linux/crypto/rmd320.c
<<
>>
Prefs 
   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Cryptographic API.
   4 *
   5 * RIPEMD-320 - RACE Integrity Primitives Evaluation Message Digest.
   6 *
   7 * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC
   8 *
   9 * Copyright (c) 2008 Adrian-Ken Rueegsegger <ken@codelabs.ch>
  10 */
  11#include <crypto/internal/hash.h>
  12#include <linux/init.h>
  13#include <linux/module.h>
  14#include <linux/mm.h>
  15#include <linux/types.h>
  16#include <asm/byteorder.h>
  17
  18#include "ripemd.h"
  19
  20struct rmd320_ctx {
  21        u64 byte_count;
  22        u32 state[10];
  23        __le32 buffer[16];
  24};
  25
  26#define K1  RMD_K1
  27#define K2  RMD_K2
  28#define K3  RMD_K3
  29#define K4  RMD_K4
  30#define K5  RMD_K5
  31#define KK1 RMD_K6
  32#define KK2 RMD_K7
  33#define KK3 RMD_K8
  34#define KK4 RMD_K9
  35#define KK5 RMD_K1
  36
  37#define F1(x, y, z) (x ^ y ^ z)         /* XOR */
  38#define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
  39#define F3(x, y, z) ((x | ~y) ^ z)
  40#define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
  41#define F5(x, y, z) (x ^ (y | ~z))
  42
  43#define ROUND(a, b, c, d, e, f, k, x, s)  { \
  44        (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
  45        (a) = rol32((a), (s)) + (e); \
  46        (c) = rol32((c), 10); \
  47}
  48
  49static void rmd320_transform(u32 *state, const __le32 *in)
  50{
  51        u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee;
  52
  53        /* Initialize left lane */
  54        aa = state[0];
  55        bb = state[1];
  56        cc = state[2];
  57        dd = state[3];
  58        ee = state[4];
  59
  60        /* Initialize right lane */
  61        aaa = state[5];
  62        bbb = state[6];
  63        ccc = state[7];
  64        ddd = state[8];
  65        eee = state[9];
  66
  67        /* round 1: left lane */
  68        ROUND(aa, bb, cc, dd, ee, F1, K1, in[0],  11);
  69        ROUND(ee, aa, bb, cc, dd, F1, K1, in[1],  14);
  70        ROUND(dd, ee, aa, bb, cc, F1, K1, in[2],  15);
  71        ROUND(cc, dd, ee, aa, bb, F1, K1, in[3],  12);
  72        ROUND(bb, cc, dd, ee, aa, F1, K1, in[4],   5);
  73        ROUND(aa, bb, cc, dd, ee, F1, K1, in[5],   8);
  74        ROUND(ee, aa, bb, cc, dd, F1, K1, in[6],   7);
  75        ROUND(dd, ee, aa, bb, cc, F1, K1, in[7],   9);
  76        ROUND(cc, dd, ee, aa, bb, F1, K1, in[8],  11);
  77        ROUND(bb, cc, dd, ee, aa, F1, K1, in[9],  13);
  78        ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14);
  79        ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15);
  80        ROUND(dd, ee, aa, bb, cc, F1, K1, in[12],  6);
  81        ROUND(cc, dd, ee, aa, bb, F1, K1, in[13],  7);
  82        ROUND(bb, cc, dd, ee, aa, F1, K1, in[14],  9);
  83        ROUND(aa, bb, cc, dd, ee, F1, K1, in[15],  8);
  84
  85        /* round 1: right lane */
  86        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5],   8);
  87        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14],  9);
  88        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7],   9);
  89        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0],  11);
  90        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9],  13);
  91        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2],  15);
  92        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
  93        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4],   5);
  94        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13],  7);
  95        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6],   7);
  96        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15],  8);
  97        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8],  11);
  98        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1],  14);
  99        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
 100        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3],  12);
 101        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12],  6);
 102
 103        /* Swap contents of "a" registers */
 104        swap(aa, aaa);
 105
 106        /* round 2: left lane" */
 107        ROUND(ee, aa, bb, cc, dd, F2, K2, in[7],   7);
 108        ROUND(dd, ee, aa, bb, cc, F2, K2, in[4],   6);
 109        ROUND(cc, dd, ee, aa, bb, F2, K2, in[13],  8);
