LXR linux/crypto/rmd160.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Cryptographic API.
   4 *
   5 * RIPEMD-160 - 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 rmd160_ctx {
  21        u64 byte_count;
  22        u32 state[5];
  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 rmd160_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[0];
  62        bbb = state[1];
  63        ccc = state[2];
  64        ddd = state[3];
  65        eee = state[4];
  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 2: left lane" */
  86        ROUND(ee, aa, bb, cc, dd, F2, K2, in[7],   7);
  87        ROUND(dd, ee, aa, bb, cc, F2, K2, in[4],   6);
  88        ROUND(cc, dd, ee, aa, bb, F2, K2, in[13],  8);
  89        ROUND(bb, cc, dd, ee, aa, F2, K2, in[1],  13);
  90        ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
  91        ROUND(ee, aa, bb, cc, dd, F2, K2, in[6],   9);
  92        ROUND(dd, ee, aa, bb, cc, F2, K2, in[15],  7);
  93        ROUND(cc, dd, ee, aa, bb, F2, K2, in[3],  15);
  94        ROUND(bb, cc, dd, ee, aa, F2, K2, in[12],  7);
  95        ROUND(aa, bb, cc, dd, ee, F2, K2, in[0],  12);
  96        ROUND(ee, aa, bb, cc, dd, F2, K2, in[9],  15);
  97        ROUND(dd, ee, aa, bb, cc, F2, K2, in[5],   9);
  98        ROUND(cc, dd, ee, aa, bb, F2, K2, in[2],  11);
  99        ROUND(bb, cc, dd, ee, aa, F2, K2, in[14],  7);
 100        ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
 101        ROUND(ee, aa, bb, cc, dd, F2, K2, in[8],  12);
 102
 103        /* round 3: left lane" */
 104        ROUND(dd, ee, aa, bb, cc, F3, K3, in[3],  11);
 105        ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
 106        ROUND(bb, cc, dd, ee, aa, F3, K3, in[14],  6);
 107        ROUND(aa, bb, cc, dd, ee, F3, K3, in[4],   7);
 108        ROUND(ee, aa, bb, cc, dd, F3, K3, in[9],  14);
 109        ROUND(dd, ee, aa, bb, cc, F3, K3, in[15],  9);
 110        ROUND(cc, dd, ee, aa, bb, F3, K3, in[8],  13);
 111        ROUND(bb, cc, dd, ee, aa, F3, K3, in[1],  15);
 112        ROUND(aa, bb, cc, dd, ee, F3, K3, in[2],  14);
 113        ROUND(ee, aa, bb, cc, dd, F3, K3, in[7],   8);
 114        ROUND(dd, ee, aa, bb, cc, F3, K3, in[0],  13);
 115        ROUND(cc, dd, ee, aa, bb, F3, K3, in[6],   6);
 116        ROUND(bb, cc, dd, ee, aa, F3, K3, in[13],  5);
 117        ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
 118        ROUND(ee, aa, bb, cc, dd, F3, K3, in[5],   7);
 119        ROUND(dd, ee, aa, bb, cc, F3, K3, in[12],  5);
 120
 121        /* round 4: left lane" */
 122        ROUND(cc, dd, ee, aa, bb, F4, K4, in[1],  11);
 123        ROUND(bb, cc, dd, ee, aa, F4, K4, in[9],  12);
 124        ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
 125        ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
 126        ROUND(dd, ee, aa, bb, cc, F4, K4, in[0],  14);
 127        ROUND(cc, dd, ee, aa, bb, F4, K4, in[8],  15);
 128        ROUND(bb, cc, dd, ee, aa, F4, K4, in[12],  9);
 129        ROUND(aa, bb, cc, dd, ee, F4, K4, in[4],   8);
 130        ROUND(ee, aa, bb, cc, dd, F4, K4, in[13],  9);
 131        ROUND(dd, ee, aa, bb, cc, F4, K4, in[3],  14);
 132        ROUND(cc, dd, ee, aa, bb, F4, K4, in[7],   5);
 133        ROUND(bb, cc, dd, ee, aa, F4, K4, in[15],  6);
 134        ROUND(aa, bb, cc, dd, ee, F4, K4, in[14],  8);
 135        ROUND(ee, aa, bb, cc, dd, F4, K4, in[5],   6);
 136        ROUND(dd, ee, aa, bb, cc, F4, K4, in[6],   5);
 137        ROUND(cc, dd, ee, aa, bb, F4, K4, in[2],  12);
 138
 139        /* round 5: left lane" */
 140        ROUND(bb, cc, dd, ee, aa, F5, K5, in[4],   9);
 141        ROUND(aa, bb, cc, dd, ee, F5, K5, in[0],  15);
 142        ROUND(ee, aa, bb, cc, dd, F5, K5, in[5],   5);
 143        ROUND(dd, ee, aa, bb, cc, F5, K5, in[9],  11);
 144        ROUND(cc, dd, ee, aa, bb, F5, K5, in[7],   6);
 145        ROUND(bb, cc, dd, ee, aa, F5, K5, in[12],  8);
 146        ROUND(aa, bb, cc, dd, ee, F5, K5, in[2],  13);
 147        ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
 148        ROUND(dd, ee, aa, bb, cc, F5, K5, in[14],  5);
 149        ROUND(cc, dd, ee, aa, bb, F5, K5, in[1],  12);
 150        ROUND(bb, cc, dd, ee, aa, F5, K5, in[3],  13);
 151        ROUND(aa, bb, cc, dd, ee, F5, K5, in[8],  14);
 152        ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
 153        ROUND(dd, ee, aa, bb, cc, F5, K5, in[6],   8);
 154        ROUND(cc, dd, ee, aa, bb, F5, K5, in[15],  5);
 155        ROUND(bb, cc, dd, ee, aa, F5, K5, in[13],  6);
 156
 157        /* round 1: right lane */
 158        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5],   8);
 159        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14],  9);
 160        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7],   9);
 161        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0],  11);
