Class JCEECDHKeyAgreement

java.lang.Object

javax.crypto.KeyAgreementSpi

org.gudy.bouncycastle.jce.provider.JCEECDHKeyAgreement

Direct Known Subclasses:

JCEECDHKeyAgreement.DH

public class JCEECDHKeyAgreement
extends KeyAgreementSpi

Diffie-Hellman key agreement using elliptic curve keys, ala IEEE P1363 both the simple one, and the simple one with cofactors are supported.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	JCEECDHKeyAgreement.DH

Field Summary

Fields

Modifier and Type	Field	Description
private BasicAgreement	agreement
private CipherParameters	privKey
private BigInteger	result

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	JCEECDHKeyAgreement(BasicAgreement agreement)

Method Summary

Modifier and Type	Method	Description
Key	doPhase(Key key, boolean lastPhase)
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, SecureRandom random)
protected void	engineInit(Key key, AlgorithmParameterSpec params, SecureRandom random)
byte[]	generateSecret()
void	init(Key key)

Methods inherited from class Object

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

Field Details

result

private BigInteger result

privKey

private CipherParameters privKey

agreement

private BasicAgreement agreement

Constructor Details

JCEECDHKeyAgreement

protected JCEECDHKeyAgreement(BasicAgreement agreement)

Method Details

doPhase

public Key doPhase(Key key,
 boolean lastPhase)
            throws InvalidKeyException,
IllegalStateException

Throws:

InvalidKeyException

IllegalStateException

engineDoPhase

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

Specified by:

engineDoPhase in class KeyAgreementSpi

Throws:

InvalidKeyException

IllegalStateException

generateSecret

public byte[] generateSecret()
                      throws IllegalStateException

Throws:

IllegalStateException

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)

Specified by:

engineGenerateSecret in class KeyAgreementSpi

init

public void init(Key key)
          throws InvalidKeyException,
InvalidAlgorithmParameterException

Throws:

InvalidKeyException

InvalidAlgorithmParameterException

engineInit

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

Specified by:

engineInit in class KeyAgreementSpi

Throws:

InvalidKeyException

InvalidAlgorithmParameterException

engineInit

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

Specified by:

engineInit in class KeyAgreementSpi

Throws:

InvalidKeyException