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v6.13.7
  1// SPDX-License-Identifier: (GPL-2.0-only OR Apache-2.0)
  2/*
  3 * Generic implementation of the BLAKE2b digest algorithm.  Based on the BLAKE2b
  4 * reference implementation, but it has been heavily modified for use in the
  5 * kernel.  The reference implementation was:
  6 *
  7 *	Copyright 2012, Samuel Neves <sneves@dei.uc.pt>.  You may use this under
  8 *	the terms of the CC0, the OpenSSL Licence, or the Apache Public License
  9 *	2.0, at your option.  The terms of these licenses can be found at:
 10 *
 11 *	- CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
 12 *	- OpenSSL license   : https://www.openssl.org/source/license.html
 13 *	- Apache 2.0        : https://www.apache.org/licenses/LICENSE-2.0
 14 *
 15 * More information about BLAKE2 can be found at https://blake2.net.
 
 
 
 
 
 16 */
 17
 18#include <linux/unaligned.h>
 19#include <linux/module.h>
 
 20#include <linux/kernel.h>
 21#include <linux/bitops.h>
 22#include <crypto/internal/blake2b.h>
 23#include <crypto/internal/hash.h>
 24
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 25static const u8 blake2b_sigma[12][16] = {
 26	{  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 },
 27	{ 14, 10,  4,  8,  9, 15, 13,  6,  1, 12,  0,  2, 11,  7,  5,  3 },
 28	{ 11,  8, 12,  0,  5,  2, 15, 13, 10, 14,  3,  6,  7,  1,  9,  4 },
 29	{  7,  9,  3,  1, 13, 12, 11, 14,  2,  6,  5, 10,  4,  0, 15,  8 },
 30	{  9,  0,  5,  7,  2,  4, 10, 15, 14,  1, 11, 12,  6,  8,  3, 13 },
 31	{  2, 12,  6, 10,  0, 11,  8,  3,  4, 13,  7,  5, 15, 14,  1,  9 },
 32	{ 12,  5,  1, 15, 14, 13,  4, 10,  0,  7,  6,  3,  9,  2,  8, 11 },
 33	{ 13, 11,  7, 14, 12,  1,  3,  9,  5,  0, 15,  4,  8,  6,  2, 10 },
 34	{  6, 15, 14,  9, 11,  3,  0,  8, 12,  2, 13,  7,  1,  4, 10,  5 },
 35	{ 10,  2,  8,  4,  7,  6,  1,  5, 15, 11,  9, 14,  3, 12, 13,  0 },
 36	{  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 },
 37	{ 14, 10,  4,  8,  9, 15, 13,  6,  1, 12,  0,  2, 11,  7,  5,  3 }
 38};
 39
 40static void blake2b_increment_counter(struct blake2b_state *S, const u64 inc)
 41{
 42	S->t[0] += inc;
 43	S->t[1] += (S->t[0] < inc);
 44}
 45
 46#define G(r,i,a,b,c,d)                                  \
 47	do {                                            \
 48		a = a + b + m[blake2b_sigma[r][2*i+0]]; \
 49		d = ror64(d ^ a, 32);                   \
 50		c = c + d;                              \
 51		b = ror64(b ^ c, 24);                   \
 52		a = a + b + m[blake2b_sigma[r][2*i+1]]; \
 53		d = ror64(d ^ a, 16);                   \
 54		c = c + d;                              \
 55		b = ror64(b ^ c, 63);                   \
 56	} while (0)
 57
 58#define ROUND(r)                                \
 59	do {                                    \
 60		G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
 61		G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
 62		G(r,2,v[ 2],v[ 6],v[10],v[14]); \
 63		G(r,3,v[ 3],v[ 7],v[11],v[15]); \
 64		G(r,4,v[ 0],v[ 5],v[10],v[15]); \
 65		G(r,5,v[ 1],v[ 6],v[11],v[12]); \
 66		G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
 67		G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
 68	} while (0)
 69
 70static void blake2b_compress_one_generic(struct blake2b_state *S,
 71					 const u8 block[BLAKE2B_BLOCK_SIZE])
 72{
 73	u64 m[16];
 74	u64 v[16];
 75	size_t i;
 76
 77	for (i = 0; i < 16; ++i)
 78		m[i] = get_unaligned_le64(block + i * sizeof(m[i]));
 79
 80	for (i = 0; i < 8; ++i)
 81		v[i] = S->h[i];
 82
 83	v[ 8] = BLAKE2B_IV0;
 84	v[ 9] = BLAKE2B_IV1;
 85	v[10] = BLAKE2B_IV2;
 86	v[11] = BLAKE2B_IV3;
 87	v[12] = BLAKE2B_IV4 ^ S->t[0];
 88	v[13] = BLAKE2B_IV5 ^ S->t[1];
 89	v[14] = BLAKE2B_IV6 ^ S->f[0];
 90	v[15] = BLAKE2B_IV7 ^ S->f[1];
 91
 92	ROUND(0);
 93	ROUND(1);
 94	ROUND(2);
 95	ROUND(3);
 96	ROUND(4);
 97	ROUND(5);
 98	ROUND(6);
 99	ROUND(7);
100	ROUND(8);
101	ROUND(9);
102	ROUND(10);
103	ROUND(11);
104#ifdef CONFIG_CC_IS_CLANG
105#pragma nounroll /* https://llvm.org/pr45803 */
