Root/
1 | /* |
2 | * Cryptographic API. |
3 | * |
4 | * RIPEMD-128 - 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 <ken@codelabs.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 rmd128_ctx { |
26 | u64 byte_count; |
27 | u32 state[4]; |
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 rmd128_transform(u32 *state, const __le32 *in) |
51 | { |
52 | u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd; |
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[0]; |
62 | bbb = state[1]; |
63 | ccc = state[2]; |
64 | ddd = state[3]; |
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 2: left lane */ |
85 | ROUND(aa, bb, cc, dd, F2, K2, in[7], 7); |
86 | ROUND(dd, aa, bb, cc, F2, K2, in[4], 6); |
87 | ROUND(cc, dd, aa, bb, F2, K2, in[13], 8); |
88 | ROUND(bb, cc, dd, aa, F2, K2, in[1], 13); |
89 | ROUND(aa, bb, cc, dd, F2, K2, in[10], 11); |
90 | ROUND(dd, aa, bb, cc, F2, K2, in[6], 9); |
91 | ROUND(cc, dd, aa, bb, F2, K2, in[15], 7); |
92 | ROUND(bb, cc, dd, aa, F2, K2, in[3], 15); |
93 | ROUND(aa, bb, cc, dd, F2, K2, in[12], 7); |
94 | ROUND(dd, aa, bb, cc, F2, K2, in[0], 12); |
95 | ROUND(cc, dd, aa, bb, F2, K2, in[9], 15); |
96 | ROUND(bb, cc, dd, aa, F2, K2, in[5], 9); |
97 | ROUND(aa, bb, cc, dd, F2, K2, in[2], 11); |
98 | ROUND(dd, aa, bb, cc, F2, K2, in[14], 7); |
99 | ROUND(cc, dd, aa, bb, F2, K2, in[11], 13); |
100 | ROUND(bb, cc, dd, aa, F2, K2, in[8], 12); |
101 | |
102 | /* round 3: left lane */ |
103 | ROUND(aa, bb, cc, dd, F3, K3, in[3], 11); |
104 | ROUND(dd, aa, bb, cc, F3, K3, in[10], 13); |
105 | ROUND(cc, dd, aa, bb, F3, K3, in[14], 6); |
106 | ROUND(bb, cc, dd, aa, F3, K3, in[4], 7); |
107 | ROUND(aa, bb, cc, dd, F3, K3, in[9], 14); |
108 | ROUND(dd, aa, bb, cc, F3, K3, in[15], 9); |
109 | ROUND(cc, dd, aa, bb, F3, K3, in[8], 13); |
110 | ROUND(bb, cc, dd, aa, F3, K3, in[1], 15); |
111 | ROUND(aa, bb, cc, dd, F3, K3, in[2], 14); |
112 | ROUND(dd, aa, bb, cc, F3, K3, in[7], 8); |
113 | ROUND(cc, dd, aa, bb, F3, K3, in[0], 13); |
114 | ROUND(bb, cc, dd, aa, F3, K3, in[6], 6); |
115 | ROUND(aa, bb, cc, dd, F3, K3, in[13], 5); |
116 | ROUND(dd, aa, bb, cc, F3, K3, in[11], 12); |
117 | ROUND(cc, dd, aa, bb, F3, K3, in[5], 7); |
118 | ROUND(bb, cc, dd, aa, F3, K3, in[12], 5); |
119 | |
120 | /* round 4: left lane */ |
121 | ROUND(aa, bb, cc, dd, F4, K4, in[1], 11); |
122 | ROUND(dd, aa, bb, cc, F4, K4, in[9], 12); |
123 | ROUND(cc, dd, aa, bb, F4, K4, in[11], 14); |
124 | ROUND(bb, cc, dd, aa, F4, K4, in[10], 15); |
125 | ROUND(aa, bb, cc, dd, F4, K4, in[0], 14); |
126 | ROUND(dd, aa, bb, cc, F4, K4, in[8], 15); |
127 | ROUND(cc, dd, aa, bb, F4, K4, in[12], 9); |
128 | ROUND(bb, cc, dd, aa, F4, K4, in[4], 8); |
129 | ROUND(aa, bb, cc, dd, F4, K4, in[13], 9); |
130 | ROUND(dd, aa, bb, cc, F4, K4, in[3], 14); |
131 | ROUND(cc, dd, aa, bb, F4, K4, in[7], 5); |
132 | ROUND(bb, cc, dd, aa, F4, K4, in[15], 6); |
133 | ROUND(aa, bb, cc, dd, F4, K4, in[14], 8); |
134 | ROUND(dd, aa, bb, cc, F4, K4, in[5], 6); |
135 | ROUND(cc, dd, aa, bb, F4, K4, in[6], 5); |
136 | ROUND(bb, cc, dd, aa, F4, K4, in[2], 12); |
137 | |
138 | /* round 1: right lane */ |
139 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8); |
140 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9); |
141 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9); |
142 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11); |
143 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13); |
144 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15); |
145 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15); |
146 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5); |
147 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7); |
148 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7); |
149 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8); |
150 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11); |
151 | ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14); |
152 | ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14); |
153 | ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12); |
154 | ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6); |
155 | |
156 | /* round 2: right lane */ |
157 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9); |
158 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13); |
159 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15); |
160 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7); |
161 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12); |
162 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8); |
163 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9); |
164 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11); |
165 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7); |
166 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7); |
167 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12); |
168 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7); |
169 | ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6); |
170 | ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15); |
171 | ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13); |
172 | ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11); |
173 | |
174 | /* round 3: right lane */ |
175 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9); |
176 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7); |
177 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15); |
178 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11); |
