Root/crypto/rmd160.c

1/*
2 * Cryptographic API.
3 *
4 * RIPEMD-160 - 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 <rueegsegger (at) swiss-it.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 rmd160_ctx {
26    u64 byte_count;
27    u32 state[5];
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 K5 RMD_K5
36#define KK1 RMD_K6
37#define KK2 RMD_K7
38#define KK3 RMD_K8
39#define KK4 RMD_K9
40#define KK5 RMD_K1
41
42#define F1(x, y, z) (x ^ y ^ z) /* XOR */
43#define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
44#define F3(x, y, z) ((x | ~y) ^ z)
45#define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
46#define F5(x, y, z) (x ^ (y | ~z))
47
48#define ROUND(a, b, c, d, e, f, k, x, s) { \
49    (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
50    (a) = rol32((a), (s)) + (e); \
51    (c) = rol32((c), 10); \
52}
53
54static void rmd160_transform(u32 *state, const __le32 *in)
55{
56    u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee;
57
58    /* Initialize left lane */
59    aa = state[0];
60    bb = state[1];
61    cc = state[2];
62    dd = state[3];
63    ee = state[4];
64
65    /* Initialize right lane */
66    aaa = state[0];
67    bbb = state[1];
68    ccc = state[2];
69    ddd = state[3];
70    eee = state[4];
71
72    /* round 1: left lane */
73    ROUND(aa, bb, cc, dd, ee, F1, K1, in[0], 11);
74    ROUND(ee, aa, bb, cc, dd, F1, K1, in[1], 14);
75    ROUND(dd, ee, aa, bb, cc, F1, K1, in[2], 15);
76    ROUND(cc, dd, ee, aa, bb, F1, K1, in[3], 12);
77    ROUND(bb, cc, dd, ee, aa, F1, K1, in[4], 5);
78    ROUND(aa, bb, cc, dd, ee, F1, K1, in[5], 8);
79    ROUND(ee, aa, bb, cc, dd, F1, K1, in[6], 7);
80    ROUND(dd, ee, aa, bb, cc, F1, K1, in[7], 9);
81    ROUND(cc, dd, ee, aa, bb, F1, K1, in[8], 11);
82    ROUND(bb, cc, dd, ee, aa, F1, K1, in[9], 13);
83    ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14);
84    ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15);
85    ROUND(dd, ee, aa, bb, cc, F1, K1, in[12], 6);
86    ROUND(cc, dd, ee, aa, bb, F1, K1, in[13], 7);
87    ROUND(bb, cc, dd, ee, aa, F1, K1, in[14], 9);
88    ROUND(aa, bb, cc, dd, ee, F1, K1, in[15], 8);
89
90    /* round 2: left lane" */
91    ROUND(ee, aa, bb, cc, dd, F2, K2, in[7], 7);
92    ROUND(dd, ee, aa, bb, cc, F2, K2, in[4], 6);
93    ROUND(cc, dd, ee, aa, bb, F2, K2, in[13], 8);
94    ROUND(bb, cc, dd, ee, aa, F2, K2, in[1], 13);
95    ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
96    ROUND(ee, aa, bb, cc, dd, F2, K2, in[6], 9);
97    ROUND(dd, ee, aa, bb, cc, F2, K2, in[15], 7);
98    ROUND(cc, dd, ee, aa, bb, F2, K2, in[3], 15);
99    ROUND(bb, cc, dd, ee, aa, F2, K2, in[12], 7);
100    ROUND(aa, bb, cc, dd, ee, F2, K2, in[0], 12);
101    ROUND(ee, aa, bb, cc, dd, F2, K2, in[9], 15);
102    ROUND(dd, ee, aa, bb, cc, F2, K2, in[5], 9);
103    ROUND(cc, dd, ee, aa, bb, F2, K2, in[2], 11);
104    ROUND(bb, cc, dd, ee, aa, F2, K2, in[14], 7);
105    ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
106    ROUND(ee, aa, bb, cc, dd, F2, K2, in[8], 12);
107
108    /* round 3: left lane" */
109    ROUND(dd, ee, aa, bb, cc, F3, K3, in[3], 11);
110    ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
111    ROUND(bb, cc, dd, ee, aa, F3, K3, in[14], 6);
112    ROUND(aa, bb, cc, dd, ee, F3, K3, in[4], 7);
113    ROUND(ee, aa, bb, cc, dd, F3, K3, in[9], 14);
114    ROUND(dd, ee, aa, bb, cc, F3, K3, in[15], 9);
115    ROUND(cc, dd, ee, aa, bb, F3, K3, in[8], 13);
116    ROUND(bb, cc, dd, ee, aa, F3, K3, in[1], 15);
117    ROUND(aa, bb, cc, dd, ee, F3, K3, in[2], 14);
118    ROUND(ee, aa, bb, cc, dd, F3, K3, in[7], 8);
119    ROUND(dd, ee, aa, bb, cc, F3, K3, in[0], 13);
120    ROUND(cc, dd, ee, aa, bb, F3, K3, in[6], 6);
121    ROUND(bb, cc, dd, ee, aa, F3, K3, in[13], 5);
122    ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
123    ROUND(ee, aa, bb, cc, dd, F3, K3, in[5], 7);
124    ROUND(dd, ee, aa, bb, cc, F3, K3, in[12], 5);
125
126    /* round 4: left lane" */
127    ROUND(cc, dd, ee, aa, bb, F4, K4, in[1], 11);
128    ROUND(bb, cc, dd, ee, aa, F4, K4, in[9], 12);
129    ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
130    ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
131    ROUND(dd, ee, aa, bb, cc, F4, K4, in[0], 14);
132    ROUND(cc, dd, ee, aa, bb, F4, K4, in[8], 15);
133    ROUND(bb, cc, dd, ee, aa, F4, K4, in[12], 9);
134    ROUND(aa, bb, cc, dd, ee, F4, K4, in[4], 8);
135    ROUND(ee, aa, bb, cc, dd, F4, K4, in[13], 9);
136    ROUND(dd, ee, aa, bb, cc, F4, K4, in[3], 14);
137    ROUND(cc, dd, ee, aa, bb, F4, K4, in[7], 5);
138    ROUND(bb, cc, dd, ee, aa, F4, K4, in[15], 6);
139    ROUND(aa, bb, cc, dd, ee, F4, K4, in[14], 8);
140    ROUND(ee, aa, bb, cc, dd, F4, K4, in[5], 6);
141    ROUND(dd, ee, aa, bb, cc, F4, K4, in[6], 5);
142    ROUND(cc, dd, ee, aa, bb, F4, K4, in[2], 12);
143
144    /* round 5: left lane" */
145    ROUND(bb, cc, dd, ee, aa, F5, K5, in[4], 9);
