135 lines
4.3 KiB
Java
135 lines
4.3 KiB
Java
/* AlgorithmParametersSpi.java --- Algorithm Parameters SPI
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Copyright (C) 1999 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., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public License. */
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package java.security;
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import java.security.spec.InvalidParameterSpecException;
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import java.security.spec.AlgorithmParameterSpec;
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import java.io.IOException;
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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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@since JDK 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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@param paramSpec A AlgorithmParameterSpec to initialize with
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@throws InvalidParameterSpecException For an inapporiate ParameterSpec class
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*/
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protected abstract void engineInit(AlgorithmParameterSpec paramSpec) throws
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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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@param params Parameters to initialize with
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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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@param params Parameters to initialize with
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@param format Name of decoding format to use
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@throws IOException Decoding Error
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*/
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protected abstract void engineInit(byte[]params,
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String format) 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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@param paramSpec Class to return AlgorithmParameters in
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@return the parameter specification
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@throws InvalidParameterSpecException if the paramSpec is an invalid parameter class
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*/
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protected abstract AlgorithmParameterSpec engineGetParameterSpec(Class
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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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@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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@return byte array representing the parameters
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*/
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protected abstract byte[] engineGetEncoded(String format) throws
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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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@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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