Getting Error while decrypt a file using Blowfish algorithm

Question

I am using blowfish algorithm for encrypt and decrypt my file. this is my code for encrypting decrypting .
while i am running program i am getting an Exception
Exception in thread "main" javax.crypto.BadPaddingException: Given final block not properly padded
at com.sun.crypto.provider.SunJCE_h.b(DashoA6275)
at com.sun.crypto.provider.SunJCE_h.b(DashoA6275)
at com.sun.crypto.provider.BlowfishCipher.engineDoFinal(DashoA6275)
at javax.crypto.Cipher.doFinal(DashoA12275)
at Blowfishexe.main(Blowfishexe.java:65)
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import java.io.*;
import org.bouncycastle.crypto.CryptoException;
import org.bouncycastle.crypto.KeyGenerationParameters;
import org.bouncycastle.crypto.engines.DESedeEngine;
import org.bouncycastle.crypto.generators.DESedeKeyGenerator;
import org.bouncycastle.crypto.modes.CBCBlockCipher;
import org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher;
import org.bouncycastle.crypto.params.DESedeParameters;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.util.encoders.Hex;
public class Blowfishexe {
public static void main(String[] args) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("Blowfish");
          kgen.init(128);
          String keyfile="C:\\Encryption\\BlowfishKey.dat";
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "Blowfish");
          System.out.println("key"+raw);
               byte[] keyBytes = skey.getEncoded();
               byte[] keyhex = Hex.encode(keyBytes);
               BufferedOutputStream keystream =
new BufferedOutputStream(new FileOutputStream(keyfile));
                    keystream.write(keyhex, 0, keyhex.length);
keystream.flush();
keystream.close();
Cipher cipher = Cipher.getInstance("Blowfish");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
          System.out.println("secretKey"+skeySpec);
FileOutputStream fos=new FileOutputStream("C:\\Encryption\\credit11.txt");
          BufferedReader br=new BufferedReader(new FileReader("C:\\Encryption\\credit.txt"));
          String text=null;
          byte[] plainText=null;
          byte[] cipherText=null;
          while((text=br.readLine())!=null)
          System.out.println(text);
          plainText = text.getBytes();
          cipherText = cipher.doFinal(plainText);
          fos.write(cipherText);
          br.close();
          fos.close();
          cipher.init(Cipher.DECRYPT_MODE, skeySpec);
          FileOutputStream fos1=new FileOutputStream("C:\\Encryption\\BlowfishOutput.txt");
          BufferedReader br1=new BufferedReader(new FileReader("C:\\Encryption\\credit11.txt"));
          String text1=null;
          /*while((text1=br1.readLine())!=null)
               System.out.println("text is"+text1);
               plainText=text1.getBytes("UTF8");
               cipherText=cipher.doFinal(plainText);
               fos1.write(cipherText);
          br1.close();
          fos1.close();
//byte[] encrypted = cipher.doFinal("This is just an example".getBytes());
          //System.out.println("encrypted value"+encrypted);*/
Any one pls tell me how to slove my problem
thanks in advance

Answer 1

hi
i got the solution. its working now
but blowfish key ranges from 56 to448
while i am writing the code as
KeyGenerator keyGenerator = KeyGenerator.getInstance("Blowfish");
keyGenerator.init(448);
this code is generating the key upto 448 bits
but coming to encoding or decode section key length is not accepting
cipher.init(Cipher.ENCRYPT_MODE, key);
Exception in thread "main" java.security.InvalidKeyException: Illegal key size or default parameters
at javax.crypto.Cipher.a(DashoA12275)
at javax.crypto.Cipher.a(DashoA12275)
at javax.crypto.Cipher.a(DashoA12275)
at javax.crypto.Cipher.init(DashoA12275)
at javax.crypto.Cipher.init(DashoA12275)
at Blowfish1.main(Blowfish1.java:46)
i am getting this error
what is the solution for this type of exception.
thank you