Package org.conscrypt

Class OpenSSLBaseDHKeyAgreement<T>

java.lang.Object

javax.crypto.KeyAgreementSpi

org.conscrypt.OpenSSLBaseDHKeyAgreement<T>

Direct Known Subclasses:

OpenSSLECDHKeyAgreement, OpenSSLXDHKeyAgreement

@Internal
public abstract class OpenSSLBaseDHKeyAgreement<T>
extends javax.crypto.KeyAgreementSpi

Generic base classe for Diffie-Hellman style key agreement backed by the OpenSSL engine.

Field Summary

Fields

Modifier and Type	Field	Description
private int	mExpectedResultLength	Expected length (in bytes) of the agreed key (mResult).
private T	mPrivateKey	OpenSSL handle of the private key.
private byte[]	mResult	Agreed key.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	OpenSSLBaseDHKeyAgreement()

Method Summary

Modifier and Type	Method	Description
private void	checkCompleted()
protected abstract int	computeKey(byte[] buffer, T theirPublicKey, T ourPrivateKey)	Given the public key theirPublicKey and the private key ourPrivateKey write the shared secret to buffer and return the actual output size.
protected abstract T	convertPrivateKey(java.security.PrivateKey key)
protected abstract T	convertPublicKey(java.security.PublicKey key)
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.SecureRandom random)
protected void	engineInit(java.security.Key key, java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random)
protected abstract int	getOutputSize(T key)	Returns the expected result length for the given key.

Methods inherited from class java.lang.Object

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

Field Detail

mPrivateKey

private T mPrivateKey

OpenSSL handle of the private key. Only available after the engine has been initialized.

mExpectedResultLength

private int mExpectedResultLength

Expected length (in bytes) of the agreed key (mResult). Only available after the engine has been initialized.

mResult

private byte[] mResult

Agreed key. Only available after engineDoPhase(Key, boolean) completes.

Constructor Detail

OpenSSLBaseDHKeyAgreement

protected OpenSSLBaseDHKeyAgreement()

Method Detail

engineDoPhase

public java.security.Key engineDoPhase(java.security.Key key,
                                       boolean lastPhase)
                                throws java.security.InvalidKeyException

Specified by:

engineDoPhase in class javax.crypto.KeyAgreementSpi

Throws:

java.security.InvalidKeyException

convertPublicKey

protected abstract T convertPublicKey(java.security.PublicKey key)
                               throws java.security.InvalidKeyException

Throws:

java.security.InvalidKeyException

convertPrivateKey

protected abstract T convertPrivateKey(java.security.PrivateKey key)
                                throws java.security.InvalidKeyException

Throws:

java.security.InvalidKeyException

computeKey

protected abstract int computeKey(byte[] buffer,
                                  T theirPublicKey,
                                  T ourPrivateKey)
                           throws java.security.InvalidKeyException

Given the public key theirPublicKey and the private key ourPrivateKey write the shared secret to buffer and return the actual output size.

Throws:

java.security.InvalidKeyException

engineGenerateSecret

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

Specified by:

engineGenerateSecret in class javax.crypto.KeyAgreementSpi

Throws:

javax.crypto.ShortBufferException

engineGenerateSecret

protected byte[] engineGenerateSecret()

Specified by:

engineGenerateSecret in class javax.crypto.KeyAgreementSpi

engineGenerateSecret

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

Specified by:

engineGenerateSecret in class javax.crypto.KeyAgreementSpi

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

getOutputSize

protected abstract int getOutputSize(T key)

Returns the expected result length for the given key.

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

checkCompleted

private void checkCompleted()