Java Cryptographic Extension

Hi Forum,
Just commenced an academic project on Cryptography in Uni today and started studying some materials. I have tried to import SunJCE into my java class by specifying the statement "import com.sun.crypto.provider.SunJCE" in an enclipse work space and I have this error "Access restriction: The type SunJCE is not accessible due to a restriction on required library C:\Program Files\Java\jre6\lib\ext\sunjce-provider.java".
What exactly does this error entail and how can I go about surmounting it?
Cheers!

Why do you think you need that import? If you are using a Sun JDK then the SunJCE provider is normally the default provider. If you are using an IBM JDK then the IBM provider is normally the default. You only need to create an instance of a Provider if you need it to handle either a cryptographic algorithm that is not available in the default provider or if you are dealing with a Provider for an HSM (or other hardware based encryption). In these cases you will install the provider provided by the hardware or library you are trying to access.
P.S. Have you installed the 'unlimited strength' jars?

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Does anyone know of any Sun Classes for Java Cryptographic Extension -JCE ?

Hello - anyone know of any Sun Classes for Java Cryptographic Extension? If so do you have the Sun class code/s?
Edited by: Mister_Schoenfelder on Apr 17, 2009 11:31 AM

Maybe this can be helpful?
com.someone.DESEncrypter
======================
package com.someone;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
public class DESEncrypter {
    Cipher ecipher;
    Cipher dcipher;
    // 8-byte Salt
    byte[] salt = {
        (byte)0xA9, (byte)0x9B, (byte)0xC8, (byte)0x32,
        (byte)0x56, (byte)0x35, (byte)0xE3, (byte)0x03
    // Iteration count
    int iterationCount = 19;
    public DESEncrypter(String passPhrase) {
        try {
            // Create the key
            KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
            SecretKey key = SecretKeyFactory.getInstance(
                "PBEWithMD5AndDES").generateSecret(keySpec);
            ecipher = Cipher.getInstance(key.getAlgorithm());
            dcipher = Cipher.getInstance(key.getAlgorithm());
            // Prepare the parameter to the ciphers
            AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
            // Create the ciphers
            ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
            dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
        } catch (java.security.InvalidAlgorithmParameterException e) {
             e.printStackTrace();
        } catch (java.security.spec.InvalidKeySpecException e) {
             e.printStackTrace();
        } catch (javax.crypto.NoSuchPaddingException e) {
             e.printStackTrace();
        } catch (java.security.NoSuchAlgorithmException e) {
             e.printStackTrace();
        } catch (java.security.InvalidKeyException e) {
             e.printStackTrace();
    public DESEncrypter(SecretKey key) {
        try {
            ecipher = Cipher.getInstance("DES");
            dcipher = Cipher.getInstance("DES");
            ecipher.init(Cipher.ENCRYPT_MODE, key);
            dcipher.init(Cipher.DECRYPT_MODE, key);
        } catch (javax.crypto.NoSuchPaddingException e) {
             e.printStackTrace();
        } catch (java.security.NoSuchAlgorithmException e) {
             e.printStackTrace();
        } catch (java.security.InvalidKeyException e) {
             e.printStackTrace();
    public String encrypt(byte[] data) {
         return encrypt(new sun.misc.BASE64Encoder().encode(data), false);
    public byte[] decryptData(String s) throws IOException {
         String str = decrypt(s, false);
         return new sun.misc.BASE64Decoder().decodeBuffer(str);
    public String encrypt(String str, boolean useUTF8) {
        try {
            // Encode the string into bytes using utf-8
            byte[] utf8 = useUTF8 ? str.getBytes("UTF8") : str.getBytes();
            // Encrypt
            byte[] enc = ecipher.doFinal(utf8);
            // Encode bytes to base64 to get a string
            return new sun.misc.BASE64Encoder().encode(enc);
        } catch (javax.crypto.BadPaddingException e) {
             e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
             e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
        } catch (java.io.IOException e) {
             e.printStackTrace();
        return null;
    public String decrypt(String str, boolean useUTF8) {
        try {
            // Decode base64 to get bytes
            byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
            // Decrypt
            byte[] utf8 = dcipher.doFinal(dec);
            // Decode using utf-8
            return useUTF8 ? new String(utf8, "UTF8") : new String(utf8);
        } catch (javax.crypto.BadPaddingException e) {
             e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
             e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
        } catch (java.io.IOException e) {
             e.printStackTrace();
        return null;
     // Here is an example that uses the class
     public static void main(String[] args) {
         try {
             // Generate a temporary key. In practice, you would save this key.
             // See also e464 Encrypting with DES Using a Pass Phrase.
             SecretKey key = KeyGenerator.getInstance("DES").generateKey();
             // Create encrypter/decrypter class
             DESEncrypter encrypter = new DESEncrypter(key);
             // Encrypt
             String encrypted = encrypter.encrypt("Don't tell anybody!", true);
             // Decrypt
             String decrypted = encrypter.decrypt(encrypted, true);
         } catch (Exception e) {
              e.printStackTrace();
          try {
              // Create encrypter/decrypter class
              DESEncrypter encrypter = new DESEncrypter("My Pass Phrase!");
              // Encrypt
              String encrypted = encrypter.encrypt("Don't tell anybody!", true);
              // Decrypt
              String decrypted = encrypter.decrypt(encrypted, true);
          } catch (Exception e) {
               e.printStackTrace();
}

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Hi Experts
I am trying to install SAP Net Weaver 04 support release 1 > oracle JAVA System. I am performing installation on Windows 2003 server.
While installing the JAVA Cryptographic Toolkit > sap java library archive I have getting problem please give any idea about this.
Where I get this path how to download the SAP JAVA library archive file.
Error finds out shown bellow
Regards,
Rahul

hi Rahul
You'll find the file on the following link:
Web page: http://java.sun.com/javase/downloads/index.jsp
(see section "Other downloads", "Java Cryptography Extension (JCE)
Unlimited Strength Jurisdiction Policy Files 5.0").
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(hi moderator, sorry for double posting, just notice that i have 2 IDs)
Edited by: Ariyanto Hong on Apr 2, 2008 3:23 PM

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Hi Experts
I am trying to install SAP Net Weaver 04 support release 1 > oracle JAVA System. I am performing installation on Windows 2003 server.
While installing the JAVA Cryptographic Toolkit > sap java library archive I have getting problem please give any idea about this.
Where I get this path how to download the SAP JAVA library archive file.
Error finds out shown bellow
Regards,
Rahul

Rahul wrote:>
> Hi Experts
>
> I am trying to install SAP Net Weaver 04 support release 1 > oracle JAVA System. I am performing installation on Windows 2003 server.
> While installing the JAVA Cryptographic Toolkit > sap java library archive I have getting problem please give any idea about this.
if you would give us the error message we could give you an advise.
> Where I get this path how to download the SAP JAVA library archive file.
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Greetingz
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