Imported LCPL file not decrypted

[Fabio-cyber751]

Question / bug report

Hi!
It is my first time trying to import a DRM-protected ebook in Calibre. I have installed the DeDRM plugin and customized it with the "Readium LCP" passphrase, but when I import an LCPL file I still cannot read it in Calibre.

Which version of Calibre are you running?

7.6

Which version of the DeDRM plugin are you running?

v10.0.3

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

No response

Log output

Log generated by Calibre in debug mode, when importing 2 LCPL files:

ApplicationPaletteChange event ignored
Using calibre Qt style: True
calibre_plugins.obok_dedrm.obok.obok:419: SyntaxWarning: invalid escape sequence '\s'
calibre_plugins.obok_dedrm.obok.obok:419: SyntaxWarning: invalid escape sequence '\-'
calibre_plugins.obok_dedrm.obok.obok:419: SyntaxWarning: invalid escape sequence '\s'
calibre_plugins.obok_dedrm.obok.obok:433: SyntaxWarning: invalid escape sequence '\s'
calibre_plugins.obok_dedrm.obok.obok:433: SyntaxWarning: invalid escape sequence '\s'
calibre_plugins.obok_dedrm.obok.obok:443: SyntaxWarning: invalid escape sequence '\s'
calibre_plugins.obok_dedrm.obok.obok:443: SyntaxWarning: invalid escape sequence '\s'
calibre_plugins.obok_dedrm.obok.obok:450: SyntaxWarning: invalid escape sequence '\s'
calibre_plugins.obok_dedrm.obok.obok:450: SyntaxWarning: invalid escape sequence '\s'
calibre_plugins.obok_dedrm.obok.obok:649: SyntaxWarning: invalid escape sequence '\s'
calibre Debug log
calibre 7.6  embedded-python: False
Linux-6.8.0-51-generic-x86_64-with-glibc2.39 Linux ('64bit', 'ELF')
('Linux', '6.8.0-51-generic', '#52-Ubuntu SMP PREEMPT_DYNAMIC Thu Dec  5 13:09:44 UTC 2024')
Python 3.12.3
Interface language: None
EXE path: /usr/bin/python3.12
Successfully initialized third party plugins: DeDRM (10, 0, 3) && Obok DeDRM (10, 0, 3)
calibre 7.6  embedded-python: False
Linux-6.8.0-51-generic-x86_64-with-glibc2.39 Linux ('64bit', 'ELF')
('Linux', '6.8.0-51-generic', '#52-Ubuntu SMP PREEMPT_DYNAMIC Thu Dec  5 13:09:44 UTC 2024')
Python 3.12.3
Interface language: None
EXE path: /usr/bin/python3.12
Successfully initialized third party plugins: DeDRM (10, 0, 3) && Obok DeDRM (10, 0, 3)
QPA platform: wayland
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 102.04823529411765 x 102.66947368421053
[0.00] Starting up...
[0.01] Showing splash screen...
[0.09] splash screen shown
[0.09] Initializing db...
[0.23] db initialized
[0.23] Constructing main UI...
DEBUG:    0.0 obok::utilities.py - loading translations
DEBUG:    0.0 obok::dialogs.py - loading translations
DEBUG:    0.0 obok::config.py - loading translations
DEBUG:    0.1 obok::action_err.py - loading translations
[1.40] GUI main window shown
[1.43] main UI initialized...
[1.43] Hiding splash screen
[9.91] splash screen hidden
[9.91] Started up in 9.91 seconds with 1 books
Added a6750fdb-1728-4307-af68-cad12593d1ad to db in: 1.0
Added 1 books in 1.4 seconds
Added 94fffc87-2b24-4076-91cd-77a64b4f870a to db in: 0.7
Added 1 books in 1.2 seconds

Log when trying to open an imported file in Calibre reader:

calibre, version 7.6.0
ERROR: Loading book failed: Failed to open the book at /home/fabio/Calibre Library/Unknown/94fffc87-2b24-4076-91cd-77a64b4f870a (7)/94fffc87-2b24-4076-91cd-77a64b4f870a - Unknown.lcpl. Click "Show details" for more info.

Failed to convert book: /home/fabio/Calibre Library/Unknown/94fffc87-2b24-4076-91cd-77a64b4f870a (7)/94fffc87-2b24-4076-91cd-77a64b4f870a - Unknown.lcpl with error:
Failed to run pipe worker with command: from calibre.srv.render_book import viewer_main; viewer_main()
Traceback (most recent call last):
  File "/usr/bin/calibre-parallel", line 21, in <module>
    sys.exit(main())
             ^^^^^^
  File "/usr/lib/calibre/calibre/utils/ipc/worker.py", line 196, in main
    exec(sys.argv[-1])
  File "<string>", line 1, in <module>
  File "/usr/lib/calibre/calibre/srv/render_book.py", line 952, in viewer_main
    render_for_viewer(*args)
  File "/usr/lib/calibre/calibre/srv/render_book.py", line 943, in render_for_viewer
    return render(
           ^^^^^^^
  File "/usr/lib/calibre/calibre/srv/render_book.py", line 920, in render
    book_fmt, opfpath, input_fmt = extract_book(pathtoebook, output_dir, log=default_log)
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/calibre/calibre/ebooks/oeb/iterator/book.py", line 53, in extract_book
    plumber = Plumber(pathtoebook, tdir, log, view_kepub=view_kepub)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/calibre/calibre/ebooks/conversion/plumber.py", line 755, in __init__
    raise ValueError('No plugin to handle input format: '+input_fmt)
ValueError: No plugin to handle input format: lcpl

[ElleKayEm]

No longer supported. See #18.

[Fabio-cyber751]

Sorry: I have just found out in the changelog that this feature has been removed (it would be clearer if it was not possible to enter an LCPL passphrase, by the way).