org.bouncycastle.crypto.asymmetric

Class DHDomainParameters

java.lang.Object

org.bouncycastle.crypto.asymmetric.DHDomainParameters

public class DHDomainParameters
extends java.lang.Object

Container class for Diffie-Hellman domain parameters.

Constructor Summary

Constructors

Constructor and Description
DHDomainParameters(java.math.BigInteger p, java.math.BigInteger g) Minimal usable parameters.
DHDomainParameters(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.
DHDomainParameters(java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger g, java.math.BigInteger j, DHValidationParameters validation) Standard constructor - the full X9.42 parameter set.
DHDomainParameters(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 with a private value length.
DHDomainParameters(java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger g, int l, DHValidationParameters validation) X9.42 parameters with private value length.
DHDomainParameters(java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger g, int m, int l) Parameters which can verify a public key with private value lengths.
DHDomainParameters(java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger g, int m, int l, java.math.BigInteger j, DHValidationParameters validation) Base constructor - the full domain parameter set.
DHDomainParameters(java.math.BigInteger p, java.math.BigInteger g, int l) Minimal usable parameters with a private value length (PKCS#3).

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
java.math.BigInteger	getG() Return the generator of the multiplicative subgroup of order g.
java.math.BigInteger	getJ() Return the subgroup factor J, which satisifes the equation p=jq+1, if present.
int	getL() Return the private value length in bits - if set, zero otherwise
int	getM() Return the minimum length of the private value.
java.math.BigInteger	getP() Return the prime p defining the Galois field.
java.math.BigInteger	getQ() Return q, the prime factor of p - 1
DHValidationParameters	getValidationParameters()
int	hashCode()

Methods inherited from class java.lang.Object

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

Constructor Detail

DHDomainParameters

public DHDomainParameters(java.math.BigInteger p,
                          java.math.BigInteger g)

Minimal usable parameters.

Parameters:

p - the prime p defining the Galois field.

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

DHDomainParameters

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

Minimal usable parameters with a private value length (PKCS#3).

Parameters:

p - the prime p defining the Galois field.

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

l - the maximum bit length for the private value.

DHDomainParameters

public DHDomainParameters(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.

Parameters:

p - the prime p defining the Galois field.

q - specifies the prime factor of p - 1.

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

DHDomainParameters

public DHDomainParameters(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 with a private value length.

Parameters:

p - the prime p defining the Galois field.

q - specifies the prime factor of p - 1.

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

l - the maximum bit length for the private value.

DHDomainParameters

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

Parameters which can verify a public key with private value lengths.

Parameters:

p - the prime p defining the Galois field.

q - specifies the prime factor of p - 1.

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

m - the minimum bit length for the private value.

l - the maximum bit length for the private value.

DHDomainParameters

public DHDomainParameters(java.math.BigInteger p,
                          java.math.BigInteger q,
                          java.math.BigInteger g,
                          java.math.BigInteger j,
                          DHValidationParameters validation)

Standard constructor - the full X9.42 parameter set.

Parameters:

p - the prime p defining the Galois field.

q - specifies the prime factor of p - 1.

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

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

validation - parameters for validating these domain parameters.

DHDomainParameters

public DHDomainParameters(java.math.BigInteger p,
                          java.math.BigInteger q,
                          java.math.BigInteger g,
                          int l,
                          DHValidationParameters validation)

X9.42 parameters with private value length.

Parameters:

p - the prime p defining the Galois field.

q - specifies the prime factor of p - 1.

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

l - the maximum bit length for the private value.

validation - parameters for validating these domain parameters.

DHDomainParameters

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

Base constructor - the full domain parameter set.

Parameters:

p - the prime p defining the Galois field.

q - specifies the prime factor of p - 1.

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

m - the minimum bit length for the private value.

l - the maximum bit length for the private value.

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

validation - parameters for validating these domain parameters.

Method Detail

getP

public java.math.BigInteger getP()

Return the prime p defining the Galois field.

Returns:

the prime p.

getG

public java.math.BigInteger getG()

Return the generator of the multiplicative subgroup of order g.

Returns:

the generator g.

getQ

public java.math.BigInteger getQ()

Return q, the prime factor of p - 1

Returns:

q value

getJ

public java.math.BigInteger getJ()

Return the subgroup factor J, which satisifes the equation p=jq+1, if present.

Returns:

subgroup factor, or null.

getM

public int getM()

Return the minimum length of the private value.

Returns:

the minimum length of the private value in bits.

getL

public int getL()

Return the private value length in bits - if set, zero otherwise

Returns:

the private value length in bits, zero otherwise.

getValidationParameters

public DHValidationParameters getValidationParameters()

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object