mirror of https://github.com/OISF/suricata
support for ssl_version keyword
Gurvinder Singh
15 years ago
committed by
Victor Julien
parent
a8417377e7
commit
8f8b1212af
@ -0,0 +1,772 @@
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/* Copyright (C) 2007-2010 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 detect-ssl-version.c
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*
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* \author Gurvinder Singh <gurvindersinghdahiya@gmail.com>
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*
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* Implements the ssl_version keyword
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*/
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#include "suricata-common.h"
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#include "threads.h"
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#include "debug.h"
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#include "decode.h"
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#include "detect.h"
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#include "detect-parse.h"
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#include "detect-engine.h"
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#include "detect-engine-mpm.h"
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#include "detect-engine-state.h"
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#include "flow.h"
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#include "flow-var.h"
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#include "flow-util.h"
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#include "util-debug.h"
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#include "util-unittest.h"
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#include "util-unittest-helper.h"
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#include "app-layer.h"
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#include "app-layer-tls.h"
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#include "detect-ssl-version.h"
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#include "stream-tcp.h"
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#include "app-layer-ssl.h"
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/**
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* \brief Regex for parsing "id" option, matching number or "number"
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*/
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#define PARSE_REGEX "^\\s*(!?[A-z0-9.]+)\\s*,?\\s*(!?[A-z0-9.]+)?\\s*\\,?\\s*" \
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"(!?[A-z0-9.]+)?\\s*,?\\s*(!?[A-z0-9.]+)?\\s*,?\\s*(!?[A-z0-9.]+)?\\s*$"
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static pcre *parse_regex;
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static pcre_extra *parse_regex_study;
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int DetectSslVersionMatch (ThreadVars *, DetectEngineThreadCtx *, Flow *,
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uint8_t, void *, Signature *, SigMatch *);
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static int DetectSslVersionSetup (DetectEngineCtx *, Signature *, char *);
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void DetectSslVersionRegisterTests(void);
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void DetectSslVersionFree(void *);
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/**
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* \brief Registration function for keyword: ssl_version
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*/
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void DetectSslVersionRegister (void) {
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sigmatch_table[DETECT_AL_SSL_VERSION].name = "ssl_version";
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sigmatch_table[DETECT_AL_SSL_VERSION].Match = NULL;
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sigmatch_table[DETECT_AL_SSL_VERSION].AppLayerMatch = DetectSslVersionMatch;
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sigmatch_table[DETECT_AL_SSL_VERSION].alproto = ALPROTO_TLS;
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sigmatch_table[DETECT_AL_SSL_VERSION].Setup = DetectSslVersionSetup;
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sigmatch_table[DETECT_AL_SSL_VERSION].Free = DetectSslVersionFree;
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sigmatch_table[DETECT_AL_SSL_VERSION].RegisterTests = DetectSslVersionRegisterTests;
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const char *eb;
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int eo;
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int opts = 0;
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SCLogDebug("registering ssl_version rule option");
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parse_regex = pcre_compile(PARSE_REGEX, opts, &eb, &eo, NULL);
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if (parse_regex == NULL) {
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SCLogError(SC_ERR_PCRE_COMPILE, "Compile of \"%s\" failed at offset %" PRId32 ": %s",
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PARSE_REGEX, eo, eb);
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goto error;
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}
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parse_regex_study = pcre_study(parse_regex, 0, &eb);
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if (eb != NULL) {
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SCLogError(SC_ERR_PCRE_STUDY, "pcre study failed: %s", eb);
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goto error;
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}
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return;
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error:
