Package io.getlime.security.powerauth.crypto.lib.generator

Class HashBasedCounter

java.lang.Object

io.getlime.security.powerauth.crypto.lib.generator.HashBasedCounter

All Implemented Interfaces:

Counter

public class HashBasedCounter
extends Object
implements Counter

Implementation of hash based counter.

Author:

Roman Strobl, roman.strobl@wultra.com

Constructor Summary

Constructors

Constructor	Description
HashBasedCounter()

Method Summary

Modifier and Type	Method	Description
byte[]	init()	Generate initial counter data.
byte[]	next(byte[] ctrData)	Generate next counter data by hashing current counter data.

Methods inherited from class java.lang.Object

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

Constructor Details

HashBasedCounter

public HashBasedCounter()

Method Details

init

public byte[] init()
            throws CryptoProviderException

Generate initial counter data.

Specified by:

init in interface Counter

Returns:

Initial counter data.

Throws:

CryptoProviderException - In case key cryptography provider is incorrectly initialized.

next

public byte[] next(byte[] ctrData)

Generate next counter data by hashing current counter data.

Specified by:

next in interface Counter

Parameters:

ctrData - Current counter data.

Returns:

Next counter data.