Root/
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 <crypto/internal/hash.h> |
17 | #include <linux/init.h> |
18 | #include <linux/module.h> |
19 | #include <linux/mm.h> |
20 | #include <linux/types.h> |
21 | #include <asm/byteorder.h> |
22 | |
23 | #include "ripemd.h" |
24 | |
25 | struct rmd256_ctx { |
26 | u64 byte_count; |
27 | u32 state[8]; |
28 | __le32 buffer[16]; |
29 | }; |
30 | |
31 | #define K1 RMD_K1 |
32 | #define K2 RMD_K2 |
33 | #define K3 RMD_K3 |
34 | #define K4 RMD_K4 |
35 | #define KK1 RMD_K6 |
36 | #define KK2 RMD_K7 |
37 | #define KK3 RMD_K8 |
38 | #define KK4 RMD_K1 |
39 | |
40 | #define F1(x, y, z) (x ^ y ^ z) /* XOR */ |
41 | #define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */ |
42 | #define F3(x, y, z) ((x | ~y) ^ z) |
43 | #define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */ |
44 | |
45 | #define ROUND(a, b, c, d, f, k, x, s) { \ |
46 | (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \ |
47 | (a) = rol32((a), (s)); \ |
48 | } |
49 | |
50 | static void rmd256_transform(u32 *state, const __le32 *in) |
51 | { |
52 | u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd, tmp; |
53 | |
54 | /* Initialize left lane */ |
55 | aa = state[0]; |
56 | bb = state[1]; |
57 | cc = state[2]; |
58 | dd = state[3]; |
59 | |
60 | /* Initialize right lane */ |
61 | aaa = state[4]; |
62 | bbb = state[5]; |
63 | ccc = state[6]; |
64 | ddd = state[7]; |
65 | |
66 | /* round 1: left lane */ |
67 | ROUND(aa, bb, cc, dd, F1, K1, in[0], 11); |
68 | ROUND(dd, aa, bb, cc, F1, K1, in[1], 14); |
69 | ROUND(cc, dd, aa, bb, F1, K1, in[2], 15); |
70 | ROUND(bb, cc, dd, aa, F1, K1, in[3], 12); |
71 | ROUND(aa, bb, cc, dd, F1, K1, in[4], 5); |
72 | ROUND(dd, aa, bb, cc, F1, K1, in[5], 8); |
73 | ROUND(cc, dd, aa, bb, F1, K1, in[6], 7); |
74 | ROUND(bb, cc, dd, aa, F1, K1, in[7], 9); |
75 | ROUND(aa, bb, cc, dd, F1, K1, in[8], 11); |
76 | ROUND(dd, aa, bb, cc, F1, K1, in[9], 13); |
77 | ROUND(cc, dd, aa, bb, F1, K1, in[10], 14); |
78 | ROUND(bb, cc, dd, aa, F1, K1, in[11], 15); |
79 | ROUND(aa, bb, cc, dd, F1, K1, in[12], 6); |
80 | ROUND(dd, aa, bb, cc, F1, K1, in[13], 7); |
81 | ROUND(cc, dd, aa, bb, F1, K1, in[14], 9); |
82 | ROUND(bb, cc, dd, aa, F1, K1, in[15], 8); |
83 | |
84 | /* round 1: right lane */ |
85 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8); |
86 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9); |
87 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9); |
88 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11); |
89 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13); |
90 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15); |
91 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15); |
92 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5); |
93 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7); |
94 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7); |
95 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8); |
96 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11); |
97 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14); |
98 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14); |
99 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12); |
100 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6); |
101 | |
102 | /* Swap contents of "a" registers */ |
103 | tmp = aa; aa = aaa; aaa = tmp; |
104 | |
105 | /* round 2: left lane */ |
106 | ROUND(aa, bb, cc, dd, F2, K2, in[7], 7); |
107 | ROUND(dd, aa, bb, cc, F2, K2, in[4], 6); |
108 | ROUND(cc, dd, aa, bb, F2, K2, in[13], 8); |
109 | ROUND(bb, cc, dd, aa, F2, K2, in[1], 13); |
110 | ROUND(aa, bb, cc, dd, F2, K2, in[10], 11); |
111 | ROUND(dd, aa, bb, cc, F2, K2, in[6], 9); |
112 | ROUND(cc, dd, aa, bb, F2, K2, in[15], 7); |
113 | ROUND(bb, cc, dd, aa, F2, K2, in[3], 15); |
114 | ROUND(aa, bb, cc, dd, F2, K2, in[12], 7); |
115 | ROUND(dd, aa, bb, cc, F2, K2, in[0], 12); |
116 | ROUND(cc, dd, aa, bb, F2, K2, in[9], 15); |
117 | ROUND(bb, cc, dd, aa, F2, K2, in[5], 9); |
118 | ROUND(aa, bb, cc, dd, F2, K2, in[2], 11); |
119 | ROUND(dd, aa, bb, cc, F2, K2, in[14], 7); |
120 | ROUND(cc, dd, aa, bb, F2, K2, in[11], 13); |
121 | ROUND(bb, cc, dd, aa, F2, K2, in[8], 12); |
122 | |
123 | /* round 2: right lane */ |
124 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9); |
