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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
28static inline u32 Ch(u32 x, u32 y, u32 z)
29{
30 return z ^ (x & (y ^ z));
31}
32
33static 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
43static inline void LOAD_OP(int I, u32 *W, const u8 *input)
44{
45 W[I] = __be32_to_cpu( ((__be32*)(input))[I] );
46}
47
48static 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
53static 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
60 for (i = 0; i < 16; i++)
61 LOAD_OP(i, W, input);
62
63
64 for (i = 16; i < 64; i++)
65 BLEND_OP(i, W);
66
67
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
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
212 a = b = c = d = e = f = g = h = t1 = t2 = 0;
213 memset(W, 0, 64 * sizeof(u32));
214}
215
216
217static 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
233static 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
249static int 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
281static int sha256_final(struct shash_desc *desc, u8 *out)
282{
283 struct sha256_state *sctx = shash_desc_ctx(desc);
284 __be32 *dst = (__be32 *)out;
285 __be64 bits;
286 unsigned int index, pad_len;
287 int i;
288 static const u8 padding[64] = { 0x80, };
289
290
291 bits = cpu_to_be64(sctx->count << 3);
292
293
294 index = sctx->count & 0x3f;
295 pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
296 sha256_update(desc, padding, pad_len);
297
298
299 sha256_update(desc, (const u8 *)&bits, sizeof(bits));
300
301
302 for (i = 0; i < 8; i++)
303 dst[i] = cpu_to_be32(sctx->state[i]);
304
305
306 memset(sctx, 0, sizeof(*sctx));
307
308 return 0;
309}
310
311static int sha224_final(struct shash_desc *desc, u8 *hash)
312{
313 u8 D[SHA256_DIGEST_SIZE];
314
315 sha256_final(desc, D);
316
317 memcpy(hash, D, SHA224_DIGEST_SIZE);
318 memset(D, 0, SHA256_DIGEST_SIZE);
319
320 return 0;
321}
322
323static int sha256_export(struct shash_desc *desc, void *out)
324{
325 struct sha256_state *sctx = shash_desc_ctx(desc);
326
327 memcpy(out, sctx, sizeof(*sctx));
328 return 0;
329}
330
331static int sha256_import(struct shash_desc *desc, const void *in)
332{
333 struct sha256_state *sctx = shash_desc_ctx(desc);
334
335 memcpy(sctx, in, sizeof(*sctx));
336 return 0;
337}
338
339static struct shash_alg sha256 = {
340 .digestsize = SHA256_DIGEST_SIZE,
341 .init = sha256_init,
342 .update = sha256_update,
343 .final = sha256_final,
344 .export = sha256_export,
345 .import = sha256_import,
346 .descsize = sizeof(struct sha256_state),
347 .statesize = sizeof(struct sha256_state),
348 .base = {
349 .cra_name = "sha256",
350 .cra_driver_name= "sha256-generic",
351 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
352 .cra_blocksize = SHA256_BLOCK_SIZE,
353 .cra_module = THIS_MODULE,
354 }
355};
356
357static struct shash_alg sha224 = {
358 .digestsize = SHA224_DIGEST_SIZE,
359 .init = sha224_init,
360 .update = sha256_update,
361 .final = sha224_final,
362 .descsize = sizeof(struct sha256_state),
363 .base = {
364 .cra_name = "sha224",
365 .cra_driver_name= "sha224-generic",
366 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
367 .cra_blocksize = SHA224_BLOCK_SIZE,
368 .cra_module = THIS_MODULE,
369 }
370};
371
372static int __init sha256_generic_mod_init(void)
373{
374 int ret = 0;
375
376 ret = crypto_register_shash(&sha224);
377
378 if (ret < 0)
379 return ret;
380
381 ret = crypto_register_shash(&sha256);
382
383 if (ret < 0)
384 crypto_unregister_shash(&sha224);
385
386 return ret;
387}
388
389static void __exit sha256_generic_mod_fini(void)
390{
391 crypto_unregister_shash(&sha224);
392 crypto_unregister_shash(&sha256);
393}
394
395module_init(sha256_generic_mod_init);
396module_exit(sha256_generic_mod_fini);
397
398MODULE_LICENSE("GPL");
399MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");
400
401MODULE_ALIAS("sha224");
402MODULE_ALIAS("sha256");
403
