| /* |
| * 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. |
| */ |
| package org.apache.karaf.shell.ssh; |
| |
| import org.apache.sshd.common.NamedFactory; |
| import org.apache.sshd.server.UserAuth; |
| import org.apache.sshd.server.auth.UserAuthPassword; |
| import org.apache.sshd.server.auth.UserAuthPublicKey; |
| import org.osgi.service.blueprint.container.ComponentDefinitionException; |
| import org.osgi.service.blueprint.container.Converter; |
| import org.osgi.service.blueprint.container.ReifiedType; |
| |
| import java.lang.reflect.ParameterizedType; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * <p>A factory for user authentication factories to set on |
| * {@link SshServer#setUserAuthFactories(java.util.List)} based on a |
| * comma-separated list of authentication methods.</p> |
| * |
| * <p>Currently, the following methods are supported:</p> |
| * <ul> |
| * <li><code>password</code> |
| * Password authentication against a given JAAS domain.</p></li> |
| * <li><code>publickey</code> |
| * Public key authentication against an OpenSSH <code>authorized_keys</code> file.</p></li> |
| * </ul> |
| * </p> |
| */ |
| public class UserAuthFactoriesFactory { |
| |
| public static final String PASSWORD_METHOD = "password"; |
| public static final String PUBLICKEY_METHOD = "publickey"; |
| |
| private Set<String> methodSet; |
| private List<NamedFactory<UserAuth>> factories; |
| |
| public static Converter getConverter() { |
| return new Converter(); |
| } |
| |
| /** |
| * This blueprint type converter silently converts instances of |
| * <code>Class X implements NameFactory</code> |
| * to the reified type <code>cNameFactory</code> |
| * and therefore helps blueprint to set the returned factories on |
| * {@link SshServerAction#setUserAuthFactories(List)} without complaining |
| * about type conversion errors. |
| */ |
| public static class Converter implements org.osgi.service.blueprint.container.Converter { |
| |
| public boolean canConvert(Object sourceObject, ReifiedType targetType) { |
| return NamedFactory.class.isAssignableFrom(sourceObject.getClass()) |
| && UserAuth.class.equals(((ParameterizedType) sourceObject.getClass().getGenericInterfaces()[0]).getActualTypeArguments()[0]) |
| && NamedFactory.class.equals(targetType.getRawClass()) |
| && UserAuth.class.equals(targetType.getActualTypeArgument(0).getRawClass()); |
| } |
| |
| public Object convert(Object sourceObject, ReifiedType targetType) throws Exception { |
| return sourceObject; |
| } |
| |
| } |
| |
| public void setAuthMethods(String methods) { |
| this.methodSet = new HashSet<String>(); |
| this.factories = new ArrayList<NamedFactory<UserAuth>>(); |
| String[] ams = methods.split(","); |
| for (String am : ams) { |
| if (PASSWORD_METHOD.equals(am)) { |
| this.factories.add(new UserAuthPassword.Factory()); |
| } else if (PUBLICKEY_METHOD.equals(am)) { |
| this.factories.add(new UserAuthPublicKey.Factory()); |
| } else { |
| throw new ComponentDefinitionException("Invalid authentication method " + am + " specified"); |
| } |
| this.methodSet.add(am); |
| } |
| } |
| |
| public List<NamedFactory<UserAuth>> getFactories() { |
| return factories; |
| } |
| |
| public boolean isPublickeyEnabled() { |
| return this.methodSet.contains(PUBLICKEY_METHOD); |
| } |
| |
| public boolean isPasswordEnabled() { |
| return this.methodSet.contains(PASSWORD_METHOD); |
| } |
| |
| } |