at.favre.lib.armadillo

Class HkdfXorObfuscator

java.lang.Object

at.favre.lib.armadillo.HkdfXorObfuscator

All Implemented Interfaces:

DataObfuscator

public final class HkdfXorObfuscator
extends java.lang.Object
implements DataObfuscator

A simple obfuscator using HKDF to derive keys for individual blocks and uses a simple version of CTR block mode. Uses XOR as the encryption primitive.

The main design choices for this obfuscator:

• Non-Standard implementation and concept
• Simple and fast (using xor)

This is optimized to be fast and not as secure as possible.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HkdfXorObfuscator.Factory

Method Summary

Modifier and Type	Method and Description
void	clearKey() Clears the internal key reference
void	deobfuscate(byte[] obfuscated) De-Obfuscates the given byte array.
void	obfuscate(byte[] original) Obfuscates the given byte array.

Methods inherited from class java.lang.Object

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

Method Detail

obfuscate

public void obfuscate(byte[] original)

Description copied from interface: DataObfuscator

Obfuscates the given byte array. This will directly use the same array as given by the parameter. The output has the same length as the input.

Specified by:

obfuscate in interface DataObfuscator

Parameters:

original - out parameter

deobfuscate

public void deobfuscate(byte[] obfuscated)

Description copied from interface: DataObfuscator

De-Obfuscates the given byte array. This will directly use the same array as given by the parameter. The output has the same length as the input.

Specified by:

deobfuscate in interface DataObfuscator

Parameters:

obfuscated - out parameter

clearKey

public void clearKey()

Description copied from interface: DataObfuscator

Clears the internal key reference

Specified by:

clearKey in interface DataObfuscator