--- a/jdk/src/share/classes/sun/security/x509/AVA.java	Tue Mar 11 23:37:02 2008 -0700
+++ b/jdk/src/share/classes/sun/security/x509/AVA.java	Fri Mar 14 10:33:21 2008 -0400
@@ -780,7 +780,8 @@
              * Implementations MAY escape other characters.
              *
              * NOTE: this implementation also recognizes "=" and "#" as
-             * characters which need escaping.
+             * characters which need escaping, and null which is escaped as
+             * '\00' (see RFC 4514).
              *
              * If a character to be escaped is one of the list shown above, then
              * it is prefixed by a backslash ('\' ASCII 92).
@@ -805,6 +806,10 @@
                     // append printable/escaped char
                     sbuffer.append(c);
 
+                } else if (c == '\u0000') {
+                    // escape null character
+                    sbuffer.append("\\00");
+
                 } else if (debug != null && Debug.isOn("ava")) {
 
                     // embed non-printable/non-escaped char

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/javax/security/auth/x500/X500Principal/RFC4514.java	Fri Mar 14 10:33:21 2008 -0400
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  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.
+ *
+ * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+import javax.security.auth.x500.X500Principal;
+
+/**
+ * @test
+ * @bug 6611991
+ * @summary Add support for parsing RFC 4514 DNs to X500Principal
+ *
+ * Ensure RFC 4514 Distinguished Name Strings can be parsed by X500Principal.
+ * RFC 4514 obsoleted RFC 2253 so we should make sure we can parse DNs of
+ * that form that contain subtle differences or clarifications in the grammar.
+ */
+public class RFC4514 {
+
+    private int failed = 0;
+
+    public static void main(String[] args) throws Exception {
+        new RFC4514().test();
+    }
+
+    private void test() throws Exception {
+
+        /**
+         * RFC 4514 allows space to be escaped as '\ '.
+         */
+        parse("CN=\\ Space\\ ,C=US");
+        parse("CN=Sp\\ ace,C=US");
+        /**
+         * RFC 4514 does not require escaping of '=' characters.
+         */
+        parse("CN=Eq=uals,C=US");
+        /**
+         * RFC 4514 requires the null character to be escaped.
+         */
+        parse("CN=\\00,C=US");
+        /**
+         * RFC 4514 does not require escaping of non-leading '#' characters.
+         */
+        parse("CN=Num#ber,C=US");
+        /**
+         * XMLDSig (http://www.w3.org/TR/2002/REC-xmldsig-core-20020212/)
+         * allows implementations to escape trailing whitespace as '\20'.
+         */
+        parse("CN=Trailing \\20,C=US");
+        /**
+         * XMLDSig allows implementations to escape ASCII control characters
+         * (Unicode range \x00 - \x1f) by replacing them with "\" followed by
+         * a two digit hex number showing its Unicode number.
+         */
+        parse("CN=Con\\09trol,C=US");
+
+        if (failed != 0) {
+            throw new Exception("Some RFC4514 tests FAILED");
+        }
+    }
+
+    public void parse(String dnString) throws Exception {
+
+        System.out.println("Parsing " + dnString);
+        X500Principal dn = new X500Principal(dnString);
+        String dnString2 = dn.getName();
+        X500Principal dn2 = new X500Principal(dnString2);
+        if (dn.equals(dn2)) {
+            System.out.println("PASSED");
+        } else {
+            System.out.println("FAILED");
+            failed++;
+        }
+    }
+}