/* Copyright (C) 2007-2016 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 Anoop Saldanha * * Implements support for ssl_state 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-state.h" #include "flow.h" #include "flow-var.h" #include "flow-util.h" #include "util-debug.h" #include "util-unittest.h" #include "util-unittest-helper.h" #include "app-layer.h" #include "app-layer-parser.h" #include "detect-ssl-state.h" #include "stream-tcp.h" #include "app-layer-ssl.h" #define PARSE_REGEX1 "^(!?)([_a-zA-Z0-9]+)(.*)$" static pcre *parse_regex1; static pcre_extra *parse_regex1_study; #define PARSE_REGEX2 "^(?:\\s*[|,]\\s*(!?)([_a-zA-Z0-9]+))(.*)$" static pcre *parse_regex2; static pcre_extra *parse_regex2_study; static int DetectSslStateMatch(ThreadVars *, DetectEngineThreadCtx *, Flow *, uint8_t, void *, void *, const Signature *, const SigMatchCtx *); static int DetectSslStateSetup(DetectEngineCtx *, Signature *, const char *); static void DetectSslStateRegisterTests(void); static void DetectSslStateFree(void *); static int InspectTlsGeneric(ThreadVars *tv, DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, const Signature *s, const SigMatchData *smd, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id); static int g_tls_generic_list_id = 0; /** * \brief Registers the keyword handlers for the "ssl_state" keyword. */ void DetectSslStateRegister(void) { sigmatch_table[DETECT_AL_SSL_STATE].name = "ssl_state"; sigmatch_table[DETECT_AL_SSL_STATE].AppLayerTxMatch = DetectSslStateMatch; sigmatch_table[DETECT_AL_SSL_STATE].Setup = DetectSslStateSetup; sigmatch_table[DETECT_AL_SSL_STATE].Free = DetectSslStateFree; sigmatch_table[DETECT_AL_SSL_STATE].RegisterTests = DetectSslStateRegisterTests; DetectSetupParseRegexes(PARSE_REGEX1, &parse_regex1, &parse_regex1_study); DetectSetupParseRegexes(PARSE_REGEX2, &parse_regex2, &parse_regex2_study); g_tls_generic_list_id = DetectBufferTypeRegister("tls_generic"); DetectBufferTypeSetDescriptionByName("tls_generic", "generic ssl/tls inspection"); DetectAppLayerInspectEngineRegister("tls_generic", ALPROTO_TLS, SIG_FLAG_TOSERVER, 0, InspectTlsGeneric); DetectAppLayerInspectEngineRegister("tls_generic", ALPROTO_TLS, SIG_FLAG_TOCLIENT, 0, InspectTlsGeneric); } static int InspectTlsGeneric(ThreadVars *tv, DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, const Signature *s, const SigMatchData *smd, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id) { return DetectEngineInspectGenericList(tv, de_ctx, det_ctx, s, smd, f, flags, alstate, txv, tx_id); } /** * \brief App layer match function ssl_state keyword. * * \param tv Pointer to threadvars. * \param det_ctx Pointer to the thread's detection context. * \param f Pointer