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c8611d71 JK |
1 | /* |
2 | * Glue code for the SHA512 Secure Hash Algorithm assembly implementation | |
3 | * using NEON instructions. | |
4 | * | |
5 | * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi> | |
6 | * | |
7 | * This file is based on sha512_ssse3_glue.c: | |
8 | * Copyright (C) 2013 Intel Corporation | |
9 | * Author: Tim Chen <tim.c.chen@linux.intel.com> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the Free | |
13 | * Software Foundation; either version 2 of the License, or (at your option) | |
14 | * any later version. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <crypto/internal/hash.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/cryptohash.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/string.h> | |
25 | #include <crypto/sha.h> | |
26 | #include <asm/byteorder.h> | |
27 | #include <asm/simd.h> | |
28 | #include <asm/neon.h> | |
29 | ||
30 | ||
31 | static const u64 sha512_k[] = { | |
32 | 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, | |
33 | 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL, | |
34 | 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, | |
35 | 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, | |
36 | 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, | |
37 | 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, | |
38 | 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, | |
39 | 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL, | |
40 | 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, | |
41 | 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, | |
42 | 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, | |
43 | 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, | |
44 | 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, | |
45 | 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL, | |
46 | 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, | |
47 | 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, | |
48 | 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, | |
49 | 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, | |
50 | 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, | |
51 | 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL, | |
52 | 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, | |
53 | 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, | |
54 | 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, | |
55 | 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, | |
56 | 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, | |
57 | 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL, | |
58 | 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, | |
59 | 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, | |
60 | 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, | |
61 | 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, | |
62 | 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, | |
63 | 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL, | |
64 | 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, | |
65 | 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, | |
66 | 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, | |
67 | 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, | |
68 | 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, | |
69 | 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL, | |
70 | 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, | |
71 | 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL | |
72 | }; | |
73 | ||
74 | ||
75 | asmlinkage void sha512_transform_neon(u64 *digest, const void *data, | |
76 | const u64 k[], unsigned int num_blks); | |
77 | ||
78 | ||
79 | static int sha512_neon_init(struct shash_desc *desc) | |
80 | { | |
81 | struct sha512_state *sctx = shash_desc_ctx(desc); | |
82 | ||
83 | sctx->state[0] = SHA512_H0; | |
84 | sctx->state[1] = SHA512_H1; | |
85 | sctx->state[2] = SHA512_H2; | |
86 | sctx->state[3] = SHA512_H3; | |
87 | sctx->state[4] = SHA512_H4; | |
88 | sctx->state[5] = SHA512_H5; | |
89 | sctx->state[6] = SHA512_H6; | |
90 | sctx->state[7] = SHA512_H7; | |
91 | sctx->count[0] = sctx->count[1] = 0; | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | static int __sha512_neon_update(struct shash_desc *desc, const u8 *data, | |
97 | unsigned int len, unsigned int partial) | |
98 | { | |
99 | struct sha512_state *sctx = shash_desc_ctx(desc); | |
100 | unsigned int done = 0; | |
101 | ||
102 | sctx->count[0] += len; | |
103 | if (sctx->count[0] < len) | |
104 | sctx->count[1]++; | |
105 | ||
106 | if (partial) { | |
107 | done = SHA512_BLOCK_SIZE - partial; | |
108 | memcpy(sctx->buf + partial, data, done); | |
109 | sha512_transform_neon(sctx->state, sctx->buf, sha512_k, 1); | |
110 | } | |
111 | ||
112 | if (len - done >= SHA512_BLOCK_SIZE) { | |
113 | const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE; | |
114 | ||
115 | sha512_transform_neon(sctx->state, data + done, sha512_k, | |
116 | rounds); | |
117 | ||
118 | done += rounds * SHA512_BLOCK_SIZE; | |
119 | } | |
120 | ||
121 | memcpy(sctx->buf, data + done, len - done); | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | static int sha512_neon_update(struct shash_desc *desc, const u8 *data, | |
127 | unsigned int len) | |
128 | { | |
129 | struct sha512_state *sctx = shash_desc_ctx(desc); | |
130 | unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE; | |
131 | int res; | |
132 | ||
133 | /* Handle the fast case right here */ | |
