### Bug Summary

File: | epan/dissectors/packet-ssh.c
Warning: | line 2655, 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/2025-12-31-100335-3583-1 -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 | int 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 | int offset, proto_tree *tree, int is_response, unsigned * version,
2232 | bool_Bool *need_desegmentation)
2233 | {
2234 | unsigned remain_length;
2235 | int linelen, protolen;
2236 |
2237 | /*
2238 | * If the first packet do not contain the banner,
2239 | * it is dump in the middle of a flow or not a ssh at all
2240 | */
2241 | if (tvb_strncaseeql(tvb, offset, "SSH-", 4) != 0) {
2242 | offset = ssh_dissect_encrypted_packet(tvb, pinfo,
2243 | &global_data->peer_data[is_response], offset, tree);
2244 | return offset;
2245 | }
2246 |
2247 | if (!is_response) {
2248 | if (tvb_strncaseeql(tvb, offset, "SSH-2.", 6) == 0) {
2249 | *(version) = SSH_VERSION_22;
2250 | } else if (tvb_strncaseeql(tvb, offset, "SSH-1.99-", 9) == 0) {
2251 | *(version) = SSH_VERSION_22;
2252 | } else if (tvb_strncaseeql(tvb, offset, "SSH-1.", 6) == 0) {
2253 | *(version) = SSH_VERSION_11;
2254 | }
2255 | }
2256 |
2257 | /*
2258 | * We use "tvb_ensure_captured_length_remaining()" to make sure there
2259 | * actually *is* data remaining.
2260 | *
2261 | * This means we're guaranteed that "remain_length" is positive.
2262 | */
2263 | remain_length = tvb_ensure_captured_length_remaining(tvb, offset);
2264 | /*linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, false);
2265 | */
2266 | linelen = tvb_find_uint8(tvb, offset, -1, '\n');
2267 |
2268 | if (ssh_desegment && pinfo->can_desegment) {
2269 | if (linelen == -1 || remain_length < (unsigned)linelen-offset) {
2270 | pinfo->desegment_offset = offset;
2271 | pinfo->desegment_len = linelen-remain_length;
2272 | *need_desegmentation = true1;
2273 | return offset;
2274 | }
2275 | }
2276 | if (linelen == -1) {
2277 | /* XXX - reassemble across segment boundaries? */
2278 | linelen = remain_length;
2279 | protolen = linelen;
2280 | } else {
2281 | linelen = linelen - offset + 1;
2282 |
2283 | if (linelen > 1 && tvb_get_uint8(tvb, offset + linelen - 2) == '\r')
2284 | protolen = linelen - 2;
2285 | else
2286 | protolen = linelen - 1;
2287 | }
2288 |
2289 | col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Protocol (%s)",
2290 | tvb_format_text(pinfo->pool, tvb, offset, protolen));
2291 |
2292 | // V_C / V_S (client and server identification strings) RFC4253 4.2
2293 | // format: SSH-protoversion-softwareversion SP comments [CR LF not incl.]
2294 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2295 | uint8_t *data = (uint8_t *)tvb_memdup(pinfo->pool, tvb, offset, protolen);
2296 | if(!is_response){
2297 | ssh_hash_buffer_put_string(global_data->kex_client_version, data, protolen);
2298 | }else{
2299 | ssh_hash_buffer_put_string(global_data->kex_server_version, data, protolen);
2300 | }
2301 | }
2302 |
2303 | proto_tree_add_item(tree, hf_ssh_protocol,
2304 | tvb, offset, protolen, ENC_ASCII0x00000000);
2305 | offset += linelen;
2306 | return offset;
2307 | }
2308 |
2309 | static void
2310 | ssh_set_mac_length(struct ssh_peer_data *peer_data)
2311 | {
2312 | char *size_str;
2313 | uint32_t size = 0;
2314 | char *mac_name = peer_data->mac;
2315 | char *strip;
2316 |
2317 | if (!mac_name)
2318 | return;
2319 |
2320 | /* wmem_strdup() never returns NULL */
2321 | mac_name = wmem_strdup(NULL((void*)0), (const char *)mac_name);
2322 |
2323 | /* strip trailing "-etm@openssh.com" or "@openssh.com" */
2324 | strip = strstr(mac_name, "-etm@openssh.com");
2325 | if (strip) {
2326 | peer_data->length_is_plaintext = 1;
2327 | *strip = '\0';
2328 | }
2329 | else {
2330 | strip = strstr(mac_name, "@openssh.com");
2331 | if (strip) *strip = '\0';
2332 | }
2333 |
2334 | size_str = g_strrstr(mac_name, "-");
2335 | if (size_str && ws_strtou32(size_str + 1, NULL((void*)0), &size) && size > 0 && size % 8 == 0) {
2336 | peer_data->mac_length = size / 8;
2337 | }
2338 | else if (strcmp(mac_name, "hmac-sha1") == 0) {
2339 | peer_data->mac_length = 20;
2340 | }
2341 | else if (strcmp(mac_name, "hmac-md5") == 0) {
2342 | peer_data->mac_length = 16;
2343 | }
2344 | else if (strcmp(mac_name, "hmac-ripemd160") == 0) {
2345 | peer_data->mac_length = 20;
2346 | }
2347 | else if (strcmp(mac_name, "none") == 0) {
2348 | peer_data->mac_length = 0;
2349 | }
2350 |
2351 | wmem_free(NULL((void*)0), mac_name);
2352 | }
2353 |
2354 | static void ssh_set_kex_specific_dissector(struct ssh_flow_data *global_data)
2355 | {
2356 | const char *kex_name = global_data->kex;
2357 |
2358 | if (!kex_name) return;
2359 |
2360 | if (strcmp(kex_name, "diffie-hellman-group-exchange-sha1") == 0 ||
2361 | strcmp(kex_name, "diffie-hellman-group-exchange-sha256") == 0)
2362 | {
2363 | global_data->kex_specific_dissector = ssh_dissect_kex_dh_gex;
2364 | }
2365 | 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-" ) ) ||
2366 | strcmp(kex_name, "curve25519-sha256@libssh.org") == 0 ||
2367 | strcmp(kex_name, "curve25519-sha256") == 0 ||
2368 | strcmp(kex_name, "curve448-sha512") == 0)
2369 | {
2370 | global_data->kex_specific_dissector = ssh_dissect_kex_ecdh;
2371 | }
2372 | else if (strcmp(kex_name, "diffie-hellman-group14-sha256") == 0 ||
2373 | strcmp(kex_name, "diffie-hellman-group16-sha512") == 0 ||
2374 | strcmp(kex_name, "diffie-hellman-group18-sha512") == 0 ||
2375 | strcmp(kex_name, "diffie-hellman-group1-sha1") == 0 ||
2376 | strcmp(kex_name, "diffie-hellman-group14-sha1") == 0)
2377 | {
2378 | global_data->kex_specific_dissector = ssh_dissect_kex_dh;
2379 | }
2380 | else if (strcmp(kex_name, "mlkem768nistp256-sha256") == 0 ||
2381 | strcmp(kex_name, "mlkem1024nistp384-sha384") == 0)
2382 | {
2383 | global_data->kex_specific_dissector = ssh_dissect_kex_hybrid;
2384 | }
2385 | else if (strcmp(kex_name, "sntrup761x25519-sha512") == 0 ||
2386 | strcmp(kex_name, "mlkem768x25519-sha256") == 0)
2387 | /* ___add support for post-quantum hybrid KEM */
2388 | {
2389 | global_data->kex_specific_dissector = ssh_dissect_kex_pq_hybrid;
2390 | }
2391 | else
2392 | {
2393 | 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" , 2393, __func__, "NOT SUPPORTED OR UNKNOWN KEX DETECTED: ALGORITHM = %s" , kex_name); } } while (0);
2394 | }
2395 | }
2396 |
2397 | static int
2398 | ssh_gslist_compare_strings(const void *a, const void *b)
2399 | {
2400 | if (a == NULL((void*)0) && b == NULL((void*)0))
2401 | return 0;
2402 | if (a == NULL((void*)0))
2403 | return -1;
2404 | if (b == NULL((void*)0))
2405 | return 1;
2406 | return strcmp((const char*)a, (const char*)b);
2407 | }
2408 |
2409 | /* expects that *result is NULL */
2410 | static bool_Bool
2411 | ssh_choose_algo(char *client, char *server, char **result)
2412 | {
2413 | char **server_strings = NULL((void*)0);
2414 | char **client_strings = NULL((void*)0);
2415 | char **step;
2416 | GSList *server_list = NULL((void*)0);
2417 |
2418 | static const char* client_strict = "kex-strict-c-v00@openssh.com";
2419 | static const char* server_strict = "kex-strict-s-v00@openssh.com";
2420 | bool_Bool kex_strict = false0;
2421 |
2422 | if (!client || !server || !result || *result)
2423 | return false0;
2424 |
2425 | server_strings = g_strsplit(server, ",", 0);
2426 | for (step = server_strings; *step; step++) {
2427 | server_list = g_slist_append(server_list, *step);
2428 | }
2429 |
2430 | client_strings = g_strsplit(client, ",", 0);
2431 | for (step = client_strings; *step; step++) {
2432 | GSList *agreed;
2433 | if ((agreed = g_slist_find_custom(server_list, *step, ssh_gslist_compare_strings))) {
2434 | *result = wmem_strdup(wmem_file_scope(), (const char *)agreed->data);
2435 | break;
2436 | }
2437 | }
2438 |
2439 | /* Check for the OpenSSH strict key exchange extension designed to
2440 | * mitigate the Terrapin attack by resetting the packet sequence
2441 | * number to zero after a SSH2_MSG_NEWKEYS message.
2442 | * https://www.openssh.com/txt/release-9.6
2443 | * Also see PROTOCOL in the OpenSSH source distribution.
2444 | *
2445 | * OpenSSH says this is activated "when an endpoint that supports this
2446 | * extension observes this algorithm name in a peer's KEXINIT packet".
2447 | * We'll have to assume that any endpoint that supports this also
2448 | * indicates support for it in its own first SSH2_MSG_KEXINIT.
2449 | */
2450 | if (g_strv_contains((const char* const*)client_strings, client_strict) &&
2451 | g_strv_contains((const char* const*)server_strings, server_strict)) {
2452 |
2453 | kex_strict = true1;
2454 | }
2455 |
2456 | g_strfreev(client_strings);
2457 | g_slist_free(server_list);
2458 | g_strfreev(server_strings);
2459 |
2460 | return kex_strict;
2461 | }
2462 |
2463 | static int
2464 | ssh_dissect_key_init(tvbuff_t *tvb, packet_info *pinfo, int offset,
2465 | proto_tree *tree, int is_response, struct ssh_flow_data *global_data)
2466 | {
2467 | int start_offset = offset;
2468 | int payload_length;
2469 | wmem_strbuf_t *hassh_algo;
2470 | char *hassh;
2471 |
2472 | proto_item *tf, *ti;
2473 | proto_tree *key_init_tree;
2474 |
2475 | struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
2476 |
2477 | key_init_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_key_init, &tf, "Algorithms");
2478 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2479 | peer_data->bn_cookie = ssh_kex_make_bignum(tvb_get_ptr(tvb, offset, 16), 16);
2480 | }
2481 | proto_tree_add_item(key_init_tree, hf_ssh_cookie,
2482 | tvb, offset, 16, ENC_NA0x00000000);
2483 | offset += 16;
2484 |
2485 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2486 | hf_ssh_kex_algorithms_length, hf_ssh_kex_algorithms,
2487 | &peer_data->kex_proposal);
2488 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2489 | hf_ssh_server_host_key_algorithms_length,
2490 | hf_ssh_server_host_key_algorithms, NULL((void*)0));
2491 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2492 | hf_ssh_encryption_algorithms_client_to_server_length,
2493 | hf_ssh_encryption_algorithms_client_to_server,
2494 | &peer_data->enc_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2495 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2496 | hf_ssh_encryption_algorithms_server_to_client_length,
2497 | hf_ssh_encryption_algorithms_server_to_client,
2498 | &peer_data->enc_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2499 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2500 | hf_ssh_mac_algorithms_client_to_server_length,
2501 | hf_ssh_mac_algorithms_client_to_server,
2502 | &peer_data->mac_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2503 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2504 | hf_ssh_mac_algorithms_server_to_client_length,
2505 | hf_ssh_mac_algorithms_server_to_client,
2506 | &peer_data->mac_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2507 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2508 | hf_ssh_compression_algorithms_client_to_server_length,
2509 | hf_ssh_compression_algorithms_client_to_server,
2510 | &peer_data->comp_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2511 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2512 | hf_ssh_compression_algorithms_server_to_client_length,
2513 | hf_ssh_compression_algorithms_server_to_client,
2514 | &peer_data->comp_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2515 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2516 | hf_ssh_languages_client_to_server_length,
2517 | hf_ssh_languages_client_to_server, NULL((void*)0));
2518 | offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2519 | hf_ssh_languages_server_to_client_length,
2520 | hf_ssh_languages_server_to_client, NULL((void*)0));
2521 |
2522 | proto_tree_add_item(key_init_tree, hf_ssh_first_kex_packet_follows,
2523 | tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
2524 | offset+=1;
2525 |
2526 | proto_tree_add_item(key_init_tree, hf_ssh_kex_reserved,
2527 | tvb, offset, 4, ENC_NA0x00000000);
2528 | offset+=4;
2529 |
2530 | hassh_algo = wmem_strbuf_new(pinfo->pool, "");
2531 | if(!is_response) {
2532 | wmem_strbuf_append_printf(hassh_algo, "%s;%s;%s;%s", peer_data->kex_proposal, peer_data->enc_proposals[CLIENT_TO_SERVER_PROPOSAL0],
2533 | peer_data->mac_proposals[CLIENT_TO_SERVER_PROPOSAL0], peer_data->comp_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2534 | hassh = g_compute_checksum_for_string(G_CHECKSUM_MD5, wmem_strbuf_get_str(hassh_algo), wmem_strbuf_get_len(hassh_algo));
2535 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hassh_algo, tvb, offset, 0, wmem_strbuf_get_str(hassh_algo));
2536 | proto_item_set_generated(ti);
2537 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hassh, tvb, offset, 0, hassh);
2538 | proto_item_set_generated(ti);
2539 | g_free(hassh);
2540 | } else {
2541 | wmem_strbuf_append_printf(hassh_algo, "%s;%s;%s;%s", peer_data->kex_proposal, peer_data->enc_proposals[SERVER_TO_CLIENT_PROPOSAL1],
2542 | peer_data->mac_proposals[SERVER_TO_CLIENT_PROPOSAL1], peer_data->comp_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2543 | hassh = g_compute_checksum_for_string(G_CHECKSUM_MD5, wmem_strbuf_get_str(hassh_algo), wmem_strbuf_get_len(hassh_algo));
2544 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hasshserver_algo, tvb, offset, 0, wmem_strbuf_get_str(hassh_algo));
2545 | proto_item_set_generated(ti);
2546 | ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hasshserver, tvb, offset, 0, hassh);
2547 | proto_item_set_generated(ti);
2548 | g_free(hassh);
2549 | }
2550 |
2551 | if (global_data->peer_data[CLIENT_PEER_DATA0].kex_proposal &&
2552 | global_data->peer_data[SERVER_PEER_DATA1].kex_proposal &&
2553 | !global_data->kex)
2554 | {
2555 | /* Note: we're ignoring first_kex_packet_follows. */
2556 | global_data->ext_kex_strict = ssh_choose_algo(
2557 | global_data->peer_data[CLIENT_PEER_DATA0].kex_proposal,
2558 | global_data->peer_data[SERVER_PEER_DATA1].kex_proposal,
2559 | &global_data->kex);
2560 | ssh_set_kex_specific_dissector(global_data);
2561 | }
2562 |
2563 | payload_length = offset - start_offset;
2564 |
2565 | if (tf != NULL((void*)0)) {
2566 | proto_item_set_len(tf, payload_length);
2567 | }
2568 |
2569 | // I_C / I_S (client and server SSH_MSG_KEXINIT payload) RFC4253 4.2
2570 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2571 | uint8_t *data = (uint8_t *)wmem_alloc(pinfo->pool, payload_length + 1);
2572 | tvb_memcpy(tvb, data + 1, start_offset, payload_length);
2573 | data[0] = SSH_MSG_KEXINIT20;
2574 | if(is_response){
2575 | ssh_hash_buffer_put_string(global_data->kex_server_key_exchange_init, data, payload_length + 1);
2576 | }else{
2577 | // Reset array while REKEY: sanitize client key
2578 | global_data->kex_client_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
2579 | ssh_hash_buffer_put_string(global_data->kex_client_key_exchange_init, data, payload_length + 1);
2580 | }
2581 | }
2582 |
2583 | return offset;
2584 | }
2585 |
2586 | static int
2587 | ssh_dissect_proposal(tvbuff_t *tvb, int offset, proto_tree *tree,
2588 | int hf_index_length, int hf_index_value, char **store)
2589 | {
2590 | uint32_t len = tvb_get_ntohl(tvb, offset);
2591 | proto_tree_add_uint(tree, hf_index_length, tvb, offset, 4, len);
2592 | offset += 4;
2593 |
2594 | proto_tree_add_item(tree, hf_index_value, tvb, offset, len,
2595 | ENC_ASCII0x00000000);
2596 | if (store)
2597 | *store = (char *) tvb_get_string_enc(wmem_file_scope(), tvb, offset, len, ENC_ASCII0x00000000);
2598 | offset += len;
2599 |
2600 | return offset;
2601 | }
2602 |
2603 | static void
2604 | ssh_keylog_read_file(void)
2605 | {
2606 | if (!pref_keylog_file || !*pref_keylog_file) {
5 | ← | Assuming 'pref_keylog_file' is non-null | →
6 | ← | Assuming the condition is false | →
2607 | ws_debug("no keylog file preference set")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2607, __func__, "no keylog file preference set"); } } while (0);
2608 | return;
2609 | }
2610 |
2611 | 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 | →
2612 | pref_keylog_file)) {
2613 | ssh_keylog_reset();
2614 | g_hash_table_remove_all(ssh_master_key_map);
2615 | }
2616 |
2617 | if (!ssh_keylog_file) {
10 | ← | Assuming 'ssh_keylog_file' is non-null | →
11 | ← | Taking false branch | →
2618 | ssh_keylog_file = ws_fopenfopen(pref_keylog_file, "r");
2619 | if (!ssh_keylog_file) {
2620 | 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" , 2621, __func__, "ssh: failed to open key log file %s: %s", pref_keylog_file , g_strerror((*__errno_location ()))); } } while (0)
2621 | pref_keylog_file, g_strerror(errno))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2621, __func__, "ssh: failed to open key log file %s: %s", pref_keylog_file , g_strerror((*__errno_location ()))); } } while (0);
2622 | return;
2623 | }
2624 | }
2625 |
2626 | /* File format: each line follows the format "<cookie> <type> <key>".
2627 | * <cookie> is the hex-encoded (client or server) 16 bytes cookie
2628 | * (32 characters) found in the SSH_MSG_KEXINIT of the endpoint whose
2629 | * private random is disclosed.
2630 | * <type> is either SHARED_SECRET or PRIVATE_KEY depending on the
2631 | * type of key provided. PRIVAT_KEY is only supported for DH,
2632 | * DH group exchange, and ECDH (including Curve25519) key exchanges.
2633 | * <key> is the private random number that is used to generate the DH
2634 | * negotiation (length depends on algorithm). In RFC4253 it is called
2635 | * x for the client and y for the server.
2636 | * For openssh and DH group exchange, it can be retrieved using
2637 | * DH_get0_key(kex->dh, NULL, &server_random)
2638 | * for groupN in file kexdh.c function kex_dh_compute_key
2639 | * for custom group in file kexgexs.c function input_kex_dh_gex_init
2640 | * For openssh and curve25519, it can be found in function kex_c25519_enc
2641 | * in variable server_key. One may also provide the shared secret
2642 | * directly if <type> is set to SHARED_SECRET.
2643 | *
2644 | * Example:
2645 | * 90d886612f9c35903db5bb30d11f23c2 PRIVATE_KEY DEF830C22F6C927E31972FFB20B46C96D0A5F2D5E7BE5A3A8804D6BFC431619ED10AF589EEDFF4750DEA00EFD7AFDB814B6F3528729692B1F2482041521AE9DC
2646 | */
2647 | for (;;) {
12 | ← | Loop condition is true. Entering loop body | →
2648 | // XXX - What is a reasonable max line length here? Note at a certain
2649 | // point we have to increase the maximum ssh_kex_make_bignum supports (not needed for post quantum material (pure binary)).
2650 | char buf[4096];// 4096 is needed for mlkem1024 private_key binary meterial: https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.203.pdf
2651 | buf[0] = 0;
2652 |
2653 | if (!fgets(buf, sizeof(buf), ssh_keylog_file)) {
13 | ← | Taking true branch | →
2654 | 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 | →
2655 | if (ferror(ssh_keylog_file)) {
15 | ← | Value of 'errno' was not checked and may be overwritten by function 'ferror'
2656 | 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" , 2656, __func__, "Error while reading %s, closing it.", pref_keylog_file ); } } while (0);
2657 | ssh_keylog_reset();
2658 | g_hash_table_remove_all(ssh_master_key_map);
2659 | }
2660 | break;
2661 | }
2662 |
2663 | size_t len = strlen(buf);
2664 | while(len>0 && (buf[len-1]=='\r' || buf[len-1]=='\n')){len-=1;buf[len]=0;}
2665 | 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" , 2665, __func__, "ssh: raw keylog line read: %s", buf); } } while (0);
2666 |
2667 | ssh_keylog_process_line(buf);
2668 | }
2669 | }
2670 |
2671 | static void
2672 | ssh_keylog_process_lines(const uint8_t *data, unsigned datalen)
2673 | {
2674 | const char *next_line = (const char *)data;
2675 | const char *line_end = next_line + datalen;
2676 | while (next_line && next_line < line_end) {
2677 | const char *line = next_line;
2678 | next_line = (const char *)memchr(line, '\n', line_end - line);
2679 | ssize_t linelen;
2680 |
2681 | if (next_line) {
2682 | linelen = next_line - line;
2683 | next_line++; /* drop LF */
2684 | } else {
2685 | linelen = (ssize_t)(line_end - line);
2686 | }
2687 | if (linelen > 0 && line[linelen - 1] == '\r') {
2688 | linelen--; /* drop CR */
2689 | }
2690 |
2691 | ssh_debug_printf(" checking keylog line: %.*s\n", (int)linelen, line);
2692 | 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" , 2692, __func__, "ssh: about to process line: %.*s", (int)linelen , line); } } while (0);
2693 |
2694 | char * strippedline = g_strndup(line, linelen);
2695 | ssh_keylog_process_line(strippedline);
2696 | g_free(strippedline);
2697 | }
2698 | }
2699 |
2700 | static void
2701 | ssh_keylog_process_line(const char *line)
2702 | {
2703 | ws_noisy("ssh: process line: %s", line)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 2703, __func__, "ssh: process line: %s", line); } } while ( 0);
2704 |
2705 | char **split = g_strsplit(line, " ", 3);
2706 | char *cookie, *type, *key;
2707 | size_t cookie_len, key_len;
2708 |
2709 | if (g_strv_length(split) == 3) {
2710 | // New format: [hex-encoded cookie] [key type] [hex-encoded key material]
2711 | cookie = split[0];
2712 | type = split[1];
2713 | key = split[2];
2714 | } else if (g_strv_length(split) == 2) {
2715 | // Old format: [hex-encoded cookie] [hex-encoded private key]
2716 | 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" , 2716, __func__, "ssh keylog: detected old keylog format without explicit key type" ); } } while (0);
2717 | type = "PRIVATE_KEY";
2718 | cookie = split[0];
2719 | key = split[1];
2720 | } else {
2721 | ws_debug("ssh keylog: invalid format")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2721, __func__, "ssh keylog: invalid format"); } } while (0 );
2722 | g_strfreev(split);
2723 | return;
2724 | }
2725 |
2726 | key_len = strlen(key);
2727 | cookie_len = strlen(cookie);
2728 | if(key_len & 1){
2729 | 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" , 2729, __func__, "ssh keylog: invalid format (key should at least be even!)" ); } } while (0);
2730 | g_strfreev(split);
2731 | return;
2732 | }
2733 | if(cookie_len & 1){
2734 | 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" , 2734, __func__, "ssh keylog: invalid format (cookie should at least be even!)" ); } } while (0);
2735 | g_strfreev(split);
2736 | return;
2737 | }
2738 | ssh_bignum * bn_cookie = ssh_kex_make_bignum(NULL((void*)0), (unsigned)(cookie_len/2));
2739 | ssh_bignum * bn_priv = ssh_kex_make_bignum(NULL((void*)0), (unsigned)(key_len/2));
2740 | uint8_t c;
2741 | for (size_t i = 0; i < key_len/2; i ++) {
2742 | char v0 = key[i * 2];
2743 | int8_t h0 = ws_xton(v0);
2744 | char v1 = key[i * 2 + 1];
2745 | int8_t h1 = ws_xton(v1);
2746 |
2747 | if (h0==-1 || h1==-1) {
2748 | 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" , 2748, __func__, "ssh: can't process key, invalid hex number: %c%c" , v0, v1); } } while (0);
2749 | g_strfreev(split);
2750 | return;
2751 | }
2752 |
2753 | c = (h0 << 4) | h1;
2754 |
2755 | bn_priv->data[i] = c;
2756 | }
2757 | for (size_t i = 0; i < cookie_len/2; i ++) {
2758 | char v0 = cookie[i * 2];
2759 | int8_t h0 = ws_xton(v0);
2760 | char v1 = cookie[i * 2 + 1];
2761 | int8_t h1 = ws_xton(v1);
2762 |
2763 | if (h0==-1 || h1==-1) {
2764 | 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" , 2764, __func__, "ssh: can't process cookie, invalid hex number: %c%c" , v0, v1); } } while (0);
2765 | g_strfreev(split);
2766 | return;
2767 | }
2768 |
2769 | c = (h0 << 4) | h1;
2770 |
2771 | bn_cookie->data[i] = c;
2772 | }
2773 | ssh_bignum * bn_priv_ht = g_new(ssh_bignum, 1)((ssh_bignum *) g_malloc_n ((1), sizeof (ssh_bignum)));
2774 | bn_priv_ht->length = bn_priv->length;
2775 | bn_priv_ht->data = (uint8_t *) g_memdup2(bn_priv->data, bn_priv->length);
2776 | ssh_bignum * bn_cookie_ht = g_new(ssh_bignum, 1)((ssh_bignum *) g_malloc_n ((1), sizeof (ssh_bignum)));
2777 | bn_cookie_ht->length = bn_cookie->length;
2778 | bn_cookie_ht->data = (uint8_t *) g_memdup2(bn_cookie->data, bn_cookie->length);
2779 |
2780 | char * type_ht = (char *) g_memdup2(type, strlen(type) + 1);
2781 | 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 )));
2782 | entry_ht->type = type_ht;
2783 | entry_ht->key_material = bn_priv_ht;
2784 | g_hash_table_insert(ssh_master_key_map, bn_cookie_ht, entry_ht);
2785 | g_strfreev(split);
2786 | }
2787 |
2788 | static void
2789 | ssh_keylog_reset(void)
2790 | {
2791 | if (ssh_keylog_file) {
2792 | fclose(ssh_keylog_file);
2793 | ssh_keylog_file = NULL((void*)0);
2794 | }
2795 | }
2796 |
2797 | static unsigned
2798 | ssh_kex_type(char *type)
2799 | {
2800 | if (type) {
2801 | 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") )) {
2802 | return SSH_KEX_CURVE255190x00010000;
2803 | }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" ) )) {
2804 | return SSH_KEX_SNTRUP761X255190x00040000;
2805 | }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" ) )) {
2806 | return SSH_KEX_MLKEM768X255190x00050000;
2807 | }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") )) {
2808 | return SSH_KEX_DH_GEX0x00020000;
2809 | }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" ) )) {
2810 | return SSH_KEX_DH_GROUP140x00030014;
2811 | }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" ) )) {
2812 | return SSH_KEX_DH_GROUP160x00030016;
2813 | }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" ) )) {
2814 | return SSH_KEX_DH_GROUP180x00030018;
2815 | }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" ) )) {
2816 | return SSH_KEX_DH_GROUP10x00030001;
2817 | }
2818 | }
2819 |
2820 | return 0;
2821 | }
2822 |
2823 | static unsigned
2824 | ssh_kex_hash_type(char *type_string)
2825 | {
2826 | 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" ) )) {
2827 | return SSH_KEX_HASH_SHA11;
2828 | }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") )) {
2829 | return SSH_KEX_HASH_SHA2562;
2830 | }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") )) {
2831 | return SSH_KEX_HASH_SHA2562;
2832 | }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") )) {
2833 | return SSH_KEX_HASH_SHA5124;
2834 | } else {
2835 | 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" , 2835, __func__, "hash type %s not supported", type_string); } } while (0);
2836 | return 0;
2837 | }
2838 | }
2839 |
2840 | static ssh_bignum *
2841 | ssh_kex_make_bignum(const uint8_t *data, unsigned length)
2842 | {
2843 | // 512 bytes (4096 bits) is the maximum bignum size we're supporting
2844 | // Actually we need 513 bytes, to make provision for signed values
2845 | // Diffie-Hellman group 18 has 8192 bits
2846 | if (length == 0 || length > 1025) {
2847 | return NULL((void*)0);
2848 | }
2849 |
2850 | ssh_bignum *bn = wmem_new0(wmem_file_scope(), ssh_bignum)((ssh_bignum*)wmem_alloc0((wmem_file_scope()), sizeof(ssh_bignum )));
2851 | bn->data = (uint8_t *)wmem_alloc0(wmem_file_scope(), length);
2852 |
2853 | if (data) {
2854 | memcpy(bn->data, data, length);
2855 | }
2856 |
2857 | bn->length = length;
2858 | return bn;
2859 | }
2860 |
2861 | static bool_Bool
2862 | ssh_read_e(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2863 | {
2864 | // store the client's public part (e) for later usage
2865 | uint32_t length = tvb_get_ntohl(tvb, offset);
2866 | global_data->kex_e = ssh_kex_make_bignum(NULL((void*)0), length);
2867 | if (!global_data->kex_e) {
2868 | return false0;
2869 | }
2870 | tvb_memcpy(tvb, global_data->kex_e->data, offset + 4, length);
2871 | return true1;
2872 | }
2873 |
2874 | static bool_Bool
2875 | ssh_read_f(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2876 | {
2877 | // store the server's public part (f) for later usage
2878 | uint32_t length = tvb_get_ntohl(tvb, offset);
2879 | global_data->kex_f = ssh_kex_make_bignum(NULL((void*)0), length);
2880 | if (!global_data->kex_f) {
2881 | return false0;
2882 | }
2883 | tvb_memcpy(tvb, global_data->kex_f->data, offset + 4, length);
2884 | return true1;
2885 | }
2886 |
2887 | static int // add support of client PQ hybrid key (e)
2888 | ssh_read_e_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2889 | {
2890 | // Read length of PQ client key
2891 | uint32_t length = tvb_get_ntohl(tvb, offset);
2892 |
2893 | // Sanity check
2894 | if (length == 0 || length > 65535) {
2895 | 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" , 2895, __func__, "ssh_read_e_pq: Invalid PQ key length: %u", length); } } while (0);
2896 | return false0;
2897 | }
2898 |
2899 | // Free any existing data (if dissecting multiple sessions)
2900 | wmem_free(wmem_file_scope(), global_data->kex_e_pq);
2901 |
2902 | // Allocate and store the PQ client key
2903 | global_data->kex_e_pq = (unsigned char *)wmem_alloc(wmem_file_scope(), length);
2904 | global_data->kex_e_pq_len = length;
2905 |
2906 | tvb_memcpy(tvb, global_data->kex_e_pq, offset + 4, length);
2907 |
2908 | 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" , 2908, __func__, "Stored %u bytes of client PQ key - stored new_offset_client: %d - offset: %d" , length, offset + 4 + length, offset); } } while (0);
2909 | return offset + 4 + length; // consuming packet (advancing offset)
2910 | }
2911 |
2912 | static int // add support of server PQ hybrid key (f)
2913 | ssh_read_f_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2914 | {
2915 | // Read length of PQ server key
2916 | uint32_t length = tvb_get_ntohl(tvb, offset);
2917 |
2918 | // Sanity check
2919 | if (length == 0 || length > 65535) {
2920 | 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" , 2920, __func__, "ssh_read_f_pq: Invalid PQ key length: %u", length); } } while (0);
2921 | return false0;
2922 | }
2923 |
2924 | // Free any existing data
2925 | wmem_free(wmem_file_scope(), global_data->kex_f_pq);
2926 |
2927 | // Allocate and store the PQ server key
2928 | global_data->kex_f_pq = (unsigned char *)wmem_alloc(wmem_file_scope(), length);
2929 | global_data->kex_f_pq_len = length;
2930 |
2931 | tvb_memcpy(tvb, global_data->kex_f_pq, offset + 4, length);
2932 |
2933 | 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" , 2933, __func__, "Stored %u bytes of server PQ key - stored new_offset_server: %d - offset: %d" , length, offset + 4 + length, offset); } } while (0);
2934 | return offset + 4 + length; // consuming packet (advancing offset)
2935 | }
2936 |
2937 |
2938 | static ssh_bignum *
2939 | ssh_read_mpint(tvbuff_t *tvb, int offset)
2940 | {
2941 | // store the DH group modulo (p) for later usage
2942 | int length = tvb_get_ntohl(tvb, offset);
2943 | ssh_bignum * bn = ssh_kex_make_bignum(NULL((void*)0), length);
2944 | if (!bn) {
2945 | ws_debug("invalid bignum length %u", length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 2945, __func__, "invalid bignum length %u", length); } } while (0);
2946 | return NULL((void*)0);
2947 | }
2948 | tvb_memcpy(tvb, bn->data, offset + 4, length);
2949 | return bn;
2950 | }
2951 |
2952 | static void
2953 | ssh_keylog_hash_write_secret(struct ssh_flow_data *global_data, wmem_allocator_t* tmp_allocator)
2954 | {
2955 | /*
2956 | * This computation is defined differently for each key exchange method:
2957 | * https://tools.ietf.org/html/rfc4253#page-23
2958 | * https://tools.ietf.org/html/rfc5656#page-8
2959 | * https://tools.ietf.org/html/rfc4419#page-4
2960 | * All key exchange methods:
2961 | * https://www.iana.org/assignments/ssh-parameters/ssh-parameters.xhtml#ssh-parameters-16
2962 | */
2963 |
2964 | gcry_md_hd_t hd;
2965 | ssh_key_map_entry_t *entry;
2966 | ssh_bignum *secret = NULL((void*)0);
2967 | int length;
2968 | bool_Bool client_cookie = false0;
2969 |
2970 | ssh_keylog_read_file();
4 | ← | Calling 'ssh_keylog_read_file' | →
2971 |
2972 | unsigned kex_type = ssh_kex_type(global_data->kex);
2973 | unsigned kex_hash_type = ssh_kex_hash_type(global_data->kex);
2974 |
2975 | entry = (ssh_key_map_entry_t *)g_hash_table_lookup(ssh_master_key_map, global_data->peer_data[SERVER_PEER_DATA1].bn_cookie);
2976 | if (!entry) {
2977 | entry = (ssh_key_map_entry_t *)g_hash_table_lookup(ssh_master_key_map, global_data->peer_data[CLIENT_PEER_DATA0].bn_cookie);
2978 | client_cookie = true1;
2979 | }
2980 | if (!entry) {
2981 | 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" , 2981, __func__, "ssh decryption: no entry in keylog file for this session" ); } } while (0);
2982 | global_data->do_decrypt = false0;
2983 | return;
2984 | }
2985 |
2986 | if (!strcmp(entry->type, "PRIVATE_KEY")) {
2987 | if (client_cookie) {
2988 | secret = ssh_kex_shared_secret(kex_type, global_data->kex_f, entry->key_material, global_data->kex_gex_p);
2989 | } else {
2990 | secret = ssh_kex_shared_secret(kex_type, global_data->kex_e, entry->key_material, global_data->kex_gex_p);
2991 | }
2992 | } else if (!strcmp(entry->type, "SHARED_SECRET")) {
2993 | secret = ssh_kex_make_bignum(entry->key_material->data, entry->key_material->length);
2994 | } else {
2995 | 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" , 2995, __func__, "ssh decryption: unknown key type in keylog file" ); } } while (0);
2996 | global_data->do_decrypt = false0;
2997 | return;
2998 | }
2999 |
3000 | if (!secret) {
3001 | 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" , 3001, __func__, "ssh decryption: no key material for this session" ); } } while (0);
3002 | global_data->do_decrypt = false0;
3003 | return;
3004 | }
3005 |
3006 | // shared secret data needs to be written as an mpint, and we need it later
3007 | if (kex_type == SSH_KEX_SNTRUP761X255190x00040000 || kex_type == SSH_KEX_MLKEM768X255190x00050000) {
3008 | // Reset array while REKEY: sanitize shared_secret:
3009 | global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
3010 | // For PQ KEMs: use shared_secret as-is, whether SHARED_SECRET or PRIVATE_KEY
3011 | // Do NOT prepend 0x00 (OpenSSH already encodes correctly for PQ KEM)
3012 | ssh_hash_buffer_put_string(global_data->kex_shared_secret, secret->data, secret->length);
3013 | } else {
3014 | // For all other KEX types (e.g., curve25519, ecdh-sha2, etc.)
