1 // SPDX-License-Identifier: (GPL-2.0-only OR Apache-2.0)
3 * BLAKE2b reference source code package - reference C implementations
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:
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
13 * More information about the BLAKE2 hash function can be found at
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
21 #include <asm/unaligned.h>
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/bitops.h>
25 #include <crypto/internal/blake2b.h>
26 #include <crypto/internal/hash.h>
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 }
43 static void blake2b_increment_counter(struct blake2b_state *S, const u64 inc)
46 S->t[1] += (S->t[0] < inc);
49 #define G(r,i,a,b,c,d) \
51 a = a + b + m[blake2b_sigma[r][2*i+0]]; \
52 d = ror64(d ^ a, 32); \
54 b = ror64(b ^ c, 24); \
55 a = a + b + m[blake2b_sigma[r][2*i+1]]; \
56 d = ror64(d ^ a, 16); \
58 b = ror64(b ^ c, 63); \
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]); \
73 static void blake2b_compress_one_generic(struct blake2b_state *S,
74 const u8 block[BLAKE2B_BLOCK_SIZE])
80 for (i = 0; i < 16; ++i)
81 m[i] = get_unaligned_le64(block + i * sizeof(m[i]));
83 for (i = 0; i < 8; ++i)
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];
107 #ifdef CONFIG_CC_IS_CLANG
108 #pragma nounroll /* https://bugs.llvm.org/show_bug.cgi?id=45803 */
110 for (i = 0; i < 8; ++i)
111 S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
117 void blake2b_compress_generic(struct blake2b_state *state,
118 const u8 *block, size_t nblocks, u32 inc)
121 blake2b_increment_counter(state, inc);
122 blake2b_compress_one_generic(state, block);
123 block += BLAKE2B_BLOCK_SIZE;
126 EXPORT_SYMBOL(blake2b_compress_generic);
128 static int crypto_blake2b_update_generic(struct shash_desc *desc,
129 const u8 *in, unsigned int inlen)
131 return crypto_blake2b_update(desc, in, inlen, blake2b_compress_generic);
134 static int crypto_blake2b_final_generic(struct shash_desc *desc, u8 *out)
136 return crypto_blake2b_final(desc, out, blake2b_compress_generic);
139 #define BLAKE2B_ALG(name, driver_name, digest_size) \
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), \
156 static struct shash_alg blake2b_algs[] = {
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),
167 static int __init blake2b_mod_init(void)
169 return crypto_register_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
172 static void __exit blake2b_mod_fini(void)
174 crypto_unregister_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
177 subsys_initcall(blake2b_mod_init);
178 module_exit(blake2b_mod_fini);
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");