gnu.crypto.key.dss

Class DSSPublicKey

Implemented Interfaces:
DSAKey, DSAPublicKey, Key, PublicKey

public class DSSPublicKey
extends DSSKey
implements PublicKey, DSAPublicKey

An object that embodies a DSS (Digital Signature Standard) public key.
Version:
$Revision: 1.2 $
See Also:
getEncoded(int)

Field Summary

Fields inherited from class gnu.crypto.key.dss.DSSKey

g, p, q

Constructor Summary

DSSPublicKey(BigInteger p, BigInteger q, BigInteger g, BigInteger y)
Trivial constructor.

Method Summary

boolean
equals(Object obj)
Returns true if the designated object is an instance of DSAPublicKey and has the same DSS (Digital Signature Standard) parameter values as this one.
byte[]
getEncoded(int format)
Returns the encoded form of this public key according to the designated format.
BigInteger
getY()
static DSSPublicKey
valueOf(byte[] k)
A class method that takes the output of the encodePublicKey() method of a DSS 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.dss.DSSKey

equals, getAlgorithm, getEncoded, getEncoded, getFormat, getParams

Constructor Details

DSSPublicKey

public DSSPublicKey(BigInteger p,
                    BigInteger q,
                    BigInteger g,
                    BigInteger y)
Trivial constructor.
Parameters:
p - the public modulus.
q - the public prime divisor of p-1.
g - a generator of the unique cyclic group Z* p.
y - the public key part.

Method Details

equals

public boolean equals(Object obj)
Returns true if the designated object is an instance of DSAPublicKey and has the same DSS (Digital Signature Standard) parameter values as this one.
Overrides:
equals in interface DSSKey
Parameters:
obj - the other non-null DSS key to compare to.
Returns:
true if the designated object is of the same type and value as this one.

getEncoded

public byte[] getEncoded(int format)
Returns the encoded form of this public key according to the designated format.
Overrides:
getEncoded in interface DSSKey
Parameters:
format - the desired format identifier of the resulting encoding.
Returns:
the byte sequence encoding this key according to the designated format.

getY

public BigInteger getY()

valueOf

public static DSSPublicKey valueOf(byte[] k)
A class method that takes the output of the encodePublicKey() method of a DSS 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.

Copyright © 2001, 2002, 2003 Free Software Foundation, Inc. All Rights Reserved.