at.chrl.nutils.ncrypt

Class CryptEngine

java.lang.Object

at.chrl.nutils.ncrypt.CryptEngine

public class CryptEngine
extends Object

Crypto engine for ecnrypting/decrypting packets, error handling and verifying checksum

Author:

EvilSpirit

Constructor Summary

Constructors

Constructor and Description
CryptEngine() Default constructor.

Method Summary

Modifier and Type	Method and Description
boolean	decrypt(byte[] data, int offset, int length) Decrypt given data
int	encrypt(byte[] data, int offset, int length) Encrypt given data
void	updateKey(byte[] newKey) Update the key for packet encryption/decryption with the Blowfish Cipher

Methods inherited from class java.lang.Object

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

Constructor Detail

CryptEngine

public CryptEngine()

Default constructor. Initialize the Blowfish Cipher with an initial static key to encrypt the first packet sent to the client

Method Detail

updateKey

public void updateKey(byte[] newKey)

Update the key for packet encryption/decryption with the Blowfish Cipher

Parameters:

newKey - new Blowfish Key

decrypt

public boolean decrypt(byte[] data,
                       int offset,
                       int length)

Decrypt given data

Parameters:

data - byte array to be decrypted

offset - byte array offset

length - byte array length

Returns:

true, if decrypted packet has valid checksum, false overwise

encrypt

public int encrypt(byte[] data,
                   int offset,
                   int length)

Encrypt given data

Parameters:

data - byte array to be encrypted

offset - byte array offset

length - byte array length

Returns:

length of encrypted byte array