diff options
author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-07-21 00:55:14 -0400 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2008-07-21 00:55:14 -0400 |
commit | 908cf4b925e419bc74f3297b2f0e51d6f8a81da2 (patch) | |
tree | 6c2da79366d4695a9c2560ab18259eca8a2a25b4 /crypto/rmd256.c | |
parent | 92c49890922d54cba4b1eadeb0b185773c2c9570 (diff) | |
parent | 14b395e35d1afdd8019d11b92e28041fad591b71 (diff) |
Merge master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into next
Diffstat (limited to 'crypto/rmd256.c')
-rw-r--r-- | crypto/rmd256.c | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/crypto/rmd256.c b/crypto/rmd256.c new file mode 100644 index 000000000000..e3de5b4cb47f --- /dev/null +++ b/crypto/rmd256.c | |||
@@ -0,0 +1,344 @@ | |||
1 | /* | ||
2 | * Cryptographic API. | ||
3 | * | ||
4 | * RIPEMD-256 - RACE Integrity Primitives Evaluation Message Digest. | ||
5 | * | ||
6 | * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC | ||
7 | * | ||
8 | * Copyright (c) 2008 Adrian-Ken Rueegsegger <rueegsegger (at) swiss-it.ch> | ||
9 | * | ||
10 | * This program is free software; you can redistribute it and/or modify it | ||
11 | * under the terms of the GNU General Public License as published by the Free | ||
12 | * Software Foundation; either version 2 of the License, or (at your option) | ||
13 | * any later version. | ||
14 | * | ||
15 | */ | ||
16 | #include <linux/init.h> | ||
17 | #include <linux/module.h> | ||
18 | #include <linux/mm.h> | ||
19 | #include <linux/crypto.h> | ||
20 | #include <linux/cryptohash.h> | ||
21 | #include <linux/types.h> | ||
22 | #include <asm/byteorder.h> | ||
23 | |||
24 | #include "ripemd.h" | ||
25 | |||
26 | struct rmd256_ctx { | ||
27 | u64 byte_count; | ||
28 | u32 state[8]; | ||
29 | __le32 buffer[16]; | ||
30 | }; | ||
31 | |||
32 | #define K1 RMD_K1 | ||
33 | #define K2 RMD_K2 | ||
34 | #define K3 RMD_K3 | ||
35 | #define K4 RMD_K4 | ||
36 | #define KK1 RMD_K6 | ||
37 | #define KK2 RMD_K7 | ||
38 | #define KK3 RMD_K8 | ||
39 | #define KK4 RMD_K1 | ||
40 | |||
41 | #define F1(x, y, z) (x ^ y ^ z) /* XOR */ | ||
42 | #define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */ | ||
43 | #define F3(x, y, z) ((x | ~y) ^ z) | ||
44 | #define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */ | ||
45 | |||
46 | #define ROUND(a, b, c, d, f, k, x, s) { \ | ||
47 | (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \ | ||
48 | (a) = rol32((a), (s)); \ | ||
49 | } | ||
50 | |||
51 | static void rmd256_transform(u32 *state, const __le32 *in) | ||
52 | { | ||
53 | u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd, tmp; | ||
54 | |||
55 | /* Initialize left lane */ | ||
56 | aa = state[0]; | ||
57 | bb = state[1]; | ||
58 | cc = state[2]; | ||
59 | dd = state[3]; | ||
60 | |||
61 | /* Initialize right lane */ | ||
62 | aaa = state[4]; | ||
63 | bbb = state[5]; | ||
64 | ccc = state[6]; | ||
65 | ddd = state[7]; | ||
66 | |||
67 | /* round 1: left lane */ | ||
68 | ROUND(aa, bb, cc, dd, F1, K1, in[0], 11); | ||
69 | ROUND(dd, aa, bb, cc, F1, K1, in[1], 14); | ||
70 | ROUND(cc, dd, aa, bb, F1, K1, in[2], 15); | ||
71 | ROUND(bb, cc, dd, aa, F1, K1, in[3], 12); | ||
72 | ROUND(aa, bb, cc, dd, F1, K1, in[4], 5); | ||
73 | ROUND(dd, aa, bb, cc, F1, K1, in[5], 8); | ||
74 | ROUND(cc, dd, aa, bb, F1, K1, in[6], 7); | ||
75 | ROUND(bb, cc, dd, aa, F1, K1, in[7], 9); | ||
76 | ROUND(aa, bb, cc, dd, F1, K1, in[8], 11); | ||
77 | ROUND(dd, aa, bb, cc, F1, K1, in[9], 13); | ||
78 | ROUND(cc, dd, aa, bb, F1, K1, in[10], 14); | ||
79 | ROUND(bb, cc, dd, aa, F1, K1, in[11], 15); | ||
80 | ROUND(aa, bb, cc, dd, F1, K1, in[12], 6); | ||
81 | ROUND(dd, aa, bb, cc, F1, K1, in[13], 7); | ||
82 | ROUND(cc, dd, aa, bb, F1, K1, in[14], 9); | ||
83 | ROUND(bb, cc, dd, aa, F1, K1, in[15], 8); | ||
84 | |||
