randomx/src/blake2/blake2.h

/*
Copyright (c) 2018 tevador

This file is part of RandomX.

RandomX is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

RandomX is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with RandomX.  If not, see<http://www.gnu.org/licenses/>.
*/

/* Original code from Argon2 reference source code package used under CC0 Licence
 * https://github.com/P-H-C/phc-winner-argon2
 * Copyright 2015
 * Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
*/

#ifndef PORTABLE_BLAKE2_H
#define PORTABLE_BLAKE2_H

#include <stdint.h>
#include <limits.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
	};

#pragma pack(push, 1)
	typedef struct __blake2b_param {
		uint8_t digest_length;                   /* 1 */
		uint8_t key_length;                      /* 2 */
		uint8_t fanout;                          /* 3 */
		uint8_t depth;                           /* 4 */
		uint32_t leaf_length;                    /* 8 */
		uint64_t node_offset;                    /* 16 */
		uint8_t node_depth;                      /* 17 */
		uint8_t inner_length;                    /* 18 */
		uint8_t reserved[14];                    /* 32 */
		uint8_t salt[BLAKE2B_SALTBYTES];         /* 48 */
		uint8_t personal[BLAKE2B_PERSONALBYTES]; /* 64 */
	} blake2b_param;
#pragma pack(pop)

	typedef struct __blake2b_state {
		uint64_t h[8];
		uint64_t t[2];
		uint64_t f[2];
		uint8_t buf[BLAKE2B_BLOCKBYTES];
		unsigned buflen;
		unsigned outlen;
		uint8_t last_node;
	} blake2b_state;

	/* Ensure param structs have not been wrongly padded */
	/* Poor man's static_assert */
	enum {
		blake2_size_check_0 = 1 / !!(CHAR_BIT == 8),
		blake2_size_check_2 =
		1 / !!(sizeof(blake2b_param) == sizeof(uint64_t) * CHAR_BIT)
	};

	/* Streaming API */
	int blake2b_init(blake2b_state *S, size_t outlen);
	int blake2b_init_key(blake2b_state *S, size_t outlen, const void *key,
		size_t keylen);
	int blake2b_init_param(blake2b_state *S, const blake2b_param *P);
	int blake2b_update(blake2b_state *S, const void *in, size_t inlen);
	int blake2b_final(blake2b_state *S, void *out, size_t outlen);

	/* Simple API */
	int blake2b(void *out, size_t outlen, const void *in, size_t inlen,
		const void *key, size_t keylen);

	/* Argon2 Team - Begin Code */
	int blake2b_long(void *out, size_t outlen, const void *in, size_t inlen);
	/* Argon2 Team - End Code */

#if defined(__cplusplus)
}
#endif

#endif