part4
Class DLH

java.lang.Object
  part4.DLH

All Implemented Interfaces:

HashFunction

public class DLH

extends java.lang.Object

implements HashFunction

A class that implements the Discrete Log Hash Function.

Constructor Summary

DLH(java.math.BigInteger p, java.math.BigInteger a, java.math.BigInteger b)
A constructor that instantiates an object with prime p and generators a & b.

Method Summary

java.math.BigInteger	h(java.math.BigInteger x1, java.math.BigInteger x2) A method that implements the hash function h.
java.math.BigInteger	hash(java.lang.String str) A method that implements the function to hash a string to a big integer value.

Methods inherited from class java.lang.Object

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

Constructor Detail

DLH

public DLH(java.math.BigInteger p,
           java.math.BigInteger a,
           java.math.BigInteger b)
    throws java.lang.Exception

A constructor that instantiates an object with prime p and generators a & b.

Throws:

java.lang.Exception

Method Detail

h

public java.math.BigInteger h(java.math.BigInteger x1,
                              java.math.BigInteger x2)
                       throws java.lang.Exception

A method that implements the hash function h.

Throws:

java.lang.Exception

hash

public java.math.BigInteger hash(java.lang.String str)
                          throws java.lang.Exception

A method that implements the function to hash a string to a big integer value.

Specified by:

hash in interface HashFunction

Throws:

java.lang.Exception