/**
* This will execute the given command with given session and session is not closed at the end.
*
* @param commandInfo
* @param session
* @param commandOutput
* @throws SSHApiException
*/
public static Session executeCommand(
CommandInfo commandInfo, Session session, CommandOutput commandOutput)
throws SSHApiException {
String command = commandInfo.getCommand();
Channel channel = null;
try {
if (!session.isConnected()) {
session.connect();
}
channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);
} catch (JSchException e) {
session.disconnect();
throw new SSHApiException("Unable to execute command - ", e);
}
channel.setInputStream(null);
((ChannelExec) channel).setErrStream(commandOutput.getStandardError());
try {
channel.connect();
} catch (JSchException e) {
channel.disconnect();
session.disconnect();
throw new SSHApiException("Unable to retrieve command output. Command - " + command, e);
}
commandOutput.onOutput(channel);
// Only disconnecting the channel, session can be reused
channel.disconnect();
return session;
}
public static void main(String[] arg) {
String xhost = "127.0.0.1";
int xport = 0;
try {
JSch jsch = new JSch();
String host = null;
if (arg.length > 0) {
host = arg[0];
} else {
host =
JOptionPane.showInputDialog(
"Enter username@hostname", System.getProperty("user.name") + "@localhost");
}
String user = host.substring(0, host.indexOf('@'));
host = host.substring(host.indexOf('@') + 1);
Session session = jsch.getSession(user, host, 22);
String display =
JOptionPane.showInputDialog("Please enter display name", xhost + ":" + xport);
xhost = display.substring(0, display.indexOf(':'));
xport = Integer.parseInt(display.substring(display.indexOf(':') + 1));
session.setX11Host(xhost);
session.setX11Port(xport + 6000);
// username and password will be given via UserInfo interface.
UserInfo ui = new MyUserInfo();
session.setUserInfo(ui);
session.connect();
Channel channel = session.openChannel("shell");
channel.setXForwarding(true);
channel.setInputStream(System.in);
channel.setOutputStream(System.out);
channel.connect();
} catch (Exception e) {
System.out.println(e);
}
}
public static void main(String[] arg) throws JSchException, InterruptedException {
JSch jsch = new JSch();
String[] proxyInfo = queryUserAndHost("proxy server", arg.length > 0 ? arg[0] : null);
Session gateway = jsch.getSession(proxyInfo[0], proxyInfo[1]);
UserInfo ui = new SwingDialogUserInfo();
gateway.setUserInfo(ui);
gateway.connect();
String[] targetInfo = queryUserAndHost("target server", arg.length > 1 ? arg[1] : null);
Session session = jsch.getSession(targetInfo[0], targetInfo[1]);
session.setProxy(new ProxySSH(gateway));
session.setUserInfo(ui);
System.err.println("connecting session ...");
session.connect();
System.err.println("session connected.");
System.err.println("opening shell channel ...");
Channel channel = session.openChannel("shell");
channel.setOutputStream(System.out, true);
channel.setExtOutputStream(System.err, true);
channel.setInputStream(System.in, true);
channel.connect();
System.err.println("shell channel connected.");
do {
Thread.sleep(100);
} while (!channel.isEOF());
System.err.println("exitcode: " + channel.getExitStatus());
session.disconnect();
Thread.sleep(50);
gateway.disconnect();
}
public void execCmd(String command) {
// BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
// String command = "";
BufferedReader reader = null;
Channel channel = null;
try {
// while ((command = br.readLine()) != null) {
channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);
channel.setInputStream(null);
((ChannelExec) channel).setErrStream(System.err);
channel.connect();
InputStream in = channel.getInputStream();
reader = new BufferedReader(new InputStreamReader(in, Charset.forName(charset)));
String buf = null;
while ((buf = reader.readLine()) != null) {
System.out.println(buf);
}
// }
} catch (IOException e) {
e.printStackTrace();
} catch (JSchException e) {
e.printStackTrace();
} finally {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
channel.disconnect();
session.disconnect();
}
}
/**
* This will not reuse any session, it will create the session and close it at the end
*
* @param commandInfo Encapsulated information about command. E.g :- executable name parameters
* etc ...
* @param serverInfo The SSHing server information.
* @param authenticationInfo Security data needs to be communicated with remote server.
* @param commandOutput The output of the command.
* @param configReader configuration required for ssh/gshissh connection
* @throws SSHApiException throw exception when error occurs
*/
public static void executeCommand(
CommandInfo commandInfo,
ServerInfo serverInfo,
AuthenticationInfo authenticationInfo,
CommandOutput commandOutput,
ConfigReader configReader)
throws SSHApiException {
if (authenticationInfo instanceof GSIAuthenticationInfo) {
System.setProperty(
X509_CERT_DIR,
(String)
((GSIAuthenticationInfo) authenticationInfo).getProperties().get("X509_CERT_DIR"));
}
JSch jsch = new ExtendedJSch();
log.debug(
"Connecting to server - "
+ serverInfo.getHost()
+ ":"
+ serverInfo.getPort()
+ " with user name - "
+ serverInfo.getUserName());
Session session;
try {
session =
jsch.getSession(serverInfo.getUserName(), serverInfo.getHost(), serverInfo.getPort());
} catch (JSchException e) {
throw new SSHApiException(
"An exception occurred while creating SSH session."
