Version 7.2.1 released on 11 April, 2021
Welcome to Apprentice Alf’s blog
This blog is intended to help anyone looking for free and simple software for removing DRM from their Kindle ebooks, stripping DRM from their Adobe Digital Editions ebooks, getting rid of DRM from their Barnes and Noble ebooks, freeing their Kobo ebooks of DRM, or decrypting their Fictionwise eReader ebooks.
If you want to find out more about ebooks, DRM and why you will probably want to remove the DRM from your ebooks, see this post: Ebook Formats, DRM and You — A Guide for the Perplexed.
If you already know that you want to strip the DRM from your ebooks, you’ve found the right place.
The Tools
To get started on removing DRM from your ebooks, just download the tools archive from the link below. Unzip the archive, and start reading.
The latest release can be found at the top of this page:
https://github.com/apprenticeharper/DeDRM_tools/releases
Getting Help with the Tools
If you have any questions about the tools, ebooks, and DRM, check the FAQs at the GitHub repository:
https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md
If you have any problems with the current tools, please ask for help in a comment on this post or in the Discussions area of Apprentice Harper’s GitHub repository. If you would like to report a bug, please open a new issue at the GitHub repository. If you are having a problem with an older version of the tools, please first update to the current version, and see if that solves your problem.
Before commenting here, please check the ReadMe file and the FAQs (see link above).
In any bug report or help request, please include:
- which tool was used
- which OS you are using
- where the ebook file came from (device or application)
- any error messages
- a log of the DRM-removal attempt (see the FAQs on how to get a log).
Anti-Piracy Notice
Please only use these tools for gaining full access to your own ebooks for archiving/conversion/convenience. De-drmed ebooks should not be uploaded to open servers, torrents, or other methods of mass distribution. No help will be given to people doing such things. Authors, retailers and publishers all need to make a living, so that they can continue to produce books for us to read. Don’t be a parasite.
Origin of the Tools
The tools for removing DRM from ePubs were originally posted at i♥cabbages’ blog. The tools for Kindle/Mobipocket were originally posted at The Dark Reverser’s blog.
They have since been improved by many people, but mostly some_updates, DiapDealer, Apprentice Alf, and Apprentice Harper. While there are many sites that redistribute these tools, the most up-to-date versions of the tools are currently released here.
Other Sources
Anyone trying to sell you ebook DRM removal tools for Adobe Adept ePub and PDFs, Barnes & Noble ePubs, Kindle ebooks, Kobo ebooks, or eReader ebooks has probably just repackaged (an earlier) version of the tools available here.
tried 4.23 and 5 calibre with plugns , started on 4/29/21 on not working…get this message
calibre, version 4.23.0
ERROR: KFX conversion failed:
Cannot convert Advance by Bounds (Alaskan Security-Team Rogue Book 6)Exception(u’Unexpected Ion symbols used: $789\nsection cK1, $269 1611, story lK5, $269 1690 content type $269 has extra data: ($789: $353)\nsection cZA, $269 1998, story lZE, $269 2141 content type $269 has extra data: ($789: $353)\nsection c1X8, $269 2941, story l1XC, $269 2984 content type $269 has extra data: ($789: $353)\nsection c2JA, $269 3603, story l2JE, $269 3780 content type $269 has extra data: ($789: $353)\nsection c3DG, $269 4458, story l3DM, $269 4552 content type $269 has extra data: ($789: $353)\nsection c40W, $269 5066, story l410, $269 5169 content type $269 has extra data: ($789: $353)\nsection c4C9, $269 5422, story l4CD, $269 5536 content type $269 has extra data: ($789: $353)’,)
has happened on 2 books so far from amozon kfx
You can fix that error by updating to the latest version of the KFX Input plugin.
It sounds like the DRM has been removed, but the conversion from KFX format has failed. I’d use one of the methods of getting non-KFX format.
Hi,
Obok plugin removes DRM for a book but the content is not readble.
