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 /*

    25  * @test

    26  * @bug     8190997

    27  * @summary Test verifies that ImageIO.read() throws proper IIOException

    28  *          when we have a PNG image with color type PNG_COLOR_PALETTE but

    29  *          missing the required PLTE chunk.

    30  * @run     main PngPLTEChunkMissingTest

    31  */

    32 

    33 import java.io.ByteArrayInputStream;

    34 import java.io.InputStream;

    35 import java.util.Base64;

    36 import javax.imageio.IIOException;

    37 import javax.imageio.ImageIO;

    38 

    39 public class PngPLTEChunkMissingTest {

    40 

    41     // PNG image stream missing the required PLTE chunk

    42     private static String inputImageBase64 = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAAB"

    43             + "CAMAAAA6fptVAAAACklEQVQYV2P4DwABAQEAWk1v8QAAAABJRU5ErkJgggo=";

    44 

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

    46 

    47         byte[] inputBytes = Base64.getDecoder().decode(inputImageBase64);

    48         InputStream in = new ByteArrayInputStream(inputBytes);

    49 

    50         /*

    51          * Attempt to read a PNG image of color type PNG_COLOR_PALETTE

    52          * but missing the required PLTE chunk.

    53          */

    54         try {

    55             ImageIO.read(in);

    56         } catch (IIOException e) {

    57             /*

    58              * We expect ImageIO to throw IIOException with proper message

    59              * instead of throwing NullPointerException.

    60              */

    61             Throwable cause = e.getCause();

    62             if (cause == null ||

    63                 (!(cause.getMessage().

    64                  equals("Required PLTE chunk missing"))))

    65             {

    66                 throw e;

    67             }

    68         }

    69     }

    70 }

    71