MobiDeDRM.py - remove DRM from Mobipocket ebooks (unDRM MOBI and PRC files)

Originally Posted by waleng

I'm having a bit of a problem here. Is anyone of you having errors removing the DRM from your purchased books after the latest Kindle Software Update? I had no problems cracking the books that I bought before updating to 2.5.2 but had a hard time with the later ones. I think Amazon has decided to change their codes. Do you guys have a workaround for this?

Any book downloaded after 2.5.2, even those bought before and downloaded from Manage Your Kindle, will not work with Mobidedrm.

You can try to downgrade Kindle4PC and re-download your books. Alternatively you can remove DRM using Skindle.

[mchassy]

Just hopping on to this thread. I have a Kindle 2, I use Mac, and I am trying to dedrm my kindle books. I've had my Kindle since November. I just installed Calibre on my Mac and then re downloaded all of my books from Manage Your Kindle.
I imported all of them into the Calibre library. No problem.

Now I would like to dedrm them in to normal mobi format and add those versions to my Calibre library as well. I tried to add the mobidedrm_plugin.py (in a zip) file as an addin, but Calibre did not seem to accept it.
I didn't want to spend too much time on this, and I know scripting fairly well, so I copied all my AZW files into a folder along with the mobidedrm.py file.
I wrote a .sh file with a line for each book in the following format:

python mobidedrm.py "Book.azw" "Book.mobi" 'MYPID'

I used the double quotes around the book names, because they often have spaces.

I got these messages for all of my books:

Extra Data Flags = 2
Error: no key found. maybe the PID is incorrect

I read through all of this thread:

• One messages says to use the V.06 of the script - but that version is not published in the thread :-(
• Then I found this on the last message on the thread.
  

  Any book downloaded after 2.5.2, even those bought before and downloaded from Manage Your Kindle, will not work with Mobidedrm.

• What are you referring to as 2.5.2? Is the DRM version? Does that mean that this script is not working on the latest version of DRM that Amazon has put into place?
• You mention the Skindle tool afterwards, but that is only for PC. Is there an equivalent for Mac?

Thanks for any info.

Mark

Originally Posted by mchassy

What are you referring to as 2.5.2? Is the DRM version?

This is a version of Kindle Software (this was mentioned above)

Originally Posted by mchassy

One messages says to use the V.06 of the script - but that version is not published in the thread :-(

You should always try the latest version first.
v.0.13 was posted above before

http://mobi.pastebin.com/k0Hxg6iY

[Trester]

Originally Posted by Stream Recorder

You should always try the latest version first.
v.0.13 was posted above before

http://mobi.pastebin.com/k0Hxg6iY

I've spent a lot of time on this, and I still can't get it to work. I've downloaded/saved v.0.13 to a py file. In the CMD window I type:

MobideDRM.py blood.prc blood2.prc XNXNNXX$XX

and get the following error message:
File "C:\Python31\MobideDRM.py", line 57
print "bad key length!"

Line 56 says: if len(key)!=16: (if fail goto 57)

The PID is from Mobipocket Reader (v 6.2 Build 608). I am also concerned that the PID contains a "$" character, which seems as though it would fail the script logic.

I have also tried using single quotation marks on the PID, with no success.

Any help would be appreciated!

[mchassy]

@Steam Recorder
Yes I saw you were referring to the kindle software afterward.
For the script : tried both the v.0.06 and the v.0.13 and both fail in the same way.
I think your suggestion to try using the MobiPocket Reader is the key.
I will check on that and get back to you.

Originally Posted by Trester

I've spent a lot of time on this, and I still can't get it to work. I've downloaded/saved v.0.13 to a py file. In the CMD window I type:

MobideDRM.py blood.prc blood2.prc R7X46LB$DV

and get the following error message:
File "C:\Python31\MobideDRM.py", line 57
print "bad key length!"

Line 56 says: if len(key)!=16: (if fail goto 57)

Try to take the last two digits off the PID, cutting it from 10 symbols to 8.

Originally Posted by Trester

I have also tried using single quotation marks on the PID, with no success.

It is a good idea to make sure your filenames doesn't contain spaces.

Instead of

MobideDRM.py file name with spaces.prc file name with spaces2.prc PID

use

MobideDRM.py "file name with spaces.prc" "file name with spaces2.prc" PID

or rename your files and use

MobideDRM.py file_name_with_spaces.prc file_name_with_spaces2.prc PID

[mchassy]

@Stream Recorder
Ok, I went back and looked at the beginning of this post.
Are you saying that I have one PID *from Amazon* and another when I import my AZW file into Calibre?
In either case, is it possible to view the PID using Calibre (or some other tool) to verify that I'm using the correct one? I got mine from the website which generates it (http://kindletools.prestonlee.com/).

[Dan247]

Any idea when MobiDeDRM might be upgraded to handle the 2.5.2 Kindle software release? I too am getting the "no key found maybe the pid is incorrect" error message when I try to run it, no matter which version of MobiDeDRM I try.

Originally Posted by mchassy

@Stream Recorder
Ok, I went back and looked at the beginning of this post.
Are you saying that I have one PID *from Amazon* and another when I import my AZW file into Calibre?

http://stream-recorder.com/forum/sho...67&postcount=2