Cannot get DeDRM to work - Wrong key?

[imbrogliio]

Hello, I'm very new to all of this so unsure if I've done anything wrong.

I am using version 5 of Calibre and version 7.2.1 of DeDRM. I am following this guide: https://github.com/apprenticeharper/DeDRM_tools/wiki/Exactly-how-to-remove-DRM.

I am trying to convert KFX files from my Kindle Gen 7 to something readable on Calibre. I have my kindle plugged into my PC and import books directly. When I import them, the covers, titles and author details come up just fine, but the file type is KFX.ZIP and I get the usual DRM message when trying to view the book using the internal reader.

Here is a copy of the command terminal in debug mode:
stdout+stderr from file dialog helper: [b'', b'']
piped data from file dialog helper: [b'\x8c\xf1"-\xdd@C\xe3\xa7Q\xd2\xcd9Jg/0\x12\x98\xcd\xc2\xd4\r\xfcl\xe5\xe5\xdc\xf7\xd3P\x18', b'E:\documents\Harrow the Ninth (The Locked Tomb Series Book 2)_B07WYSGHC7.kfx']
Gather KFX-ZIP (from KFX Input) 2.27.1: Importing E:\documents\Harrow the Ninth (The Locked Tomb Series Book 2)_B07WYSGHC7.kfx
Gather KFX-ZIP (from KFX Input): Gathered 4 file(s) as C:\Users\jcros\AppData\Local\Temp\calibre_98dlhv18\2c1boxhm.kfx-zip
DeDRM v7.2.1: Trying to decrypt 2c1boxhm.kfx-zip
Using Library AlfCrypto DLL/DYLIB/SO
Using Library AlfCrypto DLL/DYLIB/SO
Decrypting KFX-ZIP ebook: 2c1boxhm
Found 0 keys to try after 0.1 seconds
Decrypting KFX DRM voucher: voucher
Traceback (most recent call last):
File "calibre_plugins.dedrm.kfxdedrm", line 83, in decrypt_voucher
File "C:\Users\jcros\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py", line 879, in decryptvoucher
File "C:\Users\jcros\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py", line 758, in pkcs7unpad
File "C:\Users\jcros\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py", line 98, in _assert
Exception: Incorrect padding - Wrong key
DeDRM v7.2.1: Failed to decrypt with error: Failed to decrypt KFX DRM voucher with any key
DeDRM v7.2.1: Looking for new default Kindle Key after 0.1 seconds
searching for kinfoFiles in C:\Users\jcros\AppData\Local
No K4PC kindle.info/kinf/kinf2011 files have been found.
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
Package KFX (from KFX Input) 2.27.1: Packaging C:\Users\jcros\AppData\Local\Temp\calibre_98dlhv18\2c1boxhm.kfx-zip
Processing container: CR!41M0GM3GJH7MQ04GBRN46Q7RRZN4.kfx
Processing container: Harrow the Ninth (The Locked Tomb Series Book 2)_B07WYSGHC7.kfx
KFX metadata reader (from KFX Input) activated for C:\Users\jcros\AppData\Local\Temp\calibre_98dlhv18\o2sp702a_add_books\0\Harrow the Ninth (The Locked Tomb Series Book 2)_B07WYSGHC7.kfx-zip
Added Harrow the Ninth: 2 (The Locked Tomb Series) to db in: 0.2
Added 1 books in 2.2 seconds
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
File "calibre_plugins.dedrm.init", line 540, in KindleMobiDecrypt
File "calibre_plugins.dedrm.k4mobidedrm", line 238, in GetDecryptedBook
File "calibre_plugins.dedrm.kfxdedrm", line 45, in processBook
File "calibre_plugins.dedrm.kfxdedrm", line 89, in decrypt_voucher
Exception: Failed to decrypt KFX DRM voucher with any key