3015 | // Pad with 0x00 if MSB is set, to comply with mpint format (RFC 4251)
3016 | if (secret->data[0] & 0x80) { // Stored in Big endian
3017 | length = secret->length + 1;
3018 | uint8_t *tmp = (uint8_t *)wmem_alloc0(tmp_allocator, length);
3019 | memcpy(tmp + 1, secret->data, secret->length);
3020 | tmp[0] = 0;
3021 | secret->data = tmp;
3022 | secret->length = length;
3023 | }
3024 | // Reset array while REKEY: sanitize shared_secret:
3025 | global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
3026 | ssh_hash_buffer_put_string(global_data->kex_shared_secret, secret->data, secret->length);
3027 | }
3028 |
3029 | wmem_array_t * kex_gex_p = wmem_array_new(tmp_allocator, 1);
3030 | 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);}
3031 | wmem_array_t * kex_gex_g = wmem_array_new(tmp_allocator, 1);
3032 | 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);}
3033 | wmem_array_t * kex_e = wmem_array_new(tmp_allocator, 1);
3034 | if(global_data->kex_e){ssh_hash_buffer_put_string(kex_e, global_data->kex_e->data, global_data->kex_e->length);}
3035 | wmem_array_t * kex_f = wmem_array_new(tmp_allocator, 1);
3036 | if(global_data->kex_f){ssh_hash_buffer_put_string(kex_f, global_data->kex_f->data, global_data->kex_f->length);}
3037 | wmem_array_t * kex_e_pq = wmem_array_new(tmp_allocator, 1);
3038 | 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);}
3039 | wmem_array_t * kex_f_pq = wmem_array_new(tmp_allocator, 1);
3040 | 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);}
3041 |
3042 | wmem_array_t * kex_hash_buffer = wmem_array_new(tmp_allocator, 1);
3043 | 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));
3044 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_client_version), wmem_array_get_count(global_data->kex_client_version));
3045 | 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));
3046 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_server_version), wmem_array_get_count(global_data->kex_server_version));
3047 | 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));
3048 | 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));
3049 | 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));
3050 | 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));
3051 | 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));
3052 | 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));
3053 | if(kex_type==SSH_KEX_DH_GEX0x00020000){
3054 | 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));
3055 | 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));
3056 | 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));
3057 | 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));
3058 | 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));
3059 | 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));
3060 | ssh_print_data("key modulo (p)", (const unsigned char *)wmem_array_get_raw(kex_gex_p), wmem_array_get_count(kex_gex_p));
3061 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_gex_p), wmem_array_get_count(kex_gex_p));
3062 | ssh_print_data("key base (g)", (const unsigned char *)wmem_array_get_raw(kex_gex_g), wmem_array_get_count(kex_gex_g));
3063 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_gex_g), wmem_array_get_count(kex_gex_g));
3064 | ssh_print_data("key client (e)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3065 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3066 | ssh_print_data("key server (f)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3067 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3068 | }
3069 | 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){
3070 | ssh_print_data("key client (e)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3071 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3072 | ssh_print_data("key server (f)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3073 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3074 | }
3075 | if(kex_type==SSH_KEX_CURVE255190x00010000){
3076 | ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3077 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3078 | ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3079 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3080 | }
3081 | if (kex_type==SSH_KEX_SNTRUP761X255190x00040000){ // Add support of sntrup761x25519
3082 | ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3083 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3084 | ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3085 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3086 | ws_noisy("Switch to SSH_KEX_SNTRUP761X25519")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 3086, __func__, "Switch to SSH_KEX_SNTRUP761X25519"); } } while (0);
3087 | }
3088 | if (kex_type==SSH_KEX_MLKEM768X255190x00050000){ // Add support of mlkem768x25519
3089 | ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3090 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3091 | ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3092 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3093 | ws_noisy("Switch to SSH_KEX_MLKEM768X25519")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 3093, __func__, "Switch to SSH_KEX_MLKEM768X25519"); } } while (0);
3094 | }
3095 | 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));
3096 | wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_shared_secret), wmem_array_get_count(global_data->kex_shared_secret));
3097 |
3098 | ssh_print_data("exchange", (const unsigned char *)wmem_array_get_raw(kex_hash_buffer), wmem_array_get_count(kex_hash_buffer));
3099 |
3100 | unsigned hash_len = 32;
3101 | if(kex_hash_type==SSH_KEX_HASH_SHA11) {
3102 | gcry_md_open(&hd, GCRY_MD_SHA1, 0);
3103 | hash_len = 20;
3104 | } else if(kex_hash_type==SSH_KEX_HASH_SHA2562) {
3105 | gcry_md_open(&hd, GCRY_MD_SHA256, 0);
3106 | hash_len = 32;
3107 | } else if(kex_hash_type==SSH_KEX_HASH_SHA5124) {
3108 | gcry_md_open(&hd, GCRY_MD_SHA512, 0);
3109 | hash_len = 64;
3110 | } else {
3111 | 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" , 3111, __func__, "kex_hash_type type %d not supported", kex_hash_type ); } } while (0);
3112 | return;
3113 | }
3114 | uint8_t *exchange_hash = (uint8_t *)wmem_alloc0(wmem_file_scope(), hash_len);
3115 | gcry_md_write(hd, wmem_array_get_raw(kex_hash_buffer), wmem_array_get_count(kex_hash_buffer));
3116 | memcpy(exchange_hash, gcry_md_read(hd, 0), hash_len);
3117 | gcry_md_close(hd);
3118 | ssh_print_data("hash", exchange_hash, hash_len);
3119 | global_data->secret = secret;
3120 | ssh_derive_symmetric_keys(secret, exchange_hash, hash_len, global_data);
3121 | }
3122 |
3123 | // the purpose of this function is to deal with all different kex methods
3124 | static ssh_bignum *
3125 | ssh_kex_shared_secret(int kex_type, ssh_bignum *pub, ssh_bignum *priv, ssh_bignum *modulo)
3126 | {
3127 | DISSECTOR_ASSERT(pub != NULL)((void) ((pub != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c" , 3127, "pub != ((void*)0)"))));
3128 | DISSECTOR_ASSERT(priv != NULL)((void) ((priv != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c" , 3128, "priv != ((void*)0)"))));
3129 |
3130 | ssh_bignum *secret = ssh_kex_make_bignum(NULL((void*)0), pub->length);
3131 | if (!secret) {
3132 | ws_debug("invalid key length %u", pub->length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3132, __func__, "invalid key length %u", pub->length); } } while (0);
3133 | return NULL((void*)0);
3134 | }
3135 |
3136 | if(kex_type==SSH_KEX_DH_GEX0x00020000){
3137 | if (modulo == NULL((void*)0)) {
3138 | ws_debug("Missing group modulo")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3138, __func__, "Missing group modulo"); } } while (0);
3139 | return NULL((void*)0);
3140 | }
3141 | gcry_mpi_t b = NULL((void*)0);
3142 | gcry_mpi_scan(&b, GCRYMPI_FMT_USG, pub->data, pub->length, NULL((void*)0));
3143 | gcry_mpi_t d = NULL((void*)0), e = NULL((void*)0), m = NULL((void*)0);
3144 | size_t result_len = 0;
3145 | d = gcry_mpi_new(pub->length*8);
3146 | gcry_mpi_scan(&e, GCRYMPI_FMT_USG, priv->data, priv->length, NULL((void*)0));
3147 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, modulo->data, modulo->length, NULL((void*)0));
3148 | gcry_mpi_powm(d, b, e, m); // gcry_mpi_powm(d, b, e, m) => d = b^e % m
3149 | gcry_mpi_print(GCRYMPI_FMT_USG, secret->data, secret->length, &result_len, d);
3150 | secret->length = (unsigned)result_len; // Should not be larger than what fits in a 32-bit unsigned integer...
3151 | gcry_mpi_release(d);
3152 | gcry_mpi_release(b);
3153 | gcry_mpi_release(e);
3154 | gcry_mpi_release(m);
3155 |
3156 | }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){
3157 | gcry_mpi_t m = NULL((void*)0);
3158 | if(kex_type==SSH_KEX_DH_GROUP10x00030001){
3159 | static const uint8_t p[] = {
3160 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3161 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3162 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3163 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3164 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3165 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3166 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3167 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE6, 0x53, 0x81, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3168 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3169 | }else if(kex_type==SSH_KEX_DH_GROUP140x00030014){
3170 | //p:
3171 | static const uint8_t p[] = {
3172 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3173 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3174 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3175 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3176 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3177 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3178 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3179 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3180 | 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3181 | 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3182 | 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3183 | 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3184 | 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3185 | 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3186 | 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3187 | 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAC, 0xAA, 0x68, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
3188 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3189 | }else if(kex_type==SSH_KEX_DH_GROUP160x00030016){
3190 | //p:
3191 | static const uint8_t p[] = {
3192 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3193 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3194 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3195 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3196 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3197 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3198 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3199 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3200 | 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3201 | 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3202 | 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3203 | 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3204 | 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3205 | 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3206 | 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3207 | 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D, 0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33,
3208 | 0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64, 0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A,
3209 | 0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, 0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7,
3210 | 0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, 0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D,
3211 | 0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B, 0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64,
3212 | 0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64, 0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C,
3213 | 0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, 0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2,
3214 | 0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, 0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E,
3215 | 0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01, 0x1A, 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7,
3216 | 0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA, 0x5B, 0x26, 0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C,
3217 | 0x1A, 0x94, 0x68, 0x34, 0xB6, 0x15, 0x0B, 0xDA, 0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,
3218 | 0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9, 0x2E, 0x8E, 0xFC, 0x14, 0x1F, 0xBE, 0xCA, 0xA6,
3219 | 0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D, 0x99, 0xB2, 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2,
3220 | 0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7, 0xED, 0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF,
3221 | 0xB8, 0x1B, 0xDD, 0x76, 0x21, 0x70, 0x48, 0x1C, 0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9,
3222 | 0x93, 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1, 0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6, 0xC0, 0x8F,
3223 | 0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x06, 0x31, 0x99, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3224 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3225 | }else if(kex_type==SSH_KEX_DH_GROUP180x00030018){
3226 | //p:
3227 | static const uint8_t p[] = {
3228 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3229 | 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3230 | 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3231 | 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3232 | 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3233 | 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3234 | 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3235 | 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3236 | 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3237 | 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3238 | 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3239 | 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3240 | 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3241 | 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3242 | 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3243 | 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D, 0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33,
3244 | 0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64, 0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A,
3245 | 0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, 0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7,
3246 | 0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, 0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D,
3247 | 0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B, 0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64,
3248 | 0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64, 0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C,
3249 | 0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, 0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2,
3250 | 0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, 0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E,
3251 | 0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01, 0x1A, 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7,
3252 | 0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA, 0x5B, 0x26, 0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C,
3253 | 0x1A, 0x94, 0x68, 0x34, 0xB6, 0x15, 0x0B, 0xDA, 0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,
3254 | 0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9, 0x2E, 0x8E, 0xFC, 0x14, 0x1F, 0xBE, 0xCA, 0xA6,
3255 | 0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D, 0x99, 0xB2, 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2,
3256 | 0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7, 0xED, 0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF,
3257 | 0xB8, 0x1B, 0xDD, 0x76, 0x21, 0x70, 0x48, 0x1C, 0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9,
3258 | 0x93, 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1, 0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6, 0xC0, 0x8F,
3259 | 0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x02, 0x84, 0x92, 0x36, 0xC3, 0xFA, 0xB4, 0xD2, 0x7C, 0x70, 0x26,
3260 | 0xC1, 0xD4, 0xDC, 0xB2, 0x60, 0x26, 0x46, 0xDE, 0xC9, 0x75, 0x1E, 0x76, 0x3D, 0xBA, 0x37, 0xBD,
3261 | 0xF8, 0xFF, 0x94, 0x06, 0xAD, 0x9E, 0x53, 0x0E, 0xE5, 0xDB, 0x38, 0x2F, 0x41, 0x30, 0x01, 0xAE,
3262 | 0xB0, 0x6A, 0x53, 0xED, 0x90, 0x27, 0xD8, 0x31, 0x17, 0x97, 0x27, 0xB0, 0x86, 0x5A, 0x89, 0x18,
3263 | 0xDA, 0x3E, 0xDB, 0xEB, 0xCF, 0x9B, 0x14, 0xED, 0x44, 0xCE, 0x6C, 0xBA, 0xCE, 0xD4, 0xBB, 0x1B,
3264 | 0xDB, 0x7F, 0x14, 0x47, 0xE6, 0xCC, 0x25, 0x4B, 0x33, 0x20, 0x51, 0x51, 0x2B, 0xD7, 0xAF, 0x42,
3265 | 0x6F, 0xB8, 0xF4, 0x01, 0x37, 0x8C, 0xD2, 0xBF, 0x59, 0x83, 0xCA, 0x01, 0xC6, 0x4B, 0x92, 0xEC,
3266 | 0xF0, 0x32, 0xEA, 0x15, 0xD1, 0x72, 0x1D, 0x03, 0xF4, 0x82, 0xD7, 0xCE, 0x6E, 0x74, 0xFE, 0xF6,
3267 | 0xD5, 0x5E, 0x70, 0x2F, 0x46, 0x98, 0x0C, 0x82, 0xB5, 0xA8, 0x40, 0x31, 0x90, 0x0B, 0x1C, 0x9E,
3268 | 0x59, 0xE7, 0xC9, 0x7F, 0xBE, 0xC7, 0xE8, 0xF3, 0x23, 0xA9, 0x7A, 0x7E, 0x36, 0xCC, 0x88, 0xBE,
3269 | 0x0F, 0x1D, 0x45, 0xB7, 0xFF, 0x58, 0x5A, 0xC5, 0x4B, 0xD4, 0x07, 0xB2, 0x2B, 0x41, 0x54, 0xAA,
3270 | 0xCC, 0x8F, 0x6D, 0x7E, 0xBF, 0x48, 0xE1, 0xD8, 0x14, 0xCC, 0x5E, 0xD2, 0x0F, 0x80, 0x37, 0xE0,
3271 | 0xA7, 0x97, 0x15, 0xEE, 0xF2, 0x9B, 0xE3, 0x28, 0x06, 0xA1, 0xD5, 0x8B, 0xB7, 0xC5, 0xDA, 0x76,
3272 | 0xF5, 0x50, 0xAA, 0x3D, 0x8A, 0x1F, 0xBF, 0xF0, 0xEB, 0x19, 0xCC, 0xB1, 0xA3, 0x13, 0xD5, 0x5C,
3273 | 0xDA, 0x56, 0xC9, 0xEC, 0x2E, 0xF2, 0x96, 0x32, 0x38, 0x7F, 0xE8, 0xD7, 0x6E, 0x3C, 0x04, 0x68,
3274 | 0x04, 0x3E, 0x8F, 0x66, 0x3F, 0x48, 0x60, 0xEE, 0x12, 0xBF, 0x2D, 0x5B, 0x0B, 0x74, 0x74, 0xD6,
3275 | 0xE6, 0x94, 0xF9, 0x1E, 0x6D, 0xBE, 0x11, 0x59, 0x74, 0xA3, 0x92, 0x6F, 0x12, 0xFE, 0xE5, 0xE4,
3276 | 0x38, 0x77, 0x7C, 0xB6, 0xA9, 0x32, 0xDF, 0x8C, 0xD8, 0xBE, 0xC4, 0xD0, 0x73, 0xB9, 0x31, 0xBA,
3277 | 0x3B, 0xC8, 0x32, 0xB6, 0x8D, 0x9D, 0xD3, 0x00, 0x74, 0x1F, 0xA7, 0xBF, 0x8A, 0xFC, 0x47, 0xED,
3278 | 0x25, 0x76, 0xF6, 0x93, 0x6B, 0xA4, 0x24, 0x66, 0x3A, 0xAB, 0x63, 0x9C, 0x5A, 0xE4, 0xF5, 0x68,
3279 | 0x34, 0x23, 0xB4, 0x74, 0x2B, 0xF1, 0xC9, 0x78, 0x23, 0x8F, 0x16, 0xCB, 0xE3, 0x9D, 0x65, 0x2D,
3280 | 0xE3, 0xFD, 0xB8, 0xBE, 0xFC, 0x84, 0x8A, 0xD9, 0x22, 0x22, 0x2E, 0x04, 0xA4, 0x03, 0x7C, 0x07,
3281 | 0x13, 0xEB, 0x57, 0xA8, 0x1A, 0x23, 0xF0, 0xC7, 0x34, 0x73, 0xFC, 0x64, 0x6C, 0xEA, 0x30, 0x6B,
3282 | 0x4B, 0xCB, 0xC8, 0x86, 0x2F, 0x83, 0x85, 0xDD, 0xFA, 0x9D, 0x4B, 0x7F, 0xA2, 0xC0, 0x87, 0xE8,
3283 | 0x79, 0x68, 0x33, 0x03, 0xED, 0x5B, 0xDD, 0x3A, 0x06, 0x2B, 0x3C, 0xF5, 0xB3, 0xA2, 0x78, 0xA6,
3284 | 0x6D, 0x2A, 0x13, 0xF8, 0x3F, 0x44, 0xF8, 0x2D, 0xDF, 0x31, 0x0E, 0xE0, 0x74, 0xAB, 0x6A, 0x36,
3285 | 0x45, 0x97, 0xE8, 0x99, 0xA0, 0x25, 0x5D, 0xC1, 0x64, 0xF3, 0x1C, 0xC5, 0x08, 0x46, 0x85, 0x1D,
3286 | 0xF9, 0xAB, 0x48, 0x19, 0x5D, 0xED, 0x7E, 0xA1, 0xB1, 0xD5, 0x10, 0xBD, 0x7E, 0xE7, 0x4D, 0x73,
3287 | 0xFA, 0xF3, 0x6B, 0xC3, 0x1E, 0xCF, 0xA2, 0x68, 0x35, 0x90, 0x46, 0xF4, 0xEB, 0x87, 0x9F, 0x92,
3288 | 0x40, 0x09, 0x43, 0x8B, 0x48, 0x1C, 0x6C, 0xD7, 0x88, 0x9A, 0x00, 0x2E, 0xD5, 0xEE, 0x38, 0x2B,
3289 | 0xC9, 0x19, 0x0D, 0xA6, 0xFC, 0x02, 0x6E, 0x47, 0x95, 0x58, 0xE4, 0x47, 0x56, 0x77, 0xE9, 0xAA,
3290 | 0x9E, 0x30, 0x50, 0xE2, 0x76, 0x56, 0x94, 0xDF, 0xC8, 0x1F, 0x56, 0xE8, 0x80, 0xB9, 0x6E, 0x71,
3291 | 0x60, 0xC9, 0x80, 0xDD, 0x98, 0xED, 0xD3, 0xDF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3292 | gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3293 | }
3294 |
3295 | gcry_mpi_t b = NULL((void*)0);
3296 | gcry_mpi_scan(&b, GCRYMPI_FMT_USG, pub->data, pub->length, NULL((void*)0));
3297 | gcry_mpi_t d = NULL((void*)0), e = NULL((void*)0);
3298 | size_t result_len = 0;
3299 | d = gcry_mpi_new(pub->length*8);
3300 | gcry_mpi_scan(&e, GCRYMPI_FMT_USG, priv->data, priv->length, NULL((void*)0));
3301 | gcry_mpi_powm(d, b, e, m); // gcry_mpi_powm(d, b, e, m) => d = b^e % m
3302 | gcry_mpi_print(GCRYMPI_FMT_USG, secret->data, secret->length, &result_len, d);
3303 | secret->length = (unsigned)result_len; // Should not be larger than what fits in a 32-bit unsigned integer...
