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 8190512 27 * @summary Test verifies whether PNGImageReader throws IIOException with proper 28 * message or not when IHDR chunk contains negative value for width 29 * and height. 30 * @run main PngNegativeDimensionTest 31 */ 32 import java.io.ByteArrayInputStream; 33 import java.io.InputStream; 34 import java.util.Base64; 35 import javax.imageio.ImageIO; 36 37 public class PngNegativeDimensionTest { 38 39 private static String negativeWidthString = "iVBORw0KGgoAAAANSUhEUoAAAAEAA" 40 + "AABCAAAAAA6fptVAAAACklEQVQYV2P4DwABAQEAWk1v8QAAAABJRU5ErkJgggo="; 41 42 private static String negativeHeightString = "iVBORw0KGgoAAAANSUhEUgAAAAGAA" 43 + "AABCAAAAAA6fptVAAAACklEQVQYV2P4DwABAQEAWk1v8QAAAABJRU5ErkJgggo="; 44 45 private static InputStream input; 46 private static Boolean failed = false; 47 48 public static void main(String[] args) { 49 // Create InputStream 50 byte[] inputBytes = Base64.getDecoder().decode(negativeWidthString); 51 input = new ByteArrayInputStream(inputBytes); 52 // Attempt to read PNG with negative IHDR width 53 readNegativeIHDRWidthImage(); 54 55 inputBytes = Base64.getDecoder().decode(negativeHeightString); 56 input = new ByteArrayInputStream(inputBytes); 57 // Attempt to read PNG with negative IHDR height 58 readNegativeIHDRHeightImage(); 59 60 if (failed) { 61 throw new RuntimeException("Test didnt throw proper IIOException" 62 + " when IHDR width/height is negative"); 63 } 64 } 65 66 private static void readNegativeIHDRWidthImage() { 67 try { 68 ImageIO.read(input); 69 } catch (Exception e) { 70 /* 71 * We expect the test case to throw IIOException with message 72 * under root cause as "Image width <= 0!". If it throws 73 * any other message or exception test will fail. 74 */ 75 Throwable cause = e.getCause(); 76 if (cause == null || 77 (!(cause.getMessage().equals("Image width <= 0!")))) 78 { 79 failed = true; 80 } 81 } 82 } 83 84 private static void readNegativeIHDRHeightImage() { 85 try { 86 ImageIO.read(input); 87 } catch (Exception e) { 88 /* 89 * We expect the test case to throw IIOException with message 90 * under root cause as "Image height <= 0!". If it throws 91 * any other message or exception test will fail. 92 */ 93 Throwable cause = e.getCause(); 94 if (cause == null || 95 (!(cause.getMessage().equals("Image height <= 0!")))) 96 { 97 failed = true; 98 } 99 } 100 } 101 } 102