Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/crypto/sha512.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 11091 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | /* SHA-512 code by Jean-Luc Cooke <jlcooke@certainkey.com> |
2 | * |
3 | * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> |
4 | * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> |
5 | * Copyright (c) 2003 Kyle McMartin <kyle@debian.org> |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it |
8 | * under the terms of the GNU General Public License as published by the |
9 | * Free Software Foundation; either version 2, or (at your option) any |
10 | * later version. |
11 | * |
12 | */ |
13 | |
14 | #include <linux/kernel.h> |
15 | #include <linux/module.h> |
16 | |
17 | #include <linux/mm.h> |
18 | #include <linux/init.h> |
19 | #include <linux/crypto.h> |
20 | |
21 | #include <asm/scatterlist.h> |
22 | #include <asm/byteorder.h> |
23 | |
24 | #define SHA384_DIGEST_SIZE 48 |
25 | #define SHA512_DIGEST_SIZE 64 |
26 | #define SHA384_HMAC_BLOCK_SIZE 96 |
27 | #define SHA512_HMAC_BLOCK_SIZE 128 |
28 | |
29 | struct sha512_ctx { |
30 | u64 state[8]; |
31 | u32 count[4]; |
32 | u8 buf[128]; |
33 | u64 W[80]; |
34 | }; |
35 | |
36 | static inline u64 Ch(u64 x, u64 y, u64 z) |
37 | { |
38 | return z ^ (x & (y ^ z)); |
39 | } |
40 | |
41 | static inline u64 Maj(u64 x, u64 y, u64 z) |
42 | { |
43 | return (x & y) | (z & (x | y)); |
44 | } |
45 | |
46 | static inline u64 RORu64(u64 x, u64 y) |
47 | { |
48 | return (x >> y) | (x << (64 - y)); |
49 | } |
50 | |
51 | static const u64 sha512_K[80] = { |
52 | 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, |
53 | 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, |
54 | 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, |
55 | 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, |
56 | 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, |
57 | 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, |
58 | 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, |
59 | 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, |
60 | 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, |
61 | 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, |
62 | 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, |
63 | 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, |
64 | 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, |
65 | 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, |
66 | 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, |
67 | 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, |
68 | 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, |
69 | 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, |
70 | 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, |
71 | 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, |
72 | 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, |
73 | 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, |
74 | 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, |
75 | 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, |
76 | 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, |
77 | 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, |
78 | 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL, |
79 | }; |
80 | |
81 | #define e0(x) (RORu64(x,28) ^ RORu64(x,34) ^ RORu64(x,39)) |
82 | #define e1(x) (RORu64(x,14) ^ RORu64(x,18) ^ RORu64(x,41)) |
83 | #define s0(x) (RORu64(x, 1) ^ RORu64(x, 8) ^ (x >> 7)) |
84 | #define s1(x) (RORu64(x,19) ^ RORu64(x,61) ^ (x >> 6)) |
85 | |
86 | /* H* initial state for SHA-512 */ |
87 | #define H0 0x6a09e667f3bcc908ULL |
88 | #define H1 0xbb67ae8584caa73bULL |
89 | #define H2 0x3c6ef372fe94f82bULL |
90 | #define H3 0xa54ff53a5f1d36f1ULL |
91 | #define H4 0x510e527fade682d1ULL |
92 | #define H5 0x9b05688c2b3e6c1fULL |
93 | #define H6 0x1f83d9abfb41bd6bULL |
94 | #define H7 0x5be0cd19137e2179ULL |
95 | |
96 | /* H'* initial state for SHA-384 */ |
97 | #define HP0 0xcbbb9d5dc1059ed8ULL |
98 | #define HP1 0x629a292a367cd507ULL |
99 | #define HP2 0x9159015a3070dd17ULL |
