| /* |
| * Copyright (c) 2018, 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. |
| */ |
| package jdk.test.lib.security; |
| |
| import jdk.test.lib.Asserts; |
| import sun.security.util.DerInputStream; |
| import sun.security.util.DerValue; |
| import sun.security.util.KnownOIDs; |
| import sun.security.util.ObjectIdentifier; |
| |
| import java.io.IOException; |
| |
| public class DerUtils { |
| /** |
| * Returns a DerValue (deep) inside another DerValue. |
| * <p> |
| * The location of the inner DerValue is expressed as a string, in which |
| * each character is a step from the outer DerValue into the inner one. |
| * If it's a number n, the n'th element (starting from 0) of a sequence |
| * is the next step. If it's 'c', the content of an OctetString parsed |
| * as a DerValue is the next step. Note that n cannot be bigger than 9. |
| * <p> |
| * Attention: do not reuse the return value. DerValue is mutable and |
| * reading it advances a pointer inside. |
| * <p> |
| * For example, here is a PKCS #12 file: |
| * <pre> |
| * 0000:0845 [] SEQUENCE |
| * 0004:0003 [0] INTEGER 3 |
| * 0007:07FE [1] SEQUENCE |
| * 000B:000B [10] OID 1.2.840.113549.1.7.1 (data) |
| * 0016:07EF [11] cont [0] |
| * 001A:07EB [110] OCTET STRING |
| * ... |
| * </pre> |
| * and the content of OCTET string at offset 001A can be parsed as another |
| * DerValue which is: |
| * <pre> |
| * 0000:07E7 [] SEQUENCE |
| * 0004:0303 [0] SEQUENCE |
| * 0008:000B [00] OID 1.2.840.113549.1.7.1 (data) |
| * .... |
| * </pre> |
| * Then the OID is {@code innerDerValue(data, "110c00").getOID()}. |
| * |
| * @param data the outer DerValue. We choose byte[] instead of DerValue |
| * because DerValue is mutable and cannot be reused. |
| * @param location the location of the inner DerValue |
| * @return the inner DerValue, or null if no DerValue is at the location |
| * @throws IOException if an I/O error happens |
| */ |
| public static DerValue innerDerValue(byte[] data, String location) |
| throws IOException { |
| |
| DerValue v = new DerValue(data); |
| for (char step : location.toCharArray()) { |
| if (step == 'c') { |
| v = new DerValue(v.getOctetString()); |
| } else { |
| DerInputStream ins = v.getData(); |
| // skip n DerValue in the sequence |
| for (int i = 0; i < step - '0'; i++) { |
| ins.getDerValue(); |
| } |
| if (ins.available() > 0) { |
| v = ins.getDerValue(); |
| } else { |
| return null; |
| } |
| } |
| } |
| return v; |
| } |
| |
| /** |
| * Ensures that the inner DerValue is the expected ObjectIdentifier. |
| */ |
| public static void checkAlg(byte[] der, String location, |
| ObjectIdentifier expected) throws Exception { |
| Asserts.assertEQ(innerDerValue(der, location).getOID(), expected); |
| } |
| |
| /** |
| * Ensures that the inner DerValue is the expected ObjectIdentifier. |
| */ |
| public static void checkAlg(byte[] der, String location, |
| KnownOIDs expected) throws Exception { |
| Asserts.assertEQ(innerDerValue(der, location).getOID(), |
| ObjectIdentifier.of(expected)); |
| } |
| |
| /** |
| * Ensures that the inner DerValue is the expected integer. |
| */ |
| public static void checkInt(byte[] der, String location, int expected) |
| throws Exception { |
| Asserts.assertEQ(innerDerValue(der, location).getInteger(), expected); |
| } |
| |
| /** |
| * Ensures that there is no inner DerValue at the specified location. |
| */ |
| public static void shouldNotExist(byte[] der, String location) |
| throws Exception { |
| Asserts.assertTrue(innerDerValue(der, location) == null); |
| } |
| } |