3304 | gcry_mpi_release(d);
3305 | gcry_mpi_release(b);
3306 | gcry_mpi_release(e);
3307 | gcry_mpi_release(m);
3308 | }else if(kex_type==SSH_KEX_CURVE255190x00010000){
3309 | if (crypto_scalarmult_curve25519(secret->data, priv->data, pub->data)) {
3310 | ws_debug("curve25519: can't compute shared secret")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3310, __func__, "curve25519: can't compute shared secret"); } } while (0);
3311 | return NULL((void*)0);
3312 | }
3313 | } else {
3314 | 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" , 3314, __func__, "kex_type type %d not supported", kex_type) ; } } while (0);
3315 | return 0;
3316 | }
3317 |
3318 | return secret;
3319 | }
3320 |
3321 | static char *
3322 | ssh_string(wmem_allocator_t* allocator, const uint8_t *string, unsigned length)
3323 | {
3324 | char *ssh_string = (char *)wmem_alloc(allocator, length + 4);
3325 | ssh_string[0] = (length >> 24) & 0xff;
3326 | ssh_string[1] = (length >> 16) & 0xff;
3327 | ssh_string[2] = (length >> 8) & 0xff;
3328 | ssh_string[3] = length & 0xff;
3329 | memcpy(ssh_string + 4, string, length);
3330 | return ssh_string;
3331 | }
3332 |
3333 | static void
3334 | ssh_hash_buffer_put_string(wmem_array_t *buffer, const uint8_t *string,
3335 | unsigned length)
3336 | {
3337 | if (!buffer) {
3338 | return;
3339 | }
3340 |
3341 | char *string_with_length = ssh_string(wmem_array_get_allocator(buffer), string, length);
3342 | wmem_array_append(buffer, string_with_length, length + 4);
3343 | }
3344 |
3345 | static void
3346 | ssh_hash_buffer_put_uint32(wmem_array_t *buffer, unsigned val)
3347 | {
3348 | if (!buffer) {
3349 | return;
3350 | }
3351 |
3352 | char buf[4];
3353 | buf[0] = (val >> 24); buf[1] = (val >> 16); buf[2] = (val >> 8); buf[3] = (val >> 0);
3354 | wmem_array_append(buffer, buf, 4);
3355 | }
3356 |
3357 | static void ssh_derive_symmetric_keys(ssh_bignum *secret, uint8_t *exchange_hash,
3358 | unsigned hash_length, struct ssh_flow_data *global_data)
3359 | {
3360 | if (!global_data->session_id) {
3361 | global_data->session_id = exchange_hash;
3362 | global_data->session_id_length = hash_length;
3363 | }
3364 |
3365 | unsigned int we_need = 0;
3366 | for(int peer_cnt=0;peer_cnt<2;peer_cnt++){
3367 | struct ssh_peer_data * peer_data = &global_data->peer_data[peer_cnt];
3368 | // required size of key depends on cipher used. chacha20 wants 64 bytes
3369 | unsigned need = 0;
3370 | if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3371 | need = 64;
3372 | } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id || CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id) {
3373 | need = 16;
3374 | } else if (CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id) {
3375 | need = 24;
3376 | } else if (CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
3377 | need = 32;
3378 | } else {
3379 | ssh_debug_printf("ssh: cipher (%d) is unknown or not set\n", peer_data->cipher_id);
3380 | ssh_debug_flush();
3381 | }
3382 | if(peer_data->mac_id == CIPHER_MAC_SHA2_2560x00020001){
3383 | need = 32;
3384 | }else{
3385 | ssh_debug_printf("ssh: MAC (%d) is unknown or not set\n", peer_data->mac_id);
3386 | ssh_debug_flush();
3387 | }
3388 | if (we_need<need) {
3389 | we_need = need;
3390 | }
3391 | }
3392 |
3393 | for (int i = 0; i < 6; i ++) {
3394 | ssh_derive_symmetric_key(secret, exchange_hash, hash_length,
3395 | 'A' + i, &global_data->new_keys[i], global_data, we_need);
3396 | if(i==0){ ssh_print_data("Initial IV client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3397 | }else if(i==1){ ssh_print_data("Initial IV server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3398 | }else if(i==2){ ssh_print_data("Encryption key client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3399 | }else if(i==3){ ssh_print_data("Encryption key server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3400 | }else if(i==4){ ssh_print_data("Integrity key client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3401 | }else if(i==5){ ssh_print_data("Integrity key server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3402 | }
3403 | }
3404 | }
3405 |
3406 | static void ssh_derive_symmetric_key(ssh_bignum *secret, const uint8_t *exchange_hash,
3407 | unsigned hash_length, char id, ssh_bignum *result_key,
3408 | struct ssh_flow_data *global_data, unsigned we_need)
3409 | {
3410 | gcry_md_hd_t hd;
3411 |
3412 | unsigned kex_hash_type = ssh_kex_hash_type(global_data->kex);
3413 | int algo = GCRY_MD_SHA256;
3414 | if(kex_hash_type==SSH_KEX_HASH_SHA11){
3415 | algo = GCRY_MD_SHA1;
3416 | }else if(kex_hash_type==SSH_KEX_HASH_SHA2562){
3417 | algo = GCRY_MD_SHA256;
3418 | }else if(kex_hash_type==SSH_KEX_HASH_SHA5124){
3419 | algo = GCRY_MD_SHA512;
3420 | }
3421 | unsigned len = gcry_md_get_algo_dlen(algo);
3422 |
3423 | result_key->data = (unsigned char *)wmem_alloc(wmem_file_scope(), we_need);
3424 |
3425 | char *secret_with_length = ssh_string(NULL((void*)0), secret->data, secret->length);
3426 |
3427 | if (gcry_md_open(&hd, algo, 0) == 0) {
3428 | gcry_md_write(hd, secret_with_length, secret->length + 4);
3429 | gcry_md_write(hd, exchange_hash, hash_length);
3430 | 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);
3431 | gcry_md_write(hd, global_data->session_id, hash_length);
3432 | unsigned add_length = MIN(len, we_need)(((len) < (we_need)) ? (len) : (we_need));
3433 | memcpy(result_key->data, gcry_md_read(hd, 0), add_length);
3434 | gcry_md_close(hd);
3435 | }
3436 |
3437 | // expand key
3438 | for (unsigned have = len; have < we_need; have += len) {
3439 | if (gcry_md_open(&hd, algo, 0) == 0) {
3440 | gcry_md_write(hd, secret_with_length, secret->length + 4);
3441 | gcry_md_write(hd, exchange_hash, hash_length);
3442 | gcry_md_write(hd, result_key->data+have-len, len);
3443 | unsigned add_length = MIN(len, we_need - have)(((len) < (we_need - have)) ? (len) : (we_need - have));
3444 | memcpy(result_key->data+have, gcry_md_read(hd, 0), add_length);
3445 | gcry_md_close(hd);
3446 | }
3447 | }
3448 | wmem_free(NULL((void*)0), secret_with_length);
3449 |
3450 | result_key->length = we_need;
3451 | }
3452 |
3453 | static void
3454 | ssh_choose_enc_mac(struct ssh_flow_data *global_data)
3455 | {
3456 | for(int peer_cnt=0;peer_cnt<2;peer_cnt++){
3457 | struct ssh_peer_data * peer_data = &global_data->peer_data[peer_cnt];
3458 | ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].enc_proposals[peer_cnt],
3459 | global_data->peer_data[SERVER_PEER_DATA1].enc_proposals[peer_cnt],
3460 | &peer_data->enc);
3461 | /* some ciphers have their own MAC so the "negotiated" one is meaningless */
3462 | if(peer_data->enc && (0 == strcmp(peer_data->enc, "aes128-gcm@openssh.com") ||
3463 | 0 == strcmp(peer_data->enc, "aes256-gcm@openssh.com"))) {
3464 | peer_data->mac = wmem_strdup(wmem_file_scope(), (const char *)"<implicit>");
3465 | peer_data->mac_length = 16;
3466 | peer_data->length_is_plaintext = 1;
3467 | }
3468 | else if(peer_data->enc && 0 == strcmp(peer_data->enc, "chacha20-poly1305@openssh.com")) {
3469 | peer_data->mac = wmem_strdup(wmem_file_scope(), (const char *)"<implicit>");
3470 | peer_data->mac_length = 16;
3471 | }
3472 | else {
3473 | ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].mac_proposals[peer_cnt],
3474 | global_data->peer_data[SERVER_PEER_DATA1].mac_proposals[peer_cnt],
3475 | &peer_data->mac);
3476 | ssh_set_mac_length(peer_data);
3477 | }
3478 | ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].comp_proposals[peer_cnt],
3479 | global_data->peer_data[SERVER_PEER_DATA1].comp_proposals[peer_cnt],
3480 | &peer_data->comp);
3481 | }
3482 |
3483 | ssh_decryption_set_cipher_id(&global_data->peer_data[CLIENT_PEER_DATA0]);
3484 | ssh_decryption_set_mac_id(&global_data->peer_data[CLIENT_PEER_DATA0]);
3485 | ssh_decryption_set_cipher_id(&global_data->peer_data[SERVER_PEER_DATA1]);
3486 | ssh_decryption_set_mac_id(&global_data->peer_data[SERVER_PEER_DATA1]);
3487 | }
3488 |
3489 | static void
3490 | ssh_decryption_set_cipher_id(struct ssh_peer_data *peer)
3491 | {
3492 | char *cipher_name = peer->enc;
3493 |
3494 | if (!cipher_name) {
3495 | peer->cipher = NULL((void*)0);
3496 | ws_debug("ERROR: cipher_name is NULL")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3496, __func__, "ERROR: cipher_name is NULL"); } } while (0 );
3497 | } else if (0 == strcmp(cipher_name, "chacha20-poly1305@openssh.com")) { // add chacha20-poly1305@openssh.com
3498 | peer->cipher_id = GCRY_CIPHER_CHACHA20;
3499 | } else if (0 == strcmp(cipher_name, "chacha20-poly1305")) { // add chacha20-poly1305
3500 | peer->cipher_id = GCRY_CIPHER_CHACHA20;
3501 | } else if (0 == strcmp(cipher_name, "aes128-gcm@openssh.com")) {
3502 | peer->cipher_id = CIPHER_AES128_GCM0x00040001;
3503 | } else if (0 == strcmp(cipher_name, "aes128-gcm")) {
3504 | peer->cipher_id = CIPHER_AES128_GCM0x00040001;
3505 | } else if (0 == strcmp(cipher_name, "aes256-gcm@openssh.com")) {
3506 | peer->cipher_id = CIPHER_AES256_GCM0x00040004;
3507 | } else if (0 == strcmp(cipher_name, "aes256-gcm")) {
3508 | peer->cipher_id = CIPHER_AES256_GCM0x00040004;
3509 | } else if (0 == strcmp(cipher_name, "aes128-cbc")) {
3510 | peer->cipher_id = CIPHER_AES128_CBC0x00020001;
3511 | } else if (0 == strcmp(cipher_name, "aes192-cbc")) {
3512 | peer->cipher_id = CIPHER_AES192_CBC0x00020002;
3513 | } else if (0 == strcmp(cipher_name, "aes256-cbc")) {
3514 | peer->cipher_id = CIPHER_AES256_CBC0x00020004;
3515 | } else if (0 == strcmp(cipher_name, "aes128-ctr")) {
3516 | peer->cipher_id = CIPHER_AES128_CTR0x00010001;
3517 | } else if (0 == strcmp(cipher_name, "aes192-ctr")) {
3518 | peer->cipher_id = CIPHER_AES192_CTR0x00010003;
3519 | } else if (0 == strcmp(cipher_name, "aes256-ctr")) {
3520 | peer->cipher_id = CIPHER_AES256_CTR0x00010004;
3521 | } else if (0 == strcmp(cipher_name, "none")) {
3522 | peer->cipher_id = CIPHER_NULL0x00080000;
3523 | peer->length_is_plaintext = 1;
3524 | } else {
3525 | peer->cipher = NULL((void*)0);
3526 | ws_debug("decryption not supported: %s", cipher_name)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3526, __func__, "decryption not supported: %s", cipher_name ); } } while (0);
3527 | }
3528 | }
3529 |
3530 | static void
3531 | ssh_decryption_set_mac_id(struct ssh_peer_data *peer)
3532 | {
3533 | char *mac_name = peer->mac;
3534 |
3535 | if (!mac_name) {
3536 | peer->mac = NULL((void*)0);
3537 | ws_debug("ERROR: mac_name is NULL")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3537, __func__, "ERROR: mac_name is NULL"); } } while (0);
3538 | } else if (0 == strcmp(mac_name, "hmac-sha2-256")) {
3539 | peer->mac_id = CIPHER_MAC_SHA2_2560x00020001;
3540 | } else {
3541 | 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" , 3541, __func__, "decryption MAC not supported: %s", mac_name ); } } while (0);
3542 | }
3543 | }
3544 |
3545 | static bool_Bool
3546 | gcry_cipher_destroy_cb(wmem_allocator_t *allocator _U___attribute__((unused)), wmem_cb_event_t event _U___attribute__((unused)), void *user_data)
3547 | {
3548 | gcry_cipher_hd_t hd = (gcry_cipher_hd_t)user_data;
3549 |
3550 | gcry_cipher_close(hd);
3551 |
3552 | return false0;
3553 | }
3554 |
3555 | static void
3556 | ssh_decryption_setup_cipher(struct ssh_peer_data *peer_data,
3557 | ssh_bignum *iv, ssh_bignum *key)
3558 | {
3559 | gcry_error_t err;
3560 | gcry_cipher_hd_t *hd1, *hd2;
3561 |
3562 | hd1 = &peer_data->cipher;
3563 | hd2 = &peer_data->cipher_2;
3564 |
3565 | if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3566 | if (gcry_cipher_open(hd1, GCRY_CIPHER_CHACHA20, GCRY_CIPHER_MODE_STREAM, 0) ||
3567 | gcry_cipher_open(hd2, GCRY_CIPHER_CHACHA20, GCRY_CIPHER_MODE_STREAM, 0)) {
3568 | gcry_cipher_close(*hd1);
3569 | gcry_cipher_close(*hd2);
3570 | 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" , 3570, __func__, "ssh: can't open chacha20 cipher handles"); } } while (0);
3571 | return;
3572 | }
3573 |
3574 | uint8_t k1[32];
3575 | uint8_t k2[32];
3576 | if(key->data){
3577 | memcpy(k1, key->data, 32);
3578 | memcpy(k2, key->data + 32, 32);
3579 | }else{
3580 | memset(k1, 0, 32);
3581 | memset(k2, 0, 32);
3582 | }
3583 |
3584 | ssh_debug_printf("ssh: cipher is chacha20\n");
3585 | ssh_print_data("key 1", k1, 32);
3586 | ssh_print_data("key 2", k2, 32);
3587 |
3588 | if ((err = gcry_cipher_setkey(*hd1, k1, 32))) {
3589 | gcry_cipher_close(*hd1);
3590 | 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" , 3590, __func__, "ssh: can't set chacha20 cipher key %s", gcry_strerror (err)); } } while (0);
3591 | return;
3592 | }
3593 |
3594 | if ((err = gcry_cipher_setkey(*hd2, k2, 32))) {
3595 | gcry_cipher_close(*hd1);
3596 | gcry_cipher_close(*hd2);
3597 | 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" , 3597, __func__, "ssh: can't set chacha20 cipher key %s", gcry_strerror (err)); } } while (0);
3598 | return;
3599 | }
3600 |
3601 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3602 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd2);
3603 |
3604 | } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id) {
3605 | int iKeyLen = CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id?16:CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id?24:32;
3606 | 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)) {
3607 | gcry_cipher_close(*hd1);
3608 | 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" , 3608, __func__, "ssh: can't open aes%d cipher handle", iKeyLen *8); } } while (0);
3609 | return;
3610 | }
3611 | uint8_t k1[32], iv1[16];
3612 | if(key->data){
3613 | memcpy(k1, key->data, iKeyLen);
3614 | }else{
3615 | memset(k1, 0, iKeyLen);
3616 | }
3617 | if(iv->data){
3618 | memcpy(iv1, iv->data, 16);
3619 | }else{
3620 | memset(iv1, 0, 16);
3621 | }
3622 |
3623 | ssh_debug_printf("ssh: cipher is aes%d-cbc\n", iKeyLen*8);
3624 | ssh_print_data("key", k1, iKeyLen);
3625 | ssh_print_data("iv", iv1, 16);
3626 |
3627 | if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3628 | gcry_cipher_close(*hd1);
3629 | 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" , 3629, __func__, "ssh: can't set aes%d cipher key", iKeyLen* 8); } } while (0);
3630 | 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" , 3630, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3631 | return;
3632 | }
3633 |
3634 | if ((err = gcry_cipher_setiv(*hd1, iv1, 16))) {
3635 | gcry_cipher_close(*hd1);
3636 | 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" , 3636, __func__, "ssh: can't set aes%d cipher iv", iKeyLen*8 ); } } while (0);
3637 | 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" , 3637, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3638 | return;
3639 | }
3640 |
3641 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3642 |
3643 | } else if (CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id) {
3644 | int iKeyLen = CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id?16:CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id?24:32;
3645 | 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)) {
3646 | gcry_cipher_close(*hd1);
3647 | 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" , 3647, __func__, "ssh: can't open aes%d cipher handle", iKeyLen *8); } } while (0);
3648 | return;
3649 | }
3650 | uint8_t k1[32], iv1[16];
3651 | if(key->data){
3652 | memcpy(k1, key->data, iKeyLen);
3653 | }else{
3654 | memset(k1, 0, iKeyLen);
3655 | }
3656 | if(iv->data){
3657 | memcpy(iv1, iv->data, 16);
3658 | }else{
3659 | memset(iv1, 0, 16);
3660 | }
3661 |
3662 | ssh_debug_printf("ssh: cipher is aes%d-ctr\n", iKeyLen*8);
3663 | ssh_print_data("key", k1, iKeyLen);
3664 | ssh_print_data("iv", iv1, 16);
3665 |
3666 | if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3667 | gcry_cipher_close(*hd1);
3668 | 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" , 3668, __func__, "ssh: can't set aes%d cipher key", iKeyLen* 8); } } while (0);
3669 | 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" , 3669, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3670 | return;
3671 | }
3672 |
3673 | if ((err = gcry_cipher_setctr(*hd1, iv1, 16))) {
3674 | gcry_cipher_close(*hd1);
3675 | 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" , 3675, __func__, "ssh: can't set aes%d cipher iv", iKeyLen*8 ); } } while (0);
3676 | 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" , 3676, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3677 | return;
3678 | }
3679 |
3680 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3681 |
3682 | } else if (CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
3683 | int iKeyLen = CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id?16:32;
3684 | 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)) {
3685 | gcry_cipher_close(*hd1);
3686 | 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" , 3686, __func__, "ssh: can't open aes%d cipher handle", iKeyLen *8); } } while (0);
3687 | return;
3688 | }
3689 |
3690 | uint8_t k1[32], iv2[12];
3691 | if(key->data){
3692 | memcpy(k1, key->data, iKeyLen);
3693 | }else{
3694 | memset(k1, 0, iKeyLen);
3695 | }
3696 | if(iv->data){
3697 | memcpy(peer_data->iv, iv->data, 12);
3698 | }else{
3699 | memset(iv2, 0, 12);
3700 | }
3701 |
3702 | ssh_debug_printf("ssh: cipher is aes%d-gcm\n", iKeyLen*8);
3703 | ssh_print_data("key", k1, iKeyLen);
3704 | ssh_print_data("iv", peer_data->iv, 12);
3705 |
3706 | if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3707 | gcry_cipher_close(*hd1);
3708 | 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" , 3708, __func__, "ssh: can't set aes%d cipher key", iKeyLen* 8); } } while (0);
3709 | 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" , 3709, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
3710 | return;
3711 | }
3712 |
3713 | wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3714 |
3715 | } else {
3716 | ssh_debug_printf("ssh: cipher (%d) is unknown or not set\n", peer_data->cipher_id);
3717 | }
3718 | }
3719 |
3720 | static void
3721 | ssh_decryption_setup_mac(struct ssh_peer_data *peer_data,
3722 | ssh_bignum *iv)
3723 | {
3724 | if(peer_data->mac_id == CIPHER_MAC_SHA2_2560x00020001){
3725 | if(iv->data){
3726 | memcpy(peer_data->hmac_iv, iv->data, 32);
3727 | }else{
3728 | memset(peer_data->hmac_iv, 0, 32);
3729 | }
3730 | peer_data->hmac_iv_len = 32;
3731 | ssh_debug_printf("ssh: mac is hmac-sha2-256\n");
3732 | ssh_print_data("iv", peer_data->hmac_iv, peer_data->hmac_iv_len);
3733 | }else{
3734 | ws_debug("ssh: unsupported MAC")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3734, __func__, "ssh: unsupported MAC"); } } while (0);
3735 | }
3736 | }
3737 |
3738 | /* libgcrypt wrappers for HMAC/message digest operations {{{ */
3739 | /* hmac abstraction layer */
3740 | #define SSH_HMACgcry_md_hd_t gcry_md_hd_t
3741 |
3742 | static inline int
3743 | ssh_hmac_init(SSH_HMACgcry_md_hd_t* md, const void * key, int len, int algo)
3744 | {
3745 | gcry_error_t err;
3746 | const char *err_str, *err_src;
3747 |
3748 | err = gcry_md_open(md,algo, GCRY_MD_FLAG_HMAC);
3749 | if (err != 0) {
3750 | err_str = gcry_strerror(err);
3751 | err_src = gcry_strsource(err);
3752 | ssh_debug_printf("ssh_hmac_init(): gcry_md_open failed %s/%s", err_str, err_src);
3753 | return -1;
3754 | }
3755 | err = gcry_md_setkey(*(md), key, len);
3756 | if (err != 0) {
3757 | err_str = gcry_strerror(err);
3758 | err_src = gcry_strsource(err);
3759 | ssh_debug_printf("ssh_hmac_init(): gcry_md_setkey(..., ..., %d) failed %s/%s", len, err_str, err_src);
3760 | return -1;
3761 | }
3762 | return 0;
3763 | }
3764 |
3765 | static inline void
3766 | ssh_hmac_update(SSH_HMACgcry_md_hd_t* md, const void* data, int len)
3767 | {
3768 | gcry_md_write(*(md), data, len);
3769 | }
3770 |
3771 | static inline void
3772 | ssh_hmac_final(SSH_HMACgcry_md_hd_t* md, unsigned char* data, unsigned* datalen)
3773 | {
3774 | int algo;
3775 | unsigned len;
3776 |
3777 | algo = gcry_md_get_algo (*(md));
3778 | len = gcry_md_get_algo_dlen(algo);
3779 | DISSECTOR_ASSERT(len <= *datalen)((void) ((len <= *datalen) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c" , 3779, "len <= *datalen"))));
3780 | memcpy(data, gcry_md_read(*(md), algo), len);
3781 | *datalen = len;
3782 | }
3783 |
3784 | static inline void
3785 | ssh_hmac_cleanup(SSH_HMACgcry_md_hd_t* md)
3786 | {
3787 | gcry_md_close(*(md));
3788 | }
3789 | /* libgcrypt wrappers for HMAC/message digest operations }}} */
3790 |
3791 | /* Decryption integrity check {{{ */
3792 |
3793 | static int
3794 | ssh_get_digest_by_id(unsigned mac_id)
3795 | {
3796 | if(mac_id==CIPHER_MAC_SHA2_2560x00020001){
3797 | return GCRY_MD_SHA256;
3798 | }
3799 | return -1;
3800 | }
3801 |
3802 | static void
3803 | ssh_calc_mac(struct ssh_peer_data *peer_data, uint32_t seqnr, uint8_t* data, uint32_t datalen, uint8_t* calc_mac)
3804 | {
3805 | SSH_HMACgcry_md_hd_t hm;
3806 | int md;
3807 | uint32_t len;
3808 | uint8_t buf[DIGEST_MAX_SIZE48];
3809 |
3810 | md=ssh_get_digest_by_id(peer_data->mac_id);
3811 | // ssl_debug_printf("ssh_check_mac mac type:%s md %d\n",
3812 | // ssl_cipher_suite_dig(decoder->cipher_suite)->name, md);
3813 |
3814 | memset(calc_mac, 0, DIGEST_MAX_SIZE48);
3815 |
3816 | if (md == -1) {
3817 | return;
3818 | }
3819 | if (ssh_hmac_init(&hm, peer_data->hmac_iv, peer_data->hmac_iv_len, md) != 0)
3820 | return;
3821 |
3822 | /* hash sequence number */
3823 | phtonu32(buf, seqnr);
3824 |
3825 | ssh_print_data("Mac IV", peer_data->hmac_iv, peer_data->hmac_iv_len);
3826 | ssh_print_data("Mac seq", buf, 4);
3827 | ssh_print_data("Mac data", data, datalen);
3828 |
3829 | ssh_hmac_update(&hm,buf,4);
3830 |
3831 | ssh_hmac_update(&hm,data,datalen);
3832 |
3833 | /* get digest and digest len*/
3834 | len = sizeof(buf);
3835 | ssh_hmac_final(&hm,buf,&len);
3836 | ssh_hmac_cleanup(&hm);
3837 | ssh_print_data("Mac", buf, len);
3838 | memcpy(calc_mac, buf, len);
3839 |
3840 | return;
3841 | }
3842 | /* Decryption integrity check }}} */
3843 |
3844 | static ssh_packet_info_t *
3845 | ssh_get_packet_info(packet_info *pinfo, bool_Bool is_response)
3846 | {
3847 | ssh_packet_info_t *packet = (ssh_packet_info_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_ssh, 0);
3848 | if(!packet){
3849 | packet = wmem_new0(wmem_file_scope(), ssh_packet_info_t)((ssh_packet_info_t*)wmem_alloc0((wmem_file_scope()), sizeof( ssh_packet_info_t)));
3850 | packet->from_server = is_response;
3851 | packet->messages = NULL((void*)0);
3852 | p_add_proto_data(wmem_file_scope(), pinfo, proto_ssh, 0, packet);
3853 | }
3854 | return packet;
3855 | }
3856 |
3857 | static unsigned
3858 | ssh_decrypt_packet(tvbuff_t *tvb, packet_info *pinfo,
3859 | struct ssh_peer_data *peer_data, int offset)
3860 | {
3861 | bool_Bool is_response = ssh_peer_data_from_server(peer_data);
3862 |
3863 | gcry_error_t err;
3864 | unsigned message_length = 0, seqnr;
3865 | uint8_t *plain = NULL((void*)0);
3866 | const uint8_t *mac;
3867 | unsigned mac_len, data_len = 0;
3868 | uint8_t calc_mac[DIGEST_MAX_SIZE48];
3869 | memset(calc_mac, 0, DIGEST_MAX_SIZE48);
3870 | unsigned remaining = tvb_captured_length_remaining(tvb, offset);
3871 |
3872 | mac_len = peer_data->mac_length > 0 ? peer_data->mac_length : 0;
3873 | seqnr = peer_data->sequence_number;
3874 |
3875 | /* General algorithm:
3876 | * 1. If there are not enough bytes for the packet_length, and we can
3877 | * do reassembly, ask for one more segment.
3878 | * 2. Retrieve packet_length (encrypted in some modes).
3879 | * 3. Sanity check packet_length (the field is 4 bytes, but packet_length
3880 | * is unlikely to be much larger than 32768, which provides good indication
3881 | * a packet is continuation data or, in some modes, failed decryption.
3882 | * https://www.rfc-editor.org/rfc/rfc4253.html#section-6.1 )
3883 | * 4. If there are not enough bytes for packet_length, and we can do
3884 | * reassembly, tell the TCP dissector how many more bytes we need.
3885 | * 5. If the packet is truncated and we cannot reassemble, at this
3886 | * point we conclude that it is the next SSH packet, and advance the
3887 | * sequence number, invocation_counter, etc. before throwing an exception.
3888 | * 6. If we do have all the data, we decrypt and check the MAC before
3889 | * doing all that. (XXX - Advancing seqnr regardless could make sense
3890 | * in some ciphers.)
3891 | * 7. Possibly the MAC should be checked before decryption in some ciphers
3892 | * if we have all the data; possibly there should be a "do not check the
3893 | * MAC" preference a la TLS.
3894 | */
3895 |
3896 | if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3897 | if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
3898 | /* Can do reassembly, and the packet length is split across
3899 | * segment boundaries. */
3900 | pinfo->desegment_offset = offset;
3901 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
3902 | return tvb_captured_length(tvb);
3903 | }
3904 |
3905 | const uint8_t *ctext = tvb_get_ptr(tvb, offset, 4);
3906 | uint8_t plain_length_buf[4];
3907 |
3908 | if (!ssh_decrypt_chacha20(peer_data->cipher_2, seqnr, 0, ctext, 4,
3909 | plain_length_buf, 4)) {
3910 | ws_debug("ERROR: could not decrypt packet len")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3910, __func__, "ERROR: could not decrypt packet len"); } } while (0);
3911 | return tvb_captured_length(tvb);
3912 | }
3913 |
3914 | message_length = pntohu32(plain_length_buf);
3915 |
3916 | ssh_debug_printf("chachapoly_crypt seqnr=%d [%u]\n", seqnr, message_length);
3917 |
3918 | ssh_debug_printf("%s plain for seq = %d len = %u\n", is_response?"s2c":"c2s", seqnr, message_length);
3919 | if (message_length > SSH_MAX_PACKET_LEN32768) {
3920 | 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" , 3920, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
3921 | return tvb_captured_length(tvb);
3922 | }
3923 | if (remaining < message_length + 4 + mac_len) {
3924 | // Need desegmentation; as "the chacha20-poly1305@openssh.com AEAD
3925 | // uses the sequence number as an initialisation vector (IV) to
3926 | // generate its per-packet MAC key and is otherwise stateless
3927 | // between packets," we need no special handling here.
3928 | // https://www.ietf.org/id/draft-miller-sshm-strict-kex-01.html
3929 | //
3930 | if (ssh_desegment && pinfo->can_desegment) {
3931 | pinfo->desegment_offset = offset;
3932 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
3933 | return tvb_captured_length(tvb);
3934 | }
3935 | // If we can't desegment, we will have an exception below in
3936 | // the tvb_get_ptr. Advance the sequence number so that the
3937 | // next SSH packet start will decrypt correctly.
3938 | peer_data->sequence_number++;
3939 | }
3940 |
3941 | plain = (uint8_t *)wmem_alloc0(pinfo->pool, message_length+4);
3942 | memcpy(plain, plain_length_buf, 4);
3943 | const uint8_t *ctext2 = tvb_get_ptr(tvb, offset+4, message_length);
3944 |
3945 | /* XXX - "Once the entire packet has been received, the MAC MUST be
3946 | * checked before decryption," but we decrypt first.
