info.pppc.base.security.key

Class ECCPrivateKey

java.lang.Object

info.pppc.base.security.key.ECCPrivateKey

All Implemented Interfaces:

IPrivateKey

public class ECCPrivateKey
extends java.lang.Object
implements IPrivateKey

This class implements an elliptic curve cryptography private key, which can be used for creating signatures. The standard ASN1 encoding scheme is used for signatures.

Author:

WA

Constructor Summary

Constructors

Constructor and Description
ECCPrivateKey(byte[] privateKey) Creates a new ECC private key.

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	createSignature(byte[] message) Creates a cryptographic signature (with this private key) of a message.
byte[]	decryptMessage(byte[] message) Decrypts an encrypted message (with this private key).
boolean	equals(java.lang.Object obj) Every private key has to implement a comparison operator.

Methods inherited from class java.lang.Object

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

Constructor Detail

ECCPrivateKey

public ECCPrivateKey(byte[] privateKey)
              throws java.io.IOException

Creates a new ECC private key.

Parameters:

privateKey - The private key parameters which are used for signing. This ECPrivateKeyParameters-object is created using the Bouncycastle library.

Throws:

java.io.IOException

Method Detail

createSignature

public byte[] createSignature(byte[] message)

Description copied from interface: IPrivateKey

Creates a cryptographic signature (with this private key) of a message. Normally uses the SHA-1 hash to hash the message, the hash will then be encrypted with the private key (this hash can be decrypted with the public key to verify the message)

Specified by:

createSignature in interface IPrivateKey

Parameters:

message - The message which should be signed

Returns:

An encrypted SHA-1 hash (usually) of the message

decryptMessage

public byte[] decryptMessage(byte[] message)

Description copied from interface: IPrivateKey

Decrypts an encrypted message (with this private key).

Specified by:

decryptMessage in interface IPrivateKey

Parameters:

message - The encrypted message, which should be decrypted

Returns:

The decrypted message, if the message could be successfully decrypted or null otherwise

equals

public boolean equals(java.lang.Object obj)

Description copied from interface: IPrivateKey

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

Specified by:

equals in interface IPrivateKey

Overrides:

equals in class java.lang.Object

Parameters:

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

Returns:

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

See Also:

Object.equals(java.lang.Object)