suricata
detect-tls.c
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1 /*
2  * Copyright (C) 2011-2012 ANSSI
3  * Copyright (C) 2022 Open Information Security Foundation
4  * All rights reserved.
5  *
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7  * modification, are permitted provided that the following conditions
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9  * 1. Redistributions of source code must retain the above copyright
10  * notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  * notice, this list of conditions and the following disclaimer in the
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16  *
17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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27  */
28 
29 /**
30  * \file
31  *
32  * \author Pierre Chifflier <pierre.chifflier@ssi.gouv.fr>
33  *
34  * Implements the tls.* keywords
35  */
36 
37 #include "suricata-common.h"
38 #include "threads.h"
39 #include "decode.h"
40 
41 #include "detect.h"
42 #include "detect-parse.h"
43 #include "detect-content.h"
44 
45 #include "detect-engine.h"
46 #include "detect-engine-mpm.h"
47 #include "detect-engine-state.h"
48 
49 #include "flow.h"
50 #include "flow-var.h"
51 #include "flow-util.h"
52 
53 #include "util-debug.h"
54 #include "util-unittest.h"
55 #include "util-unittest-helper.h"
56 
57 #include "app-layer.h"
58 
59 #include "app-layer-ssl.h"
60 #include "detect-tls.h"
62 
63 #include "stream-tcp.h"
64 
65 /**
66  * \brief Regex for parsing "id" option, matching number or "number"
67  */
68 
69 #define PARSE_REGEX "^([A-z0-9\\s\\-\\.=,\\*@]+|\"[A-z0-9\\s\\-\\.=,\\*@]+\")\\s*$"
70 #define PARSE_REGEX_FINGERPRINT "^([A-z0-9\\:\\*]+|\"[A-z0-9\\:\\* ]+\")\\s*$"
71 
72 static DetectParseRegex subject_parse_regex;
73 static DetectParseRegex issuerdn_parse_regex;
74 static DetectParseRegex fingerprint_parse_regex;
75 
76 static int DetectTlsSubjectMatch (DetectEngineThreadCtx *,
77  Flow *, uint8_t, void *, void *,
78  const Signature *, const SigMatchCtx *);
79 static int DetectTlsSubjectSetup (DetectEngineCtx *, Signature *, const char *);
80 static void DetectTlsSubjectFree(DetectEngineCtx *, void *);
81 
82 static int DetectTlsIssuerDNMatch (DetectEngineThreadCtx *,
83  Flow *, uint8_t, void *, void *,
84  const Signature *, const SigMatchCtx *);
85 static int DetectTlsIssuerDNSetup (DetectEngineCtx *, Signature *, const char *);
86 static void DetectTlsIssuerDNFree(DetectEngineCtx *, void *);
87 
88 static int DetectTlsFingerprintSetup (DetectEngineCtx *, Signature *, const char *);
89 static void DetectTlsFingerprintFree(DetectEngineCtx *, void *);
90 
91 static int DetectTlsStoreSetup (DetectEngineCtx *, Signature *, const char *);
92 static int DetectTlsStorePostMatch (DetectEngineThreadCtx *det_ctx,
93  Packet *, const Signature *s, const SigMatchCtx *unused);
94 
95 static int g_tls_cert_list_id = 0;
96 static int g_tls_cert_fingerprint_list_id = 0;
97 
98 /**
99  * \brief Registration function for keyword: tls.version
100  */
101 void DetectTlsRegister (void)
102 {
103  sigmatch_table[DETECT_AL_TLS_SUBJECT].name = "tls.subject";
