1 /* $OpenBSD: rmd160.c,v 1.3 2001/09/26 21:40:13 markus Exp $ */ 2 /*- 3 * Copyright (c) 2001 Markus Friedl. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 /* 27 * Preneel, Bosselaers, Dobbertin, "The Cryptographic Hash Function RIPEMD-160", 28 * RSA Laboratories, CryptoBytes, Volume 3, Number 2, Autumn 1997, 29 * ftp://ftp.rsasecurity.com/pub/cryptobytes/crypto3n2.pdf 30 */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/endian.h> 35 #include <opencrypto/rmd160.h> 36 37 #define PUT_64BIT_LE(cp, value) do { \ 38 (cp)[7] = (value) >> 56; \ 39 (cp)[6] = (value) >> 48; \ 40 (cp)[5] = (value) >> 40; \ 41 (cp)[4] = (value) >> 32; \ 42 (cp)[3] = (value) >> 24; \ 43 (cp)[2] = (value) >> 16; \ 44 (cp)[1] = (value) >> 8; \ 45 (cp)[0] = (value); } while (0) 46 47 #define PUT_32BIT_LE(cp, value) do { \ 48 (cp)[3] = (value) >> 24; \ 49 (cp)[2] = (value) >> 16; \ 50 (cp)[1] = (value) >> 8; \ 51 (cp)[0] = (value); } while (0) 52 53 #define H0 0x67452301U 54 #define H1 0xEFCDAB89U 55 #define H2 0x98BADCFEU 56 #define H3 0x10325476U 57 #define H4 0xC3D2E1F0U 58 59 #define K0 0x00000000U 60 #define K1 0x5A827999U 61 #define K2 0x6ED9EBA1U 62 #define K3 0x8F1BBCDCU 63 #define K4 0xA953FD4EU 64 65 #define KK0 0x50A28BE6U 66 #define KK1 0x5C4DD124U 67 #define KK2 0x6D703EF3U 68 #define KK3 0x7A6D76E9U 69 #define KK4 0x00000000U 70 71 /* rotate x left n bits. */ 72 #define ROL(n, x) (((x) << (n)) | ((x) >> (32-(n)))) 73 74 #define F0(x, y, z) ((x) ^ (y) ^ (z)) 75 #define F1(x, y, z) (((x) & (y)) | ((~x) & (z))) 76 #define F2(x, y, z) (((x) | (~y)) ^ (z)) 77 #define F3(x, y, z) (((x) & (z)) | ((y) & (~z))) 78 #define F4(x, y, z) ((x) ^ ((y) | (~z))) 79 80 #define R(a, b, c, d, e, Fj, Kj, sj, rj) \ 81 do { \ 82 a = ROL(sj, a + Fj(b,c,d) + X(rj) + Kj) + e; \ 83 c = ROL(10, c); \ 84 } while(0) 85 86 #define X(i) x[i] 87 88 static u_char PADDING[64] = { 89 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 90 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 91 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 92 }; 93 94 void 95 RMD160Init(RMD160_CTX *ctx) 96 { 97 ctx->count = 0; 98 ctx->state[0] = H0; 99 ctx->state[1] = H1; 100 ctx->state[2] = H2; 101 ctx->state[3] = H3; 102 ctx->state[4] = H4; 103 } 104 105 void 106 RMD160Update(RMD160_CTX *ctx, const u_char *input, uint32_t len) 107 { 108 uint32_t have, off, need; 109 110 have = (ctx->count/8) % 64; 111 need = 64 - have; 112 ctx->count += 8 * len; 113 off = 0; 114 115 if (len >= need) { 116 if (have) { 117 memcpy(ctx->buffer + have, input, need); 118 RMD160Transform(ctx->state, ctx->buffer); 119 off = need; 120 have = 0; 121 } 