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return;
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}
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/**
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* \brief match the specified version on a ssl session
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*
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* \param t pointer to thread vars
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* \param det_ctx pointer to the pattern matcher thread
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* \param p pointer to the current packet
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* \param m pointer to the sigmatch that we will cast into DetectSslVersionData
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*
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* \retval 0 no match
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* \retval 1 match
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*/
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int DetectSslVersionMatch (ThreadVars *t, DetectEngineThreadCtx *det_ctx,
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Flow *f, uint8_t flags, void *state, Signature *s, SigMatch *m)
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{
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SCEnter();
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DetectSslVersionData *ssl = (DetectSslVersionData *)m->ctx;
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TlsState *app_state = (TlsState *)state;
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if (app_state == NULL) {
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SCLogDebug("no app state, no match");
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SCReturnInt(0);
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}
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if (ssl == NULL) {
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SCLogDebug("no ssl_version data, no match");
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SCReturnInt(0);
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}
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SCMutexLock(&f->m);
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int ret = 0;
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uint16_t ver = 0;
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uint8_t sig_ver = -1;
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if (flags & STREAM_TOCLIENT) {
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SCLogDebug("server (toclient) version is 0x%02X",
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app_state->server_version);
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ver = app_state->server_version;
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} else if (flags & STREAM_TOSERVER) {
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SCLogDebug("client (toserver) version is 0x%02X",
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app_state->client_version);
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ver = app_state->client_version;
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}
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switch(ver) {
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case SSL_VERSION_2:
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if (ver == ssl->data[SSLv2].ver)
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ret = 1;
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sig_ver = SSLv2;
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break;
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case SSL_VERSION_3:
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if (ver == ssl->data[SSLv3].ver)
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ret = 1;
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sig_ver = SSLv3;
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break;
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case TLS_VERSION_10:
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if (ver == ssl->data[TLS10].ver)
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ret = 1;
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sig_ver = TLS10;
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break;
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case TLS_VERSION_11:
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if (ver == ssl->data[TLS11].ver)
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ret = 1;
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sig_ver = TLS11;
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break;
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case TLS_VERSION_12:
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if (ver == ssl->data[TLS12].ver)
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ret = 1;
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sig_ver = TLS12;
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break;
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}
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SCMutexUnlock(&f->m);
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SCReturnInt(ret ^ ((ssl->data[sig_ver].flags & DETECT_SSL_VERSION_NEGATED) ? 1 : 0));
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}
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/**
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* \brief This function is used to parse ssl_version data passed via
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* keyword: "ssl_version"
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*
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* \param str Pointer to the user provided options
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*
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* \retval ssl pointer to DetectSslVersionData on success
