/*
 * IDI,NTNU
 *
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://opensource.org/licenses/CDDL-1.0.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 * Copyright (C) 2009, 2010, Jorn Amundsen <jorn.amundsen@ntnu.no>
 *
 * Tweaked Edon-R implementation for SUPERCOP, based on NIST API.
 *
 * $Id: edonr.h 517 2013-02-17 20:34:39Z joern $
 */
/*
 * Portions copyright (c) 2013, Saso Kiselkov, All rights reserved
 */

#ifndef	_SYS_EDONR_H_
#define	_SYS_EDONR_H_

#ifdef	__cplusplus
extern "C" {
#endif

#ifdef  _KERNEL
#include <sys/types.h>
#else
#include <stdint.h> /* uint32_t... */
#include <stdlib.h> /* size_t ... */
#endif

/*
 * EdonR allows to call EdonRUpdate() consecutively only if the total length
 * of stored unprocessed data and the new supplied data is less than or equal
 * to the BLOCK_SIZE on which the compression functions operates.
 * Otherwise an assertion failure is invoked.
 */

/* Specific algorithm definitions */
#define	EdonR224_DIGEST_SIZE	28
#define	EdonR224_BLOCK_SIZE	64
#define	EdonR256_DIGEST_SIZE	32
#define	EdonR256_BLOCK_SIZE	64
#define	EdonR384_DIGEST_SIZE	48
#define	EdonR384_BLOCK_SIZE	128
#define	EdonR512_DIGEST_SIZE	64
#define	EdonR512_BLOCK_SIZE	128

#define	EdonR256_BLOCK_BITSIZE	512
#define	EdonR512_BLOCK_BITSIZE	1024

typedef struct {
	uint32_t DoublePipe[16];
	uint8_t LastPart[EdonR256_BLOCK_SIZE * 2];
} EdonRData256;
typedef struct {
	uint64_t DoublePipe[16];
	uint8_t LastPart[EdonR512_BLOCK_SIZE * 2];
} EdonRData512;

typedef struct {
	size_t hashbitlen;

	/* + algorithm specific parameters */
	int unprocessed_bits;
	uint64_t bits_processed;
	union {
		EdonRData256 p256[1];
		EdonRData512 p512[1];
	} pipe[1];
} EdonRState;

void EdonRInit(EdonRState *state, size_t hashbitlen);
void EdonRUpdate(EdonRState *state, const uint8_t *data, size_t databitlen);
void EdonRFinal(EdonRState *state, uint8_t *hashval);
void EdonRHash(size_t hashbitlen, const uint8_t *data, size_t databitlen,
    uint8_t *hashval);

#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_EDONR_H_ */