Bug Summary

File:builds/wireshark/wireshark/epan/dissectors/packet-ssh.c
Warning:line 2711, 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-22/lib/clang/22 -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 CARES_NO_DEPRECATED -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-22/lib/clang/22/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/16/../../../../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=gnu17 -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 -fdwarf2-cfi-asm -o /builds/wireshark/wireshark/sbout/2026-08-03-100400-3661-1 -x c /builds/wireshark/wireshark/epan/dissectors/packet-ssh.c
1/* packet-ssh.c
2 * Routines for ssh packet dissection
3 *
4 * Huagang XIE <[email protected]>
5 * Kees Cook <[email protected]>
6 *
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <[email protected]>
9 * Copyright 1998 Gerald Combs
10 *
11 * Copied from packet-mysql.c
12 *
13 * SPDX-License-Identifier: GPL-2.0-or-later
14 *
15 *
16 * Note: support SSH v1 and v2 now.
17 *
18 */
19
20/* SSH version 2 is defined in:
21 *
22 * RFC 4250: The Secure Shell (SSH) Protocol Assigned Numbers
23 * RFC 4251: The Secure Shell (SSH) Protocol Architecture
24 * RFC 4252: The Secure Shell (SSH) Authentication Protocol
25 * RFC 4253: The Secure Shell (SSH) Transport Layer Protocol
26 * RFC 4254: The Secure Shell (SSH) Connection Protocol
27 *
28 * SSH versions under 2 were never officially standardized.
29 *
30 * Diffie-Hellman Group Exchange is defined in:
31 *
32 * RFC 4419: Diffie-Hellman Group Exchange for
33 * the Secure Shell (SSH) Transport Layer Protocol
34 */
35
36/* "SSH" prefixes are for version 2, whereas "SSH1" is for version 1 */
37
38#include "config.h"
39#define WS_LOG_DOMAIN"packet-ssh" "packet-ssh"
40/* Start with WIRESHARK_LOG_DOMAINS=packet-ssh and WIRESHARK_LOG_LEVEL=debug to see messages. */
41
42// Define this to get hex dumps more similar to what you get in openssh. If not defined, dumps look more like what you get with other dissectors.
43#define OPENSSH_STYLE
44
45#include <errno(*__errno_location ()).h>
46
47#include <epan/packet.h>
48#include <epan/exceptions.h>
49#include <epan/prefs.h>
50#include <epan/expert.h>
51#include <epan/proto_data.h>
52#include <epan/tfs.h>
53#include <epan/unit_strings.h>
54#include <wsutil/strtoi.h>
55#include <wsutil/to_str.h>
56#include <wsutil/file_util.h>
57#include <wsutil/filesystem.h>
58#include <wsutil/wsgcrypt.h>
59#include <wsutil/curve25519.h>
60#include <wsutil/pint.h>
61#include <wsutil/str_util.h>
62#include <wsutil/wslog.h>
63#include <epan/secrets.h>
64#include <wiretap/secrets-types.h>
65
66#if defined(HAVE_LIBGNUTLS1)
67#include <gnutls/abstract.h>
68#endif
69
70#include "packet-tcp.h"
71#include "packet-sctp.h"
72
73void proto_register_ssh(void);
74void 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
90typedef 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
117typedef 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
129typedef struct {
130 bool_Bool from_server;
131 ssh_message_info_t * messages;
132} ssh_packet_info_t;
133
134typedef 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
141struct 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
191struct 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
239typedef 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
244static GHashTable * ssh_master_key_map;
245
246static int proto_ssh;
247
248/* Version exchange */
249static int hf_ssh_protocol;
250
251/* Framing */
252static int hf_ssh_packet_length;
253static int hf_ssh_packet_length_encrypted;
254static int hf_ssh_padding_length;
255static int hf_ssh_payload;
256static int hf_ssh_encrypted_packet;
257static int hf_ssh_padding_string;
258static int hf_ssh_mac_string;
259static int hf_ssh_mac_status;
260static int hf_ssh_seq_num;
261static int hf_ssh_direction;
262
263/* Message codes */
264static int hf_ssh_msg_code;
265static int hf_ssh2_msg_code;
266static int hf_ssh2_kex_dh_msg_code;
267static int hf_ssh2_kex_dh_gex_msg_code;
268static int hf_ssh2_kex_ecdh_msg_code;
269static int hf_ssh2_kex_hybrid_msg_code;
270static int hf_ssh2_ext_ping_msg_code;
271
272/* Algorithm negotiation */
273static int hf_ssh_cookie;
274static int hf_ssh_kex_algorithms;
275static int hf_ssh_server_host_key_algorithms;
276static int hf_ssh_encryption_algorithms_client_to_server;
277static int hf_ssh_encryption_algorithms_server_to_client;
278static int hf_ssh_mac_algorithms_client_to_server;
279static int hf_ssh_mac_algorithms_server_to_client;
280static int hf_ssh_compression_algorithms_client_to_server;
281static int hf_ssh_compression_algorithms_server_to_client;
282static int hf_ssh_languages_client_to_server;
283static int hf_ssh_languages_server_to_client;
284static int hf_ssh_kex_algorithms_length;
285static int hf_ssh_server_host_key_algorithms_length;
286static int hf_ssh_encryption_algorithms_client_to_server_length;
287static int hf_ssh_encryption_algorithms_server_to_client_length;
288static int hf_ssh_mac_algorithms_client_to_server_length;
289static int hf_ssh_mac_algorithms_server_to_client_length;
290static int hf_ssh_compression_algorithms_client_to_server_length;
291static int hf_ssh_compression_algorithms_server_to_client_length;
292static int hf_ssh_languages_client_to_server_length;
293static int hf_ssh_languages_server_to_client_length;
294static int hf_ssh_first_kex_packet_follows;
295static int hf_ssh_kex_reserved;
296static int hf_ssh_kex_hassh_algo;
297static int hf_ssh_kex_hassh;
298static int hf_ssh_kex_hasshserver_algo;
299static int hf_ssh_kex_hasshserver;
300
301/* Key exchange common elements */
302static int hf_ssh_hostkey_length;
303static int hf_ssh_hostkey_type_length;
304static int hf_ssh_hostkey_type;
305static int hf_ssh_hostkey_data;
306static int hf_ssh_hostkey_rsa_n;
307static int hf_ssh_hostkey_rsa_e;
308static int hf_ssh_hostkey_dsa_p;
309static int hf_ssh_hostkey_dsa_q;
310static int hf_ssh_hostkey_dsa_g;
311static int hf_ssh_hostkey_dsa_y;
312static int hf_ssh_hostkey_ecdsa_curve_id;
313static int hf_ssh_hostkey_ecdsa_curve_id_length;
314static int hf_ssh_hostkey_ecdsa_q;
315static int hf_ssh_hostkey_ecdsa_q_length;
316static int hf_ssh_hostkey_eddsa_key;
317static int hf_ssh_hostkey_eddsa_key_length;
318static int hf_ssh_hostsig_length;
319static int hf_ssh_hostsig_type_length;
320static int hf_ssh_hostsig_type;
321static int hf_ssh_hostsig_rsa;
322static int hf_ssh_hostsig_dsa;
323static int hf_ssh_hostsig_data_length;
324static int hf_ssh_hostsig_data;
325
326/* Key exchange: Diffie-Hellman */
327static int hf_ssh_dh_e;
328static int hf_ssh_dh_f;
329
330/* Key exchange: Diffie-Hellman Group Exchange */
331static int hf_ssh_dh_gex_min;
332static int hf_ssh_dh_gex_nbits;
333static int hf_ssh_dh_gex_max;
334static int hf_ssh_dh_gex_p;
335static int hf_ssh_dh_gex_g;
336
337/* Key exchange: Elliptic Curve Diffie-Hellman */
338static int hf_ssh_ecdh_q_c;
339static int hf_ssh_ecdh_q_c_length;
340static int hf_ssh_ecdh_q_s;
341static int hf_ssh_ecdh_q_s_length;
342
343/* Key exchange: Post-Quantum Hybrid KEM */
344static int hf_ssh_hybrid_blob_client; // client's full PQ blob
345static int hf_ssh_hybrid_blob_client_len;
346static int hf_ssh_hybrid_blob_server; // server's full PQ blob
347static int hf_ssh_hybrid_blob_server_len;
348static int hf_ssh_pq_kem_client; // client's PQ public key
349static int hf_ssh_pq_kem_server; // server's PQ response
350
351/* Extension negotiation */
352static int hf_ssh_ext_count;
353static int hf_ssh_ext_name_length;
354static int hf_ssh_ext_name;
355static int hf_ssh_ext_value_length;
356static int hf_ssh_ext_value;
357static int hf_ssh_ext_server_sig_algs_algorithms;
358static int hf_ssh_ext_delay_compression_algorithms_client_to_server_length;
359static int hf_ssh_ext_delay_compression_algorithms_client_to_server;
360static int hf_ssh_ext_delay_compression_algorithms_server_to_client_length;
361static int hf_ssh_ext_delay_compression_algorithms_server_to_client;
362static int hf_ssh_ext_no_flow_control_value;
363static int hf_ssh_ext_elevation_value;
364static int hf_ssh_ext_prop_publickey_algorithms_algorithms;
365
366/* Miscellaneous */
367static int hf_ssh_mpint_length;
368
369static int hf_ssh_ignore_data_length;
370static int hf_ssh_ignore_data;
371static int hf_ssh_debug_always_display;
372static int hf_ssh_debug_message_length;
373static int hf_ssh_debug_message;
374static int hf_ssh_service_name_length;
375static int hf_ssh_service_name;
376static int hf_ssh_userauth_user_name_length;
377static int hf_ssh_userauth_user_name;
378static int hf_ssh_userauth_change_password;
379static int hf_ssh_userauth_service_name_length;
380static int hf_ssh_userauth_service_name;
381static int hf_ssh_userauth_method_name_length;
382static int hf_ssh_userauth_method_name;
383static int hf_ssh_userauth_have_signature;
384static int hf_ssh_userauth_password_length;
385static int hf_ssh_userauth_password;
386static int hf_ssh_userauth_new_password_length;
387static int hf_ssh_userauth_new_password;
388static int hf_ssh_auth_failure_list_length;
389static int hf_ssh_auth_failure_list;
390static int hf_ssh_userauth_partial_success;
391static int hf_ssh_userauth_pka_name_len;
392static int hf_ssh_userauth_pka_name;
393static int hf_ssh_pk_blob_name_length;
394static int hf_ssh_pk_blob_name;
395static int hf_ssh_blob_length;
396static int hf_ssh_signature_length;
397static int hf_ssh_pk_sig_blob_name_length;
398static int hf_ssh_pk_sig_blob_name;
399static int hf_ssh_connection_type_name_len;
400static int hf_ssh_connection_type_name;
401static int hf_ssh_connection_sender_channel;
402static int hf_ssh_connection_recipient_channel;
403static int hf_ssh_connection_initial_window;
404static int hf_ssh_connection_maximum_packet_size;
405static int hf_ssh_global_request_name_len;
406static int hf_ssh_global_request_name;
407static int hf_ssh_global_request_want_reply;
408static int hf_ssh_global_request_hostkeys_array_len;
409static int hf_ssh_channel_request_name_len;
410static int hf_ssh_channel_request_name;
411static int hf_ssh_channel_request_want_reply;
412static int hf_ssh_subsystem_name_len;
413static int hf_ssh_subsystem_name;
414static int hf_ssh_exec_cmd;
415static int hf_ssh_env_name;
416static int hf_ssh_env_value;
417static int hf_ssh_pty_term;
418static int hf_ssh_pty_term_width_char;
419static int hf_ssh_pty_term_height_row;
420static int hf_ssh_pty_term_width_pixel;
421static int hf_ssh_pty_term_height_pixel;
422static int hf_ssh_pty_term_modes_len;
423static int hf_ssh_pty_term_modes;
424static int hf_ssh_pty_term_mode;
425static int hf_ssh_pty_term_mode_opcode;
426static int hf_ssh_pty_term_mode_vintr;
427static int hf_ssh_pty_term_mode_vquit;
428static int hf_ssh_pty_term_mode_verase;
429static int hf_ssh_pty_term_mode_vkill;
430static int hf_ssh_pty_term_mode_veof;
431static int hf_ssh_pty_term_mode_veol;
432static int hf_ssh_pty_term_mode_veol2;
433static int hf_ssh_pty_term_mode_vstart;
434static int hf_ssh_pty_term_mode_vstop;
435static int hf_ssh_pty_term_mode_vsusp;
436static int hf_ssh_pty_term_mode_vdsusp;
437static int hf_ssh_pty_term_mode_vreprint;
438static int hf_ssh_pty_term_mode_vwerase;
439static int hf_ssh_pty_term_mode_vlnext;
440static int hf_ssh_pty_term_mode_vflush;
441static int hf_ssh_pty_term_mode_vswtch;
442static int hf_ssh_pty_term_mode_vstatus;
443static int hf_ssh_pty_term_mode_vdiscard;
444static int hf_ssh_pty_term_mode_ignpar;
445static int hf_ssh_pty_term_mode_parmrk;
446static int hf_ssh_pty_term_mode_inpck;
447static int hf_ssh_pty_term_mode_istrip;
448static int hf_ssh_pty_term_mode_inlcr;
449static int hf_ssh_pty_term_mode_igncr;
450static int hf_ssh_pty_term_mode_icrnl;
451static int hf_ssh_pty_term_mode_iuclc;
452static int hf_ssh_pty_term_mode_ixon;
453static int hf_ssh_pty_term_mode_ixany;
454static int hf_ssh_pty_term_mode_ixoff;
455static int hf_ssh_pty_term_mode_imaxbel;
456static int hf_ssh_pty_term_mode_iutf8;
457static int hf_ssh_pty_term_mode_isig;
458static int hf_ssh_pty_term_mode_icanon;
459static int hf_ssh_pty_term_mode_xcase;
460static int hf_ssh_pty_term_mode_echo;
461static int hf_ssh_pty_term_mode_echoe;
462static int hf_ssh_pty_term_mode_echok;
463static int hf_ssh_pty_term_mode_echonl;
464static int hf_ssh_pty_term_mode_noflsh;
465static int hf_ssh_pty_term_mode_tostop;
466static int hf_ssh_pty_term_mode_iexten;
467static int hf_ssh_pty_term_mode_echoctl;
468static int hf_ssh_pty_term_mode_echoke;
469static int hf_ssh_pty_term_mode_pendin;
470static int hf_ssh_pty_term_mode_opost;
471static int hf_ssh_pty_term_mode_olcuc;
472static int hf_ssh_pty_term_mode_onlcr;
473static int hf_ssh_pty_term_mode_ocrnl;
474static int hf_ssh_pty_term_mode_onocr;
475static int hf_ssh_pty_term_mode_onlret;
476static int hf_ssh_pty_term_mode_cs7;
477static int hf_ssh_pty_term_mode_cs8;
478static int hf_ssh_pty_term_mode_parenb;
479static int hf_ssh_pty_term_mode_parodd;
480static int hf_ssh_pty_term_mode_ispeed;
481static int hf_ssh_pty_term_mode_ospeed;
482static int hf_ssh_pty_term_mode_value;
483static int hf_ssh_channel_window_adjust;
484static int hf_ssh_channel_data_len;
485static int hf_ssh_channel_data_type_code;
486static int hf_ssh_exit_status;
487static int hf_ssh_disconnect_reason;
488static int hf_ssh_disconnect_description_length;
489static int hf_ssh_disconnect_description;
490static int hf_ssh_lang_tag_length;
491static int hf_ssh_lang_tag;
492static int hf_ssh_ping_data_length;
493static int hf_ssh_ping_data;
494static int hf_ssh_pong_data_length;
495static int hf_ssh_pong_data;
496
497static int hf_ssh_blob;
498static int hf_ssh_blob_e;
499static int hf_ssh_blob_n;
500static int hf_ssh_blob_dsa_p;
501static int hf_ssh_blob_dsa_q;
502static int hf_ssh_blob_dsa_g;
503static int hf_ssh_blob_dsa_y;
504static int hf_ssh_blob_ecdsa_curve_id;
505static int hf_ssh_blob_ecdsa_curve_id_length;
506static int hf_ssh_blob_ecdsa_q;
507static int hf_ssh_blob_ecdsa_q_length;
508static int hf_ssh_blob_eddsa_key;
509static int hf_ssh_blob_eddsa_key_length;
510static int hf_ssh_blob_data;
511
512static int hf_ssh_pk_sig_s_length;
513static int hf_ssh_pk_sig_s;
514
515static int hf_ssh_reassembled_in;
516static int hf_ssh_reassembled_length;
517static int hf_ssh_reassembled_data;
518static int hf_ssh_segments;
519static int hf_ssh_segment;
520static int hf_ssh_segment_overlap;
521static int hf_ssh_segment_overlap_conflict;
522static int hf_ssh_segment_multiple_tails;
523static int hf_ssh_segment_too_long_fragment;
524static int hf_ssh_segment_error;
525static int hf_ssh_segment_count;
526static int hf_ssh_segment_data;
527
528static int ett_ssh;
529static int ett_key_exchange;
530static int ett_key_exchange_host_key;
531static int ett_key_exchange_host_sig;
532static int ett_extension;
533static int ett_userauth_pk_blob;
534static int ett_userauth_pk_signature;
535static int ett_term_modes;
536static int ett_term_mode;
537static int ett_key_init;
538static int ett_ssh1;
539static int ett_ssh2;
540static int ett_ssh_segments;
541static int ett_ssh_segment;
542static int ett_ssh_pqhybrid_client;
543static int ett_ssh_pqhybrid_server;
544
545static expert_field ei_ssh_packet_length;
546static expert_field ei_ssh_padding_length;
547static expert_field ei_ssh_packet_decode;
548static expert_field ei_ssh_channel_number;
549static expert_field ei_ssh_invalid_keylen;
550static expert_field ei_ssh_mac_bad;
551static expert_field ei_ssh2_kex_hybrid_msg_code;
552static expert_field ei_ssh2_kex_hybrid_msg_code_unknown;
553
554static bool_Bool ssh_desegment = true1;
555static bool_Bool ssh_ignore_mac_failed;
556
557static dissector_handle_t ssh_handle;
558static dissector_handle_t sftp_handle;
559static dissector_handle_t data_text_lines_handle;
560
561static const char *pref_keylog_file;
562static FILE *ssh_keylog_file;
563
564static reassembly_table ssh_reassembly_table;
565
566static const fragment_items ssh_segment_items = {
567 &ett_ssh_segment,
568 &ett_ssh_segments,
569 &hf_ssh_segments,
570 &hf_ssh_segment,
571 &hf_ssh_segment_overlap,
572 &hf_ssh_segment_overlap_conflict,
573 &hf_ssh_segment_multiple_tails,
574 &hf_ssh_segment_too_long_fragment,
575 &hf_ssh_segment_error,
576 &hf_ssh_segment_count,
577 &hf_ssh_reassembled_in,
578 &hf_ssh_reassembled_length,
579 &hf_ssh_reassembled_data,
580 "Segments"
581};
582
583#define SSH_DECRYPT_DEBUG
584
585#ifdef SSH_DECRYPT_DEBUG
586static const char *ssh_debug_file_name;
587#endif
588
589#define TCP_RANGE_SSH"22" "22"
590#define SCTP_PORT_SSH22 22
591
592/* Message Numbers (from RFC 4250) (1-255) */
593
594/* Transport layer protocol: generic (1-19) */
595#define SSH_MSG_DISCONNECT1 1
596#define SSH_MSG_IGNORE2 2
597#define SSH_MSG_UNIMPLEMENTED3 3
598#define SSH_MSG_DEBUG4 4
599#define SSH_MSG_SERVICE_REQUEST5 5
600#define SSH_MSG_SERVICE_ACCEPT6 6
601#define SSH_MSG_EXT_INFO7 7
602#define SSH_MSG_NEWCOMPRESS8 8
603
604/* Transport layer protocol: Algorithm negotiation (20-29) */
605#define SSH_MSG_KEXINIT20 20
606#define SSH_MSG_NEWKEYS21 21
607
608/* Transport layer: Key exchange method specific (reusable) (30-49) */
609#define SSH_MSG_KEXDH_INIT30 30
610#define SSH_MSG_KEXDH_REPLY31 31
611
612#define SSH_MSG_KEX_DH_GEX_REQUEST_OLD30 30
613#define SSH_MSG_KEX_DH_GEX_GROUP31 31
614#define SSH_MSG_KEX_DH_GEX_INIT32 32
615#define SSH_MSG_KEX_DH_GEX_REPLY33 33
616#define SSH_MSG_KEX_DH_GEX_REQUEST34 34
617
618#define SSH_MSG_KEX_ECDH_INIT30 30
619#define SSH_MSG_KEX_ECDH_REPLY31 31
620
621#define SSH_MSG_KEX_HYBRID_INIT30 30
622#define SSH_MSG_KEX_HYBRID_REPLY31 31
623
624/* User authentication protocol: generic (50-59) */
625#define SSH_MSG_USERAUTH_REQUEST50 50
626#define SSH_MSG_USERAUTH_FAILURE51 51
627#define SSH_MSG_USERAUTH_SUCCESS52 52
628#define SSH_MSG_USERAUTH_BANNER53 53
629
630/* User authentication protocol: method specific (reusable) (50-79) */
631#define SSH_MSG_USERAUTH_PK_OK60 60
632
633/* Connection protocol: generic (80-89) */
634#define SSH_MSG_GLOBAL_REQUEST80 80
635#define SSH_MSG_REQUEST_SUCCESS81 81
636#define SSH_MSG_REQUEST_FAILURE82 82
637
638/* Connection protocol: channel related messages (90-127) */
639#define SSH_MSG_CHANNEL_OPEN90 90
640#define SSH_MSG_CHANNEL_OPEN_CONFIRMATION91 91
641#define SSH_MSG_CHANNEL_OPEN_FAILURE92 92
642#define SSH_MSG_CHANNEL_WINDOW_ADJUST93 93
643#define SSH_MSG_CHANNEL_DATA94 94
644#define SSH_MSG_CHANNEL_EXTENDED_DATA95 95
645#define SSH_MSG_CHANNEL_EOF96 96
646#define SSH_MSG_CHANNEL_CLOSE97 97
647#define SSH_MSG_CHANNEL_REQUEST98 98
648#define SSH_MSG_CHANNEL_SUCCESS99 99
649#define SSH_MSG_CHANNEL_FAILURE100 100
650
651/* 128-191 reserved for client protocols */
652/* 192-255 local extensions */
653#define SSH_MSG_PING192 192
654#define SSH_MSG_PONG193 193
655
656#define CIPHER_AES128_CTR0x00010001 0x00010001
657#define CIPHER_AES192_CTR0x00010003 0x00010003
658#define CIPHER_AES256_CTR0x00010004 0x00010004
659#define CIPHER_AES128_CBC0x00020001 0x00020001
660#define CIPHER_AES192_CBC0x00020002 0x00020002
661#define CIPHER_AES256_CBC0x00020004 0x00020004
662#define CIPHER_AES128_GCM0x00040001 0x00040001
663//#define CIPHER_AES192_GCM 0x00040002 -- does not exist
664#define CIPHER_AES256_GCM0x00040004 0x00040004
665// DO NOT USE 0x00040000 (used by SSH_KEX_SNTRUP761X25519)
666#define CIPHER_NULL0x00080000 0x00080000
667
668#define CIPHER_MAC_SHA2_2560x00020001 0x00020001
669
670#define SSH_EXTENDED_DATA_STDERR1 1
671
672#define SSH_TTY_OP_END0 0
673#define SSH_TTY_OP_VINTR1 1
674#define SSH_TTY_OP_VQUIT2 2
675#define SSH_TTY_OP_VERASE3 3
676#define SSH_TTY_OP_VKILL4 4
677#define SSH_TTY_OP_VEOF5 5
678#define SSH_TTY_OP_VEOL6 6
679#define SSH_TTY_OP_VEOL27 7
680#define SSH_TTY_OP_VSTART8 8
681#define SSH_TTY_OP_VSTOP9 9
682#define SSH_TTY_OP_VSUSP10 10
683#define SSH_TTY_OP_VDSUSP11 11
684#define SSH_TTY_OP_VREPRINT12 12
685#define SSH_TTY_OP_VWERASE13 13
686#define SSH_TTY_OP_VLNEXT14 14
687#define SSH_TTY_OP_VFLUSH15 15
688#define SSH_TTY_OP_VSWTCH16 16
689#define SSH_TTY_OP_VSTATUS17 17
690#define SSH_TTY_OP_VDISCARD18 18
691#define SSH_TTY_OP_IGNPAR30 30
692#define SSH_TTY_OP_PARMRK31 31
693#define SSH_TTY_OP_INPCK32 32
694#define SSH_TTY_OP_ISTRIP33 33
695#define SSH_TTY_OP_INLCR34 34
696#define SSH_TTY_OP_IGNCR35 35
697#define SSH_TTY_OP_ICRNL36 36
698#define SSH_TTY_OP_IUCLC37 37
699#define SSH_TTY_OP_IXON38 38
700#define SSH_TTY_OP_IXANY39 39
701#define SSH_TTY_OP_IXOFF40 40
702#define SSH_TTY_OP_IMAXBEL41 41
703#define SSH_TTY_OP_IUTF842 42
704#define SSH_TTY_OP_ISIG50 50
705#define SSH_TTY_OP_ICANON51 51
706#define SSH_TTY_OP_XCASE52 52
707#define SSH_TTY_OP_ECHO53 53
708#define SSH_TTY_OP_ECHOE54 54
709#define SSH_TTY_OP_ECHOK55 55
710#define SSH_TTY_OP_ECHONL56 56
711#define SSH_TTY_OP_NOFLSH57 57
712#define SSH_TTY_OP_TOSTOP58 58
713#define SSH_TTY_OP_IEXTEN59 59
714#define SSH_TTY_OP_ECHOCTL60 60
715#define SSH_TTY_OP_ECHOKE61 61
716#define SSH_TTY_OP_PENDIN62 62
717#define SSH_TTY_OP_OPOST70 70
718#define SSH_TTY_OP_OLCUC71 71
719#define SSH_TTY_OP_ONLCR72 72
720#define SSH_TTY_OP_OCRNL73 73
721#define SSH_TTY_OP_ONOCR74 74
722#define SSH_TTY_OP_ONLRET75 75
723#define SSH_TTY_OP_CS790 90
724#define SSH_TTY_OP_CS891 91
725#define SSH_TTY_OP_PARENB92 92
726#define SSH_TTY_OP_PARODD93 93
727#define SSH_TTY_OP_ISPEED128 128
728#define SSH_TTY_OP_OSPEED129 129
729
730static const value_string ssh2_msg_vals[] = {
731 { SSH_MSG_DISCONNECT1, "Disconnect" },
732 { SSH_MSG_IGNORE2, "Ignore" },
733 { SSH_MSG_UNIMPLEMENTED3, "Unimplemented" },
734 { SSH_MSG_DEBUG4, "Debug" },
735 { SSH_MSG_SERVICE_REQUEST5, "Service Request" },
736 { SSH_MSG_SERVICE_ACCEPT6, "Service Accept" },
737 { SSH_MSG_EXT_INFO7, "Extension Information" },
738 { SSH_MSG_NEWCOMPRESS8, "New Compression" },
739 { SSH_MSG_KEXINIT20, "Key Exchange Init" },
740 { SSH_MSG_NEWKEYS21, "New Keys" },
741 { SSH_MSG_USERAUTH_REQUEST50, "User Authentication Request" },
742 { SSH_MSG_USERAUTH_FAILURE51, "User Authentication Failure" },
743 { SSH_MSG_USERAUTH_SUCCESS52, "User Authentication Success" },
744 { SSH_MSG_USERAUTH_BANNER53, "User Authentication Banner" },
745 { SSH_MSG_GLOBAL_REQUEST80, "Global Request" },
746 { SSH_MSG_REQUEST_SUCCESS81, "Request Success" },
747 { SSH_MSG_REQUEST_FAILURE82, "Request Failure" },
748 { SSH_MSG_CHANNEL_OPEN90, "Channel Open" },
749 { SSH_MSG_CHANNEL_OPEN_CONFIRMATION91, "Channel Open Confirmation" },
750 { SSH_MSG_CHANNEL_OPEN_FAILURE92, "Channel Open Failure" },
751 { SSH_MSG_CHANNEL_WINDOW_ADJUST93, "Window Adjust" },
752 { SSH_MSG_CHANNEL_DATA94, "Channel Data" },
753 { SSH_MSG_CHANNEL_EXTENDED_DATA95, "Channel Extended Data" },
754 { SSH_MSG_CHANNEL_EOF96, "Channel EOF" },
755 { SSH_MSG_CHANNEL_CLOSE97, "Channel Close" },
756 { SSH_MSG_CHANNEL_REQUEST98, "Channel Request" },
757 { SSH_MSG_CHANNEL_SUCCESS99, "Channel Success" },
758 { SSH_MSG_CHANNEL_FAILURE100, "Channel Failure" },
759 { SSH_MSG_USERAUTH_PK_OK60, "Public Key algorithm accepted" },
760 { 0, NULL((void*)0) }
761};
762
763static const value_string ssh2_kex_dh_msg_vals[] = {
764 { SSH_MSG_KEXDH_INIT30, "Diffie-Hellman Key Exchange Init" },
765 { SSH_MSG_KEXDH_REPLY31, "Diffie-Hellman Key Exchange Reply" },
766 { 0, NULL((void*)0) }
767};
768
769static const value_string ssh2_kex_dh_gex_msg_vals[] = {
770 { SSH_MSG_KEX_DH_GEX_REQUEST_OLD30, "Diffie-Hellman Group Exchange Request (Old)" },
771 { SSH_MSG_KEX_DH_GEX_GROUP31, "Diffie-Hellman Group Exchange Group" },
772 { SSH_MSG_KEX_DH_GEX_INIT32, "Diffie-Hellman Group Exchange Init" },
773 { SSH_MSG_KEX_DH_GEX_REPLY33, "Diffie-Hellman Group Exchange Reply" },
774 { SSH_MSG_KEX_DH_GEX_REQUEST34, "Diffie-Hellman Group Exchange Request" },
775 { 0, NULL((void*)0) }
776};
777
778static const value_string ssh2_kex_ecdh_msg_vals[] = {
779 { SSH_MSG_KEX_ECDH_INIT30, "Elliptic Curve Diffie-Hellman Key Exchange Init" },
780 { SSH_MSG_KEX_ECDH_REPLY31, "Elliptic Curve Diffie-Hellman Key Exchange Reply" },
781 { 0, NULL((void*)0) }
782};
783
784static const value_string ssh2_kex_hybrid_msg_vals[] = {
785 { SSH_MSG_KEX_HYBRID_INIT30, "PQ/T Hybrid Key Exchange Init" },
786 { SSH_MSG_KEX_HYBRID_REPLY31, "PQ/T Hybrid Key Exchange Reply" },
787 { 0, NULL((void*)0) }
788};
789
790static const value_string ssh2_ext_ping_msg_vals[] = {
791 { SSH_MSG_PING192, "Ping" },
792 { SSH_MSG_PONG193, "Pong" },
793 { 0, NULL((void*)0) }
794};
795
796static const value_string ssh1_msg_vals[] = {
797 {SSH1_MSG_NONE0, "No Message"},
798 {SSH1_MSG_DISCONNECT1, "Disconnect"},
799 {SSH1_SMSG_PUBLIC_KEY2, "Public Key"},
800 {SSH1_CMSG_SESSION_KEY3, "Session Key"},
801 {SSH1_CMSG_USER4, "User"},
802 {0, NULL((void*)0)}
803};
804
805static const value_string ssh_channel_data_type_code_vals[] = {
806 { SSH_EXTENDED_DATA_STDERR1, "Standard Error" },
807 { 0, NULL((void*)0) }
808};
809
810static const value_string ssh_tty_op_vals[] = {
811 { SSH_TTY_OP_END0, "TTY_OP_END" }, // [RFC4250]
812 { SSH_TTY_OP_VINTR1, "VINTR" }, // [RFC4254],Section 8
813 { SSH_TTY_OP_VQUIT2, "VQUIT" }, // [RFC4254],Section 8
814 { SSH_TTY_OP_VERASE3, "VERASE" }, // [RFC4254],Section 8
815 { SSH_TTY_OP_VKILL4, "VKILL" }, // [RFC4254], Section 8
816 { SSH_TTY_OP_VEOF5, "VEOF" }, // [RFC4254],Section 8
817 { SSH_TTY_OP_VEOL6, "VEOL" }, // [RFC4254],Section 8
818 { SSH_TTY_OP_VEOL27, "VEOL2" }, // [RFC4254], Section 8
819 { SSH_TTY_OP_VSTART8, "VSTART" }, // [RFC4254],Section 8
820 { SSH_TTY_OP_VSTOP9, "VSTOP" }, // [RFC4254], Section 8
821 { SSH_TTY_OP_VSUSP10, "VSUSP" }, // [RFC4254], Section 8
822 { SSH_TTY_OP_VDSUSP11, "VDSUSP" }, // [RFC4254], Section 8
823 { SSH_TTY_OP_VREPRINT12, "VREPRINT" }, // [RFC4254], Section 8
824 { SSH_TTY_OP_VWERASE13, "VWERASE" }, // [RFC4254], Section 8
825 { SSH_TTY_OP_VLNEXT14, "VLNEXT" }, // [RFC4254],Section 8
826 { SSH_TTY_OP_VFLUSH15, "VFLUSH" }, // [RFC4254], Section 8
827 { SSH_TTY_OP_VSWTCH16, "VSWTCH" }, // [RFC4254], Section 8
828 { SSH_TTY_OP_VSTATUS17, "VSTATUS" }, // [RFC4254],Section 8
829 { SSH_TTY_OP_VDISCARD18, "VDISCARD" }, // [RFC4254], Section 8
830 { SSH_TTY_OP_IGNPAR30, "IGNPAR" }, // [RFC4254],Section 8
831 { SSH_TTY_OP_PARMRK31, "PARMRK" }, // [RFC4254], Section 8
832 { SSH_TTY_OP_INPCK32, "INPCK" }, // [RFC4254], Section 8
833 { SSH_TTY_OP_ISTRIP33, "ISTRIP" }, // [RFC4254], Section 8
834 { SSH_TTY_OP_INLCR34, "INLCR" }, // [RFC4254], Section 8
835 { SSH_TTY_OP_IGNCR35, "IGNCR" }, // [RFC4254], Section 8
836 { SSH_TTY_OP_ICRNL36, "ICRNL" }, // [RFC4254], Section 8
837 { SSH_TTY_OP_IUCLC37, "IUCLC" }, // [RFC4254],Section 8
838 { SSH_TTY_OP_IXON38, "IXON" }, // [RFC4254], Section 8
839 { SSH_TTY_OP_IXANY39, "IXANY" }, // [RFC4254], Section 8
840 { SSH_TTY_OP_IXOFF40, "IXOFF" }, // [RFC4254], Section 8
841 { SSH_TTY_OP_IMAXBEL41, "IMAXBEL" }, // [RFC4254], Section 8
842 { SSH_TTY_OP_IUTF842, "IUTF8" }, // [RFC8160],
843 { SSH_TTY_OP_ISIG50, "ISIG" }, // [RFC4254], Section 8
844 { SSH_TTY_OP_ICANON51, "ICANON" }, // [RFC4254], Section 8
845 { SSH_TTY_OP_XCASE52, "XCASE" }, // [RFC4254],Section 8
846 { SSH_TTY_OP_ECHO53, "ECHO" }, // [RFC4254], Section 8
847 { SSH_TTY_OP_ECHOE54, "ECHOE" }, // [RFC4254], Section 8
848 { SSH_TTY_OP_ECHOK55, "ECHOK" }, // [RFC4254], Section 8
849 { SSH_TTY_OP_ECHONL56, "ECHONL" }, // [RFC4254], Section 8
850 { SSH_TTY_OP_NOFLSH57, "NOFLSH" }, // [RFC4254],Section 8
851 { SSH_TTY_OP_TOSTOP58, "TOSTOP" }, // [RFC4254], Section 8
852 { SSH_TTY_OP_IEXTEN59, "IEXTEN" }, // [RFC4254], Section 8
853 { SSH_TTY_OP_ECHOCTL60, "ECHOCTL" }, // [RFC4254], Section 8
854 { SSH_TTY_OP_ECHOKE61, "ECHOKE" }, // [RFC4254], Section 8
855 { SSH_TTY_OP_PENDIN62, "PENDIN" }, // [RFC4254], Section 8
856 { SSH_TTY_OP_OPOST70, "OPOST" }, // [RFC4254], Section 8
857 { SSH_TTY_OP_OLCUC71, "OLCUC" }, // [RFC4254], Section 8
858 { SSH_TTY_OP_ONLCR72, "ONLCR" }, // [RFC4254], Section 8
859 { SSH_TTY_OP_OCRNL73, "OCRNL" }, // [RFC4254],Section 8
860 { SSH_TTY_OP_ONOCR74, "ONOCR" }, // [RFC4254],Section 8
861 { SSH_TTY_OP_ONLRET75, "ONLRET" }, // [RFC4254],Section 8
862 { SSH_TTY_OP_CS790, "CS7" }, // [RFC4254], Section 8
863 { SSH_TTY_OP_CS891, "CS8" }, // [RFC4254], Section 8
864 { SSH_TTY_OP_PARENB92, "PARENB" }, // [RFC4254], Section 8
865 { SSH_TTY_OP_PARODD93, "PARODD" }, // [RFC4254], Section 8
866 { SSH_TTY_OP_ISPEED128, "TTY_OP_ISPEED" }, // [RFC4254],Section 8
867 { SSH_TTY_OP_OSPEED129, "TTY_OP_OSPEED" }, // [RFC4254],Section 8
868 { 0, NULL((void*)0) }
869};
870
871static int ssh_dissect_key_init(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree,
872 int is_response,
873 struct ssh_flow_data *global_data);
874static int ssh_dissect_proposal(tvbuff_t *tvb, int offset, proto_tree *tree,
875 int hf_index_length, int hf_index_value, char **store);
876static int ssh_dissect_ssh1(tvbuff_t *tvb, packet_info *pinfo,
877 struct ssh_flow_data *global_data,
878 int offset, proto_tree *tree, int is_response,
879 bool_Bool *need_desegmentation);
880static int ssh_dissect_ssh2(tvbuff_t *tvb, packet_info *pinfo,
881 struct ssh_flow_data *global_data,
882 int offset, proto_tree *tree, int is_response,
883 bool_Bool *need_desegmentation);
884static int ssh_dissect_key_exchange(tvbuff_t *tvb, packet_info *pinfo,
885 struct ssh_flow_data *global_data,
886 int offset, proto_tree *tree, int is_response,
887 bool_Bool *need_desegmentation);
888static int ssh_dissect_kex_dh(uint8_t msg_code, tvbuff_t *tvb,
889 packet_info *pinfo, int offset, proto_tree *tree,
890 struct ssh_flow_data *global_data);
891static int ssh_dissect_kex_dh_gex(uint8_t msg_code, tvbuff_t *tvb,
892 packet_info *pinfo, int offset, proto_tree *tree,
893 struct ssh_flow_data *global_data);
894static int ssh_dissect_kex_ecdh(uint8_t msg_code, tvbuff_t *tvb,
895 packet_info *pinfo, int offset, proto_tree *tree,
896 struct ssh_flow_data *global_data);
897static int ssh_dissect_kex_pq_hybrid(uint8_t msg_code, tvbuff_t *tvb,
898 packet_info *pinfo, int offset, proto_tree *tree,
899 struct ssh_flow_data *global_data);
900static int // add support of client PQ hybrid key (e)
901ssh_read_e_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data);
902static int // add support of server PQ hybrid key (f)
903ssh_read_f_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data);
904static int ssh_dissect_protocol(tvbuff_t *tvb, packet_info *pinfo,
905 struct ssh_flow_data *global_data,
906 unsigned offset, proto_tree *tree, int is_response, unsigned *version,
907 bool_Bool *need_desegmentation);
908static int ssh_try_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
909 struct ssh_peer_data *peer_data, int offset, proto_tree *tree);
910static int ssh_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
911 struct ssh_peer_data *peer_data,
912 int offset, proto_tree *tree);
913static bool_Bool ssh_choose_algo(char *client, char *server, char **result);
914static void ssh_set_mac_length(struct ssh_peer_data *peer_data);
915static void ssh_set_kex_specific_dissector(struct ssh_flow_data *global_data);
916
917static void ssh_keylog_read_file(void);
918static void ssh_keylog_process_line(const char *line);
919static void ssh_keylog_process_lines(const uint8_t *data, unsigned datalen);
920static void ssh_keylog_reset(void);
921static ssh_bignum *ssh_kex_make_bignum(const uint8_t *data, unsigned length);
922static bool_Bool ssh_read_e(tvbuff_t *tvb, int offset,
923 struct ssh_flow_data *global_data);
924static bool_Bool ssh_read_f(tvbuff_t *tvb, int offset,
925 struct ssh_flow_data *global_data);
926static ssh_bignum * ssh_read_mpint(tvbuff_t *tvb, int offset);
927static void ssh_keylog_hash_write_secret(struct ssh_flow_data *global_data, wmem_allocator_t* tmp_allocator);
928static ssh_bignum *ssh_kex_shared_secret(int kex_type, ssh_bignum *pub, ssh_bignum *priv, ssh_bignum *modulo);
929static void ssh_hash_buffer_put_string(wmem_array_t *buffer, const uint8_t *string,
930 unsigned len);
931static void ssh_hash_buffer_put_uint32(wmem_array_t *buffer, unsigned val);
932static char *ssh_string(wmem_allocator_t* allocator, const uint8_t *string, unsigned len);
933static void ssh_derive_symmetric_keys(ssh_bignum *shared_secret,
934 uint8_t *exchange_hash, unsigned hash_length,
935 struct ssh_flow_data *global_data);
936static void ssh_derive_symmetric_key(ssh_bignum *shared_secret,
937 const uint8_t *exchange_hash, unsigned hash_length, char id,
938 ssh_bignum *result_key, struct ssh_flow_data *global_data, unsigned we_need);
939
940static void ssh_choose_enc_mac(struct ssh_flow_data *global_data);
941static void ssh_decryption_set_cipher_id(struct ssh_peer_data *peer);
942static void ssh_decryption_setup_cipher(struct ssh_peer_data *peer,
943 ssh_bignum *iv, ssh_bignum *key);
944static void ssh_decryption_set_mac_id(struct ssh_peer_data *peer);
945static void ssh_decryption_setup_mac(struct ssh_peer_data *peer,
946 ssh_bignum *iv);
947static ssh_packet_info_t* ssh_get_packet_info(packet_info *pinfo, bool_Bool is_response);
948static ssh_message_info_t* ssh_get_message(packet_info *pinfo, int record_id);
949static unsigned ssh_decrypt_packet(tvbuff_t *tvb, packet_info *pinfo,
950 struct ssh_peer_data *peer_data, int offset);
951static bool_Bool ssh_decrypt_chacha20(gcry_cipher_hd_t hd, uint32_t seqnr,
952 uint32_t counter, const unsigned char *ctext, unsigned ctext_len,
953 unsigned char *plain, unsigned plain_len);
954static int ssh_dissect_decrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
955 struct ssh_peer_data *peer_data, proto_tree *tree,
956 ssh_message_info_t *message);
957static int ssh_dissect_transport_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
958 int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code);
959static int ssh_dissect_rfc8308_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
960 int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree);
961static int ssh_dissect_userauth_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
962 int offset, proto_item *msg_type_tree, unsigned msg_code);
963static int ssh_dissect_userauth_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
964 int offset, proto_item *msg_type_tree, unsigned msg_code);
965static int ssh_dissect_connection_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
966 struct ssh_peer_data *peer_data, int offset, proto_item *msg_type_tree,
967 unsigned msg_code, ssh_message_info_t *message);
968static int ssh_dissect_connection_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
969 int offset, proto_item *msg_type_tree, unsigned msg_code);
970static int ssh_dissect_local_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
971 int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code);
972static int ssh_dissect_public_key_blob(tvbuff_t *tvb, packet_info *pinfo,
973 proto_item *msg_type_tree);
974static int ssh_dissect_public_key_signature(tvbuff_t *packet_tvb, packet_info *pinfo,
975 int offset, proto_item *msg_type_tree);
976
977static void create_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, uint32_t sender_channel);
978static ssh_channel_info_t* get_channel_info_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel);
979static void set_subdissector_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, const char* subsystem_name);
980
981#define SSH_DEBUG_USE_STDERR"-" "-"
982
983#ifdef SSH_DECRYPT_DEBUG
984static void
985ssh_debug_printf(const char* fmt,...) G_GNUC_PRINTF(1,2)__attribute__((__format__ (__printf__, 1, 2)));
986static void
987ssh_print_data(const char* name, const unsigned char* data, size_t len);
988static void
989ssh_set_debug(const char* name);
990static void
991ssh_debug_flush(void);
992#else
993
994/* No debug: nullify debug operation*/
995static inline void G_GNUC_PRINTF(1,2)__attribute__((__format__ (__printf__, 1, 2)))
996ssh_debug_printf(const char* fmt _U___attribute__((unused)),...)
