Jason A. Donenfeld | 2c956a6 | 2017-01-08 13:54:00 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. |
| 2 | * |
| 3 | * This file is provided under a dual BSD/GPLv2 license. |
| 4 | * |
| 5 | * SipHash: a fast short-input PRF |
| 6 | * https://131002.net/siphash/ |
| 7 | * |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 8 | * This implementation is specifically for SipHash2-4 for a secure PRF |
| 9 | * and HalfSipHash1-3/SipHash1-3 for an insecure PRF only suitable for |
| 10 | * hashtables. |
Jason A. Donenfeld | 2c956a6 | 2017-01-08 13:54:00 +0100 | [diff] [blame] | 11 | */ |
| 12 | |
| 13 | #include <linux/siphash.h> |
| 14 | #include <asm/unaligned.h> |
| 15 | |
| 16 | #if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 |
| 17 | #include <linux/dcache.h> |
| 18 | #include <asm/word-at-a-time.h> |
| 19 | #endif |
| 20 | |
Jason A. Donenfeld | 66b2dde | 2022-05-07 14:03:46 +0200 | [diff] [blame] | 21 | #define SIPROUND SIPHASH_PERMUTATION(v0, v1, v2, v3) |
Jason A. Donenfeld | 2c956a6 | 2017-01-08 13:54:00 +0100 | [diff] [blame] | 22 | |
| 23 | #define PREAMBLE(len) \ |
Jason A. Donenfeld | 66b2dde | 2022-05-07 14:03:46 +0200 | [diff] [blame] | 24 | u64 v0 = SIPHASH_CONST_0; \ |
| 25 | u64 v1 = SIPHASH_CONST_1; \ |
| 26 | u64 v2 = SIPHASH_CONST_2; \ |
| 27 | u64 v3 = SIPHASH_CONST_3; \ |
Jason A. Donenfeld | 2c956a6 | 2017-01-08 13:54:00 +0100 | [diff] [blame] | 28 | u64 b = ((u64)(len)) << 56; \ |
| 29 | v3 ^= key->key[1]; \ |
| 30 | v2 ^= key->key[0]; \ |
| 31 | v1 ^= key->key[1]; \ |
| 32 | v0 ^= key->key[0]; |
| 33 | |
| 34 | #define POSTAMBLE \ |
| 35 | v3 ^= b; \ |
| 36 | SIPROUND; \ |
| 37 | SIPROUND; \ |
| 38 | v0 ^= b; \ |
| 39 | v2 ^= 0xff; \ |
| 40 | SIPROUND; \ |
| 41 | SIPROUND; \ |
| 42 | SIPROUND; \ |
| 43 | SIPROUND; \ |
| 44 | return (v0 ^ v1) ^ (v2 ^ v3); |
| 45 | |
Arnd Bergmann | b1cd494 | 2021-11-29 10:39:29 -0500 | [diff] [blame] | 46 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
Jason A. Donenfeld | 2c956a6 | 2017-01-08 13:54:00 +0100 | [diff] [blame] | 47 | u64 __siphash_aligned(const void *data, size_t len, const siphash_key_t *key) |
| 48 | { |
| 49 | const u8 *end = data + len - (len % sizeof(u64)); |
| 50 | const u8 left = len & (sizeof(u64) - 1); |
| 51 | u64 m; |
| 52 | PREAMBLE(len) |
| 53 | for (; data != end; data += sizeof(u64)) { |
| 54 | m = le64_to_cpup(data); |
| 55 | v3 ^= m; |
| 56 | SIPROUND; |
| 57 | SIPROUND; |
| 58 | v0 ^= m; |
| 59 | } |
| 60 | #if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 |
| 61 | if (left) |
| 62 | b |= le64_to_cpu((__force __le64)(load_unaligned_zeropad(data) & |
| 63 | bytemask_from_count(left))); |
| 64 | #else |
| 65 | switch (left) { |
| 66 | case 7: b |= ((u64)end[6]) << 48; |
| 67 | case 6: b |= ((u64)end[5]) << 40; |
| 68 | case 5: b |= ((u64)end[4]) << 32; |
| 69 | case 4: b |= le32_to_cpup(data); break; |
| 70 | case 3: b |= ((u64)end[2]) << 16; |
| 71 | case 2: b |= le16_to_cpup(data); break; |
| 72 | case 1: b |= end[0]; |
| 73 | } |
| 74 | #endif |
