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(void *);
62 void AES_CBC_MAC_Setkey(void *, const uint8_t *, u_int);
63 void AES_CBC_MAC_Reinit(void *, const uint8_t *, u_int);
64 int AES_CBC_MAC_Update(void *, const void *, u_int);
65 void AES_CBC_MAC_Final(uint8_t *, void *);
66
67 #endif /* _CBC_CCM_H */
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