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/kernel.h>
13#include <linux/module.h>
14#include <linux/string.h>
15#include "ripemd.h"
16
17struct rmd160_ctx {
18 u64 byte_count;
19 u32 state[5];
20};
21
22#define K1 RMD_K1
23#define K2 RMD_K2
24#define K3 RMD_K3
25#define K4 RMD_K4
26#define K5 RMD_K5
27#define KK1 RMD_K6
28#define KK2 RMD_K7
29#define KK3 RMD_K8
30#define KK4 RMD_K9
31#define KK5 RMD_K1
32
33#define F1(x, y, z) (x ^ y ^ z) /* XOR */
34#define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
35#define F3(x, y, z) ((x | ~y) ^ z)
36#define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
37#define F5(x, y, z) (x ^ (y | ~z))
38
39#define ROUND(a, b, c, d, e, f, k, x, s) { \
40 (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
41 (a) = rol32((a), (s)) + (e); \
42 (c) = rol32((c), 10); \
43}
44
45static void rmd160_transform(u32 *state, const __le32 *in)
46{
47 u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee;
48
49 /* Initialize left lane */
50 aa = state[0];
51 bb = state[1];
52 cc = state[2];
53 dd = state[3];
54 ee = state[4];
55
56 /* Initialize right lane */
57 aaa = state[0];
58 bbb = state[1];
59 ccc = state[2];
60 ddd = state[3];
61 eee = state[4];
62
63 /* round 1: left lane */
64 ROUND(aa, bb, cc, dd, ee, F1, K1, in[0], 11);
65 ROUND(ee, aa, bb, cc, dd, F1, K1, in[1], 14);
66 ROUND(dd, ee, aa, bb, cc, F1, K1, in[2], 15);
67 ROUND(cc, dd, ee, aa, bb, F1, K1, in[3], 12);
68 ROUND(bb, cc, dd, ee, aa, F1, K1, in[4], 5);
69 ROUND(aa, bb, cc, dd, ee, F1, K1, in[5], 8);
70 ROUND(ee, aa, bb, cc, dd, F1, K1, in[6], 7);
71 ROUND(dd, ee, aa, bb, cc, F1, K1, in[7], 9);
72 ROUND(cc, dd, ee, aa, bb, F1, K1, in[8], 11);
73 ROUND(bb, cc, dd, ee, aa, F1, K1, in[9], 13);
74 ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14);
75 ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15);
76 ROUND(dd, ee, aa, bb, cc, F1, K1, in[12], 6);
77 ROUND(cc, dd, ee, aa, bb, F1, K1, in[13], 7);
78 ROUND(bb, cc, dd, ee, aa, F1, K1, in[14], 9);
79 ROUND(aa, bb, cc, dd, ee, F1, K1, in[15], 8);
80
81 /* round 2: left lane" */
82 ROUND(ee, aa, bb, cc, dd, F2, K2, in[7], 7);
83 ROUND(dd, ee, aa, bb, cc, F2, K2, in[4], 6);
84 ROUND(cc, dd, ee, aa, bb, F2, K2, in[13], 8);
85 ROUND(bb, cc, dd, ee, aa, F2, K2, in[1], 13);
86 ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
87 ROUND(ee, aa, bb, cc, dd, F2, K2, in[6], 9);
88 ROUND(dd, ee, aa, bb, cc, F2, K2, in[15], 7);
89 ROUND(cc, dd, ee, aa, bb, F2, K2, in[3], 15);
90 ROUND(bb, cc, dd, ee, aa, F2, K2, in[12], 7);
91 ROUND(aa, bb, cc, dd, ee, F2, K2, in[0], 12);
92 ROUND(ee, aa, bb, cc, dd, F2, K2, in[9], 15);
93 ROUND(dd, ee, aa, bb, cc, F2, K2, in[5], 9);
94 ROUND(cc, dd, ee, aa, bb, F2, K2, in[2], 11);
95 ROUND(bb, cc, dd, ee, aa, F2, K2, in[14], 7);
96 ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
97 ROUND(ee, aa, bb, cc, dd, F2, K2, in[8], 12);
98
99 /* round 3: left lane" */
100 ROUND(dd, ee, aa, bb, cc, F3, K3, in[3], 11);
101 ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
102 ROUND(bb, cc, dd, ee, aa, F3, K3, in[14], 6);
103 ROUND(aa, bb, cc, dd, ee, F3, K3, in[4], 7);
104 ROUND(ee, aa, bb, cc, dd, F3, K3, in[9], 14);
105 ROUND(dd, ee, aa, bb, cc, F3, K3, in[15], 9);
106 ROUND(cc, dd, ee, aa, bb, F3, K3, in[8], 13);
107 ROUND(bb, cc, dd, ee, aa, F3, K3, in[1], 15);
108 ROUND(aa, bb, cc, dd, ee, F3, K3, in[2], 14);
109 ROUND(ee, aa, bb, cc, dd, F3, K3, in[7], 8);
110 ROUND(dd, ee, aa, bb, cc, F3, K3, in[0], 13);
111 ROUND(cc, dd, ee, aa, bb, F3, K3, in[6], 6);
112 ROUND(bb, cc, dd, ee, aa, F3, K3, in[13], 5);
113 ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
114 ROUND(ee, aa, bb, cc, dd, F3, K3, in[5], 7);
115 ROUND(dd, ee, aa, bb, cc, F3, K3, in[12], 5);
116
117 /* round 4: left lane" */
118 ROUND(cc, dd, ee, aa, bb, F4, K4, in[1], 11);
119 ROUND(bb, cc, dd, ee, aa, F4, K4, in[9], 12);
120 ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
121 ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
122 ROUND(dd, ee, aa, bb, cc, F4, K4, in[0], 14);
123 ROUND(cc, dd, ee, aa, bb, F4, K4, in[8], 15);
124 ROUND(bb, cc, dd, ee, aa, F4, K4, in[12], 9);
125 ROUND(aa, bb, cc, dd, ee, F4, K4, in[4], 8);
126 ROUND(ee, aa, bb, cc, dd, F4, K4, in[13], 9);
127 ROUND(dd, ee, aa, bb, cc, F4, K4, in[3], 14);
128 ROUND(cc, dd, ee, aa, bb, F4, K4, in[7], 5);
129 ROUND(bb, cc, dd, ee, aa, F4, K4, in[15], 6);
130 ROUND(aa, bb, cc, dd, ee, F4, K4, in[14], 8);
131 ROUND(ee, aa, bb, cc, dd, F4, K4, in[5], 6);
132 ROUND(dd, ee, aa, bb, cc, F4, K4, in[6], 5);
133 ROUND(cc, dd, ee, aa, bb, F4, K4, in[2], 12);
134
135 /* round 5: left lane" */
136 ROUND(bb, cc, dd, ee, aa, F5, K5, in[4], 9);