to the flow. * \param flags Flags. * \param state App layer state. * \param s Sig we are currently inspecting. * \param m SigMatch we are currently inspecting. * * \retval 1 Match. * \retval 0 No match. */ static int DetectSslStateMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx, Flow *f, uint8_t flags, void *alstate, void *txv, const Signature *s, const SigMatchCtx *m) { const DetectSslStateData *ssd = (const DetectSslStateData *)m; SSLState *ssl_state = (SSLState *)alstate; if (ssl_state == NULL) { SCLogDebug("no app state, no match"); return 0; } uint32_t ssl_flags = ssl_state->current_flags; if ((ssd->flags & ssl_flags) ^ ssd->mask) { return 1; } return 0; } /** * \brief Parse the arg supplied with ssl_state and return it in a * DetectSslStateData instance. * * \param arg Pointer to the string to be parsed. * * \retval ssd Pointer to DetectSslStateData on succese. * \retval NULL On failure. */ static DetectSslStateData *DetectSslStateParse(const char *arg) { #define MAX_SUBSTRINGS 30 int ret = 0, res = 0; int ov1[MAX_SUBSTRINGS]; int ov2[MAX_SUBSTRINGS]; const char *str1; const char *str2; int negate = 0; uint32_t flags = 0, mask = 0; DetectSslStateData *ssd = NULL; ret = pcre_exec(parse_regex1, parse_regex1_study, arg, strlen(arg), 0, 0, ov1, MAX_SUBSTRINGS); if (ret < 1) { SCLogError(SC_ERR_INVALID_SIGNATURE, "Invalid arg \"%s\" supplied to " "ssl_state keyword.", arg); goto error; } res = pcre_get_substring((char *)arg, ov1, MAX_SUBSTRINGS, 1, &str1); if (res < 0) { SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed"); goto error; } negate = !strcmp("!", str1); pcre_free_substring(str1); res = pcre_get_substring((char *)arg, ov1, MAX_SUBSTRINGS, 2, &str1); if (res < 0) { SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed"); goto error; } if (strcmp("client_hello", str1) == 0) { flags |= DETECT_SSL_STATE_CLIENT_HELLO; if (negate) mask |= DETECT_SSL_STATE_CLIENT_HELLO; } else if (strcmp("server_hello", str1) == 0) { flags |= DETECT_SSL_STATE_SERVER_HELLO; if (negate) mask |= DETECT_SSL_STATE_SERVER_HELLO; } else if (strcmp("client_keyx", str1) == 0) { flags |= DETECT_SSL_STATE_CLIENT_KEYX; if (negate) mask |= DETECT_SSL_STATE_CLIENT_KEYX; } else if (strcmp("server_keyx", str1) == 0) { flags |= DETECT_SSL_STATE_SERVER_KEYX; if (negate) mask |= DETECT_SSL_STATE_SERVER_KEYX; } else if (strcmp("unknown", str1) == 0) { flags |= DETECT_SSL_STATE_UNKNOWN; if (negate) mask |= DETECT_SSL_STATE_UNKNOWN; } else { SCLogError(SC_ERR_INVALID_SIGNATURE, "Found invalid option \"%s\" " "in ssl_state keyword.", str1); goto error; } pcre_free_substring(str1); res = pcre_get_substring((char *)arg, ov1, MAX_SUBSTRINGS, 3, &str1); if (res < 0) { SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed"); goto error; } while (res > 0) { ret = pcre_exec(parse_regex2, parse_regex2_study, str1, strlen(str1), 0, 0, ov2, MAX_SUBSTRINGS); if (ret < 1) { SCLogError(SC_ERR_INVALID_SIGNATURE, "Invalid arg \"%s\" supplied to " "ssl_state keyword.", arg); goto error; } res = pcre_get_substring((char *)str1, ov2, MAX_SUBSTRINGS, 1, &str2); if (res < 0) { SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed"); goto error; } negate = !strcmp("!", str2); pcre_free_substring(str2); res = pcre_get_substring((char *)str1, ov2, MAX_SUBSTRINGS, 2, &str2); if (res <= 0) { SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed"); goto error; } if (strcmp("client_hello", str2) == 0) { flags |= DETECT_SSL_STATE_CLIENT_HELLO; if (negate) mask |= DETECT_SSL_STATE_CLIENT_HELLO; } else if (strcmp("server_hello", str2) == 0) { flags |= DETECT_SSL_STATE_SERVER_HELLO; if (negate) mask |= DETECT_SSL_STATE_SERVER_HELLO; } else if (strcmp("client_keyx", str2) == 0) { flags |= DETECT_SSL_STATE_CLIENT_KEYX; if (negate) mask |= DETECT_SSL_STATE_CLIENT_KEYX; } else if (strcmp("server_keyx", str2) == 0) { flags |= DETECT_SSL_STATE_SERVER_KEYX; if (negate) mask |= DETECT_SSL_STATE_SERVER_KEYX; } else if (strcmp("unknown", str2) == 0) { flags |= DETECT_SSL_STATE_UNKNOWN; if (negate) mask |= DETECT_SSL_STATE_UNKNOWN; } else { SCLogError(SC_ERR_INVALID_SIGNATURE, "Found invalid option \"%s\" " "in ssl_state keyword.", str2); goto error; } res = pcre_get_substring((char *)str1, ov2, MAX_SUBSTRINGS, 3, &str2); if (res < 0) { SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed"); goto error; } pcre_free_substring(str1); str1 = str2; } pcre_free_substring(str1); if ( (ssd = SCMalloc(sizeof(DetectSslStateData))) == NULL) { goto error; } ssd->flags = flags; ssd->mask = mask; return ssd; error: return NULL; } /** * \internal * \brief Setup function for ssl_state keyword. * * \param de_ctx Pointer to the Detection Engine Context. * \param s Pointer to the Current Signature * \param arg String holding the arg. * * \retval 0 On success. * \retval -1 On failure. */ static int DetectSslStateSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg) { DetectSslStateData *ssd = NULL; SigMatch *sm = NULL; if (DetectSignatureSetAppProto(s, ALPROTO_TLS) != 0) return -1; ssd = DetectSslStateParse(arg); if (ssd == NULL) goto error; sm = SigMatchAlloc(); if (sm == NULL) goto error; sm->type = DETECT_AL_SSL_STATE; sm->ctx = (SigMatchCtx*)ssd; SigMatchAppendSMToList(s, sm, g_tls_generic_list_id); return 0; error: if (ssd != NULL) DetectSslStateFree(ssd); if (sm != NULL) SCFree(sm); return -1; } /** * \brief Free memory associated with DetectSslStateData. * * \param ptr pointer