DHGenParameterSpec

AI-generated Key Takeaways

• DHGenParameterSpec defines parameters for generating Diffie-Hellman system parameters, typically used by a central authority.

• This class specifies the size of the prime modulus and the random exponent used in Diffie-Hellman key agreement.

• A central authority generates these parameters and distributes them to parties who intend to agree on a secret key.

• DHGenParameterSpec includes methods to retrieve the size of the prime modulus (getPrimeSize) and the random exponent (getExponentSize).

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.

See Also

• DHParameterSpec

Public Constructor Summary

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

Public 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.

Inherited Method Summary

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

Public Constructors

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.

Public Methods

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)

public int getPrimeSize ()

Returns the size in bits of the prime modulus.

Returns

• the size in bits of the prime modulus