85 | /* round 1: right lane */ | ||
86 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8); | ||
87 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9); | ||
88 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9); | ||
89 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11); | ||
90 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13); | ||
91 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15); | ||
92 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15); | ||
93 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5); | ||
94 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7); | ||
95 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7); | ||
96 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8); | ||
97 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11); | ||
98 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14); | ||
99 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14); | ||
100 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12); | ||
101 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6); | ||
102 | |||
103 | /* Swap contents of "a" registers */ | ||
104 | tmp = aa; aa = aaa; aaa = tmp; | ||
105 | |||
106 | /* round 2: left lane */ | ||
107 | ROUND(aa, bb, cc, dd, F2, K2, in[7], 7); | ||
108 | ROUND(dd, aa, bb, cc, F2, K2, in[4], 6); | ||
109 | ROUND(cc, dd, aa, bb, F2, K2, in[13], 8); | ||
110 | ROUND(bb, cc, dd, aa, F2, K2, in[1], 13); | ||
111 | ROUND(aa, bb, cc, dd, F2, K2, in[10], 11); | ||
112 | ROUND(dd, aa, bb, cc, F2, K2, in[6], 9); | ||
113 | ROUND(cc, dd, aa, bb, F2, K2, in[15], 7); | ||
114 | ROUND(bb, cc, dd, aa, F2, K2, in[3], 15); | ||
115 | ROUND(aa, bb, cc, dd, F2, K2, in[12], 7); | ||
116 | ROUND(dd, aa, bb, cc, F2, K2, in[0], 12); | ||
117 | ROUND(cc, dd, aa, bb, F2, K2, in[9], 15); | ||
118 | ROUND(bb, cc, dd, aa, F2, K2, in[5], 9); | ||
119 | ROUND(aa, bb, cc, dd, F2, K2, in[2], 11); | ||
120 | ROUND(dd, aa, bb, cc, F2, K2, in[14], 7); | ||
121 | ROUND(cc, dd, aa, bb, F2, K2, in[11], 13); | ||
122 | ROUND(bb, cc, dd, aa, F2, K2, in[8], 12); | ||
123 | |||
124 | /* round 2: right lane */ | ||
125 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9); | ||
126 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13); | ||
127 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15); | ||
128 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7); | ||
129 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12); | ||
130 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8); | ||
131 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9); | ||
132 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11); | ||
133 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7); | ||
134 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7); | ||
135 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12); | ||
136 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7); | ||
137 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6); | ||
138 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15); | ||
139 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13); | ||
140 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11); | ||
141 | |||
142 | /* Swap contents of "b" registers */ | ||
143 | tmp = bb; bb = bbb; bbb = tmp; | ||
144 | |||
145 | /* round 3: left lane */ | ||
146 | ROUND(aa, bb, cc, dd, F3, K3, in[3], 11); | ||
147 | ROUND(dd, aa, bb, cc, F3, K3, in[10], 13); | ||
148 | ROUND(cc, dd, aa, bb, F3, K3, in[14], 6); | ||
149 | ROUND(bb, cc, dd, aa, F3, K3, in[4], 7); | ||
150 | ROUND(aa, bb, cc, dd, F3, K3, in[9], 14); | ||
151 | ROUND(dd, aa, bb, cc, F3, K3, in[15], 9); | ||
152 | ROUND(cc, dd, aa, bb, F3, K3, in[8], 13); | ||
153 | ROUND(bb, cc, dd, aa, F3, K3, in[1], 15); | ||
154 | ROUND(aa, bb, cc, dd, F3, K3, in[2], 14); | ||
155 | ROUND(dd, aa, bb, cc, F3, K3, in[7], 8); | ||
