1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Cryptographic API. |
4 | * |
5 | * RIPEMD-160 - RACE Integrity Primitives Evaluation Message Digest. |
6 | * |
7 | * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC |
8 | * |
9 | * Copyright (c) 2008 Adrian-Ken Rueegsegger <ken@codelabs.ch> |
10 | */ |
11 | #include <crypto/internal/hash.h> |
12 | #include <linux/init.h> |
13 | #include <linux/module.h> |
14 | #include <linux/mm.h> |
15 | #include <linux/types.h> |
16 | #include <asm/byteorder.h> |
17 | |
18 | #include "ripemd.h" |
19 | |
20 | struct rmd160_ctx { |
21 | u64 byte_count; |
22 | u32 state[5]; |
23 | __le32 buffer[16]; |
24 | }; |
25 | |
26 | #define K1 RMD_K1 |
27 | #define K2 RMD_K2 |
28 | #define K3 RMD_K3 |
29 | #define K4 RMD_K4 |
30 | #define K5 RMD_K5 |
31 | #define KK1 RMD_K6 |
32 | #define KK2 RMD_K7 |
33 | #define KK3 RMD_K8 |
34 | #define KK4 RMD_K9 |
35 | #define KK5 RMD_K1 |
36 | |
37 | #define F1(x, y, z) (x ^ y ^ z) /* XOR */ |
38 | #define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */ |
39 | #define F3(x, y, z) ((x | ~y) ^ z) |
40 | #define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */ |
41 | #define F5(x, y, z) (x ^ (y | ~z)) |
42 | |
43 | #define ROUND(a, b, c, d, e, f, k, x, s) { \ |
44 | (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \ |
45 | (a) = rol32((a), (s)) + (e); \ |
46 | (c) = rol32((c), 10); \ |
47 | } |
48 | |
49 | static void rmd160_transform(u32 *state, const __le32 *in) |
50 | { |
51 | u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee; |
52 | |
53 | /* Initialize left lane */ |
54 | aa = state[0]; |
55 | bb = state[1]; |
56 | cc = state[2]; |
57 | dd = state[3]; |
58 | ee = state[4]; |
59 | |
60 | /* Initialize right lane */ |
61 | aaa = state[0]; |
62 | bbb = state[1]; |
63 | ccc = state[2]; |
64 | ddd = state[3]; |
65 | eee = state[4]; |
66 | |
67 | /* round 1: left lane */ |
68 | ROUND(aa, bb, cc, dd, ee, F1, K1, in[0], 11); |
69 | ROUND(ee, aa, bb, cc, dd, F1, K1, in[1], 14); |
70 | ROUND(dd, ee, aa, bb, cc, F1, K1, in[2], 15); |
71 | ROUND(cc, dd, ee, aa, bb, F1, K1, in[3], 12); |
72 | ROUND(bb, cc, dd, ee, aa, F1, K1, in[4], 5); |
73 | ROUND(aa, bb, cc, dd, ee, F1, K1, in[5], 8); |
74 | ROUND(ee, aa, bb, cc, dd, F1, K1, in[6], 7); |
75 | ROUND(dd, ee, aa, bb, cc, F1, K1, in[7], 9); |
76 | ROUND(cc, dd, ee, aa, bb, F1, K1, in[8], 11); |
77 | ROUND(bb, cc, dd, ee, aa, F1, K1, in[9], 13); |
78 | ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14); |
79 | ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15); |
80 | ROUND(dd, ee, aa, bb, cc, F1, K1, in[12], 6); |
81 | ROUND(cc, dd, ee, aa, bb, F1, K1, in[13], 7); |
82 | ROUND(bb, cc, dd, ee, aa, F1, K1, in[14], 9); |
83 | ROUND(aa, bb, cc, dd, ee, F1, K1, in[15], 8); |
84 | |
85 | /* round 2: left lane" */ |
86 | ROUND(ee, aa, bb, cc, dd, F2, K2, in[7], 7); |
87 | ROUND(dd, ee, aa, bb, cc, F2, K2, in[4], 6); |
88 | ROUND(cc, dd, ee, aa, bb, F2, K2, in[13], 8); |
89 | ROUND(bb, cc, dd, ee, aa, F2, K2, in[1], 13); |
90 | ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11); |
91 | ROUND(ee, aa, bb, cc, dd, F2, K2, in[6], 9); |
92 | ROUND(dd, ee, aa, bb, cc, F2, K2, in[15], 7); |
93 | ROUND(cc, dd, ee, aa, bb, F2, K2, in[3], 15); |
94 | ROUND(bb, cc, dd, ee, aa, F2, K2, in[12], 7); |
95 | ROUND(aa, bb, cc, dd, ee, F2, K2, in[0], 12); |
96 | ROUND(ee, aa, bb, cc, dd, F2, K2, in[9], 15); |
97 | ROUND(dd, ee, aa, bb, cc, F2, K2, in[5], 9); |
98 | ROUND(cc, dd, ee, aa, bb, F2, K2, in[2], 11); |
99 | ROUND(bb, cc, dd, ee, aa, F2, K2, in[14], 7); |
100 | ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13); |
101 | ROUND(ee, aa, bb, cc, dd, F2, K2, in[8], 12); |
102 | |
103 | /* round 3: left lane" */ |
104 | ROUND(dd, ee, aa, bb, cc, F3, K3, in[3], 11); |
105 | ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13); |
106 | ROUND(bb, cc, dd, ee, aa, F3, K3, in[14], 6); |
107 | ROUND(aa, bb, cc, dd, ee, F3, K3, in[4], 7); |
108 | ROUND(ee, aa, bb, cc, dd, F3, K3, in[9], 14); |
