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detect: add tls.certs keyword

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Add keyword to do "raw" matching on each of the certificates in the
TLS certificate sticky buffer.

Example:
  alert tls any any -> any any (msg:"tls.certs test"; tls.certs; \
          content:"|01 02 03 04|"; sid:1;)
pull/3859/head
Mats Klepsland 7 years ago
parent edae50de94
commit ba857e9739
6 changed files with 656 additions and 0 deletions
Show Stats Download Patch File Download Diff File

1
src/Makefile.am
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@ -112,6 +112,7 @@ detect-tls-cert-issuer.c detect-tls-cert-issuer.h \
detect-tls-cert-subject.c detect-tls-cert-subject.h \
detect-tls-cert-serial.c detect-tls-cert-serial.h \
detect-tls-cert-fingerprint.c detect-tls-cert-fingerprint.h \
detect-tls-certs.c detect-tls-certs.h \
detect-dsize.c detect-dsize.h \
detect-engine.c detect-engine.h \
detect-engine-address.c detect-engine-address.h \

2
src/detect-engine-register.c
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@ -47,6 +47,7 @@
#include "detect-engine-dcepayload.h"
#include "detect-dns-query.h"
#include "detect-tls-sni.h"
#include "detect-tls-certs.h"
#include "detect-tls-cert-fingerprint.h"
#include "detect-tls-cert-issuer.h"
#include "detect-tls-cert-subject.h"
@ -432,6 +433,7 @@ void SigTableSetup(void)
DetectTlsSubjectRegister();
DetectTlsSerialRegister();
DetectTlsFingerprintRegister();
DetectTlsCertsRegister();
DetectTlsJa3HashRegister();
DetectTlsJa3StringRegister();

1
src/detect-engine-register.h
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@ -194,6 +194,7 @@ enum {
DETECT_AL_DNS_QUERY,
DETECT_AL_TLS_SNI,
DETECT_AL_TLS_CERTS,
DETECT_AL_TLS_CERT_ISSUER,
DETECT_AL_TLS_CERT_SUBJECT,
DETECT_AL_TLS_CERT_SERIAL,

260
src/detect-tls-certs.c
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@ -0,0 +1,260 @@
/* Copyright (C) 2019 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Mats Klepsland <mats.klepsland@gmail.com>
*
* Implements support for tls.certs keyword.
*/
#include "suricata-common.h"
#include "threads.h"
#include "debug.h"
#include "decode.h"
#include "detect.h"
#include "detect-parse.h"
#include "detect-engine.h"
#include "detect-engine-mpm.h"
#include "detect-engine-prefilter.h"
#include "detect-engine-content-inspection.h"
#include "detect-content.h"
#include "detect-pcre.h"
#include "detect-tls-certs.h"
#include "flow.h"
#include "flow-util.h"
#include "flow-var.h"
#include "util-debug.h"
#include "util-unittest.h"
#include "util-spm.h"
#include "util-print.h"
#include "stream-tcp.h"
#include "app-layer.h"
#include "app-layer-ssl.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
static int DetectTlsCertsSetup(DetectEngineCtx *, Signature *, const char *);
#ifdef UNITTESTS
static void DetectTlsCertsRegisterTests(void);
#endif
static int DetectEngineInspectTlsCerts(DetectEngineCtx *de_ctx,
DetectEngineThreadCtx *det_ctx,
const DetectEngineAppInspectionEngine *engine,
