diff options
Diffstat (limited to 'framework/src/suricata/src/detect-http-uri.c')
-rw-r--r-- | framework/src/suricata/src/detect-http-uri.c | 556 |
1 files changed, 556 insertions, 0 deletions
diff --git a/framework/src/suricata/src/detect-http-uri.c b/framework/src/suricata/src/detect-http-uri.c new file mode 100644 index 00000000..92c4803e --- /dev/null +++ b/framework/src/suricata/src/detect-http-uri.c @@ -0,0 +1,556 @@ +/* Copyright (C) 2007-2010 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. + */ + +/** + * \ingroup httplayer + * + * @{ + */ + + +/** + * \file + * + * \author Gerardo Iglesias <iglesiasg@gmail.com> + */ + +#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-content.h" +#include "detect-pcre.h" + +#include "flow.h" +#include "flow-var.h" + +#include "util-debug.h" +#include "util-unittest.h" +#include "util-spm.h" +#include "util-print.h" + +#include "app-layer.h" + +#include "app-layer-htp.h" +#include "detect-http-uri.h" +#include "detect-uricontent.h" +#include "stream-tcp.h" + +int DetectHttpUriSetup (DetectEngineCtx *, Signature *, char *); +void DetectHttpUriRegisterTests(void); + +/** + * \brief Registration function for keyword: http_uri + */ +void DetectHttpUriRegister (void) +{ + sigmatch_table[DETECT_AL_HTTP_URI].name = "http_uri"; + sigmatch_table[DETECT_AL_HTTP_URI].desc = "content modifier to match specifically and only on the HTTP uri-buffer"; + sigmatch_table[DETECT_AL_HTTP_URI].url = "https://redmine.openinfosecfoundation.org/projects/suricata/wiki/HTTP-keywords#http_uri-and-http_raw_uri"; + sigmatch_table[DETECT_AL_HTTP_URI].Match = NULL; + sigmatch_table[DETECT_AL_HTTP_URI].AppLayerMatch = NULL; + sigmatch_table[DETECT_AL_HTTP_URI].alproto = ALPROTO_HTTP; + sigmatch_table[DETECT_AL_HTTP_URI].Setup = DetectHttpUriSetup; + sigmatch_table[DETECT_AL_HTTP_URI].Free = NULL; + sigmatch_table[DETECT_AL_HTTP_URI].RegisterTests = DetectHttpUriRegisterTests; + + sigmatch_table[DETECT_AL_HTTP_URI].flags |= SIGMATCH_NOOPT; + sigmatch_table[DETECT_AL_HTTP_URI].flags |= SIGMATCH_PAYLOAD; +} + + +/** + * \brief this function setups the http_uri modifier keyword used in the rule + * + * \param de_ctx Pointer to the Detection Engine Context + * \param s Pointer to the Signature to which the current keyword belongs + * \param str Should hold an empty string always + * + * \retval 0 On success + * \retval -1 On failure + */ + +int DetectHttpUriSetup(DetectEngineCtx *de_ctx, Signature *s, char *str) +{ + return DetectEngineContentModifierBufferSetup(de_ctx, s, str, + DETECT_AL_HTTP_URI, + DETECT_SM_LIST_UMATCH, + ALPROTO_HTTP, + NULL); +} + + +/******************************** UNITESTS **********************************/ + +#ifdef UNITTESTS + +#include "stream-tcp-reassemble.h" + +/** + * \test Checks if a http_uri is registered in a Signature, if content is not + * specified in the signature + */ +int DetectHttpUriTest01(void) +{ + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any " + "(msg:\"Testing http_uri\"; http_uri;sid:1;)"); + if (de_ctx->sig_list == NULL) + result = 1; + +end: + if (de_ctx != NULL) + DetectEngineCtxFree(de_ctx); + return result; +} + +/** + * \test Checks if a http_uri is registered in a Signature, if some parameter + * is specified with http_uri in the signature + */ +int DetectHttpUriTest02(void) +{ + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any " + "(msg:\"Testing http_uri\"; content:\"one\"; " + "http_cookie:wrong; sid:1;)"); + if (de_ctx->sig_list == NULL) + result = 1; + +end: + if (de_ctx != NULL) + DetectEngineCtxFree(de_ctx); + return result; +} + +/** + * \test Checks if a http_uri is registered in a Signature + */ +int DetectHttpUriTest03(void) +{ + SigMatch *sm = NULL; + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any " + "(msg:\"Testing http_uri\"; content:\"one\"; " + "http_uri; content:\"two\"; http_uri; " + "content:\"three\"; http_uri; " + "sid:1;)"); + + if (de_ctx->sig_list == NULL) { + printf("sig parse failed: "); + goto end; + } + + sm = de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH]; + if (sm == NULL) { + printf("no sigmatch(es): "); + goto end; + } + + while (sm != NULL) { + if (sm->type == DETECT_CONTENT) { + result = 1; + } else { + printf("expected DETECT_AL_HTTP_URI, got %d: ", sm->type); + goto end; + } + sm = sm->next; + } + +end: + if (de_ctx != NULL) + DetectEngineCtxFree(de_ctx); + return