iaik.security.dh
Class ESDHPrivateKeySpec

java.lang.Object
  |
  +--javax.crypto.spec.DHPrivateKeySpec
        |
        +--iaik.security.dh.ESDHPrivateKeySpec

All Implemented Interfaces:

KeySpec

public class ESDHPrivateKeySpec

extends DHPrivateKeySpec

Ephemeral Static Diffie Hellman private key specification. A key specification is a transparent representation of the key material constituting the key. An Ephemeral Static Diffie Hellman private key specification represents the private value x, and the Diffie Hellman parameters p (prime modulus), g (base generator), and l (length of the private value x).

Version:

File Revision 9

See Also:

ESDHPrivateKey

Fields inherited from class javax.crypto.spec.DHPrivateKeySpec

g, p, x

Constructor Summary

ESDHPrivateKeySpec(BigInteger x, BigInteger p, BigInteger g, BigInteger q)
Creates an Ephemeral Static Diffie-Hellman private key specification based on given private value x, prime modulus p, base generator g and prime factor q.

ESDHPrivateKeySpec(BigInteger x, BigInteger p, BigInteger g, BigInteger q, BigInteger j)
Creates an Ephemeral Static Diffie-Hellman private key specification based on given private value x, prime modulus p, base generator g, prime factor q and subgroup factor j.

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

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

Method Summary

BigInteger	getJ() Returns the subgroup factor j.
long	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.

Methods inherited from class javax.crypto.spec.DHPrivateKeySpec

getG, getP, getX

Methods inherited from class java.lang.Object

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

Constructor Detail

ESDHPrivateKeySpec

public ESDHPrivateKeySpec(BigInteger x,
                          BigInteger p,
                          BigInteger g,
                          BigInteger q)

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

Parameters:

x - the public value

p - the prime modulus

g - the base generator

q - the prime factor

ESDHPrivateKeySpec

public ESDHPrivateKeySpec(BigInteger x,
                          BigInteger p,
                          BigInteger g,
                          BigInteger q,
                          BigInteger j)

Creates an Ephemeral Static Diffie-Hellman private key specification based on given private value x, prime modulus p, base generator g, prime factor q and subgroup factor j.

Parameters:

x - the public value

p - the prime modulus

g - the base generator

q - the prime factor

j - the subgroup factor

ESDHPrivateKeySpec

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

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

Parameters:

x - the public value

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

ESDHPrivateKeySpec

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

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

Parameters:

x - the public value

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

getL

public long getL()

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

Returns:

0 is returned

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