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 <ken@codelabs.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 25 struct rmd160_ctx { 26 u64 byte_count; 27 u32 state[5]; 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 K5 RMD_K5 36 #define KK1 RMD_K6 37 #define KK2 RMD_K7 38 #define KK3 RMD_K8 39 #define KK4 RMD_K9 40 #define KK5 RMD_K1 41 42 #define F1(x, y, z) (x ^ y ^ z) /* XOR */ 43 #define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */ 44 #define F3(x, y, z) ((x | ~y) ^ z) 45 #define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */ 46 #define F5(x, y, z) (x ^ (y | ~z)) 47 48 #define ROUND(a, b, c, d, e, f, k, x, s) { \ 49 (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \ 50 (a) = rol32((a), (s)) + (e); \ 51 (c) = rol32((c), 10); \ 52 } 53 54 static void rmd160_transform(u32 *state, const __le32 *in) 55 { 56 u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee; 57 58 /* Initialize left lane */ 59 aa = state[0]; 60 bb = state[1]; 61 cc = state[2]; 62 dd = state[3]; 63 ee = state[4]; 64 65 /* Initialize right lane */ 66 aaa = state[0]; 67 bbb = state[1]; 68 ccc = state[2]; 69 ddd = state[3]; 70 eee = state[4]; 71 72 /* round 1: left lane */ 73 ROUND(aa, bb, cc, dd, ee, F1, K1, in[0], 11); 74 ROUND(ee, aa, bb, cc, dd, F1, K1, in[1], 14); 75 ROUND(dd, ee, aa, bb, cc, F1, K1, in[2], 15); 76 ROUND(cc, dd, ee, aa, bb, F1, K1, in[3], 12); 77 ROUND(bb, cc, dd, ee, aa, F1, K1, in[4], 5); 78 ROUND(aa, bb, cc, dd, ee, F1, K1, in[5], 8); 79 ROUND(ee, aa, bb, cc, dd, F1, K1, in[6], 7); 80 ROUND(dd, ee, aa, bb, cc, F1, K1, in[7], 9); 81 ROUND(cc, dd, ee, aa, bb, F1, K1, in[8], 11); 82 ROUND(bb, cc, dd, ee, aa, F1, K1, in[9], 13); 83 ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14); 84 ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15); 85 ROUND(dd, ee, aa, bb, cc, F1, K1, in[12], 6); 86 ROUND(cc, dd, ee, aa, bb, F1, K1, in[13], 7); 87 ROUND(bb, cc, dd, ee, aa, F1, K1, in[14], 9); 88 ROUND(aa, bb, cc, dd, ee, F1, K1, in[15], 8); 89 90 /* round 2: left lane" */ 91 ROUND(ee, aa, bb, cc, dd, F2, K2, in[7], 7); 92 ROUND(dd, ee, aa, bb, cc, F2, K2, in[4], 6); 93 ROUND(cc, dd, ee, aa, bb, F2, K2, in[13], 8); 94 ROUND(bb, cc, dd, ee, aa, F2, K2, in[1], 13); 95 ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11); 96 ROUND(ee, aa, bb, cc, dd, F2, K2, in[6], 9); 97 ROUND(dd, ee, aa, bb, cc, F2, K2, in[15], 7); 98 ROUND(cc, dd, ee, aa, bb, F2, K2, in[3], 15); 99 ROUND(bb, cc, dd, ee, aa, F2, K2, in[12], 7); 100 ROUND(aa, bb, cc, dd, ee, F2, K2, in[0], 12); 101 ROUND(ee, aa, bb, cc, dd, F2, K2, in[9], 15); 102 ROUND(dd, ee, aa, bb, cc, F2, K2, in[5], 9); 103 ROUND(cc, dd, ee, aa, bb, F2, K2, in[2], 11); 104 ROUND(bb, cc, dd, ee, aa, F2, K2, in[14], 7); 105 ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13); 106 ROUND(ee, aa, bb, cc, dd, F2, K2, in[8], 12); 107 108 /* round 3: left lane" */ 109 ROUND(dd, ee, aa, bb, cc, F3, K3, in[3], 11); 110 ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13); 111 ROUND(bb, cc, dd, ee, aa, F3, K3, in[14], 6); 112 ROUND(aa, bb, cc, dd, ee, F3, K3, in[4], 7); 113 ROUND(ee, aa, bb, cc, dd, F3, K3, in[9], 14); 114 ROUND(dd, ee, aa, bb, cc, F3, K3, in[15], 9); 115 ROUND(cc, dd, ee, aa, bb, F3, K3, in[8], 13); 116 ROUND(bb, cc, dd, ee, aa, F3, K3, in[1], 15); 117 ROUND(aa, bb, cc, dd, ee, F3, K3, in[2], 14); 118 ROUND(ee, aa, bb, cc, dd, F3, K3, in[7], 8); 119 ROUND(dd, ee, aa, bb, cc, F3, K3, in[0], 13); 120 ROUND(cc, dd, ee, aa, bb, F3, K3, in[6], 6); 121 ROUND(bb, cc, dd, ee, aa, F3, K3, in[13], 5); 122 ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12); 123 ROUND(ee, aa, bb, cc, dd, F3, K3, in[5], 7); 124 ROUND(dd, ee, aa, bb, cc, F3, K3, in[12], 5); 125 126 /* round 4: left lane" */ 127 ROUND(cc, dd, ee, aa, bb, F4, K4, in[1], 11); 128 ROUND(bb, cc, dd, ee, aa, F4, K4, in[9], 12); 129 ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14); 130 ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15); 131 ROUND(dd, ee, aa, bb, cc, F4, K4, in[0], 14); 132 ROUND(cc, dd, ee, aa, bb, F4, K4, in[8], 15); 133 ROUND(bb, cc, dd, ee, aa, F4, K4, in[12], 9); 134 ROUND(aa, bb, cc, dd, ee, F4, K4, in[4], 8); 135 ROUND(ee, aa, bb, cc, dd, F4, K4, in[13], 9); 136 ROUND(dd, ee, aa, bb, cc, F4, K4, in[3], 14); 137 ROUND(cc, dd, ee, aa, bb, F4, K4, in[7], 5); 138 ROUND(bb, cc, dd, ee, aa, F4, K4, in[15], 6); 139 ROUND(aa, bb, cc, dd, ee, F4, K4, in[14], 8); 140 ROUND(ee, aa, bb, cc, dd, F4, K4, in[5], 6); 141 ROUND(dd, ee, aa, bb, cc, F4, K4, in[6], 5); 142 ROUND(cc, dd, ee, aa, bb, F4, K4, in[2], 12); 143 144 /* round 5: left lane" */ 145 ROUND(bb, cc, dd, ee, aa, F5, K5, in[4], 9); 146 