Class DSAGenParameterSpec

java.lang.Object

java.security.spec.DSAGenParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec

public final class DSAGenParameterSpec
extends Object
implements AlgorithmParameterSpec

This immutable class specifies the set of parameters used for generating DSA parameters as specified in FIPS 186-3 Digital Signature Standard (DSS).

Since:

1.8

External Specifications

• FIPS 186-3 Digital Signature Standard (DSS)

See Also:

• AlgorithmParameterSpec

Constructor Summary

Constructors

Constructor	Description
DSAGenParameterSpec(int primePLen, int subprimeQLen)	Creates a domain parameter specification for DSA parameter generation using primePLen and subprimeQLen.
DSAGenParameterSpec(int primePLen, int subprimeQLen, int seedLen)	Creates a domain parameter specification for DSA parameter generation using primePLen, subprimeQLen, and seedLen.

Method Summary

Modifier and Type	Method	Description
int	getPrimePLength()	Returns the desired length of the prime P of the to-be-generated DSA domain parameters in bits.
int	getSeedLength()	Returns the desired length of the domain parameter seed in bits.
int	getSubprimeQLength()	Returns the desired length of the sub-prime Q of the to-be-generated DSA domain parameters in bits.

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

DSAGenParameterSpec

public DSAGenParameterSpec(int primePLen,
 int subprimeQLen)

Creates a domain parameter specification for DSA parameter generation using primePLen and subprimeQLen. The value of subprimeQLen is also used as the default length of the domain parameter seed in bits.

Parameters:

primePLen - the desired length of the prime P in bits.

subprimeQLen - the desired length of the sub-prime Q in bits.

Throws:

IllegalArgumentException - if primePLen or subprimeQLen is illegal per the specification of FIPS 186-3.

DSAGenParameterSpec

public DSAGenParameterSpec(int primePLen,
 int subprimeQLen,
 int seedLen)

Creates a domain parameter specification for DSA parameter generation using primePLen, subprimeQLen, and seedLen.

Parameters:

primePLen - the desired length of the prime P in bits.

subprimeQLen - the desired length of the sub-prime Q in bits.

seedLen - the desired length of the domain parameter seed in bits, shall be equal to or greater than subprimeQLen.

Throws:

IllegalArgumentException - if primePLenLen, subprimeQLen, or seedLen is illegal per the specification of FIPS 186-3.

Method Details

getPrimePLength

public int getPrimePLength()

Returns the desired length of the prime P of the to-be-generated DSA domain parameters in bits.

Returns:

the length of the prime P.

getSubprimeQLength

public int getSubprimeQLength()

Returns the desired length of the sub-prime Q of the to-be-generated DSA domain parameters in bits.

Returns:

the length of the sub-prime Q.

getSeedLength

public int getSeedLength()

Returns the desired length of the domain parameter seed in bits.

Returns:

the length of the domain parameter seed.