gnu.crypto.key.dh
Class GnuDHPublicKey

java.lang.Object
  gnu.crypto.key.dh.GnuDHKey
      gnu.crypto.key.dh.GnuDHPublicKey

All Implemented Interfaces:

javax.crypto.interfaces.DHKey, javax.crypto.interfaces.DHPublicKey, java.security.Key, java.security.PublicKey, java.io.Serializable

public class GnuDHPublicKey

extends GnuDHKey

implements javax.crypto.interfaces.DHPublicKey

An implementation of the Diffie-Hellman public key.

Reference:

1. Diffie-Hellman Key Agreement Method
   Eric Rescorla.

Version:

$Revision: 1.2 $

See Also:

Serialized Form

Field Summary

Fields inherited from class gnu.crypto.key.dh.GnuDHKey

g, p, q

Fields inherited from interface java.security.PublicKey

serialVersionUID

Constructor Summary

GnuDHPublicKey(java.math.BigInteger q, java.math.BigInteger p, java.math.BigInteger g, java.math.BigInteger y)

Method Summary

byte[]	getEncoded() Deprecated. see getEncoded(int).
byte[]	getEncoded(int format) Returns the encoded form of this public key according to the designated format.
java.math.BigInteger	getY()
static GnuDHPublicKey	valueOf(byte[] k) A class method that takes the output of the encodePublicKey() method of a DH keypair codec object (an instance implementing IKeyPairCodec for DSS keys, and re-constructs an instance of this object.

Methods inherited from class gnu.crypto.key.dh.GnuDHKey

equals, getAlgorithm, getFormat, getParams, getQ

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.crypto.interfaces.DHKey

getParams

Methods inherited from interface java.security.Key

getAlgorithm, getFormat

Constructor Detail

GnuDHPublicKey

public GnuDHPublicKey(java.math.BigInteger q,
                      java.math.BigInteger p,
                      java.math.BigInteger g,
                      java.math.BigInteger y)

Method Detail

valueOf

public static GnuDHPublicKey valueOf(byte[] k)

A class method that takes the output of the encodePublicKey() method of a DH keypair codec object (an instance implementing IKeyPairCodec for DSS keys, and re-constructs an instance of this object.

Parameters:

k - the contents of a previously encoded instance of this object.

Throws:

java.lang.ArrayIndexOutOfBoundsException - if there is not enough bytes, in k, to represent a valid encoding of an instance of this object.

java.lang.IllegalArgumentException - if the byte sequence does not represent a valid encoding of an instance of this object.

getEncoded

public byte[] getEncoded()

Deprecated. see getEncoded(int).

Specified by:

getEncoded in interface java.security.Key

getY

public java.math.BigInteger getY()

Specified by:

getY in interface javax.crypto.interfaces.DHPublicKey

getEncoded

public byte[] getEncoded(int format)

Returns the encoded form of this public key according to the designated format.

Parameters:

format - the desired format identifier of the resulting encoding.

Returns:

the byte sequence encoding this key according to the designated format.

Throws:

java.lang.IllegalArgumentException - if the format is not supported.

See Also:

DHKeyPairRawCodec