diff options
Diffstat (limited to 'framework/src/suricata/src/detect-filename.c')
-rw-r--r-- | framework/src/suricata/src/detect-filename.c | 321 |
1 files changed, 0 insertions, 321 deletions
diff --git a/framework/src/suricata/src/detect-filename.c b/framework/src/suricata/src/detect-filename.c deleted file mode 100644 index 8e5ddc1c..00000000 --- a/framework/src/suricata/src/detect-filename.c +++ /dev/null @@ -1,321 +0,0 @@ -/* Copyright (C) 2007-2014 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 Victor Julien <victor@inliniac.net> - * \author Pablo Rincon <pablo.rincon.crespo@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-engine-state.h" - -#include "flow.h" -#include "flow-var.h" -#include "flow-util.h" - -#include "util-debug.h" -#include "util-spm-bm.h" -#include "util-unittest.h" -#include "util-unittest-helper.h" - -#include "app-layer.h" - -#include "stream-tcp.h" - -#include "detect-filename.h" - -static int DetectFilenameMatch (ThreadVars *, DetectEngineThreadCtx *, Flow *, - uint8_t, File *, Signature *, SigMatch *); -static int DetectFilenameSetup (DetectEngineCtx *, Signature *, char *); -static void DetectFilenameRegisterTests(void); -static void DetectFilenameFree(void *); - -/** - * \brief Registration function for keyword: filename - */ -void DetectFilenameRegister(void) -{ - sigmatch_table[DETECT_FILENAME].name = "filename"; - sigmatch_table[DETECT_FILENAME].desc = "match on the file name"; - sigmatch_table[DETECT_FILENAME].url = "https://redmine.openinfosecfoundation.org/projects/suricata/wiki/File-keywords#filename"; - sigmatch_table[DETECT_FILENAME].FileMatch = DetectFilenameMatch; - sigmatch_table[DETECT_FILENAME].alproto = ALPROTO_HTTP; - sigmatch_table[DETECT_FILENAME].Setup = DetectFilenameSetup; - sigmatch_table[DETECT_FILENAME].Free = DetectFilenameFree; - sigmatch_table[DETECT_FILENAME].RegisterTests = DetectFilenameRegisterTests; - - SCLogDebug("registering filename rule option"); - return; -} - -/** - * \brief match the specified filename - * - * \param t thread local vars - * \param det_ctx pattern matcher thread local data - * \param f *LOCKED* flow - * \param flags direction flags - * \param file file being inspected - * \param s signature being inspected - * \param m sigmatch that we will cast into DetectFilenameData - * - * \retval 0 no match - * \retval 1 match - */ -static int DetectFilenameMatch (ThreadVars *t, DetectEngineThreadCtx *det_ctx, - Flow *f, uint8_t flags, File *file, Signature *s, SigMatch *m) -{ - SCEnter(); - int ret = 0; - - DetectFilenameData *filename = (DetectFilenameData *)m->ctx; - - if (file->name == NULL) - SCReturnInt(0); - - if (file->txid < det_ctx->tx_id) - SCReturnInt(0); - - if (file->txid > det_ctx->tx_id) - SCReturnInt(0); - - if (BoyerMooreNocase(filename->name, filename->len, file->name, - file->name_len, filename->bm_ctx) != NULL) - { -#ifdef DEBUG - if (SCLogDebugEnabled()) { - char *name = SCMalloc(filename->len + 1); - if (name != NULL) { - memcpy(name, filename->name, filename->len); - name[filename->len] = '\0'; - SCLogDebug("will look for filename %s", name); - } - } -#endif - - if (!(filename->flags & DETECT_CONTENT_NEGATED)) { - ret = 1; - } - } - - if (ret == 0 && (filename->flags & DETECT_CONTENT_NEGATED)) { - SCLogDebug("negated match"); - ret = 1; - } - - SCReturnInt(ret); -} - -/** - * \brief Parse the filename keyword - * - * \param idstr Pointer to the user provided option - * - * \retval filename pointer to DetectFilenameData on success - * \retval NULL on failure - */ -static DetectFilenameData *DetectFilenameParse (char *str) -{ - DetectFilenameData *filename = NULL; - - /* We have a correct filename option */ - filename = SCMalloc(sizeof(DetectFilenameData)); - if (unlikely(filename == NULL)) - goto error; - - memset(filename, 0x00, sizeof(DetectFilenameData)); - - if (DetectContentDataParse ("filename", str, &filename->name, &filename->len, &filename->flags) == -1) { - goto error; - } - - filename->bm_ctx = BoyerMooreNocaseCtxInit(filename->name, filename->len); - if (filename->bm_ctx == NULL) { - goto error; - } - - SCLogDebug("flags %02X", filename->flags); - if (filename->flags & DETECT_CONTENT_NEGATED) { - SCLogDebug("negated filename"); - } - -#ifdef DEBUG - if (SCLogDebugEnabled()) { - char *name = SCMalloc(filename->len + 1); - if (name != NULL) { - memcpy(name, filename->name, filename->len); - name[filename->len] = '\0'; - SCLogDebug("will look for filename %s", name); - } - } -#endif - - return filename; - -error: - if (filename != NULL) - DetectFilenameFree(filename); - return NULL; -} - -/** - * \brief this function is used to parse filename options - * \brief into the current signature - * - * \param de_ctx pointer to the Detection Engine Context - * \param s pointer to the Current Signature - * \param str pointer to the user provided "filename" option - * - * \retval 0 on Success - * \retval -1 on Failure - */ -static int DetectFilenameSetup (DetectEngineCtx *de_ctx, Signature *s, char *str) -{ - DetectFilenameData *filename = NULL; - SigMatch *sm = NULL; - - filename = DetectFilenameParse(str); - if (filename == NULL) - goto error; - - /* Okay so far so good, lets get this into a SigMatch - * and put it in the Signature. */ - sm = SigMatchAlloc(); - if (sm == NULL) - goto error; - - sm->type = DETECT_FILENAME; - sm->ctx = (void *)filename; - - SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_FILEMATCH); - - if (s->alproto != ALPROTO_HTTP && s->alproto != ALPROTO_SMTP) { - SCLogError(SC_ERR_CONFLICTING_RULE_KEYWORDS, "rule contains conflicting keywords."); - goto error; - } - - if (s->alproto == ALPROTO_HTTP) { - AppLayerHtpNeedFileInspection(); - } - - s->file_flags |= (FILE_SIG_NEED_FILE|FILE_SIG_NEED_FILENAME); - return 0; - -error: - if (filename != NULL) - DetectFilenameFree(filename); - if (sm != NULL) - SCFree(sm); - return -1; -} - -/** - * \brief this function will free memory associated with DetectFilenameData - * - * \param filename pointer to DetectFilenameData - */ -static void DetectFilenameFree(void *ptr) -{ - if (ptr != NULL) { - DetectFilenameData *filename = (DetectFilenameData *)ptr; - if (filename->bm_ctx != NULL) { - BoyerMooreCtxDeInit(filename->bm_ctx); - } - if (filename->name != NULL) - SCFree(filename->name); - SCFree(filename); - } -} - -#ifdef UNITTESTS /* UNITTESTS */ - -/** - * \test DetectFilenameTestParse01 - */ -int DetectFilenameTestParse01 (void) -{ - DetectFilenameData *dnd = DetectFilenameParse("\"secret.pdf\""); - if (dnd != NULL) { - DetectFilenameFree(dnd); - return 1; - } - return 0; -} - -/** - * \test DetectFilenameTestParse02 - */ -int DetectFilenameTestParse02 (void) -{ - int result = 0; - - DetectFilenameData *dnd = DetectFilenameParse("\"backup.tar.gz\""); - if (dnd != NULL) { - if (dnd->len == 13 && memcmp(dnd->name, "backup.tar.gz", 13) == 0) { - result = 1; - } - - DetectFilenameFree(dnd); - return result; - } - return 0; -} - -/** - * \test DetectFilenameTestParse03 - */ -int DetectFilenameTestParse03 (void) -{ - int result = 0; - - DetectFilenameData *dnd = DetectFilenameParse("\"cmd.exe\""); - if (dnd != NULL) { - if (dnd->len == 7 && memcmp(dnd->name, "cmd.exe", 7) == 0) { - result = 1; - } - - DetectFilenameFree(dnd); - return result; - } - return 0; -} - -#endif /* UNITTESTS */ - -/** - * \brief this function registers unit tests for DetectFilename - */ -void DetectFilenameRegisterTests(void) -{ -#ifdef UNITTESTS /* UNITTESTS */ - UtRegisterTest("DetectFilenameTestParse01", DetectFilenameTestParse01, 1); - UtRegisterTest("DetectFilenameTestParse02", DetectFilenameTestParse02, 1); - UtRegisterTest("DetectFilenameTestParse03", DetectFilenameTestParse03, 1); -#endif /* UNITTESTS */ -} |