[mirror_ubuntu-jammy-kernel.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/string.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
#include <crypto/internal/hash.h>

#define BLAKE2B_160_DIGEST_SIZE		(160 / 8)
#define BLAKE2B_256_DIGEST_SIZE		(256 / 8)
#define BLAKE2B_384_DIGEST_SIZE		(384 / 8)
#define BLAKE2B_512_DIGEST_SIZE		(512 / 8)

enum blake2b_constant {
	BLAKE2B_BLOCKBYTES    = 128,
	BLAKE2B_KEYBYTES      = 64,
};

struct blake2b_state {
	u64      h[8];
	u64      t[2];
	u64      f[2];
	u8       buf[BLAKE2B_BLOCKBYTES];
	size_t   buflen;
};

static const u64 blake2b_IV[8] = {
	0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL,
	0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL,
	0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
	0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL
};

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(struct blake2b_state *S,
			     const u8 block[BLAKE2B_BLOCKBYTES])
{
	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_IV[0];
	v[ 9] = blake2b_IV[1];
	v[10] = blake2b_IV[2];
	v[11] = blake2b_IV[3];
	v[12] = blake2b_IV[4] ^ S->t[0];
	v[13] = blake2b_IV[5] ^ S->t[1];
	v[14] = blake2b_IV[6] ^ S->f[0];
	v[15] = blake2b_IV[7] ^ 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

struct blake2b_tfm_ctx {
	u8 key[BLAKE2B_KEYBYTES];
	unsigned int keylen;
};

static int blake2b_setkey(struct crypto_shash *tfm, const u8 *key,
			  unsigned int keylen)
{
	struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(tfm);

	if (keylen == 0 || keylen > BLAKE2B_KEYBYTES)
		return -EINVAL;

	memcpy(tctx->key, key, keylen);
	tctx->keylen = keylen;

	return 0;
}

static int blake2b_init(struct shash_desc *desc)
{
	struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
	struct blake2b_state *state = shash_desc_ctx(desc);
	const int digestsize = crypto_shash_digestsize(desc->tfm);

	memset(state, 0, sizeof(*state));
	memcpy(state->h, blake2b_IV, sizeof(state->h));

	/* Parameter block is all zeros except index 0, no xor for 1..7 */
	state->h[0] ^= 0x01010000 | tctx->keylen << 8 | digestsize;

	if (tctx->keylen) {
		/*
		 * Prefill the buffer with the key, next call to _update or
		 * _final will process it
		 */
		memcpy(state->buf, tctx->key, tctx->keylen);
		state->buflen = BLAKE2B_BLOCKBYTES;
	}
	return 0;
}

static int blake2b_update(struct shash_desc *desc, const u8 *in,
			  unsigned int inlen)
{
	struct blake2b_state *state = shash_desc_ctx(desc);
	const size_t left = state->buflen;
	const size_t fill = BLAKE2B_BLOCKBYTES - left;

	if (!inlen)
		return 0;

	if (inlen > fill) {
		state->buflen = 0;
		/* Fill buffer */
		memcpy(state->buf + left, in, fill);
		blake2b_increment_counter(state, BLAKE2B_BLOCKBYTES);
		/* Compress */
		blake2b_compress(state, state->buf);
		in += fill;
		inlen -= fill;
		while (inlen > BLAKE2B_BLOCKBYTES) {
			blake2b_increment_counter(state, BLAKE2B_BLOCKBYTES);
			blake2b_compress(state, in);
			in += BLAKE2B_BLOCKBYTES;
			inlen -= BLAKE2B_BLOCKBYTES;
		}
	}
	memcpy(state->buf + state->buflen, in, inlen);
	state->buflen += inlen;

	return 0;
}

static int blake2b_final(struct shash_desc *desc, u8 *out)
{
	struct blake2b_state *state = shash_desc_ctx(desc);
	const int digestsize = crypto_shash_digestsize(desc->tfm);
	size_t i;

	blake2b_increment_counter(state, state->buflen);
	/* Set last block */
	state->f[0] = (u64)-1;
	/* Padding */
	memset(state->buf + state->buflen, 0, BLAKE2B_BLOCKBYTES - state->buflen);
	blake2b_compress(state, state->buf);

