diff options
Diffstat (limited to 'framework/src/suricata/src/detect-replace.c')
| -rw-r--r-- | framework/src/suricata/src/detect-replace.c | 845 |
1 files changed, 845 insertions, 0 deletions
diff --git a/framework/src/suricata/src/detect-replace.c b/framework/src/suricata/src/detect-replace.c new file mode 100644 index 00000000..57e06e7a --- /dev/null +++ b/framework/src/suricata/src/detect-replace.c @@ -0,0 +1,845 @@ +/* Copyright (C) 2011-2014 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 Eric Leblond <eric@regit.org> + * + * Replace part of the detection engine. + * + * If previous filter is of content type, replace can be used to change + * the matched part to a new value. + */ + +#include "suricata-common.h" + +#include "runmodes.h" + +extern int run_mode; + +#include "decode.h" + +#include "detect.h" +#include "detect-parse.h" +#include "detect-content.h" +#include "detect-uricontent.h" +#include "detect-byte-extract.h" +#include "detect-replace.h" +#include "app-layer.h" + +#include "detect-engine-mpm.h" +#include "detect-engine.h" +#include "detect-engine-state.h" + +#include "util-checksum.h" + +#include "util-unittest.h" +#include "util-unittest-helper.h" + +#include "flow-var.h" + +#include "util-debug.h" + +#include "pkt-var.h" +#include "host.h" +#include "util-profiling.h" + +static int DetectReplaceSetup(DetectEngineCtx *, Signature *, char *); +void DetectReplaceRegisterTests(void); + +void DetectReplaceRegister (void) +{ + sigmatch_table[DETECT_REPLACE].name = "replace"; + sigmatch_table[DETECT_REPLACE].Match = NULL; + sigmatch_table[DETECT_REPLACE].Setup = DetectReplaceSetup; + sigmatch_table[DETECT_REPLACE].Free = NULL; + sigmatch_table[DETECT_REPLACE].RegisterTests = DetectReplaceRegisterTests; + + sigmatch_table[DETECT_REPLACE].flags |= SIGMATCH_PAYLOAD; +} + +int DetectReplaceSetup(DetectEngineCtx *de_ctx, Signature *s, char *replacestr) +{ + uint8_t *content = NULL; + uint16_t len = 0; + uint32_t flags = 0; + SigMatch *pm = NULL; + DetectContentData *ud = NULL; + + int ret = DetectContentDataParse("replace", replacestr, &content, &len, &flags); + if (ret == -1) + goto error; + + if (flags & DETECT_CONTENT_NEGATED) { + SCLogError(SC_ERR_INVALID_VALUE, "Can't negate replacement string: %s", + replacestr); + goto error; + } + + switch (run_mode) { + case RUNMODE_NFQ: + case RUNMODE_IPFW: + break; + default: + SCLogWarning(SC_ERR_RUNMODE, + "Can't use 'replace' keyword in non IPS mode: %s", + s->sig_str); + /* this is a success, having the alert is interesting */ + return 0; + } + + /* add to the latest "content" keyword from either dmatch or pmatch */ + pm = SigMatchGetLastSMFromLists(s, 2, + DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_PMATCH]); + if (pm == NULL) { + SCLogError(SC_ERR_WITHIN_MISSING_CONTENT, "replace needs" + "preceding content option for raw sig"); + SCFree(content); + return -1; + } + + /* we can remove this switch now with the unified structure */ + ud = (DetectContentData *)pm->ctx; + if (ud == NULL) { + SCLogError(SC_ERR_INVALID_ARGUMENT, "invalid argument"); + SCFree(content); + return -1; + } + if (ud->flags & DETECT_CONTENT_NEGATED) { + SCLogError(SC_ERR_INVALID_SIGNATURE, "can't have a relative " + "negated keyword set along with a replacement"); + goto error; + } + if (ud->content_len != len) { + SCLogError(SC_ERR_INVALID_SIGNATURE, "can't have a content " + "length different from replace length"); + goto error; + } + + ud->replace = SCMalloc(len); + if (ud->replace == NULL) { + goto error; + } + memcpy(ud->replace, content, len); + ud->replace_len = len; + ud->flags |= DETECT_CONTENT_REPLACE; + /* want packet matching only won't be able to replace data with + * a flow. + */ + s->flags |= SIG_FLAG_REQUIRE_PACKET; + SCFree(content); + + return 0; + +error: + SCFree(content); + return -1; +} + +/* Add to the head of the replace-list. + * + * The first to add to the replace-list has the highest priority. So, + * adding the the head of the list results in the newest modifications + * of content being applied first, so later changes can over ride + * earlier changes. Thus the highest priority modifications should be + * applied last. + */ +DetectReplaceList *DetectReplaceAddToList(DetectReplaceList *replist, + uint8_t *found, + DetectContentData *cd) +{ + DetectReplaceList *newlist; + + if (cd->content_len != cd->replace_len) + return NULL; + SCLogDebug("replace: Adding match"); + + newlist = SCMalloc(sizeof(DetectReplaceList)); + if (unlikely(newlist == NULL)) + return replist; + newlist->found = found; + newlist->cd = cd; + /* Push new value onto the front of the list. */ + newlist->next = replist; + + return newlist; +} + + +void DetectReplaceExecuteInternal(Packet *p, DetectReplaceList *replist) +{ + DetectReplaceList *tlist = NULL; + + SCLogDebug("replace: Executing match"); + while (replist) { + memcpy(replist->found, replist->cd->replace, replist->cd->replace_len); + SCLogDebug("replace: injecting '%s'", replist->cd->replace); + p->flags |= PKT_STREAM_MODIFIED; + ReCalculateChecksum(p); + tlist = replist; + replist = replist->next; + SCFree(tlist); + } +} + + +void DetectReplaceFreeInternal(DetectReplaceList *replist) +{ + DetectReplaceList *tlist = NULL; + while (replist) { + SCLogDebug("replace: Freeing match"); + tlist = replist; + replist = replist->next; + SCFree(tlist); + } +} + +#ifdef UNITTESTS /* UNITTESTS */ + +/** + * \test Test packet Matches + * \param raw_eth_pkt pointer to the ethernet packet + * \param pktsize size of the packet + * \param sig pointer to the signature to test + * \param sid sid number of the signature + * \retval return 1 if match + * \retval return 0 if not + */ +static +int DetectReplaceLongPatternMatchTest(uint8_t *raw_eth_pkt, uint16_t pktsize, + char *sig, uint32_t sid, uint8_t *pp, + uint16_t *len) +{ + int result = 0; + + Packet *p = NULL; + p = PacketGetFromAlloc(); + if (unlikely(p == NULL)) + return 0; + + DecodeThreadVars dtv; + + ThreadVars th_v; + DetectEngineThreadCtx *det_ctx = NULL; + + if (pp == NULL) { + SCLogDebug("replace: looks like a second run"); + } + + PacketCopyData(p, raw_eth_pkt, pktsize); + memset(&dtv, 0, sizeof(DecodeThreadVars)); + memset(&th_v, 0, sizeof(th_v)); + dtv.app_tctx = AppLayerGetCtxThread(&th_v); + + FlowInitConfig(FLOW_QUIET); + DecodeEthernet(&th_v, &dtv, p, GET_PKT_DATA(p), pktsize, NULL); + + DetectEngineCtx *de_ctx = DetectEngineCtxInit(); + if (de_ctx == NULL) { + goto end; + } + de_ctx->flags |= DE_QUIET; + + de_ctx->sig_list = SigInit(de_ctx, sig); + if (de_ctx->sig_list == NULL) { + goto end; + } + de_ctx->sig_list->next = NULL; + + if (de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_PMATCH]->type == DETECT_CONTENT) { + DetectContentData *co = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_PMATCH]->ctx; + if (co->flags & DETECT_CONTENT_RELATIVE_NEXT) { + printf("relative next flag set on final match which is content: "); + goto end; + } + } + + SigGroupBuild(de_ctx); + DetectEngineAddToMaster(de_ctx); + DetectEngineThreadCtxInit(&th_v, NULL, (void *)&det_ctx); + + SigMatchSignatures(&th_v, de_ctx, det_ctx, p); + DetectEngineMoveToFreeList(de_ctx); + + if (PacketAlertCheck(p, sid) != 1) { + SCLogDebug("replace: no alert on