com.google.android.vending.licensing

Interface Obfuscator

All Known Implementing Classes:

AESObfuscator

public interface Obfuscator

Interface used as part of a Policy to allow application authors to obfuscate licensing data that will be stored into a SharedPreferences file.

Any transformation scheme must be reversable. Implementing classes may optionally implement an integrity check to further prevent modification to preference data. Implementing classes should use device-specific information as a key in the obfuscation algorithm to prevent obfuscated preferences from being shared among devices.

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.

Method Detail

obfuscate

String obfuscate(String original,
               String key)

Obfuscate a string that is being stored into shared preferences.

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

String unobfuscate(String obfuscated,
                 String key)
                   throws ValidationException

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

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.

Throws:

ValidationException - Optionally thrown if a data integrity check fails.