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/* Copyright (C) 2014 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 Eric Leblond <eric@regit.org>
*
*/
#include "suricata-common.h"
#include "debug.h"
#include "detect.h"
#include "pkt-var.h"
#include "conf.h"
#include "threads.h"
#include "threadvars.h"
#include "tm-threads.h"
#include "util-print.h"
#include "util-unittest.h"
#include "util-debug.h"
#include "output.h"
#include "app-layer.h"
#include "app-layer-parser.h"
#include "app-layer-ssl.h"
#include "util-privs.h"
#include "util-buffer.h"
#include "util-proto-name.h"
#include "util-logopenfile.h"
#include "util-time.h"
#ifdef HAVE_LUA
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
#include "util-lua.h"
#include "util-lua-common.h"
static int GetCertInfo(lua_State *luastate, const Flow *f, int direction)
{
void *state = FlowGetAppState(f);
if (state == NULL)
return LuaCallbackError(luastate, "error: no app layer state");
SSLState *ssl_state = (SSLState *)state;
SSLStateConnp *connp = NULL;
if (direction) {
connp = &ssl_state->client_connp;
} else {
connp = &ssl_state->server_connp;
}
if (connp->cert0_subject == NULL)
return LuaCallbackError(luastate, "error: no cert");
/* tls.version */
char ssl_version[32] = "";
switch (ssl_state->server_connp.version) {
case TLS_VERSION_UNKNOWN:
snprintf(ssl_version, sizeof(ssl_version), "UNDETERMINED");
break;
case SSL_VERSION_2:
snprintf(ssl_version, sizeof(ssl_version), "SSLv2");
break;
case SSL_VERSION_3:
snprintf(ssl_version, sizeof(ssl_version), "SSLv3");
break;
case TLS_VERSION_10:
snprintf(ssl_version, sizeof(ssl_version), "TLSv1");
break;
case TLS_VERSION_11:
snprintf(ssl_version, sizeof(ssl_version), "TLS 1.1");
break;
case TLS_VERSION_12:
snprintf(ssl_version, sizeof(ssl_version), "TLS 1.2");
break;
default:
snprintf(ssl_version, sizeof(ssl_version), "0x%04x",
ssl_state->server_connp.version);
break;
}
int r = LuaPushStringBuffer(luastate, (uint8_t *)ssl_version, strlen(ssl_version));
r += LuaPushStringBuffer(luastate, (uint8_t *)connp->cert0_subject, strlen(connp->cert0_subject));
r += LuaPushStringBuffer(luastate, (uint8_t *)connp->cert0_issuerdn, strlen(connp->cert0_issuerdn));
r += LuaPushStringBuffer(luastate, (uint8_t *)connp->cert0_fingerprint, strlen(connp->cert0_fingerprint));
return r;
}
static int TlsGetCertInfo(lua_State *luastate)
{
int r;
if (!(LuaStateNeedProto(luastate, ALPROTO_TLS)))
return LuaCallbackError(luastate, "error: protocol not tls");
int direction = LuaStateGetDirection(luastate);
int lock_hint = 0;
Flow *f = LuaStateGetFlow(luastate, &lock_hint);
if (f == NULL)
return LuaCallbackError(luastate, "internal error: no flow");
if (lock_hint == LUA_FLOW_NOT_LOCKED_BY_PARENT) {
FLOWLOCK_RDLOCK(f);
r = GetCertInfo(luastate, f, direction);
FLOWLOCK_UNLOCK(f);
} else {
r = GetCertInfo(luastate, f, direction);
}
return r;
}
/** \brief register tls lua extensions in a luastate */
int LuaRegisterTlsFunctions(lua_State *luastate)
{
/* registration of the callbacks */
lua_pushcfunction(luastate, TlsGetCertInfo);
lua_setglobal(luastate, "TlsGetCertInfo");
return 0;
}
#endif /* HAVE_LUA */
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