LXR 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 <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 rmd160_ctx {
  27        u64 byte_count;
  28        u32 state[5];
  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 rmd160_transform(u32 *state, const __le32 *in)
  56{
  57        u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee;
  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[0];
  68        bbb = state[1];
  69        ccc = state[2];
  70        ddd = state[3];
  71        eee = state[4];
  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 2: left lane" */
  92        ROUND(ee, aa, bb, cc, dd, F2, K2, in[7],   7);
  93        ROUND(dd, ee, aa, bb, cc, F2, K2, in[4],   6);
  94        ROUND(cc, dd, ee, aa, bb, F2, K2, in[13],  8);
  95        ROUND(bb, cc, dd, ee, aa, F2, K2, in[1],  13);
  96        ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
  97        ROUND(ee, aa, bb, cc, dd, F2, K2, in[6],   9);
  98        ROUND(dd, ee, aa, bb, cc, F2, K2, in[15],  7);
  99        ROUND(cc, dd, ee, aa, bb, F2, K2, in[3],  15);
 100        ROUND(bb, cc, dd, ee, aa, F2, K2, in[12],  7);
 101        ROUND(aa, bb, cc, dd, ee, F2, K2, in[0],  12);
 102        ROUND(ee, aa, bb, cc, dd, F2, K2, in[9],  15);
 103        ROUND(dd, ee, aa, bb, cc, F2, K2, in[5],   9);
 104        ROUND(cc, dd, ee, aa, bb, F2, K2, in[2],  11);
 105        ROUND(bb, cc, dd, ee, aa, F2, K2, in[14],  7);
 106        ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
 107        ROUND(ee, aa, bb, cc, dd, F2, K2, in[8],  12);
 108
 109        /* round 3: left lane" */
 110        ROUND(dd, ee, aa, bb, cc, F3, K3, in[3],  11);
 111        ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
 112        ROUND(bb, cc, dd, ee, aa, F3, K3, in[14],  6);
 113        ROUND(aa, bb, cc, dd, ee, F3, K3, in[4],   7);
 114        ROUND(ee, aa, bb, cc, dd, F3, K3, in[9],  14);
 115        ROUND(dd, ee, aa, bb, cc, F3, K3, in[15],  9);
 116        ROUND(cc, dd, ee, aa, bb, F3, K3, in[8],  13);
 117        ROUND(bb, cc, dd, ee, aa, F3, K3, in[1],  15);
 118        ROUND(aa, bb, cc, dd, ee, F3, K3, in[2],  14);
 119        ROUND(ee, aa, bb, cc, dd, F3, K3, in[7],   8);
 120        ROUND(dd, ee, aa, bb, cc, F3, K3, in[0],  13);
 121        ROUND(cc, dd, ee, aa, bb, F3, K3, in[6],   6);
 122        ROUND(bb, cc, dd, ee, aa, F3, K3, in[13],  5);
 123        ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
 124        ROUND(ee, aa, bb, cc, dd, F3, K3, in[5],   7);
 125        ROUND(dd, ee, aa, bb, cc, F3, K3, in[12],  5);
 126
 127        /* round 4: left lane" */
 128        ROUND(cc, dd, ee, aa, bb, F4, K4, in[1],  11);
 129        ROUND(bb, cc, dd, ee, aa, F4, K4, in[9],  12);
 130        ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
 131        ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
 132        ROUND(dd, ee, aa, bb, cc, F4, K4, in[0],  14);
 133        ROUND(cc, dd, ee, aa, bb, F4, K4, in[8],  15);
 134        ROUND(bb, cc, dd, ee, aa, F4, K4, in[12],  9);
 135        ROUND(aa, bb, cc, dd, ee, F4, K4, in[4],   8);
 136        ROUND(ee, aa, bb, cc, dd, F4, K4, in[13],  9);
 137        ROUND(dd, ee, aa, bb, cc, F4, K4, in[3],  14);
 138        ROUND(cc, dd, ee, aa, bb, F4, K4, in[7],   5);
 139        ROUND(bb, cc, dd, ee, aa, F4, K4, in[15],  6);
 140        ROUND(aa, bb, cc, dd, ee, F4, K4, in[14],  8);
 141        ROUND(ee, aa, bb, cc, dd, F4, K4, in[5],   6);
 142        ROUND(dd, ee, aa, bb, cc, F4, K4, in[6],   5);
 143        ROUND(cc, dd, ee, aa, bb, F4, K4, in[2],  12);
 144
 145        /* round 5: left lane" */
 146        ROUND(bb, cc, dd, ee, aa, F5, K5, in[4],   9);
 147        ROUND(aa, bb, cc, dd, ee, F5, K5, in[0],  15);
 148        ROUND(ee, aa, bb, cc, dd, F5, K5, in[5],   5);
 149        ROUND(dd, ee, aa, bb, cc, F5, K5, in[9],  11);
 150        ROUND(cc, dd, ee, aa, bb, F5, K5, in[7],   6);
 151        ROUND(bb, cc, dd, ee, aa, F5, K5, in[12],  8);
 152        ROUND(aa, bb, cc, dd, ee, F5, K5, in[2],  13);
 153        ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
 154        ROUND(dd, ee, aa, bb, cc, F5, K5, in[14],  5);
 155        ROUND(cc, dd, ee, aa, bb, F5, K5, in[1],  12);
 156        ROUND(bb, cc, dd, ee, aa, F5, K5, in[3],  13);
 157        ROUND(aa, bb, cc, dd, ee, F5, K5, in[8],  14);
 158        ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
 159        ROUND(dd, ee, aa, bb, cc, F5, K5, in[6],   8);
 160        ROUND(cc, dd, ee, aa, bb, F5, K5, in[15],  5);
 161        ROUND(bb, cc, dd, ee, aa, F5, K5, in[13],  6);
 162
 163        /* round 1: right lane */
 164        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5],   8);
 165        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14],  9);
 166        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7],   9);
 167        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0],  11);
