56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2016 Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "crypto.h"
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#include "misc.h"
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static enum crypto_method_t g_cur_method = CRYPTO_NONE;
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static byte g_key[16];
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int crypto_setup(struct crypto_key_t *key)
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{
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g_cur_method = key->method;
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switch(g_cur_method)
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{
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case CRYPTO_KEY:
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memcpy(g_key, key->u.key, 16);
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return CRYPTO_ERROR_SUCCESS;
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default:
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return CRYPTO_ERROR_BADSETUP;
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}
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}
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int crypto_apply(
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byte *in_data, /* Input data */
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byte *out_data, /* Output data (or NULL) */
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int nr_blocks, /* Number of blocks (one block=16 bytes) */
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byte iv[16], /* Key */
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byte (*out_cbc_mac)[16], /* CBC-MAC of the result (or NULL) */
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bool encrypt)
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{
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if(g_cur_method == CRYPTO_KEY)
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{
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cbc_mac(in_data, out_data, nr_blocks, g_key, iv, out_cbc_mac, encrypt);
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return CRYPTO_ERROR_SUCCESS;
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}
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else
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return CRYPTO_ERROR_BADSETUP;
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}
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