125 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13); |
126 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15); |
127 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7); |
128 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12); |
129 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8); |
130 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9); |
131 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11); |
132 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7); |
133 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7); |
134 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12); |
135 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7); |
136 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6); |
137 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15); |
138 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13); |
139 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11); |
140 | |
141 | /* Swap contents of "b" registers */ |
142 | tmp = bb; bb = bbb; bbb = tmp; |
143 | |
144 | /* round 3: left lane */ |
145 | ROUND(aa, bb, cc, dd, F3, K3, in[3], 11); |
146 | ROUND(dd, aa, bb, cc, F3, K3, in[10], 13); |
147 | ROUND(cc, dd, aa, bb, F3, K3, in[14], 6); |
148 | ROUND(bb, cc, dd, aa, F3, K3, in[4], 7); |
149 | ROUND(aa, bb, cc, dd, F3, K3, in[9], 14); |
150 | ROUND(dd, aa, bb, cc, F3, K3, in[15], 9); |
151 | ROUND(cc, dd, aa, bb, F3, K3, in[8], 13); |
152 | ROUND(bb, cc, dd, aa, F3, K3, in[1], 15); |
153 | ROUND(aa, bb, cc, dd, F3, K3, in[2], 14); |
154 | ROUND(dd, aa, bb, cc, F3, K3, in[7], 8); |
155 | ROUND(cc, dd, aa, bb, F3, K3, in[0], 13); |
156 | ROUND(bb, cc, dd, aa, F3, K3, in[6], 6); |
157 | ROUND(aa, bb, cc, dd, F3, K3, in[13], 5); |
158 | ROUND(dd, aa, bb, cc, F3, K3, in[11], 12); |
159 | ROUND(cc, dd, aa, bb, F3, K3, in[5], 7); |
160 | ROUND(bb, cc, dd, aa, F3, K3, in[12], 5); |
161 | |
162 | /* round 3: right lane */ |
163 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9); |
164 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7); |
165 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15); |
166 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11); |
167 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8); |
168 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6); |
169 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6); |
170 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14); |
171 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12); |
172 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13); |
173 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5); |
174 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14); |
175 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13); |
176 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13); |
177 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7); |
178 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5); |
179 | |
180 | /* Swap contents of "c" registers */ |
181 | tmp = cc; cc = ccc; ccc = tmp; |
182 | |
183 | /* round 4: left lane */ |
184 | ROUND(aa, bb, cc, dd, F4, K4, in[1], 11); |
185 | ROUND(dd, aa, bb, cc, F4, K4, in[9], 12); |
186 | ROUND(cc, dd, aa, bb, F4, K4, in[11], 14); |
187 | ROUND(bb, cc, dd, aa, F4, K4, in[10], 15); |
188 | ROUND(aa, bb, cc, dd, F4, K4, in[0], 14); |
189 | ROUND(dd, aa, bb, cc, F4, K4, in[8], 15); |
190 | ROUND(cc, dd, aa, bb, F4, K4, in[12], 9); |
191 | ROUND(bb, cc, dd, aa, F4, K4, in[4], 8); |
192 | ROUND(aa, bb, cc, dd, F4, K4, in[13], 9); |
193 | ROUND(dd, aa, bb, cc, F4, K4, in[3], 14); |
194 | ROUND(cc, dd, aa, bb, F4, K4, in[7], 5); |
195 | ROUND(bb, cc, dd, aa, F4, K4, in[15], 6); |
196 | ROUND(aa, bb, cc, dd, F4, K4, in[14], 8); |
197 | ROUND(dd, aa, bb, cc, F4, K4, in[5], 6); |
198 | ROUND(cc, dd, aa, bb, F4, K4, in[6], 5); |
199 | ROUND(bb, cc, dd, aa, F4, K4, in[2], 12); |
200 | |
201 | /* round 4: right lane */ |
202 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15); |
203 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5); |
204 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8); |
205 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11); |
206 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14); |
207 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14); |
208 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6); |