146    ROUND(aa, bb, cc, dd, ee, F5, K5, in[0], 15);
147    ROUND(ee, aa, bb, cc, dd, F5, K5, in[5], 5);
148    ROUND(dd, ee, aa, bb, cc, F5, K5, in[9], 11);
149    ROUND(cc, dd, ee, aa, bb, F5, K5, in[7], 6);
150    ROUND(bb, cc, dd, ee, aa, F5, K5, in[12], 8);
151    ROUND(aa, bb, cc, dd, ee, F5, K5, in[2], 13);
152    ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
153    ROUND(dd, ee, aa, bb, cc, F5, K5, in[14], 5);
154    ROUND(cc, dd, ee, aa, bb, F5, K5, in[1], 12);
155    ROUND(bb, cc, dd, ee, aa, F5, K5, in[3], 13);
156    ROUND(aa, bb, cc, dd, ee, F5, K5, in[8], 14);
157    ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
158    ROUND(dd, ee, aa, bb, cc, F5, K5, in[6], 8);
159    ROUND(cc, dd, ee, aa, bb, F5, K5, in[15], 5);
160    ROUND(bb, cc, dd, ee, aa, F5, K5, in[13], 6);
161
162    /* round 1: right lane */
163    ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5], 8);
164    ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14], 9);
165    ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7], 9);
166    ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0], 11);
167    ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9], 13);
168    ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2], 15);
169    ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
170    ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4], 5);
171    ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13], 7);
172    ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6], 7);
173    ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15], 8);
174    ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8], 11);
175    ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1], 14);
176    ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
177    ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3], 12);
178    ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12], 6);
179
180    /* round 2: right lane */
181    ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6], 9);
182    ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
183    ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3], 15);
184    ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7], 7);
185    ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0], 12);
186    ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13], 8);
187    ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5], 9);
188    ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
189    ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14], 7);
190    ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15], 7);
191    ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8], 12);
192    ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12], 7);
193    ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4], 6);
194    ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9], 15);
195    ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1], 13);
196    ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2], 11);
197
198    /* round 3: right lane */
199    ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15], 9);
200    ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5], 7);
201    ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1], 15);
202    ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3], 11);
203    ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7], 8);
204    ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14], 6);
205    ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6], 6);
206    ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9], 14);
207    ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
208    ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8], 13);
209    ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12], 5);
210    ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2], 14);
211    ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
212    ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0], 13);
213    ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4], 7);
214    ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13], 5);
215
216    /* round 4: right lane */
217    ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8], 15);
218    ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6], 5);
219    ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4], 8);
220    ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1], 11);
221    ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3], 14);
222    ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14);
223    ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15], 6);
224    ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0], 14);
225    ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5], 6);
226    ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12], 9);
