Didn't manage to decrypt PDF. Make sure the correct password is entered in the settings.

[skyejer]

Question / bug report

Can't remove DRM using the v10.0.9. Could anyone help please?

Which version of Calibre are you running?

6.29.0

Which version of the DeDRM plugin are you running?

v10.0.9

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

No response

Log output

Paste log output here.
```Using calibre Qt style: True
calibre Debug log
calibre 6.29  embedded-python: True
macOS-11.7.10-x86_64-i386-64bit Darwin ('64bit', '')
('Darwin', '20.6.0', 'Darwin Kernel Version 20.6.0: Thu Jul  6 22:12:47 PDT 2023; root:xnu-7195.141.49.702.12~1/RELEASE_X86_64')
Python 3.10.1
OSX: ('11.7.10', ('', '', ''), 'x86_64')
Interface language: None
Successfully initialized third party plugins: DeDRM (10, 0, 9)
calibre 6.29  embedded-python: True
macOS-11.7.10-x86_64-i386-64bit Darwin ('64bit', '')
('Darwin', '20.6.0', 'Darwin Kernel Version 20.6.0: Thu Jul  6 22:12:47 PDT 2023; root:xnu-7195.141.49.702.12~1/RELEASE_X86_64')
Python 3.10.1
OSX: ('11.7.10', ('', '', ''), 'x86_64')
Interface language: None
Successfully initialized third party plugins: DeDRM (10, 0, 9)
QPA platform: cocoa
devicePixelRatio: 2.0
logicalDpi: 72.0 x 72.0
physicalDpi: 128.00000192236715 x 127.50000191485789
[0.00] Starting up...
[0.02] Showing splash screen...
[0.28] splash screen shown
[0.28] Initializing db...
[0.30] db initialized
[0.30] Constructing main UI...
[1.08] main UI initialized...
[1.08] Hiding splash screen
Starting QuickView
[7.49] splash screen hidden
[7.50] Started up in 7.50 seconds with 2 books
DeDRM v10.0.9: Trying to decrypt MAR PMP Exam Prep Study Notes 2024.pdf
DeDRM v10.0.9: Trying to decrypt NEW MAR PMP Exam Cheat Sheet 2024.pdf
DeDRM v10.0.9: MAR PMP Exam Prep Study Notes 2024.pdf is a PDF ebook with encryption Standard
DeDRM v10.0.9: Trying empty password ... exception
DeDRM v10.0.9: Exception when decrypting after 0.2 seconds
Traceback (most recent call last):
  File "calibre_plugins.dedrm.__init__", line 844, in PDFStandardDecrypt
    result = ineptpdf.decryptBook(userpassword, path_to_ebook, of.name)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 2324, in decryptBook
    serializer = PDFSerializer(inf, userkey, inept)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 2118, in __init__
    doc.initialize(userkey, inept)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1243, in initialize
    return self.initialize_standard(password, docid, param)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1525, in initialize_standard
    retval = self.check_owner_password(password, docid, param)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1316, in check_owner_password
    return self.check_owner_password_V5(password, param)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1336, in check_owner_password_V5
    if self.hash_V5(password, salt, userdata, param) == ownerdata:
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1396, in hash_V5
    E = self.process_with_aes(K[:16], True, K1, 64, K[16:32])
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1376, in process_with_aes
    aes = AES.new(key, AES.MODE_CBC, iv, False)
  File "Crypto/Cipher/AES.py", line 232, in new
  File "Crypto/Cipher/__init__.py", line 71, in _create_cipher
TypeError: Too many arguments for this mode
DeDRM v10.0.9: Didn't manage to decrypt PDF. Make sure the correct password is entered in the settings.
DeDRM v10.0.9: Finished after 0.2 seconds
DeDRM v10.0.9: NEW MAR PMP Exam Cheat Sheet 2024.pdf is a PDF ebook with encryption Standard
DeDRM v10.0.9: Trying empty password ... exception
DeDRM v10.0.9: Exception when decrypting after 0.2 seconds
Traceback (most recent call last):
  File "calibre_plugins.dedrm.__init__", line 844, in PDFStandardDecrypt
    result = ineptpdf.decryptBook(userpassword, path_to_ebook, of.name)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 2324, in decryptBook
    serializer = PDFSerializer(inf, userkey, inept)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 2118, in __init__
    doc.initialize(userkey, inept)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1243, in initialize
    return self.initialize_standard(password, docid, param)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1525, in initialize_standard
    retval = self.check_owner_password(password, docid, param)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1316, in check_owner_password
    return self.check_owner_password_V5(password, param)
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1336, in check_owner_password_V5
    if self.hash_V5(password, salt, userdata, param) == ownerdata:
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1396, in hash_V5
    E = self.process_with_aes(K[:16], True, K1, 64, K[16:32])
  File "/Users/skylar/Library/Preferences/calibre/plugins/DeDRM.zip/ineptpdf.py", line 1376, in process_with_aes
    aes = AES.new(key, AES.MODE_CBC, iv, False)
  File "Crypto/Cipher/AES.py", line 232, in new
  File "Crypto/Cipher/__init__.py", line 71, in _create_cipher
TypeError: Too many arguments for this mode
DeDRM v10.0.9: Didn't manage to decrypt PDF. Make sure the correct password is entered in the settings.
DeDRM v10.0.9: Finished after 0.2 seconds

[ElleKayEm]

Looks like it has password protection. I think you're out of luck if you don't know the password.