209 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14); |
210 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6); |
211 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9); |
212 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12); |
213 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9); |
214 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12); |
215 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5); |
216 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15); |
217 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8); |
218 | |
219 | /* Swap contents of "d" registers */ |
220 | tmp = dd; dd = ddd; ddd = tmp; |
221 | |
222 | /* combine results */ |
223 | state[0] += aa; |
224 | state[1] += bb; |
225 | state[2] += cc; |
226 | state[3] += dd; |
227 | state[4] += aaa; |
228 | state[5] += bbb; |
229 | state[6] += ccc; |
230 | state[7] += ddd; |
231 | |
232 | return; |
233 | } |
234 | |
235 | static int rmd256_init(struct shash_desc *desc) |
236 | { |
237 | struct rmd256_ctx *rctx = shash_desc_ctx(desc); |
238 | |
239 | rctx->byte_count = 0; |
240 | |
241 | rctx->state[0] = RMD_H0; |
242 | rctx->state[1] = RMD_H1; |
243 | rctx->state[2] = RMD_H2; |
244 | rctx->state[3] = RMD_H3; |
245 | rctx->state[4] = RMD_H5; |
246 | rctx->state[5] = RMD_H6; |
247 | rctx->state[6] = RMD_H7; |
248 | rctx->state[7] = RMD_H8; |
249 | |
250 | memset(rctx->buffer, 0, sizeof(rctx->buffer)); |
251 | |
252 | return 0; |
253 | } |
254 | |
255 | static int rmd256_update(struct shash_desc *desc, const u8 *data, |
256 | unsigned int len) |
257 | { |
258 | struct rmd256_ctx *rctx = shash_desc_ctx(desc); |
259 | const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); |
260 | |
261 | rctx->byte_count += len; |
262 | |
263 | /* Enough space in buffer? If so copy and we're done */ |
264 | if (avail > len) { |
265 | memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), |
266 | data, len); |
267 | goto out; |
268 | } |
269 | |
270 | memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), |
271 | data, avail); |
272 | |
273 | rmd256_transform(rctx->state, rctx->buffer); |
274 | data += avail; |
275 | len -= avail; |
276 | |
277 | while (len >= sizeof(rctx->buffer)) { |
278 | memcpy(rctx->buffer, data, sizeof(rctx->buffer)); |
279 | rmd256_transform(rctx->state, rctx->buffer); |
280 | data += sizeof(rctx->buffer); |
281 | len -= sizeof(rctx->buffer); |
282 | } |
283 | |
284 | memcpy(rctx->buffer, data, len); |
285 | |
286 | out: |
287 | return 0; |
288 | } |
289 | |
290 | /* Add padding and return the message digest. */ |
291 | static int rmd256_final(struct shash_desc *desc, u8 *out) |
292 | { |
293 | struct rmd256_ctx *rctx = shash_desc_ctx(desc); |
294 | u32 i, index, padlen; |
295 | __le64 bits; |
296 | __le32 *dst = (__le32 *)out; |
297 | static const u8 padding[64] = { 0x80, }; |
298 | |
299 | bits = cpu_to_le64(rctx->byte_count << 3); |
300 | |
301 | /* Pad out to 56 mod 64 */ |
302 | index = rctx->byte_count & 0x3f; |
303 | padlen = (index < 56) ? (56 - index) : ((64+56) - index); |
304 | rmd256_update(desc, padding, padlen); |
305 | |
306 | /* Append length */ |
307 | rmd256_update(desc, (const u8 *)&bits, sizeof(bits)); |
308 | |
309 | /* Store state in digest */ |
310 | for (i = 0; i < 8; i++) |
311 | dst[i] = cpu_to_le32p(&rctx->state[i]); |
312 | |
313 | /* Wipe context */ |
314 | memset(rctx, 0, sizeof(*rctx)); |
315 | |
316 | return 0; |
317 | } |
318 | |
319 | static struct shash_alg alg = { |
320 | .digestsize = RMD256_DIGEST_SIZE, |
321 | .init = rmd256_init, |
322 | .update = rmd256_update, |
323 | .final = rmd256_final, |
324 | .descsize = sizeof(struct rmd256_ctx), |
325 | .base = { |
326 | .cra_name = "rmd256", |
327 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
328 | .cra_blocksize = RMD256_BLOCK_SIZE, |
329 | .cra_module = THIS_MODULE, |
330 | } |
331 | }; |
332 | |
333 | static int __init rmd256_mod_init(void) |
334 | { |
335 | return crypto_register_shash(&alg); |
336 | } |
337 | |
338 | static void __exit rmd256_mod_fini(void) |
339 | { |
340 | crypto_unregister_shash(&alg); |
341 | } |
342 | |
343 | module_init(rmd256_mod_init); |
344 | module_exit(rmd256_mod_fini); |
345 | |
346 | MODULE_LICENSE("GPL"); |
347 | MODULE_DESCRIPTION("RIPEMD-256 Message Digest"); |
348 |
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