	/* Avoid temporary buffer and switch the internal output to LE order */
	for (i = 0; i < ARRAY_SIZE(state->h); i++)
		__cpu_to_le64s(&state->h[i]);

	memcpy(out, state->h, digestsize);
	return 0;
}

static struct shash_alg blake2b_algs[] = {
	{
		.base.cra_name		= "blake2b-160",
		.base.cra_driver_name	= "blake2b-160-generic",
		.base.cra_priority	= 100,
		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
		.base.cra_blocksize	= BLAKE2B_BLOCKBYTES,
		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
		.base.cra_module	= THIS_MODULE,
		.digestsize		= BLAKE2B_160_DIGEST_SIZE,
		.setkey			= blake2b_setkey,
		.init			= blake2b_init,
		.update			= blake2b_update,
		.final			= blake2b_final,
		.descsize		= sizeof(struct blake2b_state),
	}, {
		.base.cra_name		= "blake2b-256",
		.base.cra_driver_name	= "blake2b-256-generic",
		.base.cra_priority	= 100,
		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
		.base.cra_blocksize	= BLAKE2B_BLOCKBYTES,
		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
		.base.cra_module	= THIS_MODULE,
		.digestsize		= BLAKE2B_256_DIGEST_SIZE,
		.setkey			= blake2b_setkey,
		.init			= blake2b_init,
		.update			= blake2b_update,
		.final			= blake2b_final,
		.descsize		= sizeof(struct blake2b_state),
	}, {
		.base.cra_name		= "blake2b-384",
		.base.cra_driver_name	= "blake2b-384-generic",
		.base.cra_priority	= 100,
		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
		.base.cra_blocksize	= BLAKE2B_BLOCKBYTES,
		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
		.base.cra_module	= THIS_MODULE,
		.digestsize		= BLAKE2B_384_DIGEST_SIZE,
		.setkey			= blake2b_setkey,
		.init			= blake2b_init,
		.update			= blake2b_update,
		.final			= blake2b_final,
		.descsize		= sizeof(struct blake2b_state),
	}, {
		.base.cra_name		= "blake2b-512",
		.base.cra_driver_name	= "blake2b-512-generic",
		.base.cra_priority	= 100,
		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
		.base.cra_blocksize	= BLAKE2B_BLOCKBYTES,
		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
		.base.cra_module	= THIS_MODULE,
		.digestsize		= BLAKE2B_512_DIGEST_SIZE,
		.setkey			= blake2b_setkey,
		.init			= blake2b_init,
		.update			= blake2b_update,
		.final			= blake2b_final,
		.descsize		= sizeof(struct blake2b_state),
	}
};

