|
|
|
/* Copyright (C) 2007-2010 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 Pablo Rincon <pablo.rincon.crespo@gmail.com>
|
|
|
|
*
|
|
|
|
* Implements isdataat keyword
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "suricata-common.h"
|
|
|
|
#include "debug.h"
|
|
|
|
#include "decode.h"
|
|
|
|
#include "detect.h"
|
|
|
|
#include "detect-engine.h"
|
|
|
|
#include "detect-parse.h"
|
|
|
|
#include "app-layer.h"
|
|
|
|
|
|
|
|
#include "util-unittest.h"
|
|
|
|
#include "util-unittest-helper.h"
|
|
|
|
|
|
|
|
#include "detect-isdataat.h"
|
|
|
|
#include "detect-content.h"
|
|
|
|
#include "detect-uricontent.h"
|
|
|
|
|
|
|
|
#include "flow.h"
|
|
|
|
#include "flow-var.h"
|
|
|
|
|
|
|
|
#include "util-debug.h"
|
|
|
|
#include "util-byte.h"
|
|
|
|
#include "detect-pcre.h"
|
|
|
|
#include "detect-bytejump.h"
|
|
|
|
#include "detect-byte-extract.h"
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \brief Regex for parsing our isdataat options
|
|
|
|
*/
|
|
|
|
#define PARSE_REGEX "^\\s*!?([^\\s,]+)\\s*(,\\s*relative)?\\s*(,\\s*rawbytes\\s*)?\\s*$"
|
|
|
|
|
|
|
|
static pcre *parse_regex;
|
|
|
|
static pcre_extra *parse_regex_study;
|
|
|
|
|
|
|
|
int DetectIsdataatMatch (ThreadVars *, DetectEngineThreadCtx *, Packet *, Signature *, SigMatch *);
|
|
|
|
int DetectIsdataatSetup (DetectEngineCtx *, Signature *, char *);
|
|
|
|
void DetectIsdataatRegisterTests(void);
|
|
|
|
void DetectIsdataatFree(void *);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \brief Registration function for isdataat: keyword
|
|
|
|
*/
|
|
|
|
void DetectIsdataatRegister(void)
|
|
|
|
{
|
|
|
|
sigmatch_table[DETECT_ISDATAAT].name = "isdataat";
|
|
|
|
sigmatch_table[DETECT_ISDATAAT].desc = "check if there is still data at a specific part of the payload";
|
|
|
|
sigmatch_table[DETECT_ISDATAAT].url = "https://redmine.openinfosecfoundation.org/projects/suricata/wiki/Payload_keywords#Isadataat";
|
|
|
|
sigmatch_table[DETECT_ISDATAAT].Match = DetectIsdataatMatch;
|
|
|
|
sigmatch_table[DETECT_ISDATAAT].Setup = DetectIsdataatSetup;
|
|
|
|
sigmatch_table[DETECT_ISDATAAT].Free = DetectIsdataatFree;
|
|
|
|
sigmatch_table[DETECT_ISDATAAT].RegisterTests = DetectIsdataatRegisterTests;
|
|
|
|
|
|
|
|
sigmatch_table[DETECT_ISDATAAT].flags |= SIGMATCH_PAYLOAD;
|
|
|
|
|
|
|
|
const char *eb;
|
|
|
|
int eo;
|
|
|
|
int opts = 0;
|
|
|
|
|
|
|
|
parse_regex = pcre_compile(PARSE_REGEX, opts, &eb, &eo, NULL);
|
|
|
|
if(parse_regex == NULL) {
|
|
|
|
SCLogError(SC_ERR_PCRE_COMPILE, "pcre compile of \"%s\" failed at offset %" PRId32 ": %s", PARSE_REGEX, eo, eb);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
parse_regex_study = pcre_study(parse_regex, 0, &eb);
|
|
|
|
if(eb != NULL) {
|
|
|
|
SCLogError(SC_ERR_PCRE_STUDY, "pcre study failed: %s", eb);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
return;
|
|
|
|
|
|
|
|
error:
|
|
|
|
/* XXX */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \brief This function is used to match isdataat on a packet
|
|
|
|
* \todo We need to add support for rawbytes
|
|
|
|
*
|
|
|
|
* \param t pointer to thread vars
|
|
|
|
* \param det_ctx pointer to the pattern matcher thread
|
|
|
|
* \param p pointer to the current packet
|
|
|
|
* \param m pointer to the sigmatch that we will cast into DetectIsdataatData
|
|
|
|
*
|
|
|
|
* \retval 0 no match
|
|
|
|
* \retval 1 match
|
|
|
|
*/
|
|
|
|
int DetectIsdataatMatch (ThreadVars *t, DetectEngineThreadCtx *det_ctx, Packet *p, Signature *s, SigMatch *m)
|
|
|
|
{
|
|
|
|
DetectIsdataatData *idad = (DetectIsdataatData *)m->ctx;
|
|
|
|
|
|
|
|
