mirror of https://github.com/OISF/suricata
detect/dcerpc: move iface keyword to rust
Ticket: 8391 Use same buffer dce_generic as for dcerpc.opnum (name dce_generic is enforced by a SV test currently)pull/15268/head
Philippe Antoine
3 months ago
committed by
Victor Julien
parent
d1481af94e
commit
4fc6ca5d6c
@ -1,168 +0,0 @@
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/* Copyright (C) 2007-2022 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 Anoop Saldanha <anoopsaldanha@gmail.com>
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*
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* Implements dce_iface 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-build.h"
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#include "detect-dce-iface.h"
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#include "flow.h"
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#include "flow-var.h"
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#include "flow-util.h"
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#include "app-layer.h"
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#include "queue.h"
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#include "stream-tcp-reassemble.h"
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#include "util-debug.h"
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#include "util-unittest.h"
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#include "util-unittest-helper.h"
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#include "stream-tcp.h"
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#include "rust.h"
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#define PARSE_REGEX "^\\s*([0-9a-zA-Z]{8}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{12})(?:\\s*,\\s*(<|>|=|!)([0-9]{1,5}))?(?:\\s*,\\s*(any_frag))?\\s*$"
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static DetectParseRegex parse_regex;
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static int DetectDceIfaceMatchRust(DetectEngineThreadCtx *det_ctx,
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Flow *f, uint8_t flags, void *state, void *txv,
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const Signature *s, const SigMatchCtx *m);
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static int DetectDceIfaceSetup(DetectEngineCtx *, Signature *, const char *);
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static void DetectDceIfaceFree(DetectEngineCtx *, void *);
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static int g_dce_generic_list_id = 0;
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/**
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* \brief Registers the keyword handlers for the "dce_iface" keyword.
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*/
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void DetectDceIfaceRegister(void)
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{
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sigmatch_table[DETECT_DCE_IFACE].name = "dcerpc.iface";
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sigmatch_table[DETECT_DCE_IFACE].alias = "dce_iface";
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sigmatch_table[DETECT_DCE_IFACE].AppLayerTxMatch = DetectDceIfaceMatchRust;
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sigmatch_table[DETECT_DCE_IFACE].Setup = DetectDceIfaceSetup;
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sigmatch_table[DETECT_DCE_IFACE].Free = DetectDceIfaceFree;
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sigmatch_table[DETECT_DCE_IFACE].desc =
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"match on the value of the interface UUID in a DCERPC header";
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sigmatch_table[DETECT_DCE_IFACE].url = "/rules/dcerpc-keywords.html#dcerpc-iface";
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DetectSetupParseRegexes(PARSE_REGEX, &parse_regex);
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g_dce_generic_list_id = DetectBufferTypeRegister("dce_generic");
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DetectAppLayerInspectEngineRegister("dce_generic", ALPROTO_DCERPC, SIG_FLAG_TOSERVER, 0,
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DetectEngineInspectGenericList, NULL);
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DetectAppLayerInspectEngineRegister(
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"dce_generic", ALPROTO_SMB, SIG_FLAG_TOSERVER, 0, DetectEngineInspectGenericList, NULL);
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DetectAppLayerInspectEngineRegister("dce_generic", ALPROTO_DCERPC, SIG_FLAG_TOCLIENT, 0,
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DetectEngineInspectGenericList, NULL);
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DetectAppLayerInspectEngineRegister(
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"dce_generic", ALPROTO_SMB, SIG_FLAG_TOCLIENT, 0, DetectEngineInspectGenericList, NULL);
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}
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/**
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* \brief App layer match function for the "dce_iface" 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 DetectDceIfaceMatchRust(DetectEngineThreadCtx *det_ctx,
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Flow *f, uint8_t flags, void *state, void *txv,
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const Signature *s, const SigMatchCtx *m)
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{
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SCEnter();
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if (f->alproto == ALPROTO_DCERPC) {
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// TODO check if state is NULL
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return SCDcerpcIfaceMatch(txv, state, (void *)m);
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}
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int ret = 0;
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if (SCSmbTxGetDceIface(f->alstate, txv, (void *)m) != 1) {
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SCLogDebug("SCSmbTxGetDceIface: didn't match");
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} else {
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SCLogDebug("SCSmbTxGetDceIface: matched!");
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ret = 1;
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// TODO validate frag
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}
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SCReturnInt(ret);
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}
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/**
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* \brief Creates a SigMatch for the "dce_iface" keyword being sent as argument,
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* and appends it to the 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 DetectDceIfaceSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
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{
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SCEnter();
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if (SCDetectSignatureSetAppProto(s, ALPROTO_DCERPC) < 0)
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return -1;
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void *did = SCDcerpcIfaceParse(arg);
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if (did == NULL) {
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SCLogError("Error parsing dce_iface option in "
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"signature");
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return -1;
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}
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if (SCSigMatchAppendSMToList(de_ctx, s, DETECT_DCE_IFACE, did, g_dce_generic_list_id) == NULL) {
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DetectDceIfaceFree(de_ctx, did);
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return -1;
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}
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return 0;
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}
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static void DetectDceIfaceFree(DetectEngineCtx *de_ctx, void *ptr)
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{
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SCEnter();
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if (ptr != NULL) {
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SCDcerpcIfaceFree(ptr);
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}
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SCReturn;
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}
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@ -1,23 +0,0 @@
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/* Copyright (C) 2007-2010 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_DCE_IFACE_H
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#define SURICATA_DETECT_DCE_IFACE_H
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void DetectDceIfaceRegister(void);
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#endif /* SURICATA_DETECT_DCE_IFACE_H */
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