/*      $OpenBSD: michael.h,v 1.2 2012/12/05 23:20:15 deraadt Exp $     */

/*
 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _MICHAEL_H_
#define _MICHAEL_H_

#define MICHAEL_BLOCK_LENGTH            8
#define MICHAEL_RAW_BLOCK_LENGTH        4
#define MICHAEL_DIGEST_LENGTH           8

typedef struct michael_context {
        u_int32_t       michael_key[2];
        u_int32_t       michael_l, michael_r;
        u_int32_t       michael_state;
        u_int           michael_count;
} MICHAEL_CTX;

__BEGIN_DECLS
void     michael_init(MICHAEL_CTX *);
void     michael_update(MICHAEL_CTX *, const u_int8_t *, u_int)
            __attribute__((__bounded__(__buffer__, 2, 3)));
void     michael_final(u_int8_t [MICHAEL_DIGEST_LENGTH], MICHAEL_CTX *)
            __attribute__((__bounded__(__minbytes__, 1,
            MICHAEL_DIGEST_LENGTH)));
void     michael_key(const u_int8_t *, MICHAEL_CTX *)
            __attribute__((__bounded__(__minbytes__, 1,
            MICHAEL_BLOCK_LENGTH)));
__END_DECLS

#endif /* _MICHAEL_H_ */