/*      $NetBSD: aes_ccm.h,v 1.2 2020/07/27 20:44:30 riastradh Exp $    */

/*-
* Copyright (c) 2020 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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*/

#ifndef _CRYPTO_AES_AES_CCM_H
#define _CRYPTO_AES_AES_CCM_H

#include <sys/types.h>

struct aesenc;

struct aes_ccm {
       const struct aesenc     *enc;
       uint8_t                 authctr[32];    /* authenticator and counter */
       uint8_t                 out[16];        /* AES output block */
       size_t                  mlen, mleft;
       unsigned                i, nr, L, M;
};

void aes_ccm_init(struct aes_ccm *, unsigned, const struct aesenc *,
   unsigned, unsigned, const uint8_t *, unsigned, const void *, size_t,
   size_t);
void aes_ccm_enc(struct aes_ccm *, const void *, void *, size_t);
void aes_ccm_dec(struct aes_ccm *, const void *, void *, size_t);
void aes_ccm_tag(struct aes_ccm *, void *);
int aes_ccm_verify(struct aes_ccm *, const void *);

int aes_ccm_selftest(void);

#endif  /* _CRYPTO_AES_AES_CCM_H */