sig %d", sid); + goto end; + } + + if (pp) { + memcpy(pp, GET_PKT_DATA(p), GET_PKT_LEN(p)); + *len = pktsize; + SCLogDebug("replace: copying %d on %p", *len, pp); + } + + + result = 1; +end: + if (dtv.app_tctx != NULL) + AppLayerDestroyCtxThread(dtv.app_tctx); + if (det_ctx != NULL) + DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx); + DetectEnginePruneFreeList(); + PACKET_RECYCLE(p); + FlowShutdown(); + SCFree(p); + + + return result; +} + + +/** + * \brief Wrapper for DetectContentLongPatternMatchTest + */ +int DetectReplaceLongPatternMatchTestWrp(char *sig, uint32_t sid, char *sig_rep, uint32_t sid_rep) +{ + int ret; + /** Real packet with the following tcp data: + * "Hi, this is a big test to check content matches of splitted" + * "patterns between multiple chunks!" + * (without quotes! :) ) + */ + uint8_t raw_eth_pkt[] = { + 0xff,0xff,0xff,0xff,0xff,0xff,0x00,0x00, + 0x00,0x00,0x00,0x00,0x08,0x00,0x45,0x00, + 0x00,0x85,0x00,0x01,0x00,0x00,0x40,0x06, + 0x7c,0x70,0x7f,0x00,0x00,0x01,0x7f,0x00, + 0x00,0x01,0x00,0x14,0x00,0x50,0x00,0x00, + 0x00,0x00,0x00,0x00,0x00,0x00,0x50,0x02, + 0x20,0x00,0xc9,0xad,0x00,0x00,0x48,0x69, + 0x2c,0x20,0x74,0x68,0x69,0x73,0x20,0x69, + 0x73,0x20,0x61,0x20,0x62,0x69,0x67,0x20, + 0x74,0x65,0x73,0x74,0x20,0x74,0x6f,0x20, + 0x63,0x68,0x65,0x63,0x6b,0x20,0x63,0x6f, + 0x6e,0x74,0x65,0x6e,0x74,0x20,0x6d,0x61, + 0x74,0x63,0x68,0x65,0x73,0x20,0x6f,0x66, + 0x20,0x73,0x70,0x6c,0x69,0x74,0x74,0x65, + 0x64,0x20,0x70,0x61,0x74,0x74,0x65,0x72, + 0x6e,0x73,0x20,0x62,0x65,0x74,0x77,0x65, + 0x65,0x6e,0x20,0x6d,0x75,0x6c,0x74,0x69, + 0x70,0x6c,0x65,0x20,0x63,0x68,0x75,0x6e, + 0x6b,0x73,0x21 }; /* end raw_eth_pkt */ + uint8_t p[sizeof(raw_eth_pkt)]; + uint16_t psize = sizeof(raw_eth_pkt); + + /* would be unittest */ + int run_mode_backup = run_mode; + run_mode = RUNMODE_NFQ; + ret = DetectReplaceLongPatternMatchTest(raw_eth_pkt, (uint16_t)sizeof(raw_eth_pkt), + sig, sid, p, &psize); + if (ret == 1) { + SCLogDebug("replace: test1 phase1"); + ret = DetectReplaceLongPatternMatchTest(p, psize, sig_rep, sid_rep, NULL, NULL); + } + run_mode = run_mode_backup; + return ret; +} + + +/** + * \brief Wrapper for DetectContentLongPatternMatchTest + */ +int DetectReplaceLongPatternMatchTestUDPWrp(char *sig, uint32_t sid, char *sig_rep, uint32_t sid_rep) +{ + int ret; + /** Real UDP DNS packet with a request A to a1.twimg.com + */ + uint8_t raw_eth_pkt[] = { + 0x8c, 0xa9, 0x82, 0x75, 0x5d, 0x62, 0xb4, 0x07, + 0xf9, 0xf3, 0xc7, 0x0a, 0x08, 0x00, 0x45, 0x00, + 0x00, 0x3a, 0x92, 0x4f, 0x40, 0x00, 0x40, 0x11, + 0x31, 0x1a, 0xc0, 0xa8, 0x00, 0x02, 0xc1, 0xbd, + 0xf4, 0xe1, 0x3b, 0x7e, 0x00, 0x35, 0x00, 0x26, + 0xcb, 0x81, 0x37, 0x62, 0x01, 0x00, 0x00, 0x01, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x61, + 0x31, 0x05, 0x74, 0x77, 0x69, 0x6d, 0x67, 0x03, + 0x63, 0x6f, 0x6d, 0x00, 0x00, 0x01, 0x00, 0x01 }; + + uint8_t p[sizeof(raw_eth_pkt)]; + uint16_t psize = sizeof(raw_eth_pkt); + + int run_mode_backup = run_mode; + run_mode = RUNMODE_NFQ; + ret = DetectReplaceLongPatternMatchTest(raw_eth_pkt, (uint16_t)sizeof(raw_eth_pkt), + sig, sid, p, &psize); + if (ret == 1) { + SCLogDebug("replace: test1 phase1 ok: %" PRIuMAX" vs %d",(uintmax_t)sizeof(raw_eth_pkt),psize); + ret = DetectReplaceLongPatternMatchTest(p, psize, sig_rep, sid_rep, NULL, NULL); + } + run_mode = run_mode_backup; + return ret; +} + +/** + * \test Check if replace is working + */ +static int DetectReplaceMatchTest01(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"big\"; replace:\"pig\"; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"this is a pig