Java Security

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.security.interfaces.RSAPrivateKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.RSAPrivateKeySpec;
import javax.imageio.stream.FileImageInputStream;
import java.security.*;
import java.io.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import sun.misc.*;
import java.lang.*;
 
 
 
public class Securitytest{
 
public static void imageConvert( ) throws Exception {
try{
System.out.println("please select the file to encrypt");
BufferedReader fileInput = new BufferedReader(new InputStreamReader(System.in));
String filetoread = null;
filetoread = fileInput.readLine();
 
System.out.println("please select the file to save to");
BufferedReader fileOutput = new BufferedReader(new InputStreamReader(System.in));
String filetostore = null;
filetostore = fileOutput.readLine();
 
FileImageInputStream input = new FileImageInputStream(new File(filetoread));
ByteArrayOutputStream output = new ByteArrayOutputStream();
PrintStream stream = new PrintStream(output);
byte[] buffer = new byte[1024];
byte[] data = null;
 
int numberBytesRead = 0;
while ((numberBytesRead = input.read(buffer)) != -1)
{
output.write(buffer, 0, numberBytesRead);
}
 
data = output.toByteArray();
 
System.out.println("encrytped" + buffer);
System.out.println("going to encrypt");
byte[] imageOutput = encrypt(data);
System.out.println("back to imageconvert");
System.out.println("encrytped" + buffer);
 
FileOutputStream imageOut = new FileOutputStream(new File(filetostore));
imageOut.write(imageOutput,0,imageOutput.length);
imageOut.close();
 
BASE64Encoder encoder = new BASE64Encoder();
String enc = encoder.encodeBuffer(imageOutput);
FileWriter fw = new FileWriter(filetostore);
fw.write(enc);
fw.close();
 
System.out.println("sent to file");
output.close();
input.close();
 
} catch(Exception ex) {
System.out.println("Exception: " + ex);
ex.printStackTrace();
}
}


public static void byteConvert()throws Exception{
    try{

System.out.println("please select the file to decrypt");
BufferedReader fileInput = new BufferedReader(new InputStreamReader(System.in));
String filetoread = null;
filetoread = fileInput.readLine();

System.out.println("please select the file to save to");
BufferedReader fileOutput = new BufferedReader(new InputStreamReader(System.in));
String filetostore = null;
filetostore = fileOutput.readLine();

FileInputStream fis = new FileInputStream(filetoread);
byte[] decrypt = new byte[fis.available()];
fis.read(decrypt);
fis.close();

String dec = new String(decrypt);

BASE64Decoder decoder = new BASE64Decoder();
byte[] byteSeed = decoder.decodeBuffer(dec);


// FileInputStream input = new FileInputStream(new File(filetoread));
// ByteArrayOutputStream inStream = new ByteArrayOutputStream();
// PrintStream stream = new PrintStream(inStream);
// PrintStream stream = new PrintStream(input);

// BASE64Decoder decoder = new BASE64Decoder();
// String dec = decoder.decodeBuffer(stream);

// String dec = new String(stream);

// byte[] decryptionBytes = inStream;
// byte[] s = decrypt(dec);
// decryptionBytes =(byte [])stream.readStream();
// stream.close();

// for(int i=0; i < decryptionBytes.length; i++)
    // System.out.print(decryptionBytes);


byte[] imageOutput = decrypt(byteSeed);
//byte[] imageOutput = decrypt(decrypt);

FileOutputStream imageOut = new FileOutputStream(new File(filetostore));
imageOut.write(imageOutput,0,imageOutput.length);
imageOut.close();

    }catch(Exception ex) {
System.out.println("Exception: " + ex);
ex.printStackTrace();
}
}





 
//new being used for AES
public static byte[] encrypt(byte[] imageBytes) throws Exception {
 
    
byte[] encrypte = new byte[imageBytes.length];
//System.out.println("Imagebyte length: " + imageBytes.length);


System.out.println("in encrypt");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
SecretKey secretKeySpec = AESkeyGeneration();
//IvParameterSpec ivSpec = new IvParameterSpec();
//Cipher.getIV()
System.out.println("read out" + secretKeySpec);
cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
//byte[] encrypted = cipher.doFinal(imageBytes);
return cipher.doFinal(imageBytes);
//return encrypted;
}
 



public static byte[] decrypt(byte[] bytesIn) throws Exception{

System.out.println("in decrypt");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
System.out.println("cipher instance");
SecretKey secretKeySpec = AESkeyGeneration();
System.out.println("keyRead in");
    
    

//PrivateKey prvk = loadPrvkey();

System.out.println("read out" + secretKeySpec);
cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
System.out.println("Decrypt mode");

return cipher.doFinal(bytesIn);

//byte[] decodeData= cipher.doFinal(bytesIn);
//return decodeData;
}








private static SecretKeySpec AESkeyGeneration() {
 SecretKeySpec secretKeySpec = null; 
try {
   
 KeyGenerator kgen = KeyGenerator.getInstance("AES");
 kgen.init(128);
 SecretKey skey = kgen.generateKey();
 byte[] key = skey.getEncoded();
 secretKeySpec = new SecretKeySpec(key, "AES");
 
}catch(Exception e) {
  System.out.println("error in keygen = "+e);
}
  return secretKeySpec;
}
 
public static void main (String[] unused) throws Exception {
 
System.out.println("***********************************************");
System.out.println("***    Biometric Encrytion Program          ***");
System.out.println("***********************************************");
 
System.out.println("Please select a process");
System.out.println("e for encryption ");
System.out.println("d for decrytion");
 
boolean choose = false;
 
BufferedReader userInput = new BufferedReader(new InputStreamReader(System.in));
String choice = null;
choice = userInput.readLine();
        
if (choose = choice.equals("e")){
    
imageConvert();
    
System.out.println("Encryption");
}
else 
System.out.println("Decryption"); 
    
byteConvert();
}
}