aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/generic/backport-5.4/080-wireguard-0023-crypto-blake2s-implement-generic-shash-driver.patch
blob: e25edf5dda84ddcc2fc886220cb8928700e27f12 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ardb@kernel.org>
Date: Fri, 8 Nov 2019 13:22:30 +0100
Subject: [PATCH] crypto: blake2s - implement generic shash driver

commit 7f9b0880925f1f9d7d59504ea0892d2ae9cfc233 upstream.

Wire up our newly added Blake2s implementation via the shash API.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 crypto/Kconfig                    |  18 ++++
 crypto/Makefile                   |   1 +
 crypto/blake2s_generic.c          | 171 ++++++++++++++++++++++++++++++
 include/crypto/internal/blake2s.h |   5 +
 4 files changed, 195 insertions(+)
 create mode 100644 crypto/blake2s_generic.c

--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -639,6 +639,24 @@ config CRYPTO_XXHASH
 	  xxHash non-cryptographic hash algorithm. Extremely fast, working at
 	  speeds close to RAM limits.
 
+config CRYPTO_BLAKE2S
+	tristate "BLAKE2s digest algorithm"
+	select CRYPTO_LIB_BLAKE2S_GENERIC
+	select CRYPTO_HASH
+	help
+	  Implementation of cryptographic hash function BLAKE2s
+	  optimized for 8-32bit platforms and can produce digests of any size
+	  between 1 to 32.  The keyed hash is also implemented.
+
+	  This module provides the following algorithms:
+
+	  - blake2s-128
+	  - blake2s-160
+	  - blake2s-224
+	  - blake2s-256
+
+	  See https://blake2.net for further information.
+
 config CRYPTO_CRCT10DIF
 	tristate "CRCT10DIF algorithm"
 	select CRYPTO_HASH
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -74,6 +74,7 @@ obj-$(CONFIG_CRYPTO_STREEBOG) += streebo
 obj-$(CONFIG_CRYPTO_WP512) += wp512.o
 CFLAGS_wp512.o := $(call cc-option,-fno-schedule-insns)  # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79149
 obj-$(CONFIG_CRYPTO_TGR192) += tgr192.o
+obj-$(CONFIG_CRYPTO_BLAKE2S) += blake2s_generic.o
 obj-$(CONFIG_CRYPTO_GF128MUL) += gf128mul.o
 obj-$(CONFIG_CRYPTO_ECB) += ecb.o
 obj-$(CONFIG_CRYPTO_CBC) += cbc.o
--- /dev/null
+++ b/crypto/blake2s_generic.c
@@ -0,0 +1,171 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ */
+
+#include <crypto/internal/blake2s.h>
+#include <crypto/internal/simd.h>
+#include <crypto/internal/hash.h>
+
+#include <linux/types.h>
+#include <linux/jump_label.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+static int crypto_blake2s_setkey(struct crypto_shash *tfm, const u8 *key,
+				 unsigned int keylen)
+{
+	struct blake2s_tfm_ctx *tctx = crypto_shash_ctx(tfm);
+
+	if (keylen == 0 || keylen > BLAKE2S_KEY_SIZE) {
+		crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+		return -EINVAL;
+	}
+
+	memcpy(tctx->key, key, keylen);
+	tctx->keylen = keylen;
+
+	return 0;
+}
+
+static int crypto_blake2s_init(struct shash_desc *desc)
+{
+	struct blake2s_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
+	struct blake2s_state *state = shash_desc_ctx(desc);
+	const int outlen = crypto_shash_digestsize(desc->tfm);
+
+	if (tctx->keylen)
+		blake2s_init_key(state, outlen, tctx->key, tctx->keylen);
+	else
+		blake2s_init(state, outlen);
+
+	return 0;
+}
+
+static int crypto_blake2s_update(struct shash_desc *desc, const u8 *in,
+				 unsigned int inlen)
+{
+	struct blake2s_state *state = shash_desc_ctx(desc);
+	const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen;
+
+	if (unlikely(!inlen))
+		return 0;
+	if (inlen > fill) {
+		memcpy(state->buf + state->buflen, in, fill);
+		blake2s_compress_generic(state, state->buf, 1, BLAKE2S_BLOCK_SIZE);
+		state->buflen = 0;
+		in += fill;
+		inlen -= fill;
+	}
+	if (inlen > BLAKE2S_BLOCK_SIZE) {
+		const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE);
+		/* Hash one less (full) block than strictly possible */
+		blake2s_compress_generic(state, in, nblocks - 1, BLAKE2S_BLOCK_SIZE);
