE, 0xC4, 0xD0, 0x73, 0xB9, 0x31, 0xBA,
3254 | 0x3B, 0xC8, 0x32, 0xB6, 0x8D, 0x9D, 0xD3, 0x00, 0x74, 0x1F, 0xA7, 0xBF, 0x8A, 0xFC, 0x47, 0xED,
3255 | 0x25, 0x76, 0xF6, 0x93, 0x6B, 0xA4, 0x24, 0x66, 0x3A, 0xAB, 0x63, 0x9C, 0x5A, 0xE4, 0xF5, 0x68,
3256 | 0x34, 0x23, 0xB4, 0x74, 0x2B, 0xF1, 0xC9, 0x78, 0x23, 0x8F, 0x16, 0xCB, 0xE3, 0x9D, 0x65, 0x2D,
3257 | 0xE3, 0xFD, 0xB8, 0xBE, 0xFC, 0x84, 0x8A, 0xD9, 0x22, 0x22, 0x2E, 0x04, 0xA4, 0x03, 0x7C, 0x07,
3258 | 0x13, 0xEB, 0x57, 0xA8, 0x1A, 0x23, 0xF0, 0xC7, 0x34, 0x73, 0xFC, 0x64, 0x6C, 0xEA, 0x30, 0x6B,
3259 | 0x4B, 0xCB, 0xC8, 0x86, 0x2F, 0x83, 0x85, 0xDD, 0xFA, 0x9D, 0x4B, 0x7F, 0xA2, 0xC0, 0x87, 0xE8,
3260 | 0x79, 0x68, 0x33, 0x03, 0xED, 0x5B, 0xDD, 0x3A, 0x06, 0x2B, 0x3C, 0xF5, 0xB3, 0xA2, 0x78, 0xA6,
3261 | 0x6D, 0x2A, 0x13, 0xF8, 0x3F, 0x44, 0xF8, 0x2D, 0xDF, 0x31, 0x0E, 0xE0, 0x74, 0xAB, 0x6A, 0x36,
3262 | 0x45, 0x97, 0xE8, 0x99, 0xA0, 0x25, 0x5D, 0xC1, 0x64, 0xF3, 0x1C, 0xC5, 0x08, 0x46, 0x85, 0x1D,
3263 | 0xF9, 0xAB, 0x48, 0x19, 0x5D, 0xED, 0x7E, 0xA1, 0xB1, 0xD5, 0x10, 0xBD, 0x7E, 0xE7, 0x4D, 0x73,
3264 | 0xFA, 0xF3, 0x6B, 0xC3, 0x1E, 0xCF, 0xA2, 0x68, 0x35, 0x90, 0x46, 0xF4, 0xEB, 0x87, 0x9F, 0x92,
3265 | 0x40, 0x09, 0x43, 0x8B, 0x48, 0x1C, 0x6C, 0xD7, 0x88, 0x9A, 0x00, 0x2E, 0xD5, 0xEE, 0x38, 0x2B,
3266 | 0xC9, 0x19, 0x0D, 0xA6, 0xFC, 0x02, 0x6E, 0x47, 0x95, 0x58, 0xE4, 0x47, 0x56, 0x77, 0xE9, 0xAA,
3267 | 0x9E, 0x30, 0x50, 0xE2, 0x76, 0x56, 0x94, 0xDF, 0xC8, 0x1F, 0x56, 0xE8, 0x80, 0xB9, 0x6E, 0x71,
3268 | 0x60, 0xC9, 0x80, 0xDD, 0x98, 0xED, 0xD3, 0xDF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3269 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3270 | }
3271 |
3272 | gcry_mpi_t b = NULL((void*)0);
3273 | gcry_mpi_scan(&b, GCRYMPI_FMT_USG, pub->data, pub->length, NULL((void*)0));
3274 | gcry_mpi_t d = NULL((void*)0), e = NULL((void*)0);
3275 | size_t result_len = 0;
3276 | d = gcry_mpi_new(pub->length*8);
3277 | gcry_mpi_scan(&e, GCRYMPI_FMT_USG, priv->data, priv->length, NULL((void*)0));
3278 | gcry_mpi_powm(d, b, e, m); // gcry_mpi_powm(d, b, e, m) => d = b^e % m
3279 | gcry_mpi_print(GCRYMPI_FMT_USG, secret->data, secret->length, &result_len, d);
3280 | secret->length = (unsigned)result_len; // Should not be larger than what fits in a 32-bit unsigned integer...
3281 | gcry_mpi_release(d);
3282 | gcry_mpi_release(b);
3283 | gcry_mpi_release(e);
3284 | gcry_mpi_release(m);
3285 | }else if(kex_type==SSH_KEX_CURVE255190x00010000){
3286 | if (crypto_scalarmult_curve25519(secret->data, priv->data, pub->data)) {
3287 | ws_debug("curve25519: can't compute shared secret")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3287, __func__, "curve25519: can't compute shared secret"); } } while (0);
3288 | return NULL((void*)0);
3289 | }
3290 | } else {
3291 | 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" , 3291, __func__, "kex_type type %d not supported", kex_type) ; } } while (0);
3292 | return 0;
3293 | }
3294 |
3295 | return secret;
3296 | }
3297 |
3298 | static char *
3299 | ssh_string(wmem_allocator_t* allocator, const uint8_t *string, unsigned length)
3300 | {
3301 | char *ssh_string = (char *)wmem_alloc(allocator, length + 4);
3302 | ssh_string[0] = (length >> 24) & 0xff;
3303 | ssh_string[1] = (length >> 16) & 0xff;
3304 | ssh_string[2] = (length >> 8) & 0xff;
3305 | ssh_string[3] = length & 0xff;
3306 | memcpy(ssh_string + 4, string, length);
3307 | return ssh_string;
3308 | }
3309 |
3310 | static void
3311 | ssh_hash_buffer_put_string(wmem_array_t *buffer, const uint8_t *string,
3312 | unsigned length)
3313 | {
3314 | if (!buffer) {
3315 | return;
3316 | }
3317 |
3318 | char *string_with_length = ssh_string(wmem_array_get_allocator(buffer), string, length);
3319 | wmem_array_append(buffer, string_with_length, length + 4);
3320 | }
3321 |
3322 | static void
3323 | ssh_hash_buffer_put_uint32(wmem_array_t *buffer, unsigned val)
3324 | {
3325 | if (!buffer) {
3326 | return;
3327 | }
3328 |
3329 | char buf[4];
3330 | buf[0] = (val >> 24); buf[1] = (val >> 16); buf[2] = (val >> 8); buf[3] = (val >> 0);
3331 | wmem_array_append(buffer, buf, 4);
3332 | }
3333 |
3334 | static void ssh_derive_symmetric_keys(ssh_bignum *secret, uint8_t *exchange_hash,
3335 | unsigned hash_length, struct ssh_flow_data *global_data)
3336 | {
3337 | if (!global_data->session_id) {
3338 | global_data->session_id = exchange_hash;
3339 | global_data->session_id_length = hash_length;
3340 | }
3341 |
3342 | unsigned int we_need = 0;
3343 | for(int peer_cnt=0;peer_cnt<2;peer_cnt++){
3344 | struct ssh_peer_data * peer_data = &global_data->peer_data[peer_cnt];
3345 | // required size of key depends on cipher used. chacha20 wants 64 bytes
3346 | unsigned need = 0;
3347 | if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3348 | need = 64;
3349 | } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id || CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id) {
3350 | need = 16;
3351 | } else if (CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id) {
3352 | need = 24;
3353 | } else if (CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
3354 | need = 32;
3355 | } else {
3356 | ssh_debug_printf("ssh: cipher (%d) is unknown or not set\n", peer_data->cipher_id);
3357 | ssh_debug_flush();
3358 | }
3359 | if(peer_data->mac_id == CIPHER_MAC_SHA2_2560x00020001){
3360 | need = 32;
3361 | }else{
3362 | ssh_debug_printf("ssh: MAC (%d) is unknown or not set\n", peer_data->mac_id);
3363 | ssh_debug_flush();
3364 | }
3365 | if (we_need<need) {
3366 | we_need = need;
3367 | }
3368 | }
3369 |
3370 | for (int i = 0; i < 6; i ++) {
3371 | ssh_derive_symmetric_key(secret, exchange_hash, hash_length,
3372 | 'A' + i, &global_data->new_keys[i], global_data, we_need);
3373 | if(i==0){ ssh_print_data("Initial IV client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3374 | }else if(i==1){ ssh_print_data("Initial IV server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3375 | }else if(i==2){ ssh_print_data("Encryption key client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3376 | }else if(i==3){ ssh_print_data("Encryption key server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3377 | }else if(i==4){ ssh_print_data("Integrity key client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3378 | }else if(i==5){ ssh_print_data("Integrity key server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3379 | }
3380 | }
3381 | }
3382 |
3383 | static void ssh_derive_symmetric_key(ssh_bignum *secret, const uint8_t *exchange_hash,
3384 | unsigned hash_length, char id, ssh_bignum *result_key,
3385 | struct ssh_flow_data *global_data, unsigned we_need)
3386 | {
3387 | gcry_md_hd_t hd;
3388 |
3389 | unsigned kex_hash_type = ssh_kex_hash_type(global_data->kex);
3390 | int algo = GCRY_MD_SHA256;
3391 | if(kex_hash_type==SSH_KEX_HASH_SHA11){
3392 | algo = GCRY_MD_SHA1;
3393 | }else if(kex_hash_type==SSH_KEX_HASH_SHA2562){
3394 | algo = GCRY_MD_SHA256;
3395 | }else if(kex_hash_type==SSH_KEX_HASH_SHA5124){
3396 | algo = GCRY_MD_SHA512;
3397 | }
3398 | unsigned len = gcry_md_get_algo_dlen(algo);
3399 |
3400 | result_key->data = (unsigned char *)wmem_alloc(wmem_file_scope(), we_need);
3401 |
3402 | char *secret_with_length = ssh_string(NULL((void*)0), secret->data, secret->length);
3403 |
3404 | if (gcry_md_open(&hd, algo, 0) == 0) {
3405 | gcry_md_write(hd, secret_with_length, secret->length + 4);
3406 | gcry_md_write(hd, exchange_hash, hash_length);
3407 | 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);
3408 | gcry_md_write(hd, global_data->session_id, hash_length);
3409 | unsigned add_length = MIN(len, we_need)(((len) < (we_need)) ? (len) : (we_need));
3410 | memcpy(result_key->data, gcry_md_read(hd, 0), add_length);
3411 | gcry_md_close(hd);
3412 | }
3413 |
3414 | // expand key
3415 | for (unsigned have = len; have < we_need; have += len) {
3416 | if (gcry_md_open(&hd, algo, 0) == 0) {
3417 | gcry_md_write(hd, secret_with_length, secret->length + 4);
3418 | gcry_md_write(hd, exchange_hash, hash_length);
3419 | gcry_md_write(hd, result_key->data+have-len, len);
3420 | unsigned add_length = MIN(len, we_need - have)(((len) < (we_need - have)) ? (len) : (we_need - have));
3421 | memcpy(result_key->data+have, gcry_md_read(hd, 0), add_length);
3422 | gcry_md_close(hd);
3423 | }
3424 | }
3425 | wmem_free(NULL((void*)0), secret_with_length);
3426 |
3427 | result_key->length = we_need;
3428 | }
3429 |
3430 | static void
3431 | ssh_choose_enc_mac(struct ssh_flow_data *global_data)
3432 | {
3433 | for(int peer_cnt=0;peer_cnt<2;peer_cnt++){
3434 | struct ssh_peer_data * peer_data = &global_data->peer_data[peer_cnt];
3435 | ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].enc_proposals[peer_cnt],
3436 | global_data->peer_data[SERVER_PEER_DATA1].enc_proposals[peer_cnt],
3437 | &peer_data->enc);
3438 | /* some ciphers have their own MAC so the "negotiated" one is meaningless */
3439 | if(peer_data->enc && (0 == strcmp(peer_data->enc, "aes128-gcm@openssh.com") ||
3440 | 0 == strcmp(peer_data->enc, "aes256-gcm@openssh.com"))) {
3441 | peer_data->mac = wmem_strdup(wmem_file_scope(), (const char *)"<implicit>");
3442 | peer_data->mac_length = 16;
3443 | peer_data->length_is_plaintext = 1;
3444 | }
3445 | else if(peer_data->enc && 0 == strcmp(peer_data->enc, "chacha20-poly1305@openssh.com")) {
3446 | peer_data->mac = wmem_strdup(wmem_file_scope(), (const char *)"<implicit>");
3447 | peer_data->mac_length = 16;
3448 | }
3449 | else {
3450 | ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].mac_proposals[peer_cnt],
3451 | global_data->peer_data[SERVER_PEER_DATA1].mac_proposals[peer_cnt],
3452 | &peer_data->mac);
3453 | ssh_set_mac_length(peer_data);
3454 | }
3455 | ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].comp_proposals[peer_cnt],
3456 | global_data->peer_data[SERVER_PEER_DATA1].comp_proposals[peer_cnt],
3457 | &peer_data->comp);
3458 | }
3459 |
3460 | ssh_decryption_set_cipher_id(&global_data->peer_data[CLIENT_PEER_DATA0]);
3461 | ssh_decryption_set_mac_id(&global_data->peer_data[CLIENT_PEER_DATA0]);
3462 | ssh_decryption_set_cipher_id(&global_data->peer_data[SERVER_PEER_DATA1]);
3463 | ssh_decryption_set_mac_id(&global_data->peer_data[SERVER_PEER_DATA1]);
3464 | }
3465 |
3466 | static void
3467 | ssh_decryption_set_cipher_id(struct ssh_peer_data *peer)
3468 | {
3469 | char *cipher_name = peer->enc;
3470 |
3471 | if (!cipher_name) {
3472 | peer->cipher = NULL((void*)0);
3473 | ws_debug("ERROR: cipher_name is NULL")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3473, __func__, "ERROR: cipher_name is NULL"); } } while (0 );
3474 | } else if (0 == strcmp(cipher_name, "chacha20-poly1305@openssh.com")) { // add chacha20-poly1305@openssh.com
3475 | peer->cipher_id = GCRY_CIPHER_CHACHA20;
3476 | } else if (0 == strcmp(cipher_name, "chacha20-poly1305")) { // add chacha20-poly1305
3477 | peer->cipher_id = GCRY_CIPHER_CHACHA20;
3478 | } else if (0 == strcmp(cipher_name, "aes128-gcm@openssh.com")) {
3479 | peer->cipher_id = CIPHER_AES128_GCM0x00040001;
3480 | } else if (0 == strcmp(cipher_name, "aes128-gcm")) {
3481 | peer->cipher_id = CIPHER_AES128_GCM0x00040001;
3482 | } else if (0 == strcmp(cipher_name, "aes256-gcm@openssh.com")) {
3483 | peer->cipher_id = CIPHER_AES256_GCM0x00040004;
3484 | } else if (0 == strcmp(cipher_name, "aes256-gcm")) {
3485 | peer->cipher_id = CIPHER_AES256_GCM0x00040004;
3486 | } else if (0 == strcmp(cipher_name, "aes128-cbc")) {
3487 | peer->cipher_id = CIPHER_AES128_CBC0x00020001;
3488 | } else if (0 == strcmp(cipher_name, "aes192-cbc")) {
3489 | peer->cipher_id = CIPHER_AES192_CBC0x00020002;
3490 | } else if (0 == strcmp(cipher_name, "aes256-cbc")) {
3491 | peer->cipher_id = CIPHER_AES256_CBC0x00020004;
3492 | } else if (0 == strcmp(cipher_name, "aes128-ctr")) {
3493 | peer->cipher_id = CIPHER_AES128_CTR0x00010001;
3494 | } else if (0 == strcmp(cipher_name, "aes192-ctr")) {
3495 | peer->cipher_id = CIPHER_AES192_CTR0x00010003;
3496 | } else if (0 == strcmp(cipher_name, "aes256-ctr")) {
3497 | peer->cipher_id = CIPHER_AES256_CTR0x00010004;
3498 | } else if (0 == strcmp(cipher_name, "none")) {
3499 | peer->cipher_id = CIPHER_NULL0x00080000;
3500 | peer->length_is_plaintext = 1;
3501 | } else {
3502 | peer->cipher = NULL((void*)0);
3503 | ws_debug("decryption not supported: %s", cipher_name)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3503, __func__, "decryption not supported: %s", cipher_name ); } } while (0);
3504 | }
3505 | }
3506 |
3507 | static void
3508 | ssh_decryption_set_mac_id(struct ssh_peer_data *peer)
3509 | {
3510 | char *mac_name = peer->mac;
3511 |
3512 | if (!mac_name) {
3513 | peer->mac = NULL((void*)0);
3514 | ws_debug("ERROR: mac_name is NULL")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3514, __func__, "ERROR: mac_name is NULL"); } } while (0);
3515 | } else if (0 == strcmp(mac_name, "hmac-sha2-256")) {
3516 | peer->mac_id = CIPHER_MAC_SHA2_2560x00020001;
3517 | } else {
3518 | 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" , 3518, __func__, "decryption MAC not supported: %s", mac_name ); } } while (0);
3519 | }
3520 | }
3521 |
3522 | static bool_Bool
3523 | gcry_cipher_destroy_cb(wmem_allocator_t *allocator _U___attribute__((unused)), wmem_cb_event_t event _U___attribute__((unused)), void *user_data)
3524 | {
3525 | gcry_cipher_hd_t hd = (gcry_cipher_hd_t)user_data;
3526 |
3527 | gcry_cipher_close(hd);
3528 |
3529 | return false0;
3530 | }
3531 |
3532 | static void
3533 | ssh_decryption_setup_cipher(struct ssh_peer_data *peer_data,
3534 | ssh_bignum *iv, ssh_bignum *key)
3535 | {
3536 | gcry_error_t err;
3537 | gcry_cipher_hd_t *hd1, *hd2;
3538 |
3539 | hd1 = &peer_data->cipher;
3540 | hd2 = &peer_data->cipher_2;
3541 |
3542 | if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3543 | if (gcry_cipher_open(hd1, GCRY_CIPHER_CHACHA20, GCRY_CIPHER_MODE_STREAM, 0) ||
3544 | gcry_cipher_open(hd2, GCRY_CIPHER_CHACHA20, GCRY_CIPHER_MODE_STREAM, 0)) {
3545 | gcry_cipher_close(*hd1);
3546 | gcry_cipher_close(*hd2);
3547 | 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" , 3547, __func__, "ssh: can't open chacha20 cipher handles"); } } while (0);
3548 | return;
3549 | }
3550 |
3551 | uint8_t k1[32];
3552 | uint8_t k2[32];
3553 | if(key->data){
3554 | memcpy(k1, key->data, 32);
3555 | memcpy(k2, key->data + 32, 32);
3556 | }else{
3557 | memset(k1, 0, 32);
3558 | memset(k2, 0, 32);
3559 | }
3560 |
3561 | ssh_debug_printf("ssh: cipher is chacha20\n");
3562 | ssh_print_data("key 1", k1, 32);
3563 | ssh_print_data("key 2", k2, 32);
3564 |
3565 | if ((err = gcry_cipher_setkey(*hd1, k1, 32))) {
3566 | gcry_cipher_close(*hd1);
3567 | 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" , 3567, __func__, "ssh: can't set chacha20 cipher key %s", gcry_strerror (err)); } } while (0);
3568 | return;
3569 | }
3570 |
3571 | if ((err = gcry_cipher_setkey(*hd2, k2, 32))) {
3572 | gcry_cipher_close(*hd1);
3573 | gcry_cipher_close(*hd2);
3574 | 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" , 3574, __func__, "ssh: can't set chacha20 cipher key %s", gcry_strerror (err)); } } while (0);
3575 | return;
3576 | }
3577 |
3578 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3579 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd2);
3580 |
3581 | } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id) {
3582 | int iKeyLen = CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id?16:CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id?24:32;
3583 | 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)) {
3584 | gcry_cipher_close(*hd1);
3585 | 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" , 3585, __func__, "ssh: can't open aes%d cipher handle", iKeyLen *8); } } while (0);
3586 | return;
3587 | }
3588 | uint8_t k1[32], iv1[16];
3589 | if(key->data){
3590 | memcpy(k1, key->data, iKeyLen);
3591 | }else{
3592 | memset(k1, 0, iKeyLen);
3593 | }
3594 | if(iv->data){
3595 | memcpy(iv1, iv->data, 16);
3596 | }else{
3597 | memset(iv1, 0, 16);
3598 | }
3599 |
3600 | ssh_debug_printf("ssh: cipher is aes%d-cbc\n", iKeyLen*8);
3601 | ssh_print_data("key", k1, iKeyLen);
3602 | ssh_print_data("iv", iv1, 16);
3603 |
3604 | if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3605 | gcry_cipher_close(*hd1);
3606 | 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" , 3606, __func__, "ssh: can't set aes%d cipher key", iKeyLen* 8); } } while (0);
3607 | 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" , 3607, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3608 | return;
3609 | }
3610 |
3611 | if ((err = gcry_cipher_setiv(*hd1, iv1, 16))) {
3612 | gcry_cipher_close(*hd1);
3613 | 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" , 3613, __func__, "ssh: can't set aes%d cipher iv", iKeyLen*8 ); } } while (0);
3614 | 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" , 3614, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3615 | return;
3616 | }
3617 |
3618 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3619 |
3620 | } else if (CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id) {
3621 | int iKeyLen = CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id?16:CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id?24:32;
3622 | 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)) {
3623 | gcry_cipher_close(*hd1);
3624 | 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" , 3624, __func__, "ssh: can't open aes%d cipher handle", iKeyLen *8); } } while (0);
3625 | return;
3626 | }
3627 | uint8_t k1[32], iv1[16];
3628 | if(key->data){
3629 | memcpy(k1, key->data, iKeyLen);
3630 | }else{
3631 | memset(k1, 0, iKeyLen);
3632 | }
3633 | if(iv->data){
3634 | memcpy(iv1, iv->data, 16);
3635 | }else{
3636 | memset(iv1, 0, 16);
3637 | }
3638 |
3639 | ssh_debug_printf("ssh: cipher is aes%d-ctr\n", iKeyLen*8);
3640 | ssh_print_data("key", k1, iKeyLen);
3641 | ssh_print_data("iv", iv1, 16);
3642 |
3643 | if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3644 | gcry_cipher_close(*hd1);
3645 | 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" , 3645, __func__, "ssh: can't set aes%d cipher key", iKeyLen* 8); } } while (0);
3646 | 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" , 3646, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3647 | return;
3648 | }
3649 |
3650 | if ((err = gcry_cipher_setctr(*hd1, iv1, 16))) {
3651 | gcry_cipher_close(*hd1);
3652 | 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" , 3652, __func__, "ssh: can't set aes%d cipher iv", iKeyLen*8 ); } } while (0);
3653 | 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" , 3653, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3654 | return;
3655 | }
3656 |
3657 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3658 |
3659 | } else if (CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
3660 | int iKeyLen = CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id?16:32;
3661 | 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)) {
3662 | gcry_cipher_close(*hd1);
3663 | 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" , 3663, __func__, "ssh: can't open aes%d cipher handle", iKeyLen *8); } } while (0);
3664 | return;
3665 | }
3666 |
3667 | uint8_t k1[32], iv2[12];
3668 | if(key->data){
3669 | memcpy(k1, key->data, iKeyLen);
3670 | }else{
3671 | memset(k1, 0, iKeyLen);
3672 | }
3673 | if(iv->data){
3674 | memcpy(peer_data->iv, iv->data, 12);
3675 | }else{
3676 | memset(iv2, 0, 12);
3677 | }
3678 |
3679 | ssh_debug_printf("ssh: cipher is aes%d-gcm\n", iKeyLen*8);
3680 | ssh_print_data("key", k1, iKeyLen);
3681 | ssh_print_data("iv", peer_data->iv, 12);
3682 |
3683 | if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3684 | gcry_cipher_close(*hd1);
3685 | 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" , 3685, __func__, "ssh: can't set aes%d cipher key", iKeyLen* 8); } } while (0);
3686 | 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" , 3686, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3687 | return;
