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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Cryptographic API.
4 *
5 * RIPEMD-256 - 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
20struct rmd256_ctx {
21 u64 byte_count;
22 u32 state[8];
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 KK1 RMD_K6
31#define KK2 RMD_K7
32#define KK3 RMD_K8
33#define KK4 RMD_K1
34
35#define F1(x, y, z) (x ^ y ^ z) /* XOR */
36#define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
37#define F3(x, y, z) ((x | ~y) ^ z)
38#define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
39
40#define ROUND(a, b, c, d, f, k, x, s) { \
41 (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
42 (a) = rol32((a), (s)); \
43}
44
45static void rmd256_transform(u32 *state, const __le32 *in)
46{
47 u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd;
48
49 /* Initialize left lane */
50 aa = state[0];
51 bb = state[1];
52 cc = state[2];
53 dd = state[3];
54
55 /* Initialize right lane */
56 aaa = state[4];
57 bbb = state[5];
58 ccc = state[6];
59 ddd = state[7];
60
61 /* round 1: left lane */
62 ROUND(aa, bb, cc, dd, F1, K1, in[0], 11);
63 ROUND(dd, aa, bb, cc, F1, K1, in[1], 14);
64 ROUND(cc, dd, aa, bb, F1, K1, in[2], 15);
65 ROUND(bb, cc, dd, aa, F1, K1, in[3], 12);
66 ROUND(aa, bb, cc, dd, F1, K1, in[4], 5);
67 ROUND(dd, aa, bb, cc, F1, K1, in[5], 8);
68 ROUND(cc, dd, aa, bb, F1, K1, in[6], 7);
69 ROUND(bb, cc, dd, aa, F1, K1, in[7], 9);
70 ROUND(aa, bb, cc, dd, F1, K1, in[8], 11);
71 ROUND(dd, aa, bb, cc, F1, K1, in[9], 13);
72 ROUND(cc, dd, aa, bb, F1, K1, in[10], 14);
73 ROUND(bb, cc, dd, aa, F1, K1, in[11], 15);
74 ROUND(aa, bb, cc, dd, F1, K1, in[12], 6);
75 ROUND(dd, aa, bb, cc, F1, K1, in[13], 7);
76 ROUND(cc, dd, aa, bb, F1, K1, in[14], 9);
77 ROUND(bb, cc, dd, aa, F1, K1, in[15], 8);
78
79 /* round 1: right lane */
80 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8);
81 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9);
82 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9);
83 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11);
84 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13);
85 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15);
86 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15);
87 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5);
88 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7);
89 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7);
90 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8);
91 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11);
92 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14);
93 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14);
94 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12);
95 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6);
96
97 /* Swap contents of "a" registers */
98 swap(aa, aaa);
99
100 /* round 2: left lane */
101 ROUND(aa, bb, cc, dd, F2, K2, in[7], 7);
102 ROUND(dd, aa, bb, cc, F2, K2, in[4], 6);
103 ROUND(cc, dd, aa, bb, F2, K2, in[13], 8);
104 ROUND(bb, cc, dd, aa, F2, K2, in[1], 13);
105 ROUND(aa, bb, cc, dd, F2, K2, in[10], 11);
106 ROUND(dd, aa, bb, cc, F2, K2, in[6], 9);
107 ROUND(cc, dd, aa, bb, F2, K2, in[15], 7);
108 ROUND(bb, cc, dd, aa, F2, K2, in[3], 15);
109 ROUND(aa, bb, cc, dd, F2, K2, in[12], 7);
110 ROUND(dd, aa, bb, cc, F2, K2, in[0], 12);
111 ROUND(cc, dd, aa, bb, F2, K2, in[9], 15);
112 ROUND(bb, cc, dd, aa, F2, K2, in[5], 9);
113 ROUND(aa, bb, cc, dd, F2, K2, in[2], 11);
114 ROUND(dd, aa, bb, cc, F2, K2, in[14], 7);
115 ROUND(cc, dd, aa, bb, F2, K2, in[11], 13);
116 ROUND(bb, cc, dd, aa, F2, K2, in[8], 12);
117
118 /* round 2: right lane */
