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After DeCSS, DVD Jon Releases DeDRMS
An anonymous reader writes "Jon Lech Johansen, who reverse engineered FairPlay back in January, and wrote the decryption code that was later used by an anonymous developer to create the playfair utility, has released a similar utility: DeDRMS. It's only 230 lines. T-shirts anyone?"
Not that I have anything against C#, I actually find it quite nice, just stuck me as odd that someone would write a cracking toolin it. These things are traditionally written in C ( for speed ).... like DeCSS was.
Wow. This is written in C#. I wonder if we can get .NET banned now that we can prove it's used for illegal purposes :)
"In practice, the goal of maximizing publication regardless of the cost to freedom is supported by widespread rhetoric which asserts that public copying is illegitimate, unfair, and intrinsically wrong. For instance, the publishers call people who copy "pirates," a smear term designed to equate sharing information with your neighbor with attacking a ship. (This smear term was formerly used by authors to describe publishers who found lawful ways to publish unauthorized editions; its modern use by the publishers is almost the reverse.) This rhetoric directly rejects the Constitutional basis for copyright, but presents itself as representing the unquestioned tradition of the American legal system.
The "pirate" rhetoric is typically accepted because it blankets the media so that few people realize that it is radical. It is effective because if copying by the public is fundamentally illegitimate, we can never object to the publishers' demand that we surrender our freedom to do so. In other words, when the public is challenged to show why publishers should not receive some additional power, the most important reason of all -- "We want to copy" -- is disqualified in advance.
This leaves no way to argue against increasing copyright power except using side issues. Hence opposition to stronger copyright powers today almost exclusively cites side issues, and never dares cite the freedom to distribute copies as a legitimate public value."
Misinterpreting Copyright
Real, Inc.'s Realplayer now natively plays back iTMS purchases! It's Magic!
Perhaps for his next trick he will stand outside RIAA/MPAA headquaters holding a 6 foot neon sign that says SUE ME AGAIN!
I hope that eventually someone incorporates this code into a iTunes client for Linux, as it would be nice to be able to buy music from iTMS but I have no desire to buy a Mac.
Beep beep.
Lawsuits anyone?
SIG: TAKE OFF EVERY 'CAPTAIN'!!
This code shows with more simplicity than ever before how the FairPlay DRM scheme works. This can be used by programmers to add support for applications (i.e., GStreamer) to play encrypted files with a key produced from an iTunes username/password. It can be used by researchers to see any weaknesses in FairPlay and develop better methods. Unfortunately it can also be used by those who want to destroy the iTunes Music Service.
Interestingly, I believe the ideas could also be used to create files encrypted with a particular iTunes login, though perhaps I'm misunderstanding the scheme.
What does DVD-Jon have against Dr. Richard M. Stallman? Is this the utility that reverses changes made by RMS-Lint?
http://dilbert.com/comics/dilbert/archive/images/d ilbert2004042261455.jpg
A somewhat odd view... does anyone know which big music firm United Media (the Dilbert owners) is affiliated with?
Beep beep.
What will the dairy farmers of the world think when they discover their Dairy Records Management System has been compromised? I will never drink milk ever again!!!
-Erik -- --This message was written using 73% post-consumer electrons--
I was fortunate enough to load the page during the 1 minute that the server stayed up.
Now let's see how long my little mirror stays up!
http://fire.prohosting.com/xonerate/dedrms.txt
If you attempt the impossible -- and make no mistake, copy-prevention is physically impossible, not just difficult -- then you will fail. You might be able to fool people into thinking you have succeeded, for a short while; but, sooner or later, your lies will catch up with you. All copy-prevention technology is pure snake oil, and can never work. It will always be defeated. Once a single CPT-free version has been created, then every penny anyone ever invested in that particular copy-prevention technology is wasted.
Je fume. Tu fumes. Nous fûmes!
Stupid junk filter doesn't let me post this. Why oh why? Code after filler...
In the beginning God created the heaven and the earth.
2 And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
3 And God said, Let there be light: and there was light.
4 And God saw the light, that it was good: and God divided the light from the darkness.
5 And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day.
6 And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters.
7 And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so.
8 And God called the firmament Heaven. And the evening and the morning were the second day.
9 And God said, Let the waters under the heaven be gathered together unto one place, and let the dry land appear: and it was so.
10 And God called the dry land Earth; and the gathering together of the waters called he Seas: and God saw that it was good.
11 And God said, Let the earth bring forth grass, the herb yielding seed, and the fruit tree yielding fruit after his kind, whose seed is in itself, upon the earth: and it was so.
12 And the earth brought forth grass, and herb yielding seed after his kind, and the tree yielding fruit, whose seed was in itself, after his kind: and God saw that it was good.
13 And the evening and the morning were the third day.
14 And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:
15 And let them be for lights in the firmament of the heaven to give light upon the earth: and it was so.
16 And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also.
17 And God set them in the firmament of the heaven to give light upon the earth,
18 And to rule over the day and over the night, and to divide the light from the darkness: and God saw that it was good.
19 And the evening and the morning were the fourth day.
20 And God said, Let the waters bring forth abundantly the moving creature that hath life, and fowl that may fly above the earth in the open firmament of heaven.
21 And God created great whales, and every living creature that moveth, which the waters brought forth abundantly, after their kind, and every winged fowl after his kind: and God saw that it was good.
22 And God blessed them, saying, Be fruitful, and multiply, and fill the waters in the seas, and let fowl multiply in the earth.
23 And the evening and the morning were the fifth day.
24 And God said, Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind: and it was so.
25 And God made the beast of the earth after his kind, and cattle after their kind, and every thing that creepeth upon the earth after his kind: and God saw that it was good.
