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 <ken@codelabs.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 <crypto/internal/hash.h>
  17 #include <linux/init.h>
  18 #include <linux/module.h>
  19 #include <linux/mm.h>
  20 #include <linux/types.h>
  21 #include <asm/byteorder.h>
  22
  23 #include "ripemd.h"
  24
  25 struct rmd160_ctx {
  26         u64 byte_count;
  27         u32 state[5];
  28         __le32 buffer[16];
  29 };
  30
  31 #define K1  RMD_K1
  32 #define K2  RMD_K2
  33 #define K3  RMD_K3
  34 #define K4  RMD_K4
  35 #define K5  RMD_K5
  36 #define KK1 RMD_K6
  37 #define KK2 RMD_K7
  38 #define KK3 RMD_K8
  39 #define KK4 RMD_K9
  40 #define KK5 RMD_K1
  41
  42 #define F1(x, y, z) (x ^ y ^ z)         /* XOR */
  43 #define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
  44 #define F3(x, y, z) ((x | ~y) ^ z)
  45 #define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
  46 #define F5(x, y, z) (x ^ (y | ~z))
  47
  48 #define ROUND(a, b, c, d, e, f, k, x, s)  { \
  49         (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
  50         (a) = rol32((a), (s)) + (e); \
  51         (c) = rol32((c), 10); \
  52 }
  53
  54 static void rmd160_transform(u32 *state, const __le32 *in)
  55 {
  56         u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee;
  57
  58         /* Initialize left lane */
  59         aa = state[0];
  60         bb = state[1];
  61         cc = state[2];
  62         dd = state[3];
  63         ee = state[4];
  64
  65         /* Initialize right lane */
  66         aaa = state[0];
  67         bbb = state[1];
  68         ccc = state[2];
  69         ddd = state[3];
  70         eee = state[4];
  71
  72         /* round 1: left lane */
  73         ROUND(aa, bb, cc, dd, ee, F1, K1, in[0],  11);
  74         ROUND(ee, aa, bb, cc, dd, F1, K1, in[1],  14);
  75         ROUND(dd, ee, aa, bb, cc, F1, K1, in[2],  15);
  76         ROUND(cc, dd, ee, aa, bb, F1, K1, in[3],  12);
  77         ROUND(bb, cc, dd, ee, aa, F1, K1, in[4],   5);
  78         ROUND(aa, bb, cc, dd, ee, F1, K1, in[5],   8);
  79         ROUND(ee, aa, bb, cc, dd, F1, K1, in[6],   7);
  80         ROUND(dd, ee, aa, bb, cc, F1, K1, in[7],   9);
  81         ROUND(cc, dd, ee, aa, bb, F1, K1, in[8],  11);
  82         ROUND(bb, cc, dd, ee, aa, F1, K1, in[9],  13);
  83         ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14);
  84         ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15);
  85         ROUND(dd, ee, aa, bb, cc, F1, K1, in[12],  6);
  86         ROUND(cc, dd, ee, aa, bb, F1, K1, in[13],  7);
  87         ROUND(bb, cc, dd, ee, aa, F1, K1, in[14],  9);
  88         ROUND(aa, bb, cc, dd, ee, F1, K1, in[15],  8);
  89
  90         /* round 2: left lane" */
  91         ROUND(ee, aa, bb, cc, dd, F2, K2, in[7],   7);
  92         ROUND(dd, ee, aa, bb, cc, F2, K2, in[4],   6);
  93         ROUND(cc, dd, ee, aa, bb, F2, K2, in[13],  8);
  94         ROUND(bb, cc, dd, ee, aa, F2, K2, in[1],  13);
  95         ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
  96         ROUND(ee, aa, bb, cc, dd, F2, K2, in[6],   9);
  97         ROUND(dd, ee, aa, bb, cc, F2, K2, in[15],  7);
  98         ROUND(cc, dd, ee, aa, bb, F2, K2, in[3],  15);
  99         ROUND(bb, cc, dd, ee, aa, F2, K2, in[12],  7);
 100         ROUND(aa, bb, cc, dd, ee, F2, K2, in[0],  12);
 101         ROUND(ee, aa, bb, cc, dd, F2, K2, in[9],  15);
 102         ROUND(dd, ee, aa, bb, cc, F2, K2, in[5],   9);
 103         ROUND(cc, dd, ee, aa, bb, F2, K2, in[2],  11);
 104         ROUND(bb, cc, dd, ee, aa, F2, K2, in[14],  7);
 105         ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
 106         ROUND(ee, aa, bb, cc, dd, F2, K2, in[8],  12);
 107
 108         /* round 3: left lane" */
 109         ROUND(dd, ee, aa, bb, cc, F3, K3, in[3],  11);
 110         ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
 111         ROUND(bb, cc, dd, ee, aa, F3, K3, in[14],  6);
 112         ROUND(aa, bb, cc, dd, ee, F3, K3, in[4],   7);
 113         ROUND(ee, aa, bb, cc, dd, F3, K3, in[9],  14);
 114         ROUND(dd, ee, aa, bb, cc, F3, K3, in[15],  9);
 115         ROUND(cc, dd, ee, aa, bb, F3, K3, in[8],  13);
 116         ROUND(bb, cc, dd, ee, aa, F3, K3, in[1],  15);
 117         ROUND(aa, bb, cc, dd, ee, F3, K3, in[2],  14);
 118         ROUND(ee, aa, bb, cc, dd, F3, K3, in[7],   8);
 119         ROUND(dd, ee, aa, bb, cc, F3, K3, in[0],  13);
 120         ROUND(cc, dd, ee, aa, bb, F3, K3, in[6],   6);
 121         ROUND(bb, cc, dd, ee, aa, F3, K3, in[13],  5);
 122         ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
 123         ROUND(ee, aa, bb, cc, dd, F3, K3, in[5],   7);
 124         ROUND(dd, ee, aa, bb, cc, F3, K3, in[12],  5);
 125
 126         /* round 4: left lane" */
 127         ROUND(cc, dd, ee, aa, bb, F4, K4, in[1],  11);
 128         ROUND(bb, cc, dd, ee, aa, F4, K4, in[9],  12);
 129         ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
 130         ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
 131         ROUND(dd, ee, aa, bb, cc, F4, K4, in[0],  14);
 132         ROUND(cc, dd, ee, aa, bb, F4, K4, in[8],  15);
 133         ROUND(bb, cc, dd, ee, aa, F4, K4, in[12],  9);
 134         ROUND(aa, bb, cc, dd, ee, F4, K4, in[4],   8);
 135         ROUND(ee, aa, bb, cc, dd, F4, K4, in[13],  9);
 136         ROUND(dd, ee, aa, bb, cc, F4, K4, in[3],  14);
 137         ROUND(cc, dd, ee, aa, bb, F4, K4, in[7],   5);
 138         ROUND(bb, cc, dd, ee, aa, F4, K4, in[15],  6);
 139         ROUND(aa, bb, cc, dd, ee, F4, K4, in[14],  8);
 140         ROUND(ee, aa, bb, cc, dd, F4, K4, in[5],   6);
 141         ROUND(dd, ee, aa, bb, cc, F4, K4, in[6],   5);