test\"; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working with offset + */ +static int DetectReplaceMatchTest02(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"th\"; offset: 4; replace:\"TH\"; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"THis\"; offset:4; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working with offset and keyword inversion + */ +static int DetectReplaceMatchTest03(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"th\"; replace:\"TH\"; offset: 4; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"THis\"; offset:4; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working with second content + */ +static int DetectReplaceMatchTest04(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"th\"; replace:\"TH\"; content:\"patter\"; replace:\"matter\"; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"THis\"; content:\"matterns\"; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is not done when second content don't match + */ +static int DetectReplaceMatchTest05(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"th\"; replace:\"TH\"; content:\"nutella\"; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"TH\"; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is not done when second content match and not + * first + */ +static int DetectReplaceMatchTest06(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"nutella\"; replace:\"commode\"; content:\"this is\"; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"commode\"; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working when nocase used + */ +static int DetectReplaceMatchTest07(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"BiG\"; nocase; replace:\"pig\"; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"this is a pig test\"; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working when depth is used + */ +static int DetectReplaceMatchTest08(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"big\"; depth:17; replace:\"pig\"; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"this is a pig test\"; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working when depth block match used + */ +static int DetectReplaceMatchTest09(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"big\"; depth:16; replace:\"pig\"; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"this is a pig test\"; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working when depth block match used + */ +static int DetectReplaceMatchTest10(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"big\"; depth:17; replace:\"pig\"; offset: 14; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"pig\"; depth:17; offset:14; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working with within + */ +static int DetectReplaceMatchTest11(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"big\"; replace:\"pig\"; content:\"to\"; within: 11; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"pig\"; depth:17; offset:14; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working with within + */ +static int DetectReplaceMatchTest12(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"big\"; replace:\"pig\"; content:\"to\"; within: 4; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"pig\"; depth:17; offset:14; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working with within + */ +static int DetectReplaceMatchTest13(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"big\"; replace:\"pig\"; content:\"test\"; distance: 1; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"pig\"; depth:17; offset:14; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working