1 /* 2 * aes_cbc.h 3 * 4 * Header for AES Cipher Blobk Chaining 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_CBC_H 47 #define AES_CBC_H 48 49 #include "aes.h" 50 #include "cipher.h" 51 52 typedef struct { 53 v128_t state; /* cipher chaining state */ 54 v128_t previous; /* previous ciphertext block */ 55 aes_expanded_key_t expanded_key; /* the cipher key */ 56 } aes_cbc_ctx_t; 57 58 err_status_t 59 aes_cbc_set_key(aes_cbc_ctx_t *c, 60 const unsigned char *key); 61 62 err_status_t 63 aes_cbc_encrypt(aes_cbc_ctx_t *c, 64 unsigned char *buf, 65 unsigned int *bytes_in_data); 66 67 err_status_t 68 aes_cbc_context_init(aes_cbc_ctx_t *c, const uint8_t *key, 69 int key_len, cipher_direction_t dir); 70 71 err_status_t 72 aes_cbc_set_iv(aes_cbc_ctx_t *c, void *iv); 73 74 err_status_t 75 aes_cbc_nist_encrypt(aes_cbc_ctx_t *c, 76 unsigned char *data, 77 unsigned int *bytes_in_data); 78 79 err_status_t 80 aes_cbc_nist_decrypt(aes_cbc_ctx_t *c, 81 unsigned char *data, 82 unsigned int *bytes_in_data); 83 84 #endif /* AES_CBC_H */ 85 86