997{
998}
999#define ssh_print_data(a, b, c)
1000#define ssh_print_string(a, b)
1001#define ssh_set_debug(name)
1002#define ssh_debug_flush()
1003
1004#endif /* SSH_DECRYPT_DEBUG */
1005
1006static void
1007ssh_set_server(struct ssh_flow_data *global_data, address *addr, uint32_t port)
1008{
1009 copy_address_wmem(wmem_file_scope(), &global_data->srv_addr, addr);
1010 global_data->srv_port = port;
1011}
1012
1013static bool_Bool
1014ssh_packet_from_server(struct ssh_flow_data *session, const packet_info *pinfo)
1015{
1016 bool_Bool ret;
1017 if (session && session->srv_addr.type != AT_NONE) {
1018 ret = (session->srv_port == pinfo->srcport) &&
1019 addresses_equal(&session->srv_addr, &pinfo->src);
1020 } else {
1021 ret = (pinfo->match_uint == pinfo->srcport);
1022 }
1023
1024 ssh_debug_printf("packet_from_server: is from server - %s\n", (ret)?"TRUE":"FALSE");
1025 return ret;
1026}
1027
1028static bool_Bool
1029ssh_peer_data_from_server(struct ssh_peer_data* peer_data) {
1030 return &peer_data->global_data->peer_data[SERVER_PEER_DATA1] == peer_data;
1031}
1032
1033static int
1034dissect_ssh(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
1035{
1036 proto_tree *ssh_tree;
1037 proto_item *ti;
1038 conversation_t *conversation;
1039 int last_offset, offset = 0;
1040
1041 bool_Bool is_response,
1042 need_desegmentation;
1043 unsigned version;
1044
1045 struct ssh_flow_data *global_data = NULL((void*)0);
1046 struct ssh_peer_data *peer_data;
1047
1048 ssh_debug_printf("\ndissect_ssh enter frame #%u (%s)\n", pinfo->num, (pinfo->fd->visited)?"already visited":"first time");
1049
1050 conversation = find_or_create_conversation(pinfo);
1051
1052 global_data = (struct ssh_flow_data *)conversation_get_proto_data(conversation, proto_ssh);
1053 if (!global_data) {
1054 global_data = wmem_new0(wmem_file_scope(), struct ssh_flow_data)((struct ssh_flow_data*)wmem_alloc0((wmem_file_scope()), sizeof
(struct ssh_flow_data)));
1055 global_data->version = SSH_VERSION_UNKNOWN0;
1056 global_data->kex_specific_dissector = ssh_dissect_kex_dh;
1057 global_data->peer_data[CLIENT_PEER_DATA0].mac_length = -1;
1058 global_data->peer_data[SERVER_PEER_DATA1].mac_length = -1;
1059 global_data->peer_data[CLIENT_PEER_DATA0].sequence_number = 0;
1060 global_data->peer_data[SERVER_PEER_DATA1].sequence_number = 0;
1061 global_data->peer_data[CLIENT_PEER_DATA0].bn_cookie = NULL((void*)0);
1062 global_data->peer_data[SERVER_PEER_DATA1].bn_cookie = NULL((void*)0);
1063 global_data->peer_data[CLIENT_PEER_DATA0].global_data = global_data;
1064 global_data->peer_data[SERVER_PEER_DATA1].global_data = global_data;
1065 global_data->kex_client_version = wmem_array_new(wmem_file_scope(), 1);
1066 global_data->kex_server_version = wmem_array_new(wmem_file_scope(), 1);
1067 global_data->kex_client_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
1068 global_data->kex_server_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
1069 global_data->kex_server_host_key_blob = wmem_array_new(wmem_file_scope(), 1);
1070 global_data->kex_gex_bits_min = wmem_array_new(wmem_file_scope(), 1);
1071 global_data->kex_gex_bits_req = wmem_array_new(wmem_file_scope(), 1);
1072 global_data->kex_gex_bits_max = wmem_array_new(wmem_file_scope(), 1);
1073 global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
1074 global_data->do_decrypt = true1;
1075 global_data->ext_ping_openssh_offered = false0;
1076
1077 /* We expect to get the client message first. If this is from an
1078 * an assigned server port, call it the server, otherwise call it
1079 * the client.
1080 * XXX - We don't unambiguously know which side is the server and
1081 * which the client until the KEX specific _INIT and _REPLY messages;
1082 * we ought to be able to handle the cases where the version string or
1083 * KEXINIT messages are out of order or where the client version string
1084 * is missing. */
1085 if (pinfo->match_uint == pinfo->srcport) {
1086 ssh_set_server(global_data, &pinfo->src, pinfo->srcport);
1087 } else {
1088 ssh_set_server(global_data, &pinfo->dst, pinfo->destport);
1089 }
1090
1091 conversation_add_proto_data(conversation, proto_ssh, global_data);
1092 }
1093
1094 is_response = ssh_packet_from_server(global_data, pinfo);
1095 peer_data = &global_data->peer_data[is_response];
1096
1097 ti = proto_tree_add_item(tree, proto_ssh, tvb, offset, -1, ENC_NA0x00000000);
1098 ssh_tree = proto_item_add_subtree(ti, ett_ssh);
1099
1100 version = global_data->version;
1101
1102 switch(version) {
1103 case SSH_VERSION_UNKNOWN0:
1104 col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSH");
1105 break;
1106 case SSH_VERSION_11:
1107 col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSHv1");
1108 break;
1109 case SSH_VERSION_22:
1110 col_set_str(pinfo->cinfo, COL_PROTOCOL, "SSHv2");
1111 break;
1112
1113 }
1114
1115 col_clear(pinfo->cinfo, COL_INFO);
1116
1117 while(tvb_reported_length_remaining(tvb, offset)> 0) {
1118 bool_Bool after_version_start = (peer_data->frame_version_start == 0 ||
1119 pinfo->num >= peer_data->frame_version_start);
1120 bool_Bool before_version_end = (peer_data->frame_version_end == 0 ||
1121 pinfo->num <= peer_data->frame_version_end);
1122
1123 need_desegmentation = false0;
1124 last_offset = offset;
1125
1126 peer_data->counter++;
1127
1128 if (after_version_start && before_version_end &&
1129 (tvb_strncaseeql(tvb, offset, "SSH-", 4) == 0)) {
1130 if (peer_data->frame_version_start == 0)
1131 peer_data->frame_version_start = pinfo->num;
1132
1133 offset = ssh_dissect_protocol(tvb, pinfo,
1134 global_data,
1135 offset, ssh_tree, is_response,
1136 &version, &need_desegmentation);
1137
1138 if (!need_desegmentation) {
1139 peer_data->frame_version_end = pinfo->num;
1140 global_data->version = version;
1141 }
1142 } else {
1143 switch(version) {
1144
1145 case SSH_VERSION_UNKNOWN0:
1146 offset = ssh_try_dissect_encrypted_packet(tvb, pinfo,
1147 &global_data->peer_data[is_response], offset, ssh_tree);
1148 break;
1149
1150 case SSH_VERSION_11:
1151 offset = ssh_dissect_ssh1(tvb, pinfo, global_data,
1152 offset, ssh_tree, is_response,
1153 &need_desegmentation);
1154 break;
1155
1156 case SSH_VERSION_22:
1157 offset = ssh_dissect_ssh2(tvb, pinfo, global_data,
1158 offset, ssh_tree, is_response,
1159 &need_desegmentation);
1160 break;
1161 }
1162 }
1163
1164 if (need_desegmentation)
1165 return tvb_captured_length(tvb);
1166 if (offset <= last_offset) {
1167 /* XXX - add an expert info in the function
1168 that decrements offset */
1169 break;
1170 }
1171 }
1172
1173 col_prepend_fstr(pinfo->cinfo, COL_INFO, "%s: ", is_response ? "Server" : "Client");
1174 ti = proto_tree_add_boolean(ssh_tree, hf_ssh_direction, tvb, 0, 0, is_response);
1175 proto_item_set_generated(ti);
1176
1177 ssh_debug_flush();
1178
1179 return tvb_captured_length(tvb);
1180}
1181
1182static bool_Bool
1183dissect_ssh_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
1184{
1185 conversation_t *conversation;
1186
1187 if (tvb_strneql(tvb, 0, "SSH-", 4) != 0) {
1188 return false0;
1189 }
1190
1191 conversation = find_or_create_conversation(pinfo);
1192 conversation_set_dissector(conversation, ssh_handle);
1193
1194 dissect_ssh(tvb, pinfo, tree, data);
1195
1196 return true1;
1197}
1198
1199static int
1200ssh_dissect_ssh2(tvbuff_t *tvb, packet_info *pinfo,
1201 struct ssh_flow_data *global_data,
1202 int offset, proto_tree *tree, int is_response,
1203 bool_Bool *need_desegmentation)
1204{
1205 proto_item *ssh2_tree = NULL((void*)0);
1206 int remain_length;
1207
1208 struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
1209
1210 remain_length = tvb_captured_length_remaining(tvb, offset);
1211
1212 if (PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1213 ws_debug("SSH: SECOND PASS frame %u", pinfo->num)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 1213, __func__, "SSH: SECOND PASS frame %u", pinfo->num)
; } } while (0);
1214 }else{
1215 ws_debug("SSH: FIRST PASS frame %u", pinfo->num)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 1215, __func__, "SSH: FIRST PASS frame %u", pinfo->num);
} } while (0);
1216 }
1217
1218 while(remain_length>0){
1219 int last_offset = offset;
1220 if (tree) {
1221 wmem_strbuf_t *title = wmem_strbuf_new(pinfo->pool, "SSH Version 2");
1222
1223 if (peer_data->enc || peer_data->mac || peer_data->comp) {
1224 wmem_strbuf_append_printf(title, " (");
1225 if (peer_data->enc)
1226 wmem_strbuf_append_printf(title, "encryption:%s%s",
1227 peer_data->enc,
1228 peer_data->mac || peer_data->comp
1229 ? " " : "");
1230 if (peer_data->mac)
1231 wmem_strbuf_append_printf(title, "mac:%s%s",
1232 peer_data->mac,
1233 peer_data->comp ? " " : "");
1234 if (peer_data->comp)
1235 wmem_strbuf_append_printf(title, "compression:%s",
1236 peer_data->comp);
1237 wmem_strbuf_append_printf(title, ")");
1238 }
1239
1240 ssh2_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_ssh2, NULL((void*)0), wmem_strbuf_get_str(title));
1241 }
1242 ws_noisy("....ssh_dissect_ssh2[%c]: frame_key_start=%d, pinfo->num=%d, frame_key_end=%d, offset=%d, frame_key_end_offset=%d ", is_response==SERVER_PEER_DATA?'S':'C', peer_data->frame_key_start, pinfo->num, peer_data->frame_key_end, offset, peer_data->frame_key_end_offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c"
, 1242, __func__, "....ssh_dissect_ssh2[%c]: frame_key_start=%d, pinfo->num=%d, frame_key_end=%d, offset=%d, frame_key_end_offset=%d "
, is_response==1?'S':'C', peer_data->frame_key_start, pinfo
->num, peer_data->frame_key_end, offset, peer_data->
frame_key_end_offset); } } while (0);
1243 if ((peer_data->frame_key_start == 0) ||
1244 ((peer_data->frame_key_start <= pinfo->num) &&
1245 ((peer_data->frame_key_end == 0) || (pinfo->num < peer_data->frame_key_end) ||
1246 ((pinfo->num == peer_data->frame_key_end) && (offset < peer_data->frame_key_end_offset))))) {
1247 offset = ssh_dissect_key_exchange(tvb, pinfo, global_data,
1248 offset, ssh2_tree, is_response,
1249 need_desegmentation);
1250
1251 if (!*need_desegmentation) {
1252 ssh_get_packet_info(pinfo, is_response);
1253 }else{
1254 break;
1255 }
1256 } else {
1257 if(!*need_desegmentation){
1258 offset = ssh_try_dissect_encrypted_packet(tvb, pinfo,
1259 &global_data->peer_data[is_response], offset, ssh2_tree);
1260 if (pinfo->desegment_len) {
1261 break;
1262 }
1263 }else{
1264 break;
1265 }
1266 }
1267
1268 if (ssh2_tree) {
1269 proto_item_set_len(ssh2_tree, offset - last_offset);
1270 }
1271
1272 remain_length = tvb_captured_length_remaining(tvb, offset);
1273 }
1274
1275 return offset;
1276}
1277static int
1278ssh_dissect_ssh1(tvbuff_t *tvb, packet_info *pinfo,
1279 struct ssh_flow_data *global_data,
1280 int offset, proto_tree *tree, int is_response,
1281 bool_Bool *need_desegmentation)
1282{
1283 unsigned plen, padding_length, len;
1284 uint8_t msg_code;
1285 unsigned remain_length;
1286
1287 proto_item *ssh1_tree;
1288
1289 struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
1290
1291 ssh1_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_ssh1, NULL((void*)0), "SSH Version 1");
1292
1293 /*
1294 * We use "tvb_ensure_captured_length_remaining()" to make sure there
1295 * actually *is* data remaining.
1296 *
1297 * This means we're guaranteed that "remain_length" is positive.
1298 */
1299 remain_length = tvb_ensure_captured_length_remaining(tvb, offset);
1300 /*
1301 * Can we do reassembly?
1302 */
1303 if (ssh_desegment && pinfo->can_desegment) {
1304 /*
1305 * Yes - would an SSH header starting at this offset be split
1306 * across segment boundaries?
1307 */
1308 if (remain_length < 4) {
1309 /*
1310 * Yes. Tell the TCP dissector where the data for
1311 * this message starts in the data it handed us and
1312 * that we need "some more data." Don't tell it
1313 * exactly how many bytes we need because if/when we
1314 * ask for even more (after the header) that will
1315 * break reassembly.
1316 */
1317 pinfo->desegment_offset = offset;
1318 pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
1319 *need_desegmentation = true1;
1320 return offset;
1321 }
1322 }
1323 plen = tvb_get_ntohl(tvb, offset) ;
1324
1325 /*
1326 * Amount of random padding.
1327 *
1328 * This is between 1 and 8; if the length is a multiple of 8,
1329 * there are 8 bytes of padding, not 1 byte.
1330 *
1331 * That means this calculation is correct; do not use either
1332 * WS_ROUNDUP_8() or WS_PADDING_TO_8() here.
1333 */
1334 padding_length = 8 - plen%8;
1335
1336
1337 if (ssh_desegment && pinfo->can_desegment) {
1338 if (plen+4+padding_length > remain_length) {
1339 pinfo->desegment_offset = offset;
1340 pinfo->desegment_len = plen+padding_length - remain_length;
1341 *need_desegmentation = true1;
1342 return offset;
1343 }
1344 }
1345
1346 if (plen >= SSH_MAX_PACKET_LEN32768) {
1347 if (ssh1_tree) {
1348 proto_tree_add_uint_format(ssh1_tree, hf_ssh_packet_length, tvb,
1349 offset, 4, plen, "Overly large length %x", plen);
1350 }
1351 plen = remain_length-4-padding_length;
1352 } else {
1353 if (ssh1_tree && plen > 0) {
1354 proto_tree_add_uint(ssh1_tree, hf_ssh_packet_length, tvb,
1355 offset, 4, plen);
1356 }
1357 }
1358 offset+=4;
1359 /* padding length */
1360
1361 proto_tree_add_uint(ssh1_tree, hf_ssh_padding_length, tvb,
1362 offset, padding_length, padding_length);
1363 offset += padding_length;
1364
1365 /* msg_code */
1366 if ((peer_data->frame_key_start == 0) ||
1367 ((peer_data->frame_key_start >= pinfo->num) && (pinfo->num <= peer_data->frame_key_end))) {
1368
1369 proto_tree_add_item_ret_uint8(ssh1_tree, hf_ssh_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000, &msg_code);
1370 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1371 val_to_str(pinfo->pool, msg_code, ssh1_msg_vals, "Unknown (%u)"));
1372 offset += 1;
1373 len = plen -1;
1374 if (!pinfo->fd->visited) {
1375 if (peer_data->frame_key_start == 0)
1376 peer_data->frame_key_start = pinfo->num;
1377 peer_data->frame_key_end = pinfo->num;
1378 }
1379 } else {
1380 len = plen;
1381 col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Encrypted packet (len=%d)", len);
1382 }
1383 /* payload */
1384 if (ssh1_tree) {
1385 proto_tree_add_item(ssh1_tree, hf_ssh_payload,
1386 tvb, offset, len, ENC_NA0x00000000);
1387 }
1388 offset += len;
1389
1390 return offset;
1391}
1392
1393static int
1394ssh_tree_add_mpint(tvbuff_t *tvb, int offset, proto_tree *tree,
1395 int hf_ssh_mpint_selection)
1396{
1397 unsigned len = tvb_get_ntohl(tvb, offset);
1398 proto_tree_add_uint(tree, hf_ssh_mpint_length, tvb,
1399 offset, 4, len);
1400 offset+=4;
1401 proto_tree_add_item(tree, hf_ssh_mpint_selection,
1402 tvb, offset, len, ENC_NA0x00000000);
1403 return 4+len;
1404}
1405
1406static int
1407ssh_tree_add_string(tvbuff_t *tvb, int offset, proto_tree *tree,
1408 int hf_ssh_string, int hf_ssh_string_length)
1409{
1410 unsigned len = tvb_get_ntohl(tvb, offset);
1411 proto_tree_add_uint(tree, hf_ssh_string_length, tvb,
1412 offset, 4, len);
1413 offset+=4;
1414 proto_tree_add_item(tree, hf_ssh_string,
1415 tvb, offset, len, ENC_NA0x00000000);
1416 return 4+len;
1417}
1418
1419static unsigned
1420ssh_tree_add_hostkey(tvbuff_t *tvb, packet_info* pinfo, int offset, proto_tree *parent_tree,
1421 const char *tree_name, int ett_idx,
1422 struct ssh_flow_data *global_data)
1423{
1424 proto_tree *tree = NULL((void*)0);
1425 proto_item *ti;
1426 int last_offset;
1427 int remaining_len;
1428 unsigned key_len, type_len;
1429 char* key_type;
1430 char *tree_title;
1431
1432 last_offset = offset;
1433
1434 key_len = tvb_get_ntohl(tvb, offset);
1435 offset += 4;
1436
1437 /* Read the key type before creating the tree so we can append it as info. */
1438 type_len = tvb_get_ntohl(tvb, offset);
1439 offset += 4;
1440 key_type = (char *) tvb_get_string_enc(pinfo->pool, tvb, offset, type_len, ENC_ASCII0x00000000|ENC_NA0x00000000);
1441
1442 tree_title = wmem_strdup_printf(pinfo->pool, "%s (type: %s)", tree_name, key_type);
1443 tree = proto_tree_add_subtree(parent_tree, tvb, last_offset, key_len + 4, ett_idx, NULL((void*)0),
1444 tree_title);
1445
1446 ti = proto_tree_add_uint(tree, hf_ssh_hostkey_length, tvb, last_offset, 4, key_len);
1447
1448 // server host key (K_S / Q)
1449 uint8_t *data = (uint8_t *)tvb_memdup(pinfo->pool, tvb, last_offset + 4, key_len);
1450 if (global_data) {
1451 // Reset array while REKEY: sanitize server host key blob
1452 global_data->kex_server_host_key_blob = wmem_array_new(wmem_file_scope(), 1);
1453 ssh_hash_buffer_put_string(global_data->kex_server_host_key_blob, data, key_len);
1454 }
1455
1456 last_offset += 4;
1457 proto_tree_add_uint(tree, hf_ssh_hostkey_type_length, tvb, last_offset, 4, type_len);
1458 proto_tree_add_string(tree, hf_ssh_hostkey_type, tvb, offset, type_len, key_type);
1459 offset += type_len;
1460
1461 if (0 == strcmp(key_type, "ssh-rsa")) {
1462 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_rsa_e);
1463 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_rsa_n);
1464 } else if (0 == strcmp(key_type, "ssh-dss")) {
1465 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_p);
1466 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_q);
1467 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_g);
1468 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostkey_dsa_y);
1469 } else if (g_str_has_prefix(key_type, "ecdsa-sha2-")(__builtin_constant_p ("ecdsa-sha2-")? __extension__ ({ const
char * const __str = (key_type); const char * const __prefix
= ("ecdsa-sha2-"); gboolean __result = (0); if (__str == ((void
*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix)
(__str, __prefix); else { const size_t __str_len = strlen ((
(__str) + !(__str))); const size_t __prefix_len = strlen (((__prefix
) + !(__prefix))); if (__str_len >= __prefix_len) __result
= memcmp (((__str) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len
) == 0; } __result; }) : (g_str_has_prefix) (key_type, "ecdsa-sha2-"
) )) {
1470 offset += ssh_tree_add_string(tvb, offset, tree,
1471 hf_ssh_hostkey_ecdsa_curve_id, hf_ssh_hostkey_ecdsa_curve_id_length);
1472 offset += ssh_tree_add_string(tvb, offset, tree,
1473 hf_ssh_hostkey_ecdsa_q, hf_ssh_hostkey_ecdsa_q_length);
1474 } else if (g_str_has_prefix(key_type, "ssh-ed")(__builtin_constant_p ("ssh-ed")? __extension__ ({ const char
* const __str = (key_type); const char * const __prefix = ("ssh-ed"
); gboolean __result = (0); if (__str == ((void*)0) || __prefix
== ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix
); else { const size_t __str_len = strlen (((__str) + !(__str
))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix
))); if (__str_len >= __prefix_len) __result = memcmp (((__str
) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0
; } __result; }) : (g_str_has_prefix) (key_type, "ssh-ed") )) {
1475 offset += ssh_tree_add_string(tvb, offset, tree,
1476 hf_ssh_hostkey_eddsa_key, hf_ssh_hostkey_eddsa_key_length);
1477 } else {
1478 remaining_len = key_len - (type_len + 4);
1479 proto_tree_add_item(tree, hf_ssh_hostkey_data, tvb, offset, remaining_len, ENC_NA0x00000000);
1480 offset += remaining_len;
1481 }
1482
1483 if (last_offset + (int)key_len != offset) {
1484 expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but hostkey length is %d bytes", offset - last_offset, key_len);
1485 }
1486 return 4+key_len;
1487}
1488
1489static unsigned
1490ssh_tree_add_hostsignature(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *parent_tree,
1491 const char *tree_name, int ett_idx,
1492 struct ssh_flow_data *global_data)
1493{
1494 (void)global_data;
1495 proto_tree *tree = NULL((void*)0);
1496 proto_item* ti = NULL((void*)0);
1497 int last_offset;
1498 int offset0 = offset;
1499 unsigned sig_len, type_len, data_len;
1500 const char* sig_type;
1501 char *tree_title;
1502
1503 last_offset = offset;
1504
1505 sig_len = tvb_get_ntohl(tvb, offset);
1506 offset += 4;
1507
1508 /* Read the signature type before creating the tree so we can append it as info. */
1509 type_len = tvb_get_ntohl(tvb, offset);
1510 offset += 4;
1511 sig_type = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset, type_len, ENC_ASCII0x00000000|ENC_NA0x00000000);
1512
1513 tree_title = wmem_strdup_printf(pinfo->pool, "%s (type: %s)", tree_name, sig_type);
1514 tree = proto_tree_add_subtree(parent_tree, tvb, last_offset, sig_len + 4, ett_idx, NULL((void*)0),
1515 tree_title);
1516
1517 ti = proto_tree_add_uint(tree, hf_ssh_hostsig_length, tvb, last_offset, 4, sig_len);
1518
1519 last_offset += 4;
1520 proto_tree_add_uint(tree, hf_ssh_hostsig_type_length, tvb, last_offset, 4, type_len);
1521 proto_tree_add_string(tree, hf_ssh_hostsig_type, tvb, offset, type_len, sig_type);
1522 offset += type_len;
1523
1524 if (0 == strcmp(sig_type, "ssh-rsa")) {
1525 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostsig_rsa);
1526 } else if (0 == strcmp(sig_type, "ssh-dss")) {
1527 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_hostsig_dsa);
1528// } else if (g_str_has_prefix(sig_type, "ecdsa-sha2-")) {
1529// offset += ssh_tree_add_string(tvb, offset, tree,
1530// hf_ssh_hostkey_ecdsa_curve_id, hf_ssh_hostkey_ecdsa_curve_id_length);
1531// ssh_tree_add_string(tvb, offset, tree,
1532// hf_ssh_hostkey_ecdsa_q, hf_ssh_hostkey_ecdsa_q_length);
1533// } else if (g_str_has_prefix(sig_type, "ssh-ed")) {
1534// ssh_tree_add_string(tvb, offset, tree,
1535// hf_ssh_hostkey_eddsa_key, hf_ssh_hostkey_eddsa_key_length);
1536 } else {
1537 proto_tree_add_item_ret_uint(tree, hf_ssh_hostsig_data_length, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &data_len);
1538 offset += 4;
1539 proto_tree_add_item(tree, hf_ssh_hostsig_data, tvb, offset, data_len, ENC_NA0x00000000);
1540 offset += data_len;
1541 }
1542
1543 if(offset-offset0!=(int)(4+sig_len)){
1544 expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", offset-offset0, sig_len);
1545 }
1546
1547 return 4+sig_len;
1548}
1549
1550static int
1551ssh_dissect_key_exchange(tvbuff_t *tvb, packet_info *pinfo,
1552 struct ssh_flow_data *global_data,
1553 int offset, proto_tree *tree, int is_response,
1554 bool_Bool *need_desegmentation)
1555{
1556 unsigned plen, len;
1557 uint8_t padding_length;
1558 unsigned remain_length;
1559 int last_offset = offset;
1560 unsigned msg_code;
1561
1562 proto_item *ti;
1563 proto_item *key_ex_tree = NULL((void*)0);
1564 const char *key_ex_title = "Key Exchange";
1565
1566 struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
1567
1568 if (PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1569 ws_debug("SSH: SECOND PASS dissecting keys -for Wireshark UI- frame %u", pinfo->num)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 1569, __func__, "SSH: SECOND PASS dissecting keys -for Wireshark UI- frame %u"
, pinfo->num); } } while (0);
1570 }
1571 /* This is after the identification string (Protocol Version Exchange)
1572 * but before the first key exchange has completed, so we expect the SSH
1573 * packets to be unencrypted, and to contain KEX related messages.
1574 *
1575 * XXX - Without the "strict kex" extension, other messages are allowed;
1576 * most don't make sense (SSH_MSG_IGNORE and SSH_MSG_DEBUG might), but we
1577 * could dissect them and add them to the tree.
1578 *
1579 * XXX - Could we combine this with ssh_dissect_decrypted_packet, with a
1580 * flag to indicate whether we're before the initial key exchange?
1581 */
1582
1583 /*
1584 * We use "tvb_ensure_captured_length_remaining()" to make sure there
1585 * actually *is* data remaining.
1586 *
1587 * This means we're guaranteed that "remain_length" is positive.
1588 */
1589 remain_length = tvb_ensure_captured_length_remaining(tvb, offset);
1590 /*
1591 * Can we do reassembly?
1592 */
1593 if (ssh_desegment && pinfo->can_desegment) {
1594 /*
1595 * Yes - would an SSH header starting at this offset
1596 * be split across segment boundaries?
1597 */
1598 if (remain_length < 4) {
1599 /*
1600 * Yes. Tell the TCP dissector where the data for
1601 * this message starts in the data it handed us and
1602 * that we need "some more data." Don't tell it
1603 * exactly how many bytes we need because if/when we
1604 * ask for even more (after the header) that will
1605 * break reassembly.
1606 */
1607 pinfo->desegment_offset = offset;
1608 pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
1609 *need_desegmentation = true1;
1610 return offset;
1611 }
1612 }
1613 plen = tvb_get_ntohl(tvb, offset) ;
1614
1615 if (ssh_desegment && pinfo->can_desegment) {
1616 if (plen +4 > remain_length) {
1617 pinfo->desegment_offset = offset;
1618 pinfo->desegment_len = plen+4 - remain_length;
1619 *need_desegmentation = true1;
1620 return offset;
1621 }
1622 }
1623 /*
1624 * Need to check plen > 0x80000000 here
1625 */
1626
1627 ti = proto_tree_add_uint(tree, hf_ssh_packet_length, tvb,
1628 offset, 4, plen);
1629 if (plen >= SSH_MAX_PACKET_LEN32768) {
1630 expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Overly large number %d", plen);
1631 plen = remain_length-4;
1632
1633 /* XXX - Mark as Continuation Data and return without incrementing?
1634 * Or do so *before* using this length to desegment? */
1635 }
1636 offset+=4;
1637
1638 ssh_packet_info_t *packet = ssh_get_packet_info(pinfo, is_response);
1639
1640 int record_id = tvb_raw_offset(tvb)+offset;
1641 ssh_message_info_t *message;
1642 message = ssh_get_message(pinfo, record_id);
1643 if (!message) {
1644 message = wmem_new0(wmem_file_scope(), ssh_message_info_t)((ssh_message_info_t*)wmem_alloc0((wmem_file_scope()), sizeof
(ssh_message_info_t)));
1645 message->sequence_number = peer_data->sequence_number++;
1646 message->id = record_id;
1647 /* No data, and no MAC, as is this is before encryption starts. */
1648 message->next = NULL((void*)0);
1649 ssh_debug_printf("%s->sequence_number++ > %d\n", is_response?"server":"client", peer_data->sequence_number);
1650
1651 ssh_message_info_t **pmessage = &packet->messages;
1652 while(*pmessage){
1653 pmessage = &(*pmessage)->next;
1654 }
1655 *pmessage = message;
1656 }
1657
1658 /* padding length */
1659 padding_length = tvb_get_uint8(tvb, offset);
1660 proto_tree_add_uint(tree, hf_ssh_padding_length, tvb, offset, 1, padding_length);
1661 offset += 1;
1662
1663 if (global_data->kex)
1664 key_ex_title = wmem_strdup_printf(pinfo->pool, "%s (method:%s)", key_ex_title, global_data->kex);
1665 key_ex_tree = proto_tree_add_subtree(tree, tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), key_ex_title);
1666
1667 /* msg_code */
1668 msg_code = tvb_get_uint8(tvb, offset);
1669
1670 if (msg_code >= 30 && msg_code < 40) {
1671 offset = global_data->kex_specific_dissector(msg_code, tvb, pinfo,
1672 offset, key_ex_tree, global_data);
1673 } else {
1674 proto_tree_add_item(key_ex_tree, hf_ssh2_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1675 offset += 1;
1676
1677 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1678 val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
1679
1680 /* 16 bytes cookie */
1681 switch(msg_code)
1682 {
1683 case SSH_MSG_KEXINIT20:
1684 offset = ssh_dissect_key_init(tvb, pinfo, offset, key_ex_tree, is_response, global_data);
1685 if ((peer_data->frame_key_start == 0) && (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))) {
1686 peer_data->frame_key_start = pinfo->num;
1687 }
1688 break;
1689 case SSH_MSG_NEWKEYS21:
1690 if (peer_data->frame_key_end == 0) {
1691 peer_data->frame_key_end = pinfo->num;
1692 peer_data->frame_key_end_offset = offset;
1693
1694 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1695 /* "After sending or receiving a SSH2_MSG_NEWKEYS message,
1696 * reset the packet sequence number to zero. This behaviour
1697 * persists for the duration of the connection (i.e. not
1698 * just the first SSH2_MSG_NEWKEYS) */
1699 if (global_data->ext_kex_strict) {
1700 peer_data->sequence_number = 0;
1701 ssh_debug_printf("%s->sequence_number reset to 0 (Strict KEX)\n", is_response?"server":"client");
1702 }
1703 }
1704
1705 // the client sent SSH_MSG_NEWKEYS
1706 if (!is_response) {
1707 ssh_debug_printf("Activating new keys for CLIENT => SERVER\n");
1708 ssh_decryption_setup_cipher(&global_data->peer_data[CLIENT_PEER_DATA0], &global_data->new_keys[0], &global_data->new_keys[2]);
1709 ssh_decryption_setup_mac(&global_data->peer_data[CLIENT_PEER_DATA0], &global_data->new_keys[4]);
1710 }else{
1711 ssh_debug_printf("Activating new keys for SERVER => CLIENT\n");
1712 ssh_decryption_setup_cipher(&global_data->peer_data[SERVER_PEER_DATA1], &global_data->new_keys[1], &global_data->new_keys[3]);
1713 ssh_decryption_setup_mac(&global_data->peer_data[SERVER_PEER_DATA1], &global_data->new_keys[5]);
1714 }
1715 }
1716 break;
1717 }
1718 }
1719
1720 len = plen+4-padding_length-(offset-last_offset);
1721 if (len > 0) {
1722 proto_tree_add_item(key_ex_tree, hf_ssh_payload, tvb, offset, len, ENC_NA0x00000000);
1723 }
1724 offset += len;
1725
1726 /* padding */
1727 proto_tree_add_item(tree, hf_ssh_padding_string, tvb, offset, padding_length, ENC_NA0x00000000);
1728 offset+= padding_length;
1729 ti = proto_tree_add_uint(tree, hf_ssh_seq_num, tvb, offset, 0, message->sequence_number);
1730 proto_item_set_generated(ti);
1731
1732 return offset;
1733}
1734
1735static int ssh_dissect_kex_dh(uint8_t msg_code, tvbuff_t *tvb,
1736 packet_info *pinfo, int offset, proto_tree *tree,
1737 struct ssh_flow_data *global_data)
1738{
1739 proto_tree_add_item(tree, hf_ssh2_kex_dh_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1740 offset += 1;
1741
1742 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1743 val_to_str(pinfo->pool, msg_code, ssh2_kex_dh_msg_vals, "Unknown (%u)"));
1744
1745 switch (msg_code) {
1746 case SSH_MSG_KEXDH_INIT30:
1747 // e (client ephemeral key public part)
1748 if (!ssh_read_e(tvb, offset, global_data)) {
1749 proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1750 "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1751 }
1752
1753 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_e);
1754 break;
1755
1756 case SSH_MSG_KEXDH_REPLY31:
1757 offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key",
1758 ett_key_exchange_host_key, global_data);
1759
1760 // f (server ephemeral key public part), K_S (host key)
1761 if (!ssh_read_f(tvb, offset, global_data)) {
1762 proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1763 "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1764 }
1765 ssh_choose_enc_mac(global_data);
1766 ssh_keylog_hash_write_secret(global_data, pinfo->pool);
1767
1768 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_f);
1769 offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
1770 ett_key_exchange_host_sig, global_data);
1771 break;
1772 }
1773
1774 return offset;
1775}
1776
1777static int ssh_dissect_kex_dh_gex(uint8_t msg_code, tvbuff_t *tvb,
1778 packet_info *pinfo, int offset, proto_tree *tree,
1779 struct ssh_flow_data *global_data)
1780{
1781 proto_tree_add_item(tree, hf_ssh2_kex_dh_gex_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1782 offset += 1;
1783
1784 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1785 val_to_str(pinfo->pool, msg_code, ssh2_kex_dh_gex_msg_vals, "Unknown (%u)"));
1786
1787 switch (msg_code) {
1788 case SSH_MSG_KEX_DH_GEX_REQUEST_OLD30:
1789 proto_tree_add_item(tree, hf_ssh_dh_gex_nbits, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1790 offset += 4;
1791 break;
1792
1793 case SSH_MSG_KEX_DH_GEX_GROUP31:
1794 // p (Group modulo)
1795 global_data->kex_gex_p = ssh_read_mpint(tvb, offset);
1796 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_gex_p);
1797 // g (Group generator)
1798 global_data->kex_gex_g = ssh_read_mpint(tvb, offset);
1799 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_gex_g);
1800 break;
1801
1802 case SSH_MSG_KEX_DH_GEX_INIT32:
1803 // e (Client public key)
1804 if (!ssh_read_e(tvb, offset, global_data)) {
1805 proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1806 "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1807 }
1808 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_e);
1809 break;
1810
1811 case SSH_MSG_KEX_DH_GEX_REPLY33:
1812 offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key",
1813 ett_key_exchange_host_key, global_data);
1814 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1815 ssh_read_f(tvb, offset, global_data);
1816 // f (server ephemeral key public part), K_S (host key)
1817 ssh_choose_enc_mac(global_data);
1818 ssh_keylog_hash_write_secret(global_data, pinfo->pool);
1819 }
1820 offset += ssh_tree_add_mpint(tvb, offset, tree, hf_ssh_dh_f);
1821 offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
1822 ett_key_exchange_host_sig, global_data);
1823 break;
1824
1825 case SSH_MSG_KEX_DH_GEX_REQUEST34:{
1826
1827 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1828 ssh_hash_buffer_put_uint32(global_data->kex_gex_bits_min, tvb_get_ntohl(tvb, offset));
1829 }
1830 proto_tree_add_item(tree, hf_ssh_dh_gex_min, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1831 offset += 4;
1832 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1833 ssh_hash_buffer_put_uint32(global_data->kex_gex_bits_req, tvb_get_ntohl(tvb, offset));
1834 }
1835 proto_tree_add_item(tree, hf_ssh_dh_gex_nbits, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1836 offset += 4;
1837 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1838 ssh_hash_buffer_put_uint32(global_data->kex_gex_bits_max, tvb_get_ntohl(tvb, offset));
1839 }
1840 proto_tree_add_item(tree, hf_ssh_dh_gex_max, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
1841 offset += 4;
1842 break;
1843 }
1844 }
1845
1846 return offset;
1847}
1848
1849static int
1850ssh_dissect_kex_ecdh(uint8_t msg_code, tvbuff_t *tvb,
1851 packet_info *pinfo, int offset, proto_tree *tree,
1852 struct ssh_flow_data *global_data)
1853{
1854 proto_tree_add_item(tree, hf_ssh2_kex_ecdh_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1855 offset += 1;
1856
1857 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1858 val_to_str(pinfo->pool, msg_code, ssh2_kex_ecdh_msg_vals, "Unknown (%u)"));
1859
1860 switch (msg_code) {
1861 case SSH_MSG_KEX_ECDH_INIT30:
1862 if (!ssh_read_e(tvb, offset, global_data)) {
1863 proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1864 "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1865 }
1866
1867 offset += ssh_tree_add_string(tvb, offset, tree, hf_ssh_ecdh_q_c, hf_ssh_ecdh_q_c_length);
1868 break;
1869
1870 case SSH_MSG_KEX_ECDH_REPLY31:
1871 offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key",
1872 ett_key_exchange_host_key, global_data);
1873
1874 if (!ssh_read_f(tvb, offset, global_data)){
1875 proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 2,
1876 "Invalid key length: %u", tvb_get_ntohl(tvb, offset));
1877 }
1878
1879 ssh_choose_enc_mac(global_data);
1880 ssh_keylog_hash_write_secret(global_data, pinfo->pool);
1881
1882 offset += ssh_tree_add_string(tvb, offset, tree, hf_ssh_ecdh_q_s, hf_ssh_ecdh_q_s_length);
1883 offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
1884 ett_key_exchange_host_sig, global_data);
1885 break;
1886 }
1887
1888 return offset;
1889}
1890
1891 /*
1892 * === Hybrid KEX Dissection Strategy for Post-Quantum algorithms ===
1893 *
1894 * This 3 functions:
1895 *
1896 * - ssh_dissect_kex_pq_hybrid()
1897 * - ssh_read_e_pq()
1898 * - ssh_read_f_pq()
1899 *
1900 * handles the dissection of server key exchange payloads for the
1901 * post-quantum hybrid key exchange method:
1902 * - sntrup761x25519-sha512
1903 * - mlkem768x25519-sha256
1904 * - mlkem768nistp256-sha256
1905 * - mlkem1024nistp384-sha384
1906 *
1907 * /!\ Rationale for implementation approach:
1908 *
1909 * SSH encodes the server's ephemeral key (`Q_S`) as a single SSH `string`
1910 * which contains both the post-quantum KEM ciphertext (from sntrup761 / mlkem768
1911 * / mlkem1024) and the traditional (Curve25519 / nistp256 / nistp384) public key.
