/*
 * Copyright (c) 2015, Vsevolod Stakhov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *	 * Redistributions of source code must retain the above copyright
 *	   notice, this list of conditions and the following disclaimer.
 *	 * 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 AUTHOR ''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 AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef RSPAMD_BLAKE2_H
#define RSPAMD_BLAKE2_H

#if defined(__cplusplus)
extern "C" {
#endif

enum blake2b_constant {
	BLAKE2B_BLOCKBYTES = 128,
	BLAKE2B_OUTBYTES = 64,
	BLAKE2B_KEYBYTES = 64,
	BLAKE2B_SALTBYTES = 16,
	BLAKE2B_PERSONALBYTES = 16
};

typedef struct blake2b_state_t {
	unsigned char opaque[256];
} blake2b_state;

/* incremental */
void blake2b_init (blake2b_state *S);

void blake2b_keyed_init (blake2b_state *S,
		const unsigned char *key,
		size_t keylen);

void blake2b_update (blake2b_state *S,
		const unsigned char *in,
		size_t inlen);

void blake2b_final (blake2b_state *S, unsigned char *hash);

/* one-shot */
void blake2b (unsigned char *hash,
		const unsigned char *in,
		size_t inlen);

void blake2b_keyed (unsigned char *hash,
		const unsigned char *in,
		size_t inlen,
		const unsigned char *key,
		size_t keylen);

void blake2b_load (void);

#if defined(__cplusplus)
}
#endif

#endif