crypto/rmd320.c

   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
  20 struct 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
  49 static 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
 275 static 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
 297 static 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
 328 out:
 329         return 0;
 330 }
 331
 332 /* Add padding and return the message digest. */
 333 static 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
 361 static 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
 375 static int __init rmd320_mod_init(void)
 376 {
 377         return crypto_register_shash(&alg);
 378 }
 379
 380 static void __exit rmd320_mod_fini(void)
 381 {
 382         crypto_unregister_shash(&alg);
 383 }
 384
 385 subsys_initcall(rmd320_mod_init);
 386 module_exit(rmd320_mod_fini);
 387
 388 MODULE_LICENSE("GPL");
 389 MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
 390 MODULE_DESCRIPTION("RIPEMD-320 Message Digest");
 391 MODULE_ALIAS_CRYPTO("rmd320");