Hermegaas.java

import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;

import org.apache.sshd.SshServer;
import org.apache.sshd.common.Factory;
import org.apache.sshd.server.Command;
import org.apache.sshd.server.Environment;
import org.apache.sshd.server.ExitCallback;
import org.apache.sshd.server.PasswordAuthenticator;
import org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider;
import org.apache.sshd.server.session.ServerSession;

public final class Hermegaas implements Command, Factory<Command>, Runnable, PasswordAuthenticator {
    private final SshServer sshd = SshServer.setUpDefaultServer();
    
    private OutputStream out;
    private InputStream in;
    private OutputStream err;
    private ExitCallback exit;
    
    private boolean loop;
    
    public static void main(String[] args) {
        new Hermegaas();
    }
    
    public Hermegaas() {
        sshd.setPort(8000);
        sshd.setKeyPairProvider(new SimpleGeneratorHostKeyProvider("hostkey.ser"));
        sshd.setShellFactory(this);
        sshd.setPasswordAuthenticator(this);
    }
    
    @Override
    public void run() {
        while (loop) {
            try {
                int c = this.in.read();
                if (c == -1) continue;
                if (c == 'z') this.exit.onExit(0);
                this.out.write(c);
            }
            catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    
    @Override
    public boolean authenticate(String username, String password, ServerSession session) {
        return username.equals("root") && password.equals("toor");
    }
    
    @Override
    public Command create() {
        return this;
    }
    
    @Override
    public void start(Environment env) {
        this.loop = true;
        new Thread(this).start();
    }
    
    @Override
    public void destroy() {
        this.loop = false;
    }
    
    @Override
    public void setOutputStream(OutputStream out) {
        this.out = out;
    }
    
    @Override
    public void setInputStream(InputStream in) {
        this.in = in;
    }
    
    @Override
    public void setErrorStream(OutputStream err) {
        this.err = err;
    }
    
    @Override
    public void setExitCallback(ExitCallback callback) {
        this.exit = callback;
    }
}