const Signature *s, Flow *f, uint8_t flags, void *alstate, void *txv,
uint64_t tx_id);
static int PrefilterMpmTlsCertsRegister(DetectEngineCtx *de_ctx,
SigGroupHead *sgh, MpmCtx *mpm_ctx,
const DetectMpmAppLayerRegistery *mpm_reg, int list_id);
static int g_tls_certs_buffer_id = 0;
struct TlsCertsGetDataArgs {
int local_id; /**< used as index into thread inspect array */
SSLCertsChain *cert;
};
typedef struct PrefilterMpmTlsCerts {
int list_id;
const MpmCtx *mpm_ctx;
const DetectEngineTransforms *transforms;
} PrefilterMpmTlsCerts;
/**
* \brief Registration function for keyword: tls.certs
*/
void DetectTlsCertsRegister(void)
{
sigmatch_table[DETECT_AL_TLS_CERTS].name = "tls.certs";
sigmatch_table[DETECT_AL_TLS_CERTS].desc = "content modifier to match the TLS certificate sticky buffer";
sigmatch_table[DETECT_AL_TLS_CERTS].url = DOC_URL DOC_VERSION "/rules/tls-keywords.html#tls-certs";
sigmatch_table[DETECT_AL_TLS_CERTS].Setup = DetectTlsCertsSetup;
#ifdef UNITTESTS
sigmatch_table[DETECT_AL_TLS_CERTS].RegisterTests = DetectTlsCertsRegisterTests;
#endif
sigmatch_table[DETECT_AL_TLS_CERTS].flags |= SIGMATCH_NOOPT;
sigmatch_table[DETECT_AL_TLS_CERTS].flags |= SIGMATCH_INFO_STICKY_BUFFER;
DetectAppLayerInspectEngineRegister2("tls.certs", ALPROTO_TLS,
SIG_FLAG_TOCLIENT, TLS_STATE_CERT_READY,
DetectEngineInspectTlsCerts, NULL);
DetectAppLayerMpmRegister2("tls.certs", SIG_FLAG_TOCLIENT, 2,
PrefilterMpmTlsCertsRegister, NULL, ALPROTO_TLS,
TLS_STATE_CERT_READY);
DetectBufferTypeSetDescriptionByName("tls.certs", "TLS certificate");
g_tls_certs_buffer_id = DetectBufferTypeGetByName("tls.certs");
}
/**
* \brief This function setup the tls.certs modifier keyword
*
* \param de_ctx Pointer to the Detect Engine Context
* \param s Pointer to the Signature to which the keyword belongs
* \param str Should hold an empty string always
*
* \retval 0 On success
* \retval -1 On failure
*/
static int DetectTlsCertsSetup(DetectEngineCtx *de_ctx, Signature *s,
const char *str)
{
if (DetectBufferSetActiveList(s, g_tls_certs_buffer_id) < 0)
return -1;
if (DetectSignatureSetAppProto(s, ALPROTO_TLS) < 0)
return -1;
return 0;
}
static InspectionBuffer *TlsCertsGetData(DetectEngineThreadCtx *det_ctx,
const DetectEngineTransforms *transforms, Flow *f,
struct TlsCertsGetDataArgs *cbdata, int list_id)
{
SCEnter();
InspectionBufferMultipleForList *fb = InspectionBufferGetMulti(det_ctx, list_id);
InspectionBuffer *buffer = InspectionBufferMultipleForListGet(fb, cbdata->local_id);
if (buffer == NULL)
return NULL;
const SSLState *ssl_state = (SSLState *)f->alstate;
if (TAILQ_EMPTY(&ssl_state->server_connp.certs)) {
return NULL;
}
if (cbdata->cert == NULL) {
cbdata->cert = TAILQ_FIRST(&ssl_state->server_connp.certs);
} else {
cbdata->cert = TAILQ_NEXT(cbdata->cert, next);
}
if (cbdata->cert == NULL) {
return NULL;
}
InspectionBufferSetup(buffer, cbdata->cert->cert_data,
cbdata->cert->cert_len);
InspectionBufferApplyTransforms(buffer, transforms);
