[linux-block.git] / crypto / blake2b_generic.c

// SPDX-License-Identifier: (GPL-2.0-only OR Apache-2.0)
/*
 * BLAKE2b reference source code package - reference C implementations
 *
 * Copyright 2012, Samuel Neves <sneves@dei.uc.pt>.  You may use this under the
 * terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
 * your option.  The terms of these licenses can be found at:
 *
 * - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 * - OpenSSL license   : https://www.openssl.org/source/license.html
 * - Apache 2.0        : https://www.apache.org/licenses/LICENSE-2.0
 *
 * More information about the BLAKE2 hash function can be found at
 * https://blake2.net.
 *
 * Note: the original sources have been modified for inclusion in linux kernel
 * in terms of coding style, using generic helpers and simplifications of error
 * handling.
 */

#include <asm/unaligned.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
#include <crypto/internal/blake2b.h>
#include <crypto/internal/hash.h>

static const u8 blake2b_sigma[12][16] = {
	{  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 },
	{ 14, 10,  4,  8,  9, 15, 13,  6,  1, 12,  0,  2, 11,  7,  5,  3 },
	{ 11,  8, 12,  0,  5,  2, 15, 13, 10, 14,  3,  6,  7,  1,  9,  4 },
	{  7,  9,  3,  1, 13, 12, 11, 14,  2,  6,  5, 10,  4,  0, 15,  8 },
	{  9,  0,  5,  7,  2,  4, 10, 15, 14,  1, 11, 12,  6,  8,  3, 13 },
	{  2, 12,  6, 10,  0, 11,  8,  3,  4, 13,  7,  5, 15, 14,  1,  9 },
	{ 12,  5,  1, 15, 14, 13,  4, 10,  0,  7,  6,  3,  9,  2,  8, 11 },
	{ 13, 11,  7, 14, 12,  1,  3,  9,  5,  0, 15,  4,  8,  6,  2, 10 },
	{  6, 15, 14,  9, 11,  3,  0,  8, 12,  2, 13,  7,  1,  4, 10,  5 },
	{ 10,  2,  8,  4,  7,  6,  1,  5, 15, 11,  9, 14,  3, 12, 13,  0 },
	{  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 },
	{ 14, 10,  4,  8,  9, 15, 13,  6,  1, 12,  0,  2, 11,  7,  5,  3 }
};

static void blake2b_increment_counter(struct blake2b_state *S, const u64 inc)
{
	S->t[0] += inc;
	S->t[1] += (S->t[0] < inc);
}

#define G(r,i,a,b,c,d)                                  \
	do {                                            \
		a = a + b + m[blake2b_sigma[r][2*i+0]]; \
		d = ror64(d ^ a, 32);                   \
		c = c + d;                              \
		b = ror64(b ^ c, 24);                   \
		a = a + b + m[blake2b_sigma[r][2*i+1]]; \
		d = ror64(d ^ a, 16);                   \
		c = c + d;                              \
		b = ror64(b ^ c, 63);                   \
	} while (0)

#define ROUND(r)                                \
	do {                                    \
		G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
		G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
		G(r,2,v[ 2],v[ 6],v[10],v[14]); \
		G(r,3,v[ 3],v[ 7],v[11],v[15]); \
		G(r,4,v[ 0],v[ 5],v[10],v[15]); \
		G(r,5,v[ 1],v[ 6],v[11],v[12]); \
		G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
		G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
	} while (0)

static void blake2b_compress_one_generic(struct blake2b_state *S,
					 const u8 block[BLAKE2B_BLOCK_SIZE])
{
	u64 m[16];
	u64 v[16];
	size_t i;

	for (i = 0; i < 16; ++i)
		m[i] = get_unaligned_le64(block + i * sizeof(m[i]));

	for (i = 0; i < 8; ++i)
		v[i] = S->h[i];

	v[ 8] = BLAKE2B_IV0;
	v[ 9] = BLAKE2B_IV1;
	v[10] = BLAKE2B_IV2;
	v[11] = BLAKE2B_IV3;
	v[12] = BLAKE2B_IV4 ^ S->t[0];
	v[13] = BLAKE2B_IV5 ^ S->t[1];
	v[14] = BLAKE2B_IV6 ^ S->f[0];
	v[15] = BLAKE2B_IV7 ^ S->f[1];