119 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9);
120 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13);
121 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15);
122 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7);
123 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12);
124 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8);
125 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9);
126 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11);
127 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7);
128 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7);
129 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12);
130 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7);
131 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6);
132 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15);
133 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13);
134 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11);
135
136 /* Swap contents of "b" registers */
137 swap(bb, bbb);
138
139 /* round 3: left lane */
140 ROUND(aa, bb, cc, dd, F3, K3, in[3], 11);
141 ROUND(dd, aa, bb, cc, F3, K3, in[10], 13);
142 ROUND(cc, dd, aa, bb, F3, K3, in[14], 6);
143 ROUND(bb, cc, dd, aa, F3, K3, in[4], 7);
144 ROUND(aa, bb, cc, dd, F3, K3, in[9], 14);
145 ROUND(dd, aa, bb, cc, F3, K3, in[15], 9);
146 ROUND(cc, dd, aa, bb, F3, K3, in[8], 13);
147 ROUND(bb, cc, dd, aa, F3, K3, in[1], 15);
148 ROUND(aa, bb, cc, dd, F3, K3, in[2], 14);
149 ROUND(dd, aa, bb, cc, F3, K3, in[7], 8);
150 ROUND(cc, dd, aa, bb, F3, K3, in[0], 13);
151 ROUND(bb, cc, dd, aa, F3, K3, in[6], 6);
152 ROUND(aa, bb, cc, dd, F3, K3, in[13], 5);
153 ROUND(dd, aa, bb, cc, F3, K3, in[11], 12);
154 ROUND(cc, dd, aa, bb, F3, K3, in[5], 7);
155 ROUND(bb, cc, dd, aa, F3, K3, in[12], 5);
156
157 /* round 3: right lane */
158 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9);
159 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7);
160 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15);
161 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11);
162 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8);
163 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6);
164 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6);
165 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14);
166 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12);
167 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13);
168 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5);
169 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14);
170 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13);
171 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13);
172 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7);
173 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5);
174
175 /* Swap contents of "c" registers */
176 swap(cc, ccc);
177
178 /* round 4: left lane */
179 ROUND(aa, bb, cc, dd, F4, K4, in[1], 11);
180 ROUND(dd, aa, bb, cc, F4, K4, in[9], 12);
181 ROUND(cc, dd, aa, bb, F4, K4, in[11], 14);
182 ROUND(bb, cc, dd, aa, F4, K4, in[10], 15);
183 ROUND(aa, bb, cc, dd, F4, K4, in[0], 14);
184 ROUND(dd, aa, bb, cc, F4, K4, in[8], 15);
185 ROUND(cc, dd, aa, bb, F4, K4, in[12], 9);
186 ROUND(bb, cc, dd, aa, F4, K4, in[4], 8);
187 ROUND(aa, bb, cc, dd, F4, K4, in[13], 9);
188 ROUND(dd, aa, bb, cc, F4, K4, in[3], 14);
189 ROUND(cc, dd, aa, bb, F4, K4, in[7], 5);
190 ROUND(bb, cc, dd, aa, F4, K4, in[15], 6);
191 ROUND(aa, bb, cc, dd, F4, K4, in[14], 8);
192 ROUND(dd, aa, bb, cc, F4, K4, in[5], 6);
193 ROUND(cc, dd, aa, bb, F4, K4, in[6], 5);
194 ROUND(bb, cc, dd, aa, F4, K4, in[2], 12);
195
196 /* round 4: right lane */