122 /* now the buffer is empty */ 123 while (off + 64 <= len) { 124 RMD160Transform(ctx->state, input+off); 125 off += 64; 126 } 127 } 128 if (off < len) 129 memcpy(ctx->buffer + have, input+off, len-off); 130 } 131 132 void 133 RMD160Final(u_char digest[20], RMD160_CTX *ctx) 134 { 135 int i; 136 u_char size[8]; 137 uint32_t padlen; 138 139 PUT_64BIT_LE(size, ctx->count); 140 141 /* 142 * pad to 64 byte blocks, at least one byte from PADDING plus 8 bytes 143 * for the size 144 */ 145 padlen = 64 - ((ctx->count/8) % 64); 146 if (padlen < 1 + 8) 147 padlen += 64; 148 RMD160Update(ctx, PADDING, padlen - 8); /* padlen - 8 <= 64 */ 149 RMD160Update(ctx, size, 8); 150 151 if (digest != NULL) 152 for (i = 0; i < 5; i++) 153 PUT_32BIT_LE(digest + i*4, ctx->state[i]); 154 155 memset(ctx, 0, sizeof (*ctx)); 156 } 157 158 void 159 RMD160Transform(uint32_t state[5], const u_char block[64]) 160 { 161 uint32_t a, b, c, d, e, aa, bb, cc, dd, ee, t, x[16]; 162 163 #if BYTE_ORDER == LITTLE_ENDIAN 164 memcpy(x, block, 64); 165 #else 166 int i; 167 168 for (i = 0; i < 16; i++) 169 x[i] = bswap32(*(const uint32_t*)(block+i*4)); 170 #endif 171 172 a = state[0]; 173 b = state[1]; 174 c = state[2]; 175 d = state[3]; 176 e = state[4]; 177 178 /* Round 1 */ 179 R(a, b, c, d, e, F0, K0, 11, 0); 180 R(e, a, b, c, d, F0, K0, 14, 1); 181 R(d, e, a, b, c, F0, K0, 15, 2); 182 R(c, d, e, a, b, F0, K0, 12, 3); 183 R(b, c, d, e, a, F0, K0, 5, 4); 184 R(a, b, c, d, e, F0, K0, 8, 5); 185 R(e, a, b, c, d, F0, K0, 7, 6); 186 R(d, e, a, b, c, F0, K0, 9, 7); 187 R(c, d, e, a, b, F0, K0, 11, 8); 188 R(b, c, d, e, a, F0, K0, 13, 9); 189 R(a, b, c, d, e, F0, K0, 14, 10); 190 R(e, a, b, c, d, F0, K0, 15, 11); 191 R(d, e, a, b, c, F0, K0, 6, 12); 192 R(c, d, e, a, b, F0, K0, 7, 13); 193 R(b, c, d, e, a, F0, K0, 9, 14); 194 R(a, b, c, d, e, F0, K0, 8, 15); /* #15 */ 195 /* Round 2 */ 196 R(e, a, b, c, d, F1, K1, 7, 7); 197 R(d, e, a, b, c, F1, K1, 6, 4); 198 R(c, d, e, a, b, F1, K1, 8, 13); 199 R(b, c, d, e, a, F1, K1, 13, 1); 200 R(a, b, c, d, e, F1, K1, 11, 10); 201 R(e, a, b, c, d, F1, K1, 9, 6); 202 R(d, e, a, b, c, F1, K1, 7, 15); 203 R(c, d, e, a, b, F1, K1, 15, 3); 204 R(b, c, d, e, a, F1, K1, 7, 12); 205 R(a, b, c, d, e, F1, K1, 12, 0); 206 R(e, a, b, c, d, F1, K1, 15, 9); 207 R(d, e, a, b, c, F1, K1, 9, 5); 208 R(c, d, e, a, b, F1, K1, 11, 2); 209 R(b, c, d, e, a, F1, K1, 7, 14); 210 R(a, b, c, d, e, F1, K1, 13, 11); 211 R(e, a, b, c, d, F1, K1, 12, 8); /* #31 */ 212 /* Round 3 */ 213 R(d, e, a, b, c, F2, K2, 11, 3); 214 R(c, d, e, a, b, F2, K2, 13, 10); 215 R(b, c, d, e, a, F2, K2, 6, 14); 216 R(a, b, c, d, e, F2, K2, 