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Linux/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 <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 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 <ken@codelabs.ch>");
373 MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
374 MODULE_ALIAS_CRYPTO("rmd160");
375 

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