| /* |
| * 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.sshd.server.auth; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.EnumSet; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| import org.apache.sshd.common.Factory; |
| import org.apache.sshd.common.NamedFactory; |
| import org.apache.sshd.common.NamedResource; |
| import org.apache.sshd.common.config.NamedFactoriesListParseResult; |
| import org.apache.sshd.common.util.GenericUtils; |
| import org.apache.sshd.server.auth.gss.UserAuthGSSFactory; |
| import org.apache.sshd.server.auth.hostbased.UserAuthHostBasedFactory; |
| import org.apache.sshd.server.auth.keyboard.UserAuthKeyboardInteractiveFactory; |
| import org.apache.sshd.server.auth.password.UserAuthPasswordFactory; |
| import org.apache.sshd.server.auth.pubkey.UserAuthPublicKeyFactory; |
| |
| /** |
| * Provides a centralized location for the default built-in authentication factories |
| * |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public enum BuiltinUserAuthFactories implements NamedFactory<UserAuthFactory> { |
| PASSWORD(UserAuthPasswordFactory.INSTANCE), |
| PUBLICKEY(UserAuthPublicKeyFactory.INSTANCE), |
| KBINTERACTIVE(UserAuthKeyboardInteractiveFactory.INSTANCE), |
| HOSTBASED(UserAuthHostBasedFactory.INSTANCE), |
| GSS(UserAuthGSSFactory.INSTANCE); |
| |
| public static final Set<BuiltinUserAuthFactories> VALUES = |
| Collections.unmodifiableSet(EnumSet.allOf(BuiltinUserAuthFactories.class)); |
| |
| private final UserAuthFactory factory; |
| |
| BuiltinUserAuthFactories(UserAuthFactory factory) { |
| this.factory = Objects.requireNonNull(factory, "No delegate factory instance"); |
| } |
| |
| @Override |
| public UserAuthFactory create() { |
| return factory; |
| } |
| |
| @Override |
| public String getName() { |
| return factory.getName(); |
| } |
| |
| /** |
| * @param name The factory name (case <U>insensitive</U>) - ignored if {@code null}/empty |
| * @return The matching factory instance - {@code null} if no match found |
| */ |
| public static UserAuthFactory fromFactoryName(String name) { |
| Factory<UserAuthFactory> factory = NamedResource.Utils.findByName(name, String.CASE_INSENSITIVE_ORDER, VALUES); |
| if (factory == null) { |
| return null; |
| } |
| |
| return factory.create(); |
| } |
| |
| /** |
| * @param factories A comma-separated list of factories' names - ignored if {@code null}/empty |
| * @return A {@link ParseResult} containing the successfully parsed |
| * factories and the unknown ones. <B>Note:</B> it is up to caller to |
| * ensure that the lists do not contain duplicates |
| */ |
| public static ParseResult parseFactoriesList(String factories) { |
| return parseFactoriesList(GenericUtils.split(factories, ',')); |
| } |
| |
| public static ParseResult parseFactoriesList(String... factories) { |
| return parseFactoriesList(GenericUtils.isEmpty((Object[]) factories) ? Collections.<String>emptyList() : Arrays.asList(factories)); |
| } |
| |
| public static ParseResult parseFactoriesList(Collection<String> factories) { |
| if (GenericUtils.isEmpty(factories)) { |
| return ParseResult.EMPTY; |
| } |
| |
| List<UserAuthFactory> resolved = new ArrayList<>(factories.size()); |
| List<String> unknown = Collections.emptyList(); |
| for (String name : factories) { |
| UserAuthFactory c = resolveFactory(name); |
| if (c != null) { |
| resolved.add(c); |
| } else { |
| // replace the (unmodifiable) empty list with a real one |
| if (unknown.isEmpty()) { |
| unknown = new ArrayList<>(); |
| } |
| unknown.add(name); |
| } |
| } |
| |
| return new ParseResult(resolved, unknown); |
| } |
| |
| public static UserAuthFactory resolveFactory(String name) { |
| if (GenericUtils.isEmpty(name)) { |
| return null; |
| } |
| |
| return fromFactoryName(name); |
| } |
| |
| /** |
| * Holds the result of {@link BuiltinUserAuthFactories#parseFactoriesList(String)} |
| * |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public static class ParseResult extends NamedFactoriesListParseResult<UserAuth, UserAuthFactory> { |
| public static final ParseResult EMPTY = new ParseResult(Collections.<UserAuthFactory>emptyList(), Collections.<String>emptyList()); |
| |
| public ParseResult(List<UserAuthFactory> parsed, List<String> unsupported) { |
| super(parsed, unsupported); |
| } |
| } |
| } |