1912 * Therefore, we parse one string
1913 *
1914 * sntrup761x25519:
1915 * - PQ client keyshare: 1158 bytes
1916 * - PQ server ciphertext: 1039 bytes
1917 * - Curve25519 pubkey: 32 bytes
1918 *
1919 * mlkem768x25519:
1920 * - PQ client keyshare: 1184 bytes
1921 * - PQ server ciphertext: 1088 bytes
1922 * - Curve25519 pubkey: 32 bytes
1923 *
1924 * mlkem768nistp256:
1925 * - PQ client keyshare: 1184 bytes
1926 * - PQ server ciphertext: 1088 bytes
1927 * - nistp256 pubkey: 65 bytes
1928 *
1929 * mlkem1024nistp384:
1930 * - PQ client keyshare: 1568 bytes
1931 * - PQ server ciphertext: 1568 bytes
1932 * - nistp384 pubkey: 97 bytes
1933 *
1934 * OpenSSH uses `[email protected]` as an (old) alias for `sntrup761x25519-sha512`
1935 *
1936 * This matches how OpenSSH serializes the hybrid key material, and allows Wireshark
1937 * to compute the correct key exchange hash and derive session keys accurately.
1938 *
1939 * /!\ This design is necessary for live decryption support in Wireshark and TShark.
1940 *
1941 * References:
1942 * - RFC 4253: The SSH Transport Layer Protocol
1943 * - Section 6: string encoding format
1944 * - Section 7.2: Key derivation
1945 * - RFC 8731: Secure Shell (SSH) Key Exchange Method using Curve25519
1946 * - Internet-Draft on sntrup761x25519-sha512
1947 * - https://datatracker.ietf.org/doc/draft-ietf-sshm-ntruprime-ssh/
1948 * - Internet-Draft on mlkem768x25519-sha256
1949 * - https://datatracker.ietf.org/doc/draft-ietf-sshm-mlkem-hybrid-kex/
1950 * - OpenSSH Hybrid KEM Implementation (sntrup761x25519-sha512 / mlkem768x25519-sha256)
1951 * - https://github.com/openssh/openssh-portable/blob/master/kexc25519.c
1952 * - https://github.com/openssh/openssh-portable/blob/master/kexsntrup761x25519.c
1953 * - https://github.com/openssh/openssh-portable/blob/master/kexmlkem768x25519.c
1954 * - AsyncSSH Hybrid KEM Implementation (sntrup761x25519-sha512 / mlkem768x25519-sha256 / mlkem768nistp256-sha256 / mlkem1024nistp384-sha384)
1955 * - https://github.com/ronf/asyncssh/blob/develop/asyncssh/kex_dh.py
1956 *
1957 */
1958
1959static int
1960ssh_dissect_kex_pq_hybrid(uint8_t msg_code, tvbuff_t *tvb,
1961 packet_info *pinfo, int offset, proto_tree *tree,
1962 struct ssh_flow_data *global_data)
1963{
1964 // SSH PACKET STRUCTURE RFC4253 (e.g. packet of 1228 bytes payload)
1965 // [00 00 04 cc] → ssh payload blob length field in tcp packet (e.g. 1228=0x04cc): 4 bytes
1966 // [1228 bytes of SSH PAYLOAD BLOB] → ssh payload blob field: 1228 bytes
1967
1968 // Add the message code byte (first field in packet) to the GUI tree.
1969 proto_tree_add_item(tree, hf_ssh2_kex_hybrid_msg_code, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
1970 offset += 1; // Move offset past the msg_code byte.
1971
1972 // Add a descriptive string to Wireshark's "Info" column.
1973 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0),
1974 val_to_str(pinfo->pool, msg_code, ssh2_kex_hybrid_msg_vals, "Unknown (%u)"));
1975
1976 const char *kex_name = global_data->kex;
1977
1978 if (msg_code == SSH_MSG_KEX_HYBRID_INIT30) {
1
Assuming 'msg_code' is not equal to SSH_MSG_KEX_HYBRID_INIT
→
2
←
Taking false branch
→
1979 // Print warning when PQ hybrid KEM is detected in KEX
1980 // This implementation currently rely on SHARED_SECRET only and do not work with PRIVATE_KEY
1981 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1982 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"
, 1982, __func__, "POST-QUANTUM KEX_HYBRID detected: KEX = %s"
, kex_name); } } while (0);
1983 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"
, 1983, __func__, "SHARED_SECRET decryption is supported - PRIVATE_KEY decryption is not supported"
); } } while (0);
1984 }
1985 // Print noisy debug info
1986 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"
, 1986, __func__, ">>> HYBRID KEM: msg_code = %u, offset = %d, kex = %s"
, msg_code, offset, kex_name); } } while (0);
1987 }
1988
1989 switch (msg_code) {
3
←
Control jumps to 'case 31:' at line 2076
→
1990
1991 // Client Key Exchange INIT
1992 case SSH_MSG_KEX_HYBRID_INIT30: {
1993
1994 // SNTRUP761X25519: RFC4253 SSH "string" (binary-encoded structure)
1995 // [00 00 04 a6] → length = 1190 (0x04a6)
1996 // [1158 bytes PQ blob] → sntrup761 encapsulated client key
1997 // [32 bytes of X25519 pubkey] → ephemeral X25519 public key
1998
1999 // MLKEM768X25519: RFC4253 SSH "string" (binary-encoded structure)
2000 // [00 00 04 c0] → length = 1216 (0x04c0)
2001 // [1184 bytes PQ blob] → mlkem768 encapsulated client key
2002 // [32 bytes of X25519 pubkey] → ephemeral X25519 public key
2003
2004 // MLKEM768NISTP256: RFC4253 SSH "string" (binary-encoded structure)
2005 // [00 00 04 e1] → length = 1249 (0x04e1)
2006 // [1184 bytes PQ blob] → mlkem768 encapsulated client key
2007 // [65 bytes of nistp256 pubkey] → ephemeral nistp256 public key
2008
2009 // MLKEM1024NISTP384: RFC4253 SSH "string" (binary-encoded structure)
2010 // [00 00 06 81] → length = 1665 (0x0681)
2011 // [1568 bytes PQ blob] → mlkem1024 encapsulated client key
2012 // [97 bytes of nistp384 pubkey] → ephemeral nistp384 public key
2013
2014 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"
, 2014, __func__, "CLIENT INIT follow offset pointer - absolute offset: %d"
, offset); } } while (0); // debug trace offset
2015 int new_offset_client = ssh_read_e_pq(tvb, offset, global_data);
2016 if (new_offset_client < 0) {
2017 uint32_t bad_len = tvb_get_ntohl(tvb, offset);
2018 proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 4,
2019 "Invalid PQ client key length: %u", bad_len);
2020 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"
, 2020, __func__, "ExpertInfo: Invalid PQ client key length at offset %d: %u"
, offset, bad_len); } } while (0);
2021
2022 return offset + 4;
2023 }
2024
2025 // PQ-hybrid KEMs cannot use ssh_add_tree_string => manual dissection
2026 // Get PQ blob size
2027 proto_tree *pq_tree = NULL((void*)0);
2028 uint32_t hybrid_len;
2029
2030 // Add a subtree for dissecting PQ blob
2031 proto_tree_add_item_ret_uint(tree, hf_ssh_hybrid_blob_client_len, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &hybrid_len); // add blob length
2032 ws_debug("CLIENT INIT PQ blob length - pq_len: %d", hybrid_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 2032, __func__, "CLIENT INIT PQ blob length - pq_len: %d", hybrid_len
); } } while (0); // debug trace pq_len
2033 offset += 4; // shift length field
2034 pq_tree = proto_tree_add_subtree(tree, tvb, offset, hybrid_len, ett_ssh_pqhybrid_client, NULL((void*)0), "Hybrid Key Exchange Blob Client");
2035 ws_debug("CLIENT INIT add PQ Hybrid subtree - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 2035, __func__, "CLIENT INIT add PQ Hybrid subtree - offset: %d"
, offset); } } while (0); // debug trace offset
2036
2037 // Make a new tvb for just the PQ hybrid blob string contents
2038 tvbuff_t *string_tvb = tvb_new_subset_length(tvb, offset, hybrid_len);
2039
2040 uint32_t pq_len;
2041 uint32_t t_len;
2042 if (g_str_has_prefix(kex_name, "sntrup761x25519-sha512")(__builtin_constant_p ("sntrup761x25519-sha512")? __extension__
({ const char * const __str = (kex_name); const char * const
__prefix = ("sntrup761x25519-sha512"); 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, "sntrup761x25519-sha512") )) {
2043 pq_len = 1158;
2044 t_len = 32;
2045 } else if (strcmp(kex_name, "mlkem768x25519-sha256") == 0) {
2046 pq_len = 1184;
2047 t_len = 32;
2048 } else if (strcmp(kex_name, "mlkem768nistp256-sha256") == 0) {
2049 pq_len = 1184;
2050 t_len = 65;
2051 } else if (strcmp(kex_name, "mlkem1024nistp384-sha384") == 0) {
2052 pq_len = 1568;
2053 t_len = 97;
2054 } else {
2055 DISSECTOR_ASSERT_NOT_REACHED()(proto_report_dissector_bug("%s:%u: failed assertion \"DISSECTOR_ASSERT_NOT_REACHED\""
, "epan/dissectors/packet-ssh.c", 2055));
2056 break;
2057 }
2058
2059 if (pq_len + t_len != hybrid_len) {
2060 proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 4,
2061 "Invalid PQ hybrid client key length for %s: %u does not match %u + %u",
2062 kex_name, hybrid_len, pq_len, t_len);
2063 } else {
2064 // Now dissect string inside the blob and add PQ server response and ECDH Q_S to GUI subtree
2065 proto_tree_add_item(pq_tree, hf_ssh_pq_kem_client, string_tvb, 0, pq_len, ENC_NA0x00000000);
2066 proto_tree_add_item(pq_tree, hf_ssh_ecdh_q_c, string_tvb, pq_len, t_len, ENC_NA0x00000000);
2067 }
2068
2069 // retrieve offset from read_f_pq() to shift blob length and consume packet
2070 offset = new_offset_client;
2071 ws_debug("CLIENT INIT shift PQ blob - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 2071, __func__, "CLIENT INIT shift PQ blob - offset: %d", offset
); } } while (0); // debug trace offset
2072 break;
2073 }
2074
2075 // Server Reply Message
2076 case SSH_MSG_KEX_HYBRID_REPLY31: {
2077
2078 // SNTRUP761X25519: RFC4253 SSH "string" (binary-encoded structure)
2079 // [00 00 00 33] → host key structure length = 51
2080 // [00 00 00 0b] → host key alg length = 11
2081 // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2082 // [00 00 00 20] → host key length = 32
2083 // [32 bytes of public key] → public key
2084 // [00 00 04 2f] → PQ blob length = 1071 (0x042f)
2085 // [1071 bytes PQ blob] → PQ blob (1039 sntrup761 + 32 x25519)
2086 // [00 00 00 53] → signature structure length = 83
2087 // [00 00 00 0b] → signature alg length
2088 // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2089 // [00 00 00 40] → signature length
2090 // [40 bytes signature] → server signature
2091
2092 // MLKEM768X25519: RFC4253 SSH "string" (binary-encoded structure)
2093 // [00 00 00 33] → host key structure length = 51
2094 // [00 00 00 0b] → host key alg length = 11
2095 // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2096 // [00 00 00 20] → host key length = 32
2097 // [32 bytes of public key] → public key
2098 // [00 00 04 60] → PQ blob length = 1120 (0x0460)
2099 // [1120 bytes PQ blob] → PQ blob (1088 mlkem768 + 32 x25519)
2100 // [00 00 00 53] → signature structure length = 83
2101 // [00 00 00 0b] → signature alg length
2102 // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2103 // [00 00 00 40] → signature length
2104 // [40 bytes signature] → server signature
2105
2106 // MLKEM768NISTP256: RFC4253 SSH "string" (binary-encoded structure)
2107 // [00 00 00 33] → host key structure length = 51
2108 // [00 00 00 0b] → host key alg length = 11
2109 // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2110 // [00 00 00 20] → host key length = 32
2111 // [32 bytes of public key] → public key
2112 // [00 00 04 81] → PQ blob length = 1153 (0x0481)
2113 // [1153 bytes PQ blob] → PQ blob (1088 mlkem768 + 65 nistp256)
2114 // [00 00 00 53] → signature structure length = 83
2115 // [00 00 00 0b] → signature alg length
2116 // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2117 // [00 00 00 40] → signature length
2118 // [40 bytes signature] → server signature
2119
2120 // MLKEM1024NISTP384: RFC4253 SSH "string" (binary-encoded structure)
2121 // [00 00 00 33] → host key structure length = 51
2122 // [00 00 00 0b] → host key alg length = 11
2123 // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2124 // [00 00 00 20] → host key length = 32
2125 // [32 bytes of public key] → public key
2126 // [00 00 06 81] → PQ blob length = 1665 (0x0681)
2127 // [1665 bytes PQ blob] → PQ blob (1568 mlkem1024 + 97 nistp384)
2128 // [00 00 00 53] → signature structure length = 83
2129 // [00 00 00 0b] → signature alg length
2130 // [73 73 68 2d 65 64 32 35 35 31 39] → "ssh-ed25519"
2131 // [00 00 00 40] → signature length
2132 // [40 bytes signature] → server signature
2133
2134 ws_debug("SERVER REPLY follow offset pointer - absolute offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 2134, __func__, "SERVER REPLY follow offset pointer - absolute offset: %d"
, offset); } } while (0); // debug trace offset
4
←
Taking true branch
→
5
←
Loop condition is false. Exiting loop
→
2135
2136 // Add the host key used to sign the key exchange to the GUI tree.
2137 offset += ssh_tree_add_hostkey(tvb, pinfo, offset, tree, "KEX host key", ett_key_exchange_host_key, global_data);
2138
2139 ws_debug("SERVER REPLY add hostkey tree - offset: %d", offset)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 2139, __func__, "SERVER REPLY add hostkey tree - offset: %d"
, offset); } } while (0); // debug trace offset
6
←
Taking true branch
→
7
←
Loop condition is false. Exiting loop
→
2140
2141 int new_offset_server = ssh_read_f_pq(tvb, offset, global_data);
2142 if (new_offset_server
7.1
'new_offset_server' is >= 0
 < 0) {
8
←
Taking false branch
→
2143 uint32_t bad_len = tvb_get_ntohl(tvb, offset);
2144 proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 4,
2145 "Invalid PQ server key length: %u", bad_len);
2146 ws_debug("ExpertInfo: Invalid PQ server key length at offset %d: %u", offset, bad_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 2146, __func__, "ExpertInfo: Invalid PQ server key length at offset %d: %u"
, offset, bad_len); } } while (0);
2147
2148 return offset + 4;
2149 }
2150
2151 // Select encryption and MAC based on negotiated algorithms.
2152 ssh_choose_enc_mac(global_data);
2153
2154 // Write session secrets to keylog file (if enabled).
2155 ssh_keylog_hash_write_secret(global_data, pinfo->pool);
9
←
Calling 'ssh_keylog_hash_write_secret'
→
2156
2157 // PQ-hybrid KEMs cannot use ssh_add_tree_string => manual dissection
2158 // Get PQ blob size
2159 proto_tree *pq_tree = NULL((void*)0);
2160 uint32_t hybrid_len = tvb_get_ntohl(tvb, offset);
2161 ws_debug("SERVER REPLY PQ blob length - hybrid_len: %d", hybrid_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 2161, __func__, "SERVER REPLY PQ blob length - hybrid_len: %d"
, hybrid_len); } } while (0); // debug trace hybrid_len
2162
2163 // Add a subtree for dissecting PQ blob
2164 proto_tree_add_item(tree, hf_ssh_hybrid_blob_server_len, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000); // add blob length
2165 offset += 4; // shift length field
2166 pq_tree = proto_tree_add_subtree(tree, tvb, offset, hybrid_len, ett_ssh_pqhybrid_server, NULL((void*)0), "Hybrid Key Exchange Blob Server");
2167 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"
, 2167, __func__, "SERVER REPLY add PQ Hybrid subtree - offset: %d"
, offset); } } while (0); // debug trace offset
2168
2169 // Make a new tvb for just the PQ hybrid blob string contents
2170 tvbuff_t *string_tvb = tvb_new_subset_length(tvb, offset, hybrid_len);
2171
2172 uint32_t pq_len;
2173 uint32_t t_len;
2174 if (g_str_has_prefix(kex_name, "sntrup761x25519-sha512")(__builtin_constant_p ("sntrup761x25519-sha512")? __extension__
({ const char * const __str = (kex_name); const char * const
__prefix = ("sntrup761x25519-sha512"); 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, "sntrup761x25519-sha512") )) {
2175 pq_len = 1039;
2176 t_len = 32;
2177 } else if (strcmp(kex_name, "mlkem768x25519-sha256") == 0) {
2178 pq_len = 1088;
2179 t_len = 32;
2180 } else if (strcmp(kex_name, "mlkem768nistp256-sha256") == 0) {
2181 pq_len = 1088;
2182 t_len = 65;
2183 } else if (strcmp(kex_name, "mlkem1024nistp384-sha384") == 0) {
2184 pq_len = 1568;
2185 t_len = 97;
2186 } else {
2187 DISSECTOR_ASSERT_NOT_REACHED()(proto_report_dissector_bug("%s:%u: failed assertion \"DISSECTOR_ASSERT_NOT_REACHED\""
, "epan/dissectors/packet-ssh.c", 2187));
2188 break;
2189 }
2190
2191 if (pq_len + t_len != hybrid_len) {
2192 proto_tree_add_expert_format(tree, pinfo, &ei_ssh_invalid_keylen, tvb, offset, 4,
2193 "Invalid PQ hybrid server key length for %s: %u does not match %u + %u",
2194 kex_name, hybrid_len, pq_len, t_len);
2195 } else {
2196 // Now dissect string inside the blob and add PQ server response and ECDH Q_S to GUI subtree
2197 proto_tree_add_item(pq_tree, hf_ssh_pq_kem_server, string_tvb, 0, pq_len, ENC_NA0x00000000);
2198 proto_tree_add_item(pq_tree, hf_ssh_ecdh_q_s, string_tvb, pq_len, t_len, ENC_NA0x00000000);
2199 }
2200
2201 // retrieve offset from read_f_pq() to shift blob length
2202 offset = new_offset_server;
2203 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"
, 2203, __func__, "SERVER REPLY shift PQ blob - offset: %d", offset
); } } while (0); // debug trace offset
2204
2205 // Add the host's digital signature to the GUI tree
2206 offset += ssh_tree_add_hostsignature(tvb, pinfo, offset, tree, "KEX host signature",
2207 ett_key_exchange_host_sig, global_data);
2208 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"
, 2208, __func__, "SERVER REPLY add signature tree - offset: %d"
, offset); } } while (0); // debug trace offset
2209 break;
2210 }
2211 }
2212
2213 if (msg_code == SSH_MSG_KEX_HYBRID_INIT30) {
2214 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"
, 2214, __func__, "OUT PQ HYBRID KEX - CLIENT INIT track offset: %d"
, offset); } } while (0); // debug trace offset
2215 } else if (msg_code == SSH_MSG_KEX_HYBRID_REPLY31) {
2216 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"
, 2216, __func__, "OUT PQ HYBRID KEX - SERVER REPLY track offset: %d"
, offset); } } while (0); // debug trace offset
2217 } else {
2218 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"
, 2218, __func__, "OUT PQ HYBRID KEX - track offset: %d", offset
); } } while (0); // debug trace offset
2219 }
2220
2221 return offset; // Final offset after packet is processed by ssh_dissect_kex_pq_hybrid()
2222}
2223
2224static ssh_message_info_t*
2225ssh_get_message(packet_info *pinfo, int record_id)
2226{
2227 ssh_packet_info_t *packet = (ssh_packet_info_t *)p_get_proto_data(
2228 wmem_file_scope(), pinfo, proto_ssh, 0);
2229
2230 if (!packet) {
2231 return NULL((void*)0);
2232 }
2233
2234 ssh_message_info_t *message = NULL((void*)0);
2235 for (message = packet->messages; message; message = message->next) {
2236 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"
, 2236, __func__, "%u:looking for message %d now %d", pinfo->
num, record_id, message->id); } } while (0);
2237 if (message->id == record_id) {
2238 return message;
2239 }
2240 }
2241
2242 return NULL((void*)0);
2243}
2244
2245static int
2246ssh_try_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
2247 struct ssh_peer_data *peer_data, int offset, proto_tree *tree)
2248{
2249 bool_Bool can_decrypt = peer_data->cipher != NULL((void*)0) || peer_data->cipher_id == CIPHER_NULL0x00080000;
2250 ssh_message_info_t *message = NULL((void*)0);
2251
2252 if (can_decrypt) {
2253 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2254 ssh_decrypt_packet(tvb, pinfo, peer_data, offset);
2255 if (pinfo->desegment_len) {
2256 return offset;
2257 }
2258 }
2259
2260 int record_id = tvb_raw_offset(tvb) + offset;
2261 message = ssh_get_message(pinfo, record_id);
2262
2263 if (message) {
2264 offset += ssh_dissect_decrypted_packet(tvb_new_subset_remaining(tvb, offset), pinfo, peer_data, tree, message);
2265 return offset;
2266 }
2267 }
2268
2269 return ssh_dissect_encrypted_packet(tvb, pinfo, peer_data, offset, tree);
2270}
2271
2272static int
2273ssh_dissect_encrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
2274 struct ssh_peer_data *peer_data,
2275 int offset, proto_tree *tree)
2276{
2277 int len;
2278 unsigned plen;
2279
2280 len = tvb_reported_length_remaining(tvb, offset);
2281 col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Encrypted packet (len=%d)", len);
2282
2283 if (tree) {
2284 int encrypted_len = len;
2285
2286 if (len > 4 && peer_data->length_is_plaintext) {
2287 plen = tvb_get_ntohl(tvb, offset) ;
2288 proto_tree_add_uint(tree, hf_ssh_packet_length, tvb, offset, 4, plen);
2289 encrypted_len -= 4;
2290 }
2291 else if (len > 4) {
2292 proto_tree_add_item(tree, hf_ssh_packet_length_encrypted, tvb, offset, 4, ENC_NA0x00000000);
2293 encrypted_len -= 4;
2294 }
2295
2296 if (peer_data->mac_length>0)
2297 encrypted_len -= peer_data->mac_length;
2298
2299 proto_tree_add_item(tree, hf_ssh_encrypted_packet,
2300 tvb, offset+4, encrypted_len, ENC_NA0x00000000);
2301
2302 if (peer_data->mac_length>0)
2303 proto_tree_add_item(tree, hf_ssh_mac_string,
2304 tvb, offset+4+encrypted_len,
2305 peer_data->mac_length, ENC_NA0x00000000);
2306 }
2307 offset += len;
2308 return offset;
2309}
2310
2311static int
2312ssh_dissect_protocol(tvbuff_t *tvb, packet_info *pinfo,
2313 struct ssh_flow_data *global_data,
2314 unsigned offset, proto_tree *tree, int is_response, unsigned * version,
2315 bool_Bool *need_desegmentation)
2316{
2317 unsigned protolen, next_offset;
2318
2319 /*
2320 * If the first packet do not contain the banner,
2321 * it is dump in the middle of a flow or not a ssh at all
2322 */
2323 if (tvb_strncaseeql(tvb, offset, "SSH-", 4) != 0) {
2324 offset = ssh_dissect_encrypted_packet(tvb, pinfo,
2325 &global_data->peer_data[is_response], offset, tree);
2326 return offset;
2327 }
2328
2329 if (!is_response) {
2330 if (tvb_strncaseeql(tvb, offset, "SSH-2.", 6) == 0) {
2331 *(version) = SSH_VERSION_22;
2332 } else if (tvb_strncaseeql(tvb, offset, "SSH-1.99-", 9) == 0) {
2333 *(version) = SSH_VERSION_22;
2334 } else if (tvb_strncaseeql(tvb, offset, "SSH-1.", 6) == 0) {
2335 *(version) = SSH_VERSION_11;
2336 }
2337 }
2338
2339 if (!tvb_find_line_end_remaining(tvb, offset, &protolen, &next_offset)) {
2340 if (ssh_desegment && pinfo->can_desegment) {
2341 pinfo->desegment_offset = offset;
2342 pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
2343 *need_desegmentation = true1;
2344 return offset;
2345 }
2346 }
2347 /* Either we found it, or we're not reassembling and take everything. */
2348
2349 col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Protocol (%s)",
2350 tvb_format_text(pinfo->pool, tvb, offset, protolen));
2351
2352 // V_C / V_S (client and server identification strings) RFC4253 4.2
2353 // format: SSH-protoversion-softwareversion SP comments [CR LF not incl.]
2354 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2355 uint8_t *data = (uint8_t *)tvb_memdup(pinfo->pool, tvb, offset, protolen);
2356 if(!is_response){
2357 ssh_hash_buffer_put_string(global_data->kex_client_version, data, protolen);
2358 }else{
2359 ssh_hash_buffer_put_string(global_data->kex_server_version, data, protolen);
2360 }
2361 }
2362
2363 proto_tree_add_item(tree, hf_ssh_protocol,
2364 tvb, offset, protolen, ENC_ASCII0x00000000);
2365 offset += next_offset;
2366 return offset;
2367}
2368
2369static void
2370ssh_set_mac_length(struct ssh_peer_data *peer_data)
2371{
2372 char *size_str;
2373 uint32_t size = 0;
2374 char *mac_name = peer_data->mac;
2375 char *strip;
2376
2377 if (!mac_name)
2378 return;
2379
2380 /* wmem_strdup() never returns NULL */
2381 mac_name = wmem_strdup(NULL((void*)0), (const char *)mac_name);
2382
2383 /* strip trailing "[email protected]" or "@openssh.com" */
2384 strip = strstr(mac_name, "[email protected]");
2385 if (strip) {
2386 peer_data->length_is_plaintext = 1;
2387 *strip = '\0';
2388 }
2389 else {
2390 strip = strstr(mac_name, "@openssh.com");
2391 if (strip) *strip = '\0';
2392 }
2393
2394 size_str = g_strrstr(mac_name, "-");
2395 if (size_str && ws_strtou32(size_str + 1, NULL((void*)0), &size) && size > 0 && size % 8 == 0) {
2396 peer_data->mac_length = size / 8;
2397 }
2398 else if (strcmp(mac_name, "hmac-sha1") == 0) {
2399 peer_data->mac_length = 20;
2400 }
2401 else if (strcmp(mac_name, "hmac-md5") == 0) {
2402 peer_data->mac_length = 16;
2403 }
2404 else if (strcmp(mac_name, "hmac-ripemd160") == 0) {
2405 peer_data->mac_length = 20;
2406 }
2407 else if (strcmp(mac_name, "none") == 0) {
2408 peer_data->mac_length = 0;
2409 }
2410
2411 wmem_free(NULL((void*)0), mac_name);
2412}
2413
2414static void ssh_set_kex_specific_dissector(struct ssh_flow_data *global_data)
2415{
2416 const char *kex_name = global_data->kex;
2417
2418 if (!kex_name) return;
2419
2420 if (strcmp(kex_name, "diffie-hellman-group-exchange-sha1") == 0 ||
2421 strcmp(kex_name, "diffie-hellman-group-exchange-sha256") == 0)
2422 {
2423 global_data->kex_specific_dissector = ssh_dissect_kex_dh_gex;
2424 }
2425 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-"
) ) ||
2426 strcmp(kex_name, "[email protected]") == 0 ||
2427 strcmp(kex_name, "curve25519-sha256") == 0 ||
2428 strcmp(kex_name, "curve448-sha512") == 0)
2429 {
2430 global_data->kex_specific_dissector = ssh_dissect_kex_ecdh;
2431 }
2432 else if (strcmp(kex_name, "diffie-hellman-group14-sha256") == 0 ||
2433 strcmp(kex_name, "diffie-hellman-group16-sha512") == 0 ||
2434 strcmp(kex_name, "diffie-hellman-group18-sha512") == 0 ||
2435 strcmp(kex_name, "diffie-hellman-group1-sha1") == 0 ||
2436 strcmp(kex_name, "diffie-hellman-group14-sha1") == 0)
2437 {
2438 global_data->kex_specific_dissector = ssh_dissect_kex_dh;
2439 }
2440 else if (g_str_has_prefix(kex_name, "sntrup761x25519-sha512")(__builtin_constant_p ("sntrup761x25519-sha512")? __extension__
({ const char * const __str = (kex_name); const char * const
__prefix = ("sntrup761x25519-sha512"); 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, "sntrup761x25519-sha512") ) ||
2441 strcmp(kex_name, "mlkem768x25519-sha256") == 0 ||
2442 strcmp(kex_name, "mlkem768nistp256-sha256") == 0 ||
2443 strcmp(kex_name, "mlkem1024nistp384-sha384") == 0)
2444 {
2445 global_data->kex_specific_dissector = ssh_dissect_kex_pq_hybrid;
2446 }
2447 else
2448 {
2449 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"
, 2449, __func__, "NOT SUPPORTED OR UNKNOWN KEX DETECTED: ALGORITHM = %s"
, kex_name); } } while (0);
2450 }
2451}
2452
2453static int
2454ssh_gslist_compare_strings(const void *a, const void *b)
2455{
2456 if (a == NULL((void*)0) && b == NULL((void*)0))
2457 return 0;
2458 if (a == NULL((void*)0))
2459 return -1;
2460 if (b == NULL((void*)0))
2461 return 1;
2462 return strcmp((const char*)a, (const char*)b);
2463}
2464
2465/* expects that *result is NULL */
2466static bool_Bool
2467ssh_choose_algo(char *client, char *server, char **result)
2468{
2469 char **server_strings = NULL((void*)0);
2470 char **client_strings = NULL((void*)0);
2471 char **step;
2472 GSList *server_list = NULL((void*)0);
2473
2474 static const char* client_strict = "[email protected]";
2475 static const char* server_strict = "[email protected]";
2476 bool_Bool kex_strict = false0;
2477
2478 if (!client || !server || !result || *result)
2479 return false0;
2480
2481 server_strings = g_strsplit(server, ",", 0);
2482 for (step = server_strings; *step; step++) {
2483 server_list = g_slist_append(server_list, *step);
2484 }
2485
2486 client_strings = g_strsplit(client, ",", 0);
2487 for (step = client_strings; *step; step++) {
2488 GSList *agreed;
2489 if ((agreed = g_slist_find_custom(server_list, *step, ssh_gslist_compare_strings))) {
2490 *result = wmem_strdup(wmem_file_scope(), (const char *)agreed->data);
2491 break;
2492 }
2493 }
2494
2495 /* Check for the OpenSSH strict key exchange extension designed to
2496 * mitigate the Terrapin attack by resetting the packet sequence
2497 * number to zero after a SSH2_MSG_NEWKEYS message.
2498 * https://www.openssh.com/txt/release-9.6
2499 * Also see PROTOCOL in the OpenSSH source distribution.
2500 *
2501 * OpenSSH says this is activated "when an endpoint that supports this
2502 * extension observes this algorithm name in a peer's KEXINIT packet".
2503 * We'll have to assume that any endpoint that supports this also
2504 * indicates support for it in its own first SSH2_MSG_KEXINIT.
2505 */
2506 if (g_strv_contains((const char* const*)client_strings, client_strict) &&
2507 g_strv_contains((const char* const*)server_strings, server_strict)) {
2508
2509 kex_strict = true1;
2510 }
2511
2512 g_strfreev(client_strings);
2513 g_slist_free(server_list);
2514 g_strfreev(server_strings);
2515
2516 return kex_strict;
2517}
2518
2519static int
2520ssh_dissect_key_init(tvbuff_t *tvb, packet_info *pinfo, int offset,
2521 proto_tree *tree, int is_response, struct ssh_flow_data *global_data)
2522{
2523 int start_offset = offset;
2524 int payload_length;
2525 wmem_strbuf_t *hassh_algo;
2526 char *hassh;
2527
2528 proto_item *tf, *ti;
2529 proto_tree *key_init_tree;
2530
2531 struct ssh_peer_data *peer_data = &global_data->peer_data[is_response];
2532
2533 key_init_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_key_init, &tf, "Algorithms");
2534 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2535 peer_data->bn_cookie = ssh_kex_make_bignum(tvb_get_ptr(tvb, offset, 16), 16);
2536 }
2537 proto_tree_add_item(key_init_tree, hf_ssh_cookie,
2538 tvb, offset, 16, ENC_NA0x00000000);
2539 offset += 16;
2540
2541 offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2542 hf_ssh_kex_algorithms_length, hf_ssh_kex_algorithms,
2543 &peer_data->kex_proposal);
2544 offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2545 hf_ssh_server_host_key_algorithms_length,
2546 hf_ssh_server_host_key_algorithms, NULL((void*)0));
2547 offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2548 hf_ssh_encryption_algorithms_client_to_server_length,
2549 hf_ssh_encryption_algorithms_client_to_server,
2550 &peer_data->enc_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2551 offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2552 hf_ssh_encryption_algorithms_server_to_client_length,
2553 hf_ssh_encryption_algorithms_server_to_client,
2554 &peer_data->enc_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2555 offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2556 hf_ssh_mac_algorithms_client_to_server_length,
2557 hf_ssh_mac_algorithms_client_to_server,
2558 &peer_data->mac_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2559 offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2560 hf_ssh_mac_algorithms_server_to_client_length,
2561 hf_ssh_mac_algorithms_server_to_client,
2562 &peer_data->mac_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2563 offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2564 hf_ssh_compression_algorithms_client_to_server_length,
2565 hf_ssh_compression_algorithms_client_to_server,
2566 &peer_data->comp_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2567 offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2568 hf_ssh_compression_algorithms_server_to_client_length,
2569 hf_ssh_compression_algorithms_server_to_client,
2570 &peer_data->comp_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2571 offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2572 hf_ssh_languages_client_to_server_length,
2573 hf_ssh_languages_client_to_server, NULL((void*)0));
2574 offset = ssh_dissect_proposal(tvb, offset, key_init_tree,
2575 hf_ssh_languages_server_to_client_length,
2576 hf_ssh_languages_server_to_client, NULL((void*)0));
2577
2578 proto_tree_add_item(key_init_tree, hf_ssh_first_kex_packet_follows,
2579 tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
2580 offset+=1;
2581
2582 proto_tree_add_item(key_init_tree, hf_ssh_kex_reserved,
2583 tvb, offset, 4, ENC_NA0x00000000);
2584 offset+=4;
2585
2586 hassh_algo = wmem_strbuf_new(pinfo->pool, "");
2587 if(!is_response) {
2588 wmem_strbuf_append_printf(hassh_algo, "%s;%s;%s;%s", peer_data->kex_proposal, peer_data->enc_proposals[CLIENT_TO_SERVER_PROPOSAL0],
2589 peer_data->mac_proposals[CLIENT_TO_SERVER_PROPOSAL0], peer_data->comp_proposals[CLIENT_TO_SERVER_PROPOSAL0]);
2590 hassh = g_compute_checksum_for_string(G_CHECKSUM_MD5, wmem_strbuf_get_str(hassh_algo), wmem_strbuf_get_len(hassh_algo));
2591 ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hassh_algo, tvb, offset, 0, wmem_strbuf_get_str(hassh_algo));
2592 proto_item_set_generated(ti);
2593 ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hassh, tvb, offset, 0, hassh);
2594 proto_item_set_generated(ti);
2595 g_free(hassh)(__builtin_object_size ((hassh), 0) != ((size_t) - 1)) ? g_free_sized
(hassh, __builtin_object_size ((hassh), 0)) : (g_free) (hassh
);
2596 } else {
2597 wmem_strbuf_append_printf(hassh_algo, "%s;%s;%s;%s", peer_data->kex_proposal, peer_data->enc_proposals[SERVER_TO_CLIENT_PROPOSAL1],
2598 peer_data->mac_proposals[SERVER_TO_CLIENT_PROPOSAL1], peer_data->comp_proposals[SERVER_TO_CLIENT_PROPOSAL1]);
2599 hassh = g_compute_checksum_for_string(G_CHECKSUM_MD5, wmem_strbuf_get_str(hassh_algo), wmem_strbuf_get_len(hassh_algo));
2600 ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hasshserver_algo, tvb, offset, 0, wmem_strbuf_get_str(hassh_algo));
2601 proto_item_set_generated(ti);
2602 ti = proto_tree_add_string(key_init_tree, hf_ssh_kex_hasshserver, tvb, offset, 0, hassh);
2603 proto_item_set_generated(ti);
2604 g_free(hassh)(__builtin_object_size ((hassh), 0) != ((size_t) - 1)) ? g_free_sized
(hassh, __builtin_object_size ((hassh), 0)) : (g_free) (hassh
);
2605 }
2606
2607 if (global_data->peer_data[CLIENT_PEER_DATA0].kex_proposal &&
2608 global_data->peer_data[SERVER_PEER_DATA1].kex_proposal &&
2609 !global_data->kex)
2610 {
2611 /* Note: we're ignoring first_kex_packet_follows. */
2612 global_data->ext_kex_strict = ssh_choose_algo(
2613 global_data->peer_data[CLIENT_PEER_DATA0].kex_proposal,
2614 global_data->peer_data[SERVER_PEER_DATA1].kex_proposal,
2615 &global_data->kex);
2616 ssh_set_kex_specific_dissector(global_data);
2617 }
2618
2619 payload_length = offset - start_offset;
2620
2621 if (tf != NULL((void*)0)) {
2622 proto_item_set_len(tf, payload_length);
2623 }
2624
2625 // I_C / I_S (client and server SSH_MSG_KEXINIT payload) RFC4253 4.2
2626 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2627 uint8_t *data = (uint8_t *)wmem_alloc(pinfo->pool, payload_length + 1);
2628 tvb_memcpy(tvb, data + 1, start_offset, payload_length);
2629 data[0] = SSH_MSG_KEXINIT20;
2630 if(is_response){
2631 ssh_hash_buffer_put_string(global_data->kex_server_key_exchange_init, data, payload_length + 1);
2632 }else{
2633 // Reset array while REKEY: sanitize client key
2634 global_data->kex_client_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
2635 ssh_hash_buffer_put_string(global_data->kex_client_key_exchange_init, data, payload_length + 1);
2636 }
2637 }
2638
2639 return offset;
2640}
2641
2642static int
2643ssh_dissect_proposal(tvbuff_t *tvb, int offset, proto_tree *tree,
2644 int hf_index_length, int hf_index_value, char **store)
2645{
2646 uint32_t len = tvb_get_ntohl(tvb, offset);
2647 proto_tree_add_uint(tree, hf_index_length, tvb, offset, 4, len);
2648 offset += 4;
2649
2650 proto_tree_add_item(tree, hf_index_value, tvb, offset, len,
2651 ENC_ASCII0x00000000);
2652 if (store)
2653 *store = (char *) tvb_get_string_enc(wmem_file_scope(), tvb, offset, len, ENC_ASCII0x00000000);
2654 offset += len;
2655
2656 return offset;
2657}
2658
2659static void
2660ssh_keylog_read_file(void)
2661{
2662 if (!pref_keylog_file || !*pref_keylog_file) {
11
←
Assuming 'pref_keylog_file' is non-null
→
12
←
Assuming the condition is false
→
2663 ws_debug("no keylog file preference set")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 2663, __func__, "no keylog file preference set"); } } while
(0);
2664 return;
2665 }
2666
2667 if (ssh_keylog_file && file_needs_reopen(ws_filenofileno(ssh_keylog_file),
13
←
Assuming 'ssh_keylog_file' is non-null
→
14
←
Assuming the condition is false
→
15
←
Taking false branch
→
2668 pref_keylog_file)) {
2669 ssh_keylog_reset();
2670 g_hash_table_remove_all(ssh_master_key_map);
2671 }
2672
2673 if (!ssh_keylog_file) {
16
←
Assuming 'ssh_keylog_file' is non-null
→
17
←
Taking false branch
→
2674 ssh_keylog_file = ws_fopenfopen(pref_keylog_file, "r");
2675 if (!ssh_keylog_file) {
2676 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"
, 2677, __func__, "ssh: failed to open key log file %s: %s", pref_keylog_file
, g_strerror((*__errno_location ()))); } } while (0)
2677 pref_keylog_file, g_strerror(errno))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 2677, __func__, "ssh: failed to open key log file %s: %s", pref_keylog_file
, g_strerror((*__errno_location ()))); } } while (0);
2678 return;
2679 }
2680 }
2681
2682 /* File format: each line follows the format "<cookie> <type> <key>".
2683 * <cookie> is the hex-encoded (client or server) 16 bytes cookie
2684 * (32 characters) found in the SSH_MSG_KEXINIT of the endpoint whose
2685 * private random is disclosed.
2686 * <type> is either SHARED_SECRET or PRIVATE_KEY depending on the
2687 * type of key provided. PRIVAT_KEY is only supported for DH,
2688 * DH group exchange, and ECDH (including Curve25519) key exchanges.
2689 * <key> is the private random number that is used to generate the DH
2690 * negotiation (length depends on algorithm). In RFC4253 it is called
2691 * x for the client and y for the server.
2692 * For openssh and DH group exchange, it can be retrieved using
2693 * DH_get0_key(kex->dh, NULL, &server_random)
2694 * for groupN in file kexdh.c function kex_dh_compute_key
2695 * for custom group in file kexgexs.c function input_kex_dh_gex_init
2696 * For openssh and curve25519, it can be found in function kex_c25519_enc
2697 * in variable server_key. One may also provide the shared secret
2698 * directly if <type> is set to SHARED_SECRET.
2699 *
2700 * Example:
2701 * 90d886612f9c35903db5bb30d11f23c2 PRIVATE_KEY DEF830C22F6C927E31972FFB20B46C96D0A5F2D5E7BE5A3A8804D6BFC431619ED10AF589EEDFF4750DEA00EFD7AFDB814B6F3528729692B1F2482041521AE9DC
2702 */
2703 for (;;) {
18
←
Loop condition is true. Entering loop body
→
2704 // XXX - What is a reasonable max line length here? Note at a certain
2705 // point we have to increase the maximum ssh_kex_make_bignum supports (not needed for post quantum material (pure binary)).