156 | ROUND(cc, dd, aa, bb, F3, K3, in[0], 13); | ||
157 | ROUND(bb, cc, dd, aa, F3, K3, in[6], 6); | ||
158 | ROUND(aa, bb, cc, dd, F3, K3, in[13], 5); | ||
159 | ROUND(dd, aa, bb, cc, F3, K3, in[11], 12); | ||
160 | ROUND(cc, dd, aa, bb, F3, K3, in[5], 7); | ||
161 | ROUND(bb, cc, dd, aa, F3, K3, in[12], 5); | ||
162 | |||
163 | /* round 3: right lane */ | ||
164 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9); | ||
165 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7); | ||
166 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15); | ||
167 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11); | ||
168 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8); | ||
169 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6); | ||
170 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6); | ||
171 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14); | ||
172 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12); | ||
173 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13); | ||
174 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5); | ||
175 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14); | ||
176 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13); | ||
177 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13); | ||
178 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7); | ||
179 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5); | ||
180 | |||
181 | /* Swap contents of "c" registers */ | ||
182 | tmp = cc; cc = ccc; ccc = tmp; | ||
183 | |||
184 | /* round 4: left lane */ | ||
185 | ROUND(aa, bb, cc, dd, F4, K4, in[1], 11); | ||
186 | ROUND(dd, aa, bb, cc, F4, K4, in[9], 12); | ||
187 | ROUND(cc, dd, aa, bb, F4, K4, in[11], 14); | ||
188 | ROUND(bb, cc, dd, aa, F4, K4, in[10], 15); | ||
189 | ROUND(aa, bb, cc, dd, F4, K4, in[0], 14); | ||
190 | ROUND(dd, aa, bb, cc, F4, K4, in[8], 15); | ||
191 | ROUND(cc, dd, aa, bb, F4, K4, in[12], 9); | ||
192 | ROUND(bb, cc, dd, aa, F4, K4, in[4], 8); | ||
193 | ROUND(aa, bb, cc, dd, F4, K4, in[13], 9); | ||
194 | ROUND(dd, aa, bb, cc, F4, K4, in[3], 14); | ||
195 | ROUND(cc, dd, aa, bb, F4, K4, in[7], 5); | ||
196 | ROUND(bb, cc, dd, aa, F4, K4, in[15], 6); | ||
197 | ROUND(aa, bb, cc, dd, F4, K4, in[14], 8); | ||
198 | ROUND(dd, aa, bb, cc, F4, K4, in[5], 6); | ||
199 | ROUND(cc, dd, aa, bb, F4, K4, in[6], 5); | ||
200 | ROUND(bb, cc, dd, aa, F4, K4, in[2], 12); | ||
201 | |||
202 | /* round 4: right lane */ | ||
203 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15); | ||
204 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5); | ||
205 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8); | ||
206 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11); | ||
207 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14); | ||
208 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14); | ||
209 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6); | ||
210 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14); | ||
211 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6); | ||
212 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9); | ||
213 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12); | ||
214 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9); | ||
215 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12); | ||
216 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5); | ||
217 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15); | ||
218 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8); | ||
219 | |||
220 | /* Swap contents of "d" registers */ | ||
221 | tmp = dd; dd = ddd; ddd = tmp; | ||
222 | |||
223 | /* combine results */ | ||
224 | state[0] += aa; | ||
225 | state[1] += bb; | ||
226 | state[2] += cc; | ||
227 | state[3] += dd; | ||
228 | state[4] += aaa; | ||
229 | state[5] += bbb; | ||
