2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2018 Samsung Electronics. All rights reserved.
6 * ================================================================================
8 * =============================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
22 * ============LICENSE_END=========================================================
25 package org.onap.ccsdk.sli.adaptors.saltstack.impl;
27 import com.att.eelf.configuration.EELFLogger;
28 import com.att.eelf.configuration.EELFManager;
29 import org.apache.sshd.ClientChannel;
30 import org.apache.sshd.ClientSession;
31 import org.apache.sshd.SshClient;
32 import org.apache.sshd.client.channel.ChannelExec;
33 import org.apache.sshd.client.future.AuthFuture;
34 import org.apache.sshd.client.future.OpenFuture;
35 import org.apache.sshd.common.KeyPairProvider;
36 import org.apache.sshd.common.keyprovider.FileKeyPairProvider;
37 import org.onap.appc.adapter.ssh.Constants;
38 import org.onap.appc.adapter.ssh.SshException;
39 import org.onap.appc.configuration.Configuration;
40 import org.onap.appc.configuration.ConfigurationFactory;
41 import org.onap.appc.encryption.EncryptionTool;
43 import java.io.OutputStream;
44 import java.security.KeyPair;
47 * Implementation of SshConnection interface based on Apache MINA SSHD library.
51 private static final EELFLogger logger = EELFManager.getInstance().getApplicationLogger();
53 private static final long AUTH_TIMEOUT = 60000;
54 private static final long EXEC_TIMEOUT = 120000;
55 private static final Configuration configuration = ConfigurationFactory.getConfiguration();
58 private String username;
59 private String password;
60 private long timeout = EXEC_TIMEOUT;
61 private String keyFile;
62 private SshClient sshClient;
63 private ClientSession clientSession;
65 public SshConnection(String host, int port, String username, String password, String keyFile) {
68 this.username = username;
69 this.password = password;
70 this.keyFile = keyFile;
73 public SshConnection(String host, int port, String username, String password) {
74 this(host, port, username, password, null);
77 public SshConnection(String host, int port, String keyFile) {
78 this(host, port, null, null, keyFile);
81 public void connect() {
82 sshClient = SshClient.setUpDefaultClient();
86 sshClient.connect(EncryptionTool.getInstance().decrypt(username), host, port).await().getSession();
87 if (password != null) {
88 clientSession.addPasswordIdentity(EncryptionTool.getInstance().decrypt(password));
89 } else if (keyFile != null) {
90 KeyPairProvider keyPairProvider = new FileKeyPairProvider(new String[]{
93 KeyPair keyPair = keyPairProvider.loadKeys().iterator().next();
94 clientSession.addPublicKeyIdentity(keyPair);
96 AuthFuture authFuture = clientSession.auth();
97 authFuture.await(AUTH_TIMEOUT);
98 if (!authFuture.isSuccess()) {
99 throw new SshException("Error establishing ssh connection to [" + username + "@" + host + ":" + port
100 + "]. Authentication failed.");
102 } catch (RuntimeException e) {
104 } catch (Exception e) {
105 throw new SshException("Error establishing ssh connection to [" + username + "@" + host + ":" + port + "].",
108 if (logger.isDebugEnabled()) {
109 logger.debug("SSH: connected to [" + toString() + "]");
113 public void connectWithRetry() {
117 retryCount = configuration.getIntegerProperty(Constants.CONNECTION_RETRY_COUNT,
118 Constants.DEFAULT_CONNECTION_RETRY_COUNT);
119 retryDelay = configuration.getIntegerProperty(Constants.CONNECTION_RETRY_DELAY,
120 Constants.DEFAULT_CONNECTION_RETRY_DELAY);
121 retriesLeft = retryCount + 1;
126 } catch (RuntimeException e) {
127 if (retriesLeft > 1) {
128 logger.debug("SSH Connection failed. Waiting for change in server's state.");
129 waitForConnection(retryDelay);
131 logger.debug("Retrying SSH connection. Attempt [" + Integer.toString(retryCount - retriesLeft + 1)
132 + "] out of [" + retryCount + "]");
137 } while (retriesLeft > 0);
140 public void disconnect() {
142 if (logger.isDebugEnabled()) {
143 logger.debug("SSH: disconnecting from [" + toString() + "]");
145 clientSession.close(false);
147 if (sshClient != null) {
153 public void setExecTimeout(long timeout) {
154 this.timeout = timeout;
157 public int execCommand(String cmd, OutputStream out, OutputStream err) {
158 return execCommand(cmd, out, err, false);
161 public int execCommandWithPty(String cmd, OutputStream out) {
162 return execCommand(cmd, out, out, true);
165 private int execCommand(String cmd, OutputStream out, OutputStream err, boolean usePty) {
167 if (logger.isDebugEnabled()) {
168 logger.debug("SSH: executing command");
170 ChannelExec client = clientSession.createExecChannel(cmd);
171 client.setUsePty(usePty); // use pseudo-tty?
174 OpenFuture openFuture = client.open();
177 client.waitFor(ClientChannel.CLOSED, timeout);
179 Integer exitStatusI = client.getExitStatus();
180 if (exitStatusI == null) {
181 throw new SshException("Error executing command [" + cmd + "] over SSH [" + username + "@" + host
182 + ":" + port + "]. Operation timed out.");
184 exitStatus = exitStatusI;
189 } catch (RuntimeException e) {
191 } catch (Exception e1) {
192 throw new SshException(
193 "Error executing command [" + cmd + "] over SSH [" + username + "@" + host + ":" + port + "]", e1);
197 private void waitForConnection(int retryDelay) {
198 long time = retryDelay * 1000L;
199 long future = System.currentTimeMillis() + time;
201 while (System.currentTimeMillis() < future && time > 0) {
204 } catch (InterruptedException e) {
206 * This is rare, but it can happen if another thread interrupts us while we are sleeping. In that
207 * case, the thread is resumed before the delay time has actually expired, so re-calculate the
208 * amount of delay time needed and reenter the sleep until we get to the future time.
210 time = future - System.currentTimeMillis();
217 public String toString() {
218 String address = host;
219 if (username != null) {
220 address = username + '@' + address + ':' + port;