Unable to remove DRM

[BowieRas]

Question / bug report

Same error comes up for any Kindle book I try to open/convert

Which version of Calibre are you running?

7.15

Which version of the DeDRM plugin are you running?

10.0.9

If applicable, which version of the Kindle software are you running?

2.4.0

Log output

ApplicationPaletteChange event ignored
Using calibre Qt style: True
calibre Debug log
calibre 7.15  embedded-python: True
Windows-10-10.0.22631-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.22631')
Python 3.11.5
Windows: ('10', '10.0.22631', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre2\calibre-debug.exe
Successfully initialized third party plugins: DeDRM (10, 0, 9)
calibre 7.15  embedded-python: True
Windows-10-10.0.22631-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.22631')
Python 3.11.5
Windows: ('10', '10.0.22631', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre2\calibre-debug.exe
Successfully initialized third party plugins: DeDRM (10, 0, 9)
QPA platform: windows
devicePixelRatio: 1.25
logicalDpi: 96.0 x 96.0
physicalDpi: 137.37464788732393 x 137.6169312169312
[0.00] Starting up...
[0.00] Showing splash screen...
[0.20] splash screen shown
[0.20] Initializing db...
[0.22] db initialized
[0.22] Constructing main UI...
[0.53] GUI main window shown
[0.64] main UI initialized...
[0.64] Hiding splash screen
[5.31] splash screen hidden
[5.31] Started up in 5.31 seconds with 1 books
stdout+stderr from file dialog helper: [b'', b'']
piped data from file dialog helper: [b".\xf7\x94&&\x87\xe5#\x0fMp\x0c\x17\xa1\xaa\xe2hK ;\x80(\xadmA\xa1 \xad\xdd'c\x15", b'C:\\Users\\Bowie\\Documents\\My Kindle Content\\B09Y95BP6W_EBOK\\B09Y95BP6W_EBOK.azw', b'C:\\Users\\Bowie\\Documents\\My Kindle Content\\B09Y95BP6W_EBOK\\CR!QAQHA2MYT16YDCCTZAD3W1WJC5HJ.azw.md']
DeDRM v10.0.9: Trying to decrypt B09Y95BP6W_EBOK.azw
DeDRM v10.0.9: Failed to decrypt with error: The .kfx DRMION file cannot be decrypted by itself. A .kfx-zip archive containing a DRM voucher is required.
DeDRM v10.0.9: Looking for new default Kindle Key after 0.9 seconds
searching for kinfoFiles in C:\Users\Bowie\AppData\Local
Found K4PC 1.25+ kinf2018 file: C:\Users\Bowie\AppData\Local\Amazon\Kindle\storage\.kinf2018
Decrypted key file using IDString '1995080121' and UserName 'Bowie'
DeDRM v10.0.9: Found 1 new key
Traceback (most recent call last):
  File "calibre_plugins.dedrm.__init__", line 931, in KindleMobiDecrypt
  File "C:\Users\Bowie\AppData\Roaming\calibre\plugins\DeDRM.zip\k4mobidedrm.py", line 170, in GetDecryptedBook
k4mobidedrm.DrmException: The .kfx DRMION file cannot be decrypted by itself. A .kfx-zip archive containing a DRM voucher is required.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "calibre_plugins.dedrm.__init__", line 965, in KindleMobiDecrypt
  File "C:\Users\Bowie\AppData\Roaming\calibre\plugins\DeDRM.zip\k4mobidedrm.py", line 170, in GetDecryptedBook
k4mobidedrm.DrmException: The .kfx DRMION file cannot be decrypted by itself. A .kfx-zip archive containing a DRM voucher is required.
DeDRM v10.0.9: Ultimately failed to decrypt after 1.2 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
  File "calibre_plugins.dedrm.__init__", line 931, in KindleMobiDecrypt
  File "C:\Users\Bowie\AppData\Roaming\calibre\plugins\DeDRM.zip\k4mobidedrm.py", line 170, in GetDecryptedBook
k4mobidedrm.DrmException: The .kfx DRMION file cannot be decrypted by itself. A .kfx-zip archive containing a DRM voucher is required.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "calibre\customize\ui.py", line 199, in _run_filetype_plugins
  File "calibre_plugins.dedrm.__init__", line 1030, in run
  File "calibre_plugins.dedrm.__init__", line 981, in KindleMobiDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.9: Ultimately failed to decrypt after 1.2 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Traceback (most recent call last):
  File "calibre\customize\ui.py", line 481, in get_file_type_metadata
  File "calibre\customize\builtins.py", line 267, in get_metadata
  File "calibre\ebooks\metadata\mobi.py", line 502, in get_metadata
  File "calibre\ebooks\mobi\reader\headers.py", line 295, in __init__
  File "calibre\ebooks\mobi\reader\headers.py", line 323, in identity
calibre.ebooks.mobi.MobiError: Unknown book type: b'\x81\xc4\xde\x02\x9d\x8c#\x01'

[j-howell]

You need the KFX Input plugin.