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/*
* aes.h
*
* header file for the AES block cipher
*
* David A. McGrew
* Cisco Systems, Inc.
*/
/*
*
* Copyright (c) 2001-2017, Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS 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
* COPYRIGHT HOLDERS OR 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 AES_H
#define AES_H
#include "datatypes.h"
#include "err.h"
#ifdef __cplusplus
extern "C" {
#endif
/* aes internals */
typedef struct {
v128_t round[15];
int num_rounds;
} srtp_aes_expanded_key_t;
srtp_err_status_t srtp_aes_expand_encryption_key(
const uint8_t *key,
int key_len,
srtp_aes_expanded_key_t *expanded_key);
srtp_err_status_t srtp_aes_expand_decryption_key(
const uint8_t *key,
int key_len,
srtp_aes_expanded_key_t *expanded_key);
void srtp_aes_encrypt(v128_t *plaintext,
const srtp_aes_expanded_key_t *exp_key);
void srtp_aes_decrypt(v128_t *plaintext,
const srtp_aes_expanded_key_t *exp_key);
#ifdef __cplusplus
}
#endif
#endif /* AES_H */
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