3688 | }
3689 |
3690 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3691 |
3692 | } else {
3693 | ssh_debug_printf("ssh: cipher (%d) is unknown or not set\n", peer_data->cipher_id);
3694 | }
3695 | }
3696 |
3697 | static void
3698 | ssh_decryption_setup_mac(struct ssh_peer_data *peer_data,
3699 | ssh_bignum *iv)
3700 | {
3701 | if(peer_data->mac_id == CIPHER_MAC_SHA2_2560x00020001){
3702 | if(iv->data){
3703 | memcpy(peer_data->hmac_iv, iv->data, 32);
3704 | }else{
3705 | memset(peer_data->hmac_iv, 0, 32);
3706 | }
3707 | peer_data->hmac_iv_len = 32;
3708 | ssh_debug_printf("ssh: mac is hmac-sha2-256\n");
3709 | ssh_print_data("iv", peer_data->hmac_iv, peer_data->hmac_iv_len);
3710 | }else{
3711 | ws_debug("ssh: unsupported MAC")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3711, __func__, "ssh: unsupported MAC"); } } while (0);
3712 | }
3713 | }
3714 |
3715 | /* libgcrypt wrappers for HMAC/message digest operations {{{ */
3716 | /* hmac abstraction layer */
3717 | #define SSH_HMACgcry_md_hd_t gcry_md_hd_t
3718 |
3719 | static inline int
3720 | ssh_hmac_init(SSH_HMACgcry_md_hd_t* md, const void * key, int len, int algo)
3721 | {
3722 | gcry_error_t err;
3723 | const char *err_str, *err_src;
3724 |
3725 | err = gcry_md_open(md,algo, GCRY_MD_FLAG_HMAC);
3726 | if (err != 0) {
3727 | err_str = gcry_strerror(err);
3728 | err_src = gcry_strsource(err);
3729 | ssh_debug_printf("ssh_hmac_init(): gcry_md_open failed %s/%s", err_str, err_src);
3730 | return -1;
3731 | }
3732 | err = gcry_md_setkey(*(md), key, len);
3733 | if (err != 0) {
3734 | err_str = gcry_strerror(err);
3735 | err_src = gcry_strsource(err);
3736 | ssh_debug_printf("ssh_hmac_init(): gcry_md_setkey(..., ..., %d) failed %s/%s", len, err_str, err_src);
3737 | return -1;
3738 | }
3739 | return 0;
3740 | }
3741 |
3742 | static inline void
3743 | ssh_hmac_update(SSH_HMACgcry_md_hd_t* md, const void* data, int len)
3744 | {
3745 | gcry_md_write(*(md), data, len);
3746 | }
3747 |
3748 | static inline void
3749 | ssh_hmac_final(SSH_HMACgcry_md_hd_t* md, unsigned char* data, unsigned* datalen)
3750 | {
3751 | int algo;
3752 | unsigned len;
3753 |
3754 | algo = gcry_md_get_algo (*(md));
3755 | len = gcry_md_get_algo_dlen(algo);
3756 | DISSECTOR_ASSERT(len <= *datalen)((void) ((len <= *datalen) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c" , 3756, "len <= *datalen"))));
3757 | memcpy(data, gcry_md_read(*(md), algo), len);
3758 | *datalen = len;
3759 | }
3760 |
3761 | static inline void
3762 | ssh_hmac_cleanup(SSH_HMACgcry_md_hd_t* md)
3763 | {
3764 | gcry_md_close(*(md));
3765 | }
3766 | /* libgcrypt wrappers for HMAC/message digest operations }}} */
3767 |
3768 | /* Decryption integrity check {{{ */
3769 |
3770 | static int
3771 | ssh_get_digest_by_id(unsigned mac_id)
3772 | {
3773 | if(mac_id==CIPHER_MAC_SHA2_2560x00020001){
3774 | return GCRY_MD_SHA256;
3775 | }
3776 | return -1;
3777 | }
3778 |
3779 | static void
3780 | ssh_calc_mac(struct ssh_peer_data *peer_data, uint32_t seqnr, uint8_t* data, uint32_t datalen, uint8_t* calc_mac)
3781 | {
3782 | SSH_HMACgcry_md_hd_t hm;
3783 | int md;
3784 | uint32_t len;
3785 | uint8_t buf[DIGEST_MAX_SIZE48];
3786 |
3787 | md=ssh_get_digest_by_id(peer_data->mac_id);
3788 | // ssl_debug_printf("ssh_check_mac mac type:%s md %d\n",
3789 | // ssl_cipher_suite_dig(decoder->cipher_suite)->name, md);
3790 |
3791 | memset(calc_mac, 0, DIGEST_MAX_SIZE48);
3792 |
3793 | if (md == -1) {
3794 | return;
3795 | }
3796 | if (ssh_hmac_init(&hm, peer_data->hmac_iv, peer_data->hmac_iv_len, md) != 0)
3797 | return;
3798 |
3799 | /* hash sequence number */
3800 | phtonu32(buf, seqnr);
3801 |
3802 | ssh_print_data("Mac IV", peer_data->hmac_iv, peer_data->hmac_iv_len);
3803 | ssh_print_data("Mac seq", buf, 4);
3804 | ssh_print_data("Mac data", data, datalen);
3805 |
3806 | ssh_hmac_update(&hm,buf,4);
3807 |
3808 | ssh_hmac_update(&hm,data,datalen);
3809 |
3810 | /* get digest and digest len*/
3811 | len = sizeof(buf);
3812 | ssh_hmac_final(&hm,buf,&len);
3813 | ssh_hmac_cleanup(&hm);
3814 | ssh_print_data("Mac", buf, len);
3815 | memcpy(calc_mac, buf, len);
3816 |
3817 | return;
3818 | }
3819 | /* Decryption integrity check }}} */
3820 |
3821 | static ssh_packet_info_t *
3822 | ssh_get_packet_info(packet_info *pinfo, bool_Bool is_response)
3823 | {
3824 | ssh_packet_info_t *packet = (ssh_packet_info_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_ssh, 0);
3825 | if(!packet){
3826 | packet = wmem_new0(wmem_file_scope(), ssh_packet_info_t)((ssh_packet_info_t*)wmem_alloc0((wmem_file_scope()), sizeof( ssh_packet_info_t)));
3827 | packet->from_server = is_response;
3828 | packet->messages = NULL((void*)0);
3829 | p_add_proto_data(wmem_file_scope(), pinfo, proto_ssh, 0, packet);
3830 | }
3831 | return packet;
3832 | }
3833 |
3834 | static unsigned
3835 | ssh_decrypt_packet(tvbuff_t *tvb, packet_info *pinfo,
3836 | struct ssh_peer_data *peer_data, int offset)
3837 | {
3838 | bool_Bool is_response = ssh_peer_data_from_server(peer_data);
3839 |
3840 | gcry_error_t err;
3841 | unsigned message_length = 0, seqnr;
3842 | uint8_t *plain = NULL((void*)0);
3843 | const uint8_t *mac;
3844 | unsigned mac_len, data_len = 0;
3845 | uint8_t calc_mac[DIGEST_MAX_SIZE48];
3846 | memset(calc_mac, 0, DIGEST_MAX_SIZE48);
3847 | unsigned remaining = tvb_captured_length_remaining(tvb, offset);
3848 |
3849 | mac_len = peer_data->mac_length > 0 ? peer_data->mac_length : 0;
3850 | seqnr = peer_data->sequence_number;
3851 |
3852 | /* General algorithm:
3853 | * 1. If there are not enough bytes for the packet_length, and we can
3854 | * do reassembly, ask for one more segment.
3855 | * 2. Retrieve packet_length (encrypted in some modes).
3856 | * 3. Sanity check packet_length (the field is 4 bytes, but packet_length
3857 | * is unlikely to be much larger than 32768, which provides good indication
3858 | * a packet is continuation data or, in some modes, failed decryption.
3859 | * https://www.rfc-editor.org/rfc/rfc4253.html#section-6.1 )
3860 | * 4. If there are not enough bytes for packet_length, and we can do
3861 | * reassembly, tell the TCP dissector how many more bytes we need.
3862 | * 5. If the packet is truncated and we cannot reassemble, at this
3863 | * point we conclude that it is the next SSH packet, and advance the
3864 | * sequence number, invocation_counter, etc. before throwing an exception.
3865 | * 6. If we do have all the data, we decrypt and check the MAC before
3866 | * doing all that. (XXX - Advancing seqnr regardless could make sense
3867 | * in some ciphers.)
3868 | * 7. Possibly the MAC should be checked before decryption in some ciphers
3869 | * if we have all the data; possibly there should be a "do not check the
3870 | * MAC" preference a la TLS.
3871 | */
3872 |
3873 | if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3874 | if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
3875 | /* Can do reassembly, and the packet length is split across
3876 | * segment boundaries. */
3877 | pinfo->desegment_offset = offset;
3878 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
3879 | return tvb_captured_length(tvb);
3880 | }
3881 |
3882 | const uint8_t *ctext = tvb_get_ptr(tvb, offset, 4);
3883 | uint8_t plain_length_buf[4];
3884 |
3885 | if (!ssh_decrypt_chacha20(peer_data->cipher_2, seqnr, 0, ctext, 4,
3886 | plain_length_buf, 4)) {
3887 | ws_debug("ERROR: could not decrypt packet len")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3887, __func__, "ERROR: could not decrypt packet len"); } } while (0);
3888 | return tvb_captured_length(tvb);
3889 | }
3890 |
3891 | message_length = pntohu32(plain_length_buf);
3892 |
3893 | ssh_debug_printf("chachapoly_crypt seqnr=%d [%u]\n", seqnr, message_length);
3894 |
3895 | ssh_debug_printf("%s plain for seq = %d len = %u\n", is_response?"s2c":"c2s", seqnr, message_length);
3896 | if (message_length > SSH_MAX_PACKET_LEN32768) {
3897 | 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" , 3897, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
3898 | return tvb_captured_length(tvb);
3899 | }
3900 | if (remaining < message_length + 4 + mac_len) {
3901 | // Need desegmentation; as "the chacha20-poly1305@openssh.com AEAD
3902 | // uses the sequence number as an initialisation vector (IV) to
3903 | // generate its per-packet MAC key and is otherwise stateless
3904 | // between packets," we need no special handling here.
3905 | // https://www.ietf.org/id/draft-miller-sshm-strict-kex-01.html
3906 | //
3907 | if (ssh_desegment && pinfo->can_desegment) {
3908 | pinfo->desegment_offset = offset;
3909 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
3910 | return tvb_captured_length(tvb);
3911 | }
3912 | // If we can't desegment, we will have an exception below in
3913 | // the tvb_get_ptr. Advance the sequence number so that the
3914 | // next SSH packet start will decrypt correctly.
3915 | peer_data->sequence_number++;
3916 | }
3917 |
3918 | plain = (uint8_t *)wmem_alloc0(pinfo->pool, message_length+4);
3919 | memcpy(plain, plain_length_buf, 4);
3920 | const uint8_t *ctext2 = tvb_get_ptr(tvb, offset+4, message_length);
3921 |
3922 | /* XXX - "Once the entire packet has been received, the MAC MUST be
3923 | * checked before decryption," but we decrypt first.
3924 | * https://datatracker.ietf.org/doc/html/draft-ietf-sshm-chacha20-poly1305-01
3925 | */
3926 | if (!ssh_decrypt_chacha20(peer_data->cipher, seqnr, 1, ctext2,
3927 | message_length, plain+4, message_length)) {
3928 | ws_debug("ERROR: could not decrypt packet payload")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3928, __func__, "ERROR: could not decrypt packet payload"); } } while (0);
3929 | return tvb_captured_length(tvb);
3930 | }
3931 |
3932 | mac = tvb_get_ptr(tvb, offset + 4 + message_length, mac_len);
3933 | uint8_t poly_key[32], iv[16];
3934 |
3935 | memset(poly_key, 0, 32);
3936 | memset(iv, 0, 8);
3937 | phtonu64(iv+8, (uint64_t)seqnr);
3938 | gcry_cipher_setiv(peer_data->cipher, iv, mac_len);
3939 | gcry_cipher_encrypt(peer_data->cipher, poly_key, 32, poly_key, 32);
3940 |
3941 | gcry_mac_hd_t mac_hd;
3942 | gcry_mac_open(&mac_hd, GCRY_MAC_POLY1305, 0, NULL((void*)0));
3943 | gcry_mac_setkey(mac_hd, poly_key, 32);
3944 | gcry_mac_write(mac_hd, ctext, 4);
3945 | gcry_mac_write(mac_hd, ctext2, message_length);
3946 | if (gcry_mac_verify(mac_hd, mac, mac_len)) {
3947 | ws_debug("ssh: MAC does not match")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3947, __func__, "ssh: MAC does not match"); } } while (0);
3948 | }
3949 | size_t buflen = DIGEST_MAX_SIZE48;
3950 | gcry_mac_read(mac_hd, calc_mac, &buflen);
3951 | gcry_mac_close(mac_hd);
3952 |
3953 | data_len = message_length + 4;
3954 |
3955 | ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
3956 | ssh_print_data("", plain, message_length+4);
3957 | } else if (CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
3958 |
3959 | /* AES GCM for Secure Shell [RFC 5647] */
3960 | /* The message length is Additional Authenticated Data */
3961 | if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
3962 | /* Can do reassembly, and the packet length is split across
3963 | * segment boundaries. */
3964 | pinfo->desegment_offset = offset;
3965 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
3966 | return tvb_captured_length(tvb);
3967 | }
3968 | message_length = tvb_get_uint32(tvb, offset, ENC_BIG_ENDIAN0x00000000);
3969 | ssh_debug_printf("length: %d, remaining: %d\n", message_length, remaining);
3970 | /* The minimum size of a packet (not counting mac) is 16. */
3971 | if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 16) {
3972 | 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" , 3972, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
3973 | return tvb_captured_length(tvb);
3974 | }
3975 |
3976 | /* SSH requires that the data to be encrypted (not including the AAD,
3977 | * so message_length) be a multiple of the block size, 16 octets */
3978 | if (message_length % 16 != 0) {
3979 | ssh_debug_printf("length not a multiple of block length (16)!\n");
3980 | }
3981 |
3982 | if (message_length + 4 + mac_len > remaining) {
3983 | // Need desegmentation; as the message length was unencrypted
3984 | // AAD, we need no special handling here.
3985 | if (pinfo->can_desegment) {
3986 | pinfo->desegment_offset = offset;
3987 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
3988 | return tvb_captured_length(tvb);
3989 | }
3990 | // If we can't desegment, we will have an exception below in
3991 | // the tvb_get_ptr. Advance the sequence number (less crucial
3992 | // than with ChaCha20, as it's not an input.)
3993 | peer_data->sequence_number++;
3994 | }
3995 |
3996 | /* Set the IV and increment the invocation_counter for the next
3997 | * packet. Do this before retrieving the ciphertext with tvb_get_ptr
3998 | * in case this packet is truncated.
3999 | */
4000 | if ((err = gcry_cipher_setiv(peer_data->cipher, peer_data->iv, 12))) {
4001 | //gcry_cipher_close(peer_data->cipher);
4002 | //Don't close this unless we also remove the wmem callback
4003 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4004 | #ifndef _WIN32
4005 | 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" , 4005, __func__, "ssh: can't set aes128 cipher iv"); } } while (0);
4006 | 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" , 4006, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
4007 | #endif //ndef _WIN32
4008 | return tvb_captured_length(tvb);
4009 | }
4010 | // Increment invocation_counter for next packet
4011 | int idx = 12;
4012 | do{
4013 | idx -= 1;
4014 | peer_data->iv[idx] += 1;
4015 | }while(idx>4 && peer_data->iv[idx]==0);
4016 |
4017 | const char *ctext = (const char *)tvb_get_ptr(tvb, offset + 4,
4018 | message_length);
4019 | plain = (uint8_t *)wmem_alloc(pinfo->pool, message_length+4);
4020 | phtonu32(plain, message_length);
4021 |
4022 | if ((err = gcry_cipher_authenticate(peer_data->cipher, plain, 4))) {
4023 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4024 | #ifndef _WIN32
4025 | 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" , 4025, __func__, "can't authenticate using aes128-gcm: %s\n" , gpg_strerror(err)); } } while (0);
4026 | #endif //ndef _WIN32
4027 | return tvb_captured_length(tvb);
4028 | }
4029 |
4030 | if ((err = gcry_cipher_decrypt(peer_data->cipher, plain+4, message_length,
4031 | ctext, message_length))) {
4032 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4033 | #ifndef _WIN32
4034 | 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" , 4034, __func__, "can't decrypt aes-gcm %d %s %s", gcry_err_code (err), gcry_strsource(err), gcry_strerror(err)); } } while (0 );
4035 |
4036 | #endif //ndef _WIN32
4037 | return tvb_captured_length(tvb);
4038 | }
4039 |
4040 | if (gcry_cipher_gettag (peer_data->cipher, calc_mac, 16)) {
4041 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4042 | #ifndef _WIN32
4043 | 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" , 4043, __func__, "aes128-gcm, gcry_cipher_gettag() failed\n" ); } } while (0);
4044 | #endif //ndef _WIN32
4045 | return tvb_captured_length(tvb);
4046 | }
4047 |
4048 | if ((err = gcry_cipher_reset(peer_data->cipher)gcry_cipher_ctl ((peer_data->cipher), GCRYCTL_RESET, ((void *)0), 0))) {
4049 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4050 | #ifndef _WIN32
4051 | 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" , 4051, __func__, "aes-gcm, gcry_cipher_reset failed: %s\n", gpg_strerror (err)); } } while (0);
4052 | #endif //ndef _WIN32
4053 | return tvb_captured_length(tvb);
4054 | }
4055 |
4056 | data_len = message_length + 4;
4057 |
4058 | ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
4059 | ssh_print_data("", plain, message_length+4);
4060 |
4061 | } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id ||
4062 | CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id ||
4063 | CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id) {
4064 |
4065 | 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" , 4065, __func__, "Getting raw bytes of length %d", tvb_reported_length_remaining (tvb, offset)); } } while (0);
4066 | /* In CBC and CTR mode, the message length is encrypted as well.
4067 | * We need to decrypt one block, 16 octets, to get the length.
4068 | */
4069 | if (ssh_desegment && pinfo->can_desegment && remaining < 16) {
4070 | /* Can do reassembly, and the packet length is split across
4071 | * segment boundaries. */
4072 | pinfo->desegment_offset = offset;
4073 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4074 | return tvb_captured_length(tvb);
4075 | }
4076 | /* Do we already have the first block decrypted from when the packet
4077 | * was too large and segmented?
4078 | */
4079 | if (!peer_data->plain0_valid) {
4080 | const char *cypher_buf0 = (const char *)tvb_get_ptr(tvb, offset, 16);
4081 |
4082 | if (gcry_cipher_decrypt(peer_data->cipher, peer_data->plain0, 16, cypher_buf0, 16))
4083 | {
4084 | ws_debug("can\'t decrypt aes128")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4084, __func__, "can\'t decrypt aes128"); } } while (0);
4085 | return tvb_captured_length(tvb);
4086 | }
4087 | }
4088 |
4089 | message_length = pntohu32(peer_data->plain0);
4090 |
4091 | /* The message_length value doesn't include the length of the
4092 | * message_length field itself, so it must be at least 12 bytes.
4093 | */
4094 | if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 12){
4095 | 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" , 4095, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
4096 | return tvb_captured_length(tvb);
4097 | }
4098 |
4099 | /* SSH requires that the data to be encrypted (message_length+4)
4100 | * be a multiple of the block size, 16 octets. */
4101 | if (message_length % 16 != 12) {
4102 | ssh_debug_printf("total length not a multiple of block length (16)!\n");
4103 | }
4104 | if (remaining < message_length + 4 + mac_len) {
4105 | /* Need desegmentation
4106 | *
4107 | * We will be handed the full encrypted packet again. We can either
4108 | * store the decrypted first block, or will need to reset the CTR
4109 | * or IV appropriately before decrypting the first block again.
4110 | * libgcrypt does not provide an easy way to get the current value
4111 | * of the CTR or (or IV/last block for CBC), so we just store the
4112 | * decrypted first block.
4113 | */
4114 | if (ssh_desegment && pinfo->can_desegment) {
4115 | 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" , 4116, __func__, " need_desegmentation: offset = %d, reported_length_remaining = %d\n" , offset, tvb_reported_length_remaining(tvb, offset)); } } while (0)
4116 | offset, tvb_reported_length_remaining(tvb, offset))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 4116, __func__, " need_desegmentation: offset = %d, reported_length_remaining = %d\n" , offset, tvb_reported_length_remaining(tvb, offset)); } } while (0);
4117 | peer_data->plain0_valid = true1;
4118 | pinfo->desegment_offset = offset;
4119 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4120 | return tvb_captured_length(tvb);
4121 | } else {
4122 | // If we can't desegment, we will have an exception below in
4123 | // the tvb_get_ptr. Advance the sequence number so that the
4124 | // the hash will work for the next packet.
4125 | //
4126 | // XXX - In CTR mode, we should advance the CTR based on the
4127 | // known length so we can dissect the next block. We would
4128 | // also need to reset the CTR after failing to dissect a
4129 | // packet_length on the continuation data that comes next.
4130 | peer_data->sequence_number++;
4131 | }
4132 | }
4133 | peer_data->plain0_valid = false0;
4134 | plain = (uint8_t *)wmem_alloc(pinfo->pool, message_length+4);
4135 | memcpy(plain, peer_data->plain0, 16);
4136 |
4137 | if (message_length > 12) {
4138 | /* All of these functions actually do handle the case where
4139 | * there is no data left, so the check is unnecessary.
