Problem with proquest book DRM not being removed

[hhpicker]

Hi there,

Attempted to use Calibre to remove DRM on an Adobe Digital Editions encrypted file - have done this many times before with no issue. The book in question is from ProQuest, also have de-DRMed many books from them in the past with no issue. I tried both a pdf and an epub of the book, neither of which worked. Attached is the encrypted pdf file gotten after putting the acsm through ADE, although I only have the loan for a day - can try again also for a longer loan if that would be helpful. Both worked totally fine within ADE. I ran Calibre in debug mode to get the log as instructed in the ReadMe, which is as follows:

calibre Debug log calibre 5.34 embedded-python: True is64bit: False Windows-10-10.0.19041 Windows ('32bit', 'WindowsPE') 32bit process running on 64bit windows ('Windows', '10', '10.0.19041') Python 3.8.5 Windows: ('10', '10.0.19041', '', 'Multiprocessor Free') Interface language: None Successfully initialized third party plugins: DeDRM (7, 2, 1) calibre 5.34 embedded-python: True is64bit: False Windows-10-10.0.19041 Windows ('32bit', 'WindowsPE') 32bit process running on 64bit windows ('Windows', '10', '10.0.19041') Python 3.8.5 Windows: ('10', '10.0.19041', '', 'Multiprocessor Free') Interface language: None Successfully initialized third party plugins: DeDRM (7, 2, 1) Turning on automatic hidpi scaling devicePixelRatio: 1.0 logicalDpi: 96.0 x 96.0 physicalDpi: 81.55183946488295 x 81.64285714285714 Using calibre Qt style: True [0.00] Starting up... [0.02] Showing splash screen... [0.58] splash screen shown [0.58] Initializing db... [0.58] db initialized [0.58] Constructing main UI... [1.09] main UI initialized... [1.09] Hiding splash screen Starting QuickView [16.52] splash screen hidden [16.52] Started up in 16.52 seconds with 8 books Added 422896 to db in: 0.2 Added 1 books in 0.4 seconds DeDRM v7.2.1: Trying to decrypt A Brief History of Neoliberalism.pdf DeDRM v7.2.1: A Brief History of Neoliberalism.pdf is a PDF ebook DeDRM v7.2.1: Trying Encryption key default_key DeDRM v7.2.1: Exception when decrypting after 0.2 seconds Traceback (most recent call last): File "calibre_plugins.dedrm.init", line 436, in PDFDecrypt File "calibre_plugins.dedrm.ineptpdf", line 2178, in decryptBook File "calibre_plugins.dedrm.ineptpdf", line 1984, in init File "calibre_plugins.dedrm.ineptpdf", line 1469, in initialize File "calibre_plugins.dedrm.ineptpdf", line 1599, in initialize_ebx File "calibre_plugins.dedrm.ineptpdf", line 390, in decrypt File "Crypto\Cipher\PKCS1_v1_5.py", line 165, in decrypt ValueError: Ciphertext with incorrect length. DeDRM v7.2.1: Failed to decrypt with key default_key after 0.2 seconds DeDRM v7.2.1: Looking for new default Adobe Digital Editions Keys after 0.2 seconds Found 1 keys DeDRM v7.2.1: Trying a new default key DeDRM v7.2.1: Exception when decrypting after 0.4 seconds Traceback (most recent call last): File "calibre_plugins.dedrm.init", line 487, in PDFDecrypt File "calibre_plugins.dedrm.ineptpdf", line 2178, in decryptBook File "calibre_plugins.dedrm.ineptpdf", line 1984, in init File "calibre_plugins.dedrm.ineptpdf", line 1469, in initialize File "calibre_plugins.dedrm.ineptpdf", line 1599, in initialize_ebx File "calibre_plugins.dedrm.ineptpdf", line 390, in decrypt File "Crypto\Cipher\PKCS1_v1_5.py", line 165, in decrypt ValueError: Ciphertext with incorrect length. DeDRM v7.2.1: Failed to decrypt with new default key after 0.4 seconds DeDRM v7.2.1: Ultimately failed to decrypt after 0.4 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 175, in _run_filetype_plugins File "calibre_plugins.dedrm.init", line 640, in run File "calibre_plugins.dedrm.init", line 515, in PDFDecrypt calibre_plugins.dedrm.DeDRMError: DeDRM v7.2.1: Ultimately failed to decrypt after 0.4 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 432, in get_file_type_metadata File "calibre\customize\builtins.py", line 318, in get_metadata File "calibre\ebooks\metadata\pdf.py", line 124, 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 Exception ignored in: <function NativeFunction.del at 0x07070970> Traceback (most recent call last): File "calibre_plugins.dedrm.adobekey", line 268, in del TypeError: 'NoneType' object is not callable Exception ignored in: <function NativeFunction.del at 0x07070970> Traceback (most recent call last): File "calibre_plugins.dedrm.adobekey", line 268, in del TypeError: 'NoneType' object is not callable stdout+stderr from file dialog helper: [b'', b''] piped data from file dialog helper: [b'E#\x80\xe77\xa8\xd5\xfa\xbf\xabCn\xf97\x88\xf0\xfc\xd6}\xb0r\xe0\xe9\DT\x16\xf0(\x16\xe6#', b'C:\Users\Holly\Documents\My Digital Editions\A Brief History of Neoliberalism.pdf'] Added A Brief History of Neoliberalism to db in: 0.2 Added 1 books in 1.0 seconds

Any ideas would be great, thank you!

A Brief History of Neoliberalism.pdf

[ElleKayEm]

These tools are intended for purchased books.

[j-howell]

That book has Adobe's hardened DRM. Even if it wasn't a loan these tools would not able able to do anything with it.