SCReturnPtr(buffer, "InspectionBuffer");
}
static int DetectEngineInspectTlsCerts(DetectEngineCtx *de_ctx,
DetectEngineThreadCtx *det_ctx,
const DetectEngineAppInspectionEngine *engine,
const Signature *s, Flow *f, uint8_t flags, void *alstate, void *txv,
uint64_t tx_id)
{
const DetectEngineTransforms *transforms = NULL;
if (!engine->mpm) {
transforms = engine->v2.transforms;
}
struct TlsCertsGetDataArgs cbdata = { 0, NULL };
while (1)
{
InspectionBuffer *buffer = TlsCertsGetData(det_ctx, transforms, f,
&cbdata, engine->sm_list);
if (buffer == NULL || buffer->inspect == NULL)
break;
det_ctx->buffer_offset = 0;
det_ctx->discontinue_matching = 0;
det_ctx->inspection_recursion_counter = 0;
const int match = DetectEngineContentInspection(de_ctx, det_ctx, s, engine->smd,
NULL, f, (uint8_t *)buffer->inspect,
buffer->inspect_len,
buffer->inspect_offset, DETECT_CI_FLAGS_SINGLE,
DETECT_ENGINE_CONTENT_INSPECTION_MODE_STATE);
if (match == 1) {
return DETECT_ENGINE_INSPECT_SIG_MATCH;
}
cbdata.local_id++;
}
return DETECT_ENGINE_INSPECT_SIG_NO_MATCH;
}
static void PrefilterTxTlsCerts(DetectEngineThreadCtx *det_ctx,
const void *pectx, Packet *p, Flow *f, void *txv,
const uint64_t idx, const uint8_t flags)
{
SCEnter();
const PrefilterMpmTlsCerts *ctx = (const PrefilterMpmTlsCerts *)pectx;
const MpmCtx *mpm_ctx = ctx->mpm_ctx;
const int list_id = ctx->list_id;
struct TlsCertsGetDataArgs cbdata = { 0, NULL };
while (1)
{
InspectionBuffer *buffer = TlsCertsGetData(det_ctx, ctx->transforms,
f, &cbdata, list_id);
if (buffer == NULL)
break;
if (buffer->inspect_len >= mpm_ctx->minlen) {
(void)mpm_table[mpm_ctx->mpm_type].Search(mpm_ctx,
&det_ctx->mtcu, &det_ctx->pmq,
buffer->inspect, buffer->inspect_len);
}
cbdata.local_id++;
}
}
static void PrefilterMpmTlsCertsFree(void *ptr)
{
SCFree(ptr);
}
static int PrefilterMpmTlsCertsRegister(DetectEngineCtx *de_ctx,
SigGroupHead *sgh, MpmCtx *mpm_ctx,
const DetectMpmAppLayerRegistery *mpm_reg, int list_id)
{
PrefilterMpmTlsCerts *pectx = SCCalloc(1, sizeof(*pectx));
if (pectx == NULL)
return -1;
pectx->list_id = list_id;
pectx->mpm_ctx = mpm_ctx;
pectx->transforms = &mpm_reg->v2.transforms;
return PrefilterAppendTxEngine(de_ctx, sgh, PrefilterTxTlsCerts,
mpm_reg->v2.alproto, mpm_reg->v2.tx_min_progress,
pectx, PrefilterMpmTlsCertsFree, mpm_reg->name);
}
#ifdef UNITTESTS
#include "tests/detect-tls-certs.c"
#endif

29
src/detect-tls-certs.h
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@ -0,0 +1,29 @@
/* Copyright (C) 2019 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Mats Klepsland <mats.klepsland@gmail.com>
*/
#ifndef __DETECT_TLS_CERTS_H__
#define __DETECT_TLS_CERTS_H__
void DetectTlsCertsRegister(void);
#endif /* __DETECT_TLS_CERTS_H__ */

363
src/tests/detect-tls-certs.c
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@ -0,0 +1,363 @@
/* Copyright (C) 2019 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Mats Klepsland <mats.klepsland@gmail.com>
*
*/
/**
* \test Test that a signature containing tls.certs is correctly parsed
