mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-11-22 14:45:40 +01:00
107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/*
|
|
* NIST SP800-38C compliant CCM implementation
|
|
*
|
|
* Copyright (C) 2014, Brainspark B.V.
|
|
*
|
|
* This file is part of PolarSSL (http://www.polarssl.org)
|
|
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* This program 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 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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 along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
/*
|
|
* Definition of CCM:
|
|
* http://csrc.nist.gov/publications/nistpubs/800-38C/SP800-38C_updated-July20_2007.pdf
|
|
* RFC 3610 "Counter with CBC-MAC (CCM)"
|
|
*
|
|
* Related:
|
|
* RFC 5116 "An Interface and Algorithms for Authenticated Encryption"
|
|
*/
|
|
|
|
#if !defined(POLARSSL_CONFIG_FILE)
|
|
#include "polarssl/config.h"
|
|
#else
|
|
#include POLARSSL_CONFIG_FILE
|
|
#endif
|
|
|
|
#if defined(POLARSSL_CCM_C)
|
|
|
|
#include "polarssl/ccm.h"
|
|
|
|
/*
|
|
* Initialize context
|
|
*/
|
|
int ccm_init( ccm_context *ctx, cipher_id_t cipher,
|
|
const unsigned char *key, unsigned int keysize )
|
|
{
|
|
int ret;
|
|
const cipher_info_t *cipher_info;
|
|
|
|
memset( ctx, 0, sizeof( ccm_context ) );
|
|
|
|
cipher_info = cipher_info_from_values( cipher, keysize, POLARSSL_MODE_ECB );
|
|
if( cipher_info == NULL )
|
|
return( POLARSSL_ERR_CCM_BAD_INPUT );
|
|
|
|
if( cipher_info->block_size != 16 )
|
|
return( POLARSSL_ERR_CCM_BAD_INPUT );
|
|
|
|
if( ( ret = cipher_init_ctx( &ctx->cipher_ctx, cipher_info ) ) != 0 )
|
|
return( ret );
|
|
|
|
if( ( ret = cipher_setkey( &ctx->cipher_ctx, key, keysize,
|
|
POLARSSL_ENCRYPT ) ) != 0 )
|
|
{
|
|
return( ret );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* Free context
|
|
*/
|
|
void ccm_free( ccm_context *ctx )
|
|
{
|
|
(void) cipher_free_ctx( &ctx->cipher_ctx );
|
|
memset( ctx, 0, sizeof( ccm_context ) );
|
|
}
|
|
|
|
|
|
#if defined(POLARSSL_SELF_TEST) && defined(POLARSSL_AES_C)
|
|
|
|
#if defined(POLARSSL_PLATFORM_C)
|
|
#include "polarssl/platform.h"
|
|
#else
|
|
#define polarssl_printf printf
|
|
#endif
|
|
|
|
int ccm_self_test( int verbose )
|
|
{
|
|
if( verbose != 0 )
|
|
polarssl_printf( " CCM: skip\n" );
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( "\n" );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
#endif /* POLARSSL_SELF_TEST && POLARSSL_AES_C */
|
|
|
|
#endif /* POLARSSL_CCM_C */
|