4140 | */
4141 | char *ct = (char *)tvb_get_ptr(tvb, offset + 16, message_length - 12);
4142 | if ((err = gcry_cipher_decrypt(peer_data->cipher, plain + 16, message_length - 12, ct, message_length - 12)))
4143 | {
4144 | 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" , 4144, __func__, "can't decrypt aes-cbc/ctr %d %s %s", gcry_err_code (err), gcry_strsource(err), gcry_strerror(err)); } } while (0 );
4145 | return tvb_captured_length(tvb);
4146 | }
4147 | }
4148 |
4149 | ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
4150 | ssh_print_data("", plain, message_length+4);
4151 |
4152 | data_len = message_length + 4;
4153 |
4154 | // XXX - In -etm modes, should calculate MAC based on ciphertext.
4155 | ssh_calc_mac(peer_data, seqnr, plain, data_len, calc_mac);
4156 | } else if (CIPHER_NULL0x00080000 == peer_data->cipher_id) {
4157 | if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
4158 | /* Can do reassembly, and the packet length is split across
4159 | * segment boundaries. */
4160 | pinfo->desegment_offset = offset;
4161 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4162 | return tvb_captured_length(tvb);
4163 | }
4164 | message_length = tvb_get_uint32(tvb, offset, ENC_BIG_ENDIAN0x00000000);
4165 | ssh_debug_printf("length: %d, remaining: %d\n", message_length, remaining);
4166 | if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 8) {
4167 | 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" , 4167, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
4168 | return tvb_captured_length(tvb);
4169 | }
4170 |
4171 | if (message_length + 4 + mac_len > remaining) {
4172 | // Need desegmentation; as the message length was unencrypted
4173 | // AAD, we need no special handling here.
4174 | if (pinfo->can_desegment) {
4175 | pinfo->desegment_offset = offset;
4176 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4177 | return tvb_captured_length(tvb);
4178 | }
4179 | // If we can't desegment, we will have an exception below in
4180 | // the tvb_memdup. Advance the sequence number (not crucial).
4181 | peer_data->sequence_number++;
4182 | }
4183 | data_len = message_length + 4;
4184 | plain = tvb_memdup(pinfo->pool, tvb, offset, data_len);
4185 |
4186 | // XXX - In -etm modes, should calculate MAC based on ciphertext.
4187 | ssh_calc_mac(peer_data, seqnr, plain, data_len, calc_mac);
4188 | }
4189 |
4190 | if (mac_len && data_len) {
4191 | mac = tvb_get_ptr(tvb, offset + data_len, mac_len);
4192 | if (!memcmp(mac, calc_mac, mac_len)){
4193 | ws_noisy("MAC OK")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 4193, __func__, "MAC OK"); } } while (0);
4194 | }else{
4195 | ws_debug("MAC ERR")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4195, __func__, "MAC ERR"); } } while (0);
4196 | /* Bad MAC, just show the packet as encrypted. We can get
4197 | * this for a known encryption type with no keys currently. */
4198 | if (!ssh_ignore_mac_failed) {
4199 | return tvb_captured_length(tvb);
4200 | }
4201 | }
4202 | }
4203 |
4204 | if(plain){
4205 | // Save message
4206 |
4207 | ssh_packet_info_t *packet = ssh_get_packet_info(pinfo, is_response);
4208 |
4209 | int record_id = tvb_raw_offset(tvb)+offset;
4210 | ssh_message_info_t *message;
4211 |
4212 | message = wmem_new(wmem_file_scope(), ssh_message_info_t)((ssh_message_info_t*)wmem_alloc((wmem_file_scope()), sizeof( ssh_message_info_t)));
4213 | message->sequence_number = peer_data->sequence_number++;
4214 | message->plain_data = wmem_memdup(wmem_file_scope(), plain, data_len);
4215 | message->data_len = data_len;
4216 | message->id = record_id;
4217 | message->next = NULL((void*)0);
4218 | memcpy(message->calc_mac, calc_mac, DIGEST_MAX_SIZE48);
4219 | ssh_debug_printf("%s->sequence_number++ > %d\n", is_response?"server":"client", peer_data->sequence_number);
4220 |
4221 | ssh_message_info_t **pmessage = &packet->messages;
4222 | while(*pmessage){
4223 | pmessage = &(*pmessage)->next;
4224 | }
4225 | *pmessage = message;
4226 | }
4227 |
4228 | offset += message_length + mac_len + 4;
4229 | return offset;
4230 | }
4231 |
4232 | static bool_Bool
4233 | ssh_decrypt_chacha20(gcry_cipher_hd_t hd,
4234 | uint32_t seqnr, uint32_t counter, const unsigned char *ctext, unsigned ctext_len,
4235 | unsigned char *plain, unsigned plain_len)
4236 | {
4237 | unsigned char seq[8];
4238 | unsigned char iv[16];
4239 |
4240 | phtonu64(seq, (uint64_t)seqnr);
4241 |
4242 | // chacha20 uses a different cipher handle for the packet payload & length
4243 | // the payload uses a block counter
4244 | if (counter) {
4245 | unsigned char ctr[8] = {1,0,0,0,0,0,0,0};
4246 | memcpy(iv, ctr, 8);
4247 | memcpy(iv+8, seq, 8);
4248 | }
4249 |
4250 | return ((!counter && gcry_cipher_setiv(hd, seq, 8) == 0) ||
4251 | (counter && gcry_cipher_setiv(hd, iv, 16) == 0)) &&
4252 | gcry_cipher_decrypt(hd, plain, plain_len, ctext, ctext_len) == 0;
4253 | }
4254 |
4255 | static int
4256 | ssh_dissect_decrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
4257 | struct ssh_peer_data *peer_data, proto_tree *tree,
4258 | ssh_message_info_t *message)
4259 | {
4260 | int offset = 0; // TODO:
4261 | int dissected_len = 0;
4262 | tvbuff_t* payload_tvb;
4263 |
4264 | const uint8_t* plaintext = message->plain_data;
4265 | unsigned plaintext_len = message->data_len;
4266 |
4267 | col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Encrypted packet (plaintext_len=%d)", plaintext_len);
4268 |
4269 | tvbuff_t *packet_tvb = tvb_new_child_real_data(tvb, plaintext, plaintext_len, plaintext_len);
4270 | add_new_data_source(pinfo, packet_tvb, "Decrypted Packet");
4271 |
4272 | unsigned plen;
4273 | uint32_t padding_length;
4274 | unsigned remain_length;
4275 | unsigned msg_code;
4276 |
4277 | proto_item *ti, *padding_ti;
4278 | proto_item *msg_type_tree = NULL((void*)0);
4279 |
4280 | /*
4281 | * We use "tvb_ensure_captured_length_remaining()" to make sure there
4282 | * actually *is* data remaining.
4283 | *
4284 | * This means we're guaranteed that "remain_length" is positive.
4285 | */
4286 | remain_length = tvb_ensure_captured_length_remaining(packet_tvb, offset);
4287 | /*
4288 | * Can we do reassembly?
4289 | */
4290 | if (ssh_desegment && pinfo->can_desegment) {
4291 | /*
4292 | * Yes - would an SSH header starting at this offset
4293 | * be split across segment boundaries?
4294 | */
4295 | if (remain_length < 4) {
4296 | /*
4297 | * Yes. Tell the TCP dissector where the data for
4298 | * this message starts in the data it handed us and
4299 | * that we need "some more data." Don't tell it
4300 | * exactly how many bytes we need because if/when we
4301 | * ask for even more (after the header) that will
4302 | * break reassembly.
4303 | */
4304 | pinfo->desegment_offset = offset;
4305 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4306 | return offset;
4307 | }
4308 | }
4309 | /* XXX - Defragmentation needs to be done in ssh_decrypt_packet, and the
4310 | * checks there should mean that the above never has an effect. (It's
4311 | * copied from ssh_dissect_key_exchange.)
4312 | */
4313 | plen = tvb_get_ntohl(packet_tvb, offset);
4314 |
4315 | if (ssh_desegment && pinfo->can_desegment) {
4316 | if (plen + 4 > remain_length) {
4317 | pinfo->desegment_offset = offset;
4318 | pinfo->desegment_len = plen+4 - remain_length;
4319 | return offset;
4320 | }
4321 | }
4322 | /*
4323 | * Need to check plen > 0x80000000 here
4324 | */
4325 |
4326 | ti = proto_tree_add_uint(tree, hf_ssh_packet_length, packet_tvb,
4327 | offset, 4, plen);
4328 | if (plen < 8) {
4329 | /* RFC 4253 6: "[T]he length of the concatenation of 'packet_length',
4330 | * 'padding_length', 'payload', and 'random padding' MUST be a multiple
4331 | * of the cipher block size or 8, whichever is larger,... even when
4332 | * using stream ciphers."
4333 | *
4334 | * Modes that do not encrypt plen with the same key as the other three
4335 | * cannot follow this as written and delete 'packet_length' from the
4336 | * above sentence. As padding_length is one byte and random_padding at
4337 | * least four, packet_length must be at least 8 in all modes.
4338 | */
4339 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Packet length is %d, MUST be at least 8", plen);
4340 | } else if (plen >= SSH_MAX_PACKET_LEN32768) {
4341 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Overly large number %d", plen);
4342 | plen = remain_length-4;
4343 | }
4344 | offset+=4;
4345 |
4346 | /* padding length */
4347 | padding_ti = proto_tree_add_item_ret_uint(tree, hf_ssh_padding_length, packet_tvb, offset, 1, ENC_NA0x00000000, &padding_length);
4348 | /* RFC 4253 6: "There MUST be at least four bytes of padding." */
4349 | if (padding_length < 4) {
4350 | expert_add_info_format(pinfo, padding_ti, &ei_ssh_padding_length, "Padding length is %d, MUST be at least 4", padding_length);
4351 | }
4352 | unsigned payload_length;
4353 | if (ckd_sub(&payload_length, plen, padding_length + 1)__builtin_sub_overflow((plen), (padding_length + 1), (&payload_length ))) {
4354 | expert_add_info_format(pinfo, padding_ti, &ei_ssh_padding_length, "Padding length is too large [%d], implies a negative payload length", padding_length);
4355 | payload_length = 0;
4356 | }
4357 | offset += 1;
4358 |
4359 | /* msg_code */
4360 | msg_code = tvb_get_uint8(packet_tvb, offset);
4361 | /* XXX - Payload compression could have been negotiated */
4362 | payload_tvb = tvb_new_subset_length(packet_tvb, offset, (int)payload_length);
4363 | bool_Bool is_response = ssh_peer_data_from_server(peer_data);
4364 |
4365 | /* Transport layer protocol */
4366 | /* Generic (1-19) */
4367 | if(msg_code >= 1 && msg_code <= 19) {
4368 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4369 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Transport (generic)");
4370 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4371 | dissected_len = ssh_dissect_transport_generic(payload_tvb, pinfo, 1, peer_data, msg_type_tree, msg_code);
4372 | }
4373 | /* Algorithm negotiation (20-29) */
4374 | /* Normally these messages are all dissected in ssh_dissect_key_exchange */
4375 | else if(msg_code >=20 && msg_code <= 29) {
4376 | //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);
4377 |
4378 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4379 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Transport (algorithm negotiation)");
4380 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4381 | dissected_len = 1;
4382 |
4383 | 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" , 4383, __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);
4384 | switch(msg_code)
4385 | {
4386 | case SSH_MSG_KEXINIT20:
4387 | {
4388 | 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" , 4388, __func__, "ssh: REKEY msg_code 20: storing frame %u number, offset %d" , pinfo->num, offset); } } while (0);
4389 | peer_data->rekey_trigger_frame = pinfo->num;
4390 | // Reset array while REKEY: sanitize server_key_exchange_init and force do_decrypt :
4391 | peer_data->global_data->kex_server_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
4392 | peer_data->global_data->do_decrypt = true1;
4393 | dissected_len = ssh_dissect_key_init(payload_tvb, pinfo, offset - 4, msg_type_tree, is_response, peer_data->global_data);
4394 | break;
4395 | }
4396 | case SSH_MSG_NEWKEYS21:
4397 | {
4398 | if (peer_data->rekey_pending) {
4399 | 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" , 4399, __func__, "ssh: REKEY pending... NEWKEYS frame %u", pinfo ->num); } } while (0);
4400 | 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" , 4400, __func__, "ssh: decrypting frame %u with key ID %u, seq=%u" , pinfo->num, peer_data->cipher_id, peer_data->sequence_number ); } } while (0);
4401 | if (peer_data->global_data->ext_kex_strict) {
4402 | peer_data->sequence_number = 0;
4403 | ssh_debug_printf("%s->sequence_number reset to 0 (Strict KEX)\n", is_response ? "server" : "client");
4404 | 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" , 4404, __func__, "ssh: REKEY reset %s sequence number to 0 at frame %u (Strict KEX)" , is_response ? "server" : "client", pinfo->num); } } while (0);
4405 | }
4406 | // finalize the rekey (activate the new keys)
4407 | if (!is_response) { // Only process client-sent NEWKEYS
4408 | // Activate new key material into peer_data->cipher
4409 | ssh_debug_printf("Activating new keys for CLIENT => SERVER\n");
4410 | ssh_decryption_setup_cipher(peer_data, &peer_data->global_data->new_keys[0], &peer_data->global_data->new_keys[2]);
4411 | ssh_decryption_setup_mac(peer_data, &peer_data->global_data->new_keys[4]);
4412 | } else { // Only process server-sent NEWKEYS
4413 | // Activate new key material into peer_data->cipher
4414 | ssh_debug_printf("Activating new keys for SERVER => CLIENT\n");
4415 | ssh_decryption_setup_cipher(peer_data, &peer_data->global_data->new_keys[1], &peer_data->global_data->new_keys[3]);
4416 | ssh_decryption_setup_mac(peer_data, &peer_data->global_data->new_keys[5]);
4417 | }
4418 | // Finishing REKEY
4419 | peer_data->rekey_pending = false0;
4420 | 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" , 4420, __func__, "ssh: REKEY done... switched to NEWKEYS at frame %u" , pinfo->num); } } while (0);
4421 | }
4422 | break;
4423 | }
4424 | }
4425 | }
4426 | /* Key exchange method specific (reusable) (30-49) */
4427 | /* Normally these messages are all dissected in ssh_dissect_key_exchange */
4428 | else if (msg_code >=30 && msg_code <= 49) {
4429 | //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);
4430 |
4431 | 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)");
4432 | 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" , 4432, __func__, "ssh: rekey KEX_xxx_INIT/KEX_xxx_REPLY detected in frame %u" , pinfo->num); } } while (0);
4433 | peer_data->rekey_pending = true1;
4434 | dissected_len = peer_data->global_data->kex_specific_dissector(msg_code, payload_tvb, pinfo, offset -5, msg_type_tree, peer_data->global_data);
4435 | }
4436 |
4437 | /* User authentication protocol */
4438 | /* Generic (50-59) */
4439 | else if (msg_code >= 50 && msg_code <= 59) {
4440 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4441 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: User Authentication (generic)");
4442 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4443 | dissected_len = ssh_dissect_userauth_generic(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4444 | }
4445 | /* User authentication method specific (reusable) (60-79) */
4446 | else if (msg_code >= 60 && msg_code <= 79) {
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: User Authentication: (method specific)");
4449 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4450 | dissected_len = ssh_dissect_userauth_specific(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4451 | }
4452 |
4453 | /* Connection protocol */
4454 | /* Generic (80-89) */
4455 | else if (msg_code >= 80 && msg_code <= 89) {
4456 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4457 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Connection (generic)");
4458 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4459 | dissected_len = ssh_dissect_connection_generic(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4460 | }
4461 | /* Channel related messages (90-127) */
4462 | else if (msg_code >= 90 && msg_code <= 127) {
4463 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4464 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Connection: (channel related message)");
4465 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4466 | dissected_len = ssh_dissect_connection_specific(payload_tvb, pinfo, peer_data, 1, msg_type_tree, msg_code, message);
4467 | }
4468 |
4469 | /* Reserved for client protocols (128-191) */
4470 | else if (msg_code >= 128 && msg_code <= 191) {
4471 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4472 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Client protocol");
4473 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4474 | offset+=1;
4475 | // TODO: dissected_len = ssh_dissect_client(payload_tvb, pinfo, global_data, 1, msg_type_tree, is_response, msg_code);
4476 | }
4477 |
4478 | /* Local extensions (192-255) */
4479 | else if (msg_code >= 192 && msg_code <= 255) {
4480 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Local extension");
4481 | dissected_len = ssh_dissect_local_extension(payload_tvb, pinfo, 0, peer_data, msg_type_tree, msg_code);
4482 | }
4483 |
4484 | /* XXX - ssh_dissect_key_exchange only adds undecoded payload here,
4485 | * i.e., tvb_reported_length_remaining(payload_tvb, dissected_len)
4486 | */
4487 | if (payload_length > 0) {
4488 | proto_tree_add_item(msg_type_tree, hf_ssh_payload, packet_tvb, offset, payload_length, ENC_NA0x00000000);
4489 | }
4490 | if(dissected_len!=(int)payload_length){
4491 | 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);
4492 | }
4493 | offset += payload_length;
4494 |
4495 | /* padding */
4496 | proto_tree_add_item(tree, hf_ssh_padding_string, packet_tvb, offset, padding_length, ENC_NA0x00000000);
4497 | offset += padding_length;
4498 |
4499 | if (peer_data->mac_length > 0) {
4500 | 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);
4501 | offset += peer_data->mac_length;
4502 | }
4503 | ti = proto_tree_add_uint(tree, hf_ssh_seq_num, tvb, offset, 0, message->sequence_number);
4504 | proto_item_set_generated(ti);
4505 | return offset;
4506 | }
4507 |
4508 | static int
4509 | ssh_dissect_transport_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
4510 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code)
4511 | {
4512 | (void)pinfo;
4513 | if(msg_code==SSH_MSG_DISCONNECT1){
4514 | proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_reason, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4515 | offset += 4;
4516 | unsigned nlen;
4517 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4518 | proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_description_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4519 | offset += 4;
4520 | proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_description, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4521 | offset += nlen;
4522 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4523 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4524 | offset += 4;
4525 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4526 | offset += nlen;
4527 | }else if(msg_code==SSH_MSG_IGNORE2){
4528 | offset += ssh_tree_add_string(packet_tvb, offset, msg_type_tree, hf_ssh_ignore_data, hf_ssh_ignore_data_length);
4529 | }else if(msg_code==SSH_MSG_DEBUG4){
4530 | unsigned slen;
4531 | proto_tree_add_item(msg_type_tree, hf_ssh_debug_always_display, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4532 | offset += 1;
4533 | slen = tvb_get_ntohl(packet_tvb, offset) ;
4534 | proto_tree_add_item(msg_type_tree, hf_ssh_debug_message_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4535 | offset += 4;
4536 | proto_tree_add_item(msg_type_tree, hf_ssh_debug_message, packet_tvb, offset, slen, ENC_UTF_80x00000002);
4537 | offset += slen;
4538 | slen = tvb_get_ntohl(packet_tvb, offset) ;
4539 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4540 | offset += 4;
4541 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4542 | offset += slen;
4543 | }else if(msg_code==SSH_MSG_SERVICE_REQUEST5){
4544 | unsigned nlen;
4545 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4546 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4547 | offset += 4;
4548 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4549 | offset += nlen;
4550 | }else if(msg_code==SSH_MSG_SERVICE_ACCEPT6){
4551 | unsigned nlen;
4552 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4553 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4554 | offset += 4;
4555 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4556 | offset += nlen;
4557 | }else if(msg_code==SSH_MSG_EXT_INFO7){
4558 | unsigned ext_cnt;
4559 | ext_cnt = tvb_get_ntohl(packet_tvb, offset);
4560 | proto_tree_add_item(msg_type_tree, hf_ssh_ext_count, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4561 | offset += 4;
4562 | for(unsigned ext_index = 0; ext_index < ext_cnt; ext_index++) {
4563 | offset = ssh_dissect_rfc8308_extension(packet_tvb, pinfo, offset, peer_data, msg_type_tree);
4564 | }
4565 | }
4566 | return offset;
4567 | }
4568 |
4569 | static int
4570 | ssh_dissect_rfc8308_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
4571 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree)
4572 | {
4573 | (void)pinfo;
4574 | unsigned ext_name_slen = tvb_get_ntohl(packet_tvb, offset);
4575 | uint8_t *ext_name = tvb_get_string_enc(pinfo->pool, packet_tvb, offset + 4, ext_name_slen, ENC_ASCII0x00000000);
4576 | unsigned ext_value_slen = tvb_get_ntohl(packet_tvb, offset + 4 + ext_name_slen);
4577 | unsigned ext_len = 8 + ext_name_slen + ext_value_slen;
4578 | 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);
4579 |
4580 | proto_tree_add_item(ext_tree, hf_ssh_ext_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4581 | offset += 4;
4582 | proto_tree_add_item(ext_tree, hf_ssh_ext_name, packet_tvb, offset, ext_name_slen, ENC_ASCII0x00000000);
4583 | offset += ext_name_slen;
4584 | proto_tree_add_item(ext_tree, hf_ssh_ext_value_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4585 | offset += 4;
4586 | proto_tree_add_item(ext_tree, hf_ssh_ext_value, packet_tvb, offset, ext_value_slen, ENC_NA0x00000000);
4587 |
4588 | if (g_str_equal(ext_name, "server-sig-algs")(strcmp ((const char *) (ext_name), (const char *) ("server-sig-algs" )) == 0)) {
4589 | // server-sig-algs (RFC8308 Sec. 3.1)
4590 | proto_tree_add_item(ext_tree, hf_ssh_ext_server_sig_algs_algorithms, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4591 | offset += ext_value_slen;
4592 | } else if (g_str_equal(ext_name, "delay-compression")(strcmp ((const char *) (ext_name), (const char *) ("delay-compression" )) == 0)) {
4593 | // delay-compression (RFC8308 Sec 3.2)
4594 | unsigned slen;
4595 | slen = tvb_get_ntohl(packet_tvb, offset);
4596 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_client_to_server_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4597 | offset += 4;
4598 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_client_to_server, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4599 | offset += slen;
4600 | slen = tvb_get_ntohl(packet_tvb, offset);
4601 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_server_to_client_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4602 | offset += 4;
4603 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_server_to_client, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4604 | offset += slen;
4605 | } else if (g_str_equal(ext_name, "no-flow-control")(strcmp ((const char *) (ext_name), (const char *) ("no-flow-control" )) == 0)) {
4606 | // no-flow-control (RFC 8308 Sec 3.3)
4607 | proto_tree_add_item(ext_tree, hf_ssh_ext_no_flow_control_value, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4608 | offset += ext_value_slen;
4609 | } else if (g_str_equal(ext_name, "elevation")(strcmp ((const char *) (ext_name), (const char *) ("elevation" )) == 0)) {
4610 | // elevation (RFC 8308 Sec 3.4)
4611 | proto_tree_add_item(ext_tree, hf_ssh_ext_elevation_value, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4612 | offset += ext_value_slen;
4613 | } else if (g_str_equal(ext_name, "publickey-algorithms@roumenpetrov.info")(strcmp ((const char *) (ext_name), (const char *) ("publickey-algorithms@roumenpetrov.info" )) == 0)) {
4614 | // publickey-algorithms@roumenpetrov.info (proprietary)
4615 | proto_tree_add_item(ext_tree, hf_ssh_ext_prop_publickey_algorithms_algorithms, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4616 | offset += ext_value_slen;
4617 | } else if (g_str_equal(ext_name, "ping@openssh.com")(strcmp ((const char *) (ext_name), (const char *) ("ping@openssh.com" )) == 0)) {
4618 | // ping@openssh.com (proprietary w/ primitive extension value)
4619 | peer_data->global_data->ext_ping_openssh_offered = true1;
4620 | offset += ext_value_slen;
4621 | } else {
4622 | offset += ext_value_slen;
4623 | }
4624 |
4625 | // The following extensions do not require advanced dissection:
4626 | // - global-requests-ok
4627 | // - ext-auth-info
4628 | // - publickey-hostbound@openssh.com
4629 | // - ext-info-in-auth@openssh.com
4630 |
4631 | return offset;
4632 | }
4633 |
4634 | static int
4635 | ssh_dissect_userauth_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
4636 | int offset, proto_item *msg_type_tree, unsigned msg_code)
4637 | {
4638 | if(msg_code==SSH_MSG_USERAUTH_REQUEST50){
4639 | uint32_t slen;
4640 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_user_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4641 | offset += 4;
4642 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_user_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4643 | offset += slen;
4644 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4645 | offset += 4;
4646 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_service_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4647 | offset += slen;
4648 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_method_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4649 | offset += 4;
4650 | const char* key_type;
4651 | 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);
4652 | offset += slen;
4653 | if (0 == strcmp(key_type, "none")) {
4654 | }else if (0 == strcmp(key_type, "publickey") || 0 == strcmp(key_type, "publickey-hostbound-v00@openssh.com")) {
4655 | uint8_t bHaveSignature = tvb_get_uint8(packet_tvb, offset);
4656 | int dissected_len = 0;
4657 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_have_signature, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4658 | offset += 1;
4659 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_pka_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4660 | offset += 4;
4661 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4662 | offset += slen;
4663 | proto_item *ti;
4664 | ti = proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_blob_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4665 | offset += 4;
4666 | dissected_len = ssh_dissect_public_key_blob(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
4667 | if(dissected_len!=(int)slen){
4668 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4669 | }
4670 | offset += slen;
4671 | if (0 == strcmp(key_type, "publickey-hostbound-v00@openssh.com")) {
4672 | // Host key - but should we add it to global data or not?
