org.bouncycastle.jcajce.spec

Class DHDomainParameterSpec

java.lang.Object

javax.crypto.spec.DHParameterSpec

org.bouncycastle.jcajce.spec.DHDomainParameterSpec

All Implemented Interfaces:

java.security.spec.AlgorithmParameterSpec

public class DHDomainParameterSpec
extends javax.crypto.spec.DHParameterSpec

Extension class for DHParameterSpec that wraps a DHDomainParameters object and provides the q domain parameter.

Constructor Summary

Constructors

Constructor and Description
DHDomainParameterSpec(java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger g) Minimal constructor for parameters able to be used to verify a public key, or use with MQV.
DHDomainParameterSpec(java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger g, java.math.BigInteger j, int l, DHValidationParameters validationParameters) X9.42 parameters with private value length.
DHDomainParameterSpec(java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger g, java.math.BigInteger j, int m, int l, DHValidationParameters validationParameters) Base constructor - the full domain parameter set.
DHDomainParameterSpec(java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger g, int l) Minimal constructor for parameters able to be used to verify a public key, or use with MQV, and a private value length.
DHDomainParameterSpec(DHDomainParameters domainParameters) Base constructor - use the values in an existing set of domain parameters.

Method Summary

Modifier and Type	Method and Description
DHDomainParameters	getDomainParameters() Return the DHDomainParameters object we represent.
java.math.BigInteger	getJ() Return the J value for the domain parameter set if available.
int	getM() Return the minimum bitlength for a private value to be generated from these parameters, 0 if not set.
java.math.BigInteger	getQ() Return the Q value for the domain parameter set.
DHValidationParameters	getValidationParameters() Return the validation parameters for the domain parameter set.

Methods inherited from class javax.crypto.spec.DHParameterSpec

getG, getL, getP

Methods inherited from class java.lang.Object

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

Constructor Detail

DHDomainParameterSpec

public DHDomainParameterSpec(DHDomainParameters domainParameters)

Base constructor - use the values in an existing set of domain parameters.

Parameters:

domainParameters - the Diffie-Hellman domain parameters to wrap.

DHDomainParameterSpec

public DHDomainParameterSpec(java.math.BigInteger p,
                             java.math.BigInteger q,
                             java.math.BigInteger g)

Minimal constructor for parameters able to be used to verify a public key, or use with MQV.

Parameters:

p - the prime p defining the Galois field.

g - the generator of the multiplicative subgroup of order g.

q - specifies the prime factor of p - 1

DHDomainParameterSpec

public DHDomainParameterSpec(java.math.BigInteger p,
                             java.math.BigInteger q,
                             java.math.BigInteger g,
                             int l)

Minimal constructor for parameters able to be used to verify a public key, or use with MQV, and a private value length.

Parameters:

p - the prime p defining the Galois field.

g - the generator of the multiplicative subgroup of order g.

q - specifies the prime factor of p - 1

l - the maximum bit length for the private value.

DHDomainParameterSpec

public DHDomainParameterSpec(java.math.BigInteger p,
                             java.math.BigInteger q,
                             java.math.BigInteger g,
                             java.math.BigInteger j,
                             int l,
                             DHValidationParameters validationParameters)

X9.42 parameters with private value length.

Parameters:

p - the prime p defining the Galois field.

g - the generator of the multiplicative subgroup of order g.

q - specifies the prime factor of p - 1

j - optionally specifies the value that satisfies the equation p = jq+1

l - the maximum bit length for the private value.

validationParameters - parameters for validating these domain parameters.

DHDomainParameterSpec

public DHDomainParameterSpec(java.math.BigInteger p,
                             java.math.BigInteger q,
                             java.math.BigInteger g,
                             java.math.BigInteger j,
                             int m,
                             int l,
                             DHValidationParameters validationParameters)

Base constructor - the full domain parameter set.

Parameters:

p - the prime p defining the Galois field.

g - the generator of the multiplicative subgroup of order g.

q - specifies the prime factor of p - 1

j - optionally specifies the value that satisfies the equation p = jq+1

m - the minimum bit length for the private value.

l - the maximum bit length for the private value.

validationParameters - parameters for validating these domain parameters.

Method Detail

getQ

public java.math.BigInteger getQ()

Return the Q value for the domain parameter set.

Returns:

the value Q.

getJ

public java.math.BigInteger getJ()

Return the J value for the domain parameter set if available.

Returns:

the value J, null otherwise.

getM

public int getM()

Return the minimum bitlength for a private value to be generated from these parameters, 0 if not set.

Returns:

minimum bitlength for private value.

getValidationParameters

public DHValidationParameters getValidationParameters()

Return the validation parameters for the domain parameter set.

Returns:

the Diffie-Hellman validation parameters.

getDomainParameters

public DHDomainParameters getDomainParameters()

Return the DHDomainParameters object we represent.

Returns:

the internal DHDomainParameters.