LXR 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 <rueegsegger (at) swiss-it.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
  25struct 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
  54static 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
 282static 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
 304static 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
 335out:
 336        return 0;
 337}
 338
 339/* Add padding and return the message digest. */
 340static 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
 368static 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
 382static int __init rmd320_mod_init(void)
 383{
 384        return crypto_register_shash(&alg);
 385}
 386
 387static void __exit rmd320_mod_fini(void)
 388{
 389        crypto_unregister_shash(&alg);
 390}
 391
 392module_init(rmd320_mod_init);
 393module_exit(rmd320_mod_fini);
 394
 395MODULE_LICENSE("GPL");
 396MODULE_DESCRIPTION("RIPEMD-320 Message Digest");
 397