2706 char buf[4096];// 4096 is needed for mlkem1024 private_key binary meterial: https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.203.pdf
2707 buf[0] = 0;
2708
2709 if (!fgets(buf, sizeof(buf), ssh_keylog_file)) {
19
←
Taking true branch
→
2710 rewind(ssh_keylog_file); // Resets to start of file (to handle parallel multi sessions decryption)
20
←
After calling 'rewind' reading 'errno' is required to find out if the call has failed
→
2711 if (ferror(ssh_keylog_file)) {
21
←
Value of 'errno' was not checked and may be overwritten by function 'ferror'
2712 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"
, 2712, __func__, "Error while reading %s, closing it.", pref_keylog_file
); } } while (0);
2713 ssh_keylog_reset();
2714 g_hash_table_remove_all(ssh_master_key_map);
2715 }
2716 break;
2717 }
2718
2719 size_t len = strlen(buf);
2720 while(len>0 && (buf[len-1]=='\r' || buf[len-1]=='\n')){len-=1;buf[len]=0;}
2721 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"
, 2721, __func__, "ssh: raw keylog line read: %s", buf); } } while
(0);
2722
2723 ssh_keylog_process_line(buf);
2724 }
2725}
2726
2727static void
2728ssh_keylog_process_lines(const uint8_t *data, unsigned datalen)
2729{
2730 const char *next_line = (const char *)data;
2731 const char *line_end = next_line + datalen;
2732 while (next_line && next_line < line_end) {
2733 const char *line = next_line;
2734 next_line = (const char *)memchr(line, '\n', line_end - line);
2735 ssize_t linelen;
2736
2737 if (next_line) {
2738 linelen = next_line - line;
2739 next_line++; /* drop LF */
2740 } else {
2741 linelen = (ssize_t)(line_end - line);
2742 }
2743 if (linelen > 0 && line[linelen - 1] == '\r') {
2744 linelen--; /* drop CR */
2745 }
2746
2747 ssh_debug_printf(" checking keylog line: %.*s\n", (int)linelen, line);
2748 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"
, 2748, __func__, "ssh: about to process line: %.*s", (int)linelen
, line); } } while (0);
2749
2750 char * strippedline = g_strndup(line, linelen);
2751 ssh_keylog_process_line(strippedline);
2752 g_free(strippedline)(__builtin_object_size ((strippedline), 0) != ((size_t) - 1))
? g_free_sized (strippedline, __builtin_object_size ((strippedline
), 0)) : (g_free) (strippedline);
2753 }
2754}
2755
2756static void
2757ssh_keylog_process_line(const char *line)
2758{
2759 ws_noisy("ssh: process line: %s", line)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c"
, 2759, __func__, "ssh: process line: %s", line); } } while (
0);
2760
2761 char **split = g_strsplit(line, " ", 3);
2762 char *cookie, *type, *key;
2763 size_t cookie_len, key_len;
2764
2765 if (g_strv_length(split) == 3) {
2766 // New format: [hex-encoded cookie] [key type] [hex-encoded key material]
2767 cookie = split[0];
2768 type = split[1];
2769 key = split[2];
2770 } else if (g_strv_length(split) == 2) {
2771 // Old format: [hex-encoded cookie] [hex-encoded private key]
2772 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"
, 2772, __func__, "ssh keylog: detected old keylog format without explicit key type"
); } } while (0);
2773 type = "PRIVATE_KEY";
2774 cookie = split[0];
2775 key = split[1];
2776 } else {
2777 ws_info("ssh keylog: invalid format")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_INFO, ((void
*)0), -1, ((void*)0), "ssh keylog: invalid format"); } } while
(0);
2778 g_strfreev(split);
2779 return;
2780 }
2781
2782 key_len = strlen(key);
2783 cookie_len = strlen(cookie);
2784 if(key_len & 1){
2785 ws_info("ssh keylog: invalid format (key should at least be even!)")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_INFO, ((void
*)0), -1, ((void*)0), "ssh keylog: invalid format (key should at least be even!)"
); } } while (0);
2786 g_strfreev(split);
2787 return;
2788 }
2789 if(cookie_len & 1){
2790 ws_info("ssh keylog: invalid format (cookie should at least be even!)")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_INFO, ((void
*)0), -1, ((void*)0), "ssh keylog: invalid format (cookie should at least be even!)"
); } } while (0);
2791 g_strfreev(split);
2792 return;
2793 }
2794 ssh_bignum * bn_cookie = ssh_kex_make_bignum(NULL((void*)0), (unsigned)(cookie_len/2));
2795 if (bn_cookie == NULL((void*)0)) {
2796 ws_info("ssh keylog: invalid format (invalid cookie length %zu)", cookie_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_INFO, ((void
*)0), -1, ((void*)0), "ssh keylog: invalid format (invalid cookie length %zu)"
, cookie_len); } } while (0);
2797 g_strfreev(split);
2798 return;
2799 }
2800 ssh_bignum * bn_priv = ssh_kex_make_bignum(NULL((void*)0), (unsigned)(key_len/2));
2801 if (bn_priv == NULL((void*)0)) {
2802 ws_info("ssh keylog: invalid format (invalid key length %zu)", key_len)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_INFO, ((void
*)0), -1, ((void*)0), "ssh keylog: invalid format (invalid key length %zu)"
, key_len); } } while (0);
2803 g_strfreev(split);
2804 return;
2805 }
2806 uint8_t c;
2807 for (size_t i = 0; i < key_len/2; i ++) {
2808 char v0 = key[i * 2];
2809 int8_t h0 = ws_xton(v0);
2810 char v1 = key[i * 2 + 1];
2811 int8_t h1 = ws_xton(v1);
2812
2813 if (h0==-1 || h1==-1) {
2814 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"
, 2814, __func__, "ssh: can't process key, invalid hex number: %c%c"
, v0, v1); } } while (0);
2815 g_strfreev(split);
2816 return;
2817 }
2818
2819 c = (h0 << 4) | h1;
2820
2821 bn_priv->data[i] = c;
2822 }
2823 for (size_t i = 0; i < cookie_len/2; i ++) {
2824 char v0 = cookie[i * 2];
2825 int8_t h0 = ws_xton(v0);
2826 char v1 = cookie[i * 2 + 1];
2827 int8_t h1 = ws_xton(v1);
2828
2829 if (h0==-1 || h1==-1) {
2830 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"
, 2830, __func__, "ssh: can't process cookie, invalid hex number: %c%c"
, v0, v1); } } while (0);
2831 g_strfreev(split);
2832 return;
2833 }
2834
2835 c = (h0 << 4) | h1;
2836
2837 bn_cookie->data[i] = c;
2838 }
2839 ssh_bignum * bn_priv_ht = g_new(ssh_bignum, 1)((ssh_bignum *) g_malloc_n ((1), sizeof (ssh_bignum)));
2840 bn_priv_ht->length = bn_priv->length;
2841 bn_priv_ht->data = (uint8_t *) g_memdup2(bn_priv->data, bn_priv->length);
2842 ssh_bignum * bn_cookie_ht = g_new(ssh_bignum, 1)((ssh_bignum *) g_malloc_n ((1), sizeof (ssh_bignum)));
2843 bn_cookie_ht->length = bn_cookie->length;
2844 bn_cookie_ht->data = (uint8_t *) g_memdup2(bn_cookie->data, bn_cookie->length);
2845
2846 char * type_ht = (char *) g_memdup2(type, strlen(type) + 1);
2847 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
)));
2848 entry_ht->type = type_ht;
2849 entry_ht->key_material = bn_priv_ht;
2850 g_hash_table_insert(ssh_master_key_map, bn_cookie_ht, entry_ht);
2851 g_strfreev(split);
2852}
2853
2854static void
2855ssh_keylog_reset(void)
2856{
2857 if (ssh_keylog_file) {
2858 fclose(ssh_keylog_file);
2859 ssh_keylog_file = NULL((void*)0);
2860 }
2861}
2862
2863static unsigned
2864ssh_kex_type(char *type)
2865{
2866 if (type) {
2867 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") )) {
2868 return SSH_KEX_CURVE255190x00010000;
2869 }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"
) )) {
2870 return SSH_KEX_SNTRUP761X255190x00040000;
2871 }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"
) )) {
2872 return SSH_KEX_MLKEM768X255190x00050000;
2873 }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") )) {
2874 return SSH_KEX_DH_GEX0x00020000;
2875 }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"
) )) {
2876 return SSH_KEX_DH_GROUP140x00030014;
2877 }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"
) )) {
2878 return SSH_KEX_DH_GROUP160x00030016;
2879 }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"
) )) {
2880 return SSH_KEX_DH_GROUP180x00030018;
2881 }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"
) )) {
2882 return SSH_KEX_DH_GROUP10x00030001;
2883 }
2884 }
2885
2886 return 0;
2887}
2888
2889static unsigned
2890ssh_kex_hash_type(char *type_string)
2891{
2892 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"
) )) {
2893 return SSH_KEX_HASH_SHA11;
2894 }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") )) {
2895 return SSH_KEX_HASH_SHA2562;
2896 }else if (type_string && g_str_has_suffix(type_string, "[email protected]")(__builtin_constant_p ("[email protected]")? __extension__ ({
const char * const __str = (type_string); const char * const
__suffix = ("[email protected]"); 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, "[email protected]") )) {
2897 return SSH_KEX_HASH_SHA2562;
2898 }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") )) {
2899 return SSH_KEX_HASH_SHA5124;
2900 } else {
2901 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"
, 2901, __func__, "hash type %s not supported", type_string);
} } while (0);
2902 return 0;
2903 }
2904}
2905
2906static ssh_bignum *
2907ssh_kex_make_bignum(const uint8_t *data, unsigned length)
2908{
2909 // 512 bytes (4096 bits) is the maximum bignum size we're supporting
2910 // Actually we need 513 bytes, to make provision for signed values
2911 // Diffie-Hellman group 18 has 8192 bits
2912 if (length == 0 || length > 1025) {
2913 return NULL((void*)0);
2914 }
2915
2916 ssh_bignum *bn = wmem_new0(wmem_file_scope(), ssh_bignum)((ssh_bignum*)wmem_alloc0((wmem_file_scope()), sizeof(ssh_bignum
)));
2917 bn->data = (uint8_t *)wmem_alloc0(wmem_file_scope(), length);
2918
2919 if (data) {
2920 memcpy(bn->data, data, length);
2921 }
2922
2923 bn->length = length;
2924 return bn;
2925}
2926
2927static bool_Bool
2928ssh_read_e(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2929{
2930 // store the client's public part (e) for later usage
2931 uint32_t length = tvb_get_ntohl(tvb, offset);
2932 global_data->kex_e = ssh_kex_make_bignum(NULL((void*)0), length);
2933 if (!global_data->kex_e) {
2934 return false0;
2935 }
2936 tvb_memcpy(tvb, global_data->kex_e->data, offset + 4, length);
2937 return true1;
2938}
2939
2940static bool_Bool
2941ssh_read_f(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2942{
2943 // store the server's public part (f) for later usage
2944 uint32_t length = tvb_get_ntohl(tvb, offset);
2945 global_data->kex_f = ssh_kex_make_bignum(NULL((void*)0), length);
2946 if (!global_data->kex_f) {
2947 return false0;
2948 }
2949 tvb_memcpy(tvb, global_data->kex_f->data, offset + 4, length);
2950 return true1;
2951}
2952
2953static int // add support of client PQ hybrid key (e)
2954ssh_read_e_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2955{
2956 // Read length of PQ client key
2957 uint32_t length = tvb_get_ntohl(tvb, offset);
2958
2959 // Sanity check
2960 if (length == 0 || length > 65535) {
2961 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"
, 2961, __func__, "ssh_read_e_pq: Invalid PQ key length: %u",
length); } } while (0);
2962 return false0;
2963 }
2964
2965 // Free any existing data (if dissecting multiple sessions)
2966 wmem_free(wmem_file_scope(), global_data->kex_e_pq);
2967
2968 // Allocate and store the PQ client key
2969 global_data->kex_e_pq = (unsigned char *)wmem_alloc(wmem_file_scope(), length);
2970 global_data->kex_e_pq_len = length;
2971
2972 tvb_memcpy(tvb, global_data->kex_e_pq, offset + 4, length);
2973
2974 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"
, 2974, __func__, "Stored %u bytes of client PQ key - stored new_offset_client: %d - offset: %d"
, length, offset + 4 + length, offset); } } while (0);
2975 return offset + 4 + length; // consuming packet (advancing offset)
2976}
2977
2978static int // add support of server PQ hybrid key (f)
2979ssh_read_f_pq(tvbuff_t *tvb, int offset, struct ssh_flow_data *global_data)
2980{
2981 // Read length of PQ server key
2982 uint32_t length = tvb_get_ntohl(tvb, offset);
2983
2984 // Sanity check
2985 if (length == 0 || length > 65535) {
2986 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"
, 2986, __func__, "ssh_read_f_pq: Invalid PQ key length: %u",
length); } } while (0);
2987 return false0;
2988 }
2989
2990 // Free any existing data
2991 wmem_free(wmem_file_scope(), global_data->kex_f_pq);
2992
2993 // Allocate and store the PQ server key
2994 global_data->kex_f_pq = (unsigned char *)wmem_alloc(wmem_file_scope(), length);
2995 global_data->kex_f_pq_len = length;
2996
2997 tvb_memcpy(tvb, global_data->kex_f_pq, offset + 4, length);
2998
2999 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"
, 2999, __func__, "Stored %u bytes of server PQ key - stored new_offset_server: %d - offset: %d"
, length, offset + 4 + length, offset); } } while (0);
3000 return offset + 4 + length; // consuming packet (advancing offset)
3001}
3002
3003
3004static ssh_bignum *
3005ssh_read_mpint(tvbuff_t *tvb, int offset)
3006{
3007 // store the DH group modulo (p) for later usage
3008 int length = tvb_get_ntohl(tvb, offset);
3009 ssh_bignum * bn = ssh_kex_make_bignum(NULL((void*)0), length);
3010 if (!bn) {
3011 ws_debug("invalid bignum length %u", length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 3011, __func__, "invalid bignum length %u", length); } } while
(0);
3012 return NULL((void*)0);
3013 }
3014 tvb_memcpy(tvb, bn->data, offset + 4, length);
3015 return bn;
3016}
3017
3018static void
3019ssh_keylog_hash_write_secret(struct ssh_flow_data *global_data, wmem_allocator_t* tmp_allocator)
3020{
3021 /*
3022 * This computation is defined differently for each key exchange method:
3023 * https://tools.ietf.org/html/rfc4253#page-23
3024 * https://tools.ietf.org/html/rfc5656#page-8
3025 * https://tools.ietf.org/html/rfc4419#page-4
3026 * All key exchange methods:
3027 * https://www.iana.org/assignments/ssh-parameters/ssh-parameters.xhtml#ssh-parameters-16
3028 */
3029
3030 gcry_md_hd_t hd;
3031 ssh_key_map_entry_t *entry;
3032 ssh_bignum *secret = NULL((void*)0);
3033 int length;
3034 bool_Bool client_cookie = false0;
3035
3036 ssh_keylog_read_file();
10
←
Calling 'ssh_keylog_read_file'
→
3037
3038 unsigned kex_type = ssh_kex_type(global_data->kex);
3039 unsigned kex_hash_type = ssh_kex_hash_type(global_data->kex);
3040
3041 entry = (ssh_key_map_entry_t *)g_hash_table_lookup(ssh_master_key_map, global_data->peer_data[SERVER_PEER_DATA1].bn_cookie);
3042 if (!entry) {
3043 entry = (ssh_key_map_entry_t *)g_hash_table_lookup(ssh_master_key_map, global_data->peer_data[CLIENT_PEER_DATA0].bn_cookie);
3044 client_cookie = true1;
3045 }
3046 if (!entry) {
3047 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"
, 3047, __func__, "ssh decryption: no entry in keylog file for this session"
); } } while (0);
3048 global_data->do_decrypt = false0;
3049 return;
3050 }
3051
3052 if (!strcmp(entry->type, "PRIVATE_KEY")) {
3053 if (client_cookie) {
3054 secret = ssh_kex_shared_secret(kex_type, global_data->kex_f, entry->key_material, global_data->kex_gex_p);
3055 } else {
3056 secret = ssh_kex_shared_secret(kex_type, global_data->kex_e, entry->key_material, global_data->kex_gex_p);
3057 }
3058 } else if (!strcmp(entry->type, "SHARED_SECRET")) {
3059 secret = ssh_kex_make_bignum(entry->key_material->data, entry->key_material->length);
3060 } else {
3061 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"
, 3061, __func__, "ssh decryption: unknown key type in keylog file"
); } } while (0);
3062 global_data->do_decrypt = false0;
3063 return;
3064 }
3065
3066 if (!secret) {
3067 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"
, 3067, __func__, "ssh decryption: no key material for this session"
); } } while (0);
3068 global_data->do_decrypt = false0;
3069 return;
3070 }
3071
3072 // shared secret data needs to be written as an mpint, and we need it later
3073 if (kex_type == SSH_KEX_SNTRUP761X255190x00040000 || kex_type == SSH_KEX_MLKEM768X255190x00050000) {
3074 // Reset array while REKEY: sanitize shared_secret:
3075 global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
3076 // For PQ KEMs: use shared_secret as-is, whether SHARED_SECRET or PRIVATE_KEY
3077 // Do NOT prepend 0x00 (OpenSSH already encodes correctly for PQ KEM)
3078 ssh_hash_buffer_put_string(global_data->kex_shared_secret, secret->data, secret->length);
3079 } else {
3080 // For all other KEX types (e.g., curve25519, ecdh-sha2, etc.)
3081 // Pad with 0x00 if MSB is set, to comply with mpint format (RFC 4251)
3082 if (secret->data[0] & 0x80) { // Stored in Big endian
3083 length = secret->length + 1;
3084 uint8_t *tmp = (uint8_t *)wmem_alloc0(tmp_allocator, length);
3085 memcpy(tmp + 1, secret->data, secret->length);
3086 tmp[0] = 0;
3087 secret->data = tmp;
3088 secret->length = length;
3089 }
3090 // Reset array while REKEY: sanitize shared_secret:
3091 global_data->kex_shared_secret = wmem_array_new(wmem_file_scope(), 1);
3092 ssh_hash_buffer_put_string(global_data->kex_shared_secret, secret->data, secret->length);
3093 }
3094
3095 wmem_array_t * kex_gex_p = wmem_array_new(tmp_allocator, 1);
3096 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);}
3097 wmem_array_t * kex_gex_g = wmem_array_new(tmp_allocator, 1);
3098 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);}
3099 wmem_array_t * kex_e = wmem_array_new(tmp_allocator, 1);
3100 if(global_data->kex_e){ssh_hash_buffer_put_string(kex_e, global_data->kex_e->data, global_data->kex_e->length);}
3101 wmem_array_t * kex_f = wmem_array_new(tmp_allocator, 1);
3102 if(global_data->kex_f){ssh_hash_buffer_put_string(kex_f, global_data->kex_f->data, global_data->kex_f->length);}
3103 wmem_array_t * kex_e_pq = wmem_array_new(tmp_allocator, 1);
3104 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);}
3105 wmem_array_t * kex_f_pq = wmem_array_new(tmp_allocator, 1);
3106 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);}
3107
3108 wmem_array_t * kex_hash_buffer = wmem_array_new(tmp_allocator, 1);
3109 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));
3110 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_client_version), wmem_array_get_count(global_data->kex_client_version));
3111 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));
3112 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_server_version), wmem_array_get_count(global_data->kex_server_version));
3113 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));
3114 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));
3115 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));
3116 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));
3117 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));
3118 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));
3119 if(kex_type==SSH_KEX_DH_GEX0x00020000){
3120 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));
3121 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));
3122 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));
3123 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));
3124 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));
3125 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));
3126 ssh_print_data("key modulo (p)", (const unsigned char *)wmem_array_get_raw(kex_gex_p), wmem_array_get_count(kex_gex_p));
3127 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_gex_p), wmem_array_get_count(kex_gex_p));
3128 ssh_print_data("key base (g)", (const unsigned char *)wmem_array_get_raw(kex_gex_g), wmem_array_get_count(kex_gex_g));
3129 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_gex_g), wmem_array_get_count(kex_gex_g));
3130 ssh_print_data("key client (e)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3131 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3132 ssh_print_data("key server (f)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3133 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3134 }
3135 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){
3136 ssh_print_data("key client (e)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3137 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3138 ssh_print_data("key server (f)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3139 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3140 }
3141 if(kex_type==SSH_KEX_CURVE255190x00010000){
3142 ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3143 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e), wmem_array_get_count(kex_e));
3144 ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3145 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f), wmem_array_get_count(kex_f));
3146 }
3147 if (kex_type==SSH_KEX_SNTRUP761X255190x00040000){ // Add support of sntrup761x25519
3148 ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3149 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3150 ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3151 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3152 ws_noisy("Switch to SSH_KEX_SNTRUP761X25519")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c"
, 3152, __func__, "Switch to SSH_KEX_SNTRUP761X25519"); } } while
(0);
3153 }
3154 if (kex_type==SSH_KEX_MLKEM768X255190x00050000){ // Add support of mlkem768x25519
3155 ssh_print_data("key client (Q_C)", (const unsigned char *)wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3156 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_e_pq), wmem_array_get_count(kex_e_pq));
3157 ssh_print_data("key server (Q_S)", (const unsigned char *)wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3158 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(kex_f_pq), wmem_array_get_count(kex_f_pq));
3159 ws_noisy("Switch to SSH_KEX_MLKEM768X25519")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c"
, 3159, __func__, "Switch to SSH_KEX_MLKEM768X25519"); } } while
(0);
3160 }
3161 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));
3162 wmem_array_append(kex_hash_buffer, wmem_array_get_raw(global_data->kex_shared_secret), wmem_array_get_count(global_data->kex_shared_secret));
3163
3164 ssh_print_data("exchange", (const unsigned char *)wmem_array_get_raw(kex_hash_buffer), wmem_array_get_count(kex_hash_buffer));
3165
3166 unsigned hash_len = 32;
3167 if(kex_hash_type==SSH_KEX_HASH_SHA11) {
3168 gcry_md_open(&hd, GCRY_MD_SHA1, 0);
3169 hash_len = 20;
3170 } else if(kex_hash_type==SSH_KEX_HASH_SHA2562) {
3171 gcry_md_open(&hd, GCRY_MD_SHA256, 0);
3172 hash_len = 32;
3173 } else if(kex_hash_type==SSH_KEX_HASH_SHA5124) {
3174 gcry_md_open(&hd, GCRY_MD_SHA512, 0);
3175 hash_len = 64;
3176 } else {
3177 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"
, 3177, __func__, "kex_hash_type type %d not supported", kex_hash_type
); } } while (0);
3178 return;
3179 }
3180 uint8_t *exchange_hash = (uint8_t *)wmem_alloc0(wmem_file_scope(), hash_len);
3181 gcry_md_write(hd, wmem_array_get_raw(kex_hash_buffer), wmem_array_get_count(kex_hash_buffer));
3182 memcpy(exchange_hash, gcry_md_read(hd, 0), hash_len);
3183 gcry_md_close(hd);
3184 ssh_print_data("hash", exchange_hash, hash_len);
3185 global_data->secret = secret;
3186 ssh_derive_symmetric_keys(secret, exchange_hash, hash_len, global_data);
3187}
3188
3189// the purpose of this function is to deal with all different kex methods
3190static ssh_bignum *
3191ssh_kex_shared_secret(int kex_type, ssh_bignum *pub, ssh_bignum *priv, ssh_bignum *modulo)
3192{
3193 DISSECTOR_ASSERT(pub != NULL)((void) ((pub != ((void*)0)) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c"
, 3193, "pub != ((void*)0)"))));
3194 DISSECTOR_ASSERT(priv != NULL)((void) ((priv != ((void*)0)) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c"
, 3194, "priv != ((void*)0)"))));
3195
3196 ssh_bignum *secret = ssh_kex_make_bignum(NULL((void*)0), pub->length);
3197 if (!secret) {
3198 ws_debug("invalid key length %u", pub->length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 3198, __func__, "invalid key length %u", pub->length); }
} while (0);
3199 return NULL((void*)0);
3200 }
3201
3202 if(kex_type==SSH_KEX_DH_GEX0x00020000){
3203 if (modulo == NULL((void*)0)) {
3204 ws_debug("Missing group modulo")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 3204, __func__, "Missing group modulo"); } } while (0);
3205 return NULL((void*)0);
3206 }
3207 gcry_mpi_t b = NULL((void*)0);
3208 gcry_mpi_scan(&b, GCRYMPI_FMT_USG, pub->data, pub->length, NULL((void*)0));
3209 gcry_mpi_t d = NULL((void*)0), e = NULL((void*)0), m = NULL((void*)0);
3210 size_t result_len = 0;
3211 d = gcry_mpi_new(pub->length*8);
3212 gcry_mpi_scan(&e, GCRYMPI_FMT_USG, priv->data, priv->length, NULL((void*)0));
3213 gcry_mpi_scan(&m, GCRYMPI_FMT_USG, modulo->data, modulo->length, NULL((void*)0));
3214 gcry_mpi_powm(d, b, e, m); // gcry_mpi_powm(d, b, e, m) => d = b^e % m
3215 gcry_mpi_print(GCRYMPI_FMT_USG, secret->data, secret->length, &result_len, d);
3216 secret->length = (unsigned)result_len; // Should not be larger than what fits in a 32-bit unsigned integer...
3217 gcry_mpi_release(d);
3218 gcry_mpi_release(b);
3219 gcry_mpi_release(e);
3220 gcry_mpi_release(m);
3221
3222 }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){
3223 gcry_mpi_t m = NULL((void*)0);
3224 if(kex_type==SSH_KEX_DH_GROUP10x00030001){
3225 static const uint8_t p[] = {
3226 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3227 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3228 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3229 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3230 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3231 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3232 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3233 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE6, 0x53, 0x81, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3234 gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3235 }else if(kex_type==SSH_KEX_DH_GROUP140x00030014){
3236//p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
3237 static const uint8_t p[] = {
3238 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3239 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3240 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3241 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3242 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3243 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3244 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3245 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3246 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3247 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3248 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3249 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3250 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3251 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3252 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3253 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAC, 0xAA, 0x68, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
3254 gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3255 }else if(kex_type==SSH_KEX_DH_GROUP160x00030016){
3256//p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
3257 static const uint8_t p[] = {
3258 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3259 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3260 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3261 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3262 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3263 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3264 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3265 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3266 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3267 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3268 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3269 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3270 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3271 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3272 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3273 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D, 0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33,
3274 0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64, 0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A,
3275 0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, 0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7,
3276 0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, 0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D,
3277 0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B, 0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64,
3278 0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64, 0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C,
3279 0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, 0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2,
3280 0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, 0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E,
3281 0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01, 0x1A, 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7,
3282 0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA, 0x5B, 0x26, 0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C,
3283 0x1A, 0x94, 0x68, 0x34, 0xB6, 0x15, 0x0B, 0xDA, 0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,
3284 0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9, 0x2E, 0x8E, 0xFC, 0x14, 0x1F, 0xBE, 0xCA, 0xA6,
3285 0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D, 0x99, 0xB2, 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2,
3286 0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7, 0xED, 0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF,
3287 0xB8, 0x1B, 0xDD, 0x76, 0x21, 0x70, 0x48, 0x1C, 0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9,
3288 0x93, 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1, 0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6, 0xC0, 0x8F,
3289 0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x06, 0x31, 0x99, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3290 gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3291 }else if(kex_type==SSH_KEX_DH_GROUP180x00030018){
3292//p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
3293 static const uint8_t p[] = {
3294 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
3295 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
3296 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
3297 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
3298 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
3299 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
3300 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
3301 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
3302 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
3303 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
3304 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
3305 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
3306 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
3307 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
3308 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
3309 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4, 0x2D, 0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33,
3310 0xA8, 0x55, 0x21, 0xAB, 0xDF, 0x1C, 0xBA, 0x64, 0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A,
3311 0x8A, 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, 0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1, 0xE4, 0xC7,
3312 0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, 0x1E, 0x8C, 0x94, 0xE0, 0x4A, 0x25, 0x61, 0x9D,
3313 0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B, 0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64,
3314 0xD8, 0x76, 0x02, 0x73, 0x3E, 0xC8, 0x6A, 0x64, 0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C,
3315 0xBB, 0xE1, 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, 0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46, 0xE2,
3316 0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, 0x43, 0xDB, 0x5B, 0xFC, 0xE0, 0xFD, 0x10, 0x8E,
3317 0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01, 0x1A, 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7,
3318 0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA, 0x5B, 0x26, 0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C,
3319 0x1A, 0x94, 0x68, 0x34, 0xB6, 0x15, 0x0B, 0xDA, 0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,
3320 0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9, 0x2E, 0x8E, 0xFC, 0x14, 0x1F, 0xBE, 0xCA, 0xA6,
3321 0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D, 0x99, 0xB2, 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2,
3322 0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7, 0xED, 0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF,
3323 0xB8, 0x1B, 0xDD, 0x76, 0x21, 0x70, 0x48, 0x1C, 0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9,
3324 0x93, 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1, 0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6, 0xC0, 0x8F,
3325 0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x02, 0x84, 0x92, 0x36, 0xC3, 0xFA, 0xB4, 0xD2, 0x7C, 0x70, 0x26,
3326 0xC1, 0xD4, 0xDC, 0xB2, 0x60, 0x26, 0x46, 0xDE, 0xC9, 0x75, 0x1E, 0x76, 0x3D, 0xBA, 0x37, 0xBD,
3327 0xF8, 0xFF, 0x94, 0x06, 0xAD, 0x9E, 0x53, 0x0E, 0xE5, 0xDB, 0x38, 0x2F, 0x41, 0x30, 0x01, 0xAE,
3328 0xB0, 0x6A, 0x53, 0xED, 0x90, 0x27, 0xD8, 0x31, 0x17, 0x97, 0x27, 0xB0, 0x86, 0x5A, 0x89, 0x18,
3329 0xDA, 0x3E, 0xDB, 0xEB, 0xCF, 0x9B, 0x14, 0xED, 0x44, 0xCE, 0x6C, 0xBA, 0xCE, 0xD4, 0xBB, 0x1B,
3330 0xDB, 0x7F, 0x14, 0x47, 0xE6, 0xCC, 0x25, 0x4B, 0x33, 0x20, 0x51, 0x51, 0x2B, 0xD7, 0xAF, 0x42,
3331 0x6F, 0xB8, 0xF4, 0x01, 0x37, 0x8C, 0xD2, 0xBF, 0x59, 0x83, 0xCA, 0x01, 0xC6, 0x4B, 0x92, 0xEC,
3332 0xF0, 0x32, 0xEA, 0x15, 0xD1, 0x72, 0x1D, 0x03, 0xF4, 0x82, 0xD7, 0xCE, 0x6E, 0x74, 0xFE, 0xF6,
3333 0xD5, 0x5E, 0x70, 0x2F, 0x46, 0x98, 0x0C, 0x82, 0xB5, 0xA8, 0x40, 0x31, 0x90, 0x0B, 0x1C, 0x9E,
3334 0x59, 0xE7, 0xC9, 0x7F, 0xBE, 0xC7, 0xE8, 0xF3, 0x23, 0xA9, 0x7A, 0x7E, 0x36, 0xCC, 0x88, 0xBE,
3335 0x0F, 0x1D, 0x45, 0xB7, 0xFF, 0x58, 0x5A, 0xC5, 0x4B, 0xD4, 0x07, 0xB2, 0x2B, 0x41, 0x54, 0xAA,
3336 0xCC, 0x8F, 0x6D, 0x7E, 0xBF, 0x48, 0xE1, 0xD8, 0x14, 0xCC, 0x5E, 0xD2, 0x0F, 0x80, 0x37, 0xE0,
3337 0xA7, 0x97, 0x15, 0xEE, 0xF2, 0x9B, 0xE3, 0x28, 0x06, 0xA1, 0xD5, 0x8B, 0xB7, 0xC5, 0xDA, 0x76,
3338 0xF5, 0x50, 0xAA, 0x3D, 0x8A, 0x1F, 0xBF, 0xF0, 0xEB, 0x19, 0xCC, 0xB1, 0xA3, 0x13, 0xD5, 0x5C,
3339 0xDA, 0x56, 0xC9, 0xEC, 0x2E, 0xF2, 0x96, 0x32, 0x38, 0x7F, 0xE8, 0xD7, 0x6E, 0x3C, 0x04, 0x68,
3340 0x04, 0x3E, 0x8F, 0x66, 0x3F, 0x48, 0x60, 0xEE, 0x12, 0xBF, 0x2D, 0x5B, 0x0B, 0x74, 0x74, 0xD6,
3341 0xE6, 0x94, 0xF9, 0x1E, 0x6D, 0xBE, 0x11, 0x59, 0x74, 0xA3, 0x92, 0x6F, 0x12, 0xFE, 0xE5, 0xE4,
3342 0x38, 0x77, 0x7C, 0xB6, 0xA9, 0x32, 0xDF, 0x8C, 0xD8, 0xBE, 0xC4, 0xD0, 0x73, 0xB9, 0x31, 0xBA,
3343 0x3B, 0xC8, 0x32, 0xB6, 0x8D, 0x9D, 0xD3, 0x00, 0x74, 0x1F, 0xA7, 0xBF, 0x8A, 0xFC, 0x47, 0xED,
3344 0x25, 0x76, 0xF6, 0x93, 0x6B, 0xA4, 0x24, 0x66, 0x3A, 0xAB, 0x63, 0x9C, 0x5A, 0xE4, 0xF5, 0x68,
3345 0x34, 0x23, 0xB4, 0x74, 0x2B, 0xF1, 0xC9, 0x78, 0x23, 0x8F, 0x16, 0xCB, 0xE3, 0x9D, 0x65, 0x2D,
3346 0xE3, 0xFD, 0xB8, 0xBE, 0xFC, 0x84, 0x8A, 0xD9, 0x22, 0x22, 0x2E, 0x04, 0xA4, 0x03, 0x7C, 0x07,
3347 0x13, 0xEB, 0x57, 0xA8, 0x1A, 0x23, 0xF0, 0xC7, 0x34, 0x73, 0xFC, 0x64, 0x6C, 0xEA, 0x30, 0x6B,
3348 0x4B, 0xCB, 0xC8, 0x86, 0x2F, 0x83, 0x85, 0xDD, 0xFA, 0x9D, 0x4B, 0x7F, 0xA2, 0xC0, 0x87, 0xE8,
3349 0x79, 0x68, 0x33, 0x03, 0xED, 0x5B, 0xDD, 0x3A, 0x06, 0x2B, 0x3C, 0xF5, 0xB3, 0xA2, 0x78, 0xA6,
3350 0x6D, 0x2A, 0x13, 0xF8, 0x3F, 0x44, 0xF8, 0x2D, 0xDF, 0x31, 0x0E, 0xE0, 0x74, 0xAB, 0x6A, 0x36,
3351 0x45, 0x97, 0xE8, 0x99, 0xA0, 0x25, 0x5D, 0xC1, 0x64, 0xF3, 0x1C, 0xC5, 0x08, 0x46, 0x85, 0x1D,
3352 0xF9, 0xAB, 0x48, 0x19, 0x5D, 0xED, 0x7E, 0xA1, 0xB1, 0xD5, 0x10, 0xBD, 0x7E, 0xE7, 0x4D, 0x73,
3353 0xFA, 0xF3, 0x6B, 0xC3, 0x1E, 0xCF, 0xA2, 0x68, 0x35, 0x90, 0x46, 0xF4, 0xEB, 0x87, 0x9F, 0x92,
3354 0x40, 0x09, 0x43, 0x8B, 0x48, 0x1C, 0x6C, 0xD7, 0x88, 0x9A, 0x00, 0x2E, 0xD5, 0xEE, 0x38, 0x2B,
3355 0xC9, 0x19, 0x0D, 0xA6, 0xFC, 0x02, 0x6E, 0x47, 0x95, 0x58, 0xE4, 0x47, 0x56, 0x77, 0xE9, 0xAA,
3356 0x9E, 0x30, 0x50, 0xE2, 0x76, 0x56, 0x94, 0xDF, 0xC8, 0x1F, 0x56, 0xE8, 0x80, 0xB9, 0x6E, 0x71,
3357 0x60, 0xC9, 0x80, 0xDD, 0x98, 0xED, 0xD3, 0xDF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,};
3358 gcry_mpi_scan(&m, GCRYMPI_FMT_USG, p, sizeof(p), NULL((void*)0));
3359 }
3360
3361 gcry_mpi_t b = NULL((void*)0);
3362 gcry_mpi_scan(&b, GCRYMPI_FMT_USG, pub->data, pub->length, NULL((void*)0));
3363 gcry_mpi_t d = NULL((void*)0), e = NULL((void*)0);
3364 size_t result_len = 0;
3365 d = gcry_mpi_new(pub->length*8);
3366 gcry_mpi_scan(&e, GCRYMPI_FMT_USG, priv->data, priv->length, NULL((void*)0));
3367 gcry_mpi_powm(d, b, e, m); // gcry_mpi_powm(d, b, e, m) => d = b^e % m
3368 gcry_mpi_print(GCRYMPI_FMT_USG, secret->data, secret->length, &result_len, d);
3369 secret->length = (unsigned)result_len; // Should not be larger than what fits in a 32-bit unsigned integer...
