1/* 2 * Cryptographic API. 3 * 4 * RIPEMD-128 - 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 25struct rmd128_ctx { 26 u64 byte_count; 27 u32 state[4]; 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 rmd128_transform(u32 *state, const __le32 *in) 51{ 52 u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd; 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[0]; 62 bbb = state[1]; 63 ccc = state[2]; 64 ddd = state[3]; 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 2: left lane */ 85 ROUND(aa, bb, cc, dd, F2, K2, in[7], 7); 86 ROUND(dd, aa, bb, cc, F2, K2, in[4], 6); 87 ROUND(cc, dd, aa, bb, F2, K2, in[13], 8); 88 ROUND(bb, cc, dd, aa, F2, K2, in[1], 13); 89 ROUND(aa, bb, cc, dd, F2, K2, in[10], 11); 90 ROUND(dd, aa, bb, cc, F2, K2, in[6], 9); 91 ROUND(cc, dd, aa, bb, F2, K2, in[15], 7); 92 ROUND(bb, cc, dd, aa, F2, K2, in[3], 15); 93 ROUND(aa, bb, cc, dd, F2, K2, in[12], 7); 94 ROUND(dd, aa, bb, cc, F2, K2, in[0], 12); 95 ROUND(cc, dd, aa, bb, F2, K2, in[9], 15); 96 ROUND(bb, cc, dd, aa, F2, K2, in[5], 9); 97 ROUND(aa, bb, cc, dd, F2, K2, in[2], 11); 98 ROUND(dd, aa, bb, cc, F2, K2, in[14], 7); 99 ROUND(cc, dd, aa, bb, F2, K2, in[11], 13); 100 ROUND(bb, cc, dd, aa, F2, K2, in[8], 12); 101 102 /* round 3: left lane */ 103 ROUND(aa, bb, cc, dd, F3, K3, in[3], 11); 104 ROUND(dd, aa, bb, cc, F3, K3, in[10], 13); 105 ROUND(cc, dd, aa, bb, F3, K3, in[14], 6); 106 ROUND(bb, cc, dd, aa, F3, K3, in[4], 7); 107 ROUND(aa, bb, cc, dd, F3, K3, in[9], 14); 108 ROUND(dd, aa, bb, cc, F3, K3, in[15], 9); 109 ROUND(cc, dd, aa, bb, F3, K3, in[8], 13); 110 ROUND(bb, cc, dd, aa, F3, K3, in[1], 15); 111 ROUND(aa, bb, cc, dd, F3, K3, in[2], 14); 112 ROUND(dd, aa, bb, cc, F3, K3, in[7], 8); 113 ROUND(cc, dd, aa, bb, F3, K3, in[0], 13); 114 ROUND(bb, cc, dd, aa, F3, K3, in[6], 6); 115 ROUND(aa, bb, cc, dd, F3, K3, in[13], 5); 116 ROUND(dd, aa, bb, cc, F3, K3, in[11], 12); 117 ROUND(cc, dd, aa, bb, F3, K3, in[5], 7); 118 ROUND(bb, cc, dd, aa, F3, K3, in[12], 5); 119 120 /* round 4: left lane */ 121 ROUND(aa, bb, cc, dd, F4, K4, in[1], 11); 122 ROUND(dd, aa, bb, cc, F4, K4, in[9], 12); 123 ROUND(cc, dd, aa, bb, F4, K4, in[11], 14); 124 ROUND(bb, cc, dd, aa, F4, K4, in[10], 15); 125 ROUND(aa, bb, cc, dd, F4, K4, in[0], 14); 126 ROUND(dd, aa, bb, cc, F4, K4, in[8], 15); 127 ROUND(cc, dd, aa, bb, F4, K4, in[12], 9); 128 ROUND(bb, cc, dd, aa, F4, K4, in[4], 8); 129 ROUND(aa, bb, cc, dd, F4, K4, in[13], 9); 130 ROUND(dd, aa, bb, cc, F4, K4, in[3], 14); 131 ROUND(cc, dd, aa, bb, F4, K4, in[7], 5); 132 ROUND(bb, cc, dd, aa, F4, K4, in[15], 6); 133 ROUND(aa, bb, cc, dd, F4, K4, in[14], 8); 134 ROUND(dd, aa, bb, cc, F4, K4, in[5], 6); 135 ROUND(cc, dd, aa, bb, F4, K4, in[6], 5); 136 ROUND(bb, cc, dd, aa, F4, K4, in[2], 12); 137 138 /* round 1: right lane */ 139 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8); 140 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9); 141 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9); 142 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11); 143 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13); 144 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15); 145 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15); 146 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5); 147 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7); 148 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7); 149 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8); 150 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11); 151 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14); 152 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14); 153 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12); 154 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6); 155 156 /* round 2: right lane */ 157 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9); 158 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13); 159 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15); 160 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7); 161 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12); 162 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8); 163 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9); 164 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11); 165 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7); 166 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7); 167 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12); 168 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7); 169 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6); 170 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15); 171 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13); 172 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11); 173 174 /* round 3: right lane */ 175 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9); 176 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7); 