| package org.apache.fulcrum.crypto; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import java.security.NoSuchAlgorithmException; |
| import java.util.Hashtable; |
| |
| import org.apache.avalon.framework.activity.Initializable; |
| import org.apache.avalon.framework.configuration.Configurable; |
| import org.apache.avalon.framework.configuration.Configuration; |
| import org.apache.avalon.framework.configuration.ConfigurationException; |
| import org.apache.avalon.framework.logger.AbstractLogEnabled; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| |
| /** |
| * An implementation of CryptoService that uses either supplied crypto |
| * Algorithms (provided in the component config xml file) or tries to get them via |
| * the normal java mechanisms if this fails. |
| * |
| * @author <a href="mailto:epugh@upstate.com">Eric Pugh</a> |
| * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> |
| * @version $Id$ |
| * |
| * @avalon.component name="crypto" lifestyle="singleton" |
| * @avalon.service type="org.apache.fulcrum.crypto.CryptoService" |
| */ |
| public class DefaultCryptoService |
| extends AbstractLogEnabled |
| implements CryptoService, Configurable, Initializable, ThreadSafe |
| { |
| // |
| // SJM: removed Component and Contextualizable, Startable |
| // |
| |
| /** Key Prefix for our algorithms */ |
| private static final String ALGORITHM = "algorithm"; |
| /** Default Key */ |
| private static final String DEFAULT_KEY = "default"; |
| /** Default Encryption Class */ |
| private static final String DEFAULT_CLASS = |
| "org.apache.fulcrum.crypto.provider.JavaCrypt"; |
| /** Names of the registered algorithms and the wanted classes */ |
| private Hashtable algos = null; |
| |
| /** |
| * Returns a CryptoAlgorithm Object which represents the requested |
| * crypto algorithm. |
| * |
| * @param algo Name of the requested algorithm |
| * |
| * @return An Object representing the algorithm |
| * |
| * @throws NoSuchAlgorithmException Requested algorithm is not available |
| * |
| */ |
| public CryptoAlgorithm getCryptoAlgorithm( String algo ) |
| throws NoSuchAlgorithmException |
| { |
| String cryptoClass = (String) algos.get(algo); |
| CryptoAlgorithm ca = null; |
| if (cryptoClass == null) |
| { |
| cryptoClass = (String) algos.get(DEFAULT_KEY); |
| } |
| if (cryptoClass == null || cryptoClass.equalsIgnoreCase("none")) |
| { |
| throw new NoSuchAlgorithmException( |
| "TurbineCryptoService: No Algorithm for " + algo + " found"); |
| } |
| try |
| { |
| //@todo should be created via factory service. |
| //Just trying to get something to work. |
| //ca = (CryptoAlgorithm) factoryService.getInstance(cryptoClass); |
| ca = (CryptoAlgorithm) Class.forName(cryptoClass).newInstance(); |
| } |
| catch (Exception e) |
| { |
| throw new NoSuchAlgorithmException( |
| "TurbineCryptoService: Error instantiating " |
| + cryptoClass + " for " + algo); |
| } |
| ca.setCipher(algo); |
| return ca; |
| } |
| |
| // ---------------- Avalon Lifecycle Methods --------------------- |
| |
| /** |
| * Avalon component lifecycle method |
| */ |
| public void configure(Configuration conf) throws ConfigurationException |
| { |
| this.algos = new Hashtable(); |
| // Set up default (Can be overridden by default key |
| // from the properties |
| algos.put(DEFAULT_KEY, DEFAULT_CLASS); |
| final Configuration algorithms = conf.getChild(ALGORITHM, false); |
| if (algorithms != null) |
| { |
| Configuration[] nameVal = algorithms.getChildren(); |
| for (int i = 0; i < nameVal.length; i++) |
| { |
| String key = nameVal[i].getName(); |
| String val = nameVal[i].getValue(); |
| // getLogger.debug("Registered " + val |
| // + " for Crypto Algorithm " + key); |
| algos.put(key, val); |
| } |
| } |
| } |
| |
| /** |
| * @see org.apache.avalon.framework.activity.Initializable#initialize() |
| */ |
| public void initialize() |
| throws Exception |
| { |
| getLogger().debug("initialize()"); |
| } |
| |
| /** |
| * Avalon component lifecycle method |
| */ |
| public void dispose() |
| { |
| algos = null; |
| } |
| |
| } |