diff options
| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2019-02-26 01:50:27 +0100 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2019-03-01 00:35:13 +0100 |
| commit | cf48b532b447faa969347fef183c6e8921c4ded2 (patch) | |
| tree | df0d4539325b6a7a89d0dac0b19c5a1c17293cc6 /src/Crypto/t1ha_selfcheck.c | |
| parent | 29b749bdd96668d1aa9259b70be436e807b46af2 (diff) | |
| download | VeraCrypt-cf48b532b447faa969347fef183c6e8921c4ded2.tar.gz VeraCrypt-cf48b532b447faa969347fef183c6e8921c4ded2.zip | |
Windows: Implement RAM encryption for keys on 64-bit machines using ChaCha12 cipher and t1ha non-cryptographic fast hash (https://github.com/leo-yuriev/t1ha)
Diffstat (limited to 'src/Crypto/t1ha_selfcheck.c')
| -rw-r--r-- | src/Crypto/t1ha_selfcheck.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/Crypto/t1ha_selfcheck.c b/src/Crypto/t1ha_selfcheck.c new file mode 100644 index 00000000..51d02912 --- /dev/null +++ b/src/Crypto/t1ha_selfcheck.c @@ -0,0 +1,99 @@ +/* + * Copyright (c) 2016-2018 Positive Technologies, https://www.ptsecurity.com, + * Fast Positive Hash. + * + * Portions Copyright (c) 2010-2018 Leonid Yuriev <leo@yuriev.ru>, + * The 1Hippeus project (t1h). + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any damages + * arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. If you use this software + * in a product, an acknowledgement in the product documentation would be + * appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source distribution. + */ + +/* + * t1ha = { Fast Positive Hash, aka "Позитивный Хэш" } + * by [Positive Technologies](https://www.ptsecurity.ru) + * + * Briefly, it is a 64-bit Hash Function: + * 1. Created for 64-bit little-endian platforms, in predominantly for x86_64, + * but portable and without penalties it can run on any 64-bit CPU. + * 2. In most cases up to 15% faster than City64, xxHash, mum-hash, metro-hash + * and all others portable hash-functions (which do not use specific + * hardware tricks). + * 3. Not suitable for cryptography. + * + * The Future will Positive. Всё будет хорошо. + * + * ACKNOWLEDGEMENT: + * The t1ha was originally developed by Leonid Yuriev (Леонид Юрьев) + * for The 1Hippeus project - zerocopy messaging in the spirit of Sparta! + */ + +#include "t1ha_selfcheck.h" +#include "t1ha_bits.h" + +const uint8_t t1ha_test_pattern[64] = { + 0, 1, 2, 3, 4, 5, 6, 7, 0xFF, 0x7F, 0x3F, + 0x1F, 0xF, 8, 16, 32, 64, 0x80, 0xFE, 0xFC, 0xF8, 0xF0, + 0xE0, 0xC0, 0xFD, 0xFB, 0xF7, 0xEF, 0xDF, 0xBF, 0x55, 0xAA, 11, + 17, 19, 23, 29, 37, 42, 43, 'a', 'b', 'c', 'd', + 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', + 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x'}; + +static VC_INLINE int probe(uint64_t (*hash)(const void *, size_t, uint64_t), + const uint64_t reference, const void *data, + unsigned len, uint64_t seed) { + const uint64_t actual = hash(data, len, seed); + assert(actual == reference); + return actual != reference; +} + +__cold int t1ha_selfcheck(uint64_t (*hash)(const void *, size_t, uint64_t), + const uint64_t *reference_values) { + int failed = 0; + uint64_t seed = 1; + const uint64_t zero = 0; + uint8_t pattern_long[512]; + int i; + failed |= probe(hash, /* empty-zero */ *reference_values++, NULL, 0, zero); + failed |= probe(hash, /* empty-all1 */ *reference_values++, NULL, 0, ~zero); + failed |= probe(hash, /* bin64-zero */ *reference_values++, t1ha_test_pattern, + 64, zero); + + for (i = 1; i < 64; i++) { + /* bin%i-1p%i */ + failed |= probe(hash, *reference_values++, t1ha_test_pattern, i, seed); + seed <<= 1; + } + + seed = ~zero; + for (i = 1; i <= 7; i++) { + seed <<= 1; + /* align%i_F%i */; + failed |= + probe(hash, *reference_values++, t1ha_test_pattern + i, 64 - i, seed); + } + + + for (i = 0; i < sizeof(pattern_long); ++i) + pattern_long[i] = (uint8_t)i; + for (i = 0; i <= 7; i++) { + /* long-%05i */ + failed |= + probe(hash, *reference_values++, pattern_long + i, 128 + i * 17, seed); + } + + return failed ? -1 : 0; +} |