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("PNG image doesn't contain required PLTE chunk")))){ 65 throw e; 66 } 67 } 68 } 69 } 70