Module java.base

Package java.security.spec

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

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 inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

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 Detail

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.