part3
Class EGPrivateKey

java.lang.Object
  part3.EGPrivateKey

Direct Known Subclasses:

EGSignatureKey

public class EGPrivateKey

extends java.lang.Object

A class to implement an ElGamal private key.

Field Summary

protected java.math.BigInteger	_g
protected java.math.BigInteger	_p
protected java.math.BigInteger	_x

Constructor Summary

EGPrivateKey(java.math.BigInteger p, java.math.BigInteger g, java.math.BigInteger x)
A constructor for an ElGamal private key (p,g,x).

EGPrivateKey(EGPrivateKey key)
A copy constructor for an ElGamal private key.

Method Summary

java.lang.String	decrypt(java.util.AbstractList cipherText) A method to decrypt the ciphertext cipherText to a string value using this private key.
java.math.BigInteger	decrypt(EGCipherText cipherText) A method to decrypt the ciphertext cipherText to a big integer value using this private key.
java.lang.String	toString() A method to produce a string representation of this private EG key.

Methods inherited from class java.lang.Object

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

Field Detail

_p

protected java.math.BigInteger _p

_g

protected java.math.BigInteger _g

_x

protected java.math.BigInteger _x

Constructor Detail

EGPrivateKey

public EGPrivateKey(java.math.BigInteger p,
                    java.math.BigInteger g,
                    java.math.BigInteger x)
             throws java.lang.Exception

A constructor for an ElGamal private key (p,g,x).

Throws:

Exception.

java.lang.Exception

EGPrivateKey

public EGPrivateKey(EGPrivateKey key)
             throws java.lang.Exception

A copy constructor for an ElGamal private key.

Throws:

Exception.

java.lang.Exception

Method Detail

decrypt

public java.math.BigInteger decrypt(EGCipherText cipherText)
                             throws java.lang.Exception

A method to decrypt the ciphertext cipherText to a big integer value using this private key.

Throws:

Exception.

java.lang.Exception

decrypt

public java.lang.String decrypt(java.util.AbstractList cipherText)
                         throws java.lang.Exception

A method to decrypt the ciphertext cipherText to a string value using this private key.

Throws:

Exception.

java.lang.Exception

toString

public java.lang.String toString()

A method to produce a string representation of this private EG key.

Throws:

Exception.