diff options
Diffstat (limited to 'framework/src/suricata/src/detect-fileext.c')
-rw-r--r-- | framework/src/suricata/src/detect-fileext.c | 315 |
1 files changed, 0 insertions, 315 deletions
diff --git a/framework/src/suricata/src/detect-fileext.c b/framework/src/suricata/src/detect-fileext.c deleted file mode 100644 index 7b5e9103..00000000 --- a/framework/src/suricata/src/detect-fileext.c +++ /dev/null @@ -1,315 +0,0 @@ -/* Copyright (C) 2007-2012 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-unittest.h" -#include "util-unittest-helper.h" -#include "util-spm-bm.h" -#include "util-print.h" -#include "util-memcmp.h" - -#include "app-layer.h" - -#include "stream-tcp.h" -#include "detect-fileext.h" - -static int DetectFileextMatch (ThreadVars *, DetectEngineThreadCtx *, Flow *, - uint8_t, File *, Signature *, SigMatch *); -static int DetectFileextSetup (DetectEngineCtx *, Signature *, char *); -static void DetectFileextRegisterTests(void); -static void DetectFileextFree(void *); - -/** - * \brief Registration function for keyword: fileext - */ -void DetectFileextRegister(void) -{ - sigmatch_table[DETECT_FILEEXT].name = "fileext"; - sigmatch_table[DETECT_FILEEXT].desc = "match on the extension of a file name"; - sigmatch_table[DETECT_FILEEXT].url = "https://redmine.openinfosecfoundation.org/projects/suricata/wiki/File-keywords#fileext"; - sigmatch_table[DETECT_FILEEXT].FileMatch = DetectFileextMatch; - sigmatch_table[DETECT_FILEEXT].alproto = ALPROTO_HTTP; - sigmatch_table[DETECT_FILEEXT].Setup = DetectFileextSetup; - sigmatch_table[DETECT_FILEEXT].Free = DetectFileextFree; - sigmatch_table[DETECT_FILEEXT].RegisterTests = DetectFileextRegisterTests; - - SCLogDebug("registering fileext rule option"); - return; -} - -/** - * \brief match the specified file extension - * - * \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 DetectFileextData - * - * \retval 0 no match - * \retval 1 match - */ -static int DetectFileextMatch (ThreadVars *t, DetectEngineThreadCtx *det_ctx, - Flow *f, uint8_t flags, File *file, Signature *s, SigMatch *m) -{ - SCEnter(); - int ret = 0; - - DetectFileextData *fileext = (DetectFileextData *)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 (file->name_len <= fileext->len) - SCReturnInt(0); - - int offset = file->name_len - fileext->len; - - /* fileext->ext is already in lowercase, as SCMemcmpLowercase requires */ - if (file->name[offset - 1] == '.' && - SCMemcmpLowercase(fileext->ext, file->name + offset, fileext->len) == 0) - { - if (!(fileext->flags & DETECT_CONTENT_NEGATED)) { - ret = 1; - SCLogDebug("File ext found"); - } - } - - if (ret == 0 && (fileext->flags & DETECT_CONTENT_NEGATED)) { - SCLogDebug("negated match"); - ret = 1; - } - - SCReturnInt(ret); -} - -/** - * \brief This function is used to parse fileet - * - * \param str Pointer to the fileext value string - * - * \retval pointer to DetectFileextData on success - * \retval NULL on failure - */ -static DetectFileextData *DetectFileextParse (char *str) -{ - DetectFileextData *fileext = NULL; - - /* We have a correct filename option */ - fileext = SCMalloc(sizeof(DetectFileextData)); - if (unlikely(fileext == NULL)) - goto error; - - memset(fileext, 0x00, sizeof(DetectFileextData)); - - if (DetectContentDataParse("fileext", str, &fileext->ext, &fileext->len, &fileext->flags) == -1) { - goto error; - } - uint16_t u; - for (u = 0; u < fileext->len; u++) - fileext->ext[u] = tolower(fileext->ext[u]); - - SCLogDebug("flags %02X", fileext->flags); - if (fileext->flags & DETECT_CONTENT_NEGATED) { - SCLogDebug("negated fileext"); - } - -#ifdef DEBUG - if (SCLogDebugEnabled()) { - char *ext = SCMalloc(fileext->len + 1); - if (ext != NULL) { - memcpy(ext, fileext->ext, fileext->len); - ext[fileext->len] = '\0'; - SCLogDebug("will look for fileext %s", ext); - } - } -#endif - - return fileext; - -error: - if (fileext != NULL) - DetectFileextFree(fileext); - return NULL; - -} - -/** - * \brief this function is used to add the parsed "id" option - * into the current signature - * - * \param de_ctx pointer to the Detection Engine Context - * \param s pointer to the Current Signature - * \param idstr pointer to the user provided "id" option - * - * \retval 0 on Success - * \retval -1 on Failure - */ -static int DetectFileextSetup (DetectEngineCtx *de_ctx, Signature *s, char *str) -{ - DetectFileextData *fileext= NULL; - SigMatch *sm = NULL; - - fileext = DetectFileextParse(str); - if (fileext == 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_FILEEXT; - sm->ctx = (void *)fileext; - - 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 (fileext != NULL) - DetectFileextFree(fileext); - if (sm != NULL) - SCFree(sm); - return -1; - -} - -/** - * \brief this function will free memory associated with DetectFileextData - * - * \param fileext pointer to DetectFileextData - */ -static void DetectFileextFree(void *ptr) -{ - if (ptr != NULL) { - DetectFileextData *fileext = (DetectFileextData *)ptr; - if (fileext->ext != NULL) - SCFree(fileext->ext); - SCFree(fileext); - } -} - -#ifdef UNITTESTS /* UNITTESTS */ - -/** - * \test DetectFileextTestParse01 - */ -int DetectFileextTestParse01 (void) -{ - DetectFileextData *dfd = DetectFileextParse("\"doc\""); - if (dfd != NULL) { - DetectFileextFree(dfd); - return 1; - } - return 0; -} - -/** - * \test DetectFileextTestParse02 - */ -int DetectFileextTestParse02 (void) -{ - int result = 0; - - DetectFileextData *dfd = DetectFileextParse("\"tar.gz\""); - if (dfd != NULL) { - if (dfd->len == 6 && memcmp(dfd->ext, "tar.gz", 6) == 0) { - result = 1; - } - - DetectFileextFree(dfd); - return result; - } - return 0; -} - -/** - * \test DetectFileextTestParse03 - */ -int DetectFileextTestParse03 (void) -{ - int result = 0; - - DetectFileextData *dfd = DetectFileextParse("\"pdf\""); - if (dfd != NULL) { - if (dfd->len == 3 && memcmp(dfd->ext, "pdf", 3) == 0) { - result = 1; - } - - DetectFileextFree(dfd); - return result; - } - return 0; -} - -#endif /* UNITTESTS */ - -/** - * \brief this function registers unit tests for DetectFileext - */ -void DetectFileextRegisterTests(void) -{ -#ifdef UNITTESTS /* UNITTESTS */ - UtRegisterTest("DetectFileextTestParse01", DetectFileextTestParse01, 1); - UtRegisterTest("DetectFileextTestParse02", DetectFileextTestParse02, 1); - UtRegisterTest("DetectFileextTestParse03", DetectFileextTestParse03, 1); -#endif /* UNITTESTS */ -} |