to the data to be freed. */ static void DetectSslStateFree(void *ptr) { if (ptr != NULL) SCFree(ptr); return; } /************************************Unittests*********************************/ #ifdef UNITTESTS static int DetectSslStateTest01(void) { DetectSslStateData *ssd = DetectSslStateParse("client_hello"); FAIL_IF_NULL(ssd); FAIL_IF_NOT(ssd->flags == DETECT_SSL_STATE_CLIENT_HELLO); SCFree(ssd); PASS; } static int DetectSslStateTest02(void) { DetectSslStateData *ssd = DetectSslStateParse("server_hello , client_hello"); FAIL_IF_NULL(ssd); FAIL_IF_NOT(ssd->flags == (DETECT_SSL_STATE_SERVER_HELLO | DETECT_SSL_STATE_CLIENT_HELLO)); SCFree(ssd); PASS; } static int DetectSslStateTest03(void) { DetectSslStateData *ssd = DetectSslStateParse("server_hello , client_keyx , " "client_hello"); FAIL_IF_NULL(ssd); FAIL_IF_NOT(ssd->flags == (DETECT_SSL_STATE_SERVER_HELLO | DETECT_SSL_STATE_CLIENT_KEYX | DETECT_SSL_STATE_CLIENT_HELLO)); SCFree(ssd); PASS; } static int DetectSslStateTest04(void) { DetectSslStateData *ssd = DetectSslStateParse("server_hello , client_keyx , " "client_hello , server_keyx , " "unknown"); FAIL_IF_NULL(ssd); FAIL_IF_NOT(ssd->flags == (DETECT_SSL_STATE_SERVER_HELLO | DETECT_SSL_STATE_CLIENT_KEYX | DETECT_SSL_STATE_CLIENT_HELLO | DETECT_SSL_STATE_SERVER_KEYX | DETECT_SSL_STATE_UNKNOWN)); SCFree(ssd); PASS; } static int DetectSslStateTest05(void) { DetectSslStateData *ssd = DetectSslStateParse(", server_hello , client_keyx , " "client_hello , server_keyx , " "unknown"); FAIL_IF_NOT_NULL(ssd); PASS; } static int DetectSslStateTest06(void) { DetectSslStateData *ssd = DetectSslStateParse("server_hello , client_keyx , " "client_hello , server_keyx , " "unknown , "); FAIL_IF_NOT_NULL(ssd); PASS; } /** * \test Test a valid dce_iface entry for a bind and bind_ack */ static int DetectSslStateTest07(void) { uint8_t chello_buf[] = { 0x80, 0x67, 0x01, 0x03, 0x00, 0x00, 0x4e, 0x00, 0x00, 0x00, 0x10, 0x01, 0x00, 0x80, 0x03, 0x00, 0x80, 0x07, 0x00, 0xc0, 0x06, 0x00, 0x40, 0x02, 0x00, 0x80, 0x04, 0x00, 0x80, 0x00, 0x00, 0x39, 0x00, 0x00, 0x38, 0x00, 0x00, 0x35, 0x00, 0x00, 0x33, 0x00, 0x00, 0x32, 0x00, 0x00, 0x04, 0x00, 0x00, 0x05, 0x00, 0x00, 0x2f, 0x00, 0x00, 0x16, 0x00, 0x00, 0x13, 0x00, 0xfe, 0xff, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x15, 0x00, 0x00, 0x12, 0x00, 0xfe, 0xfe, 0x00, 0x00, 0x09, 0x00, 0x00, 0x64, 0x00, 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0x79, 0x22, 0x90, 0x75, 0xfd, 0xa6, 0xd5, 0xc4, 0xb8, 0xc4, 0x99, 0x4e, 0x1c, 0x05, 0x7c, 0x91, 0x59, 0xbe, 0x89, 0x0d, 0x3d, 0xc6, 0x8c, 0xa3, 0xcf, 0xf6, 0xba, 0x23, 0xdf, 0xb8, 0xae, 0x44, 0x68, 0x8a, 0x8f, 0xb9, 0x8b, 0xcb, 0x12, 0xda, 0xe6, 0xa2, 0xca, 0xa5, 0xa6, 0x55, 0xd9, 