mirror of https://github.com/OISF/suricata
Philippe Antoine
5 months ago
committed by
Victor Julien
parent
df495d7e22
commit
536242341b
@ -1,154 +0,0 @@
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/* Copyright (C) 2022-2023 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* \file
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*
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* \author Eloy Pérez
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* \author Jason Taylor
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*
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* Implements the smb.version keyword
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*/
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#include "suricata-common.h"
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#include "detect.h"
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#include "detect-parse.h"
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#include "detect-engine.h"
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#include "detect-engine-mpm.h"
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#include "detect-engine-state.h"
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#include "detect-engine-prefilter.h"
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#include "detect-engine-content-inspection.h"
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#include "detect-smb-version.h"
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#include "rust.h"
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#define BUFFER_NAME "smb_version"
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#define KEYWORD_NAME "smb.version"
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static int g_smb_version_list_id = 0;
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static void DetectSmbVersionFree(DetectEngineCtx *de_ctx, void *ptr)
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{
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SCLogDebug("smb_version: DetectSmbVersionFree");
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SCSmbVersionFree(ptr);
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}
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/**
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* \brief Creates a SigMatch for the "smb.version" keyword being sent as argument,
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* and appends it to the SCSmbVersionMatch Signature(s).
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*
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* \param de_ctx Pointer to the detection engine context.
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* \param s Pointer to signature for the current Signature being parsed
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* from the rules.
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* \param arg Pointer to the string holding the keyword value.
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*
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* \retval 0 on success, -1 on failure
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*/
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static int DetectSmbVersionSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
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{
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SCLogDebug("smb_version: DetectSmbVersionSetup");
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if (SCDetectSignatureSetAppProto(s, ALPROTO_SMB) < 0)
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return -1;
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if (arg == NULL) {
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SCLogError("Error parsing smb.version option in signature, it needs a value");
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return -1;
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}
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if (SCDetectGetLastSMFromLists(s, DETECT_SMB_VERSION, -1)) {
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SCLogError("Can't use 2 or more smb.version declarations in "
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"the same sig. Invalidating signature.");
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return -1;
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}
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void *dod = SCSmbVersionParse(arg);
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if (dod == NULL) {
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SCLogError("Error parsing smb.version option in signature");
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return -1;
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}
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if (SCSigMatchAppendSMToList(
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de_ctx, s, DETECT_SMB_VERSION, (SigMatchCtx *)dod, g_smb_version_list_id) == NULL) {
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DetectSmbVersionFree(de_ctx, dod);
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return -1;
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}
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return 0;
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}
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/**
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* \brief App layer match function for the "smb.version" keyword.
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*
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* \param t Pointer to the ThreadVars instance.
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* \param det_ctx Pointer to the DetectEngineThreadCtx.
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* \param f Pointer to the flow.
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* \param flags Pointer to the flags indicating the flow direction.
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* \param state Pointer to the app layer state data.
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* \param s Pointer to the Signature instance.
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* \param m Pointer to the SigMatch.
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*
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* \retval 1 On Match.
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* \retval 0 On no match.
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*/
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static int DetectSmbVersionMatchRust(DetectEngineThreadCtx *det_ctx, Flow *f, uint8_t flags,
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void *state, void *txv, const Signature *s, const SigMatchCtx *m)
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{
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SCLogDebug("smb_version: DetectSmbVersionMatchRust");
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int matchvalue = SCSmbVersionMatch(txv, (void *)m);
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if (matchvalue != 1) {
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SCLogDebug("SCSmbVersionMatch: didn't match");
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SCReturnInt(0);
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} else {
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SCLogDebug("SCSmbVersionMatch: matched!");
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return matchvalue;
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}
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}
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/**
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* \brief Registers the keyword handlers for the "smb_version" keyword.
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*/
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void DetectSmbVersionRegister(void)
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{
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sigmatch_table[DETECT_SMB_VERSION].name = KEYWORD_NAME;
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sigmatch_table[DETECT_SMB_VERSION].Setup = DetectSmbVersionSetup;
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sigmatch_table[DETECT_SMB_VERSION].Match = NULL;
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sigmatch_table[DETECT_SMB_VERSION].AppLayerTxMatch = DetectSmbVersionMatchRust;
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sigmatch_table[DETECT_SMB_VERSION].Free = DetectSmbVersionFree;
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sigmatch_table[DETECT_SMB_VERSION].desc = "smb keyword to match on SMB version";
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sigmatch_table[DETECT_SMB_VERSION].url = "/rules/smb-keywords.html#smb-version";
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DetectAppLayerInspectEngineRegister(
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BUFFER_NAME, ALPROTO_SMB, SIG_FLAG_TOSERVER, 0, DetectEngineInspectGenericList, NULL);
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DetectAppLayerInspectEngineRegister(
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BUFFER_NAME, ALPROTO_SMB, SIG_FLAG_TOCLIENT, 0, DetectEngineInspectGenericList, NULL);
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g_smb_version_list_id = DetectBufferTypeRegister(BUFFER_NAME);
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SCLogDebug("registering " BUFFER_NAME " rule option");
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}
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@ -1,25 +0,0 @@
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/* Copyright (C) 2022-2023 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#ifndef SURICATA_DETECT_SMB_VERSION_H
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#define SURICATA_DETECT_SMB_VERSION_H
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/** \brief registers the keyword into the engine. Called from
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* detect.c::SigTableSetup() */
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void DetectSmbVersionRegister(void);
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#endif /* SURICATA_DETECT_SMB_VERSION_H */
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