109 | ROUND(dd, ee, aa, bb, cc, F3, K3, in[15], 9); |
110 | ROUND(cc, dd, ee, aa, bb, F3, K3, in[8], 13); |
111 | ROUND(bb, cc, dd, ee, aa, F3, K3, in[1], 15); |
112 | ROUND(aa, bb, cc, dd, ee, F3, K3, in[2], 14); |
113 | ROUND(ee, aa, bb, cc, dd, F3, K3, in[7], 8); |
114 | ROUND(dd, ee, aa, bb, cc, F3, K3, in[0], 13); |
115 | ROUND(cc, dd, ee, aa, bb, F3, K3, in[6], 6); |
116 | ROUND(bb, cc, dd, ee, aa, F3, K3, in[13], 5); |
117 | ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12); |
118 | ROUND(ee, aa, bb, cc, dd, F3, K3, in[5], 7); |
119 | ROUND(dd, ee, aa, bb, cc, F3, K3, in[12], 5); |
120 | |
121 | /* round 4: left lane" */ |
122 | ROUND(cc, dd, ee, aa, bb, F4, K4, in[1], 11); |
123 | ROUND(bb, cc, dd, ee, aa, F4, K4, in[9], 12); |
124 | ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14); |
125 | ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15); |
126 | ROUND(dd, ee, aa, bb, cc, F4, K4, in[0], 14); |
127 | ROUND(cc, dd, ee, aa, bb, F4, K4, in[8], 15); |
128 | ROUND(bb, cc, dd, ee, aa, F4, K4, in[12], 9); |
129 | ROUND(aa, bb, cc, dd, ee, F4, K4, in[4], 8); |
130 | ROUND(ee, aa, bb, cc, dd, F4, K4, in[13], 9); |
131 | ROUND(dd, ee, aa, bb, cc, F4, K4, in[3], 14); |
132 | ROUND(cc, dd, ee, aa, bb, F4, K4, in[7], 5); |
133 | ROUND(bb, cc, dd, ee, aa, F4, K4, in[15], 6); |
134 | ROUND(aa, bb, cc, dd, ee, F4, K4, in[14], 8); |
135 | ROUND(ee, aa, bb, cc, dd, F4, K4, in[5], 6); |
136 | ROUND(dd, ee, aa, bb, cc, F4, K4, in[6], 5); |
137 | ROUND(cc, dd, ee, aa, bb, F4, K4, in[2], 12); |
138 | |
139 | /* round 5: left lane" */ |
140 | ROUND(bb, cc, dd, ee, aa, F5, K5, in[4], 9); |
141 | ROUND(aa, bb, cc, dd, ee, F5, K5, in[0], 15); |
142 | ROUND(ee, aa, bb, cc, dd, F5, K5, in[5], 5); |
143 | ROUND(dd, ee, aa, bb, cc, F5, K5, in[9], 11); |
144 | ROUND(cc, dd, ee, aa, bb, F5, K5, in[7], 6); |
145 | ROUND(bb, cc, dd, ee, aa, F5, K5, in[12], 8); |
146 | ROUND(aa, bb, cc, dd, ee, F5, K5, in[2], 13); |
147 | ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12); |
148 | ROUND(dd, ee, aa, bb, cc, F5, K5, in[14], 5); |
149 | ROUND(cc, dd, ee, aa, bb, F5, K5, in[1], 12); |
150 | ROUND(bb, cc, dd, ee, aa, F5, K5, in[3], 13); |
151 | ROUND(aa, bb, cc, dd, ee, F5, K5, in[8], 14); |
152 | ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11); |
153 | ROUND(dd, ee, aa, bb, cc, F5, K5, in[6], 8); |
154 | ROUND(cc, dd, ee, aa, bb, F5, K5, in[15], 5); |
155 | ROUND(bb, cc, dd, ee, aa, F5, K5, in[13], 6); |
156 | |
157 | /* round 1: right lane */ |
158 | ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5], 8); |
159 | ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14], 9); |
160 | ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7], 9); |
161 | ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0], 11); |
162 | ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9], 13); |
163 | ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2], 15); |
164 | ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15); |
165 | ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4], 5); |
166 | ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13], 7); |
167 | ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6], 7); |
168 | ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15], 8); |
169 | ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8], 11); |
170 | ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1], 14); |
171 | ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14); |
172 | ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3], 12); |
173 | ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12], 6); |
174 | |
175 | /* round 2: right lane */ |
176 | ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6], 9); |
177 | ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13); |
178 | ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3], 15); |
179 | ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7], 7); |
180 | ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0], 12); |