	ROUND(0);
	ROUND(1);
	ROUND(2);
	ROUND(3);
	ROUND(4);
	ROUND(5);
	ROUND(6);
	ROUND(7);
	ROUND(8);
	ROUND(9);
	ROUND(10);
	ROUND(11);
#ifdef CONFIG_CC_IS_CLANG
#pragma nounroll /* https://bugs.llvm.org/show_bug.cgi?id=45803 */
#endif
	for (i = 0; i < 8; ++i)
		S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
}

#undef G
#undef ROUND

void blake2b_compress_generic(struct blake2b_state *state,
			      const u8 *block, size_t nblocks, u32 inc)
{
	do {
		blake2b_increment_counter(state, inc);
		blake2b_compress_one_generic(state, block);
		block += BLAKE2B_BLOCK_SIZE;
	} while (--nblocks);
}
EXPORT_SYMBOL(blake2b_compress_generic);

static int crypto_blake2b_update_generic(struct shash_desc *desc,
					 const u8 *in, unsigned int inlen)
{
	return crypto_blake2b_update(desc, in, inlen, blake2b_compress_generic);
}

static int crypto_blake2b_final_generic(struct shash_desc *desc, u8 *out)
{
	return crypto_blake2b_final(desc, out, blake2b_compress_generic);
}

#define BLAKE2B_ALG(name, driver_name, digest_size)			\
	{								\
		.base.cra_name		= name,				\
		.base.cra_driver_name	= driver_name,			\
		.base.cra_priority	= 100,				\
		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,	\
		.base.cra_blocksize	= BLAKE2B_BLOCK_SIZE,		\
		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx), \
		.base.cra_module	= THIS_MODULE,			\
		.digestsize		= digest_size,			\
		.setkey			= crypto_blake2b_setkey,	\
		.init			= crypto_blake2b_init,		\
		.update			= crypto_blake2b_update_generic, \
		.final			= crypto_blake2b_final_generic,	\
		.descsize		= sizeof(struct blake2b_state),	\
	}

static struct shash_alg blake2b_algs[] = {
	BLAKE2B_ALG("blake2b-160", "blake2b-160-generic",
		    BLAKE2B_160_HASH_SIZE),
	BLAKE2B_ALG("blake2b-256", "blake2b-256-generic",
		    BLAKE2B_256_HASH_SIZE),
	BLAKE2B_ALG("blake2b-384", "blake2b-384-generic",
		    BLAKE2B_384_HASH_SIZE),
	BLAKE2B_ALG("blake2b-512", "blake2b-512-generic",
		    BLAKE2B_512_HASH_SIZE),
};

static int __init blake2b_mod_init(void)
{
	return crypto_register_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
}

static void __exit blake2b_mod_fini(void)
{
	crypto_unregister_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
}

subsys_initcall(blake2b_mod_init);
module_exit(blake2b_mod_fini);