 142         ROUND(cc, dd, ee, aa, bb, F4, K4, in[2],  12);
 143
 144         /* round 5: left lane" */
 145         ROUND(bb, cc, dd, ee, aa, F5, K5, in[4],   9);
 146         ROUND(aa, bb, cc, dd, ee, F5, K5, in[0],  15);
 147         ROUND(ee, aa, bb, cc, dd, F5, K5, in[5],   5);
 148         ROUND(dd, ee, aa, bb, cc, F5, K5, in[9],  11);
 149         ROUND(cc, dd, ee, aa, bb, F5, K5, in[7],   6);
 150         ROUND(bb, cc, dd, ee, aa, F5, K5, in[12],  8);
 151         ROUND(aa, bb, cc, dd, ee, F5, K5, in[2],  13);
 152         ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
 153         ROUND(dd, ee, aa, bb, cc, F5, K5, in[14],  5);
 154         ROUND(cc, dd, ee, aa, bb, F5, K5, in[1],  12);
 155         ROUND(bb, cc, dd, ee, aa, F5, K5, in[3],  13);
 156         ROUND(aa, bb, cc, dd, ee, F5, K5, in[8],  14);
 157         ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
 158         ROUND(dd, ee, aa, bb, cc, F5, K5, in[6],   8);
 159         ROUND(cc, dd, ee, aa, bb, F5, K5, in[15],  5);
 160         ROUND(bb, cc, dd, ee, aa, F5, K5, in[13],  6);
 161
 162         /* round 1: right lane */
 163         ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5],   8);
 164         ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14],  9);
 165         ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7],   9);
 166         ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0],  11);
 167         ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9],  13);
 168         ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2],  15);
 169         ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
 170         ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4],   5);
 171         ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13],  7);
 172         ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6],   7);
 173         ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15],  8);
 174         ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8],  11);
 175         ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1],  14);
 176         ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
 177         ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3],  12);
 178         ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12],  6);
 179
 180         /* round 2: right lane */
 181         ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6],   9);
 182         ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
 183         ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3],  15);
 184         ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7],   7);
 185         ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0],  12);
 186         ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13],  8);
 187         ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5],   9);
 188         ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
 189         ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14],  7);
 190         ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15],  7);
 191         ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8],  12);
 192         ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12],  7);
 193         ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4],   6);
 194         ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9],  15);
 195         ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1],  13);
 196         ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2],  11);
 197
 198         /* round 3: right lane */
 199         ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15],  9);
 200         ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5],   7);
 201         ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1],  15);
 202         ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3],  11);
 203         ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7],   8);
 204         ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14],  6);
 205         ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6],   6);
 206         ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9],  14);
 207         ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
 208         ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8],  13);
 209         ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12],  5);
 210         ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2],  14);
 211         ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
 212         ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0],  13);
 213         ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4],   7);
 214         ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13],  5);
 215
 216         /* round 4: right lane */
 217         ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8],  15);
 218         ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6],   5);
 219         ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4],   8);
 220         ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1],  11);
 221         ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3],  14);
 222         ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14);
 223         ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15],  6);
 224         ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0],  14);
 225         ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5],   6);
 226         ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12],  9);
 227         ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2],  12);