104  sigmatch_table[DETECT_AL_TLS_SUBJECT].desc = "match TLS/SSL certificate Subject field";
105  sigmatch_table[DETECT_AL_TLS_SUBJECT].url = "/rules/tls-keywords.html#tls-subject";
106  sigmatch_table[DETECT_AL_TLS_SUBJECT].AppLayerTxMatch = DetectTlsSubjectMatch;
107  sigmatch_table[DETECT_AL_TLS_SUBJECT].Setup = DetectTlsSubjectSetup;
108  sigmatch_table[DETECT_AL_TLS_SUBJECT].Free = DetectTlsSubjectFree;
111 
112  sigmatch_table[DETECT_AL_TLS_ISSUERDN].name = "tls.issuerdn";
113  sigmatch_table[DETECT_AL_TLS_ISSUERDN].desc = "match TLS/SSL certificate IssuerDN field";
114  sigmatch_table[DETECT_AL_TLS_ISSUERDN].url = "/rules/tls-keywords.html#tls-issuerdn";
115  sigmatch_table[DETECT_AL_TLS_ISSUERDN].AppLayerTxMatch = DetectTlsIssuerDNMatch;
116  sigmatch_table[DETECT_AL_TLS_ISSUERDN].Setup = DetectTlsIssuerDNSetup;
117  sigmatch_table[DETECT_AL_TLS_ISSUERDN].Free = DetectTlsIssuerDNFree;
120 
121  sigmatch_table[DETECT_AL_TLS_FINGERPRINT].name = "tls.fingerprint";
122  sigmatch_table[DETECT_AL_TLS_FINGERPRINT].desc = "match TLS/SSL certificate SHA1 fingerprint";
123  sigmatch_table[DETECT_AL_TLS_FINGERPRINT].url = "/rules/tls-keywords.html#tls-fingerprint";
124  sigmatch_table[DETECT_AL_TLS_FINGERPRINT].Setup = DetectTlsFingerprintSetup;
125  sigmatch_table[DETECT_AL_TLS_FINGERPRINT].Free = DetectTlsFingerprintFree;
128 
129  sigmatch_table[DETECT_AL_TLS_STORE].name = "tls_store";
131  sigmatch_table[DETECT_AL_TLS_STORE].desc = "store TLS/SSL certificate on disk";
132  sigmatch_table[DETECT_AL_TLS_STORE].url = "/rules/tls-keywords.html#tls-store";
133  sigmatch_table[DETECT_AL_TLS_STORE].Match = DetectTlsStorePostMatch;
134  sigmatch_table[DETECT_AL_TLS_STORE].Setup = DetectTlsStoreSetup;
136 
137  DetectSetupParseRegexes(PARSE_REGEX, &subject_parse_regex);
138  DetectSetupParseRegexes(PARSE_REGEX, &issuerdn_parse_regex);
139  DetectSetupParseRegexes(PARSE_REGEX_FINGERPRINT, &fingerprint_parse_regex);
140 
141  g_tls_cert_list_id = DetectBufferTypeRegister("tls_cert");
142  g_tls_cert_fingerprint_list_id = DetectBufferTypeRegister("tls.cert_fingerprint");
143 
146 
149 }
150 
151 /**
152  * \brief match the specified Subject on a tls session
153  *
154  * \param t pointer to thread vars
155  * \param det_ctx pointer to the pattern matcher thread
156  * \param p pointer to the current packet
157  * \param m pointer to the sigmatch that we will cast into DetectTlsData
158  *
159  * \retval 0 no match
160  * \retval 1 match
161  */
162 static int DetectTlsSubjectMatch (DetectEngineThreadCtx *det_ctx,
163  Flow *f, uint8_t flags, void *state, void *txv,
164  const Signature *s, const SigMatchCtx *m)
165 {
166  SCEnter();
167 
168  const DetectTlsData *tls_data = (const DetectTlsData *)m;
169  SSLState *ssl_state = (SSLState *)state;
170  if (ssl_state == NULL) {
171  SCLogDebug("no tls state, no match");
172  SCReturnInt(0);
173  }
174 
175  int ret = 0;
176 
177  SSLStateConnp *connp = NULL;
178  if (flags & STREAM_TOSERVER) {
179  connp = &ssl_state->client_connp;
180  } else {
181  connp = &ssl_state->server_connp;
182  }
183 