* and that the keyword is registred.
*/
static int DetectTlsCertsTest01(void)
{
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
FAIL_IF_NULL(de_ctx);
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tls any any -> any any "
"(msg:\"Testing tls.certs\"; tls.certs; "
"content:\"|01 02 03 04 05|\"; sid:1;)");
FAIL_IF_NULL(de_ctx->sig_list);
/* sm should not be in the MATCH list */
SigMatch *sm = de_ctx->sig_list->sm_lists[DETECT_SM_LIST_MATCH];
FAIL_IF_NOT_NULL(sm);
sm = de_ctx->sig_list->sm_lists[g_tls_certs_buffer_id];
FAIL_IF_NULL(sm);
FAIL_IF(sm->type != DETECT_CONTENT);
FAIL_IF_NOT_NULL(sm->next);
SigCleanSignatures(de_ctx);
DetectEngineCtxFree(de_ctx);
PASS;
}
/**
* \test Test matching on bytes in a certificate
*/
static int DetectTlsCertsTest02(void)
{
/* client hello */
uint8_t client_hello[] = {
0x16, 0x03, 0x01, 0x00, 0xc8, 0x01, 0x00, 0x00,
0xc4, 0x03, 0x03, 0xd6, 0x08, 0x5a, 0xa2, 0x86,
0x5b, 0x85, 0xd4, 0x40, 0xab, 0xbe, 0xc0, 0xbc,
0x41, 0xf2, 0x26, 0xf0, 0xfe, 0x21, 0xee, 0x8b,
0x4c, 0x7e, 0x07, 0xc8, 0xec, 0xd2, 0x00, 0x46,
0x4c, 0xeb, 0xb7, 0x00, 0x00, 0x16, 0xc0, 0x2b,
0xc0, 0x2f, 0xc0, 0x0a, 0xc0, 0x09, 0xc0, 0x13,
0xc0, 0x14, 0x00, 0x33, 0x00, 0x39, 0x00, 0x2f,
0x00, 0x35, 0x00, 0x0a, 0x01, 0x00, 0x00, 0x85,
0x00, 0x00, 0x00, 0x12, 0x00, 0x10, 0x00, 0x00,
0x0d, 0x77, 0x77, 0x77, 0x2e, 0x67, 0x6f, 0x6f,
0x67, 0x6c, 0x65, 0x2e, 0x6e, 0x6f, 0xff, 0x01,
0x00, 0x01, 0x00, 0x00, 0x0a, 0x00, 0x08, 0x00,
0x06, 0x00, 0x17, 0x00, 0x18, 0x00, 0x19, 0x00,
0x0b, 0x00, 0x02, 0x01, 0x00, 0x00, 0x23, 0x00,
0x00, 0x33, 0x74, 0x00, 0x00, 0x00, 0x10, 0x00,
0x29, 0x00, 0x27, 0x05, 0x68, 0x32, 0x2d, 0x31,
0x36, 0x05, 0x68, 0x32, 0x2d, 0x31, 0x35, 0x05,
0x68, 0x32, 0x2d, 0x31, 0x34, 0x02, 0x68, 0x32,
0x08, 0x73, 0x70, 0x64, 0x79, 0x2f, 0x33, 0x2e,
0x31, 0x08, 0x68, 0x74, 0x74, 0x70, 0x2f, 0x31,
0x2e, 0x31, 0x00, 0x05, 0x00, 0x05, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x0d, 0x00, 0x16, 0x00,
0x14, 0x04, 0x01, 0x05, 0x01, 0x06, 0x01, 0x02,
0x01, 0x04, 0x03, 0x05, 0x03, 0x06, 0x03, 0x02,
0x03, 0x04, 0x02, 0x02, 0x02
};
/* server hello */
uint8_t server_hello[] = {
0x16, 0x03, 0x03, 0x00, 0x48, 0x02, 0x00, 0x00,
0x44, 0x03, 0x03, 0x57, 0x91, 0xb8, 0x63, 0xdd,
0xdb, 0xbb, 0x23, 0xcf, 0x0b, 0x43, 0x02, 0x1d,
0x46, 0x11, 0x27, 0x5c, 0x98, 0xcf, 0x67, 0xe1,
0x94, 0x3d, 0x62, 0x7d, 0x38, 0x48, 0x21, 0x23,
0xa5, 0x62, 0x31, 0x00, 0xc0, 0x2f, 0x00, 0x00,
0x1c, 0xff, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x23, 0x00, 0x00, 0x00, 0x10,
0x00, 0x05, 0x00, 0x03, 0x02, 0x68, 0x32, 0x00,
0x0b, 0x00, 0x02, 0x01, 0x00
};
/* certificate */
uint8_t certificate[] = {
0x16, 0x03, 0x03, 0x04, 0x93, 0x0b, 0x00, 0x04,
0x8f, 0x00, 0x04, 0x8c, 0x00, 0x04, 0x89, 0x30,
0x82, 0x04, 0x85, 0x30, 0x82, 0x03, 0x6d, 0xa0,
0x03, 0x02, 0x01, 0x02, 0x02, 0x08, 0x5c, 0x19,
0xb7, 0xb1, 0x32, 0x3b, 0x1c, 0xa1, 0x30, 0x0d,
0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
0x01, 0x01, 0x0b, 0x05, 0x00, 0x30, 0x49, 0x31,