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>
	23	#include <linux/string.h>
	24	#include <linux/kernel.h>
	25	#include <linux/bitops.h>
	26	#include <crypto/internal/hash.h>
	27
	28	#define BLAKE2B_160_DIGEST_SIZE (160 / 8)
	29	#define BLAKE2B_256_DIGEST_SIZE (256 / 8)
	30	#define BLAKE2B_384_DIGEST_SIZE (384 / 8)
	31	#define BLAKE2B_512_DIGEST_SIZE (512 / 8)
	32
	33	enum blake2b_constant {
	34	BLAKE2B_BLOCKBYTES = 128,
91d68933	35	BLAKE2B_KEYBYTES = 64,
91d68933 DS	36	};
	37
	38	struct blake2b_state {
	39	u64 h[8];
	40	u64 t[2];
	41	u64 f[2];
	42	u8 buf[BLAKE2B_BLOCKBYTES];
	43	size_t buflen;
91d68933 DS	44	};
91d68933 DS	45
91d68933 DS	46	static const u64 blake2b_IV[8] = {
	47	0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL,
	48	0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL,
	49	0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
	50	0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL
	51	};
	52
	53	static const u8 blake2b_sigma[12][16] = {
	54	{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
	55	{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 },
	56	{ 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 },
	57	{ 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 },
	58	{ 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 },
	59	{ 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 },
	60	{ 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 },
	61	{ 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 },
	62	{ 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 },
	63	{ 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0 },
	64	{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
	65	{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }
	66	};
	67
91d68933 DS	68	static void blake2b_increment_counter(struct blake2b_state *S, const u64 inc)
	69	{
	70	S->t[0] += inc;
	71	S->t[1] += (S->t[0] < inc);
	72	}
	73
91d68933 DS	74	#define G(r,i,a,b,c,d) \
	75	do { \
	76	a = a + b + m[blake2b_sigma[r][2*i+0]]; \
	77	d = ror64(d ^ a, 32); \
	78	c = c + d; \
	79	b = ror64(b ^ c, 24); \
	80	a = a + b + m[blake2b_sigma[r][2*i+1]]; \
	81	d = ror64(d ^ a, 16); \
	82	c = c + d; \
	83	b = ror64(b ^ c, 63); \
	84	} while (0)
	85
	86	#define ROUND(r) \
	87	do { \
	88	G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
	89	G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
	90	G(r,2,v[ 2],v[ 6],v[10],v[14]); \
	91	G(r,3,v[ 3],v[ 7],v[11],v[15]); \
	92	G(r,4,v[ 0],v[ 5],v[10],v[15]); \
	93	G(r,5,v[ 1],v[ 6],v[11],v[12]); \
	94	G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
	95	G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
	96	} while (0)
	97
	98	static void blake2b_compress(struct blake2b_state *S,
	99	const u8 block[BLAKE2B_BLOCKBYTES])
	100	{
	101	u64 m[16];
	102	u64 v[16];
	103	size_t i;
	104
	105	for (i = 0; i < 16; ++i)
	106	m[i] = get_unaligned_le64(block + i * sizeof(m[i]));
	107
	108	for (i = 0; i < 8; ++i)
	109	v[i] = S->h[i];
	110
	111	v[ 8] = blake2b_IV[0];
	112	v[ 9] = blake2b_IV[1];
	113	v[10] = blake2b_IV[2];
	114	v[11] = blake2b_IV[3];
	115	v[12] = blake2b_IV[4] ^ S->t[0];
	116	v[13] = blake2b_IV[5] ^ S->t[1];
	117	v[14] = blake2b_IV[6] ^ S->f[0];
	118	v[15] = blake2b_IV[7] ^ S->f[1];
	119
	120	ROUND(0);
	121	ROUND(1);
	122	ROUND(2);
	123	ROUND(3);
	124	ROUND(4);
	125	ROUND(5);
	126	ROUND(6);
	127	ROUND(7);
	128	ROUND(8);
	129	ROUND(9);
	130	ROUND(10);
	131	ROUND(11);
0c0408e8 AB	132	#ifdef CONFIG_CC_IS_CLANG
