Cannot use blowfish with key size 448 bit length

Question

I can run it with at most 128 bits key size. I have tried it with 256 and 448 bits key size, all are failed. I'm using j2sdk1.4.1_01. How can I fixed this?
import java.io.*;
import javax.crypto.*;
import java.security.*;
public class MBlowfish {
     String m_sKeyFile = "";
     public MBlowfish (String sKeyFile) {
          m_sKeyFile = sKeyFile;
     * method genKey()
     public boolean genKey () {
          try {
               KeyGenerator keygen = KeyGenerator.getInstance ("Blowfish");
               keygen.init (448);
               SecretKey key = keygen.generateKey ();
               ObjectOutputStream keyFile = new ObjectOutputStream (
                    new FileOutputStream (m_sKeyFile)
               keyFile.writeObject (key);
               keyFile.close ();
               return true;
          } catch (Exception e) {
               //System.out.println (e.getMessage ());
               return false;
     * method readKey (String sKeyFile)
     private SecretKey readKey () {
          SecretKey key = null;
          try {
               ObjectInputStream keyFile = new ObjectInputStream (
                    new FileInputStream (m_sKeyFile)
               key = (SecretKey)keyFile.readObject ();
               keyFile.close ();
          } catch (Exception e) {
               //System.out.println (e.getMessage());
          return key;
     public byte[] encrypt (String sInput) {
          Provider sunJce = new com.sun.crypto.provider.SunJCE();
          Security.addProvider (sunJce);
          Cipher cipher = null;
          try {
               cipher = Cipher.getInstance ("Blowfish/ECB/PKCS5Padding");
               cipher.init (Cipher.ENCRYPT_MODE, readKey ());
          } catch (Exception e) {
               System.out.println (e.getMessage());
               return null;
          try {
               ByteArrayOutputStream bos = new ByteArrayOutputStream ();
               ByteArrayInputStream bis = new ByteArrayInputStream (
                    sInput.getBytes());
               CipherOutputStream cos = new CipherOutputStream (
                    bos, cipher);
               int length = 0;
               byte[] buffer = new byte[8192];
               while ((length = bis.read(buffer)) != -1) {
                    cos.write (buffer, 0, length);
               cos.close ();
               bis.close ();
               bos.close ();
               return bos.toByteArray();
          } catch (IOException e) {
               System.out.println (e.getMessage());
               return null;
     public String decrypt (byte[] baInput) {
          Provider sunJce = new com.sun.crypto.provider.SunJCE();
          Security.addProvider (sunJce);
          Cipher cipher = null;
          try {
               cipher = Cipher.getInstance ("Blowfish/ECB/PKCS5Padding");
               cipher.init (Cipher.DECRYPT_MODE, readKey ());
          } catch (Exception e) {
               System.out.println (e.getMessage());
               return null;
          try {
               ByteArrayOutputStream bos = new ByteArrayOutputStream ();
               ByteArrayInputStream bis = new ByteArrayInputStream (
                    baInput);
               CipherOutputStream cos = new CipherOutputStream (
                    bos, cipher);
               int length = 0;
               byte[] buffer = new byte[8192];
               while ((length = bis.read(buffer)) != -1) {
                    cos.write (buffer, 0, length);
               cos.close ();
               bis.close ();
               bos.close ();
               return new String(bos.toByteArray());
          } catch (Exception e) {
               System.out.println (e.getMessage());
               return null;
     public static void main (String args[]) {
          MBlowfish m = new MBlowfish ("BlowfishKey.ser");
          boolean result = m.genKey ();
          if (result) {
               System.out.println ("OK");
          } else {
               System.out.println ("Fail");
          byte[] baEncrypted = m.encrypt ("Hello this is a test message.");
          System.out.println (m.decrypt (baEncrypted));
}

Answer 1

Hi vorrarit,
sorry I couldn't help you. I tried your code one-to-one on my system and everything worked fine, which means that your configuration is somewhat messy.
BTW I read a little about jce and java 1.4.x (for I have java 1.3.06 and extra jce package), the documentation says, the SUN JCE providers are statically preconfigured, so a Security.addProvider(..) is not necessary. Have a look in the java.security file and check if the sun provider is contained. Are you sure, your runtime version points to the directory where the jce is installed, maybe you had installed other java-versions and the pathes got mixed up?
Good luck,
sebastian