1// SPDX-License-Identifier: GPL-2.0 OR MIT
 2/*
 3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 4 *
 5 * This is an implementation of the BLAKE2s hash and PRF functions.
 6 *
 7 * Information: https://blake2.net/
 8 *
 9 */
10
11#include <crypto/internal/blake2s.h>
12#include <linux/types.h>
13#include <linux/string.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/bug.h>
18
19#if IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S)
20#  define blake2s_compress blake2s_compress_arch
21#else
22#  define blake2s_compress blake2s_compress_generic
23#endif
24
25void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen)
26{
27	__blake2s_update(state, in, inlen, blake2s_compress);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
28}
29EXPORT_SYMBOL(blake2s_update);
30
31void blake2s_final(struct blake2s_state *state, u8 *out)
32{
33	WARN_ON(IS_ENABLED(DEBUG) && !out);
34	__blake2s_final(state, out, blake2s_compress);
 
 
 
 
 
35	memzero_explicit(state, sizeof(*state));
36}
37EXPORT_SYMBOL(blake2s_final);
38
39void blake2s256_hmac(u8 *out, const u8 *in, const u8 *key, const size_t inlen,
40		     const size_t keylen)
41{
42	struct blake2s_state state;
43	u8 x_key[BLAKE2S_BLOCK_SIZE] __aligned(__alignof__(u32)) = { 0 };
44	u8 i_hash[BLAKE2S_HASH_SIZE] __aligned(__alignof__(u32));
45	int i;
46
47	if (keylen > BLAKE2S_BLOCK_SIZE) {
48		blake2s_init(&state, BLAKE2S_HASH_SIZE);
49		blake2s_update(&state, key, keylen);
50		blake2s_final(&state, x_key);
51	} else
52		memcpy(x_key, key, keylen);
53
54	for (i = 0; i < BLAKE2S_BLOCK_SIZE; ++i)
55		x_key[i] ^= 0x36;
56
57	blake2s_init(&state, BLAKE2S_HASH_SIZE);
58	blake2s_update(&state, x_key, BLAKE2S_BLOCK_SIZE);
59	blake2s_update(&state, in, inlen);
60	blake2s_final(&state, i_hash);
61
62	for (i = 0; i < BLAKE2S_BLOCK_SIZE; ++i)
63		x_key[i] ^= 0x5c ^ 0x36;
64
65	blake2s_init(&state, BLAKE2S_HASH_SIZE);
66	blake2s_update(&state, x_key, BLAKE2S_BLOCK_SIZE);
67	blake2s_update(&state, i_hash, BLAKE2S_HASH_SIZE);
68	blake2s_final(&state, i_hash);
69
70	memcpy(out, i_hash, BLAKE2S_HASH_SIZE);
71	memzero_explicit(x_key, BLAKE2S_BLOCK_SIZE);
72	memzero_explicit(i_hash, BLAKE2S_HASH_SIZE);
73}
74EXPORT_SYMBOL(blake2s256_hmac);
75
76static int __init mod_init(void)
77{
78	if (!IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS) &&
79	    WARN_ON(!blake2s_selftest()))
80		return -ENODEV;
81	return 0;
82}
83
84static void __exit mod_exit(void)
85{
86}
87
88module_init(mod_init);
89module_exit(mod_exit);
90MODULE_LICENSE("GPL v2");
91MODULE_DESCRIPTION("BLAKE2s hash function");
92MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>");

 1// SPDX-License-Identifier: GPL-2.0 OR MIT
 2/*
 3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 4 *
 5 * This is an implementation of the BLAKE2s hash and PRF functions.
 6 *
 7 * Information: https://blake2.net/
 8 *
 9 */
10
11#include <crypto/internal/blake2s.h>
12#include <linux/types.h>
13#include <linux/string.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/bug.h>
18
19static inline void blake2s_set_lastblock(struct blake2s_state *state)
20{
21	state->f[0] = -1;
22}
 
23
24void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen)
25{
26	const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen;
27
28	if (unlikely(!inlen))
29		return;
30	if (inlen > fill) {
31		memcpy(state->buf + state->buflen, in, fill);
32		blake2s_compress(state, state->buf, 1, BLAKE2S_BLOCK_SIZE);
33		state->buflen = 0;
34		in += fill;
35		inlen -= fill;
36	}
37	if (inlen > BLAKE2S_BLOCK_SIZE) {
38		const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE);
39		blake2s_compress(state, in, nblocks - 1, BLAKE2S_BLOCK_SIZE);
40		in += BLAKE2S_BLOCK_SIZE * (nblocks - 1);
41		inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1);
42	}
43	memcpy(state->buf + state->buflen, in, inlen);
44	state->buflen += inlen;
45}
46EXPORT_SYMBOL(blake2s_update);
47
48void blake2s_final(struct blake2s_state *state, u8 *out)
49{
50	WARN_ON(IS_ENABLED(DEBUG) && !out);
51	blake2s_set_lastblock(state);
52	memset(state->buf + state->buflen, 0,
53	       BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */
54	blake2s_compress(state, state->buf, 1, state->buflen);
55	cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
56	memcpy(out, state->h, state->outlen);
57	memzero_explicit(state, sizeof(*state));
58}
59EXPORT_SYMBOL(blake2s_final);
60
61static int __init blake2s_mod_init(void)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
62{
63	if (!IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS) &&
64	    WARN_ON(!blake2s_selftest()))
65		return -ENODEV;
66	return 0;
67}
68
69module_init(blake2s_mod_init);
 
 
 
 
 
70MODULE_LICENSE("GPL v2");
71MODULE_DESCRIPTION("BLAKE2s hash function");
72MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>");