--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/sun/security/provider/VerificationProvider.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,88 @@
+/*
+ * 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
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.security.provider;
+
+import java.util.*;
+import java.security.*;
+
+import sun.security.action.PutAllAction;
+
+import sun.security.rsa.SunRsaSignEntries;
+import static sun.security.util.SecurityConstants.PROVIDER_VER;
+
+
+/**
+ * Provider used for verification of signed JAR files *if* the Sun and
+ * SunRsaSign main classes have been removed. Otherwise, this provider is not
+ * necessary and registers no algorithms. This functionality only exists to
+ * support a use case required by a specific customer and is not generally
+ * supported.
+ *
+ * @since  1.7
+ * @author Andreas Sterbenz
+ */
+public final class VerificationProvider extends Provider {
+
+    private static final long serialVersionUID = 7482667077568930381L;
+
+    private static final boolean ACTIVE;
+
+    static {
+        boolean b;
+        try {
+            Class.forName("sun.security.provider.Sun");
+            Class.forName("sun.security.rsa.SunRsaSign");
+            b = false;
+        } catch (ClassNotFoundException e) {
+            b = true;
+        }
+        ACTIVE = b;
+    }
+
+    public VerificationProvider() {
+        super("SunJarVerification", PROVIDER_VER, "Jar Verification Provider");
+        // register all algorithms normally registered by the Sun and SunRsaSign
+        // providers, but only if they are missing
+        if (ACTIVE == false) {
+            return;
+        }
+
+        // if there is no security manager installed, put directly into
+        // the provider. Otherwise, create a temporary map and use a
+        // doPrivileged() call at the end to transfer the contents
+        if (System.getSecurityManager() == null) {
+            SunEntries.putEntries(this);
+            SunRsaSignEntries.putEntries(this);
+        } else {
+            // use LinkedHashMap to preserve the order of the PRNGs
+            Map<Object, Object> map = new LinkedHashMap<>();
+            SunEntries.putEntries(map);
+            SunRsaSignEntries.putEntries(map);
+            AccessController.doPrivileged(new PutAllAction(this, map));
+        }
+    }
+
+}