Package org.bouncycastle.jcajce.spec

Class DSADomainParametersGenerationParameterSpec

java.lang.Object

org.bouncycastle.jcajce.spec.DSADomainParametersGenerationParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec

public class DSADomainParametersGenerationParameterSpec
extends Object
implements AlgorithmParameterSpec

Parameter spec for guiding the generation of DSA Domain Parameters.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DIGITAL_SIGNATURE_USAGE
static final int	KEY_ESTABLISHMENT_USAGE

Constructor Summary

Constructors

Constructor	Description
DSADomainParametersGenerationParameterSpec(int L, int N, int certainty)	Construct without a usage index, this will do a random construction of G.
DSADomainParametersGenerationParameterSpec(int L, int N, int certainty, int usageIndex)	Construct for a specific usage index - this has the effect of using verifiable canonical generation of G.
DSADomainParametersGenerationParameterSpec(BigInteger p, BigInteger q)	Construct using a specific value of p and q - this will do a random construction of g.
DSADomainParametersGenerationParameterSpec(BigInteger p, BigInteger q, byte[] seed, int usageIndex)	Construct using a specific value of p and q, but with a seed and usageIndex as well - this has the effect of using verifiable canonical generation of G.

Method Summary

Modifier and Type	Method	Description
int	getCertainty()
DigestAlgorithm	getDigestAlgorithm()
int	getL()
int	getN()
BigInteger	getP()
BigInteger	getQ()
byte[]	getSeed()
int	getUsageIndex()
DSADomainParametersGenerationParameterSpec	withDigestAlgorithm(DigestAlgorithm digestAlgorithm)	Create a spec which also specifies a specific digest algorithm to use for parameters generation.

Methods inherited from class java.lang.Object

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

Field Details

DIGITAL_SIGNATURE_USAGE

public static final int DIGITAL_SIGNATURE_USAGE

See Also:

• Constant Field Values

KEY_ESTABLISHMENT_USAGE

public static final int KEY_ESTABLISHMENT_USAGE

See Also:

• Constant Field Values

Constructor Details

DSADomainParametersGenerationParameterSpec

public DSADomainParametersGenerationParameterSpec(int L,
 int N,
 int certainty)

Construct without a usage index, this will do a random construction of G.

Parameters:

L - desired length of prime P in bits (the effective key size).

N - desired length of prime Q in bits.

certainty - certainty level for prime number generation.

DSADomainParametersGenerationParameterSpec

public DSADomainParametersGenerationParameterSpec(int L,
 int N,
 int certainty,
 int usageIndex)

Construct for a specific usage index - this has the effect of using verifiable canonical generation of G.

Parameters:

L - desired length of prime P in bits (the effective key size).

N - desired length of prime Q in bits.

certainty - certainty level for prime number generation.

usageIndex - a valid usage index.

DSADomainParametersGenerationParameterSpec

public DSADomainParametersGenerationParameterSpec(BigInteger p,
 BigInteger q)

Construct using a specific value of p and q - this will do a random construction of g.

Parameters:

p - the prime p.

q - the sub-prime q.

DSADomainParametersGenerationParameterSpec

public DSADomainParametersGenerationParameterSpec(BigInteger p,
 BigInteger q,
 byte[] seed,
 int usageIndex)

Construct using a specific value of p and q, but with a seed and usageIndex as well - this has the effect of using verifiable canonical generation of G.

Parameters:

p - the prime p.

q - the sub-prime q.

seed - the seed used to generate p and q.

usageIndex - a valid usage index.

Method Details

withDigestAlgorithm

public DSADomainParametersGenerationParameterSpec withDigestAlgorithm(DigestAlgorithm digestAlgorithm)

Create a spec which also specifies a specific digest algorithm to use for parameters generation.

Parameters:

digestAlgorithm - the specific digest algorithm to use.

Returns:

a new parameters generator spec.

getL

public int getL()

getN

public int getN()

getCertainty

public int getCertainty()

getUsageIndex

public int getUsageIndex()

getP

public BigInteger getP()

getQ

public BigInteger getQ()

getSeed

public byte[] getSeed()

getDigestAlgorithm

public DigestAlgorithm getDigestAlgorithm()