deDRM de-encryption issue

Out of 18 files, around 4 or 5 didn't work for some reason. Here's the log for one of them:

calibre Debug log calibre 5.23 embedded-python: True is64bit: True macOS-10.16-x86_64-i386-64bit Darwin ('64bit', '') ('Darwin', '20.5.0', 'Darwin Kernel Version 20.5.0: Sat May 8 05:10:33 PDT 2021; root:xnu-7195.121.3~9/RELEASE_X86_64') Python 3.8.5 OSX: ('10.16', ('', '', ''), 'x86_64') Interface language: None Successfully initialized third party plugins: DeDRM (7, 2, 1) && Obok DeDRM (7, 2, 1) calibre 5.23 embedded-python: True is64bit: True macOS-10.16-x86_64-i386-64bit Darwin ('64bit', '') ('Darwin', '20.5.0', 'Darwin Kernel Version 20.5.0: Sat May 8 05:10:33 PDT 2021; root:xnu-7195.121.3~9/RELEASE_X86_64') Python 3.8.5 OSX: ('10.16', ('', '', ''), 'x86_64') Interface language: None Successfully initialized third party plugins: DeDRM (7, 2, 1) && Obok DeDRM (7, 2, 1) devicePixelRatio: 2.0 logicalDpi: 72.0 x 72.0 physicalDpi: 132.00000198244115 x 132.50000198995036 Using calibre Qt style: True [0.00] Starting up... [0.03] Showing splash screen... [0.24] splash screen shown [0.24] Initializing db... [0.24] db initialized [0.24] 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: 0.0 obok::action_err.py - loading translations [0.90] main UI initialized... [0.90] Hiding splash screen Starting QuickView DeDRM v7.2.1: Trying to decrypt The Philosophical Poetics of Alfarabi, Avicenna and Averroes.pdf DeDRM v7.2.1: The Philosophical Poetics of Alfarabi, Avicenna and Averroes.pdf is a PDF ebook DeDRM v7.2.1: Trying Encryption key default_key error writing pdf: max() arg is an empty sequence DeDRM v7.2.1: Failed to decrypt with key default_key after 0.1 seconds DeDRM v7.2.1: Looking for new default Adobe Digital Editions Keys after 0.1 seconds DeDRM v7.2.1: Trying a new default key error writing pdf: max() arg is an empty sequence DeDRM v7.2.1: Failed to decrypt with new default key after 0.1 seconds DeDRM v7.2.1: Ultimately failed to decrypt after 0.1 seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md Running file type plugin DeDRM failed with traceback: Traceback (most recent call last): File "calibre/customize/ui.py", line 176, in _run_filetype_plugins File "calibre_plugins.dedrm.init", line 640, in run decrypted_ebook = self.PDFDecrypt(path_to_ebook) File "calibre_plugins.dedrm.init", line 515, in PDFDecrypt raise DeDRMError("{0} v{1}: Ultimately failed to decrypt after {2:.1f} seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md".format(PLUGIN_NAME, PLUGIN_VERSION, time.time()-self.starttime)) calibre_plugins.dedrm.DeDRMError: DeDRM v7.2.1: Ultimately failed to decrypt after 0.1 seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md Traceback (most recent call last): File "calibre/customize/ui.py", line 433, in get_file_type_metadata File "calibre/customize/builtins.py", line 347, in get_metadata File "calibre/ebooks/metadata/pdf.py", line 126, in get_metadata ValueError: Could not read info dict from PDF Syntax Error: Couldn't find the 'EBX_HANDLER' security handler pdfinfo errored out with return code: 1 [14.04] splash screen hidden [14.04] Started up in 14.04 seconds with 13 books Added The Philosophical Poetics of Alfarabi, Avicenna and Averroes to db in: 0.0 Added 1 books in 0.6 seconds

apprenticeharper / DeDRM_tools

deDRM de-encryption issue #1773