3947 | * https://datatracker.ietf.org/doc/html/draft-ietf-sshm-chacha20-poly1305-01
3948 | */
3949 | if (!ssh_decrypt_chacha20(peer_data->cipher, seqnr, 1, ctext2,
3950 | message_length, plain+4, message_length)) {
3951 | ws_debug("ERROR: could not decrypt packet payload")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3951, __func__, "ERROR: could not decrypt packet payload"); } } while (0);
3952 | return tvb_captured_length(tvb);
3953 | }
3954 |
3955 | mac = tvb_get_ptr(tvb, offset + 4 + message_length, mac_len);
3956 | uint8_t poly_key[32], iv[16];
3957 |
3958 | memset(poly_key, 0, 32);
3959 | memset(iv, 0, 8);
3960 | phtonu64(iv+8, (uint64_t)seqnr);
3961 | gcry_cipher_setiv(peer_data->cipher, iv, mac_len);
3962 | gcry_cipher_encrypt(peer_data->cipher, poly_key, 32, poly_key, 32);
3963 |
3964 | gcry_mac_hd_t mac_hd;
3965 | gcry_mac_open(&mac_hd, GCRY_MAC_POLY1305, 0, NULL((void*)0));
3966 | gcry_mac_setkey(mac_hd, poly_key, 32);
3967 | gcry_mac_write(mac_hd, ctext, 4);
3968 | gcry_mac_write(mac_hd, ctext2, message_length);
3969 | if (gcry_mac_verify(mac_hd, mac, mac_len)) {
3970 | ws_debug("ssh: MAC does not match")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 3970, __func__, "ssh: MAC does not match"); } } while (0);
3971 | }
3972 | size_t buflen = DIGEST_MAX_SIZE48;
3973 | gcry_mac_read(mac_hd, calc_mac, &buflen);
3974 | gcry_mac_close(mac_hd);
3975 |
3976 | data_len = message_length + 4;
3977 |
3978 | ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
3979 | ssh_print_data("", plain, message_length+4);
3980 | } else if (CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
3981 |
3982 | /* AES GCM for Secure Shell [RFC 5647] */
3983 | /* The message length is Additional Authenticated Data */
3984 | if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
3985 | /* Can do reassembly, and the packet length is split across
3986 | * segment boundaries. */
3987 | pinfo->desegment_offset = offset;
3988 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
3989 | return tvb_captured_length(tvb);
3990 | }
3991 | message_length = tvb_get_uint32(tvb, offset, ENC_BIG_ENDIAN0x00000000);
3992 | ssh_debug_printf("length: %d, remaining: %d\n", message_length, remaining);
3993 | /* The minimum size of a packet (not counting mac) is 16. */
3994 | if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 16) {
3995 | 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" , 3995, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
3996 | return tvb_captured_length(tvb);
3997 | }
3998 |
3999 | /* SSH requires that the data to be encrypted (not including the AAD,
4000 | * so message_length) be a multiple of the block size, 16 octets */
4001 | if (message_length % 16 != 0) {
4002 | ssh_debug_printf("length not a multiple of block length (16)!\n");
4003 | }
4004 |
4005 | if (message_length + 4 + mac_len > remaining) {
4006 | // Need desegmentation; as the message length was unencrypted
4007 | // AAD, we need no special handling here.
4008 | if (pinfo->can_desegment) {
4009 | pinfo->desegment_offset = offset;
4010 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4011 | return tvb_captured_length(tvb);
4012 | }
4013 | // If we can't desegment, we will have an exception below in
4014 | // the tvb_get_ptr. Advance the sequence number (less crucial
4015 | // than with ChaCha20, as it's not an input.)
4016 | peer_data->sequence_number++;
4017 | }
4018 |
4019 | /* Set the IV and increment the invocation_counter for the next
4020 | * packet. Do this before retrieving the ciphertext with tvb_get_ptr
4021 | * in case this packet is truncated.
4022 | */
4023 | if ((err = gcry_cipher_setiv(peer_data->cipher, peer_data->iv, 12))) {
4024 | //gcry_cipher_close(peer_data->cipher);
4025 | //Don't close this unless we also remove the wmem callback
4026 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4027 | #ifndef _WIN32
4028 | 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" , 4028, __func__, "ssh: can't set aes128 cipher iv"); } } while (0);
4029 | 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" , 4029, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource (err), gcry_strerror(err)); } } while (0);
4030 | #endif //ndef _WIN32
4031 | return tvb_captured_length(tvb);
4032 | }
4033 | // Increment invocation_counter for next packet
4034 | int idx = 12;
4035 | do{
4036 | idx -= 1;
4037 | peer_data->iv[idx] += 1;
4038 | }while(idx>4 && peer_data->iv[idx]==0);
4039 |
4040 | const char *ctext = (const char *)tvb_get_ptr(tvb, offset + 4,
4041 | message_length);
4042 | plain = (uint8_t *)wmem_alloc(pinfo->pool, message_length+4);
4043 | phtonu32(plain, message_length);
4044 |
4045 | if ((err = gcry_cipher_authenticate(peer_data->cipher, plain, 4))) {
4046 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4047 | #ifndef _WIN32
4048 | 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" , 4048, __func__, "can't authenticate using aes128-gcm: %s\n" , gpg_strerror(err)); } } while (0);
4049 | #endif //ndef _WIN32
4050 | return tvb_captured_length(tvb);
4051 | }
4052 |
4053 | if ((err = gcry_cipher_decrypt(peer_data->cipher, plain+4, message_length,
4054 | ctext, message_length))) {
4055 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4056 | #ifndef _WIN32
4057 | 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" , 4057, __func__, "can't decrypt aes-gcm %d %s %s", gcry_err_code (err), gcry_strsource(err), gcry_strerror(err)); } } while (0 );
4058 |
4059 | #endif //ndef _WIN32
4060 | return tvb_captured_length(tvb);
4061 | }
4062 |
4063 | if (gcry_cipher_gettag (peer_data->cipher, calc_mac, 16)) {
4064 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4065 | #ifndef _WIN32
4066 | 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" , 4066, __func__, "aes128-gcm, gcry_cipher_gettag() failed\n" ); } } while (0);
4067 | #endif //ndef _WIN32
4068 | return tvb_captured_length(tvb);
4069 | }
4070 |
4071 | if ((err = gcry_cipher_reset(peer_data->cipher)gcry_cipher_ctl ((peer_data->cipher), GCRYCTL_RESET, ((void *)0), 0))) {
4072 | // TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4073 | #ifndef _WIN32
4074 | 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" , 4074, __func__, "aes-gcm, gcry_cipher_reset failed: %s\n", gpg_strerror (err)); } } while (0);
4075 | #endif //ndef _WIN32
4076 | return tvb_captured_length(tvb);
4077 | }
4078 |
4079 | data_len = message_length + 4;
4080 |
4081 | ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
4082 | ssh_print_data("", plain, message_length+4);
4083 |
4084 | } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id ||
4085 | CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id ||
4086 | CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id) {
4087 |
4088 | 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" , 4088, __func__, "Getting raw bytes of length %d", tvb_reported_length_remaining (tvb, offset)); } } while (0);
4089 | /* In CBC and CTR mode, the message length is encrypted as well.
4090 | * We need to decrypt one block, 16 octets, to get the length.
4091 | */
4092 | if (ssh_desegment && pinfo->can_desegment && remaining < 16) {
4093 | /* Can do reassembly, and the packet length is split across
4094 | * segment boundaries. */
4095 | pinfo->desegment_offset = offset;
4096 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4097 | return tvb_captured_length(tvb);
4098 | }
4099 | /* Do we already have the first block decrypted from when the packet
4100 | * was too large and segmented?
4101 | */
4102 | if (!peer_data->plain0_valid) {
4103 | const char *cypher_buf0 = (const char *)tvb_get_ptr(tvb, offset, 16);
4104 |
4105 | if (gcry_cipher_decrypt(peer_data->cipher, peer_data->plain0, 16, cypher_buf0, 16))
4106 | {
4107 | ws_debug("can\'t decrypt aes128")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4107, __func__, "can\'t decrypt aes128"); } } while (0);
4108 | return tvb_captured_length(tvb);
4109 | }
4110 | }
4111 |
4112 | message_length = pntohu32(peer_data->plain0);
4113 |
4114 | /* The message_length value doesn't include the length of the
4115 | * message_length field itself, so it must be at least 12 bytes.
4116 | */
4117 | if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 12){
4118 | 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" , 4118, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
4119 | return tvb_captured_length(tvb);
4120 | }
4121 |
4122 | /* SSH requires that the data to be encrypted (message_length+4)
4123 | * be a multiple of the block size, 16 octets. */
4124 | if (message_length % 16 != 12) {
4125 | ssh_debug_printf("total length not a multiple of block length (16)!\n");
4126 | }
4127 | if (remaining < message_length + 4 + mac_len) {
4128 | /* Need desegmentation
4129 | *
4130 | * We will be handed the full encrypted packet again. We can either
4131 | * store the decrypted first block, or will need to reset the CTR
4132 | * or IV appropriately before decrypting the first block again.
4133 | * libgcrypt does not provide an easy way to get the current value
4134 | * of the CTR or (or IV/last block for CBC), so we just store the
4135 | * decrypted first block.
4136 | */
4137 | if (ssh_desegment && pinfo->can_desegment) {
4138 | 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" , 4139, __func__, " need_desegmentation: offset = %d, reported_length_remaining = %d\n" , offset, tvb_reported_length_remaining(tvb, offset)); } } while (0)
4139 | offset, tvb_reported_length_remaining(tvb, offset))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 4139, __func__, " need_desegmentation: offset = %d, reported_length_remaining = %d\n" , offset, tvb_reported_length_remaining(tvb, offset)); } } while (0);
4140 | peer_data->plain0_valid = true1;
4141 | pinfo->desegment_offset = offset;
4142 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4143 | return tvb_captured_length(tvb);
4144 | } else {
4145 | // If we can't desegment, we will have an exception below in
4146 | // the tvb_get_ptr. Advance the sequence number so that the
4147 | // the hash will work for the next packet.
4148 | //
4149 | // XXX - In CTR mode, we should advance the CTR based on the
4150 | // known length so we can dissect the next block. We would
4151 | // also need to reset the CTR after failing to dissect a
4152 | // packet_length on the continuation data that comes next.
4153 | peer_data->sequence_number++;
4154 | }
4155 | }
4156 | peer_data->plain0_valid = false0;
4157 | plain = (uint8_t *)wmem_alloc(pinfo->pool, message_length+4);
4158 | memcpy(plain, peer_data->plain0, 16);
4159 |
4160 | if (message_length - 12 > 0) {
4161 | /* All of these functions actually do handle the case where
4162 | * there is no data left, so the check is unnecessary.
4163 | */
4164 | char *ct = (char *)tvb_get_ptr(tvb, offset + 16, message_length - 12);
4165 | if ((err = gcry_cipher_decrypt(peer_data->cipher, plain + 16, message_length - 12, ct, message_length - 12)))
4166 | {
4167 | 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" , 4167, __func__, "can't decrypt aes-cbc/ctr %d %s %s", gcry_err_code (err), gcry_strsource(err), gcry_strerror(err)); } } while (0 );
4168 | return tvb_captured_length(tvb);
4169 | }
4170 | }
4171 |
4172 | ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
4173 | ssh_print_data("", plain, message_length+4);
4174 |
4175 | data_len = message_length + 4;
4176 |
4177 | // XXX - In -etm modes, should calculate MAC based on ciphertext.
4178 | ssh_calc_mac(peer_data, seqnr, plain, data_len, calc_mac);
4179 | } else if (CIPHER_NULL0x00080000 == peer_data->cipher_id) {
4180 | if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
4181 | /* Can do reassembly, and the packet length is split across
4182 | * segment boundaries. */
4183 | pinfo->desegment_offset = offset;
4184 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4185 | return tvb_captured_length(tvb);
4186 | }
4187 | message_length = tvb_get_uint32(tvb, offset, ENC_BIG_ENDIAN0x00000000);
4188 | ssh_debug_printf("length: %d, remaining: %d\n", message_length, remaining);
4189 | if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 8) {
4190 | 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" , 4190, __func__, "ssh: unreasonable message length %u", message_length ); } } while (0);
4191 | return tvb_captured_length(tvb);
4192 | }
4193 |
4194 | if (message_length + 4 + mac_len > remaining) {
4195 | // Need desegmentation; as the message length was unencrypted
4196 | // AAD, we need no special handling here.
4197 | if (pinfo->can_desegment) {
4198 | pinfo->desegment_offset = offset;
4199 | pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4200 | return tvb_captured_length(tvb);
4201 | }
4202 | // If we can't desegment, we will have an exception below in
4203 | // the tvb_memdup. Advance the sequence number (not crucial).
4204 | peer_data->sequence_number++;
4205 | }
4206 | data_len = message_length + 4;
4207 | plain = tvb_memdup(pinfo->pool, tvb, offset, data_len);
4208 |
4209 | // XXX - In -etm modes, should calculate MAC based on ciphertext.
4210 | ssh_calc_mac(peer_data, seqnr, plain, data_len, calc_mac);
4211 | }
4212 |
4213 | if (mac_len && data_len) {
4214 | mac = tvb_get_ptr(tvb, offset + data_len, mac_len);
4215 | if (!memcmp(mac, calc_mac, mac_len)){
4216 | ws_noisy("MAC OK")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c" , 4216, __func__, "MAC OK"); } } while (0);
4217 | }else{
4218 | ws_debug("MAC ERR")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c" , 4218, __func__, "MAC ERR"); } } while (0);
4219 | /* Bad MAC, just show the packet as encrypted. We can get
4220 | * this for a known encryption type with no keys currently. */
4221 | if (!ssh_ignore_mac_failed) {
4222 | return tvb_captured_length(tvb);
4223 | }
4224 | }
4225 | }
4226 |
4227 | if(plain){
4228 | // Save message
4229 |
4230 | ssh_packet_info_t *packet = ssh_get_packet_info(pinfo, is_response);
4231 |
4232 | int record_id = tvb_raw_offset(tvb)+offset;
4233 | ssh_message_info_t *message;
4234 |
4235 | message = wmem_new(wmem_file_scope(), ssh_message_info_t)((ssh_message_info_t*)wmem_alloc((wmem_file_scope()), sizeof( ssh_message_info_t)));
4236 | message->sequence_number = peer_data->sequence_number++;
4237 | message->plain_data = wmem_memdup(wmem_file_scope(), plain, data_len);
4238 | message->data_len = data_len;
4239 | message->id = record_id;
4240 | message->next = NULL((void*)0);
4241 | memcpy(message->calc_mac, calc_mac, DIGEST_MAX_SIZE48);
4242 | ssh_debug_printf("%s->sequence_number++ > %d\n", is_response?"server":"client", peer_data->sequence_number);
4243 |
4244 | ssh_message_info_t **pmessage = &packet->messages;
4245 | while(*pmessage){
4246 | pmessage = &(*pmessage)->next;
4247 | }
4248 | *pmessage = message;
4249 | }
4250 |
4251 | offset += message_length + mac_len + 4;
4252 | return offset;
4253 | }
4254 |
4255 | static bool_Bool
4256 | ssh_decrypt_chacha20(gcry_cipher_hd_t hd,
4257 | uint32_t seqnr, uint32_t counter, const unsigned char *ctext, unsigned ctext_len,
4258 | unsigned char *plain, unsigned plain_len)
4259 | {
4260 | unsigned char seq[8];
4261 | unsigned char iv[16];
4262 |
4263 | phtonu64(seq, (uint64_t)seqnr);
4264 |
4265 | // chacha20 uses a different cipher handle for the packet payload & length
4266 | // the payload uses a block counter
4267 | if (counter) {
4268 | unsigned char ctr[8] = {1,0,0,0,0,0,0,0};
4269 | memcpy(iv, ctr, 8);
4270 | memcpy(iv+8, seq, 8);
4271 | }
4272 |
4273 | return ((!counter && gcry_cipher_setiv(hd, seq, 8) == 0) ||
4274 | (counter && gcry_cipher_setiv(hd, iv, 16) == 0)) &&
4275 | gcry_cipher_decrypt(hd, plain, plain_len, ctext, ctext_len) == 0;
4276 | }
4277 |
4278 | static int
4279 | ssh_dissect_decrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
4280 | struct ssh_peer_data *peer_data, proto_tree *tree,
4281 | ssh_message_info_t *message)
4282 | {
4283 | int offset = 0; // TODO:
4284 | int dissected_len = 0;
4285 | tvbuff_t* payload_tvb;
4286 |
4287 | const uint8_t* plaintext = message->plain_data;
4288 | unsigned plaintext_len = message->data_len;
4289 |
4290 | col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Encrypted packet (plaintext_len=%d)", plaintext_len);
4291 |
4292 | tvbuff_t *packet_tvb = tvb_new_child_real_data(tvb, plaintext, plaintext_len, plaintext_len);
4293 | add_new_data_source(pinfo, packet_tvb, "Decrypted Packet");
4294 |
4295 | unsigned plen;
4296 | uint32_t padding_length;
4297 | unsigned remain_length;
4298 | unsigned msg_code;
4299 |
4300 | proto_item *ti, *padding_ti;
4301 | proto_item *msg_type_tree = NULL((void*)0);
4302 |
4303 | /*
4304 | * We use "tvb_ensure_captured_length_remaining()" to make sure there
4305 | * actually *is* data remaining.
4306 | *
4307 | * This means we're guaranteed that "remain_length" is positive.
4308 | */
4309 | remain_length = tvb_ensure_captured_length_remaining(packet_tvb, offset);
4310 | /*
4311 | * Can we do reassembly?
4312 | */
4313 | if (ssh_desegment && pinfo->can_desegment) {
4314 | /*
4315 | * Yes - would an SSH header starting at this offset
4316 | * be split across segment boundaries?
4317 | */
4318 | if (remain_length < 4) {
4319 | /*
4320 | * Yes. Tell the TCP dissector where the data for
4321 | * this message starts in the data it handed us and
4322 | * that we need "some more data." Don't tell it
4323 | * exactly how many bytes we need because if/when we
4324 | * ask for even more (after the header) that will
4325 | * break reassembly.
4326 | */
4327 | pinfo->desegment_offset = offset;
4328 | pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4329 | return offset;
4330 | }
4331 | }
4332 | /* XXX - Defragmentation needs to be done in ssh_decrypt_packet, and the
4333 | * checks there should mean that the above never has an effect. (It's
4334 | * copied from ssh_dissect_key_exchange.)
4335 | */
4336 | plen = tvb_get_ntohl(packet_tvb, offset);
4337 |
4338 | if (ssh_desegment && pinfo->can_desegment) {
4339 | if (plen + 4 > remain_length) {
4340 | pinfo->desegment_offset = offset;
4341 | pinfo->desegment_len = plen+4 - remain_length;
4342 | return offset;
4343 | }
4344 | }
4345 | /*
4346 | * Need to check plen > 0x80000000 here
4347 | */
4348 |
4349 | ti = proto_tree_add_uint(tree, hf_ssh_packet_length, packet_tvb,
4350 | offset, 4, plen);
4351 | if (plen < 8) {
4352 | /* RFC 4253 6: "[T]he length of the concatenation of 'packet_length',
4353 | * 'padding_length', 'payload', and 'random padding' MUST be a multiple
4354 | * of the cipher block size or 8, whichever is larger,... even when
4355 | * using stream ciphers."
4356 | *
4357 | * Modes that do not encrypt plen with the same key as the other three
4358 | * cannot follow this as written and delete 'packet_length' from the
4359 | * above sentence. As padding_length is one byte and random_padding at
4360 | * least four, packet_length must be at least 8 in all modes.
4361 | */
4362 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Packet length is %d, MUST be at least 8", plen);
4363 | } else if (plen >= SSH_MAX_PACKET_LEN32768) {
4364 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Overly large number %d", plen);
4365 | plen = remain_length-4;
4366 | }
4367 | offset+=4;
4368 |
4369 | /* padding length */
4370 | padding_ti = proto_tree_add_item_ret_uint(tree, hf_ssh_padding_length, packet_tvb, offset, 1, ENC_NA0x00000000, &padding_length);
4371 | /* RFC 4253 6: "There MUST be at least four bytes of padding." */
4372 | if (padding_length < 4) {
4373 | expert_add_info_format(pinfo, padding_ti, &ei_ssh_padding_length, "Padding length is %d, MUST be at least 4", padding_length);
4374 | }
4375 | unsigned payload_length;
4376 | if (ckd_sub(&payload_length, plen, padding_length + 1)__builtin_sub_overflow((plen), (padding_length + 1), (&payload_length ))) {
4377 | expert_add_info_format(pinfo, padding_ti, &ei_ssh_padding_length, "Padding length is too large [%d], implies a negative payload length", padding_length);
4378 | payload_length = 0;
4379 | }
4380 | offset += 1;
4381 |
4382 | /* msg_code */
4383 | msg_code = tvb_get_uint8(packet_tvb, offset);
4384 | /* XXX - Payload compression could have been negotiated */
4385 | payload_tvb = tvb_new_subset_length(packet_tvb, offset, (int)payload_length);
4386 | bool_Bool is_response = ssh_peer_data_from_server(peer_data);
4387 |
4388 | /* Transport layer protocol */
4389 | /* Generic (1-19) */
4390 | if(msg_code >= 1 && msg_code <= 19) {
4391 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4392 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Transport (generic)");
4393 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4394 | dissected_len = ssh_dissect_transport_generic(payload_tvb, pinfo, 1, peer_data, msg_type_tree, msg_code);
4395 | }
4396 | /* Algorithm negotiation (20-29) */
4397 | /* Normally these messages are all dissected in ssh_dissect_key_exchange */
4398 | else if(msg_code >=20 && msg_code <= 29) {
4399 | //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);
4400 |
4401 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4402 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Transport (algorithm negotiation)");
4403 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4404 | dissected_len = 1;
4405 |
4406 | 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" , 4406, __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);
4407 | switch(msg_code)
4408 | {
4409 | case SSH_MSG_KEXINIT20:
4410 | {
4411 | 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" , 4411, __func__, "ssh: REKEY msg_code 20: storing frame %u number, offset %d" , pinfo->num, offset); } } while (0);
4412 | peer_data->rekey_trigger_frame = pinfo->num;
4413 | // Reset array while REKEY: sanitize server_key_exchange_init and force do_decrypt :
4414 | peer_data->global_data->kex_server_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
4415 | peer_data->global_data->do_decrypt = true1;
4416 | dissected_len = ssh_dissect_key_init(payload_tvb, pinfo, offset - 4, msg_type_tree, is_response, peer_data->global_data);
4417 | break;
4418 | }
4419 | case SSH_MSG_NEWKEYS21:
4420 | {
4421 | if (peer_data->rekey_pending) {
4422 | 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" , 4422, __func__, "ssh: REKEY pending... NEWKEYS frame %u", pinfo ->num); } } while (0);
4423 | 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" , 4423, __func__, "ssh: decrypting frame %u with key ID %u, seq=%u" , pinfo->num, peer_data->cipher_id, peer_data->sequence_number ); } } while (0);
4424 | if (peer_data->global_data->ext_kex_strict) {
4425 | peer_data->sequence_number = 0;
4426 | ssh_debug_printf("%s->sequence_number reset to 0 (Strict KEX)\n", is_response ? "server" : "client");
4427 | 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" , 4427, __func__, "ssh: REKEY reset %s sequence number to 0 at frame %u (Strict KEX)" , is_response ? "server" : "client", pinfo->num); } } while (0);
4428 | }
4429 | // finalize the rekey (activate the new keys)
4430 | if (!is_response) { // Only process client-sent NEWKEYS
4431 | // Activate new key material into peer_data->cipher
4432 | ssh_debug_printf("Activating new keys for CLIENT => SERVER\n");
4433 | ssh_decryption_setup_cipher(peer_data, &peer_data->global_data->new_keys[0], &peer_data->global_data->new_keys[2]);
4434 | ssh_decryption_setup_mac(peer_data, &peer_data->global_data->new_keys[4]);
4435 | } else { // Only process server-sent NEWKEYS
4436 | // Activate new key material into peer_data->cipher
4437 | ssh_debug_printf("Activating new keys for SERVER => CLIENT\n");
4438 | ssh_decryption_setup_cipher(peer_data, &peer_data->global_data->new_keys[1], &peer_data->global_data->new_keys[3]);
4439 | ssh_decryption_setup_mac(peer_data, &peer_data->global_data->new_keys[5]);
4440 | }
4441 | // Finishing REKEY
4442 | peer_data->rekey_pending = false0;
4443 | 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" , 4443, __func__, "ssh: REKEY done... switched to NEWKEYS at frame %u" , pinfo->num); } } while (0);
4444 | }
4445 | break;
4446 | }
4447 | }
4448 | }
4449 | /* Key exchange method specific (reusable) (30-49) */
4450 | /* Normally these messages are all dissected in ssh_dissect_key_exchange */
4451 | else if (msg_code >=30 && msg_code <= 49) {
4452 | //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);
4453 |
4454 | 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)");
4455 | 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" , 4455, __func__, "ssh: rekey KEX_xxx_INIT/KEX_xxx_REPLY detected in frame %u" , pinfo->num); } } while (0);
4456 | peer_data->rekey_pending = true1;
4457 | dissected_len = peer_data->global_data->kex_specific_dissector(msg_code, payload_tvb, pinfo, offset -5, msg_type_tree, peer_data->global_data);
4458 | }
4459 |
4460 | /* User authentication protocol */
4461 | /* Generic (50-59) */
4462 | else if (msg_code >= 50 && msg_code <= 59) {
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: User Authentication (generic)");
4465 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4466 | dissected_len = ssh_dissect_userauth_generic(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4467 | }
4468 | /* User authentication method specific (reusable) (60-79) */
4469 | else if (msg_code >= 60 && msg_code <= 79) {
4470 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4471 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: User Authentication: (method specific)");
4472 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4473 | dissected_len = ssh_dissect_userauth_specific(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4474 | }
4475 |
4476 | /* Connection protocol */
4477 | /* Generic (80-89) */
4478 | else if (msg_code >= 80 && msg_code <= 89) {
4479 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4480 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Connection (generic)");
4481 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4482 | dissected_len = ssh_dissect_connection_generic(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4483 | }
4484 | /* Channel related messages (90-127) */
4485 | else if (msg_code >= 90 && msg_code <= 127) {
4486 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4487 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Connection: (channel related message)");
4488 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4489 | dissected_len = ssh_dissect_connection_specific(payload_tvb, pinfo, peer_data, 1, msg_type_tree, msg_code, message);
4490 | }
4491 |
4492 | /* Reserved for client protocols (128-191) */
4493 | else if (msg_code >= 128 && msg_code <= 191) {
4494 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4495 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Client protocol");
4496 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4497 | offset+=1;
4498 | // TODO: dissected_len = ssh_dissect_client(payload_tvb, pinfo, global_data, 1, msg_type_tree, is_response, msg_code);
4499 | }
4500 |
4501 | /* Local extensions (192-255) */
4502 | else if (msg_code >= 192 && msg_code <= 255) {
4503 | msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Local extension");
4504 | dissected_len = ssh_dissect_local_extension(payload_tvb, pinfo, 0, peer_data, msg_type_tree, msg_code);
4505 | }
4506 |
4507 | /* XXX - ssh_dissect_key_exchange only adds undecoded payload here,
4508 | * i.e., tvb_reported_length_remaining(payload_tvb, dissected_len)
4509 | */
4510 | if (payload_length > 0) {
4511 | proto_tree_add_item(msg_type_tree, hf_ssh_payload, packet_tvb, offset, payload_length, ENC_NA0x00000000);
4512 | }
4513 | if(dissected_len!=(int)payload_length){
4514 | 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);
4515 | }
4516 | offset += payload_length;
4517 |
4518 | /* padding */
4519 | proto_tree_add_item(tree, hf_ssh_padding_string, packet_tvb, offset, padding_length, ENC_NA0x00000000);
4520 | offset += padding_length;
4521 |
4522 | if (peer_data->mac_length > 0) {
4523 | 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);
4524 | offset += peer_data->mac_length;
4525 | }
4526 | ti = proto_tree_add_uint(tree, hf_ssh_seq_num, tvb, offset, 0, message->sequence_number);
4527 | proto_item_set_generated(ti);
4528 | return offset;
4529 | }
4530 |
4531 | static int
4532 | ssh_dissect_transport_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
4533 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code)
4534 | {
4535 | (void)pinfo;
4536 | if(msg_code==SSH_MSG_DISCONNECT1){
4537 | proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_reason, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4538 | offset += 4;
4539 | unsigned nlen;
4540 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4541 | proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_description_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4542 | offset += 4;
4543 | proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_description, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4544 | offset += nlen;
4545 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4546 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4547 | offset += 4;
4548 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4549 | offset += nlen;
4550 | }else if(msg_code==SSH_MSG_IGNORE2){
4551 | offset += ssh_tree_add_string(packet_tvb, offset, msg_type_tree, hf_ssh_ignore_data, hf_ssh_ignore_data_length);
4552 | }else if(msg_code==SSH_MSG_DEBUG4){
4553 | unsigned slen;
4554 | proto_tree_add_item(msg_type_tree, hf_ssh_debug_always_display, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4555 | offset += 1;
4556 | slen = tvb_get_ntohl(packet_tvb, offset) ;
4557 | proto_tree_add_item(msg_type_tree, hf_ssh_debug_message_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4558 | offset += 4;
4559 | proto_tree_add_item(msg_type_tree, hf_ssh_debug_message, packet_tvb, offset, slen, ENC_UTF_80x00000002);
4560 | offset += slen;
4561 | slen = tvb_get_ntohl(packet_tvb, offset) ;
4562 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4563 | offset += 4;
4564 | proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4565 | offset += slen;
4566 | }else if(msg_code==SSH_MSG_SERVICE_REQUEST5){
4567 | unsigned nlen;
4568 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4569 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4570 | offset += 4;
4571 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4572 | offset += nlen;
4573 | }else if(msg_code==SSH_MSG_SERVICE_ACCEPT6){
4574 | unsigned nlen;
4575 | nlen = tvb_get_ntohl(packet_tvb, offset) ;
4576 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4577 | offset += 4;
4578 | proto_tree_add_item(msg_type_tree, hf_ssh_service_name, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4579 | offset += nlen;
4580 | }else if(msg_code==SSH_MSG_EXT_INFO7){
4581 | unsigned ext_cnt;
4582 | ext_cnt = tvb_get_ntohl(packet_tvb, offset);
4583 | proto_tree_add_item(msg_type_tree, hf_ssh_ext_count, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4584 | offset += 4;
4585 | for(unsigned ext_index = 0; ext_index < ext_cnt; ext_index++) {
4586 | offset = ssh_dissect_rfc8308_extension(packet_tvb, pinfo, offset, peer_data, msg_type_tree);
4587 | }
4588 | }
4589 | return offset;
4590 | }
4591 |
4592 | static int
4593 | ssh_dissect_rfc8308_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
4594 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree)
4595 | {
4596 | (void)pinfo;
4597 | unsigned ext_name_slen = tvb_get_ntohl(packet_tvb, offset);
4598 | uint8_t *ext_name = tvb_get_string_enc(pinfo->pool, packet_tvb, offset + 4, ext_name_slen, ENC_ASCII0x00000000);
4599 | unsigned ext_value_slen = tvb_get_ntohl(packet_tvb, offset + 4 + ext_name_slen);
4600 | unsigned ext_len = 8 + ext_name_slen + ext_value_slen;
4601 | 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);
4602 |
4603 | proto_tree_add_item(ext_tree, hf_ssh_ext_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4604 | offset += 4;
4605 | proto_tree_add_item(ext_tree, hf_ssh_ext_name, packet_tvb, offset, ext_name_slen, ENC_ASCII0x00000000);
4606 | offset += ext_name_slen;
4607 | proto_tree_add_item(ext_tree, hf_ssh_ext_value_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4608 | offset += 4;
4609 | proto_tree_add_item(ext_tree, hf_ssh_ext_value, packet_tvb, offset, ext_value_slen, ENC_NA0x00000000);
4610 |
4611 | if (g_str_equal(ext_name, "server-sig-algs")(strcmp ((const char *) (ext_name), (const char *) ("server-sig-algs" )) == 0)) {
4612 | // server-sig-algs (RFC8308 Sec. 3.1)
4613 | proto_tree_add_item(ext_tree, hf_ssh_ext_server_sig_algs_algorithms, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4614 | offset += ext_value_slen;
4615 | } else if (g_str_equal(ext_name, "delay-compression")(strcmp ((const char *) (ext_name), (const char *) ("delay-compression" )) == 0)) {
4616 | // delay-compression (RFC8308 Sec 3.2)
4617 | unsigned slen;
4618 | slen = tvb_get_ntohl(packet_tvb, offset);
4619 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_client_to_server_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4620 | offset += 4;
4621 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_client_to_server, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4622 | offset += slen;
4623 | slen = tvb_get_ntohl(packet_tvb, offset);
4624 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_server_to_client_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4625 | offset += 4;
4626 | proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_server_to_client, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4627 | offset += slen;
4628 | } else if (g_str_equal(ext_name, "no-flow-control")(strcmp ((const char *) (ext_name), (const char *) ("no-flow-control" )) == 0)) {
4629 | // no-flow-control (RFC 8308 Sec 3.3)
4630 | proto_tree_add_item(ext_tree, hf_ssh_ext_no_flow_control_value, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4631 | offset += ext_value_slen;
4632 | } else if (g_str_equal(ext_name, "elevation")(strcmp ((const char *) (ext_name), (const char *) ("elevation" )) == 0)) {
4633 | // elevation (RFC 8308 Sec 3.4)
4634 | proto_tree_add_item(ext_tree, hf_ssh_ext_elevation_value, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4635 | offset += ext_value_slen;
4636 | } else if (g_str_equal(ext_name, "publickey-algorithms@roumenpetrov.info")(strcmp ((const char *) (ext_name), (const char *) ("publickey-algorithms@roumenpetrov.info" )) == 0)) {
4637 | // publickey-algorithms@roumenpetrov.info (proprietary)
4638 | proto_tree_add_item(ext_tree, hf_ssh_ext_prop_publickey_algorithms_algorithms, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4639 | offset += ext_value_slen;
4640 | } else if (g_str_equal(ext_name, "ping@openssh.com")(strcmp ((const char *) (ext_name), (const char *) ("ping@openssh.com" )) == 0)) {
4641 | // ping@openssh.com (proprietary w/ primitive extension value)
4642 | peer_data->global_data->ext_ping_openssh_offered = true1;
4643 | offset += ext_value_slen;
4644 | } else {
4645 | offset += ext_value_slen;
4646 | }
4647 |
4648 | // The following extensions do not require advanced dissection:
4649 | // - global-requests-ok
4650 | // - ext-auth-info
4651 | // - publickey-hostbound@openssh.com
4652 | // - ext-info-in-auth@openssh.com
4653 |
4654 | return offset;
4655 | }
4656 |
4657 | static int
4658 | ssh_dissect_userauth_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
4659 | int offset, proto_item *msg_type_tree, unsigned msg_code)
4660 | {
4661 | if(msg_code==SSH_MSG_USERAUTH_REQUEST50){
4662 | uint32_t slen;
4663 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_user_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4664 | offset += 4;
4665 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_user_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4666 | offset += slen;
4667 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4668 | offset += 4;
4669 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_service_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4670 | offset += slen;
4671 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_method_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4672 | offset += 4;
4673 | const char* key_type;
4674 | 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);
4675 | offset += slen;
4676 | if (0 == strcmp(key_type, "none")) {
4677 | }else if (0 == strcmp(key_type, "publickey") || 0 == strcmp(key_type, "publickey-hostbound-v00@openssh.com")) {
4678 | uint8_t bHaveSignature = tvb_get_uint8(packet_tvb, offset);
4679 | int dissected_len = 0;
4680 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_have_signature, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4681 | offset += 1;
4682 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_pka_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4683 | offset += 4;
4684 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4685 | offset += slen;
4686 | proto_item *ti;
4687 | ti = proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_blob_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4688 | offset += 4;
4689 | dissected_len = ssh_dissect_public_key_blob(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
4690 | if(dissected_len!=(int)slen){
4691 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4692 | }
4693 | offset += slen;
4694 | if (0 == strcmp(key_type, "publickey-hostbound-v00@openssh.com")) {
4695 | // Host key - but should we add it to global data or not?