184  if (connp->cert0_subject != NULL) {
185  SCLogDebug("TLS: Subject is [%s], looking for [%s]\n",
186  connp->cert0_subject, tls_data->subject);
187 
188  if (strstr(connp->cert0_subject, tls_data->subject) != NULL) {
189  if (tls_data->flags & DETECT_CONTENT_NEGATED) {
190  ret = 0;
191  } else {
192  ret = 1;
193  }
194  } else {
195  if (tls_data->flags & DETECT_CONTENT_NEGATED) {
196  ret = 1;
197  } else {
198  ret = 0;
199  }
200  }
201  } else {
202  ret = 0;
203  }
204 
205  SCReturnInt(ret);
206 }
207 
208 /**
209  * \brief This function is used to parse IPV4 ip_id passed via keyword: "id"
210  *
211  * \param de_ctx Pointer to the detection engine context
212  * \param str Pointer to the user provided id option
213  *
214  * \retval id_d pointer to DetectTlsData on success
215  * \retval NULL on failure
216  */
217 static DetectTlsData *DetectTlsSubjectParse (DetectEngineCtx *de_ctx, const char *str, bool negate)
218 {
219  DetectTlsData *tls = NULL;
220  size_t pcre2_len;
221  const char *str_ptr;
222  char *orig = NULL;
223  char *tmp_str;
224  uint32_t flag = 0;
225 
226  pcre2_match_data *match = NULL;
227  int ret = DetectParsePcreExec(&subject_parse_regex, &match, str, 0, 0);
228  if (ret != 2) {
229  SCLogError("invalid tls.subject option");
230  goto error;
231  }
232 
233  if (negate)
234  flag = DETECT_CONTENT_NEGATED;
235 
236  int res = pcre2_substring_get_bynumber(match, 1, (PCRE2_UCHAR8 **)&str_ptr, &pcre2_len);
237  if (res < 0) {
238  SCLogError("pcre2_substring_get_bynumber failed");
239  goto error;
240  }
241 
242  /* We have a correct id option */
243  tls = SCMalloc(sizeof(DetectTlsData));
244  if (unlikely(tls == NULL))
245  goto error;
246  tls->subject = NULL;
247  tls->flags = flag;
248 
249  orig = SCStrdup((char*)str_ptr);
250  if (unlikely(orig == NULL)) {
251  goto error;
252  }
253  pcre2_substring_free((PCRE2_UCHAR *)str_ptr);
254 
255  tmp_str=orig;
256 
257  /* Let's see if we need to escape "'s */
258  if (tmp_str[0] == '"') {
259  tmp_str[strlen(tmp_str) - 1] = '\0';
260  tmp_str += 1;
261  }
262 
263  tls->subject = SCStrdup(tmp_str);
264  if (unlikely(tls->subject == NULL)) {
265  goto error;
266  }
267 
268  pcre2_match_data_free(match);
269  SCFree(orig);
270 
271  SCLogDebug("will look for TLS subject %s", tls->subject);
272 
273  return tls;
274 
275 error:
276  if (match) {
277  pcre2_match_data_free(match);
278  }
279  if (orig != NULL)
280  SCFree(orig);
281  if (tls != NULL)
282  DetectTlsSubjectFree(de_ctx, tls);
283  return NULL;
284 
285 }
286 
287 /**
288  * \brief this function is used to add the parsed "id" option
289  * \brief into the current signature
290  *
291  * \param de_ctx pointer to the Detection Engine Context
292  * \param s pointer to the Current Signature
293  * \param idstr pointer to the user provided "id" option
294  *
295  * \retval 0 on Success
296  * \retval -1 on Failure
297  */
298 static int DetectTlsSubjectSetup (DetectEngineCtx *de_ctx, Signature *s, const char *str)
299 {
300  DetectTlsData *tls = NULL;
301 
303  return -1;
304 
305  tls = DetectTlsSubjectParse(de_ctx, str, s->init_data->negated);
