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/* Copyright (C) 2020 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.
*/
/**
*
* \author Frank Honza <frank.honza@dcso.de>
*/
#include "suricata-common.h"
#include "threads.h"
#include "decode.h"
#include "detect.h"
#include "detect-parse.h"
#include "detect-engine.h"
#include "detect-engine-mpm.h"
#include "detect-engine-prefilter.h"
#include "detect-urilen.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.h"
#include "app-layer.h"
#include "app-layer-parser.h"
#include "detect-ike-key-exchange-payload.h"
#include "stream-tcp.h"
#include "rust.h"
#include "app-layer-ike.h"
#include "rust-bindings.h"
#define KEYWORD_NAME_KEY_EXCHANGE "ike.key_exchange_payload"
#define KEYWORD_DOC_KEY_EXCHANGE "ike-keywords.html#ike-key_exchange_payload";
#define BUFFER_NAME_KEY_EXCHANGE "ike.key_exchange_payload"
#define BUFFER_DESC_KEY_EXCHANGE "ike key_exchange payload"
static int g_buffer_key_exchange_id = 0;
static int DetectKeyExchangeSetup(DetectEngineCtx *de_ctx, Signature *s, const char *str)
{
if (DetectBufferSetActiveList(de_ctx, s, g_buffer_key_exchange_id) < 0)
return -1;
if (DetectSignatureSetAppProto(s, ALPROTO_IKE) < 0)
return -1;
return 0;
}
static InspectionBuffer *GetKeyExchangeData(DetectEngineThreadCtx *det_ctx,
const DetectEngineTransforms *transforms, Flow *_f, const uint8_t _flow_flags, void *txv,
const int list_id)
{
InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
if (buffer->inspect == NULL) {
const uint8_t *b = NULL;
uint32_t b_len = 0;
if (rs_ike_state_get_key_exchange(txv, &b, &b_len) != 1)
return NULL;
if (b == NULL || b_len == 0)
return NULL;
InspectionBufferSetup(det_ctx, list_id, buffer, b, b_len);
InspectionBufferApplyTransforms(buffer, transforms);
}
return buffer;
}
void DetectIkeKeyExchangeRegister(void)
{
// register key_exchange
sigmatch_table[DETECT_AL_IKE_KEY_EXCHANGE].name = KEYWORD_NAME_KEY_EXCHANGE;
sigmatch_table[DETECT_AL_IKE_KEY_EXCHANGE].url =
"/rules/" KEYWORD_DOC_KEY_EXCHANGE sigmatch_table[DETECT_AL_IKE_KEY_EXCHANGE].desc =
"sticky buffer to match on the IKE key_exchange_payload";
sigmatch_table[DETECT_AL_IKE_KEY_EXCHANGE].Setup = DetectKeyExchangeSetup;
sigmatch_table[DETECT_AL_IKE_KEY_EXCHANGE].flags |=
SIGMATCH_NOOPT | SIGMATCH_INFO_STICKY_BUFFER;
DetectAppLayerInspectEngineRegister2(BUFFER_NAME_KEY_EXCHANGE, ALPROTO_IKE, SIG_FLAG_TOSERVER,
1, DetectEngineInspectBufferGeneric, GetKeyExchangeData);
DetectAppLayerMpmRegister2(BUFFER_NAME_KEY_EXCHANGE, SIG_FLAG_TOSERVER, 1,
PrefilterGenericMpmRegister, GetKeyExchangeData, ALPROTO_IKE, 1);
DetectAppLayerInspectEngineRegister2(BUFFER_NAME_KEY_EXCHANGE, ALPROTO_IKE, SIG_FLAG_TOCLIENT,
1, DetectEngineInspectBufferGeneric, GetKeyExchangeData);
DetectAppLayerMpmRegister2(BUFFER_NAME_KEY_EXCHANGE, SIG_FLAG_TOCLIENT, 1,
PrefilterGenericMpmRegister, GetKeyExchangeData, ALPROTO_IKE, 1);
DetectBufferTypeSetDescriptionByName(BUFFER_NAME_KEY_EXCHANGE, BUFFER_DESC_KEY_EXCHANGE);
g_buffer_key_exchange_id = DetectBufferTypeGetByName(BUFFER_NAME_KEY_EXCHANGE);
SCLogDebug("registering " BUFFER_NAME_KEY_EXCHANGE " rule option");
}
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