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Jadclipse plugin not working? Here is the solution and a story..

Jadclipse plugin not working? Here is the solution and a story..

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The other day, I found myself needing to reverse engineer a java class. Some may wonder why, and the answer would be that this jar file composer must not have known about javadoc, and likes to write methods with lots of inputs and vague method parameter names. I thought that it wasn’t going to be such a bad deal because Eclipse has a great plugin called JadClipse that can decompile class files stuck in compiled jar file libraries. Little did I know, the maintainer of JadClipse swiftly left the planet circa eclipse 3.4 release, leaving everyone sorta hanging.

This led me down the road of trying to figure out how to get the whole thing working with older files and all that good stuff. Of course, the last time I used Jad was on a system I no longer have. Well, I tried the handy eclipse plugin system and diligently entered the eclipse 3.4 plugin that someone got sick of not having and wrote. I rebooted eclipse, and low and behold, the stupid thing wasn’t working.

You may now be thinking: “well most eclipse plugins work right out of the box”, and with that statement, you would be correct. This one however, did not.

I started brainstorming what it could possibly be, and a lot of ideas ran through my head such as: “maybe the new guy who took up the reigns of the Jadclipse plugin doesn’t know WTF he is doing, kinda like the guy who wrote this jar file”. A quick jaunt around the web proved this not to be the case, as lots of people claimed to have gotten this new Jadclipse 3.4 plugin working just fine. Next, “could it be user error”? Maybe I forgot to flip the bit that designates Jadclipse the new class file viewer, rather than the OOTB eclipse compiled class viewer, which is less than helpful in my situation. Of course, that wasn’t it.. Jadclipse duly installed itself and flipped its default .class file viewer setting.

Then the epiphany. Jad was a command line decompiler only back in the day. I didn’t have the command line decompiler installed, and the Jadclipse plugin simply uses the output of the jad command line decompiler and then reads the files generated into eclipse.

Simply locating a mirror of the jad decompiler, then placing it in the java path, I now had the command line decompiler working. I quickly checked to see if eclipse was now doing its magic and showing me the source, and it was.

So.. pro tip: if you can’t seem to get the JadClipse plugin working for versions of eclipse later than 3.4 (and probably any version of eclipse for that matter), make sure you have the old school jad decompiler  in your path somewhere. You can tell if it is there by popping a command prompt and typing jad. Good luck!

Stock Honda ECU code dump repository

Stock Honda ECU code dump repository

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For those of you looking for stock Honda binaries for various honda ECU’s, look no further than the great PGMFI ECU definition wiki  page related to the subject mirrored here on mycomputerninja.com. In the repository, you will find the stock basemaps and bin files for most obd0 and obd1 honda factory ECUs. These binaries can be used to return an aftermarket chipped ecu back to its original state, especially in the obd0 range where there is no jumper to pull to revert to factory settings. They also make a great starting point for basemaps on cars needing to be tuned. I have used many of the binaries in this repository, and thought I would write a quick note to let people know that this great resource is still around. The entire pgmfi wiki is mirrored here on mycomputerninja.com, and you can find the main library page simply by following (and bookmarking!) this link.

You Alone Can Save The Internet By Factoring This Number

You Alone Can Save The Internet By Factoring This Number

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A hot topic in security research communities as of late is the Conficker B worm. This worm has infected nearly 10 million computers around the globe, and doesnt seem to be slowing down. The worm uses several different technologies to secure its payload, obscuring its contents and its intentions from researchers who wish to disable it. One of these technologies is RSA 4094, which is a very strong flavor of public key encryption. This encryption is used to obscure the contents of software delivered to infected machines, which seem to include updates to the worms code, and command and control information relayed from whoever is responsible for the worm. The encryption, however, has a unique weakness.

RSA’s security lies in the difficulty of factoring extremely large composite numbers Semi-Prime numbers quickly. A semi-prime compsite number is the product of 2 primes. Semi-prime Composite numbers have a unique property in that they only have 4 factors, 1 and itself, and each of the  prime numbers used to create it.

The semi-prime modulus of Conficker is known, and so far its only known weakness is the inability of researchers to crack the encryption on the payload of the worm. If we could crack the encryption, we may be able to provide a payload for conficker that disables the worm all together. Some may note that cracking RSA 4094 is currently thought to be unfeasible, but I say it is only unfeasible if you don’t try.  Without further adue, the Modulus of conficker:

Modulus: size = 256 words = 4094 bits

88A8BEE7 7DED455C 41CD6883 2C79C3B2 BC4D7333 4C801030 96846399 ECDB7018 CAFE9CDD B5263FBA B749DA71 441FFD7F 2D179ADF C4031AE3 3AF0EB57 D4086357

A30F204B 744CAEF5 06443787 00D5E18A 485BC1AD 0BE12269 2E6B7924 CB3F9D36 D2130437 3366D8C0 97D227BD 61DAF2E5 95A3B0D3 A76030BA 5249A1CC FBA5B7FA

ECFA3218 25BD3CAD E6DCE7D6 ED7104DC 4992AA42 07F91D7E 9247CB15 A800C61E 0EF33ACF 9CC24C76 08701C1A B047261B C80DF107 7A5D9E2D A28E983C 9DB1835B

09404D47 2D58E6B6 1C2C8A60 26BD6B76 B13400BC D6B7D9ED 9721E605 EEF95D08 53A64B60 7398D7FD D1FC30CD 4A29DE21 3D315A49 EB6AE350 74D7D161 7ED4993B

E435259A A8D920C3 56E53DC8 3972665D 23F17BDC C69E9393 A87D628A 6811EE23 7E386DEC 02DADFEB BB6AD6F3 D930A4E5 8AC26CE4 13659917 3140864C 605B400C

BB43338E 938A8712 F97E9E45 93E92944 CC880FCB 14349915 5FF6C269 AF873383 8045DBD2 BF802693 8A08DA5B 319EC35B BCFCCF8C 578E9E8D CC03D4BC B6DA1CEA

10D57010 92AD0968 B6985FF2 FFC6C9A2 2989D649 F24D2F2F 4DF38C9D 2E2472AF 4CF2D003 D86AA6DE 422B5CD7 9FC8901B 39455258 E93DB6B2 2D9A7897 FB59E1DD

B385DF72 7E83E2CB 25418501 967F5912 4DADA619 3603E8EC 42934976 333406E6 21E95687 CD44E85E F375EB4B 8BF0723C BA1B4C72 D61E44E6 4912CA45 F52DA7E7