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rmd320.c
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1 /*
2  * Cryptographic API.
3  *
4  * RIPEMD-320 - 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 <[email protected]>
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 
25 struct rmd320_ctx {
26  u64 byte_count;
27  u32 state[10];
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 
54 static void rmd320_transform(u32 *state, const __le32 *in)
55 {
56  u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee, tmp;
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[5];
67  bbb = state[6];
68  ccc = state[7];
69  ddd = state[8];
70  eee = state[9];
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 1: right lane */
91  ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5], 8);
92  ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14], 9);
93  ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7], 9);
94  ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0], 11);
95  ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9], 13);
96  ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2], 15);
97  ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
98  ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4], 5);
99  ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13], 7);
100  ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6], 7);
101  ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15], 8);
102  ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8], 11);
103  ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1], 14);
104  ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
105  ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3], 12);
106  ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12], 6);
107 
108  /* Swap contents of "a" registers */
109  tmp = aa; aa = aaa; aaa = tmp;
110 
111  /* round 2: left lane" */
112  ROUND(ee, aa, bb, cc, dd, F2, K2, in[7], 7);
113  ROUND(dd, ee, aa, bb, cc, F2, K2, in[4], 6);
114  ROUND(cc, dd, ee, aa, bb, F2, K2, in[13], 8);
115  ROUND(bb, cc, dd, ee, aa, F2, K2, in[1], 13);
116  ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
117  ROUND(ee, aa, bb, cc, dd, F2, K2, in[6], 9);
118  ROUND(dd, ee, aa, bb, cc, F2, K2, in[15], 7);
119  ROUND(cc, dd, ee, aa, bb, F2, K2, in[3], 15);
120  ROUND(bb, cc, dd, ee, aa, F2, K2, in[12], 7);
121  ROUND(aa, bb, cc, dd, ee, F2, K2, in[0], 12);
122  ROUND(ee, aa, bb, cc, dd, F2, K2, in[9], 15);
123  ROUND(dd, ee, aa, bb, cc, F2, K2, in[5], 9);
124  ROUND(cc, dd, ee, aa, bb, F2, K2, in[2], 11);
125  ROUND(bb, cc, dd, ee, aa, F2, K2, in[14], 7);
126  ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
127  ROUND(ee, aa, bb, cc, dd, F2, K2, in[8], 12);
128 
129  /* round 2: right lane */
130  ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6], 9);
131  ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
132  ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3], 15);
133  ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7], 7);
134  ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0], 12);
135  ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13], 8);
136  ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5], 9);
137  ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
138  ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14], 7);
139  ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15], 7);
140  ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8], 12);
141  ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12], 7);
142  ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4], 6);
143  ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9], 15);
144  ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1], 13);
145  ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2], 11);
146 
147  /* Swap contents of "b" registers */
148  tmp = bb; bb = bbb; bbb = tmp;
149 
150  /* round 3: left lane" */
151  ROUND(dd, ee, aa, bb, cc, F3, K3, in[3], 11);
152  ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
153  ROUND(bb, cc, dd, ee, aa, F3, K3, in[14], 6);