0xd2, 0xa1, 0xad, 0xba, 0x9b, 0x2c, 0x44, 0x95, 0x1d, 0x4a, 0x90, 0x59, 0x7f, 0x83, 0xae, 0x81, 0x5e, 0x3f, 0x92, 0xe0, 0x14, 0x41, 0x82, 0x4e, 0x7f, 0x53, 0xfd, 0x10, 0x23, 0xeb, 0x8a, 0xeb, 0xe9, 0x92, 0xea, 0x61, 0xf2, 0x8e, 0x19, 0xa1, 0xd3, 0x49, 0xc0, 0x84, 0x34, 0x1e, 0x2e, 0x6e, 0xf6, 0x98, 0xe2, 0x87, 0x53, 0xd6, 0x55, 0xd9, 0x1a, 0x8a, 0x92, 0x5c, 0xad, 0xdc, 0x1e, 0x1c, 0x30, 0xa7, 0x65, 0x9d, 0xc2, 0x4f, 0x60, 0xd2, 0x6f, 0xdb, 0xe0, 0x9f, 0x9e, 0xbc, 0x41, 0x16, 0x03, 0x00, 0x00, 0x04, 0x0e, 0x00, 0x00, 0x00 }; uint32_t shello_buf_len = sizeof(shello_buf); uint8_t client_change_cipher_spec_buf[] = { 0x16, 0x03, 0x00, 0x00, 0x84, 0x10, 0x00, 0x00, 0x80, 0x65, 0x51, 0x2d, 0xa6, 0xd4, 0xa7, 0x38, 0xdf, 0xac, 0x79, 0x1f, 0x0b, 0xd9, 0xb2, 0x61, 0x7d, 0x73, 0x88, 0x32, 0xd9, 0xf2, 0x62, 0x3a, 0x8b, 0x11, 0x04, 0x75, 0xca, 0x42, 0xff, 0x4e, 0xd9, 0xcc, 0xb9, 0xfa, 0x86, 0xf3, 0x16, 0x2f, 0x09, 0x73, 0x51, 0x66, 0xaa, 0x29, 0xcd, 0x80, 0x61, 0x0f, 0xe8, 0x13, 0xce, 0x5b, 0x8e, 0x0a, 0x23, 0xf8, 0x91, 0x5e, 0x5f, 0x54, 0x70, 0x80, 0x8e, 0x7b, 0x28, 0xef, 0xb6, 0x69, 0xb2, 0x59, 0x85, 0x74, 0x98, 0xe2, 0x7e, 0xd8, 0xcc, 0x76, 0x80, 0xe1, 0xb6, 0x45, 0x4d, 0xc7, 0xcd, 0x84, 0xce, 0xb4, 0x52, 0x79, 0x74, 0xcd, 0xe6, 0xd7, 0xd1, 0x9c, 0xad, 0xef, 0x63, 0x6c, 0x0f, 0xf7, 0x05, 0xe4, 0x4d, 0x1a, 0xd3, 0xcb, 0x9c, 0xd2, 0x51, 0xb5, 0x61, 0xcb, 0xff, 0x7c, 0xee, 0xc7, 0xbc, 0x5e, 0x15, 0xa3, 0xf2, 0x52, 0x0f, 0xbb, 0x32, 0x14, 0x03, 0x00, 0x00, 0x01, 0x01, 0x16, 0x03, 0x00, 0x00, 0x40, 0xa9, 0xd8, 0xd7, 0x35, 0xbc, 0x39, 0x56, 0x98, 0xad, 0x87, 0x61, 0x2a, 0xc4, 0x8f, 0xcc, 0x03, 0xcb, 0x93, 0x80, 0x81, 0xb0, 0x4a, 0xc4, 0xd2, 0x09, 0x71, 0x3e, 0x90, 0x3c, 0x8d, 0xe0, 0x95, 0x44, 0xfe, 0x56, 0xd1, 0x7e, 0x88, 0xe2, 0x48, 0xfd, 0x76, 0x70, 0x76, 0xe2, 0xcd, 0x06, 0xd0, 0xf3, 0x9d, 0x13, 0x79, 0x67, 0x1e, 0x37, 0xf6, 0x98, 0xbe, 0x59, 0x18, 0x4c, 0xfc, 0x75, 0x56 }; uint32_t client_change_cipher_spec_buf_len = sizeof(client_change_cipher_spec_buf); uint8_t server_change_cipher_spec_buf[] = { 0x14, 0x03, 0x00, 0x00, 0x01, 0x01, 0x16, 0x03, 0x00, 0x00, 0x40, 0xce, 0x7c, 0x92, 0x43, 0x59, 0xcc, 0x3d, 0x90, 0x91, 0x9c, 0x58, 0xf0, 0x7a, 0xce, 0xae, 0x0d, 0x08, 0xe0, 0x76, 0xb4, 0x86, 0xb1, 0x15, 0x5b, 0x32, 0xb8, 0x77, 0x53, 0xe7, 0xa6, 0xf9, 0xd0, 0x95, 0x5f, 0xaa, 0x07, 0xc3, 0x96, 0x7c, 0xc9, 0x88, 0xc2, 0x7a, 0x20, 0x89, 0x4f, 0xeb, 0xeb, 0xb6, 0x19, 0xef, 0xaa, 0x27, 0x73, 0x9d, 0xa6, 0xb4, 0x9f, 0xeb, 0x34, 0xe2, 0x4d, 0x9f, 0x6b }; uint32_t server_change_cipher_spec_buf_len = sizeof(server_change_cipher_spec_buf); uint8_t toserver_app_data_buf[] = { 0x17, 0x03, 0x00, 0x01, 0xb0, 0x4a, 0xc3, 0x3e, 0x9d, 0x77, 0x78, 0x01, 0x2c, 0xb4, 0xbc, 0x4c, 0x9a, 0x84, 0xd7, 0xb9, 