Executing windows executables with user Input / Output capabilities

Question

Hi all,
I have a command that I can run on the DOS prompt with following output:
C:>runas /smartcard C:/WINDOWS/SYSTEM32/notepad.exe
Reading smart cards........
Using the card in reader 1.  Enter the PIN:
Attempting to start C:/WINDOWS/SYSTEM32/notepad.exe as user "MyCertificates DN Printed Here" ...Then notepad opens...viola.
Heres the problem I have doing this in Java. I do not know how to tell Java that while reading
the inputStream (of StreamGobbler type) to prompt me for the PIN like above. It just prints everything out above as if
it is text in my IDE.
Here is my code:
import java.io.*;
class StreamGobbler extends Thread
    InputStream is;
    String type;
    StreamGobbler(InputStream is, String type)
        this.is = is;
        this.type = type;
    public void run()
        try
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String line=null;
            while ( (line = br.readLine()) != null)
                System.out.print(type + ">" + line);   
            } catch (IOException ioe)
                ioe.printStackTrace(); 
public class WinCmd {
      * @param args
     public static void main(String[] args) {
                    //cannot have space in front
                    //String adCmd = "cscript.exe C:\\mailEnable.vbs"; //works
                    //String adCmd = "C:/WINDOWS/SYSTEM32/ipconfig.exe"; //works
                    String adCmd = "runas /smartcard C:/WINDOWS/SYSTEM32/notepad.exe";
                        boolean success = false;
                        int exitVal = 1; //0 is success, so we default to a nonzero.
                       try
                           String osName = System.getProperty("os.name" );
                           String[] cmd = new String[3];
                           //specify file to use for NT, XP, and Vista
                           if( osName.equals( "Windows NT" ) || osName.equals( "Windows XP" ) || osName.equals( "Windows Vista" ) || osName.equals("Windows 2003") ){
                               cmd[0] = "cmd.exe";
                           else if ( osName.equals("Windows 95")){
                                cmd[0] = "command.com";
                           else {
                                System.out.println("Must execute from Windows 95, NT, XP, 2003, or Vista system.");
                               System.exit(1);
                           cmd[1] = " /C "; //tells os to terminate process when complete.
                           cmd[2] = adCmd;
                           String[] cmdOther = new String[1];
                           cmdOther[0] = "runas /smartcard";
                           //Execute process
                           //Process proc = Runtime.getRuntime().exec(cmd);
                           Process proc = Runtime.getRuntime().exec(adCmd, cmdOther);
                           // any error message / output?
                           StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR");           
                           StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT");
                           //start output / error catching
                           errorGobbler.start();
                           outputGobbler.start();
                           // wait for process to finish and output exit value.
                           exitVal = proc.waitFor();
                           System.out.println("ExitValue: " + exitVal);
                           System.out.flush();
                           if (exitVal == 0) {
                                success = true;
                           else {
                                success = false;
                       } catch (Exception e) {
                           e.printStackTrace();
     } Here is output:
OUTPUT>Reading smart cards...Using the card in reader 1.  Enter the PIN:...
OUTPUT>
ExitValue: 1This output is what I see from my IDE, Elipse. Only difference is Java never prompted me to enter my PIN, it just output the "OUTPUT" stream as text...
ideas?
SK

