如何在java中为ssh连接设置密码

Question

I want to connect my unix server using java code. first it will connect to my server location. inside that it'll connect to my server name. but at that time it'll ask for confirmation (yes/no) and password I don't know how to do? Here's my code that I have done.please help me out on this

public static void main (String args[]) {
    String user = "user";
    String password = "password";
    String host = "hostName";
    int port=22;

    //String remoteFile="/home/john/test.txt";
    //String yes="yes";

    try {
        JSch jsch = new JSch();
        Session session = jsch.getSession(user, host, port);
        session.setPassword(password);
        session.setConfig("StrictHostKeyChecking", "no");
        System.out.println("Establishing Connection...");
        session.connect();
        Channel channel = session.openChannel("exec");

        // After this it'll ask for confirmation and password
        ((ChannelExec)channel).setCommand("ssh myServerName");
        channel.connect();

        InputStream output = channel.getInputStream();

        System.out.println("aafter stream");
        int readByte = output.read();
        StringBuilder outputBuffer = new StringBuilder();
        while (readByte != 0xffffffff) {
            //System.out.println("read byte" + readByte);
            outputBuffer.append((char)readByte);
            readByte = output.read();
        }
        System.out.println(outputBuffer.toString());
        channel.disconnect();
    } catch (Exception e){
        System.err.print("error message" + e);
    }
}

Answer 1

You need to get the OutputStream of JSch secured channel and insert the password in it.

Channel channel = session.openChannel("exec");
        ((ChannelExec) channel).setCommand("sudo -S -p '' " + command);
        channel.setInputStream(null);
        OutputStream out = channel.getOutputStream();
        ((ChannelExec) channel).setErrStream(System.err);
        InputStream in = channel.getInputStream();
        ((ChannelExec) channel).setPty(true);
        channel.connect();
        out.write((password + "\n").getBytes());
        out.flush();

Complete source code here: http://codeflex.co/java-run-sudo-command-on-remote-linux-host/

Answer 2

    try {
    session = jsch.getSession(user, host, port);
}
catch (JSchException e) {
    throw new TransferException("Failed to open session - " + params, e);
}

session.setPassword(password);

//  Create UserInfo instance in order to support SFTP connection to any machine 
//  without a key username and password will be given via UserInfo interface.
UserInfo userInfo = new SftpUserInfo();
session.setUserInfo(userInfo);

try {
    session.connect(connectTimeout);
}
catch (JSchException e) {
    throw new TransferException("Failed to connect to session - " + params, e);
}

boolean isSessionConnected = session.isConnected();

Set the password programmatically like seen above.