DeDRM 10.0.9 not working for KFX-ZIP format book downloaded from Kindle for PC 1.26 in Wine

[rytrot]

DeDRM 10.0.9 not working for KFX-ZIP format book downloaded from Kindle for PC 1.26 in Wine

[ElleKayEm]

Unable to find python3 executable in WINEPREFIX=""

DeDRM isn't able to run the Kindle key retrieval script under Wine. I don't know if this is something that needs to be fixed in DeDRM or if it would work if only you had the right versions of Python and Pycrytodome or what-have-you installed under Wine.

You wouldn't have to worry about Python etc if you install Windows calibre under Wine -- the scripts can use calibre's built in Python. But you probably need an older version of calibre to get it to install.

First, since this is an older book and you can download it with an older version of Kindle for PC, I'd suggest avoiding the KFX format. See the methods under the spoiler in this post: https://www.mobileread.com/forums/showthread.php?t=283371

[ElleKayEm]

(Didn't mean to hit post yet)

Then you could install Windows calibre 4.23 and load DeDRM 6.8.1 which would work with a non-kfx format copy of the book. (DeDRM 10.0.9 is suppose to be compatible with previous versions of calibre, but DeDRM 6.8.1 definitely is.) If you can successfully decrypt your book there, then you could save the key from Windows calibre/DeDRM and import it into your Linux calibre/DeDRM setup. Then you could decrypt future downloads from that Kindle for PC installation with Linux calibre/DeDRM.

[rytrot]

Thanks for the reply.

Installing windows calibre using wine is not working. I'm running wine msiexec /i calibre-64bit-4.23.0.msi but the installer is ending prematurely. Is there any way to get this working or do I need to use a windows PC?

[ElleKayEm]

I haven't tried it myself (no Linux), but I've seen others say they were able to. If you have access to a Windows machine, that would definitely be easier.

[Geremia]

@rytrot
I had a similar, No installed Python found! issue, which was fixed by checking the "py launcher" box when installing Python. (I installed the latest python-3.12.4-amd64.exe.) In my case, it looked for the Python executable at C:\\users\\geremia\\AppData\\Local\\Programs\\Python\\Launcher\\py.exe.

I had to run wine pip install pycryptodome, too.

Then it can successfully import "Kindle for Mac and PC Keys" from within Calibre, in the DeDRM "Customize plugin" dialog box.

Then you can import KFX *.azw files, DeDRM should decrypt them, and the Calibre KFX Conversion Input Plugin can convert KFX-ZIP to a KFX.

I'm using:

• Wine 9.10
• Slackware64-current Linux
• 64-bit–only WINEPREFIX
• KindleForPC-installer-1.40.65535.exe (which avoids the "KRFDynamic.dll failed to initialize" issue and is late enough a version to download newer KFX format e-books (so I doesn't give a popup saying you need to install a WINE-incompatible version of Kindle for PC).
  _{🎩-tip: "Kindle のインストール"}