Answer 1

Okay, made a little progress.
I created a new subClass called OutputGobbler that should be able to send the pin back to the inputStream of the Process object.
I also created a set / get bean for storing the pin. It all works up till it executes, then I get an ExitValue of 1.
What I think is happening is that the OutputGobbler IS writing the pin correctly...but its just not in the correct format for the
runas executable. This is because the exit value is 1, which means invalid function, which is usually caused by bad syntax.
Here is the updated code, I am posting entire code since much has changed. Output is below.
import java.io.*;
class StreamGobbler extends Thread
    InputStream is;
    String type;
    private String pin;
    StreamGobbler(InputStream is, String type)
        this.is = is;
        this.type = type;
        this.pin = "Hello";
    public String getPin () {
         return this.pin;
    public void setPin (String pin) {
          this.pin = pin;
    public void run()
         try
               String localPin = null;
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String line=null;
            while ( (line = br.readLine()) != null) {
                 //try and find the request for PIN text in the output stream
                int idx = 0;
                idx = line.indexOf("Enter the PIN:");
                //if found prompt user for input.
                  if (idx != -1) { //-1 means no match found.
                       System.out.print("Enter the PIN:");
                       BufferedReader stdin = new BufferedReader( new InputStreamReader( System.in ) );
                       localPin = stdin.readLine();
                       System.out.println("Pin entered: " + localPin);
                       this.setPin(localPin);
                  //System.out.println(type + "--" + line);
        catch (IOException ioe)
          ioe.printStackTrace();
class OutputGobbler extends Thread
    String types;
    OutputStream os;
    String pin;
    OutputGobbler(OutputStream os, String types, String pin)
        this.os = os;
        this.types = types;
        this.pin = pin;
    public void run()
        try
            OutputStreamWriter osw = new OutputStreamWriter(os);
            BufferedWriter bw = new BufferedWriter(osw);
            bw.write(pin);
            bw.newLine();
        catch (Exception ioe)
          ioe.printStackTrace();
public class WinCmd {
      * @param args
     public static void main(String[] args) throws IOException {
                    //cannot have space in front
                    //String adCmd = "runas /smartcard C:/WINDOWS/SYSTEM32/notepad.exe";
                    String adCmd = "C:\\WINDOWS\\SYSTEM32\\runas.exe /smartcard C:\\WINDOWS\\SYSTEM32\\notepad.exe";
                        boolean success = false;
                        int exitVal = 1; //0 is success, so we default to a nonzero.
                       try
                           /*String osName = System.getProperty("os.name" );
                           String[] cmd = new String[3];
                           //specify file to use for NT, XP, and Vista
                           if( osName.equals( "Windows NT" ) || osName.equals( "Windows XP" ) || osName.equals( "Windows Vista" ) || osName.equals("Windows 2003") ){
                               cmd[0] = "cmd.exe";
                           else if ( osName.equals("Windows 95")){
                                cmd[0] = "command.com";
                           else {
                                System.out.println("Must execute from Windows 95, NT, XP, 2003, or Vista system.");
                               System.exit(1);
                           cmd[1] = " /C "; //tells os to terminate process when complete.
                           cmd[2] = adCmd;
                           String[] cmdOther = new String[1];
                           cmdOther[0] = "C:\\WINDOWS\\SYSTEM32\\runas.exe /smartcard";
                           //Execute process
                           //Process proc = Runtime.getRuntime().exec(cmd);
                           Process proc = Runtime.getRuntime().exec(adCmd, cmdOther);
                           // any error message / output?
                           StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR");
                           StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT");
                           //start output / error catching and capture pin
                           errorGobbler.run();
                           outputGobbler.run();
                              //redirection pin to process
                              OutputGobbler oGobbler = new OutputGobbler(proc.getOutputStream(), "INPUT", outputGobbler.getPin());
                              System.out.println("Pin retrieved from getPin: " + outputGobbler.getPin());
                           oGobbler.run();
                           // wait for process to finish and output exit value.
                           exitVal = proc.waitFor();
                           System.out.println("ExitValue: " + exitVal);
                           System.out.flush();
                           if (exitVal == 0) {
                                success = true;
                           else {
                                success = false;
                       } catch (Exception e) {
                           e.printStackTrace();
}Output:
C:\Program Files\Java\jdk1.6.0_05\bin>java -cp "C:\MyJava" WinCmd
Enter the PIN:12345
Pin entered: 12345
Pin retrieved from getPin:12345
ExitValue: 1
C:\Program Files\Java\jdk1.6.0_05\bin>So it seems I can pass the pin between Thread objects successfully. But I do not know how to pass the Operating system the correct
format.
Currently I'm trying "bw.write(pin)" hoping that the pin (as String type) will be put in the correct format, but it is not.
I also tried:
bw.write(pin);
bw.newline();
also
bw.write(pin.toCharArray());
bw.newline();
All give same error of ExitValue 1.
Frustration is setting in...
SK