 162        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9],  13);
 163        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2],  15);
 164        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
 165        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4],   5);
 166        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13],  7);
 167        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6],   7);
 168        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15],  8);
 169        ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8],  11);
 170        ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1],  14);
 171        ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
 172        ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3],  12);
 173        ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12],  6);
 174
 175        /* round 2: right lane */
 176        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6],   9);
 177        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
 178        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3],  15);
 179        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7],   7);
 180        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0],  12);
 181        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13],  8);
 182        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5],   9);
 183        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
 184        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14],  7);
 185        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15],  7);
 186        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8],  12);
 187        ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12],  7);
 188        ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4],   6);
 189        ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9],  15);
 190        ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1],  13);
 191        ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2],  11);
 192
 193        /* round 3: right lane */
 194        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15],  9);
 195        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5],   7);
 196        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1],  15);
 197        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3],  11);
 198        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7],   8);
 199        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14],  6);
 200        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6],   6);
 201        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9],  14);
 202        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
 203        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8],  13);
 204        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12],  5);
 205        ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2],  14);
 206        ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
 207        ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0],  13);
 208        ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4],   7);
 209        ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13],  5);
 210
 211        /* round 4: right lane */
 212        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8],  15);
 213        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6],   5);
 214        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4],   8);
 215        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1],  11);
 216        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3],  14);
 217        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14);
 218        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15],  6);
 219        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0],  14);
 220        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5],   6);
 221        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12],  9);
 222        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2],  12);
 223        ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13],  9);
 224        ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9],  12);
 225        ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7],   5);
 226        ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15);
 227        ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14],  8);
 228
 229        /* round 5: right lane */
 230        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12],  8);
 231        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15],  5);
 232        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
 233        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4],   9);
