1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Skype Open-Source Back In Action, Breaks v5.5

Free Software

Published on 27 March 2012 08:59 AM EDT
Written by Michael Larabel in Free Software
19 Comments

After a several month hiatus, the individual(s) working to reverse-engineer Skype's binary client have successfully "deobfuscated" the Skype 5.5 release.

"We got deobfuscated skype v5.5!!! I can't belive in this. But its fucking true. Great thanks and congratulations going to Vilko," begins a new post on the skype-open-source blog.

Additionally said by this community-focused project to provide an open-source Skype implementation, "Skype version 5.5 is a hybrid of GUI on delphi and embedded dll with skype "kernel". This kernel is fully independent structure in binary code - code block, data block, imports. And it was built with use of VC compiler(exists VC lib signatures). This kernel has not contain any reference to external code/data in delphi part. And only entry point block xrefs on kernel from delphi GUI. It can be saved as independent binary code with dll-header, and that kernel will work, i tested this." Basically this means they could implement an (open-source) Skype client independent from the main Skype GUI.

It was last June that I originally reported on the Skype client being reverse-engineered, which is when the Microsoft-owned Skype informed me they were going after the reverse-engineers citing "nefarious attempts to subvert Skype's experience." Microsoft/Skype began volleying DMCA take-down notices towards this open-source Skype work. After a few months, not much was heard of on this Skype reverse-engineering work until now.

The original Skype reverse-engineering work was upon an older version of Skype, but now with this latest attempt they are up to version 5.5. With the new version it illustrates more potential since the core code is separated from the GUI layer, but still Microsoft/Skype is likely to take action. With that said, and the fact that they're decompiling/deobfuscating the code as opposed to another clean-room reverse-engineering approach, I wouldn't expect to see open-source Skype support land in any popular open-source desktop programs in the foreseeable future.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. AMD Launches New FX CPUs, Cuts Prices On Existing Processors
  2. Preview: AMD's FX-9590 Eight-Core At Up To 5.0GHz On Linux
  3. Intel Launches The Core i7 5960X, Mighty Powerful Haswell-E CPUs
  4. AMD Radeon R9 290: Gallium3D vs. Catalyst Drivers
Latest Linux Articles
  1. Ondemand vs. Performance CPU Governing For AMD FX CPUs On Linux 3.17
  2. How Intel Graphics On Linux Compare To Open-Source AMD/NVIDIA Drivers
  3. The Fastest NVIDIA GPUs For Open-Source Nouveau With Steam Linux Gaming
  4. Testing For The Latest Linux Kernel Power Regression
Latest Linux News
  1. New Group Calls For Boycotting Systemd
  2. The Features To Find With The Imminent Release Of LLVM/Clang 3.5
  3. Borderlands 2 Is Coming To Linux
  4. The Witcher 2 Ups The Performance More & Works Around Catalyst Bug
  5. Running Gallium3D's LLVMpipe On The Eight-Core 5GHz CPU
  6. Trying Intel OpenCL On Linux For Video Encoding
  7. GSoC 2014 Yielded Some Improvements For Mesa/X.Org This Year
  8. webOS Lives On As LuneOS With New Release
  9. Marek Lands Radeon Gallium3D HyperZ Improvements
  10. Mozilla Firefox 32 Surfaces With HTML5, Developer Changes
Latest Forum Discussions
  1. Lennart Poettering Talks Up His New Linux Vision That Involves Btrfs
  2. nv and xorg.conf under Debian PPC
  3. AMD graphics doesn't work with AMD Catalyst drivers
  4. Best Radeon for a Power Mac G5?
  5. The dangers of Linux kernel development
  6. Updated and Optimized Ubuntu Free Graphics Drivers
  7. AMD Releases UVD Video Decode Support For R600 GPUs
  8. SSD seems slow