MODULE_AUTHOR("David Sterba <kdave@kernel.org>");
MODULE_DESCRIPTION("BLAKE2b generic implementation");
MODULE_LICENSE("GPL");
MODULE_ALIAS_CRYPTO("blake2b-160");
MODULE_ALIAS_CRYPTO("blake2b-160-generic");
MODULE_ALIAS_CRYPTO("blake2b-256");
MODULE_ALIAS_CRYPTO("blake2b-256-generic");
MODULE_ALIAS_CRYPTO("blake2b-384");
MODULE_ALIAS_CRYPTO("blake2b-384-generic");
MODULE_ALIAS_CRYPTO("blake2b-512");
MODULE_ALIAS_CRYPTO("blake2b-512-generic");
Commit	Line	Data
91d68933 DS	1	// SPDX-License-Identifier: (GPL-2.0-only OR Apache-2.0)
	2	/*
	3	* BLAKE2b reference source code package - reference C implementations
	4	*
	5	* Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the
	6	* terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
	7	* your option. The terms of these licenses can be found at:
	8	*
	9	* - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
	10	* - OpenSSL license : https://www.openssl.org/source/license.html
9332a9e7	11	* - Apache 2.0 : https://www.apache.org/licenses/LICENSE-2.0
91d68933 DS	12	*
	13	* More information about the BLAKE2 hash function can be found at
	14	* https://blake2.net.
	15	*
	16	* Note: the original sources have been modified for inclusion in linux kernel
	17	* in terms of coding style, using generic helpers and simplifications of error
	18	* handling.
	19	*/
	20
	21	#include <asm/unaligned.h>
	22	#include <linux/module.h>
91d68933 DS	23	#include <linux/kernel.h>
91d68933 DS	24	#include <linux/bitops.h>
28dcca4c	25	#include <crypto/internal/blake2b.h>
91d68933 DS	26	#include <crypto/internal/hash.h>
91d68933 DS	27
91d68933 DS	28	static const u8 blake2b_sigma[12][16] = {
	29	{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
	30	{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 },
	31	{ 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 },
	32	{ 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 },
	33	{ 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 },
	34	{ 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 },
	35	{ 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 },
	36	{ 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 },
	37	{ 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 },
	38	{ 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0 },
	39	{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
	40	{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }
	41	};
	42
91d68933 DS	43	static void blake2b_increment_counter(struct blake2b_state *S, const u64 inc)
	44	{
	45	S->t[0] += inc;
	46	S->t[1] += (S->t[0] < inc);
	47	}
	48
91d68933 DS	49	#define G(r,i,a,b,c,d) \
	50	do { \
	51	a = a + b + m[blake2b_sigma[r][2*i+0]]; \
	52	d = ror64(d ^ a, 32); \
	53	c = c + d; \
	54	b = ror64(b ^ c, 24); \
	55	a = a + b + m[blake2b_sigma[r][2*i+1]]; \
	56	d = ror64(d ^ a, 16); \
	57	c = c + d; \
	58	b = ror64(b ^ c, 63); \
	59	} while (0)
	60
	61	#define ROUND(r) \
	62	do { \
	63	G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
	64	G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
	65	G(r,2,v[ 2],v[ 6],v[10],v[14]); \
	66	G(r,3,v[ 3],v[ 7],v[11],v[15]); \
	67	G(r,4,v[ 0],v[ 5],v[10],v[15]); \
	68	G(r,5,v[ 1],v[ 6],v[11],v[12]); \
	69	G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
	70	G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
	71	} while (0)
	72
28dcca4c EB	73	static void blake2b_compress_one_generic(struct blake2b_state *S,
28dcca4c EB	74	const u8 block[BLAKE2B_BLOCK_SIZE])
91d68933 DS	75	{
	76	u64 m[16];
	77	u64 v[16];
	78	size_t i;
	79
	80	for (i = 0; i < 16; ++i)
	81	m[i] = get_unaligned_le64(block + i * sizeof(m[i]));
	82
	83	for (i = 0; i < 8; ++i)
