linux/crypto/rmd320.c
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   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 <linux/init.h>
  17#include <linux/module.h>
  18#include <linux/mm.h>
  19#include <linux/crypto.h>
  20#include <linux/cryptohash.h>
  21#include <linux/types.h>
  22#include <asm/byteorder.h>
  23
  24#include "ripemd.h"
  25
  26struct rmd320_ctx {
  27        u64 byte_count;
  28        u32 state[10];
  29        __le32 buffer[16];
  30};
  31
  32#define K1  RMD_K1
  33#define K2  RMD_K2
  34#define K3  RMD_K3
  35#define K4  RMD_K4
  36#define K5  RMD_K5
  37#define KK1 RMD_K6
  38#define KK2 RMD_K7
  39#define KK3 RMD_K8
  40#define KK4 RMD_K9
  41#define KK5 RMD_K1
  42
  43#define F1(x, y, z) (x ^ y ^ z)         /* XOR */
  44#define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
  45#define F3(x, y, z) ((x | ~y) ^ z)
  46#define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
  47#define F5(x, y, z) (x ^ (y | ~z))
  48
  49#define ROUND(a, b, c, d, e, f, k, x, s)  { \
  50        (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
  51        (a) = rol32((a), (s)) + (e); \
  52        (c) = rol32((c), 10); \
  53}
  54
  55static void rmd320_transform(u32 *state, const __le32 *in)
  56{
  57        u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee, tmp;
  58
  59        /* Initialize left lane */
  60        aa = state[0];
  61        bb = state[1];
  62        cc = state[2];
  63        dd = state[3];
  64        ee = state[4];
  65
  66        /* Initialize right lane */
  67        aaa = state[5];
  68        bbb = state[6];
  69        ccc = state[7];
  70        ddd = state[8];
  71        eee = state[9];
  72
  73        /* round 1: left lane */
  74        ROUND(aa, bb, cc, dd, ee, F1, K1, in[0],  11);
  75        ROUND(ee, aa, bb, cc, dd, F1, K1, in[1],  14);
  76        ROUND(dd, ee, aa, bb, cc, F1, K1, in[2],  15);
  77        ROUND(cc, dd, ee, aa, bb, F1, K1, in[3],  12);
  78        ROUND(bb, cc, dd, ee, aa, F1, K1, in[4],   5);
  79        ROUND(aa, bb, cc, dd, ee, F1, K1, in[5],   8);
  80        ROUND(ee, aa, bb, cc, dd, F1, K1, in[6],   7);
  81        ROUND(dd, ee, aa, bb, cc, F1, K1, in[7],   9);
  82        ROUND(cc, dd, ee, aa, bb, F1, K1, in[8],  11);
  83        ROUND(bb, cc, dd, ee, aa, F1, K1, in[9],  13);
  84        ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14);
  85        ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15);
  86        ROUND(dd, ee, aa, bb, cc, F1, K1, in[12],  6);
  87        ROUND(cc, dd, ee, aa, bb, F1, K1, in[13],  7);
  88        ROUND(bb, cc, dd, ee, aa, F1, K1, in[14],  9);
  89        ROUND(aa, bb, cc, dd, ee, F1, K1, in[15],  8);
  90
  91        /* round 1: right lane */
  92        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5],   8);
  93        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14],  9);
  94        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7],   9);
  95        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0],  11);
  96        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9],  13);
  97        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2],  15);
  98        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
  99        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4],   5);
 100        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13],  7);
 101        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6],   7);
 102        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15],  8);
 103        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8],  11);
 104        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1],  14);
 105        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
 106        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3],  12);
 107        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12],  6);
 108
 109        /* Swap contents of "a" registers */
 110        tmp = aa; aa = aaa; aaa = tmp;
 111
 112        /* round 2: left lane" */
 113        ROUND(ee, aa, bb, cc, dd, F2, K2, in[7],   7);
 114        ROUND(dd, ee, aa, bb, cc, F2, K2, in[4],   6);
 115        ROUND(cc, dd, ee, aa, bb, F2, K2, in[13],  8);
 116        ROUND(bb, cc, dd, ee, aa, F2, K2, in[1],  13);
 117        ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
