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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.

Since:

1.4

See Also:

DHParameterSpec

Constructor and Description

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

Method Summary

Modifier and Type	Method and Description
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

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)