javax.crypto

Class ExemptionMechanismSpi


public abstract class ExemptionMechanismSpi
extends Object

The Service Provider Interface (SPI) for the ExemptionMechanism class.
Since:
1.4

Constructor Summary

ExemptionMechanismSpi()
Create a new exemption mechanism SPI.

Method Summary

protected abstract byte[]
engineGenExemptionBlob()
Return a key blob for the key that this mechanism was initialized with.
protected abstract int
engineGenExemptionBlob(byte[] output, int outputOffset)
Generate a key blob for the key that this mechanism was initialized with, storing it into the given byte array.
protected abstract int
engineGetOutputSize(int inputLength)
Get the size of the output blob given an input key size.
protected abstract void
engineInit(Key key)
Initialize this mechanism with a key.
protected abstract void
engineInit(Key key, AlgorithmParameters params)
Initialize this mechanism with a key and parameters.
protected abstract void
engineInit(Key key, AlgorithmParameterSpec params)
Initialize this mechanism with a key and parameters.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ExemptionMechanismSpi

public ExemptionMechanismSpi()
Create a new exemption mechanism SPI.

Method Details

engineGenExemptionBlob

protected abstract byte[] engineGenExemptionBlob()
            throws ExemptionMechanismException
Return a key blob for the key that this mechanism was initialized with.
Returns:
The key blob.
Throws:
ExemptionMechanismException - If generating the blob fails.

engineGenExemptionBlob

protected abstract int engineGenExemptionBlob(byte[] output,
                                              int outputOffset)
            throws ExemptionMechanismException,
                   ShortBufferException
Generate a key blob for the key that this mechanism was initialized with, storing it into the given byte array.
Parameters:
output - The destination for the key blob.
outputOffset - The index in the output array to start.
Returns:
The size of the key blob.
Throws:
ExemptionMechanismException - If generating the blob fails.
ShortBufferException - If the output array is not large enough for the key blob.

engineGetOutputSize

protected abstract int engineGetOutputSize(int inputLength)
Get the size of the output blob given an input key size. The actual blob may be shorter than the value returned by this method. Both values are in bytes.
Parameters:
inputLength - The input size.
Returns:
The output size.

engineInit

protected abstract void engineInit(Key key)
            throws ExemptionMechanismException,
                   InvalidKeyException
Initialize this mechanism with a key.
Parameters:
key - The key.
Throws:
ExemptionMechanismException - If generating the blob fails.
InvalidKeyException - If the supplied key cannot be used.

engineInit

protected abstract void engineInit(Key key,
                                   AlgorithmParameters params)
            throws ExemptionMechanismException,
                   InvalidAlgorithmParameterException,
                   InvalidKeyException
Initialize this mechanism with a key and parameters.
Parameters:
key - The key.
params - The parameters.
Throws:
ExemptionMechanismException - If generating the blob fails.
InvalidKeyException - If the supplied key cannot be used.

engineInit

protected abstract void engineInit(Key key,
                                   AlgorithmParameterSpec params)
            throws ExemptionMechanismException,
                   InvalidAlgorithmParameterException,
                   InvalidKeyException
Initialize this mechanism with a key and parameters.
Parameters:
key - The key.
params - The parameters.
Throws:
ExemptionMechanismException - If generating the blob fails.
InvalidKeyException - If the supplied key cannot be used.

ExemptionMechanismSpi.java -- Exemption mechanism service provider interface. Copyright (C) 2004 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.