RSAKeyGenParameterSpec

AI-generated Key Takeaways

• RSAKeyGenParameterSpec defines parameters for generating RSA key pairs, including key size and public exponent.

• It provides pre-defined public exponent values F0 (3) and F4 (65537).

• You can specify the desired key size and public exponent when creating an RSAKeyGenParameterSpec instance.

• This class is used with KeyPairGenerator to initialize RSA key pair generation.

• It offers methods to retrieve the key size (getKeysize()) and public exponent (getPublicExponent()).

public class RSAKeyGenParameterSpec extends Object
implements AlgorithmParameterSpec

This class specifies the set of parameters used to generate an RSA key pair.

See Also

• KeyPairGenerator.initialize(java.security.spec.AlgorithmParameterSpec)

Field Summary

public static final BigInteger	F0	The public-exponent value F0 = 3.
public static final BigInteger	F4	The public exponent-value F4 = 65537.

Public Constructor Summary

RSAKeyGenParameterSpec(int keysize, BigInteger publicExponent) Constructs a new RSAParameterSpec object from the given keysize and public-exponent value.

Public Method Summary

int	getKeysize() Returns the keysize.
BigInteger	getPublicExponent() Returns the public-exponent value.

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.

Fields

public static final BigInteger F0

The public-exponent value F0 = 3.

public static final BigInteger F4

The public exponent-value F4 = 65537.

Public Constructors

public RSAKeyGenParameterSpec (int keysize, BigInteger publicExponent)

Constructs a new RSAParameterSpec object from the given keysize and public-exponent value.

Parameters

keysize	the modulus size (specified in number of bits)
publicExponent	the public exponent

Public Methods

public int getKeysize ()

Returns the keysize.

Returns

• the keysize.

public BigInteger getPublicExponent ()

Returns the public-exponent value.

Returns

• the public-exponent value.