3370 gcry_mpi_release(d);
3371 gcry_mpi_release(b);
3372 gcry_mpi_release(e);
3373 gcry_mpi_release(m);
3374 }else if(kex_type==SSH_KEX_CURVE255190x00010000){
3375 if (priv->length != 32 || pub->length != 32) {
3376 ws_debug("curve25519: bad key length pub=%u or priv=%u != 32", pub->length, priv->length)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 3376, __func__, "curve25519: bad key length pub=%u or priv=%u != 32"
, pub->length, priv->length); } } while (0);
3377 return NULL((void*)0);
3378 }
3379 if (crypto_scalarmult_curve25519(secret->data, priv->data, pub->data)) {
3380 ws_debug("curve25519: can't compute shared secret")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 3380, __func__, "curve25519: can't compute shared secret");
} } while (0);
3381 return NULL((void*)0);
3382 }
3383 } else {
3384 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"
, 3384, __func__, "kex_type type %d not supported", kex_type)
; } } while (0);
3385 return 0;
3386 }
3387
3388 return secret;
3389}
3390
3391static char *
3392ssh_string(wmem_allocator_t* allocator, const uint8_t *string, unsigned length)
3393{
3394 char *ssh_string = (char *)wmem_alloc(allocator, length + 4);
3395 ssh_string[0] = (length >> 24) & 0xff;
3396 ssh_string[1] = (length >> 16) & 0xff;
3397 ssh_string[2] = (length >> 8) & 0xff;
3398 ssh_string[3] = length & 0xff;
3399 memcpy(ssh_string + 4, string, length);
3400 return ssh_string;
3401}
3402
3403static void
3404ssh_hash_buffer_put_string(wmem_array_t *buffer, const uint8_t *string,
3405 unsigned length)
3406{
3407 if (!buffer) {
3408 return;
3409 }
3410
3411 char *string_with_length = ssh_string(wmem_array_get_allocator(buffer), string, length);
3412 wmem_array_append(buffer, string_with_length, length + 4);
3413}
3414
3415static void
3416ssh_hash_buffer_put_uint32(wmem_array_t *buffer, unsigned val)
3417{
3418 if (!buffer) {
3419 return;
3420 }
3421
3422 char buf[4];
3423 buf[0] = (val >> 24); buf[1] = (val >> 16); buf[2] = (val >> 8); buf[3] = (val >> 0);
3424 wmem_array_append(buffer, buf, 4);
3425}
3426
3427static void ssh_derive_symmetric_keys(ssh_bignum *secret, uint8_t *exchange_hash,
3428 unsigned hash_length, struct ssh_flow_data *global_data)
3429{
3430 if (!global_data->session_id) {
3431 global_data->session_id = exchange_hash;
3432 global_data->session_id_length = hash_length;
3433 }
3434
3435 unsigned int we_need = 0;
3436 for(int peer_cnt=0;peer_cnt<2;peer_cnt++){
3437 struct ssh_peer_data * peer_data = &global_data->peer_data[peer_cnt];
3438 // required size of key depends on cipher used. chacha20 wants 64 bytes
3439 unsigned need = 0;
3440 if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3441 need = 64;
3442 } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id || CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id) {
3443 need = 16;
3444 } else if (CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id) {
3445 need = 24;
3446 } else if (CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
3447 need = 32;
3448 } else {
3449 ssh_debug_printf("ssh: cipher (%d) is unknown or not set\n", peer_data->cipher_id);
3450 ssh_debug_flush();
3451 }
3452 if(peer_data->mac_id == CIPHER_MAC_SHA2_2560x00020001){
3453 need = 32;
3454 }else{
3455 ssh_debug_printf("ssh: MAC (%d) is unknown or not set\n", peer_data->mac_id);
3456 ssh_debug_flush();
3457 }
3458 if (we_need<need) {
3459 we_need = need;
3460 }
3461 }
3462
3463 for (int i = 0; i < 6; i ++) {
3464 ssh_derive_symmetric_key(secret, exchange_hash, hash_length,
3465 'A' + i, &global_data->new_keys[i], global_data, we_need);
3466 if(i==0){ ssh_print_data("Initial IV client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3467 }else if(i==1){ ssh_print_data("Initial IV server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3468 }else if(i==2){ ssh_print_data("Encryption key client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3469 }else if(i==3){ ssh_print_data("Encryption key server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3470 }else if(i==4){ ssh_print_data("Integrity key client to server", global_data->new_keys[i].data, global_data->new_keys[i].length);
3471 }else if(i==5){ ssh_print_data("Integrity key server to client", global_data->new_keys[i].data, global_data->new_keys[i].length);
3472 }
3473 }
3474}
3475
3476static void ssh_derive_symmetric_key(ssh_bignum *secret, const uint8_t *exchange_hash,
3477 unsigned hash_length, char id, ssh_bignum *result_key,
3478 struct ssh_flow_data *global_data, unsigned we_need)
3479{
3480 gcry_md_hd_t hd;
3481
3482 unsigned kex_hash_type = ssh_kex_hash_type(global_data->kex);
3483 int algo = GCRY_MD_SHA256;
3484 if(kex_hash_type==SSH_KEX_HASH_SHA11){
3485 algo = GCRY_MD_SHA1;
3486 }else if(kex_hash_type==SSH_KEX_HASH_SHA2562){
3487 algo = GCRY_MD_SHA256;
3488 }else if(kex_hash_type==SSH_KEX_HASH_SHA5124){
3489 algo = GCRY_MD_SHA512;
3490 }
3491 unsigned len = gcry_md_get_algo_dlen(algo);
3492
3493 result_key->data = (unsigned char *)wmem_alloc(wmem_file_scope(), we_need);
3494
3495 char *secret_with_length = ssh_string(NULL((void*)0), secret->data, secret->length);
3496
3497 if (gcry_md_open(&hd, algo, 0) == 0) {
3498 gcry_md_write(hd, secret_with_length, secret->length + 4);
3499 gcry_md_write(hd, exchange_hash, hash_length);
3500 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);
3501 gcry_md_write(hd, global_data->session_id, hash_length);
3502 unsigned add_length = MIN(len, we_need)(((len) < (we_need)) ? (len) : (we_need));
3503 memcpy(result_key->data, gcry_md_read(hd, 0), add_length);
3504 gcry_md_close(hd);
3505 }
3506
3507 // expand key
3508 for (unsigned have = len; have < we_need; have += len) {
3509 if (gcry_md_open(&hd, algo, 0) == 0) {
3510 gcry_md_write(hd, secret_with_length, secret->length + 4);
3511 gcry_md_write(hd, exchange_hash, hash_length);
3512 gcry_md_write(hd, result_key->data+have-len, len);
3513 unsigned add_length = MIN(len, we_need - have)(((len) < (we_need - have)) ? (len) : (we_need - have));
3514 memcpy(result_key->data+have, gcry_md_read(hd, 0), add_length);
3515 gcry_md_close(hd);
3516 }
3517 }
3518 wmem_free(NULL((void*)0), secret_with_length);
3519
3520 result_key->length = we_need;
3521}
3522
3523static void
3524ssh_choose_enc_mac(struct ssh_flow_data *global_data)
3525{
3526 for(int peer_cnt=0;peer_cnt<2;peer_cnt++){
3527 struct ssh_peer_data * peer_data = &global_data->peer_data[peer_cnt];
3528 ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].enc_proposals[peer_cnt],
3529 global_data->peer_data[SERVER_PEER_DATA1].enc_proposals[peer_cnt],
3530 &peer_data->enc);
3531 /* some ciphers have their own MAC so the "negotiated" one is meaningless */
3532 if(peer_data->enc && (0 == strcmp(peer_data->enc, "[email protected]") ||
3533 0 == strcmp(peer_data->enc, "[email protected]"))) {
3534 peer_data->mac = wmem_strdup(wmem_file_scope(), (const char *)"<implicit>");
3535 peer_data->mac_length = 16;
3536 peer_data->length_is_plaintext = 1;
3537 }
3538 else if(peer_data->enc && 0 == strcmp(peer_data->enc, "[email protected]")) {
3539 peer_data->mac = wmem_strdup(wmem_file_scope(), (const char *)"<implicit>");
3540 peer_data->mac_length = 16;
3541 }
3542 else {
3543 ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].mac_proposals[peer_cnt],
3544 global_data->peer_data[SERVER_PEER_DATA1].mac_proposals[peer_cnt],
3545 &peer_data->mac);
3546 ssh_set_mac_length(peer_data);
3547 }
3548 ssh_choose_algo(global_data->peer_data[CLIENT_PEER_DATA0].comp_proposals[peer_cnt],
3549 global_data->peer_data[SERVER_PEER_DATA1].comp_proposals[peer_cnt],
3550 &peer_data->comp);
3551 }
3552
3553 ssh_decryption_set_cipher_id(&global_data->peer_data[CLIENT_PEER_DATA0]);
3554 ssh_decryption_set_mac_id(&global_data->peer_data[CLIENT_PEER_DATA0]);
3555 ssh_decryption_set_cipher_id(&global_data->peer_data[SERVER_PEER_DATA1]);
3556 ssh_decryption_set_mac_id(&global_data->peer_data[SERVER_PEER_DATA1]);
3557}
3558
3559static void
3560ssh_decryption_set_cipher_id(struct ssh_peer_data *peer)
3561{
3562 char *cipher_name = peer->enc;
3563
3564 if (!cipher_name) {
3565 peer->cipher = NULL((void*)0);
3566 ws_debug("ERROR: cipher_name is NULL")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 3566, __func__, "ERROR: cipher_name is NULL"); } } while (0
);
3567 } else if (0 == strcmp(cipher_name, "[email protected]")) { // add [email protected]
3568 peer->cipher_id = GCRY_CIPHER_CHACHA20;
3569 } else if (0 == strcmp(cipher_name, "chacha20-poly1305")) { // add chacha20-poly1305
3570 peer->cipher_id = GCRY_CIPHER_CHACHA20;
3571 } else if (0 == strcmp(cipher_name, "[email protected]")) {
3572 peer->cipher_id = CIPHER_AES128_GCM0x00040001;
3573 } else if (0 == strcmp(cipher_name, "aes128-gcm")) {
3574 peer->cipher_id = CIPHER_AES128_GCM0x00040001;
3575 } else if (0 == strcmp(cipher_name, "[email protected]")) {
3576 peer->cipher_id = CIPHER_AES256_GCM0x00040004;
3577 } else if (0 == strcmp(cipher_name, "aes256-gcm")) {
3578 peer->cipher_id = CIPHER_AES256_GCM0x00040004;
3579 } else if (0 == strcmp(cipher_name, "aes128-cbc")) {
3580 peer->cipher_id = CIPHER_AES128_CBC0x00020001;
3581 } else if (0 == strcmp(cipher_name, "aes192-cbc")) {
3582 peer->cipher_id = CIPHER_AES192_CBC0x00020002;
3583 } else if (0 == strcmp(cipher_name, "aes256-cbc")) {
3584 peer->cipher_id = CIPHER_AES256_CBC0x00020004;
3585 } else if (0 == strcmp(cipher_name, "aes128-ctr")) {
3586 peer->cipher_id = CIPHER_AES128_CTR0x00010001;
3587 } else if (0 == strcmp(cipher_name, "aes192-ctr")) {
3588 peer->cipher_id = CIPHER_AES192_CTR0x00010003;
3589 } else if (0 == strcmp(cipher_name, "aes256-ctr")) {
3590 peer->cipher_id = CIPHER_AES256_CTR0x00010004;
3591 } else if (0 == strcmp(cipher_name, "none")) {
3592 peer->cipher_id = CIPHER_NULL0x00080000;
3593 peer->length_is_plaintext = 1;
3594 } else {
3595 peer->cipher = NULL((void*)0);
3596 ws_debug("decryption not supported: %s", cipher_name)do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 3596, __func__, "decryption not supported: %s", cipher_name
); } } while (0);
3597 }
3598}
3599
3600static void
3601ssh_decryption_set_mac_id(struct ssh_peer_data *peer)
3602{
3603 char *mac_name = peer->mac;
3604
3605 if (!mac_name) {
3606 peer->mac = NULL((void*)0);
3607 ws_debug("ERROR: mac_name is NULL")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 3607, __func__, "ERROR: mac_name is NULL"); } } while (0);
3608 } else if (0 == strcmp(mac_name, "hmac-sha2-256")) {
3609 peer->mac_id = CIPHER_MAC_SHA2_2560x00020001;
3610 } else {
3611 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"
, 3611, __func__, "decryption MAC not supported: %s", mac_name
); } } while (0);
3612 }
3613}
3614
3615static bool_Bool
3616gcry_cipher_destroy_cb(wmem_allocator_t *allocator _U___attribute__((unused)), wmem_cb_event_t event _U___attribute__((unused)), void *user_data)
3617{
3618 gcry_cipher_hd_t hd = (gcry_cipher_hd_t)user_data;
3619
3620 gcry_cipher_close(hd);
3621
3622 return false0;
3623}
3624
3625static void
3626ssh_decryption_setup_cipher(struct ssh_peer_data *peer_data,
3627 ssh_bignum *iv, ssh_bignum *key)
3628{
3629 gcry_error_t err;
3630 gcry_cipher_hd_t *hd1, *hd2;
3631
3632 hd1 = &peer_data->cipher;
3633 hd2 = &peer_data->cipher_2;
3634
3635 if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3636 if (gcry_cipher_open(hd1, GCRY_CIPHER_CHACHA20, GCRY_CIPHER_MODE_STREAM, 0) ||
3637 gcry_cipher_open(hd2, GCRY_CIPHER_CHACHA20, GCRY_CIPHER_MODE_STREAM, 0)) {
3638 gcry_cipher_close(*hd1);
3639 gcry_cipher_close(*hd2);
3640 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"
, 3640, __func__, "ssh: can't open chacha20 cipher handles");
} } while (0);
3641 return;
3642 }
3643
3644 uint8_t k1[32];
3645 uint8_t k2[32];
3646 if(key->data){
3647 memcpy(k1, key->data, 32);
3648 memcpy(k2, key->data + 32, 32);
3649 }else{
3650 memset(k1, 0, 32);
3651 memset(k2, 0, 32);
3652 }
3653
3654 ssh_debug_printf("ssh: cipher is chacha20\n");
3655 ssh_print_data("key 1", k1, 32);
3656 ssh_print_data("key 2", k2, 32);
3657
3658 if ((err = gcry_cipher_setkey(*hd1, k1, 32))) {
3659 gcry_cipher_close(*hd1);
3660 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"
, 3660, __func__, "ssh: can't set chacha20 cipher key %s", gcry_strerror
(err)); } } while (0);
3661 return;
3662 }
3663
3664 if ((err = gcry_cipher_setkey(*hd2, k2, 32))) {
3665 gcry_cipher_close(*hd1);
3666 gcry_cipher_close(*hd2);
3667 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"
, 3667, __func__, "ssh: can't set chacha20 cipher key %s", gcry_strerror
(err)); } } while (0);
3668 return;
3669 }
3670
3671 wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3672 wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd2);
3673
3674 } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id) {
3675 int iKeyLen = CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id?16:CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id?24:32;
3676 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)) {
3677 gcry_cipher_close(*hd1);
3678 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"
, 3678, __func__, "ssh: can't open aes%d cipher handle", iKeyLen
*8); } } while (0);
3679 return;
3680 }
3681 uint8_t k1[32], iv1[16];
3682 if(key->data){
3683 memcpy(k1, key->data, iKeyLen);
3684 }else{
3685 memset(k1, 0, iKeyLen);
3686 }
3687 if(iv->data){
3688 memcpy(iv1, iv->data, 16);
3689 }else{
3690 memset(iv1, 0, 16);
3691 }
3692
3693 ssh_debug_printf("ssh: cipher is aes%d-cbc\n", iKeyLen*8);
3694 ssh_print_data("key", k1, iKeyLen);
3695 ssh_print_data("iv", iv1, 16);
3696
3697 if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3698 gcry_cipher_close(*hd1);
3699 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"
, 3699, __func__, "ssh: can't set aes%d cipher key", iKeyLen*
8); } } while (0);
3700 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"
, 3700, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource
(err), gcry_strerror(err)); } } while (0);
3701 return;
3702 }
3703
3704 if ((err = gcry_cipher_setiv(*hd1, iv1, 16))) {
3705 gcry_cipher_close(*hd1);
3706 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"
, 3706, __func__, "ssh: can't set aes%d cipher iv", iKeyLen*8
); } } while (0);
3707 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"
, 3707, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource
(err), gcry_strerror(err)); } } while (0);
3708 return;
3709 }
3710
3711 wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3712
3713 } else if (CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id) {
3714 int iKeyLen = CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id?16:CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id?24:32;
3715 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)) {
3716 gcry_cipher_close(*hd1);
3717 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"
, 3717, __func__, "ssh: can't open aes%d cipher handle", iKeyLen
*8); } } while (0);
3718 return;
3719 }
3720 uint8_t k1[32], iv1[16];
3721 if(key->data){
3722 memcpy(k1, key->data, iKeyLen);
3723 }else{
3724 memset(k1, 0, iKeyLen);
3725 }
3726 if(iv->data){
3727 memcpy(iv1, iv->data, 16);
3728 }else{
3729 memset(iv1, 0, 16);
3730 }
3731
3732 ssh_debug_printf("ssh: cipher is aes%d-ctr\n", iKeyLen*8);
3733 ssh_print_data("key", k1, iKeyLen);
3734 ssh_print_data("iv", iv1, 16);
3735
3736 if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3737 gcry_cipher_close(*hd1);
3738 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"
, 3738, __func__, "ssh: can't set aes%d cipher key", iKeyLen*
8); } } while (0);
3739 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"
, 3739, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource
(err), gcry_strerror(err)); } } while (0);
3740 return;
3741 }
3742
3743 if ((err = gcry_cipher_setctr(*hd1, iv1, 16))) {
3744 gcry_cipher_close(*hd1);
3745 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"
, 3745, __func__, "ssh: can't set aes%d cipher iv", iKeyLen*8
); } } while (0);
3746 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"
, 3746, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource
(err), gcry_strerror(err)); } } while (0);
3747 return;
3748 }
3749
3750 wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3751
3752 } else if (CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
3753 int iKeyLen = CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id?16:32;
3754 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)) {
3755 gcry_cipher_close(*hd1);
3756 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"
, 3756, __func__, "ssh: can't open aes%d cipher handle", iKeyLen
*8); } } while (0);
3757 return;
3758 }
3759
3760 uint8_t k1[32], iv2[12];
3761 if(key->data){
3762 memcpy(k1, key->data, iKeyLen);
3763 }else{
3764 memset(k1, 0, iKeyLen);
3765 }
3766 if(iv->data){
3767 memcpy(peer_data->iv, iv->data, 12);
3768 }else{
3769 memset(iv2, 0, 12);
3770 }
3771
3772 ssh_debug_printf("ssh: cipher is aes%d-gcm\n", iKeyLen*8);
3773 ssh_print_data("key", k1, iKeyLen);
3774 ssh_print_data("iv", peer_data->iv, 12);
3775
3776 if ((err = gcry_cipher_setkey(*hd1, k1, iKeyLen))) {
3777 gcry_cipher_close(*hd1);
3778 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"
, 3778, __func__, "ssh: can't set aes%d cipher key", iKeyLen*
8); } } while (0);
3779 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"
, 3779, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource
(err), gcry_strerror(err)); } } while (0);
3780 return;
3781 }
3782
3783 wmem_register_callback(wmem_file_scope(), gcry_cipher_destroy_cb, *hd1);
3784
3785 } else {
3786 ssh_debug_printf("ssh: cipher (%d) is unknown or not set\n", peer_data->cipher_id);
3787 }
3788}
3789
3790static void
3791ssh_decryption_setup_mac(struct ssh_peer_data *peer_data,
3792 ssh_bignum *iv)
3793{
3794 if(peer_data->mac_id == CIPHER_MAC_SHA2_2560x00020001){
3795 if(iv->data){
3796 memcpy(peer_data->hmac_iv, iv->data, 32);
3797 }else{
3798 memset(peer_data->hmac_iv, 0, 32);
3799 }
3800 peer_data->hmac_iv_len = 32;
3801 ssh_debug_printf("ssh: mac is hmac-sha2-256\n");
3802 ssh_print_data("iv", peer_data->hmac_iv, peer_data->hmac_iv_len);
3803 }else{
3804 ws_debug("ssh: unsupported MAC")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 3804, __func__, "ssh: unsupported MAC"); } } while (0);
3805 }
3806}
3807
3808/* libgcrypt wrappers for HMAC/message digest operations {{{ */
3809/* hmac abstraction layer */
3810#define SSH_HMACgcry_md_hd_t gcry_md_hd_t
3811
3812static inline int
3813ssh_hmac_init(SSH_HMACgcry_md_hd_t* md, const void * key, int len, int algo)
3814{
3815 gcry_error_t err;
3816 const char *err_str, *err_src;
3817
3818 err = gcry_md_open(md,algo, GCRY_MD_FLAG_HMAC);
3819 if (err != 0) {
3820 err_str = gcry_strerror(err);
3821 err_src = gcry_strsource(err);
3822 ssh_debug_printf("ssh_hmac_init(): gcry_md_open failed %s/%s", err_str, err_src);
3823 return -1;
3824 }
3825 err = gcry_md_setkey(*(md), key, len);
3826 if (err != 0) {
3827 err_str = gcry_strerror(err);
3828 err_src = gcry_strsource(err);
3829 ssh_debug_printf("ssh_hmac_init(): gcry_md_setkey(..., ..., %d) failed %s/%s", len, err_str, err_src);
3830 return -1;
3831 }
3832 return 0;
3833}
3834
3835static inline void
3836ssh_hmac_update(SSH_HMACgcry_md_hd_t* md, const void* data, int len)
3837{
3838 gcry_md_write(*(md), data, len);
3839}
3840
3841static inline void
3842ssh_hmac_final(SSH_HMACgcry_md_hd_t* md, unsigned char* data, unsigned* datalen)
3843{
3844 int algo;
3845 unsigned len;
3846
3847 algo = gcry_md_get_algo (*(md));
3848 len = gcry_md_get_algo_dlen(algo);
3849 DISSECTOR_ASSERT(len <= *datalen)((void) ((len <= *datalen) ? (void)0 : (proto_report_dissector_bug
("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-ssh.c"
, 3849, "len <= *datalen"))));
3850 memcpy(data, gcry_md_read(*(md), algo), len);
3851 *datalen = len;
3852}
3853
3854static inline void
3855ssh_hmac_cleanup(SSH_HMACgcry_md_hd_t* md)
3856{
3857 gcry_md_close(*(md));
3858}
3859/* libgcrypt wrappers for HMAC/message digest operations }}} */
3860
3861/* Decryption integrity check {{{ */
3862
3863static int
3864ssh_get_digest_by_id(unsigned mac_id)
3865{
3866 if(mac_id==CIPHER_MAC_SHA2_2560x00020001){
3867 return GCRY_MD_SHA256;
3868 }
3869 return -1;
3870}
3871
3872static void
3873ssh_calc_mac(struct ssh_peer_data *peer_data, uint32_t seqnr, uint8_t* data, uint32_t datalen, uint8_t* calc_mac)
3874{
3875 SSH_HMACgcry_md_hd_t hm;
3876 int md;
3877 uint32_t len;
3878 uint8_t buf[DIGEST_MAX_SIZE48];
3879
3880 md=ssh_get_digest_by_id(peer_data->mac_id);
3881// ssl_debug_printf("ssh_check_mac mac type:%s md %d\n",
3882// ssl_cipher_suite_dig(decoder->cipher_suite)->name, md);
3883
3884 memset(calc_mac, 0, DIGEST_MAX_SIZE48);
3885
3886 if (md == -1) {
3887 return;
3888 }
3889 if (ssh_hmac_init(&hm, peer_data->hmac_iv, peer_data->hmac_iv_len, md) != 0)
3890 return;
3891
3892 /* hash sequence number */
3893 phtonu32(buf, seqnr);
3894
3895 ssh_print_data("Mac IV", peer_data->hmac_iv, peer_data->hmac_iv_len);
3896 ssh_print_data("Mac seq", buf, 4);
3897 ssh_print_data("Mac data", data, datalen);
3898
3899 ssh_hmac_update(&hm,buf,4);
3900
3901 ssh_hmac_update(&hm,data,datalen);
3902
3903 /* get digest and digest len*/
3904 len = sizeof(buf);
3905 ssh_hmac_final(&hm,buf,&len);
3906 ssh_hmac_cleanup(&hm);
3907 ssh_print_data("Mac", buf, len);
3908 memcpy(calc_mac, buf, len);
3909
3910 return;
3911}
3912/* Decryption integrity check }}} */
3913
3914static ssh_packet_info_t *
3915ssh_get_packet_info(packet_info *pinfo, bool_Bool is_response)
3916{
3917 ssh_packet_info_t *packet = (ssh_packet_info_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_ssh, 0);
3918 if(!packet){
3919 packet = wmem_new0(wmem_file_scope(), ssh_packet_info_t)((ssh_packet_info_t*)wmem_alloc0((wmem_file_scope()), sizeof(
ssh_packet_info_t)));
3920 packet->from_server = is_response;
3921 packet->messages = NULL((void*)0);
3922 p_add_proto_data(wmem_file_scope(), pinfo, proto_ssh, 0, packet);
3923 }
3924 return packet;
3925}
3926
3927static unsigned
3928ssh_decrypt_packet(tvbuff_t *tvb, packet_info *pinfo,
3929 struct ssh_peer_data *peer_data, int offset)
3930{
3931 bool_Bool is_response = ssh_peer_data_from_server(peer_data);
3932
3933 gcry_error_t err;
3934 unsigned message_length = 0, seqnr;
3935 uint8_t *plain = NULL((void*)0);
3936 const uint8_t *mac;
3937 unsigned mac_len, data_len = 0;
3938 uint8_t calc_mac[DIGEST_MAX_SIZE48];
3939 memset(calc_mac, 0, DIGEST_MAX_SIZE48);
3940 unsigned remaining = tvb_captured_length_remaining(tvb, offset);
3941
3942 mac_len = peer_data->mac_length > 0 ? peer_data->mac_length : 0;
3943 seqnr = peer_data->sequence_number;
3944
3945 /* General algorithm:
3946 * 1. If there are not enough bytes for the packet_length, and we can
3947 * do reassembly, ask for one more segment.
3948 * 2. Retrieve packet_length (encrypted in some modes).
3949 * 3. Sanity check packet_length (the field is 4 bytes, but packet_length
3950 * is unlikely to be much larger than 32768, which provides good indication
3951 * a packet is continuation data or, in some modes, failed decryption.
3952 * https://www.rfc-editor.org/rfc/rfc4253.html#section-6.1 )
3953 * 4. If there are not enough bytes for packet_length, and we can do
3954 * reassembly, tell the TCP dissector how many more bytes we need.
3955 * 5. If the packet is truncated and we cannot reassemble, at this
3956 * point we conclude that it is the next SSH packet, and advance the
3957 * sequence number, invocation_counter, etc. before throwing an exception.
3958 * 6. If we do have all the data, we decrypt and check the MAC before
3959 * doing all that. (XXX - Advancing seqnr regardless could make sense
3960 * in some ciphers.)
3961 * 7. Possibly the MAC should be checked before decryption in some ciphers
3962 * if we have all the data; possibly there should be a "do not check the
3963 * MAC" preference a la TLS.
3964 */
3965
3966 if (GCRY_CIPHER_CHACHA20 == peer_data->cipher_id) {
3967 if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
3968 /* Can do reassembly, and the packet length is split across
3969 * segment boundaries. */
3970 pinfo->desegment_offset = offset;
3971 pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
3972 return tvb_captured_length(tvb);
3973 }
3974
3975 const uint8_t *ctext = tvb_get_ptr(tvb, offset, 4);
3976 uint8_t plain_length_buf[4];
3977
3978 if (!ssh_decrypt_chacha20(peer_data->cipher_2, seqnr, 0, ctext, 4,
3979 plain_length_buf, 4)) {
3980 ws_debug("ERROR: could not decrypt packet len")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 3980, __func__, "ERROR: could not decrypt packet len"); } }
while (0);
3981 return tvb_captured_length(tvb);
3982 }
3983
3984 message_length = pntohu32(plain_length_buf);
3985
3986 ssh_debug_printf("chachapoly_crypt seqnr=%d [%u]\n", seqnr, message_length);
3987
3988 ssh_debug_printf("%s plain for seq = %d len = %u\n", is_response?"s2c":"c2s", seqnr, message_length);
3989 if (message_length > SSH_MAX_PACKET_LEN32768) {
3990 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"
, 3990, __func__, "ssh: unreasonable message length %u", message_length
); } } while (0);
3991 return tvb_captured_length(tvb);
3992 }
3993 if (remaining < message_length + 4 + mac_len) {
3994 // Need desegmentation; as "the [email protected] AEAD
3995 // uses the sequence number as an initialisation vector (IV) to
3996 // generate its per-packet MAC key and is otherwise stateless
3997 // between packets," we need no special handling here.
3998 // https://datatracker.ietf.org/doc/draft-miller-sshm-strict-kex/
3999 //
4000 if (ssh_desegment && pinfo->can_desegment) {
4001 pinfo->desegment_offset = offset;
4002 pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4003 return tvb_captured_length(tvb);
4004 }
4005 // If we can't desegment, we will have an exception below in
4006 // the tvb_get_ptr. Advance the sequence number so that the
4007 // next SSH packet start will decrypt correctly.
4008 peer_data->sequence_number++;
4009 }
4010
4011 plain = (uint8_t *)wmem_alloc0(pinfo->pool, message_length+4);
4012 memcpy(plain, plain_length_buf, 4);
4013 const uint8_t *ctext2 = tvb_get_ptr(tvb, offset+4, message_length);
4014
4015 /* XXX - "Once the entire packet has been received, the MAC MUST be
4016 * checked before decryption," but we decrypt first.
4017 * https://datatracker.ietf.org/doc/html/draft-ietf-sshm-chacha20-poly1305-01
4018 */
4019 if (!ssh_decrypt_chacha20(peer_data->cipher, seqnr, 1, ctext2,
4020 message_length, plain+4, message_length)) {
4021 ws_debug("ERROR: could not decrypt packet payload")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 4021, __func__, "ERROR: could not decrypt packet payload");
} } while (0);
4022 return tvb_captured_length(tvb);
4023 }
4024
4025 mac = tvb_get_ptr(tvb, offset + 4 + message_length, mac_len);
4026 uint8_t poly_key[32], iv[16];
4027
4028 memset(poly_key, 0, 32);
4029 memset(iv, 0, 8);
4030 phtonu64(iv+8, (uint64_t)seqnr);
4031 gcry_cipher_setiv(peer_data->cipher, iv, mac_len);
4032 gcry_cipher_encrypt(peer_data->cipher, poly_key, 32, poly_key, 32);
4033
4034 gcry_mac_hd_t mac_hd;
4035 gcry_mac_open(&mac_hd, GCRY_MAC_POLY1305, 0, NULL((void*)0));
4036 gcry_mac_setkey(mac_hd, poly_key, 32);
4037 gcry_mac_write(mac_hd, ctext, 4);
4038 gcry_mac_write(mac_hd, ctext2, message_length);
4039 if (gcry_mac_verify(mac_hd, mac, mac_len)) {
4040 ws_debug("ssh: MAC does not match")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 4040, __func__, "ssh: MAC does not match"); } } while (0);
4041 }
4042 size_t buflen = DIGEST_MAX_SIZE48;
4043 gcry_mac_read(mac_hd, calc_mac, &buflen);
4044 gcry_mac_close(mac_hd);
4045
4046 data_len = message_length + 4;
4047
4048 ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
4049 ssh_print_data("", plain, message_length+4);
4050 } else if (CIPHER_AES128_GCM0x00040001 == peer_data->cipher_id || CIPHER_AES256_GCM0x00040004 == peer_data->cipher_id) {
4051
4052 /* AES GCM for Secure Shell [RFC 5647] */
4053 /* The message length is Additional Authenticated Data */
4054 if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
4055 /* Can do reassembly, and the packet length is split across
4056 * segment boundaries. */
4057 pinfo->desegment_offset = offset;
4058 pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4059 return tvb_captured_length(tvb);
4060 }
4061 message_length = tvb_get_uint32(tvb, offset, ENC_BIG_ENDIAN0x00000000);
4062 ssh_debug_printf("length: %d, remaining: %d\n", message_length, remaining);
4063 /* The minimum size of a packet (not counting mac) is 16. */
4064 if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 16) {
4065 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"
, 4065, __func__, "ssh: unreasonable message length %u", message_length
); } } while (0);
4066 return tvb_captured_length(tvb);
4067 }
4068
4069 /* SSH requires that the data to be encrypted (not including the AAD,
4070 * so message_length) be a multiple of the block size, 16 octets */
4071 if (message_length % 16 != 0) {
4072 ssh_debug_printf("length not a multiple of block length (16)!\n");
4073 }
4074
4075 if (message_length + 4 + mac_len > remaining) {
4076 // Need desegmentation; as the message length was unencrypted
4077 // AAD, we need no special handling here.
4078 if (pinfo->can_desegment) {
4079 pinfo->desegment_offset = offset;
4080 pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4081 return tvb_captured_length(tvb);
4082 }
4083 // If we can't desegment, we will have an exception below in
4084 // the tvb_get_ptr. Advance the sequence number (less crucial
4085 // than with ChaCha20, as it's not an input.)
4086 peer_data->sequence_number++;
4087 }
4088
4089 /* Set the IV and increment the invocation_counter for the next
4090 * packet. Do this before retrieving the ciphertext with tvb_get_ptr
4091 * in case this packet is truncated.
4092 */
4093 if ((err = gcry_cipher_setiv(peer_data->cipher, peer_data->iv, 12))) {
4094 //gcry_cipher_close(peer_data->cipher);
4095 //Don't close this unless we also remove the wmem callback
4096// TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4097#ifndef _WIN32
4098 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"
, 4098, __func__, "ssh: can't set aes128 cipher iv"); } } while
(0);
4099 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"
, 4099, __func__, "libgcrypt: %d %s %s", gcry_err_code(err), gcry_strsource
(err), gcry_strerror(err)); } } while (0);
4100#endif //ndef _WIN32
4101 return tvb_captured_length(tvb);
4102 }
4103 // Increment invocation_counter for next packet
4104 int idx = 12;
4105 do{
4106 idx -= 1;
4107 peer_data->iv[idx] += 1;
4108 }while(idx>4 && peer_data->iv[idx]==0);
4109
4110 const char *ctext = (const char *)tvb_get_ptr(tvb, offset + 4,
4111 message_length);
4112 plain = (uint8_t *)wmem_alloc(pinfo->pool, message_length+4);
4113 phtonu32(plain, message_length);
4114
4115 if ((err = gcry_cipher_authenticate(peer_data->cipher, plain, 4))) {
4116// TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4117#ifndef _WIN32
4118 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"
, 4118, __func__, "can't authenticate using aes128-gcm: %s\n"
, gpg_strerror(err)); } } while (0);
4119#endif //ndef _WIN32
4120 return tvb_captured_length(tvb);
4121 }
4122
4123 if ((err = gcry_cipher_decrypt(peer_data->cipher, plain+4, message_length,
4124 ctext, message_length))) {
4125// TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4126#ifndef _WIN32
4127 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"
, 4127, __func__, "can't decrypt aes-gcm %d %s %s", gcry_err_code
(err), gcry_strsource(err), gcry_strerror(err)); } } while (0
);
4128
4129#endif //ndef _WIN32
4130 return tvb_captured_length(tvb);
4131 }
4132
4133 if (gcry_cipher_gettag (peer_data->cipher, calc_mac, 16)) {
4134// TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4135#ifndef _WIN32
4136 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"
, 4136, __func__, "aes128-gcm, gcry_cipher_gettag() failed\n"
); } } while (0);
4137#endif //ndef _WIN32
4138 return tvb_captured_length(tvb);
4139 }
4140
4141 if ((err = gcry_cipher_reset(peer_data->cipher)gcry_cipher_ctl ((peer_data->cipher), GCRYCTL_RESET, ((void
*)0), 0))) {
4142// TODO: temporary work-around as long as a Windows python bug is triggered by automated tests
4143#ifndef _WIN32
4144 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"
, 4144, __func__, "aes-gcm, gcry_cipher_reset failed: %s\n", gpg_strerror
(err)); } } while (0);
4145#endif //ndef _WIN32
4146 return tvb_captured_length(tvb);
4147 }
4148
4149 data_len = message_length + 4;
4150
4151 ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
4152 ssh_print_data("", plain, message_length+4);
4153
4154 } else if (CIPHER_AES128_CBC0x00020001 == peer_data->cipher_id || CIPHER_AES128_CTR0x00010001 == peer_data->cipher_id ||
4155 CIPHER_AES192_CBC0x00020002 == peer_data->cipher_id || CIPHER_AES192_CTR0x00010003 == peer_data->cipher_id ||
4156 CIPHER_AES256_CBC0x00020004 == peer_data->cipher_id || CIPHER_AES256_CTR0x00010004 == peer_data->cipher_id) {
4157
4158 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"
, 4158, __func__, "Getting raw bytes of length %d", tvb_reported_length_remaining
(tvb, offset)); } } while (0);
4159 /* In CBC and CTR mode, the message length is encrypted as well.
4160 * We need to decrypt one block, 16 octets, to get the length.
4161 */
4162 if (ssh_desegment && pinfo->can_desegment && remaining < 16) {
4163 /* Can do reassembly, and the packet length is split across
4164 * segment boundaries. */
4165 pinfo->desegment_offset = offset;
4166 pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4167 return tvb_captured_length(tvb);
4168 }
4169 /* Do we already have the first block decrypted from when the packet
4170 * was too large and segmented?
4171 */
4172 if (!peer_data->plain0_valid) {
4173 const char *cypher_buf0 = (const char *)tvb_get_ptr(tvb, offset, 16);
4174
4175 if (gcry_cipher_decrypt(peer_data->cipher, peer_data->plain0, 16, cypher_buf0, 16))
4176 {
4177 ws_debug("can\'t decrypt aes128")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 4177, __func__, "can\'t decrypt aes128"); } } while (0);
4178 return tvb_captured_length(tvb);
4179 }
4180 }
4181
4182 message_length = pntohu32(peer_data->plain0);
4183
4184 /* The message_length value doesn't include the length of the
4185 * message_length field itself, so it must be at least 12 bytes.
4186 */
4187 if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 12){
4188 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"
, 4188, __func__, "ssh: unreasonable message length %u", message_length
); } } while (0);
4189 return tvb_captured_length(tvb);
4190 }
4191
4192 /* SSH requires that the data to be encrypted (message_length+4)
4193 * be a multiple of the block size, 16 octets. */
4194 if (message_length % 16 != 12) {
4195 ssh_debug_printf("total length not a multiple of block length (16)!\n");
4196 }
4197 if (remaining < message_length + 4 + mac_len) {
4198 /* Need desegmentation
4199 *
4200 * We will be handed the full encrypted packet again. We can either
4201 * store the decrypted first block, or will need to reset the CTR
4202 * or IV appropriately before decrypting the first block again.
4203 * libgcrypt does not provide an easy way to get the current value
4204 * of the CTR or (or IV/last block for CBC), so we just store the
4205 * decrypted first block.
4206 */
4207 if (ssh_desegment && pinfo->can_desegment) {
4208 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"
, 4209, __func__, " need_desegmentation: offset = %d, reported_length_remaining = %d\n"
, offset, tvb_reported_length_remaining(tvb, offset)); } } while
(0)
4209 offset, tvb_reported_length_remaining(tvb, offset))do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c"
, 4209, __func__, " need_desegmentation: offset = %d, reported_length_remaining = %d\n"
, offset, tvb_reported_length_remaining(tvb, offset)); } } while
(0);
4210 peer_data->plain0_valid = true1;
4211 pinfo->desegment_offset = offset;
4212 pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4213 return tvb_captured_length(tvb);
4214 } else {
4215 // If we can't desegment, we will have an exception below in
4216 // the tvb_get_ptr. Advance the sequence number so that the
4217 // the hash will work for the next packet.
4218 //
4219 // XXX - In CTR mode, we should advance the CTR based on the
4220 // known length so we can dissect the next block. We would
4221 // also need to reset the CTR after failing to dissect a
4222 // packet_length on the continuation data that comes next.
4223 peer_data->sequence_number++;
4224 }
4225 }
4226 peer_data->plain0_valid = false0;
4227 plain = (uint8_t *)wmem_alloc(pinfo->pool, message_length+4);
4228 memcpy(plain, peer_data->plain0, 16);
4229
4230 if (message_length > 12) {
4231 /* All of these functions actually do handle the case where
4232 * there is no data left, so the check is unnecessary.
4233 */
4234 char *ct = (char *)tvb_get_ptr(tvb, offset + 16, message_length - 12);
4235 if ((err = gcry_cipher_decrypt(peer_data->cipher, plain + 16, message_length - 12, ct, message_length - 12)))
4236 {
4237 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"
, 4237, __func__, "can't decrypt aes-cbc/ctr %d %s %s", gcry_err_code
(err), gcry_strsource(err), gcry_strerror(err)); } } while (0
);
4238 return tvb_captured_length(tvb);
4239 }
4240 }
4241
4242 ssh_debug_printf("%s plain text seq=%d", is_response?"s2c":"c2s",seqnr);
4243 ssh_print_data("", plain, message_length+4);
4244
4245 data_len = message_length + 4;
4246
4247 // XXX - In -etm modes, should calculate MAC based on ciphertext.
4248 ssh_calc_mac(peer_data, seqnr, plain, data_len, calc_mac);
4249 } else if (CIPHER_NULL0x00080000 == peer_data->cipher_id) {
4250 if (ssh_desegment && pinfo->can_desegment && remaining < 4) {
4251 /* Can do reassembly, and the packet length is split across
4252 * segment boundaries. */
4253 pinfo->desegment_offset = offset;
4254 pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4255 return tvb_captured_length(tvb);
4256 }
4257 message_length = tvb_get_uint32(tvb, offset, ENC_BIG_ENDIAN0x00000000);
4258 ssh_debug_printf("length: %d, remaining: %d\n", message_length, remaining);
4259 if (message_length > SSH_MAX_PACKET_LEN32768 || message_length < 8) {
4260 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"
, 4260, __func__, "ssh: unreasonable message length %u", message_length
); } } while (0);
4261 return tvb_captured_length(tvb);
4262 }
4263
4264 if (message_length + 4 + mac_len > remaining) {
4265 // Need desegmentation; as the message length was unencrypted
4266 // AAD, we need no special handling here.
4267 if (pinfo->can_desegment) {
4268 pinfo->desegment_offset = offset;
4269 pinfo->desegment_len = message_length + 4 + mac_len - remaining;
4270 return tvb_captured_length(tvb);
4271 }
4272 // If we can't desegment, we will have an exception below in
4273 // the tvb_memdup. Advance the sequence number (not crucial).
4274 peer_data->sequence_number++;
4275 }
4276 data_len = message_length + 4;
4277 plain = tvb_memdup(pinfo->pool, tvb, offset, data_len);
4278
4279 // XXX - In -etm modes, should calculate MAC based on ciphertext.
4280 ssh_calc_mac(peer_data, seqnr, plain, data_len, calc_mac);
4281 }
4282
4283 if (mac_len && data_len) {
4284 if (mac_len <= DIGEST_MAX_SIZE48 && !memcmp(tvb_get_ptr(tvb, offset + data_len, mac_len), calc_mac, mac_len)){
4285 ws_noisy("MAC OK")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_NOISY, "epan/dissectors/packet-ssh.c"
, 4285, __func__, "MAC OK"); } } while (0);
4286 }else{
4287 ws_debug("MAC ERR")do { if (1) { ws_log_full("packet-ssh", LOG_LEVEL_DEBUG, "epan/dissectors/packet-ssh.c"
, 4287, __func__, "MAC ERR"); } } while (0);
4288 /* Bad MAC, just show the packet as encrypted. We can get
4289 * this for a known encryption type with no keys currently. */
4290 if (!ssh_ignore_mac_failed) {
4291 return tvb_captured_length(tvb);
4292 }
4293 }
4294 }
4295
4296 if(plain){
4297 // Save message
4298
4299 ssh_packet_info_t *packet = ssh_get_packet_info(pinfo, is_response);
4300
4301 int record_id = tvb_raw_offset(tvb)+offset;
4302 ssh_message_info_t *message;
4303
4304 message = wmem_new(wmem_file_scope(), ssh_message_info_t)((ssh_message_info_t*)wmem_alloc((wmem_file_scope()), sizeof(
ssh_message_info_t)));
4305 message->sequence_number = peer_data->sequence_number++;
4306 message->plain_data = wmem_memdup(wmem_file_scope(), plain, data_len);
4307 message->data_len = data_len;
4308 message->id = record_id;
4309 message->next = NULL((void*)0);
4310 memcpy(message->calc_mac, calc_mac, DIGEST_MAX_SIZE48);
4311 ssh_debug_printf("%s->sequence_number++ > %d\n", is_response?"server":"client", peer_data->sequence_number);
4312
4313 ssh_message_info_t **pmessage = &packet->messages;
4314 while(*pmessage){
4315 pmessage = &(*pmessage)->next;
4316 }
4317 *pmessage = message;
4318 }
4319
4320 offset += message_length + mac_len + 4;
4321 return offset;
4322}
4323
4324static bool_Bool
4325ssh_decrypt_chacha20(gcry_cipher_hd_t hd,
4326 uint32_t seqnr, uint32_t counter, const unsigned char *ctext, unsigned ctext_len,
4327 unsigned char *plain, unsigned plain_len)
4328{
4329 unsigned char seq[8];
4330 unsigned char iv[16];
4331
4332 phtonu64(seq, (uint64_t)seqnr);
4333
4334 // chacha20 uses a different cipher handle for the packet payload & length
4335 // the payload uses a block counter
4336 if (counter) {
4337 const unsigned char ctr[8] = {1,0,0,0,0,0,0,0};
4338 memcpy(iv, ctr, 8);
4339 memcpy(iv+8, seq, 8);
4340 }
4341
4342 return ((!counter && gcry_cipher_setiv(hd, seq, 8) == 0) ||
4343 (counter && gcry_cipher_setiv(hd, iv, 16) == 0)) &&
4344 gcry_cipher_decrypt(hd, plain, plain_len, ctext, ctext_len) == 0;
4345}
4346
4347static int
4348ssh_dissect_decrypted_packet(tvbuff_t *tvb, packet_info *pinfo,
4349 struct ssh_peer_data *peer_data, proto_tree *tree,
4350 ssh_message_info_t *message)
4351{
4352 unsigned offset = 0; // TODO:
4353 int dissected_len = 0;
4354 tvbuff_t* payload_tvb;
4355
4356 const uint8_t* plaintext = message->plain_data;
4357 unsigned plaintext_len = message->data_len;
4358
4359 col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL((void*)0), "Encrypted packet (plaintext_len=%d)", plaintext_len);
4360
4361 tvbuff_t *packet_tvb = tvb_new_child_real_data(tvb, plaintext, plaintext_len, plaintext_len);
4362 add_new_data_source(pinfo, packet_tvb, "Decrypted Packet");
4363
4364 unsigned plen;
4365 uint32_t padding_length;
4366 unsigned remain_length;
4367 unsigned msg_code;
4368
4369 proto_item *ti, *padding_ti;
4370 proto_item *msg_type_tree = NULL((void*)0);
4371
4372 /*
4373 * We use "tvb_ensure_captured_length_remaining()" to make sure there
4374 * actually *is* data remaining.
4375 *
4376 * This means we're guaranteed that "remain_length" is positive.
4377 */
4378 remain_length = tvb_ensure_captured_length_remaining(packet_tvb, offset);
4379 /*
4380 * Can we do reassembly?
4381 */
4382 if (ssh_desegment && pinfo->can_desegment) {
4383 /*
4384 * Yes - would an SSH header starting at this offset
4385 * be split across segment boundaries?
4386 */
4387 if (remain_length < 4) {
4388 /*
4389 * Yes. Tell the TCP dissector where the data for
4390 * this message starts in the data it handed us and
4391 * that we need "some more data." Don't tell it
4392 * exactly how many bytes we need because if/when we
4393 * ask for even more (after the header) that will
4394 * break reassembly.
4395 */
4396 pinfo->desegment_offset = offset;
4397 pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT0x0fffffff;
4398 return offset;
4399 }
4400 }
4401 /* XXX - Defragmentation needs to be done in ssh_decrypt_packet, and the
4402 * checks there should mean that the above never has an effect. (It's
4403 * copied from ssh_dissect_key_exchange.)
