| /* |
| * 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.common.keyprovider; |
| |
| import java.security.KeyPair; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.TreeMap; |
| import java.util.function.Function; |
| |
| import org.apache.sshd.common.config.keys.KeyUtils; |
| import org.apache.sshd.common.session.SessionContext; |
| import org.apache.sshd.common.util.GenericUtils; |
| import org.apache.sshd.common.util.ValidateUtils; |
| |
| /** |
| * Holds a {@link Map} of {@link String}->{@link KeyPair} where the map key is the type and value is the associated |
| * {@link KeyPair} |
| * |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public class MappedKeyPairProvider implements KeyPairProvider { |
| /** |
| * Transforms a {@link Map} of {@link String}->{@link KeyPair} to a {@link KeyPairProvider} where map key is the |
| * type and value is the associated {@link KeyPair} |
| */ |
| public static final Function<Map<String, KeyPair>, KeyPairProvider> MAP_TO_KEY_PAIR_PROVIDER = MappedKeyPairProvider::new; |
| |
| private final Map<String, KeyPair> pairsMap; |
| |
| public MappedKeyPairProvider(KeyPair... pairs) { |
| this(GenericUtils.isEmpty(pairs) ? Collections.emptyList() : Arrays.asList(pairs)); |
| } |
| |
| public MappedKeyPairProvider(Collection<KeyPair> pairs) { |
| this(mapUniquePairs(pairs)); |
| } |
| |
| public MappedKeyPairProvider(Map<String, KeyPair> pairsMap) { |
| this.pairsMap = ValidateUtils.checkNotNullAndNotEmpty(pairsMap, "No pairs map provided"); |
| } |
| |
| @Override |
| public Iterable<KeyPair> loadKeys(SessionContext session) { |
| return pairsMap.values(); |
| } |
| |
| @Override |
| public KeyPair loadKey(SessionContext session, String type) { |
| return pairsMap.get(type); |
| } |
| |
| @Override |
| public Iterable<String> getKeyTypes(SessionContext session) { |
| return pairsMap.keySet(); |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(pairsMap.keySet()); |
| } |
| |
| public static Map<String, KeyPair> mapUniquePairs(Collection<KeyPair> pairs) { |
| if (GenericUtils.isEmpty(pairs)) { |
| return Collections.emptyMap(); |
| } |
| |
| Map<String, KeyPair> pairsMap = new TreeMap<>(String.CASE_INSENSITIVE_ORDER); |
| for (KeyPair kp : pairs) { |
| String keyType = ValidateUtils.checkNotNullAndNotEmpty(KeyUtils.getKeyType(kp), "Cannot determine key type"); |
| KeyPair prev = pairsMap.put(keyType, kp); |
| ValidateUtils.checkTrue(prev == null, "Multiple keys of type=%s", keyType); |
| } |
| |
| return pairsMap; |
| } |
| } |