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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 Mats Klepsland <mats.klepsland@gmail.com>
*
*/
#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-ssh.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 GetServerProtoVersion(lua_State *luastate, const Flow *f)
{
void *state = FlowGetAppState(f);
if (state == NULL)
return LuaCallbackError(luastate, "error: no app layer state");
SshState *ssh_state = (SshState *)state;
if (ssh_state->srv_hdr.proto_version == NULL)
return LuaCallbackError(luastate, "error: no server proto version");
return LuaPushStringBuffer(luastate, ssh_state->srv_hdr.proto_version,
strlen((char *)ssh_state->srv_hdr.proto_version));
}
static int SshGetServerProtoVersion(lua_State *luastate)
{
int r;
if (!(LuaStateNeedProto(luastate, ALPROTO_SSH)))
return LuaCallbackError(luastate, "error: protocol not ssh");
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 = GetServerProtoVersion(luastate, f);
FLOWLOCK_UNLOCK(f);
} else {
r = GetServerProtoVersion(luastate, f);
}
return r;
}
static int GetServerSoftwareVersion(lua_State *luastate, const Flow *f)
{
void *state = FlowGetAppState(f);
if (state == NULL)
return LuaCallbackError(luastate, "error: no app layer state");
SshState *ssh_state = (SshState *)state;
if (ssh_state->srv_hdr.software_version == NULL)
return LuaCallbackError(luastate, "error: no server software version");
return LuaPushStringBuffer(luastate, ssh_state->srv_hdr.software_version,
strlen((char *)ssh_state->srv_hdr.software_version));
}
static int SshGetServerSoftwareVersion(lua_State *luastate)
{
int r;
if (!(LuaStateNeedProto(luastate, ALPROTO_SSH)))
return LuaCallbackError(luastate, "error: protocol not ssh");
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 = GetServerSoftwareVersion(luastate, f);
FLOWLOCK_UNLOCK(f);
} else {
r = GetServerSoftwareVersion(luastate, f);
}
return r;
}
static int GetClientProtoVersion(lua_State *luastate, const Flow *f)
{
void *state = FlowGetAppState(f);
if (state == NULL)
return LuaCallbackError(luastate, "error: no app layer state");
SshState *ssh_state = (SshState *)state;
if (ssh_state->cli_hdr.proto_version == NULL)
return LuaCallbackError(luastate, "error: no client proto version");
return LuaPushStringBuffer(luastate, ssh_state->cli_hdr.proto_version,
strlen((char *)ssh_state->cli_hdr.proto_version));
}
static int SshGetClientProtoVersion(lua_State *luastate)
{
int r;
if (!(LuaStateNeedProto(luastate, ALPROTO_SSH)))
return LuaCallbackError(luastate, "error: protocol not ssh");
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 = GetClientProtoVersion(luastate, f);
FLOWLOCK_UNLOCK(f);
} else {
r = GetClientProtoVersion(luastate, f);
}
return r;
}
static int GetClientSoftwareVersion(lua_State *luastate, const Flow *f)
{
void *state = FlowGetAppState(f);
if (state == NULL)
return LuaCallbackError(luastate, "error: no app layer state");
SshState *ssh_state = (SshState *)state;
if (ssh_state->cli_hdr.software_version == NULL)
return LuaCallbackError(luastate, "error: no client software version");
return LuaPushStringBuffer(luastate, ssh_state->cli_hdr.software_version,
strlen((char *)ssh_state->cli_hdr.software_version));
}
static int SshGetClientSoftwareVersion(lua_State *luastate)
{
int r;
if (!(LuaStateNeedProto(luastate, ALPROTO_SSH)))
return LuaCallbackError(luastate, "error: protocol not ssh");
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 = GetClientSoftwareVersion(luastate, f);
FLOWLOCK_UNLOCK(f);
} else {
r = GetClientSoftwareVersion(luastate, f);
}
return r;
}
/** \brief register ssh lua extensions in a luastate */
int LuaRegisterSshFunctions(lua_State *luastate)
{
/* registration of the callbacks */
lua_pushcfunction(luastate, SshGetServerProtoVersion);
lua_setglobal(luastate, "SshGetServerProtoVersion");
lua_pushcfunction(luastate, SshGetServerSoftwareVersion);
lua_setglobal(luastate, "SshGetServerSoftwareVersion");
lua_pushcfunction(luastate, SshGetClientProtoVersion);
lua_setglobal(luastate, "SshGetClientProtoVersion");
lua_pushcfunction(luastate, SshGetClientSoftwareVersion);
lua_setglobal(luastate, "SshGetClientSoftwareVersion");
return 0;
}
#endif /* HAVE_LUA */
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