| 75 | POSTAMBLE |
| 76 | } |
| 77 | EXPORT_SYMBOL(__siphash_aligned); |
Arnd Bergmann | b1cd494 | 2021-11-29 10:39:29 -0500 | [diff] [blame] | 78 | #endif |
Jason A. Donenfeld | 2c956a6 | 2017-01-08 13:54:00 +0100 | [diff] [blame] | 79 | |
Jason A. Donenfeld | 2c956a6 | 2017-01-08 13:54:00 +0100 | [diff] [blame] | 80 | u64 __siphash_unaligned(const void *data, size_t len, const siphash_key_t *key) |
| 81 | { |
| 82 | const u8 *end = data + len - (len % sizeof(u64)); |
| 83 | const u8 left = len & (sizeof(u64) - 1); |
| 84 | u64 m; |
| 85 | PREAMBLE(len) |
| 86 | for (; data != end; data += sizeof(u64)) { |
| 87 | m = get_unaligned_le64(data); |
| 88 | v3 ^= m; |
| 89 | SIPROUND; |
| 90 | SIPROUND; |
| 91 | v0 ^= m; |
| 92 | } |
| 93 | #if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 |
| 94 | if (left) |
| 95 | b |= le64_to_cpu((__force __le64)(load_unaligned_zeropad(data) & |
| 96 | bytemask_from_count(left))); |
| 97 | #else |
| 98 | switch (left) { |
| 99 | case 7: b |= ((u64)end[6]) << 48; |
| 100 | case 6: b |= ((u64)end[5]) << 40; |
| 101 | case 5: b |= ((u64)end[4]) << 32; |
| 102 | case 4: b |= get_unaligned_le32(end); break; |
| 103 | case 3: b |= ((u64)end[2]) << 16; |
| 104 | case 2: b |= get_unaligned_le16(end); break; |
| 105 | case 1: b |= end[0]; |
| 106 | } |
| 107 | #endif |
| 108 | POSTAMBLE |
| 109 | } |
| 110 | EXPORT_SYMBOL(__siphash_unaligned); |
Jason A. Donenfeld | 2c956a6 | 2017-01-08 13:54:00 +0100 | [diff] [blame] | 111 | |
| 112 | /** |
| 113 | * siphash_1u64 - compute 64-bit siphash PRF value of a u64 |
| 114 | * @first: first u64 |
| 115 | * @key: the siphash key |
| 116 | */ |
| 117 | u64 siphash_1u64(const u64 first, const siphash_key_t *key) |
| 118 | { |
| 119 | PREAMBLE(8) |
| 120 | v3 ^= first; |
| 121 | SIPROUND; |
| 122 | SIPROUND; |
| 123 | v0 ^= first; |
| 124 | POSTAMBLE |
| 125 | } |
| 126 | EXPORT_SYMBOL(siphash_1u64); |
| 127 | |
| 128 | /** |
| 129 | * siphash_2u64 - compute 64-bit siphash PRF value of 2 u64 |
| 130 | * @first: first u64 |
| 131 | * @second: second u64 |
| 132 | * @key: the siphash key |
| 133 | */ |
| 134 | u64 siphash_2u64(const u64 first, const u64 second, const siphash_key_t *key) |
| 135 | { |
| 136 | PREAMBLE(16) |
| 137 | v3 ^= first; |
| 138 | SIPROUND; |
| 139 | SIPROUND; |
| 140 | v0 ^= first; |
| 141 | v3 ^= second; |
| 142 | SIPROUND; |
| 143 | SIPROUND; |
| 144 | v0 ^= second; |
| 145 | POSTAMBLE |
| 146 | } |
| 147 | EXPORT_SYMBOL(siphash_2u64); |
| 148 | |
| 149 | /** |
| 150 | * siphash_3u64 - compute 64-bit siphash PRF value of 3 u64 |
| 151 | * @first: first u64 |
| 152 | * @second: second u64 |
| 153 | * @third: third u64 |
| 154 | * @key: the siphash key |
| 155 | */ |
| 156 | u64 siphash_3u64(const u64 first, const u64 second, const u64 third, |
| 157 | const siphash_key_t *key) |
| 158 | { |
| 159 | PREAMBLE(24) |
| 160 | v3 ^= first; |
| 161 | SIPROUND; |
| 162 | SIPROUND; |
| 163 | v0 ^= first; |
| 164 | v3 ^= second; |
| 165 | SIPROUND; |
| 166 | SIPROUND; |
| 167 | v0 ^= second; |
