--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/jdk/src/classes/build/tools/generatecacerts/GenerateCacerts.java	Wed Jun 05 09:58:05 2019 +0800
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2019, 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 build.tools.generatecacerts;
+
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.KeyStore;
+import java.security.cert.CertificateFactory;
+
+/**
+ * Generate cacerts
+ *    args[0]: Full path string to the directory that contains CA certs
+ *    args[1]: Full path string to the generated cacerts
+ */
+public class GenerateCacerts {
+    public static void main(String[] args) throws Exception {
+        KeyStore ks = KeyStore.getInstance("JKS");
+        ks.load(null, null);
+        CertificateFactory cf = CertificateFactory.getInstance("X509");
+        Files.list(Path.of(args[0]))
+                .filter(p -> !p.getFileName().toString().equals("README"))
+                .forEach(p -> {
+                    try {
+                        String alias = p.getFileName().toString() + " [jdk]";
+                        try (InputStream fis = Files.newInputStream(p)) {
+                            ks.setCertificateEntry(alias, cf.generateCertificate(fis));
+                        }
+                    } catch (Exception e) {
+                        throw new RuntimeException(e);
+                    }
+                });
+        try (FileOutputStream fos = new FileOutputStream(args[1])) {
+            ks.store(fos, "changeit".toCharArray());
+        }
+    }
+}