 234        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1],  12);
 235        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5],   5);
 236        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8],  14);
 237        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7],   6);
 238        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6],   8);
 239        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2],  13);
 240        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13],  6);
 241        ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14],  5);
 242        ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0],  15);
 243        ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3],  13);
 244        ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9],  11);
 245        ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
 246
 247        /* combine results */
 248        ddd += cc + state[1];           /* final result for state[0] */
 249        state[1] = state[2] + dd + eee;
 250        state[2] = state[3] + ee + aaa;
 251        state[3] = state[4] + aa + bbb;
 252        state[4] = state[0] + bb + ccc;
 253        state[0] = ddd;
 254}
 255
 256static int rmd160_init(struct shash_desc *desc)
 257{
 258        struct rmd160_ctx *rctx = shash_desc_ctx(desc);
 259
 260        rctx->byte_count = 0;
 261
 262        rctx->state[0] = RMD_H0;
 263        rctx->state[1] = RMD_H1;
 264        rctx->state[2] = RMD_H2;
 265        rctx->state[3] = RMD_H3;
 266        rctx->state[4] = RMD_H4;
 267
 268        memset(rctx->buffer, 0, sizeof(rctx->buffer));
 269
 270        return 0;
 271}
 272
 273static int rmd160_update(struct shash_desc *desc, const u8 *data,
 274                         unsigned int len)
 275{
 276        struct rmd160_ctx *rctx = shash_desc_ctx(desc);
 277        const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
 278
 279        rctx->byte_count += len;
 280
 281        /* Enough space in buffer? If so copy and we're done */
 282        if (avail > len) {
 283                memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 284                       data, len);
 285                goto out;
 286        }
 287
 288        memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 289               data, avail);
 290
 291        rmd160_transform(rctx->state, rctx->buffer);
 292        data += avail;
 293        len -= avail;
 294
 295        while (len >= sizeof(rctx->buffer)) {
 296                memcpy(rctx->buffer, data, sizeof(rctx->buffer));
 297                rmd160_transform(rctx->state, rctx->buffer);
 298                data += sizeof(rctx->buffer);
 299                len -= sizeof(rctx->buffer);
 300        }
 301
 302        memcpy(rctx->buffer, data, len);
 303
 304out:
 305        return 0;
 306}
 307
 308/* Add padding and return the message digest. */
 309static int rmd160_final(struct shash_desc *desc, u8 *out)
 310{
 311        struct rmd160_ctx *rctx = shash_desc_ctx(desc);
 312        u32 i, index, padlen;
 313        __le64 bits;
 314        __le32 *dst = (__le32 *)out;
 315        static const u8 padding[64] = { 0x80, };
 316
 317        bits = cpu_to_le64(rctx->byte_count << 3);
 318
 319        /* Pad out to 56 mod 64 */
 320        index = rctx->byte_count & 0x3f;
 321        padlen = (index < 56) ? (56 - index) : ((64+56) - index);
 322        rmd160_update(desc, padding, padlen);
 323
 324        /* Append length */
 325        rmd160_update(desc, (const u8 *)&bits, sizeof(bits));
 326
 327        /* Store state in digest */
 328        for (i = 0; i < 5; i++)
 329                dst[i] = cpu_to_le32p(&rctx->state[i]);
 330
 331        /* Wipe context */
 332        memset(rctx, 0, sizeof(*rctx));
 333
 334        return 0;
 335}
 336
 337static struct shash_alg alg = {
 338        .digestsize     =       RMD160_DIGEST_SIZE,
 339        .init           =       rmd160_init,
 340        .update         =       rmd160_update,
 341        .final          =       rmd160_final,
 342        .descsize       =       sizeof(struct rmd160_ctx),
 343        .base           =       {
 344                .cra_name        =      "rmd160",
 345                .cra_driver_name =      "rmd160-generic",
 346                .cra_blocksize   =      RMD160_BLOCK_SIZE,
 347                .cra_module      =      THIS_MODULE,
 348        }
 349};
 350
 351static int __init rmd160_mod_init(void)
 352{
 353        return crypto_register_shash(&alg);
 354}
 355
 356static void __exit rmd160_mod_fini(void)
 357{
 358        crypto_unregister_shash(&alg);
 359}
 360
 361subsys_initcall(rmd160_mod_init);
 362module_exit(rmd160_mod_fini);
 363
 364MODULE_LICENSE("GPL");
 365MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
 366MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
 367MODULE_ALIAS_CRYPTO("rmd160");
 368