1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Cryptographic API. 4 * 5 * RIPEMD-128 - 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 20struct rmd128_ctx { 21 u64 byte_count; 22 u32 state[4]; 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 KK1 RMD_K6 31#define KK2 RMD_K7 32#define KK3 RMD_K8 33#define KK4 RMD_K1 34 35#define F1(x, y, z) (x ^ y ^ z) /* XOR */ 36#define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */ 37#define F3(x, y, z) ((x | ~y) ^ z) 38#define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */ 39 40#define ROUND(a, b, c, d, f, k, x, s) { \ 41 (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \ 42 (a) = rol32((a), (s)); \ 43} 44 45static void rmd128_transform(u32 *state, const __le32 *in) 46{ 47 u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd; 48 49 /* Initialize left lane */ 50 aa = state[0]; 51 bb = state[1]; 52 cc = state[2]; 53 dd = state[3]; 54 55 /* Initialize right lane */ 56 aaa = state[0]; 57 bbb = state[1]; 58 ccc = state[2]; 59 ddd = state[3]; 60 61 /* round 1: left lane */ 62 ROUND(aa, bb, cc, dd, F1, K1, in[0], 11); 63 ROUND(dd, aa, bb, cc, F1, K1, in[1], 14); 64 ROUND(cc, dd, aa, bb, F1, K1, in[2], 15); 65 ROUND(bb, cc, dd, aa, F1, K1, in[3], 12); 66 ROUND(aa, bb, cc, dd, F1, K1, in[4], 5); 67 ROUND(dd, aa, bb, cc, F1, K1, in[5], 8); 68 ROUND(cc, dd, aa, bb, F1, K1, in[6], 7); 69 ROUND(bb, cc, dd, aa, F1, K1, in[7], 9); 70 ROUND(aa, bb, cc, dd, F1, K1, in[8], 11); 71 ROUND(dd, aa, bb, cc, F1, K1, in[9], 13); 72 ROUND(cc, dd, aa, bb, F1, K1, in[10], 14); 73 ROUND(bb, cc, dd, aa, F1, K1, in[11], 15); 74 ROUND(aa, bb, cc, dd, F1, K1, in[12], 6); 75 ROUND(dd, aa, bb, cc, F1, K1, in[13], 7); 76 ROUND(cc, dd, aa, bb, F1, K1, in[14], 9); 77 ROUND(bb, cc, dd, aa, F1, K1, in[15], 8); 78 79 /* round 2: left lane */ 80 ROUND(aa, bb, cc, dd, F2, K2, in[7], 7); 81 ROUND(dd, aa, bb, cc, F2, K2, in[4], 6); 82 ROUND(cc, dd, aa, bb, F2, K2, in[13], 8); 83 ROUND(bb, cc, dd, aa, F2, K2, in[1], 13); 84 ROUND(aa, bb, cc, dd, F2, K2, in[10], 11); 85 ROUND(dd, aa, bb, cc, F2, K2, in[6], 9); 86 ROUND(cc, dd, aa, bb, F2, K2, in[15], 7); 87 ROUND(bb, cc, dd, aa, F2, K2, in[3], 15); 88 ROUND(aa, bb, cc, dd, F2, K2, in[12], 7); 89 ROUND(dd, aa, bb, cc, F2, K2, in[0], 12); 90 ROUND(cc, dd, aa, bb, F2, K2, in[9], 15); 91 ROUND(bb, cc, dd, aa, F2, K2, in[5], 9); 92 ROUND(aa, bb, cc, dd, F2, K2, in[2], 11); 93 ROUND(dd, aa, bb, cc, F2, K2, in[14], 7); 94 ROUND(cc, dd, aa, bb, F2, K2, in[11], 13); 95 ROUND(bb, cc, dd, aa, F2, K2, in[8], 12); 96 97 /* round 3: left lane */ 98 ROUND(aa, bb, cc, dd, F3, K3, in[3], 11); 99 ROUND(dd, aa, bb, cc, F3, K3, in[10], 13); 100 ROUND(cc, dd, aa, bb, F3, K3, in[14], 6); 101 ROUND(bb, cc, dd, aa, F3, K3, in[4], 7); 102 ROUND(aa, bb, cc, dd, F3, K3, in[9], 14); 103 ROUND(dd, aa, bb, cc, F3, K3, in[15], 9); 104 ROUND(cc, dd, aa, bb, F3, K3, in[8], 13); 105 ROUND(bb, cc, dd, aa, F3, K3, in[1], 15); 106 ROUND(aa, bb, cc, dd, F3, K3, in[2], 14); 107 ROUND(dd, aa, bb, cc, F3, K3, in[7], 8); 108 ROUND(cc, dd, aa, bb, F3, K3, in[0], 13); 109 ROUND(bb, cc, dd, aa, F3, K3, in[6], 6); 110 ROUND(aa, bb, cc, dd, F3, K3, in[13], 5); 111 ROUND(dd, aa, bb, cc, F3, K3, in[11], 12); 112 ROUND(cc, dd, aa, bb, F3, K3, in[5], 7); 113 ROUND(bb, cc, dd, aa, F3, K3, in[12], 5); 114 115 /* round 4: left lane */ 116 ROUND(aa, bb, cc, dd, F4, K4, in[1], 11); 117 ROUND(dd, aa, bb, cc, F4, K4, in[9], 12); 118 ROUND(cc, dd, aa, bb, F4, K4, in[11], 14); 119 ROUND(bb, cc, dd, aa, F4, K4, in[10], 15); 120 ROUND(aa, bb, cc, dd, F4, K4, in[0], 14); 121 ROUND(dd, aa, bb, cc, F4, K4, in[8], 15); 122 ROUND(cc, dd, aa, bb, F4, K4, in[12], 9); 123 ROUND(bb, cc, dd, aa, F4, K4, in[4], 8); 124 ROUND(aa, bb, cc, dd, F4, K4, in[13], 9); 125 ROUND(dd, aa, bb, cc, F4, K4, in[3], 14); 126 ROUND(cc, dd, aa, bb, F4, K4, in[7], 5); 127 ROUND(bb, cc, dd, aa, F4, K4, in[15], 6); 128 ROUND(aa, bb, cc, dd, F4, K4, in[14], 8); 129 ROUND(dd, aa, bb, cc, F4, K4, in[5], 6); 130 ROUND(cc, dd, aa, bb, F4, K4, in[6], 5); 131 ROUND(bb, cc, dd, aa, F4, K4, in[2], 12); 132 133 /* round 1: right lane */ 134 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8); 135 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9); 136 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9); 137 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11); 138 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13); 139 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15); 140 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15); 141 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5); 142 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7); 143 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7); 144 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8); 145 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11); 146 ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14); 147 ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14); 148 ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12); 149 ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6); 150 151 /* round 2: right lane */ 152 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9); 153 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13); 154 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15); 155 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7); 156 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12); 157 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8); 158 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9); 159 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11); 