mirror of https://github.com/OISF/suricata
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/* Copyright (C) 2023 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 Philippe Antoine
|
|
*
|
|
* Set up ENIP Product name keyword
|
|
*/
|
|
|
|
#include "suricata-common.h"
|
|
#include "detect-parse.h"
|
|
#include "detect-engine.h"
|
|
#include "detect-engine-prefilter.h"
|
|
#include "rust.h"
|
|
|
|
#include "detect-enip-product-name.h"
|
|
|
|
static int g_enip_product_name_id = 0;
|
|
|
|
/**
|
|
* \brief this function is used to setup sticky buffer inspection for product_name
|
|
*
|
|
* \param de_ctx pointer to the Detection Engine Context
|
|
* \param s pointer to the Current Signature
|
|
* \param rulestr pointer to the user provided enip product name options
|
|
*
|
|
* \retval 0 on Success
|
|
* \retval -1 on Failure
|
|
*/
|
|
static int DetectEnipProductNameSetup(DetectEngineCtx *de_ctx, Signature *s, const char *rulestr)
|
|
{
|
|
if (DetectBufferSetActiveList(de_ctx, s, g_enip_product_name_id) < 0)
|
|
return -1;
|
|
|
|
if (DetectSignatureSetAppProto(s, ALPROTO_ENIP) != 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static InspectionBuffer *GetData(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 (SCEnipTxGetProductName(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;
|
|
}
|
|
|
|
/**
|
|
* \brief Registration function for enip.product_name: keyword
|
|
*/
|
|
void DetectEnipProductNameRegister(void)
|
|
{
|
|
sigmatch_table[DETECT_ENIP_PRODUCTNAME].name = "enip.product_name"; // rule keyword
|
|
sigmatch_table[DETECT_ENIP_PRODUCTNAME].desc =
|
|
"sticky buffer to match EtherNet/IP product name";
|
|
sigmatch_table[DETECT_ENIP_PRODUCTNAME].url = "/rules/enip-keyword.html#enip-product-name";
|
|
sigmatch_table[DETECT_ENIP_PRODUCTNAME].Setup = DetectEnipProductNameSetup;
|
|
sigmatch_table[DETECT_ENIP_PRODUCTNAME].flags |= SIGMATCH_NOOPT;
|
|
|
|
DetectAppLayerInspectEngineRegister("enip.product_name", ALPROTO_ENIP, SIG_FLAG_TOCLIENT, 0,
|
|
DetectEngineInspectBufferGeneric, GetData);
|
|
|
|
DetectAppLayerMpmRegister("enip.product_name", SIG_FLAG_TOCLIENT, 2,
|
|
PrefilterGenericMpmRegister, GetData, ALPROTO_ENIP, 1);
|
|
|
|
DetectBufferTypeSetDescriptionByName("enip.product_name", "ENIP product name");
|
|
g_enip_product_name_id = DetectBufferTypeGetByName("enip.product_name");
|
|
}
|