306  if (tls == NULL)
307  goto error;
308 
309  /* Okay so far so good, lets get this into a SigMatch
310  * and put it in the Signature. */
311 
313  de_ctx, s, DETECT_AL_TLS_SUBJECT, (SigMatchCtx *)tls, g_tls_cert_list_id) == NULL) {
314  goto error;
315  }
316  return 0;
317 
318 error:
319  if (tls != NULL)
320  DetectTlsSubjectFree(de_ctx, tls);
321  return -1;
322 
323 }
324 
325 /**
326  * \brief this function will free memory associated with DetectTlsData
327  *
328  * \param id_d pointer to DetectTlsData
329  */
330 static void DetectTlsSubjectFree(DetectEngineCtx *de_ctx, void *ptr)
331 {
332  DetectTlsData *id_d = (DetectTlsData *)ptr;
333  if (ptr == NULL)
334  return;
335  if (id_d->subject != NULL)
336  SCFree(id_d->subject);
337  SCFree(id_d);
338 }
339 
340 /**
341  * \brief match the specified IssuerDN on a tls session
342  *
343  * \param t pointer to thread vars
344  * \param det_ctx pointer to the pattern matcher thread
345  * \param p pointer to the current packet
346  * \param m pointer to the sigmatch that we will cast into DetectTlsData
347  *
348  * \retval 0 no match
349  * \retval 1 match
350  */
351 static int DetectTlsIssuerDNMatch (DetectEngineThreadCtx *det_ctx,
352  Flow *f, uint8_t flags, void *state, void *txv,
353  const Signature *s, const SigMatchCtx *m)
354 {
355  SCEnter();
356 
357  const DetectTlsData *tls_data = (const DetectTlsData *)m;
358  SSLState *ssl_state = (SSLState *)state;
359  if (ssl_state == NULL) {
360  SCLogDebug("no tls state, no match");
361  SCReturnInt(0);
362  }
363 
364  int ret = 0;
365 
366  SSLStateConnp *connp = NULL;
367  if (flags & STREAM_TOSERVER) {
368  connp = &ssl_state->client_connp;
369  } else {
370  connp = &ssl_state->server_connp;
371  }
372 
373  if (connp->cert0_issuerdn != NULL) {
374  SCLogDebug("TLS: IssuerDN is [%s], looking for [%s]\n",
375  connp->cert0_issuerdn, tls_data->issuerdn);
376 
377  if (strstr(connp->cert0_issuerdn, tls_data->issuerdn) != NULL) {
378  if (tls_data->flags & DETECT_CONTENT_NEGATED) {
379  ret = 0;
380  } else {
381  ret = 1;
382  }
383  } else {
384  if (tls_data->flags & DETECT_CONTENT_NEGATED) {
385  ret = 1;
386  } else {
387  ret = 0;
388  }
389  }
390  } else {
391  ret = 0;
392  }
393 
394  SCReturnInt(ret);
395 }
396 
397 /**
398  * \brief This function is used to parse IPV4 ip_id passed via keyword: "id"
399  *
400  * \param de_ctx Pointer to the detection engine context
401  * \param str Pointer to the user provided id option
402  *
403  * \retval id_d pointer to DetectTlsData on success
404  * \retval NULL on failure
405  */
406 static DetectTlsData *DetectTlsIssuerDNParse(DetectEngineCtx *de_ctx, const char *str, bool negate)
407 {
408  DetectTlsData *tls = NULL;
409  size_t pcre2_len;
410  const char *str_ptr;
411  char *orig = NULL;
412  char *tmp_str;
413  uint32_t flag = 0;
414 
415  pcre2_match_data *match = NULL;
416  int ret = DetectParsePcreExec(&issuerdn_parse_regex, &match, str, 0, 0);
417  if (ret != 2) {
418  SCLogError("invalid tls.issuerdn option");
419  goto error;
420  }
421 
422  if (negate)