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* \retval NULL on failure
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*/
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DetectSslVersionData *DetectSslVersionParse (char *str)
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{
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DetectSslVersionData *ssl = NULL;
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#define MAX_SUBSTRINGS 30
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int ret = 0, res = 0;
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int ov[MAX_SUBSTRINGS];
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ret = pcre_exec(parse_regex, parse_regex_study, str, strlen(str), 0, 0,
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ov, MAX_SUBSTRINGS);
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if (ret < 1 || ret > 5) {
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SCLogError(SC_ERR_PCRE_MATCH, "invalid ssl_version option");
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goto error;
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}
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if (ret > 1) {
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const char *str_ptr[5];
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char *orig;
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uint8_t found = 0, neg = 0;
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char *tmp_str;
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/* We have a correct ssl_version options */
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ssl = SCCalloc(1, sizeof (DetectSslVersionData));
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if (ssl == NULL)
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goto error;
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for (int i = 1; i <= 5; i++) {
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res = pcre_get_substring((char *) str, ov, MAX_SUBSTRINGS, i, &str_ptr[i]);
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if (res < 0) {
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SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed");
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if (found == 0)
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goto error;
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break;
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}
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orig = SCStrdup((char*) str_ptr[i]);
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tmp_str = orig;
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if (tmp_str == NULL) {
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goto error;
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}
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/* Let's see if we need to scape "'s */
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if (tmp_str[0] == '"') {
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tmp_str[strlen(tmp_str) - 1] = '\0';
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tmp_str += 1;
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}
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if (tmp_str[0] == '!') {
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neg = 1;
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tmp_str++;
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}
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if (strncasecmp("sslv2", tmp_str, 5) == 0) {
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ssl->data[SSLv2].ver = SSL_VERSION_2;
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if (neg == 1)
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ssl->data[SSLv2].flags |= DETECT_SSL_VERSION_NEGATED;
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} else if (strncasecmp("sslv3", tmp_str, 5) == 0) {
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ssl->data[SSLv3].ver = SSL_VERSION_3;
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if (neg == 1)
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ssl->data[SSLv3].flags |= DETECT_SSL_VERSION_NEGATED;
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} else if (strncasecmp("tls1.0", tmp_str, 6) == 0) {
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ssl->data[TLS10].ver = TLS_VERSION_10;
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if (neg == 1)
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ssl->data[TLS10].flags |= DETECT_SSL_VERSION_NEGATED;
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} else if (strncasecmp("tls1.1", tmp_str, 6) == 0) {
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ssl->data[TLS11].ver = TLS_VERSION_11;
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if (neg == 1)
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ssl->data[TLS11].flags |= DETECT_SSL_VERSION_NEGATED;
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} else if (strncasecmp("tls1.2", tmp_str, 6) == 0) {
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ssl->data[TLS12].ver = TLS_VERSION_12;
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if (neg == 1)
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ssl->data[TLS12].flags |= DETECT_SSL_VERSION_NEGATED;
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} else if (strcmp(tmp_str, "") == 0) {
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SCFree(orig);
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if (found == 0)
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goto error;
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break;
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} else {
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SCLogError(SC_ERR_INVALID_VALUE, "Invalid value");
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neg = 0;
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SCFree(orig);
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continue;
