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.misc
  29  *          java.base/sun.security.util
  30  */
  31 
  32 import java.io.*;
  33 import sun.security.util.*;
  34 import sun.misc.IOUtils;
  35 
  36 public class BadValue {
  37 
  38     public static void main(String[] args) throws Exception {
  39 
  40         // Test IOUtils.readFully
  41 
  42         // We have 4 bytes
  43         InputStream in = new ByteArrayInputStream(new byte[10]);
  44         byte[] bs = IOUtils.readFully(in, 4, true);
  45         if (bs.length != 4 || in.available() != 6) {
  46             throw new Exception("First read error");
  47         }
  48         // But only 6 left
  49         bs = IOUtils.readFully(in, 10, false);
  50         if (bs.length != 6 || in.available() != 0) {
  51             throw new Exception("Second read error");
  52         }
  53         // MAX read as much as it can
  54         in = new ByteArrayInputStream(new byte[10]);
  55         bs = IOUtils.readFully(in, Integer.MAX_VALUE, true);
  56         if (bs.length != 10 || in.available() != 0) {
  57             throw new Exception("Second read error");
  58         }
  59         // MAX ignore readAll
  60         in = new ByteArrayInputStream(new byte[10]);
  61         bs = IOUtils.readFully(in, Integer.MAX_VALUE, false);
  62         if (bs.length != 10 || in.available() != 0) {
  63             throw new Exception("Second read error");
  64         }
  65         // 20>10, readAll means failure
  66         in = new ByteArrayInputStream(new byte[10]);
  67         try {
  68             bs = IOUtils.readFully(in, 20, true);
  69             throw new Exception("Third read error");
  70         } catch (EOFException e) {
  71             // OK
  72         }
  73         int bignum = 10 * 1024 * 1024;
  74         bs = IOUtils.readFully(new SuperSlowStream(bignum), -1, true);
  75         if (bs.length != bignum) {
  76             throw new Exception("Fourth read error");
  77         }
  78 
  79         // Test DerValue
  80         byte[] input = {0x04, (byte)0x84, 0x40, 0x00, 0x42, 0x46, 0x4b};
  81         try {
  82             new DerValue(new ByteArrayInputStream(input));
  83         } catch (IOException ioe) {
  84             // This is OK
  85         }
  86     }
  87 }
  88 
  89 /**
  90  * An InputStream contains a given number of bytes, but only returns one byte
  91  * per read.
  92  */
  93 class SuperSlowStream extends InputStream {
  94     private int p;
  95     /**
  96      * @param Initial capacity
  97      */
  98     public SuperSlowStream(int capacity) {
  99         p = capacity;
 100     }
 101     @Override
 102     public int read() throws IOException {
 103         if (p > 0) {
 104             p--;
 105             return 0;
 106         } else {
 107             return -1;
 108         }
 109     }
 110     @Override
 111     public int read(byte b[], int off, int len) throws IOException {
 112         if (len == 0) return 0;
 113         if (p > 0) {
 114             p--;
 115             b[off] = 0;
 116             return 1;
 117         } else {
 118             return -1;
 119         }
 120     }
 121 }
--- EOF ---