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.
143 lines
4.7 KiB
C
143 lines
4.7 KiB
C
/* Copyright (C) 2007-2018 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.
|
|
*/
|
|
|
|
/**
|
|
* \ingroup httplayer
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
|
|
/**
|
|
* \file
|
|
*
|
|
* \author Anoop Saldanha <anoopsaldanha@gmail.com>
|
|
* \author Victor Julien <victor@inliniac.net>
|
|
*
|
|
* Implements support for the http_server_body keyword
|
|
*/
|
|
|
|
#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-state.h"
|
|
#include "detect-content.h"
|
|
#include "detect-pcre.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 "app-layer-htp.h"
|
|
#include "detect-http-server-body.h"
|
|
#include "stream-tcp.h"
|
|
|
|
static int DetectHttpServerBodySetup(DetectEngineCtx *, Signature *, const char *);
|
|
static int DetectHttpServerBodySetupSticky(DetectEngineCtx *de_ctx, Signature *s, const char *str);
|
|
#ifdef UNITTESTS
|
|
static void DetectHttpServerBodyRegisterTests(void);
|
|
#endif
|
|
static int g_file_data_buffer_id = 0;
|
|
|
|
/**
|
|
* \brief Registers the keyword handlers for the "http_server_body" keyword.
|
|
*/
|
|
void DetectHttpServerBodyRegister(void)
|
|
{
|
|
/* http_server_body content modifier */
|
|
sigmatch_table[DETECT_AL_HTTP_SERVER_BODY].name = "http_server_body";
|
|
sigmatch_table[DETECT_AL_HTTP_SERVER_BODY].desc = "content modifier to match on the HTTP response-body";
|
|
sigmatch_table[DETECT_AL_HTTP_SERVER_BODY].url = "/rules/http-keywords.html#http-server-body";
|
|
sigmatch_table[DETECT_AL_HTTP_SERVER_BODY].Setup = DetectHttpServerBodySetup;
|
|
#ifdef UNITTESTS
|
|
sigmatch_table[DETECT_AL_HTTP_SERVER_BODY].RegisterTests = DetectHttpServerBodyRegisterTests;
|
|
#endif
|
|
sigmatch_table[DETECT_AL_HTTP_SERVER_BODY].flags |= SIGMATCH_NOOPT;
|
|
sigmatch_table[DETECT_AL_HTTP_SERVER_BODY].flags |= SIGMATCH_INFO_CONTENT_MODIFIER;
|
|
sigmatch_table[DETECT_AL_HTTP_SERVER_BODY].alternative = DETECT_HTTP_RESPONSE_BODY;
|
|
|
|
/* http.request_body sticky buffer */
|
|
sigmatch_table[DETECT_HTTP_RESPONSE_BODY].name = "http.response_body";
|
|
sigmatch_table[DETECT_HTTP_RESPONSE_BODY].desc = "sticky buffer to match the HTTP response body buffer";
|
|
sigmatch_table[DETECT_HTTP_RESPONSE_BODY].url = "/rules/http-keywords.html#http-server-body";
|
|
sigmatch_table[DETECT_HTTP_RESPONSE_BODY].Setup = DetectHttpServerBodySetupSticky;
|
|
sigmatch_table[DETECT_HTTP_RESPONSE_BODY].flags |= SIGMATCH_NOOPT;
|
|
sigmatch_table[DETECT_HTTP_RESPONSE_BODY].flags |= SIGMATCH_INFO_STICKY_BUFFER;
|
|
|
|
g_file_data_buffer_id = DetectBufferTypeRegister("file_data");
|
|
}
|
|
|
|
/**
|
|
* \brief The setup function for the http_server_body keyword for a signature.
|
|
*
|
|
* \param de_ctx Pointer to the detection engine context.
|
|
* \param s Pointer to signature for the current Signature being parsed
|
|
* from the rules.
|
|
* \param m Pointer to the head of the SigMatchs for the current rule
|
|
* being parsed.
|
|
* \param arg Pointer to the string holding the keyword value.
|
|
*
|
|
* \retval 0 On success
|
|
* \retval -1 On failure
|
|
*/
|
|
int DetectHttpServerBodySetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
|
|
{
|
|
return DetectEngineContentModifierBufferSetup(
|
|
de_ctx, s, arg, DETECT_AL_HTTP_SERVER_BODY, g_file_data_buffer_id, ALPROTO_HTTP1);
|
|
}
|
|
|
|
/**
|
|
* \brief this function setup the http.response_body keyword used in the rule
|
|
*
|
|
* \param de_ctx Pointer to the Detection Engine Context
|
|
* \param s Pointer to the Signature to which the current keyword belongs
|
|
* \param str Should hold an empty string always
|
|
*
|
|
* \retval 0 On success
|
|
*/
|
|
static int DetectHttpServerBodySetupSticky(DetectEngineCtx *de_ctx, Signature *s, const char *str)
|
|
{
|
|
if (DetectBufferSetActiveList(de_ctx, s, g_file_data_buffer_id) < 0)
|
|
return -1;
|
|
if (DetectSignatureSetAppProto(s, ALPROTO_HTTP1) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
/************************************Unittests*********************************/
|
|
|
|
#ifdef UNITTESTS
|
|
#include "tests/detect-http-server-body.c"
|
|
#endif /* UNITTESTS */
|
|
|
|
/**
|
|
* @}
|
|
*/
|