	84	v[i] = S->h[i];
	85
28dcca4c EB	86	v[ 8] = BLAKE2B_IV0;
	87	v[ 9] = BLAKE2B_IV1;
	88	v[10] = BLAKE2B_IV2;
	89	v[11] = BLAKE2B_IV3;
	90	v[12] = BLAKE2B_IV4 ^ S->t[0];
	91	v[13] = BLAKE2B_IV5 ^ S->t[1];
	92	v[14] = BLAKE2B_IV6 ^ S->f[0];
	93	v[15] = BLAKE2B_IV7 ^ S->f[1];
91d68933 DS	94
	95	ROUND(0);
	96	ROUND(1);
	97	ROUND(2);
	98	ROUND(3);
	99	ROUND(4);
	100	ROUND(5);
	101	ROUND(6);
	102	ROUND(7);
	103	ROUND(8);
	104	ROUND(9);
	105	ROUND(10);
	106	ROUND(11);
0c0408e8 AB	107	#ifdef CONFIG_CC_IS_CLANG
	108	#pragma nounroll /* https://bugs.llvm.org/show_bug.cgi?id=45803 */
	109	#endif
91d68933 DS	110	for (i = 0; i < 8; ++i)
	111	S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
	112	}
	113
	114	#undef G
	115	#undef ROUND
	116
28dcca4c EB	117	void blake2b_compress_generic(struct blake2b_state *state,
28dcca4c EB	118	const u8 *block, size_t nblocks, u32 inc)
91d68933	119	{
28dcca4c EB	120	do {
	121	blake2b_increment_counter(state, inc);
	122	blake2b_compress_one_generic(state, block);
	123	block += BLAKE2B_BLOCK_SIZE;
	124	} while (--nblocks);
91d68933	125	}
28dcca4c	126	EXPORT_SYMBOL(blake2b_compress_generic);
91d68933	127
28dcca4c EB	128	static int crypto_blake2b_update_generic(struct shash_desc *desc,
28dcca4c EB	129	const u8 *in, unsigned int inlen)
91d68933	130	{
28dcca4c	131	return crypto_blake2b_update(desc, in, inlen, blake2b_compress_generic);
91d68933 DS	132	}
91d68933 DS	133
28dcca4c	134	static int crypto_blake2b_final_generic(struct shash_desc desc, u8 out)
91d68933	135	{
28dcca4c	136	return crypto_blake2b_final(desc, out, blake2b_compress_generic);
91d68933 DS	137	}
91d68933 DS	138
28dcca4c EB	139	#define BLAKE2B_ALG(name, driver_name, digest_size) \
	140	{ \
	141	.base.cra_name = name, \
	142	.base.cra_driver_name = driver_name, \
	143	.base.cra_priority = 100, \
	144	.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, \
	145	.base.cra_blocksize = BLAKE2B_BLOCK_SIZE, \
	146	.base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx), \
	147	.base.cra_module = THIS_MODULE, \
	148	.digestsize = digest_size, \
	149	.setkey = crypto_blake2b_setkey, \
	150	.init = crypto_blake2b_init, \
	151	.update = crypto_blake2b_update_generic, \
	152	.final = crypto_blake2b_final_generic, \
	153	.descsize = sizeof(struct blake2b_state), \
	154	}
91d68933 DS	155
91d68933 DS	156	static struct shash_alg blake2b_algs[] = {
28dcca4c EB	157	BLAKE2B_ALG("blake2b-160", "blake2b-160-generic",
	158	BLAKE2B_160_HASH_SIZE),
	159	BLAKE2B_ALG("blake2b-256", "blake2b-256-generic",
	160	BLAKE2B_256_HASH_SIZE),
	161	BLAKE2B_ALG("blake2b-384", "blake2b-384-generic",
	162	BLAKE2B_384_HASH_SIZE),
	163	BLAKE2B_ALG("blake2b-512", "blake2b-512-generic",
	164	BLAKE2B_512_HASH_SIZE),
91d68933 DS	165	};
	166
	167	static int __init blake2b_mod_init(void)
	168	{
91d68933 DS	169	return crypto_register_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
	170	}
	171
	172	static void __exit blake2b_mod_fini(void)
	173	{
	174	crypto_unregister_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
	175	}
	176
	177	subsys_initcall(blake2b_mod_init);
	178	module_exit(blake2b_mod_fini);
	179
	180	MODULE_AUTHOR("David Sterba <kdave@kernel.org>");
	181	MODULE_DESCRIPTION("BLAKE2b generic implementation");
	182	MODULE_LICENSE("GPL");
	183	MODULE_ALIAS_CRYPTO("blake2b-160");
	184	MODULE_ALIAS_CRYPTO("blake2b-160-generic");
	185	MODULE_ALIAS_CRYPTO("blake2b-256");
	186	MODULE_ALIAS_CRYPTO("blake2b-256-generic");
	187	MODULE_ALIAS_CRYPTO("blake2b-384");
	188	MODULE_ALIAS_CRYPTO("blake2b-384-generic");
	189	MODULE_ALIAS_CRYPTO("blake2b-512");
	190	MODULE_ALIAS_CRYPTO("blake2b-512-generic");