4404 */
4405 plen = tvb_get_ntohl(packet_tvb, offset);
4406
4407 if (ssh_desegment && pinfo->can_desegment) {
4408 if (plen + 4 > remain_length) {
4409 pinfo->desegment_offset = offset;
4410 pinfo->desegment_len = plen+4 - remain_length;
4411 return offset;
4412 }
4413 }
4414 /*
4415 * Need to check plen > 0x80000000 here
4416 */
4417
4418 ti = proto_tree_add_uint(tree, hf_ssh_packet_length, packet_tvb,
4419 offset, 4, plen);
4420 if (plen < 8) {
4421 /* RFC 4253 6: "[T]he length of the concatenation of 'packet_length',
4422 * 'padding_length', 'payload', and 'random padding' MUST be a multiple
4423 * of the cipher block size or 8, whichever is larger,... even when
4424 * using stream ciphers."
4425 *
4426 * Modes that do not encrypt plen with the same key as the other three
4427 * cannot follow this as written and delete 'packet_length' from the
4428 * above sentence. As padding_length is one byte and random_padding at
4429 * least four, packet_length must be at least 8 in all modes.
4430 */
4431 expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Packet length is %d, MUST be at least 8", plen);
4432 } else if (plen >= SSH_MAX_PACKET_LEN32768) {
4433 expert_add_info_format(pinfo, ti, &ei_ssh_packet_length, "Overly large number %d", plen);
4434 plen = remain_length-4;
4435 }
4436 offset+=4;
4437
4438 /* padding length */
4439 padding_ti = proto_tree_add_item_ret_uint(tree, hf_ssh_padding_length, packet_tvb, offset, 1, ENC_NA0x00000000, &padding_length);
4440 /* RFC 4253 6: "There MUST be at least four bytes of padding." */
4441 if (padding_length < 4) {
4442 expert_add_info_format(pinfo, padding_ti, &ei_ssh_padding_length, "Padding length is %d, MUST be at least 4", padding_length);
4443 }
4444 unsigned payload_length;
4445 if (ckd_sub(&payload_length, plen, padding_length + 1)__builtin_sub_overflow((plen), (padding_length + 1), (&payload_length
))) {
4446 expert_add_info_format(pinfo, padding_ti, &ei_ssh_padding_length, "Padding length is too large [%d], implies a negative payload length", padding_length);
4447 payload_length = 0;
4448 }
4449 offset += 1;
4450
4451 /* msg_code */
4452 msg_code = tvb_get_uint8(packet_tvb, offset);
4453 /* XXX - Payload compression could have been negotiated */
4454 payload_tvb = tvb_new_subset_length(packet_tvb, offset, (int)payload_length);
4455 bool_Bool is_response = ssh_peer_data_from_server(peer_data);
4456
4457 /* Transport layer protocol */
4458 /* Generic (1-19) */
4459 if(msg_code >= 1 && msg_code <= 19) {
4460 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4461 msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Transport (generic)");
4462 proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4463 dissected_len = ssh_dissect_transport_generic(payload_tvb, pinfo, 1, peer_data, msg_type_tree, msg_code);
4464 }
4465 /* Algorithm negotiation (20-29) */
4466 /* Normally these messages are all dissected in ssh_dissect_key_exchange */
4467 else if(msg_code >=20 && msg_code <= 29) {
4468//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);
4469
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: Transport (algorithm negotiation)");
4472 proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4473 dissected_len = 1;
4474
4475 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"
, 4475, __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);
4476 switch(msg_code)
4477 {
4478 case SSH_MSG_KEXINIT20:
4479 {
4480 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"
, 4480, __func__, "ssh: REKEY msg_code 20: storing frame %u number, offset %d"
, pinfo->num, offset); } } while (0);
4481 peer_data->rekey_trigger_frame = pinfo->num;
4482 // Reset array while REKEY: sanitize server_key_exchange_init and force do_decrypt :
4483 peer_data->global_data->kex_server_key_exchange_init = wmem_array_new(wmem_file_scope(), 1);
4484 peer_data->global_data->do_decrypt = true1;
4485 dissected_len = ssh_dissect_key_init(payload_tvb, pinfo, offset - 4, msg_type_tree, is_response, peer_data->global_data);
4486 break;
4487 }
4488 case SSH_MSG_NEWKEYS21:
4489 {
4490 if (peer_data->rekey_pending) {
4491 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"
, 4491, __func__, "ssh: REKEY pending... NEWKEYS frame %u", pinfo
->num); } } while (0);
4492 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"
, 4492, __func__, "ssh: decrypting frame %u with key ID %u, seq=%u"
, pinfo->num, peer_data->cipher_id, peer_data->sequence_number
); } } while (0);
4493 if (peer_data->global_data->ext_kex_strict) {
4494 peer_data->sequence_number = 0;
4495 ssh_debug_printf("%s->sequence_number reset to 0 (Strict KEX)\n", is_response ? "server" : "client");
4496 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"
, 4496, __func__, "ssh: REKEY reset %s sequence number to 0 at frame %u (Strict KEX)"
, is_response ? "server" : "client", pinfo->num); } } while
(0);
4497 }
4498 // finalize the rekey (activate the new keys)
4499 if (!is_response) { // Only process client-sent NEWKEYS
4500 // Activate new key material into peer_data->cipher
4501 ssh_debug_printf("Activating new keys for CLIENT => SERVER\n");
4502 ssh_decryption_setup_cipher(peer_data, &peer_data->global_data->new_keys[0], &peer_data->global_data->new_keys[2]);
4503 ssh_decryption_setup_mac(peer_data, &peer_data->global_data->new_keys[4]);
4504 } else { // Only process server-sent NEWKEYS
4505 // Activate new key material into peer_data->cipher
4506 ssh_debug_printf("Activating new keys for SERVER => CLIENT\n");
4507 ssh_decryption_setup_cipher(peer_data, &peer_data->global_data->new_keys[1], &peer_data->global_data->new_keys[3]);
4508 ssh_decryption_setup_mac(peer_data, &peer_data->global_data->new_keys[5]);
4509 }
4510 // Finishing REKEY
4511 peer_data->rekey_pending = false0;
4512 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"
, 4512, __func__, "ssh: REKEY done... switched to NEWKEYS at frame %u"
, pinfo->num); } } while (0);
4513 }
4514 break;
4515 }
4516 }
4517 }
4518 /* Key exchange method specific (reusable) (30-49) */
4519 /* Normally these messages are all dissected in ssh_dissect_key_exchange */
4520 else if (msg_code >=30 && msg_code <= 49) {
4521//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);
4522
4523 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)");
4524 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"
, 4524, __func__, "ssh: rekey KEX_xxx_INIT/KEX_xxx_REPLY detected in frame %u"
, pinfo->num); } } while (0);
4525 peer_data->rekey_pending = true1;
4526 dissected_len = peer_data->global_data->kex_specific_dissector(msg_code, payload_tvb, pinfo, offset -5, msg_type_tree, peer_data->global_data);
4527 }
4528
4529 /* User authentication protocol */
4530 /* Generic (50-59) */
4531 else if (msg_code >= 50 && msg_code <= 59) {
4532 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4533 msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: User Authentication (generic)");
4534 proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4535 dissected_len = ssh_dissect_userauth_generic(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4536 }
4537 /* User authentication method specific (reusable) (60-79) */
4538 else if (msg_code >= 60 && msg_code <= 79) {
4539 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4540 msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: User Authentication: (method specific)");
4541 proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4542 dissected_len = ssh_dissect_userauth_specific(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4543 }
4544
4545 /* Connection protocol */
4546 /* Generic (80-89) */
4547 else if (msg_code >= 80 && msg_code <= 89) {
4548 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4549 msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Connection (generic)");
4550 proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4551 dissected_len = ssh_dissect_connection_generic(payload_tvb, pinfo, 1, msg_type_tree, msg_code);
4552 }
4553 /* Channel related messages (90-127) */
4554 else if (msg_code >= 90 && msg_code <= 127) {
4555 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4556 msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Connection: (channel related message)");
4557 proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4558 dissected_len = ssh_dissect_connection_specific(payload_tvb, pinfo, peer_data, 1, msg_type_tree, msg_code, message);
4559 }
4560
4561 /* Reserved for client protocols (128-191) */
4562 else if (msg_code >= 128 && msg_code <= 191) {
4563 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
4564 msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Client protocol");
4565 proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4566 offset+=1;
4567 // TODO: dissected_len = ssh_dissect_client(payload_tvb, pinfo, global_data, 1, msg_type_tree, is_response, msg_code);
4568 }
4569
4570 /* Local extensions (192-255) */
4571 else if (msg_code >= 192 && msg_code <= 255) {
4572 msg_type_tree = proto_tree_add_subtree(tree, packet_tvb, offset, plen-1, ett_key_exchange, NULL((void*)0), "Message: Local extension");
4573 dissected_len = ssh_dissect_local_extension(payload_tvb, pinfo, 0, peer_data, msg_type_tree, msg_code);
4574 }
4575
4576 /* XXX - ssh_dissect_key_exchange only adds undecoded payload here,
4577 * i.e., tvb_reported_length_remaining(payload_tvb, dissected_len)
4578 */
4579 if (payload_length > 0) {
4580 proto_tree_add_item(msg_type_tree, hf_ssh_payload, packet_tvb, offset, payload_length, ENC_NA0x00000000);
4581 }
4582 if(dissected_len!=(int)payload_length){
4583 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);
4584 }
4585 offset += payload_length;
4586
4587 /* padding */
4588 proto_tree_add_item(tree, hf_ssh_padding_string, packet_tvb, offset, padding_length, ENC_NA0x00000000);
4589 offset += padding_length;
4590
4591 if (peer_data->mac_length > 0) {
4592 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);
4593 offset += peer_data->mac_length;
4594 }
4595 ti = proto_tree_add_uint(tree, hf_ssh_seq_num, tvb, offset, 0, message->sequence_number);
4596 proto_item_set_generated(ti);
4597 return offset;
4598}
4599
4600static int
4601ssh_dissect_transport_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
4602 int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code)
4603{
4604 (void)pinfo;
4605 if(msg_code==SSH_MSG_DISCONNECT1){
4606 proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_reason, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4607 offset += 4;
4608 unsigned nlen;
4609 nlen = tvb_get_ntohl(packet_tvb, offset) ;
4610 proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_description_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4611 offset += 4;
4612 proto_tree_add_item(msg_type_tree, hf_ssh_disconnect_description, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4613 offset += nlen;
4614 nlen = tvb_get_ntohl(packet_tvb, offset) ;
4615 proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4616 offset += 4;
4617 proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4618 offset += nlen;
4619 }else if(msg_code==SSH_MSG_IGNORE2){
4620 offset += ssh_tree_add_string(packet_tvb, offset, msg_type_tree, hf_ssh_ignore_data, hf_ssh_ignore_data_length);
4621 }else if(msg_code==SSH_MSG_DEBUG4){
4622 unsigned slen;
4623 proto_tree_add_item(msg_type_tree, hf_ssh_debug_always_display, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4624 offset += 1;
4625 slen = tvb_get_ntohl(packet_tvb, offset) ;
4626 proto_tree_add_item(msg_type_tree, hf_ssh_debug_message_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4627 offset += 4;
4628 proto_tree_add_item(msg_type_tree, hf_ssh_debug_message, packet_tvb, offset, slen, ENC_UTF_80x00000002);
4629 offset += slen;
4630 slen = tvb_get_ntohl(packet_tvb, offset) ;
4631 proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4632 offset += 4;
4633 proto_tree_add_item(msg_type_tree, hf_ssh_lang_tag, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4634 offset += slen;
4635 }else if(msg_code==SSH_MSG_SERVICE_REQUEST5){
4636 unsigned nlen;
4637 nlen = tvb_get_ntohl(packet_tvb, offset) ;
4638 proto_tree_add_item(msg_type_tree, hf_ssh_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4639 offset += 4;
4640 proto_tree_add_item(msg_type_tree, hf_ssh_service_name, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4641 offset += nlen;
4642 }else if(msg_code==SSH_MSG_SERVICE_ACCEPT6){
4643 unsigned nlen;
4644 nlen = tvb_get_ntohl(packet_tvb, offset) ;
4645 proto_tree_add_item(msg_type_tree, hf_ssh_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4646 offset += 4;
4647 proto_tree_add_item(msg_type_tree, hf_ssh_service_name, packet_tvb, offset, nlen, ENC_ASCII0x00000000);
4648 offset += nlen;
4649 }else if(msg_code==SSH_MSG_EXT_INFO7){
4650 unsigned ext_cnt;
4651 ext_cnt = tvb_get_ntohl(packet_tvb, offset);
4652 proto_tree_add_item(msg_type_tree, hf_ssh_ext_count, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4653 offset += 4;
4654 for(unsigned ext_index = 0; ext_index < ext_cnt; ext_index++) {
4655 offset = ssh_dissect_rfc8308_extension(packet_tvb, pinfo, offset, peer_data, msg_type_tree);
4656 }
4657 }
4658 return offset;
4659}
4660
4661static int
4662ssh_dissect_rfc8308_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
4663 int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree)
4664{
4665 (void)pinfo;
4666 unsigned ext_name_slen = tvb_get_ntohl(packet_tvb, offset);
4667 uint8_t *ext_name = tvb_get_string_enc(pinfo->pool, packet_tvb, offset + 4, ext_name_slen, ENC_ASCII0x00000000);
4668 unsigned ext_value_slen = tvb_get_ntohl(packet_tvb, offset + 4 + ext_name_slen);
4669 unsigned ext_len = 8 + ext_name_slen + ext_value_slen;
4670 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);
4671
4672 proto_tree_add_item(ext_tree, hf_ssh_ext_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4673 offset += 4;
4674 proto_tree_add_item(ext_tree, hf_ssh_ext_name, packet_tvb, offset, ext_name_slen, ENC_ASCII0x00000000);
4675 offset += ext_name_slen;
4676 proto_tree_add_item(ext_tree, hf_ssh_ext_value_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4677 offset += 4;
4678 proto_tree_add_item(ext_tree, hf_ssh_ext_value, packet_tvb, offset, ext_value_slen, ENC_NA0x00000000);
4679
4680 if (g_str_equal(ext_name, "server-sig-algs")(strcmp ((const char *) (ext_name), (const char *) ("server-sig-algs"
)) == 0)) {
4681 // server-sig-algs (RFC8308 Sec. 3.1)
4682 proto_tree_add_item(ext_tree, hf_ssh_ext_server_sig_algs_algorithms, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4683 offset += ext_value_slen;
4684 } else if (g_str_equal(ext_name, "delay-compression")(strcmp ((const char *) (ext_name), (const char *) ("delay-compression"
)) == 0)) {
4685 // delay-compression (RFC8308 Sec 3.2)
4686 unsigned slen;
4687 slen = tvb_get_ntohl(packet_tvb, offset);
4688 proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_client_to_server_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4689 offset += 4;
4690 proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_client_to_server, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4691 offset += slen;
4692 slen = tvb_get_ntohl(packet_tvb, offset);
4693 proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_server_to_client_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4694 offset += 4;
4695 proto_tree_add_item(ext_tree, hf_ssh_ext_delay_compression_algorithms_server_to_client, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4696 offset += slen;
4697 } else if (g_str_equal(ext_name, "no-flow-control")(strcmp ((const char *) (ext_name), (const char *) ("no-flow-control"
)) == 0)) {
4698 // no-flow-control (RFC 8308 Sec 3.3)
4699 proto_tree_add_item(ext_tree, hf_ssh_ext_no_flow_control_value, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4700 offset += ext_value_slen;
4701 } else if (g_str_equal(ext_name, "elevation")(strcmp ((const char *) (ext_name), (const char *) ("elevation"
)) == 0)) {
4702 // elevation (RFC 8308 Sec 3.4)
4703 proto_tree_add_item(ext_tree, hf_ssh_ext_elevation_value, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4704 offset += ext_value_slen;
4705 } else if (g_str_equal(ext_name, "[email protected]")(strcmp ((const char *) (ext_name), (const char *) ("[email protected]"
)) == 0)) {
4706 // [email protected] (proprietary)
4707 proto_tree_add_item(ext_tree, hf_ssh_ext_prop_publickey_algorithms_algorithms, packet_tvb, offset, ext_value_slen, ENC_ASCII0x00000000);
4708 offset += ext_value_slen;
4709 } else if (g_str_equal(ext_name, "[email protected]")(strcmp ((const char *) (ext_name), (const char *) ("[email protected]"
)) == 0)) {
4710 // [email protected] (proprietary w/ primitive extension value)
4711 peer_data->global_data->ext_ping_openssh_offered = true1;
4712 offset += ext_value_slen;
4713 } else {
4714 offset += ext_value_slen;
4715 }
4716
4717 // The following extensions do not require advanced dissection:
4718 // - global-requests-ok
4719 // - ext-auth-info
4720 // - [email protected]
4721 // - [email protected]
4722
4723 return offset;
4724}
4725
4726static int
4727ssh_dissect_userauth_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
4728 int offset, proto_item *msg_type_tree, unsigned msg_code)
4729{
4730 if(msg_code==SSH_MSG_USERAUTH_REQUEST50){
4731 uint32_t slen;
4732 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_user_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4733 offset += 4;
4734 proto_tree_add_item(msg_type_tree, hf_ssh_userauth_user_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4735 offset += slen;
4736 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_service_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4737 offset += 4;
4738 proto_tree_add_item(msg_type_tree, hf_ssh_userauth_service_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4739 offset += slen;
4740 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_method_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4741 offset += 4;
4742 const char* key_type;
4743 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);
4744 offset += slen;
4745 if (0 == strcmp(key_type, "none")) {
4746 }else if (0 == strcmp(key_type, "publickey") || 0 == strcmp(key_type, "[email protected]")) {
4747 uint8_t bHaveSignature = tvb_get_uint8(packet_tvb, offset);
4748 int dissected_len = 0;
4749 proto_tree_add_item(msg_type_tree, hf_ssh_userauth_have_signature, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4750 offset += 1;
4751 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_pka_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4752 offset += 4;
4753 proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4754 offset += slen;
4755 proto_item *ti;
4756 ti = proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_blob_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4757 offset += 4;
4758 dissected_len = ssh_dissect_public_key_blob(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
4759 if(dissected_len!=(int)slen){
4760 expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4761 }
4762 offset += slen;
4763 if (0 == strcmp(key_type, "[email protected]")) {
4764 // Host key - but should we add it to global data or not?
4765 offset += ssh_tree_add_hostkey(packet_tvb, pinfo, offset, msg_type_tree, "Server host key",
4766 ett_key_exchange_host_key, NULL((void*)0));
4767 }
4768 if(bHaveSignature){
4769 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_signature_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4770 offset += 4;
4771 proto_item *signature_tree = NULL((void*)0);
4772 signature_tree = proto_tree_add_subtree(msg_type_tree, packet_tvb, offset, slen, ett_userauth_pk_signature, NULL((void*)0), "Public key signature");
4773 dissected_len = ssh_dissect_public_key_signature(packet_tvb, pinfo, offset, signature_tree) - offset;
4774 if(dissected_len!=(int)slen){
4775 expert_add_info_format(pinfo, signature_tree, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4776 }
4777 offset += slen;
4778 }
4779 }else if (0 == strcmp(key_type, "password")) {
4780 uint8_t bChangePassword = tvb_get_uint8(packet_tvb, offset);
4781 proto_tree_add_item(msg_type_tree, hf_ssh_userauth_change_password, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4782 offset += 1;
4783 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_password_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4784 offset += 4;
4785 proto_tree_add_item(msg_type_tree, hf_ssh_userauth_password, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4786 offset += slen;
4787 if(bChangePassword){
4788 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_userauth_new_password_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4789 offset += 4;
4790 proto_tree_add_item(msg_type_tree, hf_ssh_userauth_new_password, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4791 offset += slen;
4792 }
4793 }else{
4794 }
4795
4796 }else if(msg_code==SSH_MSG_USERAUTH_FAILURE51){
4797 unsigned slen;
4798 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_auth_failure_list_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4799 offset += 4;
4800 proto_tree_add_item(msg_type_tree, hf_ssh_auth_failure_list, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4801 offset += slen;
4802 proto_tree_add_item(msg_type_tree, hf_ssh_userauth_partial_success, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
4803 offset += 1;
4804 }
4805 return offset;
4806}
4807
4808static int
4809ssh_dissect_userauth_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
4810 int offset, proto_item *msg_type_tree, unsigned msg_code)
4811{
4812 if(msg_code==SSH_MSG_USERAUTH_PK_OK60){
4813 proto_item *ti;
4814 int dissected_len = 0;
4815 unsigned slen;
4816 slen = tvb_get_ntohl(packet_tvb, offset) ;
4817 proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
4818 offset += 4;
4819 proto_tree_add_item(msg_type_tree, hf_ssh_userauth_pka_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
4820 offset += slen;
4821 ti = proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_blob_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
4822 offset += 4;
4823 dissected_len = ssh_dissect_public_key_blob(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
4824 if(dissected_len!=(int)slen){
4825 expert_add_info_format(pinfo, ti, &ei_ssh_packet_decode, "Decoded %d bytes, but packet length is %d bytes", dissected_len, slen);
4826 }
4827 offset += slen;
4828 }
4829 return offset;
4830}
4831
4832static void
4833ssh_process_payload(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, ssh_channel_info_t *channel)
4834{
4835 tvbuff_t *next_tvb = tvb_new_subset_remaining(tvb, offset);
4836 if (channel->handle) {
4837 call_dissector(channel->handle, next_tvb, pinfo, proto_tree_get_root(tree));
4838 } else {
4839 call_data_dissector(next_tvb, pinfo, proto_tree_get_root(tree));
4840 }
4841}
4842
4843static void
4844print_ssh_fragment_tree(fragment_head *ipfd_head, proto_tree *tree, proto_tree *ssh_tree, packet_info *pinfo, tvbuff_t *next_tvb)
4845{
4846 proto_item *ssh_tree_item, *frag_tree_item;
4847
4848 /*
4849 * The subdissector thought it was completely
4850 * desegmented (although the stuff at the
4851 * end may, in turn, require desegmentation),
4852 * so we show a tree with all segments.
4853 */
4854 show_fragment_tree(ipfd_head, &ssh_segment_items,
4855 tree, pinfo, next_tvb, &frag_tree_item);
4856 /*
4857 * The toplevel fragment subtree is now
4858 * behind all desegmented data; move it
4859 * right behind the SSH tree.
4860 */
4861 ssh_tree_item = proto_tree_get_parent(ssh_tree);
4862 /* The SSH protocol item is up a few levels from the message tree */
4863 ssh_tree_item = proto_item_get_parent_nth(ssh_tree_item, 2);
4864 if (frag_tree_item && ssh_tree_item) {
4865 proto_tree_move_item(tree, ssh_tree_item, frag_tree_item);
4866 }
4867}
4868
4869static uint32_t
4870ssh_msp_fragment_id(struct tcp_multisegment_pdu *msp)
4871{
4872 /*
4873 * If a frame contains multiple PDUs, then "first_frame" is not
4874 * sufficient to uniquely identify groups of fragments. Therefore we use
4875 * the tcp reassembly functions that also test msp->seq (the position of
4876 * the initial fragment in the SSH channel).
4877 */
4878 return msp->first_frame;
4879}
4880
4881static void
4882ssh_proto_tree_add_segment_data(
4883 proto_tree *tree,
4884 tvbuff_t *tvb,
4885 int offset,
4886 int length,
4887 const char *prefix)
4888{
4889 proto_tree_add_bytes_format(
4890 tree,
4891 hf_ssh_segment_data,
4892 tvb,
4893 offset,
4894 length,
4895 NULL((void*)0),
4896 "%sSSH segment data (%u %s)",
4897 prefix != NULL((void*)0) ? prefix : "",
4898 length,
4899 plurality(length, "byte", "bytes")((length) == 1 ? ("byte") : ("bytes")));
4900}
4901
4902static void
4903desegment_ssh(tvbuff_t *tvb, packet_info *pinfo, uint32_t seq,
4904 uint32_t nxtseq, proto_tree *tree, ssh_channel_info_t *channel)
4905{
4906 fragment_head *ipfd_head;
4907 bool_Bool must_desegment;
4908 bool_Bool called_dissector;
4909 unsigned another_pdu_follows;
4910 bool_Bool another_segment_in_frame = false0;
4911 int deseg_offset, offset = 0;
4912 uint32_t deseg_seq;
4913 int nbytes;
4914 proto_item *item;
4915 struct tcp_multisegment_pdu *msp;
4916 bool_Bool first_pdu = true1;
4917
4918again:
4919 ipfd_head = NULL((void*)0);
4920 must_desegment = false0;
4921 called_dissector = false0;
4922 another_pdu_follows = 0;
4923 msp = NULL((void*)0);
4924
4925 /*
4926 * Initialize these to assume no desegmentation.
4927 * If that's not the case, these will be set appropriately
4928 * by the subdissector.
4929 */
4930 pinfo->desegment_offset = 0;
4931 pinfo->desegment_len = 0;
4932
4933 /*
4934 * Initialize this to assume that this segment will just be
4935 * added to the middle of a desegmented chunk of data, so
4936 * that we should show it all as data.
4937 * If that's not the case, it will be set appropriately.
4938 */
4939 deseg_offset = offset;
4940
4941 /* If we've seen this segment before (e.g., it's a retransmission),
4942 * there's nothing for us to do. Certainly, don't add it to the list
4943 * of multisegment_pdus (that would cause subsequent lookups to find
4944 * the retransmission instead of the original transmission, breaking
4945 * dissection of the desegmented pdu if we'd already seen the end of
4946 * the pdu).
4947 */
4948 if ((msp = (struct tcp_multisegment_pdu *)wmem_tree_lookup32(channel->multisegment_pdus, seq))) {
4949 const char *prefix;
4950 bool_Bool is_retransmission = false0;
4951
4952 if (msp->first_frame == pinfo->num) {
4953 /* This must be after the first pass. */
4954 prefix = "";
4955 if (msp->last_frame == pinfo->num) {
4956 col_clear(pinfo->cinfo, COL_INFO);
4957 } else {
4958 if (first_pdu) {
4959 col_append_sep_str(pinfo->cinfo, COL_INFO, " ", "[SSH segment of a reassembled PDU]");
4960 }
4961 }
4962 } else {
4963 prefix = "Retransmitted ";
4964 is_retransmission = true1;
4965 }
4966
4967 if (!is_retransmission) {
4968 ipfd_head = fragment_get(&ssh_reassembly_table, pinfo, msp->first_frame, msp);
4969 if (ipfd_head != NULL((void*)0) && ipfd_head->reassembled_in !=0 &&
4970 ipfd_head->reassembled_in != pinfo->num) {
4971 /* Show what frame this was reassembled in if not this one. */
4972 item=proto_tree_add_uint(tree, *ssh_segment_items.hf_reassembled_in,
4973 tvb, 0, 0, ipfd_head->reassembled_in);
4974 proto_item_set_generated(item);
4975 }
4976 }
4977 nbytes = tvb_reported_length_remaining(tvb, offset);
4978 ssh_proto_tree_add_segment_data(tree, tvb, offset, nbytes, prefix);
4979 return;
4980 }
4981
4982 /* Else, find the most previous PDU starting before this sequence number */
4983 msp = (struct tcp_multisegment_pdu *)wmem_tree_lookup32_le(channel->multisegment_pdus, seq-1);
4984 if (msp && msp->seq <= seq && msp->nxtpdu > seq) {
4985 unsigned len;
4986
4987 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
4988 msp->last_frame = pinfo->num;
4989 msp->last_frame_time = pinfo->abs_ts;
4990 }
4991
4992 /* OK, this PDU was found, which means the segment continues
4993 * a higher-level PDU and that we must desegment it.
4994 */
4995 if (msp->flags & MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001) {
4996 /* The dissector asked for the entire segment */
4997 len = tvb_reported_length_remaining(tvb, offset);
4998 } else {
4999 len = MIN(nxtseq, msp->nxtpdu)(((nxtseq) < (msp->nxtpdu)) ? (nxtseq) : (msp->nxtpdu
)) - seq;
5000 }
5001
5002 ipfd_head = fragment_add(&ssh_reassembly_table, tvb, offset,
5003 pinfo, ssh_msp_fragment_id(msp), msp,
5004 seq - msp->seq,
5005 len, (LT_SEQ (nxtseq,msp->nxtpdu)((int32_t)((nxtseq) - (msp->nxtpdu)) < 0)));
5006
5007 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)
5008 && msp->flags & MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001) {
5009 msp->flags &= (~MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001);
5010
5011 /* If we consumed the entire segment there is no
5012 * other pdu starting anywhere inside this segment.
5013 * So update nxtpdu to point at least to the start
5014 * of the next segment.
5015 * (If the subdissector asks for even more data we
5016 * will advance nxtpdu even further later down in
5017 * the code.)
5018 */
5019 msp->nxtpdu = nxtseq;
5020 }
5021
5022 if ( (msp->nxtpdu < nxtseq)
5023 && (msp->nxtpdu >= seq)
5024 && (len > 0)) {
5025 another_pdu_follows = msp->nxtpdu - seq;
5026 }
5027 } else {
5028 /* This segment was not found in our table, so it doesn't
5029 * contain a continuation of a higher-level PDU.
5030 * Call the normal subdissector.
5031 */
5032 ssh_process_payload(tvb, offset, pinfo, tree, channel);
5033 called_dissector = true1;
5034
5035 /* Did the subdissector ask us to desegment some more data
5036 * before it could handle the packet?
5037 * If so we have to create some structures in our table but
5038 * this is something we only do the first time we see this
5039 * packet.
5040 */
5041 if (pinfo->desegment_len) {
5042 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))
5043 must_desegment = true1;
5044
5045 /*
5046 * Set "deseg_offset" to the offset in "tvb"
5047 * of the first byte of data that the
5048 * subdissector didn't process.
5049 */
5050 deseg_offset = offset + pinfo->desegment_offset;
5051 }
5052
5053 /* Either no desegmentation is necessary, or this is
5054 * segment contains the beginning but not the end of
5055 * a higher-level PDU and thus isn't completely
5056 * desegmented.
5057 */
5058 ipfd_head = NULL((void*)0);
5059 }
5060
5061 /* is it completely desegmented? */
5062 if (ipfd_head && ipfd_head->reassembled_in == pinfo->num) {
5063 /*
5064 * Yes, we think it is.
5065 * We only call subdissector for the last segment.
5066 * Note that the last segment may include more than what
5067 * we needed.
5068 */
5069 if (nxtseq < msp->nxtpdu) {
5070 /*
5071 * This is *not* the last segment. It is part of a PDU in the same
5072 * frame, so no another PDU can follow this one.
5073 * Do not reassemble SSH yet, it will be done in the final segment.
5074 * (If we are reassembling at FIN, we will do that in dissect_ssl()
5075 * after iterating through all the records.)
5076 * Clear the Info column and avoid displaying [SSH segment of a
5077 * reassembled PDU], the payload dissector will typically set it.
5078 * (This is needed here for the second pass.)
5079 */
5080 another_pdu_follows = 0;
5081 col_clear(pinfo->cinfo, COL_INFO);
5082 another_segment_in_frame = true1;
5083 } else {
5084 /*
5085 * OK, this is the last segment of the PDU and also the
5086 * last segment in this frame.
5087 * Let's call the subdissector with the desegmented
5088 * data.
5089 */
5090 tvbuff_t *next_tvb;
5091 int old_len;
5092
5093 /*
5094 * Reset column in case multiple SSH segments form the PDU
5095 * and this last SSH segment is not in the first TCP segment of
5096 * this frame.
5097 * XXX prevent clearing the column if the last layer is not SSH?
5098 */
5099 /* Clear column during the first pass. */
5100 col_clear(pinfo->cinfo, COL_INFO);
5101
5102 /* create a new TVB structure for desegmented data */
5103 next_tvb = tvb_new_chain(tvb, ipfd_head->tvb_data);
5104
5105 /* add desegmented data to the data source list */
5106 add_new_data_source(pinfo, next_tvb, "Reassembled SSH");
5107
5108 /* call subdissector */
5109 ssh_process_payload(next_tvb, 0, pinfo, tree, channel);
5110 called_dissector = true1;
5111
5112 /*
5113 * OK, did the subdissector think it was completely
5114 * desegmented, or does it think we need even more
5115 * data?
5116 */
5117 old_len = (int)(tvb_reported_length(next_tvb) - tvb_reported_length_remaining(tvb, offset));
5118 if (pinfo->desegment_len && pinfo->desegment_offset <= old_len) {
5119 /*
5120 * "desegment_len" isn't 0, so it needs more
5121 * data for something - and "desegment_offset"
5122 * is before "old_len", so it needs more data
5123 * to dissect the stuff we thought was
5124 * completely desegmented (as opposed to the
5125 * stuff at the beginning being completely
5126 * desegmented, but the stuff at the end
5127 * being a new higher-level PDU that also
5128 * needs desegmentation).
5129 */
5130 fragment_set_partial_reassembly(&ssh_reassembly_table,
5131 pinfo, ssh_msp_fragment_id(msp), msp);
5132 /* Update msp->nxtpdu to point to the new next
5133 * pdu boundary.
5134 */
5135 if (pinfo->desegment_len == DESEGMENT_ONE_MORE_SEGMENT0x0fffffff) {
5136 /* We want reassembly of at least one
5137 * more segment so set the nxtpdu
5138 * boundary to one byte into the next
5139 * segment.
5140 * This means that the next segment
5141 * will complete reassembly even if it
5142 * is only one single byte in length.
5143 */
5144 msp->nxtpdu = seq + tvb_reported_length_remaining(tvb, offset) + 1;
5145 msp->flags |= MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001;
5146 } else if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5147 /* This is not the first segment, and we thought reassembly
5148 * would be done now, but now we know we desegment at FIN.
5149 * E.g., a HTTP response where the headers were split
5150 * across segments (so previous ONE_MORE_SEGMENT) and
5151 * also no Content-Length (so now DESEGMENT_UNTIL_FIN).
5152 */
5153 channel->flags |= TCP_FLOW_REASSEMBLE_UNTIL_FIN0x0001;
5154 msp->nxtpdu = nxtseq + 0x40000000;
5155 } else {
5156 msp->nxtpdu = seq + tvb_reported_length_remaining(tvb, offset) + pinfo->desegment_len;
5157 }
5158 /* Since we need at least some more data
5159 * there can be no pdu following in the
5160 * tail of this segment.
5161 */
5162 another_pdu_follows = 0;
5163 } else {
5164 /*
5165 * Show the stuff in this TCP segment as
5166 * just raw TCP segment data.
5167 */
5168 nbytes = another_pdu_follows > 0
5169 ? another_pdu_follows
5170 : tvb_reported_length_remaining(tvb, offset);
5171 ssh_proto_tree_add_segment_data(tree, tvb, offset, nbytes, NULL((void*)0));
5172
5173 /* Show details of the reassembly */
5174 print_ssh_fragment_tree(ipfd_head, proto_tree_get_root(tree), tree, pinfo, next_tvb);
5175
5176 /* Did the subdissector ask us to desegment
5177 * some more data? This means that the data
5178 * at the beginning of this segment completed
5179 * a higher-level PDU, but the data at the
5180 * end of this segment started a higher-level
5181 * PDU but didn't complete it.
5182 *
5183 * If so, we have to create some structures
5184 * in our table, but this is something we
5185 * only do the first time we see this packet.
5186 */
5187 if (pinfo->desegment_len) {
5188 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))
5189 must_desegment = true1;
5190
5191 /* The stuff we couldn't dissect
5192 * must have come from this segment,
5193 * so it's all in "tvb".
5194 *
5195 * "pinfo->desegment_offset" is
5196 * relative to the beginning of
5197 * "next_tvb"; we want an offset
5198 * relative to the beginning of "tvb".
5199 *
5200 * First, compute the offset relative
5201 * to the *end* of "next_tvb" - i.e.,
5202 * the number of bytes before the end
5203 * of "next_tvb" at which the
5204 * subdissector stopped. That's the
5205 * length of "next_tvb" minus the
5206 * offset, relative to the beginning
5207 * of "next_tvb, at which the
5208 * subdissector stopped.
5209 */
5210 deseg_offset = ipfd_head->datalen - pinfo->desegment_offset;
5211
5212 /* "tvb" and "next_tvb" end at the
5213 * same byte of data, so the offset
5214 * relative to the end of "next_tvb"
5215 * of the byte at which we stopped
5216 * is also the offset relative to
5217 * the end of "tvb" of the byte at
5218 * which we stopped.
5219 *
5220 * Convert that back into an offset
5221 * relative to the beginning of
5222 * "tvb", by taking the length of
5223 * "tvb" and subtracting the offset
5224 * relative to the end.
5225 */
5226 deseg_offset = tvb_reported_length(tvb) - deseg_offset;
5227 }
5228 }
5229 }
5230 }
5231
5232 if (must_desegment) {
5233 /* If the dissector requested "reassemble until FIN"
5234 * just set this flag for the flow and let reassembly
5235 * proceed at normal. We will check/pick up these
5236 * reassembled PDUs later down in dissect_tcp() when checking
5237 * for the FIN flag.
5238 */
5239 if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5240 channel->flags |= TCP_FLOW_REASSEMBLE_UNTIL_FIN0x0001;
5241 }
5242 /*
5243 * The sequence number at which the stuff to be desegmented
5244 * starts is the sequence number of the byte at an offset
5245 * of "deseg_offset" into "tvb".
5246 *
5247 * The sequence number of the byte at an offset of "offset"
5248 * is "seq", i.e. the starting sequence number of this
5249 * segment, so the sequence number of the byte at
5250 * "deseg_offset" is "seq + (deseg_offset - offset)".
5251 */
5252 deseg_seq = seq + (deseg_offset - offset);
5253
5254 if (((nxtseq - deseg_seq) <= 1024*1024)
5255 && (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited))) {
5256 if (pinfo->desegment_len == DESEGMENT_ONE_MORE_SEGMENT0x0fffffff) {
5257 /* The subdissector asked to reassemble using the
5258 * entire next segment.
5259 * Just ask reassembly for one more byte
5260 * but set this msp flag so we can pick it up
5261 * above.
5262 */
5263 msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5264 deseg_seq, nxtseq+1, channel->multisegment_pdus);
5265 msp->flags |= MSP_FLAGS_REASSEMBLE_ENTIRE_SEGMENT0x00000001;
5266 } else if (pinfo->desegment_len == DESEGMENT_UNTIL_FIN0x0ffffffe) {
5267 /* Set nxtseq very large so that reassembly won't happen
5268 * until we force it at the end of the stream in dissect_ssl()
5269 * outside this function.
5270 */
5271 msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5272 deseg_seq, nxtseq+0x40000000, channel->multisegment_pdus);
5273 } else {
5274 msp = pdu_store_sequencenumber_of_next_pdu(pinfo,
5275 deseg_seq, nxtseq+pinfo->desegment_len, channel->multisegment_pdus);
5276 }
5277
5278 /* add this segment as the first one for this new pdu */
5279 fragment_add(&ssh_reassembly_table, tvb, deseg_offset,
5280 pinfo, ssh_msp_fragment_id(msp), msp,
5281 0, nxtseq - deseg_seq,
5282 LT_SEQ(nxtseq, msp->nxtpdu)((int32_t)((nxtseq) - (msp->nxtpdu)) < 0));
5283 }
5284 }
5285
5286 if (!called_dissector || pinfo->desegment_len != 0) {
5287 if (ipfd_head != NULL((void*)0) && ipfd_head->reassembled_in != 0 &&
5288 ipfd_head->reassembled_in != pinfo->num &&
5289 !(ipfd_head->flags & FD_PARTIAL_REASSEMBLY0x0040)) {
5290 /*
5291 * We know what other frame this PDU is reassembled in;
5292 * let the user know.
5293 */
5294 item=proto_tree_add_uint(tree, *ssh_segment_items.hf_reassembled_in,
5295 tvb, 0, 0, ipfd_head->reassembled_in);
5296 proto_item_set_generated(item);
5297 }
5298
5299 /*
5300 * Either we didn't call the subdissector at all (i.e.,
5301 * this is a segment that contains the middle of a
5302 * higher-level PDU, but contains neither the beginning
5303 * nor the end), or the subdissector couldn't dissect it
5304 * all, as some data was missing (i.e., it set
5305 * "pinfo->desegment_len" to the amount of additional
5306 * data it needs).
5307 */
5308 if (!another_segment_in_frame && pinfo->desegment_offset == 0) {
5309 /*
5310 * It couldn't, in fact, dissect any of it (the
5311 * first byte it couldn't dissect is at an offset
5312 * of "pinfo->desegment_offset" from the beginning
5313 * of the payload, and that's 0).
5314 * Just mark this as SSH.
5315 */
5316
5317 /* SFTP checks the length before setting the protocol column.
5318 * If other subdissectors don't do this, we'd want to set the
5319 * protocol column back - but we want to get the SSH version
5320 */
5321 //col_set_str(pinfo->cinfo, COL_PROTOCOL,
5322 // val_to_str_const(session->version, ssl_version_short_names, "SSH"));
5323 if (first_pdu) {
5324 col_append_sep_str(pinfo->cinfo, COL_INFO, " ", "[SSH segment of a reassembled PDU]");
5325 }
5326 }
5327
5328 /*
5329 * Show what's left in the packet as just raw SSH segment data.
5330 * XXX - remember what protocol the last subdissector
5331 * was, and report it as a continuation of that, instead?
