iaik.security.dh
Class ESDHParameterSpec

java.lang.Object
  |
  +--javax.crypto.spec.DHParameterSpec
        |
        +--iaik.security.dh.ESDHParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec

public class ESDHParameterSpec

extends DHParameterSpec

Ephemeral-Static Diffie Hellman parameter specification.

This class represents a specification for the prime modulus p, base generator g, prime factor q, the subgroup factor j (if available) and the seed seed and pgenCounter pgenCounter (if available), as used by the Ephemral-Static Diffie-Hellman # key exchange algorithm according to RFC 2631.

Version:

File Revision 14

See Also:

AlgorithmParameterSpec, ESDHParameters

Fields inherited from class javax.crypto.spec.DHParameterSpec

g, p

Constructor Summary

ESDHParameterSpec(BigInteger p, BigInteger g, BigInteger q)
Creates an Ephemeral Static Diffie-Hellman parameter specification, based on given prime modulus p, base generator g and prime factor q.

ESDHParameterSpec(BigInteger p, BigInteger g, BigInteger q, BigInteger j)
Creates an Ephemeral Static Diffie-Hellman parameter specification, based on given prime modulus p, base generator g, prime factor q and soubgroup factor j.

ESDHParameterSpec(BigInteger p, BigInteger g, BigInteger q, BigInteger j, byte[] seed, int pgenCounter)
Creates an Ephemeral Static Diffie-Hellman parameter specification, based on given prime modulus p, base generator g, prime factor q, soubgroup factor j, the seed and counter used in the system parameter generation process.

ESDHParameterSpec(BigInteger p, BigInteger g, BigInteger q, byte[] seed, int pgenCounter)
Creates an Ephemeral Static Diffie-Hellman parameter specification, based on given prime modulus p, base generator g, prime factor q, the seed and counter used in the system parameter generation process.

Method Summary

boolean	equals(Object obj) Compares two ESDHParameterSpec objects.
BigInteger	getJ() Returns the subgroup factor j.
int	getL() This method overrides the method of the super class and always returns 0 since we don't use parameter L in ESDH.
int	getPGenCounter() Returns the counter used in the system parameter generation process.
BigInteger	getQ() Returns the prime factor q.
byte[]	getSeed() Returns the seed used in the system parameter generation process.
int	hashCode() Returns a hash code for this object.
String	toString() Returns a string representation of this Object.

Methods inherited from class javax.crypto.spec.DHParameterSpec

getG, getP

Methods inherited from class java.lang.Object

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

Constructor Detail

ESDHParameterSpec

public ESDHParameterSpec(BigInteger p,
                         BigInteger g,
                         BigInteger q)

Creates an Ephemeral Static Diffie-Hellman parameter specification, based on given prime modulus p, base generator g and prime factor q.

Parameters:

p - the prime modulus

g - the base generator

q - the prime factor

ESDHParameterSpec

public ESDHParameterSpec(BigInteger p,
                         BigInteger g,
                         BigInteger q,
                         BigInteger j)

Creates an Ephemeral Static Diffie-Hellman parameter specification, based on given prime modulus p, base generator g, prime factor q and soubgroup factor j.

Parameters:

p - the prime modulus

g - the base generator

q - the prime factor

j - the subgroup factor

ESDHParameterSpec

public ESDHParameterSpec(BigInteger p,
                         BigInteger g,
                         BigInteger q,
                         byte[] seed,
                         int pgenCounter)

Creates an Ephemeral Static Diffie-Hellman parameter specification, based on given prime modulus p, base generator g, prime factor q, the seed and counter used in the system parameter generation process.

Parameters:

p - the prime modulus

g - the base generator

q - the prime factor

seed - the the seed used in the system parameter generation process

pgenCounter - the counter used in the system parameter generation process

ESDHParameterSpec

public ESDHParameterSpec(BigInteger p,
                         BigInteger g,
                         BigInteger q,
                         BigInteger j,
                         byte[] seed,
                         int pgenCounter)

Creates an Ephemeral Static Diffie-Hellman parameter specification, based on given prime modulus p, base generator g, prime factor q, soubgroup factor j, the seed and counter used in the system parameter generation process.

Parameters:

p - the prime modulus

g - the base generator

q - the prime factor

j - the subgroup factor

seed - the the seed used in the system parameter generation process

pgenCounter - the counter used in the system parameter generation process

Method Detail

getQ

public BigInteger getQ()

Returns the prime factor q.

Returns:

the prime factor q

getJ

public BigInteger getJ()

Returns the subgroup factor j.

Returns:

the subgroup factor j

getSeed

public byte[] getSeed()

Returns the seed used in the system parameter generation process.

Returns:

the seed used in the system parameter generation process

getPGenCounter

public int getPGenCounter()

Returns the counter used in the system parameter generation process.

Returns:

the counter used in the system parameter generation process

getL

public int getL()

This method overrides the method of the super class and always returns 0 since we don't use parameter L in ESDH.

Overrides:

getL in class DHParameterSpec

Returns:

0 is returned

equals

public boolean equals(Object obj)

Compares two ESDHParameterSpec objects.

Overrides:

equals in class Object

Parameters:

obj - the other ESDHParameterSpec

Returns:

true, if the two ESDHParameterSpecs are equal, false otherwise

hashCode

public int hashCode()

Returns a hash code for this object.

Overrides:

hashCode in class Object

Returns:

the hash code

toString

public String toString()

Returns a string representation of this Object.

Overrides:

toString in class DHParameterSpec

Returns:

a string representation