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Microsoft sends GitHub DMCA shutdown for Skype open source project

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Re: Microsoft sends GitHub DMCA shutdown for Skype open source project

#31

Post by e1ven »

eli wrote: post #30
wmf wrote: post #14

Earlier quoted context omitted.

It's hard, but people have made progress with that approach: http://recon.cx/en/f/vskype-part1.pdf http://recon.cx/en/f/vskype-part2.pdf

Those links detail reverse engineering the binary. I think Iv's point is that reverse engineering an existing binary is not what "clean room" means.

If team A uses the binary to write a spec, and team B uses the spec to re-implement without direct help from team A, it's generally considered legit.

This was the method used by Compaq to implement the IBM BIOS, back in the day.

Re: Microsoft sends GitHub DMCA shutdown for Skype open source project

#32

Post by tonycoco »

eli wrote: post #28
tonycoco wrote: post #18

MS can't catch a break... They defend their copyrights and get slammed on Hacker News for not being "cool" with the OSS community infringing on their properties. Weak sauce, Hacker News.

Where do you see people slamming Microsoft in this thread?

The post of this just implied, to me, that Microsoft is evil for putting in a take-down request. Why else post this? There are literally hundreds of take-down notices on GitHub. Why post this one?

Re: Microsoft sends GitHub DMCA shutdown for Skype open source project

#33

Post by calloc »

tonycoco wrote: post #32
eli wrote: post #28

Earlier quoted context omitted.

Where do you see people slamming Microsoft in this thread?

The post of this just implied, to me, that Microsoft is evil for putting in a take-down request. Why else post this? There are literally hundreds of take-down notices on GitHub. Why post this one?

Flag the post and move on. I don't see any Microsoft hating here, most of the posts are about Microsoft being in their right to take down a project that uses their copyrighted binaries and is distributing them wholesale after adding some extra code...

Re: Microsoft sends GitHub DMCA shutdown for Skype open source project

#34

Post by recoiledsnake »

Iv wrote: post #13
Xuzz wrote: post #5

Please note: this is not an attempt to clean-room reverse engineer Skype, or even to reverse engineer and create an open-source replacement. As shown with things like WINE, Microsoft does not (and probably cannot) take them down. No, that's not what "Skype Open Source" project is. This is a confusingly misnamed attempt to attach code to patched copies of copyrighted official Skype clients. Microsoft is not overreachi…

How exactly is one supposed to make a clean-room reverse engineering in the absence of any documentation and sophisticated obfuscation on Skype's part ?

Maybe then you're not "supposed" to do it?

For example, there is no reverse engineered libraries for Facetime and iOS API. If you use Apple's libraries, they can come after you for copyright infringement.

Re: Microsoft sends GitHub DMCA shutdown for Skype open source project

#35

Post by cooldeal »

eli wrote: post #28
tonycoco wrote: post #18

MS can't catch a break... They defend their copyrights and get slammed on Hacker News for not being "cool" with the OSS community infringing on their properties. Weak sauce, Hacker News.

Where do you see people slamming Microsoft in this thread?

Here? http://news.ycombinator.com/item?id=3919881

Re: Microsoft sends GitHub DMCA shutdown for Skype open source project

#36

Post by recoiledsnake »

nextparadigms wrote: post #15

So much for Microsoft loving the open-source movement.

I guess Google too hates open source since they won't release their proprietary modifications to the Linux kernel and their search engine code and will go after anyone getting them and putting it on Github.

Re: Microsoft sends GitHub DMCA shutdown for Skype open source project

#37

Post by ktizo »

recoiledsnake wrote: post #34
Iv wrote: post #13

Earlier quoted context omitted.

How exactly is one supposed to make a clean-room reverse engineering in the absence of any documentation and sophisticated obfuscation on Skype's part ?

Maybe then you're not "supposed" to do it? For example, there is no reverse engineered libraries for Facetime and iOS API. If you use Apple's libraries, they can come after you for copyright infringement.

You can reverse engineer anything that you can reverse engineer. "Supposed" really doesn't come into it. If you buy a copy of osx and reverse engineer some libraries, then publish a description of their behaviour, so what?

Re: Microsoft sends GitHub DMCA shutdown for Skype open source project

#38

Post by skypeopensource »

kcbanner wrote: post #16
nextparadigms wrote: post #15

So much for Microsoft loving the open-source movement.

heh, did you look at the project? It's not open source, it's a decompiled Skype binary.

No, its not. Decompiled binary just need for reversing. Open source clone of skype is Epycs(reverse enginered skype). https://github.com/skypeopensource/epycs

Re: Microsoft sends GitHub DMCA shutdown for Skype open source project

#39

Post by skypeopensource »

uxp wrote: post #22
Canuteson wrote: post #4

So I guess they should rename it Skipe open source.

"Skype: patched and recompiled to do other stuff" is a better title. Decompiling a proprietary product, changing a few lines of code, and then releasing that code doesn't make it "open source", it makes it stolen code (semantics of "piracy is not theft" aside, it's still not his code to be releasing in it's entirety.).

You are wrong. Decompiling is just allowing research deeper in skype-black-box. Project itself is here https://github.com/skypeopensource/epycs

Re: Microsoft sends GitHub DMCA shutdown for Skype open source project

#40

Post by skypeopensource »

Xuzz wrote: post #5

Please note: this is not an attempt to clean-room reverse engineer Skype, or even to reverse engineer and create an open-source replacement. As shown with things like WINE, Microsoft does not (and probably cannot) take them down. No, that's not what "Skype Open Source" project is. This is a confusingly misnamed attempt to attach code to patched copies of copyrighted official Skype clients. Microsoft is not overreachi…

You are wrong. You eyes are blind by hating. Stop. Listen the Nature.

Skype-open-source code here: https://github.com/skypeopensource/epycs

repo was closed because i host in download section deobfuscated skype5.5 binary, my fault.

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