4696 | offset += ssh_tree_add_hostkey(packet_tvb, pinfo, offset, msg_type_tree, "Server host key",
4697 | ett_key_exchange_host_key, NULL((void*)0));
4698 | }
4699 | if(bHaveSignature){
4700 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_signature_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4701 | offset += 4;
4702 | proto_item *signature_tree = NULL((void*)0);
4703 | signature_tree = proto_tree_add_subtree(msg_type_tree, packet_tvb, offset, slen, ett_userauth_pk_signature, NULL((void*)0), "Public key signature");
4704 | dissected_len = ssh_dissect_public_key_signature(packet_tvb, pinfo, offset, signature_tree) - offset;
4705 | if(dissected_len!=(int)slen){
4706 | expert_add_info_format(pinfo, signature_tree, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4707 | }
4708 | offset += slen;
4709 | }
4710 | }else if (0 == strcmp(key_type, "password")) {
4711 | uint8_t bChangePassword = tvb_get_uint8(packet_tvb, offset);
4712 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_change_password, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4713 | offset += 1;
4714 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_password_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4715 | offset += 4;
4716 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_password, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4717 | offset += slen;
4718 | if(bChangePassword){
4719 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_new_password_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4720 | offset += 4;
4721 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_new_password, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4722 | offset += slen;
4723 | }
4724 | }else{
4725 | }
4726 |
4727 | }else if(msg_code==SSH_MSG_USERAUTH_FAILURE51){
4728 | unsigned slen;
4729 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_auth_failure_list_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4730 | offset += 4;
4731 | proto_tree_add_item(msg_type_tree, hf_ssh_auth_failure_list, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4732 | offset += slen;
4733 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_partial_success, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4734 | offset += 1;
4735 | }
4736 | return offset;
4737 | }
4738 |
4739 | static int
4740 | ssh_dissect_userauth_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
4741 | int offset, proto_item *msg_type_tree, unsigned msg_code)
4742 | {
4743 | if(msg_code==SSH_MSG_USERAUTH_PK_OK60){
4744 | proto_item *ti;
4745 | int dissected_len = 0;
4746 | unsigned slen;
4747 | slen = tvb_get_ntohl(packet_tvb, offset) ;
4748 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4749 | offset += 4;
4750 | proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4751 | offset += slen;
4752 | ti = proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_blob_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4753 | offset += 4;
4754 | dissected_len = ssh_dissect_public_key_blob(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
4755 | if(dissected_len!=(int)slen){
4756 | expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4757 | }
4758 | offset += slen;
4759 | }
4760 | return offset;
4761 | }
4762 |
4763 | static void
4764 | ssh_process_payload(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, ssh_channel_info_t *channel)
4765 | {
4766 | tvbuff_t *next_tvb = tvb_new_subset_remaining(tvb, offset);
4767 | if (channel->handle) {
4768 | call_dissector(channel->handle, next_tvb, pinfo, proto_tree_get_root(tree));
4769 | } else {
4770 | call_data_dissector(next_tvb, pinfo, proto_tree_get_root(tree));
4771 | }
4772 | }
4773 |
4774 | static void
4775 | print_ssh_fragment_tree(fragment_head *ipfd_head, proto_tree *tree, proto_tree *ssh_tree, packet_info *pinfo, tvbuff_t *next_tvb)
4776 | {
4777 | proto_item *ssh_tree_item, *frag_tree_item;
4778 |
4779 | /*
4780 | * The subdissector thought it was completely
4781 | * desegmented (although the stuff at the
4782 | * end may, in turn, require desegmentation),
4783 | * so we show a tree with all segments.
4784 | */
4785 | show_fragment_tree(ipfd_head, &ssh_segment_items,
4786 | tree, pinfo, next_tvb, &frag_tree_item);
4787 | /*
4788 | * The toplevel fragment subtree is now
4789 | * behind all desegmented data; move it
4790 | * right behind the SSH tree.
4791 | */
4792 | ssh_tree_item = proto_tree_get_parent(ssh_tree);
4793 | /* The SSH protocol item is up a few levels from the message tree */
4794 | ssh_tree_item = proto_item_get_parent_nth(ssh_tree_item, 2);
4795 | if (frag_tree_item && ssh_tree_item) {
4796 | proto_tree_move_item(tree, ssh_tree_item, frag_tree_item);
4797 | }
4798 | }
4799 |
4800 | static uint32_t
4801 | ssh_msp_fragment_id(struct tcp_multisegment_pdu *msp)
4802 | {
4803 | /*
4804 | * If a frame contains multiple PDUs, then "first_frame" is not
4805 | * sufficient to uniquely identify groups of fragments. Therefore we use
4806 | * the tcp reassembly functions that also test msp->seq (the position of
4807 | * the initial fragment in the SSH channel).
4808 | */
4809 | return msp->first_frame;
4810 | }
4811 |
4812 | static void
4813 | ssh_proto_tree_add_segment_data(
4814 | proto_tree *tree,
4815 | tvbuff_t *tvb,
4816 | int offset,
4817 | int length,
4818 | const char *prefix)
4819 | {
4820 | proto_tree_add_bytes_format(
4821 | tree,
4822 | hf_ssh_segment_data,
4823 | tvb,
4824 | offset,
4825 | length,
4826 | NULL((void*)0),
4827 | "%sSSH segment data (%u %s)",
4828 | prefix != NULL((void*)0) ? prefix : "",
4829 | length == -1 ? tvb_reported_length_remaining(tvb, offset) : length,
4830 | plurality(length, "byte", "bytes")((length) == 1 ? ("byte") : ("bytes")));
4831 | }
4832 |
4833 | static void
4834 | desegment_ssh(tvbuff_t *tvb, packet_info *pinfo, uint32_t seq,
4835 | uint32_t nxtseq, proto_tree *tree, ssh_channel_info_t *channel)
4836 | {
4837 | fragment_head *ipfd_head;
4838 | bool_Bool must_desegment;
4839 | bool_Bool called_dissector;
4840 | int another_pdu_follows;
4841 | bool_Bool another_segment_in_frame = false0;
4842 | int deseg_offset, offset = 0;
4843 | uint32_t deseg_seq;
4844 | int nbytes;
4845 | proto_item *item;
4846 | struct tcp_multisegment_pdu *msp;
4847 | bool_Bool first_pdu = true1;
4848 |
4849 | again:
4850 | ipfd_head = NULL((void*)0);
4851 | must_desegment = false0;
4852 | called_dissector = false0;
4853 | another_pdu_follows = 0;
4854 | msp = NULL((void*)0);
4855 |
4856 | /*
4857 | * Initialize these to assume no desegmentation.
4858 | * If that's not the case, these will be set appropriately
4859 | * by the subdissector.
4860 | */
4861 | pinfo->desegment_offset = 0;
4862 | pinfo->desegment_len = 0;
4863 |
4864 | /*
4865 | * Initialize this to assume that this segment will just be
4866 | * added to the middle of a desegmented chunk of data, so
4867 | * that we should show it all as data.
4868 | * If that's not the case, it will be set appropriately.
4869 | */
4870 | deseg_offset = offset;
4871 |
4872 | /* If we've seen this segment before (e.g., it's a retransmission),
4873 | * there's nothing for us to do. Certainly, don't add it to the list
4874 | * of multisegment_pdus (that would cause subsequent lookups to find
4875 | * the retransmission instead of the original transmission, breaking
4876 | * dissection of the desegmented pdu if we'd already seen the end of
4877 | * the pdu).
4878 | */
4879 | if ((msp = (struct tcp_multisegment_pdu *)wmem_tree_lookup32(channel->multisegment_pdus, seq))) {
4880 | const char *prefix;
4881 | bool_Bool is_retransmission = false0;
4882 |
4883 | if (msp->first_frame == pinfo->num) {
4884 | /* This must be after the first pass. */
4885 | prefix = "";
4886 | if (msp->last_frame == pinfo->num) {
4887 | col_clear(pinfo->cinfo, COL_INFO);
4888 | } else {
4889 | if (first_pdu) {
4890 | col_append_sep_str(pinfo->cinfo, COL_INFO, " ", "[SSH segment of a reassembled PDU]");
4891 | }
4892 | }
4893 | } else {
4894 | prefix = "Retransmitted ";
4895 | is_retransmission = true1;
4896 | }
4897 |
4898 | if (!is_retransmission) {
4899 | ipfd_head = fragment_get(&ssh_reassembly_table, pinfo, msp->first_frame, msp);
4900 | if (ipfd_head != NULL((void*)0) && ipfd_head->reassembled_in !=0 &&
4901 | ipfd_head->reassembled_in != pinfo->num) {
4902 | /* Show what frame this was reassembled in if not this one. */
4903 | item=proto_tree_add_uint(tree, *ssh_segment_items.hf_reassembled_in,
4904 | tvb, 0, 0, ipfd_head->reassembled_in);
4905 | proto_item_set_generated(item);
4906 | }
4907 | }
4908 | nbytes = tvb_reported_length_remaining(tvb, offset);
4909 | ssh_proto_tree_add_segment_data(tree, tvb, offset, nbytes, prefix);
4910 | return;
4911 | }
4912 |
4913 | /* Else, find the most previous PDU starting before this sequence number */
4914 | msp = (struct tcp_multisegment_pdu *)wmem_tree_lookup32_le(channel->multisegment_pdus, seq-1);
4915 | if (msp && msp->seq <= seq && msp->nxtpdu > seq) {
4916 | int len;
4917 |
4918 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
4919 | msp->last_frame = pinfo->num;
4920 | msp->last_frame_time = pinfo->abs_ts;
4921 | }
4922 |
4923 | /* OK, this PDU was found, which means the segment continues
4924 | * a higher-level PDU and that we must desegment it.
4925 | */
4926 | if (msp->flags & MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001) {
4927 | /* The dissector asked for the entire segment */
4928 | len = MAX(0, tvb_reported_length_remaining(tvb, offset))(((0) > (tvb_reported_length_remaining(tvb, offset))) ? (0 ) : (tvb_reported_length_remaining(tvb, offset)));
4929 | } else {
4930 | len = MIN(nxtseq, msp->nxtpdu)(((nxtseq) < (msp->nxtpdu)) ? (nxtseq) : (msp->nxtpdu )) - seq;
4931 | }
4932 |
4933 | ipfd_head = fragment_add(&ssh_reassembly_table, tvb, offset,
4934 | pinfo, ssh_msp_fragment_id(msp), msp,
4935 | seq - msp->seq,
4936 | len, (LT_SEQ (nxtseq,msp->nxtpdu)((int32_t)((nxtseq) - (msp->nxtpdu)) < 0)));
4937 |
4938 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)
4939 | && msp->flags & MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001) {
4940 | msp->flags &= (~MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001);
4941 |
4942 | /* If we consumed the entire segment there is no
4943 | * other pdu starting anywhere inside this segment.
4944 | * So update nxtpdu to point at least to the start
4945 | * of the next segment.
4946 | * (If the subdissector asks for even more data we
4947 | * will advance nxtpdu even further later down in
4948 | * the code.)
4949 | */
4950 | msp->nxtpdu = nxtseq;
4951 | }
4952 |
4953 | if ( (msp->nxtpdu < nxtseq)
4954 | && (msp->nxtpdu >= seq)
4955 | && (len > 0)) {
4956 | another_pdu_follows = msp->nxtpdu - seq;
4957 | }
4958 | } else {
4959 | /* This segment was not found in our table, so it doesn't
4960 | * contain a continuation of a higher-level PDU.
4961 | * Call the normal subdissector.
4962 | */
4963 | ssh_process_payload(tvb, offset, pinfo, tree, channel);
4964 | called_dissector = true1;
4965 |
4966 | /* Did the subdissector ask us to desegment some more data
4967 | * before it could handle the packet?
4968 | * If so we have to create some structures in our table but
4969 | * this is something we only do the first time we see this
4970 | * packet.
4971 | */
4972 | if (pinfo->desegment_len) {
4973 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))
4974 | must_desegment = true1;
4975 |
4976 | /*
4977 | * Set "deseg_offset" to the offset in "tvb"
4978 | * of the first byte of data that the
4979 | * subdissector didn't process.
4980 | */
4981 | deseg_offset = offset + pinfo->desegment_offset;
4982 | }
4983 |
4984 | /* Either no desegmentation is necessary, or this is
4985 | * segment contains the beginning but not the end of
4986 | * a higher-level PDU and thus isn't completely
4987 | * desegmented.
4988 | */
4989 | ipfd_head = NULL((void*)0);
4990 | }
4991 |
4992 | /* is it completely desegmented? */
4993 | if (ipfd_head && ipfd_head->reassembled_in == pinfo->num) {
4994 | /*
4995 | * Yes, we think it is.
4996 | * We only call subdissector for the last segment.
4997 | * Note that the last segment may include more than what
4998 | * we needed.
4999 | */
5000 | if (nxtseq < msp->nxtpdu) {
5001 | /*
5002 | * This is *not* the last segment. It is part of a PDU in the same
5003 | * frame, so no another PDU can follow this one.
5004 | * Do not reassemble SSH yet, it will be done in the final segment.
5005 | * (If we are reassembling at FIN, we will do that in dissect_ssl()
5006 | * after iterating through all the records.)
5007 | * Clear the Info column and avoid displaying [SSH segment of a
5008 | * reassembled PDU], the payload dissector will typically set it.
5009 | * (This is needed here for the second pass.)
5010 | */
5011 | another_pdu_follows = 0;
5012 | col_clear(pinfo->cinfo, COL_INFO);
5013 | another_segment_in_frame = true1;
5014 | } else {
5015 | /*
5016 | * OK, this is the last segment of the PDU and also the
5017 | * last segment in this frame.
5018 | * Let's call the subdissector with the desegmented
5019 | * data.
5020 | */
5021 | tvbuff_t *next_tvb;
5022 | int old_len;
5023 |
5024 | /*
5025 | * Reset column in case multiple SSH segments form the PDU
5026 | * and this last SSH segment is not in the first TCP segment of
5027 | * this frame.
5028 | * XXX prevent clearing the column if the last layer is not SSH?
5029 | */
5030 | /* Clear column during the first pass. */
5031 | col_clear(pinfo->cinfo, COL_INFO);
5032 |
5033 | /* create a new TVB structure for desegmented data */
5034 | next_tvb = tvb_new_chain(tvb, ipfd_head->tvb_data);
5035 |
5036 | /* add desegmented data to the data source list */
5037 | add_new_data_source(pinfo, next_tvb, "Reassembled SSH");
5038 |
5039 | /* call subdissector */
5040 | ssh_process_payload(next_tvb, 0, pinfo, tree, channel);
5041 | called_dissector = true1;
5042 |
5043 | /*
5044 | * OK, did the subdissector think it was completely
5045 | * desegmented, or does it think we need even more
5046 | * data?
5047 | */
5048 | old_len = (int)(tvb_reported_length(next_tvb) - tvb_reported_length_remaining(tvb, offset));
5049 | if (pinfo->desegment_len && pinfo->desegment_offset <= old_len) {
5050 | /*
5051 | * "desegment_len" isn't 0, so it needs more
5052 | * data for something - and "desegment_offset"
5053 | * is before "old_len", so it needs more data
5054 | * to dissect the stuff we thought was
5055 | * completely desegmented (as opposed to the
5056 | * stuff at the beginning being completely
5057 | * desegmented, but the stuff at the end
5058 | * being a new higher-level PDU that also
5059 | * needs desegmentation).
5060 | */
5061 | fragment_set_partial_reassembly(&ssh_reassembly_table,
5062 | pinfo, ssh_msp_fragment_id(msp), msp);
5063 | /* Update msp->nxtpdu to point to the new next
5064 | * pdu boundary.
5065 | */
5066 | if (pinfo->desegment_len == DESEGMENT_ONE_MORE_SEGMENT0x0fffffff) {
5067 | /* We want reassembly of at least one
5068 | * more segment so set the nxtpdu
5069 | * boundary to one byte into the next
5070 | * segment.
5071 | * This means that the next segment
5072 | * will complete reassembly even if it
5073 | * is only one single byte in length.
5074 | */
5075 | msp->nxtpdu = seq + tvb_reported_length_remaining(tvb, offset) + 1;
5076 | msp->flags |= MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001;
5077 | } else if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5078 | /* This is not the first segment, and we thought reassembly
5079 | * would be done now, but now we know we desegment at FIN.
5080 | * E.g., a HTTP response where the headers were split
5081 | * across segments (so previous ONE_MORE_SEGMENT) and
5082 | * also no Content-Length (so now DESEGMENT_UNTIL_FIN).
5083 | */
5084 | channel->flags |= TCP_FLOW_REASSEMBLE_UNTIL_FIN0x0001;
5085 | msp->nxtpdu = nxtseq + 0x40000000;
5086 | } else {
5087 | msp->nxtpdu = seq + tvb_reported_length_remaining(tvb, offset) + pinfo->desegment_len;
5088 | }
5089 | /* Since we need at least some more data
5090 | * there can be no pdu following in the
5091 | * tail of this segment.
5092 | */
5093 | another_pdu_follows = 0;
5094 | } else {
5095 | /*
5096 | * Show the stuff in this TCP segment as
5097 | * just raw TCP segment data.
5098 | */
5099 | nbytes = another_pdu_follows > 0
5100 | ? another_pdu_follows
5101 | : tvb_reported_length_remaining(tvb, offset);
5102 | ssh_proto_tree_add_segment_data(tree, tvb, offset, nbytes, NULL((void*)0));
5103 |
5104 | /* Show details of the reassembly */
5105 | print_ssh_fragment_tree(ipfd_head, proto_tree_get_root(tree), tree, pinfo, next_tvb);
5106 |
5107 | /* Did the subdissector ask us to desegment
5108 | * some more data? This means that the data
5109 | * at the beginning of this segment completed
5110 | * a higher-level PDU, but the data at the
5111 | * end of this segment started a higher-level
5112 | * PDU but didn't complete it.
5113 | *
5114 | * If so, we have to create some structures
5115 | * in our table, but this is something we
5116 | * only do the first time we see this packet.
5117 | */
5118 | if (pinfo->desegment_len) {
5119 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))
5120 | must_desegment = true1;
5121 |
5122 | /* The stuff we couldn't dissect
5123 | * must have come from this segment,
5124 | * so it's all in "tvb".
5125 | *
5126 | * "pinfo->desegment_offset" is
5127 | * relative to the beginning of
5128 | * "next_tvb"; we want an offset
5129 | * relative to the beginning of "tvb".
5130 | *
5131 | * First, compute the offset relative
5132 | * to the *end* of "next_tvb" - i.e.,
5133 | * the number of bytes before the end
5134 | * of "next_tvb" at which the
5135 | * subdissector stopped. That's the
5136 | * length of "next_tvb" minus the
5137 | * offset, relative to the beginning
5138 | * of "next_tvb, at which the
5139 | * subdissector stopped.
5140 | */
5141 | deseg_offset = ipfd_head->datalen - pinfo->desegment_offset;
5142 |
5143 | /* "tvb" and "next_tvb" end at the
5144 | * same byte of data, so the offset
5145 | * relative to the end of "next_tvb"
5146 | * of the byte at which we stopped
5147 | * is also the offset relative to
5148 | * the end of "tvb" of the byte at
5149 | * which we stopped.
5150 | *
5151 | * Convert that back into an offset
5152 | * relative to the beginning of
5153 | * "tvb", by taking the length of
5154 | * "tvb" and subtracting the offset
5155 | * relative to the end.
5156 | */
5157 | deseg_offset = tvb_reported_length(tvb) - deseg_offset;
5158 | }
5159 | }
5160 | }
5161 | }
5162 |
5163 | if (must_desegment) {
5164 | /* If the dissector requested "reassemble until FIN"
5165 | * just set this flag for the flow and let reassembly
5166 | * proceed at normal. We will check/pick up these
5167 | * reassembled PDUs later down in dissect_tcp() when checking
5168 | * for the FIN flag.
5169 | */
5170 | if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5171 | channel->flags |= TCP_FLOW_REASSEMBLE_UNTIL_FIN0x0001;
5172 | }
5173 | /*
5174 | * The sequence number at which the stuff to be desegmented
5175 | * starts is the sequence number of the byte at an offset
5176 | * of "deseg_offset" into "tvb".
5177 | *
5178 | * The sequence number of the byte at an offset of "offset"
5179 | * is "seq", i.e. the starting sequence number of this
5180 | * segment, so the sequence number of the byte at
5181 | * "deseg_offset" is "seq + (deseg_offset - offset)".
5182 | */
5183 | deseg_seq = seq + (deseg_offset - offset);
5184 |
5185 | if (((nxtseq - deseg_seq) <= 1024*1024)
5186 | && (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))) {
5187 | if (pinfo->desegment_len == DESEGMENT_ONE_MORE_SEGMENT0x0fffffff) {
5188 | /* The subdissector asked to reassemble using the
5189 | * entire next segment.
5190 | * Just ask reassembly for one more byte
5191 | * but set this msp flag so we can pick it up
5192 | * above.
5193 | */
5194 | msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5195 | deseg_seq, nxtseq+1, channel->multisegment_pdus);
5196 | msp->flags |= MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001;
5197 | } else if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5198 | /* Set nxtseq very large so that reassembly won't happen
5199 | * until we force it at the end of the stream in dissect_ssl()
5200 | * outside this function.
5201 | */
5202 | msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5203 | deseg_seq, nxtseq+0x40000000, channel->multisegment_pdus);
5204 | } else {
5205 | msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5206 | deseg_seq, nxtseq+pinfo->desegment_len, channel->multisegment_pdus);
5207 | }
5208 |
5209 | /* add this segment as the first one for this new pdu */
5210 | fragment_add(&ssh_reassembly_table, tvb, deseg_offset,
5211 | pinfo, ssh_msp_fragment_id(msp), msp,
5212 | 0, nxtseq - deseg_seq,
5213 | LT_SEQ(nxtseq, msp->nxtpdu)((int32_t)((nxtseq) - (msp->nxtpdu)) < 0));
5214 | }
5215 | }
5216 |
5217 | if (!called_dissector || pinfo->desegment_len != 0) {
5218 | if (ipfd_head != NULL((void*)0) && ipfd_head->reassembled_in != 0 &&
5219 | ipfd_head->reassembled_in != pinfo->num &&
5220 | !(ipfd_head->flags & FD_PARTIAL_REASSEMBLY0x0040)) {
5221 | /*
5222 | * We know what other frame this PDU is reassembled in;
5223 | * let the user know.
