| /* |
| * aes.h |
| * |
| * header file for the AES block cipher |
| * |
| * David A. McGrew |
| * Cisco Systems, Inc. |
| */ |
| |
| /* |
| * |
| * Copyright (c) 2001-2006, 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 "gf2_8.h" |
| #include "err.h" |
| |
| /* 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); |
| |
| #endif /* _AES_H */ |