org.spongycastle.jcajce.provider.asymmetric.dh

Class KeyAgreementSpi

java.lang.Object

javax.crypto.KeyAgreementSpi

org.spongycastle.jcajce.provider.asymmetric.util.BaseAgreementSpi

org.spongycastle.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.spongycastle.jcajce.provider.asymmetric.util.BaseAgreementSpi

ukmParameters

Constructor Summary

Constructors

Constructor and Description
KeyAgreementSpi()
KeyAgreementSpi(java.lang.String kaAlgorithm, org.spongycastle.crypto.DerivationFunction kdf)

Method Summary

Modifier and Type	Method and Description
protected byte[]	bigIntToBytes(java.math.BigInteger r)
protected byte[]	calcSecret()
protected java.security.Key	engineDoPhase(java.security.Key key, boolean lastPhase)
protected byte[]	engineGenerateSecret()
protected int	engineGenerateSecret(byte[] sharedSecret, int offset)
protected javax.crypto.SecretKey	engineGenerateSecret(java.lang.String algorithm)
protected void	engineInit(java.security.Key key, java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random)
protected void	engineInit(java.security.Key key, java.security.SecureRandom random)

Methods inherited from class org.spongycastle.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(java.lang.String kaAlgorithm,
                       org.spongycastle.crypto.DerivationFunction kdf)

Method Detail

bigIntToBytes

protected byte[] bigIntToBytes(java.math.BigInteger r)

engineDoPhase

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

Specified by:

engineDoPhase in class javax.crypto.KeyAgreementSpi

Throws:

java.security.InvalidKeyException

java.lang.IllegalStateException

engineGenerateSecret

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

Overrides:

engineGenerateSecret in class BaseAgreementSpi

Throws:

java.lang.IllegalStateException

engineGenerateSecret

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

Overrides:

engineGenerateSecret in class BaseAgreementSpi

Throws:

java.lang.IllegalStateException

javax.crypto.ShortBufferException

engineGenerateSecret

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

Overrides:

engineGenerateSecret in class BaseAgreementSpi

Throws:

java.security.NoSuchAlgorithmException

engineInit

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

Specified by:

engineInit in class javax.crypto.KeyAgreementSpi

Throws:

java.security.InvalidKeyException

java.security.InvalidAlgorithmParameterException

engineInit

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

Specified by:

engineInit in class javax.crypto.KeyAgreementSpi

Throws:

java.security.InvalidKeyException

calcSecret

protected byte[] calcSecret()

Specified by:

calcSecret in class BaseAgreementSpi