SCLogDebug("payload_len: %u , dataat? %u ; relative? %u...", p->payload_len,idad->dataat,idad->flags &ISDATAAT_RELATIVE);
|
|
|
|
|
|
|
|
/* Relative to the last matched content is not performed here, returning match (content should take care of this)*/
|
|
|
|
if (idad->flags & ISDATAAT_RELATIVE)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
/* its not relative and we have more data in the packet than the offset of isdataat */
|
|
|
|
if (p->payload_len >= idad->dataat) {
|
|
|
|
SCLogDebug("matched with payload_len: %u , dataat? %u ; relative? %u...", p->payload_len,idad->dataat,idad->flags &ISDATAAT_RELATIVE);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \brief This function is used to parse isdataat options passed via isdataat: keyword
|
|
|
|
*
|
|
|
|
* \param isdataatstr Pointer to the user provided isdataat options
|
|
|
|
*
|
|
|
|
* \retval idad pointer to DetectIsdataatData on success
|
|
|
|
* \retval NULL on failure
|
|
|
|
*/
|
|
|
|
DetectIsdataatData *DetectIsdataatParse (char *isdataatstr, char **offset)
|
|
|
|
{
|
|
|
|
DetectIsdataatData *idad = NULL;
|
|
|
|
char *args[3] = {NULL,NULL,NULL};
|
|
|
|
#define MAX_SUBSTRINGS 30
|
|
|
|
int ret = 0, res = 0;
|
|
|
|
int ov[MAX_SUBSTRINGS];
|
|
|
|
int i=0;
|
|
|
|
|
|
|
|
ret = pcre_exec(parse_regex, parse_regex_study, isdataatstr, strlen(isdataatstr), 0, 0, ov, MAX_SUBSTRINGS);
|
|
|
|
if (ret < 1 || ret > 4) {
|
|
|
|
SCLogError(SC_ERR_PCRE_MATCH, "pcre_exec parse error, ret %" PRId32 ", string %s", ret, isdataatstr);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ret > 1) {
|
|
|
|
const char *str_ptr;
|
|
|
|
res = pcre_get_substring((char *)isdataatstr, ov, MAX_SUBSTRINGS, 1, &str_ptr);
|
|
|
|
if (res < 0) {
|
|
|
|
SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed");
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
args[0] = (char *)str_ptr;
|
|
|
|
|
|
|
|
|
|
|
|
if (ret > 2) {
|
|
|
|
res = pcre_get_substring((char *)isdataatstr, ov, MAX_SUBSTRINGS, 2, &str_ptr);
|
|
|
|
if (res < 0) {
|
|
|
|
SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed");
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
args[1] = (char *)str_ptr;
|
|
|
|
}
|
|
|
|
if (ret > 3) {
|
|
|
|
res = pcre_get_substring((char *)isdataatstr, ov, MAX_SUBSTRINGS, 3, &str_ptr);
|
|
|
|
if (res < 0) {
|
|
|
|
SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed");
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
args[2] = (char *)str_ptr;
|
|
|
|
}
|
|
|
|
|
|
|
|
idad = SCMalloc(sizeof(DetectIsdataatData));
|
|
|
|
if (unlikely(idad == NULL))
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
idad->flags = 0;
|
|
|
|
idad->dataat = 0;
|
|
|
|
|
|
|
|
if (args[0][0] != '-' && isalpha((unsigned char)args[0][0])) {
|
|
|
|
if (offset == NULL) {
|
|
|
|
SCLogError(SC_ERR_INVALID_ARGUMENT, "isdataat supplied with "
|
|
|
|
"var name for offset. \"offset\" argument supplied to "
|
|
|
|
"this function has to be non-NULL");
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
*offset = SCStrdup(args[0]);
|
|
|
|
if (*offset == NULL)
|
|
|
|
goto error;
|
|
|
|
} else {
|
|
|
|
if (ByteExtractStringUint16(&idad->dataat, 10,
|
|
|
|
strlen(args[0]), args[0]) < 0 ) {
|
|
|
|
SCLogError(SC_ERR_INVALID_VALUE, "isdataat out of range");
|
|
|
|
SCFree(idad);
|
|
|
|
idad = NULL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (args[1] !=NULL) {
|
|
|
|
idad->flags |= ISDATAAT_RELATIVE;
|
|
|
|
|
|
|
|
if(args[2] !=NULL)
|
|
|
|
idad->flags |= ISDATAAT_RAWBYTES;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (isdataatstr[0] == '!') {
|
|
|
|
