| /* |
| * 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. |
| */ |
| |
| /** |
| * @author Boris V. Kuznetsov |
| * @version $Revision$ |
| */ |
| |
| package org.apache.harmony.security.fortress; |
| |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.security.Provider; |
| import java.security.Security; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.harmony.security.Util; |
| |
| |
| /** |
| * This class contains information about all registered providers and preferred |
| * implementations for all "serviceName.algName". |
| * |
| */ |
| |
| public class Services { |
| |
| // The HashMap that contains information about preferred implementations for |
| // all serviceName.algName in the registered providers |
| // BEGIN android-changed |
| // set the initial size to 600 so we don't grow to 1024 by default because |
| // initialization adds a few entries more than the growth threshold. |
| private static final Map<String, Provider.Service> services |
| = new HashMap<String, Provider.Service>(600); |
| // save default SecureRandom service as well. |
| // avoids similar provider/services iteration in SecureRandom constructor |
| private static Provider.Service secureRandom; |
| // END android-changed |
| |
| // Need refresh flag |
| private static boolean needRefresh; // = false; |
| |
| /** |
| * Refresh number |
| */ |
| static int refreshNumber = 1; |
| |
| // Registered providers |
| private static final List<Provider> providers = new ArrayList<Provider>(20); |
| |
| // Hash for quick provider access by name |
| private static final Map<String, Provider> providersNames = new HashMap<String, Provider>(20); |
| |
| static { |
| AccessController.doPrivileged(new PrivilegedAction<Object>() { |
| public Object run() { |
| loadProviders(); |
| return null; |
| } |
| }); |
| } |
| |
| // Load statically registered providers and init Services Info |
| private static void loadProviders() { |
| String providerClassName = null; |
| int i = 1; |
| ClassLoader cl = ClassLoader.getSystemClassLoader(); |
| Provider p; |
| |
| while ((providerClassName = Security.getProperty("security.provider." |
| + i++)) != null) { |
| try { |
| p = (Provider) Class |
| .forName(providerClassName.trim(), true, cl) |
| .newInstance(); |
| providers.add(p); |
| providersNames.put(p.getName(), p); |
| initServiceInfo(p); |
| } catch (ClassNotFoundException e) { // ignore Exceptions |
| } catch (IllegalAccessException e) { |
| } catch (InstantiationException e) { |
| } |
| } |
| Engine.door.renumProviders(); |
| } |
| |
| /** |
| * Returns registered providers |
| * |
| * @return |
| */ |
| public static Provider[] getProviders() { |
| return providers.toArray(new Provider[providers.size()]); |
| } |
| |
| /** |
| * Returns registered providers as List |
| * |
| * @return |
| */ |
| public static List<Provider> getProvidersList() { |
| return new ArrayList<Provider>(providers); |
| } |
| |
| /** |
| * Returns the provider with the specified name |
| * |
| * @param name |
| * @return |
| */ |
| public static Provider getProvider(String name) { |
| if (name == null) { |
| return null; |
| } |
| return providersNames.get(name); |
| } |
| |
| /** |
| * Inserts a provider at a specified position |
| * |
| * @param provider |
| * @param position |
| * @return |
| */ |
| public static int insertProviderAt(Provider provider, int position) { |
| int size = providers.size(); |
| if ((position < 1) || (position > size)) { |
| position = size + 1; |
| } |
| providers.add(position - 1, provider); |
| providersNames.put(provider.getName(), provider); |
| setNeedRefresh(); |
| return position; |
| } |
| |
| /** |
| * Removes the provider |
| * |
| * @param providerNumber |
| */ |
| public static void removeProvider(int providerNumber) { |
| Provider p = providers.remove(providerNumber - 1); |
| providersNames.remove(p.getName()); |
| setNeedRefresh(); |
| } |
| |
| /** |
| * |
| * Adds information about provider services into HashMap. |
| * |
| * @param p |
| */ |
| public static void initServiceInfo(Provider p) { |
| StringBuilder sb = new StringBuilder(128); |
| |
| for (Provider.Service serv : p.getServices()) { |
| String type = serv.getType(); |
| if (secureRandom == null && type.equals("SecureRandom")) { |
| secureRandom = serv; |
| } |
| sb.delete(0, sb.length()); |
| String key = sb.append(type).append(".").append( |
| Util.toUpperCase(serv.getAlgorithm())).toString(); |
| if (!services.containsKey(key)) { |
| services.put(key, serv); |
| } |
| for (String alias : Engine.door.getAliases(serv)) { |
| sb.delete(0, sb.length()); |
| key = sb.append(type).append(".").append(Util.toUpperCase(alias)) |
| .toString(); |
| if (!services.containsKey(key)) { |
| services.put(key, serv); |
| } |
| } |
| } |
| } |
| |
| /** |
| * |
| * Updates services hashtable for all registered providers |
| * |
| */ |
| public static void updateServiceInfo() { |
| services.clear(); |
| secureRandom = null; |
| for (Provider p : providers) { |
| initServiceInfo(p); |
| } |
| needRefresh = false; |
| } |
| |
| /** |
| * Returns true if services contain any provider information |
| * @return |
| */ |
| public static boolean isEmpty() { |
| return services.isEmpty(); |
| } |
| |
| /** |
| * Returns service description. |
| * Call refresh() before. |
| * |
| * @param key in the format TYPE.ALGORITHM |
| * @return |
| */ |
| public static Provider.Service getService(String key) { |
| return services.get(key); |
| } |
| |
| /** |
| * Returns the default SecureRandom service description. |
| * Call refresh() before. |
| */ |
| public static Provider.Service getSecureRandomService() { |
| return secureRandom; |
| } |
| |
| /** |
| * Set flag needRefresh |
| * |
| */ |
| public static void setNeedRefresh() { |
| needRefresh = true; |
| } |
| |
| /** |
| * Refresh services info |
| * |
| */ |
| public static void refresh() { |
| if (needRefresh) { |
| refreshNumber++; |
| updateServiceInfo(); |
| } |
| } |
| } |