ROUND(aa, bb, cc, dd, ee, F5, K5, in[0], 15); 147 ROUND(ee, aa, bb, cc, dd, F5, K5, in[5], 5); 148 ROUND(dd, ee, aa, bb, cc, F5, K5, in[9], 11); 149 ROUND(cc, dd, ee, aa, bb, F5, K5, in[7], 6); 150 ROUND(bb, cc, dd, ee, aa, F5, K5, in[12], 8); 151 ROUND(aa, bb, cc, dd, ee, F5, K5, in[2], 13); 152 ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12); 153 ROUND(dd, ee, aa, bb, cc, F5, K5, in[14], 5); 154 ROUND(cc, dd, ee, aa, bb, F5, K5, in[1], 12); 155 ROUND(bb, cc, dd, ee, aa, F5, K5, in[3], 13); 156 ROUND(aa, bb, cc, dd, ee, F5, K5, in[8], 14); 157 ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11); 158 ROUND(dd, ee, aa, bb, cc, F5, K5, in[6], 8); 159 ROUND(cc, dd, ee, aa, bb, F5, K5, in[15], 5); 160 ROUND(bb, cc, dd, ee, aa, F5, K5, in[13], 6); 161 162 /* round 1: right lane */ 163 ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5], 8); 164 ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14], 9); 165 ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7], 9); 166 ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0], 11); 167 ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9], 13); 168 ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2], 15); 169 ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15); 170 ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4], 5); 171 ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13], 7); 172 ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6], 7); 173 ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15], 8); 174 ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8], 11); 175 ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1], 14); 176 ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14); 177 ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3], 12); 178 ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12], 6); 179 180 /* round 2: right lane */ 181 ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6], 9); 182 ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13); 183 ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3], 15); 184 ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7], 7); 185 ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0], 12); 186 ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13], 8); 187 ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5], 9); 188 ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11); 189 ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14], 7); 190 ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15], 7); 191 ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8], 12); 192 ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12], 7); 193 ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4], 6); 194 ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9], 15); 195 ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1], 13); 196 ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2], 11); 197 198 /* round 3: right lane */ 199 ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15], 9); 200 ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5], 7); 201 ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1], 15); 202 ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3], 11); 203 ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7], 8); 204 ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14], 6); 205 ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6], 6); 206 ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9], 14); 207 ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12); 208 ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8], 13); 209 ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12], 5); 210 ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2], 14); 211 ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13); 212 ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0], 13); 213 ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4], 7); 214 ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13], 5); 215 216 /* round 4: right lane */ 217 ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8], 15); 218 ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6], 5); 219 ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4], 8); 220 ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1], 11); 221 ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3], 14); 222 ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14); 223 ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15], 6); 224 ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0], 14); 225 ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5], 6); 226 ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12], 