net.java.sip.communicator.impl.credentialsstorage
Class AESCrypto

java.lang.Object
  net.java.sip.communicator.impl.credentialsstorage.AESCrypto

All Implemented Interfaces:

Crypto

public class AESCrypto
extends Object
implements Crypto

Performs encryption and decryption of text using AES algorithm.

Author:

Dmitri Melnikov

Constructor Summary

AESCrypto(String masterPassword)
Creates the encryption and decryption objects and the key.

Method Summary

String	decrypt(String ciphertext) Decrypts the cyphertext using the key.
String	encrypt(String plaintext) Encrypts the plaintext using the key.

Methods inherited from class java.lang.Object

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

Constructor Detail

AESCrypto

public AESCrypto(String masterPassword)

Creates the encryption and decryption objects and the key.

Parameters:

masterPassword - used to derive the key. Can be null.

Method Detail

decrypt

public String decrypt(String ciphertext)
               throws CryptoException

Decrypts the cyphertext using the key.

Specified by:

decrypt in interface Crypto

Parameters:

ciphertext - base64 encoded encrypted data

Returns:

decrypted data

Throws:

CryptoException - when the ciphertext cannot be decrypted with the key or on decryption error.

encrypt

public String encrypt(String plaintext)
               throws CryptoException

Encrypts the plaintext using the key.

Specified by:

encrypt in interface Crypto

Parameters:

plaintext - data to be encrypted

Returns:

base64 encoded encrypted data

Throws:

CryptoException - on encryption error