| 168 | v3 ^= third; |
| 169 | SIPROUND; |
| 170 | SIPROUND; |
| 171 | v0 ^= third; |
| 172 | POSTAMBLE |
| 173 | } |
| 174 | EXPORT_SYMBOL(siphash_3u64); |
| 175 | |
| 176 | /** |
| 177 | * siphash_4u64 - compute 64-bit siphash PRF value of 4 u64 |
| 178 | * @first: first u64 |
| 179 | * @second: second u64 |
| 180 | * @third: third u64 |
| 181 | * @forth: forth u64 |
| 182 | * @key: the siphash key |
| 183 | */ |
| 184 | u64 siphash_4u64(const u64 first, const u64 second, const u64 third, |
| 185 | const u64 forth, const siphash_key_t *key) |
| 186 | { |
| 187 | PREAMBLE(32) |
| 188 | v3 ^= first; |
| 189 | SIPROUND; |
| 190 | SIPROUND; |
| 191 | v0 ^= first; |
| 192 | v3 ^= second; |
| 193 | SIPROUND; |
| 194 | SIPROUND; |
| 195 | v0 ^= second; |
| 196 | v3 ^= third; |
| 197 | SIPROUND; |
| 198 | SIPROUND; |
| 199 | v0 ^= third; |
| 200 | v3 ^= forth; |
| 201 | SIPROUND; |
| 202 | SIPROUND; |
| 203 | v0 ^= forth; |
| 204 | POSTAMBLE |
| 205 | } |
| 206 | EXPORT_SYMBOL(siphash_4u64); |
| 207 | |
| 208 | u64 siphash_1u32(const u32 first, const siphash_key_t *key) |
| 209 | { |
| 210 | PREAMBLE(4) |
| 211 | b |= first; |
| 212 | POSTAMBLE |
| 213 | } |
| 214 | EXPORT_SYMBOL(siphash_1u32); |
| 215 | |
| 216 | u64 siphash_3u32(const u32 first, const u32 second, const u32 third, |
| 217 | const siphash_key_t *key) |
| 218 | { |
| 219 | u64 combined = (u64)second << 32 | first; |
| 220 | PREAMBLE(12) |
| 221 | v3 ^= combined; |
| 222 | SIPROUND; |
| 223 | SIPROUND; |
| 224 | v0 ^= combined; |
| 225 | b |= third; |
| 226 | POSTAMBLE |
| 227 | } |
| 228 | EXPORT_SYMBOL(siphash_3u32); |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 229 | |
| 230 | #if BITS_PER_LONG == 64 |
| 231 | /* Note that on 64-bit, we make HalfSipHash1-3 actually be SipHash1-3, for |
| 232 | * performance reasons. On 32-bit, below, we actually implement HalfSipHash1-3. |
| 233 | */ |
| 234 | |
| 235 | #define HSIPROUND SIPROUND |
| 236 | #define HPREAMBLE(len) PREAMBLE(len) |
| 237 | #define HPOSTAMBLE \ |
| 238 | v3 ^= b; \ |
| 239 | HSIPROUND; \ |
| 240 | v0 ^= b; \ |
| 241 | v2 ^= 0xff; \ |
| 242 | HSIPROUND; \ |
| 243 | HSIPROUND; \ |
| 244 | HSIPROUND; \ |
| 245 | return (v0 ^ v1) ^ (v2 ^ v3); |
| 246 | |
Arnd Bergmann | b1cd494 | 2021-11-29 10:39:29 -0500 | [diff] [blame] | 247 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 248 | u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key) |
| 249 | { |
| 250 | const u8 *end = data + len - (len % sizeof(u64)); |
| 251 | const u8 left = len & (sizeof(u64) - 1); |
| 252 | u64 m; |
| 253 | HPREAMBLE(len) |
| 254 | for (; data != end; data += sizeof(u64)) { |
| 255 | m = le64_to_cpup(data); |
| 256 | v3 ^= m; |
| 257 | HSIPROUND; |
| 258 | v0 ^= m; |
| 259 | } |
| 260 | #if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 |
| 261 | if (left) |
| 262 | b |= le64_to_cpu((__force __le64)(load_unaligned_zeropad(data) & |
| 263 | bytemask_from_count(left))); |
| 264 | #else |
| 265 | switch (left) { |
| 266 | case 7: b |= ((u64)end[6]) << 48; |
