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 
  31 import java.io.*;
  32 import sun.security.util.*;

  33 
  34 public 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  */
  91 class 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 }
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