4673 | offset += ssh_tree_add_hostkey(packet_tvb, pinfo, offset, msg_type_tree, "Server host key",
4674 | ett_key_exchange_host_key, NULL((void*)0));
4675 | }
4676 | if(bHaveSignature){
4677 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_signature_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4678 | offset += 4;
4679 | proto_item *signature_tree = NULL((void*)0);
4680 | signature_tree = proto_tree_add_subtree(msg_type_tree, packet_tvb, offset, slen, ett_userauth_pk_signature, NULL((void*)0), "Public key signature");
4681 | dissected_len = ssh_dissect_public_key_signature(packet_tvb, pinfo, offset, signature_tree) - offset;
4682 | if(dissected_len!=(int)slen){
4683 | expert_add_info_format(pinfo, signature_tree, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4684 | }
4685 | offset += slen;
4686 | }
4687 | }else if (0 == strcmp(key_type, "password")) {
4688 | uint8_t bChangePassword = tvb_get_uint8(packet_tvb, offset);
4689 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_change_password, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4690 | offset += 1;
4691 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_password_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4692 | offset += 4;
4693 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_password, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4694 | offset += slen;
4695 | if(bChangePassword){
4696 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_new_password_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4697 | offset += 4;
4698 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_new_password, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4699 | offset += slen;
4700 | }
4701 | }else{
4702 | }
4703 |
4704 | }else if(msg_code==SSH_MSG_USERAUTH_FAILURE51){
4705 | unsigned slen;
4706 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_auth_failure_list_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4707 | offset += 4;
4708 | proto_tree_add_item(msg_type_tree, hf_ssh_auth_failure_list, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4709 | offset += slen;
4710 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_partial_success, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4711 | offset += 1;
4712 | }
4713 | return offset;
4714 | }
4715 |
4716 | static int
4717 | ssh_dissect_userauth_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
4718 | int offset, proto_item *msg_type_tree, unsigned msg_code)
4719 | {
4720 | if(msg_code==SSH_MSG_USERAUTH_PK_OK60){
4721 | proto_item *ti;
4722 | int dissected_len = 0;
4723 | unsigned slen;
4724 | slen = tvb_get_ntohl(packet_tvb, offset) ;
4725 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4726 | offset += 4;
4727 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4728 | offset += slen;
4729 | ti = proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_blob_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4730 | offset += 4;
4731 | dissected_len = ssh_dissect_public_key_blob(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
4732 | if(dissected_len!=(int)slen){
4733 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4734 | }
4735 | offset += slen;
4736 | }
4737 | return offset;
4738 | }
4739 |
4740 | static void
4741 | ssh_process_payload(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, ssh_channel_info_t *channel)
4742 | {
4743 | tvbuff_t *next_tvb = tvb_new_subset_remaining(tvb, offset);
4744 | if (channel->handle) {
4745 | call_dissector(channel->handle, next_tvb, pinfo, proto_tree_get_root(tree));
4746 | } else {
4747 | call_data_dissector(next_tvb, pinfo, proto_tree_get_root(tree));
4748 | }
4749 | }
4750 |
4751 | static void
4752 | print_ssh_fragment_tree(fragment_head *ipfd_head, proto_tree *tree, proto_tree *ssh_tree, packet_info *pinfo, tvbuff_t *next_tvb)
4753 | {
4754 | proto_item *ssh_tree_item, *frag_tree_item;
4755 |
4756 | /*
4757 | * The subdissector thought it was completely
4758 | * desegmented (although the stuff at the
4759 | * end may, in turn, require desegmentation),
4760 | * so we show a tree with all segments.
4761 | */
4762 | show_fragment_tree(ipfd_head, &ssh_segment_items,
4763 | tree, pinfo, next_tvb, &frag_tree_item);
4764 | /*
4765 | * The toplevel fragment subtree is now
4766 | * behind all desegmented data; move it
4767 | * right behind the SSH tree.
4768 | */
4769 | ssh_tree_item = proto_tree_get_parent(ssh_tree);
4770 | /* The SSH protocol item is up a few levels from the message tree */
4771 | ssh_tree_item = proto_item_get_parent_nth(ssh_tree_item, 2);
4772 | if (frag_tree_item && ssh_tree_item) {
4773 | proto_tree_move_item(tree, ssh_tree_item, frag_tree_item);
4774 | }
4775 | }
4776 |
4777 | static uint32_t
4778 | ssh_msp_fragment_id(struct tcp_multisegment_pdu *msp)
4779 | {
4780 | /*
4781 | * If a frame contains multiple PDUs, then "first_frame" is not
4782 | * sufficient to uniquely identify groups of fragments. Therefore we use
4783 | * the tcp reassembly functions that also test msp->seq (the position of
4784 | * the initial fragment in the SSH channel).
4785 | */
4786 | return msp->first_frame;
4787 | }
4788 |
4789 | static void
4790 | ssh_proto_tree_add_segment_data(
4791 | proto_tree *tree,
4792 | tvbuff_t *tvb,
4793 | int offset,
4794 | int length,
4795 | const char *prefix)
4796 | {
4797 | proto_tree_add_bytes_format(
4798 | tree,
4799 | hf_ssh_segment_data,
4800 | tvb,
4801 | offset,
4802 | length,
4803 | NULL((void*)0),
4804 | "%sSSH segment data (%u %s)",
4805 | prefix != NULL((void*)0) ? prefix : "",
4806 | length,
4807 | plurality(length, "byte", "bytes")((length) == 1 ? ("byte") : ("bytes")));
4808 | }
4809 |
4810 | static void
4811 | desegment_ssh(tvbuff_t *tvb, packet_info *pinfo, uint32_t seq,
4812 | uint32_t nxtseq, proto_tree *tree, ssh_channel_info_t *channel)
4813 | {
4814 | fragment_head *ipfd_head;
4815 | bool_Bool must_desegment;
4816 | bool_Bool called_dissector;
4817 | unsigned another_pdu_follows;
4818 | bool_Bool another_segment_in_frame = false0;
4819 | int deseg_offset, offset = 0;
4820 | uint32_t deseg_seq;
4821 | int nbytes;
4822 | proto_item *item;
4823 | struct tcp_multisegment_pdu *msp;
4824 | bool_Bool first_pdu = true1;
4825 |
4826 | again:
4827 | ipfd_head = NULL((void*)0);
4828 | must_desegment = false0;
4829 | called_dissector = false0;
4830 | another_pdu_follows = 0;
4831 | msp = NULL((void*)0);
4832 |
4833 | /*
4834 | * Initialize these to assume no desegmentation.
4835 | * If that's not the case, these will be set appropriately
4836 | * by the subdissector.
4837 | */
4838 | pinfo->desegment_offset = 0;
4839 | pinfo->desegment_len = 0;
4840 |
4841 | /*
4842 | * Initialize this to assume that this segment will just be
4843 | * added to the middle of a desegmented chunk of data, so
4844 | * that we should show it all as data.
4845 | * If that's not the case, it will be set appropriately.
4846 | */
4847 | deseg_offset = offset;
4848 |
4849 | /* If we've seen this segment before (e.g., it's a retransmission),
4850 | * there's nothing for us to do. Certainly, don't add it to the list
4851 | * of multisegment_pdus (that would cause subsequent lookups to find
4852 | * the retransmission instead of the original transmission, breaking
4853 | * dissection of the desegmented pdu if we'd already seen the end of
4854 | * the pdu).
4855 | */
4856 | if ((msp = (struct tcp_multisegment_pdu *)wmem_tree_lookup32(channel->multisegment_pdus, seq))) {
4857 | const char *prefix;
4858 | bool_Bool is_retransmission = false0;
4859 |
4860 | if (msp->first_frame == pinfo->num) {
4861 | /* This must be after the first pass. */
4862 | prefix = "";
4863 | if (msp->last_frame == pinfo->num) {
4864 | col_clear(pinfo->cinfo, COL_INFO);
4865 | } else {
4866 | if (first_pdu) {
4867 | col_append_sep_str(pinfo->cinfo, COL_INFO, " ", "[SSH segment of a reassembled PDU]");
4868 | }
4869 | }
4870 | } else {
4871 | prefix = "Retransmitted ";
4872 | is_retransmission = true1;
4873 | }
4874 |
4875 | if (!is_retransmission) {
4876 | ipfd_head = fragment_get(&ssh_reassembly_table, pinfo, msp->first_frame, msp);
4877 | if (ipfd_head != NULL((void*)0) && ipfd_head->reassembled_in !=0 &&
4878 | ipfd_head->reassembled_in != pinfo->num) {
4879 | /* Show what frame this was reassembled in if not this one. */
4880 | item=proto_tree_add_uint(tree, *ssh_segment_items.hf_reassembled_in,
4881 | tvb, 0, 0, ipfd_head->reassembled_in);
4882 | proto_item_set_generated(item);
4883 | }
4884 | }
4885 | nbytes = tvb_reported_length_remaining(tvb, offset);
4886 | ssh_proto_tree_add_segment_data(tree, tvb, offset, nbytes, prefix);
4887 | return;
4888 | }
4889 |
4890 | /* Else, find the most previous PDU starting before this sequence number */
4891 | msp = (struct tcp_multisegment_pdu *)wmem_tree_lookup32_le(channel->multisegment_pdus, seq-1);
4892 | if (msp && msp->seq <= seq && msp->nxtpdu > seq) {
4893 | unsigned len;
4894 |
4895 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
4896 | msp->last_frame = pinfo->num;
4897 | msp->last_frame_time = pinfo->abs_ts;
4898 | }
4899 |
4900 | /* OK, this PDU was found, which means the segment continues
4901 | * a higher-level PDU and that we must desegment it.
4902 | */
4903 | if (msp->flags & MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001) {
4904 | /* The dissector asked for the entire segment */
4905 | len = tvb_reported_length_remaining(tvb, offset);
4906 | } else {
4907 | len = MIN(nxtseq, msp->nxtpdu)(((nxtseq) < (msp->nxtpdu)) ? (nxtseq) : (msp->nxtpdu )) - seq;
4908 | }
4909 |
4910 | ipfd_head = fragment_add(&ssh_reassembly_table, tvb, offset,
4911 | pinfo, ssh_msp_fragment_id(msp), msp,
4912 | seq - msp->seq,
4913 | len, (LT_SEQ (nxtseq,msp->nxtpdu)((int32_t)((nxtseq) - (msp->nxtpdu)) < 0)));
4914 |
4915 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)
4916 | && msp->flags & MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001) {
4917 | msp->flags &= (~MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001);
4918 |
4919 | /* If we consumed the entire segment there is no
4920 | * other pdu starting anywhere inside this segment.
4921 | * So update nxtpdu to point at least to the start
4922 | * of the next segment.
4923 | * (If the subdissector asks for even more data we
4924 | * will advance nxtpdu even further later down in
4925 | * the code.)
4926 | */
4927 | msp->nxtpdu = nxtseq;
4928 | }
4929 |
4930 | if ( (msp->nxtpdu < nxtseq)
4931 | && (msp->nxtpdu >= seq)
4932 | && (len > 0)) {
4933 | another_pdu_follows = msp->nxtpdu - seq;
4934 | }
4935 | } else {
4936 | /* This segment was not found in our table, so it doesn't
4937 | * contain a continuation of a higher-level PDU.
4938 | * Call the normal subdissector.
4939 | */
4940 | ssh_process_payload(tvb, offset, pinfo, tree, channel);
4941 | called_dissector = true1;
4942 |
4943 | /* Did the subdissector ask us to desegment some more data
4944 | * before it could handle the packet?
4945 | * If so we have to create some structures in our table but
4946 | * this is something we only do the first time we see this
4947 | * packet.
4948 | */
4949 | if (pinfo->desegment_len) {
4950 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))
4951 | must_desegment = true1;
4952 |
4953 | /*
4954 | * Set "deseg_offset" to the offset in "tvb"
4955 | * of the first byte of data that the
4956 | * subdissector didn't process.
4957 | */
4958 | deseg_offset = offset + pinfo->desegment_offset;
4959 | }
4960 |
4961 | /* Either no desegmentation is necessary, or this is
4962 | * segment contains the beginning but not the end of
4963 | * a higher-level PDU and thus isn't completely
4964 | * desegmented.
4965 | */
4966 | ipfd_head = NULL((void*)0);
4967 | }
4968 |
4969 | /* is it completely desegmented? */
4970 | if (ipfd_head && ipfd_head->reassembled_in == pinfo->num) {
4971 | /*
4972 | * Yes, we think it is.
4973 | * We only call subdissector for the last segment.
4974 | * Note that the last segment may include more than what
4975 | * we needed.
4976 | */
4977 | if (nxtseq < msp->nxtpdu) {
4978 | /*
4979 | * This is *not* the last segment. It is part of a PDU in the same
4980 | * frame, so no another PDU can follow this one.
4981 | * Do not reassemble SSH yet, it will be done in the final segment.
4982 | * (If we are reassembling at FIN, we will do that in dissect_ssl()
4983 | * after iterating through all the records.)
4984 | * Clear the Info column and avoid displaying [SSH segment of a
4985 | * reassembled PDU], the payload dissector will typically set it.
4986 | * (This is needed here for the second pass.)
4987 | */
4988 | another_pdu_follows = 0;
4989 | col_clear(pinfo->cinfo, COL_INFO);
4990 | another_segment_in_frame = true1;
4991 | } else {
4992 | /*
4993 | * OK, this is the last segment of the PDU and also the
4994 | * last segment in this frame.
4995 | * Let's call the subdissector with the desegmented
4996 | * data.
4997 | */
4998 | tvbuff_t *next_tvb;
4999 | int old_len;
5000 |
5001 | /*
5002 | * Reset column in case multiple SSH segments form the PDU
5003 | * and this last SSH segment is not in the first TCP segment of
5004 | * this frame.
5005 | * XXX prevent clearing the column if the last layer is not SSH?
5006 | */
5007 | /* Clear column during the first pass. */
5008 | col_clear(pinfo->cinfo, COL_INFO);
5009 |
5010 | /* create a new TVB structure for desegmented data */
5011 | next_tvb = tvb_new_chain(tvb, ipfd_head->tvb_data);
5012 |
5013 | /* add desegmented data to the data source list */
5014 | add_new_data_source(pinfo, next_tvb, "Reassembled SSH");
5015 |
5016 | /* call subdissector */
5017 | ssh_process_payload(next_tvb, 0, pinfo, tree, channel);
5018 | called_dissector = true1;
5019 |
5020 | /*
5021 | * OK, did the subdissector think it was completely
5022 | * desegmented, or does it think we need even more
5023 | * data?
5024 | */
5025 | old_len = (int)(tvb_reported_length(next_tvb) - tvb_reported_length_remaining(tvb, offset));
5026 | if (pinfo->desegment_len && pinfo->desegment_offset <= old_len) {
5027 | /*
5028 | * "desegment_len" isn't 0, so it needs more
5029 | * data for something - and "desegment_offset"
5030 | * is before "old_len", so it needs more data
5031 | * to dissect the stuff we thought was
5032 | * completely desegmented (as opposed to the
5033 | * stuff at the beginning being completely
5034 | * desegmented, but the stuff at the end
5035 | * being a new higher-level PDU that also
5036 | * needs desegmentation).
5037 | */
5038 | fragment_set_partial_reassembly(&ssh_reassembly_table,
5039 | pinfo, ssh_msp_fragment_id(msp), msp);
5040 | /* Update msp->nxtpdu to point to the new next
5041 | * pdu boundary.
5042 | */
5043 | if (pinfo->desegment_len == DESEGMENT_ONE_MORE_SEGMENT0x0fffffff) {
5044 | /* We want reassembly of at least one
5045 | * more segment so set the nxtpdu
5046 | * boundary to one byte into the next
5047 | * segment.
5048 | * This means that the next segment
5049 | * will complete reassembly even if it
5050 | * is only one single byte in length.
5051 | */
5052 | msp->nxtpdu = seq + tvb_reported_length_remaining(tvb, offset) + 1;
5053 | msp->flags |= MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001;
5054 | } else if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5055 | /* This is not the first segment, and we thought reassembly
5056 | * would be done now, but now we know we desegment at FIN.
5057 | * E.g., a HTTP response where the headers were split
5058 | * across segments (so previous ONE_MORE_SEGMENT) and
5059 | * also no Content-Length (so now DESEGMENT_UNTIL_FIN).
5060 | */
5061 | channel->flags |= TCP_FLOW_REASSEMBLE_UNTIL_FIN0x0001;
5062 | msp->nxtpdu = nxtseq + 0x40000000;
5063 | } else {
5064 | msp->nxtpdu = seq + tvb_reported_length_remaining(tvb, offset) + pinfo->desegment_len;
5065 | }
5066 | /* Since we need at least some more data
5067 | * there can be no pdu following in the
5068 | * tail of this segment.
5069 | */
5070 | another_pdu_follows = 0;
5071 | } else {
5072 | /*
5073 | * Show the stuff in this TCP segment as
5074 | * just raw TCP segment data.
5075 | */
5076 | nbytes = another_pdu_follows > 0
5077 | ? another_pdu_follows
5078 | : tvb_reported_length_remaining(tvb, offset);
5079 | ssh_proto_tree_add_segment_data(tree, tvb, offset, nbytes, NULL((void*)0));
5080 |
5081 | /* Show details of the reassembly */
5082 | print_ssh_fragment_tree(ipfd_head, proto_tree_get_root(tree), tree, pinfo, next_tvb);
5083 |
5084 | /* Did the subdissector ask us to desegment
5085 | * some more data? This means that the data
5086 | * at the beginning of this segment completed
5087 | * a higher-level PDU, but the data at the
5088 | * end of this segment started a higher-level
5089 | * PDU but didn't complete it.
5090 | *
5091 | * If so, we have to create some structures
5092 | * in our table, but this is something we
5093 | * only do the first time we see this packet.
5094 | */
5095 | if (pinfo->desegment_len) {
5096 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))
5097 | must_desegment = true1;
5098 |
5099 | /* The stuff we couldn't dissect
5100 | * must have come from this segment,
5101 | * so it's all in "tvb".
5102 | *
5103 | * "pinfo->desegment_offset" is
5104 | * relative to the beginning of
5105 | * "next_tvb"; we want an offset
5106 | * relative to the beginning of "tvb".
5107 | *
5108 | * First, compute the offset relative
5109 | * to the *end* of "next_tvb" - i.e.,
5110 | * the number of bytes before the end
5111 | * of "next_tvb" at which the
5112 | * subdissector stopped. That's the
5113 | * length of "next_tvb" minus the
5114 | * offset, relative to the beginning
5115 | * of "next_tvb, at which the
5116 | * subdissector stopped.
5117 | */
5118 | deseg_offset = ipfd_head->datalen - pinfo->desegment_offset;
5119 |
5120 | /* "tvb" and "next_tvb" end at the
5121 | * same byte of data, so the offset
5122 | * relative to the end of "next_tvb"
5123 | * of the byte at which we stopped
5124 | * is also the offset relative to
5125 | * the end of "tvb" of the byte at
5126 | * which we stopped.
5127 | *
5128 | * Convert that back into an offset
5129 | * relative to the beginning of
5130 | * "tvb", by taking the length of
5131 | * "tvb" and subtracting the offset
5132 | * relative to the end.
5133 | */
5134 | deseg_offset = tvb_reported_length(tvb) - deseg_offset;
5135 | }
5136 | }
5137 | }
5138 | }
5139 |
5140 | if (must_desegment) {
5141 | /* If the dissector requested "reassemble until FIN"
5142 | * just set this flag for the flow and let reassembly
5143 | * proceed at normal. We will check/pick up these
5144 | * reassembled PDUs later down in dissect_tcp() when checking
5145 | * for the FIN flag.
5146 | */
5147 | if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5148 | channel->flags |= TCP_FLOW_REASSEMBLE_UNTIL_FIN0x0001;
5149 | }
5150 | /*
5151 | * The sequence number at which the stuff to be desegmented
5152 | * starts is the sequence number of the byte at an offset
5153 | * of "deseg_offset" into "tvb".