137 ROUND(aa, bb, cc, dd, ee, F5, K5, in[0], 15);
138 ROUND(ee, aa, bb, cc, dd, F5, K5, in[5], 5);
139 ROUND(dd, ee, aa, bb, cc, F5, K5, in[9], 11);
140 ROUND(cc, dd, ee, aa, bb, F5, K5, in[7], 6);
141 ROUND(bb, cc, dd, ee, aa, F5, K5, in[12], 8);
142 ROUND(aa, bb, cc, dd, ee, F5, K5, in[2], 13);
143 ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
144 ROUND(dd, ee, aa, bb, cc, F5, K5, in[14], 5);
145 ROUND(cc, dd, ee, aa, bb, F5, K5, in[1], 12);
146 ROUND(bb, cc, dd, ee, aa, F5, K5, in[3], 13);
147 ROUND(aa, bb, cc, dd, ee, F5, K5, in[8], 14);
148 ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
149 ROUND(dd, ee, aa, bb, cc, F5, K5, in[6], 8);
150 ROUND(cc, dd, ee, aa, bb, F5, K5, in[15], 5);
151 ROUND(bb, cc, dd, ee, aa, F5, K5, in[13], 6);
152
153 /* round 1: right lane */
154 ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5], 8);
155 ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14], 9);
156 ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7], 9);
157 ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0], 11);
158 ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9], 13);
159 ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2], 15);
160 ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
161 ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4], 5);
162 ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13], 7);
163 ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6], 7);
164 ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15], 8);
165 ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8], 11);
166 ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1], 14);
167 ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
168 ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3], 12);
169 ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12], 6);
170
171 /* round 2: right lane */
172 ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6], 9);
173 ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
174 ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3], 15);
175 ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7], 7);
176 ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0], 12);
177 ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13], 8);
178 ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5], 9);
179 ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
180 ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14], 7);
181 ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15], 7);
182 ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8], 12);
183 ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12], 7);
184 ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4], 6);
185 ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9], 15);
186 ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1], 13);
187 ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2], 11);
188
189 /* round 3: right lane */
190 ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15], 9);
191 ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5], 7);
192 ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1], 15);
193 ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3], 11);
194 ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7], 8);
195 ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14], 6);
196 ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6], 6);
197 ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9], 14);
198 ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
199 ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8], 13);
200 ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12], 5);
201 ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2], 14);
202 ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
203 ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0], 13);
204 ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4], 7);
205 ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13], 5);
206
207 /* round 4: right lane */
208 ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8], 15);
209 ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6], 5);
210 ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4], 8);
211 ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1], 11);
212 ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3], 14);
213 ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14);
214 ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15], 6);
215 ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0], 14);
216 ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5], 6);
