jodd.joy.crypt

Class SipHash

java.lang.Object

jodd.joy.crypt.SipHash

public class SipHash
extends java.lang.Object

SipHash computes 64-bit message authentication code from a variable-length message and 128-bit secret key. It was designed to be efficient even for short inputs, with performance comparable to non-cryptographic hash functions, such as CityHash[1], thus can be used in hash tables to prevent DoS collision attack (hash flooding) or to authenticate network packets.

Functions in SipHash family are specified as SipHash-c-d, where c is the number of rounds per message block and d is the number of finalization rounds. The recommended parameters are SipHash-2-4 for best performance, and SipHash-4-8 for conservative security

Constructor Summary

Constructors

Constructor and Description
SipHash()

Method Summary

Modifier and Type	Method and Description
static long	hashCode(byte[] data)
static long	hashCode(long k0, long k1, byte[] data)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SipHash

public SipHash()

Method Detail

hashCode

public static long hashCode(byte[] data)

hashCode

public static long hashCode(long k0,
                            long k1,
                            byte[] data)