org.bouncycastle.jce.provider
Class JCEECDHKeyAgreement

java.lang.Object
  javax.crypto.KeyAgreementSpi
      org.bouncycastle.jce.provider.JCEECDHKeyAgreement

Direct Known Subclasses:

JCEECDHKeyAgreement.DH, JCEECDHKeyAgreement.DHC, JCEECDHKeyAgreement.DHwithSHA1KDF

public class JCEECDHKeyAgreement
extends javax.crypto.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

static class	JCEECDHKeyAgreement.DH
static class	JCEECDHKeyAgreement.DHC
static class	JCEECDHKeyAgreement.DHwithSHA1KDF

Field Summary

private BasicAgreement	agreement
private static java.util.Hashtable	algorithms
private static X9IntegerConverter	converter
private DerivationFunction	kdf
private ECPrivateKeyParameters	privKey
private java.math.BigInteger	result

Constructor Summary

protected	JCEECDHKeyAgreement(BasicAgreement agreement)
protected	JCEECDHKeyAgreement(BasicAgreement agreement, DerivationFunction kdf)

Method Summary

private byte[]	bigIntToBytes(java.math.BigInteger r)
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 java.lang.Object

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

Field Detail

converter

private static final X9IntegerConverter converter

algorithms

private static final java.util.Hashtable algorithms

result

private java.math.BigInteger result

privKey

private ECPrivateKeyParameters privKey

agreement

private BasicAgreement agreement

kdf

private DerivationFunction kdf

Constructor Detail

JCEECDHKeyAgreement

protected JCEECDHKeyAgreement(BasicAgreement agreement)

JCEECDHKeyAgreement

protected JCEECDHKeyAgreement(BasicAgreement agreement,
                              DerivationFunction kdf)

Method Detail

bigIntToBytes

private 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

Specified by:

engineGenerateSecret in class javax.crypto.KeyAgreementSpi

Throws:

java.lang.IllegalStateException

engineGenerateSecret

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

Specified by:

engineGenerateSecret in class javax.crypto.KeyAgreementSpi

Throws:

java.lang.IllegalStateException

javax.crypto.ShortBufferException

engineGenerateSecret

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

Specified by:

engineGenerateSecret in class javax.crypto.KeyAgreementSpi

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