How to remove DRM from sony ebooks (BBeB and EPUB) with ineptkey.pyw, inepepub.pyw
It is possible to remove DRM protection from EPUB files using free python scripts:
Circumventing Adobe ADEPT (Adobe Digital Experience Protection Technology) DRM for EPUB:
Quote:
| By way of a concrete reverse-engineering contribution, I have successfully circumvented Adobe's ADEPT DRM scheme for EPUB files. The same circumvention probably also allows decryption of ADEPT-encrypted PDF files, although I haven't looked into it yet. ADEPT is pretty close to faultless as a crypto system -- a per-user RSA key encrypts a per-book AES key which encrypts the content. It uses AES in CBC mode with a random IV. It uses RSA with PKCS#1 v1.5 padding, which is perfectly adequate for this case. Unfortunately for Adobe, this isn't a crypto system, but a DRM system. DRM systems ultimately depend not on the strength of their cryptography, but the complexity of their obfuscation. There is very little obfuscation in how Adobe Digital Editions hides and encrypts the per-user RSA key, allowing fairly simple duplication of exactly the same process Digital Editions uses to retrieve it. In practical terms, this breaks ADEPT circumvention into two components: key retrieval and decryption. Key retrieval depends only on the details of Digital Editions and can change seamlessly with an update to the same. Decryption however is a property of the architecture of the system as a whole. Preventing circumventing decryption with previously retrieved keys would require changes to both DE and Adobe Content Server and would take quite some time to propagate to all ACS customers. The upshot being that if you want to decrypt ADEPT books in the future, grab your key now -- no garauntees that you'll be able to do so in the future, but a previously-retrieved key should keep on working. Here are the scripts: Key-retrieval script (ineptkey.pyw version 3) and Decryption script (ineptepub.pyw version 2): Code:
http://pastebin.com/f26972321 http://pastebin.com/f28fdd6b3
And on a preachy note, please don't be a jerk with these. DRM is bad, but piracy is wrong kids, and only validates the opinions of those who think they need DRM in the first place. |
- Install Adobe Flash Player
Code:http://get.adobe.com/flashplayer/
- Install Adobe Digital Editions (ADE)
Code:http://www.adobe.com/products/digitaleditions/
- Authorize your copy of Adobe Digital Editions.
- Install Python
- Install PyCrypto
- Download ineptkey.pyw and ineptepub.pyw and put them into one directory.
- Run ineptkey.pyw. It will find the key and write it to hard disk as "ADEPTKEY.DER " in the same directory where ineptkey.pyw is.
- Run ineptepub.pyw
A dialog windows with three parameters will pop up :- Key file ADEPTKEY.DER (filled automatically if the ADEPTKEY.DER-file and ineptepub.pyw reside in the same directory)
If not, click on the "…" button and select a file. - Input file
Click on the "…" button to choose your EPUB ebook. You'll find it in "My Documents\My Digital Editions".
If you just can't find the EPUB ebook, open Adobe Digital Editions and find the path in the properties of the ebook. - Output file
Click on the "…" and enter a filename.
- Key file ADEPTKEY.DER (filled automatically if the ADEPTKEY.DER-file and ineptepub.pyw reside in the same directory)
- Open your newly created DRM-free EPUB file with your favorite application (on whatever device you like)
Download Key-retrieval script
ineptkey.pyw version 5:
Code:
http://pastie.org/1030386
Code:
http://pastebin.com/f6ffa029
Download ineptepub.pyw:
ineptepub.pyw version 5.2
Code:
http://pastie.org/1032773
Code:
http://wiki.xkyle.com/Epub_Decrypter
Code:
http://pastebin.com/f4a7c338a
See also:
ebook DRM removal tools archive
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