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c555c28d AKR |
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 | u32 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)) + (x) + (k); \ | |
48 | (a) = rol32((a), (s)); \ | |
49 | } | |
50 | ||
51 | static void rmd256_transform(u32 *state, u32 const *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 inline void le32_to_cpu_array(u32 *buf, unsigned int words) | |
237 | { | |
238 | while (words--) { | |
239 | le32_to_cpus(buf); | |
240 | buf++; | |
241 | } | |
242 | } | |
243 | ||
244 | static inline void cpu_to_le32_array(u32 *buf, unsigned int words) | |
245 | { | |
246 | while (words--) { | |
247 | cpu_to_le32s(buf); | |
248 | buf++; | |
249 | } | |
250 | } | |
251 | ||
252 | static inline void rmd256_transform_helper(struct rmd256_ctx *ctx) | |
253 | { | |
254 | le32_to_cpu_array(ctx->buffer, sizeof(ctx->buffer) / sizeof(u32)); | |
255 | rmd256_transform(ctx->state, ctx->buffer); | |
256 | } | |
257 | ||
258 | static void rmd256_init(struct crypto_tfm *tfm) | |
259 | { | |
260 | struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm); | |
261 | ||
262 | rctx->byte_count = 0; | |
263 | ||
264 | rctx->state[0] = RMD_H0; | |
265 | rctx->state[1] = RMD_H1; | |
266 | rctx->state[2] = RMD_H2; | |
267 | rctx->state[3] = RMD_H3; | |
268 | rctx->state[4] = RMD_H5; | |
269 | rctx->state[5] = RMD_H6; | |
270 | rctx->state[6] = RMD_H7; | |
271 | rctx->state[7] = RMD_H8; | |
272 | ||
273 | memset(rctx->buffer, 0, sizeof(rctx->buffer)); | |
274 | } | |
275 | ||
276 | static void rmd256_update(struct crypto_tfm *tfm, const u8 *data, | |
277 | unsigned int len) | |
278 | { | |
279 | struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm); | |
280 | const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); | |
281 | ||
282 | rctx->byte_count += len; | |
283 | ||
284 | /* Enough space in buffer? If so copy and we're done */ | |
285 | if (avail > len) { | |
286 | memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), | |
287 | data, len); | |
288 | return; | |
289 | } | |
290 | ||
291 | memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), | |
292 | data, avail); | |
293 | ||
294 | rmd256_transform_helper(rctx); | |
295 | data += avail; | |
296 | len -= avail; | |
297 | ||
298 | while (len >= sizeof(rctx->buffer)) { | |
299 | memcpy(rctx->buffer, data, sizeof(rctx->buffer)); | |
300 | rmd256_transform_helper(rctx); | |
301 | data += sizeof(rctx->buffer); | |
302 | len -= sizeof(rctx->buffer); | |
303 | } | |
304 | ||
305 | memcpy(rctx->buffer, data, len); | |
306 | } | |
307 | ||
308 | /* Add padding and return the message digest. */ | |
309 | static void rmd256_final(struct crypto_tfm *tfm, u8 *out) | |
310 | { | |
311 | struct rmd256_ctx *rctx = crypto_tfm_ctx(tfm); | |
312 | u32 index, padlen; | |
313 | u64 bits; | |
314 | static const u8 padding[64] = { 0x80, }; | |
315 | bits = rctx->byte_count << 3; | |
316 | ||
317 | /* Pad out to 56 mod 64 */ | |
318 | index = rctx->byte_count & 0x3f; | |
319 | padlen = (index < 56) ? (56 - index) : ((64+56) - index); | |
320 | rmd256_update(tfm, padding, padlen); | |
321 | ||
322 | /* Append length */ | |
323 | rmd256_update(tfm, (const u8 *)&bits, sizeof(bits)); | |
324 | ||
325 | /* Store state in digest */ | |
326 | memcpy(out, rctx->state, sizeof(rctx->state)); | |
327 | ||
328 | /* Wipe context */ | |
329 | memset(rctx, 0, sizeof(*rctx)); | |
330 | } | |
331 | ||
332 | static struct crypto_alg alg = { | |
333 | .cra_name = "rmd256", | |
334 | .cra_driver_name = "rmd256", | |
335 | .cra_flags = CRYPTO_ALG_TYPE_DIGEST, | |
336 | .cra_blocksize = RMD256_BLOCK_SIZE, | |
337 | .cra_ctxsize = sizeof(struct rmd256_ctx), | |
338 | .cra_module = THIS_MODULE, | |
339 | .cra_list = LIST_HEAD_INIT(alg.cra_list), | |
340 | .cra_u = { .digest = { | |
341 | .dia_digestsize = RMD256_DIGEST_SIZE, | |
342 | .dia_init = rmd256_init, | |
343 | .dia_update = rmd256_update, | |
344 | .dia_final = rmd256_final } } | |
345 | }; | |
346 | ||
347 | static int __init rmd256_mod_init(void) | |
348 | { | |
349 | return crypto_register_alg(&alg); | |
350 | } | |
351 | ||
352 | static void __exit rmd256_mod_fini(void) | |
353 | { | |
354 | crypto_unregister_alg(&alg); | |
355 | } | |
356 | ||
357 | module_init(rmd256_mod_init); | |
358 | module_exit(rmd256_mod_fini); | |
359 | ||
360 | MODULE_LICENSE("GPL"); | |
361 | MODULE_DESCRIPTION("RIPEMD-256 Message Digest"); | |
362 | ||
363 | MODULE_ALIAS("rmd256"); |