idad->flags |= ISDATAAT_NEGATED;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < (ret -1); i++) {
|
|
|
|
if (args[i] != NULL)
|
|
|
|
SCFree(args[i]);
|
|
|
|
}
|
|
|
|
|
|
|
|
return idad;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
error:
|
|
|
|
for (i = 0; i < (ret -1) && i < 3; i++){
|
|
|
|
if (args[i] != NULL)
|
|
|
|
SCFree(args[i]);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (idad != NULL)
|
|
|
|
DetectIsdataatFree(idad);
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \brief This function is used to add the parsed isdataatdata into the current
|
|
|
|
* signature.
|
|
|
|
* \param de_ctx pointer to the Detection Engine Context
|
|
|
|
* \param s pointer to the Current Signature
|
|
|
|
* \param isdataatstr pointer to the user provided isdataat options
|
|
|
|
*
|
|
|
|
* \retval 0 on Success
|
|
|
|
* \retval -1 on Failure
|
|
|
|
*/
|
|
|
|
int DetectIsdataatSetup (DetectEngineCtx *de_ctx, Signature *s, char *isdataatstr)
|
|
|
|
{
|
|
|
|
SigMatch *sm = NULL;
|
|
|
|
SigMatch *prev_pm = NULL;
|
|
|
|
DetectIsdataatData *idad = NULL;
|
|
|
|
char *offset = NULL;
|
|
|
|
int ret = -1;
|
|
|
|
|
|
|
|
idad = DetectIsdataatParse(isdataatstr, &offset);
|
|
|
|
if (idad == NULL)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
int sm_list;
|
|
|
|
if (s->list != DETECT_SM_LIST_NOTSET) {
|
|
|
|
if (s->list == DETECT_SM_LIST_HSBDMATCH) {
|
|
|
|
AppLayerHtpEnableResponseBodyCallback();
|
|
|
|
s->alproto = ALPROTO_HTTP;
|
|
|
|
}
|
|
|
|
sm_list = s->list;
|
|
|
|
s->flags |= SIG_FLAG_APPLAYER;
|
|
|
|
if (idad->flags & ISDATAAT_RELATIVE) {
|
|
|
|
prev_pm = SigMatchGetLastSMFromLists(s, 4,
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[sm_list],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[sm_list]);
|
|
|
|
}
|
|
|
|
} else if (idad->flags & ISDATAAT_RELATIVE) {
|
|
|
|
prev_pm = SigMatchGetLastSMFromLists(s, 168,
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_PMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_UMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HCBDMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HHDMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HRHDMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HMDMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HCDMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HRUDMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HSMDMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HSCDMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HUADMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HHHDMATCH],
|
|
|
|
DETECT_CONTENT, s->sm_lists_tail[DETECT_SM_LIST_HRHHDMATCH],
|
|
|
|
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_PMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_UMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HCBDMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HHDMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HRHDMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HMDMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HCDMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HRUDMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HSMDMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HSCDMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HUADMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HHHDMATCH],
|
|
|
|
DETECT_PCRE, s->sm_lists_tail[DETECT_SM_LIST_HRHHDMATCH],
|
|
|
|