 110        ROUND(bb, cc, dd, ee, aa, F2, K2, in[1],  13);
 111        ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
 112        ROUND(ee, aa, bb, cc, dd, F2, K2, in[6],   9);
 113        ROUND(dd, ee, aa, bb, cc, F2, K2, in[15],  7);
 114        ROUND(cc, dd, ee, aa, bb, F2, K2, in[3],  15);
 115        ROUND(bb, cc, dd, ee, aa, F2, K2, in[12],  7);
 116        ROUND(aa, bb, cc, dd, ee, F2, K2, in[0],  12);
 117        ROUND(ee, aa, bb, cc, dd, F2, K2, in[9],  15);
 118        ROUND(dd, ee, aa, bb, cc, F2, K2, in[5],   9);
 119        ROUND(cc, dd, ee, aa, bb, F2, K2, in[2],  11);
 120        ROUND(bb, cc, dd, ee, aa, F2, K2, in[14],  7);
 121        ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
 122        ROUND(ee, aa, bb, cc, dd, F2, K2, in[8],  12);
 123
 124        /* round 2: right lane */
 125        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6],   9);
 126        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
 127        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3],  15);
 128        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7],   7);
 129        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0],  12);
 130        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13],  8);
 131        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5],   9);
 132        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
 133        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14],  7);
 134        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15],  7);
 135        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8],  12);
 136        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12],  7);
 137        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4],   6);
 138        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9],  15);
 139        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1],  13);
 140        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2],  11);
 141
 142        /* Swap contents of "b" registers */
 143        swap(bb, bbb);
 144
 145        /* round 3: left lane" */
 146        ROUND(dd, ee, aa, bb, cc, F3, K3, in[3],  11);
 147        ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
 148        ROUND(bb, cc, dd, ee, aa, F3, K3, in[14],  6);
 149        ROUND(aa, bb, cc, dd, ee, F3, K3, in[4],   7);
 150        ROUND(ee, aa, bb, cc, dd, F3, K3, in[9],  14);
 151        ROUND(dd, ee, aa, bb, cc, F3, K3, in[15],  9);
 152        ROUND(cc, dd, ee, aa, bb, F3, K3, in[8],  13);
 153        ROUND(bb, cc, dd, ee, aa, F3, K3, in[1],  15);
 154        ROUND(aa, bb, cc, dd, ee, F3, K3, in[2],  14);
 155        ROUND(ee, aa, bb, cc, dd, F3, K3, in[7],   8);
 156        ROUND(dd, ee, aa, bb, cc, F3, K3, in[0],  13);
 157        ROUND(cc, dd, ee, aa, bb, F3, K3, in[6],   6);
 158        ROUND(bb, cc, dd, ee, aa, F3, K3, in[13],  5);
 159        ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
 160        ROUND(ee, aa, bb, cc, dd, F3, K3, in[5],   7);
 161        ROUND(dd, ee, aa, bb, cc, F3, K3, in[12],  5);
 162
 163        /* round 3: right lane */
 164        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15],  9);
 165        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5],   7);
 166        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1],  15);
 167        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3],  11);
 168        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7],   8);
 169        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14],  6);
 170        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6],   6);
 171        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9],  14);
 172        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
 173        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8],  13);
 174        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12],  5);
 175        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2],  14);
 176        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
 177        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0],  13);
 178        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4],   7);
 179        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13],  5);
 180
 181        /* Swap contents of "c" registers */
 182        swap(cc, ccc);
 183
 184        /* round 4: left lane" */
