: Class ToServerSignature

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org.PingOO.DLAI.PPM.security
Class ToServerSignature

java.lang.Object
  |
  +--org.PingOO.DLAI.PPM.security.ToServerSignature

public final class ToServerSignature
extends java.lang.Object

This class can generate a signature for the messages that are sent to the server.
Generates ans contains teh client's public and private key.

Since:: PingOO 2.0
Version:: 2.0
Author:: Fabrice Bouyé (bouye@cur-archamps.fr)

Field Summary
`private static java.security.Signature`	`dsa` The signature generator.
`private static java.security.PrivateKey`	`privateKey` The private key needed to create the signature.
`private static java.security.PublicKey`	`publicKey` The public key need to verify the signature of the datas.

Constructor Summary
`private`	`ToServerSignature()` Needed to hide the constructor from the outside.

Method Summary
`static byte[]`	`generateSignature(byte[] data)` Signs a message and returns the signature.
`static java.security.PublicKey`	`getPublicKey()` Returns the public key needed to verify the signature..
`private static void`	`initialize()` Initialiazes the public, private keys and the signature.

Methods inherited from class java.lang.Object

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

Field Detail

publicKey

private static java.security.PublicKey publicKey

The public key need to verify the signature of the datas.

privateKey

private static java.security.PrivateKey privateKey

The private key needed to create the signature.

dsa

private static java.security.Signature dsa

The signature generator.

Constructor Detail

ToServerSignature

private ToServerSignature()

Needed to hide the constructor from the outside.

Method Detail

initialize

private static final void initialize()

Initialiazes the public, private keys and the signature.
Since there are some exceptions to catch, this can't be done automatically.

getPublicKey

public static final java.security.PublicKey getPublicKey()

Returns the public key needed to verify the signature..

Returns:: The public key of the key pair.

generateSignature

public static final byte[] generateSignature(byte[] data)
                                      throws java.lang.NullPointerException

Signs a message and returns the signature.

Parameters:: data - The byte array to be signed.
Returns:: The signature generated from the message.
Throws:: java.lang.NullPointerException - If data is null.