4 * SHA-256, as specified in
5 * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
7 * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
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>
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)
20 #include <crypto/internal/hash.h>
21 #include <linux/init.h>
22 #include <linux/module.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>
30 static inline u32 Ch(u32 x, u32 y, u32 z)
32 return z ^ (x & (y ^ z));
35 static inline u32 Maj(u32 x, u32 y, u32 z)
37 return (x & y) | (z & (x | y));
40 #define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22))
41 #define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25))
42 #define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))
43 #define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))
45 static inline void LOAD_OP(int I, u32 *W, const u8 *input)
47 W[I] = get_unaligned_be32((__u32 *)input + I);
50 static inline void BLEND_OP(int I, u32 *W)
52 W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
55 static void sha256_transform(u32 *state, const u8 *input)
57 u32 a, b, c, d, e, f, g, h, t1, t2;
62 for (i = 0; i < 16; i++)
66 for (i = 16; i < 64; i++)
69 /* load the state into our registers */
70 a=state[0]; b=state[1]; c=state[2]; d=state[3];
71 e=state[4]; f=state[5]; g=state[6]; h=state[7];
74 t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0];
75 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
76 t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1];
77 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
78 t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2];
79 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
80 t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3];
81 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
82 t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4];
83 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
84 t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5];
85 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
86 t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6];
87 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
88 t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7];
89 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
91 t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8];
92 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
93 t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9];
94 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
95 t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10];
96 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
97 t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11];
98 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
99 t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12];
100 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
101 t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13];
102 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
103 t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14];
104 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
105 t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15];
106 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
108 t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16];
109 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
110 t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17];
111 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
112 t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18];
113 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
114 t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19];
115 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
116 t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20];
117 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
118 t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21];
119 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
120 t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22];
121 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
122 t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23];
123 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
125 t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24];
126 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
127 t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25];
128 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
129 t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26];
130 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
131 t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27];
132 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
133 t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28];
134 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
135 t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29];
136 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
137 t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30];
138 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
139 t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31];
140 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
142 t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32];
143 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
144 t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33];
145 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
146 t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34];
147 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
148 t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35];
149 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
150 t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36];
151 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
152 t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37];
153 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
154 t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38];
155 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
156 t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39];
157 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
159 t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40];
160 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
161 t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41];
162 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
163 t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42];
164 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
165 t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43];
166 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
167 t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44];
168 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
169 t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45];
170 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
171 t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46];
172 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
173 t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47];
174 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
176 t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48];
177 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
178 t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49];
179 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
180 t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50];
181 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
182 t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51];
183 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
184 t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52];
185 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
186 t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53];
187 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
188 t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54];
189 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
190 t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55];
191 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
193 t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56];
194 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
195 t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57];
196 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
197 t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58];
198 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
199 t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59];
200 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
201 t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60];
202 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
203 t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61];
204 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
205 t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62];
206 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
207 t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63];
208 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
210 state[0] += a; state[1] += b; state[2] += c; state[3] += d;
211 state[4] += e; state[5] += f; state[6] += g; state[7] += h;
213 /* clear any sensitive info... */
214 a = b = c = d = e = f = g = h = t1 = t2 = 0;
215 memzero_explicit(W, 64 * sizeof(u32));
218 static void sha256_generic_block_fn(struct sha256_state *sst, u8 const *src,
222 sha256_transform(sst->state, src);
223 src += SHA256_BLOCK_SIZE;
227 int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
230 return sha256_base_do_update(desc, data, len, sha256_generic_block_fn);
232 EXPORT_SYMBOL(crypto_sha256_update);
234 static int sha256_final(struct shash_desc *desc, u8 *out)
236 sha256_base_do_finalize(desc, sha256_generic_block_fn);
237 return sha256_base_finish(desc, out);
240 int crypto_sha256_finup(struct shash_desc *desc, const u8 *data,
241 unsigned int len, u8 *hash)
243 sha256_base_do_update(desc, data, len, sha256_generic_block_fn);
244 return sha256_final(desc, hash);
246 EXPORT_SYMBOL(crypto_sha256_finup);
248 static struct shash_alg sha256_algs[2] = { {
249 .digestsize = SHA256_DIGEST_SIZE,
250 .init = sha256_base_init,
251 .update = crypto_sha256_update,
252 .final = sha256_final,
253 .finup = crypto_sha256_finup,
254 .descsize = sizeof(struct sha256_state),
256 .cra_name = "sha256",
257 .cra_driver_name= "sha256-generic",
258 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
259 .cra_blocksize = SHA256_BLOCK_SIZE,
260 .cra_module = THIS_MODULE,
263 .digestsize = SHA224_DIGEST_SIZE,
264 .init = sha224_base_init,
265 .update = crypto_sha256_update,
266 .final = sha256_final,
267 .finup = crypto_sha256_finup,
268 .descsize = sizeof(struct sha256_state),
270 .cra_name = "sha224",
271 .cra_driver_name= "sha224-generic",
272 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
273 .cra_blocksize = SHA224_BLOCK_SIZE,
274 .cra_module = THIS_MODULE,
278 static int __init sha256_generic_mod_init(void)
280 return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
283 static void __exit sha256_generic_mod_fini(void)
285 crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
288 module_init(sha256_generic_mod_init);
289 module_exit(sha256_generic_mod_fini);
291 MODULE_LICENSE("GPL");
292 MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");
294 MODULE_ALIAS_CRYPTO("sha224");
295 MODULE_ALIAS_CRYPTO("sha224-generic");
296 MODULE_ALIAS_CRYPTO("sha256");
297 MODULE_ALIAS_CRYPTO("sha256-generic");