cms/org.argeo.cms.integration/src/org/argeo/ssh/AbstractSsh.java

   1 package org.argeo.ssh;
   2
   3 import java.io.Console;
   4 import java.io.IOException;
   5 import java.net.URI;
   6 import java.net.URISyntaxException;
   7 import java.util.Arrays;
   8 import java.util.HashSet;
   9 import java.util.Scanner;
  10 import java.util.Set;
  11
  12 import org.apache.sshd.client.SshClient;
  13 import org.apache.sshd.client.channel.ClientChannel;
  14 import org.apache.sshd.client.channel.ClientChannelEvent;
  15 import org.apache.sshd.client.future.ConnectFuture;
  16 import org.apache.sshd.client.session.ClientSession;
  17 import org.apache.sshd.client.subsystem.sftp.fs.SftpFileSystemProvider;
  18 import org.apache.sshd.common.util.io.NoCloseInputStream;
  19 import org.apache.sshd.common.util.io.NoCloseOutputStream;
  20 import org.argeo.api.cms.CmsLog;
  21
  22 @SuppressWarnings("restriction")
  23 abstract class AbstractSsh {
  24         private final static CmsLog log = CmsLog.getLog(AbstractSsh.class);
  25
  26         private static SshClient sshClient;
  27         private static SftpFileSystemProvider sftpFileSystemProvider;
  28
  29         private boolean passwordSet = false;
  30         private ClientSession session;
  31
  32         private SshKeyPair sshKeyPair;
  33
  34         synchronized SshClient getSshClient() {
  35                 if (sshClient == null) {
  36                         long begin = System.currentTimeMillis();
  37                         sshClient = SshClient.setUpDefaultClient();
  38                         sshClient.start();
  39                         long duration = System.currentTimeMillis() - begin;
  40                         if (log.isDebugEnabled())
  41                                 log.debug("SSH client started in " + duration + " ms");
  42                         Runtime.getRuntime().addShutdownHook(new Thread(() -> sshClient.stop(), "Stop SSH client"));
  43                 }
  44                 return sshClient;
  45         }
  46
  47         synchronized SftpFileSystemProvider getSftpFileSystemProvider() {
  48                 if (sftpFileSystemProvider == null) {
  49                         sftpFileSystemProvider = new SftpFileSystemProvider(sshClient);
  50                 }
  51                 return sftpFileSystemProvider;
  52         }
  53
  54         void authenticate() {
  55                 try {
  56                         if (sshKeyPair != null) {
  57                                 session.addPublicKeyIdentity(sshKeyPair.asKeyPair());
  58                         } else {
  59
  60                                 if (!passwordSet) {
  61                                         String password;
  62                                         Console console = System.console();
  63                                         if (console == null) {// IDE
  64                                                 System.out.print("Password: ");
  65                                                 try (Scanner s = new Scanner(System.in)) {
  66                                                         password = s.next();
  67                                                 }
  68                                         } else {
  69                                                 console.printf("Password: ");
  70                                                 char[] pwd = console.readPassword();
  71                                                 password = new String(pwd);
  72                                                 Arrays.fill(pwd, ' ');
  73                                         }
  74                                         session.addPasswordIdentity(password);
  75                                         passwordSet = true;
  76                                 }
  77                         }
  78                         session.auth().verify(1000l);
  79                 } catch (IOException e) {
  80                         throw new IllegalStateException(e);
  81                 }
  82         }
  83
  84         void addPassword(String password) {
  85                 session.addPasswordIdentity(password);
  86         }
  87
  88         void loadKey(String password) {
  89                 loadKey(password, System.getProperty("user.home") + "/.ssh/id_rsa");
  90         }
  91
  92         void loadKey(String password, String keyPath) {
  93 //              try {
  94 //                      KeyPair keyPair = ClientIdentityLoader.DEFAULT.loadClientIdentity(keyPath,
  95 //                                      FilePasswordProvider.of(password));
  96 //                      session.addPublicKeyIdentity(keyPair);
  97 //              } catch (IOException | GeneralSecurityException e) {
  98 //                      throw new IllegalStateException(e);
  99 //              }
 100         }
 101
 102         void openSession(URI uri) {
 103                 openSession(uri.getUserInfo(), uri.getHost(), uri.getPort() > 0 ? uri.getPort() : null);
 104         }
 105
 106         void openSession(String login, String host, Integer port) {
 107                 if (session != null)
 108                         throw new IllegalStateException("Session is already open");
 109
 110                 if (host == null)
 111                         host = "localhost";
 112                 if (port == null)
 113                         port = 22;
 114                 if (login == null)
 115                         login = System.getProperty("user.name");
 116                 String password = null;
 117                 int sepIndex = login.indexOf(':');
 118                 if (sepIndex > 0)
 119                         if (sepIndex + 1 < login.length()) {
 120                                 password = login.substring(sepIndex + 1);
 121                                 login = login.substring(0, sepIndex);
 122                         } else {
 123                                 throw new IllegalArgumentException("Illegal authority: " + login);
 124                         }
 125                 try {
 126                         ConnectFuture connectFuture = getSshClient().connect(login, host, port);
 127                         connectFuture.await();
 128                         ClientSession session = connectFuture.getSession();
 129                         if (password != null) {
 130                                 session.addPasswordIdentity(password);
 131                                 passwordSet = true;
 132                         }
 133                         this.session = session;
 134                 } catch (IOException e) {
 135                         throw new IllegalStateException("Cannot connect to " + host + ":" + port);
 136                 }
 137         }
 138
 139         void closeSession() {
 140                 if (session == null)
 141                         throw new IllegalStateException("No session is open");
 142                 try {
 143                         session.close();
 144                 } catch (IOException e) {
 145                         e.printStackTrace();
 146                 } finally {
 147                         session = null;
 148                 }
 149         }
 150
 151         ClientSession getSession() {
 152                 return session;
 153         }
 154
 155         public void setSshKeyPair(SshKeyPair sshKeyPair) {
 156                 this.sshKeyPair = sshKeyPair;
 157         }
 158
 159         public static void openShell(ClientSession session) {
 160                 try (ClientChannel channel = session.createChannel(ClientChannel.CHANNEL_SHELL)) {
 161                         channel.setIn(new NoCloseInputStream(System.in));
 162                         channel.setOut(new NoCloseOutputStream(System.out));
 163                         channel.setErr(new NoCloseOutputStream(System.err));
 164                         channel.open();
 165
 166                         Set<ClientChannelEvent> events = new HashSet<>();
 167                         events.add(ClientChannelEvent.CLOSED);
 168                         channel.waitFor(events, 0);
 169                 } catch (IOException e) {
 170                         // TODO Auto-generated catch block
 171                         e.printStackTrace();
 172                 } finally {
 173                         session.close(false);
 174                 }
 175         }
 176
 177         static URI toUri(String username, String host, int port) {
 178                 try {
 179                         if (username == null)
 180                                 username = "root";
 181                         return new URI("ssh://" + username + "@" + host + ":" + port);
 182                 } catch (URISyntaxException e) {
 183                         throw new IllegalArgumentException("Cannot generate SSH URI to " + host + ":" + port + " for " + username,
 184                                         e);
 185                 }
 186         }
 187
 188 }