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 * $FreeBSD$ 31 * 32 */ 33 34 #ifndef _CBC_CCM_H 35 # define _CBC_CCM_H 36 37 # include <sys/types.h> 38 # include <crypto/rijndael/rijndael.h> 39 40 # define CCM_CBC_BLOCK_LEN 16 /* 128 bits */ 41 # define CCM_CBC_MAX_DIGEST_LEN 16 42 # define CCM_CBC_MIN_DIGEST_LEN 4 43 44 /* 45 * This is the authentication context structure; 46 * the encryption one is similar. 47 */ 48 struct aes_cbc_mac_ctx { 49 uint64_t authDataLength, authDataCount; 50 uint64_t cryptDataLength, cryptDataCount; 51 int blockIndex; 52 uint8_t staging_block[CCM_CBC_BLOCK_LEN]; 53 uint8_t block[CCM_CBC_BLOCK_LEN]; 54 const uint8_t *nonce; 55 int nonceLength; /* This one is in bytes, not bits! */ 56 /* AES state data */ 57 int rounds; 58 uint32_t keysched[4*(RIJNDAEL_MAXNR+1)]; 59 }; 60 61 void AES_CBC_MAC_Init(struct aes_cbc_mac_ctx *); 62 void AES_CBC_MAC_Setkey(struct aes_cbc_mac_ctx *, const uint8_t *, uint16_t); 63 void AES_CBC_MAC_Reinit(struct aes_cbc_mac_ctx *, const uint8_t *, uint16_t); 64 int AES_CBC_MAC_Update(struct aes_cbc_mac_ctx *, const uint8_t *, uint16_t); 65 void AES_CBC_MAC_Final(uint8_t *, struct aes_cbc_mac_ctx *); 66 67 #endif /* _CBC_CCM_H */ 68