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"); 368