DHGenParameterSpec

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 Summary

Constructors

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

Method Summary

All Methods

Instance Methods

Concrete Methods
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)