| 267 | case 6: b |= ((u64)end[5]) << 40; |
| 268 | case 5: b |= ((u64)end[4]) << 32; |
| 269 | case 4: b |= le32_to_cpup(data); break; |
| 270 | case 3: b |= ((u64)end[2]) << 16; |
| 271 | case 2: b |= le16_to_cpup(data); break; |
| 272 | case 1: b |= end[0]; |
| 273 | } |
| 274 | #endif |
| 275 | HPOSTAMBLE |
| 276 | } |
| 277 | EXPORT_SYMBOL(__hsiphash_aligned); |
Arnd Bergmann | b1cd494 | 2021-11-29 10:39:29 -0500 | [diff] [blame] | 278 | #endif |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 279 | |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 280 | u32 __hsiphash_unaligned(const void *data, size_t len, |
| 281 | const hsiphash_key_t *key) |
| 282 | { |
| 283 | const u8 *end = data + len - (len % sizeof(u64)); |
| 284 | const u8 left = len & (sizeof(u64) - 1); |
| 285 | u64 m; |
| 286 | HPREAMBLE(len) |
| 287 | for (; data != end; data += sizeof(u64)) { |
| 288 | m = get_unaligned_le64(data); |
| 289 | v3 ^= m; |
| 290 | HSIPROUND; |
| 291 | v0 ^= m; |
| 292 | } |
| 293 | #if defined(CONFIG_DCACHE_WORD_ACCESS) && BITS_PER_LONG == 64 |
| 294 | if (left) |
| 295 | b |= le64_to_cpu((__force __le64)(load_unaligned_zeropad(data) & |
| 296 | bytemask_from_count(left))); |
| 297 | #else |
| 298 | switch (left) { |
| 299 | case 7: b |= ((u64)end[6]) << 48; |
| 300 | case 6: b |= ((u64)end[5]) << 40; |
| 301 | case 5: b |= ((u64)end[4]) << 32; |
| 302 | case 4: b |= get_unaligned_le32(end); break; |
| 303 | case 3: b |= ((u64)end[2]) << 16; |
| 304 | case 2: b |= get_unaligned_le16(end); break; |
| 305 | case 1: b |= end[0]; |
| 306 | } |
| 307 | #endif |
| 308 | HPOSTAMBLE |
| 309 | } |
| 310 | EXPORT_SYMBOL(__hsiphash_unaligned); |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 311 | |
| 312 | /** |
| 313 | * hsiphash_1u32 - compute 64-bit hsiphash PRF value of a u32 |
| 314 | * @first: first u32 |
| 315 | * @key: the hsiphash key |
| 316 | */ |
| 317 | u32 hsiphash_1u32(const u32 first, const hsiphash_key_t *key) |
| 318 | { |
| 319 | HPREAMBLE(4) |
| 320 | b |= first; |
| 321 | HPOSTAMBLE |
| 322 | } |
| 323 | EXPORT_SYMBOL(hsiphash_1u32); |
| 324 | |
| 325 | /** |
| 326 | * hsiphash_2u32 - compute 32-bit hsiphash PRF value of 2 u32 |
| 327 | * @first: first u32 |
| 328 | * @second: second u32 |
| 329 | * @key: the hsiphash key |
| 330 | */ |
| 331 | u32 hsiphash_2u32(const u32 first, const u32 second, const hsiphash_key_t *key) |
| 332 | { |
| 333 | u64 combined = (u64)second << 32 | first; |
| 334 | HPREAMBLE(8) |
| 335 | v3 ^= combined; |
| 336 | HSIPROUND; |
| 337 | v0 ^= combined; |
| 338 | HPOSTAMBLE |
| 339 | } |
| 340 | EXPORT_SYMBOL(hsiphash_2u32); |
| 341 | |
| 342 | /** |
| 343 | * hsiphash_3u32 - compute 32-bit hsiphash PRF value of 3 u32 |
| 344 | * @first: first u32 |
| 345 | * @second: second u32 |
| 346 | * @third: third u32 |
| 347 | * @key: the hsiphash key |
| 348 | */ |
| 349 | u32 hsiphash_3u32(const u32 first, const u32 second, const u32 third, |
| 350 | const hsiphash_key_t *key) |
| 351 | { |