	133	#pragma nounroll /* https://bugs.llvm.org/show_bug.cgi?id=45803 */
	134	#endif
91d68933 DS	135	for (i = 0; i < 8; ++i)
	136	S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
	137	}
	138
	139	#undef G
	140	#undef ROUND
	141
c433a1a8	142	struct blake2b_tfm_ctx {
91d68933 DS	143	u8 key[BLAKE2B_KEYBYTES];
	144	unsigned int keylen;
	145	};
	146
c433a1a8 DS	147	static int blake2b_setkey(struct crypto_shash tfm, const u8 key,
c433a1a8 DS	148	unsigned int keylen)
91d68933	149	{
c433a1a8	150	struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(tfm);
91d68933	151
674f368a	152	if (keylen == 0 \|\| keylen > BLAKE2B_KEYBYTES)
91d68933	153	return -EINVAL;
91d68933	154
c433a1a8 DS	155	memcpy(tctx->key, key, keylen);
c433a1a8 DS	156	tctx->keylen = keylen;
91d68933 DS	157
	158	return 0;
	159	}
	160
e3749695	161	static int blake2b_init(struct shash_desc *desc)
91d68933	162	{
c433a1a8	163	struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
91d68933 DS	164	struct blake2b_state *state = shash_desc_ctx(desc);
	165	const int digestsize = crypto_shash_digestsize(desc->tfm);
	166
e3749695 DS	167	memset(state, 0, sizeof(*state));
	168	memcpy(state->h, blake2b_IV, sizeof(state->h));
	169
	170	/* Parameter block is all zeros except index 0, no xor for 1..7 */
c433a1a8	171	state->h[0] ^= 0x01010000 \| tctx->keylen << 8 \| digestsize;
e3749695	172
c433a1a8	173	if (tctx->keylen) {
e87e484d DS	174	/*
	175	* Prefill the buffer with the key, next call to _update or
	176	* _final will process it
	177	*/
c433a1a8	178	memcpy(state->buf, tctx->key, tctx->keylen);
e87e484d	179	state->buflen = BLAKE2B_BLOCKBYTES;
e3749695	180	}
91d68933 DS	181	return 0;
	182	}
	183
0b4b5f10 DS	184	static int blake2b_update(struct shash_desc desc, const u8 in,
0b4b5f10 DS	185	unsigned int inlen)
91d68933 DS	186	{
91d68933 DS	187	struct blake2b_state *state = shash_desc_ctx(desc);
0b4b5f10 DS	188	const size_t left = state->buflen;
	189	const size_t fill = BLAKE2B_BLOCKBYTES - left;
	190
	191	if (!inlen)
	192	return 0;
	193
	194	if (inlen > fill) {
	195	state->buflen = 0;
	196	/* Fill buffer */
	197	memcpy(state->buf + left, in, fill);
	198	blake2b_increment_counter(state, BLAKE2B_BLOCKBYTES);
	199	/* Compress */
	200	blake2b_compress(state, state->buf);
	201	in += fill;
	202	inlen -= fill;
	203	while (inlen > BLAKE2B_BLOCKBYTES) {
	204	blake2b_increment_counter(state, BLAKE2B_BLOCKBYTES);
	205	blake2b_compress(state, in);
	206	in += BLAKE2B_BLOCKBYTES;
	207	inlen -= BLAKE2B_BLOCKBYTES;
	208	}
	209	}
	210	memcpy(state->buf + state->buflen, in, inlen);
	211	state->buflen += inlen;
91d68933	212
91d68933 DS	213	return 0;
	214	}
	215
086db43b	216	static int blake2b_final(struct shash_desc desc, u8 out)
91d68933 DS	217	{
	218	struct blake2b_state *state = shash_desc_ctx(desc);
	219	const int digestsize = crypto_shash_digestsize(desc->tfm);
086db43b DS	220	size_t i;
	221
	222	blake2b_increment_counter(state, state->buflen);
a2e4bdce DS	223	/* Set last block */
a2e4bdce DS	224	state->f[0] = (u64)-1;
086db43b DS	225	/* Padding */
	226	memset(state->buf + state->buflen, 0, BLAKE2B_BLOCKBYTES - state->buflen);
	227	blake2b_compress(state, state->buf);
	228
	229	/* Avoid temporary buffer and switch the internal output to LE order */
	230	for (i = 0; i < ARRAY_SIZE(state->h); i++)
	231	__cpu_to_le64s(&state->h[i]);
91d68933	232
086db43b	233	memcpy(out, state->h, digestsize);
91d68933 DS	234	return 0;
	235	}
	236