423  flag = DETECT_CONTENT_NEGATED;
424 
425  int res = pcre2_substring_get_bynumber(match, 1, (PCRE2_UCHAR8 **)&str_ptr, &pcre2_len);
426  if (res < 0) {
427  SCLogError("pcre2_substring_get_bynumber failed");
428  goto error;
429  }
430 
431  /* We have a correct id option */
432  tls = SCMalloc(sizeof(DetectTlsData));
433  if (unlikely(tls == NULL))
434  goto error;
435  tls->issuerdn = NULL;
436  tls->flags = flag;
437 
438  orig = SCStrdup((char*)str_ptr);
439  if (unlikely(orig == NULL)) {
440  goto error;
441  }
442  pcre2_substring_free((PCRE2_UCHAR *)str_ptr);
443 
444  tmp_str=orig;
445 
446  /* Let's see if we need to escape "'s */
447  if (tmp_str[0] == '"')
448  {
449  tmp_str[strlen(tmp_str) - 1] = '\0';
450  tmp_str += 1;
451  }
452 
453  tls->issuerdn = SCStrdup(tmp_str);
454  if (unlikely(tls->issuerdn == NULL)) {
455  goto error;
456  }
457 
458  SCFree(orig);
459 
460  pcre2_match_data_free(match);
461  SCLogDebug("Will look for TLS issuerdn %s", tls->issuerdn);
462 
463  return tls;
464 
465 error:
466  if (match) {
467  pcre2_match_data_free(match);
468  }
469  if (orig != NULL)
470  SCFree(orig);
471  if (tls != NULL)
472  DetectTlsIssuerDNFree(de_ctx, tls);
473  return NULL;
474 
475 }
476 
477 /**
478  * \brief this function is used to add the parsed "id" option
479  * \brief into the current signature
480  *
481  * \param de_ctx pointer to the Detection Engine Context
482  * \param s pointer to the Current Signature
483  * \param idstr pointer to the user provided "id" option
484  *
485  * \retval 0 on Success
486  * \retval -1 on Failure
487  */
488 static int DetectTlsIssuerDNSetup (DetectEngineCtx *de_ctx, Signature *s, const char *str)
489 {
490  DetectTlsData *tls = NULL;
491 
493  return -1;
494 
495  tls = DetectTlsIssuerDNParse(de_ctx, str, s->init_data->negated);
496  if (tls == NULL)
497  goto error;
498 
499  /* Okay so far so good, lets get this into a SigMatch
500  * and put it in the Signature. */
501 
503  g_tls_cert_list_id) == NULL) {
504  goto error;
505  }
506  return 0;
507 
508 error:
509  if (tls != NULL)
510  DetectTlsIssuerDNFree(de_ctx, tls);
511  return -1;
512 
513 }
514 
515 /**
516  * \brief this function will free memory associated with DetectTlsData
517  *
518  * \param id_d pointer to DetectTlsData
519  */
520 static void DetectTlsIssuerDNFree(DetectEngineCtx *de_ctx, void *ptr)
521 {
522  DetectTlsData *id_d = (DetectTlsData *)ptr;
523  SCFree(id_d->issuerdn);
524  SCFree(id_d);
525 }
526 
527 /**
528  * \brief This function is used to parse fingerprint passed via keyword: "fingerprint"
529  *
530  * \param de_ctx Pointer to the detection engine context
531  * \param str Pointer to the user provided fingerprint option
532  *
533  * \retval pointer to DetectTlsData on success
534  * \retval NULL on failure
535  */
536 
537 /**
538  * \brief this function is used to add the parsed "fingerprint" option
539  * \brief into the current signature
540  *
541  * \param de_ctx pointer to the Detection Engine Context
542  * \param s pointer to the Current Signature
543  * \param id pointer to the user provided "fingerprint" option