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}
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found = 1;
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neg = 0;
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SCFree(orig);
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}
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}
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return ssl;
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error:
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if (ssl != NULL)
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DetectSslVersionFree(ssl);
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return NULL;
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}
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/**
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* \brief this function is used to add the parsed "id" option
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* \brief into the current signature
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*
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* \param de_ctx pointer to the Detection Engine Context
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* \param s pointer to the Current Signature
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* \param idstr pointer to the user provided "id" option
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*
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* \retval 0 on Success
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* \retval -1 on Failure
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*/
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static int DetectSslVersionSetup (DetectEngineCtx *de_ctx, Signature *s, char *str)
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{
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DetectSslVersionData *ssl = NULL;
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SigMatch *sm = NULL;
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ssl = DetectSslVersionParse(str);
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if (ssl == NULL) goto error;
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/* Okay so far so good, lets get this into a SigMatch
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* and put it in the Signature. */
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sm = SigMatchAlloc();
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if (sm == NULL)
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goto error;
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sm->type = DETECT_AL_SSL_VERSION;
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sm->ctx = (void *)ssl;
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SigMatchAppendAppLayer(s, sm);
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if (s->alproto != ALPROTO_UNKNOWN && s->alproto != ALPROTO_TLS) {
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SCLogError(SC_ERR_CONFLICTING_RULE_KEYWORDS, "rule contains conflicting keywords.");
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goto error;
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}
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s->alproto = ALPROTO_TLS;
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return 0;
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error:
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if (ssl != NULL) DetectSslVersionFree(ssl);
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if (sm != NULL) SCFree(sm);
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return -1;
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}
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/**
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* \brief this function will free memory associated with DetectSslVersionData
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*
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* \param id_d pointer to DetectSslVersionData
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*/
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void DetectSslVersionFree(void *ptr) {
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DetectSslVersionData *svd = (DetectSslVersionData *)ptr;
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SCFree(svd);
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}
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#ifdef UNITTESTS /* UNITTESTS */
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/**
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* \test DetectSslVersionTestParse01 is a test to make sure that we parse the
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* "ssl_version" option correctly when given valid ssl_version option
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*/
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int DetectSslVersionTestParse01 (void) {
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DetectSslVersionData *ssl = NULL;
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ssl = DetectSslVersionParse("SSlv3");
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if (ssl != NULL && ssl->data[SSLv3].ver == SSL_VERSION_3) {
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DetectSslVersionFree(ssl);
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return 1;
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}
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return 0;
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}
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/**
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* \test DetectSslVersionTestParse02 is a test to make sure that we parse the
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* "ssl_version" option correctly when given an invalid ssl_version option
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* it should return ssl = NULL
