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cryptix.jce.provider.dh
Class DHKeyAgreement  

java.lang.Object
  javax.crypto.KeyAgreementSpi
      cryptix.jce.provider.dh.DHKeyAgreement

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public final class DHKeyAgreement

extends javax.crypto.KeyAgreementSpi

Diffie-Hellman key agreement, PKCS#3 style.

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Field Summary
private  java.math.BigInteger	masterSecret           Our master secret.
private  int	masterSecretLen
private  java.math.BigInteger	privG           Private key components.
private  java.math.BigInteger	privP           Private key components.
private  java.math.BigInteger	privX           Private key components.
private  int	state           Current state.
private static int	STATE_COMPLETE           Constants for state machine.
private static int	STATE_NEED_PUB_KEY           Constants for state machine.
private static int	STATE_UNINITIALIZED           Constants for state machine.
private static java.math.BigInteger	ZERO           BigInteger constants.

 

Constructor Summary

DHKeyAgreement()           Constructor for use by javax.crypto.KeyAgreement only.

 

Method Summary
protected  java.security.Key	engineDoPhase(java.security.Key key, boolean lastPhase)           This
protected  byte[]	engineGenerateSecret()           Generate the shared secret in a new byte array.
protected  int	engineGenerateSecret(byte[] sharedSecret, int offset)           Generate the shared secret, storing it into the specified array.
protected  javax.crypto.SecretKey	engineGenerateSecret(java.lang.String algorithm)           Generate the shared secret and return it as a javax.crypto.SecretKey.
protected  void	engineInit(java.security.Key key, java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random)           Not yet implemented.
protected  void	engineInit(java.security.Key key, java.security.SecureRandom unused)           Initialize the KeyAgreement with private value x (wrapped in a DHPrivateKey.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

privG

private java.math.BigInteger privG

Private key components.

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privP

private java.math.BigInteger privP

Private key components.

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privX

private java.math.BigInteger privX

Private key components.

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masterSecret

private java.math.BigInteger masterSecret

Our master secret. Under construction during STATE_NEED_PUB_KEY, final if STATE_COMPLETE.

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masterSecretLen

private int masterSecretLen

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STATE_UNINITIALIZED

private static final int STATE_UNINITIALIZED

Constants for state machine.

See Also:

Constant Field Values

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STATE_NEED_PUB_KEY

private static final int STATE_NEED_PUB_KEY

Constants for state machine.

See Also:

Constant Field Values

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STATE_COMPLETE

private static final int STATE_COMPLETE

Constants for state machine.

See Also:

Constant Field Values

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state

private int state

Current state.

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ZERO

private static final java.math.BigInteger ZERO

BigInteger constants.

Constructor Detail

DHKeyAgreement

public DHKeyAgreement()

Constructor for use by javax.crypto.KeyAgreement only.

Method Detail

engineInit

protected void engineInit(java.security.Key key,
                          java.security.SecureRandom unused)
                   throws java.security.InvalidKeyException

Initialize the KeyAgreement with private value x (wrapped in a DHPrivateKey.

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engineInit

protected void engineInit(java.security.Key key,
                          java.security.spec.AlgorithmParameterSpec params,
                          java.security.SecureRandom random)
                   throws java.security.InvalidKeyException,
                          java.security.InvalidAlgorithmParameterException

Not yet implemented.

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engineDoPhase

protected java.security.Key engineDoPhase(java.security.Key key,
                                          boolean lastPhase)
                                   throws java.security.InvalidKeyException,
                                          java.lang.IllegalStateException

This

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engineGenerateSecret

protected byte[] engineGenerateSecret()
                               throws java.lang.IllegalStateException

Description copied from class: javax.crypto.KeyAgreementSpi

Generate the shared secret in a new byte array.

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engineGenerateSecret

protected int engineGenerateSecret(byte[] sharedSecret,
                                   int offset)
                            throws java.lang.IllegalStateException,
                                   javax.crypto.ShortBufferException

Description copied from class: javax.crypto.KeyAgreementSpi

Generate the shared secret, storing it into the specified array.

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engineGenerateSecret

protected javax.crypto.SecretKey engineGenerateSecret(java.lang.String algorithm)
                                               throws java.lang.IllegalStateException,
                                                      java.security.NoSuchAlgorithmException,
                                                      java.security.InvalidKeyException

Description copied from class: javax.crypto.KeyAgreementSpi

Generate the shared secret and return it as a javax.crypto.SecretKey.

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