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rmd160.c
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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 <[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 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 
54 static 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 
263 static 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 
280 static 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 
311 out:
312  return 0;
313 }
314 
315 /* Add padding and return the message digest. */
316 static 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 
344 static 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 
358 static int __init rmd160_mod_init(void)
359 {
360  return crypto_register_shash(&alg);
361 }
362 
363 static void __exit rmd160_mod_fini(void)
364 {
365  crypto_unregister_shash(&alg);
366 }
367 
368 module_init(rmd160_mod_init);
369 module_exit(rmd160_mod_fini);
370 
371 MODULE_LICENSE("GPL");
372 MODULE_AUTHOR("Adrian-Ken Rueegsegger <[email protected]>");
373 MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
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