154  ROUND(aa, bb, cc, dd, ee, F3, K3, in[4], 7);
155  ROUND(ee, aa, bb, cc, dd, F3, K3, in[9], 14);
156  ROUND(dd, ee, aa, bb, cc, F3, K3, in[15], 9);
157  ROUND(cc, dd, ee, aa, bb, F3, K3, in[8], 13);
158  ROUND(bb, cc, dd, ee, aa, F3, K3, in[1], 15);
159  ROUND(aa, bb, cc, dd, ee, F3, K3, in[2], 14);
160  ROUND(ee, aa, bb, cc, dd, F3, K3, in[7], 8);
161  ROUND(dd, ee, aa, bb, cc, F3, K3, in[0], 13);
162  ROUND(cc, dd, ee, aa, bb, F3, K3, in[6], 6);
163  ROUND(bb, cc, dd, ee, aa, F3, K3, in[13], 5);
164  ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
165  ROUND(ee, aa, bb, cc, dd, F3, K3, in[5], 7);
166  ROUND(dd, ee, aa, bb, cc, F3, K3, in[12], 5);
167 
168  /* round 3: right lane */
169  ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15], 9);
170  ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5], 7);
171  ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1], 15);
172  ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3], 11);
173  ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7], 8);
174  ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14], 6);
175  ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6], 6);
176  ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9], 14);
177  ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
178  ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8], 13);
179  ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12], 5);
180  ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2], 14);
181  ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
182  ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0], 13);
183  ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4], 7);
184  ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13], 5);
185 
186  /* Swap contents of "c" registers */
187  tmp = cc; cc = ccc; ccc = tmp;
188 
189  /* round 4: left lane" */
190  ROUND(cc, dd, ee, aa, bb, F4, K4, in[1], 11);
191  ROUND(bb, cc, dd, ee, aa, F4, K4, in[9], 12);
192  ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
193  ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
194  ROUND(dd, ee, aa, bb, cc, F4, K4, in[0], 14);
195  ROUND(cc, dd, ee, aa, bb, F4, K4, in[8], 15);
196  ROUND(bb, cc, dd, ee, aa, F4, K4, in[12], 9);
197  ROUND(aa, bb, cc, dd, ee, F4, K4, in[4], 8);
198  ROUND(ee, aa, bb, cc, dd, F4, K4, in[13], 9);
199  ROUND(dd, ee, aa, bb, cc, F4, K4, in[3], 14);
200  ROUND(cc, dd, ee, aa, bb, F4, K4, in[7], 5);
201  ROUND(bb, cc, dd, ee, aa, F4, K4, in[15], 6);
202  ROUND(aa, bb, cc, dd, ee, F4, K4, in[14], 8);
203  ROUND(ee, aa, bb, cc, dd, F4, K4, in[5], 6);
204  ROUND(dd, ee, aa, bb, cc, F4, K4, in[6], 5);
205  ROUND(cc, dd, ee, aa, bb, F4, K4, in[2], 12);
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  /* Swap contents of "d" registers */
226  tmp = dd; dd = ddd; ddd = tmp;
227 
228  /* round 5: left lane" */
229  ROUND(bb, cc, dd, ee, aa, F5, K5, in[4], 9);
230  ROUND(aa, bb, cc, dd, ee, F5, K5, in[0], 15);
231  ROUND(ee, aa, bb, cc, dd, F5, K5, in[5], 5);
232  ROUND(dd, ee, aa, bb, cc, F5, K5, in[9], 11);
233  ROUND(cc, dd, ee, aa, bb, F5, K5, in[7], 6);
234  ROUND(bb, cc, dd, ee, aa, F5, K5, in[12], 8);
235  ROUND(aa, bb, cc, dd, ee, F5, K5, in[2], 13);
236  ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
237  ROUND(dd, ee, aa, bb, cc, F5, K5, in[14], 5);
238  ROUND(cc, dd, ee, aa, bb, F5, K5, in[1], 12);
239  ROUND(bb, cc, dd, ee, aa, F5, K5, in[3], 13);
240  ROUND(aa, bb, cc, dd, ee, F5, K5, in[8], 14);
241  ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
242  ROUND(dd, ee, aa, bb, cc, F5, K5, in[6], 8);
243  ROUND(cc, dd, ee, aa, bb, F5, K5, in[15], 5);
244  ROUND(bb, cc, dd, ee, aa, F5, K5, in[13], 6);
245 
246  /* round 5: right lane */
247  ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12], 8);
248  ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15], 5);
249  ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
250  ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4], 9);
251  ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1], 12);
252  ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5], 5);
253  ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8], 14);
