Name: iiR10263 Date: 01/04/2004



Current implementaion fails to reinitialize javax.crypto.Cipher object
instance after an attempt of initialization with null Certificate

Please find code example and out put below

import java.io.*;
import java.util.*;
import java.security.cert.*;
import javax.crypto.Cipher;
import java.security.InvalidKeyException;

class e11 {
    public static void main(String argv[]) {
        String algorithm = "RSA";

        try {
            String certStr = "-----BEGIN CERTIFICATE-----\n" +
"MIICYDCCAckCBDm+nq8wDQYJKoZIhvcNAQEEBQAwdzELMAkGA1UEBhMCVVMxCzAJ\n" +
"BgNVBAgTAkNBMRIwEAYDVQQHEwlTdW5ueXZhbGUxHzAdBgNVBAoTFlN1biBNaWNy\n" +
"b3N5c3RlbXMsIEluYy4xETAPBgNVBAsTCEphdmFzb2Z0MRMwEQYDVQQDEwpSb2dl\n" +
"ciBQaGFtMB4XDTAwMDkxMjIxMjI1NVoXDTIwMDkwNzIxMjI1NVowdzELMAkGA1UE\n" +
"BhMCVVMxCzAJBgNVBAgTAkNBMRIwEAYDVQQHEwlTdW5ueXZhbGUxHzAdBgNVBAoT\n" +
"FlN1biBNaWNyb3N5c3RlbXMsIEluYy4xETAPBgNVBAsTCEphdmFzb2Z0MRMwEQYD\n" +
"VQQDEwpSb2dlciBQaGFtMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCuUdLg\n" +
"t0BUE/MZ/wkcjDDK5VRAhuOphPizHV90S1goG7u0Ayf6w9V9WdJXswmbyf0SbRRj\n" +
"2IaH3ClRM/S+RuOZPzJyYY2GnIxUaIlOkWdBIcZv1l/ceXyal+C2oAF/ypRbstfE\n" +
"Lq5Y/AyQNEesi42Php+wTLT7GOBj1AMMBNLdYwIDAQABMA0GCSqGSIb3DQEBBAUA\n" +
"A4GBAEL9yV2GdVEeK7VdN3LKFxZ1egsZqtpzoUb37zqOXii27kdmIFGPPBal2/Ij\n" +
"us/Dphu+BMwxFerEUV7r/KfjDPk0Wofwdj7Ls2fcK4LzRvEI+OswvBaAAqJ3D+ja\n" +
"VcYBnS35IJDv0ocMUsPhr4kKUn0MQik3eixmh/Vz2Cu1bq1f\n" +
"-----END CERTIFICATE-----";
            byte[] bb = certStr.getBytes();
            
            if (bb != null) {
                ByteArrayInputStream bas = new ByteArrayInputStream(bb);
                BufferedInputStream bis = new BufferedInputStream(bas);
                CertificateFactory cf = CertificateFactory.getInstance("X.509");
                
                if (bis.available() > 0) {
                    Cipher c;
                    X509Certificate cert =
                        (X509Certificate)cf.generateCertificate(bis);
                        
                    System.out.println(cert.toString());
                   
                    c = Cipher.getInstance(algorithm);
                    
                    System.out.println("Obtained Cipher for algorithm " + c.getAlgorithm());

                    try {
                        c.init(Cipher.ENCRYPT_MODE, (Certificate) null);
                    } catch (InvalidKeyException e) {
                        System.out.println("IKE for null certificate");
                    } catch (NullPointerException e) {
                        System.out.println("NPE for null certificate");
                    }
                    
                    c.init(Cipher.ENCRYPT_MODE, cert);
                    System.out.println("Cipher is initialized");
                }
            }
        } catch (Exception e) {
            e.printStackTrace(System.out);
        }
    }
}


<ibr@void(pts/13).268> ~/links/java/jdk1.5.0/solaris/bin/java e11
[
[
  Version: V1
  Subject: CN=Roger Pham, OU=Javasoft, O="Sun Microsystems, Inc.", L=Sunnyvale, ST=CA, C=US
  Signature Algorithm: MD5withRSA, OID = 1.2.840.113549.1.1.4

  Key: Sun RSA public key, 1024 bits
  modulus: 122411402858696027936294583683561371998730842810020052647245850742614006653199301284673185989714751795439771531332191471814703433490765874453202934900168751252134585967410940304591432510984651278537717849083922048964292170356479520381696599615917773314172374863139694341791273866042577279292898110642737831267
  public exponent: 65537
  Validity: [From: Wed Sep 13 01:22:55 MSD 2000,
               To: Tue Sep 08 01:22:55 MSD 2020]
  Issuer: CN=Roger Pham, OU=Javasoft, O="Sun Microsystems, Inc.", L=Sunnyvale, ST=CA, C=US
  SerialNumber: [ 39be9eaf]

]
  Algorithm: [MD5withRSA]
  Signature:
0000: 42 FD C9 5D 86 75 51 1E 2B B5 5D 37 72 CA 17 16 B..].uQ.+.]7r...
0010: 75 7A 0B 19 AA DA 73 A1 46 F7 EF 3A 8E 5E 28 B6 uz....s.F..:.^(.
0020: EE 47 66 20 51 8F 3C 16 A5 DB F2 23 BA CF C3 A6 .Gf Q.<....#....
0030: 1B BE 04 CC 31 15 EA C4 51 5E EB FC A7 E3 0C F9 ....1...Q^......
0040: 34 5A 87 F0 76 3E CB B3 67 DC 2B 82 F3 46 F1 08 4Z..v>..g.+..F..
0050: F8 EB 30 BC 16 80 02 A2 77 0F E8 DA 55 C6 01 9D ..0.....w...U...
0060: 2D F9 20 90 EF D2 87 0C 52 C3 E1 AF 89 0A 52 7D -. .....R.....R.
0070: 0C 42 29 37 7A 2C 66 87 F5 73 D8 2B B5 6E AD 5F .B)7z,f..s.+.n._

]
Obtained Cipher for algorithm RSA
IKE for null certificate
java.security.InvalidKeyException: No installed provider supports this key: sun.security.rsa.RSAPublicKeyImpl
        at javax.crypto.Cipher.a(DashoA6275)
        at javax.crypto.Cipher.init(DashoA6275)
        at javax.crypto.Cipher.init(DashoA6275)
        at e11.main(e11.java:53)


java full version "1.5.0-beta-b32"

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