diff options
Diffstat (limited to 'framework/src/suricata/src/detect-engine-file.c')
-rw-r--r-- | framework/src/suricata/src/detect-engine-file.c | 301 |
1 files changed, 0 insertions, 301 deletions
diff --git a/framework/src/suricata/src/detect-engine-file.c b/framework/src/suricata/src/detect-engine-file.c deleted file mode 100644 index 31993685..00000000 --- a/framework/src/suricata/src/detect-engine-file.c +++ /dev/null @@ -1,301 +0,0 @@ -/* Copyright (C) 2007-2011 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> - */ - -#include "suricata-common.h" - -#include "decode.h" - -#include "detect.h" -#include "detect-engine.h" -#include "detect-parse.h" -#include "detect-engine-state.h" - -#include "detect-filestore.h" - -#include "detect-engine-uri.h" -#include "detect-engine-hcbd.h" -#include "detect-engine-hhd.h" -#include "detect-engine-hrhd.h" -#include "detect-engine-hmd.h" -#include "detect-engine-hcd.h" -#include "detect-engine-hrud.h" -#include "detect-engine-dcepayload.h" - -#include "stream-tcp.h" -#include "stream-tcp-private.h" -#include "stream-tcp-reassemble.h" - -#include "app-layer-parser.h" -#include "app-layer-protos.h" -#include "app-layer-htp.h" -#include "app-layer-smb.h" -#include "app-layer-dcerpc-common.h" -#include "app-layer-dcerpc.h" -#include "app-layer-smtp.h" - -#include "util-unittest.h" -#include "util-unittest-helper.h" -#include "util-profiling.h" - - -/** - * \brief Inspect the file inspecting keywords. - * - * \param tv thread vars - * \param det_ctx detection engine thread ctx - * \param f flow - * \param s signature to inspect - * - * \retval 0 no match - * \retval 1 match - * \retval 2 can't match - * \retval 3 can't match filestore signature - * - * \note flow is not locked at this time - */ -static int DetectFileInspect(ThreadVars *tv, DetectEngineThreadCtx *det_ctx, - Flow *f, Signature *s, uint8_t flags, FileContainer *ffc) -{ - SigMatch *sm = NULL; - int r = 0; - int match = 0; - int store_r = 0; - - KEYWORD_PROFILING_SET_LIST(det_ctx, DETECT_SM_LIST_FILEMATCH); - SCLogDebug("file inspection... %p", ffc); - - if (ffc != NULL) { - File *file = ffc->head; - for (; file != NULL; file = file->next) { - SCLogDebug("file"); - - if (file->state == FILE_STATE_NONE) { - SCLogDebug("file state FILE_STATE_NONE"); - continue; - } - - if (file->txid < det_ctx->tx_id) { - SCLogDebug("file->txid < det_ctx->tx_id == %"PRIu64" < %"PRIu64, file->txid, det_ctx->tx_id); - continue; - } - - if (file->txid > det_ctx->tx_id) { - SCLogDebug("file->txid > det_ctx->tx_id == %"PRIu64" > %"PRIu64, file->txid, det_ctx->tx_id); - break; - } - - if ((s->file_flags & FILE_SIG_NEED_FILENAME) && file->name == NULL) { - SCLogDebug("sig needs filename, but we don't have any"); - r = 0; - break; - } - - if ((s->file_flags & FILE_SIG_NEED_MAGIC) && file->chunks_head == NULL) { - SCLogDebug("sig needs file content, but we don't have any"); - r = 0; - break; - } - - if ((s->file_flags & FILE_SIG_NEED_FILECONTENT) && file->chunks_head == NULL) { - SCLogDebug("sig needs file content, but we don't have any"); - r = 0; - break; - } - - if ((s->file_flags & FILE_SIG_NEED_MD5) && (!(file->flags & FILE_MD5))) { - SCLogDebug("sig needs file md5, but we don't have any"); - r = 0; - break; - } - - if ((s->file_flags & FILE_SIG_NEED_SIZE) && file->state < FILE_STATE_CLOSED) { - SCLogDebug("sig needs filesize, but state < FILE_STATE_CLOSED"); - r = 0; - break; - } - - /* run the file match functions. */ - for (sm = s->sm_lists[DETECT_SM_LIST_FILEMATCH]; sm != NULL; sm = sm->next) { - SCLogDebug("sm %p, sm->next %p", sm, sm->next); - - if (sigmatch_table[sm->type].FileMatch != NULL) { - KEYWORD_PROFILING_START; - match = sigmatch_table[sm->type]. - FileMatch(tv, det_ctx, f, flags, file, s, sm); - KEYWORD_PROFILING_END(det_ctx, sm->type, (match > 0)); - if (match == 0) { - r = 2; - break; - } else if (sm->next == NULL) { - r = 1; - break; - } - } - } - - /* continue inspection for other files as we may want to store - * those as well. We'll return 1 (match) regardless of their - * results though */ - if (r == 1) - store_r = 1; - - /* if this is a filestore sig, and the sig can't match - * return 3 so we can distinguish */ - if ((s->flags & SIG_FLAG_FILESTORE) && r == 2) - r = 3; - - /* continue, this file may (or may not) be unable to match - * maybe we have more that can :) */ - } - } else { - /* if we have a filestore sm with a scope > file (so tx, ssn) we - * run it here */ - sm = s->sm_lists[DETECT_SM_LIST_FILEMATCH]; - if (sm != NULL && sm->next == NULL && sm->type == DETECT_FILESTORE && - sm->ctx != NULL) - { - DetectFilestoreData *fd = (DetectFilestoreData *)sm->ctx; - if (fd->scope > FILESTORE_SCOPE_DEFAULT) { - KEYWORD_PROFILING_START; - match = sigmatch_table[sm->type]. - FileMatch(tv, det_ctx, f, flags, /* no file */NULL, s, sm); - KEYWORD_PROFILING_END(det_ctx, sm->type, (match > 0)); - - if (match == 1) { - r = 1; - } - } - } - } - - if (store_r == 1) - r = 1; - SCReturnInt(r); -} - -/** - * \brief Inspect the file inspecting keywords against the HTTP transactions. - * - * \param tv thread vars - * \param det_ctx detection engine thread ctx - * \param f flow - * \param s signature to inspect - * \param alstate state - * \param flags direction flag - * - * \retval 0 no match - * \retval 1 match - * \retval 2 can't match - * \retval 3 can't match filestore signature - * - * \note flow should be locked when this function's called. - */ -int DetectFileInspectHttp(ThreadVars *tv, - DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, - Signature *s, Flow *f, uint8_t flags, void *alstate, - void *tx, uint64_t tx_id) -{ - int r = DETECT_ENGINE_INSPECT_SIG_NO_MATCH; - FileContainer *ffc; - HtpState *htp_state = (HtpState *)alstate; - - if (flags & STREAM_TOCLIENT) - ffc = htp_state->files_tc; - else - ffc = htp_state->files_ts; - - int match = DetectFileInspect(tv, det_ctx, f, s, flags, ffc); - if (match == 1) { - r = DETECT_ENGINE_INSPECT_SIG_MATCH; - } else if (match == 2) { - if (r != 1) { - SCLogDebug("sid %u can't match on this transaction", s->id); - r = DETECT_ENGINE_INSPECT_SIG_CANT_MATCH; - } - } else if (match == 3) { - if (r != 1) { - SCLogDebug("sid %u can't match on this transaction (filestore sig)", s->id); - r = DETECT_ENGINE_INSPECT_SIG_CANT_MATCH_FILESTORE; - } - } - - return r; -} - -/** - * \brief Inspect the file inspecting keywords against the SMTP transactions. - * - * \param tv thread vars - * \param det_ctx detection engine thread ctx - * \param f flow - * \param s signature to inspect - * \param alstate state - * \param flags direction flag - * - * \retval 0 no match - * \retval 1 match - * \retval 2 can't match - * \retval 3 can't match filestore signature - * - * \note flow is not locked at this time - */ -int DetectFileInspectSmtp(ThreadVars *tv, - DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, - Signature *s, Flow *f, uint8_t flags, void *alstate, - void *tx, uint64_t tx_id) -{ - SCEnter(); - int r = DETECT_ENGINE_INSPECT_SIG_NO_MATCH; - SMTPState *smtp_state = NULL; - FileContainer *ffc; - - smtp_state = (SMTPState *)alstate; - if (smtp_state == NULL) { - SCLogDebug("no SMTP state"); - goto end; - } - - if (flags & STREAM_TOSERVER) - ffc = smtp_state->files_ts; - else - goto end; - - int match = DetectFileInspect(tv, det_ctx, f, s, flags, ffc); - if (match == 1) { - r = DETECT_ENGINE_INSPECT_SIG_MATCH; - } else if (match == 2) { - if (r != 1) { - SCLogDebug("sid %u can't match on this transaction", s->id); - r = DETECT_ENGINE_INSPECT_SIG_CANT_MATCH; - } - } else if (match == 3) { - if (r != 1) { - SCLogDebug("sid %u can't match on this transaction (filestore sig)", s->id); - r = DETECT_ENGINE_INSPECT_SIG_CANT_MATCH_FILESTORE; - } - } - - -end: - SCReturnInt(r); -} |