Root/
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 <asm/byteorder.h> |
27 | |
28 | static inline u32 Ch(u32 x, u32 y, u32 z) |
29 | { |
30 | return z ^ (x & (y ^ z)); |
31 | } |
32 | |
33 | static inline u32 Maj(u32 x, u32 y, u32 z) |
34 | { |
35 | return (x & y) | (z & (x | y)); |
36 | } |
37 | |
38 | #define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22)) |
39 | #define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25)) |
40 | #define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3)) |
41 | #define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10)) |
42 | |
43 | static inline void LOAD_OP(int I, u32 *W, const u8 *input) |
44 | { |
45 | W[I] = __be32_to_cpu( ((__be32*)(input))[I] ); |
46 | } |
47 | |
48 | static inline void BLEND_OP(int I, u32 *W) |
49 | { |
50 | W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; |
51 | } |
52 | |
53 | static void sha256_transform(u32 *state, const u8 *input) |
54 | { |
55 | u32 a, b, c, d, e, f, g, h, t1, t2; |
56 | u32 W[64]; |
57 | int i; |
58 | |
59 | /* load the input */ |
60 | for (i = 0; i < 16; i++) |
61 | LOAD_OP(i, W, input); |
62 | |
63 | /* now blend */ |
64 | for (i = 16; i < 64; i++) |
65 | BLEND_OP(i, W); |
66 | |
67 | /* load the state into our registers */ |
68 | a=state[0]; b=state[1]; c=state[2]; d=state[3]; |
69 | e=state[4]; f=state[5]; g=state[6]; h=state[7]; |
70 | |
71 | /* now iterate */ |
72 | t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0]; |
73 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
74 | t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1]; |
75 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
76 | t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2]; |
77 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
78 | t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3]; |
79 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
80 | t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4]; |
81 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
82 | t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5]; |
83 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
84 | t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6]; |
85 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
86 | t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7]; |
87 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
88 | |
89 | t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8]; |
90 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
91 | t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9]; |
92 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
93 | t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10]; |
94 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
95 | t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11]; |
96 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
97 | t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12]; |
98 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
99 | t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13]; |
100 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
101 | t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14]; |
102 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
103 | t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15]; |
104 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
105 | |
106 | t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16]; |
107 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
108 | t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17]; |
109 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
110 | t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18]; |
111 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
112 | t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19]; |
113 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
114 | t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20]; |
115 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
116 | t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21]; |
117 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
118 | t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22]; |
119 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
120 | t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23]; |
121 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
122 | |
123 | t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24]; |
124 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
125 | t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25]; |
126 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
127 | t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26]; |
128 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
129 | t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27]; |
130 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
131 | t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28]; |
132 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
133 | t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29]; |
134 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
135 | t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30]; |
136 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
137 | t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31]; |
138 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
139 | |
140 | t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32]; |
141 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
142 | t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33]; |
143 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
144 | t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34]; |
145 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
146 | t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35]; |
147 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
148 | t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36]; |
149 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
150 | t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37]; |
151 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
152 | t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38]; |
153 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
154 | t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39]; |
155 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
156 | |
157 | t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40]; |
158 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
159 | t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41]; |
160 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
161 | t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42]; |
162 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
163 | t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43]; |
164 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
165 | t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44]; |
166 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
167 | t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45]; |
168 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
169 | t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46]; |
170 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
171 | t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47]; |
172 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
173 | |
174 | t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48]; |
