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:

  • Constructor Summary

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

  • Method Summary

    Modifier and Type
    Method
    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 declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • 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 Details

    • 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)