5154 | *
5155 | * The sequence number of the byte at an offset of "offset"
5156 | * is "seq", i.e. the starting sequence number of this
5157 | * segment, so the sequence number of the byte at
5158 | * "deseg_offset" is "seq + (deseg_offset - offset)".
5159 | */
5160 | deseg_seq = seq + (deseg_offset - offset);
5161 |
5162 | if (((nxtseq - deseg_seq) <= 1024*1024)
5163 | && (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))) {
5164 | if (pinfo->desegment_len == DESEGMENT_ONE_MORE_SEGMENT0x0fffffff) {
5165 | /* The subdissector asked to reassemble using the
5166 | * entire next segment.
5167 | * Just ask reassembly for one more byte
5168 | * but set this msp flag so we can pick it up
5169 | * above.
5170 | */
5171 | msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5172 | deseg_seq, nxtseq+1, channel->multisegment_pdus);
5173 | msp->flags |= MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001;
5174 | } else if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5175 | /* Set nxtseq very large so that reassembly won't happen
5176 | * until we force it at the end of the stream in dissect_ssl()
5177 | * outside this function.
5178 | */
5179 | msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5180 | deseg_seq, nxtseq+0x40000000, channel->multisegment_pdus);
5181 | } else {
5182 | msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5183 | deseg_seq, nxtseq+pinfo->desegment_len, channel->multisegment_pdus);
5184 | }
5185 |
5186 | /* add this segment as the first one for this new pdu */
5187 | fragment_add(&ssh_reassembly_table, tvb, deseg_offset,
5188 | pinfo, ssh_msp_fragment_id(msp), msp,
5189 | 0, nxtseq - deseg_seq,
5190 | LT_SEQ(nxtseq, msp->nxtpdu)((int32_t)((nxtseq) - (msp->nxtpdu)) < 0));
5191 | }
5192 | }
5193 |
5194 | if (!called_dissector || pinfo->desegment_len != 0) {
5195 | if (ipfd_head != NULL((void*)0) && ipfd_head->reassembled_in != 0 &&
5196 | ipfd_head->reassembled_in != pinfo->num &&
5197 | !(ipfd_head->flags & FD_PARTIAL_REASSEMBLY0x0040)) {
5198 | /*
5199 | * We know what other frame this PDU is reassembled in;
5200 | * let the user know.
5201 | */
5202 | item=proto_tree_add_uint(tree, *ssh_segment_items.hf_reassembled_in,
5203 | tvb, 0, 0, ipfd_head->reassembled_in);
5204 | proto_item_set_generated(item);
5205 | }
5206 |
5207 | /*
5208 | * Either we didn't call the subdissector at all (i.e.,
5209 | * this is a segment that contains the middle of a
5210 | * higher-level PDU, but contains neither the beginning
5211 | * nor the end), or the subdissector couldn't dissect it
5212 | * all, as some data was missing (i.e., it set
5213 | * "pinfo->desegment_len" to the amount of additional
5214 | * data it needs).
5215 | */
5216 | if (!another_segment_in_frame && pinfo->desegment_offset == 0) {
5217 | /*
5218 | * It couldn't, in fact, dissect any of it (the
5219 | * first byte it couldn't dissect is at an offset
5220 | * of "pinfo->desegment_offset" from the beginning
5221 | * of the payload, and that's 0).
5222 | * Just mark this as SSH.
5223 | */
5224 |
5225 | /* SFTP checks the length before setting the protocol column.
5226 | * If other subdissectors don't do this, we'd want to set the
5227 | * protocol column back - but we want to get the SSH version
5228 | */
5229 | //col_set_str(pinfo->cinfo, COL_PROTOCOL,
5230 | // val_to_str_const(session->version, ssl_version_short_names, "SSH"));
5231 | if (first_pdu) {
5232 | col_append_sep_str(pinfo->cinfo, COL_INFO, " ", "[SSH segment of a reassembled PDU]");
5233 | }
5234 | }
5235 |
5236 | /*
5237 | * Show what's left in the packet as just raw SSH segment data.
5238 | * XXX - remember what protocol the last subdissector
5239 | * was, and report it as a continuation of that, instead?
5240 | */
5241 | nbytes = tvb_reported_length_remaining(tvb, deseg_offset);
5242 | ssh_proto_tree_add_segment_data(tree, tvb, deseg_offset, nbytes, NULL((void*)0));
5243 | }
5244 | pinfo->can_desegment = 0;
5245 | pinfo->desegment_offset = 0;
5246 | pinfo->desegment_len = 0;
5247 |
5248 | if (another_pdu_follows) {
5249 | /* there was another pdu following this one. */
5250 | pinfo->can_desegment=2;
5251 | /* we also have to prevent the dissector from changing the
5252 | * PROTOCOL and INFO colums since what follows may be an
5253 | * incomplete PDU and we don't want it be changed back from
5254 | * <Protocol> to <SSH>
5255 | */
5256 | col_set_fence(pinfo->cinfo, COL_INFO);
5257 | col_set_writable(pinfo->cinfo, COL_PROTOCOL, false0);
5258 | first_pdu = false0;
5259 | offset += another_pdu_follows;
5260 | seq += another_pdu_follows;
5261 | goto again;
5262 | }
5263 | }
5264 |
5265 | static void
5266 | ssh_dissect_channel_data(tvbuff_t *tvb, packet_info *pinfo,
5267 | struct ssh_peer_data *peer_data _U___attribute__((unused)), proto_tree *tree,
5268 | ssh_message_info_t *message _U___attribute__((unused)), ssh_channel_info_t *channel)
5269 | {
5270 |
5271 | uint16_t save_can_desegment = pinfo->can_desegment;
5272 |
5273 | if (ssh_desegment) {
5274 | pinfo->can_desegment = 2;
5275 | desegment_ssh(tvb, pinfo, message->byte_seq, message->next_byte_seq, tree, channel);
5276 | } else {
5277 | pinfo->can_desegment = 0;
5278 | bool_Bool save_fragmented = pinfo->fragmented;
5279 | pinfo->fragmented = true1;
5280 |
5281 | ssh_process_payload(tvb, 0, pinfo, tree, channel);
5282 | pinfo->fragmented = save_fragmented;
5283 | }
5284 |
5285 | pinfo->can_desegment = save_can_desegment;
5286 | }
5287 |
5288 | static int
5289 | ssh_dissect_term_modes(tvbuff_t *tvb, packet_info *pinfo _U___attribute__((unused)), proto_tree *tree)
5290 | {
5291 | proto_item *ti;
5292 | proto_tree *term_mode_tree, *subtree;
5293 | int offset = 0;
5294 | uint32_t opcode, value, idx;
5295 | bool_Bool boolval;
5296 |
5297 | struct tty_opt_info {
5298 | unsigned id;
5299 | int *hfindex;
5300 | };
5301 | static const struct tty_opt_info tty_opts[] = {
5302 | { SSH_TTY_OP_END0, NULL((void*)0)},
5303 | { SSH_TTY_OP_VINTR1, &hf_ssh_pty_term_mode_vintr },
5304 | { SSH_TTY_OP_VQUIT2, &hf_ssh_pty_term_mode_vquit },
5305 | { SSH_TTY_OP_VERASE3, &hf_ssh_pty_term_mode_verase },
5306 | { SSH_TTY_OP_VKILL4, &hf_ssh_pty_term_mode_vkill },
5307 | { SSH_TTY_OP_VEOF5, &hf_ssh_pty_term_mode_veof },
5308 | { SSH_TTY_OP_VEOL6, &hf_ssh_pty_term_mode_veol },
5309 | { SSH_TTY_OP_VEOL27, &hf_ssh_pty_term_mode_veol2 },
5310 | { SSH_TTY_OP_VSTART8, &hf_ssh_pty_term_mode_vstart },
5311 | { SSH_TTY_OP_VSTOP9, &hf_ssh_pty_term_mode_vstop },
5312 | { SSH_TTY_OP_VSUSP10, &hf_ssh_pty_term_mode_vsusp },
5313 | { SSH_TTY_OP_VDSUSP11, &hf_ssh_pty_term_mode_vdsusp },
5314 | { SSH_TTY_OP_VREPRINT12, &hf_ssh_pty_term_mode_vreprint },
5315 | { SSH_TTY_OP_VWERASE13, &hf_ssh_pty_term_mode_vwerase },
5316 | { SSH_TTY_OP_VLNEXT14, &hf_ssh_pty_term_mode_vlnext },
5317 | { SSH_TTY_OP_VFLUSH15, &hf_ssh_pty_term_mode_vflush },
5318 | { SSH_TTY_OP_VSWTCH16, &hf_ssh_pty_term_mode_vswtch },
5319 | { SSH_TTY_OP_VSTATUS17, &hf_ssh_pty_term_mode_vstatus },
5320 | { SSH_TTY_OP_VDISCARD18, &hf_ssh_pty_term_mode_vdiscard },
5321 | { SSH_TTY_OP_IGNPAR30, &hf_ssh_pty_term_mode_ignpar },
5322 | { SSH_TTY_OP_PARMRK31, &hf_ssh_pty_term_mode_parmrk },
5323 | { SSH_TTY_OP_INPCK32, &hf_ssh_pty_term_mode_inpck },
5324 | { SSH_TTY_OP_ISTRIP33, &hf_ssh_pty_term_mode_istrip },
5325 | { SSH_TTY_OP_INLCR34, &hf_ssh_pty_term_mode_inlcr },
5326 | { SSH_TTY_OP_IGNCR35, &hf_ssh_pty_term_mode_igncr },
5327 | { SSH_TTY_OP_ICRNL36, &hf_ssh_pty_term_mode_icrnl },
5328 | { SSH_TTY_OP_IUCLC37, &hf_ssh_pty_term_mode_iuclc },
5329 | { SSH_TTY_OP_IXON38, &hf_ssh_pty_term_mode_ixon },
5330 | { SSH_TTY_OP_IXANY39, &hf_ssh_pty_term_mode_ixany },
5331 | { SSH_TTY_OP_IXOFF40, &hf_ssh_pty_term_mode_ixoff },
5332 | { SSH_TTY_OP_IMAXBEL41, &hf_ssh_pty_term_mode_imaxbel },
5333 | { SSH_TTY_OP_IUTF842, &hf_ssh_pty_term_mode_iutf8 },
5334 | { SSH_TTY_OP_ISIG50, &hf_ssh_pty_term_mode_isig },
5335 | { SSH_TTY_OP_ICANON51, &hf_ssh_pty_term_mode_icanon },
5336 | { SSH_TTY_OP_XCASE52, &hf_ssh_pty_term_mode_xcase },
5337 | { SSH_TTY_OP_ECHO53, &hf_ssh_pty_term_mode_echo },
5338 | { SSH_TTY_OP_ECHOE54, &hf_ssh_pty_term_mode_echoe },
5339 | { SSH_TTY_OP_ECHOK55, &hf_ssh_pty_term_mode_echok },
5340 | { SSH_TTY_OP_ECHONL56, &hf_ssh_pty_term_mode_echonl },
5341 | { SSH_TTY_OP_NOFLSH57, &hf_ssh_pty_term_mode_noflsh },
5342 | { SSH_TTY_OP_TOSTOP58, &hf_ssh_pty_term_mode_tostop },
5343 | { SSH_TTY_OP_IEXTEN59, &hf_ssh_pty_term_mode_iexten },
5344 | { SSH_TTY_OP_ECHOCTL60, &hf_ssh_pty_term_mode_echoctl },
5345 | { SSH_TTY_OP_ECHOKE61, &hf_ssh_pty_term_mode_echoke },
5346 | { SSH_TTY_OP_PENDIN62, &hf_ssh_pty_term_mode_pendin },
5347 | { SSH_TTY_OP_OPOST70, &hf_ssh_pty_term_mode_opost },
5348 | { SSH_TTY_OP_OLCUC71, &hf_ssh_pty_term_mode_olcuc },
5349 | { SSH_TTY_OP_ONLCR72, &hf_ssh_pty_term_mode_onlcr },
5350 | { SSH_TTY_OP_OCRNL73, &hf_ssh_pty_term_mode_ocrnl },
5351 | { SSH_TTY_OP_ONOCR74, &hf_ssh_pty_term_mode_onocr },
5352 | { SSH_TTY_OP_ONLRET75, &hf_ssh_pty_term_mode_onlret },
5353 | { SSH_TTY_OP_CS790, &hf_ssh_pty_term_mode_cs7 },
5354 | { SSH_TTY_OP_CS891, &hf_ssh_pty_term_mode_cs8 },
5355 | { SSH_TTY_OP_PARENB92, &hf_ssh_pty_term_mode_parenb },
5356 | { SSH_TTY_OP_PARODD93, &hf_ssh_pty_term_mode_parodd },
5357 | { SSH_TTY_OP_ISPEED128, &hf_ssh_pty_term_mode_ispeed },
5358 | { SSH_TTY_OP_OSPEED129, &hf_ssh_pty_term_mode_ospeed }
5359 | };
5360 |
5361 | ti = proto_tree_add_item(tree, hf_ssh_pty_term_modes, tvb, offset, tvb_reported_length(tvb), ENC_NA0x00000000);
5362 | term_mode_tree = proto_item_add_subtree(ti, ett_term_modes);
5363 | while (tvb_reported_length_remaining(tvb, offset)) {
5364 | ti = proto_tree_add_item(term_mode_tree, hf_ssh_pty_term_mode, tvb, offset, 5, ENC_NA0x00000000);
5365 | subtree = proto_item_add_subtree(ti, ett_term_mode);
5366 | proto_tree_add_item_ret_uint(subtree, hf_ssh_pty_term_mode_opcode, tvb, offset, 1, ENC_NA0x00000000, &opcode);
5367 | proto_item_append_text(ti, ": %s", val_to_str_const(opcode, ssh_tty_op_vals, "Unknown"));
5368 | offset += 1;
5369 | if (opcode == SSH_TTY_OP_END0) {
5370 | break;
5371 | }
5372 | for (idx = 0; idx < array_length(tty_opts)(sizeof (tty_opts) / sizeof (tty_opts)[0]); idx++) {
5373 | if (tty_opts[idx].id == opcode) break;
5374 | }
5375 | if (idx >= array_length(tty_opts)(sizeof (tty_opts) / sizeof (tty_opts)[0])) {
5376 | proto_tree_add_item_ret_uint(subtree, hf_ssh_pty_term_mode_value, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &value);
5377 | proto_item_append_text(ti, "=%d", value);
5378 | } else {
5379 | 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" , 5379, "tty_opts[idx].hfindex"))));
5380 | int hfindex = *tty_opts[idx].hfindex;
5381 | switch (proto_registrar_get_ftype(hfindex)) {
5382 | case FT_BOOLEAN:
5383 | proto_tree_add_item_ret_boolean(subtree, hfindex, tvb, offset + 3, 1, ENC_NA0x00000000, &boolval);
5384 | proto_item_append_text(ti, "=%s", boolval ? "True" : "False");
5385 | break;
5386 | case FT_CHAR:
5387 | proto_tree_add_item_ret_uint(subtree, hfindex, tvb, offset + 3, 1, ENC_NA0x00000000, &value);
5388 | proto_item_append_text(ti, "='%s'", format_char(pinfo->pool, (char)value));
5389 | break;
5390 | case FT_UINT32:
5391 | proto_tree_add_item_ret_uint(subtree, hfindex, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &value);
5392 | proto_item_append_text(ti, "=%d", value);
5393 | break;
5394 | default:
5395 | DISSECTOR_ASSERT_NOT_REACHED()(proto_report_dissector_bug("%s:%u: failed assertion \"DISSECTOR_ASSERT_NOT_REACHED\"" , "epan/dissectors/packet-ssh.c", 5395));
5396 | }
5397 | }
5398 | offset += 4;
5399 | }
5400 | return offset;
5401 | }
5402 |
5403 | static int
5404 | ssh_dissect_connection_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
5405 | struct ssh_peer_data *peer_data, int offset, proto_tree *msg_type_tree,
5406 | unsigned msg_code, ssh_message_info_t *message)
5407 | {
5408 | uint32_t recipient_channel, sender_channel;
5409 |
5410 | if (msg_code == SSH_MSG_CHANNEL_OPEN90) {
5411 | uint32_t slen;
5412 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_type_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5413 | offset += 4;
5414 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_type_name, packet_tvb, offset, slen, ENC_UTF_80x00000002);
5415 | offset += slen;
5416 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_sender_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5417 | offset += 4;
5418 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_initial_window, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5419 | offset += 4;
5420 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_maximum_packet_size, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5421 | offset += 4;
5422 | } else if (msg_code == SSH_MSG_CHANNEL_OPEN_CONFIRMATION91) {
5423 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &recipient_channel);
5424 | offset += 4;
5425 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_sender_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &sender_channel);
5426 | offset += 4;
5427 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5428 | create_channel(peer_data, recipient_channel, sender_channel);
5429 | }
5430 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_initial_window, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5431 | offset += 4;
5432 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_maximum_packet_size, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5433 | offset += 4;
5434 | } else if (msg_code == SSH_MSG_CHANNEL_WINDOW_ADJUST93) {
5435 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5436 | offset += 4;
5437 | 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
5438 | offset += 4;
5439 | } else if (msg_code == SSH_MSG_CHANNEL_DATA94) {
5440 | 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);
5441 | offset += 4;
5442 | // TODO: process according to the type of channel
5443 | uint32_t slen;
5444 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_data_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5445 | offset += 4;
5446 | tvbuff_t* next_tvb = tvb_new_subset_length(packet_tvb, offset, slen);
5447 |
5448 | ssh_channel_info_t* channel = get_channel_info_for_channel(peer_data, recipient_channel);
5449 | if (channel) {
5450 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5451 | message->byte_seq = channel->byte_seq;
5452 | channel->byte_seq += slen;
5453 | message->next_byte_seq = channel->byte_seq;
5454 | }
5455 | ssh_dissect_channel_data(next_tvb, pinfo, peer_data, msg_type_tree, message, channel);
5456 | } else {
5457 | expert_add_info_format(pinfo, ti, &ei_ssh_channel_number, "Could not find configuration for channel %d", recipient_channel);
5458 | }
5459 | offset += slen;
5460 | } else if (msg_code == SSH_MSG_CHANNEL_EXTENDED_DATA95) {
5461 | 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);
5462 | offset += 4;
5463 | // TODO: process according to the type of channel
5464 | proto_tree_add_item(msg_type_tree, hf_ssh_channel_data_type_code, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5465 | offset += 4;
5466 | uint32_t slen;
5467 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_data_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5468 | offset += 4;
5469 | tvbuff_t* next_tvb = tvb_new_subset_length(packet_tvb, offset, slen);
5470 |
5471 | ssh_channel_info_t* channel = get_channel_info_for_channel(peer_data, recipient_channel);
5472 | if (channel) {
5473 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5474 | message->byte_seq = channel->byte_seq;
5475 | channel->byte_seq += slen;
5476 | message->next_byte_seq = channel->byte_seq;
5477 | }
5478 | ssh_dissect_channel_data(next_tvb, pinfo, peer_data, msg_type_tree, message, channel);
5479 | } else {
5480 | expert_add_info_format(pinfo, ti, &ei_ssh_channel_number, "Could not find configuration for channel %d", recipient_channel);
5481 | }
5482 | offset += slen;
5483 | } else if (msg_code == SSH_MSG_CHANNEL_EOF96) {
5484 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5485 | offset += 4;
5486 | } else if (msg_code == SSH_MSG_CHANNEL_CLOSE97) {
5487 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5488 | offset += 4;
5489 | } else if (msg_code == SSH_MSG_CHANNEL_REQUEST98) {
5490 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &recipient_channel);
5491 | offset += 4;
5492 | const char* request_name;
5493 | uint32_t slen;
5494 | int item_len;
5495 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_request_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5496 | offset += 4;
5497 | 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);
5498 | offset += slen;
5499 | proto_tree_add_item(msg_type_tree, hf_ssh_channel_request_want_reply, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5500 | offset += 1;
5501 | /* RFC 4254 6.5: "Only one of these requests ["shell", "exec",
5502 | * or "subsystem"] can succeed per channel." Set up the
5503 | * appropriate handler for future CHANNEL_DATA and
5504 | * CHANNEL_EXTENDED_DATA messages on the channel.
5505 | *
5506 | * XXX - For "shell" and "exec", it might make more sense to send
5507 | * CHANNEL_DATA to the "data-text-lines" dissector rather than "data".
5508 | * Ideally if a pty has been setup there would be a way to interpret
5509 | * the escape codes.
5510 | */
5511 | if (0 == strcmp(request_name, "subsystem")) {
5512 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_subsystem_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5513 | offset += 4;
5514 | const char* subsystem_name;
5515 | 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);
5516 | set_subdissector_for_channel(peer_data, recipient_channel, subsystem_name);
5517 | offset += slen;
5518 | } else if (0 == strcmp(request_name, "env")) {
5519 | /* The encoding for "env" variables and "exec" commands is not
5520 | * specified in the SSH protocol, and must match whatever the
5521 | * server expects. (Unlike CHANNEL_DATA, it is not affected by
5522 | * whatever is in "env" or anything else in the protocol, and the
5523 | * strings are passed to execve directly.) In practice the strings
5524 | * must not have internal NULs (no UTF-16), and OpenSSH for Windows
5525 | * and IBM z/OS force the use of UTF-8 and ISO-8859-1, respectively.
5526 | *
5527 | * These will probably be ASCII-compatible.
5528 | */
5529 | 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);
5530 | offset += item_len;
5531 | 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);
5532 | offset += item_len;
5533 | } else if (0 == strcmp(request_name, "exec")) {
5534 | 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);
5535 | offset += item_len;
5536 | set_subdissector_for_channel(peer_data, recipient_channel, "exec");
5537 | } else if (0 == strcmp(request_name, "exit-status")) {
5538 | proto_tree_add_item(msg_type_tree, hf_ssh_exit_status, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5539 | offset += 4;
5540 | } else if (0 == strcmp(request_name, "shell")) {
5541 | set_subdissector_for_channel(peer_data, recipient_channel, "shell");
5542 | } else if (0 == strcmp(request_name, "pty-req")) {
5543 | 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);
5544 | offset += item_len;
5545 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_width_char, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5546 | offset += 4;
5547 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_height_row, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5548 | offset += 4;
5549 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_width_pixel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5550 | offset += 4;
5551 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_height_pixel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5552 | offset += 4;
5553 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_pty_term_modes_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5554 | offset += 4;
5555 | offset += ssh_dissect_term_modes(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
5556 | }
5557 | } else if (msg_code == SSH_MSG_CHANNEL_SUCCESS99) {
5558 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5559 | offset += 4;
5560 | }
5561 | return offset;
5562 | }
5563 |
5564 | /* Channel mapping {{{ */
5565 |
5566 | /* The usual flow:
5567 | * 1. client sends SSH_MSG_CHANNEL_OPEN with its (sender) channel number
5568 | * 2. server responds with SSH_MSG_CHANNEL_OPEN_CONFIRMATION with
5569 | * its channel number and echoing the client's number, creating
5570 | * a bijective map
5571 | * 3. client sends SSH_MSG_CHANNEL_REQUEST which has the name of
5572 | * the shell, command, or subsystem to start. This has the recipient's
5573 | * channel number (i.e. the server's)
5574 | * 4. server may send back a SSG_MSG_CHANNEL_SUCCESS (or _FAILURE) with
5575 | * the the recipient (i.e., client) channel number, but this does not
5576 | * contain the subsystem name or anything identifying the request to
5577 | * which it responds. It MUST be sent in the same order as the
5578 | * corresponding request message (RFC 4254 4 Global Requests), so we
5579 | * could track it that way, but for our purposes we just treat all
5580 | * requests as successes. (If not, either there won't be data or another
5581 | * request will supercede it later.)
