src/java.base/share/classes/sun/security/x509/X509CertImpl.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1996, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -1922,21 +1922,22 @@
     private ConcurrentHashMap<String,String> fingerprints =
             new ConcurrentHashMap<>(2);
 
     public String getFingerprint(String algorithm) {
         return fingerprints.computeIfAbsent(algorithm,
-                x -> getCertificateFingerPrint(x));
+            x -> getFingerprint(x, this));
     }
 
     /**
      * Gets the requested finger print of the certificate. The result
      * only contains 0-9 and A-F. No small case, no colon.
      */
-    private String getCertificateFingerPrint(String mdAlg) {
+    public static String getFingerprint(String algorithm,
+            X509Certificate cert) {
         try {
-            byte[] encCertInfo = getEncoded();
-            MessageDigest md = MessageDigest.getInstance(mdAlg);
+            byte[] encCertInfo = cert.getEncoded();
+            MessageDigest md = MessageDigest.getInstance(algorithm);
             byte[] digest = md.digest(encCertInfo);
             StringBuilder sb = new StringBuilder(digest.length * 2);
             for (int i = 0; i < digest.length; i++) {
                 byte2hex(digest[i], sb);
             }