100 | #define HP3 0x152fecd8f70e5939ULL |
101 | #define HP4 0x67332667ffc00b31ULL |
102 | #define HP5 0x8eb44a8768581511ULL |
103 | #define HP6 0xdb0c2e0d64f98fa7ULL |
104 | #define HP7 0x47b5481dbefa4fa4ULL |
105 | |
106 | static inline void LOAD_OP(int I, u64 *W, const u8 *input) |
107 | { |
108 | W[I] = __be64_to_cpu( ((__be64*)(input))[I] ); |
109 | } |
110 | |
111 | static inline void BLEND_OP(int I, u64 *W) |
112 | { |
113 | W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; |
114 | } |
115 | |
116 | static void |
117 | sha512_transform(u64 *state, u64 *W, const u8 *input) |
118 | { |
119 | u64 a, b, c, d, e, f, g, h, t1, t2; |
120 | |
121 | int i; |
122 | |
123 | /* load the input */ |
124 | for (i = 0; i < 16; i++) |
125 | LOAD_OP(i, W, input); |
126 | |
127 | for (i = 16; i < 80; i++) { |
128 | BLEND_OP(i, W); |
129 | } |
130 | |
131 | /* load the state into our registers */ |
132 | a=state[0]; b=state[1]; c=state[2]; d=state[3]; |
133 | e=state[4]; f=state[5]; g=state[6]; h=state[7]; |
134 | |
135 | /* now iterate */ |
136 | for (i=0; i<80; i+=8) { |
137 | t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[i ]; |
138 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
139 | t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[i+1]; |
140 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
141 | t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[i+2]; |
142 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
143 | t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[i+3]; |
144 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
145 | t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[i+4]; |
146 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
147 | t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[i+5]; |
148 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
149 | t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[i+6]; |
150 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
151 | t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[i+7]; |
152 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
153 | } |
154 | |
155 | state[0] += a; state[1] += b; state[2] += c; state[3] += d; |
156 | state[4] += e; state[5] += f; state[6] += g; state[7] += h; |
157 | |
158 | /* erase our data */ |
159 | a = b = c = d = e = f = g = h = t1 = t2 = 0; |
160 | } |
161 | |
162 | static void |
163 | sha512_init(void *ctx) |
164 | { |
165 | struct sha512_ctx *sctx = ctx; |
166 | sctx->state[0] = H0; |
167 | sctx->state[1] = H1; |
168 | sctx->state[2] = H2; |
169 | sctx->state[3] = H3; |
170 | sctx->state[4] = H4; |
171 | sctx->state[5] = H5; |
172 | sctx->state[6] = H6; |
173 | sctx->state[7] = H7; |
174 | sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; |
175 | memset(sctx->buf, 0, sizeof(sctx->buf)); |
176 | } |
177 | |
178 | static void |
179 | sha384_init(void *ctx) |
180 | { |
181 | struct sha512_ctx *sctx = ctx; |
182 | sctx->state[0] = HP0; |
183 | sctx->state[1] = HP1; |
184 | sctx->state[2] = HP2; |
185 | sctx->state[3] = HP3; |
186 | sctx->state[4] = HP4; |
187 | sctx->state[5] = HP5; |
188 | sctx->state[6] = HP6; |
189 | sctx->state[7] = HP7; |
190 | sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; |
191 | memset(sctx->buf, 0, sizeof(sctx->buf)); |
192 | } |
193 | |
194 | static void |
195 | sha512_update(void *ctx, const u8 *data, unsigned int len) |
196 | { |
197 | struct sha512_ctx *sctx = ctx; |
198 | |
199 | unsigned int i, index, part_len; |
200 | |
201 | /* Compute number of bytes mod 128 */ |
202 | index = (unsigned int)((sctx->count[0] >> 3) & 0x7F); |
203 | |
204 | /* Update number of bits */ |
205 | if ((sctx->count[0] += (len << 3)) < (len << 3)) { |
206 | if ((sctx->count[1] += 1) < 1) |
207 | if ((sctx->count[2] += 1) < 1) |
208 | sctx->count[3]++; |
209 | sctx->count[1] += (len >> 29); |
210 | } |
211 | |
212 | part_len = 128 - index; |
213 | |
214 | /* Transform as many times as possible. */ |
215 | if (len >= part_len) { |
216 | memcpy(&sctx->buf[index], data, part_len); |
217 | sha512_transform(sctx->state, sctx->W, sctx->buf); |
218 | |