Below is the log file:
calibre Hata ayıklama logu
calibre 5.17 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.18362 Windows (’64bit’, ‘WindowsPE’)
(‘Windows’, ’10’, ‘10.0.18362’)
Python 3.8.5
Windows: (’10’, ‘10.0.18362’, ”, ‘Multiprocessor Free’)
Interface language: tr
Failed to initialize plugin: ‘C:\Users\faruk\AppData\Roaming\calibre\plugins\DeDRM.zip’
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 39, 0) && Package KFX (from KFX Input) (1, 39, 0) && KFX metadata reader (from KFX Input) (1, 39, 0) && KFX Input (1, 39, 0) && Obok DeDRM (7, 2, 1)
calibre 5.17 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.18362 Windows (’64bit’, ‘WindowsPE’)
(‘Windows’, ’10’, ‘10.0.18362’)
Python 3.8.5
Windows: (’10’, ‘10.0.18362’, ”, ‘Multiprocessor Free’)
Interface language: tr
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 39, 0) && Package KFX (from KFX Input) (1, 39, 0) && KFX metadata reader (from KFX Input) (1, 39, 0) && KFX Input (1, 39, 0) && Obok DeDRM (7, 2, 1)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 166.4436860068259 x 166.25454545454545
Using calibre Qt style: True
[0.00] Starting up…
[0.00] Showing splash screen…
[0.81] splash screen shown
[0.81] Initializing db…
[0.83] db initialized
[0.83] 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
[1.73] main UI initialized…
[1.73] Hiding splash screen
Starting QuickView
Traceback (most recent call last):
File “calibre\customize\ui.py”, line 741, in initialize_plugins
File “calibre\customize\ui.py”, line 65, in load_plugin
File “calibre\customize\zipplugin.py”, line 293, in load
File “importlib__init__.py”, line 127, in import_module
File “”, line 1014, in _gcd_import
File “”, line 991, in _find_and_load
File “”, line 975, in _find_and_load_unlocked
File “”, line 671, in _load_unlocked
File “calibre\customize\zipplugin.py”, line 185, in exec_module
File “calibre\customize\zipplugin.py”, line 181, in get_code
File “calibre_plugins.dedrm.init“, line 164
print u”{0} v{1}: Copying needed library files from plugin’s zip”.format(PLUGIN_NAME, PLUGIN_VERSION)
^
SyntaxError: invalid syntax
Traceback (most recent call last):
File “calibre\db\cache.py”, line 1417, in set_metadata
File “calibre\db\cache.py”, line 1340, in set_cover
File “calibre\db\backend.py”, line 1515, in set_cover
File “calibre\utils\img.py”, line 288, in save_cover_data_to
File “calibre\utils\img.py”, line 196, in image_to_data
ValueError: Failed to export image as JPEG with error: Image is empty
Traceback (most recent call last):
File “calibre\db\cache.py”, line 1417, in set_metadata
File “calibre\db\cache.py”, line 1340, in set_cover
File “calibre\db\backend.py”, line 1515, in set_cover
File “calibre\utils\img.py”, line 288, in save_cover_data_to
File “calibre\utils\img.py”, line 196, in image_to_data
ValueError: Failed to export image as JPEG with error: Image is empty
[7.34] splash screen hidden
[7.34] Started up in 7.34 seconds with 109 books
Running Obok DeDRM v7.2.1
DEBUG: 10.4 didn’t find device
Obok v4.0.0
Copyright © 2012-2020 Physisticated et al.
C:\Users\faruk\AppData\Local\Temp\tmp5pi26p02
DEBUG: 10.5 got kobodir C:\Users\faruk\AppData\Local\Kobo\Kobo Desktop Edition
Found 12 possible keys to try.
DEBUG: 16.1 BookListTableWidget:get_books – book_num: 1
DEBUG: 16.1 BookListTableWidget:get_books – book: Dünyanın Merkezine Yolculuk
DEBUG: 16.1 InterfacePluginAction::launchObok – number of books to decrypt: 1
Obok DeDRM v7.2.1 – Decrypting Dünyanın Merkezine Yolculuk
Trying key: b’83be46ace68f0f9187df0d4a327750d8′
Checking text:b’)\xda\xbe\xdc\xbcQ\xaans\xbb’:
Perhaps utf-8 without BOM
Bad character at 1, value 218
Decryption failed, trying next key.
Trying key: b’7412c544bf3ab93b686a1ddcdbbeca24′
Checking text:b'[\xf3\x14t|\xfd9\xb0<5′:
Perhaps utf-8 without BOM
Bad character at 1, value 243
Decryption failed, trying next key.
Trying key: b’0abc06bfde263f3a824c7bd417ac4bdb’
Checking text:b’\xa5\r
\xf5\x8b\xcc\x13\xbe\xed\x1c':\xf5\x8b\xcc\x13\xbe\xed\x1c’:Perhaps utf-8 without BOM
Bad character at 0, value 165
Decryption failed, trying next key.
Trying key: b'4ad220976a1d68b250c6e01169b0e7f3'
Checking text:b'\xfa\x8a\x8f2\x975\xae\xf7\x12g':
Perhaps utf-8 without BOM
Bad character at 0, value 250
Decryption failed, trying next key.