| 352 | u64 combined = (u64)second << 32 | first; |
| 353 | HPREAMBLE(12) |
| 354 | v3 ^= combined; |
| 355 | HSIPROUND; |
| 356 | v0 ^= combined; |
| 357 | b |= third; |
| 358 | HPOSTAMBLE |
| 359 | } |
| 360 | EXPORT_SYMBOL(hsiphash_3u32); |
| 361 | |
| 362 | /** |
| 363 | * hsiphash_4u32 - compute 32-bit hsiphash PRF value of 4 u32 |
| 364 | * @first: first u32 |
| 365 | * @second: second u32 |
| 366 | * @third: third u32 |
| 367 | * @forth: forth u32 |
| 368 | * @key: the hsiphash key |
| 369 | */ |
| 370 | u32 hsiphash_4u32(const u32 first, const u32 second, const u32 third, |
| 371 | const u32 forth, const hsiphash_key_t *key) |
| 372 | { |
| 373 | u64 combined = (u64)second << 32 | first; |
| 374 | HPREAMBLE(16) |
| 375 | v3 ^= combined; |
| 376 | HSIPROUND; |
| 377 | v0 ^= combined; |
| 378 | combined = (u64)forth << 32 | third; |
| 379 | v3 ^= combined; |
| 380 | HSIPROUND; |
| 381 | v0 ^= combined; |
| 382 | HPOSTAMBLE |
| 383 | } |
| 384 | EXPORT_SYMBOL(hsiphash_4u32); |
| 385 | #else |
Jason A. Donenfeld | 66b2dde | 2022-05-07 14:03:46 +0200 | [diff] [blame] | 386 | #define HSIPROUND HSIPHASH_PERMUTATION(v0, v1, v2, v3) |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 387 | |
| 388 | #define HPREAMBLE(len) \ |
Jason A. Donenfeld | 66b2dde | 2022-05-07 14:03:46 +0200 | [diff] [blame] | 389 | u32 v0 = HSIPHASH_CONST_0; \ |
| 390 | u32 v1 = HSIPHASH_CONST_1; \ |
| 391 | u32 v2 = HSIPHASH_CONST_2; \ |
| 392 | u32 v3 = HSIPHASH_CONST_3; \ |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 393 | u32 b = ((u32)(len)) << 24; \ |
| 394 | v3 ^= key->key[1]; \ |
| 395 | v2 ^= key->key[0]; \ |
| 396 | v1 ^= key->key[1]; \ |
| 397 | v0 ^= key->key[0]; |
| 398 | |
| 399 | #define HPOSTAMBLE \ |
| 400 | v3 ^= b; \ |
| 401 | HSIPROUND; \ |
| 402 | v0 ^= b; \ |
| 403 | v2 ^= 0xff; \ |
| 404 | HSIPROUND; \ |
| 405 | HSIPROUND; \ |
| 406 | HSIPROUND; \ |
| 407 | return v1 ^ v3; |
| 408 | |
Arnd Bergmann | b1cd494 | 2021-11-29 10:39:29 -0500 | [diff] [blame] | 409 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 410 | u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key) |
| 411 | { |
| 412 | const u8 *end = data + len - (len % sizeof(u32)); |
| 413 | const u8 left = len & (sizeof(u32) - 1); |
| 414 | u32 m; |
| 415 | HPREAMBLE(len) |
| 416 | for (; data != end; data += sizeof(u32)) { |
| 417 | m = le32_to_cpup(data); |
| 418 | v3 ^= m; |
| 419 | HSIPROUND; |
| 420 | v0 ^= m; |
| 421 | } |
| 422 | switch (left) { |
| 423 | case 3: b |= ((u32)end[2]) << 16; |
| 424 | case 2: b |= le16_to_cpup(data); break; |
| 425 | case 1: b |= end[0]; |
| 426 | } |
| 427 | HPOSTAMBLE |
| 428 | } |
| 429 | EXPORT_SYMBOL(__hsiphash_aligned); |
Arnd Bergmann | b1cd494 | 2021-11-29 10:39:29 -0500 | [diff] [blame] | 430 | #endif |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 431 | |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 432 | u32 __hsiphash_unaligned(const void *data, size_t len, |
| 433 | const hsiphash_key_t *key) |
| 434 | { |
| 435 | const u8 *end = data + len - (len % sizeof(u32)); |