181 | ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13], 8); |
182 | ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5], 9); |
183 | ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11); |
184 | ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14], 7); |
185 | ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15], 7); |
186 | ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8], 12); |
187 | ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12], 7); |
188 | ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4], 6); |
189 | ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9], 15); |
190 | ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1], 13); |
191 | ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2], 11); |
192 | |
193 | /* round 3: right lane */ |
194 | ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15], 9); |
195 | ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5], 7); |
196 | ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1], 15); |
197 | ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3], 11); |
198 | ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7], 8); |
199 | ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14], 6); |
200 | ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6], 6); |
201 | ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9], 14); |
202 | ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12); |
203 | ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8], 13); |
204 | ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12], 5); |
205 | ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2], 14); |
206 | ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13); |
207 | ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0], 13); |
208 | ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4], 7); |
209 | ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13], 5); |
210 | |
211 | /* round 4: right lane */ |
212 | ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8], 15); |
213 | ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6], 5); |
214 | ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4], 8); |
215 | ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1], 11); |
216 | ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3], 14); |
217 | ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14); |
218 | ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15], 6); |
219 | ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0], 14); |
220 | ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5], 6); |
221 | ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12], 9); |
222 | ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2], 12); |
223 | ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13], 9); |
224 | ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9], 12); |
225 | ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7], 5); |
226 | ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15); |
227 | ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14], 8); |
228 | |
229 | /* round 5: right lane */ |
230 | ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12], 8); |
231 | ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15], 5); |
232 | ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12); |
233 | ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4], 9); |
234 | ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1], 12); |
235 | ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5], 5); |
236 | ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8], 14); |
237 | ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7], 6); |
238 | ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6], 8); |
239 | ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2], 13); |
240 | ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13], 6); |
241 | ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14], 5); |
