Package com.exceptionfactory.jagged.framework.crypto

Class HashedDerivedKeyProducer

java.lang.Object

com.exceptionfactory.jagged.framework.crypto.HashedDerivedKeyProducer

public class HashedDerivedKeyProducer
extends Object

Hashed Derived Key Producer using HMAC-based Extract-and-Expand Key Derivation Function described in RFC 5869

Constructor Summary

Constructors

Constructor	Description
HashedDerivedKeyProducer()	Hashed Derived Key Producer default constructor does not set any variables

Method Summary

Modifier and Type	Method	Description
protected byte[]	getDerivedKey(SecretKey inputKey, MacKey saltKey, byte[] info)	Get Derived Key using HKDF-SHA-256 extracted and expanded from input key

Methods inherited from class java.lang.Object

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

Constructor Details

HashedDerivedKeyProducer

public HashedDerivedKeyProducer()

Hashed Derived Key Producer default constructor does not set any variables

Method Details

getDerivedKey

protected byte[] getDerivedKey(SecretKey inputKey,
 MacKey saltKey,
 byte[] info)
                        throws GeneralSecurityException

Get Derived Key using HKDF-SHA-256 extracted and expanded from input key

Parameters:

inputKey - Input Key Material

saltKey - Salt Key with encoded byte array

info - Application Information

Returns:

Key derived from RFC 5869 Sections 2.2 and 2.3 extract and expand

Throws:

GeneralSecurityException - Thrown on key derivation processing failures