DeDRM failed: Failed to decrypt user key

[ThanatosDi]

Question / bug report

DeDRM google play EPUB failed. Exception is adobekey.ADEPTError: Failed to decrypt user key key (sic)

Which version of Calibre are you running?

6.25

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

ApplicationPaletteChange event ignored
Using calibre Qt style: True
ApplicationPaletteChange event received
calibre 偵錯記錄
calibre 6.25 Portable embedded-python: True
Windows-10-10.0.22621-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.22621')
Python 3.10.1
Windows: ('10', '10.0.22621', 'SP0', 'Multiprocessor Free')
Interface language: zh_TW
Successfully initialized third party plugins: DeDRM (10, 0, 3)
calibre 6.25 Portable embedded-python: True
Windows-10-10.0.22621-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.22621')
Python 3.10.1
Windows: ('10', '10.0.22621', 'SP0', 'Multiprocessor Free')
Interface language: zh_TW
Successfully initialized third party plugins: DeDRM (10, 0, 3)
QPA platform: windows
devicePixelRatio: 1.25
logicalDpi: 96.0 x 96.0
physicalDpi: 87.13433835845896 x 87.08571428571427
[0.00] Starting up...
[0.00] Showing splash screen...
[0.44] splash screen shown
[0.44] Initializing db...
[0.45] db initialized
[0.45] Constructing main UI...
[1.05] main UI initialized...
[1.05] Hiding splash screen
Starting QuickView
DeDRM v10.0.3: Trying to decrypt 不時輕聲地以俄語遮羞的鄰座艾莉同學 5.epub
DeDRM v10.0.3: Verifying zip archive integrity
DeDRM v10.0.3: 不時輕聲地以俄語遮羞的鄰座艾莉同學 5.epub is a secure Adobe Adept ePub for UUID 2a053cbe-624e-42ac-83e8-bb861fc2064d
DeDRM v10.0.3: Looking for new default Adobe Digital Editions Keys after 0.2 seconds
DeDRM v10.0.3: Exception when getting default Adobe Key after 0.2 seconds
Traceback (most recent call last):
  File "calibre_plugins.dedrm.__init__", line 591, in ePubDecrypt
  File "E:\Program\Calibre Portable\Calibre Settings\plugins\DeDRM.zip\adobekey.py", line 347, in adeptkeys
  File "E:\Program\Calibre Portable\Calibre Settings\plugins\DeDRM.zip\adobekey.py", line 327, in CryptUnprotectData
adobekey.ADEPTError: Failed to decrypt user key key (sic)
DeDRM v10.0.3: Ultimately failed to decrypt after 0.3 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\customize\ui.py", line 187, in _run_filetype_plugins
  File "calibre_plugins.dedrm.__init__", line 1067, in run
  File "calibre_plugins.dedrm.__init__", line 665, in ePubDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v10.0.3: Ultimately failed to decrypt after 0.3 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
[157.33] splash screen hidden
[157.33] Started up in 157.33 seconds with 251 books
Added 不時輕聲地以俄語遮羞的鄰座艾莉同學 5 to db in: 1.1
Added 1 books in 1.7 seconds

[ElleKayEm]

Was this book downloaded with ADE located on the same computer and user where calibre/DeDRM is installed?

[ThanatosDi]

Was this book downloaded with ADE located on the same computer and user where calibre/DeDRM is installed?

yes, then I found this issue #1938

So, I do these steps.

1. Install DeASCM
2. Use ADE and login AdobeID
3. Check control userpasswords2 username and Adobe device username at regedit, then I can't found Adobe device username at regedit
4. Use DeASCM plugin login AdobeID and export account encryption key
5. Use DeDRM plugin import the account encryption key at Adobe Digital Editions ebooks
6. Reimport epub file.
7. success

[ElleKayEm]

Thanks for reporting back with your workaround.