1/*
2 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 6864911
27 * @summary ASN.1/DER input stream parser needs more work
28 * @modules java.base/sun.security.util
29 */
30
31import java.io.*;
32import sun.security.util.*;
33
34public class BadValue {
35
36    public static void main(String[] args) throws Exception {
37
38        // Test IOUtils.readFully
39
40        // We have 4 bytes
41        InputStream in = new ByteArrayInputStream(new byte[10]);
42        byte[] bs = IOUtils.readFully(in, 4, true);
43        if (bs.length != 4 || in.available() != 6) {
44            throw new Exception("First read error");
45        }
46        // But only 6 left
47        bs = IOUtils.readFully(in, 10, false);
48        if (bs.length != 6 || in.available() != 0) {
49            throw new Exception("Second read error");
50        }
51        // MAX read as much as it can
52        in = new ByteArrayInputStream(new byte[10]);
53        bs = IOUtils.readFully(in, Integer.MAX_VALUE, true);
54        if (bs.length != 10 || in.available() != 0) {
55            throw new Exception("Second read error");
56        }
57        // MAX ignore readAll
58        in = new ByteArrayInputStream(new byte[10]);
59        bs = IOUtils.readFully(in, Integer.MAX_VALUE, false);
60        if (bs.length != 10 || in.available() != 0) {
61            throw new Exception("Second read error");
62        }
63        // 20>10, readAll means failure
64        in = new ByteArrayInputStream(new byte[10]);
65        try {
66            bs = IOUtils.readFully(in, 20, true);
67            throw new Exception("Third read error");
68        } catch (EOFException e) {
69            // OK
70        }
71        int bignum = 10 * 1024 * 1024;
72        bs = IOUtils.readFully(new SuperSlowStream(bignum), -1, true);
73        if (bs.length != bignum) {
74            throw new Exception("Fourth read error");
75        }
76
77        // Test DerValue
78        byte[] input = {0x04, (byte)0x84, 0x40, 0x00, 0x42, 0x46, 0x4b};
79        try {
80            new DerValue(new ByteArrayInputStream(input));
81        } catch (IOException ioe) {
82            // This is OK
83        }
84    }
85}
86
87/**
88 * An InputStream contains a given number of bytes, but only returns one byte
89 * per read.
90 */
91class SuperSlowStream extends InputStream {
92    private int p;
93    /**
94     * @param Initial capacity
95     */
96    public SuperSlowStream(int capacity) {
97        p = capacity;
98    }
99    @Override
100    public int read() throws IOException {
101        if (p > 0) {
102            p--;
103            return 0;
104        } else {
105            return -1;
106        }
107    }
108    @Override
109    public int read(byte b[], int off, int len) throws IOException {
110        if (len == 0) return 0;
111        if (p > 0) {
112            p--;
113            b[off] = 0;
114            return 1;
115        } else {
116            return -1;
117        }
118    }
119}
120