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