com.google.android.vending.licensing

Class AESObfuscator

java.lang.Object

com.google.android.vending.licensing.AESObfuscator

All Implemented Interfaces:

Obfuscator

public class AESObfuscator
extends Object
implements Obfuscator

An Obfuscator that uses AES to encrypt data.

Constructor Summary

Constructors

Constructor and Description
AESObfuscator(byte[] salt, String applicationId, String deviceId)

Method Summary

Methods

Modifier and Type	Method and Description
String	obfuscate(String original, String key) Obfuscate a string that is being stored into shared preferences.
String	unobfuscate(String obfuscated, String key) Undo the transformation applied to data by the obfuscate() method.

Methods inherited from class java.lang.Object

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

Constructor Detail

AESObfuscator

public AESObfuscator(byte[] salt,
             String applicationId,
             String deviceId)

Parameters:

salt - an array of random bytes to use for each (un)obfuscation

applicationId - application identifier, e.g. the package name

deviceId - device identifier. Use as many sources as possible to create this unique identifier.

Method Detail

obfuscate

public String obfuscate(String original,
               String key)

Description copied from interface: Obfuscator

Obfuscate a string that is being stored into shared preferences.

Specified by:

obfuscate in interface Obfuscator

Parameters:

original - The data that is to be obfuscated.

key - The key for the data that is to be obfuscated.

Returns:

A transformed version of the original data.

unobfuscate

public String unobfuscate(String obfuscated,
                 String key)
                   throws ValidationException

Description copied from interface: Obfuscator

Undo the transformation applied to data by the obfuscate() method.

Specified by:

unobfuscate in interface Obfuscator

key - The key for the data that is to be obfuscated.

Returns:

A transformed version of the original data.

Throws:

ValidationException - Optionally thrown if a data integrity check fails.