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/*
* Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include "precompiled.hpp"
#include "classfile/altHashing.hpp"
#include "utilities/debug.hpp"
#include "utilities/formatBuffer.hpp"
#include "utilities/globalDefinitions.hpp"
#include "unittest.hpp"
class AltHashingTest : public ::testing::Test {
public:
static void testHalfsiphash_32_ByteArray() {
const int factor = 4;
uint8_t vector[256];
uint8_t hashes[factor * 256];
for (int i = 0; i < 256; i++) {
vector[i] = (uint8_t) i;
}
// Hash subranges {}, {0}, {0,1}, {0,1,2}, ..., {0,...,255}
for (int i = 0; i < 256; i++) {
uint32_t hash = AltHashing::halfsiphash_32(256 - i, vector, i);
hashes[i * factor] = (uint8_t) hash;
hashes[i * factor + 1] = (uint8_t)(hash >> 8);
hashes[i * factor + 2] = (uint8_t)(hash >> 16);
hashes[i * factor + 3] = (uint8_t)(hash >> 24);
}
// hash to get const result.
uint32_t final_hash = AltHashing::halfsiphash_32(0, hashes, factor*256);
// Value found using reference implementation for the hashes array.
//uint64_t k = 0; // seed
//uint32_t reference;
//halfsiphash((const uint8_t*)hashes, factor*256, (const uint8_t *)&k, (uint8_t*)&reference, 4);
//printf("0x%x", reference);
static const uint32_t HALFSIPHASH_32_BYTE_CHECK_VALUE = 0xd2be7fd8;
ASSERT_EQ(HALFSIPHASH_32_BYTE_CHECK_VALUE, final_hash) <<
err_msg(
"Calculated hash result not as expected. Expected " UINT32_FORMAT " got " UINT32_FORMAT,
HALFSIPHASH_32_BYTE_CHECK_VALUE,
final_hash);
}
static void testHalfsiphash_32_CharArray() {
const int factor = 2;
uint16_t vector[256];
uint16_t hashes[factor * 256];
for (int i = 0; i < 256; i++) {
vector[i] = (uint16_t) i;
}
// Hash subranges {}, {0}, {0,1}, {0,1,2}, ..., {0,...,255}
for (int i = 0; i < 256; i++) {
uint32_t hash = AltHashing::halfsiphash_32(256 - i, vector, i);
hashes[i * factor] = (uint16_t) hash;
hashes[i * factor + 1] = (uint16_t)(hash >> 16);
}
// hash to get const result.
uint32_t final_hash = AltHashing::halfsiphash_32(0, hashes, factor*256);
// Value found using reference implementation for the hashes array.
//uint64_t k = 0; // seed
//uint32_t reference;
//halfsiphash((const uint8_t*)hashes, 2*factor*256, (const uint8_t *)&k, (uint8_t*)&reference, 4);
//printf("0x%x", reference);
static const uint32_t HALFSIPHASH_32_CHAR_CHECK_VALUE = 0x428bf8a5;
ASSERT_EQ(HALFSIPHASH_32_CHAR_CHECK_VALUE, final_hash) <<
err_msg(
"Calculated hash result not as expected. Expected " UINT32_FORMAT " got " UINT32_FORMAT,
HALFSIPHASH_32_CHAR_CHECK_VALUE,
final_hash);
}
// Test against sample hashes published with the reference implementation:
// https://github.com/veorq/SipHash
static void testHalfsiphash_64_FromReference() {
const uint64_t seed = 0x0706050403020100;
const uint64_t results[16] = {
0xc83cb8b9591f8d21, 0xa12ee55b178ae7d5,
0x8c85e4bc20e8feed, 0x99c7f5ae9f1fc77b,
0xb5f37b5fd2aa3673, 0xdba7ee6f0a2bf51b,
0xf1a63fae45107470, 0xb516001efb5f922d,
0x6c6211d8469d7028, 0xdc7642ec407ad686,
0x4caec8671cc8385b, 0x5ab1dc27adf3301e,
0x3e3ea94bc0a8eaa9, 0xe150f598795a4402,
0x1d5ff142f992a4a1, 0x60e426bf902876d6
};
uint32_t vector[16];
for (int i = 0; i < 16; i++)
vector[i] = 0x03020100 + i * 0x04040404;
for (int i = 0; i < 16; i++) {
uint64_t hash = AltHashing::halfsiphash_64(seed, vector, i);
ASSERT_EQ(results[i], hash) <<
err_msg(
"Calculated hash result not as expected. Round %d: "
"Expected " UINT64_FORMAT_X " got " UINT64_FORMAT_X "\n",
i,
results[i],
hash);
}
}
};
TEST_F(AltHashingTest, halfsiphash_test_ByteArray) {
AltHashingTest::testHalfsiphash_32_ByteArray();
}
TEST_F(AltHashingTest, halfsiphash_test_CharArray) {
AltHashingTest::testHalfsiphash_32_CharArray();
}
TEST_F(AltHashingTest, halfsiphash_test_FromReference) {
AltHashingTest::testHalfsiphash_64_FromReference();
}
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