result; +} + +/** + * \test Checks if a http_uri is registered in a Signature, when rawbytes is + * also specified in the signature + */ +int DetectHttpUriTest04(void) +{ + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any " + "(msg:\"Testing http_uri\"; content:\"one\"; " + "rawbytes; http_uri; sid:1;)"); + if (de_ctx->sig_list == NULL) + result = 1; + + end: + if (de_ctx != NULL) SigCleanSignatures(de_ctx); + if (de_ctx != NULL) DetectEngineCtxFree(de_ctx); + return result; +} + +/** + * \test Checks if a http_uri is successfully converted to a uricontent + * + */ +int DetectHttpUriTest05(void) +{ + DetectEngineCtx *de_ctx = NULL; + Signature *s = NULL; + int result = 0; + + if ((de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + s = SigInit(de_ctx, "alert tcp any any -> any any " + "(msg:\"Testing http_uri\"; " + "content:\"we are testing http_uri keyword\"; " + "http_uri; sid:1;)"); + if (s == NULL) { + printf("sig failed to parse\n"); + goto end; + } + if (s->sm_lists[DETECT_SM_LIST_UMATCH] == NULL) + goto end; + if (s->sm_lists[DETECT_SM_LIST_UMATCH]->type != DETECT_CONTENT) { + printf("wrong type\n"); + goto end; + } + + char *str = "we are testing http_uri keyword"; + int uricomp = memcmp((const char *)((DetectContentData*) s->sm_lists[DETECT_SM_LIST_UMATCH]->ctx)->content, str, strlen(str)-1); + int urilen = ((DetectContentData*) s->sm_lists_tail[DETECT_SM_LIST_UMATCH]->ctx)->content_len; + if (uricomp != 0 || + urilen != strlen("we are testing http_uri keyword")) { + printf("sig failed to parse, content not setup properly\n"); + goto end; + } + result = 1; + +end: + if (de_ctx != NULL) SigCleanSignatures(de_ctx); + if (de_ctx != NULL) SigGroupCleanup(de_ctx); + return result; +} + +int DetectHttpUriTest12(void) +{ + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any " + "(content:\"one\"; http_uri; " + "content:\"two\"; distance:0; http_uri; sid:1;)"); + if (de_ctx->sig_list == NULL) { + printf("de_ctx->sig_list == NULL\n"); + goto end; + } + + if (de_ctx->sig_list->sm_lists[DETECT_SM_LIST_PMATCH] != NULL) { + printf("de_ctx->sig_list->sm_lists[DETECT_SM_LIST_PMATCH] != NULL\n"); + goto end; + } + + if (de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH] == NULL) { + printf("de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH] == NULL\n"); + goto end; + } + + DetectContentData *ud1 = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_UMATCH]->prev->ctx; + DetectContentData *ud2 = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_UMATCH]->ctx; + if (ud1->flags != DETECT_CONTENT_RELATIVE_NEXT || + memcmp(ud1->content, "one", ud1->content_len) != 0 || + ud2->flags != DETECT_CONTENT_DISTANCE || + memcmp(ud2->content, "two", ud1->content_len) != 0) { + goto end; + } + + result = 1; + + end: + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + return result; +} + +int DetectHttpUriTest13(void) +{ + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any " + "(content:\"one\"; http_uri; " + "content:\"two\"; within:5; http_uri; sid:1;)"); + if (de_ctx->sig_list == NULL) { + printf("de_ctx->sig_list == NULL\n"); + goto end; + } + + if (de_ctx->sig_list->sm_lists[DETECT_SM_LIST_PMATCH] != NULL) { + printf("de_ctx->sig_list->sm_lists[DETECT_SM_LIST_PMATCH] != NULL\n"); + goto end; + } + + if (de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH] == NULL) { + printf("de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH] == NULL\n"); + goto end; + } + + DetectContentData *ud1 = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_UMATCH]->prev->ctx; + DetectContentData *ud2 = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_UMATCH]->ctx; + if (ud1->flags != DETECT_CONTENT_RELATIVE_NEXT || + memcmp(ud1->content, "one", ud1->content_len) != 0 || + ud2->flags != DETECT_CONTENT_WITHIN || + memcmp(ud2->content, "two", ud1->content_len) != 0) { + goto end; + } + + result = 1; + + end: + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + return result; +} + +int DetectHttpUriTest14(void) +{ + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any " + "(content:\"one\"; within:5; http_uri; sid:1;)"); + if (de_ctx->sig_list == NULL) { + printf("de_ctx->sig_list == NULL\n"); + goto end; + } + + result = 1; + + end: + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + return result; +} + +int DetectHttpUriTest15(void) +{ + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any " + "(content:\"one\"; http_uri; within:5; sid:1;)"); + if (de_ctx->sig_list == NULL) { + printf("de_ctx->sig_list == NULL\n"); + goto end; + } + + if (de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH] == NULL) { + printf("de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH] == NULL\n"); + goto end; + } + + DetectContentData *cd = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_UMATCH]->ctx; + if (memcmp(cd->content, "one", cd->content_len) != 0 || + cd->flags != DETECT_CONTENT_WITHIN) { + goto end; + } + + result = 1; + + end: + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + return result; +} + +int DetectHttpUriTest16(void) +{ + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any " + "(content:\"one\"; within:5; sid:1;)"); + if (de_ctx->sig_list == NULL) { + printf("de_ctx->sig_list == NULL\n"); + goto end; + } + + result = 1; + + end: + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + return result; +} + +int DetectHttpUriTest17(void) +{ + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any " + "(uricontent:\"one\"; " + "content:\"two\"; distance:0; http_uri; sid:1;)"); + if (de_ctx->sig_list == NULL) { + printf("de_ctx->sig_list == NULL\n"); + goto end; + } + + if (de_ctx->sig_list->sm_lists[DETECT_SM_LIST_PMATCH] != NULL) { + printf("de_ctx->sig_list->sm_lists[DETECT_SM_LIST_PMATCH] != NULL\n"); + goto end; + } + + if (de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH] == NULL) { + printf("de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH] == NULL\n"); + goto end; + } + + DetectContentData *ud1 = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_UMATCH]->prev->ctx; + DetectContentData *ud2 = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_UMATCH]->ctx; + if (ud1->flags != DETECT_CONTENT_RELATIVE_NEXT || + memcmp(ud1->content, "one", ud1->content_len) != 0 || + ud2->flags != DETECT_CONTENT_DISTANCE || + memcmp(ud2->content, "two", ud1->content_len) != 0) { + goto end; + } + + result = 1; + + end: + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + return result; +} + +int DetectHttpUriTest18(void) +{ + DetectEngineCtx *de_ctx = NULL; + int result = 0; + + if ( (de_ctx = DetectEngineCtxInit()) == NULL) + goto end; + + de_ctx->flags |= DE_QUIET; + de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any " + "(uricontent:\"one\"; " + "content:\"two\"; within:5; http_uri; sid:1;)"); + if (de_ctx->sig_list == NULL) { + printf("de_ctx->sig_list == NULL\n"); + goto end; + } + + if (de_ctx->sig_list->sm_lists[DETECT_SM_LIST_PMATCH] != NULL) { + printf("de_ctx->sig_list->sm_lists[DETECT_SM_LIST_PMATCH] != NULL\n"); + goto end; + } + + if (de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH] == NULL) { + printf("de_ctx->sig_list->sm_lists[DETECT_SM_LIST_UMATCH] == NULL\n"); + goto end; + } + + DetectContentData *ud1 = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_UMATCH]->prev->ctx; + DetectContentData *ud2 = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[DETECT_SM_LIST_UMATCH]->ctx; + if (ud1->flags != DETECT_CONTENT_RELATIVE_NEXT || + memcmp(ud1->content, "one", ud1->content_len) != 0 || + ud2->flags != DETECT_CONTENT_WITHIN || + memcmp(ud2->content, "two", ud1->content_len) != 0) { + goto end; + } + + result = 1; + + end: + SigCleanSignatures(de_ctx); + DetectEngineCtxFree(de_ctx); + return result; +} + +#endif /* UNITTESTS */ + +/** + * \brief Register the UNITTESTS for the http_uri keyword + */ +void DetectHttpUriRegisterTests (void) +{ +#ifdef UNITTESTS /* UNITTESTS */ + UtRegisterTest("DetectHttpUriTest01", DetectHttpUriTest01, 1); + UtRegisterTest("DetectHttpUriTest02", DetectHttpUriTest02, 1); + UtRegisterTest("DetectHttpUriTest03", DetectHttpUriTest03, 1); + UtRegisterTest("DetectHttpUriTest04", DetectHttpUriTest04, 1); + UtRegisterTest("DetectHttpUriTest05", DetectHttpUriTest05, 1); + UtRegisterTest("DetectHttpUriTest12", DetectHttpUriTest12, 1); + UtRegisterTest("DetectHttpUriTest13", DetectHttpUriTest13, 1); + UtRegisterTest("DetectHttpUriTest14", DetectHttpUriTest14, 1); + UtRegisterTest("DetectHttpUriTest15", DetectHttpUriTest15, 1); + UtRegisterTest("DetectHttpUriTest16", DetectHttpUriTest16, 1); + UtRegisterTest("DetectHttpUriTest17", DetectHttpUriTest17, 1); + UtRegisterTest("DetectHttpUriTest18", DetectHttpUriTest18, 1); +#endif /* UNITTESTS */ + +} +/** + * @} + */ |