84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/*
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* aes.h
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*
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* header file for the AES block cipher
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*
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* David A. McGrew
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* Cisco Systems, Inc.
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*/
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/*
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*
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* Copyright (c) 2001-2017, Cisco Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* Neither the name of the Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef AES_H
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#define AES_H
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#include "datatypes.h"
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#include "err.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* aes internals */
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typedef struct {
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v128_t round[15];
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int num_rounds;
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} srtp_aes_expanded_key_t;
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srtp_err_status_t srtp_aes_expand_encryption_key(
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const uint8_t *key,
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int key_len,
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srtp_aes_expanded_key_t *expanded_key);
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srtp_err_status_t srtp_aes_expand_decryption_key(
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const uint8_t *key,
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int key_len,
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srtp_aes_expanded_key_t *expanded_key);
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void srtp_aes_encrypt(v128_t *plaintext,
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const srtp_aes_expanded_key_t *exp_key);
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void srtp_aes_decrypt(v128_t *plaintext,
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const srtp_aes_expanded_key_t *exp_key);
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#ifdef __cplusplus
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}
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#endif
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#endif /* AES_H */
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