iaik.security.ec.common

Class X963KeyDerivationFunction

java.lang.Object

iaik.security.ec.common.X963KeyDerivationFunction

All Implemented Interfaces:

KeyDerivationFunction

public final class X963KeyDerivationFunction
extends Object
implements KeyDerivationFunction

Implements the key derivation function (KDF) according to [1] and [2].

References:

[1] ANSI X9.63-2001, "American National Standard for Financial Services - Key Agreement and Key Transport Using Elliptic Curve Cryptography" , November 2001.

[2] Certicom Research. 2009. Standards for Efficient Cryptography - SEC 1: Elliptic Curve Cryptography v2.0

Author:

Christian Hanser

Constructor Summary

Constructors

Constructor and Description
X963KeyDerivationFunction()

Method Summary

Modifier and Type	Method and Description
byte[]	engineGenerateKey(byte[] secret) Derives the symmetric key from a shared secret and returns it.
byte[]	engineGenerateKey(byte[] secret, int keyLength) Derives the symmetric key from a shared secret and returns it.
void	engineInit(KDFParameterSpec params) Initializes this KDF.

Methods inherited from class java.lang.Object

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

Constructor Detail

X963KeyDerivationFunction

public X963KeyDerivationFunction()

Method Detail

engineInit

public void engineInit(KDFParameterSpec params)

Description copied from interface: KeyDerivationFunction

Initializes this KDF.

Specified by:

engineInit in interface KeyDerivationFunction

Parameters:

params - the KDF parameters

engineGenerateKey

public byte[] engineGenerateKey(byte[] secret)

Description copied from interface: KeyDerivationFunction

Derives the symmetric key from a shared secret and returns it.

Specified by:

engineGenerateKey in interface KeyDerivationFunction

Parameters:

secret - the secret, from which the key is going to be derived

Returns:

a byte array holding the derived key

engineGenerateKey

public byte[] engineGenerateKey(byte[] secret,
                                int keyLength)

Description copied from interface: KeyDerivationFunction

Derives the symmetric key from a shared secret and returns it.

Specified by:

engineGenerateKey in interface KeyDerivationFunction

Parameters:

secret - the secret, from which the key is going to be derived

keyLength - the length of the key in bits

Returns:

a byte array holding the derived key