134 | if (partial + len < SHA512_BLOCK_SIZE) { | |
135 | sctx->count[0] += len; | |
136 | if (sctx->count[0] < len) | |
137 | sctx->count[1]++; | |
138 | memcpy(sctx->buf + partial, data, len); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | if (!may_use_simd()) { | |
144 | res = crypto_sha512_update(desc, data, len); | |
145 | } else { | |
146 | kernel_neon_begin(); | |
147 | res = __sha512_neon_update(desc, data, len, partial); | |
148 | kernel_neon_end(); | |
149 | } | |
150 | ||
151 | return res; | |
152 | } | |
153 | ||
154 | ||
155 | /* Add padding and return the message digest. */ | |
156 | static int sha512_neon_final(struct shash_desc *desc, u8 *out) | |
157 | { | |
158 | struct sha512_state *sctx = shash_desc_ctx(desc); | |
159 | unsigned int i, index, padlen; | |
160 | __be64 *dst = (__be64 *)out; | |
161 | __be64 bits[2]; | |
162 | static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, }; | |
163 | ||
164 | /* save number of bits */ | |
165 | bits[1] = cpu_to_be64(sctx->count[0] << 3); | |
166 | bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61); | |
167 | ||
168 | /* Pad out to 112 mod 128 and append length */ | |
169 | index = sctx->count[0] & 0x7f; | |
170 | padlen = (index < 112) ? (112 - index) : ((128+112) - index); | |
171 | ||
172 | if (!may_use_simd()) { | |
173 | crypto_sha512_update(desc, padding, padlen); | |
174 | crypto_sha512_update(desc, (const u8 *)&bits, sizeof(bits)); | |
175 | } else { | |
176 | kernel_neon_begin(); | |
177 | /* We need to fill a whole block for __sha512_neon_update() */ | |
178 | if (padlen <= 112) { | |
179 | sctx->count[0] += padlen; | |
180 | if (sctx->count[0] < padlen) | |
181 | sctx->count[1]++; | |
182 | memcpy(sctx->buf + index, padding, padlen); | |
183 | } else { | |
184 | __sha512_neon_update(desc, padding, padlen, index); | |
185 | } | |
186 | __sha512_neon_update(desc, (const u8 *)&bits, | |
187 | sizeof(bits), 112); | |
188 | kernel_neon_end(); | |
189 | } | |
190 | ||
191 | /* Store state in digest */ | |
192 | for (i = 0; i < 8; i++) | |
193 | dst[i] = cpu_to_be64(sctx->state[i]); | |
194 | ||
195 | /* Wipe context */ | |
196 | memset(sctx, 0, sizeof(*sctx)); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | static int sha512_neon_export(struct shash_desc *desc, void *out) | |
202 | { | |
203 | struct sha512_state *sctx = shash_desc_ctx(desc); | |
204 | ||
205 | memcpy(out, sctx, sizeof(*sctx)); | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | static int sha512_neon_import(struct shash_desc *desc, const void *in) | |
211 | { | |
212 | struct sha512_state *sctx = shash_desc_ctx(desc); | |
213 | ||
214 | memcpy(sctx, in, sizeof(*sctx)); | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | static int sha384_neon_init(struct shash_desc *desc) | |
220 | { | |
221 | struct sha512_state *sctx = shash_desc_ctx(desc); | |
222 | ||
223 | sctx->state[0] = SHA384_H0; | |
224 | sctx->state[1] = SHA384_H1; | |
225 | sctx->state[2] = SHA384_H2; | |
226 | sctx->state[3] = SHA384_H3; | |
227 | sctx->state[4] = SHA384_H4; | |
228 | sctx->state[5] = SHA384_H5; | |
229 | sctx->state[6] = SHA384_H6; | |
230 | sctx->state[7] = SHA384_H7; | |
231 | ||
232 | sctx->count[0] = sctx->count[1] = 0; | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int sha384_neon_final(struct shash_desc *desc, u8 *hash) | |
238 | { | |
239 | u8 D[SHA512_DIGEST_SIZE]; | |
240 | ||
241 | sha512_neon_final(desc, D); | |
242 | ||
243 | memcpy(hash, D, SHA384_DIGEST_SIZE); | |
244 | memset(D, 0, SHA512_DIGEST_SIZE); | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | static struct shash_alg algs[] = { { | |
250 | .digestsize = SHA512_DIGEST_SIZE, | |
251 | .init = sha512_neon_init, | |
252 | .update = sha512_neon_update, | |
253 | .final = sha512_neon_final, | |
254 | .export = sha512_neon_export, | |
255 | .import = sha512_neon_import, | |
256 | .descsize = sizeof(struct sha512_state), | |
257 | .statesize = sizeof(struct sha512_state), | |
258 | .base = { | |
259 | .cra_name = "sha512", | |
260 | .cra_driver_name = "sha512-neon", | |
261 | .cra_priority = 250, | |
262 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
263 | .cra_blocksize = SHA512_BLOCK_SIZE, | |
264 | .cra_module = THIS_MODULE, | |
265 | } | |
266 | }, { | |
267 | .digestsize = SHA384_DIGEST_SIZE, | |
268 | .init = sha384_neon_init, | |
269 | .update = sha512_neon_update, | |
270 | .final = sha384_neon_final, | |
271 | .export = sha512_neon_export, | |
272 | .import = sha512_neon_import, | |
273 | .descsize = sizeof(struct sha512_state), | |
274 | .statesize = sizeof(struct sha512_state), | |
275 | .base = { | |
276 | .cra_name = "sha384", | |
277 | .cra_driver_name = "sha384-neon", | |
278 | .cra_priority = 250, | |
279 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
280 | .cra_blocksize = SHA384_BLOCK_SIZE, | |
281 | .cra_module = THIS_MODULE, | |
282 | } | |
283 | } }; | |
284 | ||
285 | static int __init sha512_neon_mod_init(void) | |
286 | { | |
287 | if (!cpu_has_neon()) | |
288 | return -ENODEV; | |
289 | ||
290 | return crypto_register_shashes(algs, ARRAY_SIZE(algs)); | |
291 | } | |
292 | ||
293 | static void __exit sha512_neon_mod_fini(void) | |
294 | { | |
295 | crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); | |
296 | } | |
297 | ||
298 | module_init(sha512_neon_mod_init); | |
299 | module_exit(sha512_neon_mod_fini); | |
300 | ||
301 | MODULE_LICENSE("GPL"); | |
302 | MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm, NEON accelerated"); | |
303 | ||
304 | MODULE_ALIAS("sha512"); | |
305 | MODULE_ALIAS("sha384"); |