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_PMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_UMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HCBDMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HHDMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HRHDMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HMDMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HCDMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HRUDMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HSMDMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HSCDMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HUADMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HHHDMATCH],
|
|
|
|
DETECT_BYTETEST, s->sm_lists_tail[DETECT_SM_LIST_HRHHDMATCH],
|
|
|
|
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_PMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_UMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HCBDMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HHDMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HRHDMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HMDMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HCDMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HRUDMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HSMDMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HSCDMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HUADMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HHHDMATCH],
|
|
|
|
DETECT_BYTEJUMP, s->sm_lists_tail[DETECT_SM_LIST_HRHHDMATCH],
|
|
|
|
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_PMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_UMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HCBDMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HHDMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HRHDMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HMDMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HCDMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HRUDMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HSMDMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HSCDMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HUADMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HHHDMATCH],
|
|
|
|
DETECT_BYTE_EXTRACT, s->sm_lists_tail[DETECT_SM_LIST_HRHHDMATCH],
|
|
|
|
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_PMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_UMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HCBDMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HHDMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HRHDMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HMDMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HCDMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HRUDMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HSMDMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HSCDMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HUADMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HHHDMATCH],
|
|
|
|
DETECT_ISDATAAT, s->sm_lists_tail[DETECT_SM_LIST_HRHHDMATCH]);
|
|
|
|
if (prev_pm == NULL)
|
|
|
|
sm_list = DETECT_SM_LIST_PMATCH;
|
|
|
|
else {
|
|
|
|
sm_list = SigMatchListSMBelongsTo(s, prev_pm);
|
|
|
|
if (sm_list < 0)
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
sm_list = DETECT_SM_LIST_PMATCH;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (offset != NULL) {
|
|
|
|
SigMatch *bed_sm = DetectByteExtractRetrieveSMVar(offset, s, sm_list);
|
|
|
|
if (bed_sm == NULL) {
|
|
|
|
SCLogError(SC_ERR_INVALID_SIGNATURE, "Unknown byte_extract var "
|
|
|
|
"seen in isdataat - %s\n", offset);
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
idad->dataat = ((DetectByteExtractData *)bed_sm->ctx)->local_id;
|
|
|
|
idad->flags |= ISDATAAT_OFFSET_BE;
|
|
|
|
SCFree(offset);
