gnu.crypto.key.rsa
Class GnuRSAPublicKey

java.lang.Object
  gnu.crypto.key.rsa.GnuRSAKey
      gnu.crypto.key.rsa.GnuRSAPublicKey

All Implemented Interfaces:

java.security.Key, java.security.PublicKey, java.security.interfaces.RSAKey, java.security.interfaces.RSAPublicKey, java.io.Serializable

public class GnuRSAPublicKey

extends GnuRSAKey

implements java.security.PublicKey, java.security.interfaces.RSAPublicKey

An object that encapsulates an RSA public key.

References:

1. RSA-PSS Signature Scheme with Appendix, part B.
   Primitive specification and supporting documentation.
   Jakob Jonsson and Burt Kaliski.

Version:

$Revision: 1.2 $

See Also:

Serialized Form

Field Summary

Fields inherited from interface java.security.PublicKey

serialVersionUID

Constructor Summary

GnuRSAPublicKey(java.math.BigInteger n, java.math.BigInteger e)
Trivial constructor.

Method Summary

boolean	equals(java.lang.Object obj) Returns true if the designated object is an instance of this class and has the same RSA parameter values as this one.
byte[]	getEncoded(int format) Returns the encoded form of this public key according to the designated format.
static GnuRSAPublicKey	valueOf(byte[] k) A class method that takes the output of the encodePublicKey() method of an RSA keypair codec object (an instance implementing IKeyPairCodec for RSA keys, and re-constructs an instance of this object.

Methods inherited from class gnu.crypto.key.rsa.GnuRSAKey

getAlgorithm, getE, getEncoded, getFormat, getModulus, getN, getPublicExponent

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.security.Key

getAlgorithm, getEncoded, getFormat

Methods inherited from interface java.security.interfaces.RSAPublicKey

getPublicExponent

Methods inherited from interface java.security.interfaces.RSAKey

getModulus

Constructor Detail

GnuRSAPublicKey

public GnuRSAPublicKey(java.math.BigInteger n,
                       java.math.BigInteger e)

Trivial constructor.

Parameters:

n - the modulus.

e - the public exponent.

Method Detail

valueOf

public static GnuRSAPublicKey valueOf(byte[] k)

A class method that takes the output of the encodePublicKey() method of an RSA keypair codec object (an instance implementing IKeyPairCodec for RSA 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(int format)

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

Specified by:

getEncoded in class GnuRSAKey

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:

RSAKeyPairRawCodec

equals

public boolean equals(java.lang.Object obj)

Returns true if the designated object is an instance of this class and has the same RSA parameter values as this one.

Overrides:

equals in class GnuRSAKey

Parameters:

obj - the other non-null RSA key to compare to.

Returns:

true if the designated object is of the same type and value as this one.