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/* Copyright (C) 2007-2016 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 Victor Julien <victor@inliniac.net>
* \author Duarte Silva <duarte.silva@serializing.me>
*
*/
#include "suricata-common.h"
#include "detect-engine.h"
#include "detect-file-hash-common.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
#include "detect-filesha1.h"
static int DetectFileSha1Setup (DetectEngineCtx *, Signature *, const char *);
#ifdef UNITTESTS
static void DetectFileSha1RegisterTests(void);
#endif
static int g_file_match_list_id = 0;
/**
* \brief Registration function for keyword: filesha1
*/
void DetectFileSha1Register(void)
{
sigmatch_table[DETECT_FILESHA1].name = "filesha1";
sigmatch_table[DETECT_FILESHA1].desc = "match file SHA-1 against list of SHA-1 checksums";
sigmatch_table[DETECT_FILESHA1].url = "/rules/file-keywords.html#filesha1";
sigmatch_table[DETECT_FILESHA1].FileMatch = DetectFileHashMatch;
sigmatch_table[DETECT_FILESHA1].Setup = DetectFileSha1Setup;
sigmatch_table[DETECT_FILESHA1].Free = DetectFileHashFree;
#ifdef UNITTESTS
sigmatch_table[DETECT_FILESHA1].RegisterTests = DetectFileSha1RegisterTests;
#endif
g_file_match_list_id = DetectBufferTypeRegister("files");
SCLogDebug("registering filesha1 rule option");
return;
}
/**
* \brief this function is used to parse filesha1 options
* \brief into the current signature
*
* \param de_ctx pointer to the Detection Engine Context
* \param s pointer to the Current Signature
* \param str pointer to the user provided "filesha1" option
*/
static int DetectFileSha1Setup (DetectEngineCtx *de_ctx, Signature *s, const char *str)
{
return DetectFileHashSetup(de_ctx, s, str, DETECT_FILESHA1, g_file_match_list_id);
}
#ifdef UNITTESTS
static int SHA1MatchLookupString(ROHashTable *hash, const char *string)
{
uint8_t sha1[20];
if (ReadHashString(sha1, string, "file", 88, 40) == 1) {
void *ptr = ROHashLookup(hash, &sha1, (uint16_t)sizeof(sha1));
if (ptr == NULL)
return 0;
else
return 1;
}
return 0;
}
static int SHA1MatchTest01(void)
{
ROHashTable *hash = ROHashInit(4, 20);
FAIL_IF_NULL(hash);
FAIL_IF(LoadHashTable(hash, "447661c5de965bd4d837b50244467e37bddc184d", "file", 1,
DETECT_FILESHA1) != 1);
FAIL_IF(LoadHashTable(hash, "75a9af1e34dc0bb2f7fcde9d56b2503072ac35dd", "file", 2,
DETECT_FILESHA1) != 1);
FAIL_IF(LoadHashTable(hash, "53224a297bbb30631670fdcd2d295d87a1d328e9", "file", 3,
DETECT_FILESHA1) != 1);
FAIL_IF(LoadHashTable(hash, "3395856ce81f2b7382dee72602f798b642f14140", "file", 4,
DETECT_FILESHA1) != 1);
FAIL_IF(LoadHashTable(hash, "65559245709fe98052eb284577f1fd61c01ad20d", "file", 5,
DETECT_FILESHA1) != 1);
FAIL_IF(LoadHashTable(hash, "0931fd4e05e6ea81c75f8488ecc1db9e66f22cbb", "file", 6,
DETECT_FILESHA1) != 1);
FAIL_IF(ROHashInitFinalize(hash) != 1);
FAIL_IF(SHA1MatchLookupString(hash, "447661c5de965bd4d837b50244467e37bddc184d") != 1);
FAIL_IF(SHA1MatchLookupString(hash, "75a9af1e34dc0bb2f7fcde9d56b2503072ac35dd") != 1);
FAIL_IF(SHA1MatchLookupString(hash, "53224a297bbb30631670fdcd2d295d87a1d328e9") != 1);
FAIL_IF(SHA1MatchLookupString(hash, "3395856ce81f2b7382dee72602f798b642f14140") != 1);
FAIL_IF(SHA1MatchLookupString(hash, "65559245709fe98052eb284577f1fd61c01ad20d") != 1);
FAIL_IF(SHA1MatchLookupString(hash, "0931fd4e05e6ea81c75f8488ecc1db9e66f22cbb") != 1);
/* Shouldn't match */
FAIL_IF(SHA1MatchLookupString(hash, "3333333333333333333333333333333333333333") == 1);
ROHashFree(hash);
PASS;
}
static void DetectFileSha1RegisterTests(void)
{
UtRegisterTest("SHA1MatchTest01", SHA1MatchTest01);
}
#endif
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