|
|
|
|
}
|
|
|
|
|
|
|
|
sm = SigMatchAlloc();
|
|
|
|
if (sm == NULL)
|
|
|
|
goto end;
|
|
|
|
sm->type = DETECT_ISDATAAT;
|
|
|
|
sm->ctx = (void *)idad;
|
|
|
|
SigMatchAppendSMToList(s, sm, sm_list);
|
|
|
|
|
|
|
|
if (!(idad->flags & ISDATAAT_RELATIVE)) {
|
|
|
|
ret = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (prev_pm == NULL) {
|
|
|
|
ret = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (prev_pm->type == DETECT_CONTENT) {
|
|
|
|
DetectContentData *cd = (DetectContentData *)prev_pm->ctx;
|
|
|
|
cd->flags |= DETECT_CONTENT_RELATIVE_NEXT;
|
|
|
|
} else if (prev_pm->type == DETECT_PCRE) {
|
|
|
|
DetectPcreData *pd = (DetectPcreData *)prev_pm->ctx;
|
|
|
|
pd->flags |= DETECT_PCRE_RELATIVE_NEXT;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
end:
|
|
|
|
if (ret != 0)
|
|
|
|
DetectIsdataatFree(idad);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \brief this function will free memory associated with DetectIsdataatData
|
|
|
|
*
|
|
|
|
* \param idad pointer to DetectIsdataatData
|
|
|
|
*/
|
|
|
|
void DetectIsdataatFree(void *ptr) {
|
|
|
|
DetectIsdataatData *idad = (DetectIsdataatData *)ptr;
|
|
|
|
SCFree(idad);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef UNITTESTS
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test DetectIsdataatTestParse01 is a test to make sure that we return a correct IsdataatData structure
|
|
|
|
* when given valid isdataat opt
|
|
|
|
*/
|
|
|
|
int DetectIsdataatTestParse01 (void) {
|
|
|
|
int result = 0;
|
|
|
|
DetectIsdataatData *idad = NULL;
|
|
|
|
idad = DetectIsdataatParse("30 ", NULL);
|
|
|
|
if (idad != NULL) {
|
|
|
|
DetectIsdataatFree(idad);
|
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test DetectIsdataatTestParse02 is a test to make sure that we return a correct IsdataatData structure
|
|
|
|
* when given valid isdataat opt
|
|
|
|
*/
|
|
|
|
int DetectIsdataatTestParse02 (void) {
|
|
|
|
int result = 0;
|
|
|
|
DetectIsdataatData *idad = NULL;
|
|
|
|
idad = DetectIsdataatParse("30 , relative", NULL);
|
|
|
|
if (idad != NULL && idad->flags & ISDATAAT_RELATIVE && !(idad->flags & ISDATAAT_RAWBYTES)) {
|
|
|
|
DetectIsdataatFree(idad);
|
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test DetectIsdataatTestParse03 is a test to make sure that we return a correct IsdataatData structure
|
|
|
|
* when given valid isdataat opt
|
|
|
|
*/
|
|
|
|
int DetectIsdataatTestParse03 (void) {
|
|
|
|
int result = 0;
|
|
|
|
DetectIsdataatData *idad = NULL;
|
|
|
|
idad = DetectIsdataatParse("30,relative, rawbytes ", NULL);
|
|
|
|
if (idad != NULL && idad->flags & ISDATAAT_RELATIVE && idad->flags & ISDATAAT_RAWBYTES) {
|
|
|
|
DetectIsdataatFree(idad);
|
|
|
|
result = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test Test isdataat option for dce sig.
|
|
|
|
*/
|
|
|
|
int DetectIsdataatTestParse04(void)
|
|
|
|
{
|
|
|
|
Signature *s = SigAlloc();
|
|
|
|
int result = 1;
|
|
|
|
|
|
|
|
s->alproto = ALPROTO_DCERPC;
|
|
|
|
|
|
|
|
result &= (DetectIsdataatSetup(NULL, s, "30") == 0);
|
|
|
|
result &= (s->sm_lists[DETECT_SM_LIST_DMATCH] == NULL && s->sm_lists[DETECT_SM_LIST_PMATCH] != NULL);
|
|
|
|
SigFree(s);
|
|
|
|
|
|
|
|
s = SigAlloc();
|
|
|
|
s->alproto = ALPROTO_DCERPC;
|
|
|
|
/* failure since we have no preceding content/pcre/bytejump */
|
|
|
|
result &= (DetectIsdataatSetup(NULL, s, "30,relative") == 0);
|
|
|
|
result &= (s->sm_lists[DETECT_SM_LIST_DMATCH] == NULL && s->sm_lists[DETECT_SM_LIST_PMATCH] != NULL);
|
|
|
|
|
|
|
|
SigFree(s);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test Test isdataat option for dce sig.
