150 lines
4.9 KiB
Java
150 lines
4.9 KiB
Java
/* AlgorithmParametersSpi.java --- Algorithm Parameters SPI
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Copyright (C) 1999, 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.security;
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import java.io.IOException;
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import java.security.spec.AlgorithmParameterSpec;
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import java.security.spec.InvalidParameterSpecException;
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/**
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* AlgorithmParametersSpi is the Service Provider Interface
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* for the Algorithm Parameters class. This class is used
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* to manage the algorithm parameters.
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*
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* @since 1.2
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* @author Mark Benvenuto
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*/
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public abstract class AlgorithmParametersSpi
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{
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/**
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* Creates a new instance of AlgorithmParametersSpi
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*/
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public AlgorithmParametersSpi()
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{
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}
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/**
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* Initializes the engine with the specified
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* AlgorithmParameterSpec class.
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*
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* @param paramSpec A AlgorithmParameterSpec to initialize with
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*
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* @throws InvalidParameterSpecException For an inapporiate
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* ParameterSpec class
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*/
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protected abstract void engineInit(AlgorithmParameterSpec paramSpec)
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throws InvalidParameterSpecException;
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/**
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* Initializes the engine with the specified
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* parameters stored in the byte array and decodes them
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* according to the ASN.1 specification. If the ASN.1
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* specification exists then it succeeds or else it throws
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* IOException.
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*
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* @param params Parameters to initialize with
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*
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* @throws IOException Decoding Error
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*/
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protected abstract void engineInit(byte[]params) throws IOException;
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/**
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* Initializes the engine with the specified
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* parameters stored in the byte array and decodes them
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* according to the specified decoding specification.
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* If format is null, then it is decoded using the ASN.1
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* specification if it exists or else it throws
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* IOException.
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*
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* @param params Parameters to initialize with
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* @param format Name of decoding format to use
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*
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* @throws IOException Decoding Error
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*/
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protected abstract void engineInit(byte[]params, String format)
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throws IOException;
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/**
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* Returns a specification of this AlgorithmParameters object.
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* paramSpec identifies the class to return the AlgortihmParameters
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* in.
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*
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* @param paramSpec Class to return AlgorithmParameters in
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*
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* @return the parameter specification
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*
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* @throws InvalidParameterSpecException if the paramSpec is an
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* invalid parameter class
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*/
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protected abstract <T extends AlgorithmParameterSpec>
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T engineGetParameterSpec(Class<T> paramSpec)
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throws InvalidParameterSpecException;
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/**
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* Returns the parameters in the default encoding format.
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* The primary encoding format is ASN.1 format if it exists
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* for the specified type.
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*
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* @return byte array representing the parameters
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*/
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protected abstract byte[] engineGetEncoded() throws IOException;
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/**
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* Returns the parameters in the specified encoding format.
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* If <code>format</code> is <code>null</code> then the
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* primary encoding format is used, the ASN.1 format,
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* if it exists for the specified type.
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*
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* @return byte array representing the parameters
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*/
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protected abstract byte[] engineGetEncoded(String format)
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throws IOException;
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/**
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* Returns a string describing the parameters in the
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* AlgorithmParametersSpi class.
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*
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* @return A string representing the format of the parameters.
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*/
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protected abstract String engineToString();
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}
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