106#endif
107	for (i = 0; i < 8; ++i)
108		S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
109}
110
111#undef G
112#undef ROUND
113
114void blake2b_compress_generic(struct blake2b_state *state,
115			      const u8 *block, size_t nblocks, u32 inc)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
116{
117	do {
118		blake2b_increment_counter(state, inc);
119		blake2b_compress_one_generic(state, block);
120		block += BLAKE2B_BLOCK_SIZE;
121	} while (--nblocks);
122}
123EXPORT_SYMBOL(blake2b_compress_generic);
124
125static int crypto_blake2b_update_generic(struct shash_desc *desc,
126					 const u8 *in, unsigned int inlen)
127{
128	return crypto_blake2b_update(desc, in, inlen, blake2b_compress_generic);
129}
130
131static int crypto_blake2b_final_generic(struct shash_desc *desc, u8 *out)
132{
133	return crypto_blake2b_final(desc, out, blake2b_compress_generic);
134}
135
136#define BLAKE2B_ALG(name, driver_name, digest_size)			\
137	{								\
138		.base.cra_name		= name,				\
139		.base.cra_driver_name	= driver_name,			\
140		.base.cra_priority	= 100,				\
141		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,	\
142		.base.cra_blocksize	= BLAKE2B_BLOCK_SIZE,		\
143		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx), \
144		.base.cra_module	= THIS_MODULE,			\
145		.digestsize		= digest_size,			\
146		.setkey			= crypto_blake2b_setkey,	\
147		.init			= crypto_blake2b_init,		\
148		.update			= crypto_blake2b_update_generic, \
149		.final			= crypto_blake2b_final_generic,	\
150		.descsize		= sizeof(struct blake2b_state),	\
151	}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
152
153static struct shash_alg blake2b_algs[] = {
154	BLAKE2B_ALG("blake2b-160", "blake2b-160-generic",
155		    BLAKE2B_160_HASH_SIZE),
156	BLAKE2B_ALG("blake2b-256", "blake2b-256-generic",
157		    BLAKE2B_256_HASH_SIZE),
158	BLAKE2B_ALG("blake2b-384", "blake2b-384-generic",
159		    BLAKE2B_384_HASH_SIZE),
160	BLAKE2B_ALG("blake2b-512", "blake2b-512-generic",
161		    BLAKE2B_512_HASH_SIZE),
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
162};
163
164static int __init blake2b_mod_init(void)
165{
166	return crypto_register_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
167}
168
169static void __exit blake2b_mod_fini(void)
170{
171	crypto_unregister_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
172}
173
174subsys_initcall(blake2b_mod_init);
175module_exit(blake2b_mod_fini);
176
177MODULE_AUTHOR("David Sterba <kdave@kernel.org>");
178MODULE_DESCRIPTION("BLAKE2b generic implementation");
179MODULE_LICENSE("GPL");
180MODULE_ALIAS_CRYPTO("blake2b-160");
181MODULE_ALIAS_CRYPTO("blake2b-160-generic");
182MODULE_ALIAS_CRYPTO("blake2b-256");
183MODULE_ALIAS_CRYPTO("blake2b-256-generic");
184MODULE_ALIAS_CRYPTO("blake2b-384");
185MODULE_ALIAS_CRYPTO("blake2b-384-generic");
186MODULE_ALIAS_CRYPTO("blake2b-512");
187MODULE_ALIAS_CRYPTO("blake2b-512-generic");
v5.9
  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
 11 * - Apache 2.0        : https://www.apache.org/licenses/LICENSE-2.0
 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
 33enum blake2b_constant {
 34	BLAKE2B_BLOCKBYTES    = 128,
 35	BLAKE2B_KEYBYTES      = 64,
 36};
 37
 38struct blake2b_state {
 39	u64      h[8];
 40	u64      t[2];
 41	u64      f[2];
 42	u8       buf[BLAKE2B_BLOCKBYTES];
 43	size_t   buflen;
 44};
 45
 46static const u64 blake2b_IV[8] = {
 47	0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL,
 48	0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL,
 49	0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
 50	0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL
 51};
 52
 53static 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
 68static 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
 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
 98static 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);
132#ifdef CONFIG_CC_IS_CLANG
133#pragma nounroll /* https://bugs.llvm.org/show_bug.cgi?id=45803 */
134#endif
