1 /*

     2  * Copyright 2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /**

    25  * @test

    26  * @bug 4879507

    27  * @summary ZipInputStream does not check CRC for stored (uncompressed) files

    28  * @author Dave Bristor

    29  */

    30 

    31 import java.io.*;

    32 import java.util.Arrays;

    33 import java.util.zip.*;

    34 

    35 public class StoredCRC {

    36     public static void realMain(String[] args) throws Throwable {

    37 

    38         ByteArrayOutputStream baos = new ByteArrayOutputStream();

    39         ZipOutputStream zos = new ZipOutputStream(baos);

    40 

    41         ZipEntry ze = new ZipEntry("test");

    42         ze.setMethod(ZipOutputStream.STORED);

    43 

    44         String writtenString = "hello, world";

    45         byte[] writtenData = writtenString.getBytes("ASCII");

    46         ze.setSize(writtenData.length);

    47         CRC32 crc = new CRC32();

    48         crc.update(writtenData);

    49         ze.setCrc(crc.getValue());

    50 

    51         zos.putNextEntry(ze);

    52         zos.write(writtenData, 0, writtenData.length);

    53         zos.close();

    54 

    55         byte[] data = baos.toByteArray();

    56 

    57         // Run with an arg to create a test file that can be used to figure

    58         // out what position in the data stream can be changed.

    59         if (args.length > 0) {

    60             FileOutputStream fos = new FileOutputStream("stored.zip");

    61             fos.write(data, 0, data.length);

    62             fos.close();

    63         } else {

    64             // Test that reading byte-at-a-time works

    65             ZipInputStream zis = new ZipInputStream(

    66                 new ByteArrayInputStream(data));

    67             ze = zis.getNextEntry();

    68             int pos = 0;

    69             byte[] readData = new byte[256];

    70             try {

    71                 int count = zis.read(readData, pos, 1);

    72                 while (count > 0) {

    73                     count = zis.read(readData, ++pos, 1);

    74                 }

    75                 check(writtenString.equals(new String(readData, 0, pos, "ASCII")));

    76             } catch (Throwable t) {

    77                 unexpected(t);

    78             }

    79 

    80             // Test that data corruption is detected.  Offset 39 was

    81             // determined to be in the entry's uncompressed data.

    82             data[39] ^= 1;

    83 

    84             zis = new ZipInputStream(

    85                 new ByteArrayInputStream(data));

    86             ze = zis.getNextEntry();

    87 

    88             try {

    89                 zis.read(readData, 0, readData.length);

    90                 fail("Did not catch expected ZipException" );

    91             } catch (ZipException ex) {

    92                 String msg = ex.getMessage();

    93                 check(msg != null && msg.startsWith("invalid entry CRC (expected 0x"));

    94             } catch (Throwable t) {

    95                 unexpected(t);

    96             }

    97         }

    98     }

    99 

   100     //--------------------- Infrastructure ---------------------------

   101     static volatile int passed = 0, failed = 0;

   102     static boolean pass() {passed++; return true;}

   103     static boolean fail() {failed++; Thread.dumpStack(); return false;}

   104     static boolean fail(String msg) {System.out.println(msg); return fail();}

   105     static void unexpected(Throwable t) {failed++; t.printStackTrace();}

   106     static boolean check(boolean cond) {if (cond) pass(); else fail(); return cond;}

   107     static boolean equal(Object x, Object y) {

   108         if (x == null ? y == null : x.equals(y)) return pass();

   109         else return fail(x + " not equal to " + y);}

   110     public static void main(String[] args) throws Throwable {

   111         try {realMain(args);} catch (Throwable t) {unexpected(t);}

   112         System.out.println("\nPassed = " + passed + " failed = " + failed);

   113         if (failed > 0) throw new AssertionError("Some tests failed");}

   114 }