+		in += BLAKE2S_BLOCK_SIZE * (nblocks - 1);
+		inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1);
+	}
+	memcpy(state->buf + state->buflen, in, inlen);
+	state->buflen += inlen;
+
+	return 0;
+}
+
+static int crypto_blake2s_final(struct shash_desc *desc, u8 *out)
+{
+	struct blake2s_state *state = shash_desc_ctx(desc);
+
+	blake2s_set_lastblock(state);
+	memset(state->buf + state->buflen, 0,
+	       BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */
+	blake2s_compress_generic(state, state->buf, 1, state->buflen);
+	cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
+	memcpy(out, state->h, state->outlen);
+	memzero_explicit(state, sizeof(*state));
+
+	return 0;
+}
+
+static struct shash_alg blake2s_algs[] = {{
+	.base.cra_name		= "blake2s-128",
+	.base.cra_driver_name	= "blake2s-128-generic",
+	.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
+	.base.cra_ctxsize	= sizeof(struct blake2s_tfm_ctx),
+	.base.cra_priority	= 200,
+	.base.cra_blocksize     = BLAKE2S_BLOCK_SIZE,
+	.base.cra_module	= THIS_MODULE,
+
+	.digestsize		= BLAKE2S_128_HASH_SIZE,
+	.setkey			= crypto_blake2s_setkey,
+	.init			= crypto_blake2s_init,
+	.update			= crypto_blake2s_update,
+	.final			= crypto_blake2s_final,
+	.descsize		= sizeof(struct blake2s_state),
+}, {
+	.base.cra_name		= "blake2s-160",
+	.base.cra_driver_name	= "blake2s-160-generic",
+	.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
+	.base.cra_ctxsize	= sizeof(struct blake2s_tfm_ctx),
+	.base.cra_priority	= 200,
+	.base.cra_blocksize     = BLAKE2S_BLOCK_SIZE,
+	.base.cra_module	= THIS_MODULE,
+
+	.digestsize		= BLAKE2S_160_HASH_SIZE,
+	.setkey			= crypto_blake2s_setkey,
+	.init			= crypto_blake2s_init,
+	.update			= crypto_blake2s_update,
+	.final			= crypto_blake2s_final,
+	.descsize		= sizeof(struct blake2s_state),
+}, {
+	.base.cra_name		= "blake2s-224",
+	.base.cra_driver_name	= "blake2s-224-generic",
+	.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
+	.base.cra_ctxsize	= sizeof(struct blake2s_tfm_ctx),
+	.base.cra_priority	= 200,
+	.base.cra_blocksize     = BLAKE2S_BLOCK_SIZE,
+	.base.cra_module	= THIS_MODULE,
+
+	.digestsize		= BLAKE2S_224_HASH_SIZE,
+	.setkey			= crypto_blake2s_setkey,
+	.init			= crypto_blake2s_init,
+	.update			= crypto_blake2s_update,
+	.final			= crypto_blake2s_final,
+	.descsize		= sizeof(struct blake2s_state),
+}, {
+	.base.cra_name		= "blake2s-256",
+	.base.cra_driver_name	= "blake2s-256-generic",
+	.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
+	.base.cra_ctxsize	= sizeof(struct blake2s_tfm_ctx),
+	.base.cra_priority	= 200,
+	.base.cra_blocksize     = BLAKE2S_BLOCK_SIZE,
+	.base.cra_module	= THIS_MODULE,
+
+	.digestsize		= BLAKE2S_256_HASH_SIZE,
+	.setkey			= crypto_blake2s_setkey,
+	.init			= crypto_blake2s_init,
+	.update			= crypto_blake2s_update,
+	.final			= crypto_blake2s_final,
+	.descsize		= sizeof(struct blake2s_state),
+}};
+
+static int __init blake2s_mod_init(void)
+{
+	return crypto_register_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
+}
+
+static void __exit blake2s_mod_exit(void)
+{
+	crypto_unregister_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
+}
+
+subsys_initcall(blake2s_mod_init);
+module_exit(blake2s_mod_exit);
+
+MODULE_ALIAS_CRYPTO("blake2s-128");
+MODULE_ALIAS_CRYPTO("blake2s-128-generic");
+MODULE_ALIAS_CRYPTO("blake2s-160");
+MODULE_ALIAS_CRYPTO("blake2s-160-generic");
+MODULE_ALIAS_CRYPTO("blake2s-224");
+MODULE_ALIAS_CRYPTO("blake2s-224-generic");
+MODULE_ALIAS_CRYPTO("blake2s-256");
+MODULE_ALIAS_CRYPTO("blake2s-256-generic");
+MODULE_LICENSE("GPL v2");
--- a/include/crypto/internal/blake2s.h
+++ b/include/crypto/internal/blake2s.h
@@ -5,6 +5,11 @@
 
 #include <crypto/blake2s.h>
 
+struct blake2s_tfm_ctx {
+	u8 key[BLAKE2S_KEY_SIZE];
+	unsigned int keylen;
+};
+
 void blake2s_compress_generic(struct blake2s_state *state,const u8 *block,
 			      size_t nblocks, const u32 inc);