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/*
* AES de/encryption context functions
*
* Copyright (C) 2011-2014, Joachim Metz <joachim.metz@gmail.com>
*
* Refer to AUTHORS for acknowledgements.
*
* This software is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This software 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 Lesser General Public License
* along with this software. If not, see <http://www.gnu.org/licenses/>.
*/
#if !defined( _LIBCAES_CONTEXT_H )
#define _LIBCAES_CONTEXT_H
#include <common.h>
#include <types.h>
#if defined( WINAPI )
#include <wincrypt.h>
#elif defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_AES_H )
#include <openssl/aes.h>
#elif defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_EVP_H )
#include <openssl/evp.h>
#endif
#include "libcaes_extern.h"
#include "libcaes_libcerror.h"
#include "libcaes_types.h"
#if defined( __cplusplus )
extern "C" {
#endif
typedef struct libcaes_internal_context libcaes_internal_context_t;
struct libcaes_internal_context
{
#if defined( WINAPI ) && ( WINVER >= 0x0600 )
/* The crypto provider handle
*/
HCRYPTPROV crypt_provider;
/* The crypto key handle
*/
HCRYPTKEY key;
#elif defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_AES_H )
/* The AES key
*/
AES_KEY key;
#elif defined( HAVE_LIBCRYPTO ) && defined( HAVE_OPENSSL_EVP_H )
/* The EVP context
*/
EVP_CIPHER_CTX evp_context;
/* The key
*/
uint8_t key[ 32 ];
/* The key bit size
*/
size_t key_bit_size;
#else
/* The number of round keys
*/
uint8_t number_of_round_keys;
/* The round keys
*/
uint32_t *round_keys;
/* The round keys data
*/
uint32_t round_keys_data[ 68 ];
#endif
};
LIBCAES_EXTERN \
int libcaes_context_initialize(
libcaes_context_t **context,
libcerror_error_t **error );
LIBCAES_EXTERN \
int libcaes_context_free(
libcaes_context_t **context,
libcerror_error_t **error );
LIBCAES_EXTERN \
int libcaes_context_set_key(
libcaes_context_t *context,
int mode,
const uint8_t *key,
size_t key_bit_size,
libcerror_error_t **error );
#ifdef __cplusplus
}
#endif
#endif
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