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*/
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int DetectSslVersionTestParse02 (void) {
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DetectSslVersionData *ssl = NULL;
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ssl = DetectSslVersionParse("2.5");
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if (ssl == NULL) {
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DetectSslVersionFree(ssl);
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return 1;
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}
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return 0;
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}
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/**
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* \test DetectSslVersionTestParse03 is a test to make sure that we parse the
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* "ssl_version" options correctly when given valid ssl_version options
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*/
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int DetectSslVersionTestParse03 (void) {
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DetectSslVersionData *ssl = NULL;
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ssl = DetectSslVersionParse("SSlv3,tls1.0, !tls1.2");
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if (ssl != NULL && ssl->data[SSLv3].ver == SSL_VERSION_3 &&
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ssl->data[TLS10].ver == TLS_VERSION_10 &&
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ssl->data[TLS12].ver == TLS_VERSION_12 &&
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ssl->data[TLS12].flags & DETECT_SSL_VERSION_NEGATED)
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{
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DetectSslVersionFree(ssl);
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return 1;
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}
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return 0;
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}
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#include "stream-tcp-reassemble.h"
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/** \test Send a get request in three chunks + more data. */
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static int DetectSslVersionTestDetect01(void) {
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int result = 0;
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Flow f;
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uint8_t sslbuf1[] = { 0x16 };
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uint32_t ssllen1 = sizeof(sslbuf1);
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uint8_t sslbuf2[] = { 0x03 };
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uint32_t ssllen2 = sizeof(sslbuf2);
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uint8_t sslbuf3[] = { 0x01 };
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uint32_t ssllen3 = sizeof(sslbuf3);
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uint8_t sslbuf4[] = { 0x01, 0x00, 0x00, 0xad, 0x03, 0x01 };
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uint32_t ssllen4 = sizeof(sslbuf4);
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TcpSession ssn;
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Packet *p = NULL;
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Signature *s = NULL;
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ThreadVars th_v;
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DetectEngineThreadCtx *det_ctx = NULL;
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memset(&th_v, 0, sizeof(th_v));
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memset(&f, 0, sizeof(f));
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memset(&ssn, 0, sizeof(ssn));
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p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
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FLOW_INITIALIZE(&f);
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f.protoctx = (void *)&ssn;
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p->flow = &f;
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p->flowflags |= FLOW_PKT_TOSERVER;
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p->flowflags |= FLOW_PKT_ESTABLISHED;
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p->flags |= PKT_HAS_FLOW;
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f.alproto = ALPROTO_TLS;
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StreamTcpInitConfig(TRUE);
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FlowL7DataPtrInit(&f);
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DetectEngineCtx *de_ctx = DetectEngineCtxInit();
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if (de_ctx == NULL) {
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goto end;
|
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}
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|
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de_ctx->flags |= DE_QUIET;
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s = de_ctx->sig_list = SigInit(de_ctx,"alert tls any any -> any any (msg:\"TLS\"; ssl_version:tls1.0; sid:1;)");
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if (s == NULL) {
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goto end;
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}
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|
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SigGroupBuild(de_ctx);
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DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
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|
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int r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf1, ssllen1);
|
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if (r != 0) {