177 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15); 178 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11); 179 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8); 180 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6); 181 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6); 182 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14); 183 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12); 184 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13); 185 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5); 186 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14); 187 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13); 188 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13); 189 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7); 190 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5); 191 192 /* round 4: right lane */ 193 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15); 194 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5); 195 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8); 196 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11); 197 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14); 198 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14); 199 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6); 200 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14); 201 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6); 202 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9); 203 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12); 204 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9); 205 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12); 206 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5); 207 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15); 208 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8); 209 210 /* combine results */ 211 ddd += cc + state[1]; /* final result for state[0] */ 212 state[1] = state[2] + dd + aaa; 213 state[2] = state[3] + aa + bbb; 214 state[3] = state[0] + bb + ccc; 215 state[0] = ddd; 216 217 return; 218} 219 220static int rmd128_init(struct shash_desc *desc) 221{ 222 struct rmd128_ctx *rctx = shash_desc_ctx(desc); 223 224 rctx->byte_count = 0; 225 226 rctx->state[0] = RMD_H0; 227 rctx->state[1] = RMD_H1; 228 rctx->state[2] = RMD_H2; 229 rctx->state[3] = RMD_H3; 230 231 memset(rctx->buffer, 0, sizeof(rctx->buffer)); 232 233 return 0; 234} 235 236static int rmd128_update(struct shash_desc *desc, const u8 *data, 237 unsigned int len) 238{ 239 struct rmd128_ctx *rctx = shash_desc_ctx(desc); 240 const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); 241 242 rctx->byte_count += len; 243 244 /* Enough space in buffer? If so copy and we're done */ 245 if (avail > len) { 246 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), 247 data, len); 248 goto out; 249 } 250 251 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), 252 data, avail); 253 254 rmd128_transform(rctx->state, rctx->buffer); 255 data += avail; 256 len -= avail; 257 258 while (len >= sizeof(rctx->buffer)) { 259 memcpy(rctx->buffer, data, sizeof(rctx->buffer)); 260 rmd128_transform(rctx->state, rctx->buffer); 261 data += sizeof(rctx->buffer); 262 len -= sizeof(rctx->buffer); 263 } 264 265 memcpy(rctx->buffer, data, len); 266 267out: 268 return 0; 269} 270 271/* Add padding and return the message digest. */ 272static int rmd128_final(struct shash_desc *desc, u8 *out) 273{ 274 struct rmd128_ctx *rctx = shash_desc_ctx(desc); 275 u32 i, index, padlen; 276 __le64 bits; 277 __le32 *dst = (__le32 *)out; 278 static const u8 padding[64] = { 0x80, }; 279 280 bits = cpu_to_le64(rctx->byte_count << 3); 281 282 /* Pad out to 56 mod 64 */ 283 index = rctx->byte_count & 0x3f; 284 padlen = (index < 56) ? (56 - index) : ((64+56) - index); 285 rmd128_update(desc, padding, padlen); 286 287 /* Append length */ 288 rmd128_update(desc, (const u8 *)&bits, sizeof(bits)); 289 290 /* Store state in digest */ 291 for (i = 0; i < 4; i++) 292 dst[i] = cpu_to_le32p(&rctx->state[i]); 293 294 /* Wipe context */ 295 memset(rctx, 0, sizeof(*rctx)); 296 297 return 0; 298} 299 300static struct shash_alg alg = { 301 .digestsize = RMD128_DIGEST_SIZE, 302 .init = rmd128_init, 303 .update = rmd128_update, 304 .final = rmd128_final, 305 .descsize = sizeof(struct rmd128_ctx), 306 .base = { 307 .cra_name = "rmd128", 308 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 309 .cra_blocksize = RMD128_BLOCK_SIZE, 310 .cra_module = THIS_MODULE, 311 } 312}; 313 314static int __init rmd128_mod_init(void) 315{ 316 return crypto_register_shash(&alg); 317} 318 319static void __exit rmd128_mod_fini(void) 320{ 321 crypto_unregister_shash(&alg); 322} 323 324module_init(rmd128_mod_init); 325module_exit(rmd128_mod_fini); 326 327MODULE_LICENSE("GPL"); 328MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>"); 329MODULE_DESCRIPTION("RIPEMD-128 Message Digest"); 330