javax.crypto.spec
Class DHGenParameterSpec

java.lang.Object
  javax.crypto.spec.DHGenParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec

public class DHGenParameterSpec
extends Object
implements AlgorithmParameterSpec

This class specifies the set of parameters used for generating Diffie-Hellman (system) parameters for use in Diffie-Hellman key agreement. This is typically done by a central authority.

The central authority, after computing the parameters, must send this information to the parties looking to agree on a secret key.

Version:

$Id: DHGenParameterSpec.java 1913 2007-08-08 02:41:53Z jpeters $

Author:

Patric Kabus, Jan Peters

Field Summary

private int	exponentSize_ The size (in bits) of the random exponent.
private int	primeSize_ The size (in bits) of the prime modulus.

Constructor Summary

DHGenParameterSpec(int primeSize, int exponentSize)
Constructs a parameter set for the generation of Diffie-Hellman (system) parameters.

Method Summary

int	getExponentSize() Returns the size in bits of the random exponent (private value).
int	getPrimeSize() Returns the size in bits of the prime modulus.

Methods inherited from class java.lang.Object

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

Field Detail

primeSize_

private int primeSize_

The size (in bits) of the prime modulus.

exponentSize_

private int exponentSize_

The size (in bits) of the random exponent.

Constructor Detail

DHGenParameterSpec

public DHGenParameterSpec(int primeSize,
                          int exponentSize)

Constructs a parameter set for the generation of Diffie-Hellman (system) parameters. The constructed parameter set can be used to initialize an AlgorithmParameterGenerator object for the generation of Diffie-Hellman parameters.

Parameters:

primeSize - the size (in bits) of the prime modulus.

exponentSize - the size (in bits) of the random exponent.

Method Detail

getPrimeSize

public int getPrimeSize()

Returns the size in bits of the prime modulus.

Returns:

the size in bits of the prime modulus.

getExponentSize

public int getExponentSize()

Returns the size in bits of the random exponent (private value).

Returns:

the size in bits of the random exponent (private value).