5582 | *
5583 | * Either side can open a channel (RFC 4254 5 Channel Mechanism). The
5584 | * typical flow is the client opening a channel, but in the case of
5585 | * remote port forwarding (7 TCP/IP Port Forwarding) the directions are
5586 | * swapped. For port forwarding, all the information is contained in the
5587 | * SSH_MSG_CHANNEL_OPEN, there is no SSH_MSG_CHANNEL_REQUEST.
5588 | *
5589 | * XXX: Channel numbers can be re-used after being closed (5.3 Closing a
5590 | * Channel), but not necessarily mapped to the same channel number on the
5591 | * other side. If that actually happens, the right way to handle this is
5592 | * to track the state changes over time for random packet access (e.g.,
5593 | * using a multimap with the packet number instead of maps.)
5594 | */
5595 |
5596 | static struct ssh_peer_data*
5597 | get_other_peer_data(struct ssh_peer_data *peer_data)
5598 | {
5599 | bool_Bool is_server = &peer_data->global_data->peer_data[SERVER_PEER_DATA1]==peer_data;
5600 | if (is_server) {
5601 | return &peer_data->global_data->peer_data[CLIENT_PEER_DATA0];
5602 | } else {
5603 | return &peer_data->global_data->peer_data[SERVER_PEER_DATA1];
5604 | }
5605 | }
5606 |
5607 | /* Create pairings between a recipient channel and the sender's channel,
5608 | * from a SSH_MSG_CHANNEL_OPEN_CONFIRMATION. */
5609 | static void
5610 | create_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, uint32_t sender_channel)
5611 | {
5612 | if (peer_data->channel_info == NULL((void*)0)) {
5613 | peer_data->channel_info = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5614 | }
5615 | 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)));
5616 |
5617 | if (peer_data->channel_handles == NULL((void*)0)) {
5618 | peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5619 | }
5620 |
5621 | 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)));
5622 | new_channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5623 | wmem_map_insert(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), new_channel);
5624 |
5625 | /* If the recipient channel is already configured in the other direction,
5626 | * set the handle. We need this if we eventually handle port forwarding,
5627 | * where all the information to handle the traffic is sent in the
5628 | * SSH_MSG_CHANNEL_OPEN message before the CONFIRMATION. It might also
5629 | * help if the packets are out of order (i.e. we get the client
5630 | * CHANNEL_REQUEST before the CHANNEL_OPEN_CONFIRMATION.)
5631 | */
5632 | struct ssh_peer_data *other_peer_data = get_other_peer_data(peer_data);
5633 | if (other_peer_data->channel_handles) {
5634 | ssh_channel_info_t *peer_channel = wmem_map_lookup(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)));
5635 | if (peer_channel) {
5636 | new_channel->handle = peer_channel->handle;
5637 | }
5638 | }
5639 | }
5640 |
5641 | static ssh_channel_info_t*
5642 | get_channel_info_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel)
5643 | {
5644 | if (peer_data->channel_handles == NULL((void*)0)) {
5645 | return NULL((void*)0);
5646 | }
5647 | ssh_channel_info_t *channel = wmem_map_lookup(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)));
5648 |
5649 | return channel;
5650 | }
5651 |
5652 | static void
5653 | set_subdissector_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, const char* subsystem_name)
5654 | {
5655 | dissector_handle_t handle = NULL((void*)0);
5656 | if (0 == strcmp(subsystem_name, "sftp")) {
5657 | handle = sftp_handle;
5658 | } else if (0 == strcmp(subsystem_name, "shell") ||
5659 | 0 == strcmp(subsystem_name, "exec")) {
5660 | handle = data_text_lines_handle;
5661 | }
5662 |
5663 | if (handle) {
5664 | /* Map this handle to the recipient channel */
5665 | ssh_channel_info_t *channel = NULL((void*)0);
5666 | if (peer_data->channel_handles == NULL((void*)0)) {
5667 | peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5668 | } else {
5669 | channel = wmem_map_lookup(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)));
5670 | }
5671 | if (channel == NULL((void*)0)) {
5672 | channel = wmem_new0(wmem_file_scope(), ssh_channel_info_t)((ssh_channel_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (ssh_channel_info_t)));
5673 | channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5674 | wmem_map_insert(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), channel);
5675 | }
5676 | channel->handle = handle;
5677 |
5678 | /* This recipient channel is the sender channel for the other side.
5679 | * Do we know what the recipient channel on the other side is? */
5680 | struct ssh_peer_data *other_peer_data = get_other_peer_data(peer_data);
5681 |
5682 | wmem_map_t *channel_info = other_peer_data->channel_info;
5683 | if (channel_info) {
5684 | void *sender_channel_p;
5685 | if (wmem_map_lookup_extended(channel_info, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), NULL((void*)0), &sender_channel_p)) {
5686 | uint32_t sender_channel = GPOINTER_TO_UINT(sender_channel_p)((guint) (gulong) (sender_channel_p));
5687 | /* Yes. See the handle for the other side too. */
5688 | if (other_peer_data->channel_handles == NULL((void*)0)) {
5689 | other_peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5690 | channel = NULL((void*)0);
5691 | } else {
5692 | channel = wmem_map_lookup(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)));
5693 | }
5694 | if (channel == NULL((void*)0)) {
5695 | channel = wmem_new0(wmem_file_scope(), ssh_channel_info_t)((ssh_channel_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (ssh_channel_info_t)));
5696 | channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5697 | wmem_map_insert(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)), channel);
5698 | }
5699 | channel->handle = handle;
5700 | }
5701 | }
5702 | }
5703 | }
5704 |
5705 | /* Channel mapping. }}} */
5706 |
5707 | static int
5708 | ssh_dissect_connection_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
5709 | int offset, proto_item *msg_type_tree, unsigned msg_code)
5710 | {
5711 | (void)pinfo;
5712 | if(msg_code==SSH_MSG_GLOBAL_REQUEST80){
5713 | const char* request_name;
5714 | unsigned slen;
5715 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5716 | proto_tree_add_item(msg_type_tree, hf_ssh_global_request_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5717 | offset += 4;
5718 | request_name = (char*)tvb_get_string_enc(pinfo->pool, packet_tvb, offset, slen, ENC_ASCII0x00000000|ENC_NA0x00000000);
5719 | proto_tree_add_item(msg_type_tree, hf_ssh_global_request_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
5720 | offset += slen;
5721 | proto_tree_add_item(msg_type_tree, hf_ssh_global_request_want_reply, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5722 | offset += 1;
5723 | if (0 == strcmp(request_name, "hostkeys-00@openssh.com") ||
5724 | 0 == strcmp(request_name, "hostkeys-prove-00@openssh.com")) {
5725 | while (tvb_reported_length_remaining(packet_tvb, offset)) {
5726 | offset += ssh_tree_add_hostkey(packet_tvb, pinfo, offset, msg_type_tree,
5727 | "Server host key", ett_key_exchange_host_key, NULL((void*)0));
5728 | }
5729 | }
5730 | }
5731 | return offset;
5732 | }
5733 |
5734 | static int
5735 | ssh_dissect_local_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
5736 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code) {
5737 | unsigned slen;
5738 | if (peer_data->global_data->ext_ping_openssh_offered && msg_code >= SSH_MSG_PING192 && msg_code <= SSH_MSG_PONG193) {
5739 | 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)"));
5740 | proto_tree_add_item(msg_type_tree, hf_ssh2_ext_ping_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5741 | offset += 1;
5742 | if (msg_code == SSH_MSG_PING192) {
5743 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5744 | proto_tree_add_item(msg_type_tree, hf_ssh_ping_data_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5745 | offset += 4;
5746 | proto_tree_add_item(msg_type_tree, hf_ssh_ping_data, packet_tvb, offset, slen, ENC_NA0x00000000);
5747 | offset += slen;
5748 | } else if (msg_code == SSH_MSG_PONG193) {
5749 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5750 | proto_tree_add_item(msg_type_tree, hf_ssh_pong_data_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5751 | offset += 4;
5752 | proto_tree_add_item(msg_type_tree, hf_ssh_pong_data, packet_tvb, offset, slen, ENC_NA0x00000000);
5753 | offset += slen;
5754 | }
5755 | } else {
5756 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
5757 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5758 | offset += 1;
5759 | }
5760 | return offset;
5761 | }
5762 |
5763 | static int
5764 | ssh_dissect_public_key_blob(tvbuff_t *tvb, packet_info *pinfo, proto_item *tree)
5765 | {
5766 | uint32_t slen;
5767 | const char* key_type;
5768 |
5769 | int offset = 0;
5770 | proto_tree *blob_tree = NULL((void*)0);
5771 | proto_item *blob_item = NULL((void*)0);
5772 |
5773 | blob_item = proto_tree_add_item(tree, hf_ssh_blob, tvb, offset, tvb_reported_length(tvb), ENC_NA0x00000000);
5774 | blob_tree = proto_item_add_subtree(blob_item, ett_userauth_pk_blob);
5775 | proto_tree_add_item_ret_uint(blob_tree, hf_ssh_pk_blob_name_length, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5776 | offset += 4;
5777 | 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);
5778 | proto_item_append_text(blob_item, " (type: %s)", key_type);
5779 | offset += slen;
5780 |
5781 | if (0 == strcmp(key_type, "ssh-rsa")) {
5782 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_e);
5783 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_n);
5784 | } else if (0 == strcmp(key_type, "ssh-dss")) {
5785 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_p);
5786 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_q);
5787 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_g);
5788 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_y);
5789 | } 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-" ) )) {
5790 | offset += ssh_tree_add_string(tvb, offset, blob_tree,
5791 | hf_ssh_blob_ecdsa_curve_id, hf_ssh_blob_ecdsa_curve_id_length);
5792 | offset += ssh_tree_add_string(tvb, offset, blob_tree,
5793 | hf_ssh_blob_ecdsa_q, hf_ssh_blob_ecdsa_q_length);
5794 | } 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") )) {
5795 | offset += ssh_tree_add_string(tvb, offset, blob_tree,
5796 | hf_ssh_blob_eddsa_key, hf_ssh_blob_eddsa_key_length);
5797 | } else {
5798 | proto_tree_add_item(blob_tree, hf_ssh_blob_data, tvb, offset, tvb_reported_length_remaining(tvb, offset), ENC_NA0x00000000);
5799 | offset += tvb_reported_length_remaining(tvb, offset);
5800 | }
5801 |
5802 | return offset;
5803 | }
5804 |
5805 | static int
5806 | ssh_dissect_public_key_signature(tvbuff_t *packet_tvb, packet_info *pinfo,
5807 | int offset, proto_item *msg_type_tree)
5808 | {
5809 | (void)pinfo;
5810 | unsigned slen;
5811 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5812 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_blob_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5813 | offset += 4;
5814 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_blob_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
5815 | offset += slen;
5816 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5817 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_s_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5818 | offset += 4;
5819 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_s, packet_tvb, offset, slen, ENC_NA0x00000000);
5820 | offset += slen;
5821 | return offset;
5822 | }
5823 |
5824 | #ifdef SSH_DECRYPT_DEBUG /* {{{ */
5825 |
5826 | static FILE* ssh_debug_file;
5827 |
5828 | static void
5829 | ssh_prefs_apply_cb(void)
5830 | {
5831 | ssh_set_debug(ssh_debug_file_name);
5832 | }
5833 |
5834 | static void
5835 | ssh_set_debug(const char* name)
5836 | {
5837 | static int debug_file_must_be_closed;
5838 | int use_stderr;
5839 |
5840 | use_stderr = name?(strcmp(name, SSH_DEBUG_USE_STDERR"-") == 0):0;
5841 |
5842 | if (debug_file_must_be_closed)
5843 | fclose(ssh_debug_file);
5844 |
5845 | if (use_stderr)
5846 | ssh_debug_file = stderrstderr;
5847 | else if (!name || (strcmp(name, "") ==0))
5848 | ssh_debug_file = NULL((void*)0);
5849 | else
5850 | ssh_debug_file = ws_fopenfopen(name, "w");
5851 |
5852 | if (!use_stderr && ssh_debug_file)
5853 | debug_file_must_be_closed = 1;
5854 | else
5855 | debug_file_must_be_closed = 0;
5856 |
5857 | ssh_debug_printf("Wireshark SSH debug log \n\n");
5858 | #ifdef HAVE_LIBGNUTLS1
5859 | ssh_debug_printf("GnuTLS version: %s\n", gnutls_check_version(NULL((void*)0)));
5860 | #endif
5861 | ssh_debug_printf("Libgcrypt version: %s\n", gcry_check_version(NULL((void*)0)));
5862 | ssh_debug_printf("\n");
5863 | }
5864 |
5865 | static void
5866 | ssh_debug_flush(void)
5867 | {
5868 | if (ssh_debug_file)
5869 | fflush(ssh_debug_file);
5870 | }
5871 |
5872 | static void
5873 | ssh_debug_printf(const char* fmt, ...)
5874 | {
5875 | va_list ap;
5876 |
5877 | if (!ssh_debug_file)
5878 | return;
5879 |
5880 | va_start(ap, fmt)__builtin_va_start(ap, fmt);
5881 | vfprintf(ssh_debug_file, fmt, ap);
5882 | va_end(ap)__builtin_va_end(ap);
5883 | }
5884 |
5885 | static void
5886 | ssh_print_data(const char* name, const unsigned char* data, size_t len)
5887 | {
5888 | size_t i, j, k;
5889 | if (!ssh_debug_file)
5890 | return;
5891 | #ifdef OPENSSH_STYLE
5892 | fprintf(ssh_debug_file,"%s[%d]\n",name, (int) len);
5893 | #else
5894 | fprintf(ssh_debug_file,"%s[%d]:\n",name, (int) len);
5895 | #endif
5896 | for (i=0; i<len; i+=16) {
5897 | #ifdef OPENSSH_STYLE
5898 | fprintf(ssh_debug_file,"%04u: ", (unsigned int)i);
5899 | #else
5900 | fprintf(ssh_debug_file,"| ");
5901 | #endif
5902 | for (j=i, k=0; k<16 && j<len; ++j, ++k)
5903 | fprintf(ssh_debug_file,"%.2x ",data[j]);
5904 | for (; k<16; ++k)
5905 | fprintf(ssh_debug_file," ");
5906 | #ifdef OPENSSH_STYLE
5907 | fputc(' ', ssh_debug_file);
5908 | #else
5909 | fputc('|', ssh_debug_file);
5910 | #endif
5911 | for (j=i, k=0; k<16 && j<len; ++j, ++k) {
5912 | unsigned char c = data[j];
5913 | if (!g_ascii_isprint(c)((g_ascii_table[(guchar) (c)] & G_ASCII_PRINT) != 0) || (c=='\t')) c = '.';
5914 | fputc(c, ssh_debug_file);
5915 | }
5916 | #ifdef OPENSSH_STYLE
5917 | fprintf(ssh_debug_file,"\n");
5918 | #else
5919 | for (; k<16; ++k)
5920 | fputc(' ', ssh_debug_file);
5921 | fprintf(ssh_debug_file,"|\n");
5922 | #endif
5923 | }
5924 | }
5925 |
5926 | #endif /* SSH_DECRYPT_DEBUG }}} */
5927 |
5928 | static void
5929 | ssh_secrets_block_callback(const void *secrets, unsigned size)
5930 | {
5931 | ssh_keylog_process_lines((const uint8_t *)secrets, size);
5932 | }
5933 |
5934 | /* Functions for SSH random hashtables. {{{ */
5935 | static int
5936 | ssh_equal (const void *v, const void *v2)
5937 | {
5938 | if (v == NULL((void*)0) || v2 == NULL((void*)0)) {
5939 | return 0;
5940 | }
5941 |
5942 | const ssh_bignum *val1;
5943 | const ssh_bignum *val2;
5944 | val1 = (const ssh_bignum *)v;
5945 | val2 = (const ssh_bignum *)v2;
5946 |
5947 | if (val1->length == val2->length &&
5948 | !memcmp(val1->data, val2->data, val2->length)) {
5949 | return 1;
5950 | }
5951 | return 0;
5952 | }
5953 |
5954 | static unsigned
5955 | ssh_hash (const void *v)
5956 | {
5957 | unsigned l,hash;
5958 | const ssh_bignum* id;
5959 | const unsigned* cur;
5960 |
5961 | if (v == NULL((void*)0)) {
5962 | return 0;
5963 | }
5964 |
5965 | hash = 0;
5966 | id = (const ssh_bignum*) v;
5967 |
5968 | /* id and id->data are mallocated in ssh_save_master_key(). As such 'data'
5969 | * should be aligned for any kind of access (for example as a unsigned as
5970 | * is done below). The intermediate void* cast is to prevent "cast
5971 | * increases required alignment of target type" warnings on CPUs (such
5972 | * as SPARCs) that do not allow misaligned memory accesses.