5332 */
5333 nbytes = tvb_reported_length_remaining(tvb, deseg_offset);
5334 ssh_proto_tree_add_segment_data(tree, tvb, deseg_offset, nbytes, NULL((void*)0));
5335 }
5336 pinfo->can_desegment = 0;
5337 pinfo->desegment_offset = 0;
5338 pinfo->desegment_len = 0;
5339
5340 if (another_pdu_follows) {
5341 /* there was another pdu following this one. */
5342 pinfo->can_desegment=2;
5343 /* we also have to prevent the dissector from changing the
5344 * PROTOCOL and INFO columns since what follows may be an
5345 * incomplete PDU and we don't want it be changed back from
5346 * <Protocol> to <SSH>
5347 */
5348 col_set_fence(pinfo->cinfo, COL_INFO);
5349 col_set_writable(pinfo->cinfo, COL_PROTOCOL, false0);
5350 first_pdu = false0;
5351 offset += another_pdu_follows;
5352 seq += another_pdu_follows;
5353 goto again;
5354 }
5355}
5356
5357static void
5358ssh_dissect_channel_data(tvbuff_t *tvb, packet_info *pinfo,
5359 struct ssh_peer_data *peer_data _U___attribute__((unused)), proto_tree *tree,
5360 ssh_message_info_t *message _U___attribute__((unused)), ssh_channel_info_t *channel)
5361{
5362
5363 uint16_t save_can_desegment = pinfo->can_desegment;
5364
5365 if (ssh_desegment) {
5366 pinfo->can_desegment = 2;
5367 desegment_ssh(tvb, pinfo, message->byte_seq, message->next_byte_seq, tree, channel);
5368 } else {
5369 pinfo->can_desegment = 0;
5370 bool_Bool save_fragmented = pinfo->fragmented;
5371 pinfo->fragmented = true1;
5372
5373 ssh_process_payload(tvb, 0, pinfo, tree, channel);
5374 pinfo->fragmented = save_fragmented;
5375 }
5376
5377 pinfo->can_desegment = save_can_desegment;
5378}
5379
5380static int
5381ssh_dissect_term_modes(tvbuff_t *tvb, packet_info *pinfo _U___attribute__((unused)), proto_tree *tree)
5382{
5383 proto_item *ti;
5384 proto_tree *term_mode_tree, *subtree;
5385 unsigned offset = 0;
5386 uint32_t opcode, value, idx;
5387 bool_Bool boolval;
5388
5389 struct tty_opt_info {
5390 unsigned id;
5391 int *hfindex;
5392 };
5393 static const struct tty_opt_info tty_opts[] = {
5394 { SSH_TTY_OP_END0, NULL((void*)0)},
5395 { SSH_TTY_OP_VINTR1, &hf_ssh_pty_term_mode_vintr },
5396 { SSH_TTY_OP_VQUIT2, &hf_ssh_pty_term_mode_vquit },
5397 { SSH_TTY_OP_VERASE3, &hf_ssh_pty_term_mode_verase },
5398 { SSH_TTY_OP_VKILL4, &hf_ssh_pty_term_mode_vkill },
5399 { SSH_TTY_OP_VEOF5, &hf_ssh_pty_term_mode_veof },
5400 { SSH_TTY_OP_VEOL6, &hf_ssh_pty_term_mode_veol },
5401 { SSH_TTY_OP_VEOL27, &hf_ssh_pty_term_mode_veol2 },
5402 { SSH_TTY_OP_VSTART8, &hf_ssh_pty_term_mode_vstart },
5403 { SSH_TTY_OP_VSTOP9, &hf_ssh_pty_term_mode_vstop },
5404 { SSH_TTY_OP_VSUSP10, &hf_ssh_pty_term_mode_vsusp },
5405 { SSH_TTY_OP_VDSUSP11, &hf_ssh_pty_term_mode_vdsusp },
5406 { SSH_TTY_OP_VREPRINT12, &hf_ssh_pty_term_mode_vreprint },
5407 { SSH_TTY_OP_VWERASE13, &hf_ssh_pty_term_mode_vwerase },
5408 { SSH_TTY_OP_VLNEXT14, &hf_ssh_pty_term_mode_vlnext },
5409 { SSH_TTY_OP_VFLUSH15, &hf_ssh_pty_term_mode_vflush },
5410 { SSH_TTY_OP_VSWTCH16, &hf_ssh_pty_term_mode_vswtch },
5411 { SSH_TTY_OP_VSTATUS17, &hf_ssh_pty_term_mode_vstatus },
5412 { SSH_TTY_OP_VDISCARD18, &hf_ssh_pty_term_mode_vdiscard },
5413 { SSH_TTY_OP_IGNPAR30, &hf_ssh_pty_term_mode_ignpar },
5414 { SSH_TTY_OP_PARMRK31, &hf_ssh_pty_term_mode_parmrk },
5415 { SSH_TTY_OP_INPCK32, &hf_ssh_pty_term_mode_inpck },
5416 { SSH_TTY_OP_ISTRIP33, &hf_ssh_pty_term_mode_istrip },
5417 { SSH_TTY_OP_INLCR34, &hf_ssh_pty_term_mode_inlcr },
5418 { SSH_TTY_OP_IGNCR35, &hf_ssh_pty_term_mode_igncr },
5419 { SSH_TTY_OP_ICRNL36, &hf_ssh_pty_term_mode_icrnl },
5420 { SSH_TTY_OP_IUCLC37, &hf_ssh_pty_term_mode_iuclc },
5421 { SSH_TTY_OP_IXON38, &hf_ssh_pty_term_mode_ixon },
5422 { SSH_TTY_OP_IXANY39, &hf_ssh_pty_term_mode_ixany },
5423 { SSH_TTY_OP_IXOFF40, &hf_ssh_pty_term_mode_ixoff },
5424 { SSH_TTY_OP_IMAXBEL41, &hf_ssh_pty_term_mode_imaxbel },
5425 { SSH_TTY_OP_IUTF842, &hf_ssh_pty_term_mode_iutf8 },
5426 { SSH_TTY_OP_ISIG50, &hf_ssh_pty_term_mode_isig },
5427 { SSH_TTY_OP_ICANON51, &hf_ssh_pty_term_mode_icanon },
5428 { SSH_TTY_OP_XCASE52, &hf_ssh_pty_term_mode_xcase },
5429 { SSH_TTY_OP_ECHO53, &hf_ssh_pty_term_mode_echo },
5430 { SSH_TTY_OP_ECHOE54, &hf_ssh_pty_term_mode_echoe },
5431 { SSH_TTY_OP_ECHOK55, &hf_ssh_pty_term_mode_echok },
5432 { SSH_TTY_OP_ECHONL56, &hf_ssh_pty_term_mode_echonl },
5433 { SSH_TTY_OP_NOFLSH57, &hf_ssh_pty_term_mode_noflsh },
5434 { SSH_TTY_OP_TOSTOP58, &hf_ssh_pty_term_mode_tostop },
5435 { SSH_TTY_OP_IEXTEN59, &hf_ssh_pty_term_mode_iexten },
5436 { SSH_TTY_OP_ECHOCTL60, &hf_ssh_pty_term_mode_echoctl },
5437 { SSH_TTY_OP_ECHOKE61, &hf_ssh_pty_term_mode_echoke },
5438 { SSH_TTY_OP_PENDIN62, &hf_ssh_pty_term_mode_pendin },
5439 { SSH_TTY_OP_OPOST70, &hf_ssh_pty_term_mode_opost },
5440 { SSH_TTY_OP_OLCUC71, &hf_ssh_pty_term_mode_olcuc },
5441 { SSH_TTY_OP_ONLCR72, &hf_ssh_pty_term_mode_onlcr },
5442 { SSH_TTY_OP_OCRNL73, &hf_ssh_pty_term_mode_ocrnl },
5443 { SSH_TTY_OP_ONOCR74, &hf_ssh_pty_term_mode_onocr },
5444 { SSH_TTY_OP_ONLRET75, &hf_ssh_pty_term_mode_onlret },
5445 { SSH_TTY_OP_CS790, &hf_ssh_pty_term_mode_cs7 },
5446 { SSH_TTY_OP_CS891, &hf_ssh_pty_term_mode_cs8 },
5447 { SSH_TTY_OP_PARENB92, &hf_ssh_pty_term_mode_parenb },
5448 { SSH_TTY_OP_PARODD93, &hf_ssh_pty_term_mode_parodd },
5449 { SSH_TTY_OP_ISPEED128, &hf_ssh_pty_term_mode_ispeed },
5450 { SSH_TTY_OP_OSPEED129, &hf_ssh_pty_term_mode_ospeed }
5451 };
5452
5453 ti = proto_tree_add_item(tree, hf_ssh_pty_term_modes, tvb, offset, tvb_reported_length(tvb), ENC_NA0x00000000);
5454 term_mode_tree = proto_item_add_subtree(ti, ett_term_modes);
5455 while (tvb_reported_length_remaining(tvb, offset)) {
5456 ti = proto_tree_add_item(term_mode_tree, hf_ssh_pty_term_mode, tvb, offset, 5, ENC_NA0x00000000);
5457 subtree = proto_item_add_subtree(ti, ett_term_mode);
5458 proto_tree_add_item_ret_uint(subtree, hf_ssh_pty_term_mode_opcode, tvb, offset, 1, ENC_NA0x00000000, &opcode);
5459 proto_item_append_text(ti, ": %s", val_to_str_const(opcode, ssh_tty_op_vals, "Unknown"));
5460 offset += 1;
5461 if (opcode == SSH_TTY_OP_END0) {
5462 break;
5463 }
5464 for (idx = 0; idx < array_length(tty_opts)(sizeof (tty_opts) / sizeof (tty_opts)[0]); idx++) {
5465 if (tty_opts[idx].id == opcode) break;
5466 }
5467 if (idx >= array_length(tty_opts)(sizeof (tty_opts) / sizeof (tty_opts)[0])) {
5468 proto_tree_add_item_ret_uint(subtree, hf_ssh_pty_term_mode_value, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &value);
5469 proto_item_append_text(ti, "=%d", value);
5470 } else {
5471 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"
, 5471, "tty_opts[idx].hfindex"))));
5472 int hfindex = *tty_opts[idx].hfindex;
5473 switch (proto_registrar_get_ftype(hfindex)) {
5474 case FT_BOOLEAN:
5475 proto_tree_add_item_ret_boolean(subtree, hfindex, tvb, offset + 3, 1, ENC_NA0x00000000, &boolval);
5476 proto_item_append_text(ti, "=%s", boolval ? "True" : "False");
5477 break;
5478 case FT_CHAR:
5479 proto_tree_add_item_ret_uint(subtree, hfindex, tvb, offset + 3, 1, ENC_NA0x00000000, &value);
5480 proto_item_append_text(ti, "='%s'", format_char(pinfo->pool, (char)value));
5481 break;
5482 case FT_UINT32:
5483 proto_tree_add_item_ret_uint(subtree, hfindex, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &value);
5484 proto_item_append_text(ti, "=%d", value);
5485 break;
5486 default:
5487 DISSECTOR_ASSERT_NOT_REACHED()(proto_report_dissector_bug("%s:%u: failed assertion \"DISSECTOR_ASSERT_NOT_REACHED\""
, "epan/dissectors/packet-ssh.c", 5487));
5488 }
5489 }
5490 offset += 4;
5491 }
5492 return offset;
5493}
5494
5495static int
5496ssh_dissect_connection_specific(tvbuff_t *packet_tvb, packet_info *pinfo,
5497 struct ssh_peer_data *peer_data, int offset, proto_tree *msg_type_tree,
5498 unsigned msg_code, ssh_message_info_t *message)
5499{
5500 uint32_t recipient_channel, sender_channel;
5501
5502 if (msg_code == SSH_MSG_CHANNEL_OPEN90) {
5503 uint32_t slen;
5504 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_type_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5505 offset += 4;
5506 proto_tree_add_item(msg_type_tree, hf_ssh_connection_type_name, packet_tvb, offset, slen, ENC_UTF_80x00000002);
5507 offset += slen;
5508 proto_tree_add_item(msg_type_tree, hf_ssh_connection_sender_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5509 offset += 4;
5510 proto_tree_add_item(msg_type_tree, hf_ssh_connection_initial_window, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5511 offset += 4;
5512 proto_tree_add_item(msg_type_tree, hf_ssh_connection_maximum_packet_size, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5513 offset += 4;
5514 } else if (msg_code == SSH_MSG_CHANNEL_OPEN_CONFIRMATION91) {
5515 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &recipient_channel);
5516 offset += 4;
5517 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_sender_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &sender_channel);
5518 offset += 4;
5519 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5520 create_channel(peer_data, recipient_channel, sender_channel);
5521 }
5522 proto_tree_add_item(msg_type_tree, hf_ssh_connection_initial_window, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5523 offset += 4;
5524 proto_tree_add_item(msg_type_tree, hf_ssh_connection_maximum_packet_size, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5525 offset += 4;
5526 } else if (msg_code == SSH_MSG_CHANNEL_WINDOW_ADJUST93) {
5527 proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5528 offset += 4;
5529 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
5530 offset += 4;
5531 } else if (msg_code == SSH_MSG_CHANNEL_DATA94) {
5532 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);
5533 offset += 4;
5534 // TODO: process according to the type of channel
5535 uint32_t slen;
5536 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_data_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5537 offset += 4;
5538 tvbuff_t* next_tvb = tvb_new_subset_length(packet_tvb, offset, slen);
5539
5540 ssh_channel_info_t* channel = get_channel_info_for_channel(peer_data, recipient_channel);
5541 if (channel) {
5542 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5543 message->byte_seq = channel->byte_seq;
5544 channel->byte_seq += slen;
5545 message->next_byte_seq = channel->byte_seq;
5546 }
5547 ssh_dissect_channel_data(next_tvb, pinfo, peer_data, msg_type_tree, message, channel);
5548 } else {
5549 expert_add_info_format(pinfo, ti, &ei_ssh_channel_number, "Could not find configuration for channel %d", recipient_channel);
5550 }
5551 offset += slen;
5552 } else if (msg_code == SSH_MSG_CHANNEL_EXTENDED_DATA95) {
5553 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);
5554 offset += 4;
5555 // TODO: process according to the type of channel
5556 proto_tree_add_item(msg_type_tree, hf_ssh_channel_data_type_code, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5557 offset += 4;
5558 uint32_t slen;
5559 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_data_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5560 offset += 4;
5561 tvbuff_t* next_tvb = tvb_new_subset_length(packet_tvb, offset, slen);
5562
5563 ssh_channel_info_t* channel = get_channel_info_for_channel(peer_data, recipient_channel);
5564 if (channel) {
5565 if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
5566 message->byte_seq = channel->byte_seq;
5567 channel->byte_seq += slen;
5568 message->next_byte_seq = channel->byte_seq;
5569 }
5570 ssh_dissect_channel_data(next_tvb, pinfo, peer_data, msg_type_tree, message, channel);
5571 } else {
5572 expert_add_info_format(pinfo, ti, &ei_ssh_channel_number, "Could not find configuration for channel %d", recipient_channel);
5573 }
5574 offset += slen;
5575 } else if (msg_code == SSH_MSG_CHANNEL_EOF96) {
5576 proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5577 offset += 4;
5578 } else if (msg_code == SSH_MSG_CHANNEL_CLOSE97) {
5579 proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5580 offset += 4;
5581 } else if (msg_code == SSH_MSG_CHANNEL_REQUEST98) {
5582 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &recipient_channel);
5583 offset += 4;
5584 const char* request_name;
5585 uint32_t slen;
5586 unsigned item_len;
5587 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_channel_request_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5588 offset += 4;
5589 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);
5590 offset += slen;
5591 proto_tree_add_item(msg_type_tree, hf_ssh_channel_request_want_reply, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5592 offset += 1;
5593 /* RFC 4254 6.5: "Only one of these requests ["shell", "exec",
5594 * or "subsystem"] can succeed per channel." Set up the
5595 * appropriate handler for future CHANNEL_DATA and
5596 * CHANNEL_EXTENDED_DATA messages on the channel.
5597 *
5598 * XXX - For "shell" and "exec", it might make more sense to send
5599 * CHANNEL_DATA to the "data-text-lines" dissector rather than "data".
5600 * Ideally if a pty has been setup there would be a way to interpret
5601 * the escape codes.
5602 */
5603 if (0 == strcmp(request_name, "subsystem")) {
5604 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_subsystem_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5605 offset += 4;
5606 const char* subsystem_name;
5607 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);
5608 set_subdissector_for_channel(peer_data, recipient_channel, subsystem_name);
5609 offset += slen;
5610 } else if (0 == strcmp(request_name, "env")) {
5611 /* The encoding for "env" variables and "exec" commands is not
5612 * specified in the SSH protocol, and must match whatever the
5613 * server expects. (Unlike CHANNEL_DATA, it is not affected by
5614 * whatever is in "env" or anything else in the protocol, and the
5615 * strings are passed to execve directly.) In practice the strings
5616 * must not have internal NULs (no UTF-16), and OpenSSH for Windows
5617 * and IBM z/OS force the use of UTF-8 and ISO-8859-1, respectively.
5618 *
5619 * These will probably be ASCII-compatible.
5620 */
5621 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);
5622 offset += item_len;
5623 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);
5624 offset += item_len;
5625 } else if (0 == strcmp(request_name, "exec")) {
5626 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);
5627 offset += item_len;
5628 set_subdissector_for_channel(peer_data, recipient_channel, "exec");
5629 } else if (0 == strcmp(request_name, "exit-status")) {
5630 proto_tree_add_item(msg_type_tree, hf_ssh_exit_status, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5631 offset += 4;
5632 } else if (0 == strcmp(request_name, "shell")) {
5633 set_subdissector_for_channel(peer_data, recipient_channel, "shell");
5634 } else if (0 == strcmp(request_name, "pty-req")) {
5635 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);
5636 offset += item_len;
5637 proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_width_char, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5638 offset += 4;
5639 proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_height_row, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5640 offset += 4;
5641 proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_width_pixel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5642 offset += 4;
5643 proto_tree_add_item(msg_type_tree, hf_ssh_pty_term_height_pixel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5644 offset += 4;
5645 proto_tree_add_item_ret_uint(msg_type_tree, hf_ssh_pty_term_modes_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5646 offset += 4;
5647 offset += ssh_dissect_term_modes(tvb_new_subset_length(packet_tvb, offset, slen), pinfo, msg_type_tree);
5648 }
5649 } else if (msg_code == SSH_MSG_CHANNEL_SUCCESS99) {
5650 proto_tree_add_item(msg_type_tree, hf_ssh_connection_recipient_channel, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5651 offset += 4;
5652 }
5653 return offset;
5654}
5655
5656/* Channel mapping {{{ */
5657
5658/* The usual flow:
5659 * 1. client sends SSH_MSG_CHANNEL_OPEN with its (sender) channel number
5660 * 2. server responds with SSH_MSG_CHANNEL_OPEN_CONFIRMATION with
5661 * its channel number and echoing the client's number, creating
5662 * a bijective map
5663 * 3. client sends SSH_MSG_CHANNEL_REQUEST which has the name of
5664 * the shell, command, or subsystem to start. This has the recipient's
5665 * channel number (i.e. the server's)
5666 * 4. server may send back a SSG_MSG_CHANNEL_SUCCESS (or _FAILURE) with
5667 * the the recipient (i.e., client) channel number, but this does not
5668 * contain the subsystem name or anything identifying the request to
5669 * which it responds. It MUST be sent in the same order as the
5670 * corresponding request message (RFC 4254 4 Global Requests), so we
5671 * could track it that way, but for our purposes we just treat all
5672 * requests as successes. (If not, either there won't be data or another
5673 * request will supercede it later.)
5674 *
5675 * Either side can open a channel (RFC 4254 5 Channel Mechanism). The
5676 * typical flow is the client opening a channel, but in the case of
5677 * remote port forwarding (7 TCP/IP Port Forwarding) the directions are
5678 * swapped. For port forwarding, all the information is contained in the
5679 * SSH_MSG_CHANNEL_OPEN, there is no SSH_MSG_CHANNEL_REQUEST.
5680*
5681 * XXX: Channel numbers can be re-used after being closed (5.3 Closing a
5682 * Channel), but not necessarily mapped to the same channel number on the
5683 * other side. If that actually happens, the right way to handle this is
5684 * to track the state changes over time for random packet access (e.g.,
5685 * using a multimap with the packet number instead of maps.)
5686 */
5687
5688static struct ssh_peer_data*
5689get_other_peer_data(struct ssh_peer_data *peer_data)
5690{
5691 bool_Bool is_server = &peer_data->global_data->peer_data[SERVER_PEER_DATA1]==peer_data;
5692 if (is_server) {
5693 return &peer_data->global_data->peer_data[CLIENT_PEER_DATA0];
5694 } else {
5695 return &peer_data->global_data->peer_data[SERVER_PEER_DATA1];
5696 }
5697}
5698
5699/* Create pairings between a recipient channel and the sender's channel,
5700 * from a SSH_MSG_CHANNEL_OPEN_CONFIRMATION. */
5701static void
5702create_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, uint32_t sender_channel)
5703{
5704 if (peer_data->channel_info == NULL((void*)0)) {
5705 peer_data->channel_info = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5706 }
5707 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)));
5708
5709 if (peer_data->channel_handles == NULL((void*)0)) {
5710 peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5711 }
5712
5713 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)));
5714 new_channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5715 wmem_map_insert(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), new_channel);
5716
5717 /* If the recipient channel is already configured in the other direction,
5718 * set the handle. We need this if we eventually handle port forwarding,
5719 * where all the information to handle the traffic is sent in the
5720 * SSH_MSG_CHANNEL_OPEN message before the CONFIRMATION. It might also
5721 * help if the packets are out of order (i.e. we get the client
5722 * CHANNEL_REQUEST before the CHANNEL_OPEN_CONFIRMATION.)
5723 */
5724 struct ssh_peer_data *other_peer_data = get_other_peer_data(peer_data);
5725 if (other_peer_data->channel_handles) {
5726 ssh_channel_info_t *peer_channel = wmem_map_lookup(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)));
5727 if (peer_channel) {
5728 new_channel->handle = peer_channel->handle;
5729 }
5730 }
5731}
5732
5733static ssh_channel_info_t*
5734get_channel_info_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel)
5735{
5736 if (peer_data->channel_handles == NULL((void*)0)) {
5737 return NULL((void*)0);
5738 }
5739 ssh_channel_info_t *channel = wmem_map_lookup(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)));
5740
5741 return channel;
5742}
5743
5744static void
5745set_subdissector_for_channel(struct ssh_peer_data *peer_data, uint32_t recipient_channel, const char* subsystem_name)
5746{
5747 dissector_handle_t handle = NULL((void*)0);
5748 if (0 == strcmp(subsystem_name, "sftp")) {
5749 handle = sftp_handle;
5750 } else if (0 == strcmp(subsystem_name, "shell") ||
5751 0 == strcmp(subsystem_name, "exec")) {
5752 handle = data_text_lines_handle;
5753 }
5754
5755 if (handle) {
5756 /* Map this handle to the recipient channel */
5757 ssh_channel_info_t *channel = NULL((void*)0);
5758 if (peer_data->channel_handles == NULL((void*)0)) {
5759 peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5760 } else {
5761 channel = wmem_map_lookup(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)));
5762 }
5763 if (channel == NULL((void*)0)) {
5764 channel = wmem_new0(wmem_file_scope(), ssh_channel_info_t)((ssh_channel_info_t*)wmem_alloc0((wmem_file_scope()), sizeof
(ssh_channel_info_t)));
5765 channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5766 wmem_map_insert(peer_data->channel_handles, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), channel);
5767 }
5768 channel->handle = handle;
5769
5770 /* This recipient channel is the sender channel for the other side.
5771 * Do we know what the recipient channel on the other side is? */
5772 struct ssh_peer_data *other_peer_data = get_other_peer_data(peer_data);
5773
5774 wmem_map_t *channel_info = other_peer_data->channel_info;
5775 if (channel_info) {
5776 void *sender_channel_p;
5777 if (wmem_map_lookup_extended(channel_info, GUINT_TO_POINTER(recipient_channel)((gpointer) (gulong) (recipient_channel)), NULL((void*)0), &sender_channel_p)) {
5778 uint32_t sender_channel = GPOINTER_TO_UINT(sender_channel_p)((guint) (gulong) (sender_channel_p));
5779 /* Yes. See the handle for the other side too. */
5780 if (other_peer_data->channel_handles == NULL((void*)0)) {
5781 other_peer_data->channel_handles = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
5782 channel = NULL((void*)0);
5783 } else {
5784 channel = wmem_map_lookup(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)));
5785 }
5786 if (channel == NULL((void*)0)) {
5787 channel = wmem_new0(wmem_file_scope(), ssh_channel_info_t)((ssh_channel_info_t*)wmem_alloc0((wmem_file_scope()), sizeof
(ssh_channel_info_t)));
5788 channel->multisegment_pdus = wmem_tree_new(wmem_file_scope());
5789 wmem_map_insert(other_peer_data->channel_handles, GUINT_TO_POINTER(sender_channel)((gpointer) (gulong) (sender_channel)), channel);
5790 }
5791 channel->handle = handle;
5792 }
5793 }
5794 }
5795}
5796
5797/* Channel mapping. }}} */
5798
5799static int
5800ssh_dissect_connection_generic(tvbuff_t *packet_tvb, packet_info *pinfo,
5801 int offset, proto_item *msg_type_tree, unsigned msg_code)
5802{
5803 (void)pinfo;
5804 if(msg_code==SSH_MSG_GLOBAL_REQUEST80){
5805 const char* request_name;
5806 unsigned slen;
5807 slen = tvb_get_ntohl(packet_tvb, offset) ;
5808 proto_tree_add_item(msg_type_tree, hf_ssh_global_request_name_len, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5809 offset += 4;
5810 request_name = (char*)tvb_get_string_enc(pinfo->pool, packet_tvb, offset, slen, ENC_ASCII0x00000000|ENC_NA0x00000000);
5811 proto_tree_add_item(msg_type_tree, hf_ssh_global_request_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
5812 offset += slen;
5813 proto_tree_add_item(msg_type_tree, hf_ssh_global_request_want_reply, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5814 offset += 1;
5815 if (0 == strcmp(request_name, "[email protected]") ||
5816 0 == strcmp(request_name, "[email protected]")) {
5817 while (tvb_reported_length_remaining(packet_tvb, offset)) {
5818 offset += ssh_tree_add_hostkey(packet_tvb, pinfo, offset, msg_type_tree,
5819 "Server host key", ett_key_exchange_host_key, NULL((void*)0));
5820 }
5821 }
5822 }
5823 return offset;
5824}
5825
5826static int
5827ssh_dissect_local_extension(tvbuff_t *packet_tvb, packet_info *pinfo,
5828 int offset, struct ssh_peer_data *peer_data, proto_item *msg_type_tree, unsigned msg_code) {
5829 unsigned slen;
5830 if (peer_data->global_data->ext_ping_openssh_offered && msg_code >= SSH_MSG_PING192 && msg_code <= SSH_MSG_PONG193) {
5831 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)"));
5832 proto_tree_add_item(msg_type_tree, hf_ssh2_ext_ping_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5833 offset += 1;
5834 if (msg_code == SSH_MSG_PING192) {
5835 slen = tvb_get_ntohl(packet_tvb, offset) ;
5836 proto_tree_add_item(msg_type_tree, hf_ssh_ping_data_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5837 offset += 4;
5838 proto_tree_add_item(msg_type_tree, hf_ssh_ping_data, packet_tvb, offset, slen, ENC_NA0x00000000);
5839 offset += slen;
5840 } else if (msg_code == SSH_MSG_PONG193) {
5841 slen = tvb_get_ntohl(packet_tvb, offset) ;
5842 proto_tree_add_item(msg_type_tree, hf_ssh_pong_data_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5843 offset += 4;
5844 proto_tree_add_item(msg_type_tree, hf_ssh_pong_data, packet_tvb, offset, slen, ENC_NA0x00000000);
5845 offset += slen;
5846 }
5847 } else {
5848 col_append_sep_str(pinfo->cinfo, COL_INFO, NULL((void*)0), val_to_str(pinfo->pool, msg_code, ssh2_msg_vals, "Unknown (%u)"));
5849 proto_tree_add_item(msg_type_tree, hf_ssh2_msg_code, packet_tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
5850 offset += 1;
5851 }
5852 return offset;
5853}
5854
5855static int
5856ssh_dissect_public_key_blob(tvbuff_t *tvb, packet_info *pinfo, proto_item *tree)
5857{
5858 uint32_t slen;
5859 const char* key_type;
5860
5861 unsigned offset = 0;
5862 proto_tree *blob_tree = NULL((void*)0);
5863 proto_item *blob_item = NULL((void*)0);
5864
5865 blob_item = proto_tree_add_item(tree, hf_ssh_blob, tvb, offset, tvb_reported_length(tvb), ENC_NA0x00000000);
5866 blob_tree = proto_item_add_subtree(blob_item, ett_userauth_pk_blob);
5867 proto_tree_add_item_ret_uint(blob_tree, hf_ssh_pk_blob_name_length, tvb, offset, 4, ENC_BIG_ENDIAN0x00000000, &slen);
5868 offset += 4;
5869 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);
5870 proto_item_append_text(blob_item, " (type: %s)", key_type);
5871 offset += slen;
5872
5873 if (0 == strcmp(key_type, "ssh-rsa")) {
5874 offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_e);
5875 offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_n);
5876 } else if (0 == strcmp(key_type, "ssh-dss")) {
5877 offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_p);
5878 offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_q);
5879 offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_g);
5880 offset += ssh_tree_add_mpint(tvb, offset, blob_tree, hf_ssh_blob_dsa_y);
5881 } 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-"
) )) {
5882 offset += ssh_tree_add_string(tvb, offset, blob_tree,
5883 hf_ssh_blob_ecdsa_curve_id, hf_ssh_blob_ecdsa_curve_id_length);
5884 offset += ssh_tree_add_string(tvb, offset, blob_tree,
5885 hf_ssh_blob_ecdsa_q, hf_ssh_blob_ecdsa_q_length);
5886 } 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") )) {
5887 offset += ssh_tree_add_string(tvb, offset, blob_tree,
5888 hf_ssh_blob_eddsa_key, hf_ssh_blob_eddsa_key_length);
5889 } else {
5890 proto_tree_add_item(blob_tree, hf_ssh_blob_data, tvb, offset, tvb_reported_length_remaining(tvb, offset), ENC_NA0x00000000);
5891 offset += tvb_reported_length_remaining(tvb, offset);
5892 }
5893
5894 return offset;
5895}
5896
5897static int
5898ssh_dissect_public_key_signature(tvbuff_t *packet_tvb, packet_info *pinfo,
5899 int offset, proto_item *msg_type_tree)
5900{
5901 (void)pinfo;
5902 unsigned slen;
5903 slen = tvb_get_ntohl(packet_tvb, offset) ;
5904 proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_blob_name_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5905 offset += 4;
5906 proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_blob_name, packet_tvb, offset, slen, ENC_ASCII0x00000000);
5907 offset += slen;
5908 slen = tvb_get_ntohl(packet_tvb, offset) ;
5909 proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_s_length, packet_tvb, offset, 4, ENC_BIG_ENDIAN0x00000000);
5910 offset += 4;
5911 proto_tree_add_item(msg_type_tree, hf_ssh_pk_sig_s, packet_tvb, offset, slen, ENC_NA0x00000000);
5912 offset += slen;
5913 return offset;
5914}
5915
5916#ifdef SSH_DECRYPT_DEBUG /* {{{ */
5917
5918static FILE* ssh_debug_file;
5919
5920static void
5921ssh_prefs_apply_cb(void)
5922{
5923 ssh_set_debug(ssh_debug_file_name);
5924}
5925
5926static void
5927ssh_set_debug(const char* name)
5928{
5929 static int debug_file_must_be_closed;
5930 int use_stderr;
5931
5932 use_stderr = name?(strcmp(name, SSH_DEBUG_USE_STDERR"-") == 0):0;
5933
5934 if (debug_file_must_be_closed)
5935 fclose(ssh_debug_file);
5936
5937 if (use_stderr)
5938 ssh_debug_file = stderrstderr;
5939 else if (!name || (strcmp(name, "") ==0))
5940 ssh_debug_file = NULL((void*)0);
5941 else
5942 ssh_debug_file = ws_fopenfopen(name, "w");
5943
5944 if (!use_stderr && ssh_debug_file)
5945 debug_file_must_be_closed = 1;
5946 else
5947 debug_file_must_be_closed = 0;
5948
5949 ssh_debug_printf("Wireshark SSH debug log \n\n");
5950#ifdef HAVE_LIBGNUTLS1
5951 ssh_debug_printf("GnuTLS version: %s\n", gnutls_check_version(NULL((void*)0)));
5952#endif
5953 ssh_debug_printf("Libgcrypt version: %s\n", gcry_check_version(NULL((void*)0)));
5954 ssh_debug_printf("\n");
5955}
5956
5957static void
5958ssh_debug_flush(void)
5959{
5960 if (ssh_debug_file)
5961 fflush(ssh_debug_file);
5962}
5963
5964static void
5965ssh_debug_printf(const char* fmt, ...)
5966{
5967 va_list ap;
5968
5969 if (!ssh_debug_file)
5970 return;
5971
5972 va_start(ap, fmt)__builtin_va_start(ap, fmt);
5973 vfprintf(ssh_debug_file, fmt, ap);
5974 va_end(ap)__builtin_va_end(ap);
5975}
5976
5977static void
5978ssh_print_data(const char* name, const unsigned char* data, size_t len)
5979{
5980 size_t i, j, k;
5981 if (!ssh_debug_file)
5982 return;
5983#ifdef OPENSSH_STYLE
5984 fprintf(ssh_debug_file,"%s[%d]\n",name, (int) len);
5985#else
5986 fprintf(ssh_debug_file,"%s[%d]:\n",name, (int) len);
5987#endif
5988 for (i=0; i<len; i+=16) {
5989#ifdef OPENSSH_STYLE
5990 fprintf(ssh_debug_file,"%04u: ", (unsigned int)i);
5991#else
5992 fprintf(ssh_debug_file,"| ");
5993#endif
5994 for (j=i, k=0; k<16 && j<len; ++j, ++k)
5995 fprintf(ssh_debug_file,"%.2x ",data[j]);
5996 for (; k<16; ++k)
5997 fprintf(ssh_debug_file," ");
5998#ifdef OPENSSH_STYLE
5999 fputc(' ', ssh_debug_file);
6000#else
6001 fputc('|', ssh_debug_file);
6002#endif
6003 for (j=i, k=0; k<16 && j<len; ++j, ++k) {
6004 unsigned char c = data[j];
6005 if (!g_ascii_isprint(c)((g_ascii_table[(guchar) (c)] & G_ASCII_PRINT) != 0) || (c=='\t')) c = '.';
6006 fputc(c, ssh_debug_file);
6007 }
6008#ifdef OPENSSH_STYLE
6009 fprintf(ssh_debug_file,"\n");
6010#else
6011 for (; k<16; ++k)
6012 fputc(' ', ssh_debug_file);
6013 fprintf(ssh_debug_file,"|\n");
6014#endif
6015 }
6016}
6017
6018#endif /* SSH_DECRYPT_DEBUG }}} */
6019
6020static void
6021ssh_secrets_block_callback(const void *secrets, unsigned size)
6022{
6023 ssh_keylog_process_lines((const uint8_t *)secrets, size);
6024}
6025
6026/* Functions for SSH random hashtables. {{{ */
6027static int
6028ssh_equal (const void *v, const void *v2)
6029{
6030 if (v == NULL((void*)0) || v2 == NULL((void*)0)) {
6031 return 0;
6032 }
6033
6034 const ssh_bignum *val1;
6035 const ssh_bignum *val2;
6036 val1 = (const ssh_bignum *)v;
6037 val2 = (const ssh_bignum *)v2;
6038
6039 if (val1->length == val2->length &&
6040 !memcmp(val1->data, val2->data, val2->length)) {
6041 return 1;
6042 }
6043 return 0;
6044}
6045
6046static unsigned
6047ssh_hash (const void *v)
6048{
6049 unsigned l,hash;
6050 const ssh_bignum* id;
6051 const unsigned* cur;
6052
6053 if (v == NULL((void*)0)) {
6054 return 0;
6055 }
6056
6057 hash = 0;
6058 id = (const ssh_bignum*) v;
6059
6060 /* id and id->data are mallocated in ssh_save_master_key(). As such 'data'
6061 * should be aligned for any kind of access (for example as a unsigned as
6062 * is done below). The intermediate void* cast is to prevent "cast
6063 * increases required alignment of target type" warnings on CPUs (such
6064 * as SPARCs) that do not allow misaligned memory accesses.
