Question

I want to create PEM-encoded certification request but following code

shows error:

PKCS10CRexample.java:33: cannot find symbol

symbol : variable Utils

location: class PKCS10CRexample

    kpGen.initialize(1024, Utils.createFixedRandom());
                           ^

1 error

but the code is example from’Beginning Cryptography with Java’, thus it should not

include any syntax errors.

what is the problem?, what class should I include?

import java.io.OutputStreamWriter;
import java.security.KeyPair;
import java.security.KeyPairGenerator;

import javax.security.auth.x500.X500Principal;

import org.bouncycastle.jce.PKCS10CertificationRequest;
import org.bouncycastle.openssl.PEMWriter;

public class PKCS10CRexample
{
    public static PKCS10CertificationRequest generateRequest(
            KeyPair pair)
            throws Exception

            {           
             return new PKCS10CertificationRequest(
                     "SHA256withRSA",
                     new X500Principal("CN=Requested Test Certificate"),
                     pair.getPublic(),
                     null,
                     pair.getPrivate());
            }

    public static void main(String[] args) throws Exception
    {
        //create the keys
        KeyPairGenerator kpGen = KeyPairGenerator.getInstance("RSA", "BC");

        kpGen.initialize(1024, Utils.createFixedRandom());

        KeyPair pair=kpGen.generateKeyPair();

        PKCS10CertificationRequest request = generateRequest(pair);

        PEMWriter pemWrt = new PEMWriter(
                          new OutputStreamWriter(System.out));

        pemWrt.writeObject(request);

        pemWrt.close();


    }



}    

Answer 1

The Utils class which implements createFixedRandom()seems to be the one from Chapter 4 of the book.

Have a look at chapter 4 of the book and of the examples of this chapter.