org.bouncycastle.jcajce.provider.asymmetric.dh

Class KeyAgreementSpi

java.lang.Object

javax.crypto.KeyAgreementSpi

org.bouncycastle.jcajce.provider.asymmetric.util.BaseAgreementSpi

org.bouncycastle.jcajce.provider.asymmetric.dh.KeyAgreementSpi

Direct Known Subclasses:

KeyAgreementSpi.DHwithRFC2631KDF

public class KeyAgreementSpi
extends BaseAgreementSpi

Diffie-Hellman key agreement. There's actually a better way of doing this if you are using long term public keys, see the light-weight version for details.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	KeyAgreementSpi.DHwithRFC2631KDF

Field Summary

Fields inherited from class org.bouncycastle.jcajce.provider.asymmetric.util.BaseAgreementSpi

result, ukmParameters

Constructor Summary

Constructors

Constructor and Description
KeyAgreementSpi()
KeyAgreementSpi(String kaAlgorithm, DerivationFunction kdf)

Method Summary

Modifier and Type	Method and Description
protected byte[]	bigIntToBytes(BigInteger r)
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 org.bouncycastle.jcajce.provider.asymmetric.util.BaseAgreementSpi

getAlgorithm, getKeySize, trimZeroes

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyAgreementSpi

public KeyAgreementSpi()

KeyAgreementSpi

public KeyAgreementSpi(String kaAlgorithm,
                       DerivationFunction kdf)

Method Detail

bigIntToBytes

protected byte[] bigIntToBytes(BigInteger r)

Specified by:

bigIntToBytes in class BaseAgreementSpi

engineDoPhase

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

Specified by:

engineDoPhase in class KeyAgreementSpi

Throws:

InvalidKeyException

IllegalStateException

engineGenerateSecret

protected byte[] engineGenerateSecret()
                               throws IllegalStateException

Overrides:

engineGenerateSecret in class BaseAgreementSpi

Throws:

IllegalStateException

engineGenerateSecret

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

Overrides:

engineGenerateSecret in class BaseAgreementSpi

Throws:

IllegalStateException

ShortBufferException

engineGenerateSecret

protected SecretKey engineGenerateSecret(String algorithm)
                                  throws NoSuchAlgorithmException

Overrides:

engineGenerateSecret in class BaseAgreementSpi

Throws:

NoSuchAlgorithmException

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