+++ /dev/null
-/* AlgorithmParameters.java --- Algorithm Parameters Implementation Class
- Copyright (C) 1999 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., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 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. */
-
-
-package java.security;
-import java.security.spec.InvalidParameterSpecException;
-import java.security.spec.AlgorithmParameterSpec;
-import java.io.IOException;
-
-/**
- AlgorithmParameters is the Algorithm Parameters class which
- provides an interface through which to modify parameters for
- classes. This class is used to manage the algorithm parameters.
-
- @since JDK 1.2
- @author Mark Benvenuto
- */
-public class AlgorithmParameters
-{
- private AlgorithmParametersSpi paramSpi;
- private Provider provider;
- private String algorithm;
-
- /**
- Creates an instance of AlgorithmParameters
-
- @param paramSpi A parameters engine to use
- @param provider A provider to use
- @param algorithm The algorithm
- */
- protected AlgorithmParameters(AlgorithmParametersSpi paramSpi,
- Provider provider, String algorithm)
- {
- this.paramSpi = paramSpi;
- this.provider = provider;
- this.algorithm = algorithm;
- }
-
- /**
- Returns the name of the algorithm used
-
- @return A string with the name of the algorithm
- */
- public final String getAlgorithm()
- {
- return algorithm;
- }
-
- /**
- Gets an instance of the AlgorithmParameters class representing
- the specified algorithm parameters. If the algorithm is not
- found then, it throws NoSuchAlgorithmException.
-
- The returned AlgorithmParameters must still be intialized with
- init().
-
- @param algorithm the name of algorithm to choose
- @return a AlgorithmParameters repesenting the desired algorithm
-
- @throws NoSuchAlgorithmException if the algorithm is not implemented by providers
- */
- public static AlgorithmParameters getInstance(String algorithm) throws
- NoSuchAlgorithmException
- {
- Provider[] p = Security.getProviders();
-
- for (int i = 0; i < p.length; i++)
- {
- String classname =
- p[i].getProperty("AlgorithmParameters." + algorithm);
- if (classname != null)
- return getInstance(classname, algorithm, p[i]);
- }
-
- throw new NoSuchAlgorithmException(algorithm);
- }
-
- /**
- Gets an instance of the AlgorithmParameters class representing
- the specified algorithm parameters from the specified provider.
- If the algorithm is not found then, it throws
- NoSuchAlgorithmException. If the provider is not found, then
- it throws NoSuchProviderException.
-
- The returned AlgorithmParameters must still be intialized with
- init().
-
- @param algorithm the name of algorithm to choose
- @param provider the name of the provider to find the algorithm in
- @return a AlgorithmParameters repesenting the desired algorithm
-
- @throws NoSuchAlgorithmException if the algorithm is not implemented by the provider
- @throws NoSuchProviderException if the provider is not found
- */
- public static AlgorithmParameters getInstance(String algorithm,
- String provider) throws
- NoSuchAlgorithmException, NoSuchProviderException
- {
- Provider p = Security.getProvider(provider);
- if (p == null)
- throw new NoSuchProviderException();
-
- return getInstance(p.getProperty("AlgorithmParameters." + algorithm),
- algorithm, p);
- }
-
- private static AlgorithmParameters getInstance(String classname,
- String algorithm,
- Provider provider)
- throws NoSuchAlgorithmException
- {
-
- try
- {
- return new AlgorithmParameters((AlgorithmParametersSpi) Class.
- forName(classname).newInstance(),
- provider, algorithm);
- }
- catch (ClassNotFoundException cnfe)
- {
- throw new NoSuchAlgorithmException("Class not found");
- }
- catch (InstantiationException ie)
- {
- throw new NoSuchAlgorithmException("Class instantiation failed");
- }
- catch (IllegalAccessException iae)
- {
- throw new NoSuchAlgorithmException("Illegal Access");
- }
- }
-
- /**
- Gets the provider that the class is from.
-
- @return the provider of this class
- */
- public final Provider getProvider()
- {
- return provider;
- }
-
- /**
- Initializes the engine with the specified
- AlgorithmParameterSpec class.
-
- @param paramSpec A AlgorithmParameterSpec to initialize with
-
- @throws InvalidParameterSpecException For an inapporiate ParameterSpec class
- */
- public final void init(AlgorithmParameterSpec paramSpec) throws
- InvalidParameterSpecException
- {
- paramSpi.engineInit(paramSpec);
- }
-
- /**
- Initializes the engine with the specified
- parameters stored in the byte array and decodes them
- according to the ASN.1 specification. If the ASN.1
- specification exists then it succeeds or else it throws
- IOException.
-
- @param params Parameters to initialize with
-
- @throws IOException Decoding Error
- */
- public final void init(byte[]params) throws IOException
- {
- paramSpi.engineInit(params);
- }
-
- /**
- Initializes the engine with the specified
- parameters stored in the byte array and decodes them
- according to the specified decoding specification.
- If format is null, then it is decoded using the ASN.1
- specification if it exists or else it throws
- IOException.
-
- @param params Parameters to initialize with
- @param format Name of decoding format to use
-
- @throws IOException Decoding Error
- */
- public final void init(byte[]params, String format) throws IOException
- {
- paramSpi.engineInit(params, format);
- }
-
- /**
- Returns a specification of this AlgorithmParameters object.
- paramSpec identifies the class to return the AlgortihmParameters
- in.
-
- @param paramSpec Class to return AlgorithmParameters in
-
- @return the parameter specification
-
- @throws InvalidParameterSpecException if the paramSpec is an invalid parameter class
- */
- public final AlgorithmParameterSpec getParameterSpec(Class paramSpec) throws
- InvalidParameterSpecException
- {
- return paramSpi.engineGetParameterSpec(paramSpec);
- }
-
- /**
- Returns the parameters in the default encoding format.
- The primary encoding format is ASN.1 format if it exists
- for the specified type.
-
- @return byte array representing the parameters
- */
- public final byte[] getEncoded() throws IOException
- {
- return paramSpi.engineGetEncoded();
- }
-
- /**
- Returns the parameters in the specified encoding format.
- If <code>format</code> is <code>null</code> then the
- primary encoding format is used, the ASN.1 format,
- if it exists for the specified type.
-
- @return byte array representing the parameters
- */
- public final byte[] getEncoded(String format) throws IOException
- {
- return paramSpi.engineGetEncoded(format);
- }
-
- /**
- Returns a string representation of the encoding format
-
- @return a string containing the string representation
- */
- public final String toString()
- {
- return paramSpi.engineToString();
- }
-}
projects / msp430-gcc.git / blobdiff