|
|
|
|
*/
|
|
|
|
int DetectIsdataatTestParse05(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 1;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"dce_iface:3919286a-b10c-11d0-9ba8-00c04fd92ef5; "
|
|
|
|
"dce_stub_data; "
|
|
|
|
"content:\"one\"; distance:0; "
|
|
|
|
"isdataat:4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_DMATCH] == NULL) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_DMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_DMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s->next = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"dce_iface:3919286a-b10c-11d0-9ba8-00c04fd92ef5; "
|
|
|
|
"dce_stub_data; "
|
|
|
|
"content:\"one\"; distance:0; "
|
|
|
|
"isdataat:4,relative; sid:1;)");
|
|
|
|
if (s->next == NULL) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
s = s->next;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_DMATCH] == NULL) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_DMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_DMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s->next = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"dce_iface:3919286a-b10c-11d0-9ba8-00c04fd92ef5; "
|
|
|
|
"dce_stub_data; "
|
|
|
|
"content:\"one\"; distance:0; "
|
|
|
|
"isdataat:4,relative,rawbytes; sid:1;)");
|
|
|
|
if (s->next == NULL) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
s = s->next;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_DMATCH] == NULL) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_DMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_DMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
!(data->flags & ISDATAAT_RAWBYTES) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s->next = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"content:\"one\"; isdataat:4,relative,rawbytes; sid:1;)");
|
|
|
|
if (s->next == NULL) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
s = s->next;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_DMATCH] != NULL) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
int DetectIsdataatTestParse06(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"content:\"one\"; "
|
|
|
|
"isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_PMATCH] == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_PMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_PMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
int DetectIsdataatTestParse07(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"uricontent:\"one\"; "
|
|
|
|
"isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_UMATCH] == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_UMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_UMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
int DetectIsdataatTestParse08(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"content:\"one\"; http_uri; "
|
|
|
|
"isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_UMATCH] == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_UMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_UMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
int DetectIsdataatTestParse09(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"content:\"one\"; http_client_body; "
|
|
|
|
"isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_HCBDMATCH] == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_HCBDMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_HCBDMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
int DetectIsdataatTestParse10(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"content:\"one\"; http_header; "
|
|
|
|
"isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_HHDMATCH] == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_HHDMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_HHDMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
int DetectIsdataatTestParse11(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"flow:to_server; content:\"one\"; http_raw_header; "
|
|
|
|
"isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_HRHDMATCH] == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_HRHDMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_HRHDMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
int DetectIsdataatTestParse12(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"content:\"one\"; http_method; "
|
|
|
|
"isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_HMDMATCH] == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_HMDMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_HMDMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
