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/*
 * =============================================================================
 * 
 *   Copyright (c) 2007-2010, The JASYPT team (http://www.jasypt.org)
 * 
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 * 
 *       http://www.apache.org/licenses/LICENSE-2.0
 * 
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 * 
 * =============================================================================
 */
package org.jasypt.registry;

import java.security.Security;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;


/**
 * 

* Utility class for retrieving the names of all the digest or encryption * algorithms available to Jasypt. *

*

* This class is thread-safe. *

* * @since 1.7 * * @author Daniel Fernández * */ public final class AlgorithmRegistry { /** *

* Returns a set with the names of all the registered digest algorithms. * This set will also include algorithms from any third-party (non-JVM) registered * providers. *

* * @since 1.7 * * @return a Set of Strings with the names of all the registered * digest algorithms. */ public static Set getAllDigestAlgorithms() { final List algos = new ArrayList(Security.getAlgorithms("MessageDigest")); Collections.sort(algos); return Collections.unmodifiableSet(new LinkedHashSet(algos)); } /** *

* Returns a set with the names of all the registered PBE (Password-Based * Encryption) algorithms. * This set will also include algorithms from any third-party (non-JVM) registered * providers. *

* * @since 1.7 * * @return a Set of Strings with the names of all the registered * PBE algorithms. */ public static Set getAllPBEAlgorithms() { final List algos = new ArrayList(Security.getAlgorithms("Cipher")); Collections.sort(algos); final LinkedHashSet pbeAlgos = new LinkedHashSet(); final Iterator algosIter = algos.iterator(); while (algosIter.hasNext()) { final String algo = (String) algosIter.next(); if (algo != null && algo.startsWith("PBE")) { pbeAlgos.add(algo); } } return Collections.unmodifiableSet(pbeAlgos); } private AlgorithmRegistry() { super(); } }




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