mirror of https://github.com/OISF/suricata
detect/ike: move ike.key_exchange_payload_length keyword to rust
Ticket: 8310pull/14856/head
Philippe Antoine
2 months ago
committed by
Victor Julien
parent
841fe44f34
commit
e85bf5be4d
@ -1,146 +0,0 @@
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/* Copyright (C) 2020 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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*
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* \author Frank Honza <frank.honza@dcso.de>
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*/
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#include "suricata-common.h"
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#include "conf.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-content-inspection.h"
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#include "detect-ike-key-exchange-payload-length.h"
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#include "app-layer-parser.h"
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#include "util-byte.h"
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#include "detect-engine-uint.h"
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#include "rust-bindings.h"
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/**
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* [ike.key_exchange_payload_length]:[=|<|>|<=|>=]<length>;
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*/
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static int DetectIkeKeyExchangePayloadLengthSetup(DetectEngineCtx *, Signature *s, const char *str);
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static void DetectIkeKeyExchangePayloadLengthFree(DetectEngineCtx *, void *);
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static int g_ike_key_exch_payload_length_buffer_id = 0;
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static int DetectIkeKeyExchangePayloadLengthMatch(DetectEngineThreadCtx *, Flow *, uint8_t, void *,
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void *, const Signature *, const SigMatchCtx *);
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/**
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* \brief Registration function for ike.key_exchange_payload_length keyword.
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*/
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void DetectIkeKeyExchangePayloadLengthRegister(void)
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{
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sigmatch_table[DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH].name = "ike.key_exchange_payload_length";
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sigmatch_table[DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH].desc =
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"match IKE key exchange payload length";
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sigmatch_table[DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH].url =
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"/rules/ike-keywords.html#ike-key-exchange-payload-length";
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sigmatch_table[DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH].AppLayerTxMatch =
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DetectIkeKeyExchangePayloadLengthMatch;
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sigmatch_table[DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH].Setup =
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DetectIkeKeyExchangePayloadLengthSetup;
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sigmatch_table[DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH].Free =
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DetectIkeKeyExchangePayloadLengthFree;
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sigmatch_table[DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH].flags = SIGMATCH_INFO_UINT32;
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DetectAppLayerInspectEngineRegister("ike.key_exchange_payload_length", ALPROTO_IKE,
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SIG_FLAG_TOSERVER, 1, DetectEngineInspectGenericList, NULL);
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DetectAppLayerInspectEngineRegister("ike.key_exchange_payload_length", ALPROTO_IKE,
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SIG_FLAG_TOCLIENT, 1, DetectEngineInspectGenericList, NULL);
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g_ike_key_exch_payload_length_buffer_id =
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DetectBufferTypeGetByName("ike.key_exchange_payload_length");
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}
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/**
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* \internal
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* \brief Function to match key exchange payload length of a IKE state
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*
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* \param det_ctx Pointer to the pattern matcher thread.
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* \param f Pointer to the current flow.
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* \param flags Flags.
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* \param state App layer state.
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* \param txv Pointer to the Ike Transaction.
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* \param s Pointer to the Signature.
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* \param ctx Pointer to the sigmatch that we will cast into DetectU32Data.
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*
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* \retval 0 no match.
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* \retval 1 match.
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*/
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static int DetectIkeKeyExchangePayloadLengthMatch(DetectEngineThreadCtx *det_ctx, Flow *f,
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uint8_t flags, void *state, void *txv, const Signature *s, const SigMatchCtx *ctx)
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{
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SCEnter();
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uint32_t length;
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if (!SCIkeStateGetKeyExchangePayloadLength(txv, &length))
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SCReturnInt(0);
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const DetectU32Data *du32 = (const DetectU32Data *)ctx;
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return DetectU32Match(length, du32);
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}
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/**
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* \brief Function to add the parsed IKE key exchange payload length query into the current
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* signature.
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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 the Current Signature.
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* \param rawstr Pointer to the user provided flags options.
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*
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* \retval 0 on Success.
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* \retval -1 on Failure.
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*/
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static int DetectIkeKeyExchangePayloadLengthSetup(
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DetectEngineCtx *de_ctx, Signature *s, const char *rawstr)
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{
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if (SCDetectSignatureSetAppProto(s, ALPROTO_IKE) != 0)
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return -1;
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DetectU32Data *key_exchange_payload_length = DetectU32Parse(rawstr);
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if (key_exchange_payload_length == NULL)
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return -1;
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/* okay so far so good, lets get this into a SigMatch
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* and put it in the Signature. */
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if (SCSigMatchAppendSMToList(de_ctx, s, DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH,
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(SigMatchCtx *)key_exchange_payload_length,
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g_ike_key_exch_payload_length_buffer_id) == NULL) {
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goto error;
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}
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return 0;
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error:
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DetectIkeKeyExchangePayloadLengthFree(de_ctx, key_exchange_payload_length);
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return -1;
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}
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/**
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* \internal
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* \brief Function to free memory associated with DetectU32Data.
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*
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* \param de_ptr Pointer to DetectU32Data.
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*/
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static void DetectIkeKeyExchangePayloadLengthFree(DetectEngineCtx *de_ctx, void *ptr)
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{
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SCDetectU32Free(ptr);
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}
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@ -1,28 +0,0 @@
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/* Copyright (C) 2020 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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*
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* \author Frank Honza <frank.honza@dcso.de>
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*/
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#ifndef SURICATA_DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH_H
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#define SURICATA_DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH_H
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void DetectIkeKeyExchangePayloadLengthRegister(void);
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#endif /* SURICATA_DETECT_IKE_KEY_EXCHANGE_PAYLOAD_LENGTH_H */
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