title: Sun Java KeyManagerFactory and null passwords
body: <p>We are having a problem with the KeyManagerFactory in the Sun JRE 1.6.  We are using code similar to the following to upload and use a certificate in p12 format:</p>
  
  <pre><code>KeyStore keyStore = KeyStore.getInstance(PKCS12);
  KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(SUN_X509);
  
  InputStream certificateFile = getSSLCertificate();
  String certificatePassword = getSSLCertificatePassword();
  keyStore.load(certificateFile, certificatePassword);
  keyManagerFactory.init(keyStore, certificatePassword);
  </code></pre>
  
  <p>This code works correctly when the certificate password exists.  But when the certificate password is null (so the certificate is not protected by a password) we get a divide by zero error from the keyManagerFactory.init line.</p>
  
  <p>Does anyone know why this is happening?  Is it not possible to use a certificate without a password?
  Thanks</p>