svn commit: r1416772 - in /commons/proper/imaging/trunk/src: changes/changes.xml main/java/org/apache/commons/imaging/formats/tiff/TiffReader.java

[damjan]

Author: damjan
Date: Tue Dec  4 04:39:10 2012
New Revision: 1416772

URL: http://svn.apache.org/viewvc?rev=1416772&view=rev
Log:
Deal with JPEG images with bad block sizes.

Jira issue key: IMAGING-99
Submitted by: st.h <sth at lavabit dot com>


Modified:
    commons/proper/imaging/trunk/src/changes/changes.xml
    
commons/proper/imaging/trunk/src/main/java/org/apache/commons/imaging/formats/tiff/TiffReader.java

Modified: commons/proper/imaging/trunk/src/changes/changes.xml
URL: 
http://svn.apache.org/viewvc/commons/proper/imaging/trunk/src/changes/changes.xml?rev=1416772&r1=1416771&r2=1416772&view=diff
==============================================================================
--- commons/proper/imaging/trunk/src/changes/changes.xml (original)
+++ commons/proper/imaging/trunk/src/changes/changes.xml Tue Dec  4 04:39:10 
2012
@@ -245,6 +245,9 @@ The <action> type attribute can be add,u
       <action issue="IMAGING-90" dev="damjan" type="fix">
          Allow non-1 TIFF field lengths when parsing offset fields in 
non-strict mode.
       </action>
+      <action issue="IMAGING-99" dev="damjan" type="fix" due-to="st.h">
+         java.io.IOException: Could not read block
+      </action>
     </release>
     
   </body>

Modified: 
commons/proper/imaging/trunk/src/main/java/org/apache/commons/imaging/formats/tiff/TiffReader.java
URL: 
http://svn.apache.org/viewvc/commons/proper/imaging/trunk/src/main/java/org/apache/commons/imaging/formats/tiff/TiffReader.java?rev=1416772&r1=1416771&r2=1416772&view=diff
==============================================================================
--- 
commons/proper/imaging/trunk/src/main/java/org/apache/commons/imaging/formats/tiff/TiffReader.java
 (original)
+++ 
commons/proper/imaging/trunk/src/main/java/org/apache/commons/imaging/formats/tiff/TiffReader.java
 Tue Dec  4 04:39:10 2012
@@ -28,6 +28,7 @@ import org.apache.commons.imaging.common
 import org.apache.commons.imaging.common.ByteOrder;
 import org.apache.commons.imaging.common.bytesource.ByteSource;
 import org.apache.commons.imaging.common.bytesource.ByteSourceFile;
+import org.apache.commons.imaging.formats.jpeg.JpegConstants;
 import org.apache.commons.imaging.formats.tiff.TiffDirectory.ImageDataElement;
 import org.apache.commons.imaging.formats.tiff.constants.ExifTagConstants;
 import org.apache.commons.imaging.formats.tiff.constants.TiffConstants;
@@ -505,11 +506,16 @@ public class TiffReader extends BinaryFi
         ImageDataElement element = directory.getJpegRawImageDataElement();
         int offset = element.offset;
         int length = element.length;
-        // Sony DCR-PC110 has an off-by-one error.
-        if (offset + length == byteSource.getLength() + 1) {
-            length--;
+        // In case the length is not correct, adjust it and check if the last 
read byte actually is the end of the image
+        if (offset + length > byteSource.getLength()) {
+            length = (int) byteSource.getLength() - offset;
         }
         byte data[] = byteSource.getBlock(offset, length);
+        // check if the last read byte is actually the end of the image data
+        if (length < 2 ||
+                (((data[data.length - 2] & 0xff) << 8) | (data[data.length - 
1] & 0xff)) != JpegConstants.EOIMarker) {
+            throw new ImageReadException("JPEG EOI marker could not be found 
at expected location");
+        }
         return new JpegImageData(offset, length, data);
     }