7, 4); 217 R(e, a, b, c, d, F2, K2, 14, 9); 218 R(d, e, a, b, c, F2, K2, 9, 15); 219 R(c, d, e, a, b, F2, K2, 13, 8); 220 R(b, c, d, e, a, F2, K2, 15, 1); 221 R(a, b, c, d, e, F2, K2, 14, 2); 222 R(e, a, b, c, d, F2, K2, 8, 7); 223 R(d, e, a, b, c, F2, K2, 13, 0); 224 R(c, d, e, a, b, F2, K2, 6, 6); 225 R(b, c, d, e, a, F2, K2, 5, 13); 226 R(a, b, c, d, e, F2, K2, 12, 11); 227 R(e, a, b, c, d, F2, K2, 7, 5); 228 R(d, e, a, b, c, F2, K2, 5, 12); /* #47 */ 229 /* Round 4 */ 230 R(c, d, e, a, b, F3, K3, 11, 1); 231 R(b, c, d, e, a, F3, K3, 12, 9); 232 R(a, b, c, d, e, F3, K3, 14, 11); 233 R(e, a, b, c, d, F3, K3, 15, 10); 234 R(d, e, a, b, c, F3, K3, 14, 0); 235 R(c, d, e, a, b, F3, K3, 15, 8); 236 R(b, c, d, e, a, F3, K3, 9, 12); 237 R(a, b, c, d, e, F3, K3, 8, 4); 238 R(e, a, b, c, d, F3, K3, 9, 13); 239 R(d, e, a, b, c, F3, K3, 14, 3); 240 R(c, d, e, a, b, F3, K3, 5, 7); 241 R(b, c, d, e, a, F3, K3, 6, 15); 242 R(a, b, c, d, e, F3, K3, 8, 14); 243 R(e, a, b, c, d, F3, K3, 6, 5); 244 R(d, e, a, b, c, F3, K3, 5, 6); 245 R(c, d, e, a, b, F3, K3, 12, 2); /* #63 */ 246 /* Round 5 */ 247 R(b, c, d, e, a, F4, K4, 9, 4); 248 R(a, b, c, d, e, F4, K4, 15, 0); 249 R(e, a, b, c, d, F4, K4, 5, 5); 250 R(d, e, a, b, c, F4, K4, 11, 9); 251 R(c, d, e, a, b, F4, K4, 6, 7); 252 R(b, c, d, e, a, F4, K4, 8, 12); 253 R(a, b, c, d, e, F4, K4, 13, 2); 254 R(e, a, b, c, d, F4, K4, 12, 10); 255 R(d, e, a, b, c, F4, K4, 5, 14); 256 R(c, d, e, a, b, F4, K4, 12, 1); 257 R(b, c, d, e, a, F4, K4, 13, 3); 258 R(a, b, c, d, e, F4, K4, 14, 8); 259 R(e, a, b, c, d, F4, K4, 11, 11); 260 R(d, e, a, b, c, F4, K4, 8, 6); 261 R(c, d, e, a, b, F4, K4, 5, 15); 262 R(b, c, d, e, a, F4, K4, 6, 13); /* #79 */ 263 264 aa = a ; bb = b; cc = c; dd = d; ee = e; 265 266 a = state[0]; 267 b = state[1]; 268 c = state[2]; 269 d = state[3]; 270 e = state[4]; 271 272 /* Parallel round 1 */ 273 R(a, b, c, d, e, F4, KK0, 8, 5); 274 R(e, a, b, c, d, F4, KK0, 9, 14); 275 R(d, e, a, b, c, F4, KK0, 9, 7); 276 R(c, d, e, a, b, F4, KK0, 11, 0); 277 R(b, c, d, e, a, F4, KK0, 13, 9); 278 R(a, b, c, d, e, F4, KK0, 15, 2); 279 R(e, a, b, c, d, F4, KK0, 15, 11); 280 R(d, e, a, b, c, F4, KK0, 5, 4); 281 R(c, d, e, a, b, F4, KK0, 7, 13); 282 R(b, c, d, e, a, F4, KK0, 7, 6); 283 R(a, b, c, d, e, F4, KK0, 8, 15); 284 R(e, a, b, c, d, F4, KK0, 11, 8); 285 R(d, e, a, b, c, F4, KK0, 14, 1); 286 R(c, d, e, a, b, F4, KK0, 14, 10); 287 R(b, c, d, e, a, F4, KK0, 12, 3); 288 R(a, b, c, d, e, F4, KK0, 6, 12); /* #15 */ 289 /* Parallel round 2 */ 290 R(e, a, b, c, d, F3, KK1, 9, 6); 291 R(d, e, a, b, c, F3, KK1, 13, 11); 292 R(c, d, e, a, b, F3, KK1, 15, 3); 