anon.crypto
Class AesEncryption

java.lang.Object
  anon.crypto.AesEncryption

public class AesEncryption
extends java.lang.Object

This class is a wrapper for doing AES encryption stuff.

Field Summary

private org.bouncycastle.crypto.engines.AESFastEngine

m_encryptionInstance Stores the used AES encryption algorithm.

Constructor Summary

AesEncryption(byte[] a_aesKey)
Creates a new instance of AesEncryption.

Method Summary

byte[]

encrypt(byte[] a_plainData) Encrypts one single plain data block and returns the cipher data block.

Methods inherited from class java.lang.Object

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

Field Detail

m_encryptionInstance

private org.bouncycastle.crypto.engines.AESFastEngine m_encryptionInstance

Stores the used AES encryption algorithm.

Constructor Detail

AesEncryption

public AesEncryption(byte[] a_aesKey)
              throws java.lang.Exception

Creates a new instance of AesEncryption. The size of the key must be 16 bytes (128 bit), 24 bytes (192 bit) or 32 bytes (256 bit). If the key size doesn't fit, an exception is thrown.

Parameters:

a_aesKey - The 128 bit or 192 bit or 256 bit AES key.

Throws:

java.lang.Exception

Method Detail

encrypt

public byte[] encrypt(byte[] a_plainData)
               throws java.lang.Exception

Encrypts one single plain data block and returns the cipher data block. The blocksize is always 16 bytes (128 bit). If the plain data block is shorter than 16 bytes, an exception is thrown, if it is longer, only the first 16 bytes are encrypted and returned in the cipher block.

Parameters:

a_plainData - The plain data block.

Returns:

The cipher data block. The length is always 16 bytes.

Throws:

java.lang.Exception