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 * Copyright (c) 2001-2006, 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_ICM_H 47 #define AES_ICM_H 48 49 #include "aes.h" 50 #include "cipher.h" 51 52 typedef struct { 53 v128_t counter; /* holds the counter value */ 54 v128_t offset; /* initial offset value */ 55 v128_t keystream_buffer; /* buffers bytes of keystream */ 56 aes_expanded_key_t expanded_key; /* the cipher key */ 57 int bytes_in_buffer; /* number of unused bytes in buffer */ 58 } aes_icm_ctx_t; 59 60 61 err_status_t 62 aes_icm_context_init(aes_icm_ctx_t *c, 63 const unsigned char *key, 64 int key_len); 65 66 err_status_t 67 aes_icm_set_iv(aes_icm_ctx_t *c, void *iv); 68 69 err_status_t 70 aes_icm_encrypt(aes_icm_ctx_t *c, 71 unsigned char *buf, unsigned int *bytes_to_encr); 72 73 err_status_t 74 aes_icm_output(aes_icm_ctx_t *c, 75 unsigned char *buf, int bytes_to_output); 76 77 err_status_t 78 aes_icm_dealloc(cipher_t *c); 79 80 err_status_t 81 aes_icm_encrypt_ismacryp(aes_icm_ctx_t *c, 82 unsigned char *buf, 83 unsigned int *enc_len, 84 int forIsmacryp); 85 86 err_status_t 87 aes_icm_alloc_ismacryp(cipher_t **c, 88 int key_len, 89 int forIsmacryp); 90 91 #endif /* AES_ICM_H */ 92 93
