[Cryptix-users] "Not an RSA private key"?

[<fma...@bo...>]

Dear friends,

I'm having a problem with this program:

/* START...*/
import java.io.*;
import java.lang.*;
import cryptix.util.core.BI;
import cryptix.util.core.Hex;
import cryptix.util.test.BaseTest;

import java.math.BigInteger;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.Signature;
import xjava.security.Cipher;
import xjava.security.interfaces.CryptixRSAPublicKey;
import xjava.security.interfaces.CryptixRSAPrivateKey;
import xjava.security.interfaces.RSAFactors;

// BaseTest
import java.io.PrintWriter;
import java.io.StringWriter;
import java.applet.Applet;


public class RSAchico3
{

    // Constantes
    private static final byte[] message =3D (
        "Je ne veux que du magnifique, et je ne travaille pas pour le " +
        "vulgaire des lecteurs --Giambattista BODONI
(1740-1813)").getBytes();
    private static final SecureRandom prng =3D new SecureRandom();

    // Metodos
    public static void main (String[] args) throws Exception {
        java.security.Security.addProvider(new cryptix.provider.Cryptix()=
);
        new RSAchico3().engine();
    }

    protected void engine() throws Exception {
        int k =3D 2;


        KeyPairGenerator kpg =3D KeyPairGenerator.getInstance("RSA");
        Signature[] sigs =3D new Signature[] {
            Signature.getInstance("MD2/RSA/PKCS#1"),
            Signature.getInstance("MD5/RSA/PKCS#1"),
            Signature.getInstance("SHA-1/RSA/PKCS#1"),
            Signature.getInstance("RIPEMD160/RSA/PKCS#1"),
        };
        Cipher cipher =3D Cipher.getInstance("RSA");
        int s;  // key strength

        for (int i =3D 1; i < k; i++) {
          //  s =3D 384 + 128 * i;
            s =3D 512;
            System.out.println("\nTest #" + (i) + " (" + s + "-bit
modulus)\n");

            System.out.print("  Generating keypair ");
            kpg.initialize(s, prng);
            System.out.print(". ");
            KeyPair pair =3D kpg.generateKeyPair();
            System.out.print(". ");
            PrivateKey sk =3D pair.getPrivate();
            System.out.print(". ");
            PublicKey pk =3D pair.getPublic();
            System.out.println(". Done!\n");

            System.out.print("  Testing Signatures \n");
            for (int j =3D 0; j < sigs.length; j++)
            {
                testSignature(s, pk, sk, sigs[j]);
                // out.print(". ");
            }
            // out.println("Done!\n");

            //testEncryption(s, pk, sk, cipher);


        }
    }


    private void testSignature(int s, PublicKey pk, PrivateKey sk, Signat=
ure
alg) {
        try {
            System.out.println("  Signing with a " + s + "-bit key using =
" +
alg.getAlgorithm()
                + "...");
            alg.initSign(sk);
            System.out.println("B\n");
            alg.update(message);
            byte[] signature =3D alg.sign();

            System.out.println("  Verifying with same " + s + "-bit key
using " + alg.getAlgorithm()
                + "...");
            alg.initVerify(pk);
            alg.update(message);
            boolean ok =3D alg.verify(signature);
 	    if (ok)
              System.out.println("Verificacao ok!\n");

        } catch (Throwable e) {
            System.out.println(e);
        }
    }
}
/* END...*/


The result is:

--------------------
Test #1 (512-bit modulus)
  Generating keypair . . . . Done!
  Testing Signatures
  Signing with a 512-bit key using MD2/RSA/PKCS#1...
java.security.InvalidKeyException: MD2/RSA/PKCS#1: Not an RSA private key
  Signing with a 512-bit key using MD5/RSA/PKCS#1...
java.security.InvalidKeyException: MD5/RSA/PKCS#1: Not an RSA private key
  Signing with a 512-bit key using SHA-1/RSA/PKCS#1...
java.security.InvalidKeyException: SHA-1/RSA/PKCS#1: Not an RSA private k=
ey
  Signing with a 512-bit key using RIPEMD160/RSA/PKCS#1...
java.security.InvalidKeyException: RIPEMD160/RSA/PKCS#1: Not an RSA priva=
te
key


What does this mean? Where is the error?
Thanks!

  Francisco Magalh=E3es
  226-7500/226-7474/9981-3252
  ICQ 145605801
  S=E3o Lu=EDs - Patrim=F4nio da Humanidade