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
  26 struct rmd160_ctx {
  27         u64 byte_count;
  28         u32 state[5];
  29         u32 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)) + (x) + (k); \
  51         (a) = rol32((a), (s)) + (e); \
  52         (c) = rol32((c), 10); \
  53 }
  54
  55 static void rmd160_transform(u32 *state, u32 const *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
 264 static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
 265 {
 266         while (words--) {
 267                 le32_to_cpus(buf);
 268                 buf++;
 269         }
 270 }
 271
 272 static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
 273 {
 274         while (words--) {
 275                 cpu_to_le32s(buf);
 276                 buf++;
 277         }
 278 }
 279
 280 static inline void rmd160_transform_helper(struct rmd160_ctx *ctx)
 281 {
 282         le32_to_cpu_array(ctx->buffer, sizeof(ctx->buffer) / sizeof(u32));
 283         rmd160_transform(ctx->state, ctx->buffer);
 284 }
 285
 286 static void rmd160_init(struct crypto_tfm *tfm)
 287 {
 288         struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm);
 289
 290         rctx->byte_count = 0;
 291
 292         rctx->state[0] = RMD_H0;
 293         rctx->state[1] = RMD_H1;
 294         rctx->state[2] = RMD_H2;
 295         rctx->state[3] = RMD_H3;
 296         rctx->state[4] = RMD_H4;
 297
 298         memset(rctx->buffer, 0, sizeof(rctx->buffer));
 299 }
 300
 301 static void rmd160_update(struct crypto_tfm *tfm, const u8 *data,
 302                           unsigned int len)
 303 {
 304         struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm);
 305         const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
 306
 307         rctx->byte_count += len;
 308
 309         /* Enough space in buffer? If so copy and we're done */
 310         if (avail > len) {
 311                 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 312                        data, len);
 313                 return;
 314         }
 315
 316         memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
 317                data, avail);
 318
 319         rmd160_transform_helper(rctx);
 320         data += avail;
 321         len -= avail;
 322
 323         while (len >= sizeof(rctx->buffer)) {
 324                 memcpy(rctx->buffer, data, sizeof(rctx->buffer));
 325                 rmd160_transform_helper(rctx);
 326                 data += sizeof(rctx->buffer);
 327                 len -= sizeof(rctx->buffer);
 328         }
 329
 330         memcpy(rctx->buffer, data, len);
 331 }
 332
 333 /* Add padding and return the message digest. */
 334 static void rmd160_final(struct crypto_tfm *tfm, u8 *out)
 335 {
 336         struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm);
 337         u32 index, padlen;
 338         u64 bits;
 339         static const u8 padding[64] = { 0x80, };
 340         bits = rctx->byte_count << 3;
 341
 342         /* Pad out to 56 mod 64 */
 343         index = rctx->byte_count & 0x3f;
 344         padlen = (index < 56) ? (56 - index) : ((64+56) - index);
 345         rmd160_update(tfm, padding, padlen);
 346
 347         /* Append length */
 348         rmd160_update(tfm, (const u8 *)&bits, sizeof(bits));
 349
 350         /* Store state in digest */
 351         memcpy(out, rctx->state, sizeof(rctx->state));
 352
 353         /* Wipe context */
 354         memset(rctx, 0, sizeof(*rctx));
 355 }
 356
 357 static struct crypto_alg alg = {
 358         .cra_name        =      "rmd160",
 359         .cra_driver_name =      "rmd160",
 360         .cra_flags       =      CRYPTO_ALG_TYPE_DIGEST,
 361         .cra_blocksize   =      RMD160_BLOCK_SIZE,
 362         .cra_ctxsize     =      sizeof(struct rmd160_ctx),
 363         .cra_module      =      THIS_MODULE,
 364         .cra_list        =      LIST_HEAD_INIT(alg.cra_list),
 365         .cra_u           =      { .digest = {
 366         .dia_digestsize  =      RMD160_DIGEST_SIZE,
 367         .dia_init        =      rmd160_init,
 368         .dia_update      =      rmd160_update,
 369         .dia_final       =      rmd160_final } }
 370 };
 371
 372 static int __init rmd160_mod_init(void)
 373 {
 374         return crypto_register_alg(&alg);
 375 }
 376
 377 static void __exit rmd160_mod_fini(void)
 378 {
 379         crypto_unregister_alg(&alg);
 380 }
 381
 382 module_init(rmd160_mod_init);
 383 module_exit(rmd160_mod_fini);
 384
 385 MODULE_LICENSE("GPL");
 386 MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
 387
 388 MODULE_ALIAS("rmd160");