check out the below link

check out this link


http://java.sun.com/developer/technicalArticles/Security/pwordmask/

Hi friend,



I am sending running code, please implement this code.

import java.io.*;
import javax.crypto.Cipher;
import javax.crypto.BadPaddingException;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import java.security.Key;
import java.security.InvalidKeyException;

public class EncryptData {
private static String algo = "DESede";

private static Key genkey = null;

private static Cipher cipher = null;



private static void setUp() throws Exception {

genkey = KeyGenerator.getInstance(algo).generateKey();

cipher = Cipher.getInstance(algo);

}





public static void main(String args[]) throws Exception {

String str = "";
setUp();

if (str ==null && str=="") {

System.out.println("Please enter String.");

System.exit(1);

}

byte[] enByte = null;

String inputStr = args[0];

System.out.println("Entered: " + inputStr);

enByte = enDt(inputStr);

String str1 = enByte.toString();

String str2 = dedt(enByte).toString();

System.out.println("Input String: " + inputStr);

System.out.println("Encrypt code: " + str1);

System.out.println("Decrypt code: " + str2);
}



private static byte[] enDt(String inputStr)

throws Exception {

cipher.init(Cipher.ENCRYPT_MODE, genkey);

byte[] inputStrBytes = inputStr.getBytes();

return cipher.doFinal(inputStrBytes);

}



private static String dedt(byte[] enByte)

throws Exception{

cipher.init(Cipher.DECRYPT_MODE, genkey);

byte[] recByte = cipher.doFinal(enByte);

String recovered = new String(recByte);

return recovered;

}

}

-----------------------------------

Thanks.

I am sending running code. If you have any problem then explain in detail.


import java.io.*;

public class PasswordField {

public static String readPassword(String prompt) {
EraserThread eraser = new EraserThread(prompt);
Thread mask = new Thread(eraser);
mask.start();

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
String password = "";

try {
password = in.readLine();
}
catch(IOException ioe) {
ioe.printStackTrace();
}
// stop masking
eraser.stopMasking();
// return the password entered by the user
return password;
}
}

-----------------------------------------

import java.io.*;

class EraserThread implements Runnable {
private boolean stop;

// The prompt displayed to the user

public EraserThread(String prompt) {
System.out.print(prompt);
}

//Begin masking display asterisks (*)

public void run () {
stop = true;
while(stop) {
System.out.print("\010*");
try {
Thread.currentThread().sleep(1);
}
catch(InterruptedException ie) {
ie.printStackTrace();
}
}
}

//Instruct the thread to stop masking

public void stopMasking() {
this.stop = false;
}
}
------------------------------------------

public class TestApp {
public static void main(String args[]) {
String pwd = PasswordField.readPassword("Enter password: ");
System.out.println("The password entered is: "+pwd);
}
}
--------------------------------------

Visit for more information.

http://www.roseindia.net/java/example/java/swing/

Thanks.