 185        ROUND(cc, dd, ee, aa, bb, F4, K4, in[1],  11);
 186        ROUND(bb, cc, dd, ee, aa, F4, K4, in[9],  12);
 187        ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
 188        ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
 189        ROUND(dd, ee, aa, bb, cc, F4, K4, in[0],  14);
 190        ROUND(cc, dd, ee, aa, bb, F4, K4, in[8],  15);
 191        ROUND(bb, cc, dd, ee, aa, F4, K4, in[12],  9);
 192        ROUND(aa, bb, cc, dd, ee, F4, K4, in[4],   8);
 193        ROUND(ee, aa, bb, cc, dd, F4, K4, in[13],  9);
 194        ROUND(dd, ee, aa, bb, cc, F4, K4, in[3],  14);
 195        ROUND(cc, dd, ee, aa, bb, F4, K4, in[7],   5);
 196        ROUND(bb, cc, dd, ee, aa, F4, K4, in[15],  6);
 197        ROUND(aa, bb, cc, dd, ee, F4, K4, in[14],  8);
 198        ROUND(ee, aa, bb, cc, dd, F4, K4, in[5],   6);
 199        ROUND(dd, ee, aa, bb, cc, F4, K4, in[6],   5);
 200        ROUND(cc, dd, ee, aa, bb, F4, K4, in[2],  12);
 201
 202        /* round 4: right lane */
 203        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8],  15);
 204        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6],   5);
 205        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4],   8);
 206        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1],  11);
 207        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3],  14);
 208        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14);
 209        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15],  6);
 210        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0],  14);
 211        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5],   6);
 212        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12],  9);
 213        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2],  12);
 214        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13],  9);
 215        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9],  12);
 216        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7],   5);
 217        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15);
 218        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14],  8);
 219
 220        /* Swap contents of "d" registers */
 221        swap(dd, ddd);
 222
 223        /* round 5: left lane" */
 224        ROUND(bb, cc, dd, ee, aa, F5, K5, in[4],   9);
 225        ROUND(aa, bb, cc, dd, ee, F5, K5, in[0],  15);
 226        ROUND(ee, aa, bb, cc, dd, F5, K5, in[5],   5);
 227        ROUND(dd, ee, aa, bb, cc, F5, K5, in[9],  11);
 228        ROUND(cc, dd, ee, aa, bb, F5, K5, in[7],   6);
 229        ROUND(bb, cc, dd, ee, aa, F5, K5, in[12],  8);
 230        ROUND(aa, bb, cc, dd, ee, F5, K5, in[2],  13);
 231        ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
 232        ROUND(dd, ee, aa, bb, cc, F5, K5, in[14],  5);
 233        ROUND(cc, dd, ee, aa, bb, F5, K5, in[1],  12);
 234        ROUND(bb, cc, dd, ee, aa, F5, K5, in[3],  13);
 235        ROUND(aa, bb, cc, dd, ee, F5, K5, in[8],  14);
 236        ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
 237        ROUND(dd, ee, aa, bb, cc, F5, K5, in[6],   8);
 238        ROUND(cc, dd, ee, aa, bb, F5, K5, in[15],  5);
 239        ROUND(bb, cc, dd, ee, aa, F5, K5, in[13],  6);
 240
 241        /* round 5: right lane */
 242        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12],  8);
 243        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15],  5);
 244        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
 245        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4],   9);
 246        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1],  12);
 247        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5],   5);
 248        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8],  14);
 249        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7],   6);
 250        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6],   8);
 251        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2],  13);
 252        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13],  6);
 253        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14],  5);
 254        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0],  15);
 255        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3],  13);
 256        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9],  11);
