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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2010 Amaury Pouly
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef __CRYPTO_H__
#define __CRYPTO_H__
#include <stdio.h>
#include <stdint.h>
#include <string.h>
typedef uint8_t byte;
/* aes128.c */
void xor_(byte *a, byte *b, int n);
void EncryptAES(byte *msg, byte *key, byte *c);
void DecryptAES(byte *c, byte *key, byte *m);
void Pretty(byte* b,int len,const char* label);
void cbc_mac(
byte *in_data, /* Input data */
byte *out_data, /* Output data (or NULL) */
int nr_blocks, /* Number of blocks to encrypt/decrypt (one block=16 bytes) */
byte key[16], /* Key */
byte iv[16], /* Initialisation Vector */
byte (*out_cbc_mac)[16], /* CBC-MAC of the result (or NULL) */
int encrypt /* 1 to encrypt, 0 to decrypt */
);
/* crypto.c */
enum crypto_method_t
{
CRYPTO_NONE, /* disable */
CRYPTO_KEY, /* key */
CRYPTO_USBOTP, /* use usbotp device */
};
/* parameter can be:
* - CRYPTO_KEY: array of 16-bytes (the key)
* - CRYPTO_USBOTP: 32-bit integer: vid << 16 | pid */
void crypto_setup(enum crypto_method_t method, void *param);
#define CRYPTO_ERROR_SUCCESS 0
#define CRYPTO_ERROR_BADSETUP -1 /* bad crypto setup */
#define CRYPTO_ERROR_NODEVICE -2 /* no device with vid:pid */
#define CRYPTO_ERROR_BADENDP -3 /* device doesn't have the required endpoints */
#define CRYPTO_ERROR_CLAIMFAIL -4 /* device interface claim error */
#define CRYPTO_ERROR_DEVREJECT -5 /* device rejected cypto operation */
#define CRYPTO_ERROR_DEVSILENT -6 /* device did not notify completion */
#define CRYPTO_ERROR_DEVERR -7 /* device did something wrong (like return too small buffer) */
/* return 0 on success, <0 on error */
int crypto_apply(
byte *in_data, /* Input data */
byte *out_data, /* Output data (or NULL) */
int nr_blocks, /* Number of blocks (one block=16 bytes) */
byte iv[16], /* IV */
byte (*out_cbc_mac)[16], /* CBC-MAC of the result (or NULL) */
int encrypt);
/* all-in-one function */
struct crypto_key_t
{
enum crypto_method_t method;
union
{
byte key[16];
uint32_t vid_pid;
byte param[0];
}u;
};
int crypto_cbc(
byte *in_data, /* Input data */
byte *out_data, /* Output data (or NULL) */
int nr_blocks, /* Number of blocks (one block=16 bytes) */
struct crypto_key_t *key, /* Key */
byte iv[16], /* IV */
byte (*out_cbc_mac)[16], /* CBC-MAC of the result (or NULL) */
int encrypt);
/* crc.c */
uint32_t crc(byte *data, int size);
uint32_t crc_continue(uint32_t previous_crc, byte *data, int size);
/* sha1.c */
struct sha_1_params_t
{
uint32_t hash[5];
uint64_t buffer_nr_bits;
uint32_t w[80];
};
void sha_1_init(struct sha_1_params_t *params);
void sha_1_block(struct sha_1_params_t *params, uint32_t cur_hash[5], byte *data);
void sha_1_update(struct sha_1_params_t *params, byte *buffer, int size);
void sha_1_finish(struct sha_1_params_t *params);
void sha_1_output(struct sha_1_params_t *params, byte *out);
#endif /* __CRYPTO_H__ */
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