759a78e5df
The current implementation was custom and super slow. Since we use Crypto++ anyway, we might as well get use a good implementation. Change-Id: I761ad7401653471e54000e1c2bc3d9882378112f
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/***************************************************************************
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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) 2010 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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#ifndef __CRYPTO_H__
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#define __CRYPTO_H__
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef uint8_t byte;
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/* crypto.c */
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enum crypto_method_t
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{
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CRYPTO_NONE, /* disable */
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CRYPTO_KEY, /* key */
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CRYPTO_XOR_KEY, /* XOR key */
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};
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union xorcrypt_key_t
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{
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uint8_t key[64];
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uint32_t k[16];
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};
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/* all-in-one function */
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struct crypto_key_t
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{
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enum crypto_method_t method;
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union
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{
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byte key[16];
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union xorcrypt_key_t xor_key[2];
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}u;
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};
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#define CRYPTO_ERROR_SUCCESS 0
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#define CRYPTO_ERROR_BADSETUP -1
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#define CRYPTO_ERROR_INVALID_OP -2
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/* parameter can be:
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* - CRYPTO_KEY: array of 16-bytes (the key)
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* return 0 on success, <0 on error */
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int crypto_setup(struct crypto_key_t *key);
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/* return 0 on success, <0 on error */
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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], /* IV */
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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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/* crc.c */
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uint32_t crc(byte *data, int size);
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uint32_t crc_continue(uint32_t previous_crc, byte *data, int size);
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/* sha1.c */
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struct sha_1_params_t
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{
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byte hash[20]; /* final hash */
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void *object; /* pointer to CryptoPP::SHA1 object */
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};
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void sha_1_init(struct sha_1_params_t *params);
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void sha_1_update(struct sha_1_params_t *params, byte *buffer, int size);
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void sha_1_finish(struct sha_1_params_t *params);
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void sha_1_output(struct sha_1_params_t *params, byte *out);
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/* xorcrypt.c */
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// WARNING those functions modifies the keys !!
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uint32_t xor_encrypt(union xorcrypt_key_t keys[2], void *data, int size);
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uint32_t xor_decrypt(union xorcrypt_key_t keys[2], void *data, int size);
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void xor_generate_key(uint32_t laserfuse[3], union xorcrypt_key_t key[2]);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __CRYPTO_H__ */
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