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(rctx->state, 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(rctx->state, 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, padding, padlen);
323
324 /* Append length */
325 rmd160_update(desc, (const u8 *)&bits, sizeof(bits));
326
327 /* Store state in digest */
328 for (i = 0; i < 5; i++)
329 dst[i] = cpu_to_le32p(&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);
354 }
355
356 static void __exit rmd160_mod_fini(void)
357 {
358 crypto_unregister_shash(&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
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