5973 | */
5974 | cur = (const unsigned*)(void*) id->data;
5975 |
5976 | for (l=4; (l < id->length); l+=4, cur++)
5977 | hash = hash ^ (*cur);
5978 |
5979 | return hash;
5980 | }
5981 |
5982 | static void
5983 | ssh_free_glib_allocated_bignum(void *data)
5984 | {
5985 | ssh_bignum * bignum;
5986 | if (data == NULL((void*)0)) {
5987 | return;
5988 | }
5989 |
5990 | bignum = (ssh_bignum *) data;
5991 | g_free(bignum->data);
5992 | g_free(bignum);
5993 | }
5994 |
5995 | static void
5996 | ssh_free_glib_allocated_entry(void *data)
5997 | {
5998 | ssh_key_map_entry_t * entry;
5999 | if (data == NULL((void*)0)) {
6000 | return;
6001 | }
6002 |
6003 | entry = (ssh_key_map_entry_t *) data;
6004 | g_free(entry->type);
6005 | ssh_free_glib_allocated_bignum(entry->key_material);
6006 | g_free(entry);
6007 | }
6008 | /* Functions for SSH random hashtables. }}} */
6009 |
6010 | static void
6011 | ssh_shutdown(void) {
6012 | g_hash_table_destroy(ssh_master_key_map);
6013 | }
6014 |
6015 | void
6016 | proto_register_ssh(void)
6017 | {
6018 | static hf_register_info hf[] = {
6019 | { &hf_ssh_protocol,
6020 | { "Protocol", "ssh.protocol",
6021 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6022 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6023 |
6024 | { &hf_ssh_packet_length,
6025 | { "Packet Length", "ssh.packet_length",
6026 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6027 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6028 |
6029 | { &hf_ssh_packet_length_encrypted,
6030 | { "Packet Length (encrypted)", "ssh.packet_length_encrypted",
6031 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6032 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6033 |
6034 | { &hf_ssh_padding_length,
6035 | { "Padding Length", "ssh.padding_length",
6036 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6037 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6038 |
6039 | { &hf_ssh_payload,
6040 | { "Payload", "ssh.payload",
6041 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6042 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6043 |
6044 | { &hf_ssh_encrypted_packet,
6045 | { "Encrypted Packet", "ssh.encrypted_packet",
6046 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6047 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6048 |
6049 | { &hf_ssh_padding_string,
6050 | { "Padding String", "ssh.padding_string",
6051 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6052 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6053 |
6054 | { &hf_ssh_seq_num,
6055 | { "Sequence number", "ssh.seq_num",
6056 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6057 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6058 |
6059 | { &hf_ssh_mac_string,
6060 | { "MAC", "ssh.mac",
6061 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6062 | "Message authentication code", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6063 |
6064 | { &hf_ssh_mac_status,
6065 | { "MAC Status", "ssh.mac.status", FT_UINT8, BASE_NONE, VALS(proto_checksum_vals)((0 ? (const struct _value_string*)0 : ((proto_checksum_vals) ))), 0x0,
6066 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6067 |
6068 | { &hf_ssh_direction,
6069 | { "Direction", "ssh.direction",
6070 | FT_BOOLEAN, BASE_NONE, TFS(&tfs_s2c_c2s)((0 ? (const struct true_false_string*)0 : ((&tfs_s2c_c2s )))), 0x0,
6071 | "Message direction", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6072 |
6073 | { &hf_ssh_msg_code,
6074 | { "Message Code", "ssh.message_code",
6075 | FT_UINT8, BASE_DEC, VALS(ssh1_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh1_msg_vals)))), 0x0,
6076 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6077 |
6078 | { &hf_ssh2_msg_code,
6079 | { "Message Code", "ssh.message_code",
6080 | FT_UINT8, BASE_DEC, VALS(ssh2_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_msg_vals)))), 0x0,
6081 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6082 |
6083 | { &hf_ssh2_kex_dh_msg_code,
6084 | { "Message Code", "ssh.message_code",
6085 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_dh_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_dh_msg_vals )))), 0x0,
6086 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6087 |
6088 | { &hf_ssh2_kex_dh_gex_msg_code,
6089 | { "Message Code", "ssh.message_code",
6090 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_dh_gex_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_dh_gex_msg_vals )))), 0x0,
6091 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6092 |
6093 | { &hf_ssh2_kex_ecdh_msg_code,
6094 | { "Message Code", "ssh.message_code",
6095 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_ecdh_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_ecdh_msg_vals )))), 0x0,
6096 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6097 |
6098 | { &hf_ssh2_kex_hybrid_msg_code,
6099 | { "Message Code", "ssh.message_code",
6100 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_hybrid_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_hybrid_msg_vals )))), 0x0,
6101 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6102 |
6103 | { &hf_ssh2_ext_ping_msg_code,
6104 | { "Message Code", "ssh.message_code",
6105 | FT_UINT8, BASE_DEC, VALS(ssh2_ext_ping_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_ext_ping_msg_vals )))), 0x0,
6106 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6107 |
6108 | { &hf_ssh_cookie,
6109 | { "Cookie", "ssh.cookie",
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_kex_algorithms,
6114 | { "kex_algorithms string", "ssh.kex_algorithms",
6115 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6116 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6117 |
6118 | { &hf_ssh_server_host_key_algorithms,
6119 | { "server_host_key_algorithms string", "ssh.server_host_key_algorithms",
6120 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6121 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6122 |
6123 | { &hf_ssh_encryption_algorithms_client_to_server,
6124 | { "encryption_algorithms_client_to_server string", "ssh.encryption_algorithms_client_to_server",
6125 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6126 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6127 |
6128 | { &hf_ssh_encryption_algorithms_server_to_client,
6129 | { "encryption_algorithms_server_to_client string", "ssh.encryption_algorithms_server_to_client",
6130 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6131 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6132 |
6133 | { &hf_ssh_mac_algorithms_client_to_server,
6134 | { "mac_algorithms_client_to_server string", "ssh.mac_algorithms_client_to_server",
6135 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6136 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6137 |
6138 | { &hf_ssh_mac_algorithms_server_to_client,
6139 | { "mac_algorithms_server_to_client string", "ssh.mac_algorithms_server_to_client",
6140 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6141 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6142 |
6143 | { &hf_ssh_compression_algorithms_client_to_server,
6144 | { "compression_algorithms_client_to_server string", "ssh.compression_algorithms_client_to_server",
6145 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6146 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6147 |
6148 | { &hf_ssh_compression_algorithms_server_to_client,
6149 | { "compression_algorithms_server_to_client string", "ssh.compression_algorithms_server_to_client",
6150 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6151 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6152 |
6153 | { &hf_ssh_languages_client_to_server,
6154 | { "languages_client_to_server string", "ssh.languages_client_to_server",
6155 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6156 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6157 |
6158 | { &hf_ssh_languages_server_to_client,
6159 | { "languages_server_to_client string", "ssh.languages_server_to_client",
6160 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6161 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6162 |
6163 | { &hf_ssh_kex_algorithms_length,
6164 | { "kex_algorithms length", "ssh.kex_algorithms_length",
6165 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6166 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6167 |
6168 | { &hf_ssh_server_host_key_algorithms_length,
6169 | { "server_host_key_algorithms length", "ssh.server_host_key_algorithms_length",
6170 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6171 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6172 |
6173 | { &hf_ssh_encryption_algorithms_client_to_server_length,
6174 | { "encryption_algorithms_client_to_server length", "ssh.encryption_algorithms_client_to_server_length",
6175 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6176 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6177 |
6178 | { &hf_ssh_encryption_algorithms_server_to_client_length,
6179 | { "encryption_algorithms_server_to_client length", "ssh.encryption_algorithms_server_to_client_length",
6180 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6181 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6182 |
6183 | { &hf_ssh_mac_algorithms_client_to_server_length,
6184 | { "mac_algorithms_client_to_server length", "ssh.mac_algorithms_client_to_server_length",
6185 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6186 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6187 |
6188 | { &hf_ssh_mac_algorithms_server_to_client_length,
6189 | { "mac_algorithms_server_to_client length", "ssh.mac_algorithms_server_to_client_length",
6190 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6191 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6192 |
6193 | { &hf_ssh_compression_algorithms_client_to_server_length,
6194 | { "compression_algorithms_client_to_server length", "ssh.compression_algorithms_client_to_server_length",
6195 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6196 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6197 |
6198 | { &hf_ssh_compression_algorithms_server_to_client_length,
6199 | { "compression_algorithms_server_to_client length", "ssh.compression_algorithms_server_to_client_length",
6200 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6201 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6202 |
6203 | { &hf_ssh_languages_client_to_server_length,
6204 | { "languages_client_to_server length", "ssh.languages_client_to_server_length",
6205 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6206 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6207 |
6208 | { &hf_ssh_languages_server_to_client_length,
6209 | { "languages_server_to_client length", "ssh.languages_server_to_client_length",
6210 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6211 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6212 |
6213 | { &hf_ssh_first_kex_packet_follows,
6214 | { "First KEX Packet Follows", "ssh.first_kex_packet_follows",
6215 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6216 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6217 |
6218 | { &hf_ssh_kex_reserved,
6219 | { "Reserved", "ssh.kex.reserved",
6220 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6221 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6222 |
6223 | { &hf_ssh_kex_hassh_algo,
6224 | { "hasshAlgorithms", "ssh.kex.hassh_algorithms",
6225 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6226 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6227 |
6228 | { &hf_ssh_kex_hassh,
6229 | { "hassh", "ssh.kex.hassh",
6230 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6231 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6232 |
6233 | { &hf_ssh_kex_hasshserver_algo,
6234 | { "hasshServerAlgorithms", "ssh.kex.hasshserver_algorithms",
6235 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6236 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6237 |
6238 | { &hf_ssh_kex_hasshserver,
6239 | { "hasshServer", "ssh.kex.hasshserver",
6240 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6241 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6242 |
6243 | { &hf_ssh_hostkey_length,
6244 | { "Host key length", "ssh.host_key.length",
6245 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6246 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6247 |
6248 | { &hf_ssh_hostkey_type_length,
6249 | { "Host key type length", "ssh.host_key.type_length",
6250 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6251 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6252 |
6253 | { &hf_ssh_hostkey_type,
6254 | { "Host key type", "ssh.host_key.type",
6255 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6256 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6257 |
6258 | { &hf_ssh_hostkey_data,
6259 | { "Host key data", "ssh.host_key.data",
6260 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6261 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6262 |
6263 | { &hf_ssh_hostkey_rsa_n,
6264 | { "RSA modulus (N)", "ssh.host_key.rsa.n",
6265 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6266 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6267 |
6268 | { &hf_ssh_hostkey_rsa_e,
6269 | { "RSA public exponent (e)", "ssh.host_key.rsa.e",
6270 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6271 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6272 |
6273 | { &hf_ssh_hostkey_dsa_p,
6274 | { "DSA prime modulus (p)", "ssh.host_key.dsa.p",
6275 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6276 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6277 |
6278 | { &hf_ssh_hostkey_dsa_q,
6279 | { "DSA prime divisor (q)", "ssh.host_key.dsa.q",
6280 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6281 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6282 |
6283 | { &hf_ssh_hostkey_dsa_g,
6284 | { "DSA subgroup generator (g)", "ssh.host_key.dsa.g",
6285 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6286 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6287 |
6288 | { &hf_ssh_hostkey_dsa_y,
6289 | { "DSA public key (y)", "ssh.host_key.dsa.y",
6290 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6291 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6292 |
6293 | { &hf_ssh_hostkey_ecdsa_curve_id,
6294 | { "ECDSA elliptic curve identifier", "ssh.host_key.ecdsa.id",
6295 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6296 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6297 |
6298 | { &hf_ssh_hostkey_ecdsa_curve_id_length,
6299 | { "ECDSA elliptic curve identifier length", "ssh.host_key.ecdsa.id_length",
6300 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6301 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6302 |
6303 | { &hf_ssh_hostkey_ecdsa_q,
6304 | { "ECDSA public key (Q)", "ssh.host_key.ecdsa.q",
6305 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6306 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6307 |
6308 | { &hf_ssh_hostkey_ecdsa_q_length,
6309 | { "ECDSA public key length", "ssh.host_key.ecdsa.q_length",
6310 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6311 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6312 |
6313 | { &hf_ssh_hostkey_eddsa_key,
6314 | { "EdDSA public key", "ssh.host_key.eddsa.key",
6315 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6316 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6317 |
6318 | { &hf_ssh_hostkey_eddsa_key_length,
6319 | { "EdDSA public key length", "ssh.host_key.eddsa.key_length",
6320 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6321 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6322 |
6323 | { &hf_ssh_hostsig_length,
6324 | { "Host signature length", "ssh.host_sig.length",
6325 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6326 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6327 |
6328 | { &hf_ssh_hostsig_type_length,
6329 | { "Host signature type length", "ssh.host_sig.type_length",
6330 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6331 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6332 |
6333 | { &hf_ssh_hostsig_type,
6334 | { "Host signature type", "ssh.host_sig.type",
6335 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6336 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6337 |
6338 | { &hf_ssh_hostsig_data,
6339 | { "Host signature data", "ssh.host_sig.data",
6340 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6341 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6342 |
6343 | { &hf_ssh_hostsig_rsa,
6344 | { "RSA signature", "ssh.host_sig.rsa",
6345 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6346 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6347 |
6348 | { &hf_ssh_hostsig_dsa,
6349 | { "DSA signature", "ssh.host_sig.dsa",
6350 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6351 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6352 |
6353 | { &hf_ssh_dh_e,
6354 | { "DH client e", "ssh.dh.e",
6355 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6356 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6357 |
6358 | { &hf_ssh_dh_f,
6359 | { "DH server f", "ssh.dh.f",
6360 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6361 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6362 |
6363 | { &hf_ssh_dh_gex_min,
6364 | { "DH GEX Min", "ssh.dh_gex.min",
6365 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6366 | "Minimal acceptable group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6367 |
6368 | { &hf_ssh_dh_gex_nbits,
6369 | { "DH GEX Number of Bits", "ssh.dh_gex.nbits",
6370 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6371 | "Preferred group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6372 |
6373 | { &hf_ssh_dh_gex_max,
6374 | { "DH GEX Max", "ssh.dh_gex.max",
6375 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6376 | "Maximal acceptable group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6377 |
6378 | { &hf_ssh_dh_gex_p,
6379 | { "DH GEX modulus (P)", "ssh.dh_gex.p",
6380 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6381 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6382 |
6383 | { &hf_ssh_dh_gex_g,
6384 | { "DH GEX base (G)", "ssh.dh_gex.g",
6385 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6386 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6387 |
6388 | { &hf_ssh_ecdh_q_c,
6389 | { "ECDH client's ephemeral public key (Q_C)", "ssh.ecdh.q_c",
6390 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6391 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6392 |
6393 | { &hf_ssh_ecdh_q_c_length,
6394 | { "ECDH client's ephemeral public key length", "ssh.ecdh.q_c_length",
6395 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6396 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6397 |
6398 | { &hf_ssh_ecdh_q_s,
6399 | { "ECDH server's ephemeral public key (Q_S)", "ssh.ecdh.q_s",
6400 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6401 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6402 |
6403 | { &hf_ssh_ecdh_q_s_length,
6404 | { "ECDH server's ephemeral public key length", "ssh.ecdh.q_s_length",
6405 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6406 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6407 |
6408 | { &hf_ssh_mpint_length,
6409 | { "Multi Precision Integer Length", "ssh.mpint_length",
6410 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6411 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6412 |
6413 | { &hf_ssh_ignore_data_length,
6414 | { "Debug message length", "ssh.ignore_data_length",
6415 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6416 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6417 |
6418 | { &hf_ssh_ignore_data,
6419 | { "Ignore data", "ssh.ignore_data",
6420 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6421 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6422 |
6423 | { &hf_ssh_debug_always_display,
6424 | { "Always Display", "ssh.debug_always_display",
6425 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6426 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6427 |
6428 | { &hf_ssh_debug_message_length,
6429 | { "Debug message length", "ssh.debug_name_length",
6430 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6431 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6432 |
6433 | { &hf_ssh_debug_message,
6434 | { "Debug message", "ssh.debug_name",
6435 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6436 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6437 |
6438 | { &hf_ssh_service_name_length,
6439 | { "Service Name length", "ssh.service_name_length",
6440 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6441 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6442 |
6443 | { &hf_ssh_service_name,
6444 | { "Service Name", "ssh.service_name",
6445 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6446 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6447 |
6448 | { &hf_ssh_disconnect_reason,
6449 | { "Disconnect reason", "ssh.disconnect_reason",
6450 | FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
6451 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6452 |
6453 | { &hf_ssh_disconnect_description_length,
6454 | { "Disconnect description length", "ssh.disconnect_description_length",
6455 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6456 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6457 |
6458 | { &hf_ssh_disconnect_description,
6459 | { "Disconnect description", "ssh.disconnect_description",
6460 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6461 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6462 |
6463 | { &hf_ssh_ext_count,
6464 | { "Extension count", "ssh.extension.count",
6465 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6466 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6467 |
6468 | { &hf_ssh_ext_name_length,
6469 | { "Extension name length", "ssh.extension.name_length",
6470 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6471 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6472 |
6473 | { &hf_ssh_ext_name,
6474 | { "Extension name", "ssh.extension.name",
6475 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6476 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6477 |
6478 | { &hf_ssh_ext_value_length,
6479 | { "Extension value length", "ssh.extension.value_length",
6480 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6481 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6482 |
6483 | { &hf_ssh_ext_value,
6484 | { "Extension value", "ssh.extension.value",
6485 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6486 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6487 |
6488 | { &hf_ssh_ext_server_sig_algs_algorithms,
6489 | { "Accepted signature algorithms", "ssh.extension.server_sig_algs.algorithms",
6490 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6491 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6492 |
6493 | { &hf_ssh_ext_delay_compression_algorithms_client_to_server_length,
6494 | { "Compression algorithms (client to server) length", "ssh.extension.delay_compression.compression_algorithms_client_to_server_length",
6495 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6496 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6497 |
6498 | { &hf_ssh_ext_delay_compression_algorithms_client_to_server,
6499 | { "Compression algorithms (client to server)", "ssh.extension.delay_compression.compression_algorithms_client_to_server",
6500 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6501 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6502 |
6503 | { &hf_ssh_ext_delay_compression_algorithms_server_to_client_length,
6504 | { "Compression algorithms (server to client) length", "ssh.extension.delay_compression.compression_algorithms_server_to_client_length",
6505 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6506 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6507 |
6508 | { &hf_ssh_ext_delay_compression_algorithms_server_to_client,
6509 | { "Compression algorithms (server to client)", "ssh.extension.delay_compression.compression_algorithms_server_to_client",
6510 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6511 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6512 |
6513 | { &hf_ssh_ext_no_flow_control_value,
6514 | { "No flow control flag", "ssh.extension.no_flow_control.value",
6515 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6516 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6517 |
6518 | { &hf_ssh_ext_elevation_value,
6519 | { "Elevation flag", "ssh.extension.elevation.value",
6520 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6521 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6522 |
6523 | { &hf_ssh_ext_prop_publickey_algorithms_algorithms,
6524 | { "Public key algorithms", "ssh.extension.prop_publickey_algorithms.algorithms",
6525 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6526 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6527 |
6528 | { &hf_ssh_lang_tag_length,
6529 | { "Language tag length", "ssh.lang_tag_length",
6530 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6531 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6532 |
6533 | { &hf_ssh_lang_tag,
6534 | { "Language tag", "ssh.lang_tag",
6535 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6536 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6537 |
6538 | { &hf_ssh_ping_data_length,
6539 | { "Data length", "ssh.ping_data_length",
6540 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6541 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6542 |
6543 | { &hf_ssh_ping_data,
6544 | { "Data", "ssh.ping_data",
6545 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6546 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6547 |
6548 | { &hf_ssh_pong_data_length,
6549 | { "Data length", "ssh.pong_data_length",
6550 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6551 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6552 |
6553 | { &hf_ssh_pong_data,
6554 | { "Data", "ssh.pong_data",
6555 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6556 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6557 |
6558 |
6559 | { &hf_ssh_userauth_user_name_length,
6560 | { "User Name length", "ssh.userauth_user_name_length",
6561 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6562 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6563 |
6564 | { &hf_ssh_userauth_user_name,
6565 | { "User Name", "ssh.userauth_user_name",
6566 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6567 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6568 |
6569 | { &hf_ssh_userauth_change_password,
6570 | { "Change password", "ssh.userauth.change_password",
6571 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6572 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6573 |
6574 | { &hf_ssh_userauth_service_name_length,
6575 | { "Service Name length", "ssh.userauth_service_name_length",
6576 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6577 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6578 |
6579 | { &hf_ssh_userauth_service_name,
6580 | { "Service Name", "ssh.userauth_service_name",
6581 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6582 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6583 |
6584 | { &hf_ssh_userauth_method_name_length,
6585 | { "Method Name length", "ssh.userauth_method_name_length",
6586 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6587 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6588 |
6589 | { &hf_ssh_userauth_method_name,
6590 | { "Method Name", "ssh.userauth_method_name",
6591 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6592 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6593 |
6594 | { &hf_ssh_userauth_have_signature,
6595 | { "Have signature", "ssh.userauth.have_signature",
6596 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6597 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6598 |
6599 | { &hf_ssh_userauth_password_length,
6600 | { "Password length", "ssh.userauth_password_length",
6601 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6602 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6603 |
6604 | { &hf_ssh_userauth_password,
6605 | { "Password", "ssh.userauth_password",
6606 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6607 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6608 |
6609 | { &hf_ssh_userauth_new_password_length,
6610 | { "New password length", "ssh.userauth_new_password_length",
6611 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6612 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6613 |
6614 | { &hf_ssh_userauth_new_password,
6615 | { "New password", "ssh.userauth_new_password",
6616 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6617 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6618 |
6619 | { &hf_ssh_auth_failure_list_length,
6620 | { "Authentications that can continue list len", "ssh.auth_failure_cont_list_length",
6621 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6622 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6623 |
6624 | { &hf_ssh_auth_failure_list,
6625 | { "Authentications that can continue list", "ssh.auth_failure_cont_list",
6626 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6627 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6628 |
6629 | { &hf_ssh_userauth_partial_success,
6630 | { "Partial success", "ssh.userauth.partial_success",
6631 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6632 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6633 |
6634 | { &hf_ssh_userauth_pka_name_len,
6635 | { "Public key algorithm name length", "ssh.userauth_pka_name_length",
6636 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6637 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6638 |
6639 | { &hf_ssh_userauth_pka_name,
6640 | { "Public key algorithm name", "ssh.userauth_pka_name",
6641 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6642 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6643 |
6644 | { &hf_ssh_pk_blob_name_length,
6645 | { "Public key blob algorithm name length", "ssh.pk_blob_name_length",
6646 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6647 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6648 |
6649 | { &hf_ssh_pk_blob_name,
6650 | { "Public key blob algorithm name", "ssh.pk_blob_name",
6651 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6652 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6653 |
6654 | { &hf_ssh_blob_length,
6655 | { "Public key blob length", "ssh.pk_blob_length",
6656 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6657 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6658 |
6659 | { &hf_ssh_blob,
6660 | { "Public key blob", "ssh.pk_blob",
6661 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6662 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6663 |
6664 | { &hf_ssh_blob_e,
6665 | { "ssh-rsa public exponent (e)", "ssh.pk_blob.ssh-rsa.e",
6666 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6667 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6668 |
6669 | { &hf_ssh_blob_n,
6670 | { "ssh-rsa modulus (n)", "ssh.pk_blob.ssh-rsa.n",
6671 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6672 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6673 |
6674 | { &hf_ssh_blob_dsa_p,
6675 | { "DSA prime modulus (p)", "ssh.pk_blob.dsa.p",
6676 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6677 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6678 |
6679 | { &hf_ssh_blob_dsa_q,
6680 | { "DSA prime divisor (q)", "ssh.pk_blob.dsa.q",
6681 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6682 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6683 |
6684 | { &hf_ssh_blob_dsa_g,
6685 | { "DSA subgroup generator (g)", "ssh.pk_blob.dsa.g",
6686 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6687 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6688 |
6689 | { &hf_ssh_blob_dsa_y,
6690 | { "DSA public key (y)", "ssh.pk_blob.dsa.y",
6691 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6692 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6693 |
6694 | { &hf_ssh_blob_ecdsa_curve_id,
6695 | { "ECDSA elliptic curve identifier", "ssh.pk_blob.ecdsa.id",