 168        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9],  13);
 169        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2],  15);
 170        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
 171        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4],   5);
 172        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13],  7);
 173        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6],   7);
 174        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15],  8);
 175        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8],  11);
 176        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1],  14);
 177        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
 178        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3],  12);
 179        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12],  6);
 180
 181        /* round 2: right lane */
 182        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6],   9);
 183        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
 184        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3],  15);
 185        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7],   7);
 186        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0],  12);
 187        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13],  8);
 188        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5],   9);
 189        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
 190        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14],  7);
 191        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15],  7);
 192        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8],  12);
 193        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12],  7);
 194        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4],   6);
 195        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9],  15);
 196        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1],  13);
 197        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2],  11);
 198
 199        /* round 3: right lane */
 200        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15],  9);
 201        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5],   7);
 202        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1],  15);
 203        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3],  11);
 204        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7],   8);
 205        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14],  6);
 206        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6],   6);
 207        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9],  14);
 208        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
 209        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8],  13);
 210        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12],  5);
 211        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2],  14);
 212        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
 213        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0],  13);
 214        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4],   7);
 215        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13],  5);
 216
 217        /* round 4: right lane */
 218        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8],  15);
 219        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6],   5);
 220        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4],   8);
 221        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1],  11);
 222        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3],  14);
 223        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14);
 224        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15],  6);
 225        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0],  14);
 226        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5],   6);
 227        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12],  9);
 228        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2],  12);
 229        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13],  9);
 230        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9],  12);
 231        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7],   5);
 232        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15);
 233        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14],  8);
 234
 235        /* round 5: right lane */
 236        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12],  8);
 237        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15],  5);
 238        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
 239        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4],   9);