219 | for (i = part_len; i + 127 < len; i+=128) |
220 | sha512_transform(sctx->state, sctx->W, &data[i]); |
221 | |
222 | index = 0; |
223 | } else { |
224 | i = 0; |
225 | } |
226 | |
227 | /* Buffer remaining input */ |
228 | memcpy(&sctx->buf[index], &data[i], len - i); |
229 | |
230 | /* erase our data */ |
231 | memset(sctx->W, 0, sizeof(sctx->W)); |
232 | } |
233 | |
234 | static void |
235 | sha512_final(void *ctx, u8 *hash) |
236 | { |
237 | struct sha512_ctx *sctx = ctx; |
238 | |
239 | static u8 padding[128] = { 0x80, }; |
240 | |
241 | u32 t; |
242 | u64 t2; |
243 | u8 bits[128]; |
244 | unsigned int index, pad_len; |
245 | int i, j; |
246 | |
247 | index = pad_len = t = i = j = 0; |
248 | t2 = 0; |
249 | |
250 | /* Save number of bits */ |
251 | t = sctx->count[0]; |
252 | bits[15] = t; t>>=8; |
253 | bits[14] = t; t>>=8; |
254 | bits[13] = t; t>>=8; |
255 | bits[12] = t; |
256 | t = sctx->count[1]; |
257 | bits[11] = t; t>>=8; |
258 | bits[10] = t; t>>=8; |
259 | bits[9 ] = t; t>>=8; |
260 | bits[8 ] = t; |
261 | t = sctx->count[2]; |
262 | bits[7 ] = t; t>>=8; |
263 | bits[6 ] = t; t>>=8; |
264 | bits[5 ] = t; t>>=8; |
265 | bits[4 ] = t; |
266 | t = sctx->count[3]; |
267 | bits[3 ] = t; t>>=8; |
268 | bits[2 ] = t; t>>=8; |
269 | bits[1 ] = t; t>>=8; |
270 | bits[0 ] = t; |
271 | |
272 | /* Pad out to 112 mod 128. */ |
273 | index = (sctx->count[0] >> 3) & 0x7f; |
274 | pad_len = (index < 112) ? (112 - index) : ((128+112) - index); |
275 | sha512_update(sctx, padding, pad_len); |
276 | |
277 | /* Append length (before padding) */ |
278 | sha512_update(sctx, bits, 16); |
279 | |
280 | /* Store state in digest */ |
281 | for (i = j = 0; i < 8; i++, j += 8) { |
282 | t2 = sctx->state[i]; |
283 | hash[j+7] = (char)t2 & 0xff; t2>>=8; |
284 | hash[j+6] = (char)t2 & 0xff; t2>>=8; |
285 | hash[j+5] = (char)t2 & 0xff; t2>>=8; |
286 | hash[j+4] = (char)t2 & 0xff; t2>>=8; |
287 | hash[j+3] = (char)t2 & 0xff; t2>>=8; |
288 | hash[j+2] = (char)t2 & 0xff; t2>>=8; |
289 | hash[j+1] = (char)t2 & 0xff; t2>>=8; |
290 | hash[j ] = (char)t2 & 0xff; |
291 | } |
292 | |
293 | /* Zeroize sensitive information. */ |
294 | memset(sctx, 0, sizeof(struct sha512_ctx)); |
295 | } |
296 | |
297 | static void sha384_final(void *ctx, u8 *hash) |
298 | { |
299 | struct sha512_ctx *sctx = ctx; |
300 | u8 D[64]; |
301 | |
302 | sha512_final(sctx, D); |
303 | |
304 | memcpy(hash, D, 48); |
305 | memset(D, 0, 64); |
306 | } |
307 | |
308 | static struct crypto_alg sha512 = { |
309 | .cra_name = "sha512", |
310 | .cra_flags = CRYPTO_ALG_TYPE_DIGEST, |
311 | .cra_blocksize = SHA512_HMAC_BLOCK_SIZE, |
312 | .cra_ctxsize = sizeof(struct sha512_ctx), |
313 | .cra_module = THIS_MODULE, |
314 | .cra_list = LIST_HEAD_INIT(sha512.cra_list), |
315 | .cra_u = { .digest = { |
316 | .dia_digestsize = SHA512_DIGEST_SIZE, |
317 | .dia_init = sha512_init, |
318 | .dia_update = sha512_update, |
319 | .dia_final = sha512_final } |
320 | } |
321 | }; |
322 | |
323 | static struct crypto_alg sha384 = { |
324 | .cra_name = "sha384", |
325 | .cra_flags = CRYPTO_ALG_TYPE_DIGEST, |
326 | .cra_blocksize = SHA384_HMAC_BLOCK_SIZE, |
327 | .cra_ctxsize = sizeof(struct sha512_ctx), |
328 | .cra_module = THIS_MODULE, |
329 | .cra_list = LIST_HEAD_INIT(sha384.cra_list), |
330 | .cra_u = { .digest = { |
331 | .dia_digestsize = SHA384_DIGEST_SIZE, |
332 | .dia_init = sha384_init, |
333 | .dia_update = sha512_update, |
334 | .dia_final = sha384_final } |
335 | } |
336 | }; |
337 | |
338 | MODULE_ALIAS("sha384"); |
339 | |
340 | static int __init init(void) |
341 | { |
342 | int ret = 0; |
343 | |
344 | if ((ret = crypto_register_alg(&sha384)) < 0) |
345 | goto out; |
346 | if ((ret = crypto_register_alg(&sha512)) < 0) |
347 | crypto_unregister_alg(&sha384); |
348 | out: |
349 | return ret; |
350 | } |
351 | |
352 | static void __exit fini(void) |
353 | { |
354 | crypto_unregister_alg(&sha384); |
355 | crypto_unregister_alg(&sha512); |
356 | } |
357 | |
358 | module_init(init); |
359 | module_exit(fini); |
360 | |
361 | MODULE_LICENSE("GPL"); |
362 | MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms"); |