fr.arakne.utils.encoding

Class XorCipher

java.lang.Object

fr.arakne.utils.encoding.XorCipher

public final class XorCipher
extends Object

Implementation of the xor cipher in Dofus 1 Note: This cipher is not secure, the key can be easily retrieved. https://github.com/Emudofus/Dofus/blob/1.29/dofus/aks/Aks.as#L297

Constructor Summary

Constructors

Constructor and Description
XorCipher(@MinLen(value=1) String key)

Method Summary

Modifier and Type	Method and Description
String	decrypt(String value, @NonNegative int keyOffset) Decrypt the value using the current key https://github.com/Emudofus/Dofus/blob/1.29/dofus/aks/Aks.as#L314
String	encrypt(String value, @NonNegative int keyOffset) Encrypt the value using the current key The encrypted value is an upper case hexadecimal string https://github.com/Emudofus/Dofus/blob/1.29/dofus/aks/Aks.as#L297
@MinLen(value=1) String	key() Get the key used by the cipher

Methods inherited from class java.lang.Object

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

Constructor Detail

XorCipher

public XorCipher(@MinLen(value=1) String key)

Method Detail

key

@Pure
public @MinLen(value=1) String key()

Get the key used by the cipher

Returns:

The key

encrypt

@SideEffectFree
public String encrypt(String value,
                                      @NonNegative int keyOffset)

Encrypt the value using the current key The encrypted value is an upper case hexadecimal string https://github.com/Emudofus/Dofus/blob/1.29/dofus/aks/Aks.as#L297

Parameters:

value - Value to encrypt

keyOffset - Offset to use for the key

Returns:

Encrypted value

decrypt

@SideEffectFree
public String decrypt(String value,
                                      @NonNegative int keyOffset)

Decrypt the value using the current key https://github.com/Emudofus/Dofus/blob/1.29/dofus/aks/Aks.as#L314

Parameters:

value - Value to decrypt. Must be a valid hexadecimal string

keyOffset - Offset to use on the key. Must be the same used for encryption.

Returns:

The decrypted value

Throws:

IllegalArgumentException - When an invalid string is given

NumberFormatException - When an invalid hexadecimal string is given