1/* 2 * Cryptographic API. 3 * 4 * RIPEMD-256 - 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 <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 25struct rmd256_ctx { 26 u64 byte_count; 27 u32 state[8]; 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 KK1 RMD_K6 36#define KK2 RMD_K7 37#define KK3 RMD_K8 38#define KK4 RMD_K1 39 40#define F1(x, y, z) (x ^ y ^ z) /* XOR */ 41#define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */ 42#define F3(x, y, z) ((x | ~y) ^ z) 43#define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */ 44 45#define ROUND(a, b, c, d, f, k, x, s) { \ 46 (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \ 47 (a) = rol32((a), (s)); \ 48} 49 50static void rmd256_transform(u32 *state, const __le32 *in) 51{ 52 u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd, tmp; 53 54 /* Initialize left lane */ 55 aa = state[0]; 56 bb = state[1]; 57 cc = state[2]; 58 dd = state[3]; 59 60 /* Initialize right lane */ 61 aaa = state[4]; 62 bbb = state[5]; 63 ccc = state[6]; 64 ddd = state[7]; 65 66 /* round 1: left lane */ 67 ROUND(aa, bb, cc, dd, F1, K1, in[0], 11); 68 ROUND(dd, aa, bb, cc, F1, K1, in[1], 14); 69 ROUND(cc, dd, aa, bb, F1, K1, in[2], 15); 70 ROUND(bb, cc, dd, aa, F1, K1, in[3], 12); 71 ROUND(aa, bb, cc, dd, F1, K1, in[4], 5); 72 ROUND(dd, aa, bb, cc, F1, K1, in[5], 8); 73 ROUND(cc, dd, aa, bb, F1, K1, in[6], 7); 74 ROUND(bb, cc, dd, aa, F1, K1, in[7], 9); 75 ROUND(aa, bb, cc, dd, F1, K1, in[8], 11); 76 ROUND(dd, aa, bb, cc, F1, K1, in[9], 13); 77 ROUND(cc, dd, aa, bb, F1, K1, in[10], 14); 78 ROUND(bb, cc, dd, aa, F1, K1, in[11], 15); 79 ROUND(aa, bb, cc, dd, F1, K1, in[12], 6); 80 ROUND(dd, aa, bb, cc, F1, K1, in[13], 7); 81 ROUND(cc, dd, aa, bb, F1, K1, in[14], 9); 82 ROUND(bb, cc, dd, aa, F1, K1, in[15], 8); 83 84 /* round 1: right lane */ 85 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8); 86 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9); 87 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9); 88 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11); 89 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13); 90 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15); 91 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15); 92 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5); 93 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7); 94 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7); 95 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8); 96 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11); 97 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14); 98 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14); 99 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12); 100 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6); 101 102 /* Swap contents of "a" registers */ 103 tmp = aa; aa = aaa; aaa = tmp; 104 105 /* round 2: left lane */ 106 ROUND(aa, bb, cc, dd, F2, K2, in[7], 7); 107 ROUND(dd, aa, bb, cc, F2, K2, in[4], 6); 108 ROUND(cc, dd, aa, bb, F2, K2, in[13], 8); 109 ROUND(bb, cc, dd, aa, F2, K2, in[1], 13); 110 ROUND(aa, bb, cc, dd, F2, K2, in[10], 11); 111 ROUND(dd, aa, bb, cc, F2, K2, in[6], 9); 112 ROUND(cc, dd, aa, bb, F2, K2, in[15], 7); 113 ROUND(bb, cc, dd, aa, F2, K2, in[3], 15); 114 ROUND(aa, bb, cc, dd, F2, K2, in[12], 7); 115 ROUND(dd, aa, bb, cc, F2, K2, in[0], 12); 116 ROUND(cc, dd, aa, bb, F2, K2, in[9], 15); 117 ROUND(bb, cc, dd, aa, F2, K2, in[5], 9); 118 ROUND(aa, bb, cc, dd, F2, K2, in[2], 11); 119 ROUND(dd, aa, bb, cc, F2, K2, in[14], 7); 120 ROUND(cc, dd, aa, bb, F2, K2, in[11], 13); 121 ROUND(bb, cc, dd, aa, F2, K2, in[8], 12); 122 123 /* round 2: right lane */ 124 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9); 125 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13); 126 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15); 