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\customize\ui.py", line 175, in _run_filetype_plugins
File "calibre_plugins.dedrm.init", line 633, in run
File "calibre_plugins.dedrm.init", line 583, in KindleMobiDecrypt
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
Running file type plugin Package KFX (from KFX Input) failed with traceback:
Traceback (most recent call last):
File "calibre\customize\ui.py", line 175, in _run_filetype_plugins
File "calibre_plugins.kfx_input.package_filetype", line 23, in run
File "calibre_plugins.kfx_input.package_filetype", line 34, in package_kfx
File "calibre_plugins.kfx_input.kfxlib.yj_book", line 79, in convert_to_single_kfx
File "calibre_plugins.kfx_input.kfxlib.yj_book", line 213, in decode_book
File "calibre_plugins.kfx_input.kfxlib.yj_book", line 331, in get_container
calibre_plugins.kfx_input.kfxlib.utilities.KFXDRMError: Book container Harrow the Ninth (The Locked Tomb Series Book 2)_B07WYSGHC7.kfx has DRM and cannot be converted
Worker Launch took: 0.03 seconds

I keep seeing 'wrong key', 'incorrect key', '0 keys found' ect. I am unsure how to fix this issue. I would be very grateful for any advice anyone has.

[ElleKayEm]

This repo is no longer maintained. Update to noDRM's DeDRM 10.0.9: https://github.com/noDRM/DeDRM_tools/releases

Also enter your Kindle's serial number into the Kindle eInk ebooks section of DeDRM's customization.

[imbrogliio]

Thanks for your response. I've changed to v.10.0.9 and added my serial number, I'm still getting the standard DRM message when I try to view a book.

stdout+stderr from file dialog helper: [b'', b'']
piped data from file dialog helper: [b'=\xf0\xa9g\xa7\x89\x89J#\xfa\xa5\xc7\x8c1\x82\t\xe1\xb4\x1fq\5\x051f7?\xafd\x8b\x7f\xcd', b'E:\documents\Wintersmith_ (Discworld Novel 35) (Discworld series)B0038AUYTQ.kfx']
Gather KFX-ZIP (from KFX Input) 2.27.1: Importing E:\documents\Wintersmith (Discworld Novel 35) (Discworld series)B0038AUYTQ.kfx
Gather KFX-ZIP (from KFX Input): Gathered 4 file(s) as C:\Users\jcros\AppData\Local\Temp\calibre_gtm3rtjo\i1z6417u.kfx-zip
DeDRM v10.0.9: Trying to decrypt i1z6417u.kfx-zip
Decrypting KFX-ZIP ebook: i1z6417u
Found 0 keys to try after 0.7 seconds
Decrypting KFX DRM voucher: voucher
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Traceback (most recent call last):
File "C:\Users\jcros\AppData\Roaming\calibre\plugins\DeDRM.zip\kfxdedrm.py", line 105, in decrypt_voucher
File "C:\Users\jcros\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py", line 1368, in decryptvoucher
UnboundLocalError: local variable 'ex' referenced before assignment
DeDRM v10.0.9: Failed to decrypt with error: Failed to decrypt KFX DRM voucher with any key
DeDRM v10.0.9: Looking for new default Kindle Key after 0.8 seconds
searching for kinfoFiles in C:\Users\jcros\AppData\Local
No K4PC kindle.info/kinf/kinf2011 files have been found.
DeDRM v10.0.9: Ultimately failed to decrypt after 0.8 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md
Package KFX (from KFX Input) 2.27.1: Packaging C:\Users\jcros\AppData\Local\Temp\calibre_gtm3rtjo\i1z6417u.kfx-zip
Processing container: CR!H3779MS34X1TD4HYFCB6MPZWAZ8J.kfx
Processing container: Wintersmith (Discworld Novel 35) (Discworld series)B0038AUYTQ.kfx
KFX metadata reader (from KFX Input) activated for C:\Users\jcros\AppData\Local\Temp\calibre_gtm3rtjo\8_0xtwco_add_books\0\Wintersmith (Discworld Novel 35) (Discworld series)_B0038AUYTQ.kfx-zip
Added Wintersmith: (Discworld Novel 35) (Discworld series) to db in: 0.2
Added 1 books in 2.3 seconds

[ElleKayEm]

Still showing that there isn't any key to try. Copy and paste your serial number from the website into DeDRM's customization. Be sure to click ok and apply on your way back out of the dialog boxes. Then restart calibre before re-adding your book.

[imbrogliio]

It worked! Hooray! Thank you so much for your help!!