| /* |
| * 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.deprecated; |
| |
| import java.io.IOException; |
| import java.security.PublicKey; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.apache.sshd.agent.SshAgent; |
| import org.apache.sshd.agent.SshAgentFactory; |
| import org.apache.sshd.client.ClientFactoryManager; |
| import org.apache.sshd.client.auth.pubkey.UserAuthPublicKeyFactory; |
| import org.apache.sshd.client.session.ClientSession; |
| import org.apache.sshd.client.session.ClientSessionImpl; |
| import org.apache.sshd.common.SshConstants; |
| import org.apache.sshd.common.config.keys.KeyUtils; |
| import org.apache.sshd.common.kex.KeyExchange; |
| import org.apache.sshd.common.util.buffer.Buffer; |
| import org.apache.sshd.common.util.buffer.ByteArrayBuffer; |
| |
| /** |
| * Authentication delegating to an SSH agent |
| */ |
| // CHECKSTYLE:OFF |
| public class UserAuthAgent extends AbstractUserAuth { |
| |
| private final SshAgent agent; |
| private final Iterator<? extends Map.Entry<PublicKey, String>> keys; |
| |
| public UserAuthAgent(ClientSessionImpl session, String service) throws IOException { |
| super(session, service); |
| ClientFactoryManager factoryManager = session.getFactoryManager(); |
| SshAgentFactory agentFactory = factoryManager.getAgentFactory(); |
| if (agentFactory == null) { |
| throw new IllegalStateException("No ssh agent factory has been configured"); |
| } |
| this.agent = agentFactory.createClient(factoryManager); |
| this.keys = agent.getIdentities().iterator(); |
| } |
| |
| protected void sendNextKey(PublicKey key) throws IOException { |
| ClientSession session = getClientSession(); |
| String service = getService(); |
| try { |
| log.debug("Send SSH_MSG_USERAUTH_REQUEST for publickey"); |
| Buffer buffer = session.createBuffer(SshConstants.SSH_MSG_USERAUTH_REQUEST); |
| buffer.putString(session.getUsername()); |
| buffer.putString(service); |
| buffer.putString(UserAuthPublicKeyFactory.NAME); |
| buffer.putBoolean(true); |
| buffer.putString(KeyUtils.getKeyType(key)); |
| buffer.putPublicKey(key); |
| |
| KeyExchange kexValue = session.getKex(); |
| byte[] hValue = kexValue.getH(); |
| Buffer bs = new ByteArrayBuffer(); |
| bs.putBytes(hValue); |
| bs.putByte(SshConstants.SSH_MSG_USERAUTH_REQUEST); |
| bs.putString(session.getUsername()); |
| bs.putString(service); |
| bs.putString(UserAuthPublicKeyFactory.NAME); |
| bs.putBoolean(true); |
| bs.putString(KeyUtils.getKeyType(key)); |
| bs.putPublicKey(key); |
| |
| String keyType = KeyUtils.getKeyType(key); |
| byte[] contents = bs.getCompactData(); |
| Map.Entry<String, byte[]> result = agent.sign(session, key, keyType, contents); |
| String algo = result.getKey(); |
| byte[] signature = result.getValue(); |
| Buffer bs2 = new ByteArrayBuffer(algo.length() + signature.length + Long.SIZE, false); |
| bs2.putString(algo); |
| bs2.putBytes(signature); |
| buffer.putBytes(bs2.array(), bs2.rpos(), bs2.available()); |
| |
| session.writePacket(buffer); |
| } catch (IOException e) { |
| throw e; |
| } catch (Exception e) { |
| throw new IOException("Error performing public key authentication", e); |
| } |
| } |
| |
| @Override |
| public Result next(Buffer buffer) throws IOException { |
| if (buffer == null) { |
| if (keys.hasNext()) { |
| Map.Entry<PublicKey, String> nextKeyValue = keys.next(); |
| sendNextKey(nextKeyValue.getKey()); |
| return Result.Continued; |
| } else { |
| agent.close(); |
| return Result.Failure; |
| } |
| } else { |
| int cmd = buffer.getUByte(); |
| if (cmd == SshConstants.SSH_MSG_USERAUTH_SUCCESS) { |
| log.info("Received SSH_MSG_USERAUTH_SUCCESS"); |
| agent.close(); |
| return Result.Success; |
| } |
| if (cmd == SshConstants.SSH_MSG_USERAUTH_FAILURE) { |
| String methods = buffer.getString(); |
| boolean partial = buffer.getBoolean(); |
| if (log.isDebugEnabled()) { |
| log.debug("Received SSH_MSG_USERAUTH_FAILURE - partial={}, methods={}", partial, methods); |
| } |
| if (keys.hasNext()) { |
| Map.Entry<PublicKey, String> nextKeyValue = keys.next(); |
| sendNextKey(nextKeyValue.getKey()); |
| return Result.Continued; |
| } else { |
| agent.close(); |
| return Result.Failure; |
| } |
| } else { |
| // TODO: check packets |
| log.info("Received unknown packet: {}", cmd); |
| return Result.Continued; |
| } |
| } |
| } |
| } |
| // CHECKSTYLE:ON |