a99bc4c3eb
This adds the CBC-MAC code to the kernel, but does not hook it up to anything (that comes in the next commit). https://tools.ietf.org/html/rfc3610 describes the algorithm. Note that this is a software-only implementation, which means it is fairly slow. Sponsored by: iXsystems Inc Differential Revision: https://reviews.freebsd.org/D18592
68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
/*
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* Copyright (c) 2014 The FreeBSD Foundation
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* Copyright (c) 2018, iXsystems Inc.
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* All rights reserved.
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*
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* This software was developed by Sean Eric Fagan, with lots of references
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* to existing AES-CCM (gmac) code.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#ifndef _CBC_CCM_H
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# define _CBC_CCM_H
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# include <sys/types.h>
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# include <crypto/rijndael/rijndael.h>
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# define CCM_CBC_BLOCK_LEN 16 /* 128 bits */
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# define CCM_CBC_MAX_DIGEST_LEN 16
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# define CCM_CBC_MIN_DIGEST_LEN 4
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/*
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* This is the authentication context structure;
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* the encryption one is similar.
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*/
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struct aes_cbc_mac_ctx {
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uint64_t authDataLength, authDataCount;
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uint64_t cryptDataLength, cryptDataCount;
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int blockIndex;
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uint8_t staging_block[CCM_CBC_BLOCK_LEN];
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uint8_t block[CCM_CBC_BLOCK_LEN];
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const uint8_t *nonce;
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int nonceLength; /* This one is in bytes, not bits! */
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/* AES state data */
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int rounds;
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uint32_t keysched[4*(RIJNDAEL_MAXNR+1)];
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};
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void AES_CBC_MAC_Init(struct aes_cbc_mac_ctx *);
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void AES_CBC_MAC_Setkey(struct aes_cbc_mac_ctx *, const uint8_t *, uint16_t);
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void AES_CBC_MAC_Reinit(struct aes_cbc_mac_ctx *, const uint8_t *, uint16_t);
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int AES_CBC_MAC_Update(struct aes_cbc_mac_ctx *, const uint8_t *, uint16_t);
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void AES_CBC_MAC_Final(uint8_t *, struct aes_cbc_mac_ctx *);
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#endif /* _CBC_CCM_H */
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