0x90, 0x0c, 0x21, 0x10, 0xf0, 0xfa, 0x00, 0x7c, 0x16, 0xbb, 0x77, 0xfb, 0x72, 0x42, 0x4f, 0xad, 0x50, 0x4a, 0xd0, 0xaa, 0x6f, 0xaa, 0x44, 0x6c, 0x62, 0x94, 0x1b, 0xc5, 0xfe, 0xe9, 0x1c, 0x5e, 0xde, 0x85, 0x0b, 0x0e, 0x05, 0xe4, 0x18, 0x6e, 0xd2, 0xd3, 0xb5, 0x20, 0xab, 0x81, 0xfd, 0x18, 0x9a, 0x73, 0xb8, 0xd7, 0xef, 0xc3, 0xdd, 0x74, 0xd7, 0x9c, 0x1e, 0x6f, 0x21, 0x6d, 0xf8, 0x24, 0xca, 0x3c, 0x70, 0x78, 0x36, 0x12, 0x7a, 0x8a, 0x9c, 0xac, 0x4e, 0x1c, 0xa8, 0xfb, 0x27, 0x30, 0xba, 0x9a, 0xf4, 0x2f, 0x0a, 0xab, 0x80, 0x6a, 0xa1, 0x60, 0x74, 0xf0, 0xe3, 0x91, 0x84, 0xe7, 0x90, 0x88, 0xcc, 0xf0, 0x95, 0x7b, 0x0a, 0x22, 0xf2, 0xf9, 0x27, 0xe0, 0xdd, 0x38, 0x0c, 0xfd, 0xe9, 0x03, 0x71, 0xdc, 0x70, 0xa4, 0x6e, 0xdf, 0xe3, 0x72, 0x9e, 0xa1, 0xf0, 0xc9, 0x00, 0xd6, 0x03, 0x55, 0x6a, 0x67, 0x5d, 0x9c, 0xb8, 0x75, 0x01, 0xb0, 0x01, 0x9f, 0xe6, 0xd2, 0x44, 0x18, 0xbc, 0xca, 0x7a, 0x10, 0x39, 0xa6, 0xcf, 0x15, 0xc7, 0xf5, 0x35, 0xd4, 0xb3, 0x6d, 0x91, 0x23, 0x84, 0x99, 0xba, 0xb0, 0x7e, 0xd0, 0xc9, 0x4c, 0xbf, 0x3f, 0x33, 0x68, 0x37, 0xb7, 0x7d, 0x44, 0xb0, 0x0b, 0x2c, 0x0f, 0xd0, 0x75, 0xa2, 0x6b, 0x5b, 0xe1, 0x9f, 0xd4, 0x69, 0x9a, 0x14, 0xc8, 0x29, 0xb7, 0xd9, 0x10, 0xbb, 0x99, 0x30, 0x9a, 0xfb, 0xcc, 0x13, 0x1f, 0x76, 0x4e, 0xe6, 0xdf, 0x14, 0xaa, 0xd5, 0x60, 0xbf, 0x91, 0x49, 0x0d, 0x64, 0x42, 0x29, 0xa8, 0x64, 0x27, 0xd4, 0x5e, 0x1b, 0x18, 0x03, 0xa8, 0x73, 0xd6, 0x05, 0x6e, 0xf7, 0x50, 0xb0, 0x09, 0x6b, 0x69, 0x7a, 0x12, 0x28, 0x58, 0xef, 0x5a, 0x86, 0x11, 0xde, 0x71, 0x71, 0x9f, 0xca, 0xbd, 0x79, 0x2a, 0xc2, 0xe5, 0x9b, 0x5e, 0x32, 0xe7, 0xcb, 0x97, 0x6e, 0xa0, 0xea, 0xa4, 0xa4, 0x6a, 0x32, 0xf9, 0x37, 0x39, 0xd8, 0x37, 0x6d, 0x63, 0xf3, 0x08, 0x1c, 0xdd, 0x06, 0xdd, 0x2c, 0x2b, 0x9f, 0x04, 0x88, 0x5f, 0x36, 0x42, 0xc1, 0xb1, 0xc7, 0xe8, 0x2d, 0x5d, 0xa4, 0x6c, 0xe5, 0x60, 0x94, 0xae, 0xd0, 0x90, 0x1e, 0x88, 0xa0, 0x87, 0x52, 0xfb, 0xed, 0x97, 0xa5, 0x25, 0x5a, 0xb7, 0x55, 0xc5, 0x13, 0x07, 0x85, 0x27, 0x40, 0xed, 0xb8, 0xa0, 0x26, 0x13, 0x44, 0x0c, 0xfc, 0xcc, 0x5a, 0x09, 0xe5, 0x44, 0xb5, 0x63, 0xa1, 0x43, 0x51, 0x23, 0x4f, 0x17, 0x21, 0x89, 0x2e, 0x58, 0xfd, 0xf9, 0x63, 0x74, 0x04, 0x70, 0x1e, 0x7d, 0xd0, 0x66, 0xba, 0x40, 0x5e, 0x45, 0xdc, 0x39, 0x7c, 0x53, 0x0f, 0xa8, 0x38, 0xb2, 0x13, 0x99, 0x27, 0xd9, 0x4a, 0x51, 0xe9, 0x9f, 0x2a, 0x92, 0xbb, 0x9c, 0x90, 0xab, 0xfd, 0xf1, 0xb7, 0x40, 0x05, 0xa9, 0x7a, 0x20, 0x63, 0x36, 0xc1, 0xef, 0xb9, 0xad, 0xa2, 0xe0, 0x1d, 0x20, 0x4f, 0xb2, 0x34, 0xbd, 0xea, 0x07, 0xac, 0x21, 0xce, 0xf6, 0x8a, 0xa2, 0x9e, 0xcd, 0xfa }; uint32_t toserver_app_data_buf_len = sizeof(toserver_app_data_buf); Signature *s = NULL; ThreadVars th_v; Packet *p = NULL; Flow f; TcpSession ssn; DetectEngineThreadCtx *det_ctx = NULL; DetectEngineCtx *de_ctx = NULL; SSLState *ssl_state = NULL; int r = 0; AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc(); memset(&th_v, 0, sizeof(th_v)); memset(&p, 0, sizeof(p)); memset(&f, 0, sizeof(f)); memset(&ssn, 0, sizeof(ssn)); p = UTHBuildPacket(NULL, 0, IPPROTO_TCP); FLOW_INITIALIZE(&f); f.protoctx = (void *)&ssn; f.proto = IPPROTO_TCP; p->flow = &f; p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST; p->flowflags |= FLOW_PKT_TOSERVER; p->flowflags |= FLOW_PKT_ESTABLISHED; f.alproto = ALPROTO_TLS; StreamTcpInitConfig(TRUE); de_ctx = DetectEngineCtxInit(); FAIL_IF_NULL(de_ctx); de_ctx->flags |= DE_QUIET; s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any " "(msg:\"ssl state\"; ssl_state:client_hello; " "sid:1;)"); FAIL_IF_NULL(s); s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any " "(msg:\"ssl state\"; " "ssl_state:server_hello; " "sid:2;)"); FAIL_IF_NULL(s); s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any " "(msg:\"ssl state\"; " "ssl_state:client_keyx; " "sid:3;)"); FAIL_IF_NULL(s); s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any " "(msg:\"ssl state\"; " "ssl_state:server_keyx; " "sid:4;)"); FAIL_IF_NULL(s); s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any " "(msg:\"ssl state\"; " "ssl_state:!client_hello; " "sid:5;)"); FAIL_IF_NULL(s); SigGroupBuild(de_ctx); DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx); FLOWLOCK_WRLOCK(&f); r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_TLS, STREAM_TOSERVER | STREAM_START, chello_buf, chello_buf_len); FAIL_IF(r != 0); FLOWLOCK_UNLOCK(&f); ssl_state = f.alstate; FAIL_IF(ssl_state == NULL); /* do detect */ p->alerts.cnt = 0; SigMatchSignatures(&th_v, de_ctx, det_ctx, p); FAIL_IF(!PacketAlertCheck(p, 1)); FAIL_IF(PacketAlertCheck(p, 2)); FAIL_IF(PacketAlertCheck(p, 3)); FAIL_IF(PacketAlertCheck(p, 4)); FAIL_IF(PacketAlertCheck(p, 5)); FLOWLOCK_WRLOCK(&f); r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_TLS, STREAM_TOCLIENT, shello_buf, shello_buf_len); FAIL_IF(r != 0); FLOWLOCK_UNLOCK(&f); /* do detect */ p->alerts.cnt = 0; p->flowflags = (FLOW_PKT_TOCLIENT | FLOW_PKT_ESTABLISHED); SigMatchSignatures(&th_v, de_ctx, det_ctx, p); FAIL_IF(PacketAlertCheck(p, 1)); FAIL_IF(!PacketAlertCheck(p, 2)); FAIL_IF(PacketAlertCheck(p, 3)); FAIL_IF(PacketAlertCheck(p, 4)); FAIL_IF(!PacketAlertCheck(p, 5)); FLOWLOCK_WRLOCK(&f); r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_TLS, STREAM_TOSERVER, client_change_cipher_spec_buf, client_change_cipher_spec_buf_len); FAIL_IF(r != 0); FLOWLOCK_UNLOCK(&f); /* do detect */ p->alerts.cnt = 0; SigMatchSignatures(&th_v, de_ctx, det_ctx, p); FAIL_IF(PacketAlertCheck(p, 1)); FAIL_IF(PacketAlertCheck(p, 2)); FAIL_IF(!PacketAlertCheck(p, 