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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include <array>
#include <string>
#include <third_party/murmurhash3/MurmurHash3.h>
#include "mongo/unittest/unittest.h"
#include "mongo/base/data_type_endian.h"
#include "mongo/base/data_view.h"
#define TEST_STRING32(str, seed, expected) ASSERT_EQUALS(compute32(str, seed), expected)
#define TEST_STRING64(str, seed, a, b) \
do { \
auto pair = compute128(str, seed); \
ASSERT_EQUALS(pair.first, a); \
ASSERT_EQUALS(pair.second, b); \
} while (0)
namespace mongo {
namespace {
uint32_t compute32(StringData input, uint32_t seed) {
char hash[4];
MurmurHash3_x86_32(input.rawData(), input.size(), seed, &hash);
return ConstDataView(hash).read<LittleEndian<uint32_t>>();
}
std::pair<uint64_t, uint64_t> compute128(StringData input, uint32_t seed) {
char hash[16];
MurmurHash3_x64_128(input.rawData(), input.size(), seed, &hash);
return {ConstDataView(hash).read<LittleEndian<uint64_t>>(),
ConstDataView(hash).read<LittleEndian<uint64_t>>(8)};
}
TEST(MurmurHash3, TestVectors32) {
TEST_STRING32("", 0, 0ULL);
TEST_STRING32("", 1ULL, 0x514E28B7ULL);
TEST_STRING32("", 0xffffffffULL, 0x81F16F39ULL); // make sure seed value is handled unsigned
TEST_STRING32("\0\0\0\0"_sd, 0ULL, 0x2362F9DEULL); // make sure we handle embedded nulls
TEST_STRING32("aaaa", 0x9747b28cULL, 0x5A97808AULL); // one full chunk
TEST_STRING32("aaa", 0x9747b28cULL, 0x283E0130ULL); // three characters
TEST_STRING32("aa", 0x9747b28cULL, 0x5D211726ULL); // two characters
TEST_STRING32("a", 0x9747b28cULL, 0x7FA09EA6ULL); // one character
// Endian order within the chunks
TEST_STRING32("abcd", 0x9747b28cULL, 0xF0478627ULL); // one full chunk
TEST_STRING32("abc", 0x9747b28cULL, 0xC84A62DDULL);
TEST_STRING32("ab", 0x9747b28cULL, 0x74875592ULL);
TEST_STRING32("a", 0x9747b28cULL, 0x7FA09EA6ULL);
TEST_STRING32("Hello, world!", 0x9747b28cULL, 0x24884CBAULL);
// Make sure you handle UTF-8 high characters. A bcrypt implementation messed this up
TEST_STRING32("ππππππππ", 0x9747b28cULL, 0xD58063C1ULL); // U+03C0: Greek Small Letter Pi
// String of 256 characters.
// Make sure you don't store string lengths in a char, and overflow at 255 bytes (as OpenBSD's
// canonical BCrypt implementation did)
TEST_STRING32(std::string(256, 'a'), 0x9747b28cULL, 0x37405BDCULL);
}
TEST(MurmurHash3, TestVectors64) {
TEST_STRING64("", 0, 0ULL, 0ULL);
TEST_STRING64("", 1ULL, 5048724184180415669ULL, 5864299874987029891ULL);
TEST_STRING64("",
0xffffffffULL,
7706185961851046380ULL,
9616347466054386795ULL); // make sure seed value is handled unsigned
TEST_STRING64("\0\0\0\0"_sd,
0ULL,
14961230494313510588ULL,
6383328099726337777ULL); // make sure we handle embedded nulls
TEST_STRING64(
"aaaa", 0x9747b28cULL, 13033599803469372400ULL, 11949150323828610719ULL); // one full chunk
TEST_STRING64("aaa",
0x9747b28cULL,
10278871841506805355ULL,
17952965428487426844ULL); // three characters
TEST_STRING64(
"aa", 0x9747b28cULL, 1343929393636293407ULL, 16804672932933964801ULL); // two characters
TEST_STRING64(
"a", 0x9747b28cULL, 6694838689256856093ULL, 11415968713816993796ULL); // one character
// Endian order within the chunks
TEST_STRING64(
"abcd", 0x9747b28cULL, 5310993687375067025ULL, 9979528070057666491ULL); // one full chunk
TEST_STRING64("abc", 0x9747b28cULL, 3982135406228655836ULL, 14835035517329147071ULL);
TEST_STRING64("ab", 0x9747b28cULL, 9526501539032868875ULL, 9131386788375312171ULL);
TEST_STRING64("a", 0x9747b28cULL, 6694838689256856093ULL, 11415968713816993796ULL);
TEST_STRING64("Hello, world!", 0x9747b28cULL, 17132966038248896814ULL, 17896881015324243642ULL);
// Make sure you handle UTF-8 high characters. A bcrypt implementation messed this up
TEST_STRING64("ππππππππ",
0x9747b28cULL,
10874605236735318559ULL,
17921841414653337979ULL); // U+03C0: Greek Small Letter Pi
// String of 256 characters.
// Make sure you don't store string lengths in a char, and overflow at 255 bytes (as OpenBSD's
// canonical BCrypt implementation did)
TEST_STRING64(
std::string(256, 'a'), 0x9747b28cULL, 557766291455132100ULL, 14184293241195392597ULL);
}
} // namespace
} // namespace mongo
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