Trying key: b'12759d96ba3388c52a64ff67f0bdffe6'
Checking text:b'\xd3\xdcA\x1b\x9a\x08\x1a7\x01\x97':
Perhaps utf-8 without BOM
Bad character at 0, value 211
Decryption failed, trying next key.
Trying key: b'4492b4ff927d44f3742c99e786c12141'
Checking text:b'\xcb\x8f\x7f\xfb\x14\xfe\r\x97\x19\x9a':
Perhaps utf-8 without BOM
Bad character at 0, value 203
Decryption failed, trying next key.
Trying key: b'ea4b8e6f4f34c3ba496efbb699f34f75'
Checking text:b'\xf1\xbe]\x17Rz\xbe\xda\xa9\x17':
Perhaps utf-8 without BOM
Bad character at 0, value 241
Decryption failed, trying next key.
Trying key: b'c3f1a416eccec2d886e547dc233638bd'
Checking text:b'k"0z+V\x18\xad-\xb4':
Perhaps utf-8 without BOM
Seems to be good text
Success!
DEBUG: 16.3 DecryptAddProgressDialog::do_book_action - decrypted book: 'Dünyanın Merkezine Yolculuk'
Obok DeDRM v7.2.1 - Added Dünyanın Merkezine Yolculuk
Obok DeDRM v7.2.1 - wrapping up results.
Worker Launch took: 0.00 seconds
Running Obok DeDRM v7.2.1
DEBUG: 82.1 didn't find device
Obok v4.0.0
Copyright © 2012-2020 Physisticated et al.
C:\Users\faruk\AppData\Local\Temp\tmpvapysbfu
DEBUG: 82.2 got kobodir C:\Users\faruk\AppData\Local\Kobo\Kobo Desktop Edition
Found 12 possible keys to try.
DEBUG: 88.5 BookListTableWidget:get_books - book_num: 1
DEBUG: 88.5 BookListTableWidget:get_books - book: Dünyanın Merkezine Yolculuk
DEBUG: 88.5 InterfacePluginAction::launchObok - number of books to decrypt: 1
Obok DeDRM v7.2.1 - Decrypting Dünyanın Merkezine Yolculuk
Trying key: b'83be46ace68f0f9187df0d4a327750d8'
Checking text:b')\xda\xbe\xdc\xbcQ\xaans\xbb':
Perhaps utf-8 without BOM
Bad character at 1, value 218
Decryption failed, trying next key.
Trying key: b'7412c544bf3ab93b686a1ddcdbbeca24'
Checking text:b'[\xf3\x14t|\xfd9\xb0<5':
Perhaps utf-8 without BOM
Bad character at 1, value 243
Decryption failed, trying next key.
Trying key: b'0abc06bfde263f3a824c7bd417ac4bdb'
Checking text:b'\xa5\r
Perhaps utf-8 without BOM
Bad character at 0, value 165
Decryption failed, trying next key.
Trying key: b’4ad220976a1d68b250c6e01169b0e7f3′
Checking text:b’\xfa\x8a\x8f2\x975\xae\xf7\x12g’:
Perhaps utf-8 without BOM
Bad character at 0, value 250
Decryption failed, trying next key.
Trying key: b’12759d96ba3388c52a64ff67f0bdffe6′
Checking text:b’\xd3\xdcA\x1b\x9a\x08\x1a7\x01\x97′:
Perhaps utf-8 without BOM
Bad character at 0, value 211
Decryption failed, trying next key.
Trying key: b’4492b4ff927d44f3742c99e786c12141′
Checking text:b’\xcb\x8f\x7f\xfb\x14\xfe\r\x97\x19\x9a’:
Perhaps utf-8 without BOM
Bad character at 0, value 203
Decryption failed, trying next key.
Trying key: b’ea4b8e6f4f34c3ba496efbb699f34f75′
Checking text:b’\xf1\xbe]\x17Rz\xbe\xda\xa9\x17′:
Perhaps utf-8 without BOM
Bad character at 0, value 241
Decryption failed, trying next key.
Trying key: b’c3f1a416eccec2d886e547dc233638bd’
Checking text:b’k”0z+V\x18\xad-\xb4′:
Perhaps utf-8 without BOM
Seems to be good text
Success!
DEBUG: 88.6 DecryptAddProgressDialog::do_book_action – decrypted book: ‘Dünyanın Merkezine Yolculuk’
Obok DeDRM v7.2.1 – Added Dünyanın Merkezine Yolculuk
Obok DeDRM v7.2.1 – wrapping up results.
