aes.h (2463B)
1 /* 2 * aes.h 3 * 4 * header file for the AES block cipher 5 * 6 * David A. McGrew 7 * Cisco Systems, Inc. 8 */ 9 10 /* 11 * 12 * Copyright (c) 2001-2017, Cisco Systems, Inc. 13 * All rights reserved. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 19 * Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 22 * Redistributions in binary form must reproduce the above 23 * copyright notice, this list of conditions and the following 24 * disclaimer in the documentation and/or other materials provided 25 * with the distribution. 26 * 27 * Neither the name of the Cisco Systems, Inc. nor the names of its 28 * contributors may be used to endorse or promote products derived 29 * from this software without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 34 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 35 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 36 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 38 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 42 * OF THE POSSIBILITY OF SUCH DAMAGE. 43 * 44 */ 45 46 #ifndef AES_H 47 #define AES_H 48 49 #include "datatypes.h" 50 #include "err.h" 51 52 #ifdef __cplusplus 53 extern "C" { 54 #endif 55 56 /* aes internals */ 57 58 typedef struct { 59 v128_t round[15]; 60 int num_rounds; 61 } srtp_aes_expanded_key_t; 62 63 srtp_err_status_t srtp_aes_expand_encryption_key( 64 const uint8_t *key, 65 int key_len, 66 srtp_aes_expanded_key_t *expanded_key); 67 68 srtp_err_status_t srtp_aes_expand_decryption_key( 69 const uint8_t *key, 70 int key_len, 71 srtp_aes_expanded_key_t *expanded_key); 72 73 void srtp_aes_encrypt(v128_t *plaintext, 74 const srtp_aes_expanded_key_t *exp_key); 75 76 void srtp_aes_decrypt(v128_t *plaintext, 77 const srtp_aes_expanded_key_t *exp_key); 78 79 #ifdef __cplusplus 80 } 81 #endif 82 83 #endif /* AES_H */