1 // SPDX-License-Identifier: GPL-2.0 OR MIT
3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
6 #include <crypto/internal/blake2s.h>
7 #include <crypto/internal/simd.h>
8 #include <crypto/internal/hash.h>
10 #include <linux/types.h>
11 #include <linux/jump_label.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
15 #include <asm/cpufeature.h>
16 #include <asm/fpu/api.h>
17 #include <asm/processor.h>
20 asmlinkage void blake2s_compress_ssse3(struct blake2s_state *state,
21 const u8 *block, const size_t nblocks,
23 asmlinkage void blake2s_compress_avx512(struct blake2s_state *state,
24 const u8 *block, const size_t nblocks,
27 static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_ssse3);
28 static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_avx512);
30 void blake2s_compress_arch(struct blake2s_state *state,
31 const u8 *block, size_t nblocks,
34 /* SIMD disables preemption, so relax after processing each page. */
35 BUILD_BUG_ON(PAGE_SIZE / BLAKE2S_BLOCK_SIZE < 8);
37 if (!static_branch_likely(&blake2s_use_ssse3) || !crypto_simd_usable()) {
38 blake2s_compress_generic(state, block, nblocks, inc);
43 const size_t blocks = min_t(size_t, nblocks,
44 PAGE_SIZE / BLAKE2S_BLOCK_SIZE);
47 if (IS_ENABLED(CONFIG_AS_AVX512) &&
48 static_branch_likely(&blake2s_use_avx512))
49 blake2s_compress_avx512(state, block, blocks, inc);
51 blake2s_compress_ssse3(state, block, blocks, inc);
57 block += blocks * BLAKE2S_BLOCK_SIZE;
60 EXPORT_SYMBOL(blake2s_compress_arch);
62 static int crypto_blake2s_setkey(struct crypto_shash *tfm, const u8 *key,
65 struct blake2s_tfm_ctx *tctx = crypto_shash_ctx(tfm);
67 if (keylen == 0 || keylen > BLAKE2S_KEY_SIZE)
70 memcpy(tctx->key, key, keylen);
71 tctx->keylen = keylen;
76 static int crypto_blake2s_init(struct shash_desc *desc)
78 struct blake2s_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
79 struct blake2s_state *state = shash_desc_ctx(desc);
80 const int outlen = crypto_shash_digestsize(desc->tfm);
83 blake2s_init_key(state, outlen, tctx->key, tctx->keylen);
85 blake2s_init(state, outlen);
90 static int crypto_blake2s_update(struct shash_desc *desc, const u8 *in,
93 struct blake2s_state *state = shash_desc_ctx(desc);
94 const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen;
99 memcpy(state->buf + state->buflen, in, fill);
100 blake2s_compress_arch(state, state->buf, 1, BLAKE2S_BLOCK_SIZE);
105 if (inlen > BLAKE2S_BLOCK_SIZE) {
106 const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE);
107 /* Hash one less (full) block than strictly possible */
108 blake2s_compress_arch(state, in, nblocks - 1, BLAKE2S_BLOCK_SIZE);
109 in += BLAKE2S_BLOCK_SIZE * (nblocks - 1);
110 inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1);
112 memcpy(state->buf + state->buflen, in, inlen);
113 state->buflen += inlen;
118 static int crypto_blake2s_final(struct shash_desc *desc, u8 *out)
120 struct blake2s_state *state = shash_desc_ctx(desc);
122 blake2s_set_lastblock(state);
123 memset(state->buf + state->buflen, 0,
124 BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */
125 blake2s_compress_arch(state, state->buf, 1, state->buflen);
126 cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
127 memcpy(out, state->h, state->outlen);
128 memzero_explicit(state, sizeof(*state));
133 static struct shash_alg blake2s_algs[] = {{
134 .base.cra_name = "blake2s-128",
135 .base.cra_driver_name = "blake2s-128-x86",