127 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7); 128 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12); 129 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8); 130 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9); 131 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11); 132 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7); 133 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7); 134 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12); 135 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7); 136 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6); 137 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15); 138 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13); 139 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11); 140 141 /* Swap contents of "b" registers */ 142 tmp = bb; bb = bbb; bbb = tmp; 143 144 /* round 3: left lane */ 145 ROUND(aa, bb, cc, dd, F3, K3, in[3], 11); 146 ROUND(dd, aa, bb, cc, F3, K3, in[10], 13); 147 ROUND(cc, dd, aa, bb, F3, K3, in[14], 6); 148 ROUND(bb, cc, dd, aa, F3, K3, in[4], 7); 149 ROUND(aa, bb, cc, dd, F3, K3, in[9], 14); 150 ROUND(dd, aa, bb, cc, F3, K3, in[15], 9); 151 ROUND(cc, dd, aa, bb, F3, K3, in[8], 13); 152 ROUND(bb, cc, dd, aa, F3, K3, in[1], 15); 153 ROUND(aa, bb, cc, dd, F3, K3, in[2], 14); 154 ROUND(dd, aa, bb, cc, F3, K3, in[7], 8); 155 ROUND(cc, dd, aa, bb, F3, K3, in[0], 13); 156 ROUND(bb, cc, dd, aa, F3, K3, in[6], 6); 157 ROUND(aa, bb, cc, dd, F3, K3, in[13], 5); 158 ROUND(dd, aa, bb, cc, F3, K3, in[11], 12); 159 ROUND(cc, dd, aa, bb, F3, K3, in[5], 7); 160 ROUND(bb, cc, dd, aa, F3, K3, in[12], 5); 161 162 /* round 3: right lane */ 163 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9); 164 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7); 165 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15); 166 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11); 167 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8); 168 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6); 169 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6); 170 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14); 171 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12); 172 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13); 173 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5); 174 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14); 175 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13); 176 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13); 177 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7); 178 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5); 179 180 /* Swap contents of "c" registers */ 181 tmp = cc; cc = ccc; ccc = tmp; 182 183 /* round 4: left lane */ 184 ROUND(aa, bb, cc, dd, F4, K4, in[1], 11); 185 ROUND(dd, aa, bb, cc, F4, K4, in[9], 12); 186 ROUND(cc, dd, aa, bb, F4, K4, in[11], 14); 187 ROUND(bb, cc, dd, aa, F4, K4, in[10], 15); 188 ROUND(aa, bb, cc, dd, F4, K4, in[0], 14); 189 ROUND(dd, aa, bb, cc, F4, K4, in[8], 15); 190 ROUND(cc, dd, aa, bb, F4, K4, in[12], 9); 191 ROUND(bb, cc, dd, aa, F4, K4, in[4], 8); 192 ROUND(aa, bb, cc, dd, F4, K4, in[13], 9); 193 ROUND(dd, aa, bb, cc, F4, K4, in[3], 14); 194 ROUND(cc, dd, aa, bb, F4, K4, in[7], 5); 195 ROUND(bb, cc, dd, aa, F4, K4, in[15], 6); 196 ROUND(aa, bb, cc, dd, F4, K4, in[14], 8); 197 ROUND(dd, aa, bb, cc, F4, K4, in[5], 6); 198 ROUND(cc, dd, aa, bb, F4, K4, in[6], 5); 199 ROUND(bb, cc, dd, aa, F4, K4, in[2], 12); 200 201 /* round 4: right lane */ 202 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15); 203 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5); 204 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8); 205 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11); 206 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14); 