+ "Connecting server - "
+ serverInfo.getHost()
+ ":"
+ serverInfo.getPort()
+ " connecting user name - "
+ serverInfo.getUserName(),
e);
}
java.util.Properties config = configReader.getProperties();
session.setConfig(config);
// =============================================================
// Handling vanilla SSH pieces
// =============================================================
if (authenticationInfo instanceof SSHPasswordAuthentication) {
String password =
((SSHPasswordAuthentication) authenticationInfo)
.getPassword(serverInfo.getUserName(), serverInfo.getHost());
session.setUserInfo(new SSHAPIUIKeyboardInteractive(password));
// TODO figure out why we need to set password to session
session.setPassword(password);
} else if (authenticationInfo instanceof SSHPublicKeyFileAuthentication) {
SSHPublicKeyFileAuthentication sshPublicKeyFileAuthentication =
(SSHPublicKeyFileAuthentication) authenticationInfo;
String privateKeyFile =
sshPublicKeyFileAuthentication.getPrivateKeyFile(
serverInfo.getUserName(), serverInfo.getHost());
logDebug("The private key file for vanilla SSH " + privateKeyFile);
String publicKeyFile =
sshPublicKeyFileAuthentication.getPrivateKeyFile(
serverInfo.getUserName(), serverInfo.getHost());
logDebug("The public key file for vanilla SSH " + publicKeyFile);
Identity identityFile;
try {
identityFile = GSISSHIdentityFile.newInstance(privateKeyFile, null, jsch);
} catch (JSchException e) {
throw new SSHApiException(
"An exception occurred while initializing keys using files. "
+ "(private key and public key)."
+ "Connecting server - "
+ serverInfo.getHost()
+ ":"
+ serverInfo.getPort()
+ " connecting user name - "
+ serverInfo.getUserName()
+ " private key file - "
+ privateKeyFile
+ ", public key file - "
+ publicKeyFile,
e);
}
// Add identity to identity repository
GSISSHIdentityRepository identityRepository = new GSISSHIdentityRepository(jsch);
identityRepository.add(identityFile);
// Set repository to session
session.setIdentityRepository(identityRepository);
// Set the user info
SSHKeyPasswordHandler sshKeyPasswordHandler =
new SSHKeyPasswordHandler((SSHKeyAuthentication) authenticationInfo);
session.setUserInfo(sshKeyPasswordHandler);
} else if (authenticationInfo instanceof SSHPublicKeyAuthentication) {
SSHPublicKeyAuthentication sshPublicKeyAuthentication =
(SSHPublicKeyAuthentication) authenticationInfo;
Identity identityFile;
try {
String name = serverInfo.getUserName() + "_" + serverInfo.getHost();
identityFile =
GSISSHIdentityFile.newInstance(
name,
sshPublicKeyAuthentication.getPrivateKey(
serverInfo.getUserName(), serverInfo.getHost()),
sshPublicKeyAuthentication.getPublicKey(
serverInfo.getUserName(), serverInfo.getHost()),
jsch);
} catch (JSchException e) {
throw new SSHApiException(
"An exception occurred while initializing keys using byte arrays. "
+ "(private key and public key)."
+ "Connecting server - "
+ serverInfo.getHost()
+ ":"
+ serverInfo.getPort()
+ " connecting user name - "
+ serverInfo.getUserName(),
e);
}
// Add identity to identity repository
GSISSHIdentityRepository identityRepository = new GSISSHIdentityRepository(jsch);
identityRepository.add(identityFile);
// Set repository to session
session.setIdentityRepository(identityRepository);
// Set the user info
SSHKeyPasswordHandler sshKeyPasswordHandler =
new SSHKeyPasswordHandler((SSHKeyAuthentication) authenticationInfo);
session.setUserInfo(sshKeyPasswordHandler);
}
// Not a good way, but we dont have any choice
if (session instanceof ExtendedSession) {
if (authenticationInfo instanceof GSIAuthenticationInfo) {
((ExtendedSession) session)
.setAuthenticationInfo((GSIAuthenticationInfo) authenticationInfo);
}
}
try {
session.connect();
} catch (JSchException e) {
throw new SSHApiException(
"An exception occurred while connecting to server."
+ "Connecting server - "
+ serverInfo.getHost()
+ ":"
+ serverInfo.getPort()
+ " connecting user name - "
+ serverInfo.getUserName(),
e);
}
String command = commandInfo.getCommand();
Channel channel;
try {
channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);
} catch (JSchException e) {
session.disconnect();
throw new SSHApiException(
"Unable to execute command - "
+ command
+ " on server - "
+ serverInfo.getHost()
+ ":"
+ serverInfo.getPort()
+ " connecting user name - "
+ serverInfo.getUserName(),
e);
}
channel.setInputStream(null);
((ChannelExec) channel).setErrStream(commandOutput.getStandardError());
try {
channel.connect();
} catch (JSchException e) {
channel.disconnect();
session.disconnect();
throw new SSHApiException(
"Unable to retrieve command output. Command - "
+ command
+ " on server - "
+ serverInfo.getHost()
+ ":"
+ serverInfo.getPort()
+ " connecting user name - "
+ serverInfo.getUserName(),
e);
}
commandOutput.onOutput(channel);
channel.disconnect();
session.disconnect();
}