 118        ROUND(ee, aa, bb, cc, dd, F2, K2, in[6],   9);
 119        ROUND(dd, ee, aa, bb, cc, F2, K2, in[15],  7);
 120        ROUND(cc, dd, ee, aa, bb, F2, K2, in[3],  15);
 121        ROUND(bb, cc, dd, ee, aa, F2, K2, in[12],  7);
 122        ROUND(aa, bb, cc, dd, ee, F2, K2, in[0],  12);
 123        ROUND(ee, aa, bb, cc, dd, F2, K2, in[9],  15);
 124        ROUND(dd, ee, aa, bb, cc, F2, K2, in[5],   9);
 125        ROUND(cc, dd, ee, aa, bb, F2, K2, in[2],  11);
 126        ROUND(bb, cc, dd, ee, aa, F2, K2, in[14],  7);
 127        ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
 128        ROUND(ee, aa, bb, cc, dd, F2, K2, in[8],  12);
 129
 130        /* round 2: right lane */
 131        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6],   9);
 132        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
 133        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3],  15);
 134        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7],   7);
 135        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0],  12);
 136        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13],  8);
 137        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5],   9);
 138        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
 139        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14],  7);
 140        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15],  7);
 141        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8],  12);
 142        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12],  7);
 143        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4],   6);
 144        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9],  15);
 145        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1],  13);
 146        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2],  11);
 147
 148        /* Swap contents of "b" registers */
 149        tmp = bb; bb = bbb; bbb = tmp;
 150
 151        /* round 3: left lane" */
 152        ROUND(dd, ee, aa, bb, cc, F3, K3, in[3],  11);
 153        ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
 154        ROUND(bb, cc, dd, ee, aa, F3, K3, in[14],  6);
 155        ROUND(aa, bb, cc, dd, ee, F3, K3, in[4],   7);
 156        ROUND(ee, aa, bb, cc, dd, F3, K3, in[9],  14);
 157        ROUND(dd, ee, aa, bb, cc, F3, K3, in[15],  9);
 158        ROUND(cc, dd, ee, aa, bb, F3, K3, in[8],  13);
 159        ROUND(bb, cc, dd, ee, aa, F3, K3, in[1],  15);
 160        ROUND(aa, bb, cc, dd, ee, F3, K3, in[2],  14);
 161        ROUND(ee, aa, bb, cc, dd, F3, K3, in[7],   8);
 162        ROUND(dd, ee, aa, bb, cc, F3, K3, in[0],  13);
 163        ROUND(cc, dd, ee, aa, bb, F3, K3, in[6],   6);
 164        ROUND(bb, cc, dd, ee, aa, F3, K3, in[13],  5);
 165        ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
 166        ROUND(ee, aa, bb, cc, dd, F3, K3, in[5],   7);
 167        ROUND(dd, ee, aa, bb, cc, F3, K3, in[12],  5);
 168
 169        /* round 3: right lane */
 170        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15],  9);
 171        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5],   7);
 172        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1],  15);
 173        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3],  11);
 174        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7],   8);
 175        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14],  6);
 176        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6],   6);
 177        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9],  14);
 178        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
 179        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8],  13);
 180        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12],  5);
 181        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2],  14);
 182        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
 183        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0],  13);
 184        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4],   7);
 185        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13],  5);
 186
 187        /* Swap contents of "c" registers */
 188        tmp = cc; cc = ccc; ccc = tmp;
 189
 190        /* round 4: left lane" */
 191        ROUND(cc, dd, ee, aa, bb, F4, K4, in[1],  11);