217 ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12], 9);
218 ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2], 12);
219 ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13], 9);
220 ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9], 12);
221 ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7], 5);
222 ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15);
223 ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14], 8);
224
225 /* round 5: right lane */
226 ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12], 8);
227 ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15], 5);
228 ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
229 ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4], 9);
230 ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1], 12);
231 ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5], 5);
232 ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8], 14);
233 ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7], 6);
234 ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6], 8);
235 ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2], 13);
236 ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13], 6);
237 ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14], 5);
238 ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0], 15);
239 ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3], 13);
240 ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9], 11);
241 ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
242
243 /* combine results */
244 ddd += cc + state[1]; /* final result for state[0] */
245 state[1] = state[2] + dd + eee;
246 state[2] = state[3] + ee + aaa;
247 state[3] = state[4] + aa + bbb;
248 state[4] = state[0] + bb + ccc;
249 state[0] = ddd;
250}
251
252static int rmd160_init(struct shash_desc *desc)
253{
254 struct rmd160_ctx *rctx = shash_desc_ctx(desc);
255
256 rctx->byte_count = 0;
257
258 rctx->state[0] = RMD_H0;
259 rctx->state[1] = RMD_H1;
260 rctx->state[2] = RMD_H2;
261 rctx->state[3] = RMD_H3;
262 rctx->state[4] = RMD_H4;
263
264 return 0;
265}
266
267static int rmd160_update(struct shash_desc *desc, const u8 *data,
268 unsigned int len)
269{
270 int remain = len - round_down(len, RMD160_BLOCK_SIZE);
271 struct rmd160_ctx *rctx = shash_desc_ctx(desc);
272 __le32 buffer[RMD160_BLOCK_SIZE / 4];
273
274 rctx->byte_count += len - remain;
275
276 do {
277 memcpy(buffer, data, sizeof(buffer));
278 rmd160_transform(state: rctx->state, in: buffer);
279 data += sizeof(buffer);
280 len -= sizeof(buffer);
281 } while (len >= sizeof(buffer));
282
283 memzero_explicit(s: buffer, count: sizeof(buffer));
284 return remain;
285}
286
287/* Add padding and return the message digest. */
288static int rmd160_finup(struct shash_desc *desc, const u8 *src,
289 unsigned int len, u8 *out)
290{
291 unsigned int bit_offset = RMD160_BLOCK_SIZE / 8 - 1;
292 struct rmd160_ctx *rctx = shash_desc_ctx(desc);
293 union {
294 __le64 l64[RMD160_BLOCK_SIZE / 4];
295 __le32 l32[RMD160_BLOCK_SIZE / 2];
296 u8 u8[RMD160_BLOCK_SIZE * 2];
297 } block = {};
298 __le32 *dst = (__le32 *)out;
299 u32 i;
300
301 rctx->byte_count += len;
302 if (len >= bit_offset * 8)
303 bit_offset += RMD160_BLOCK_SIZE / 8;
304 memcpy(&block, src, len);
305 block.u8[len] = 0x80;
306 block.l64[bit_offset] = cpu_to_le64(rctx->byte_count << 3);
307
308 rmd160_transform(state: rctx->state, in: block.l32);
309 if (bit_offset > RMD160_BLOCK_SIZE / 8)
310 rmd160_transform(state: rctx->state,
311 in: block.l32 + RMD160_BLOCK_SIZE / 4);
312 memzero_explicit(s: &block, count: sizeof(block));
313
314 /* Store state in digest */
315 for (i = 0; i < 5; i++)
316 dst[i] = cpu_to_le32p(p: &rctx->state[i]);
317 return 0;
318}
319
320static struct shash_alg alg = {
321 .digestsize = RMD160_DIGEST_SIZE,
322 .init = rmd160_init,
323 .update = rmd160_update,
324 .finup = rmd160_finup,
325 .descsize = sizeof(struct rmd160_ctx),
326 .base = {
327 .cra_name = "rmd160",
328 .cra_driver_name = "rmd160-generic",
329 .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
330 .cra_blocksize = RMD160_BLOCK_SIZE,
331 .cra_module = THIS_MODULE,
332 }
333};
334
335static int __init rmd160_mod_init(void)
336{
337 return crypto_register_shash(alg: &alg);
338}
339
340static void __exit rmd160_mod_fini(void)
341{
342 crypto_unregister_shash(alg: &alg);
343}
344
345module_init(rmd160_mod_init);
346module_exit(rmd160_mod_fini);
347
348MODULE_LICENSE("GPL");
349MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
350MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
351MODULE_ALIAS_CRYPTO("rmd160");
352

source code of linux/crypto/rmd160.c