0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06,
0x13, 0x02, 0x55, 0x53, 0x31, 0x13, 0x30, 0x11,
0x06, 0x03, 0x55, 0x04, 0x0a, 0x13, 0x0a, 0x47,
0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x20, 0x49, 0x6e,
0x63, 0x31, 0x25, 0x30, 0x23, 0x06, 0x03, 0x55,
0x04, 0x03, 0x13, 0x1c, 0x47, 0x6f, 0x6f, 0x67,
0x6c, 0x65, 0x20, 0x49, 0x6e, 0x74, 0x65, 0x72,
0x6e, 0x65, 0x74, 0x20, 0x41, 0x75, 0x74, 0x68,
0x6f, 0x72, 0x69, 0x74, 0x79, 0x20, 0x47, 0x32,
0x30, 0x1e, 0x17, 0x0d, 0x31, 0x36, 0x30, 0x37,
0x31, 0x33, 0x31, 0x33, 0x32, 0x34, 0x35, 0x32,
0x5a, 0x17, 0x0d, 0x31, 0x36, 0x31, 0x30, 0x30,
0x35, 0x31, 0x33, 0x31, 0x36, 0x30, 0x30, 0x5a,
0x30, 0x65, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03,
0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53, 0x31,
0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08,
0x0c, 0x0a, 0x43, 0x61, 0x6c, 0x69, 0x66, 0x6f,
0x72, 0x6e, 0x69, 0x61, 0x31, 0x16, 0x30, 0x14,
0x06, 0x03, 0x55, 0x04, 0x07, 0x0c, 0x0d, 0x4d,
0x6f, 0x75, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x20,
0x56, 0x69, 0x65, 0x77, 0x31, 0x13, 0x30, 0x11,
0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c, 0x0a, 0x47,
0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x20, 0x49, 0x6e,
0x63, 0x31, 0x14, 0x30, 0x12, 0x06, 0x03, 0x55,
0x04, 0x03, 0x0c, 0x0b, 0x2a, 0x2e, 0x67, 0x6f,
0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x6e, 0x6f, 0x30,
0x82, 0x01, 0x22, 0x30, 0x0d, 0x06, 0x09, 0x2a,
0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01,
0x05, 0x00, 0x03, 0x82, 0x01, 0x0f, 0x00, 0x30,
0x82, 0x01, 0x0a, 0x02, 0x82, 0x01, 0x01, 0x00,
0xa5, 0x0a, 0xb9, 0xb1, 0xca, 0x36, 0xd1, 0xae,
0x22, 0x38, 0x07, 0x06, 0xc9, 0x1a, 0x56, 0x4f,
0xbb, 0xdf, 0xa8, 0x6d, 0xbd, 0xee, 0x76, 0x16,
0xbc, 0x53, 0x3c, 0x03, 0x6a, 0x5c, 0x94, 0x50,
0x87, 0x2f, 0x28, 0xb4, 0x4e, 0xd5, 0x9b, 0x8f,
0xfe, 0x02, 0xde, 0x2a, 0x83, 0x01, 0xf9, 0x45,
0x61, 0x0e, 0x66, 0x0e, 0x24, 0x22, 0xe2, 0x59,
0x66, 0x0d, 0xd3, 0xe9, 0x77, 0x8a, 0x7e, 0x42,
0xaa, 0x5a, 0xf9, 0x05, 0xbf, 0x30, 0xc7, 0x03,
0x2b, 0xdc, 0xa6, 0x9c, 0xe0, 0x9f, 0x0d, 0xf1,
0x28, 0x19, 0xf8, 0xf2, 0x02, 0xfa, 0xbd, 0x62,
0xa0, 0xf3, 0x02, 0x2b, 0xcd, 0xf7, 0x09, 0x04,
0x3b, 0x52, 0xd8, 0x65, 0x4b, 0x4a, 0x70, 0xe4,
0x57, 0xc9, 0x2e, 0x2a, 0xf6, 0x9c, 0x6e, 0xd8,
0xde, 0x01, 0x52, 0xc9, 0x6f, 0xe9, 0xef, 0x82,
0xbc, 0x0b, 0x95, 0xb2, 0xef, 0xcb, 0x91, 0xa6,
0x0b, 0x2d, 0x14, 0xc6, 0x00, 0xa9, 0x33, 0x86,
0x64, 0x00, 0xd4, 0x92, 0x19, 0x53, 0x3d, 0xfd,
0xcd, 0xc6, 0x1a, 0xf2, 0x0e, 0x67, 0xc2, 0x1d,
0x2c, 0xe0, 0xe8, 0x29, 0x97, 0x1c, 0xb6, 0xc4,
0xb2, 0x02, 0x0c, 0x83, 0xb8, 0x60, 0x61, 0xf5,
0x61, 0x2d, 0x73, 0x5e, 0x85, 0x4d, 0xbd, 0x0d,
0xe7, 0x1a, 0x37, 0x56, 0x8d, 0xe5, 0x50, 0x0c,
0xc9, 0x64, 0x4c, 0x11, 0xea, 0xf3, 0xcb, 0x26,
0x34, 0xbd, 0x02, 0xf5, 0xc1, 0xfb, 0xa2, 0xec,
0x27, 0xbb, 0x60, 0xbe, 0x0b, 0xf6, 0xe7, 0x3c,
0x2d, 0xc9, 0xe7, 0xb0, 0x30, 0x28, 0x17, 0x3d,
0x90, 0xf1, 0x63, 0x8e, 0x49, 0xf7, 0x15, 0x78,
0x21, 0xcc, 0x45, 0xe6, 0x86, 0xb2, 0xd8, 0xb0,
