com.scurrilous.circe.params.SipHash24Parameters Maven / Gradle / Ivy
/*******************************************************************************
* Copyright 2014 Trevor Robinson
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.scurrilous.circe.params;
import com.scurrilous.circe.HashParameters;
/**
* Hash parameters for SipHash-2-4.
*/
public final class SipHash24Parameters implements HashParameters {
private final long seedLow;
private final long seedHigh;
/**
* Constructs a {@link SipHash24Parameters} with the default seed,
* {@code 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F}.
*/
public SipHash24Parameters() {
this(0x0706050403020100L, 0x0f0e0d0c0b0a0908L);
}
/**
* Constructs a {@link SipHash24Parameters} with the given seed.
*
* @param seedLow the low-order 64 bits of the seed
* @param seedHigh the high-order 64 bits of the seed
*/
public SipHash24Parameters(long seedLow, long seedHigh) {
this.seedLow = seedLow;
this.seedHigh = seedHigh;
}
/**
* Returns the low-order 64 bits of the seed.
*
* @return low-order bits of seed
*/
public long seedLow() {
return seedLow;
}
/**
* Returns the high-order 64 bits of the seed.
*
* @return high-order bits of seed
*/
public long seedHigh() {
return seedHigh;
}
@Override
public String algorithm() {
return "SipHash-2-4";
}
}