 228         ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13],  9);
 229         ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9],  12);
 230         ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7],   5);
 231         ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15);
 232         ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14],  8);
 233
 234         /* round 5: right lane */
 235         ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12],  8);
 236         ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15],  5);
 237         ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
 238         ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4],   9);
 239         ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1],  12);
 240         ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5],   5);
 241         ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8],  14);
 242         ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7],   6);
 243         ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6],   8);
 244         ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2],  13);
 245         ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13],  6);
 246         ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14],  5);
 247         ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0],  15);
 248         ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3],  13);
 249         ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9],  11);
 250         ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
 251
 252         /* combine results */
 253         ddd += cc + state[1];           /* final result for state[0] */
 254         state[1] = state[2] + dd + eee;
 255         state[2] = state[3] + ee + aaa;
 256         state[3] = state[4] + aa + bbb;
 257         state[4] = state[0] + bb + ccc;
 258         state[0] = ddd;
 259
 260         return;
 261 }
 262
 263 static int rmd160_init(struct shash_desc *desc)
 264 {
 265         struct rmd160_ctx *rctx = shash_desc_ctx(desc);
 266
 267         rctx->byte_count = 0;
 268
 269         rctx->state[0] = RMD_H0;
 270         rctx->state[1] = RMD_H1;
 271         rctx->state[2] = RMD_H2;
 272         rctx->state[3] = RMD_H3;
 273         rctx->state[4] = RMD_H4;
 274
 275         memset(rctx->buffer, 0, sizeof(rctx->buffer));
 276
 277         return 0;
 278 }
 279
 280 static int rmd160_update(struct shash_desc *desc, const u8 *data,
 281                          unsigned int len)
 282 {
 283         struct rmd160_ctx *rctx = shash_desc_ctx(desc);
 284         const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
 285
 286         rctx->byte_count += len;
 287
 288         /* Enough space in buffer? If so copy and we're done */
 289         if (avail > len) {
 290                 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 291                        data, len);
 292                 goto out;
 293         }
 294
 295         memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 296                data, avail);
 297
 298         rmd160_transform(rctx->state, rctx->buffer);
 299         data += avail;
 300         len -= avail;
 301
 302         while (len >= sizeof(rctx->buffer)) {
 303                 memcpy(rctx->buffer, data, sizeof(rctx->buffer));
 304                 rmd160_transform(rctx->state, rctx->buffer);
 305                 data += sizeof(rctx->buffer);
 306                 len -= sizeof(rctx->buffer);
 307         }
 308
 309         memcpy(rctx->buffer, data, len);
 310
 311 out:
 312         return 0;
 313 }
 314
 315 /* Add padding and return the message digest. */
 316 static int rmd160_final(struct shash_desc *desc, u8 *out)
 317 {
 318         struct rmd160_ctx *rctx = shash_desc_ctx(desc);
 319         u32 i, index, padlen;
 320         __le64 bits;
 321         __le32 *dst = (__le32 *)out;
 322         static const u8 padding[64] = { 0x80, };
 323
 324         bits = cpu_to_le64(rctx->byte_count << 3);
 325
 326         /* Pad out to 56 mod 64 */
 327         index = rctx->byte_count & 0x3f;
 328         padlen = (index < 56) ? (56 - index) : ((64+56) - index);
 329         rmd160_update(desc, padding, padlen);
 330
 331         /* Append length */
 332         rmd160_update(desc, (const u8 *)&bits, sizeof(bits));
 333
 334         /* Store state in digest */
 335         for (i = 0; i < 5; i++)
 336                 dst[i] = cpu_to_le32p(&rctx->state[i]);
 337
 338         /* Wipe context */
 339         memset(rctx, 0, sizeof(*rctx));
 340
 341         return 0;
 342 }
 343
 344 static struct shash_alg alg = {
 345         .digestsize     =       RMD160_DIGEST_SIZE,
 346         .init           =       rmd160_init,
 347         .update         =       rmd160_update,
 348         .final          =       rmd160_final,
 349         .descsize       =       sizeof(struct rmd160_ctx),
 350         .base           =       {
 351                 .cra_name        =      "rmd160",
 352                 .cra_flags       =      CRYPTO_ALG_TYPE_SHASH,
 353                 .cra_blocksize   =      RMD160_BLOCK_SIZE,
 354                 .cra_module      =      THIS_MODULE,
 355         }
 356 };
 357
 358 static int __init rmd160_mod_init(void)
 359 {
 360         return crypto_register_shash(&alg);
 361 }
 362
 363 static void __exit rmd160_mod_fini(void)
 364 {
 365         crypto_unregister_shash(&alg);
 366 }
 367
 368 module_init(rmd160_mod_init);
 369 module_exit(rmd160_mod_fini);
 370
 371 MODULE_LICENSE("GPL");
 372 MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
 373 MODULE_DESCRIPTION("RIPEMD-160 Message Digest");