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#2185 MochiCrypt decryption throws null pointer exception on specific SWF
Author: user nosamu
Date created:
Type: bug
Visibility: Everybody
Assigned to:
Labels: Packers
State: upgraded Help

> What steps will reproduce the problem? 1. Turn on "Auto load embedded SWFs" in FFDec's advanced settings 2. Try to open the attached SWF in FFDec. > What is the expected output? What do you see instead? I expect FFDec to successfully open the SWF. And ideally it would also be able to load the embedded encrypted SWF. Instead the SWF fails to load. The dialog says: "Cannot load SWF file: java.lang.NullPointerException" > What version of the product are you using? Is it "nightly build"? Which operating system do you have? FFDEC version: 20.1.0 nightly 2761 Operating system: Windows 10 64-bit > Please provide any additional information below. If the problem is related to a SWF file, attach it here, otherwise we can't help you. Here is the full error: java.util.concurrent.ExecutionException: java.lang.NullPointerException at java.util.concurrent.FutureTask.report(Unknown Source) at java.util.concurrent.FutureTask.get(Unknown Source) at com.jpexs.helpers.CancellableWorker.get(CancellableWorker.java:126) at com.jpexs.decompiler.flash.gui.Main.parseOpenable(Main.java:1310) at com.jpexs.decompiler.flash.gui.Main$OpenFileWorker.doInBackground(Main.java:1585) at javax.swing.SwingWorker$1.call(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at javax.swing.SwingWorker.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException at com.jpexs.decompiler.flash.tags.DefineBinaryDataTag.loadEmbeddedSwf(DefineBinaryDataTag.ja va:136) at com.jpexs.decompiler.flash.SWF.loadAllEmbeddedSwfs(SWF.java:1503) at com.jpexs.decompiler.flash.SWF.<init>(SWF.java:1470) at com.jpexs.decompiler.flash.SWF.<init>(SWF.java:1403) at com.jpexs.decompiler.flash.gui.Main$10.open(Main.java:1125) at com.jpexs.decompiler.flash.gui.Main$10.doInBackground(Main.java:1299) at com.jpexs.decompiler.flash.gui.Main$10.doInBackground(Main.java:1083) at com.jpexs.helpers.CancellableWorker$1.call(CancellableWorker.java:61) at java.util.concurrent.FutureTask.run(Unknown Source) at com.jpexs.helpers.CancellableWorker.run(CancellableWorker.java:78) ... 3 more
Downloadpwong.swf (5,022 KiB)
JPEXS
admin
This file contains new kind of MochiCrypt packer - I call it 16 bit as it uses 16 bit length field. Previously only 32bit MochiCrypt was supported. In nightly 2763, I added support for 16bit MochiCrypt. Unfortunately, as multiple MochiCrypt packers are available, one cannot be sure which one to use. So automatic loading is not possible in this case. You need to select proper unpacker with context menu "Use unpacker".
State: new→upgraded