0x2e, 0x5a, 0xb0, 0x58, 0xd3, 0xb6, 0x11, 0x40,
0xae, 0x81, 0x1f, 0x6b, 0x7a, 0xaf, 0x40, 0x50,
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};
Flow f;
SSLState *ssl_state = NULL;
TcpSession ssn;
Packet *p1 = NULL;
Packet *p2 = NULL;
Packet *p3 = NULL;
ThreadVars tv;
DetectEngineThreadCtx *det_ctx = NULL;
AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc();
memset(&tv, 0, sizeof(ThreadVars));
memset(&f, 0, sizeof(Flow));
memset(&ssn, 0, sizeof(TcpSession));
p1 = UTHBuildPacketReal(client_hello, sizeof(client_hello), IPPROTO_TCP,
"192.168.1.5", "192.168.1.1", 51251, 443);
p2 = UTHBuildPacketReal(server_hello, sizeof(server_hello), IPPROTO_TCP,
"192.168.1.1", "192.168.1.5", 443, 51251);
p3 = UTHBuildPacketReal(certificate, sizeof(certificate), IPPROTO_TCP,
"192.168.1.1", "192.168.1.5", 443, 51251);
FLOW_INITIALIZE(&f);
f.flags |= FLOW_IPV4;
f.proto = IPPROTO_TCP;
f.protomap = FlowGetProtoMapping(f.proto);
f.alproto = ALPROTO_TLS;
p1->flow = &f;
p1->flags |= PKT_HAS_FLOW | PKT_STREAM_EST;
p1->flowflags |= FLOW_PKT_TOSERVER;
p1->flowflags |= FLOW_PKT_ESTABLISHED;
p1->pcap_cnt = 1;
p2->flow = &f;
p2->flags |= PKT_HAS_FLOW | PKT_STREAM_EST;
p2->flowflags |= FLOW_PKT_TOCLIENT;
p2->flowflags |= FLOW_PKT_ESTABLISHED;
p2->pcap_cnt = 2;
p3->flow = &f;
p3->flags |= PKT_HAS_FLOW | PKT_STREAM_EST;
p3->flowflags |= FLOW_PKT_TOCLIENT;
p3->flowflags |= FLOW_PKT_ESTABLISHED;
p3->pcap_cnt = 3;
StreamTcpInitConfig(TRUE);
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
FAIL_IF_NULL(de_ctx);
de_ctx->mpm_matcher = mpm_default_matcher;
de_ctx->flags |= DE_QUIET;
Signature *s = DetectEngineAppendSig(de_ctx, "alert tls any any -> any any "
"(msg:\"Test tls.certs\"; tls.certs; "
"content:\"|06 09 2a 86 48|\"; sid:1;)");
FAIL_IF_NULL(s);
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&tv, (void *)de_ctx, (void *)&det_ctx);
int r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_TLS,
STREAM_TOSERVER, client_hello,
sizeof(client_hello));
FAIL_IF(r != 0);
ssl_state = f.alstate;
FAIL_IF_NULL(ssl_state);
SigMatchSignatures(&tv, de_ctx, det_ctx, p1);
FAIL_IF(PacketAlertCheck(p1, 1));
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_TLS, STREAM_TOCLIENT,
server_hello, sizeof(server_hello));
FAIL_IF(r != 0);
SigMatchSignatures(&tv, de_ctx, det_ctx, p2);
FAIL_IF(PacketAlertCheck(p2, 1));
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_TLS, STREAM_TOCLIENT,
certificate, sizeof(certificate));
FAIL_IF(r != 0);
SigMatchSignatures(&tv, de_ctx, det_ctx, p3);
FAIL_IF_NOT(PacketAlertCheck(p3, 1));
AppLayerParserThreadCtxFree(alp_tctx);
DetectEngineThreadCtxDeinit(&tv, det_ctx);
DetectEngineCtxFree(de_ctx);
StreamTcpFreeConfig(TRUE);
FLOW_DESTROY(&f);
UTHFreePacket(p1);
UTHFreePacket(p2);
UTHFreePacket(p3);
PASS;
}
static void DetectTlsCertsRegisterTests(void)
{
UtRegisterTest("DetectTlsCertsTest01", DetectTlsCertsTest01);
UtRegisterTest("DetectTlsCertsTest02", DetectTlsCertsTest02);
}
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