diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/jdk.security.auth/share/classes/com/sun/security/auth/NTSidGroupPrincipal.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.security.auth/share/classes/com/sun/security/auth/NTSidGroupPrincipal.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 1999, 2013, 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 com.sun.security.auth;
+
+/**
+ * This class extends {@code NTSid}
+ * and represents one of the groups to which a Windows NT user belongs.
+ *
+ * <p> Principals such as this {@code NTSidGroupPrincipal}
+ * may be associated with a particular {@code Subject}
+ * to augment that {@code Subject} with an additional
+ * identity.  Refer to the {@code Subject} class for more information
+ * on how to achieve this.  Authorization decisions can then be based upon
+ * the Principals associated with a {@code Subject}.
+ *
+ * @see java.security.Principal
+ * @see javax.security.auth.Subject
+ * @see com.sun.security.auth.NTSid
+ */
+public class NTSidGroupPrincipal extends NTSid {
+
+    private static final long serialVersionUID = -1373347438636198229L;
+
+    /**
+     * Create an {@code NTSidGroupPrincipal} with a Windows NT group name.
+     *
+     * @param name the Windows NT group SID for this user.
+     *
+     * @exception NullPointerException if the {@code name}
+     *                  is {@code null}.
+     */
+    public NTSidGroupPrincipal(String name) {
+        super(name);
+    }
+
+    /**
+     * Return a string representation of this {@code NTSidGroupPrincipal}.
+     *
+     * @return a string representation of this {@code NTSidGroupPrincipal}.
+     */
+    public String toString() {
+        java.text.MessageFormat form = new java.text.MessageFormat
+                (sun.security.util.ResourcesMgr.getAuthResourceString
+                        ("NTSidGroupPrincipal.name"));
+        Object[] source = {getName()};
+        return form.format(source);
+    }
+
+    /**
+     * Compares the specified Object with this {@code NTSidGroupPrincipal}
+     * for equality.  Returns true if the given object is also a
+     * {@code NTSidGroupPrincipal} and the two NTSidGroupPrincipals
+     * have the same SID.
+     *
+     * @param o Object to be compared for equality with this
+     *          {@code NTSidGroupPrincipal}.
+     *
+     * @return true if the specified Object is equal to this
+     *          {@code NTSidGroupPrincipal}.
+     */
+    public boolean equals(Object o) {
+            if (o == null)
+                return false;
+
+        if (this == o)
+            return true;
+
+        if (!(o instanceof NTSidGroupPrincipal))
+            return false;
+
+        return super.equals(o);
+    }
+
+}