 240        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1],  12);
 241        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5],   5);
 242        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8],  14);
 243        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7],   6);
 244        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6],   8);
 245        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2],  13);
 246        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13],  6);
 247        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14],  5);
 248        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0],  15);
 249        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3],  13);
 250        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9],  11);
 251        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
 252
 253        /* combine results */
 254        ddd += cc + state[1];           /* final result for state[0] */
 255        state[1] = state[2] + dd + eee;
 256        state[2] = state[3] + ee + aaa;
 257        state[3] = state[4] + aa + bbb;
 258        state[4] = state[0] + bb + ccc;
 259        state[0] = ddd;
 260
 261        return;
 262}
 263
 264static void rmd160_init(struct crypto_tfm *tfm)
 265{
 266        struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm);
 267
 268        rctx->byte_count = 0;
 269
 270        rctx->state[0] = RMD_H0;
 271        rctx->state[1] = RMD_H1;
 272        rctx->state[2] = RMD_H2;
 273        rctx->state[3] = RMD_H3;
 274        rctx->state[4] = RMD_H4;
 275
 276        memset(rctx->buffer, 0, sizeof(rctx->buffer));
 277}
 278
 279static void rmd160_update(struct crypto_tfm *tfm, const u8 *data,
 280                          unsigned int len)
 281{
 282        struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm);
 283        const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
 284
 285        rctx->byte_count += len;
 286
 287        /* Enough space in buffer? If so copy and we're done */
 288        if (avail > len) {
 289                memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 290                       data, len);
 291                return;
 292        }
 293
 294        memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 295               data, avail);
 296
 297        rmd160_transform(rctx->state, rctx->buffer);
 298        data += avail;
 299        len -= avail;
 300
 301        while (len >= sizeof(rctx->buffer)) {
 302                memcpy(rctx->buffer, data, sizeof(rctx->buffer));
 303                rmd160_transform(rctx->state, rctx->buffer);
 304                data += sizeof(rctx->buffer);
 305                len -= sizeof(rctx->buffer);
 306        }
 307
 308        memcpy(rctx->buffer, data, len);
 309}
 310
 311/* Add padding and return the message digest. */
 312static void rmd160_final(struct crypto_tfm *tfm, u8 *out)
 313{
 314        struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm);
 315        u32 i, index, padlen;
 316        __le64 bits;
 317        __le32 *dst = (__le32 *)out;
 318        static const u8 padding[64] = { 0x80, };
 319
 320        bits = cpu_to_le64(rctx->byte_count << 3);
 321
 322        /* Pad out to 56 mod 64 */
 323        index = rctx->byte_count & 0x3f;
 324        padlen = (index < 56) ? (56 - index) : ((64+56) - index);
 325        rmd160_update(tfm, padding, padlen);
 326
 327        /* Append length */
 328        rmd160_update(tfm, (const u8 *)&bits, sizeof(bits));
 329
 330        /* Store state in digest */
 331        for (i = 0; i < 5; i++)
 332                dst[i] = cpu_to_le32p(&rctx->state[i]);
 333
 334        /* Wipe context */
 335        memset(rctx, 0, sizeof(*rctx));
 336}
 337
 338static struct crypto_alg alg = {
 339        .cra_name        =      "rmd160",
 340        .cra_driver_name =      "rmd160",
 341        .cra_flags       =      CRYPTO_ALG_TYPE_DIGEST,
 342        .cra_blocksize   =      RMD160_BLOCK_SIZE,
 343        .cra_ctxsize     =      sizeof(struct rmd160_ctx),
 344        .cra_module      =      THIS_MODULE,
 345        .cra_list        =      LIST_HEAD_INIT(alg.cra_list),
 346        .cra_u           =      { .digest = {
 347        .dia_digestsize  =      RMD160_DIGEST_SIZE,
 348        .dia_init        =      rmd160_init,
 349        .dia_update      =      rmd160_update,
 350        .dia_final       =      rmd160_final } }
 351};
 352
 353static int __init rmd160_mod_init(void)
 354{
 355        return crypto_register_alg(&alg);
 356}
 357
 358static void __exit rmd160_mod_fini(void)
 359{
 360        crypto_unregister_alg(&alg);
 361}
 362
 363module_init(rmd160_mod_init);
 364module_exit(rmd160_mod_fini);
 365
 366MODULE_LICENSE("GPL");
 367MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
 368
 369MODULE_ALIAS("rmd160");
 370