--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/sun/security/util/DerInputBuffer/PaddedBitString.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2002 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.
+ */
+
+/*
+ * @test
+ * @bug 4511556
+ * @summary Verify BitString value containing padding bits is accepted.
+ */
+
+import java.io.*;
+import java.util.Arrays;
+import java.math.BigInteger;
+
+import sun.security.util.DerInputStream;
+
+public class PaddedBitString {
+
+    // Relaxed the BitString parsing routine to accept bit strings
+    // with padding bits, ex. treat DER_BITSTRING_PAD6 as the same
+    // bit string as DER_BITSTRING_NOPAD.
+    // Note:
+    // 1. the number of padding bits has to be in [0...7]
+    // 2. value of the padding bits is ignored
+
+    // bit string (01011101 11000000)
+    // With 6 padding bits (01011101 11001011)
+    private final static byte[] DER_BITSTRING_PAD6 = { 3, 3, 6,
+                                                   (byte)0x5d, (byte)0xcb };
+
+    // With no padding bits
+    private final static byte[] DER_BITSTRING_NOPAD = { 3, 3, 0,
+                                                   (byte)0x5d, (byte)0xc0 };
+
+    public static void main(String args[]) throws Exception {
+        byte[] ba0, ba1;
+        try {
+            DerInputStream derin = new DerInputStream(DER_BITSTRING_PAD6);
+            ba1 = derin.getBitString();
+        } catch( IOException e ) {
+            e.printStackTrace();
+            throw new Exception("Unable to parse BitString with 6 padding bits");
+        }
+
+        try {
+            DerInputStream derin = new DerInputStream(DER_BITSTRING_NOPAD);
+            ba0 = derin.getBitString();
+        } catch( IOException e ) {
+            e.printStackTrace();
+            throw new Exception("Unable to parse BitString with no padding");
+        }
+
+        if (Arrays.equals(ba1, ba0) == false ) {
+            throw new Exception("BitString comparison check failed");
+        }
+    }
+}