544  *
545  * \retval 0 on Success
546  * \retval -1 on Failure
547  */
548 static int DetectTlsFingerprintSetup (DetectEngineCtx *de_ctx, Signature *s, const char *str)
549 {
550  if (DetectContentSetup(de_ctx, s, str) < 0) {
551  return -1;
552  }
553 
555  g_tls_cert_fingerprint_list_id, ALPROTO_TLS) < 0)
556  return -1;
557 
558  return 0;
559 }
560 
561 /**
562  * \brief this function will free memory associated with DetectTlsData
563  *
564  * \param pointer to DetectTlsData
565  */
566 static void DetectTlsFingerprintFree(DetectEngineCtx *de_ctx, void *ptr)
567 {
568  DetectTlsData *id_d = (DetectTlsData *)ptr;
569  SCFree(id_d);
570 }
571 
572 /**
573  * \brief this function is used to add the parsed "store" option
574  * \brief into the current signature
575  *
576  * \param de_ctx pointer to the Detection Engine Context
577  * \param s pointer to the Current Signature
578  * \param idstr pointer to the user provided "store" option
579  *
580  * \retval 0 on Success
581  * \retval -1 on Failure
582  */
583 static int DetectTlsStoreSetup (DetectEngineCtx *de_ctx, Signature *s, const char *str)
584 {
585 
587  return -1;
588 
589  s->flags |= SIG_FLAG_TLSSTORE;
590 
592  NULL) {
593  return -1;
594  }
595  return 0;
596 }
597 
598 /** \warning modifies Flow::alstate */
599 static int DetectTlsStorePostMatch (DetectEngineThreadCtx *det_ctx,
600  Packet *p, const Signature *s, const SigMatchCtx *unused)
601 {
602  SCEnter();
603 
604  if (p->flow == NULL)
605  return 0;
606 
607  SSLState *ssl_state = FlowGetAppState(p->flow);
608  if (ssl_state == NULL) {
609  SCLogDebug("no tls state, no match");
610  SCReturnInt(0);
611  }
612 
613  SSLStateConnp *connp;
614 
615  if (p->flow->flags & STREAM_TOSERVER) {
616  connp = &ssl_state->client_connp;
617  } else {
618  connp = &ssl_state->server_connp;
619  }
620 
621  connp->cert_log_flag |= SSL_TLS_LOG_PEM;
622  SCReturnInt(1);
623 }
SigTableElmt_::url
const char * url
Definition: detect.h:1299
SSLStateConnp_::cert0_subject
char * cert0_subject
Definition: app-layer-ssl.h:250
DetectSignatureSetAppProto
int DetectSignatureSetAppProto(Signature *s, AppProto alproto)
Definition: detect-parse.c:1753
SSLState_
SSLv[2.0|3.[0|1|2|3]] state structure.
Definition: app-layer-ssl.h:288
detect-content.h
detect-engine.h
SigTableElmt_::desc
const char * desc
Definition: detect.h:1298
PARSE_REGEX
#define PARSE_REGEX
Regex for parsing "id" option, matching number or "number".
Definition: detect-tls.c:69
TLS_STATE_CERT_READY
@ TLS_STATE_CERT_READY
Definition: app-layer-ssl.h:78
SigTableElmt_::Free
void(* Free)(DetectEngineCtx *, void *)
Definition: detect.h:1286
flow-util.h
DetectParseRegex
Definition: detect-parse.h:62
SigTableElmt_::name
const char * name
Definition: detect.h:1296
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unlikely
#define unlikely(expr)
Definition: util-optimize.h:35
detect-tls-cert-fingerprint.h
SSLState_::client_connp
SSLStateConnp client_connp
Definition: app-layer-ssl.h:306
ALPROTO_TLS
@ ALPROTO_TLS
Definition: app-layer-protos.h:33
SCLogDebug
#define SCLogDebug(...)
