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/* Copyright (C) 2020 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 Vadym Malakhatko <v.malakhatko@sirinsoftware.com>
*
*/
#include "suricata-common.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"
#include "util-lua-hassh.h"
static int GetHasshServerString(lua_State *luastate, const Flow *f)
{
void *state = FlowGetAppState(f);
if (state == NULL)
return LuaCallbackError(luastate, "error: no app layer state");
const uint8_t *hassh_server_string = NULL;
uint32_t b_len = 0;
void *tx = rs_ssh_state_get_tx(state, 0);
if (rs_ssh_tx_get_hassh_string(tx, &hassh_server_string, &b_len, STREAM_TOCLIENT) != 1)
return LuaCallbackError(luastate, "error: no server hassh string");
if (hassh_server_string == NULL || b_len == 0) {
return LuaCallbackError(luastate, "error: no server hassh string");
}
return LuaPushStringBuffer(luastate, hassh_server_string, b_len);
}
static int HasshServerGetString(lua_State *luastate)
{
int r;
if (!(LuaStateNeedProto(luastate, ALPROTO_SSH)))
return LuaCallbackError(luastate, "error: protocol is not ssh");
Flow *f = LuaStateGetFlow(luastate);
if (f == NULL)
return LuaCallbackError(luastate, "internal error: no ssh flow");
r = GetHasshServerString(luastate, f);
return r;
}
static int GetHasshServer(lua_State *luastate, const Flow *f)
{
void *state = FlowGetAppState(f);
if (state == NULL)
return LuaCallbackError(luastate, "error: no ssh app layer state");
const uint8_t *hassh_server = NULL;
uint32_t b_len = 0;
void *tx = rs_ssh_state_get_tx(state, 0);
if (rs_ssh_tx_get_hassh(tx, &hassh_server, &b_len, STREAM_TOCLIENT) != 1)
return LuaCallbackError(luastate, "error: no server hassh");
if (hassh_server == NULL || b_len == 0) {
return LuaCallbackError(luastate, "error: no server hassh");
}
return LuaPushStringBuffer(luastate, hassh_server, b_len);
}
static int HasshServerGet(lua_State *luastate)
{
int r;
if (!(LuaStateNeedProto(luastate, ALPROTO_SSH)))
return LuaCallbackError(luastate, "error: protocol is not ssh");
Flow *f = LuaStateGetFlow(luastate);
if (f == NULL)
return LuaCallbackError(luastate, "internal error: no ssh flow");
r = GetHasshServer(luastate, f);
return r;
}
static int GetHasshString(lua_State *luastate, const Flow *f)
{
void *state = FlowGetAppState(f);
if (state == NULL)
return LuaCallbackError(luastate, "error: no app layer state");
const uint8_t *hassh_string = NULL;
uint32_t b_len = 0;
void *tx = rs_ssh_state_get_tx(state, 0);
if (rs_ssh_tx_get_hassh_string(tx, &hassh_string, &b_len, STREAM_TOSERVER) != 1)
return LuaCallbackError(luastate, "error: no client hassh_string");
if (hassh_string == NULL || b_len == 0) {
return LuaCallbackError(luastate, "error: no client hassh_string");
}
return LuaPushStringBuffer(luastate, hassh_string, b_len);
}
static int HasshGetString(lua_State *luastate)
{
int r;
if (!(LuaStateNeedProto(luastate, ALPROTO_SSH)))
return LuaCallbackError(luastate, "error: protocol is not ssh");
Flow *f = LuaStateGetFlow(luastate);
if (f == NULL)
return LuaCallbackError(luastate, "internal error: no ssh flow");
r = GetHasshString(luastate, f);
return r;
}
static int GetHassh(lua_State *luastate, const Flow *f)
{
void *state = FlowGetAppState(f);
if (state == NULL)
return LuaCallbackError(luastate, "error: no app layer state");
const uint8_t *hassh = NULL;
uint32_t b_len = 0;
void *tx = rs_ssh_state_get_tx(state, 0);
if (rs_ssh_tx_get_hassh(tx, &hassh, &b_len, STREAM_TOSERVER) != 1)
return LuaCallbackError(luastate, "error: no client hassh");
if (hassh == NULL || b_len == 0) {
return LuaCallbackError(luastate, "error: no client hassh");
}
return LuaPushStringBuffer(luastate, hassh, b_len);
}
static int HasshGet(lua_State *luastate)
{
int r;
if (!(LuaStateNeedProto(luastate, ALPROTO_SSH)))
return LuaCallbackError(luastate, "error: protocol is not ssh");
Flow *f = LuaStateGetFlow(luastate);
if (f == NULL)
return LuaCallbackError(luastate, "internal error: no sshflow");
r = GetHassh(luastate, f);
return r;
}
/** *\brief Register Hassh Lua extensions */
int LuaRegisterHasshFunctions(lua_State *luastate)
{
lua_pushcfunction(luastate, HasshGet);
lua_setglobal(luastate, "HasshGet");
lua_pushcfunction(luastate, HasshGetString);
lua_setglobal(luastate, "HasshGetString");
lua_pushcfunction(luastate, HasshServerGet);
lua_setglobal(luastate, "HasshServerGet");
lua_pushcfunction(luastate, HasshServerGetString);
lua_setglobal(luastate, "HasshServerGetString");
return 0;
}
#endif /* HAVE_LUA */
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