org.jose4j.jwe.kdf

Class ConcatKeyDerivationFunction

java.lang.Object

org.jose4j.jwe.kdf.ConcatKeyDerivationFunction

All Implemented Interfaces:

ConcatenationKeyDerivationFunctionWithSha256

public class ConcatKeyDerivationFunction
extends Object
implements ConcatenationKeyDerivationFunctionWithSha256

An implementation of Concatenation Key Derivation Function (aka Concat KDF or ConcatKDF) from Section 5.8.1 of National Institute of Standards and Technology (NIST), "Recommendation for Pair-Wise Key Establishment Schemes Using Discrete Logarithm Cryptography", NIST Special Publication 800-56A, Revision 2, May 2013.

Constructor Summary

Constructors

Constructor and Description
ConcatKeyDerivationFunction(String hashAlgoritm)
ConcatKeyDerivationFunction(String hashAlgoritm, String provider)

Method Summary

Modifier and Type	Method and Description
byte[]	kdf(byte[] sharedSecret, int keydatalen, byte[] otherInfo)
byte[]	kdf(byte[] sharedSecret, int keydatalen, byte[] algorithmId, byte[] partyUInfo, byte[] partyVInfo, byte[] suppPubInfo, byte[] suppPrivInfo)

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcatKeyDerivationFunction

public ConcatKeyDerivationFunction(String hashAlgoritm)

ConcatKeyDerivationFunction

public ConcatKeyDerivationFunction(String hashAlgoritm,
                                   String provider)

Method Detail

kdf

public byte[] kdf(byte[] sharedSecret,
                  int keydatalen,
                  byte[] algorithmId,
                  byte[] partyUInfo,
                  byte[] partyVInfo,
                  byte[] suppPubInfo,
                  byte[] suppPrivInfo)

kdf

public byte[] kdf(byte[] sharedSecret,
                  int keydatalen,
                  byte[] otherInfo)

Specified by:

kdf in interface ConcatenationKeyDerivationFunctionWithSha256