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Linux/crypto/rmd320.c

  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 <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 
 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 <ken@codelabs.ch>");
397 MODULE_DESCRIPTION("RIPEMD-320 Message Digest");
398 MODULE_ALIAS_CRYPTO("rmd320");
399 

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