227    ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2], 12);
228    ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13], 9);
229    ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9], 12);
230    ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7], 5);
231    ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15);
232    ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14], 8);
233
234    /* round 5: right lane */
235    ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12], 8);
236    ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15], 5);
237    ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
238    ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4], 9);
239    ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1], 12);
240    ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5], 5);
241    ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8], 14);
242    ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7], 6);
243    ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6], 8);
244    ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2], 13);
245    ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13], 6);
246    ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14], 5);
247    ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0], 15);
248    ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3], 13);
249    ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9], 11);
250    ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
251
252    /* combine results */
253    ddd += cc + state[1]; /* final result for state[0] */
254    state[1] = state[2] + dd + eee;
255    state[2] = state[3] + ee + aaa;
256    state[3] = state[4] + aa + bbb;
257    state[4] = state[0] + bb + ccc;
258    state[0] = ddd;
259
260    return;
261}
262
263static int rmd160_init(struct shash_desc *desc)
264{
265    struct rmd160_ctx *rctx = shash_desc_ctx(desc);
266
267    rctx->byte_count = 0;
268
269    rctx->state[0] = RMD_H0;
270    rctx->state[1] = RMD_H1;
271    rctx->state[2] = RMD_H2;
272    rctx->state[3] = RMD_H3;
273    rctx->state[4] = RMD_H4;
274
275    memset(rctx->buffer, 0, sizeof(rctx->buffer));
276
277    return 0;
278}
279
280static int rmd160_update(struct shash_desc *desc, const u8 *data,
281             unsigned int len)
282{
283    struct rmd160_ctx *rctx = shash_desc_ctx(desc);
284    const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
285
286    rctx->byte_count += len;
287
288    /* Enough space in buffer? If so copy and we're done */
289    if (avail > len) {
290        memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
291               data, len);
292        goto out;
293    }
294
295    memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
296           data, avail);
297
298    rmd160_transform(rctx->state, rctx->buffer);
299    data += avail;
300    len -= avail;
301
302    while (len >= sizeof(rctx->buffer)) {
303        memcpy(rctx->buffer, data, sizeof(rctx->buffer));
304        rmd160_transform(rctx->state, rctx->buffer);
305        data += sizeof(rctx->buffer);
306        len -= sizeof(rctx->buffer);
307    }
308
309    memcpy(rctx->buffer, data, len);
310
311out:
312    return 0;
313}
314
315/* Add padding and return the message digest. */
316static int rmd160_final(struct shash_desc *desc, u8 *out)
317{
318    struct rmd160_ctx *rctx = shash_desc_ctx(desc);
319    u32 i, index, padlen;
320    __le64 bits;
321    __le32 *dst = (__le32 *)out;
322    static const u8 padding[64] = { 0x80, };
323
324    bits = cpu_to_le64(rctx->byte_count << 3);
325
326    /* Pad out to 56 mod 64 */
327    index = rctx->byte_count & 0x3f;
328    padlen = (index < 56) ? (56 - index) : ((64+56) - index);
329    rmd160_update(desc, padding, padlen);
330
331    /* Append length */
332    rmd160_update(desc, (const u8 *)&bits, sizeof(bits));
333
334    /* Store state in digest */
335    for (i = 0; i < 5; i++)
336        dst[i] = cpu_to_le32p(&rctx->state[i]);
337
338    /* Wipe context */
339    memset(rctx, 0, sizeof(*rctx));
340
341    return 0;
342}
343
344static struct shash_alg alg = {
345    .digestsize = RMD160_DIGEST_SIZE,
346    .init = rmd160_init,
347    .update = rmd160_update,
348    .final = rmd160_final,
349    .descsize = sizeof(struct rmd160_ctx),
350    .base = {
351        .cra_name = "rmd160",
352        .cra_flags = CRYPTO_ALG_TYPE_SHASH,
353        .cra_blocksize = RMD160_BLOCK_SIZE,
354        .cra_module = THIS_MODULE,
355    }
356};
357
358static int __init rmd160_mod_init(void)
359{
360    return crypto_register_shash(&alg);
361}
362
363static void __exit rmd160_mod_fini(void)
364{
365    crypto_unregister_shash(&alg);
366}
367
368module_init(rmd160_mod_init);
369module_exit(rmd160_mod_fini);
370
371MODULE_LICENSE("GPL");
372MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
373

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