blob: 8f9c47e1a96e4792a52454a79312ab6696ede007
1 | /* |
2 | * Cryptographic API. |
3 | * |
4 | * SHA-256, as specified in |
5 | * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf |
6 | * |
7 | * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>. |
8 | * |
9 | * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> |
10 | * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> |
11 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> |
12 | * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com> |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify it |
15 | * under the terms of the GNU General Public License as published by the Free |
16 | * Software Foundation; either version 2 of the License, or (at your option) |
17 | * any later version. |
18 | * |
19 | */ |
20 | #include <crypto/internal/hash.h> |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> |
23 | #include <linux/mm.h> |
24 | #include <linux/types.h> |
25 | #include <crypto/sha.h> |
26 | #include <crypto/sha256_base.h> |
27 | #include <asm/byteorder.h> |
28 | #include <asm/unaligned.h> |
29 | |
30 | const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE] = { |
31 | 0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47, |
32 | 0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2, |
33 | 0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4, |
34 | 0x2f |
35 | }; |
36 | EXPORT_SYMBOL_GPL(sha224_zero_message_hash); |
37 | |
38 | const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE] = { |
39 | 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, |
40 | 0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24, |
41 | 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c, |
42 | 0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55 |
43 | }; |
44 | EXPORT_SYMBOL_GPL(sha256_zero_message_hash); |
45 | |
46 | static inline u32 Ch(u32 x, u32 y, u32 z) |
47 | { |
48 | return z ^ (x & (y ^ z)); |
49 | } |
50 | |
51 | static inline u32 Maj(u32 x, u32 y, u32 z) |
52 | { |
53 | return (x & y) | (z & (x | y)); |
54 | } |
55 | |
56 | #define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22)) |
57 | #define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25)) |
58 | #define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3)) |
59 | #define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10)) |
60 | |
61 | static inline void LOAD_OP(int I, u32 *W, const u8 *input) |
62 | { |
63 | W[I] = get_unaligned_be32((__u32 *)input + I); |
64 | } |
65 | |
66 | static inline void BLEND_OP(int I, u32 *W) |
67 | { |
68 | W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; |
69 | } |
70 | |
71 | static void sha256_transform(u32 *state, const u8 *input) |
72 | { |
73 | u32 a, b, c, d, e, f, g, h, t1, t2; |
74 | u32 W[64]; |
75 | int i; |
76 | |
77 | /* load the input */ |
78 | for (i = 0; i < 16; i++) |
79 | LOAD_OP(i, W, input); |
80 | |
81 | /* now blend */ |
82 | for (i = 16; i < 64; i++) |
83 | BLEND_OP(i, W); |
84 | |
85 | /* load the state into our registers */ |
86 | a=state[0]; b=state[1]; c=state[2]; d=state[3]; |
87 | e=state[4]; f=state[5]; g=state[6]; h=state[7]; |
88 | |
89 | /* now iterate */ |
90 | t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0]; |
91 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
92 | t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1]; |
93 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
94 | t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2]; |
95 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
96 | t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3]; |
97 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
98 | t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4]; |
99 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
100 | t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5]; |
101 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
102 | t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6]; |
103 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
104 | t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7]; |
105 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
106 | |
107 | t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8]; |
108 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
109 | t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9]; |
110 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
111 | t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10]; |
112 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
113 | t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11]; |
114 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
115 | t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12]; |
116 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
117 | t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13]; |
118 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
119 | t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14]; |
120 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
121 | t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15]; |
122 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
123 | |
124 | t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16]; |
125 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
126 | t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17]; |
127 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
128 | t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18]; |
129 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
130 | t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19]; |
131 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
132 | t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20]; |
133 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
134 | t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21]; |
135 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
136 | t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22]; |
137 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
138 | t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23]; |
139 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
140 | |
141 | t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24]; |
142 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
143 | t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25]; |
144 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
145 | t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26]; |
146 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
147 | t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27]; |
148 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
149 | t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28]; |
150 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
151 | t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29]; |
152 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
153 | t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30]; |
154 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
155 | t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31]; |
