write java program to cipher to encryption-decryption username and password
package com.javapapers.java.security; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.Random; import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.PBEKeySpec; import javax.crypto.spec.PBEParameterSpec; public class FileEncryption { public static void main(String[] args) throws Exception { FileInputStream inFile = new FileInputStream("plainfile.txt"); FileOutputStream outFile = new FileOutputStream("plainfile.des"); String password = "javapapers"; PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray()); SecretKeyFactory secretKeyFactory = SecretKeyFactory .getInstance("PBEWithMD5AndTripleDES"); SecretKey secretKey = secretKeyFactory.generateSecret(pbeKeySpec); byte[] salt = new byte[8]; Random random = new Random(); random.nextBytes(salt); PBEParameterSpec pbeParameterSpec = new PBEParameterSpec(salt, 100); Cipher cipher = Cipher.getInstance("PBEWithMD5AndTripleDES"); cipher.init(Cipher.ENCRYPT_MODE, secretKey, pbeParameterSpec); outFile.write(salt); byte[] input = new byte[64]; int bytesRead; while ((bytesRead = inFile.read(input)) != -1) { byte[] output = cipher.update(input, 0, bytesRead); if (output != null) outFile.write(output); } byte[] output = cipher.doFinal(); if (output != null) outFile.write(output); inFile.close(); outFile.flush(); outFile.close(); } }
