/* 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 * */ #include "detect-engine-build.h" #include "app-layer-parser.h" /** * \test Test that a signature containing tls_cert_fingerprint is correctly parsed * and that the keyword is registered. */ static int DetectTlsFingerprintTest01(void) { DetectEngineCtx *de_ctx = DetectEngineCtxInit(); FAIL_IF_NULL(de_ctx); de_ctx->flags |= DE_QUIET; Signature *s = DetectEngineAppendSig(de_ctx, "alert tls any any -> any any " "(msg:\"Testing tls.cert_fingerprint\"; " "tls.cert_fingerprint; " "content:\"11:22:33:44:55:66:77:88:99:00:11:22:33:44:55:66:77:88:99:00\"; " "sid:1;)"); FAIL_IF_NULL(s); /* sm should not be in the MATCH list */ SigMatch *sm = s->init_data->smlists[DETECT_SM_LIST_MATCH]; FAIL_IF_NOT_NULL(sm); sm = DetectBufferGetFirstSigMatch(s, g_tls_cert_fingerprint_buffer_id); FAIL_IF_NULL(sm); FAIL_IF(sm->type != DETECT_CONTENT); FAIL_IF_NOT_NULL(sm->next); SigGroupCleanup(de_ctx); DetectEngineCtxFree(de_ctx); PASS; } /** * \test Test matching for fingerprint of a certificate. */ static int DetectTlsFingerprintTest02(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, 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0x09, 0x33, 0x8b, 0x00, 0xf9, 0x83, 0xb3, 0xc6, 0xa4, 0x90, 0x49, 0x83, 0x2d, 0x36, 0xd9, 0x11, 0x78, 0xd0, 0x62, 0x9f, 0xc4, 0x8f, 0x84, 0xba, 0x7f, 0xaa, 0x04, 0xf1, 0xd9, 0xa4, 0xad, 0x5d, 0x63, 0xee, 0x72, 0xc6, 0x4d, 0xd1, 0x4b, 0x41, 0x8f, 0x40, 0x0f, 0x7d, 0xcd, 0xb8, 0x2e, 0x5b, 0x6e, 0x21, 0xc9, 0x3d }; 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.cert_fingerprint\"; " "tls.cert_fingerprint; " "content:\"4a:a3:66:76:82:cb:6b:23:bb:c3:58:47:23:a4:63:a7:78:a4:a1:18\"; " "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); SigGroupCleanup(de_ctx); DetectEngineCtxFree(de_ctx); StreamTcpFreeConfig(true); FLOW_DESTROY(&f); UTHFreePacket(p1); UTHFreePacket(p2); UTHFreePacket(p3); PASS; } static void DetectTlsFingerprintRegisterTests(void) { UtRegisterTest("DetectTlsFingerprintTest01", DetectTlsFingerprintTest01); UtRegisterTest("DetectTlsFingerprintTest02", DetectTlsFingerprintTest02); }