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/* ====================================================================
* Copyright (c) 2002-2006 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ==================================================================== */
#ifndef __CROS_EC_AES_H
#define __CROS_EC_AES_H
#include <stdint.h>
#define AES_ENCRYPT 1
#define AES_DECRYPT 0
/* AES_MAXNR is the maximum number of AES rounds. */
#define AES_MAXNR 14
#define AES_BLOCK_SIZE 16
/*
* aes_key_st should be an opaque type, but EVP requires that the size be
* known.
*/
struct aes_key_st {
uint32_t rd_key[4 * (AES_MAXNR + 1)];
unsigned rounds;
};
typedef struct aes_key_st AES_KEY;
/*
* These functions are provided by either common/aes.c, or assembly code,
* and should not be called directly.
*/
void aes_nohw_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
void aes_nohw_decrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
int aes_nohw_set_encrypt_key(const uint8_t *key, unsigned bits,
AES_KEY *aeskey);
int aes_nohw_set_decrypt_key(const uint8_t *key, unsigned bits,
AES_KEY *aeskey);
/**
* AES_set_encrypt_key configures |aeskey| to encrypt with the |bits|-bit key,
* |key|.
*
* WARNING: unlike other OpenSSL functions, this returns zero on success and a
* negative number on error.
*/
static inline int AES_set_encrypt_key(const uint8_t *key, unsigned int bits,
AES_KEY *aeskey)
{
return aes_nohw_set_encrypt_key(key, bits, aeskey);
}
/**
* AES_set_decrypt_key configures |aeskey| to decrypt with the |bits|-bit key,
* |key|.
*
* WARNING: unlike other OpenSSL functions, this returns zero on success and a
* negative number on error.
*/
static inline int AES_set_decrypt_key(const uint8_t *key, unsigned int bits,
AES_KEY *aeskey)
{
return aes_nohw_set_decrypt_key(key, bits, aeskey);
}
/**
* AES_encrypt encrypts a single block from |in| to |out| with |key|. The |in|
* and |out| pointers may overlap.
*/
static inline void AES_encrypt(const uint8_t *in, uint8_t *out,
const AES_KEY *key)
{
aes_nohw_encrypt(in, out, key);
}
/**
* AES_decrypt decrypts a single block from |in| to |out| with |key|. The |in|
* and |out| pointers may overlap.
*/
static inline void AES_decrypt(const uint8_t *in, uint8_t *out,
const AES_KEY *key)
{
aes_nohw_decrypt(in, out, key);
}
#endif /* __CROS_EC_AES_H */
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