50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* $OpenBSD: gmac.h,v 1.6 2017/05/02 11:44:32 mikeb Exp $ */
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/*
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* Copyright (c) 2010 Mike Belopuhov
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _GMAC_H_
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#define _GMAC_H_
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#include <crypto/aes.h>
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#define GMAC_BLOCK_LEN 16
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#define GMAC_DIGEST_LEN 16
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typedef struct _GHASH_CTX {
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uint8_t H[GMAC_BLOCK_LEN]; /* hash subkey */
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uint8_t S[GMAC_BLOCK_LEN]; /* state */
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uint8_t Z[GMAC_BLOCK_LEN]; /* initial state */
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} GHASH_CTX;
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typedef struct _AES_GMAC_CTX {
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GHASH_CTX ghash;
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AES_CTX K;
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uint8_t J[GMAC_BLOCK_LEN]; /* counter block */
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} AES_GMAC_CTX;
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__BEGIN_DECLS
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extern void (*ghash_update)(GHASH_CTX *, uint8_t *, size_t);
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void AES_GMAC_Init(void *);
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void AES_GMAC_Setkey(void *, const uint8_t *, uint16_t);
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void AES_GMAC_Reinit(void *, const uint8_t *, uint16_t);
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int AES_GMAC_Update(void *, const uint8_t *, uint16_t);
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void AES_GMAC_Final(uint8_t [GMAC_DIGEST_LEN], void *);
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__END_DECLS
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#endif /* _GMAC_H_ */
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