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
142struct blake2b_tfm_ctx {
143	u8 key[BLAKE2B_KEYBYTES];
144	unsigned int keylen;
145};
146
147static int blake2b_setkey(struct crypto_shash *tfm, const u8 *key,
148			  unsigned int keylen)
149{
150	struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(tfm);
151
152	if (keylen == 0 || keylen > BLAKE2B_KEYBYTES)
153		return -EINVAL;
154
155	memcpy(tctx->key, key, keylen);
156	tctx->keylen = keylen;
157
158	return 0;
159}
160
161static int blake2b_init(struct shash_desc *desc)
162{
163	struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
164	struct blake2b_state *state = shash_desc_ctx(desc);
165	const int digestsize = crypto_shash_digestsize(desc->tfm);
166
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 */
171	state->h[0] ^= 0x01010000 | tctx->keylen << 8 | digestsize;
172
173	if (tctx->keylen) {
174		/*
175		 * Prefill the buffer with the key, next call to _update or
176		 * _final will process it
177		 */
178		memcpy(state->buf, tctx->key, tctx->keylen);
179		state->buflen = BLAKE2B_BLOCKBYTES;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
180	}
181	return 0;
182}
183
184static int blake2b_update(struct shash_desc *desc, const u8 *in,
185			  unsigned int inlen)
186{
187	struct blake2b_state *state = shash_desc_ctx(desc);
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;
212
213	return 0;
214}
215
216static int blake2b_final(struct shash_desc *desc, u8 *out)
217{
218	struct blake2b_state *state = shash_desc_ctx(desc);
219	const int digestsize = crypto_shash_digestsize(desc->tfm);
220	size_t i;
221
222	blake2b_increment_counter(state, state->buflen);
223	/* Set last block */
224	state->f[0] = (u64)-1;
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]);
232
233	memcpy(out, state->h, digestsize);
234	return 0;
235}
236
237static 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,
244		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
245		.base.cra_module	= THIS_MODULE,
246		.digestsize		= BLAKE2B_160_DIGEST_SIZE,
247		.setkey			= blake2b_setkey,
248		.init			= blake2b_init,
249		.update			= blake2b_update,
250		.final			= blake2b_final,
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,
258		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
259		.base.cra_module	= THIS_MODULE,
260		.digestsize		= BLAKE2B_256_DIGEST_SIZE,
261		.setkey			= blake2b_setkey,
262		.init			= blake2b_init,
263		.update			= blake2b_update,
264		.final			= blake2b_final,
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,
272		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
273		.base.cra_module	= THIS_MODULE,
274		.digestsize		= BLAKE2B_384_DIGEST_SIZE,
275		.setkey			= blake2b_setkey,
276		.init			= blake2b_init,
277		.update			= blake2b_update,
278		.final			= blake2b_final,
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,
286		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
287		.base.cra_module	= THIS_MODULE,
288		.digestsize		= BLAKE2B_512_DIGEST_SIZE,
289		.setkey			= blake2b_setkey,
290		.init			= blake2b_init,
291		.update			= blake2b_update,
292		.final			= blake2b_final,
293		.descsize		= sizeof(struct blake2b_state),
294	}
295};
296
297static int __init blake2b_mod_init(void)
298{
299	return crypto_register_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
300}
301
302static void __exit blake2b_mod_fini(void)
303{
304	crypto_unregister_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
305}
306
307subsys_initcall(blake2b_mod_init);
308module_exit(blake2b_mod_fini);
309
310MODULE_AUTHOR("David Sterba <kdave@kernel.org>");
311MODULE_DESCRIPTION("BLAKE2b generic implementation");
312MODULE_LICENSE("GPL");
313MODULE_ALIAS_CRYPTO("blake2b-160");
314MODULE_ALIAS_CRYPTO("blake2b-160-generic");
315MODULE_ALIAS_CRYPTO("blake2b-256");
316MODULE_ALIAS_CRYPTO("blake2b-256-generic");
317MODULE_ALIAS_CRYPTO("blake2b-384");
318MODULE_ALIAS_CRYPTO("blake2b-384-generic");
319MODULE_ALIAS_CRYPTO("blake2b-512");
320MODULE_ALIAS_CRYPTO("blake2b-512-generic");