 192        ROUND(bb, cc, dd, ee, aa, F4, K4, in[9],  12);
 193        ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
 194        ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
 195        ROUND(dd, ee, aa, bb, cc, F4, K4, in[0],  14);
 196        ROUND(cc, dd, ee, aa, bb, F4, K4, in[8],  15);
 197        ROUND(bb, cc, dd, ee, aa, F4, K4, in[12],  9);
 198        ROUND(aa, bb, cc, dd, ee, F4, K4, in[4],   8);
 199        ROUND(ee, aa, bb, cc, dd, F4, K4, in[13],  9);
 200        ROUND(dd, ee, aa, bb, cc, F4, K4, in[3],  14);
 201        ROUND(cc, dd, ee, aa, bb, F4, K4, in[7],   5);
 202        ROUND(bb, cc, dd, ee, aa, F4, K4, in[15],  6);
 203        ROUND(aa, bb, cc, dd, ee, F4, K4, in[14],  8);
 204        ROUND(ee, aa, bb, cc, dd, F4, K4, in[5],   6);
 205        ROUND(dd, ee, aa, bb, cc, F4, K4, in[6],   5);
 206        ROUND(cc, dd, ee, aa, bb, F4, K4, in[2],  12);
 207
 208        /* round 4: right lane */
 209        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8],  15);
 210        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6],   5);
 211        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4],   8);
 212        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1],  11);
 213        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3],  14);
 214        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14);
 215        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15],  6);
 216        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0],  14);
 217        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5],   6);
 218        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12],  9);
 219        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2],  12);
 220        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13],  9);
 221        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9],  12);
 222        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7],   5);
 223        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15);
 224        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14],  8);
 225
 226        /* Swap contents of "d" registers */
 227        tmp = dd; dd = ddd; ddd = tmp;
 228
 229        /* round 5: left lane" */
 230        ROUND(bb, cc, dd, ee, aa, F5, K5, in[4],   9);
 231        ROUND(aa, bb, cc, dd, ee, F5, K5, in[0],  15);
 232        ROUND(ee, aa, bb, cc, dd, F5, K5, in[5],   5);
 233        ROUND(dd, ee, aa, bb, cc, F5, K5, in[9],  11);
 234        ROUND(cc, dd, ee, aa, bb, F5, K5, in[7],   6);
 235        ROUND(bb, cc, dd, ee, aa, F5, K5, in[12],  8);
 236        ROUND(aa, bb, cc, dd, ee, F5, K5, in[2],  13);
 237        ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
 238        ROUND(dd, ee, aa, bb, cc, F5, K5, in[14],  5);
 239        ROUND(cc, dd, ee, aa, bb, F5, K5, in[1],  12);
 240        ROUND(bb, cc, dd, ee, aa, F5, K5, in[3],  13);
 241        ROUND(aa, bb, cc, dd, ee, F5, K5, in[8],  14);
 242        ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
 243        ROUND(dd, ee, aa, bb, cc, F5, K5, in[6],   8);
 244        ROUND(cc, dd, ee, aa, bb, F5, K5, in[15],  5);
 245        ROUND(bb, cc, dd, ee, aa, F5, K5, in[13],  6);
 246
 247        /* round 5: right lane */
 248        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12],  8);
 249        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15],  5);
 250        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
 251        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4],   9);
 252        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1],  12);
 253        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5],   5);
 254        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8],  14);
 255        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7],   6);
 256        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6],   8);
 257        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2],  13);
 258        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13],  6);
 259        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14],  5);
 260        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0],  15);
 261        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3],  13);
 262        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9],  11);