156 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
157 | |
158 | t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32]; |
159 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
160 | t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33]; |
161 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
162 | t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34]; |
163 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
164 | t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35]; |
165 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
166 | t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36]; |
167 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
168 | t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37]; |
169 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
170 | t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38]; |
171 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
172 | t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39]; |
173 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
174 | |
175 | t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40]; |
176 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
177 | t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41]; |
178 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
179 | t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42]; |
180 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
181 | t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43]; |
182 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
183 | t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44]; |
184 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
185 | t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45]; |
186 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
187 | t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46]; |
188 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
189 | t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47]; |
190 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
191 | |
192 | t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48]; |
193 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
194 | t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49]; |
195 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
196 | t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50]; |
197 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
198 | t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51]; |
199 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
200 | t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52]; |
201 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
202 | t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53]; |
203 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
204 | t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54]; |
205 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
206 | t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55]; |
207 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
208 | |
209 | t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56]; |
210 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
211 | t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57]; |
212 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
213 | t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58]; |
214 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
215 | t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59]; |
216 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
217 | t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60]; |
218 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
219 | t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61]; |
220 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
221 | t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62]; |
222 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
223 | t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63]; |
224 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
225 | |
226 | state[0] += a; state[1] += b; state[2] += c; state[3] += d; |
227 | state[4] += e; state[5] += f; state[6] += g; state[7] += h; |
228 | |
229 | /* clear any sensitive info... */ |
230 | a = b = c = d = e = f = g = h = t1 = t2 = 0; |
231 | memzero_explicit(W, 64 * sizeof(u32)); |
232 | } |
233 | |
234 | static void sha256_generic_block_fn(struct sha256_state *sst, u8 const *src, |
235 | int blocks) |
236 | { |
237 | while (blocks--) { |
238 | sha256_transform(sst->state, src); |
239 | src += SHA256_BLOCK_SIZE; |
240 | } |
241 | } |
242 | |
243 | int crypto_sha256_update(struct shash_desc *desc, const u8 *data, |
244 | unsigned int len) |
245 | { |
246 | return sha256_base_do_update(desc, data, len, sha256_generic_block_fn); |
247 | } |
248 | EXPORT_SYMBOL(crypto_sha256_update); |
249 | |
250 | static int sha256_final(struct shash_desc *desc, u8 *out) |
251 | { |
252 | sha256_base_do_finalize(desc, sha256_generic_block_fn); |
253 | return sha256_base_finish(desc, out); |
254 | } |
255 | |
256 | int crypto_sha256_finup(struct shash_desc *desc, const u8 *data, |
257 | unsigned int len, u8 *hash) |
258 | { |
259 | sha256_base_do_update(desc, data, len, sha256_generic_block_fn); |
260 | return sha256_final(desc, hash); |
261 | } |
262 | EXPORT_SYMBOL(crypto_sha256_finup); |
263 | |
264 | static struct shash_alg sha256_algs[2] = { { |
265 | .digestsize = SHA256_DIGEST_SIZE, |
266 | .init = sha256_base_init, |
267 | .update = crypto_sha256_update, |
268 | .final = sha256_final, |
269 | .finup = crypto_sha256_finup, |
270 | .descsize = sizeof(struct sha256_state), |
271 | .base = { |
272 | .cra_name = "sha256", |
273 | .cra_driver_name= "sha256-generic", |
274 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
275 | .cra_blocksize = SHA256_BLOCK_SIZE, |
276 | .cra_module = THIS_MODULE, |
277 | } |
278 | }, { |
279 | .digestsize = SHA224_DIGEST_SIZE, |
280 | .init = sha224_base_init, |
281 | .update = crypto_sha256_update, |
282 | .final = sha256_final, |
283 | .finup = crypto_sha256_finup, |
284 | .descsize = sizeof(struct sha256_state), |
285 | .base = { |
286 | .cra_name = "sha224", |
287 | .cra_driver_name= "sha224-generic", |
288 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
289 | .cra_blocksize = SHA224_BLOCK_SIZE, |
290 | .cra_module = THIS_MODULE, |
291 | } |
292 | } }; |
293 | |
294 | static int __init sha256_generic_mod_init(void) |
295 | { |
296 | return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs)); |
297 | } |
298 | |
299 | static void __exit sha256_generic_mod_fini(void) |
300 | { |
301 | crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs)); |
302 | } |
303 | |
304 | module_init(sha256_generic_mod_init); |
305 | module_exit(sha256_generic_mod_fini); |
306 | |
307 | MODULE_LICENSE("GPL"); |
308 | MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm"); |
309 | |
310 | MODULE_ALIAS_CRYPTO("sha224"); |
311 | MODULE_ALIAS_CRYPTO("sha224-generic"); |
312 | MODULE_ALIAS_CRYPTO("sha256"); |
313 | MODULE_ALIAS_CRYPTO("sha256-generic"); |
314 |