207 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14); 208 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6); 209 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14); 210 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6); 211 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9); 212 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12); 213 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9); 214 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12); 215 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5); 216 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15); 217 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8); 218 219 /* Swap contents of "d" registers */ 220 tmp = dd; dd = ddd; ddd = tmp; 221 222 /* combine results */ 223 state[0] += aa; 224 state[1] += bb; 225 state[2] += cc; 226 state[3] += dd; 227 state[4] += aaa; 228 state[5] += bbb; 229 state[6] += ccc; 230 state[7] += ddd; 231 232 return; 233} 234 235static int rmd256_init(struct shash_desc *desc) 236{ 237 struct rmd256_ctx *rctx = shash_desc_ctx(desc); 238 239 rctx->byte_count = 0; 240 241 rctx->state[0] = RMD_H0; 242 rctx->state[1] = RMD_H1; 243 rctx->state[2] = RMD_H2; 244 rctx->state[3] = RMD_H3; 245 rctx->state[4] = RMD_H5; 246 rctx->state[5] = RMD_H6; 247 rctx->state[6] = RMD_H7; 248 rctx->state[7] = RMD_H8; 249 250 memset(rctx->buffer, 0, sizeof(rctx->buffer)); 251 252 return 0; 253} 254 255static int rmd256_update(struct shash_desc *desc, const u8 *data, 256 unsigned int len) 257{ 258 struct rmd256_ctx *rctx = shash_desc_ctx(desc); 259 const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); 260 261 rctx->byte_count += len; 262 263 /* Enough space in buffer? If so copy and we're done */ 264 if (avail > len) { 265 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), 266 data, len); 267 goto out; 268 } 269 270 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), 271 data, avail); 272 273 rmd256_transform(rctx->state, rctx->buffer); 274 data += avail; 275 len -= avail; 276 277 while (len >= sizeof(rctx->buffer)) { 278 memcpy(rctx->buffer, data, sizeof(rctx->buffer)); 279 rmd256_transform(rctx->state, rctx->buffer); 280 data += sizeof(rctx->buffer); 281 len -= sizeof(rctx->buffer); 282 } 283 284 memcpy(rctx->buffer, data, len); 285 286out: 287 return 0; 288} 289 290/* Add padding and return the message digest. */ 291static int rmd256_final(struct shash_desc *desc, u8 *out) 292{ 293 struct rmd256_ctx *rctx = shash_desc_ctx(desc); 294 u32 i, index, padlen; 295 __le64 bits; 296 __le32 *dst = (__le32 *)out; 297 static const u8 padding[64] = { 0x80, }; 298 299 bits = cpu_to_le64(rctx->byte_count << 3); 300 301 /* Pad out to 56 mod 64 */ 302 index = rctx->byte_count & 0x3f; 303 padlen = (index < 56) ? (56 - index) : ((64+56) - index); 304 rmd256_update(desc, padding, padlen); 305 306 /* Append length */ 307 rmd256_update(desc, (const u8 *)&bits, sizeof(bits)); 308 309 /* Store state in digest */ 310 for (i = 0; i < 8; i++) 311 dst[i] = cpu_to_le32p(&rctx->state[i]); 312 313 /* Wipe context */ 314 memset(rctx, 0, sizeof(*rctx)); 315 316 return 0; 317} 318 319static struct shash_alg alg = { 320 .digestsize = RMD256_DIGEST_SIZE, 321 .init = rmd256_init, 322 .update = rmd256_update, 323 .final = rmd256_final, 324 .descsize = sizeof(struct rmd256_ctx), 325 .base = { 326 .cra_name = "rmd256", 327 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 328 .cra_blocksize = RMD256_BLOCK_SIZE, 329 .cra_module = THIS_MODULE, 330 } 331}; 332 333static int __init rmd256_mod_init(void) 334{ 335 return crypto_register_shash(&alg); 336} 337 338static void __exit rmd256_mod_fini(void) 339{ 340 crypto_unregister_shash(&alg); 341} 342 343module_init(rmd256_mod_init); 344module_exit(rmd256_mod_fini); 345 346MODULE_LICENSE("GPL"); 347MODULE_DESCRIPTION("RIPEMD-256 Message Digest"); 348