160 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7); 161 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7); 162 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12); 163 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7); 164 ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6); 165 ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15); 166 ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13); 167 ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11); 168 169 /* round 3: right lane */ 170 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9); 171 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7); 172 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15); 173 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11); 174 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8); 175 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6); 176 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6); 177 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14); 178 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12); 179 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13); 180 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5); 181 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14); 182 ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13); 183 ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13); 184 ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7); 185 ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5); 186 187 /* round 4: right lane */ 188 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15); 189 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5); 190 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8); 191 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11); 192 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14); 193 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14); 194 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6); 195 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14); 196 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6); 197 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9); 198 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12); 199 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9); 200 ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12); 201 ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5); 202 ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15); 203 ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8); 204 205 /* combine results */ 206 ddd += cc + state[1]; /* final result for state[0] */ 207 state[1] = state[2] + dd + aaa; 208 state[2] = state[3] + aa + bbb; 209 state[3] = state[0] + bb + ccc; 210 state[0] = ddd; 211} 212 213static int rmd128_init(struct shash_desc *desc) 214{ 215 struct rmd128_ctx *rctx = shash_desc_ctx(desc); 216 217 rctx->byte_count = 0; 218 219 rctx->state[0] = RMD_H0; 220 rctx->state[1] = RMD_H1; 221 rctx->state[2] = RMD_H2; 222 rctx->state[3] = RMD_H3; 223 224 memset(rctx->buffer, 0, sizeof(rctx->buffer)); 225 226 return 0; 227} 228 229static int rmd128_update(struct shash_desc *desc, const u8 *data, 230 unsigned int len) 231{ 232 struct rmd128_ctx *rctx = shash_desc_ctx(desc); 233 const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f); 234 235 rctx->byte_count += len; 236 237 /* Enough space in buffer? If so copy and we're done */ 238 if (avail > len) { 239 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), 240 data, len); 241 goto out; 242 } 243 244 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail), 245 data, avail); 246 247 rmd128_transform(rctx->state, rctx->buffer); 248 data += avail; 249 len -= avail; 250 251 while (len >= sizeof(rctx->buffer)) { 252 memcpy(rctx->buffer, data, sizeof(rctx->buffer)); 253 rmd128_transform(rctx->state, rctx->buffer); 254 data += sizeof(rctx->buffer); 255 len -= sizeof(rctx->buffer); 256 } 257 258 memcpy(rctx->buffer, data, len); 259 260out: 261 return 0; 262} 263 264/* Add padding and return the message digest. */ 265static int rmd128_final(struct shash_desc *desc, u8 *out) 266{ 267 struct rmd128_ctx *rctx = shash_desc_ctx(desc); 268 u32 i, index, padlen; 269 __le64 bits; 270 __le32 *dst = (__le32 *)out; 271 static const u8 padding[64] = { 0x80, }; 272 273 bits = cpu_to_le64(rctx->byte_count << 3); 274 275 /* Pad out to 56 mod 64 */ 276 index = rctx->byte_count & 0x3f; 277 padlen = (index < 56) ? (56 - index) : ((64+56) - index); 278 rmd128_update(desc, padding, padlen); 279 280 /* Append length */ 281 rmd128_update(desc, (const u8 *)&bits, sizeof(bits)); 282 283 /* Store state in digest */ 284 for (i = 0; i < 4; i++) 285 dst[i] = cpu_to_le32p(&rctx->state[i]); 286 287 /* Wipe context */ 288 memset(rctx, 0, sizeof(*rctx)); 289 290 return 0; 291} 292 293static struct shash_alg alg = { 294 .digestsize = RMD128_DIGEST_SIZE, 295 .init = rmd128_init, 296 .update = rmd128_update, 297 .final = rmd128_final, 298 .descsize = sizeof(struct rmd128_ctx), 299 .base = { 300 .cra_name = "rmd128", 301 .cra_driver_name = "rmd128-generic", 302 .cra_blocksize = RMD128_BLOCK_SIZE, 303 .cra_module = THIS_MODULE, 304 } 305}; 306 307static int __init rmd128_mod_init(void) 308{ 309 return crypto_register_shash(&alg); 310} 311 312static void __exit rmd128_mod_fini(void) 313{ 314 crypto_unregister_shash(&alg); 315} 316 317subsys_initcall(rmd128_mod_init); 318module_exit(rmd128_mod_fini); 319 320MODULE_LICENSE("GPL"); 321MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>"); 322MODULE_DESCRIPTION("RIPEMD-128 Message Digest"); 323MODULE_ALIAS_CRYPTO("rmd128"); 324