197 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15);
198 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5);
199 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8);
200 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11);
201 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14);
202 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14);
203 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6);
204 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14);
205 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6);
206 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9);
207 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12);
208 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9);
209 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12);
210 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5);
211 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15);
212 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8);
213
214 /* Swap contents of "d" registers */
215 swap(dd, ddd);
216
217 /* combine results */
218 state[0] += aa;
219 state[1] += bb;
220 state[2] += cc;
221 state[3] += dd;
222 state[4] += aaa;
223 state[5] += bbb;
224 state[6] += ccc;
225 state[7] += ddd;
226}
227
228static int rmd256_init(struct shash_desc *desc)
229{
230 struct rmd256_ctx *rctx = shash_desc_ctx(desc);
231
232 rctx->byte_count = 0;
233
234 rctx->state[0] = RMD_H0;
235 rctx->state[1] = RMD_H1;
236 rctx->state[2] = RMD_H2;
237 rctx->state[3] = RMD_H3;
238 rctx->state[4] = RMD_H5;
239 rctx->state[5] = RMD_H6;
240 rctx->state[6] = RMD_H7;
241 rctx->state[7] = RMD_H8;
242
243 memset(rctx->buffer, 0, sizeof(rctx->buffer));
244
245 return 0;
246}
247
248static int rmd256_update(struct shash_desc *desc, const u8 *data,
249 unsigned int len)
250{
251 struct rmd256_ctx *rctx = shash_desc_ctx(desc);
252 const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
253
254 rctx->byte_count += len;
255
256 /* Enough space in buffer? If so copy and we're done */
257 if (avail > len) {
258 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
259 data, len);
260 goto out;
261 }
262
263 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
264 data, avail);
265
266 rmd256_transform(rctx->state, rctx->buffer);
267 data += avail;
268 len -= avail;
269
270 while (len >= sizeof(rctx->buffer)) {
271 memcpy(rctx->buffer, data, sizeof(rctx->buffer));
272 rmd256_transform(rctx->state, rctx->buffer);
273 data += sizeof(rctx->buffer);
274 len -= sizeof(rctx->buffer);
275 }
276
277 memcpy(rctx->buffer, data, len);
278
279out:
280 return 0;
281}
282
283/* Add padding and return the message digest. */
284static int rmd256_final(struct shash_desc *desc, u8 *out)
285{
286 struct rmd256_ctx *rctx = shash_desc_ctx(desc);
287 u32 i, index, padlen;
288 __le64 bits;
289 __le32 *dst = (__le32 *)out;
290 static const u8 padding[64] = { 0x80, };
291
292 bits = cpu_to_le64(rctx->byte_count << 3);
293
294 /* Pad out to 56 mod 64 */
295 index = rctx->byte_count & 0x3f;
296 padlen = (index < 56) ? (56 - index) : ((64+56) - index);
297 rmd256_update(desc, padding, padlen);
298
299 /* Append length */
300 rmd256_update(desc, (const u8 *)&bits, sizeof(bits));
301
302 /* Store state in digest */
303 for (i = 0; i < 8; i++)
304 dst[i] = cpu_to_le32p(&rctx->state[i]);
305
306 /* Wipe context */
307 memset(rctx, 0, sizeof(*rctx));
308
309 return 0;
310}
311
312static struct shash_alg alg = {
313 .digestsize = RMD256_DIGEST_SIZE,
314 .init = rmd256_init,
315 .update = rmd256_update,
316 .final = rmd256_final,
317 .descsize = sizeof(struct rmd256_ctx),
318 .base = {
319 .cra_name = "rmd256",
320 .cra_driver_name = "rmd256-generic",
321 .cra_blocksize = RMD256_BLOCK_SIZE,
