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:

8

See Also:

AlgorithmParameterSpec

Constructors

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.

Methods

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.