aes_icm.h (2341B)
1 /* 2 * aes_icm.h 3 * 4 * Header for AES Integer Counter Mode. 5 * 6 * David A. McGrew 7 * Cisco Systems, Inc. 8 * 9 */ 10 11 /* 12 * 13 * Copyright (c) 2001-2017, Cisco Systems, Inc. 14 * All rights reserved. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 20 * Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 23 * Redistributions in binary form must reproduce the above 24 * copyright notice, this list of conditions and the following 25 * disclaimer in the documentation and/or other materials provided 26 * with the distribution. 27 * 28 * Neither the name of the Cisco Systems, Inc. nor the names of its 29 * contributors may be used to endorse or promote products derived 30 * from this software without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 35 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 36 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 37 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 38 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 39 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 41 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 42 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 43 * OF THE POSSIBILITY OF SUCH DAMAGE. 44 * 45 */ 46 47 #ifndef AES_ICM_H 48 #define AES_ICM_H 49 50 #include "aes.h" 51 #include "cipher.h" 52 53 typedef struct { 54 v128_t counter; /* holds the counter value */ 55 v128_t offset; /* initial offset value */ 56 v128_t keystream_buffer; /* buffers bytes of keystream */ 57 srtp_aes_expanded_key_t expanded_key; /* the cipher key */ 58 int bytes_in_buffer; /* number of unused bytes in buffer */ 59 int key_size; /* AES key size + 14 byte SALT */ 60 } srtp_aes_icm_ctx_t; 61 62 #endif /* AES_ICM_H */