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
  20 struct 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
  49 static 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
 256 static 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
 273 static 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
 304 out:
 305         return 0;
 306 }
 307
 308 /* Add padding and return the message digest. */
 309 static 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
 337 static 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
 351 static int __init rmd160_mod_init(void)
 352 {
 353         return crypto_register_shash(&alg);
 354 }
 355
 356 static void __exit rmd160_mod_fini(void)
 357 {
 358         crypto_unregister_shash(&alg);
 359 }
 360
 361 subsys_initcall(rmd160_mod_init);
 362 module_exit(rmd160_mod_fini);
 363
 364 MODULE_LICENSE("GPL");
 365 MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
 366 MODULE_DESCRIPTION("RIPEMD-160 Message Digest");
 367 MODULE_ALIAS_CRYPTO("rmd160");