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.
140 lines
4.9 KiB
C
140 lines
4.9 KiB
C
/* 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-filesha256.h"
|
|
|
|
static int DetectFileSha256Setup (DetectEngineCtx *, Signature *, const char *);
|
|
#ifdef UNITTESTS
|
|
static void DetectFileSha256RegisterTests(void);
|
|
#endif
|
|
static int g_file_match_list_id = 0;
|
|
|
|
/**
|
|
* \brief Registration function for keyword: filesha256
|
|
*/
|
|
void DetectFileSha256Register(void)
|
|
{
|
|
sigmatch_table[DETECT_FILESHA256].name = "filesha256";
|
|
sigmatch_table[DETECT_FILESHA256].desc = "match file SHA-256 against list of SHA-256 checksums";
|
|
sigmatch_table[DETECT_FILESHA256].url = "/rules/file-keywords.html#filesha256";
|
|
sigmatch_table[DETECT_FILESHA256].FileMatch = DetectFileHashMatch;
|
|
sigmatch_table[DETECT_FILESHA256].Setup = DetectFileSha256Setup;
|
|
sigmatch_table[DETECT_FILESHA256].Free = DetectFileHashFree;
|
|
#ifdef UNITTESTS
|
|
sigmatch_table[DETECT_FILESHA256].RegisterTests = DetectFileSha256RegisterTests;
|
|
#endif
|
|
|
|
g_file_match_list_id = DetectBufferTypeRegister("files");
|
|
|
|
SCLogDebug("registering filesha256 rule option");
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* \brief this function is used to parse filesha256 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 "filesha256" option
|
|
*
|
|
* \retval 0 on Success
|
|
* \retval -1 on Failure
|
|
*/
|
|
static int DetectFileSha256Setup (DetectEngineCtx *de_ctx, Signature *s, const char *str)
|
|
{
|
|
return DetectFileHashSetup(de_ctx, s, str, DETECT_FILESHA256, g_file_match_list_id);
|
|
}
|
|
|
|
#ifdef UNITTESTS
|
|
static int SHA256MatchLookupString(ROHashTable *hash, const char *string)
|
|
{
|
|
uint8_t sha256[32];
|
|
if (ReadHashString(sha256, string, "file", 88, 64) == 1) {
|
|
void *ptr = ROHashLookup(hash, &sha256, (uint16_t)sizeof(sha256));
|
|
if (ptr == NULL)
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int SHA256MatchTest01(void)
|
|
{
|
|
ROHashTable *hash = ROHashInit(4, 32);
|
|
if (hash == NULL) {
|
|
return 0;
|
|
}
|
|
if (LoadHashTable(hash, "9c891edb5da763398969b6aaa86a5d46971bd28a455b20c2067cb512c9f9a0f8", "file", 1, DETECT_FILESHA256) != 1)
|
|
return 0;
|
|
if (LoadHashTable(hash, "6eee51705f34b6cfc7f0c872a7949ec3e3172a908303baf5d67d03b98f70e7e3", "file", 2, DETECT_FILESHA256) != 1)
|
|
return 0;
|
|
if (LoadHashTable(hash, "b12c7d57507286bbbe36d7acf9b34c22c96606ffd904e3c23008399a4a50c047", "file", 3, DETECT_FILESHA256) != 1)
|
|
return 0;
|
|
if (LoadHashTable(hash, "ca496e1ddadc290050339dd75ce8830ad3028ce1556a5368874a4aec3aee114b", "file", 4, DETECT_FILESHA256) != 1)
|
|
return 0;
|
|
if (LoadHashTable(hash, "275a021bbfb6489e54d471899f7db9d1663fc695ec2fe2a2c4538aabf651fd0f", "file", 5, DETECT_FILESHA256) != 1)
|
|
return 0;
|
|
if (LoadHashTable(hash, "d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9", "file", 6, DETECT_FILESHA256) != 1)
|
|
return 0;
|
|
|
|
if (ROHashInitFinalize(hash) != 1) {
|
|
return 0;
|
|
}
|
|
|
|
if (SHA256MatchLookupString(hash, "9c891edb5da763398969b6aaa86a5d46971bd28a455b20c2067cb512c9f9a0f8") != 1)
|
|
return 0;
|
|
if (SHA256MatchLookupString(hash, "6eee51705f34b6cfc7f0c872a7949ec3e3172a908303baf5d67d03b98f70e7e3") != 1)
|
|
return 0;
|
|
if (SHA256MatchLookupString(hash, "b12c7d57507286bbbe36d7acf9b34c22c96606ffd904e3c23008399a4a50c047") != 1)
|
|
return 0;
|
|
if (SHA256MatchLookupString(hash, "ca496e1ddadc290050339dd75ce8830ad3028ce1556a5368874a4aec3aee114b") != 1)
|
|
return 0;
|
|
if (SHA256MatchLookupString(hash, "275a021bbfb6489e54d471899f7db9d1663fc695ec2fe2a2c4538aabf651fd0f") != 1)
|
|
return 0;
|
|
if (SHA256MatchLookupString(hash, "d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9") != 1)
|
|
return 0;
|
|
/* Shouldn't match */
|
|
if (SHA256MatchLookupString(hash, "3333333333333333333333333333333333333333333333333333333333333333") == 1)
|
|
return 0;
|
|
|
|
ROHashFree(hash);
|
|
return 1;
|
|
}
|
|
|
|
void DetectFileSha256RegisterTests(void)
|
|
{
|
|
UtRegisterTest("SHA256MatchTest01", SHA256MatchTest01);
|
|
}
|
|
#endif
|