with within + */ +static int DetectReplaceMatchTest14(void) +{ + char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";" + " content:\"big\"; replace:\"pig\"; content:\"test\"; distance: 2; sid:1;)"; + char *sig_rep = "alert tcp any any -> any any (msg:\"replace worked\";" + " content:\"pig\"; depth:17; offset:14; sid:2;)"; + return DetectReplaceLongPatternMatchTestWrp(sig, 1, sig_rep, 2); +} + +/** + * \test Check if replace is working with within + */ +static int DetectReplaceMatchTest15(void) +{ + char *sig = "alert udp any any -> any any (msg:\"Nothing..\";" + " content:\"com\"; replace:\"org\"; sid:1;)"; + char *sig_rep = "alert udp any any -> any any (msg:\"replace worked\";" + " content:\"twimg|03|org\"; sid:2;)"; + return DetectReplaceLongPatternMatchTestUDPWrp(sig, 1, sig_rep, 2); +} + + +/** + * \test Parsing test + */ +static int DetectReplaceParseTest01(void) +{ + int run_mode_backup = run_mode; + run_mode = RUNMODE_NFQ; + + DetectEngineCtx *de_ctx = NULL; + int result = 1; + + de_ctx = DetectEngineCtxInit(); + if (de_ctx == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, + "alert udp any any -> any any " + "(msg:\"test\"; content:\"doh\"; replace:\"; sid:238012;)"); + if (de_ctx->sig_list != NULL) { + result = 0; + goto end; + } + + end: + run_mode = run_mode_backup; + + SigGroupCleanup(de_ctx); + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + + return result; +} + +/** + * \test Parsing test: non valid because of http protocol + */ +static int DetectReplaceParseTest02(void) +{ + int run_mode_backup = run_mode; + run_mode = RUNMODE_NFQ; + + DetectEngineCtx *de_ctx = NULL; + int result = 1; + + de_ctx = DetectEngineCtxInit(); + if (de_ctx == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, + "alert http any any -> any any " + "(msg:\"test\"; content:\"doh\"; replace:\"bon\"; sid:238012;)"); + if (de_ctx->sig_list == NULL) { + result = 0; + goto end; + } + + end: + run_mode = run_mode_backup; + + SigGroupCleanup(de_ctx); + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + + return result; +} + +/** + * \test Parsing test: non valid because of http_header on same content + * as replace keyword + */ +static int DetectReplaceParseTest03(void) +{ + int run_mode_backup = run_mode; + run_mode = RUNMODE_NFQ; + + DetectEngineCtx *de_ctx = NULL; + int result = 1; + + de_ctx = DetectEngineCtxInit(); + if (de_ctx == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, + "alert tcp any any -> any any " + "(msg:\"test\"; content:\"doh\"; replace:\"don\"; http_header; sid:238012;)"); + if (de_ctx->sig_list != NULL) { + result = 0; + goto end; + } + + end: + run_mode = run_mode_backup; + + SigGroupCleanup(de_ctx); + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + + return result; +} + +/** + * \test Parsing test no content + */ +static int DetectReplaceParseTest04(void) +{ + int run_mode_backup = run_mode; + run_mode = RUNMODE_NFQ; + + DetectEngineCtx *de_ctx = NULL; + int result = 1; + + de_ctx = DetectEngineCtxInit(); + if (de_ctx == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, + "alert tcp any any -> any any " + "(msg:\"test\"; replace:\"don\"; sid:238012;)"); + if (de_ctx->sig_list != NULL) { + result = 0; + goto end; + } + + end: + run_mode = run_mode_backup; + + SigGroupCleanup(de_ctx); + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + + return result; +} + +/** + * \test Parsing test content after replace + */ +static int DetectReplaceParseTest05(void) +{ + int run_mode_backup = run_mode; + run_mode = RUNMODE_NFQ; + + DetectEngineCtx *de_ctx = NULL; + int result = 1; + + de_ctx = DetectEngineCtxInit(); + if (de_ctx == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, + "alert tcp any any -> any any " + "(msg:\"test\"; replace:\"don\"; content:\"doh\"; sid:238012;)"); + if (de_ctx->sig_list != NULL) { + result = 0; + goto end; + } + + end: + run_mode = run_mode_backup; + + SigGroupCleanup(de_ctx); + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + + return result; +} + +/** + * \test Parsing test content and replace length differ + */ +static int DetectReplaceParseTest06(void) +{ + int run_mode_backup = run_mode; + run_mode = RUNMODE_NFQ; + + DetectEngineCtx *de_ctx = NULL; + int result = 1; + + de_ctx = DetectEngineCtxInit(); + if (de_ctx == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, + "alert tcp any any -> any any " + "(msg:\"test\"; content:\"don\"; replace:\"donut\"; sid:238012;)"); + if (de_ctx->sig_list != NULL) { + result = 0; + goto end; + } + + end: + run_mode = run_mode_backup; + + SigGroupCleanup(de_ctx); + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + + return result; +} + +/** + * \test Parsing test content and replace length differ + */ +static int DetectReplaceParseTest07(void) +{ + int run_mode_backup = run_mode; + run_mode = RUNMODE_NFQ; + + DetectEngineCtx *de_ctx = NULL; + int result = 1; + + de_ctx = DetectEngineCtxInit(); + if (de_ctx == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, + "alert tcp any any -> any any " + "(msg:\"test\"; content:\"don\"; replace:\"dou\"; content:\"jpg\"; http_header; sid:238012;)"); + if (de_ctx->sig_list != NULL) { + result = 0; + goto end; + } + + end: + run_mode = run_mode_backup; + + SigGroupCleanup(de_ctx); + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + + return result; +} + + + +#endif /* UNITTESTS */ + +/** + * \brief this function registers unit tests for DetectContent + */ +void DetectReplaceRegisterTests(void) +{ +#ifdef UNITTESTS /* UNITTESTS */ +/* matching */ + UtRegisterTest("DetectReplaceMatchTest01", DetectReplaceMatchTest01, 1); + UtRegisterTest("DetectReplaceMatchTest02", DetectReplaceMatchTest02, 1); + UtRegisterTest("DetectReplaceMatchTest03", DetectReplaceMatchTest03, 1); + UtRegisterTest("DetectReplaceMatchTest04", DetectReplaceMatchTest04, 1); + UtRegisterTest("DetectReplaceMatchTest05", DetectReplaceMatchTest05, 0); + UtRegisterTest("DetectReplaceMatchTest06", DetectReplaceMatchTest06, 0); + UtRegisterTest("DetectReplaceMatchTest07", DetectReplaceMatchTest07, 1); + UtRegisterTest("DetectReplaceMatchTest08", DetectReplaceMatchTest08, 1); + UtRegisterTest("DetectReplaceMatchTest09", DetectReplaceMatchTest09, 0); + UtRegisterTest("DetectReplaceMatchTest10", DetectReplaceMatchTest10, 1); + UtRegisterTest("DetectReplaceMatchTest11", DetectReplaceMatchTest11, 1); + UtRegisterTest("DetectReplaceMatchTest12", DetectReplaceMatchTest12, 0); + UtRegisterTest("DetectReplaceMatchTest13", DetectReplaceMatchTest13, 1); + UtRegisterTest("DetectReplaceMatchTest14", DetectReplaceMatchTest14, 0); + UtRegisterTest("DetectReplaceMatchTest15", DetectReplaceMatchTest15, 1); +/* parsing */ + UtRegisterTest("DetectReplaceParseTest01", DetectReplaceParseTest01, 1); + UtRegisterTest("DetectReplaceParseTest02", DetectReplaceParseTest02, 1); + UtRegisterTest("DetectReplaceParseTest03", DetectReplaceParseTest03, 1); + UtRegisterTest("DetectReplaceParseTest04", DetectReplaceParseTest04, 1); + UtRegisterTest("DetectReplaceParseTest05", DetectReplaceParseTest05, 1); + UtRegisterTest("DetectReplaceParseTest06", DetectReplaceParseTest06, 1); + UtRegisterTest("DetectReplaceParseTest07", DetectReplaceParseTest07, 1); +#endif /* UNITTESTS */ +} |