/* ====================================================================
* 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
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ==================================================================== */
#ifndef OPENSSL_HEADER_AES_H
#define OPENSSL_HEADER_AES_H
#include <openssl/base.h>
#if defined(__cplusplus)
extern "C" {
#endif
/* Raw AES functions. */
#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;
/* 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. */
OPENSSL_EXPORT int AES_set_encrypt_key(const uint8_t *key, unsigned bits,
AES_KEY *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. */
OPENSSL_EXPORT int AES_set_decrypt_key(const uint8_t *key, unsigned bits,
AES_KEY *aeskey);
/* AES_encrypt encrypts a single block from |in| to |out| with |key|. The |in|
* and |out| pointers may overlap. */
OPENSSL_EXPORT void AES_encrypt(const uint8_t *in, uint8_t *out,
const AES_KEY *key);
/* AES_decrypt decrypts a single block from |in| to |out| with |key|. The |in|
* and |out| pointers may overlap. */
OPENSSL_EXPORT void AES_decrypt(const uint8_t *in, uint8_t *out,
const AES_KEY *key);
/* Block cipher modes. */
/* AES_ctr128_encrypt encrypts (or decrypts, it's the same in CTR mode) |len|
* bytes from |in| to |out|. The |num| parameter must be set to zero on the
* first call and |ivec| will be incremented. */
OPENSSL_EXPORT void AES_ctr128_encrypt(const uint8_t *in, uint8_t *out,
size_t len, const AES_KEY *key,
uint8_t ivec[AES_BLOCK_SIZE],
uint8_t ecount_buf[AES_BLOCK_SIZE],
unsigned int *num);
/* AES_ecb_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) a single,
* 16 byte block from |in| to |out|. */
OPENSSL_EXPORT void AES_ecb_encrypt(const uint8_t *in, uint8_t *out,
const AES_KEY *key, const int enc);
/* AES_cbc_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) |len|
* bytes from |in| to |out|. The length must be a multiple of the block size. */
OPENSSL_EXPORT void AES_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t len,
const AES_KEY *key, uint8_t *ivec,
const int enc);
/* AES_ofb128_encrypt encrypts (or decrypts, it's the same in OFB mode) |len|
* bytes from |in| to |out|. The |num| parameter must be set to zero on the
* first call. */
OPENSSL_EXPORT void AES_ofb128_encrypt(const uint8_t *in, uint8_t *out,
size_t len, const AES_KEY *key,
uint8_t *ivec, int *num);
/* AES_cfb128_encrypt encrypts (or decrypts, if |enc| == |AES_DECRYPT|) |len|
* bytes from |in| to |out|. The |num| parameter must be set to zero on the
* first call. */
OPENSSL_EXPORT void AES_cfb128_encrypt(const uint8_t *in, uint8_t *out,
size_t len, const AES_KEY *key,
uint8_t *ivec, int *num, int enc);
/* AES key wrap.
*
* These functions implement AES Key Wrap mode, as defined in RFC 3394. They
* should never be used except to interoperate with existing systems that use
* this mode. */
/* AES_wrap_key performs AES key wrap on |in| which must be a multiple of 8
* bytes. |iv| must point to an 8 byte value or be NULL to use the default IV.
* |key| must have been configured for encryption. On success, it writes
* |in_len| + 8 bytes to |out| and returns |in_len| + 8. Otherwise, it returns
* -1. */
OPENSSL_EXPORT int AES_wrap_key(const AES_KEY *key, const uint8_t *iv,
uint8_t *out, const uint8_t *in, size_t in_len);
/* AES_unwrap_key performs AES key unwrap on |in| which must be a multiple of 8
* bytes. |iv| must point to an 8 byte value or be NULL to use the default IV.
* |key| must have been configured for decryption. On success, it writes
* |in_len| - 8 bytes to |out| and returns |in_len| - 8. Otherwise, it returns
* -1. */
OPENSSL_EXPORT int AES_unwrap_key(const AES_KEY *key, const uint8_t *iv,
uint8_t *out, const uint8_t *in,
size_t in_len);
#if defined(__cplusplus)
} /* extern C */
#endif
#endif /* OPENSSL_HEADER_AES_H */