info.pppc.base.security.key

Class ECCPublicKey

java.lang.Object

info.pppc.base.security.key.ECCPublicKey

All Implemented Interfaces:

IPublicKey

public class ECCPublicKey
extends java.lang.Object
implements IPublicKey

This class implements an elliptic curve cryptography public key, which can be used for verifying signatures.

Author:

WA

Constructor Summary

Constructors

Constructor and Description
ECCPublicKey(java.security.cert.X509Certificate certificate) Creates a new ECC public key.

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	encryptMessage(byte[] input) Encrypts a message with this public key.
boolean	equals(java.lang.Object obj) Every public key has to implement a comparison operator.
int	hashCode()
boolean	verifySignature(byte[] message, byte[] signature) Use this public key to verify a signature.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ECCPublicKey

public ECCPublicKey(java.security.cert.X509Certificate certificate)

Creates a new ECC public key.

Parameters:

publicKey - The public key parameters which are used for verifying signatures. This ECPublicKeyParameters-object is created using the Bouncycastle library.

Method Detail

encryptMessage

public byte[] encryptMessage(byte[] input)
                      throws java.io.IOException

Description copied from interface: IPublicKey

Encrypts a message with this public key. The encryption could include a header in the returned message, to use hybrid encryption mechanisms.
A message will be encrypted using both asymmetric and symmetric encryption, if the message size exceeds the block size of the asymmetric encryption.
If this is a symmetric key, then always symmetric encryption is used.

Specified by:

encryptMessage in interface IPublicKey

Parameters:

input - The message which should be encrypted

Returns:

The encrypted message, maybe containing a header, as described above

Throws:

java.io.IOException - If not enough memory is available or if a key could not be read, this exception occurs

verifySignature

public boolean verifySignature(byte[] message,
                      byte[] signature)

Description copied from interface: IPublicKey

Use this public key to verify a signature.

Specified by:

verifySignature in interface IPublicKey

Parameters:

message - The message which was signed

signature - The signature of this message

Returns:

True, if the signature is valid, false otherwise

equals

public boolean equals(java.lang.Object obj)

Description copied from interface: IPublicKey

Every public key has to implement a comparison operator. Usually an public key equals another one, if the key is identical. This method must returns true, if the public keys equal each other.

Specified by:

equals in interface IPublicKey

Overrides:

equals in class java.lang.Object

Parameters:

obj - The object of the type AbstractCertificate that should be compared to the current public key

Returns:

True, if the current public key and the given public key are equal, false otherwise

See Also:

Object.equals(java.lang.Object)

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object