Definition: util-debug.h:269
DetectTlsData_::issuerdn
char * issuerdn
Definition: detect-tls.h:41
SSLState_::server_connp
SSLStateConnp server_connp
Definition: app-layer-ssl.h:307
SSLStateConnp_
Definition: app-layer-ssl.h:230
threads.h
Flow_
Flow data structure.
Definition: flow.h:351
SigTableElmt_::flags
uint16_t flags
Definition: detect.h:1290
DetectEngineCtx_
main detection engine ctx
Definition: detect.h:839
SigTableElmt_::AppLayerTxMatch
int(* AppLayerTxMatch)(DetectEngineThreadCtx *, Flow *, uint8_t flags, void *alstate, void *txv, const Signature *, const SigMatchCtx *)
Definition: detect.h:1267
DetectTlsData_
Definition: detect-tls.h:37
DetectParsePcreExec
int DetectParsePcreExec(DetectParseRegex *parse_regex, pcre2_match_data **match, const char *str, int start_offset, int options)
Definition: detect-parse.c:2674
m
SCMutex m
Definition: flow-hash.h:6
DetectTlsData_::flags
uint32_t flags
Definition: detect-tls.h:39
SIG_FLAG_TOCLIENT
#define SIG_FLAG_TOCLIENT
Definition: detect.h:267
SigTableElmt_::Setup
int(* Setup)(DetectEngineCtx *, Signature *, const char *)
Definition: detect.h:1281
util-unittest.h
SSLStateConnp_::cert0_issuerdn
char * cert0_issuerdn
Definition: app-layer-ssl.h:251
util-unittest-helper.h
DETECT_AL_TLS_CERT_SUBJECT
@ DETECT_AL_TLS_CERT_SUBJECT
Definition: detect-engine-register.h:240
SIGMATCH_QUOTES_MANDATORY
#define SIGMATCH_QUOTES_MANDATORY
Definition: detect.h:1492
DETECT_SM_LIST_POSTMATCH
@ DETECT_SM_LIST_POSTMATCH
Definition: detect.h:124
DetectTlsData_::subject
char * subject
Definition: detect-tls.h:40
PARSE_REGEX_FINGERPRINT
#define PARSE_REGEX_FINGERPRINT
Definition: detect-tls.c:70
SIG_FLAG_TOSERVER
#define SIG_FLAG_TOSERVER
Definition: detect.h:266
decode.h
util-debug.h
de_ctx
DetectEngineCtx * de_ctx
Definition: fuzz_siginit.c:17
DetectContentSetup
int DetectContentSetup(DetectEngineCtx *de_ctx, Signature *s, const char *contentstr)
Function to setup a content pattern.
Definition: detect-content.c:328
DetectEngineThreadCtx_
Definition: detect.h:1095
DETECT_AL_TLS_CERT_ISSUER
@ DETECT_AL_TLS_CERT_ISSUER
Definition: detect-engine-register.h:239
DetectSetupParseRegexes
void DetectSetupParseRegexes(const char *parse_str, DetectParseRegex *detect_parse)
Definition: detect-parse.c:2791
SCEnter
#define SCEnter(...)
Definition: util-debug.h:271
DETECT_AL_TLS_SUBJECT
@ DETECT_AL_TLS_SUBJECT
Definition: detect-engine-register.h:121
detect-engine-mpm.h
detect.h
DETECT_CONTENT_NEGATED
#define DETECT_CONTENT_NEGATED
Definition: detect-content.h:40
SigTableElmt_::alternative
uint16_t alternative
Definition: detect.h:1294
Signature_::flags
uint32_t flags
Definition: detect.h:597
DetectEngineContentModifierBufferSetup
int DetectEngineContentModifierBufferSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg, int sm_type, int sm_list, AppProto alproto)
Definition: detect-parse.c:205
Packet_
Definition: decode.h:437
SIGMATCH_HANDLE_NEGATION
#define SIGMATCH_HANDLE_NEGATION
Definition: detect.h:1496
Signature_::init_data
SignatureInitData * init_data
Definition: detect.h:665
detect-engine-state.h
Data structures and function prototypes for keeping state for the detection engine.