26 And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth.
27 So God created man in his own image, in the image of God created he him; male and female created he them.
28 And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth.
29 And God said, Behold, I have given you every herb bearing seed, which is upon the face of all the earth, and every tree, in the which is the fruit of a tree yielding seed; to you it shall be for meat.
30 And to every beast of the earth, and
I didn't expect it to be written in C#.
... surprise and fear ... fear and surprise ... Its two weapons are fear and surprise ... and ruthless efficiency ... Its three weapons are fear, surprise, and ruthless efficiency ... and an almost fanatical devotion to Redmond ... Its four ... no ... Amongst its weapons ... Amongst its weaponry ... are such elements as fear, surprise ... I'll try posting some other time.
NOBODY expects it to be written in C#!! Its chief weapon is surprise
"Oppression and harassment is a small price to pay to live in the land of the free." -- Montgomery Burns.
I think that basically what you're missing is that 'they' can't tell you what you can and can't do with their products after you purchase them.
Replace 'they' with any manufacturer.
I could buy an apple that said "not for use as food." And I could then proceed to eat that apple - they have no say in what I do with it. If, for some reason, I should injure myself by eating that apple, they warned me and wouldn't be held liable. That's it. Laws come into play when I throw that apple and kill someone with it. Or try to sell it, claiming it is a pair.
Now, the argument here is that it is illegal to decrypt the 'protections' a company puts on their music. And it is here where it gets smelly realy, really quickly.
Sure, it might be the law, but it is written to be a pretty shitty law. (DMCA, etc). No, that's not an excuse to break the law, but it is one to cause sympathy for someone who does. There are very legitimate reasons for breaking the DRM on these files. There are also very illegitimate ones. Piracy comes to mind. You know, real piracy. Not some 14 year old girl that wants to give her friend some songs, but the people who mass produce and sell these songs on the black market.
The black market being, by the way, about every outdoor market I've been to in Asia or South America.
And you're right. DVD Jon shouldn't fall under any US laws. But the RIAA et al. will surely find a way to change that. Bastards.
This same guy wrote DeCSS, FairPlay and DeCRMS....
wow. what a brilliant ballsy sun of a bitch.
because I have been enjoined by this Holy Office to abandon the false opinion which maintains that the Sun is the centre
I might expose myself to legal liability under the DMCA if I were to use my +2 karma bonus to publicly point out that a copy of the DeDRMS code may be found buried in the parent AC post (currently at 0, and NOT posted by myself) that I am replying to. The DMCA would expressly forbid such a reply informing others of the existence of such a post.
Therefore, I wish to state emphatically that the parent contains no C# whatsoever and should not be moderated up as Informative, cut, pasted, compiled, or disseminated.
No, it's not up to the player to enforce the DRM. When you purchase a song from iTunes you are given the DRM'ed file, an md5 hash of the file, and two keys. Not sure what the other key is for, but one is the encryption key. You put that with the song and you get a DRM free song. Thats exactly what this does. PS - Reverse engineering the iTMS is fun!
"But I'm still right here, giving blood and keeping faith. And I'm still right here."
Just imagine how much our software would would actually do if everyone wrote in hand optimized ASM. Say goodbye to handy things like instant messaging and video players - we'd still be trying to get basic email clients and such to work. Sorry, but programmer time is much more valuable than a few bucks for hardware upgrades.
For those of you that don't know. It removes the protection from a .m4p file (Downloaded with iTunes) . So basically you end up with a Vanilla AAC file.
Where's the RPM for "Windows Update" again?
1. Get and compile Mono (emerge mono for those of you with Gentoo). 2. In the command line, type: mcs DeDRMS.cs 3. Then type: mono DeDRMS.exe There ya go!
"Some fight for law. Some fight for justice. What will you fight for? One day, you will see."
Remember that research that found that emulating the underlying hardware with a sufficiently intelligent userland dynamic profiler was usually faster than running directly on the underlying hardware? The dynamic profiler can optimize like no compiler will ever be able to do with static analysis. It's a similar principle to what Transmeta does with their x86 emulation. Modern Just-In-Time Compilers use dynamic profiling to accelerate things, and they're getting quite good. It's certainly quite possible to design a C# vector class that's both more memory and processor efficient in most cases than C++. Here's how:
1) Record in the virtual machine/JIT every time a vector gets resized.
2) Based on the pattern of resizing, speculatively allocate for new vectors/resizes as much memory as they'll ever need, or at least as much as they'll need any time soon.
3) When you guess wrong about a speculative allocation, adjust your speculation.
C++ doubles the amount of space allocated for a vector (or queue, or list, or stack, or dequeue, or binary heap, etc) whenever a resize exceeds the amount already allocated, unless you know enough to tell it to do otherwise. This keeps the amortized cost of increasing size by one constant. C++ doesn't benefit from profiling like C# does because there's no virtual machine that can change what binary code is actually sent to the processor. You could hack vector profiling together yourself, but it would be slow. Of course, this doesn't really help C# if you're never resizing your vectors, but that doesn't mean C# can't do better than C, even if C++ will have it beat. If you've ever done much benchmarking of the C++ STL, you know that it's usually faster than otherwise identical code written with arrays, which shouldn't be possible, since the array access code can be done fairly easily in assembly without virtual function table lookups and such, but nonetheless is quite real.
The trick to this whole scheme is doing the speculation quickly and accurately. We may not be to the point yet where JIT code reliably outperforms statically compiled code in less space, but there are an army of extraordinarily intelligent grad students out there writing dissertations on the topic, and I assure you they'll make it happen.
WARNING: there is a trojan on your