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/*
* Copyright (c) 2002, 2021, 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.
*
* 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.
*/
/*
* @test
* @bug 4511556
* @summary Verify BitString value containing padding bits is accepted.
* @modules java.base/sun.security.util
* @library /test/lib
*/
import java.io.*;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.HexFormat;
import jdk.test.lib.Asserts;
import jdk.test.lib.Utils;
import sun.security.util.BitArray;
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_b as the same
// bit string as DER_BITSTRING_PAD6_0/DER_BITSTRING_NOPAD.
// Note:
// 1. the number of padding bits has to be in [0...7]
// 2. value of the padding bits is ignored
// With no padding bits
private final static byte[] DER_BITSTRING_NOPAD = { 3, 3, 0,
(byte)0x5d, (byte)0xc0 };
// With 6 zero padding bits (01011101 11000000)
private final static byte[] DER_BITSTRING_PAD6_0 = { 3, 3, 6,
(byte)0x5d, (byte)0xc0 };
// With 6 nonzero padding bits (01011101 11001011)
private final static byte[] DER_BITSTRING_PAD6_b = { 3, 3, 6,
(byte)0x5d, (byte)0xcb };
// With 8 padding bits
private final static byte[] DER_BITSTRING_PAD8_0 = { 3, 3, 8,
(byte)0x5d, (byte)0xc0 };
private final static byte[] BITS = { (byte)0x5d, (byte)0xc0 };
static enum Type {
BIT_STRING,
UNALIGNED_BIT_STRING;
}
public static void main(String args[]) throws Exception {
test(DER_BITSTRING_NOPAD, new BitArray(16, BITS));
test(DER_BITSTRING_PAD6_0, new BitArray(10, BITS));
test(DER_BITSTRING_PAD6_b, new BitArray(10, BITS));
test(DER_BITSTRING_PAD8_0, null);
System.out.println("Tests Passed");
}
private static void test(byte[] in, BitArray ans) throws IOException {
System.out.println("Testing " +
HexFormat.of().withUpperCase().formatHex(in));
for (Type t : Type.values()) {
DerInputStream derin = new DerInputStream(in);
boolean shouldPass = (ans != null);
switch (t) {
case BIT_STRING:
if (shouldPass) {
Asserts.assertTrue(Arrays.equals(ans.toByteArray(),
derin.getBitString()));
} else {
Utils.runAndCheckException(() -> derin.getBitString(),
IOException.class);
}
break;
case UNALIGNED_BIT_STRING:
if (shouldPass) {
Asserts.assertEQ(ans, derin.getUnalignedBitString());
} else {
Utils.runAndCheckException(() ->
derin.getUnalignedBitString(), IOException.class);
}
break;
}
}
}
}
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