5224 | */
5225 | item=proto_tree_add_uint(tree, *ssh_segment_items.hf_reassembled_in,
5226 | tvb, 0, 0, ipfd_head->reassembled_in);
5227 | proto_item_set_generated(item);
5228 | }
5229 |
5230 | /*
5231 | * Either we didn't call the subdissector at all (i.e.,
5232 | * this is a segment that contains the middle of a
5233 | * higher-level PDU, but contains neither the beginning
5234 | * nor the end), or the subdissector couldn't dissect it
5235 | * all, as some data was missing (i.e., it set
5236 | * "pinfo->desegment_len" to the amount of additional
5237 | * data it needs).
5238 | */
5239 | if (!another_segment_in_frame && pinfo->desegment_offset == 0) {
5240 | /*
5241 | * It couldn't, in fact, dissect any of it (the
5242 | * first byte it couldn't dissect is at an offset
5243 | * of "pinfo->desegment_offset" from the beginning
5244 | * of the payload, and that's 0).
5245 | * Just mark this as SSH.
5246 | */
5247 |
5248 | /* SFTP checks the length before setting the protocol column.
5249 | * If other subdissectors don't do this, we'd want to set the
5250 | * protocol column back - but we want to get the SSH version
5251 | */
5252 | //col_set_str(pinfo->cinfo, COL_PROTOCOL,
5253 | // val_to_str_const(session->version, ssl_version_short_names, "SSH"));
5254 | if (first_pdu) {
5255 | col_append_sep_str(pinfo->cinfo, COL_INFO, " ", "[SSH segment of a reassembled PDU]");
5256 | }
5257 | }
5258 |
5259 | /*
5260 | * Show what's left in the packet as just raw SSH segment data.
5261 | * XXX - remember what protocol the last subdissector
5262 | * was, and report it as a continuation of that, instead?
5263 | */
5264 | nbytes = tvb_reported_length_remaining(tvb, deseg_offset);
5265 | ssh_proto_tree_add_segment_data(tree, tvb, deseg_offset, nbytes, NULL((void*)0));
5266 | }
5267 | pinfo->can_desegment = 0;
5268 | pinfo->desegment_offset = 0;
5269 | pinfo->desegment_len = 0;
5270 |
5271 | if (another_pdu_follows) {
5272 | /* there was another pdu following this one. */
5273 | pinfo->can_desegment=2;
5274 | /* we also have to prevent the dissector from changing the
5275 | * PROTOCOL and INFO colums since what follows may be an
5276 | * incomplete PDU and we don't want it be changed back from
5277 | * <Protocol> to <SSH>
5278 | */
5279 | col_set_fence(pinfo->cinfo, COL_INFO);
5280 | col_set_writable(pinfo->cinfo, COL_PROTOCOL, false0);
5281 | first_pdu = false0;
5282 | offset += another_pdu_follows;
5283 | seq += another_pdu_follows;
5284 | goto again;
5285 | }
5286 | }
5287 |
5288 | static void
5289 | ssh_dissect_channel_data(tvbuff_t *tvb, packet_info *pinfo,
5290 | struct ssh_peer_data *peer_data _U___attribute__((unused)), proto_tree *tree,
5291 | ssh_message_info_t *message _U___attribute__((unused)), ssh_channel_info_t *channel)
5292 | {
5293 |
5294 | uint16_t save_can_desegment = pinfo->can_desegment;
5295 |
5296 | if (ssh_desegment) {
5297 | pinfo->can_desegment = 2;
5298 | desegment_ssh(tvb, pinfo, message->byte_seq, message->next_byte_seq, tree, channel);
5299 | } else {
5300 | pinfo->can_desegment = 0;
5301 | bool_Bool save_fragmented = pinfo->fragmented;
5302 | pinfo->fragmented = true1;
5303 |
5304 | ssh_process_payload(tvb, 0, pinfo, tree, channel);
5305 | pinfo->fragmented = save_fragmented;
5306 | }
5307 |
5308 | pinfo->can_desegment = save_can_desegment;
5309 | }
5310 |
5311 | static int
5312 | ssh_dissect_term_modes(tvbuff_t *tvb, packet_info *pinfo _U___attribute__((unused)), proto_tree *tree)
5313 | {
5314 | proto_item *ti;
5315 | proto_tree *term_mode_tree, *subtree;
5316 | int offset = 0;
5317 | uint32_t opcode, value, idx;
5318 | bool_Bool boolval;
5319 |
5320 | struct tty_opt_info {
5321 | unsigned id;
5322 | int *hfindex;
5323 | };
5324 | static const struct tty_opt_info tty_opts[] = {
5325 | { SSH_TTY_OP_END0, NULL((void*)0)},
5326 | { SSH_TTY_OP_VINTR1, &hf_ssh_pty_term_mode_vintr },
5327 | { SSH_TTY_OP_VQUIT2, &hf_ssh_pty_term_mode_vquit },
5328 | { SSH_TTY_OP_VERASE3, &hf_ssh_pty_term_mode_verase },
5329 | { SSH_TTY_OP_VKILL4, &hf_ssh_pty_term_mode_vkill },
5330 | { SSH_TTY_OP_VEOF5, &hf_ssh_pty_term_mode_veof },
5331 | { SSH_TTY_OP_VEOL6, &hf_ssh_pty_term_mode_veol },
5332 | { SSH_TTY_OP_VEOL27, &hf_ssh_pty_term_mode_veol2 },
5333 | { SSH_TTY_OP_VSTART8, &hf_ssh_pty_term_mode_vstart },
5334 | { SSH_TTY_OP_VSTOP9, &hf_ssh_pty_term_mode_vstop },
5335 | { SSH_TTY_OP_VSUSP10, &hf_ssh_pty_term_mode_vsusp },
5336 | { SSH_TTY_OP_VDSUSP11, &hf_ssh_pty_term_mode_vdsusp },
5337 | { SSH_TTY_OP_VREPRINT12, &hf_ssh_pty_term_mode_vreprint },
5338 | { SSH_TTY_OP_VWERASE13, &hf_ssh_pty_term_mode_vwerase },
5339 | { SSH_TTY_OP_VLNEXT14, &hf_ssh_pty_term_mode_vlnext },
5340 | { SSH_TTY_OP_VFLUSH15, &hf_ssh_pty_term_mode_vflush },
5341 | { SSH_TTY_OP_VSWTCH16, &hf_ssh_pty_term_mode_vswtch },
5342 | { SSH_TTY_OP_VSTATUS17, &hf_ssh_pty_term_mode_vstatus },
5343 | { SSH_TTY_OP_VDISCARD18, &hf_ssh_pty_term_mode_vdiscard },
5344 | { SSH_TTY_OP_IGNPAR30, &hf_ssh_pty_term_mode_ignpar },
5345 | { SSH_TTY_OP_PARMRK31, &hf_ssh_pty_term_mode_parmrk },
5346 | { SSH_TTY_OP_INPCK32, &hf_ssh_pty_term_mode_inpck },
5347 | { SSH_TTY_OP_ISTRIP33, &hf_ssh_pty_term_mode_istrip },
5348 | { SSH_TTY_OP_INLCR34, &hf_ssh_pty_term_mode_inlcr },
5349 | { SSH_TTY_OP_IGNCR35, &hf_ssh_pty_term_mode_igncr },
5350 | { SSH_TTY_OP_ICRNL36, &hf_ssh_pty_term_mode_icrnl },
5351 | { SSH_TTY_OP_IUCLC37, &hf_ssh_pty_term_mode_iuclc },
5352 | { SSH_TTY_OP_IXON38, &hf_ssh_pty_term_mode_ixon },
5353 | { SSH_TTY_OP_IXANY39, &hf_ssh_pty_term_mode_ixany },
5354 | { SSH_TTY_OP_IXOFF40, &hf_ssh_pty_term_mode_ixoff },
5355 | { SSH_TTY_OP_IMAXBEL41, &hf_ssh_pty_term_mode_imaxbel },
5356 | { SSH_TTY_OP_IUTF842, &hf_ssh_pty_term_mode_iutf8 },
5357 | { SSH_TTY_OP_ISIG50, &hf_ssh_pty_term_mode_isig },
5358 | { SSH_TTY_OP_ICANON51, &hf_ssh_pty_term_mode_icanon },
5359 | { SSH_TTY_OP_XCASE52, &hf_ssh_pty_term_mode_xcase },
5360 | { SSH_TTY_OP_ECHO53, &hf_ssh_pty_term_mode_echo },
5361 | { SSH_TTY_OP_ECHOE54, &hf_ssh_pty_term_mode_echoe },
5362 | { SSH_TTY_OP_ECHOK55, &hf_ssh_pty_term_mode_echok },
5363 | { SSH_TTY_OP_ECHONL56, &hf_ssh_pty_term_mode_echonl },
5364 | { SSH_TTY_OP_NOFLSH57, &hf_ssh_pty_term_mode_noflsh },
5365 | { SSH_TTY_OP_TOSTOP58, &hf_ssh_pty_term_mode_tostop },
5366 | { SSH_TTY_OP_IEXTEN59, &hf_ssh_pty_term_mode_iexten },
5367 | { SSH_TTY_OP_ECHOCTL60, &hf_ssh_pty_term_mode_echoctl },
5368 | { SSH_TTY_OP_ECHOKE61, &hf_ssh_pty_term_mode_echoke },
5369 | { SSH_TTY_OP_PENDIN62, &hf_ssh_pty_term_mode_pendin },
5370 | { SSH_TTY_OP_OPOST70, &hf_ssh_pty_term_mode_opost },
5371 | { SSH_TTY_OP_OLCUC71, &hf_ssh_pty_term_mode_olcuc },
5372 | { SSH_TTY_OP_ONLCR72, &hf_ssh_pty_term_mode_onlcr },
5373 | { SSH_TTY_OP_OCRNL73, &hf_ssh_pty_term_mode_ocrnl },
5374 | { SSH_TTY_OP_ONOCR74, &hf_ssh_pty_term_mode_onocr },
5375 | { SSH_TTY_OP_ONLRET75, &hf_ssh_pty_term_mode_onlret },
5376 | { SSH_TTY_OP_CS790, &hf_ssh_pty_term_mode_cs7 },
5377 | { SSH_TTY_OP_CS891, &hf_ssh_pty_term_mode_cs8 },
5378 | { SSH_TTY_OP_PARENB92, &hf_ssh_pty_term_mode_parenb },
5379 | { SSH_TTY_OP_PARODD93, &hf_ssh_pty_term_mode_parodd },
5380 | { SSH_TTY_OP_ISPEED128, &hf_ssh_pty_term_mode_ispeed },
5381 | { SSH_TTY_OP_OSPEED129, &hf_ssh_pty_term_mode_ospeed }
5382 | };
5383 |
5384 | ti = proto_tree_add_item(tree, hf_ssh_pty_term_modes, tvb, offset, tvb_reported_length(tvb), ENC_NA0x00000000);
5385 | term_mode_tree = proto_item_add_subtree(ti, ett_term_modes);
5386 | while (tvb_reported_length_remaining(tvb, offset)) {
5387 | ti = proto_tree_add_item(term_mode_tree, hf_ssh_pty_term_mode, tvb, offset, 5, ENC_NA0x00000000);
5388 | subtree = proto_item_add_subtree(ti, ett_term_mode);
5389 | proto_tree_add_item_ret_uint(subtree, hf_ssh_pty_term_mode_opcode, tvb, offset, 1, ENC_NA0x00000000, &opcode);
5390 | proto_item_append_text(ti, ": %s", val_to_str_const(opcode, ssh_tty_op_vals, "Unknown"));
5391 | offset += 1;
5392 | if (opcode == SSH_TTY_OP_END0) {
5393 | break;
5394 | }
5395 | for (idx = 0; idx < array_length(tty_opts)(sizeof (tty_opts) / sizeof (tty_opts)[0]); idx++) {
5396 | if (tty_opts[idx].id == opcode) break;
5397 | }
5398 | if (idx >= array_length(tty_opts)(sizeof (tty_opts) / sizeof (tty_opts)[0])) {
5399 | proto_tree_add_item_ret_uint(subtree, hf_ssh_pty_term_mode_value, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &value);
5400 | proto_item_append_text(ti, "=%d", value);
5401 | } else {
5402 | 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" , 5402, "tty_opts[idx].hfindex"))));
5403 | int hfindex = *tty_opts[idx].hfindex;
5404 | switch (proto_registrar_get_ftype(hfindex)) {
5405 | case FT_BOOLEAN:
5406 | proto_tree_add_item_ret_boolean(subtree, hfindex, tvb, offset + 3, 1, ENC_NA0x00000000, &boolval);
5407 | proto_item_append_text(ti, "=%s", boolval ? "True" : "False");
5408 | break;
5409 | case FT_CHAR:
5410 | proto_tree_add_item_ret_uint(subtree, hfindex, tvb, offset + 3, 1, ENC_NA0x00000000, &value);
5411 | proto_item_append_text(ti, "='%s'", format_char(pinfo->pool, (char)value));
5412 | break;
5413 | case FT_UINT32:
5414 | proto_tree_add_item_ret_uint(subtree, hfindex, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &value);
5415 | proto_item_append_text(ti, "=%d", value);
5416 | break;
5417 | default:
5418 | DISSECTOR_ASSERT_NOT_REACHED()(proto_report_dissector_bug("%s:%u: failed assertion \"DISSECTOR_ASSERT_NOT_REACHED\"" , "epan/dissectors/packet-ssh.c", 5418));
5419 | }
5420 | }
5421 | offset += 4;
5422 | }
5423 | return offset;
5424 | }
5425 |
5426 | static int
5427 | ssh_dissect_connection_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
5428 | struct ssh_peer_data *peer_data, int offset, proto_tree *msg_type_tree,
5429 | unsigned msg_code, ssh_message_info_t *message)
5430 | {
5431 | uint32_t recipient_channel, sender_channel;
5432 |
5433 | if (msg_code == SSH_MSG_CHANNEL_OPEN90) {
5434 | uint32_t slen;
5435 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_type_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5436 | offset += 4;
5437 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_type_name, packet_tvb, offset, slen, ENC_UTF_80x00000002);
5438 | offset += slen;
5439 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_sender_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5440 | offset += 4;
5441 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_initial_window, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5442 | offset += 4;
5443 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_maximum_packet_size, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5444 | offset += 4;
5445 | } else if (msg_code == SSH_MSG_CHANNEL_OPEN_CONFIRMATION91) {
5446 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &recipient_channel);
5447 | offset += 4;
5448 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_sender_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &sender_channel);
5449 | offset += 4;
5450 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5451 | create_channel(peer_data, recipient_channel, sender_channel);
5452 | }
5453 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_initial_window, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5454 | offset += 4;
5455 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_maximum_packet_size, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5456 | offset += 4;
5457 | } else if (msg_code == SSH_MSG_CHANNEL_WINDOW_ADJUST93) {
5458 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5459 | offset += 4;
5460 | 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
5461 | offset += 4;
5462 | } else if (msg_code == SSH_MSG_CHANNEL_DATA94) {
5463 | 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);
5464 | offset += 4;
5465 | // TODO: process according to the type of channel
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_EXTENDED_DATA95) {
5484 | 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);
5485 | offset += 4;
5486 | // TODO: process according to the type of channel
5487 | proto_tree_add_item(msg_type_tree, hf_ssh_channel_data_type_code, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5488 | offset += 4;
5489 | uint32_t slen;
5490 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_data_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5491 | offset += 4;
5492 | tvbuff_t* next_tvb = tvb_new_subset_length(packet_tvb, offset, slen);
5493 |
5494 | ssh_channel_info_t* channel = get_channel_info_for_channel(peer_data, recipient_channel);
5495 | if (channel) {
5496 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5497 | message->byte_seq = channel->byte_seq;
5498 | channel->byte_seq += slen;
5499 | message->next_byte_seq = channel->byte_seq;
5500 | }
5501 | ssh_dissect_channel_data(next_tvb, pinfo, peer_data, msg_type_tree, message, channel);
5502 | } else {
5503 | expert_add_info_format(pinfo, ti, &ei_ssh_channel_number, "Could not find configuration for channel %d", recipient_channel);
5504 | }
5505 | offset += slen;
5506 | } else if (msg_code == SSH_MSG_CHANNEL_EOF96) {
5507 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5508 | offset += 4;
5509 | } else if (msg_code == SSH_MSG_CHANNEL_CLOSE97) {
5510 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5511 | offset += 4;
5512 | } else if (msg_code == SSH_MSG_CHANNEL_REQUEST98) {
5513 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &recipient_channel);
5514 | offset += 4;
5515 | const char* request_name;
5516 | uint32_t slen;
5517 | int item_len;
5518 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_request_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5519 | offset += 4;
5520 | 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);
5521 | offset += slen;
5522 | proto_tree_add_item(msg_type_tree, hf_ssh_channel_request_want_reply, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5523 | offset += 1;
5524 | /* RFC 4254 6.5: "Only one of these requests ["shell", "exec",
5525 | * or "subsystem"] can succeed per channel." Set up the
5526 | * appropriate handler for future CHANNEL_DATA and
5527 | * CHANNEL_EXTENDED_DATA messages on the channel.
5528 | *
5529 | * XXX - For "shell" and "exec", it might make more sense to send
5530 | * CHANNEL_DATA to the "data-text-lines" dissector rather than "data".
5531 | * Ideally if a pty has been setup there would be a way to interpret
5532 | * the escape codes.
5533 | */
5534 | if (0 == strcmp(request_name, "subsystem")) {
5535 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_subsystem_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5536 | offset += 4;
5537 | const char* subsystem_name;
5538 | 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);
5539 | set_subdissector_for_channel(peer_data, recipient_channel, subsystem_name);
5540 | offset += slen;
5541 | } else if (0 == strcmp(request_name, "env")) {
5542 | /* The encoding for "env" variables and "exec" commands is not
5543 | * specified in the SSH protocol, and must match whatever the
5544 | * server expects. (Unlike CHANNEL_DATA, it is not affected by
5545 | * whatever is in "env" or anything else in the protocol, and the
5546 | * strings are passed to execve directly.) In practice the strings
5547 | * must not have internal NULs (no UTF-16), and OpenSSH for Windows
5548 | * and IBM z/OS force the use of UTF-8 and ISO-8859-1, respectively.
5549 | *
5550 | * These will probably be ASCII-compatible.
5551 | */
5552 | 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);
5553 | offset += item_len;
5554 | 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);
5555 | offset += item_len;
5556 | } else if (0 == strcmp(request_name, "exec")) {
5557 | 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);
5558 | offset += item_len;
5559 | set_subdissector_for_channel(peer_data, recipient_channel, "exec");
5560 | } else if (0 == strcmp(request_name, "exit-status")) {
5561 | proto_tree_add_item(msg_type_tree, hf_ssh_exit_status, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5562 | offset += 4;
5563 | } else if (0 == strcmp(request_name, "shell")) {
5564 | set_subdissector_for_channel(peer_data, recipient_channel, "shell");
5565 | } else if (0 == strcmp(request_name, "pty-req")) {
5566 | 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);
5567 | offset += item_len;
5568 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_width_char, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5569 | offset += 4;
5570 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_height_row, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5571 | offset += 4;
5572 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_width_pixel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5573 | offset += 4;
5574 | proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_height_pixel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5575 | offset += 4;
5576 | proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_pty_term_modes_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5577 | offset += 4;
5578 | offset += ssh_dissect_term_modes(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
5579 | }
5580 | } else if (msg_code == SSH_MSG_CHANNEL_SUCCESS99) {
5581 | proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5582 | offset += 4;
5583 | }
5584 | return offset;
5585 | }
5586 |
5587 | /* Channel mapping {{{ */
5588 |
5589 | /* The usual flow:
5590 | * 1. client sends SSH_MSG_CHANNEL_OPEN with its (sender) channel number
5591 | * 2. server responds with SSH_MSG_CHANNEL_OPEN_CONFIRMATION with
5592 | * its channel number and echoing the client's number, creating
5593 | * a bijective map
5594 | * 3. client sends SSH_MSG_CHANNEL_REQUEST which has the name of
5595 | * the shell, command, or subsystem to start. This has the recipient's
5596 | * channel number (i.e. the server's)
5597 | * 4. server may send back a SSG_MSG_CHANNEL_SUCCESS (or _FAILURE) with
5598 | * the the recipient (i.e., client) channel number, but this does not
5599 | * contain the subsystem name or anything identifying the request to
5600 | * which it responds. It MUST be sent in the same order as the
5601 | * corresponding request message (RFC 4254 4 Global Requests), so we
5602 | * could track it that way, but for our purposes we just treat all
5603 | * requests as successes. (If not, either there won't be data or another
5604 | * request will supercede it later.)
5605 | *
5606 | * Either side can open a channel (RFC 4254 5 Channel Mechanism). The
5607 | * typical flow is the client opening a channel, but in the case of
5608 | * remote port forwarding (7 TCP/IP Port Forwarding) the directions are
5609 | * swapped. For port forwarding, all the information is contained in the
5610 | * SSH_MSG_CHANNEL_OPEN, there is no SSH_MSG_CHANNEL_REQUEST.
5611 | *
5612 | * XXX: Channel numbers can be re-used after being closed (5.3 Closing a
5613 | * Channel), but not necessarily mapped to the same channel number on the
5614 | * other side. If that actually happens, the right way to handle this is
5615 | * to track the state changes over time for random packet access (e.g.,
5616 | * using a multimap with the packet number instead of maps.)
5617 | */
5618 |
5619 | static struct ssh_peer_data*
5620 | get_other_peer_data(struct ssh_peer_data *peer_data)
5621 | {
5622 | bool_Bool is_server = &peer_data->global_data->peer_data[SERVER_PEER_DATA1]==peer_data;
5623 | if (is_server) {
5624 | return &peer_data->global_data->peer_data[CLIENT_PEER_DATA0];
5625 | } else {
5626 | return &peer_data->global_data->peer_data[SERVER_PEER_DATA1];
5627 | }
5628 | }
5629 |
5630 | /* Create pairings between a recipient channel and the sender's channel,
5631 | * from a SSH_MSG_CHANNEL_OPEN_CONFIRMATION. */
5632 | static void
5633 | create_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, uint32_t sender_channel)
5634 | {
5635 | if (peer_data->channel_info == NULL((void*)0)) {
5636 | peer_data->channel_info = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5637 | }
5638 | 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)));
5639 |
5640 | if (peer_data->channel_handles == NULL((void*)0)) {
5641 | peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5642 | }
5643 |
5644 | 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)));
5645 | new_channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5646 | wmem_map_insert(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), new_channel);
5647 |
5648 | /* If the recipient channel is already configured in the other direction,
5649 | * set the handle. We need this if we eventually handle port forwarding,
5650 | * where all the information to handle the traffic is sent in the
5651 | * SSH_MSG_CHANNEL_OPEN message before the CONFIRMATION. It might also
5652 | * help if the packets are out of order (i.e. we get the client
5653 | * CHANNEL_REQUEST before the CHANNEL_OPEN_CONFIRMATION.)
5654 | */
5655 | struct ssh_peer_data *other_peer_data = get_other_peer_data(peer_data);
5656 | if (other_peer_data->channel_handles) {
5657 | ssh_channel_info_t *peer_channel = wmem_map_lookup(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)));
5658 | if (peer_channel) {
5659 | new_channel->handle = peer_channel->handle;
5660 | }
5661 | }
5662 | }
5663 |
5664 | static ssh_channel_info_t*
5665 | get_channel_info_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel)
5666 | {
5667 | if (peer_data->channel_handles == NULL((void*)0)) {
5668 | return NULL((void*)0);
5669 | }
5670 | ssh_channel_info_t *channel = wmem_map_lookup(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)));
5671 |
5672 | return channel;
5673 | }
5674 |
5675 | static void
5676 | set_subdissector_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, const char* subsystem_name)
5677 | {
5678 | dissector_handle_t handle = NULL((void*)0);
5679 | if (0 == strcmp(subsystem_name, "sftp")) {
5680 | handle = sftp_handle;
5681 | } else if (0 == strcmp(subsystem_name, "shell") ||
5682 | 0 == strcmp(subsystem_name, "exec")) {
5683 | handle = data_text_lines_handle;
5684 | }
5685 |
5686 | if (handle) {
5687 | /* Map this handle to the recipient channel */
5688 | ssh_channel_info_t *channel = NULL((void*)0);
5689 | if (peer_data->channel_handles == NULL((void*)0)) {
5690 | peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5691 | } else {
5692 | channel = wmem_map_lookup(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_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(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), channel);
5698 | }
5699 | channel->handle = handle;
5700 |
5701 | /* This recipient channel is the sender channel for the other side.
5702 | * Do we know what the recipient channel on the other side is? */
5703 | struct ssh_peer_data *other_peer_data = get_other_peer_data(peer_data);
5704 |
5705 | wmem_map_t *channel_info = other_peer_data->channel_info;
5706 | if (channel_info) {
5707 | void *sender_channel_p;
5708 | if (wmem_map_lookup_extended(channel_info, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), NULL((void*)0), &sender_channel_p)) {
5709 | uint32_t sender_channel = GPOINTER_TO_UINT(sender_channel_p)((guint) (gulong) (sender_channel_p));
5710 | /* Yes. See the handle for the other side too. */
5711 | if (other_peer_data->channel_handles == NULL((void*)0)) {
5712 | other_peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5713 | channel = NULL((void*)0);
5714 | } else {
5715 | channel = wmem_map_lookup(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)));
5716 | }
5717 | if (channel == NULL((void*)0)) {
5718 | channel = wmem_new0(wmem_file_scope(), ssh_channel_info_t)((ssh_channel_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (ssh_channel_info_t)));
5719 | channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5720 | wmem_map_insert(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)), channel);
5721 | }
5722 | channel->handle = handle;
5723 | }
5724 | }
5725 | }
5726 | }
5727 |
5728 | /* Channel mapping. }}} */
5729 |
5730 | static int
5731 | ssh_dissect_connection_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
5732 | int offset, proto_item *msg_type_tree, unsigned msg_code)
5733 | {
5734 | (void)pinfo;
5735 | if(msg_code==SSH_MSG_GLOBAL_REQUEST80){
5736 | const char* request_name;
5737 | unsigned slen;
5738 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5739 | proto_tree_add_item(msg_type_tree, hf_ssh_global_request_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5740 | offset += 4;
5741 | request_name = (char*)tvb_get_string_enc(pinfo->pool, packet_tvb, offset, slen, ENC_ASCII0x00000000|ENC_NA0x00000000);
5742 | proto_tree_add_item(msg_type_tree, hf_ssh_global_request_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
5743 | offset += slen;
5744 | proto_tree_add_item(msg_type_tree, hf_ssh_global_request_want_reply, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5745 | offset += 1;
5746 | if (0 == strcmp(request_name, "hostkeys-00@openssh.com") ||
5747 | 0 == strcmp(request_name, "hostkeys-prove-00@openssh.com")) {
5748 | while (tvb_reported_length_remaining(packet_tvb, offset)) {
5749 | offset += ssh_tree_add_hostkey(packet_tvb, pinfo, offset, msg_type_tree,
5750 | "Server host key", ett_key_exchange_host_key, NULL((void*)0));
5751 | }
5752 | }
5753 | }
5754 | return offset;
5755 | }
5756 |
5757 | static int
5758 | ssh_dissect_local_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
5759 | int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code) {
5760 | unsigned slen;
5761 | if (peer_data->global_data->ext_ping_openssh_offered && msg_code >= SSH_MSG_PING192 && msg_code <= SSH_MSG_PONG193) {
5762 | 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)"));
5763 | proto_tree_add_item(msg_type_tree, hf_ssh2_ext_ping_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5764 | offset += 1;
5765 | if (msg_code == SSH_MSG_PING192) {
5766 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5767 | proto_tree_add_item(msg_type_tree, hf_ssh_ping_data_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5768 | offset += 4;
5769 | proto_tree_add_item(msg_type_tree, hf_ssh_ping_data, packet_tvb, offset, slen, ENC_NA0x00000000);
5770 | offset += slen;
5771 | } else if (msg_code == SSH_MSG_PONG193) {
5772 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5773 | proto_tree_add_item(msg_type_tree, hf_ssh_pong_data_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5774 | offset += 4;
5775 | proto_tree_add_item(msg_type_tree, hf_ssh_pong_data, packet_tvb, offset, slen, ENC_NA0x00000000);
5776 | offset += slen;
5777 | }
5778 | } else {
5779 | col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
5780 | proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5781 | offset += 1;
5782 | }
5783 | return offset;
5784 | }
5785 |
5786 | static int
5787 | ssh_dissect_public_key_blob(tvbuff_t *tvb, packet_info *pinfo, proto_item *tree)
5788 | {
5789 | uint32_t slen;
5790 | const char* key_type;
5791 |
5792 | int offset = 0;
5793 | proto_tree *blob_tree = NULL((void*)0);
5794 | proto_item *blob_item = NULL((void*)0);
5795 |
5796 | blob_item = proto_tree_add_item(tree, hf_ssh_blob, tvb, offset, tvb_reported_length(tvb), ENC_NA0x00000000);
5797 | blob_tree = proto_item_add_subtree(blob_item, ett_userauth_pk_blob);
5798 | proto_tree_add_item_ret_uint(blob_tree, hf_ssh_pk_blob_name_length, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5799 | offset += 4;
5800 | 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);
5801 | proto_item_append_text(blob_item, " (type: %s)", key_type);
5802 | offset += slen;
5803 |
5804 | if (0 == strcmp(key_type, "ssh-rsa")) {
5805 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_e);
5806 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_n);
5807 | } else if (0 == strcmp(key_type, "ssh-dss")) {
5808 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_p);
5809 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_q);
5810 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_g);
5811 | offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_y);
5812 | } 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-" ) )) {
5813 | offset += ssh_tree_add_string(tvb, offset, blob_tree,
5814 | hf_ssh_blob_ecdsa_curve_id, hf_ssh_blob_ecdsa_curve_id_length);
5815 | offset += ssh_tree_add_string(tvb, offset, blob_tree,
5816 | hf_ssh_blob_ecdsa_q, hf_ssh_blob_ecdsa_q_length);
5817 | } 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") )) {
5818 | offset += ssh_tree_add_string(tvb, offset, blob_tree,
5819 | hf_ssh_blob_eddsa_key, hf_ssh_blob_eddsa_key_length);
5820 | } else {
5821 | proto_tree_add_item(blob_tree, hf_ssh_blob_data, tvb, offset, tvb_reported_length_remaining(tvb, offset), ENC_NA0x00000000);
5822 | offset += tvb_reported_length_remaining(tvb, offset);
5823 | }
5824 |
5825 | return offset;
5826 | }
5827 |
5828 | static int
5829 | ssh_dissect_public_key_signature(tvbuff_t *packet_tvb, packet_info *pinfo,
5830 | int offset, proto_item *msg_type_tree)
5831 | {
5832 | (void)pinfo;
5833 | unsigned slen;
5834 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5835 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_blob_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5836 | offset += 4;
5837 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_blob_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
5838 | offset += slen;
5839 | slen = tvb_get_ntohl(packet_tvb, offset) ;
5840 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_s_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5841 | offset += 4;
5842 | proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_s, packet_tvb, offset, slen, ENC_NA0x00000000);
5843 | offset += slen;
5844 | return offset;
5845 | }
5846 |
5847 | #ifdef SSH_DECRYPT_DEBUG /* {{{ */
5848 |
5849 | static FILE* ssh_debug_file;
5850 |
5851 | static void
5852 | ssh_prefs_apply_cb(void)
5853 | {
5854 | ssh_set_debug(ssh_debug_file_name);
5855 | }
5856 |
5857 | static void
5858 | ssh_set_debug(const char* name)
5859 | {
5860 | static int debug_file_must_be_closed;
5861 | int use_stderr;
5862 |
5863 | use_stderr = name?(strcmp(name, SSH_DEBUG_USE_STDERR"-") == 0):0;
5864 |
5865 | if (debug_file_must_be_closed)
5866 | fclose(ssh_debug_file);
5867 |
5868 | if (use_stderr)
5869 | ssh_debug_file = stderrstderr;
5870 | else if (!name || (strcmp(name, "") ==0))
5871 | ssh_debug_file = NULL((void*)0);
5872 | else
5873 | ssh_debug_file = ws_fopenfopen(name, "w");
5874 |
5875 | if (!use_stderr && ssh_debug_file)
5876 | debug_file_must_be_closed = 1;
5877 | else
5878 | debug_file_must_be_closed = 0;
5879 |
5880 | ssh_debug_printf("Wireshark SSH debug log \n\n");
5881 | #ifdef HAVE_LIBGNUTLS1
5882 | ssh_debug_printf("GnuTLS version: %s\n", gnutls_check_version(NULL((void*)0)));
5883 | #endif
5884 | ssh_debug_printf("Libgcrypt version: %s\n", gcry_check_version(NULL((void*)0)));
5885 | ssh_debug_printf("\n");
5886 | }
5887 |
5888 | static void
5889 | ssh_debug_flush(void)
5890 | {
5891 | if (ssh_debug_file)
5892 | fflush(ssh_debug_file);
5893 | }
5894 |
5895 | static void
5896 | ssh_debug_printf(const char* fmt, ...)