293 R(b, c, d, e, a, F3, KK1, 7, 7); 294 R(a, b, c, d, e, F3, KK1, 12, 0); 295 R(e, a, b, c, d, F3, KK1, 8, 13); 296 R(d, e, a, b, c, F3, KK1, 9, 5); 297 R(c, d, e, a, b, F3, KK1, 11, 10); 298 R(b, c, d, e, a, F3, KK1, 7, 14); 299 R(a, b, c, d, e, F3, KK1, 7, 15); 300 R(e, a, b, c, d, F3, KK1, 12, 8); 301 R(d, e, a, b, c, F3, KK1, 7, 12); 302 R(c, d, e, a, b, F3, KK1, 6, 4); 303 R(b, c, d, e, a, F3, KK1, 15, 9); 304 R(a, b, c, d, e, F3, KK1, 13, 1); 305 R(e, a, b, c, d, F3, KK1, 11, 2); /* #31 */ 306 /* Parallel round 3 */ 307 R(d, e, a, b, c, F2, KK2, 9, 15); 308 R(c, d, e, a, b, F2, KK2, 7, 5); 309 R(b, c, d, e, a, F2, KK2, 15, 1); 310 R(a, b, c, d, e, F2, KK2, 11, 3); 311 R(e, a, b, c, d, F2, KK2, 8, 7); 312 R(d, e, a, b, c, F2, KK2, 6, 14); 313 R(c, d, e, a, b, F2, KK2, 6, 6); 314 R(b, c, d, e, a, F2, KK2, 14, 9); 315 R(a, b, c, d, e, F2, KK2, 12, 11); 316 R(e, a, b, c, d, F2, KK2, 13, 8); 317 R(d, e, a, b, c, F2, KK2, 5, 12); 318 R(c, d, e, a, b, F2, KK2, 14, 2); 319 R(b, c, d, e, a, F2, KK2, 13, 10); 320 R(a, b, c, d, e, F2, KK2, 13, 0); 321 R(e, a, b, c, d, F2, KK2, 7, 4); 322 R(d, e, a, b, c, F2, KK2, 5, 13); /* #47 */ 323 /* Parallel round 4 */ 324 R(c, d, e, a, b, F1, KK3, 15, 8); 325 R(b, c, d, e, a, F1, KK3, 5, 6); 326 R(a, b, c, d, e, F1, KK3, 8, 4); 327 R(e, a, b, c, d, F1, KK3, 11, 1); 328 R(d, e, a, b, c, F1, KK3, 14, 3); 329 R(c, d, e, a, b, F1, KK3, 14, 11); 330 R(b, c, d, e, a, F1, KK3, 6, 15); 331 R(a, b, c, d, e, F1, KK3, 14, 0); 332 R(e, a, b, c, d, F1, KK3, 6, 5); 333 R(d, e, a, b, c, F1, KK3, 9, 12); 334 R(c, d, e, a, b, F1, KK3, 12, 2); 335 R(b, c, d, e, a, F1, KK3, 9, 13); 336 R(a, b, c, d, e, F1, KK3, 12, 9); 337 R(e, a, b, c, d, F1, KK3, 5, 7); 338 R(d, e, a, b, c, F1, KK3, 15, 10); 339 R(c, d, e, a, b, F1, KK3, 8, 14); /* #63 */ 340 /* Parallel round 5 */ 341 R(b, c, d, e, a, F0, KK4, 8, 12); 342 R(a, b, c, d, e, F0, KK4, 5, 15); 343 R(e, a, b, c, d, F0, KK4, 12, 10); 344 R(d, e, a, b, c, F0, KK4, 9, 4); 345 R(c, d, e, a, b, F0, KK4, 12, 1); 346 R(b, c, d, e, a, F0, KK4, 5, 5); 347 R(a, b, c, d, e, F0, KK4, 14, 8); 348 R(e, a, b, c, d, F0, KK4, 6, 7); 349 R(d, e, a, b, c, F0, KK4, 8, 6); 350 R(c, d, e, a, b, F0, KK4, 13, 2); 351 R(b, c, d, e, a, F0, KK4, 6, 13); 352 R(a, b, c, d, e, F0, KK4, 5, 14); 353 R(e, a, b, c, d, F0, KK4, 15, 0); 354 R(d, e, a, b, c, F0, KK4, 13, 3); 355 R(c, d, e, a, b, F0, KK4, 11, 9); 356 R(b, c, d, e, a, F0, KK4, 11, 11); /* #79 */ 357 358 t = state[1] + cc + d; 359 state[1] = state[2] + dd + e; 360 state[2] = state[3] + ee + a; 361 state[3] = state[4] + aa + b; 362 state[4] = state[0] + bb + c; 363 state[0] = t; 364 } 365