iaik.security.ec.ecdh

Class ECDHKeyAgreement

java.lang.Object

javax.crypto.KeyAgreementSpi

iaik.security.ec.ecdh.ECDHKeyAgreement

public final class ECDHKeyAgreement
extends KeyAgreementSpi

DLSVDP-DH is Discrete Logarithm Secret Value Derivation Primitive, Diffie-Hellman version, compliant with [1, 2].

References: [1] Institute of Electrical and Electronics Engineers (IEEE), Specifications for Public-Key Cryptography, IEEE Standard 1363-2000, August 2000

[2] Institute of Electrical and Electronics Engineers (IEEE), Specifications for Public-Key Cryptography - Amendment 1: Additional Techniques, IEEE Standard 1363a-2004, October 2004

Author:

Christian Hanser

See Also:

ECDHWithCofactorKeyAgreement, ECDHParameterSpec

Constructor Summary

Constructors

Constructor and Description
ECDHKeyAgreement() Creates a new instance.

Method Summary

Modifier and Type	Method and Description
protected Key	engineDoPhase(Key key, boolean lastPhase)
protected byte[]	engineGenerateSecret()
protected int	engineGenerateSecret(byte[] sharedSecret, int offset)
protected SecretKey	engineGenerateSecret(String algorithm)
protected void	engineInit(Key key, AlgorithmParameterSpec params, SecureRandom random)
protected void	engineInit(Key key, SecureRandom random)

Methods inherited from class java.lang.Object

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

Constructor Detail

ECDHKeyAgreement

public ECDHKeyAgreement()

Creates a new instance.

Method Detail

engineDoPhase

protected Key engineDoPhase(Key key,
                            boolean lastPhase)
                     throws InvalidKeyException,
                            IllegalStateException

Specified by:

engineDoPhase in class KeyAgreementSpi

Throws:

InvalidKeyException

IllegalStateException

engineInit

protected void engineInit(Key key,
                          SecureRandom random)
                   throws InvalidKeyException

Specified by:

engineInit in class KeyAgreementSpi

Throws:

InvalidKeyException

engineInit

protected void engineInit(Key key,
                          AlgorithmParameterSpec params,
                          SecureRandom random)
                   throws InvalidKeyException,
                          InvalidAlgorithmParameterException

Specified by:

engineInit in class KeyAgreementSpi

Throws:

InvalidKeyException

InvalidAlgorithmParameterException

engineGenerateSecret

protected byte[] engineGenerateSecret()
                               throws IllegalStateException

Specified by:

engineGenerateSecret in class KeyAgreementSpi

Throws:

IllegalStateException

engineGenerateSecret

protected int engineGenerateSecret(byte[] sharedSecret,
                                   int offset)
                            throws IllegalStateException,
                                   ShortBufferException

Specified by:

engineGenerateSecret in class KeyAgreementSpi

Throws:

IllegalStateException

ShortBufferException

engineGenerateSecret

protected SecretKey engineGenerateSecret(String algorithm)
                                  throws IllegalStateException,
                                         InvalidKeyException

Specified by:

engineGenerateSecret in class KeyAgreementSpi

Throws:

IllegalStateException

InvalidKeyException