5897 | {
5898 | va_list ap;
5899 |
5900 | if (!ssh_debug_file)
5901 | return;
5902 |
5903 | va_start(ap, fmt)__builtin_va_start(ap, fmt);
5904 | vfprintf(ssh_debug_file, fmt, ap);
5905 | va_end(ap)__builtin_va_end(ap);
5906 | }
5907 |
5908 | static void
5909 | ssh_print_data(const char* name, const unsigned char* data, size_t len)
5910 | {
5911 | size_t i, j, k;
5912 | if (!ssh_debug_file)
5913 | return;
5914 | #ifdef OPENSSH_STYLE
5915 | fprintf(ssh_debug_file,"%s[%d]\n",name, (int) len);
5916 | #else
5917 | fprintf(ssh_debug_file,"%s[%d]:\n",name, (int) len);
5918 | #endif
5919 | for (i=0; i<len; i+=16) {
5920 | #ifdef OPENSSH_STYLE
5921 | fprintf(ssh_debug_file,"%04u: ", (unsigned int)i);
5922 | #else
5923 | fprintf(ssh_debug_file,"| ");
5924 | #endif
5925 | for (j=i, k=0; k<16 && j<len; ++j, ++k)
5926 | fprintf(ssh_debug_file,"%.2x ",data[j]);
5927 | for (; k<16; ++k)
5928 | fprintf(ssh_debug_file," ");
5929 | #ifdef OPENSSH_STYLE
5930 | fputc(' ', ssh_debug_file);
5931 | #else
5932 | fputc('|', ssh_debug_file);
5933 | #endif
5934 | for (j=i, k=0; k<16 && j<len; ++j, ++k) {
5935 | unsigned char c = data[j];
5936 | if (!g_ascii_isprint(c)((g_ascii_table[(guchar) (c)] & G_ASCII_PRINT) != 0) || (c=='\t')) c = '.';
5937 | fputc(c, ssh_debug_file);
5938 | }
5939 | #ifdef OPENSSH_STYLE
5940 | fprintf(ssh_debug_file,"\n");
5941 | #else
5942 | for (; k<16; ++k)
5943 | fputc(' ', ssh_debug_file);
5944 | fprintf(ssh_debug_file,"|\n");
5945 | #endif
5946 | }
5947 | }
5948 |
5949 | #endif /* SSH_DECRYPT_DEBUG }}} */
5950 |
5951 | static void
5952 | ssh_secrets_block_callback(const void *secrets, unsigned size)
5953 | {
5954 | ssh_keylog_process_lines((const uint8_t *)secrets, size);
5955 | }
5956 |
5957 | /* Functions for SSH random hashtables. {{{ */
5958 | static int
5959 | ssh_equal (const void *v, const void *v2)
5960 | {
5961 | if (v == NULL((void*)0) || v2 == NULL((void*)0)) {
5962 | return 0;
5963 | }
5964 |
5965 | const ssh_bignum *val1;
5966 | const ssh_bignum *val2;
5967 | val1 = (const ssh_bignum *)v;
5968 | val2 = (const ssh_bignum *)v2;
5969 |
5970 | if (val1->length == val2->length &&
5971 | !memcmp(val1->data, val2->data, val2->length)) {
5972 | return 1;
5973 | }
5974 | return 0;
5975 | }
5976 |
5977 | static unsigned
5978 | ssh_hash (const void *v)
5979 | {
5980 | unsigned l,hash;
5981 | const ssh_bignum* id;
5982 | const unsigned* cur;
5983 |
5984 | if (v == NULL((void*)0)) {
5985 | return 0;
5986 | }
5987 |
5988 | hash = 0;
5989 | id = (const ssh_bignum*) v;
5990 |
5991 | /* id and id->data are mallocated in ssh_save_master_key(). As such 'data'
5992 | * should be aligned for any kind of access (for example as a unsigned as
5993 | * is done below). The intermediate void* cast is to prevent "cast
5994 | * increases required alignment of target type" warnings on CPUs (such
5995 | * as SPARCs) that do not allow misaligned memory accesses.
5996 | */
5997 | cur = (const unsigned*)(void*) id->data;
5998 |
5999 | for (l=4; (l < id->length); l+=4, cur++)
6000 | hash = hash ^ (*cur);
6001 |
6002 | return hash;
6003 | }
6004 |
6005 | static void
6006 | ssh_free_glib_allocated_bignum(void *data)
6007 | {
6008 | ssh_bignum * bignum;
6009 | if (data == NULL((void*)0)) {
6010 | return;
6011 | }
6012 |
6013 | bignum = (ssh_bignum *) data;
6014 | g_free(bignum->data);
6015 | g_free(bignum);
6016 | }
6017 |
6018 | static void
6019 | ssh_free_glib_allocated_entry(void *data)
6020 | {
6021 | ssh_key_map_entry_t * entry;
6022 | if (data == NULL((void*)0)) {
6023 | return;
6024 | }
6025 |
6026 | entry = (ssh_key_map_entry_t *) data;
6027 | g_free(entry->type);
6028 | ssh_free_glib_allocated_bignum(entry->key_material);
6029 | g_free(entry);
6030 | }
6031 | /* Functions for SSH random hashtables. }}} */
6032 |
6033 | static void
6034 | ssh_shutdown(void) {
6035 | g_hash_table_destroy(ssh_master_key_map);
6036 | }
6037 |
6038 | void
6039 | proto_register_ssh(void)
6040 | {
6041 | static hf_register_info hf[] = {
6042 | { &hf_ssh_protocol,
6043 | { "Protocol", "ssh.protocol",
6044 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6045 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6046 |
6047 | { &hf_ssh_packet_length,
6048 | { "Packet Length", "ssh.packet_length",
6049 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6050 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6051 |
6052 | { &hf_ssh_packet_length_encrypted,
6053 | { "Packet Length (encrypted)", "ssh.packet_length_encrypted",
6054 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6055 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6056 |
6057 | { &hf_ssh_padding_length,
6058 | { "Padding Length", "ssh.padding_length",
6059 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6060 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6061 |
6062 | { &hf_ssh_payload,
6063 | { "Payload", "ssh.payload",
6064 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6065 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6066 |
6067 | { &hf_ssh_encrypted_packet,
6068 | { "Encrypted Packet", "ssh.encrypted_packet",
6069 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6070 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6071 |
6072 | { &hf_ssh_padding_string,
6073 | { "Padding String", "ssh.padding_string",
6074 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6075 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6076 |
6077 | { &hf_ssh_seq_num,
6078 | { "Sequence number", "ssh.seq_num",
6079 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6080 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6081 |
6082 | { &hf_ssh_mac_string,
6083 | { "MAC", "ssh.mac",
6084 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6085 | "Message authentication code", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6086 |
6087 | { &hf_ssh_mac_status,
6088 | { "MAC Status", "ssh.mac.status", FT_UINT8, BASE_NONE, VALS(proto_checksum_vals)((0 ? (const struct _value_string*)0 : ((proto_checksum_vals) ))), 0x0,
6089 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6090 |
6091 | { &hf_ssh_direction,
6092 | { "Direction", "ssh.direction",
6093 | FT_BOOLEAN, BASE_NONE, TFS(&tfs_s2c_c2s)((0 ? (const struct true_false_string*)0 : ((&tfs_s2c_c2s )))), 0x0,
6094 | "Message direction", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6095 |
6096 | { &hf_ssh_msg_code,
6097 | { "Message Code", "ssh.message_code",
6098 | FT_UINT8, BASE_DEC, VALS(ssh1_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh1_msg_vals)))), 0x0,
6099 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6100 |
6101 | { &hf_ssh2_msg_code,
6102 | { "Message Code", "ssh.message_code",
6103 | FT_UINT8, BASE_DEC, VALS(ssh2_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_msg_vals)))), 0x0,
6104 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6105 |
6106 | { &hf_ssh2_kex_dh_msg_code,
6107 | { "Message Code", "ssh.message_code",
6108 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_dh_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_dh_msg_vals )))), 0x0,
6109 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6110 |
6111 | { &hf_ssh2_kex_dh_gex_msg_code,
6112 | { "Message Code", "ssh.message_code",
6113 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_dh_gex_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_dh_gex_msg_vals )))), 0x0,
6114 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6115 |
6116 | { &hf_ssh2_kex_ecdh_msg_code,
6117 | { "Message Code", "ssh.message_code",
6118 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_ecdh_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_ecdh_msg_vals )))), 0x0,
6119 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6120 |
6121 | { &hf_ssh2_kex_hybrid_msg_code,
6122 | { "Message Code", "ssh.message_code",
6123 | FT_UINT8, BASE_DEC, VALS(ssh2_kex_hybrid_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_hybrid_msg_vals )))), 0x0,
6124 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6125 |
6126 | { &hf_ssh2_ext_ping_msg_code,
6127 | { "Message Code", "ssh.message_code",
6128 | FT_UINT8, BASE_DEC, VALS(ssh2_ext_ping_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_ext_ping_msg_vals )))), 0x0,
6129 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6130 |
6131 | { &hf_ssh_cookie,
6132 | { "Cookie", "ssh.cookie",
6133 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6134 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6135 |
6136 | { &hf_ssh_kex_algorithms,
6137 | { "kex_algorithms string", "ssh.kex_algorithms",
6138 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6139 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6140 |
6141 | { &hf_ssh_server_host_key_algorithms,
6142 | { "server_host_key_algorithms string", "ssh.server_host_key_algorithms",
6143 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6144 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6145 |
6146 | { &hf_ssh_encryption_algorithms_client_to_server,
6147 | { "encryption_algorithms_client_to_server string", "ssh.encryption_algorithms_client_to_server",
6148 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6149 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6150 |
6151 | { &hf_ssh_encryption_algorithms_server_to_client,
6152 | { "encryption_algorithms_server_to_client string", "ssh.encryption_algorithms_server_to_client",
6153 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6154 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6155 |
6156 | { &hf_ssh_mac_algorithms_client_to_server,
6157 | { "mac_algorithms_client_to_server string", "ssh.mac_algorithms_client_to_server",
6158 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6159 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6160 |
6161 | { &hf_ssh_mac_algorithms_server_to_client,
6162 | { "mac_algorithms_server_to_client string", "ssh.mac_algorithms_server_to_client",
6163 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6164 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6165 |
6166 | { &hf_ssh_compression_algorithms_client_to_server,
6167 | { "compression_algorithms_client_to_server string", "ssh.compression_algorithms_client_to_server",
6168 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6169 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6170 |
6171 | { &hf_ssh_compression_algorithms_server_to_client,
6172 | { "compression_algorithms_server_to_client string", "ssh.compression_algorithms_server_to_client",
6173 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6174 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6175 |
6176 | { &hf_ssh_languages_client_to_server,
6177 | { "languages_client_to_server string", "ssh.languages_client_to_server",
6178 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6179 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6180 |
6181 | { &hf_ssh_languages_server_to_client,
6182 | { "languages_server_to_client string", "ssh.languages_server_to_client",
6183 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6184 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6185 |
6186 | { &hf_ssh_kex_algorithms_length,
6187 | { "kex_algorithms length", "ssh.kex_algorithms_length",
6188 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6189 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6190 |
6191 | { &hf_ssh_server_host_key_algorithms_length,
6192 | { "server_host_key_algorithms length", "ssh.server_host_key_algorithms_length",
6193 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6194 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6195 |
6196 | { &hf_ssh_encryption_algorithms_client_to_server_length,
6197 | { "encryption_algorithms_client_to_server length", "ssh.encryption_algorithms_client_to_server_length",
6198 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6199 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6200 |
6201 | { &hf_ssh_encryption_algorithms_server_to_client_length,
6202 | { "encryption_algorithms_server_to_client length", "ssh.encryption_algorithms_server_to_client_length",
6203 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6204 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6205 |
6206 | { &hf_ssh_mac_algorithms_client_to_server_length,
6207 | { "mac_algorithms_client_to_server length", "ssh.mac_algorithms_client_to_server_length",
6208 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6209 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6210 |
6211 | { &hf_ssh_mac_algorithms_server_to_client_length,
6212 | { "mac_algorithms_server_to_client length", "ssh.mac_algorithms_server_to_client_length",
6213 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6214 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6215 |
6216 | { &hf_ssh_compression_algorithms_client_to_server_length,
6217 | { "compression_algorithms_client_to_server length", "ssh.compression_algorithms_client_to_server_length",
6218 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6219 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6220 |
6221 | { &hf_ssh_compression_algorithms_server_to_client_length,
6222 | { "compression_algorithms_server_to_client length", "ssh.compression_algorithms_server_to_client_length",
6223 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6224 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6225 |
6226 | { &hf_ssh_languages_client_to_server_length,
6227 | { "languages_client_to_server length", "ssh.languages_client_to_server_length",
6228 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6229 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6230 |
6231 | { &hf_ssh_languages_server_to_client_length,
6232 | { "languages_server_to_client length", "ssh.languages_server_to_client_length",
6233 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6234 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6235 |
6236 | { &hf_ssh_first_kex_packet_follows,
6237 | { "First KEX Packet Follows", "ssh.first_kex_packet_follows",
6238 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6239 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6240 |
6241 | { &hf_ssh_kex_reserved,
6242 | { "Reserved", "ssh.kex.reserved",
6243 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6244 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6245 |
6246 | { &hf_ssh_kex_hassh_algo,
6247 | { "hasshAlgorithms", "ssh.kex.hassh_algorithms",
6248 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6249 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6250 |
6251 | { &hf_ssh_kex_hassh,
6252 | { "hassh", "ssh.kex.hassh",
6253 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6254 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6255 |
6256 | { &hf_ssh_kex_hasshserver_algo,
6257 | { "hasshServerAlgorithms", "ssh.kex.hasshserver_algorithms",
6258 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6259 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6260 |
6261 | { &hf_ssh_kex_hasshserver,
6262 | { "hasshServer", "ssh.kex.hasshserver",
6263 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6264 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6265 |
6266 | { &hf_ssh_hostkey_length,
6267 | { "Host key length", "ssh.host_key.length",
6268 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6269 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6270 |
6271 | { &hf_ssh_hostkey_type_length,
6272 | { "Host key type length", "ssh.host_key.type_length",
6273 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6274 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6275 |
6276 | { &hf_ssh_hostkey_type,
6277 | { "Host key type", "ssh.host_key.type",
6278 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6279 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6280 |
6281 | { &hf_ssh_hostkey_data,
6282 | { "Host key data", "ssh.host_key.data",
6283 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6284 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6285 |
6286 | { &hf_ssh_hostkey_rsa_n,
6287 | { "RSA modulus (N)", "ssh.host_key.rsa.n",
6288 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6289 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6290 |
6291 | { &hf_ssh_hostkey_rsa_e,
6292 | { "RSA public exponent (e)", "ssh.host_key.rsa.e",
6293 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6294 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6295 |
6296 | { &hf_ssh_hostkey_dsa_p,
6297 | { "DSA prime modulus (p)", "ssh.host_key.dsa.p",
6298 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6299 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6300 |
6301 | { &hf_ssh_hostkey_dsa_q,
6302 | { "DSA prime divisor (q)", "ssh.host_key.dsa.q",
6303 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6304 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6305 |
6306 | { &hf_ssh_hostkey_dsa_g,
6307 | { "DSA subgroup generator (g)", "ssh.host_key.dsa.g",
6308 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6309 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6310 |
6311 | { &hf_ssh_hostkey_dsa_y,
6312 | { "DSA public key (y)", "ssh.host_key.dsa.y",
6313 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6314 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6315 |
6316 | { &hf_ssh_hostkey_ecdsa_curve_id,
6317 | { "ECDSA elliptic curve identifier", "ssh.host_key.ecdsa.id",
6318 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6319 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6320 |
6321 | { &hf_ssh_hostkey_ecdsa_curve_id_length,
6322 | { "ECDSA elliptic curve identifier length", "ssh.host_key.ecdsa.id_length",
6323 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6324 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6325 |
6326 | { &hf_ssh_hostkey_ecdsa_q,
6327 | { "ECDSA public key (Q)", "ssh.host_key.ecdsa.q",
6328 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6329 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6330 |
6331 | { &hf_ssh_hostkey_ecdsa_q_length,
6332 | { "ECDSA public key length", "ssh.host_key.ecdsa.q_length",
6333 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6334 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6335 |
6336 | { &hf_ssh_hostkey_eddsa_key,
6337 | { "EdDSA public key", "ssh.host_key.eddsa.key",
6338 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6339 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6340 |
6341 | { &hf_ssh_hostkey_eddsa_key_length,
6342 | { "EdDSA public key length", "ssh.host_key.eddsa.key_length",
6343 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6344 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6345 |
6346 | { &hf_ssh_hostsig_length,
6347 | { "Host signature length", "ssh.host_sig.length",
6348 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6349 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6350 |
6351 | { &hf_ssh_hostsig_type_length,
6352 | { "Host signature type length", "ssh.host_sig.type_length",
6353 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6354 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6355 |
6356 | { &hf_ssh_hostsig_type,
6357 | { "Host signature type", "ssh.host_sig.type",
6358 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6359 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6360 |
6361 | { &hf_ssh_hostsig_data,
6362 | { "Host signature data", "ssh.host_sig.data",
6363 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6364 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6365 |
6366 | { &hf_ssh_hostsig_rsa,
6367 | { "RSA signature", "ssh.host_sig.rsa",
6368 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6369 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6370 |
6371 | { &hf_ssh_hostsig_dsa,
6372 | { "DSA signature", "ssh.host_sig.dsa",
6373 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6374 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6375 |
6376 | { &hf_ssh_dh_e,
6377 | { "DH client e", "ssh.dh.e",
6378 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6379 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6380 |
6381 | { &hf_ssh_dh_f,
6382 | { "DH server f", "ssh.dh.f",
6383 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6384 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6385 |
6386 | { &hf_ssh_dh_gex_min,
6387 | { "DH GEX Min", "ssh.dh_gex.min",
6388 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6389 | "Minimal acceptable group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6390 |
6391 | { &hf_ssh_dh_gex_nbits,
6392 | { "DH GEX Number of Bits", "ssh.dh_gex.nbits",
6393 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6394 | "Preferred group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6395 |
6396 | { &hf_ssh_dh_gex_max,
6397 | { "DH GEX Max", "ssh.dh_gex.max",
6398 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6399 | "Maximal acceptable group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6400 |
6401 | { &hf_ssh_dh_gex_p,
6402 | { "DH GEX modulus (P)", "ssh.dh_gex.p",
6403 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6404 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6405 |
6406 | { &hf_ssh_dh_gex_g,
6407 | { "DH GEX base (G)", "ssh.dh_gex.g",
6408 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6409 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6410 |
6411 | { &hf_ssh_ecdh_q_c,
6412 | { "ECDH client's ephemeral public key (Q_C)", "ssh.ecdh.q_c",
6413 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6414 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6415 |
6416 | { &hf_ssh_ecdh_q_c_length,
6417 | { "ECDH client's ephemeral public key length", "ssh.ecdh.q_c_length",
6418 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6419 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6420 |
6421 | { &hf_ssh_ecdh_q_s,
6422 | { "ECDH server's ephemeral public key (Q_S)", "ssh.ecdh.q_s",
6423 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6424 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6425 |
6426 | { &hf_ssh_ecdh_q_s_length,
6427 | { "ECDH server's ephemeral public key length", "ssh.ecdh.q_s_length",
6428 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6429 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6430 |
6431 | { &hf_ssh_mpint_length,
6432 | { "Multi Precision Integer Length", "ssh.mpint_length",
6433 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6434 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6435 |
6436 | { &hf_ssh_ignore_data_length,
6437 | { "Debug message length", "ssh.ignore_data_length",
6438 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6439 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6440 |
6441 | { &hf_ssh_ignore_data,
6442 | { "Ignore data", "ssh.ignore_data",
6443 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6444 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6445 |
6446 | { &hf_ssh_debug_always_display,
6447 | { "Always Display", "ssh.debug_always_display",
6448 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6449 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6450 |
6451 | { &hf_ssh_debug_message_length,
6452 | { "Debug message length", "ssh.debug_name_length",
6453 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6454 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6455 |
6456 | { &hf_ssh_debug_message,
6457 | { "Debug message", "ssh.debug_name",
6458 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6459 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6460 |
6461 | { &hf_ssh_service_name_length,
6462 | { "Service Name length", "ssh.service_name_length",
6463 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6464 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6465 |
6466 | { &hf_ssh_service_name,
6467 | { "Service Name", "ssh.service_name",
6468 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6469 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6470 |
6471 | { &hf_ssh_disconnect_reason,
6472 | { "Disconnect reason", "ssh.disconnect_reason",
6473 | FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
6474 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6475 |
6476 | { &hf_ssh_disconnect_description_length,
6477 | { "Disconnect description length", "ssh.disconnect_description_length",
6478 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6479 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6480 |
6481 | { &hf_ssh_disconnect_description,
6482 | { "Disconnect description", "ssh.disconnect_description",
6483 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6484 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6485 |
6486 | { &hf_ssh_ext_count,
6487 | { "Extension count", "ssh.extension.count",
6488 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6489 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6490 |
6491 | { &hf_ssh_ext_name_length,
6492 | { "Extension name length", "ssh.extension.name_length",
6493 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6494 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6495 |
6496 | { &hf_ssh_ext_name,
6497 | { "Extension name", "ssh.extension.name",
6498 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6499 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6500 |
6501 | { &hf_ssh_ext_value_length,
6502 | { "Extension value length", "ssh.extension.value_length",
6503 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6504 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6505 |
6506 | { &hf_ssh_ext_value,
6507 | { "Extension value", "ssh.extension.value",
6508 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6509 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6510 |
6511 | { &hf_ssh_ext_server_sig_algs_algorithms,
6512 | { "Accepted signature algorithms", "ssh.extension.server_sig_algs.algorithms",
6513 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6514 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6515 |
6516 | { &hf_ssh_ext_delay_compression_algorithms_client_to_server_length,
6517 | { "Compression algorithms (client to server) length", "ssh.extension.delay_compression.compression_algorithms_client_to_server_length",
6518 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6519 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6520 |
6521 | { &hf_ssh_ext_delay_compression_algorithms_client_to_server,
6522 | { "Compression algorithms (client to server)", "ssh.extension.delay_compression.compression_algorithms_client_to_server",
6523 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6524 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6525 |
6526 | { &hf_ssh_ext_delay_compression_algorithms_server_to_client_length,
6527 | { "Compression algorithms (server to client) length", "ssh.extension.delay_compression.compression_algorithms_server_to_client_length",
6528 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6529 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6530 |
6531 | { &hf_ssh_ext_delay_compression_algorithms_server_to_client,
6532 | { "Compression algorithms (server to client)", "ssh.extension.delay_compression.compression_algorithms_server_to_client",
6533 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6534 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6535 |
6536 | { &hf_ssh_ext_no_flow_control_value,
6537 | { "No flow control flag", "ssh.extension.no_flow_control.value",
6538 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6539 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6540 |
6541 | { &hf_ssh_ext_elevation_value,
6542 | { "Elevation flag", "ssh.extension.elevation.value",
6543 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6544 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6545 |
6546 | { &hf_ssh_ext_prop_publickey_algorithms_algorithms,
6547 | { "Public key algorithms", "ssh.extension.prop_publickey_algorithms.algorithms",
6548 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6549 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6550 |
6551 | { &hf_ssh_lang_tag_length,
6552 | { "Language tag length", "ssh.lang_tag_length",
6553 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6554 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6555 |
6556 | { &hf_ssh_lang_tag,
6557 | { "Language tag", "ssh.lang_tag",
6558 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6559 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6560 |
6561 | { &hf_ssh_ping_data_length,
6562 | { "Data length", "ssh.ping_data_length",
6563 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6564 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6565 |
6566 | { &hf_ssh_ping_data,
6567 | { "Data", "ssh.ping_data",
6568 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6569 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6570 |
6571 | { &hf_ssh_pong_data_length,
6572 | { "Data length", "ssh.pong_data_length",
6573 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6574 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6575 |
6576 | { &hf_ssh_pong_data,
6577 | { "Data", "ssh.pong_data",
6578 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6579 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6580 |
6581 |
6582 | { &hf_ssh_userauth_user_name_length,
6583 | { "User Name length", "ssh.userauth_user_name_length",
6584 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6585 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6586 |
6587 | { &hf_ssh_userauth_user_name,
6588 | { "User Name", "ssh.userauth_user_name",
6589 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6590 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6591 |
6592 | { &hf_ssh_userauth_change_password,
6593 | { "Change password", "ssh.userauth.change_password",
6594 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6595 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6596 |
6597 | { &hf_ssh_userauth_service_name_length,
6598 | { "Service Name length", "ssh.userauth_service_name_length",
6599 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6600 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6601 |
6602 | { &hf_ssh_userauth_service_name,
6603 | { "Service Name", "ssh.userauth_service_name",
6604 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6605 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6606 |
6607 | { &hf_ssh_userauth_method_name_length,
6608 | { "Method Name length", "ssh.userauth_method_name_length",
6609 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6610 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6611 |
6612 | { &hf_ssh_userauth_method_name,
6613 | { "Method Name", "ssh.userauth_method_name",
6614 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6615 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6616 |
6617 | { &hf_ssh_userauth_have_signature,
6618 | { "Have signature", "ssh.userauth.have_signature",
6619 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6620 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6621 |
6622 | { &hf_ssh_userauth_password_length,
6623 | { "Password length", "ssh.userauth_password_length",
6624 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6625 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6626 |
6627 | { &hf_ssh_userauth_password,
6628 | { "Password", "ssh.userauth_password",
6629 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6630 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6631 |
6632 | { &hf_ssh_userauth_new_password_length,
6633 | { "New password length", "ssh.userauth_new_password_length",
6634 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6635 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6636 |
6637 | { &hf_ssh_userauth_new_password,
6638 | { "New password", "ssh.userauth_new_password",
6639 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6640 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6641 |
6642 | { &hf_ssh_auth_failure_list_length,
6643 | { "Authentications that can continue list len", "ssh.auth_failure_cont_list_length",
6644 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6645 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6646 |
6647 | { &hf_ssh_auth_failure_list,
6648 | { "Authentications that can continue list", "ssh.auth_failure_cont_list",
6649 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6650 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6651 |
6652 | { &hf_ssh_userauth_partial_success,
6653 | { "Partial success", "ssh.userauth.partial_success",
6654 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6655 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6656 |
6657 | { &hf_ssh_userauth_pka_name_len,
6658 | { "Public key algorithm name length", "ssh.userauth_pka_name_length",
6659 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6660 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6661 |
6662 | { &hf_ssh_userauth_pka_name,
6663 | { "Public key algorithm name", "ssh.userauth_pka_name",
6664 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6665 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6666 |
6667 | { &hf_ssh_pk_blob_name_length,
6668 | { "Public key blob algorithm name length", "ssh.pk_blob_name_length",
6669 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6670 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6671 |
6672 | { &hf_ssh_pk_blob_name,
6673 | { "Public key blob algorithm name", "ssh.pk_blob_name",
6674 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6675 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6676 |
6677 | { &hf_ssh_blob_length,
6678 | { "Public key blob length", "ssh.pk_blob_length",
6679 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6680 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6681 |
6682 | { &hf_ssh_blob,
6683 | { "Public key blob", "ssh.pk_blob",