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printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
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goto end;
|
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}
|
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|
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r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf2, ssllen2);
|
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if (r != 0) {
|
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printf("toserver chunk 2 returned %" PRId32 ", expected 0: ", r);
|
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goto end;
|
||||
}
|
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|
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r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf3, ssllen3);
|
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if (r != 0) {
|
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printf("toserver chunk 3 returned %" PRId32 ", expected 0: ", r);
|
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goto end;
|
||||
}
|
||||
|
||||
r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf4, ssllen4);
|
||||
if (r != 0) {
|
||||
printf("toserver chunk 4 returned %" PRId32 ", expected 0: ", r);
|
||||
goto end;
|
||||
}
|
||||
|
||||
TlsState *app_state = f.aldata[AlpGetStateIdx(ALPROTO_TLS)];
|
||||
if (app_state == NULL) {
|
||||
printf("no ssl state: ");
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (app_state->client_content_type != 0x16) {
|
||||
printf("expected content_type %" PRIu8 ", got %" PRIu8 ": ", 0x16, app_state->client_content_type);
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (app_state->client_version != TLS_VERSION_10) {
|
||||
printf("expected version %04" PRIu16 ", got %04" PRIu16 ": ", TLS_VERSION_10, app_state->client_version);
|
||||
goto end;
|
||||
}
|
||||
|
||||
SCLogDebug("app_state is at %p, app_state->server_version 0x%02X app_state->client_version 0x%02X",
|
||||
app_state, app_state->server_version, app_state->client_version);
|
||||
|
||||
/* do detect */
|
||||
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
||||
|
||||
if (!(PacketAlertCheck(p, 1))) {
|
||||
goto end;
|
||||
}
|
||||
|
||||
result = 1;
|
||||
end:
|
||||
SigGroupCleanup(de_ctx);
|
||||
SigCleanSignatures(de_ctx);
|
||||
|
||||
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
|
||||
DetectEngineCtxFree(de_ctx);
|
||||
|
||||
FlowL7DataPtrFree(&f);
|
||||
StreamTcpFreeConfig(TRUE);
|
||||
FLOW_DESTROY(&f);
|
||||
|
||||
UTHFreePackets(&p, 1);
|
||||
return result;
|
||||
}
|
||||
|
||||
static int DetectSslVersionTestDetect02(void) {
|
||||
int result = 0;
|
||||
Flow f;
|
||||
uint8_t sslbuf1[] = { 0x16 };
|
||||
uint32_t ssllen1 = sizeof(sslbuf1);
|
||||
uint8_t sslbuf2[] = { 0x03 };
|
||||
uint32_t ssllen2 = sizeof(sslbuf2);
|
||||
uint8_t sslbuf3[] = { 0x01 };
|
||||
uint32_t ssllen3 = sizeof(sslbuf3);
|
||||
uint8_t sslbuf4[] = { 0x01, 0x00, 0x00, 0xad, 0x03, 0x02 };
|
||||
uint32_t ssllen4 = sizeof(sslbuf4);
|
||||
TcpSession ssn;
|
||||
Packet *p = NULL;
|
||||
Signature *s = NULL;
|
||||
ThreadVars th_v;
|
||||
DetectEngineThreadCtx *det_ctx = NULL;
|
||||
|
||||
memset(&th_v, 0, sizeof(th_v));
|
||||
memset(&f, 0, sizeof(f));
|
||||
memset(&ssn, 0, sizeof(ssn));
|
||||
|
||||
p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
|
||||
|
||||
FLOW_INITIALIZE(&f);
|
||||
f.protoctx = (void *)&ssn;
|
||||
p->flow = &f;
|
||||
p->flowflags |= FLOW_PKT_TOSERVER;
|
||||
p->flowflags |= FLOW_PKT_ESTABLISHED;
|
||||
p->flags |= PKT_HAS_FLOW;
|
||||
f.alproto = ALPROTO_TLS;
|
||||
|
||||
StreamTcpInitConfig(TRUE);
|
||||
FlowL7DataPtrInit(&f);
|
||||
|
||||
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
|
||||
if (de_ctx == NULL) {
|
||||
goto end;
|
||||
}
|
||||
|
||||
de_ctx->flags |= DE_QUIET;
|
||||
|
||||
s = de_ctx->sig_list = SigInit(de_ctx,"alert tls any any -> any any (msg:\"TLS\"; ssl_version:tls1.0; sid:1;)");
|
||||
if (s == NULL) {
|
||||
goto end;
|
||||
}
|
||||
|
||||
SigGroupBuild(de_ctx);
|
||||
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
|
||||
|
||||
int r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf1, ssllen1);
|
||||
if (r != 0) {
|
||||
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
|
||||
goto end;
|
||||
}
|
||||
|
||||
r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf2, ssllen2);
|
||||
if (r != 0) {
|
||||
printf("toserver chunk 2 returned %" PRId32 ", expected 0: ", r);
|
||||
goto end;
|
||||
}
|
||||
|
||||
r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf3, ssllen3);
|
||||
if (r != 0) {
|
||||
printf("toserver chunk 3 returned %" PRId32 ", expected 0: ", r);
|
||||
goto end;
|
||||
}
|
||||
|
||||
r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf4, ssllen4);
|
||||
if (r != 0) {
|
||||
printf("toserver chunk 4 returned %" PRId32 ", expected 0: ", r);
|
||||
goto end;
|
||||
}
|
||||
|
||||
TlsState *app_state = f.aldata[AlpGetStateIdx(ALPROTO_TLS)];
|
||||
if (app_state == NULL) {
|
||||
printf("no ssl state: ");
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (app_state->client_content_type != 0x16) {
|
||||
printf("expected content_type %" PRIu8 ", got %" PRIu8 ": ", 0x16, app_state->client_content_type);
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (app_state->client_version != TLS_VERSION_10) {
|
||||
printf("expected version %04" PRIu16 ", got %04" PRIu16 ": ", TLS_VERSION_10, app_state->client_version);
|
||||
goto end;
|
||||
}
|
||||
|
||||
/* do detect */
|
||||
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
||||
|
||||
if (!(PacketAlertCheck(p, 1))) {
|
||||
printf("signature 1 didn't match while it should have: ");
|
||||
goto end;
|
||||
}
|
||||
|
||||
result = 1;
|
||||
end:
|
||||
SigGroupCleanup(de_ctx);
|
||||
SigCleanSignatures(de_ctx);
|
||||
|
||||
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
|
||||