9); 227 ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2], 12); 228 ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13], 9); 229 ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9], 12); 230 ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7], 5); 231 ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15); 232 ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14], 8); 233 234 /* round 5: right lane */ 235 ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12], 8); 236 ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15], 5); 237 ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12); 238 ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4], 9); 239 ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1], 12); 240 ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5], 5); 241 ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8], 14); 242 ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7], 6); 243 ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6], 8); 244 ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2], 13); 245 ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13], 6); 246 ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14], 5); 247 ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0], 15); 248 ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3], 13); 249 ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9], 11); 250 ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11); 251 252 /* combine results */ 253 ddd += cc + state[1]; /* final result for state[0] */ 254 state[1] = state[2] + dd + eee; 255 state[2] = state[3] + ee + aaa; 256 state[3] = state[4] + aa + bbb; 257 state[4] = state[0] + bb + ccc; 258 state[0] = ddd; 259 260 return; 261 } 262 263 static int rmd160_init(struct shash_desc *desc) 264 { 265 struct rmd160_ctx *rctx = shash_desc_ctx(desc); 266 267 rctx->byte_count = 0; 268 269 rctx->state[0] = RMD_H0; 270 rctx->state[1] = RMD_H1; 271 rctx->state[2] = RMD_H2; 272 rctx->state[3] = RMD_H3; 273 rctx->state[4] = RMD_H4; 274 275 memset(rctx->buffer, 0, sizeof(rctx->buffer)); 276 277 return 0; 278 } 279 280 static int rmd160_update(struct shash_desc *desc, const u8 *data, 281 unsigned int len) 282 { 283 struct rmd160_ctx *rctx = shash_desc_ctx(desc); 284 const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); 285 286 rctx->byte_count += len; 287 288 /* Enough space in buffer? If so copy and we're done */ 289 if (avail > len) { 290 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), 291 data, len); 292 goto out; 293 } 294 295 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), 296 data, avail); 297 298 rmd160_transform(rctx->state, rctx->buffer); 299 data += avail; 300 len -= avail; 301 302 while (len >= sizeof(rctx->buffer)) { 303 memcpy(rctx->buffer, data, sizeof(rctx->buffer)); 304 rmd160_transform(rctx->state, rctx->buffer); 305 data += sizeof(rctx->buffer); 306 len -= sizeof(rctx->buffer); 307 } 308 309 memcpy(rctx->buffer, data, len); 310 311 out: 312 return 0; 313 } 314 315 /* Add padding and return the message digest. */ 316 static int rmd160_final(struct shash_desc *desc, u8 *out) 317 { 318 struct rmd160_ctx *rctx = shash_desc_ctx(desc); 319 u32 i, index, padlen; 320 __le64 bits; 321 __le32 *dst = (__le32 *)out; 322 static const u8 padding[64] = { 0x80, }; 323 324 bits = cpu_to_le64(rctx->byte_count << 3); 325 326 /* Pad out to 56 mod 64 */ 327 index = rctx->byte_count & 0x3f; 328 padlen = (index < 56) ? (56 - index) : ((64+56) - index); 329 rmd160_update(desc, padding, padlen); 330 331 /* Append length */ 332 rmd160_update(desc, (const u8 *)&bits, sizeof(bits)); 333 334 /* Store state in digest */ 335 for (i = 0; i < 5; i++) 336 dst[i] = cpu_to_le32p(&rctx->state[i]); 337 338 /* Wipe context */ 339 memset(rctx, 0, sizeof(*rctx)); 340 341 return 0; 342 } 343 344 static struct shash_alg alg = { 345 .digestsize = RMD160_DIGEST_SIZE, 346 .init = rmd160_init, 347 .update = rmd160_update, 348 .final = rmd160_final, 349 .descsize = sizeof(struct rmd160_ctx), 350 .base = { 351 .cra_name = "rmd160", 352 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 353 .cra_blocksize = RMD160_BLOCK_SIZE, 354 .cra_module = THIS_MODULE, 355 } 356 }; 357 358 static int __init rmd160_mod_init(void) 359 { 360 return crypto_register_shash(&alg); 361 } 362 363 static void __exit rmd160_mod_fini(void) 364 { 365 crypto_unregister_shash(&alg); 366 } 367 368 module_init(rmd160_mod_init); 369 module_exit(rmd160_mod_fini); 370 371 MODULE_LICENSE("GPL"); 372 MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>"); 373 MODULE_DESCRIPTION("RIPEMD-160 Message Digest"); 374