136 .base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
137 .base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx),
138 .base.cra_priority = 200,
139 .base.cra_blocksize = BLAKE2S_BLOCK_SIZE,
140 .base.cra_module = THIS_MODULE,
142 .digestsize = BLAKE2S_128_HASH_SIZE,
143 .setkey = crypto_blake2s_setkey,
144 .init = crypto_blake2s_init,
145 .update = crypto_blake2s_update,
146 .final = crypto_blake2s_final,
147 .descsize = sizeof(struct blake2s_state),
149 .base.cra_name = "blake2s-160",
150 .base.cra_driver_name = "blake2s-160-x86",
151 .base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
152 .base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx),
153 .base.cra_priority = 200,
154 .base.cra_blocksize = BLAKE2S_BLOCK_SIZE,
155 .base.cra_module = THIS_MODULE,
157 .digestsize = BLAKE2S_160_HASH_SIZE,
158 .setkey = crypto_blake2s_setkey,
159 .init = crypto_blake2s_init,
160 .update = crypto_blake2s_update,
161 .final = crypto_blake2s_final,
162 .descsize = sizeof(struct blake2s_state),
164 .base.cra_name = "blake2s-224",
165 .base.cra_driver_name = "blake2s-224-x86",
166 .base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
167 .base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx),
168 .base.cra_priority = 200,
169 .base.cra_blocksize = BLAKE2S_BLOCK_SIZE,
170 .base.cra_module = THIS_MODULE,
172 .digestsize = BLAKE2S_224_HASH_SIZE,
173 .setkey = crypto_blake2s_setkey,
174 .init = crypto_blake2s_init,
175 .update = crypto_blake2s_update,
176 .final = crypto_blake2s_final,
177 .descsize = sizeof(struct blake2s_state),
179 .base.cra_name = "blake2s-256",
180 .base.cra_driver_name = "blake2s-256-x86",
181 .base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
182 .base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx),
183 .base.cra_priority = 200,
184 .base.cra_blocksize = BLAKE2S_BLOCK_SIZE,
185 .base.cra_module = THIS_MODULE,
187 .digestsize = BLAKE2S_256_HASH_SIZE,
188 .setkey = crypto_blake2s_setkey,
189 .init = crypto_blake2s_init,
190 .update = crypto_blake2s_update,
191 .final = crypto_blake2s_final,
192 .descsize = sizeof(struct blake2s_state),
195 static int __init blake2s_mod_init(void)
197 if (!boot_cpu_has(X86_FEATURE_SSSE3))
200 static_branch_enable(&blake2s_use_ssse3);
202 if (IS_ENABLED(CONFIG_AS_AVX512) &&
203 boot_cpu_has(X86_FEATURE_AVX) &&
204 boot_cpu_has(X86_FEATURE_AVX2) &&
205 boot_cpu_has(X86_FEATURE_AVX512F) &&
206 boot_cpu_has(X86_FEATURE_AVX512VL) &&
207 cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM |
208 XFEATURE_MASK_AVX512, NULL))
209 static_branch_enable(&blake2s_use_avx512);
211 return IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
212 crypto_register_shashes(blake2s_algs,
213 ARRAY_SIZE(blake2s_algs)) : 0;
216 static void __exit blake2s_mod_exit(void)
218 if (IS_REACHABLE(CONFIG_CRYPTO_HASH) && boot_cpu_has(X86_FEATURE_SSSE3))
219 crypto_unregister_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
222 module_init(blake2s_mod_init);
223 module_exit(blake2s_mod_exit);
225 MODULE_ALIAS_CRYPTO("blake2s-128");
226 MODULE_ALIAS_CRYPTO("blake2s-128-x86");
227 MODULE_ALIAS_CRYPTO("blake2s-160");
228 MODULE_ALIAS_CRYPTO("blake2s-160-x86");
229 MODULE_ALIAS_CRYPTO("blake2s-224");
230 MODULE_ALIAS_CRYPTO("blake2s-224-x86");
231 MODULE_ALIAS_CRYPTO("blake2s-256");
232 MODULE_ALIAS_CRYPTO("blake2s-256-x86");
233 MODULE_LICENSE("GPL v2");