179 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8); |
180 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6); |
181 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6); |
182 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14); |
183 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12); |
184 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13); |
185 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5); |
186 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14); |
187 | ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13); |
188 | ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13); |
189 | ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7); |
190 | ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5); |
191 | |
192 | /* round 4: right lane */ |
193 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15); |
194 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5); |
195 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8); |
196 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11); |
197 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14); |
198 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14); |
199 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6); |
200 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14); |
201 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6); |
202 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9); |
203 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12); |
204 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9); |
205 | ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12); |
206 | ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5); |
207 | ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15); |
208 | ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8); |
209 | |
210 | /* combine results */ |
211 | ddd += cc + state[1]; /* final result for state[0] */ |
212 | state[1] = state[2] + dd + aaa; |
213 | state[2] = state[3] + aa + bbb; |
214 | state[3] = state[0] + bb + ccc; |
215 | state[0] = ddd; |
216 | |
217 | return; |
218 | } |
219 | |
220 | static int rmd128_init(struct shash_desc *desc) |
221 | { |
222 | struct rmd128_ctx *rctx = shash_desc_ctx(desc); |
223 | |
224 | rctx->byte_count = 0; |
225 | |
226 | rctx->state[0] = RMD_H0; |
227 | rctx->state[1] = RMD_H1; |
228 | rctx->state[2] = RMD_H2; |
229 | rctx->state[3] = RMD_H3; |
230 | |
231 | memset(rctx->buffer, 0, sizeof(rctx->buffer)); |
232 | |
233 | return 0; |
234 | } |
235 | |
236 | static int rmd128_update(struct shash_desc *desc, const u8 *data, |
237 | unsigned int len) |
238 | { |
239 | struct rmd128_ctx *rctx = shash_desc_ctx(desc); |
240 | const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); |
241 | |
242 | rctx->byte_count += len; |
243 | |
244 | /* Enough space in buffer? If so copy and we're done */ |
245 | if (avail > len) { |
246 | memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), |
247 | data, len); |
248 | goto out; |
249 | } |
250 | |
251 | memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), |
252 | data, avail); |
253 | |
254 | rmd128_transform(rctx->state, rctx->buffer); |
255 | data += avail; |
256 | len -= avail; |
257 | |
258 | while (len >= sizeof(rctx->buffer)) { |
259 | memcpy(rctx->buffer, data, sizeof(rctx->buffer)); |
260 | rmd128_transform(rctx->state, rctx->buffer); |
261 | data += sizeof(rctx->buffer); |
262 | len -= sizeof(rctx->buffer); |
263 | } |
264 | |
265 | memcpy(rctx->buffer, data, len); |
266 | |
267 | out: |
268 | return 0; |
269 | } |
270 | |
271 | /* Add padding and return the message digest. */ |
272 | static int rmd128_final(struct shash_desc *desc, u8 *out) |
273 | { |
274 | struct rmd128_ctx *rctx = shash_desc_ctx(desc); |
275 | u32 i, index, padlen; |
276 | __le64 bits; |
277 | __le32 *dst = (__le32 *)out; |
278 | static const u8 padding[64] = { 0x80, }; |
279 | |
280 | bits = cpu_to_le64(rctx->byte_count << 3); |
281 | |
282 | /* Pad out to 56 mod 64 */ |
283 | index = rctx->byte_count & 0x3f; |
284 | padlen = (index < 56) ? (56 - index) : ((64+56) - index); |
285 | rmd128_update(desc, padding, padlen); |
286 | |
287 | /* Append length */ |
288 | rmd128_update(desc, (const u8 *)&bits, sizeof(bits)); |
289 | |
290 | /* Store state in digest */ |
291 | for (i = 0; i < 4; i++) |
292 | dst[i] = cpu_to_le32p(&rctx->state[i]); |
293 | |
294 | /* Wipe context */ |
295 | memset(rctx, 0, sizeof(*rctx)); |
296 | |
297 | return 0; |
298 | } |
299 | |
300 | static struct shash_alg alg = { |
301 | .digestsize = RMD128_DIGEST_SIZE, |
302 | .init = rmd128_init, |
303 | .update = rmd128_update, |
304 | .final = rmd128_final, |
305 | .descsize = sizeof(struct rmd128_ctx), |
306 | .base = { |
307 | .cra_name = "rmd128", |
308 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
309 | .cra_blocksize = RMD128_BLOCK_SIZE, |
310 | .cra_module = THIS_MODULE, |
311 | } |
312 | }; |
313 | |
314 | static int __init rmd128_mod_init(void) |
315 | { |
316 | return crypto_register_shash(&alg); |
317 | } |
318 | |
319 | static void __exit rmd128_mod_fini(void) |
320 | { |
321 | crypto_unregister_shash(&alg); |
322 | } |
323 | |
324 | module_init(rmd128_mod_init); |
325 | module_exit(rmd128_mod_fini); |
326 | |
327 | MODULE_LICENSE("GPL"); |
328 | MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>"); |
329 | MODULE_DESCRIPTION("RIPEMD-128 Message Digest"); |
330 |
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