254  ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7], 6);
255  ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6], 8);
256  ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2], 13);
257  ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13], 6);
258  ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14], 5);
259  ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0], 15);
260  ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3], 13);
261  ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9], 11);
262  ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
263 
264  /* Swap contents of "e" registers */
265  tmp = ee; ee = eee; eee = tmp;
266 
267  /* combine results */
268  state[0] += aa;
269  state[1] += bb;
270  state[2] += cc;
271  state[3] += dd;
272  state[4] += ee;
273  state[5] += aaa;
274  state[6] += bbb;
275  state[7] += ccc;
276  state[8] += ddd;
277  state[9] += eee;
278 
279  return;
280 }
281 
282 static int rmd320_init(struct shash_desc *desc)
283 {
284  struct rmd320_ctx *rctx = shash_desc_ctx(desc);
285 
286  rctx->byte_count = 0;
287 
288  rctx->state[0] = RMD_H0;
289  rctx->state[1] = RMD_H1;
290  rctx->state[2] = RMD_H2;
291  rctx->state[3] = RMD_H3;
292  rctx->state[4] = RMD_H4;
293  rctx->state[5] = RMD_H5;
294  rctx->state[6] = RMD_H6;
295  rctx->state[7] = RMD_H7;
296  rctx->state[8] = RMD_H8;
297  rctx->state[9] = RMD_H9;
298 
299  memset(rctx->buffer, 0, sizeof(rctx->buffer));
300 
301  return 0;
302 }
303 
304 static int rmd320_update(struct shash_desc *desc, const u8 *data,
305  unsigned int len)
306 {
307  struct rmd320_ctx *rctx = shash_desc_ctx(desc);
308  const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
309 
310  rctx->byte_count += len;
311 
312  /* Enough space in buffer? If so copy and we're done */
313  if (avail > len) {
314  memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
315  data, len);
316  goto out;
317  }
318 
319  memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
320  data, avail);
321 
322  rmd320_transform(rctx->state, rctx->buffer);
323  data += avail;
324  len -= avail;
325 
326  while (len >= sizeof(rctx->buffer)) {
327  memcpy(rctx->buffer, data, sizeof(rctx->buffer));
328  rmd320_transform(rctx->state, rctx->buffer);
329  data += sizeof(rctx->buffer);
330  len -= sizeof(rctx->buffer);
331  }
332 
333  memcpy(rctx->buffer, data, len);
334 
335 out:
336  return 0;
337 }
338 
339 /* Add padding and return the message digest. */
340 static int rmd320_final(struct shash_desc *desc, u8 *out)
341 {
342  struct rmd320_ctx *rctx = shash_desc_ctx(desc);
343  u32 i, index, padlen;
344  __le64 bits;
345  __le32 *dst = (__le32 *)out;
346  static const u8 padding[64] = { 0x80, };
347 
348  bits = cpu_to_le64(rctx->byte_count << 3);
349 
350  /* Pad out to 56 mod 64 */
351  index = rctx->byte_count & 0x3f;
352  padlen = (index < 56) ? (56 - index) : ((64+56) - index);
353  rmd320_update(desc, padding, padlen);
354 
355  /* Append length */
356  rmd320_update(desc, (const u8 *)&bits, sizeof(bits));
357 
358  /* Store state in digest */
359  for (i = 0; i < 10; i++)
360  dst[i] = cpu_to_le32p(&rctx->state[i]);
361 
362  /* Wipe context */
363  memset(rctx, 0, sizeof(*rctx));
364 
365  return 0;
366 }
367 
368 static struct shash_alg alg = {
369  .digestsize = RMD320_DIGEST_SIZE,
370  .init = rmd320_init,
371  .update = rmd320_update,
372  .final = rmd320_final,
373  .descsize = sizeof(struct rmd320_ctx),
374  .base = {
375  .cra_name = "rmd320",
376  .cra_flags = CRYPTO_ALG_TYPE_SHASH,
377  .cra_blocksize = RMD320_BLOCK_SIZE,
378  .cra_module = THIS_MODULE,
379  }
380 };
381 
382 static int __init rmd320_mod_init(void)
383 {
384  return crypto_register_shash(&alg);
385 }
386 
387 static void __exit rmd320_mod_fini(void)
388 {
389  crypto_unregister_shash(&alg);
390 }
391 
392 module_init(rmd320_mod_init);
393 module_exit(rmd320_mod_fini);
394 
395 MODULE_LICENSE("GPL");
396 MODULE_AUTHOR("Adrian-Ken Rueegsegger <[email protected]>");
397 MODULE_DESCRIPTION("RIPEMD-320 Message Digest");
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