1 /* 2 * Copyright (c) 2014 The FreeBSD Foundation 3 * Copyright (c) 2018, iXsystems Inc. 4 * All rights reserved. 5 * 6 * This software was developed by Sean Eric Fagan, with lots of references 7 * to existing AES-CCM (gmac) code. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32 #ifndef _CBC_CCM_H 33 # define _CBC_CCM_H 34 35 # include <sys/types.h> 36 # include <crypto/rijndael/rijndael.h> 37 38 # define CCM_CBC_BLOCK_LEN 16 /* 128 bits */ 39 # define CCM_CBC_MAX_DIGEST_LEN 16 40 # define CCM_CBC_MIN_DIGEST_LEN 4 41 42 /* 43 * This is the authentication context structure; 44 * the encryption one is similar. 45 */ 46 struct aes_cbc_mac_ctx { 47 uint8_t staging_block[CCM_CBC_BLOCK_LEN]; 48 uint8_t block[CCM_CBC_BLOCK_LEN]; 49 int blockIndex; 50 int nonceLength; /* This one is in bytes, not bits! */ 51 const uint8_t *nonce; 52 /* AES state data */ 53 int rounds; 54 uint32_t keysched[4*(RIJNDAEL_MAXNR+1)]; 55 }; 56 57 void AES_CBC_MAC_Init(void *); 58 void AES_CBC_MAC_Setkey(void *, const uint8_t *, u_int); 59 void AES_CBC_MAC_Reinit(void *, const uint8_t *, u_int); 60 int AES_CBC_MAC_Update(void *, const void *, u_int); 61 void AES_CBC_MAC_Final(uint8_t *, void *); 62 63 #endif /* _CBC_CCM_H */ 64