 257        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
 258
 259        /* Swap contents of "e" registers */
 260        swap(ee, eee);
 261
 262        /* combine results */
 263        state[0] += aa;
 264        state[1] += bb;
 265        state[2] += cc;
 266        state[3] += dd;
 267        state[4] += ee;
 268        state[5] += aaa;
 269        state[6] += bbb;
 270        state[7] += ccc;
 271        state[8] += ddd;
 272        state[9] += eee;
 273}
 274
 275static int rmd320_init(struct shash_desc *desc)
 276{
 277        struct rmd320_ctx *rctx = shash_desc_ctx(desc);
 278
 279        rctx->byte_count = 0;
 280
 281        rctx->state[0] = RMD_H0;
 282        rctx->state[1] = RMD_H1;
 283        rctx->state[2] = RMD_H2;
 284        rctx->state[3] = RMD_H3;
 285        rctx->state[4] = RMD_H4;
 286        rctx->state[5] = RMD_H5;
 287        rctx->state[6] = RMD_H6;
 288        rctx->state[7] = RMD_H7;
 289        rctx->state[8] = RMD_H8;
 290        rctx->state[9] = RMD_H9;
 291
 292        memset(rctx->buffer, 0, sizeof(rctx->buffer));
 293
 294        return 0;
 295}
 296
 297static int rmd320_update(struct shash_desc *desc, const u8 *data,
 298                         unsigned int len)
 299{
 300        struct rmd320_ctx *rctx = shash_desc_ctx(desc);
 301        const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
 302
 303        rctx->byte_count += len;
 304
 305        /* Enough space in buffer? If so copy and we're done */
 306        if (avail > len) {
 307                memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 308                       data, len);
 309                goto out;
 310        }
 311
 312        memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 313               data, avail);
 314
 315        rmd320_transform(rctx->state, rctx->buffer);
 316        data += avail;
 317        len -= avail;
 318
 319        while (len >= sizeof(rctx->buffer)) {
 320                memcpy(rctx->buffer, data, sizeof(rctx->buffer));
 321                rmd320_transform(rctx->state, rctx->buffer);
 322                data += sizeof(rctx->buffer);
 323                len -= sizeof(rctx->buffer);
 324        }
 325
 326        memcpy(rctx->buffer, data, len);
 327
 328out:
 329        return 0;
 330}
 331
 332/* Add padding and return the message digest. */
 333static int rmd320_final(struct shash_desc *desc, u8 *out)
 334{
 335        struct rmd320_ctx *rctx = shash_desc_ctx(desc);
 336        u32 i, index, padlen;
 337        __le64 bits;
 338        __le32 *dst = (__le32 *)out;
 339        static const u8 padding[64] = { 0x80, };
 340
 341        bits = cpu_to_le64(rctx->byte_count << 3);
 342
 343        /* Pad out to 56 mod 64 */
 344        index = rctx->byte_count & 0x3f;
 345        padlen = (index < 56) ? (56 - index) : ((64+56) - index);
 346        rmd320_update(desc, padding, padlen);
 347
 348        /* Append length */
 349        rmd320_update(desc, (const u8 *)&bits, sizeof(bits));
 350
 351        /* Store state in digest */
 352        for (i = 0; i < 10; i++)
 353                dst[i] = cpu_to_le32p(&rctx->state[i]);
 354
 355        /* Wipe context */
 356        memset(rctx, 0, sizeof(*rctx));
 357
 358        return 0;
 359}
 360
 361static struct shash_alg alg = {
 362        .digestsize     =       RMD320_DIGEST_SIZE,
 363        .init           =       rmd320_init,
 364        .update         =       rmd320_update,
 365        .final          =       rmd320_final,
 366        .descsize       =       sizeof(struct rmd320_ctx),
 367        .base           =       {
 368                .cra_name        =      "rmd320",
 369                .cra_driver_name =      "rmd320-generic",
 370                .cra_blocksize   =      RMD320_BLOCK_SIZE,
 371                .cra_module      =      THIS_MODULE,
 372        }
 373};
 374
 375static int __init rmd320_mod_init(void)
 376{
 377        return crypto_register_shash(&alg);
 378}
 379
 380static void __exit rmd320_mod_fini(void)
 381{
 382        crypto_unregister_shash(&alg);
 383}
 384
 385subsys_initcall(rmd320_mod_init);
 386module_exit(rmd320_mod_fini);
 387
 388MODULE_LICENSE("GPL");
 389MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
 390MODULE_DESCRIPTION("RIPEMD-320 Message Digest");
 391MODULE_ALIAS_CRYPTO("rmd320");
 392
Hosted by Missing Link Electronics. The original LXR software by the LXR community, this experimental version by lxr@linux.no.