int DetectIsdataatTestParse13(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing bytejump_body\"; "
|
|
|
|
"content:\"one\"; http_cookie; "
|
|
|
|
"isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_HCDMATCH] == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
|
|
|
|
result &= (s->sm_lists_tail[DETECT_SM_LIST_HCDMATCH]->type == DETECT_ISDATAAT);
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_HCDMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
result = 0;
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int DetectIsdataatTestParse14(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing file_data and isdataat\"; "
|
|
|
|
"file_data; content:\"one\"; "
|
|
|
|
"isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH] == NULL) {
|
|
|
|
printf("server body list empty: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH]->type != DETECT_ISDATAAT) {
|
|
|
|
printf("last server body sm not isdataat: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test file_data with isdataat relative to it
|
|
|
|
*/
|
|
|
|
static int DetectIsdataatTestParse15(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing file_data and isdataat\"; "
|
|
|
|
"file_data; isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
printf("sig parse: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH] == NULL) {
|
|
|
|
printf("server body list empty: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH]->type != DETECT_ISDATAAT) {
|
|
|
|
printf("last server body sm not isdataat: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_HSBDMATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test dns_query with isdataat relative to it
|
|
|
|
*/
|
|
|
|
static int DetectIsdataatTestParse16(void)
|
|
|
|
{
|
|
|
|
DetectEngineCtx *de_ctx = NULL;
|
|
|
|
int result = 0;
|
|
|
|
Signature *s = NULL;
|
|
|
|
DetectIsdataatData *data = NULL;
|
|
|
|
|
|
|
|
de_ctx = DetectEngineCtxInit();
|
|
|
|
if (de_ctx == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
de_ctx->flags |= DE_QUIET;
|
|
|
|
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
|
|
|
|
"(msg:\"Testing dns_query and isdataat\"; "
|
|
|
|
"dns_query; isdataat:!4,relative; sid:1;)");
|
|
|
|
if (de_ctx->sig_list == NULL) {
|
|
|
|
printf("sig parse: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
s = de_ctx->sig_list;
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_DNSQUERY_MATCH] == NULL) {
|
|
|
|
printf("dns_query list empty: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->sm_lists_tail[DETECT_SM_LIST_DNSQUERY_MATCH]->type != DETECT_ISDATAAT) {
|
|
|
|
printf("last dns_query body sm not isdataat: ");
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
data = (DetectIsdataatData *)s->sm_lists_tail[DETECT_SM_LIST_DNSQUERY_MATCH]->ctx;
|
|
|
|
if ( !(data->flags & ISDATAAT_RELATIVE) ||
|
|
|
|
(data->flags & ISDATAAT_RAWBYTES) ||
|
|
|
|
!(data->flags & ISDATAAT_NEGATED) ) {
|
|
|
|
goto end;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = 1;
|
|
|
|
end:
|
|
|
|
SigGroupCleanup(de_ctx);
|
|
|
|
SigCleanSignatures(de_ctx);
|
|
|
|
DetectEngineCtxFree(de_ctx);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test DetectIsdataatTestPacket01 is a test to check matches of
|
|
|
|
* isdataat, and isdataat relative
|
|
|
|
*/
|
|
|
|
int DetectIsdataatTestPacket01 (void) {
|
|
|
|
int result = 0;
|
|
|
|
uint8_t *buf = (uint8_t *)"Hi all!";
|
|
|
|
uint16_t buflen = strlen((char *)buf);
|
|
|
|
Packet *p[3];
|
|
|
|
p[0] = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_TCP);
|
|
|
|
p[1] = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_UDP);
|
|
|
|
p[2] = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_ICMP);
|
|
|
|
|
|
|
|
if (p[0] == NULL || p[1] == NULL ||p[2] == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
char *sigs[5];
|
|
|
|
sigs[0]= "alert ip any any -> any any (msg:\"Testing window 1\"; isdataat:6; sid:1;)";
|
|
|
|
sigs[1]= "alert ip any any -> any any (msg:\"Testing window 2\"; content:\"all\"; isdataat:1, relative; isdataat:6; sid:2;)";
|
|
|
|
sigs[2]= "alert ip any any -> any any (msg:\"Testing window 3\"; isdataat:8; sid:3;)";
|
|
|
|
sigs[3]= "alert ip any any -> any any (msg:\"Testing window 4\"; content:\"Hi\"; isdataat:5, relative; sid:4;)";
|
|
|
|
sigs[4]= "alert ip any any -> any any (msg:\"Testing window 4\"; content:\"Hi\"; isdataat:6, relative; sid:5;)";
