| /* |
| * 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.util.buffer.keys; |
| |
| import java.security.GeneralSecurityException; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.PublicKey; |
| import java.util.Arrays; |
| import java.util.Collection; |
| |
| import org.apache.sshd.common.util.GenericUtils; |
| import org.apache.sshd.common.util.buffer.Buffer; |
| |
| /** |
| * Parses a raw {@link PublicKey} from a {@link Buffer} |
| * |
| * @param <PUB> Type of {@link PublicKey} being extracted |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public interface BufferPublicKeyParser<PUB extends PublicKey> { |
| |
| BufferPublicKeyParser<PublicKey> EMPTY = new BufferPublicKeyParser<PublicKey>() { |
| @Override |
| public boolean isKeyTypeSupported(String keyType) { |
| return false; |
| } |
| |
| @Override |
| public PublicKey getRawPublicKey(String keyType, Buffer buffer) throws GeneralSecurityException { |
| throw new NoSuchAlgorithmException(keyType); |
| } |
| |
| @Override |
| public String toString() { |
| return "EMPTY"; |
| } |
| }; |
| |
| BufferPublicKeyParser<PublicKey> DEFAULT = aggregate( |
| Arrays.asList( |
| RSABufferPublicKeyParser.INSTANCE, |
| DSSBufferPublicKeyParser.INSTANCE, |
| ECBufferPublicKeyParser.INSTANCE, |
| SkECBufferPublicKeyParser.INSTANCE, |
| ED25519BufferPublicKeyParser.INSTANCE, |
| OpenSSHCertPublicKeyParser.INSTANCE, |
| SkED25519BufferPublicKeyParser.INSTANCE)); |
| |
| /** |
| * @param keyType The key type - e.g., "ssh-rsa", "ssh-dss" |
| * @return {@code true} if this key type is supported by the parser |
| */ |
| boolean isKeyTypeSupported(String keyType); |
| |
| /** |
| * @param keyType The key type - e.g., "ssh-rsa", "ssh-dss" |
| * @param buffer The {@link Buffer} containing the encoded raw public key |
| * @return The decoded {@link PublicKey} |
| * @throws GeneralSecurityException If failed to generate the key |
| */ |
| PUB getRawPublicKey(String keyType, Buffer buffer) throws GeneralSecurityException; |
| |
| static BufferPublicKeyParser<PublicKey> aggregate( |
| Collection<? extends BufferPublicKeyParser<? extends PublicKey>> parsers) { |
| if (GenericUtils.isEmpty(parsers)) { |
| return EMPTY; |
| } |
| |
| return new BufferPublicKeyParser<PublicKey>() { |
| @Override |
| public boolean isKeyTypeSupported(String keyType) { |
| for (BufferPublicKeyParser<? extends PublicKey> p : parsers) { |
| if (p.isKeyTypeSupported(keyType)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public PublicKey getRawPublicKey(String keyType, Buffer buffer) throws GeneralSecurityException { |
| for (BufferPublicKeyParser<? extends PublicKey> p : parsers) { |
| if (p.isKeyTypeSupported(keyType)) { |
| return p.getRawPublicKey(keyType, buffer); |
| } |
| } |
| |
| throw new NoSuchAlgorithmException("No aggregate matcher for " + keyType); |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(parsers); |
| } |
| }; |
| } |
| } |