iaik.security.dh

Class ESDHPrivateKeySpec

java.lang.Object

javax.crypto.spec.DHPrivateKeySpec

iaik.security.dh.ESDHPrivateKeySpec

All Implemented Interfaces:

java.security.spec.KeySpec

public class ESDHPrivateKeySpec
extends javax.crypto.spec.DHPrivateKeySpec

Diffie Hellman private key specification.

Attention: This is not a SUN implementation!

This class has been developed by IAIK according to the documentation publically available.
For SUN's documentation of this class see http://java.sun.com/security/JCE1.2/spec/apidoc/index.html

This class represents a Diffie Hellman private key specification. A key specification is a transparent representation of the key material constituting the key. A 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).

See Also:

KeySpec, DHPublicKeySpec

Constructor Summary

Constructors

Constructor and Description
ESDHPrivateKeySpec(java.math.BigInteger x, java.math.BigInteger p, java.math.BigInteger g, java.math.BigInteger q) Creates a Diffie-Hellman private key specification based on given private value x, prime modulus p, base generator g and prime factor q.
ESDHPrivateKeySpec(java.math.BigInteger x, java.math.BigInteger p, java.math.BigInteger g, java.math.BigInteger q, java.math.BigInteger j) Creates a 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(java.math.BigInteger x, java.math.BigInteger p, java.math.BigInteger g, java.math.BigInteger q, java.math.BigInteger j, byte[] seed, int pgenCounter) Creates a 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(java.math.BigInteger x, java.math.BigInteger p, java.math.BigInteger g, java.math.BigInteger q, byte[] seed, int pgenCounter) Creates a 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

Modifier and Type	Method and Description
java.math.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.
java.math.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(java.math.BigInteger x,
                          java.math.BigInteger p,
                          java.math.BigInteger g,
                          java.math.BigInteger q)

Creates a 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(java.math.BigInteger x,
                          java.math.BigInteger p,
                          java.math.BigInteger g,
                          java.math.BigInteger q,
                          java.math.BigInteger j)

Creates a 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(java.math.BigInteger x,
                          java.math.BigInteger p,
                          java.math.BigInteger g,
                          java.math.BigInteger q,
                          byte[] seed,
                          int pgenCounter)

Creates a 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

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

pgenCounter - the counter used in the system parameter generation process

ESDHPrivateKeySpec

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

Creates a 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 java.math.BigInteger getQ()

Returns the prime factor q.

Returns:

the prime factor q

getJ

public java.math.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