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oracle.security.crypto.core
Class DHKeyAgreement

java.lang.Object
oracle.security.crypto.core.KeyAgreement
oracle.security.crypto.core.DHKeyAgreement

public class DHKeyAgreement

extends KeyAgreement

Implements the Diffie-Hellman algorithm for static shared secret generation, as specified in ANSI X9.42.

To generate a secret key value, the local party private key and the other party public key must be present. If parameters are missing from any of the keys, they should be known from the application envrionment and must be set before using this class.

See Also:

DHKey, DHPublicKey, DHPrivateKey

Constructor Summary

DHKeyAgreement()
Create a new uninitialized instance of DHKeyAgreement.

DHKeyAgreement(DHPrivateKey privKey)
Create a new instance of DHKeyAgreement with the specified local party private key.

DHKeyAgreement(DHPrivateKey privKey, DHPublicKey pubKey)
Create a new instance of DHKeyAgreement with the specified local party private key and the other party public key.

DHKeyAgreement(DHPublicKey pubKey)
Create a new instance of DHKeyAgreement with the specified other party public key.

Method Summary

java.lang.String	algName() Returns the name of the key agreement algorithm.
byte[]	generateSecret() Generate the shared secret value from the local party private key and the other party public key.
AlgorithmIdentifier	getAlgID() Gets the algorithm identifier of this key agreeement.
PublicKey	getPublicKey() Returns the public (other party's) key.
void	setAlgID(AlgorithmIdentifier algID) Sets the algorith identifier of the key agreement object.
void	setPrivateKey(PrivateKey privKey) Sets the local party private key for generating secret value.
void	setPublicKey(PublicKey pubKey) Sets the other party public key for generating secret value.

Methods inherited from class oracle.security.crypto.core.KeyAgreement

getInstance, getInstance, getInstance

Methods inherited from class java.lang.Object

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

Constructor Detail

DHKeyAgreement

public DHKeyAgreement()

Create a new uninitialized instance of DHKeyAgreement.

DHKeyAgreement

public DHKeyAgreement(DHPrivateKey privKey)
               throws InvalidKeyException

Create a new instance of DHKeyAgreement with the specified local party private key.

Parameters:

privKey - The private key for the local party.

Throws:

InvalidKeyException

DHKeyAgreement

public DHKeyAgreement(DHPublicKey pubKey)
               throws InvalidKeyException

Create a new instance of DHKeyAgreement with the specified other party public key.

Parameters:

pubKey - The public key for the other party.

Throws:

InvalidKeyException

DHKeyAgreement

public DHKeyAgreement(DHPrivateKey privKey,
                      DHPublicKey pubKey)
               throws InvalidKeyException

Create a new instance of DHKeyAgreement with the specified local party private key and the other party public key.

Parameters:

privKey - The private key for the local party.

pubKey - The public key for the other party.

Throws:

InvalidKeyException

Method Detail

setAlgID

public void setAlgID(AlgorithmIdentifier algID)
              throws AlgorithmIdentifierException

Description copied from class: KeyAgreement

Sets the algorith identifier of the key agreement object.

Specified by:

setAlgID in class KeyAgreement

Parameters:

algID - The AlgorithmIdentifier to use for this KeyAgreement.

Throws:

AlgorithmIdentifierException

getAlgID

public AlgorithmIdentifier getAlgID()

Description copied from class: KeyAgreement

Gets the algorithm identifier of this key agreeement.

Specified by:

getAlgID in class KeyAgreement

Returns:

An AlgorithmIdentifier representing the algorithm used in this key agreement.

setPrivateKey

public void setPrivateKey(PrivateKey privKey)
                   throws InvalidKeyException

Sets the local party private key for generating secret value.

Specified by:

setPrivateKey in class KeyAgreement

Parameters:

privKey - The private key for the local party.

Throws:

InvalidKeyException

setPublicKey

public void setPublicKey(PublicKey pubKey)
                  throws InvalidKeyException

Sets the other party public key for generating secret value.

Specified by:

setPublicKey in class KeyAgreement

Parameters:

pubKey - The public key of the other party.

Throws:

InvalidKeyException

getPublicKey

public PublicKey getPublicKey()

Returns the public (other party's) key.

Specified by:

getPublicKey in class KeyAgreement

Returns:

The other party's public key.

algName

public java.lang.String algName()

Returns the name of the key agreement algorithm.

Specified by:

algName in class KeyAgreement

Returns:

"Diffie-Hellman"

generateSecret

public byte[] generateSecret()
                      throws KeyAgreementException

Description copied from class: KeyAgreement

Generate the shared secret value from the local party private key and the other party public key.

Specified by:

generateSecret in class KeyAgreement

Throws:

KeyAgreementException

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