322 .cra_module = THIS_MODULE,
323 }
324};
325
326static int __init rmd256_mod_init(void)
327{
328 return crypto_register_shash(&alg);
329}
330
331static void __exit rmd256_mod_fini(void)
332{
333 crypto_unregister_shash(&alg);
334}
335
336subsys_initcall(rmd256_mod_init);
337module_exit(rmd256_mod_fini);
338
339MODULE_LICENSE("GPL");
340MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
341MODULE_DESCRIPTION("RIPEMD-256 Message Digest");
342MODULE_ALIAS_CRYPTO("rmd256");
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 <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
25struct 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
50static 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
233static int rmd256_init(struct shash_desc *desc)
234{
235 struct rmd256_ctx *rctx = shash_desc_ctx(desc);
236
237 rctx->byte_count = 0;
238
239 rctx->state[0] = RMD_H0;
240 rctx->state[1] = RMD_H1;
241 rctx->state[2] = RMD_H2;
242 rctx->state[3] = RMD_H3;
243 rctx->state[4] = RMD_H5;
244 rctx->state[5] = RMD_H6;
245 rctx->state[6] = RMD_H7;
246 rctx->state[7] = RMD_H8;
247
248 memset(rctx->buffer, 0, sizeof(rctx->buffer));
249
250 return 0;
251}
252
253static int rmd256_update(struct shash_desc *desc, const u8 *data,
254 unsigned int len)
255{
256 struct rmd256_ctx *rctx = shash_desc_ctx(desc);
257 const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
258
259 rctx->byte_count += len;
260
261 /* Enough space in buffer? If so copy and we're done */
262 if (avail > len) {
263 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
264 data, len);
265 goto out;
266 }
267
268 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
269 data, avail);
270
271 rmd256_transform(rctx->state, rctx->buffer);
272 data += avail;
273 len -= avail;
274
275 while (len >= sizeof(rctx->buffer)) {
276 memcpy(rctx->buffer, data, sizeof(rctx->buffer));
277 rmd256_transform(rctx->state, rctx->buffer);
278 data += sizeof(rctx->buffer);
279 len -= sizeof(rctx->buffer);
280 }
281
282 memcpy(rctx->buffer, data, len);
283
284out:
285 return 0;
286}
287
288/* Add padding and return the message digest. */
289static int rmd256_final(struct shash_desc *desc, u8 *out)
290{
291 struct rmd256_ctx *rctx = shash_desc_ctx(desc);
292 u32 i, index, padlen;
293 __le64 bits;
294 __le32 *dst = (__le32 *)out;
295 static const u8 padding[64] = { 0x80, };
296
297 bits = cpu_to_le64(rctx->byte_count << 3);
298
299 /* Pad out to 56 mod 64 */
300 index = rctx->byte_count & 0x3f;
301 padlen = (index < 56) ? (56 - index) : ((64+56) - index);
302 rmd256_update(desc, padding, padlen);
303
304 /* Append length */
305 rmd256_update(desc, (const u8 *)&bits, sizeof(bits));
306
307 /* Store state in digest */
308 for (i = 0; i < 8; i++)
309 dst[i] = cpu_to_le32p(&rctx->state[i]);
310
311 /* Wipe context */
312 memset(rctx, 0, sizeof(*rctx));
313
314 return 0;
315}
316
317static struct shash_alg alg = {
318 .digestsize = RMD256_DIGEST_SIZE,
319 .init = rmd256_init,
320 .update = rmd256_update,
321 .final = rmd256_final,
322 .descsize = sizeof(struct rmd256_ctx),
323 .base = {
324 .cra_name = "rmd256",
325 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
326 .cra_blocksize = RMD256_BLOCK_SIZE,
327 .cra_module = THIS_MODULE,
328 }
329};
330
331static int __init rmd256_mod_init(void)
332{
333 return crypto_register_shash(&alg);
334}
335
336static void __exit rmd256_mod_fini(void)
337{
338 crypto_unregister_shash(&alg);
339}
340
341module_init(rmd256_mod_init);
342module_exit(rmd256_mod_fini);
343
344MODULE_LICENSE("GPL");
345MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
346MODULE_DESCRIPTION("RIPEMD-256 Message Digest");
347MODULE_ALIAS_CRYPTO("rmd256");