6065 */
6066 cur = (const unsigned*)(void*) id->data;
6067
6068 for (l=4; (l < id->length); l+=4, cur++)
6069 hash = hash ^ (*cur);
6070
6071 return hash;
6072}
6073
6074static void
6075ssh_free_glib_allocated_bignum(void *data)
6076{
6077 ssh_bignum * bignum;
6078 if (data == NULL((void*)0)) {
6079 return;
6080 }
6081
6082 bignum = (ssh_bignum *) data;
6083 g_free(bignum->data)(__builtin_object_size ((bignum->data), 0) != ((size_t) - 1
)) ? g_free_sized (bignum->data, __builtin_object_size ((bignum
->data), 0)) : (g_free) (bignum->data);
6084 g_free(bignum)(__builtin_object_size ((bignum), 0) != ((size_t) - 1)) ? g_free_sized
(bignum, __builtin_object_size ((bignum), 0)) : (g_free) (bignum
);
6085}
6086
6087static void
6088ssh_free_glib_allocated_entry(void *data)
6089{
6090 ssh_key_map_entry_t * entry;
6091 if (data == NULL((void*)0)) {
6092 return;
6093 }
6094
6095 entry = (ssh_key_map_entry_t *) data;
6096 g_free(entry->type)(__builtin_object_size ((entry->type), 0) != ((size_t) - 1
)) ? g_free_sized (entry->type, __builtin_object_size ((entry
->type), 0)) : (g_free) (entry->type);
6097 ssh_free_glib_allocated_bignum(entry->key_material);
6098 g_free(entry)(__builtin_object_size ((entry), 0) != ((size_t) - 1)) ? g_free_sized
(entry, __builtin_object_size ((entry), 0)) : (g_free) (entry
);
6099}
6100/* Functions for SSH random hashtables. }}} */
6101
6102static void
6103ssh_shutdown(void) {
6104 g_hash_table_destroy(ssh_master_key_map);
6105}
6106
6107void
6108proto_register_ssh(void)
6109{
6110 static hf_register_info hf[] = {
6111 { &hf_ssh_protocol,
6112 { "Protocol", "ssh.protocol",
6113 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6114 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6115
6116 { &hf_ssh_packet_length,
6117 { "Packet Length", "ssh.packet_length",
6118 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6119 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6120
6121 { &hf_ssh_packet_length_encrypted,
6122 { "Packet Length (encrypted)", "ssh.packet_length_encrypted",
6123 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6124 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6125
6126 { &hf_ssh_padding_length,
6127 { "Padding Length", "ssh.padding_length",
6128 FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6129 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6130
6131 { &hf_ssh_payload,
6132 { "Payload", "ssh.payload",
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_encrypted_packet,
6137 { "Encrypted Packet", "ssh.encrypted_packet",
6138 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6139 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6140
6141 { &hf_ssh_padding_string,
6142 { "Padding String", "ssh.padding_string",
6143 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6144 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6145
6146 { &hf_ssh_seq_num,
6147 { "Sequence number", "ssh.seq_num",
6148 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6149 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6150
6151 { &hf_ssh_mac_string,
6152 { "MAC", "ssh.mac",
6153 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6154 "Message authentication code", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6155
6156 { &hf_ssh_mac_status,
6157 { "MAC Status", "ssh.mac.status", FT_UINT8, BASE_NONE, VALS(proto_checksum_vals)((0 ? (const struct _value_string*)0 : ((proto_checksum_vals)
))), 0x0,
6158 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6159
6160 { &hf_ssh_direction,
6161 { "Direction", "ssh.direction",
6162 FT_BOOLEAN, BASE_NONE, TFS(&tfs_s2c_c2s)((0 ? (const struct true_false_string*)0 : ((&tfs_s2c_c2s
)))), 0x0,
6163 "Message direction", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6164
6165 { &hf_ssh_msg_code,
6166 { "Message Code", "ssh.message_code",
6167 FT_UINT8, BASE_DEC, VALS(ssh1_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh1_msg_vals)))), 0x0,
6168 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6169
6170 { &hf_ssh2_msg_code,
6171 { "Message Code", "ssh.message_code",
6172 FT_UINT8, BASE_DEC, VALS(ssh2_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_msg_vals)))), 0x0,
6173 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6174
6175 { &hf_ssh2_kex_dh_msg_code,
6176 { "Message Code", "ssh.message_code",
6177 FT_UINT8, BASE_DEC, VALS(ssh2_kex_dh_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_dh_msg_vals
)))), 0x0,
6178 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6179
6180 { &hf_ssh2_kex_dh_gex_msg_code,
6181 { "Message Code", "ssh.message_code",
6182 FT_UINT8, BASE_DEC, VALS(ssh2_kex_dh_gex_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_dh_gex_msg_vals
)))), 0x0,
6183 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6184
6185 { &hf_ssh2_kex_ecdh_msg_code,
6186 { "Message Code", "ssh.message_code",
6187 FT_UINT8, BASE_DEC, VALS(ssh2_kex_ecdh_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_ecdh_msg_vals
)))), 0x0,
6188 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6189
6190 { &hf_ssh2_kex_hybrid_msg_code,
6191 { "Message Code", "ssh.message_code",
6192 FT_UINT8, BASE_DEC, VALS(ssh2_kex_hybrid_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_kex_hybrid_msg_vals
)))), 0x0,
6193 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6194
6195 { &hf_ssh2_ext_ping_msg_code,
6196 { "Message Code", "ssh.message_code",
6197 FT_UINT8, BASE_DEC, VALS(ssh2_ext_ping_msg_vals)((0 ? (const struct _value_string*)0 : ((ssh2_ext_ping_msg_vals
)))), 0x0,
6198 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6199
6200 { &hf_ssh_cookie,
6201 { "Cookie", "ssh.cookie",
6202 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6203 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6204
6205 { &hf_ssh_kex_algorithms,
6206 { "kex_algorithms string", "ssh.kex_algorithms",
6207 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6208 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6209
6210 { &hf_ssh_server_host_key_algorithms,
6211 { "server_host_key_algorithms string", "ssh.server_host_key_algorithms",
6212 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6213 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6214
6215 { &hf_ssh_encryption_algorithms_client_to_server,
6216 { "encryption_algorithms_client_to_server string", "ssh.encryption_algorithms_client_to_server",
6217 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6218 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6219
6220 { &hf_ssh_encryption_algorithms_server_to_client,
6221 { "encryption_algorithms_server_to_client string", "ssh.encryption_algorithms_server_to_client",
6222 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6223 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6224
6225 { &hf_ssh_mac_algorithms_client_to_server,
6226 { "mac_algorithms_client_to_server string", "ssh.mac_algorithms_client_to_server",
6227 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6228 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6229
6230 { &hf_ssh_mac_algorithms_server_to_client,
6231 { "mac_algorithms_server_to_client string", "ssh.mac_algorithms_server_to_client",
6232 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6233 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6234
6235 { &hf_ssh_compression_algorithms_client_to_server,
6236 { "compression_algorithms_client_to_server string", "ssh.compression_algorithms_client_to_server",
6237 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6238 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6239
6240 { &hf_ssh_compression_algorithms_server_to_client,
6241 { "compression_algorithms_server_to_client string", "ssh.compression_algorithms_server_to_client",
6242 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6243 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6244
6245 { &hf_ssh_languages_client_to_server,
6246 { "languages_client_to_server string", "ssh.languages_client_to_server",
6247 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6248 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6249
6250 { &hf_ssh_languages_server_to_client,
6251 { "languages_server_to_client string", "ssh.languages_server_to_client",
6252 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6253 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6254
6255 { &hf_ssh_kex_algorithms_length,
6256 { "kex_algorithms length", "ssh.kex_algorithms_length",
6257 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6258 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6259
6260 { &hf_ssh_server_host_key_algorithms_length,
6261 { "server_host_key_algorithms length", "ssh.server_host_key_algorithms_length",
6262 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6263 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6264
6265 { &hf_ssh_encryption_algorithms_client_to_server_length,
6266 { "encryption_algorithms_client_to_server length", "ssh.encryption_algorithms_client_to_server_length",
6267 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6268 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6269
6270 { &hf_ssh_encryption_algorithms_server_to_client_length,
6271 { "encryption_algorithms_server_to_client length", "ssh.encryption_algorithms_server_to_client_length",
6272 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6273 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6274
6275 { &hf_ssh_mac_algorithms_client_to_server_length,
6276 { "mac_algorithms_client_to_server length", "ssh.mac_algorithms_client_to_server_length",
6277 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6278 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6279
6280 { &hf_ssh_mac_algorithms_server_to_client_length,
6281 { "mac_algorithms_server_to_client length", "ssh.mac_algorithms_server_to_client_length",
6282 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6283 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6284
6285 { &hf_ssh_compression_algorithms_client_to_server_length,
6286 { "compression_algorithms_client_to_server length", "ssh.compression_algorithms_client_to_server_length",
6287 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6288 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6289
6290 { &hf_ssh_compression_algorithms_server_to_client_length,
6291 { "compression_algorithms_server_to_client length", "ssh.compression_algorithms_server_to_client_length",
6292 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6293 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6294
6295 { &hf_ssh_languages_client_to_server_length,
6296 { "languages_client_to_server length", "ssh.languages_client_to_server_length",
6297 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6298 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6299
6300 { &hf_ssh_languages_server_to_client_length,
6301 { "languages_server_to_client length", "ssh.languages_server_to_client_length",
6302 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6303 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6304
6305 { &hf_ssh_first_kex_packet_follows,
6306 { "First KEX Packet Follows", "ssh.first_kex_packet_follows",
6307 FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6308 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6309
6310 { &hf_ssh_kex_reserved,
6311 { "Reserved", "ssh.kex.reserved",
6312 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6313 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6314
6315 { &hf_ssh_kex_hassh_algo,
6316 { "hasshAlgorithms", "ssh.kex.hassh_algorithms",
6317 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6318 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6319
6320 { &hf_ssh_kex_hassh,
6321 { "hassh", "ssh.kex.hassh",
6322 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6323 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6324
6325 { &hf_ssh_kex_hasshserver_algo,
6326 { "hasshServerAlgorithms", "ssh.kex.hasshserver_algorithms",
6327 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6328 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6329
6330 { &hf_ssh_kex_hasshserver,
6331 { "hasshServer", "ssh.kex.hasshserver",
6332 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6333 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6334
6335 { &hf_ssh_hostkey_length,
6336 { "Host key length", "ssh.host_key.length",
6337 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6338 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6339
6340 { &hf_ssh_hostkey_type_length,
6341 { "Host key type length", "ssh.host_key.type_length",
6342 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6343 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6344
6345 { &hf_ssh_hostkey_type,
6346 { "Host key type", "ssh.host_key.type",
6347 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6348 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6349
6350 { &hf_ssh_hostkey_data,
6351 { "Host key data", "ssh.host_key.data",
6352 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6353 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6354
6355 { &hf_ssh_hostkey_rsa_n,
6356 { "RSA modulus (N)", "ssh.host_key.rsa.n",
6357 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6358 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6359
6360 { &hf_ssh_hostkey_rsa_e,
6361 { "RSA public exponent (e)", "ssh.host_key.rsa.e",
6362 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6363 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6364
6365 { &hf_ssh_hostkey_dsa_p,
6366 { "DSA prime modulus (p)", "ssh.host_key.dsa.p",
6367 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6368 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6369
6370 { &hf_ssh_hostkey_dsa_q,
6371 { "DSA prime divisor (q)", "ssh.host_key.dsa.q",
6372 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6373 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6374
6375 { &hf_ssh_hostkey_dsa_g,
6376 { "DSA subgroup generator (g)", "ssh.host_key.dsa.g",
6377 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6378 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6379
6380 { &hf_ssh_hostkey_dsa_y,
6381 { "DSA public key (y)", "ssh.host_key.dsa.y",
6382 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6383 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6384
6385 { &hf_ssh_hostkey_ecdsa_curve_id,
6386 { "ECDSA elliptic curve identifier", "ssh.host_key.ecdsa.id",
6387 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6388 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6389
6390 { &hf_ssh_hostkey_ecdsa_curve_id_length,
6391 { "ECDSA elliptic curve identifier length", "ssh.host_key.ecdsa.id_length",
6392 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6393 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6394
6395 { &hf_ssh_hostkey_ecdsa_q,
6396 { "ECDSA public key (Q)", "ssh.host_key.ecdsa.q",
6397 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6398 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6399
6400 { &hf_ssh_hostkey_ecdsa_q_length,
6401 { "ECDSA public key length", "ssh.host_key.ecdsa.q_length",
6402 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6403 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6404
6405 { &hf_ssh_hostkey_eddsa_key,
6406 { "EdDSA public key", "ssh.host_key.eddsa.key",
6407 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6408 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6409
6410 { &hf_ssh_hostkey_eddsa_key_length,
6411 { "EdDSA public key length", "ssh.host_key.eddsa.key_length",
6412 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6413 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6414
6415 { &hf_ssh_hostsig_length,
6416 { "Host signature length", "ssh.host_sig.length",
6417 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6418 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6419
6420 { &hf_ssh_hostsig_type_length,
6421 { "Host signature type length", "ssh.host_sig.type_length",
6422 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6423 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6424
6425 { &hf_ssh_hostsig_type,
6426 { "Host signature type", "ssh.host_sig.type",
6427 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6428 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6429
6430 { &hf_ssh_hostsig_data_length,
6431 { "Host signature data length", "ssh.host_sig.data_length",
6432 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6433 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6434
6435 { &hf_ssh_hostsig_data,
6436 { "Host signature data", "ssh.host_sig.data",
6437 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6438 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6439
6440 { &hf_ssh_hostsig_rsa,
6441 { "RSA signature", "ssh.host_sig.rsa",
6442 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6443 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6444
6445 { &hf_ssh_hostsig_dsa,
6446 { "DSA signature", "ssh.host_sig.dsa",
6447 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6448 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6449
6450 { &hf_ssh_dh_e,
6451 { "DH client e", "ssh.dh.e",
6452 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6453 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6454
6455 { &hf_ssh_dh_f,
6456 { "DH server f", "ssh.dh.f",
6457 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6458 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6459
6460 { &hf_ssh_dh_gex_min,
6461 { "DH GEX Min", "ssh.dh_gex.min",
6462 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6463 "Minimal acceptable group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6464
6465 { &hf_ssh_dh_gex_nbits,
6466 { "DH GEX Number of Bits", "ssh.dh_gex.nbits",
6467 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6468 "Preferred group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6469
6470 { &hf_ssh_dh_gex_max,
6471 { "DH GEX Max", "ssh.dh_gex.max",
6472 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6473 "Maximal acceptable group size", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6474
6475 { &hf_ssh_dh_gex_p,
6476 { "DH GEX modulus (P)", "ssh.dh_gex.p",
6477 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6478 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6479
6480 { &hf_ssh_dh_gex_g,
6481 { "DH GEX base (G)", "ssh.dh_gex.g",
6482 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6483 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6484
6485 { &hf_ssh_ecdh_q_c,
6486 { "ECDH client's ephemeral public key (Q_C)", "ssh.ecdh.q_c",
6487 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6488 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6489
6490 { &hf_ssh_ecdh_q_c_length,
6491 { "ECDH client's ephemeral public key length", "ssh.ecdh.q_c_length",
6492 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6493 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6494
6495 { &hf_ssh_ecdh_q_s,
6496 { "ECDH server's ephemeral public key (Q_S)", "ssh.ecdh.q_s",
6497 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6498 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6499
6500 { &hf_ssh_ecdh_q_s_length,
6501 { "ECDH server's ephemeral public key length", "ssh.ecdh.q_s_length",
6502 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6503 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6504
6505 { &hf_ssh_mpint_length,
6506 { "Multi Precision Integer Length", "ssh.mpint_length",
6507 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6508 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6509
6510 { &hf_ssh_ignore_data_length,
6511 { "Debug message length", "ssh.ignore_data_length",
6512 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6513 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6514
6515 { &hf_ssh_ignore_data,
6516 { "Ignore data", "ssh.ignore_data",
6517 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6518 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6519
6520 { &hf_ssh_debug_always_display,
6521 { "Always Display", "ssh.debug_always_display",
6522 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6523 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6524
6525 { &hf_ssh_debug_message_length,
6526 { "Debug message length", "ssh.debug_name_length",
6527 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6528 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6529
6530 { &hf_ssh_debug_message,
6531 { "Debug message", "ssh.debug_name",
6532 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6533 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6534
6535 { &hf_ssh_service_name_length,
6536 { "Service Name length", "ssh.service_name_length",
6537 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6538 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6539
6540 { &hf_ssh_service_name,
6541 { "Service Name", "ssh.service_name",
6542 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6543 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6544
6545 { &hf_ssh_disconnect_reason,
6546 { "Disconnect reason", "ssh.disconnect_reason",
6547 FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
6548 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6549
6550 { &hf_ssh_disconnect_description_length,
6551 { "Disconnect description length", "ssh.disconnect_description_length",
6552 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6553 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6554
6555 { &hf_ssh_disconnect_description,
6556 { "Disconnect description", "ssh.disconnect_description",
6557 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6558 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6559
6560 { &hf_ssh_ext_count,
6561 { "Extension count", "ssh.extension.count",
6562 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6563 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6564
6565 { &hf_ssh_ext_name_length,
6566 { "Extension name length", "ssh.extension.name_length",
6567 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6568 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6569
6570 { &hf_ssh_ext_name,
6571 { "Extension name", "ssh.extension.name",
6572 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6573 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6574
6575 { &hf_ssh_ext_value_length,
6576 { "Extension value length", "ssh.extension.value_length",
6577 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6578 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6579
6580 { &hf_ssh_ext_value,
6581 { "Extension value", "ssh.extension.value",
6582 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6583 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6584
6585 { &hf_ssh_ext_server_sig_algs_algorithms,
6586 { "Accepted signature algorithms", "ssh.extension.server_sig_algs.algorithms",
6587 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6588 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6589
6590 { &hf_ssh_ext_delay_compression_algorithms_client_to_server_length,
6591 { "Compression algorithms (client to server) length", "ssh.extension.delay_compression.compression_algorithms_client_to_server_length",
6592 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6593 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6594
6595 { &hf_ssh_ext_delay_compression_algorithms_client_to_server,
6596 { "Compression algorithms (client to server)", "ssh.extension.delay_compression.compression_algorithms_client_to_server",
6597 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6598 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6599
6600 { &hf_ssh_ext_delay_compression_algorithms_server_to_client_length,
6601 { "Compression algorithms (server to client) length", "ssh.extension.delay_compression.compression_algorithms_server_to_client_length",
6602 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6603 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6604
6605 { &hf_ssh_ext_delay_compression_algorithms_server_to_client,
6606 { "Compression algorithms (server to client)", "ssh.extension.delay_compression.compression_algorithms_server_to_client",
6607 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6608 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6609
6610 { &hf_ssh_ext_no_flow_control_value,
6611 { "No flow control flag", "ssh.extension.no_flow_control.value",
6612 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6613 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6614
6615 { &hf_ssh_ext_elevation_value,
6616 { "Elevation flag", "ssh.extension.elevation.value",
6617 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6618 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6619
6620 { &hf_ssh_ext_prop_publickey_algorithms_algorithms,
6621 { "Public key algorithms", "ssh.extension.prop_publickey_algorithms.algorithms",
6622 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6623 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6624
6625 { &hf_ssh_lang_tag_length,
6626 { "Language tag length", "ssh.lang_tag_length",
6627 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6628 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6629
6630 { &hf_ssh_lang_tag,
6631 { "Language tag", "ssh.lang_tag",
6632 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6633 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6634
6635 { &hf_ssh_ping_data_length,
6636 { "Data length", "ssh.ping_data_length",
6637 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6638 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6639
6640 { &hf_ssh_ping_data,
6641 { "Data", "ssh.ping_data",
6642 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6643 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6644
6645 { &hf_ssh_pong_data_length,
6646 { "Data length", "ssh.pong_data_length",
6647 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6648 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6649
6650 { &hf_ssh_pong_data,
6651 { "Data", "ssh.pong_data",
6652 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6653 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6654
6655
6656 { &hf_ssh_userauth_user_name_length,
6657 { "User Name length", "ssh.userauth_user_name_length",
6658 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6659 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6660
6661 { &hf_ssh_userauth_user_name,
6662 { "User Name", "ssh.userauth_user_name",
6663 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6664 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6665
6666 { &hf_ssh_userauth_change_password,
6667 { "Change password", "ssh.userauth.change_password",
6668 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6669 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6670
6671 { &hf_ssh_userauth_service_name_length,
6672 { "Service Name length", "ssh.userauth_service_name_length",
6673 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6674 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6675
6676 { &hf_ssh_userauth_service_name,
6677 { "Service Name", "ssh.userauth_service_name",
6678 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6679 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6680
6681 { &hf_ssh_userauth_method_name_length,
6682 { "Method Name length", "ssh.userauth_method_name_length",
6683 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6684 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6685
6686 { &hf_ssh_userauth_method_name,
6687 { "Method Name", "ssh.userauth_method_name",
6688 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6689 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6690
6691 { &hf_ssh_userauth_have_signature,
6692 { "Have signature", "ssh.userauth.have_signature",
6693 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6694 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6695
6696 { &hf_ssh_userauth_password_length,
6697 { "Password length", "ssh.userauth_password_length",
6698 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6699 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6700
6701 { &hf_ssh_userauth_password,
6702 { "Password", "ssh.userauth_password",
6703 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6704 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6705
6706 { &hf_ssh_userauth_new_password_length,
6707 { "New password length", "ssh.userauth_new_password_length",
6708 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6709 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6710
6711 { &hf_ssh_userauth_new_password,
6712 { "New password", "ssh.userauth_new_password",
6713 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6714 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6715
6716 { &hf_ssh_auth_failure_list_length,
6717 { "Authentications that can continue list len", "ssh.auth_failure_cont_list_length",
6718 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6719 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6720
6721 { &hf_ssh_auth_failure_list,
6722 { "Authentications that can continue list", "ssh.auth_failure_cont_list",
6723 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6724 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6725
6726 { &hf_ssh_userauth_partial_success,
6727 { "Partial success", "ssh.userauth.partial_success",
6728 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
6729 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6730
6731 { &hf_ssh_userauth_pka_name_len,
6732 { "Public key algorithm name length", "ssh.userauth_pka_name_length",
6733 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6734 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6735
6736 { &hf_ssh_userauth_pka_name,
6737 { "Public key algorithm name", "ssh.userauth_pka_name",
6738 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6739 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6740
6741 { &hf_ssh_pk_blob_name_length,
6742 { "Public key blob algorithm name length", "ssh.pk_blob_name_length",
6743 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6744 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6745
6746 { &hf_ssh_pk_blob_name,
6747 { "Public key blob algorithm name", "ssh.pk_blob_name",
6748 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6749 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6750
6751 { &hf_ssh_blob_length,
6752 { "Public key blob length", "ssh.pk_blob_length",
6753 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6754 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6755
6756 { &hf_ssh_blob,
6757 { "Public key blob", "ssh.pk_blob",
6758 FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6759 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6760
6761 { &hf_ssh_blob_e,
6762 { "ssh-rsa public exponent (e)", "ssh.pk_blob.ssh-rsa.e",
6763 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6764 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6765
6766 { &hf_ssh_blob_n,
6767 { "ssh-rsa modulus (n)", "ssh.pk_blob.ssh-rsa.n",
6768 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6769 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6770
6771 { &hf_ssh_blob_dsa_p,
6772 { "DSA prime modulus (p)", "ssh.pk_blob.dsa.p",
6773 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6774 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6775
6776 { &hf_ssh_blob_dsa_q,
6777 { "DSA prime divisor (q)", "ssh.pk_blob.dsa.q",
6778 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6779 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6780
6781 { &hf_ssh_blob_dsa_g,
6782 { "DSA subgroup generator (g)", "ssh.pk_blob.dsa.g",
6783 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6784 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6785
6786 { &hf_ssh_blob_dsa_y,
6787 { "DSA public key (y)", "ssh.pk_blob.dsa.y",
6788 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6789 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6790
6791 { &hf_ssh_blob_ecdsa_curve_id,
6792 { "ECDSA elliptic curve identifier", "ssh.pk_blob.ecdsa.id",
6793 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6794 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6795
6796 { &hf_ssh_blob_ecdsa_curve_id_length,
6797 { "ECDSA elliptic curve identifier length", "ssh.pk_blob.ecdsa.id_length",
6798 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6799 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6800
6801 { &hf_ssh_blob_ecdsa_q,
6802 { "ECDSA public key (Q)", "ssh.pk_blob.ecdsa.q",
6803 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6804 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6805
6806 { &hf_ssh_blob_ecdsa_q_length,
6807 { "ECDSA public key length", "ssh.pk_blob.ecdsa.q_length",
6808 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6809 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6810
6811 { &hf_ssh_blob_eddsa_key,
6812 { "EdDSA public key", "ssh.pk_blob.eddsa.key",
6813 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6814 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6815
6816 { &hf_ssh_blob_eddsa_key_length,
6817 { "EdDSA public key length", "ssh.pk_blob.eddsa.key_length",
6818 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6819 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6820
6821 { &hf_ssh_blob_data,
6822 { "Public key blob data", "ssh.pk_blob.data",
6823 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6824 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6825
6826 { &hf_ssh_signature_length,
6827 { "Public key signature blob length", "ssh.pk_sig_blob_length",
6828 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6829 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6830
6831 { &hf_ssh_pk_sig_blob_name_length,
6832 { "Public key signature blob algorithm name length", "ssh.pk_sig_blob_name_length",
6833 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6834 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6835
6836 { &hf_ssh_pk_sig_blob_name,
6837 { "Public key signature blob algorithm name", "ssh.pk_sig_blob_name",
6838 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6839 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6840
6841 { &hf_ssh_pk_sig_s_length,
6842 { "ssh-rsa signature length", "ssh.sig.ssh-rsa.length",
6843 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6844 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6845
6846 { &hf_ssh_pk_sig_s,
6847 { "ssh-rsa signature (s)", "ssh.sig.ssh-rsa.s",
6848 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
6849 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6850
6851 { &hf_ssh_connection_type_name_len,
6852 { "Channel type name length", "ssh.connection_type_name_length",
6853 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6854 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6855
6856 { &hf_ssh_connection_type_name,
6857 { "Channel type name", "ssh.connection_type_name",
6858 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6859 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6860
6861 { &hf_ssh_connection_sender_channel,
6862 { "Sender channel", "ssh.connection_sender_channel",
6863 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6864 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6865
6866 { &hf_ssh_connection_recipient_channel,
6867 { "Recipient channel", "ssh.connection_recipient_channel",
6868 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6869 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6870
6871 { &hf_ssh_connection_initial_window,
6872 { "Initial window size", "ssh.connection_initial_window_size",
6873 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6874 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6875
6876 { &hf_ssh_connection_maximum_packet_size,
6877 { "Maximum packet size", "ssh.userauth_maximum_packet_size",
6878 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6879 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6880
6881 { &hf_ssh_global_request_name_len,
6882 { "Global request name length", "ssh.global_request_name_length",
6883 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6884 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6885
6886 { &hf_ssh_global_request_name,
6887 { "Global request name", "ssh.global_request_name",
6888 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6889 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6890
6891 { &hf_ssh_global_request_want_reply,
6892 { "Global request want reply", "ssh.global_request_want_reply",
6893 FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6894 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6895
6896 { &hf_ssh_global_request_hostkeys_array_len,
6897 { "Host keys array length", "ssh.global_request_hostkeys",
6898 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6899 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6900
6901 { &hf_ssh_channel_request_name_len,
6902 { "Channel request name length", "ssh.channel_request_name_length",
6903 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6904 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6905
6906 { &hf_ssh_channel_request_name,
6907 { "Channel request name", "ssh.channel_request_name",
6908 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6909 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6910
6911 { &hf_ssh_channel_request_want_reply,
6912 { "Channel request want reply", "ssh.channel_request_want_reply",
6913 FT_UINT8, BASE_DEC, NULL((void*)0), 0x0,
6914 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6915
6916 { &hf_ssh_subsystem_name_len,
6917 { "Subsystem name length", "ssh.subsystem_name_length",
6918 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6919 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6920
6921 { &hf_ssh_subsystem_name,
6922 { "Subsystem name", "ssh.subsystem_name",
6923 FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6924 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
6925
6926 { &hf_ssh_exec_cmd,
6927 { "Command", "ssh.exec_command",
6928 FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6929 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6930
6931 { &hf_ssh_env_name,
6932 { "Variable name", "ssh.env_name",
6933 FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6934 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6935
6936 { &hf_ssh_env_value,
6937 { "Variable value", "ssh.env_value",
6938 FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6939 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6940
6941 { &hf_ssh_pty_term,
6942 { "TERM environment variable", "ssh.pty_term",
6943 FT_UINT_STRING, BASE_NONE, NULL((void*)0), 0x0,
6944 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6945
6946 { &hf_ssh_pty_term_width_char,
6947 { "Terminal width, characters", "ssh.pty_term_width_char",
6948 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6949 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6950
6951 { &hf_ssh_pty_term_height_row,
6952 { "Terminal height, rows", "ssh.pty_term_height_row",
6953 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6954 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6955
6956 { &hf_ssh_pty_term_width_pixel,
6957 { "Terminal width, pixels", "ssh.pty_term_width_pixel",
6958 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6959 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6960
6961 { &hf_ssh_pty_term_height_pixel,
6962 { "Terminal height, pixels", "ssh.pty_term_height_pixel",
6963 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6964 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6965
6966 { &hf_ssh_pty_term_modes_len,
6967 { "Encoded Terminal Modes Length", "ssh.pty_term_modes_length",
6968 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
6969 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6970
6971 { &hf_ssh_pty_term_modes,
6972 { "Encoded Terminal Modes", "ssh.pty_term_modes",
6973 FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6974 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6975
6976 { &hf_ssh_pty_term_mode,
6977 { "Mode", "ssh.pty_term_mode",
6978 FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
6979 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6980
6981 { &hf_ssh_pty_term_mode_opcode,
6982 { "Opcode", "ssh.pty_term_mode.opcode",
6983 FT_UINT8, BASE_DEC, VALS(ssh_tty_op_vals)((0 ? (const struct _value_string*)0 : ((ssh_tty_op_vals)))), 0x0,
6984 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6985
6986 { &hf_ssh_pty_term_mode_vintr,
6987 { "Interrupt character", "ssh.pty_term_mode.vintr",
6988 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6989 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
6990
6991 { &hf_ssh_pty_term_mode_vquit,
6992 { "Quit character", "ssh.pty_term_mode.vquit",
6993 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6994 "Sends SIGQUIT on POSIX systems", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
6995
6996 { &hf_ssh_pty_term_mode_verase,
6997 { "Erase the character to the left of the cursor", "ssh.pty_term_mode.verase",
6998 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
6999 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7000
7001 { &hf_ssh_pty_term_mode_vkill,
7002 { "Kill the current input line", "ssh.pty_term_mode.vkill",
7003 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7004 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7005
7006 { &hf_ssh_pty_term_mode_veof,
7007 { "End-of-file character", "ssh.pty_term_mode.veof",
7008 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7009 "Sends EOF from the terminal", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
7010
7011 { &hf_ssh_pty_term_mode_veol,
7012 { "End-of-line character", "ssh.pty_term_mode.veol",
7013 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7014 "In additional to carriage return and/or line feed", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7015
7016 { &hf_ssh_pty_term_mode_veol2,
7017 { "Additional end-of-line character", "ssh.pty_term_mode.veol2",
7018 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7019 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7020
7021 { &hf_ssh_pty_term_mode_vstart,
7022 { "Continues paused output", "ssh.pty_term_mode.vstart",
7023 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7024 "Normally Control-Q", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
7025
7026 { &hf_ssh_pty_term_mode_vstop,
7027 { "Pauses output", "ssh.pty_term_mode.vstop",
7028 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7029 "Normally Control-S", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7030
7031 { &hf_ssh_pty_term_mode_vsusp,
7032 { "Suspends the current program", "ssh.pty_term_mode.vsusp",
7033 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7034 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7035
7036 { &hf_ssh_pty_term_mode_vdsusp,
7037 { "Another suspend character", "ssh.pty_term_mode.vdsusp",
7038 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7039 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7040
7041 { &hf_ssh_pty_term_mode_vreprint,
7042 { "Reprints the current input line", "ssh.pty_term_mode.vreprint",
7043 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7044 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7045
7046 { &hf_ssh_pty_term_mode_vwerase,
7047 { "Erase a word to the left of the cursor", "ssh.pty_term_mode.vwerase",
7048 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7049 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7050
7051 { &hf_ssh_pty_term_mode_vlnext,
7052 { "Enter the next character typed literally", "ssh.pty_term_mode.vlnext",
7053 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7054 "Even if a special character", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7055
7056 { &hf_ssh_pty_term_mode_vflush,
7057 { "Character to flush output", "ssh.pty_term_mode.vflush",
7058 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7059 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7060
7061 { &hf_ssh_pty_term_mode_vswtch,
7062 { "Switch to a different shell layer", "ssh.pty_term_mode.vswtch",
7063 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7064 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7065
7066 { &hf_ssh_pty_term_mode_vstatus,
7067 { "Print system status line", "ssh.pty_term_mode.vstatus",
7068 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7069 "Load, command, pid, etc.", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)}},
7070
7071 { &hf_ssh_pty_term_mode_vdiscard,
7072 { "Toggles the flushing of terminal output", "ssh.pty_term_mode.vdiscard",
7073 FT_CHAR, BASE_HEX, NULL((void*)0), 0x0,
7074 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
7075
7076 { &hf_ssh_pty_term_mode_ignpar,
7077 { "Ignore parity flag", "ssh.pty_term_mode.ignpar",
7078 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7079 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7080
7081 { &hf_ssh_pty_term_mode_parmrk,
7082 { "Mark parity and framing errors", "ssh.pty_term_mode.parmrk",
7083 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7084 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7085
7086 { &hf_ssh_pty_term_mode_inpck,
7087 { "Enable checking of parity errors", "ssh.pty_term_mode.inpck",
7088 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7089 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7090
7091 { &hf_ssh_pty_term_mode_istrip,
7092 { "Strip 8th bit off characters", "ssh.pty_term_mode.istrip",
7093 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7094 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7095
7096 { &hf_ssh_pty_term_mode_inlcr,
7097 { "Map NL into CR on input", "ssh.pty_term_mode.inlcr",
7098 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7099 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7100
7101 { &hf_ssh_pty_term_mode_igncr,
7102 { "Ignore CR on input", "ssh.pty_term_mode.igncr",
7103 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7104 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7105
7106 { &hf_ssh_pty_term_mode_icrnl,
7107 { "Map CR to NL on input", "ssh.pty_term_mode.icrnl",
7108 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7109 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7110
7111 { &hf_ssh_pty_term_mode_iuclc,
7112 { "Translate uppercase characters to lowercase", "ssh.pty_term_mode.iuclc",
7113 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7114 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7115
7116 { &hf_ssh_pty_term_mode_ixon,
7117 { "Enable output flow control", "ssh.pty_term_mode.ixon",
7118 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7119 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7120
7121 { &hf_ssh_pty_term_mode_ixany,
7122 { "Any char will restart after stop", "ssh.pty_term_mode.ixany",
7123 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7124 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7125
7126 { &hf_ssh_pty_term_mode_ixoff,
7127 { "Enable input flow control", "ssh.pty_term_mode.ixoff",
7128 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7129 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7130
7131 { &hf_ssh_pty_term_mode_imaxbel,
7132 { "Ring bell on input queue full", "ssh.pty_term_mode.imaxbel",
7133 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7134 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7135
7136 { &hf_ssh_pty_term_mode_iutf8,
7137 { "Terminal input and output is assumed to be encoded in UTF-8", "ssh.pty_term_mode.iutf8",
7138 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7139 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7140
7141 { &hf_ssh_pty_term_mode_isig,
7142 { "Enable signals INTR, QUIT, [D]SUSP", "ssh.pty_term_mode.isig",
7143 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7144 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7145
7146 { &hf_ssh_pty_term_mode_icanon,
7147 { "Canonicalize input lines", "ssh.pty_term_mode.icanon",
7148 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7149 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7150
7151 { &hf_ssh_pty_term_mode_xcase,
7152 { "Enable input and output of uppercase characters by preceding their lowercase equivalents with '\'", "ssh.pty_term_mode.xcase",
7153 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7154 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7155
7156 { &hf_ssh_pty_term_mode_echo,
7157 { "Enable echoing", "ssh.pty_term_mode.echo",
7158 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7159 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7160
7161 { &hf_ssh_pty_term_mode_echoe,
7162 { "Visually erase chars", "ssh.pty_term_mode.echoe",
7163 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7164 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7165
7166 { &hf_ssh_pty_term_mode_echok,
7167 { "Kill character discards current line", "ssh.pty_term_mode.echok",
7168 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7169 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7170
7171 { &hf_ssh_pty_term_mode_echonl,
7172 { "Echo NL even if ECHO is off", "ssh.pty_term_mode.echonl",
7173 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7174 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7175
7176 { &hf_ssh_pty_term_mode_noflsh,
7177 { "No flush after interrupt", "ssh.pty_term_mode.noflsh",
7178 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7179 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7180
7181 { &hf_ssh_pty_term_mode_tostop,
7182 { "Stop background jobs from output", "ssh.pty_term_mode.tostop",
7183 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7184 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7185
7186 { &hf_ssh_pty_term_mode_iexten,
7187 { "Enable extensions", "ssh.pty_term_mode.iexten",
7188 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7189 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7190
7191 { &hf_ssh_pty_term_mode_echoctl,
7192 { "Echo control characters as ^(Char)", "ssh.pty_term_mode.echoctl",
7193 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7194 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7195
7196 { &hf_ssh_pty_term_mode_echoke,
7197 { "Visual erase for line kill", "ssh.pty_term_mode.echoke",
7198 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7199 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7200
7201 { &hf_ssh_pty_term_mode_pendin,
7202 { "Retype pending input", "ssh.pty_term_mode.pendin",
7203 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7204 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7205
7206 { &hf_ssh_pty_term_mode_opost,
7207 { "Enable output processing", "ssh.pty_term_mode.opost",
7208 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7209 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7210
7211 { &hf_ssh_pty_term_mode_olcuc,
7212 { "Convert lowercase to uppercase", "ssh.pty_term_mode.olcuc",
7213 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7214 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7215
7216 { &hf_ssh_pty_term_mode_onlcr,
7217 { "Map NL to CR-NL", "ssh.pty_term_mode.onlcr",
7218 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7219 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7220
7221 { &hf_ssh_pty_term_mode_ocrnl,
7222 { "Translate carriage return to newline (output)", "ssh.pty_term_mode.ocrnl",
7223 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7224 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7225
7226 { &hf_ssh_pty_term_mode_onocr,
7227 { "Translate newline to carriage-return newline (output)", "ssh.pty_term_mode.onocr",
7228 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7229 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7230
7231 { &hf_ssh_pty_term_mode_onlret,
7232 { "Newline performs a carriage return (output)", "ssh.pty_term_mode.onlret",
7233 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7234 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7235
7236 { &hf_ssh_pty_term_mode_cs7,
7237 { "7 bit mode", "ssh.pty_term_mode.cs7",
7238 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7239 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7240
7241 { &hf_ssh_pty_term_mode_cs8,
7242 { "8 bit mode", "ssh.pty_term_mode.cs8",
7243 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7244 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7245
7246 { &hf_ssh_pty_term_mode_parenb,
7247 { "Parity enable", "ssh.pty_term_mode.parenb",
7248 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7249 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7250
7251 { &hf_ssh_pty_term_mode_parodd,
7252 { "Odd parity", "ssh.pty_term_mode.parodd",
7253 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7254 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7255
7256 { &hf_ssh_pty_term_mode_ispeed,
7257 { "Input baud rate", "ssh.pty_term_mode.ispeed",
7258 FT_UINT32, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_bit_sec)((0 ? (const struct unit_name_string*)0 : ((&units_bit_sec
)))), 0x0,
7259 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7260
7261 { &hf_ssh_pty_term_mode_ospeed,
7262 { "Output baud rate", "ssh.pty_term_mode.ospeed",
7263 FT_UINT32, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_bit_sec)((0 ? (const struct unit_name_string*)0 : ((&units_bit_sec
)))), 0x0,
7264 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7265
7266 { &hf_ssh_pty_term_mode_value,
7267 { "Value", "ssh.pty_term_mode.value",
7268 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7269 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7270
7271 { &hf_ssh_exit_status,
7272 { "Exit status", "ssh.exit_status",
7273 FT_UINT32, BASE_HEX, NULL((void*)0), 0x0,
7274 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7275
7276 { &hf_ssh_channel_window_adjust,
7277 { "Bytes to add", "ssh.channel_window_adjust",
7278 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7279 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7280
7281 { &hf_ssh_channel_data_len,
7282 { "Data length", "ssh.channel_data_length",
7283 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7284 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7285
7286 { &hf_ssh_channel_data_type_code,
7287 { "Data Type Code", "ssh.channel_data_type_code",
7288 FT_UINT32, BASE_DEC, VALS(ssh_channel_data_type_code_vals)((0 ? (const struct _value_string*)0 : ((ssh_channel_data_type_code_vals
)))), 0x0,
7289 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
7290
7291 { &hf_ssh_reassembled_in,
7292 { "Reassembled PDU in frame", "ssh.reassembled_in",
7293 FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7294 "The PDU that doesn't end in this segment is reassembled in this frame", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7295
7296 { &hf_ssh_reassembled_length,
7297 { "Reassembled PDU length", "ssh.reassembled.length",
7298 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7299 "The total length of the reassembled payload", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7300
7301 { &hf_ssh_reassembled_data,
7302 { "Reassembled PDU data", "ssh.reassembled.data",
7303 FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
7304 "The payload of multiple reassembled SSH segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7305
7306 { &hf_ssh_segments,
7307 { "Reassembled SSH segments", "ssh.segments",
7308 FT_NONE, BASE_NONE, NULL((void*)0), 0x0,
7309 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7310
7311 { &hf_ssh_segment,
7312 { "SSH segment", "ssh.segment",
7313 FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7314 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7315
7316 { &hf_ssh_segment_overlap,
7317 { "Segment overlap", "ssh.segment.overlap",
7318 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7319 "Segment overlaps with other segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7320
7321 { &hf_ssh_segment_overlap_conflict,
7322 { "Conflicting data in segment overlap", "ssh.segment.overlap.conflict",
7323 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7324 "Overlapping segments contained conflicting data", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7325
7326 { &hf_ssh_segment_multiple_tails,
7327 { "Multiple tail segments found", "ssh.segment.multipletails",
7328 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7329 "Several tails were found when reassembling the pdu", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7330
7331 { &hf_ssh_segment_too_long_fragment,
7332 { "Segment too long", "ssh.segment.toolongfragment",
7333 FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
7334 "Segment contained data past end of the pdu", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7335
7336 { &hf_ssh_segment_error,
7337 { "Reassembling error", "ssh.segment.error",
7338 FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x0,
7339 "Reassembling error due to illegal segments", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7340
7341 { &hf_ssh_segment_count,
7342 { "Segment count", "ssh.segment.count",
7343 FT_UINT32, BASE_DEC, NULL((void*)0), 0x0,
7344 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7345
7346 { &hf_ssh_segment_data,
7347 { "SSH segment data", "ssh.segment.data",
7348 FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
7349 "The payload of a single SSH segment", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
7350
7351 { &hf_ssh_hybrid_blob_client,
7352 { "Hybrid Key Exchange Blob Client", "ssh.kex_hybrid_blob_client",
7353 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, "Client post-quantum hybrid blob", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7354 },
7355
7356 { &hf_ssh_hybrid_blob_client_len,
7357 { "Hybrid Key Exchange Blob Client Length", "ssh.kex_hybrid_blob_client_len",
7358 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) }
7359 },
7360
7361 { &hf_ssh_hybrid_blob_server,
7362 { "Hybrid Key Exchange Blob Server", "ssh.kex_hybrid_blob_server",
7363 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, "Server post-quantum hybrid blob", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7364 },
7365
7366 { &hf_ssh_hybrid_blob_server_len,
7367 { "Hybrid Key Exchange Blob Server Length", "ssh.kex_hybrid_blob_server_len",
7368 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) }
7369 },
7370
7371 { &hf_ssh_pq_kem_client,
7372 { "Client PQ KEM Public Key", "ssh.kex.pq_kem_client",
7373 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
7374 "Post-quantum key (client)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7375 },
7376
7377 { &hf_ssh_pq_kem_server,
7378 { "Server PQ KEM Response", "ssh.kex.pq_kem_server",
7379 FT_BYTES, BASE_NONE, NULL((void*)0), 0x0,
7380 "Post-quantum ciphertext (server response)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
7381 },
7382
7383 };
7384
7385 static int *ett[] = {
7386 &ett_ssh,
7387 &ett_key_exchange,
7388 &ett_key_exchange_host_key,
7389 &ett_key_exchange_host_sig,
7390 &ett_extension,
7391 &ett_userauth_pk_blob,
7392 &ett_userauth_pk_signature,
7393 &ett_term_modes,
7394 &ett_term_mode,
7395 &ett_ssh1,
7396 &ett_ssh2,
7397 &ett_key_init,
7398 &ett_ssh_segments,
7399 &ett_ssh_pqhybrid_client, // added for PQ hybrid CLIENT dissection
7400 &ett_ssh_pqhybrid_server, // added for PQ hybrid SERVER dissection
7401 &ett_ssh_segment
7402 };
7403
7404 static ei_register_info ei[] = {
7405 { &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)}} }},
7406 { &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)}} }},
7407 { &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)}} }},
7408 { &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)}} }},
7409 { &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)}} }},
7410 { &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)}} }},
7411 { &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)}} }},
7412 { &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)}} }},
7413
7414 };
7415 module_t *ssh_module;
7416 expert_module_t *expert_ssh;
7417
7418 proto_ssh = proto_register_protocol("SSH Protocol", "SSH", "ssh");
7419 proto_register_field_array(proto_ssh, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));
7420 proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
7421 expert_ssh = expert_register_protocol(proto_ssh);
7422 expert_register_field_array(expert_ssh, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0]));
7423
7424#ifdef SSH_DECRYPT_DEBUG
7425 ssh_module = prefs_register_protocol(proto_ssh, ssh_prefs_apply_cb);
7426#else
7427 ssh_module = prefs_register_protocol(proto_ssh, NULL((void*)0));
7428#endif
7429 prefs_register_bool_preference(ssh_module, "desegment_buffers",
7430 "Reassemble SSH buffers spanning multiple TCP segments",
7431 "Whether the SSH dissector should reassemble SSH buffers spanning multiple TCP segments. "
7432 "To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
7433 &ssh_desegment);
7434 prefs_register_bool_preference(ssh_module, "ignore_ssh_mac_failed",
7435 "Ignore Message Authentication Code (MAC) failure",
7436 "For troubleshooting purposes, decrypt even if the "
7437 "Message Authentication Code (MAC) check fails.",
7438 &ssh_ignore_mac_failed);
7439
7440 ssh_master_key_map = g_hash_table_new_full(ssh_hash, ssh_equal, ssh_free_glib_allocated_bignum, ssh_free_glib_allocated_entry);
7441 prefs_register_filename_preference(ssh_module, "keylog_file", "Key log filename",
7442 "The path to the file which contains a list of key exchange secrets in the following format:\n"
7443 "\"<hex-encoded-cookie> <PRIVATE_KEY|SHARED_SECRET> <hex-encoded-key>\" (without quotes or leading spaces).\n",
7444 &pref_keylog_file, false0);
7445
7446 prefs_register_filename_preference(ssh_module, "debug_file", "SSH debug file",
7447 "Redirect SSH debug to the file specified. Leave empty to disable debugging "
7448 "or use \"" SSH_DEBUG_USE_STDERR"-" "\" to redirect output to stderr.",
7449 &ssh_debug_file_name, true1);
7450
7451 secrets_register_type(SECRETS_TYPE_SSH0x5353484b, ssh_secrets_block_callback);
7452
7453 ssh_handle = register_dissector("ssh", dissect_ssh, proto_ssh);
7454 reassembly_table_register(&ssh_reassembly_table, &tcp_reassembly_table_functions);
7455 register_shutdown_routine(ssh_shutdown);
7456}
7457
7458void
7459proto_reg_handoff_ssh(void)
7460{
7461#ifdef SSH_DECRYPT_DEBUG
7462 ssh_set_debug(ssh_debug_file_name);
7463#endif
7464 dissector_add_uint_range_with_preference("tcp.port", TCP_RANGE_SSH"22", ssh_handle);
7465 dissector_add_uint("sctp.port", SCTP_PORT_SSH22, ssh_handle);
7466 dissector_add_uint("sctp.ppi", SSH_PAYLOAD_PROTOCOL_ID45, ssh_handle);
7467 sftp_handle = find_dissector_add_dependency("sftp", proto_ssh);
7468 data_text_lines_handle = find_dissector_add_dependency("data-text-lines", proto_ssh);
7469
7470 heur_dissector_add("tcp", dissect_ssh_heur, "SSH over TCP", "ssh_tcp", proto_ssh, HEURISTIC_ENABLE);
7471}
7472
7473/*
7474 * Editor modelines - https://www.wireshark.org/tools/modelines.html
7475 *
7476 * Local variables:
7477 * c-basic-offset: 4
7478 * tab-width: 8
7479 * indent-tabs-mode: nil
7480 * End:
7481 *
7482 * vi: set shiftwidth=4 tabstop=8 expandtab:
7483 * :indentSize=4:tabSize=8:noTabs=true:
7484 */