|
|
|
|
|
|
|
|
uint32_t sid[5] = {1, 2, 3, 4, 5};
|
|
|
|
|
|
|
|
uint32_t results[3][5] = {
|
|
|
|
/* packet 0 match sid 1 but should not match sid 2 */
|
|
|
|
{1, 1, 0, 1, 0},
|
|
|
|
/* packet 1 should not match */
|
|
|
|
{1, 1, 0, 1, 0},
|
|
|
|
/* packet 2 should not match */
|
|
|
|
{1, 1, 0, 1, 0} };
|
|
|
|
|
|
|
|
result = UTHGenericTest(p, 3, sigs, sid, (uint32_t *) results, 5);
|
|
|
|
|
|
|
|
UTHFreePackets(p, 3);
|
|
|
|
end:
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test DetectIsdataatTestPacket02 is a test to check matches of
|
|
|
|
* isdataat, and isdataat relative works if the previous keyword is pcre
|
|
|
|
* (bug 144)
|
|
|
|
*/
|
|
|
|
int DetectIsdataatTestPacket02 (void) {
|
|
|
|
int result = 0;
|
|
|
|
uint8_t *buf = (uint8_t *)"GET /AllWorkAndNoPlayMakesWillADullBoy HTTP/1.0"
|
|
|
|
"User-Agent: Wget/1.11.4"
|
|
|
|
"Accept: */*"
|
|
|
|
"Host: www.google.com"
|
|
|
|
"Connection: Keep-Alive"
|
|
|
|
"Date: Mon, 04 Jan 2010 17:29:39 GMT";
|
|
|
|
uint16_t buflen = strlen((char *)buf);
|
|
|
|
Packet *p;
|
|
|
|
p = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_TCP);
|
|
|
|
|
|
|
|
if (p == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
char sig[] = "alert tcp any any -> any any (msg:\"pcre with"
|
|
|
|
" isdataat + relative\"; pcre:\"/A(ll|pp)WorkAndNoPlayMakesWillA"
|
|
|
|
"DullBoy/\"; isdataat:96,relative; sid:1;)";
|
|
|
|
|
|
|
|
result = UTHPacketMatchSig(p, sig);
|
|
|
|
|
|
|
|
UTHFreePacket(p);
|
|
|
|
end:
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \test DetectIsdataatTestPacket03 is a test to check matches of
|
|
|
|
* isdataat, and isdataat relative works if the previous keyword is byte_jump
|
|
|
|
* (bug 146)
|
|
|
|
*/
|
|
|
|
int DetectIsdataatTestPacket03 (void) {
|
|
|
|
int result = 0;
|
|
|
|
uint8_t *buf = (uint8_t *)"GET /AllWorkAndNoPlayMakesWillADullBoy HTTP/1.0"
|
|
|
|
"User-Agent: Wget/1.11.4"
|
|
|
|
"Accept: */*"
|
|
|
|
"Host: www.google.com"
|
|
|
|
"Connection: Keep-Alive"
|
|
|
|
"Date: Mon, 04 Jan 2010 17:29:39 GMT";
|
|
|
|
uint16_t buflen = strlen((char *)buf);
|
|
|
|
Packet *p;
|
|
|
|
p = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_TCP);
|
|
|
|
|
|
|
|
if (p == NULL)
|
|
|
|
goto end;
|
|
|
|
|
|
|
|
char sig[] = "alert tcp any any -> any any (msg:\"byte_jump match = 0 "
|
|
|
|
"with distance content HTTP/1. relative against HTTP/1.0\"; byte_jump:1,"
|
|
|
|
"46,string,dec; isdataat:87,relative; sid:109; rev:1;)";
|
|
|
|
|
|
|
|
result = UTHPacketMatchSig(p, sig);
|
|
|
|
|
|
|
|
UTHFreePacket(p);
|
|
|
|
end:
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \brief this function registers unit tests for DetectIsdataat
|
|
|
|
*/
|
|
|
|
void DetectIsdataatRegisterTests(void) {
|
|
|
|
#ifdef UNITTESTS
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse01", DetectIsdataatTestParse01, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse02", DetectIsdataatTestParse02, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse03", DetectIsdataatTestParse03, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse04", DetectIsdataatTestParse04, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse05", DetectIsdataatTestParse05, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse06", DetectIsdataatTestParse06, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse07", DetectIsdataatTestParse07, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse08", DetectIsdataatTestParse08, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse09", DetectIsdataatTestParse09, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse10", DetectIsdataatTestParse10, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse11", DetectIsdataatTestParse11, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse12", DetectIsdataatTestParse12, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse13", DetectIsdataatTestParse13, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse14", DetectIsdataatTestParse14, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse15", DetectIsdataatTestParse15, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestParse16", DetectIsdataatTestParse16, 1);
|
|
|
|
|
|
|
|
UtRegisterTest("DetectIsdataatTestPacket01", DetectIsdataatTestPacket01, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestPacket02", DetectIsdataatTestPacket02, 1);
|
|
|
|
UtRegisterTest("DetectIsdataatTestPacket03", DetectIsdataatTestPacket03, 1);
|
|
|
|
#endif
|
|
|
|
}
|