1 /*

     2  * Copyright (c) 2017, 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 import static java.util.zip.ZipFile.CENOFF;

    25 import static java.util.zip.ZipFile.CENTIM;

    26 import static java.util.zip.ZipFile.ENDHDR;

    27 import static java.util.zip.ZipFile.ENDOFF;

    28 import static java.util.zip.ZipFile.LOCTIM;

    29 

    30 import java.io.IOException;

    31 import java.io.InputStream;

    32 import java.io.OutputStream;

    33 import java.nio.file.Files;

    34 import java.nio.file.Path;

    35 import java.time.Instant;

    36 import java.time.LocalDate;

    37 import java.time.ZoneId;

    38 import java.util.zip.ZipEntry;

    39 import java.util.zip.ZipFile;

    40 import java.util.zip.ZipOutputStream;

    41 

    42 /* @test

    43  * @bug 8184940

    44  * @summary JDK 9 rejects zip files where the modified day or month is 0

    45  * @author Liam Miller-Cushon

    46  */

    47 public class ZeroDate {

    48 

    49     public static void main(String[] args) throws Exception {

    50         // create a zip file, and read it in as a byte array

    51         Path path = Files.createTempFile("bad", ".zip");

    52         try (OutputStream os = Files.newOutputStream(path);

    53                 ZipOutputStream zos = new ZipOutputStream(os)) {

    54             ZipEntry e = new ZipEntry("x");

    55             zos.putNextEntry(e);

    56             zos.write((int) 'x');

    57         }

    58         int len = (int) Files.size(path);

    59         byte[] data = new byte[len];

    60         try (InputStream is = Files.newInputStream(path)) {

    61             is.read(data);

    62         }

    63         Files.delete(path);

    64 

    65         // year, month, day are zero

    66         testDate(data.clone(), 0, LocalDate.of(1979, 11, 30));

    67         // only year is zero

    68         testDate(data.clone(), 0 << 25 | 4 << 21 | 5 << 16, LocalDate.of(1980, 4, 5));

    69     }

    70 

    71     private static void testDate(byte[] data, int date, LocalDate expected) throws IOException {

    72         // set the datetime

    73         int endpos = data.length - ENDHDR;

    74         int cenpos = u16(data, endpos + ENDOFF);

    75         int locpos = u16(data, cenpos + CENOFF);

    76         writeU32(data, cenpos + CENTIM, date);

    77         writeU32(data, locpos + LOCTIM, date);

    78 

    79         // ensure that the archive is still readable, and the date is 1979-11-30

    80         Path path = Files.createTempFile("out", ".zip");

    81         try (OutputStream os = Files.newOutputStream(path)) {

    82             os.write(data);

    83         }

    84         try (ZipFile zf = new ZipFile(path.toFile())) {

    85             ZipEntry ze = zf.entries().nextElement();

    86             Instant actualInstant = ze.getLastModifiedTime().toInstant();

    87             Instant expectedInstant =

    88                     expected.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant();

    89             if (!actualInstant.equals(expectedInstant)) {

    90                 throw new AssertionError(

    91                         String.format("actual: %s, expected: %s", actualInstant, expectedInstant));

    92             }

    93         } finally {

    94             Files.delete(path);

    95         }

    96     }

    97 

    98     static int u8(byte[] data, int offset) {

    99         return data[offset] & 0xff;

   100     }

   101 

   102     static int u16(byte[] data, int offset) {

   103         return u8(data, offset) + (u8(data, offset + 1) << 8);

   104     }

   105 

   106     private static void writeU32(byte[] data, int pos, int value) {

   107         data[pos] = (byte) (value & 0xff);

   108         data[pos + 1] = (byte) ((value >> 8) & 0xff);

   109         data[pos + 2] = (byte) ((value >> 16) & 0xff);

   110         data[pos + 3] = (byte) ((value >> 24) & 0xff);

   111     }

   112 }