DSAGenParameterSpec

public final class DSAGenParameterSpec
extends Object implements AlgorithmParameterSpec

java.lang.Object
   ↳ java.security.spec.DSAGenParameterSpec


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

Summary

Public constructors

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.

Public methods

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.

Inherited methods

Public constructors

DSAGenParameterSpec

Added in API level 35
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 int: the desired length of the prime P in bits.

subprimeQLen int: 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

Added in API level 35
public DSAGenParameterSpec (int primePLen, 
                int subprimeQLen, 
                int seedLen)

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

Parameters
primePLen int: the desired length of the prime P in bits.

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

seedLen int: 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.

Public methods

getPrimePLength

Added in API level 35
public int getPrimePLength ()

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

Returns
int the length of the prime P.

getSeedLength

Added in API level 35
public int getSeedLength ()

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

Returns
int the length of the domain parameter seed.

getSubprimeQLength

Added in API level 35
public int getSubprimeQLength ()

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

Returns
int the length of the sub-prime Q.