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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 6945174
* @summary Test verifies that PNG image readr throw correct exception
* if image contains a chunk with incorrect length.
* @run main ReadMalformedPngTest
*/
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.imageio.IIOException;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.metadata.IIOMetadataNode;
import javax.imageio.stream.ImageOutputStream;
import org.w3c.dom.Node;
public class ReadMalformedPngTest {
public static void main(String[] args) throws IOException {
ByteArrayInputStream bais = new ByteArrayInputStream(createTestPng());
IIOException expected = null;
try {
ImageIO.read(bais);
} catch (IIOException e) {
expected = e;
} catch (Throwable e) {
throw new RuntimeException("Test failed!", e);
}
if (expected == null) {
throw new RuntimeException("Test failed.");
}
System.out.println("Test passed.");
}
private static byte[] createTestPng() throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
BufferedImage img = createTestImage();
try {
ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
ImageWriter w = ImageIO.getImageWritersByFormatName("PNG").next();
w.setOutput(ios);
ImageWriteParam p = w.getDefaultWriteParam();
ImageTypeSpecifier t = ImageTypeSpecifier.createFromRenderedImage(img);
IIOMetadata m = w.getDefaultImageMetadata(t, p);
String nativeMetadataFormat = m.getNativeMetadataFormatName();
Node root = m.getAsTree(nativeMetadataFormat);
IIOMetadataNode textEntry = new IIOMetadataNode("tEXtEntry");
textEntry.setAttribute("keyword", "comment");
textEntry.setAttribute("value", "This is a test image for JDK-6945174");
IIOMetadataNode text = new IIOMetadataNode("tEXt");
text.appendChild(textEntry);
root.appendChild(text);
m.mergeTree(nativeMetadataFormat, root);
IIOImage iio_img = new IIOImage(img, null, m);
w.write(iio_img);
w.dispose();
ios.flush();
ios.close();
} catch (IOException e) {
throw new RuntimeException("Test failed.", e);
}
baos.flush();
byte[] data = baos.toByteArray();
adjustCommentLength(Integer.MAX_VALUE + 0x1000, data);
return data;
}
private static void adjustCommentLength(int v, byte[] data) {
final int pos = getCommentPos(data);
data[pos + 3] = (byte) (v & 0xFF);
v = v >> 8;
data[pos + 2] = (byte) (v & 0xFF);
v = v >> 8;
data[pos + 1] = (byte) (v & 0xFF);
v = v >> 8;
data[pos + 0] = (byte) (v & 0xFF);
}
private static int getCommentPos(byte[] d) {
int p = 8;
while (p + 8 < d.length) {
if (d[p + 4] == (byte) 0x74 && d[p + 5] == (byte) 0x45 &&
d[p + 6] == (byte) 0x58 && d[p + 7] == (byte) 0x74)
{
return p;
}
p++;
}
throw new RuntimeException("Test chunk was not found!");
}
private static BufferedImage createTestImage() {
final int w = 128;
final int h = 128;
BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_3BYTE_BGR);
Graphics2D g = img.createGraphics();
g.setPaint(new GradientPaint(0, 0, Color.blue,
w, h, Color.red));
g.fillRect(0, 0, w, h);
g.dispose();
return img;
}
}
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