| 436 | const u8 left = len & (sizeof(u32) - 1); |
| 437 | u32 m; |
| 438 | HPREAMBLE(len) |
| 439 | for (; data != end; data += sizeof(u32)) { |
| 440 | m = get_unaligned_le32(data); |
| 441 | v3 ^= m; |
| 442 | HSIPROUND; |
| 443 | v0 ^= m; |
| 444 | } |
| 445 | switch (left) { |
| 446 | case 3: b |= ((u32)end[2]) << 16; |
| 447 | case 2: b |= get_unaligned_le16(end); break; |
| 448 | case 1: b |= end[0]; |
| 449 | } |
| 450 | HPOSTAMBLE |
| 451 | } |
| 452 | EXPORT_SYMBOL(__hsiphash_unaligned); |
Jason A. Donenfeld | 1ae2324 | 2017-01-08 13:54:01 +0100 | [diff] [blame] | 453 | |
| 454 | /** |
| 455 | * hsiphash_1u32 - compute 32-bit hsiphash PRF value of a u32 |
| 456 | * @first: first u32 |
| 457 | * @key: the hsiphash key |
| 458 | */ |
| 459 | u32 hsiphash_1u32(const u32 first, const hsiphash_key_t *key) |
| 460 | { |
| 461 | HPREAMBLE(4) |
| 462 | v3 ^= first; |
| 463 | HSIPROUND; |
| 464 | v0 ^= first; |
| 465 | HPOSTAMBLE |
| 466 | } |
| 467 | EXPORT_SYMBOL(hsiphash_1u32); |
| 468 | |
| 469 | /** |
| 470 | * hsiphash_2u32 - compute 32-bit hsiphash PRF value of 2 u32 |
| 471 | * @first: first u32 |
| 472 | * @second: second u32 |
| 473 | * @key: the hsiphash key |
| 474 | */ |
| 475 | u32 hsiphash_2u32(const u32 first, const u32 second, const hsiphash_key_t *key) |
| 476 | { |
| 477 | HPREAMBLE(8) |
| 478 | v3 ^= first; |
| 479 | HSIPROUND; |
| 480 | v0 ^= first; |
| 481 | v3 ^= second; |
| 482 | HSIPROUND; |
| 483 | v0 ^= second; |
| 484 | HPOSTAMBLE |
| 485 | } |
| 486 | EXPORT_SYMBOL(hsiphash_2u32); |
| 487 | |
| 488 | /** |
| 489 | * hsiphash_3u32 - compute 32-bit hsiphash PRF value of 3 u32 |
| 490 | * @first: first u32 |
| 491 | * @second: second u32 |
| 492 | * @third: third u32 |
| 493 | * @key: the hsiphash key |
| 494 | */ |
| 495 | u32 hsiphash_3u32(const u32 first, const u32 second, const u32 third, |
| 496 | const hsiphash_key_t *key) |
| 497 | { |
| 498 | HPREAMBLE(12) |
| 499 | v3 ^= first; |
| 500 | HSIPROUND; |
| 501 | v0 ^= first; |
| 502 | v3 ^= second; |
| 503 | HSIPROUND; |
| 504 | v0 ^= second; |
| 505 | v3 ^= third; |
| 506 | HSIPROUND; |
| 507 | v0 ^= third; |
| 508 | HPOSTAMBLE |
| 509 | } |
| 510 | EXPORT_SYMBOL(hsiphash_3u32); |
| 511 | |
| 512 | /** |
| 513 | * hsiphash_4u32 - compute 32-bit hsiphash PRF value of 4 u32 |
| 514 | * @first: first u32 |
| 515 | * @second: second u32 |
| 516 | * @third: third u32 |
| 517 | * @forth: forth u32 |
| 518 | * @key: the hsiphash key |
| 519 | */ |
| 520 | u32 hsiphash_4u32(const u32 first, const u32 second, const u32 third, |
| 521 | const u32 forth, const hsiphash_key_t *key) |
| 522 | { |
| 523 | HPREAMBLE(16) |
| 524 | v3 ^= first; |
| 525 | HSIPROUND; |
| 526 | v0 ^= first; |
| 527 | v3 ^= second; |
| 528 | HSIPROUND; |
| 529 | v0 ^= second; |
| 530 | v3 ^= third; |
| 531 | HSIPROUND; |
| 532 | v0 ^= third; |
| 533 | v3 ^= forth; |
| 534 | HSIPROUND; |
| 535 | v0 ^= forth; |
| 536 | HPOSTAMBLE |
| 537 | } |
| 538 | EXPORT_SYMBOL(hsiphash_4u32); |
| 539 | #endif |