175 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
176 | t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49]; |
177 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
178 | t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50]; |
179 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
180 | t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51]; |
181 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
182 | t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52]; |
183 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
184 | t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53]; |
185 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
186 | t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54]; |
187 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
188 | t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55]; |
189 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
190 | |
191 | t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56]; |
192 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
193 | t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57]; |
194 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
195 | t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58]; |
196 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
197 | t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59]; |
198 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
199 | t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60]; |
200 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
201 | t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61]; |
202 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
203 | t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62]; |
204 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
205 | t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63]; |
206 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
207 | |
208 | state[0] += a; state[1] += b; state[2] += c; state[3] += d; |
209 | state[4] += e; state[5] += f; state[6] += g; state[7] += h; |
210 | |
211 | /* clear any sensitive info... */ |
212 | a = b = c = d = e = f = g = h = t1 = t2 = 0; |
213 | memset(W, 0, 64 * sizeof(u32)); |
214 | } |
215 | |
216 | |
217 | static int sha224_init(struct shash_desc *desc) |
218 | { |
219 | struct sha256_state *sctx = shash_desc_ctx(desc); |
220 | sctx->state[0] = SHA224_H0; |
221 | sctx->state[1] = SHA224_H1; |
222 | sctx->state[2] = SHA224_H2; |
223 | sctx->state[3] = SHA224_H3; |
224 | sctx->state[4] = SHA224_H4; |
225 | sctx->state[5] = SHA224_H5; |
226 | sctx->state[6] = SHA224_H6; |
227 | sctx->state[7] = SHA224_H7; |
228 | sctx->count = 0; |
229 | |
230 | return 0; |
231 | } |
232 | |
233 | static int sha256_init(struct shash_desc *desc) |
234 | { |
235 | struct sha256_state *sctx = shash_desc_ctx(desc); |
236 | sctx->state[0] = SHA256_H0; |
237 | sctx->state[1] = SHA256_H1; |
238 | sctx->state[2] = SHA256_H2; |
239 | sctx->state[3] = SHA256_H3; |
240 | sctx->state[4] = SHA256_H4; |
241 | sctx->state[5] = SHA256_H5; |
242 | sctx->state[6] = SHA256_H6; |
243 | sctx->state[7] = SHA256_H7; |
244 | sctx->count = 0; |
245 | |
246 | return 0; |
247 | } |
248 | |
249 | int crypto_sha256_update(struct shash_desc *desc, const u8 *data, |
250 | unsigned int len) |
251 | { |
252 | struct sha256_state *sctx = shash_desc_ctx(desc); |
253 | unsigned int partial, done; |
254 | const u8 *src; |
255 | |
256 | partial = sctx->count & 0x3f; |
257 | sctx->count += len; |
258 | done = 0; |
259 | src = data; |
260 | |
261 | if ((partial + len) > 63) { |
262 | if (partial) { |
263 | done = -partial; |
264 | memcpy(sctx->buf + partial, data, done + 64); |
265 | src = sctx->buf; |
266 | } |
267 | |
268 | do { |
269 | sha256_transform(sctx->state, src); |
270 | done += 64; |
271 | src = data + done; |
272 | } while (done + 63 < len); |
273 | |
274 | partial = 0; |
275 | } |
276 | memcpy(sctx->buf + partial, src, len - done); |
277 | |
278 | return 0; |
279 | } |
280 | EXPORT_SYMBOL(crypto_sha256_update); |
281 | |
282 | static int sha256_final(struct shash_desc *desc, u8 *out) |
283 | { |
284 | struct sha256_state *sctx = shash_desc_ctx(desc); |
285 | __be32 *dst = (__be32 *)out; |
286 | __be64 bits; |
287 | unsigned int index, pad_len; |
288 | int i; |
289 | static const u8 padding[64] = { 0x80, }; |
290 | |
291 | /* Save number of bits */ |
292 | bits = cpu_to_be64(sctx->count << 3); |
293 | |
294 | /* Pad out to 56 mod 64. */ |
295 | index = sctx->count & 0x3f; |
296 | pad_len = (index < 56) ? (56 - index) : ((64+56) - index); |
297 | crypto_sha256_update(desc, padding, pad_len); |
298 | |
299 | /* Append length (before padding) */ |
300 | crypto_sha256_update(desc, (const u8 *)&bits, sizeof(bits)); |
301 | |
302 | /* Store state in digest */ |
303 | for (i = 0; i < 8; i++) |
304 | dst[i] = cpu_to_be32(sctx->state[i]); |
305 | |
306 | /* Zeroize sensitive information. */ |
307 | memset(sctx, 0, sizeof(*sctx)); |
308 | |
309 | return 0; |
310 | } |
311 | |
312 | static int sha224_final(struct shash_desc *desc, u8 *hash) |
313 | { |
314 | u8 D[SHA256_DIGEST_SIZE]; |
315 | |
316 | sha256_final(desc, D); |
317 | |
318 | memcpy(hash, D, SHA224_DIGEST_SIZE); |
319 | memset(D, 0, SHA256_DIGEST_SIZE); |
320 | |
321 | return 0; |
322 | } |
323 | |
324 | static int sha256_export(struct shash_desc *desc, void *out) |
325 | { |
326 | struct sha256_state *sctx = shash_desc_ctx(desc); |
327 | |
328 | memcpy(out, sctx, sizeof(*sctx)); |
329 | return 0; |
330 | } |
331 | |
332 | static int sha256_import(struct shash_desc *desc, const void *in) |
333 | { |
334 | struct sha256_state *sctx = shash_desc_ctx(desc); |
335 | |
336 | memcpy(sctx, in, sizeof(*sctx)); |
337 | return 0; |
338 | } |
339 | |
340 | static struct shash_alg sha256_algs[2] = { { |
341 | .digestsize = SHA256_DIGEST_SIZE, |
342 | .init = sha256_init, |
343 | .update = crypto_sha256_update, |
344 | .final = sha256_final, |
345 | .export = sha256_export, |
346 | .import = sha256_import, |
347 | .descsize = sizeof(struct sha256_state), |
348 | .statesize = sizeof(struct sha256_state), |
349 | .base = { |
350 | .cra_name = "sha256", |
351 | .cra_driver_name= "sha256-generic", |
352 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
353 | .cra_blocksize = SHA256_BLOCK_SIZE, |
354 | .cra_module = THIS_MODULE, |
355 | } |
356 | }, { |
357 | .digestsize = SHA224_DIGEST_SIZE, |
358 | .init = sha224_init, |
359 | .update = crypto_sha256_update, |
360 | .final = sha224_final, |
361 | .descsize = sizeof(struct sha256_state), |
362 | .base = { |
363 | .cra_name = "sha224", |
364 | .cra_driver_name= "sha224-generic", |
365 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
366 | .cra_blocksize = SHA224_BLOCK_SIZE, |
367 | .cra_module = THIS_MODULE, |
368 | } |
369 | } }; |
370 | |
371 | static int __init sha256_generic_mod_init(void) |
372 | { |
373 | return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs)); |
374 | } |
375 | |
376 | static void __exit sha256_generic_mod_fini(void) |
377 | { |
378 | crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs)); |
379 | } |
380 | |
381 | module_init(sha256_generic_mod_init); |
382 | module_exit(sha256_generic_mod_fini); |
383 | |
384 | MODULE_LICENSE("GPL"); |
385 | MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm"); |
386 | |
387 | MODULE_ALIAS("sha224"); |
388 | MODULE_ALIAS("sha256"); |
389 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9