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
 280 static int rmd320_init(struct shash_desc *desc)
 281 {
 282         struct rmd320_ctx *rctx = shash_desc_ctx(desc);
 283
 284         rctx->byte_count = 0;
 285
 286         rctx->state[0] = RMD_H0;
 287         rctx->state[1] = RMD_H1;
 288         rctx->state[2] = RMD_H2;
 289         rctx->state[3] = RMD_H3;
 290         rctx->state[4] = RMD_H4;
 291         rctx->state[5] = RMD_H5;
 292         rctx->state[6] = RMD_H6;
 293         rctx->state[7] = RMD_H7;
 294         rctx->state[8] = RMD_H8;
 295         rctx->state[9] = RMD_H9;
 296
 297         memset(rctx->buffer, 0, sizeof(rctx->buffer));
 298
 299         return 0;
 300 }
 301
 302 static int rmd320_update(struct shash_desc *desc, const u8 *data,
 303                          unsigned int len)
 304 {
 305         struct rmd320_ctx *rctx = shash_desc_ctx(desc);
 306         const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
 307
 308         rctx->byte_count += len;
 309
 310         /* Enough space in buffer? If so copy and we're done */
 311         if (avail > len) {
 312                 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 313                        data, len);
 314                 goto out;
 315         }
 316
 317         memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 318                data, avail);
 319
 320         rmd320_transform(rctx->state, rctx->buffer);
 321         data += avail;
 322         len -= avail;
 323
 324         while (len >= sizeof(rctx->buffer)) {
 325                 memcpy(rctx->buffer, data, sizeof(rctx->buffer));
 326                 rmd320_transform(rctx->state, rctx->buffer);
 327                 data += sizeof(rctx->buffer);
 328                 len -= sizeof(rctx->buffer);
 329         }
 330
 331         memcpy(rctx->buffer, data, len);
 332
 333 out:
 334         return 0;
 335 }
 336
 337 /* Add padding and return the message digest. */
 338 static int rmd320_final(struct shash_desc *desc, u8 *out)
 339 {
 340         struct rmd320_ctx *rctx = shash_desc_ctx(desc);
 341         u32 i, index, padlen;
 342         __le64 bits;
 343         __le32 *dst = (__le32 *)out;
 344         static const u8 padding[64] = { 0x80, };
 345
 346         bits = cpu_to_le64(rctx->byte_count << 3);
 347
 348         /* Pad out to 56 mod 64 */
 349         index = rctx->byte_count & 0x3f;
 350         padlen = (index < 56) ? (56 - index) : ((64+56) - index);
 351         rmd320_update(desc, padding, padlen);
 352
 353         /* Append length */
 354         rmd320_update(desc, (const u8 *)&bits, sizeof(bits));
 355
 356         /* Store state in digest */
 357         for (i = 0; i < 10; i++)
 358                 dst[i] = cpu_to_le32p(&rctx->state[i]);
 359
 360         /* Wipe context */
 361         memset(rctx, 0, sizeof(*rctx));
 362
 363         return 0;
 364 }
 365
 366 static struct shash_alg alg = {
 367         .digestsize     =       RMD320_DIGEST_SIZE,
 368         .init           =       rmd320_init,
 369         .update         =       rmd320_update,
 370         .final          =       rmd320_final,
 371         .descsize       =       sizeof(struct rmd320_ctx),
 372         .base           =       {
 373                 .cra_name        =      "rmd320",
 374                 .cra_flags       =      CRYPTO_ALG_TYPE_SHASH,
 375                 .cra_blocksize   =      RMD320_BLOCK_SIZE,
 376                 .cra_module      =      THIS_MODULE,
 377         }
 378 };
 379
 380 static int __init rmd320_mod_init(void)
 381 {
 382         return crypto_register_shash(&alg);
 383 }
 384
 385 static void __exit rmd320_mod_fini(void)
 386 {
 387         crypto_unregister_shash(&alg);
 388 }
 389
 390 module_init(rmd320_mod_init);
 391 module_exit(rmd320_mod_fini);
 392
 393 MODULE_LICENSE("GPL");
 394 MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
 395 MODULE_DESCRIPTION("RIPEMD-320 Message Digest");
 396 MODULE_ALIAS_CRYPTO("rmd320");