3)); FAIL_IF(PacketAlertCheck(p, 4)); FLOWLOCK_WRLOCK(&f); r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_TLS, STREAM_TOCLIENT, server_change_cipher_spec_buf, server_change_cipher_spec_buf_len); FAIL_IF(r != 0); FLOWLOCK_UNLOCK(&f); /* do detect */ p->alerts.cnt = 0; SigMatchSignatures(&th_v, de_ctx, det_ctx, p); FAIL_IF(PacketAlertCheck(p, 1)); FAIL_IF(PacketAlertCheck(p, 2)); FAIL_IF(PacketAlertCheck(p, 3)); FAIL_IF(PacketAlertCheck(p, 4)); FLOWLOCK_WRLOCK(&f); r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_TLS, STREAM_TOSERVER, toserver_app_data_buf, toserver_app_data_buf_len); FAIL_IF(r != 0); FLOWLOCK_UNLOCK(&f); /* do detect */ p->alerts.cnt = 0; SigMatchSignatures(&th_v, de_ctx, det_ctx, p); FAIL_IF(PacketAlertCheck(p, 1)); FAIL_IF(PacketAlertCheck(p, 2)); FAIL_IF(PacketAlertCheck(p, 3)); FAIL_IF(PacketAlertCheck(p, 4)); if (alp_tctx != NULL) AppLayerParserThreadCtxFree(alp_tctx); SigGroupCleanup(de_ctx); SigCleanSignatures(de_ctx); DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx); DetectEngineCtxFree(de_ctx); StreamTcpFreeConfig(TRUE); FLOW_DESTROY(&f); UTHFreePackets(&p, 1); PASS; } /** * \brief Test that the "|" character still works as a separate for * compatibility with older Suricata rules. */ static int DetectSslStateTest08(void) { DetectSslStateData *ssd = DetectSslStateParse("server_hello|client_hello"); FAIL_IF_NULL(ssd); FAIL_IF_NOT(ssd->flags == (DETECT_SSL_STATE_SERVER_HELLO | DETECT_SSL_STATE_CLIENT_HELLO)); SCFree(ssd); PASS; } /** * \test Test parsing of negated states. */ static int DetectSslStateTestParseNegate(void) { DetectSslStateData *ssd = DetectSslStateParse("!client_hello"); FAIL_IF_NULL(ssd); uint32_t expected = DETECT_SSL_STATE_CLIENT_HELLO; FAIL_IF(ssd->flags != expected || ssd->mask != expected); SCFree(ssd); ssd = DetectSslStateParse("!client_hello,!server_hello"); FAIL_IF_NULL(ssd); expected = DETECT_SSL_STATE_CLIENT_HELLO | DETECT_SSL_STATE_SERVER_HELLO; FAIL_IF(ssd->flags != expected || ssd->mask != expected); SCFree(ssd); PASS; } #endif /* UNITTESTS */ static void DetectSslStateRegisterTests(void) { #ifdef UNITTESTS UtRegisterTest("DetectSslStateTest01", DetectSslStateTest01); UtRegisterTest("DetectSslStateTest02", DetectSslStateTest02); UtRegisterTest("DetectSslStateTest03", DetectSslStateTest03); UtRegisterTest("DetectSslStateTest04", DetectSslStateTest04); UtRegisterTest("DetectSslStateTest05", DetectSslStateTest05); UtRegisterTest("DetectSslStateTest06", DetectSslStateTest06); UtRegisterTest("DetectSslStateTest07", DetectSslStateTest07); UtRegisterTest("DetectSslStateTest08", DetectSslStateTest08); UtRegisterTest("DetectSslStateTestParseNegate", DetectSslStateTestParseNegate); #endif return; }