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 __le32 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)) + le32_to_cpup(&(x)) + (k); \ 51 (a) = rol32((a), (s)) + (e); \ 52 (c) = rol32((c), 10); \ 53 } 54 55 static void rmd160_transform(u32 *state, const __le32 *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 void rmd160_init(struct crypto_tfm *tfm) 265 { 266 struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm); 267 268 rctx->byte_count = 0; 269 270 rctx->state[0] = RMD_H0; 271 rctx->state[1] = RMD_H1; 272 rctx->state[2] = RMD_H2; 273 rctx->state[3] = RMD_H3; 274 rctx->state[4] = RMD_H4; 275 276 memset(rctx->buffer, 0, sizeof(rctx->buffer)); 277 } 278 279 static void rmd160_update(struct crypto_tfm *tfm, const u8 *data, 280 unsigned int len) 281 { 282 struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm); 283 const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); 284 285 rctx->byte_count += len; 286 287 /* Enough space in buffer? If so copy and we're done */ 288 if (avail > len) { 289 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), 290 data, len); 291 return; 292 } 293 294 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), 295 data, avail); 296 297 rmd160_transform(rctx->state, rctx->buffer); 298 data += avail; 299 len -= avail; 300 301 while (len >= sizeof(rctx->buffer)) { 302 memcpy(rctx->buffer, data, sizeof(rctx->buffer)); 303 rmd160_transform(rctx->state, rctx->buffer); 304 data += sizeof(rctx->buffer); 305 len -= sizeof(rctx->buffer); 306 } 307 308 memcpy(rctx->buffer, data, len); 309 } 310 311 /* Add padding and return the message digest. */ 312 static void rmd160_final(struct crypto_tfm *tfm, u8 *out) 313 { 314 struct rmd160_ctx *rctx = crypto_tfm_ctx(tfm); 315 u32 i, index, padlen; 316 __le64 bits; 317 __le32 *dst = (__le32 *)out; 318 static const u8 padding[64] = { 0x80, }; 319 320 bits = cpu_to_le64(rctx->byte_count << 3); 321 322 /* Pad out to 56 mod 64 */ 323 index = rctx->byte_count & 0x3f; 324 padlen = (index < 56) ? (56 - index) : ((64+56) - index); 325 rmd160_update(tfm, padding, padlen); 326 327 /* Append length */ 328 rmd160_update(tfm, (const u8 *)&bits, sizeof(bits)); 329 330 /* Store state in digest */ 331 for (i = 0; i < 5; i++) 332 dst[i] = cpu_to_le32p(&rctx->state[i]); 333 334 /* Wipe context */ 335 memset(rctx, 0, sizeof(*rctx)); 336 } 337 338 static struct crypto_alg alg = { 339 .cra_name = "rmd160", 340 .cra_driver_name = "rmd160", 341 .cra_flags = CRYPTO_ALG_TYPE_DIGEST, 342 .cra_blocksize = RMD160_BLOCK_SIZE, 343 .cra_ctxsize = sizeof(struct rmd160_ctx), 344 .cra_module = THIS_MODULE, 345 .cra_list = LIST_HEAD_INIT(alg.cra_list), 346 .cra_u = { .digest = { 347 .dia_digestsize = RMD160_DIGEST_SIZE, 348 .dia_init = rmd160_init, 349 .dia_update = rmd160_update, 350 .dia_final = rmd160_final } } 351 }; 352 353 static int __init rmd160_mod_init(void) 354 { 355 return crypto_register_alg(&alg); 356 } 357 358 static void __exit rmd160_mod_fini(void) 359 { 360 crypto_unregister_alg(&alg); 361 } 362 363 module_init(rmd160_mod_init); 364 module_exit(rmd160_mod_fini); 365 366 MODULE_LICENSE("GPL"); 367 MODULE_DESCRIPTION("RIPEMD-160 Message Digest"); 368 369 MODULE_ALIAS("rmd160"); 370