6684 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6685 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6686 |
6687 | { &hf_ssh_blob_e,
6688 | { "ssh-rsa public exponent (e)", "ssh.pk_blob.ssh-rsa.e",
6689 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6690 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6691 |
6692 | { &hf_ssh_blob_n,
6693 | { "ssh-rsa modulus (n)", "ssh.pk_blob.ssh-rsa.n",
6694 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6695 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6696 |
6697 | { &hf_ssh_blob_dsa_p,
6698 | { "DSA prime modulus (p)", "ssh.pk_blob.dsa.p",
6699 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6700 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6701 |
6702 | { &hf_ssh_blob_dsa_q,
6703 | { "DSA prime divisor (q)", "ssh.pk_blob.dsa.q",
6704 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6705 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6706 |
6707 | { &hf_ssh_blob_dsa_g,
6708 | { "DSA subgroup generator (g)", "ssh.pk_blob.dsa.g",
6709 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6710 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6711 |
6712 | { &hf_ssh_blob_dsa_y,
6713 | { "DSA public key (y)", "ssh.pk_blob.dsa.y",
6714 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6715 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6716 |
6717 | { &hf_ssh_blob_ecdsa_curve_id,
6718 | { "ECDSA elliptic curve identifier", "ssh.pk_blob.ecdsa.id",
6719 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6720 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6721 |
6722 | { &hf_ssh_blob_ecdsa_curve_id_length,
6723 | { "ECDSA elliptic curve identifier length", "ssh.pk_blob.ecdsa.id_length",
6724 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6725 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6726 |
6727 | { &hf_ssh_blob_ecdsa_q,
6728 | { "ECDSA public key (Q)", "ssh.pk_blob.ecdsa.q",
6729 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6730 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6731 |
6732 | { &hf_ssh_blob_ecdsa_q_length,
6733 | { "ECDSA public key length", "ssh.pk_blob.ecdsa.q_length",
6734 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6735 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6736 |
6737 | { &hf_ssh_blob_eddsa_key,
6738 | { "EdDSA public key", "ssh.pk_blob.eddsa.key",
6739 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6740 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6741 |
6742 | { &hf_ssh_blob_eddsa_key_length,
6743 | { "EdDSA public key length", "ssh.pk_blob.eddsa.key_length",
6744 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6745 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6746 |
6747 | { &hf_ssh_blob_data,
6748 | { "Public key blob data", "ssh.pk_blob.data",
6749 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6750 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6751 |
6752 | { &hf_ssh_signature_length,
6753 | { "Public key signature blob length", "ssh.pk_sig_blob_length",
6754 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6755 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6756 |
6757 | { &hf_ssh_pk_sig_blob_name_length,
6758 | { "Public key signature blob algorithm name length", "ssh.pk_sig_blob_name_length",
6759 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6760 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6761 |
6762 | { &hf_ssh_pk_sig_blob_name,
6763 | { "Public key signature blob algorithm name", "ssh.pk_sig_blob_name",
6764 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6765 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6766 |
6767 | { &hf_ssh_pk_sig_s_length,
6768 | { "ssh-rsa signature length", "ssh.sig.ssh-rsa.length",
6769 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6770 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6771 |
6772 | { &hf_ssh_pk_sig_s,
6773 | { "ssh-rsa signature (s)", "ssh.sig.ssh-rsa.s",
6774 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6775 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6776 |
6777 | { &hf_ssh_connection_type_name_len,
6778 | { "Channel type name length", "ssh.connection_type_name_length",
6779 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6780 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6781 |
6782 | { &hf_ssh_connection_type_name,
6783 | { "Channel type name", "ssh.connection_type_name",
6784 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6785 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6786 |
6787 | { &hf_ssh_connection_sender_channel,
6788 | { "Sender channel", "ssh.connection_sender_channel",
6789 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6790 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6791 |
6792 | { &hf_ssh_connection_recipient_channel,
6793 | { "Recipient channel", "ssh.connection_recipient_channel",
6794 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6795 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6796 |
6797 | { &hf_ssh_connection_initial_window,
6798 | { "Initial window size", "ssh.connection_initial_window_size",
6799 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6800 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6801 |
6802 | { &hf_ssh_connection_maximum_packet_size,
6803 | { "Maximum packet size", "ssh.userauth_maximum_packet_size",
6804 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6805 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6806 |
6807 | { &hf_ssh_global_request_name_len,
6808 | { "Global request name length", "ssh.global_request_name_length",
6809 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6810 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6811 |
6812 | { &hf_ssh_global_request_name,
6813 | { "Global request name", "ssh.global_request_name",
6814 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6815 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6816 |
6817 | { &hf_ssh_global_request_want_reply,
6818 | { "Global request want reply", "ssh.global_request_want_reply",
6819 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6820 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6821 |
6822 | { &hf_ssh_global_request_hostkeys_array_len,
6823 | { "Host keys array length", "ssh.global_request_hostkeys",
6824 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6825 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6826 |
6827 | { &hf_ssh_channel_request_name_len,
6828 | { "Channel request name length", "ssh.channel_request_name_length",
6829 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6830 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6831 |
6832 | { &hf_ssh_channel_request_name,
6833 | { "Channel request name", "ssh.channel_request_name",
6834 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6835 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6836 |
6837 | { &hf_ssh_channel_request_want_reply,
6838 | { "Channel request want reply", "ssh.channel_request_want_reply",
6839 | FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6840 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6841 |
6842 | { &hf_ssh_subsystem_name_len,
6843 | { "Subsystem name length", "ssh.subsystem_name_length",
6844 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6845 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6846 |
6847 | { &hf_ssh_subsystem_name,
6848 | { "Subsystem name", "ssh.subsystem_name",
6849 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6850 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6851 |
6852 | { &hf_ssh_exec_cmd,
6853 | { "Command", "ssh.exec_command",
6854 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6855 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6856 |
6857 | { &hf_ssh_env_name,
6858 | { "Variable name", "ssh.env_name",
6859 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6860 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6861 |
6862 | { &hf_ssh_env_value,
6863 | { "Variable value", "ssh.env_value",
6864 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6865 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6866 |
6867 | { &hf_ssh_pty_term,
6868 | { "TERM environment variable", "ssh.pty_term",
6869 | FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6870 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6871 |
6872 | { &hf_ssh_pty_term_width_char,
6873 | { "Terminal width, characters", "ssh.pty_term_width_char",
6874 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6875 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6876 |
6877 | { &hf_ssh_pty_term_height_row,
6878 | { "Terminal height, rows", "ssh.pty_term_height_row",
6879 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6880 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6881 |
6882 | { &hf_ssh_pty_term_width_pixel,
6883 | { "Terminal width, pixels", "ssh.pty_term_width_pixel",
6884 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6885 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6886 |
6887 | { &hf_ssh_pty_term_height_pixel,
6888 | { "Terminal height, pixels", "ssh.pty_term_height_pixel",
6889 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6890 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6891 |
6892 | { &hf_ssh_pty_term_modes_len,
6893 | { "Encoded Terminal Modes Length", "ssh.pty_term_modes_length",
6894 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6895 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6896 |
6897 | { &hf_ssh_pty_term_modes,
6898 | { "Encoded Terminal Modes", "ssh.pty_term_modes",
6899 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6900 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6901 |
6902 | { &hf_ssh_pty_term_mode,
6903 | { "Mode", "ssh.pty_term_mode",
6904 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6905 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6906 |
6907 | { &hf_ssh_pty_term_mode_opcode,
6908 | { "Opcode", "ssh.pty_term_mode.opcode",
6909 | FT_UINT8, BASE_DEC, VALS(ssh_tty_op_vals)((0 ? (const struct _value_string*)0 : ((ssh_tty_op_vals)))), 0x0,
6910 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6911 |
6912 | { &hf_ssh_pty_term_mode_vintr,
6913 | { "Interrupt character", "ssh.pty_term_mode.vintr",
6914 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6915 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6916 |
6917 | { &hf_ssh_pty_term_mode_vquit,
6918 | { "Quit character", "ssh.pty_term_mode.vquit",
6919 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6920 | "Sends SIGQUIT on POSIX systems", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6921 |
6922 | { &hf_ssh_pty_term_mode_verase,
6923 | { "Erase the character to the left of the cursor", "ssh.pty_term_mode.verase",
6924 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6925 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6926 |
6927 | { &hf_ssh_pty_term_mode_vkill,
6928 | { "Kill the current input line", "ssh.pty_term_mode.vkill",
6929 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6930 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6931 |
6932 | { &hf_ssh_pty_term_mode_veof,
6933 | { "End-of-file character", "ssh.pty_term_mode.veof",
6934 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6935 | "Sends EOF from the terminal", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6936 |
6937 | { &hf_ssh_pty_term_mode_veol,
6938 | { "End-of-line character", "ssh.pty_term_mode.veol",
6939 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6940 | "In additional to carriage return and/or line feed", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6941 |
6942 | { &hf_ssh_pty_term_mode_veol2,
6943 | { "Additional end-of-line character", "ssh.pty_term_mode.veol2",
6944 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6945 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6946 |
6947 | { &hf_ssh_pty_term_mode_vstart,
6948 | { "Continues paused output", "ssh.pty_term_mode.vstart",
6949 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6950 | "Normally Control-Q", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6951 |
6952 | { &hf_ssh_pty_term_mode_vstop,
6953 | { "Pauses output", "ssh.pty_term_mode.vstop",
6954 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6955 | "Normally Control-S", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6956 |
6957 | { &hf_ssh_pty_term_mode_vsusp,
6958 | { "Suspends the current program", "ssh.pty_term_mode.vsusp",
6959 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6960 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6961 |
6962 | { &hf_ssh_pty_term_mode_vdsusp,
6963 | { "Another suspend character", "ssh.pty_term_mode.vdsusp",
6964 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6965 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6966 |
6967 | { &hf_ssh_pty_term_mode_vreprint,
6968 | { "Reprints the current input line", "ssh.pty_term_mode.vreprint",
6969 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6970 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6971 |
6972 | { &hf_ssh_pty_term_mode_vwerase,
6973 | { "Erase a word to the left of the cursor", "ssh.pty_term_mode.vwerase",
6974 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6975 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6976 |
6977 | { &hf_ssh_pty_term_mode_vlnext,
6978 | { "Enter the next character typed literally", "ssh.pty_term_mode.vlnext",
6979 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6980 | "Even if a special character", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6981 |
6982 | { &hf_ssh_pty_term_mode_vflush,
6983 | { "Character to flush output", "ssh.pty_term_mode.vflush",
6984 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6985 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6986 |
6987 | { &hf_ssh_pty_term_mode_vswtch,
6988 | { "Switch to a different shell layer", "ssh.pty_term_mode.vswtch",
6989 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6990 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
6991 |
6992 | { &hf_ssh_pty_term_mode_vstatus,
6993 | { "Print system status line", "ssh.pty_term_mode.vstatus",
6994 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6995 | "Load, command, pid, etc.", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6996 |
6997 | { &hf_ssh_pty_term_mode_vdiscard,
6998 | { "Toggles the flushing of terminal output", "ssh.pty_term_mode.vdiscard",
6999 | FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7000 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7001 |
7002 | { &hf_ssh_pty_term_mode_ignpar,
7003 | { "Ignore parity flag", "ssh.pty_term_mode.ignpar",
7004 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7005 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7006 |
7007 | { &hf_ssh_pty_term_mode_parmrk,
7008 | { "Mark parity and framing errors", "ssh.pty_term_mode.parmrk",
7009 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7010 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7011 |
7012 | { &hf_ssh_pty_term_mode_inpck,
7013 | { "Enable checking of parity errors", "ssh.pty_term_mode.inpck",
7014 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7015 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7016 |
7017 | { &hf_ssh_pty_term_mode_istrip,
7018 | { "Strip 8th bit off characters", "ssh.pty_term_mode.istrip",
7019 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7020 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7021 |
7022 | { &hf_ssh_pty_term_mode_inlcr,
7023 | { "Map NL into CR on input", "ssh.pty_term_mode.inlcr",
7024 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7025 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7026 |
7027 | { &hf_ssh_pty_term_mode_igncr,
7028 | { "Ignore CR on input", "ssh.pty_term_mode.igncr",
7029 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7030 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7031 |
7032 | { &hf_ssh_pty_term_mode_icrnl,
7033 | { "Map CR to NL on input", "ssh.pty_term_mode.icrnl",
7034 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7035 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7036 |
7037 | { &hf_ssh_pty_term_mode_iuclc,
7038 | { "Translate uppercase characters to lowercase", "ssh.pty_term_mode.iuclc",
7039 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7040 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7041 |
7042 | { &hf_ssh_pty_term_mode_ixon,
7043 | { "Enable output flow control", "ssh.pty_term_mode.ixon",
7044 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7045 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7046 |
7047 | { &hf_ssh_pty_term_mode_ixany,
7048 | { "Any char will restart after stop", "ssh.pty_term_mode.ixany",
7049 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7050 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7051 |
7052 | { &hf_ssh_pty_term_mode_ixoff,
7053 | { "Enable input flow control", "ssh.pty_term_mode.ixoff",
7054 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7055 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7056 |
7057 | { &hf_ssh_pty_term_mode_imaxbel,
7058 | { "Ring bell on input queue full", "ssh.pty_term_mode.imaxbel",
7059 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7060 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7061 |
7062 | { &hf_ssh_pty_term_mode_iutf8,
7063 | { "Terminal input and output is assumed to be encoded in UTF-8", "ssh.pty_term_mode.iutf8",
7064 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7065 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7066 |
7067 | { &hf_ssh_pty_term_mode_isig,
7068 | { "Enable signals INTR, QUIT, [D]SUSP", "ssh.pty_term_mode.isig",
7069 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7070 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7071 |
7072 | { &hf_ssh_pty_term_mode_icanon,
7073 | { "Canonicalize input lines", "ssh.pty_term_mode.icanon",
7074 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7075 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7076 |
7077 | { &hf_ssh_pty_term_mode_xcase,
7078 | { "Enable input and output of uppercase characters by preceding their lowercase equivalents with '\'", "ssh.pty_term_mode.xcase",
7079 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7080 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7081 |
7082 | { &hf_ssh_pty_term_mode_echo,
7083 | { "Enable echoing", "ssh.pty_term_mode.echo",
7084 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7085 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7086 |
7087 | { &hf_ssh_pty_term_mode_echoe,
7088 | { "Visually erase chars", "ssh.pty_term_mode.echoe",
7089 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7090 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7091 |
7092 | { &hf_ssh_pty_term_mode_echok,
7093 | { "Kill character discards current line", "ssh.pty_term_mode.echok",
7094 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7095 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7096 |
7097 | { &hf_ssh_pty_term_mode_echonl,
7098 | { "Echo NL even if ECHO is off", "ssh.pty_term_mode.echonl",
7099 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7100 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7101 |
7102 | { &hf_ssh_pty_term_mode_noflsh,
7103 | { "No flush after interrupt", "ssh.pty_term_mode.noflsh",
7104 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7105 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7106 |
7107 | { &hf_ssh_pty_term_mode_tostop,
7108 | { "Stop background jobs from output", "ssh.pty_term_mode.tostop",
7109 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7110 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7111 |
7112 | { &hf_ssh_pty_term_mode_iexten,
7113 | { "Enable extensions", "ssh.pty_term_mode.iexten",
7114 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7115 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7116 |
7117 | { &hf_ssh_pty_term_mode_echoctl,
7118 | { "Echo control characters as ^(Char)", "ssh.pty_term_mode.echoctl",
7119 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7120 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7121 |
7122 | { &hf_ssh_pty_term_mode_echoke,
7123 | { "Visual erase for line kill", "ssh.pty_term_mode.echoke",
7124 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7125 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7126 |
7127 | { &hf_ssh_pty_term_mode_pendin,
7128 | { "Retype pending input", "ssh.pty_term_mode.pendin",
7129 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7130 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7131 |
7132 | { &hf_ssh_pty_term_mode_opost,
7133 | { "Enable output processing", "ssh.pty_term_mode.opost",
7134 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7135 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7136 |
7137 | { &hf_ssh_pty_term_mode_olcuc,
7138 | { "Convert lowercase to uppercase", "ssh.pty_term_mode.olcuc",
7139 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7140 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7141 |
7142 | { &hf_ssh_pty_term_mode_onlcr,
7143 | { "Map NL to CR-NL", "ssh.pty_term_mode.onlcr",
7144 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7145 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7146 |
7147 | { &hf_ssh_pty_term_mode_ocrnl,
7148 | { "Translate carriage return to newline (output)", "ssh.pty_term_mode.ocrnl",
7149 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7150 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7151 |
7152 | { &hf_ssh_pty_term_mode_onocr,
7153 | { "Translate newline to carriage-return newline (output)", "ssh.pty_term_mode.onocr",
7154 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7155 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7156 |
7157 | { &hf_ssh_pty_term_mode_onlret,
7158 | { "Newline performs a carriage return (output)", "ssh.pty_term_mode.onlret",
7159 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7160 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7161 |
7162 | { &hf_ssh_pty_term_mode_cs7,
7163 | { "7 bit mode", "ssh.pty_term_mode.cs7",
7164 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7165 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7166 |
7167 | { &hf_ssh_pty_term_mode_cs8,
7168 | { "8 bit mode", "ssh.pty_term_mode.cs8",
7169 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7170 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7171 |
7172 | { &hf_ssh_pty_term_mode_parenb,
7173 | { "Parity enable", "ssh.pty_term_mode.parenb",
7174 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7175 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7176 |
7177 | { &hf_ssh_pty_term_mode_parodd,
7178 | { "Odd parity", "ssh.pty_term_mode.parodd",
7179 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7180 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7181 |
7182 | { &hf_ssh_pty_term_mode_ispeed,
7183 | { "Input baud rate", "ssh.pty_term_mode.ispeed",
7184 | FT_UINT32, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_bit_sec)((0 ? (const struct unit_name_string*)0 : ((&units_bit_sec )))), 0x0,
7185 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7186 |
7187 | { &hf_ssh_pty_term_mode_ospeed,
7188 | { "Output baud rate", "ssh.pty_term_mode.ospeed",
7189 | FT_UINT32, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_bit_sec)((0 ? (const struct unit_name_string*)0 : ((&units_bit_sec )))), 0x0,
7190 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7191 |
7192 | { &hf_ssh_pty_term_mode_value,
7193 | { "Value", "ssh.pty_term_mode.value",
7194 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7195 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7196 |
7197 | { &hf_ssh_exit_status,
7198 | { "Exit status", "ssh.exit_status",
7199 | FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
7200 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7201 |
7202 | { &hf_ssh_channel_window_adjust,
7203 | { "Bytes to add", "ssh.channel_window_adjust",
7204 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7205 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7206 |
7207 | { &hf_ssh_channel_data_len,
7208 | { "Data length", "ssh.channel_data_length",
7209 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7210 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7211 |
7212 | { &hf_ssh_channel_data_type_code,
7213 | { "Data Type Code", "ssh.channel_data_type_code",
7214 | FT_UINT32, BASE_DEC, VALS(ssh_channel_data_type_code_vals)((0 ? (const struct _value_string*)0 : ((ssh_channel_data_type_code_vals )))), 0x0,
7215 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7216 |
7217 | { &hf_ssh_reassembled_in,
7218 | { "Reassembled PDU in frame", "ssh.reassembled_in",
7219 | FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7220 | "The PDU that doesn't end in this segment is reassembled in this frame", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7221 |
7222 | { &hf_ssh_reassembled_length,
7223 | { "Reassembled PDU length", "ssh.reassembled.length",
7224 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7225 | "The total length of the reassembled payload", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7226 |
7227 | { &hf_ssh_reassembled_data,
7228 | { "Reassembled PDU data", "ssh.reassembled.data",
7229 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
7230 | "The payload of multiple reassembled SSH segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7231 |
7232 | { &hf_ssh_segments,
7233 | { "Reassembled SSH segments", "ssh.segments",
7234 | FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
7235 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7236 |
7237 | { &hf_ssh_segment,
7238 | { "SSH segment", "ssh.segment",
7239 | FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7240 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7241 |
7242 | { &hf_ssh_segment_overlap,
7243 | { "Segment overlap", "ssh.segment.overlap",
7244 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7245 | "Segment overlaps with other segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7246 |
7247 | { &hf_ssh_segment_overlap_conflict,
7248 | { "Conflicting data in segment overlap", "ssh.segment.overlap.conflict",
7249 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7250 | "Overlapping segments contained conflicting data", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7251 |
7252 | { &hf_ssh_segment_multiple_tails,
7253 | { "Multiple tail segments found", "ssh.segment.multipletails",
7254 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7255 | "Several tails were found when reassembling the pdu", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7256 |
7257 | { &hf_ssh_segment_too_long_fragment,
7258 | { "Segment too long", "ssh.segment.toolongfragment",
7259 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7260 | "Segment contained data past end of the pdu", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7261 |
7262 | { &hf_ssh_segment_error,
7263 | { "Reassembling error", "ssh.segment.error",
7264 | FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7265 | "Reassembling error due to illegal segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7266 |
7267 | { &hf_ssh_segment_count,
7268 | { "Segment count", "ssh.segment.count",
7269 | FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7270 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7271 |
7272 | { &hf_ssh_segment_data,
7273 | { "SSH segment data", "ssh.segment.data",
7274 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
7275 | "The payload of a single SSH segment", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7276 |
7277 | { &hf_ssh_hybrid_blob_client,
7278 | { "Hybrid Key Exchange Blob Client", "ssh.kex_hybrid_blob_client",
7279 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, "Client post-quantum hybrid blob", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7280 | },
7281 |
7282 | { &hf_ssh_hybrid_blob_client_len,
7283 | { "Hybrid Key Exchange Blob Client Length", "ssh.kex_hybrid_blob_client_len",
7284 | 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) }
7285 | },
7286 |
7287 | { &hf_ssh_hybrid_blob_server,
7288 | { "Hybrid Key Exchange Blob Server", "ssh.kex_hybrid_blob_server",
7289 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, "Server post-quantum hybrid blob", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7290 | },
7291 |
7292 | { &hf_ssh_hybrid_blob_server_len,
7293 | { "Hybrid Key Exchange Blob Server Length", "ssh.kex_hybrid_blob_server_len",
7294 | 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) }
7295 | },
7296 |
7297 | { &hf_ssh_pq_kem_client,
7298 | { "Client PQ KEM Public Key", "ssh.kex.pq_kem_client",
7299 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
7300 | "Post-quantum key (client)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7301 | },
7302 |
7303 | { &hf_ssh_pq_kem_server,
7304 | { "Server PQ KEM Response", "ssh.kex.pq_kem_server",
7305 | FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
7306 | "Post-quantum ciphertext (server response)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7307 | },
7308 |
7309 | };
7310 |
7311 | static int *ett[] = {
7312 | &ett_ssh,
7313 | &ett_key_exchange,
7314 | &ett_key_exchange_host_key,
7315 | &ett_key_exchange_host_sig,
7316 | &ett_extension,
7317 | &ett_userauth_pk_blob,
7318 | &ett_userauth_pk_signature,
7319 | &ett_term_modes,
7320 | &ett_term_mode,
7321 | &ett_ssh1,
7322 | &ett_ssh2,
7323 | &ett_key_init,
7324 | &ett_ssh_segments,
7325 | &ett_ssh_pqhybrid_client, // added for PQ hybrid CLIENT dissection
7326 | &ett_ssh_pqhybrid_server, // added for PQ hybrid SERVER dissection
7327 | &ett_ssh_segment
7328 | };
7329 |
7330 | static ei_register_info ei[] = {
7331 | { &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)}} }},
7332 | { &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)}} }},
7333 | { &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)}} }},
7334 | { &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)}} }},
7335 | { &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)}} }},
7336 | { &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)}} }},
7337 | { &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)}} }},
7338 | { &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)}} }},
7339 |
7340 | };
7341 | module_t *ssh_module;
7342 | expert_module_t *expert_ssh;
7343 |
7344 | proto_ssh = proto_register_protocol("SSH Protocol", "SSH", "ssh");
7345 | proto_register_field_array(proto_ssh, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));
7346 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
7347 | expert_ssh = expert_register_protocol(proto_ssh);
7348 | expert_register_field_array(expert_ssh, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0]));
7349 |
7350 | #ifdef SSH_DECRYPT_DEBUG
7351 | ssh_module = prefs_register_protocol(proto_ssh, ssh_prefs_apply_cb);
7352 | #else
7353 | ssh_module = prefs_register_protocol(proto_ssh, NULL((void*)0));
7354 | #endif
7355 | prefs_register_bool_preference(ssh_module, "desegment_buffers",
7356 | "Reassemble SSH buffers spanning multiple TCP segments",
7357 | "Whether the SSH dissector should reassemble SSH buffers spanning multiple TCP segments. "
7358 | "To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
7359 | &ssh_desegment);
7360 | prefs_register_bool_preference(ssh_module, "ignore_ssh_mac_failed",
7361 | "Ignore Message Authentication Code (MAC) failure",
7362 | "For troubleshooting purposes, decrypt even if the "
7363 | "Message Authentication Code (MAC) check fails.",
7364 | &ssh_ignore_mac_failed);
7365 |
7366 | ssh_master_key_map = g_hash_table_new_full(ssh_hash, ssh_equal, ssh_free_glib_allocated_bignum, ssh_free_glib_allocated_entry);
7367 | prefs_register_filename_preference(ssh_module, "keylog_file", "Key log filename",
7368 | "The path to the file which contains a list of key exchange secrets in the following format:\n"
7369 | "\"<hex-encoded-cookie> <PRIVATE_KEY|SHARED_SECRET> <hex-encoded-key>\" (without quotes or leading spaces).\n",
7370 | &pref_keylog_file, false0);
7371 |
7372 | prefs_register_filename_preference(ssh_module, "debug_file", "SSH debug file",
7373 | "Redirect SSH debug to the file specified. Leave empty to disable debugging "
7374 | "or use \"" SSH_DEBUG_USE_STDERR"-" "\" to redirect output to stderr.",
7375 | &ssh_debug_file_name, true1);
7376 |
7377 | secrets_register_type(SECRETS_TYPE_SSH0x5353484b, ssh_secrets_block_callback);
7378 |
7379 | ssh_handle = register_dissector("ssh", dissect_ssh, proto_ssh);
7380 | reassembly_table_register(&ssh_reassembly_table, &tcp_reassembly_table_functions);
7381 | register_shutdown_routine(ssh_shutdown);
7382 | }
7383 |
7384 | void
7385 | proto_reg_handoff_ssh(void)
7386 | {
7387 | #ifdef SSH_DECRYPT_DEBUG
7388 | ssh_set_debug(ssh_debug_file_name);
7389 | #endif
7390 | dissector_add_uint_range_with_preference("tcp.port", TCP_RANGE_SSH"22", ssh_handle);
7391 | dissector_add_uint("sctp.port", SCTP_PORT_SSH22, ssh_handle);
7392 | dissector_add_uint("sctp.ppi", SSH_PAYLOAD_PROTOCOL_ID45, ssh_handle);
7393 | sftp_handle = find_dissector_add_dependency("sftp", proto_ssh);
7394 | data_text_lines_handle = find_dissector_add_dependency("data-text-lines", proto_ssh);
7395 |
7396 | heur_dissector_add("tcp", dissect_ssh_heur, "SSH over TCP", "ssh_tcp", proto_ssh, HEURISTIC_ENABLE);
7397 | }
7398 |
7399 | /*
7400 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
7401 | *
7402 | * Local variables:
7403 | * c-basic-offset: 4
7404 | * tab-width: 8
7405 | * indent-tabs-mode: nil
7406 | * End:
7407 | *
7408 | * vi: set shiftwidth=4 tabstop=8 expandtab:
7409 | * :indentSize=4:tabSize=8:noTabs=true:
7410 | */