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 <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
  26 struct 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
  55 static 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
 283 static 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
 303 static 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. */
 336 static 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
 362 static 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
 377 static int __init rmd320_mod_init(void)
 378 {
 379         return crypto_register_alg(&alg);
 380 }
 381
 382 static void __exit rmd320_mod_fini(void)
 383 {
 384         crypto_unregister_alg(&alg);
 385 }
 386
 387 module_init(rmd320_mod_init);
 388 module_exit(rmd320_mod_fini);
 389
 390 MODULE_LICENSE("GPL");
 391 MODULE_DESCRIPTION("RIPEMD-320 Message Digest");
 392
 393 MODULE_ALIAS("rmd320");