6696 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6697 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6698 |
6699 | { &hf_ssh_blob_ecdsa_curve_id_length,
6700 | { "ECDSA elliptic curve identifier length", "ssh.pk_blob.ecdsa.id_length",
6701 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6702 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6703 |
6704 | { &hf_ssh_blob_ecdsa_q,
6705 | { "ECDSA public key (Q)", "ssh.pk_blob.ecdsa.q",
6706 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6707 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6708 |
6709 | { &hf_ssh_blob_ecdsa_q_length,
6710 | { "ECDSA public key length", "ssh.pk_blob.ecdsa.q_length",
6711 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6712 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6713 |
6714 | { &hf_ssh_blob_eddsa_key,
6715 | { "EdDSA public key", "ssh.pk_blob.eddsa.key",
6716 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6717 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6718 |
6719 | { &hf_ssh_blob_eddsa_key_length,
6720 | { "EdDSA public key length", "ssh.pk_blob.eddsa.key_length",
6721 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6722 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6723 |
6724 | { &hf_ssh_blob_data,
6725 | { "Public key blob data", "ssh.pk_blob.data",
6726 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6727 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6728 |
6729 | { &hf_ssh_signature_length,
6730 | { "Public key signature blob length", "ssh.pk_sig_blob_length",
6731 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6732 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6733 |
6734 | { &hf_ssh_pk_sig_blob_name_length,
6735 | { "Public key signature blob algorithm name length", "ssh.pk_sig_blob_name_length",
6736 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6737 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6738 |
6739 | { &hf_ssh_pk_sig_blob_name,
6740 | { "Public key signature blob algorithm name", "ssh.pk_sig_blob_name",
6741 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6742 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6743 |
6744 | { &hf_ssh_pk_sig_s_length,
6745 | { "ssh-rsa signature length", "ssh.sig.ssh-rsa.length",
6746 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6747 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6748 |
6749 | { &hf_ssh_pk_sig_s,
6750 | { "ssh-rsa signature (s)", "ssh.sig.ssh-rsa.s",
6751 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6752 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6753 |
6754 | { &hf_ssh_connection_type_name_len,
6755 | { "Channel type name length", "ssh.connection_type_name_length",
6756 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6757 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6758 |
6759 | { &hf_ssh_connection_type_name,
6760 | { "Channel type name", "ssh.connection_type_name",
6761 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6762 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6763 |
6764 | { &hf_ssh_connection_sender_channel,
6765 | { "Sender channel", "ssh.connection_sender_channel",
6766 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6767 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6768 |
6769 | { &hf_ssh_connection_recipient_channel,
6770 | { "Recipient channel", "ssh.connection_recipient_channel",
6771 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6772 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6773 |
6774 | { &hf_ssh_connection_initial_window,
6775 | { "Initial window size", "ssh.connection_initial_window_size",
6776 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6777 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6778 |
6779 | { &hf_ssh_connection_maximum_packet_size,
6780 | { "Maximum packet size", "ssh.userauth_maximum_packet_size",
6781 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6782 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6783 |
6784 | { &hf_ssh_global_request_name_len,
6785 | { "Global request name length", "ssh.global_request_name_length",
6786 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6787 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6788 |
6789 | { &hf_ssh_global_request_name,
6790 | { "Global request name", "ssh.global_request_name",
6791 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6792 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6793 |
6794 | { &hf_ssh_global_request_want_reply,
6795 | { "Global request want reply", "ssh.global_request_want_reply",
6796 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6797 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6798 |
6799 | { &hf_ssh_global_request_hostkeys_array_len,
6800 | { "Host keys array length", "ssh.global_request_hostkeys",
6801 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6802 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6803 |
6804 | { &hf_ssh_channel_request_name_len,
6805 | { "Channel request name length", "ssh.channel_request_name_length",
6806 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6807 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6808 |
6809 | { &hf_ssh_channel_request_name,
6810 | { "Channel request name", "ssh.channel_request_name",
6811 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6812 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6813 |
6814 | { &hf_ssh_channel_request_want_reply,
6815 | { "Channel request want reply", "ssh.channel_request_want_reply",
6816 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6817 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6818 |
6819 | { &hf_ssh_subsystem_name_len,
6820 | { "Subsystem name length", "ssh.subsystem_name_length",
6821 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6822 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6823 |
6824 | { &hf_ssh_subsystem_name,
6825 | { "Subsystem name", "ssh.subsystem_name",
6826 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6827 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6828 |
6829 | { &hf_ssh_exec_cmd,
6830 | { "Command", "ssh.exec_command",
6831 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6832 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6833 |
6834 | { &hf_ssh_env_name,
6835 | { "Variable name", "ssh.env_name",
6836 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6837 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6838 |
6839 | { &hf_ssh_env_value,
6840 | { "Variable value", "ssh.env_value",
6841 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6842 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6843 |
6844 | { &hf_ssh_pty_term,
6845 | { "TERM environment variable", "ssh.pty_term",
6846 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6847 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6848 |
6849 | { &hf_ssh_pty_term_width_char,
6850 | { "Terminal width, characters", "ssh.pty_term_width_char",
6851 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6852 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6853 |
6854 | { &hf_ssh_pty_term_height_row,
6855 | { "Terminal height, rows", "ssh.pty_term_height_row",
6856 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6857 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6858 |
6859 | { &hf_ssh_pty_term_width_pixel,
6860 | { "Terminal width, pixels", "ssh.pty_term_width_pixel",
6861 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6862 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6863 |
6864 | { &hf_ssh_pty_term_height_pixel,
6865 | { "Terminal height, pixels", "ssh.pty_term_height_pixel",
6866 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6867 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6868 |
6869 | { &hf_ssh_pty_term_modes_len,
6870 | { "Encoded Terminal Modes Length", "ssh.pty_term_modes_length",
6871 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6872 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6873 |
6874 | { &hf_ssh_pty_term_modes,
6875 | { "Encoded Terminal Modes", "ssh.pty_term_modes",
6876 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6877 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6878 |
6879 | { &hf_ssh_pty_term_mode,
6880 | { "Mode", "ssh.pty_term_mode",
6881 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6882 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6883 |
6884 | { &hf_ssh_pty_term_mode_opcode,
6885 | { "Opcode", "ssh.pty_term_mode.opcode",
6886 | FT_UINT8, BASE_DEC, VALS(ssh_tty_op_vals)((0 ? (const struct _value_string*)0 : ((ssh_tty_op_vals)))), 0x0,
6887 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6888 |
6889 | { &hf_ssh_pty_term_mode_vintr,
6890 | { "Interrupt character", "ssh.pty_term_mode.vintr",
6891 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6892 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6893 |
6894 | { &hf_ssh_pty_term_mode_vquit,
6895 | { "Quit character", "ssh.pty_term_mode.vquit",
6896 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6897 | "Sends SIGQUIT on POSIX systems", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6898 |
6899 | { &hf_ssh_pty_term_mode_verase,
6900 | { "Erase the character to the left of the cursor", "ssh.pty_term_mode.verase",
6901 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6902 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6903 |
6904 | { &hf_ssh_pty_term_mode_vkill,
6905 | { "Kill the current input line", "ssh.pty_term_mode.vkill",
6906 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6907 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6908 |
6909 | { &hf_ssh_pty_term_mode_veof,
6910 | { "End-of-file character", "ssh.pty_term_mode.veof",
6911 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6912 | "Sends EOF from the terminal", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6913 |
6914 | { &hf_ssh_pty_term_mode_veol,
6915 | { "End-of-line character", "ssh.pty_term_mode.veol",
6916 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6917 | "In additional to carriage return and/or line feed", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6918 |
6919 | { &hf_ssh_pty_term_mode_veol2,
6920 | { "Additional end-of-line character", "ssh.pty_term_mode.veol2",
6921 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6922 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6923 |
6924 | { &hf_ssh_pty_term_mode_vstart,
6925 | { "Continues paused output", "ssh.pty_term_mode.vstart",
6926 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6927 | "Normally Control-Q", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6928 |
6929 | { &hf_ssh_pty_term_mode_vstop,
6930 | { "Pauses output", "ssh.pty_term_mode.vstop",
6931 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6932 | "Normally Control-S", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6933 |
6934 | { &hf_ssh_pty_term_mode_vsusp,
6935 | { "Suspends the current program", "ssh.pty_term_mode.vsusp",
6936 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6937 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6938 |
6939 | { &hf_ssh_pty_term_mode_vdsusp,
6940 | { "Another suspend character", "ssh.pty_term_mode.vdsusp",
6941 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6942 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6943 |
6944 | { &hf_ssh_pty_term_mode_vreprint,
6945 | { "Reprints the current input line", "ssh.pty_term_mode.vreprint",
6946 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6947 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6948 |
6949 | { &hf_ssh_pty_term_mode_vwerase,
6950 | { "Erase a word to the left of the cursor", "ssh.pty_term_mode.vwerase",
6951 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6952 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6953 |
6954 | { &hf_ssh_pty_term_mode_vlnext,
6955 | { "Enter the next character typed literally", "ssh.pty_term_mode.vlnext",
6956 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6957 | "Even if a special character", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6958 |
6959 | { &hf_ssh_pty_term_mode_vflush,
6960 | { "Character to flush output", "ssh.pty_term_mode.vflush",
6961 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6962 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6963 |
6964 | { &hf_ssh_pty_term_mode_vswtch,
6965 | { "Switch to a different shell layer", "ssh.pty_term_mode.vswtch",
6966 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6967 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6968 |
6969 | { &hf_ssh_pty_term_mode_vstatus,
6970 | { "Print system status line", "ssh.pty_term_mode.vstatus",
6971 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6972 | "Load, command, pid, etc.", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6973 |
6974 | { &hf_ssh_pty_term_mode_vdiscard,
6975 | { "Toggles the flushing of terminal output", "ssh.pty_term_mode.vdiscard",
6976 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6977 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6978 |
6979 | { &hf_ssh_pty_term_mode_ignpar,
6980 | { "Ignore parity flag", "ssh.pty_term_mode.ignpar",
6981 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6982 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6983 |
6984 | { &hf_ssh_pty_term_mode_parmrk,
6985 | { "Mark parity and framing errors", "ssh.pty_term_mode.parmrk",
6986 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6987 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6988 |
6989 | { &hf_ssh_pty_term_mode_inpck,
6990 | { "Enable checking of parity errors", "ssh.pty_term_mode.inpck",
6991 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6992 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6993 |
6994 | { &hf_ssh_pty_term_mode_istrip,
6995 | { "Strip 8th bit off characters", "ssh.pty_term_mode.istrip",
6996 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6997 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6998 |
6999 | { &hf_ssh_pty_term_mode_inlcr,
7000 | { "Map NL into CR on input", "ssh.pty_term_mode.inlcr",
7001 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7002 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7003 |
7004 | { &hf_ssh_pty_term_mode_igncr,
7005 | { "Ignore CR on input", "ssh.pty_term_mode.igncr",
7006 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7007 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7008 |
7009 | { &hf_ssh_pty_term_mode_icrnl,
7010 | { "Map CR to NL on input", "ssh.pty_term_mode.icrnl",
7011 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7012 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7013 |
7014 | { &hf_ssh_pty_term_mode_iuclc,
7015 | { "Translate uppercase characters to lowercase", "ssh.pty_term_mode.iuclc",
7016 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7017 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7018 |
7019 | { &hf_ssh_pty_term_mode_ixon,
7020 | { "Enable output flow control", "ssh.pty_term_mode.ixon",
7021 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7022 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7023 |
7024 | { &hf_ssh_pty_term_mode_ixany,
7025 | { "Any char will restart after stop", "ssh.pty_term_mode.ixany",
7026 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7027 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7028 |
7029 | { &hf_ssh_pty_term_mode_ixoff,
7030 | { "Enable input flow control", "ssh.pty_term_mode.ixoff",
7031 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7032 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7033 |
7034 | { &hf_ssh_pty_term_mode_imaxbel,
7035 | { "Ring bell on input queue full", "ssh.pty_term_mode.imaxbel",
7036 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7037 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7038 |
7039 | { &hf_ssh_pty_term_mode_iutf8,
7040 | { "Terminal input and output is assumed to be encoded in UTF-8", "ssh.pty_term_mode.iutf8",
7041 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7042 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7043 |
7044 | { &hf_ssh_pty_term_mode_isig,
7045 | { "Enable signals INTR, QUIT, [D]SUSP", "ssh.pty_term_mode.isig",
7046 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7047 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7048 |
7049 | { &hf_ssh_pty_term_mode_icanon,
7050 | { "Canonicalize input lines", "ssh.pty_term_mode.icanon",
7051 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7052 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7053 |
7054 | { &hf_ssh_pty_term_mode_xcase,
7055 | { "Enable input and output of uppercase characters by preceding their lowercase equivalents with '\'", "ssh.pty_term_mode.xcase",
7056 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7057 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7058 |
7059 | { &hf_ssh_pty_term_mode_echo,
7060 | { "Enable echoing", "ssh.pty_term_mode.echo",
7061 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7062 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7063 |
7064 | { &hf_ssh_pty_term_mode_echoe,
7065 | { "Visually erase chars", "ssh.pty_term_mode.echoe",
7066 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7067 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7068 |
7069 | { &hf_ssh_pty_term_mode_echok,
7070 | { "Kill character discards current line", "ssh.pty_term_mode.echok",
7071 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7072 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7073 |
7074 | { &hf_ssh_pty_term_mode_echonl,
7075 | { "Echo NL even if ECHO is off", "ssh.pty_term_mode.echonl",
7076 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7077 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7078 |
7079 | { &hf_ssh_pty_term_mode_noflsh,
7080 | { "No flush after interrupt", "ssh.pty_term_mode.noflsh",
7081 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7082 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7083 |
7084 | { &hf_ssh_pty_term_mode_tostop,
7085 | { "Stop background jobs from output", "ssh.pty_term_mode.tostop",
7086 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7087 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7088 |
7089 | { &hf_ssh_pty_term_mode_iexten,
7090 | { "Enable extensions", "ssh.pty_term_mode.iexten",
7091 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7092 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7093 |
7094 | { &hf_ssh_pty_term_mode_echoctl,
7095 | { "Echo control characters as ^(Char)", "ssh.pty_term_mode.echoctl",
7096 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7097 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7098 |
7099 | { &hf_ssh_pty_term_mode_echoke,
7100 | { "Visual erase for line kill", "ssh.pty_term_mode.echoke",
7101 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7102 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7103 |
7104 | { &hf_ssh_pty_term_mode_pendin,
7105 | { "Retype pending input", "ssh.pty_term_mode.pendin",
7106 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7107 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7108 |
7109 | { &hf_ssh_pty_term_mode_opost,
7110 | { "Enable output processing", "ssh.pty_term_mode.opost",
7111 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7112 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7113 |
7114 | { &hf_ssh_pty_term_mode_olcuc,
7115 | { "Convert lowercase to uppercase", "ssh.pty_term_mode.olcuc",
7116 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7117 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7118 |
7119 | { &hf_ssh_pty_term_mode_onlcr,
7120 | { "Map NL to CR-NL", "ssh.pty_term_mode.onlcr",
7121 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7122 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7123 |
7124 | { &hf_ssh_pty_term_mode_ocrnl,
7125 | { "Translate carriage return to newline (output)", "ssh.pty_term_mode.ocrnl",
7126 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7127 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7128 |
7129 | { &hf_ssh_pty_term_mode_onocr,
7130 | { "Translate newline to carriage-return newline (output)", "ssh.pty_term_mode.onocr",
7131 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7132 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7133 |
7134 | { &hf_ssh_pty_term_mode_onlret,
7135 | { "Newline performs a carriage return (output)", "ssh.pty_term_mode.onlret",
7136 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7137 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7138 |
7139 | { &hf_ssh_pty_term_mode_cs7,
7140 | { "7 bit mode", "ssh.pty_term_mode.cs7",
7141 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7142 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7143 |
7144 | { &hf_ssh_pty_term_mode_cs8,
7145 | { "8 bit mode", "ssh.pty_term_mode.cs8",
7146 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7147 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7148 |
7149 | { &hf_ssh_pty_term_mode_parenb,
7150 | { "Parity enable", "ssh.pty_term_mode.parenb",
7151 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7152 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7153 |
7154 | { &hf_ssh_pty_term_mode_parodd,
7155 | { "Odd parity", "ssh.pty_term_mode.parodd",
7156 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7157 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7158 |
7159 | { &hf_ssh_pty_term_mode_ispeed,
7160 | { "Input baud rate", "ssh.pty_term_mode.ispeed",
7161 | FT_UINT32, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_bit_sec)((0 ? (const struct unit_name_string*)0 : ((&units_bit_sec )))), 0x0,
7162 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7163 |
7164 | { &hf_ssh_pty_term_mode_ospeed,
7165 | { "Output baud rate", "ssh.pty_term_mode.ospeed",
7166 | FT_UINT32, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_bit_sec)((0 ? (const struct unit_name_string*)0 : ((&units_bit_sec )))), 0x0,
7167 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7168 |
7169 | { &hf_ssh_pty_term_mode_value,
7170 | { "Value", "ssh.pty_term_mode.value",
7171 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7172 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7173 |
7174 | { &hf_ssh_exit_status,
7175 | { "Exit status", "ssh.exit_status",
7176 | FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
7177 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7178 |
7179 | { &hf_ssh_channel_window_adjust,
7180 | { "Bytes to add", "ssh.channel_window_adjust",
7181 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7182 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7183 |
7184 | { &hf_ssh_channel_data_len,
7185 | { "Data length", "ssh.channel_data_length",
7186 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7187 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7188 |
7189 | { &hf_ssh_channel_data_type_code,
7190 | { "Data Type Code", "ssh.channel_data_type_code",
7191 | FT_UINT32, BASE_DEC, VALS(ssh_channel_data_type_code_vals)((0 ? (const struct _value_string*)0 : ((ssh_channel_data_type_code_vals )))), 0x0,
7192 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7193 |
7194 | { &hf_ssh_reassembled_in,
7195 | { "Reassembled PDU in frame", "ssh.reassembled_in",
7196 | FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7197 | "The PDU that doesn't end in this segment is reassembled in this frame", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7198 |
7199 | { &hf_ssh_reassembled_length,
7200 | { "Reassembled PDU length", "ssh.reassembled.length",
7201 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7202 | "The total length of the reassembled payload", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7203 |
7204 | { &hf_ssh_reassembled_data,
7205 | { "Reassembled PDU data", "ssh.reassembled.data",
7206 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
7207 | "The payload of multiple reassembled SSH segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7208 |
7209 | { &hf_ssh_segments,
7210 | { "Reassembled SSH segments", "ssh.segments",
7211 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
7212 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7213 |
7214 | { &hf_ssh_segment,
7215 | { "SSH segment", "ssh.segment",
7216 | FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7217 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7218 |
7219 | { &hf_ssh_segment_overlap,
7220 | { "Segment overlap", "ssh.segment.overlap",
7221 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7222 | "Segment overlaps with other segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7223 |
7224 | { &hf_ssh_segment_overlap_conflict,
7225 | { "Conflicting data in segment overlap", "ssh.segment.overlap.conflict",
7226 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7227 | "Overlapping segments contained conflicting data", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7228 |
7229 | { &hf_ssh_segment_multiple_tails,
7230 | { "Multiple tail segments found", "ssh.segment.multipletails",
7231 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7232 | "Several tails were found when reassembling the pdu", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7233 |
7234 | { &hf_ssh_segment_too_long_fragment,
7235 | { "Segment too long", "ssh.segment.toolongfragment",
7236 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7237 | "Segment contained data past end of the pdu", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7238 |
7239 | { &hf_ssh_segment_error,
7240 | { "Reassembling error", "ssh.segment.error",
7241 | FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7242 | "Reassembling error due to illegal segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7243 |
7244 | { &hf_ssh_segment_count,
7245 | { "Segment count", "ssh.segment.count",
7246 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7247 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7248 |
7249 | { &hf_ssh_segment_data,
7250 | { "SSH segment data", "ssh.segment.data",
7251 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
7252 | "The payload of a single SSH segment", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7253 |
7254 | { &hf_ssh_hybrid_blob_client,
7255 | { "Hybrid Key Exchange Blob Client", "ssh.kex_hybrid_blob_client",
7256 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, "Client post-quantum hybrid blob", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7257 | },
7258 |
7259 | { &hf_ssh_hybrid_blob_client_len,
7260 | { "Hybrid Key Exchange Blob Client Length", "ssh.kex_hybrid_blob_client_len",
7261 | 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) }
7262 | },
7263 |
7264 | { &hf_ssh_hybrid_blob_server,
7265 | { "Hybrid Key Exchange Blob Server", "ssh.kex_hybrid_blob_server",
7266 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, "Server post-quantum hybrid blob", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7267 | },
7268 |
7269 | { &hf_ssh_hybrid_blob_server_len,
7270 | { "Hybrid Key Exchange Blob Server Length", "ssh.kex_hybrid_blob_server_len",
7271 | 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) }
7272 | },
7273 |
7274 | { &hf_ssh_pq_kem_client,
7275 | { "Client PQ KEM Public Key", "ssh.kex.pq_kem_client",
7276 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
7277 | "Post-quantum key (client)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7278 | },
7279 |
7280 | { &hf_ssh_pq_kem_server,
7281 | { "Server PQ KEM Response", "ssh.kex.pq_kem_server",
7282 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
7283 | "Post-quantum ciphertext (server response)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7284 | },
7285 |
7286 | };
7287 |
7288 | static int *ett[] = {
7289 | &ett_ssh,
7290 | &ett_key_exchange,
7291 | &ett_key_exchange_host_key,
7292 | &ett_key_exchange_host_sig,
7293 | &ett_extension,
7294 | &ett_userauth_pk_blob,
7295 | &ett_userauth_pk_signature,
7296 | &ett_term_modes,
7297 | &ett_term_mode,
7298 | &ett_ssh1,
7299 | &ett_ssh2,
7300 | &ett_key_init,
7301 | &ett_ssh_segments,
7302 | &ett_ssh_pqhybrid_client, // added for PQ hybrid CLIENT dissection
7303 | &ett_ssh_pqhybrid_server, // added for PQ hybrid SERVER dissection
7304 | &ett_ssh_segment
7305 | };
7306 |
7307 | static ei_register_info ei[] = {
7308 | { &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)}} }},
7309 | { &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)}} }},
7310 | { &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)}} }},
7311 | { &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)}} }},
7312 | { &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)}} }},
7313 | { &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)}} }},
7314 | { &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)}} }},
7315 | { &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)}} }},
7316 |
7317 | };
7318 | module_t *ssh_module;
7319 | expert_module_t *expert_ssh;
7320 |
7321 | proto_ssh = proto_register_protocol("SSH Protocol", "SSH", "ssh");
7322 | proto_register_field_array(proto_ssh, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));
7323 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
7324 | expert_ssh = expert_register_protocol(proto_ssh);
7325 | expert_register_field_array(expert_ssh, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0]));
7326 |
7327 | #ifdef SSH_DECRYPT_DEBUG
7328 | ssh_module = prefs_register_protocol(proto_ssh, ssh_prefs_apply_cb);
7329 | #else
7330 | ssh_module = prefs_register_protocol(proto_ssh, NULL((void*)0));
7331 | #endif
7332 | prefs_register_bool_preference(ssh_module, "desegment_buffers",
7333 | "Reassemble SSH buffers spanning multiple TCP segments",
7334 | "Whether the SSH dissector should reassemble SSH buffers spanning multiple TCP segments. "
7335 | "To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
7336 | &ssh_desegment);
7337 | prefs_register_bool_preference(ssh_module, "ignore_ssh_mac_failed",
7338 | "Ignore Message Authentication Code (MAC) failure",
7339 | "For troubleshooting purposes, decrypt even if the "
7340 | "Message Authentication Code (MAC) check fails.",
7341 | &ssh_ignore_mac_failed);
7342 |
7343 | ssh_master_key_map = g_hash_table_new_full(ssh_hash, ssh_equal, ssh_free_glib_allocated_bignum, ssh_free_glib_allocated_entry);
7344 | prefs_register_filename_preference(ssh_module, "keylog_file", "Key log filename",
7345 | "The path to the file which contains a list of key exchange secrets in the following format:\n"
7346 | "\"<hex-encoded-cookie> <PRIVATE_KEY|SHARED_SECRET> <hex-encoded-key>\" (without quotes or leading spaces).\n",
7347 | &pref_keylog_file, false0);
7348 |
7349 | prefs_register_filename_preference(ssh_module, "debug_file", "SSH debug file",
7350 | "Redirect SSH debug to the file specified. Leave empty to disable debugging "
7351 | "or use \"" SSH_DEBUG_USE_STDERR"-" "\" to redirect output to stderr.",
7352 | &ssh_debug_file_name, true1);
7353 |
7354 | secrets_register_type(SECRETS_TYPE_SSH0x5353484b, ssh_secrets_block_callback);
7355 |
7356 | ssh_handle = register_dissector("ssh", dissect_ssh, proto_ssh);
7357 | reassembly_table_register(&ssh_reassembly_table, &tcp_reassembly_table_functions);
7358 | register_shutdown_routine(ssh_shutdown);
7359 | }
7360 |
7361 | void
7362 | proto_reg_handoff_ssh(void)
7363 | {
7364 | #ifdef SSH_DECRYPT_DEBUG
7365 | ssh_set_debug(ssh_debug_file_name);
7366 | #endif
7367 | dissector_add_uint_range_with_preference("tcp.port", TCP_RANGE_SSH"22", ssh_handle);
7368 | dissector_add_uint("sctp.port", SCTP_PORT_SSH22, ssh_handle);
7369 | dissector_add_uint("sctp.ppi", SSH_PAYLOAD_PROTOCOL_ID45, ssh_handle);
7370 | sftp_handle = find_dissector_add_dependency("sftp", proto_ssh);
7371 | data_text_lines_handle = find_dissector_add_dependency("data-text-lines", proto_ssh);
7372 |
7373 | heur_dissector_add("tcp", dissect_ssh_heur, "SSH over TCP", "ssh_tcp", proto_ssh, HEURISTIC_ENABLE);
7374 | }
7375 |
7376 | /*
7377 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
7378 | *
7379 | * Local variables:
7380 | * c-basic-offset: 4
7381 | * tab-width: 8
7382 | * indent-tabs-mode: nil
7383 | * End:
7384 | *
7385 | * vi: set shiftwidth=4 tabstop=8 expandtab:
7386 | * :indentSize=4:tabSize=8:noTabs=true:
7387 | */