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117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
/* Copyright (C) 2007-2020 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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* \file
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*
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* \author Victor Julien <victor@inliniac.net>
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*
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* Implements the sha1 transformation keyword
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*/
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#include "suricata-common.h"
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#include "detect.h"
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#include "detect-engine.h"
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#include "detect-engine-prefilter.h"
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#include "detect-parse.h"
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#include "detect-transform-sha1.h"
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#include "util-unittest.h"
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#include "util-print.h"
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#include "rust.h"
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static int DetectTransformToSha1Setup (DetectEngineCtx *, Signature *, const char *);
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#ifdef UNITTESTS
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static void DetectTransformToSha1RegisterTests(void);
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#endif
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static void TransformToSha1(InspectionBuffer *buffer, void *options);
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void DetectTransformSha1Register(void)
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{
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sigmatch_table[DETECT_TRANSFORM_SHA1].name = "to_sha1";
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sigmatch_table[DETECT_TRANSFORM_SHA1].desc =
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"convert to sha1 hash of the buffer";
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sigmatch_table[DETECT_TRANSFORM_SHA1].url =
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"/rules/transforms.html#to-sha1";
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sigmatch_table[DETECT_TRANSFORM_SHA1].Setup =
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DetectTransformToSha1Setup;
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sigmatch_table[DETECT_TRANSFORM_SHA1].Transform =
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TransformToSha1;
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#ifdef UNITTESTS
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sigmatch_table[DETECT_TRANSFORM_SHA1].RegisterTests =
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DetectTransformToSha1RegisterTests;
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#endif
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sigmatch_table[DETECT_TRANSFORM_SHA1].flags |= SIGMATCH_NOOPT;
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}
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/**
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* \internal
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* \brief Apply the nocase keyword to the last pattern match, either content or uricontent
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* \param det_ctx detection engine ctx
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* \param s signature
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* \param nullstr should be null
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* \retval 0 ok
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* \retval -1 failure
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*/
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static int DetectTransformToSha1Setup (DetectEngineCtx *de_ctx, Signature *s, const char *nullstr)
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{
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SCEnter();
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if (g_disable_hashing) {
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SCLogError(SC_ERR_HASHING_DISABLED, "SHA1 hashing has been disabled, "
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"needed for to_sha1 keyword");
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SCReturnInt(-1);
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}
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int r = DetectSignatureAddTransform(s, DETECT_TRANSFORM_SHA1, NULL);
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SCReturnInt(r);
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}
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static void TransformToSha1(InspectionBuffer *buffer, void *options)
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{
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const uint8_t *input = buffer->inspect;
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const uint32_t input_len = buffer->inspect_len;
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uint8_t output[SC_SHA1_LEN];
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//PrintRawDataFp(stdout, input, input_len);
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SCSha1HashBuffer(input, input_len, output, sizeof(output));
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InspectionBufferCopy(buffer, output, sizeof(output));
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}
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#ifdef UNITTESTS
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static int DetectTransformToSha1Test01(void)
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{
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const uint8_t *input = (const uint8_t *)" A B C D ";
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uint32_t input_len = strlen((char *)input);
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InspectionBuffer buffer;
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InspectionBufferInit(&buffer, 8);
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InspectionBufferSetup(NULL, -1, &buffer, input, input_len);
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PrintRawDataFp(stdout, buffer.inspect, buffer.inspect_len);
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TransformToSha1(&buffer, NULL);
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PrintRawDataFp(stdout, buffer.inspect, buffer.inspect_len);
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InspectionBufferFree(&buffer);
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PASS;
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}
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static void DetectTransformToSha1RegisterTests(void)
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{
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UtRegisterTest("DetectTransformToSha1Test01",
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DetectTransformToSha1Test01);
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}
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#endif
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