SignatureInitData_::negated
bool negated
Definition: detect.h:540
SigTableElmt_::Match
int(* Match)(DetectEngineThreadCtx *, Packet *, const Signature *, const SigMatchCtx *)
Definition: detect.h:1264
SigMatchCtx_
Used to start a pointer to SigMatch context Should never be dereferenced without casting to something...
Definition: detect.h:345
DETECT_AL_TLS_CERT_FINGERPRINT
@ DETECT_AL_TLS_CERT_FINGERPRINT
Definition: detect-engine-register.h:242
DetectTlsRegister
void DetectTlsRegister(void)
Registration function for keyword: tls.version.
Definition: detect-tls.c:101
Packet_::flow
struct Flow_ * flow
Definition: decode.h:476
DetectBufferTypeRegister
int DetectBufferTypeRegister(const char *name)
Definition: detect-engine.c:1008
flags
uint8_t flags
Definition: decode-gre.h:0
SigTableElmt_::alias
const char * alias
Definition: detect.h:1297
detect-tls.h
suricata-common.h
sigmatch_table
SigTableElmt sigmatch_table[DETECT_TBLSIZE]
Definition: detect-parse.c:127
SCStrdup
#define SCStrdup(s)
Definition: util-mem.h:56
DetectEngineInspectGenericList
uint8_t DetectEngineInspectGenericList(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, const struct DetectEngineAppInspectionEngine_ *engine, const Signature *s, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id)
Do the content inspection & validation for a signature.
Definition: detect-engine.c:2079
SSL_TLS_LOG_PEM
#define SSL_TLS_LOG_PEM
Definition: app-layer-ssl.h:138
SCMalloc
#define SCMalloc(sz)
Definition: util-mem.h:47
str
#define str(s)
Definition: suricata-common.h:291
SCLogError
#define SCLogError(...)
Macro used to log ERROR messages.
Definition: util-debug.h:261
SCFree
#define SCFree(p)
Definition: util-mem.h:61
Flow_::flags
uint32_t flags
Definition: flow.h:421
detect-parse.h
Signature_
Signature container.
Definition: detect.h:596
SSLStateConnp_::cert_log_flag
uint32_t cert_log_flag
Definition: app-layer-ssl.h:267
DETECT_AL_TLS_STORE
@ DETECT_AL_TLS_STORE
Definition: detect-engine-register.h:128
DETECT_AL_TLS_FINGERPRINT
@ DETECT_AL_TLS_FINGERPRINT
Definition: detect-engine-register.h:127
SIGMATCH_NOOPT
#define SIGMATCH_NOOPT
Definition: detect.h:1476
DetectAppLayerInspectEngineRegister
void DetectAppLayerInspectEngineRegister(const char *name, AppProto alproto, uint32_t dir, int progress, InspectEngineFuncPtr Callback, InspectionBufferGetDataPtr GetData)
register inspect engine at start up time
Definition: detect-engine.c:169
SigMatchAppendSMToList
SigMatch * SigMatchAppendSMToList(DetectEngineCtx *de_ctx, Signature *s, uint16_t type, SigMatchCtx *ctx, const int list)
Append a SigMatch to the list type.
Definition: detect-parse.c:447
SIG_FLAG_TLSSTORE
#define SIG_FLAG_TLSSTORE
Definition: detect.h:269
flow.h
SCReturnInt
#define SCReturnInt(x)
Definition: util-debug.h:275
flow-var.h
DETECT_AL_TLS_ISSUERDN
@ DETECT_AL_TLS_ISSUERDN
Definition: detect-engine-register.h:122
app-layer-ssl.h
app-layer.h