	237	static struct shash_alg blake2b_algs[] = {
	238	{
	239	.base.cra_name = "blake2b-160",
	240	.base.cra_driver_name = "blake2b-160-generic",
	241	.base.cra_priority = 100,
	242	.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
	243	.base.cra_blocksize = BLAKE2B_BLOCKBYTES,
c433a1a8	244	.base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx),
91d68933 DS	245	.base.cra_module = THIS_MODULE,
91d68933 DS	246	.digestsize = BLAKE2B_160_DIGEST_SIZE,
c433a1a8	247	.setkey = blake2b_setkey,
e3749695	248	.init = blake2b_init,
0b4b5f10	249	.update = blake2b_update,
086db43b	250	.final = blake2b_final,
91d68933 DS	251	.descsize = sizeof(struct blake2b_state),
	252	}, {
	253	.base.cra_name = "blake2b-256",
	254	.base.cra_driver_name = "blake2b-256-generic",
	255	.base.cra_priority = 100,
	256	.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
	257	.base.cra_blocksize = BLAKE2B_BLOCKBYTES,
c433a1a8	258	.base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx),
91d68933 DS	259	.base.cra_module = THIS_MODULE,
91d68933 DS	260	.digestsize = BLAKE2B_256_DIGEST_SIZE,
c433a1a8	261	.setkey = blake2b_setkey,
e3749695	262	.init = blake2b_init,
0b4b5f10	263	.update = blake2b_update,
086db43b	264	.final = blake2b_final,
91d68933 DS	265	.descsize = sizeof(struct blake2b_state),
	266	}, {
	267	.base.cra_name = "blake2b-384",
	268	.base.cra_driver_name = "blake2b-384-generic",
	269	.base.cra_priority = 100,
	270	.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
	271	.base.cra_blocksize = BLAKE2B_BLOCKBYTES,
c433a1a8	272	.base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx),
91d68933 DS	273	.base.cra_module = THIS_MODULE,
91d68933 DS	274	.digestsize = BLAKE2B_384_DIGEST_SIZE,
c433a1a8	275	.setkey = blake2b_setkey,
e3749695	276	.init = blake2b_init,
0b4b5f10	277	.update = blake2b_update,
086db43b	278	.final = blake2b_final,
91d68933 DS	279	.descsize = sizeof(struct blake2b_state),
	280	}, {
	281	.base.cra_name = "blake2b-512",
	282	.base.cra_driver_name = "blake2b-512-generic",
	283	.base.cra_priority = 100,
	284	.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
	285	.base.cra_blocksize = BLAKE2B_BLOCKBYTES,
c433a1a8	286	.base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx),
91d68933 DS	287	.base.cra_module = THIS_MODULE,
91d68933 DS	288	.digestsize = BLAKE2B_512_DIGEST_SIZE,
c433a1a8	289	.setkey = blake2b_setkey,
e3749695	290	.init = blake2b_init,
0b4b5f10	291	.update = blake2b_update,
086db43b	292	.final = blake2b_final,
91d68933 DS	293	.descsize = sizeof(struct blake2b_state),
	294	}
	295	};
	296
	297	static int __init blake2b_mod_init(void)
	298	{
91d68933 DS	299	return crypto_register_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
	300	}
	301
	302	static void __exit blake2b_mod_fini(void)
	303	{
	304	crypto_unregister_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
	305	}
	306
	307	subsys_initcall(blake2b_mod_init);
	308	module_exit(blake2b_mod_fini);
	309
	310	MODULE_AUTHOR("David Sterba <kdave@kernel.org>");
	311	MODULE_DESCRIPTION("BLAKE2b generic implementation");
	312	MODULE_LICENSE("GPL");
	313	MODULE_ALIAS_CRYPTO("blake2b-160");
	314	MODULE_ALIAS_CRYPTO("blake2b-160-generic");
	315	MODULE_ALIAS_CRYPTO("blake2b-256");
	316	MODULE_ALIAS_CRYPTO("blake2b-256-generic");
	317	MODULE_ALIAS_CRYPTO("blake2b-384");
	318	MODULE_ALIAS_CRYPTO("blake2b-384-generic");
	319	MODULE_ALIAS_CRYPTO("blake2b-512");
	320	MODULE_ALIAS_CRYPTO("blake2b-512-generic");