242 | ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0], 15); |
243 | ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3], 13); |
244 | ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9], 11); |
245 | ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11); |
246 | |
247 | /* combine results */ |
248 | ddd += cc + state[1]; /* final result for state[0] */ |
249 | state[1] = state[2] + dd + eee; |
250 | state[2] = state[3] + ee + aaa; |
251 | state[3] = state[4] + aa + bbb; |
252 | state[4] = state[0] + bb + ccc; |
253 | state[0] = ddd; |
254 | } |
255 | |
256 | static int rmd160_init(struct shash_desc *desc) |
257 | { |
258 | struct rmd160_ctx *rctx = shash_desc_ctx(desc); |
259 | |
260 | rctx->byte_count = 0; |
261 | |
262 | rctx->state[0] = RMD_H0; |
263 | rctx->state[1] = RMD_H1; |
264 | rctx->state[2] = RMD_H2; |
265 | rctx->state[3] = RMD_H3; |
266 | rctx->state[4] = RMD_H4; |
267 | |
268 | memset(rctx->buffer, 0, sizeof(rctx->buffer)); |
269 | |
270 | return 0; |
271 | } |
272 | |
273 | static int rmd160_update(struct shash_desc *desc, const u8 *data, |
274 | unsigned int len) |
275 | { |
276 | struct rmd160_ctx *rctx = shash_desc_ctx(desc); |
277 | const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); |
278 | |
279 | rctx->byte_count += len; |
280 | |
281 | /* Enough space in buffer? If so copy and we're done */ |
282 | if (avail > len) { |
283 | memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), |
284 | data, len); |
285 | goto out; |
286 | } |
287 | |
288 | memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), |
289 | data, avail); |
290 | |
291 | rmd160_transform(state: rctx->state, in: rctx->buffer); |
292 | data += avail; |
293 | len -= avail; |
294 | |
295 | while (len >= sizeof(rctx->buffer)) { |
296 | memcpy(rctx->buffer, data, sizeof(rctx->buffer)); |
297 | rmd160_transform(state: rctx->state, in: rctx->buffer); |
298 | data += sizeof(rctx->buffer); |
299 | len -= sizeof(rctx->buffer); |
300 | } |
301 | |
302 | memcpy(rctx->buffer, data, len); |
303 | |
304 | out: |
305 | return 0; |
306 | } |
307 | |
308 | /* Add padding and return the message digest. */ |
309 | static int rmd160_final(struct shash_desc *desc, u8 *out) |
310 | { |
311 | struct rmd160_ctx *rctx = shash_desc_ctx(desc); |
312 | u32 i, index, padlen; |
313 | __le64 bits; |
314 | __le32 *dst = (__le32 *)out; |
315 | static const u8 padding[64] = { 0x80, }; |
316 | |
317 | bits = cpu_to_le64(rctx->byte_count << 3); |
318 | |
319 | /* Pad out to 56 mod 64 */ |
320 | index = rctx->byte_count & 0x3f; |
321 | padlen = (index < 56) ? (56 - index) : ((64+56) - index); |
322 | rmd160_update(desc, data: padding, len: padlen); |
323 | |
324 | /* Append length */ |
325 | rmd160_update(desc, data: (const u8 *)&bits, len: sizeof(bits)); |
326 | |
327 | /* Store state in digest */ |
328 | for (i = 0; i < 5; i++) |
329 | dst[i] = cpu_to_le32p(p: &rctx->state[i]); |
330 | |
331 | /* Wipe context */ |
332 | memset(rctx, 0, sizeof(*rctx)); |
333 | |
334 | return 0; |
335 | } |
336 | |
337 | static struct shash_alg alg = { |
338 | .digestsize = RMD160_DIGEST_SIZE, |
339 | .init = rmd160_init, |
340 | .update = rmd160_update, |
341 | .final = rmd160_final, |
342 | .descsize = sizeof(struct rmd160_ctx), |
343 | .base = { |
344 | .cra_name = "rmd160" , |
345 | .cra_driver_name = "rmd160-generic" , |
346 | .cra_blocksize = RMD160_BLOCK_SIZE, |
347 | .cra_module = THIS_MODULE, |
348 | } |
349 | }; |
350 | |
351 | static int __init rmd160_mod_init(void) |
352 | { |
353 | return crypto_register_shash(alg: &alg); |
354 | } |
355 | |
356 | static void __exit rmd160_mod_fini(void) |
357 | { |
358 | crypto_unregister_shash(alg: &alg); |
359 | } |
360 | |
361 | subsys_initcall(rmd160_mod_init); |
362 | module_exit(rmd160_mod_fini); |
363 | |
364 | MODULE_LICENSE("GPL" ); |
365 | MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>" ); |
366 | MODULE_DESCRIPTION("RIPEMD-160 Message Digest" ); |
367 | MODULE_ALIAS_CRYPTO("rmd160" ); |
368 | |