230 | state[6] += ccc; | ||
231 | state[7] += ddd; | ||
232 | |||
233 | return; | ||
234 | } | ||
235 | |||
236 | static void rmd256_init(struct crypto_tfm *tfm) | ||
237 | { | ||
238 | struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm); | ||
239 | |||
240 | rctx->byte_count = 0; | ||
241 | |||
242 | rctx->state[0] = RMD_H0; | ||
243 | rctx->state[1] = RMD_H1; | ||
244 | rctx->state[2] = RMD_H2; | ||
245 | rctx->state[3] = RMD_H3; | ||
246 | rctx->state[4] = RMD_H5; | ||
247 | rctx->state[5] = RMD_H6; | ||
248 | rctx->state[6] = RMD_H7; | ||
249 | rctx->state[7] = RMD_H8; | ||
250 | |||
251 | memset(rctx->buffer, 0, sizeof(rctx->buffer)); | ||
252 | } | ||
253 | |||
254 | static void rmd256_update(struct crypto_tfm *tfm, const u8 *data, | ||
255 | unsigned int len) | ||
256 | { | ||
257 | struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm); | ||
258 | const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); | ||
259 | |||
260 | rctx->byte_count += len; | ||
261 | |||
262 | /* Enough space in buffer? If so copy and we're done */ | ||
263 | if (avail > len) { | ||
264 | memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), | ||
265 | data, len); | ||
266 | return; | ||
267 | } | ||
268 | |||
269 | memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), | ||
270 | data, avail); | ||
271 | |||
272 | rmd256_transform(rctx->state, rctx->buffer); | ||
273 | data += avail; | ||
274 | len -= avail; | ||
275 | |||
276 | while (len >= sizeof(rctx->buffer)) { | ||
277 | memcpy(rctx->buffer, data, sizeof(rctx->buffer)); | ||
278 | rmd256_transform(rctx->state, rctx->buffer); | ||
279 | data += sizeof(rctx->buffer); | ||
280 | len -= sizeof(rctx->buffer); | ||
281 | } | ||
282 | |||
283 | memcpy(rctx->buffer, data, len); | ||
284 | } | ||
285 | |||
286 | /* Add padding and return the message digest. */ | ||
287 | static void rmd256_final(struct crypto_tfm *tfm, u8 *out) | ||
288 | { | ||
289 | struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm); | ||
290 | u32 i, index, padlen; | ||
291 | __le64 bits; | ||
292 | __le32 *dst = (__le32 *)out; | ||
293 | static const u8 padding[64] = { 0x80, }; | ||
294 | |||
295 | bits = cpu_to_le64(rctx->byte_count << 3); | ||
296 | |||
297 | /* Pad out to 56 mod 64 */ | ||
298 | index = rctx->byte_count & 0x3f; | ||
299 | padlen = (index < 56) ? (56 - index) : ((64+56) - index); | ||
300 | rmd256_update(tfm, padding, padlen); | ||
301 | |||
302 | /* Append length */ | ||
303 | rmd256_update(tfm, (const u8 *)&bits, sizeof(bits)); | ||
304 | |||
305 | /* Store state in digest */ | ||
306 | for (i = 0; i < 8; i++) | ||
307 | dst[i] = cpu_to_le32p(&rctx->state[i]); | ||
308 | |||
309 | /* Wipe context */ | ||
310 | memset(rctx, 0, sizeof(*rctx)); | ||
311 | } | ||
312 | |||
313 | static struct crypto_alg alg = { | ||
314 | .cra_name = "rmd256", | ||
315 | .cra_driver_name = "rmd256", | ||
316 | .cra_flags = CRYPTO_ALG_TYPE_DIGEST, | ||
317 | .cra_blocksize = RMD256_BLOCK_SIZE, | ||
318 | .cra_ctxsize = sizeof(struct rmd256_ctx), | ||
319 | .cra_module = THIS_MODULE, | ||
320 | .cra_list = LIST_HEAD_INIT(alg.cra_list), | ||
321 | .cra_u = { .digest = { | ||
322 | .dia_digestsize = RMD256_DIGEST_SIZE, | ||
323 | .dia_init = rmd256_init, | ||
324 | .dia_update = rmd256_update, | ||
325 | .dia_final = rmd256_final } } | ||
326 | }; | ||
327 | |||
328 | static int __init rmd256_mod_init(void) | ||
329 | { | ||
330 | return crypto_register_alg(&alg); | ||
331 | } | ||
332 | |||
333 | static void __exit rmd256_mod_fini(void) | ||
334 | { | ||
335 | crypto_unregister_alg(&alg); | ||
336 | } | ||
337 | |||
338 | module_init(rmd256_mod_init); | ||
339 | module_exit(rmd256_mod_fini); | ||
340 | |||
341 | MODULE_LICENSE("GPL"); | ||
342 | MODULE_DESCRIPTION("RIPEMD-256 Message Digest"); | ||
343 | |||
344 | MODULE_ALIAS("rmd256"); | ||