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/**********************************************************************
*
* This file is part of Cardpeek, the smart card reader utility.
*
* Copyright 2009-2013 by Alain Pannetrat <L1L1@gmx.com>
*
* Cardpeek is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Cardpeek 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
* along with Cardpeek. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <lauxlib.h>
#include "lua_crypto.h"
#include "crypto.h"
#include "lua_bytes.h"
/***********************************************************
* BASIC CRYPTO FUNCTIONS
*/
static int subr_crypto_create_context(lua_State* L)
{
int alg = luaL_checkinteger(L,1);
bytestring_t* bs;
bytestring_t* res = bytestring_new(8);
crypto_error_t e;
if (lua_isnoneornil(L,2))
bs = NULL;
else
bs = luaL_check_bytestring(L,2);
if ((e=crypto_create_context(res,alg,bs))==CRYPTO_OK)
lua_push_bytestring(L,res);
else
{
bytestring_free(res);
return luaL_error(L,crypto_stringify_error(e));
}
return 1;
}
static int subr_crypto_encrypt(lua_State* L)
{
bytestring_t* ctx = luaL_check_bytestring(L,1);
bytestring_t* src = luaL_check_bytestring(L,2);
bytestring_t* iv;
bytestring_t* res = bytestring_new(8);
crypto_error_t e;
if (lua_isnoneornil(L,3))
iv = NULL;
else
iv = luaL_check_bytestring(L,3);
if ((e=crypto_encrypt(res,ctx,src,iv))==CRYPTO_OK)
lua_push_bytestring(L,res);
else
{
bytestring_free(res);
return luaL_error(L,crypto_stringify_error(e));
}
return 1;
}
static int subr_crypto_decrypt(lua_State* L)
{
bytestring_t* ctx = luaL_check_bytestring(L,1);
bytestring_t* src = luaL_check_bytestring(L,2);
bytestring_t* iv;
bytestring_t* res = bytestring_new(8);
crypto_error_t e;
if (lua_isnoneornil(L,3))
iv = NULL;
else
iv = luaL_check_bytestring(L,3);
if ((e=crypto_decrypt(res,ctx,src,iv))==CRYPTO_OK)
lua_push_bytestring(L,res);
else
{
bytestring_free(res);
return luaL_error(L,crypto_stringify_error(e));
}
return 1;
}
static int subr_crypto_mac(lua_State* L)
{
bytestring_t* ctx = luaL_check_bytestring(L,1);
bytestring_t* src = luaL_check_bytestring(L,2);
bytestring_t* res = bytestring_new(8);
crypto_error_t e;
if ((e=crypto_mac(res,ctx,src))==CRYPTO_OK)
lua_push_bytestring(L,res);
else
{
bytestring_free(res);
return luaL_error(L,crypto_stringify_error(e));
}
return 1;
}
static int subr_crypto_digest(lua_State* L)
{
bytestring_t* ctx = luaL_check_bytestring(L,1);
bytestring_t* src = luaL_check_bytestring(L,2);
bytestring_t* res = bytestring_new(8);
crypto_error_t e;
if ((e=crypto_digest(res,ctx,src))==CRYPTO_OK)
lua_push_bytestring(L,res);
else
{
bytestring_free(res);
return luaL_error(L,crypto_stringify_error(e));
}
return 1;
}
static const struct luaL_Reg cryptolib [] = {
{ "create_context", subr_crypto_create_context },
{ "encrypt", subr_crypto_encrypt },
{ "decrypt", subr_crypto_decrypt },
{ "mac", subr_crypto_mac },
{ "digest", subr_crypto_digest },
{ NULL, NULL} /* sentinel */
};
struct luaL_reg_integer {
const char* name;
int value;
};
static const struct luaL_reg_integer cryptoconstants [] = {
{ "ALG_DES_ECB", CRYPTO_ALG_DES_ECB },
{ "ALG_DES_CBC", CRYPTO_ALG_DES_CBC },
{ "ALG_DES2_EDE_ECB", CRYPTO_ALG_DES2_EDE_ECB },
{ "ALG_DES2_EDE_CBC", CRYPTO_ALG_DES2_EDE_CBC },
{ "ALG_ISO9797_M3", CRYPTO_ALG_ISO9797_M3 },
{ "ALG_SHA1", CRYPTO_ALG_SHA1 },
{ "PAD_ZERO", CRYPTO_PAD_ZERO },
{ "PAD_OPT_80_ZERO", CRYPTO_PAD_OPT_80_ZERO },
{ "PAD_ISO9797_P2", CRYPTO_PAD_ISO9797_P2 },
{ NULL, 0} /* sentinel */
};
int luaopen_crypto(lua_State* L)
{
int i;
luaL_newlib(L,cryptolib);
for (i=0;cryptoconstants[i].name;i++)
{
lua_pushstring (L, cryptoconstants[i].name);
lua_pushinteger(L, cryptoconstants[i].value);
lua_settable(L,-3);
}
lua_setglobal(L,"crypto");
return 1;
}
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