Lazily load Sun digest provider for jar verification

public class ManifestEntryVerifier {
 
     private static final Debug debug = Debug.getInstance("jar");
 
- private static final Provider sunProvider = new sun.security.provider.Sun();
-
     /** the created digest objects */
     HashMap createdDigests;
 
     /** the digests in use for a given entry*/
     ArrayList digests;

@@ -107,11 +105,11 @@
                 MessageDigest digest =
                     (MessageDigest) createdDigests.get(algorithm);
 
                 if (digest == null) {
                     try {
-
+ Provider sunProvider = new sun.security.provider.Sun();
                         digest = MessageDigest.getInstance
                                         (algorithm, sunProvider);
                         createdDigests.put(algorithm, digest);
                     } catch (NoSuchAlgorithmException nsae) {
                         // ignore