 263        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
 264
 265        /* Swap contents of "e" registers */
 266        tmp = ee; ee = eee; eee = tmp;
 267
 268        /* combine results */
 269        state[0] += aa;
 270        state[1] += bb;
 271        state[2] += cc;
 272        state[3] += dd;
 273        state[4] += ee;
 274        state[5] += aaa;
 275        state[6] += bbb;
 276        state[7] += ccc;
 277        state[8] += ddd;
 278        state[9] += eee;
 279
 280        return;
 281}
 282
 283static void rmd320_init(struct crypto_tfm *tfm)
 284{
 285        struct rmd320_ctx *rctx = crypto_tfm_ctx(tfm);
 286
 287        rctx->byte_count = 0;
 288
 289        rctx->state[0] = RMD_H0;
 290        rctx->state[1] = RMD_H1;
 291        rctx->state[2] = RMD_H2;
 292        rctx->state[3] = RMD_H3;
 293        rctx->state[4] = RMD_H4;
 294        rctx->state[5] = RMD_H5;
 295        rctx->state[6] = RMD_H6;
 296        rctx->state[7] = RMD_H7;
 297        rctx->state[8] = RMD_H8;
 298        rctx->state[9] = RMD_H9;
 299
 300        memset(rctx->buffer, 0, sizeof(rctx->buffer));
 301}
 302
 303static void rmd320_update(struct crypto_tfm *tfm, const u8 *data,
 304                          unsigned int len)
 305{
 306        struct rmd320_ctx *rctx = crypto_tfm_ctx(tfm);
 307        const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
 308
 309        rctx->byte_count += len;
 310
 311        /* Enough space in buffer? If so copy and we're done */
 312        if (avail > len) {
 313                memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 314                       data, len);
 315                return;
 316        }
 317
 318        memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 319               data, avail);
 320
 321        rmd320_transform(rctx->state, rctx->buffer);
 322        data += avail;
 323        len -= avail;
 324
 325        while (len >= sizeof(rctx->buffer)) {
 326                memcpy(rctx->buffer, data, sizeof(rctx->buffer));
 327                rmd320_transform(rctx->state, rctx->buffer);
 328                data += sizeof(rctx->buffer);
 329                len -= sizeof(rctx->buffer);
 330        }
 331
 332        memcpy(rctx->buffer, data, len);
 333}
 334
 335/* Add padding and return the message digest. */
 336static void rmd320_final(struct crypto_tfm *tfm, u8 *out)
 337{
 338        struct rmd320_ctx *rctx = crypto_tfm_ctx(tfm);
 339        u32 i, index, padlen;
 340        __le64 bits;
 341        __le32 *dst = (__le32 *)out;
 342        static const u8 padding[64] = { 0x80, };
 343
 344        bits = cpu_to_le64(rctx->byte_count << 3);
 345
 346        /* Pad out to 56 mod 64 */
 347        index = rctx->byte_count & 0x3f;
 348        padlen = (index < 56) ? (56 - index) : ((64+56) - index);
 349        rmd320_update(tfm, padding, padlen);
 350
 351        /* Append length */
 352        rmd320_update(tfm, (const u8 *)&bits, sizeof(bits));
 353
 354        /* Store state in digest */
 355        for (i = 0; i < 10; i++)
 356                dst[i] = cpu_to_le32p(&rctx->state[i]);
 357
 358        /* Wipe context */
 359        memset(rctx, 0, sizeof(*rctx));
 360}
 361
 362static struct crypto_alg alg = {
 363        .cra_name        =      "rmd320",
 364        .cra_driver_name =      "rmd320",
 365        .cra_flags       =      CRYPTO_ALG_TYPE_DIGEST,
 366        .cra_blocksize   =      RMD320_BLOCK_SIZE,
 367        .cra_ctxsize     =      sizeof(struct rmd320_ctx),
 368        .cra_module      =      THIS_MODULE,
 369        .cra_list        =      LIST_HEAD_INIT(alg.cra_list),
 370        .cra_u           =      { .digest = {
 371        .dia_digestsize  =      RMD320_DIGEST_SIZE,
 372        .dia_init        =      rmd320_init,
 373        .dia_update      =      rmd320_update,
 374        .dia_final       =      rmd320_final } }
 375};
 376
 377static int __init rmd320_mod_init(void)
 378{
 379        return crypto_register_alg(&alg);
 380}
 381
 382static void __exit rmd320_mod_fini(void)
 383{
 384        crypto_unregister_alg(&alg);
 385}
 386
 387module_init(rmd320_mod_init);
 388module_exit(rmd320_mod_fini);
 389
 390MODULE_LICENSE("GPL");
 391MODULE_DESCRIPTION("RIPEMD-320 Message Digest");
 392
 393MODULE_ALIAS("rmd320");
 394
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