DetectEngineCtxFree(de_ctx);
|
||||
|
||||
FlowL7DataPtrFree(&f);
|
||||
StreamTcpFreeConfig(TRUE);
|
||||
FLOW_DESTROY(&f);
|
||||
|
||||
UTHFreePackets(&p, 1);
|
||||
return result;
|
||||
}
|
||||
|
||||
static int DetectSslVersionTestDetect03(void) {
|
||||
DetectEngineCtx *de_ctx = NULL;
|
||||
int result = 0;
|
||||
Flow f;
|
||||
uint8_t sslbuf1[] = { 0x16 };
|
||||
uint32_t ssllen1 = sizeof(sslbuf1);
|
||||
uint8_t sslbuf2[] = { 0x03 };
|
||||
uint32_t ssllen2 = sizeof(sslbuf2);
|
||||
uint8_t sslbuf3[] = { 0x01 };
|
||||
uint32_t ssllen3 = sizeof(sslbuf3);
|
||||
uint8_t sslbuf4[] = { 0x01, 0x00, 0x00, 0xad, 0x03, 0x02 };
|
||||
uint32_t ssllen4 = sizeof(sslbuf4);
|
||||
TcpSession ssn;
|
||||
Packet *p = NULL;
|
||||
Signature *s = NULL;
|
||||
ThreadVars th_v;
|
||||
DetectEngineThreadCtx *det_ctx = NULL;
|
||||
|
||||
memset(&th_v, 0, sizeof(th_v));
|
||||
memset(&f, 0, sizeof(f));
|
||||
memset(&ssn, 0, sizeof(ssn));
|
||||
|
||||
p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
|
||||
p->tcph->th_seq = htonl(1000);
|
||||
|
||||
FLOW_INITIALIZE(&f);
|
||||
f.protoctx = (void *)&ssn;
|
||||
p->flow = &f;
|
||||
p->flowflags |= FLOW_PKT_TOSERVER;
|
||||
p->flowflags |= FLOW_PKT_ESTABLISHED;
|
||||
p->flags |= PKT_HAS_FLOW;
|
||||
f.alproto = ALPROTO_TLS;
|
||||
f.proto = p->proto;
|
||||
|
||||
StreamTcpInitConfig(TRUE);
|
||||
FlowL7DataPtrInit(&f);
|
||||
|
||||
StreamMsg *stream_msg = StreamMsgGetFromPool();
|
||||
if (stream_msg == NULL) {
|
||||
printf("no stream_msg: ");
|
||||
goto end;
|
||||
}
|
||||
|
||||
memcpy(stream_msg->data.data, sslbuf4, ssllen4);
|
||||
stream_msg->data.data_len = ssllen4;
|
||||
|
||||
ssn.toserver_smsg_head = stream_msg;
|
||||
ssn.toserver_smsg_tail = stream_msg;
|
||||
|
||||
de_ctx = DetectEngineCtxInit();
|
||||
if (de_ctx == NULL) {
|
||||
goto end;
|
||||
}
|
||||
|
||||
de_ctx->flags |= DE_QUIET;
|
||||
|
||||
s = de_ctx->sig_list = SigInit(de_ctx,"alert tcp any any -> any any (msg:\"TLS\"; ssl_version:tls1.0; content:\"|01 00 00 AD|\"; sid:1;)");
|
||||
if (s == NULL) {
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (s->flags & SIG_FLAG_PACKET) {
|
||||
SCLogDebug("SIG_FLAG_PACKET flags");
|
||||
}
|
||||
|
||||
SigGroupBuild(de_ctx);
|
||||
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
|
||||
|
||||
int r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf1, ssllen1);
|
||||
if (r != 0) {
|
||||
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
|
||||
goto end;
|
||||
}
|
||||
|
||||
r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf2, ssllen2);
|
||||
if (r != 0) {
|
||||
printf("toserver chunk 2 returned %" PRId32 ", expected 0: ", r);
|
||||
goto end;
|
||||
}
|
||||
|
||||
r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf3, ssllen3);
|
||||
if (r != 0) {
|
||||
printf("toserver chunk 3 returned %" PRId32 ", expected 0: ", r);
|
||||
goto end;
|
||||
}
|
||||
|
||||
r = AppLayerParse(&f, ALPROTO_TLS, STREAM_TOSERVER, sslbuf4, ssllen4);
|
||||
if (r != 0) {
|
||||
printf("toserver chunk 4 returned %" PRId32 ", expected 0: ", r);
|
||||
goto end;
|
||||
}
|
||||
|
||||
TlsState *app_state = f.aldata[AlpGetStateIdx(ALPROTO_TLS)];
|
||||
if (app_state == NULL) {
|
||||
printf("no ssl state: ");
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (app_state->client_content_type != 0x16) {
|
||||
printf("expected content_type %" PRIu8 ", got %" PRIu8 ": ", 0x16, app_state->client_content_type);
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (app_state->client_version != TLS_VERSION_10) {
|
||||
printf("expected version %04" PRIu16 ", got %04" PRIu16 ": ", TLS_VERSION_10, app_state->client_version);
|
||||
goto end;
|
||||
}
|
||||
|
||||
/* do detect */
|
||||
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
|
||||
|
||||
if (!(PacketAlertCheck(p, 1))) {
|
||||
printf("signature 1 didn't match while it should have: ");
|
||||
goto end;
|
||||
}
|
||||
|
||||
result = 1;
|
||||
end:
|
||||
if (de_ctx != NULL) {
|
||||
SigGroupCleanup(de_ctx);
|
||||
SigCleanSignatures(de_ctx);
|
||||
DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
|
||||
DetectEngineCtxFree(de_ctx);
|
||||
}
|
||||
|
||||
FlowL7DataPtrFree(&f);
|
||||
StreamTcpFreeConfig(TRUE);
|
||||
FLOW_DESTROY(&f);
|
||||
UTHFreePackets(&p, 1);
|
||||
return result;
|
||||
}
|
||||
|
||||
#endif /* UNITTESTS */
|
||||
|
||||
/**
|
||||
* \brief this function registers unit tests for DetectSslVersion
|
||||
*/
|
||||
void DetectSslVersionRegisterTests(void) {
|
||||
#ifdef UNITTESTS /* UNITTESTS */
|
||||
UtRegisterTest("DetectSslVersionTestParse01", DetectSslVersionTestParse01, 1);
|
||||
UtRegisterTest("DetectSslVersionTestParse02", DetectSslVersionTestParse02, 1);
|
||||
UtRegisterTest("DetectSslVersionTestParse03", DetectSslVersionTestParse03, 1);
|
||||
UtRegisterTest("DetectSslVersionTestDetect01", DetectSslVersionTestDetect01, 1);
|
||||
UtRegisterTest("DetectSslVersionTestDetect02", DetectSslVersionTestDetect02, 1);
|
||||
UtRegisterTest("DetectSslVersionTestDetect03", DetectSslVersionTestDetect03, 1);
|
||||
#endif /* UNITTESTS */
|
||||
}
|
||||
@ -0,0 +1,48 @@
|
||||
/* 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 detect-ssl-version.h
|
||||
*
|
||||
* \author Gurvinder Singh <gurvindersinghdahiya@gmail.com>
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef DETECT_SSL_VERSION_H
|
||||
#define DETECT_SSL_VERSION_H
|
||||
|
||||
#define DETECT_SSL_VERSION_NEGATED 0x01
|
||||
|
||||
#define SSLv2 0
|
||||
#define SSLv3 1
|
||||
#define TLS10 2
|
||||
#define TLS11 3
|
||||
#define TLS12 4
|
||||
|
||||
typedef struct SSLVersionData_ {
|
||||
uint16_t ver; /** ssl version to match */
|
||||
uint8_t flags;
|
||||
}SSLVersionData;
|
||||
|
||||
typedef struct DetectSslVersionData_ {
|
||||
SSLVersionData data[5];
|
||||
} DetectSslVersionData;
|
||||
|
||||
/* prototypes */
|
||||
void DetectSslVersionRegister (void);
|
||||
|
||||
#endif /* DETECT_SSL_VERSION_H */
|
||||
Loading…
Reference in New Issue