Obok 7.2.1 on Windows 10 did not decrypt books for me, but going back to Obok 7.1.0 was successful.
What am I doing wrong with trying to convert this book to mobi? I downloaded the ebook from my Amazon account via the “download and use USB” option. Thanks in advance!
calibre Debug log
calibre 2.34 [64bit] isfrozen: True is64bit: True
Windows-8-6.2.9200 Windows (’64bit’, ‘WindowsPE’)
(‘Windows’, ‘8’, ‘6.2.9200’)
Python 2.7.9
Windows: (‘8’, ‘6.2.9200’, ”, ‘Multiprocessor Free’)
Successfully initialized third party plugins: DeDRM
Starting up…
Loaded cached store plugin for: Empik at version: 8
Loaded cached store plugin for: Amazon FR Kindle at version: 15
Loaded cached store plugin for: eBooks.com at version: 3
Loaded cached store plugin for: Woblink at version: 14
Loaded cached store plugin for: Amazon ES Kindle at version: 15
Loaded cached store plugin for: Virtualo at version: 9
Loaded cached store plugin for: Nexto at version: 4
Loaded cached store plugin for: Legimi at version: 9
Loaded cached store plugin for: Baen Ebooks at version: 2
Loaded cached store plugin for: ebook.de at version: 5
Loaded cached store plugin for: Amazon DE Kindle at version: 15
Loaded cached store plugin for: Amazon CA Kindle at version: 7
Loaded cached store plugin for: Smashwords at version: 5
Loaded cached store plugin for: Mills and Boon UK at version: 4
Loaded cached store plugin for: Kobo at version: 7
Loaded cached store plugin for: Ebookpoint at version: 8
Loaded cached store plugin for: Beam EBooks DE at version: 4
Loaded cached store plugin for: Amazon UK Kindle at version: 15
Loaded cached store plugin for: Amazon IT Kindle at version: 15
Loaded cached store plugin for: Google Books at version: 6
Loaded cached store plugin for: Amazon Kindle at version: 17
Loaded cached store plugin for: Publio at version: 9
Loaded cached store plugin for: eBook.nl at version: 2
Started up in 18.17 seconds with 316 books
DeDRM v6.7.0: Trying to decrypt Dr. Colbert’s Keto Zone Diet.azw3
Using Library AlfCrypto DLL/DYLIB/SO
MobiDeDrm v0.42.
Copyright © 2008-2017 The Dark Reverser, Apprentice Harper et al.
Decrypting Kindle Format 8 ebook: Dr. Colbert’s Keto Zone Diet
Got DSN key from database default_key_2
Found 14 keys to try after 0.7 seconds
Crypto Type is: 2
DeDRM v6.7.0: Failed to decrypt with error: No key found in 14 keys tried.
DeDRM v6.7.0: Looking for new default Kindle Key after 0.7 seconds
searching for kinfoFiles in C:\Users\Tarissa\AppData\Local
Found K4PC 1.25+ kinf2018 file: C:\Users\Tarissa\AppData\Local\Amazon\Kindle\storage.kinf2018
Decrypted key file using IDString ‘1548564916’ and UserName ‘54617269737361’
DeDRM v6.7.0: Found 1 new key
MobiDeDrm v0.42.
Copyright © 2008-2017 The Dark Reverser, Apprentice Harper et al.
Decrypting Kindle Format 8 ebook: Dr. Colbert’s Keto Zone Diet
Got DSN key from database default_key_1
Found 3 keys to try after 1.2 seconds
Crypto Type is: 2
DeDRM v6.7.0: Ultimately failed to decrypt after 1.2 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 “site-packages\calibre\customize\ui.py”, line 155, in _run_filetype_plugins
File “calibre_plugins.dedrm.init“, line 625, in run
File “calibre_plugins.dedrm.init“, line 575, in KindleMobiDecrypt
DeDRMError: DeDRM v6.7.0: Ultimately failed to decrypt after 1.2 seconds. Read the FAQs at Harper’s repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md
Added Dr. Colbert’s Keto Zone Diet to db in: 11.2
Added 1 books in 15.5 seconds
When you download a book from the website, you need to choose an E-ink Kindlle (not a Fire) and have the Kindle’s serial number entered into DeDRM’s customization.
I’d recommend updating to the current calibre 5.17 and DeDRM 7.2.1. If you don’t want to update calibre, I’d still update DeDRM to 6.8.1.
I borrow e-books from the library. Usually the DRM doesn’t get in the way, so I leave it. But this time, Adobe stubbornly refused to acknowledge my authorization to read. I tried a bunch of things, called the library, etc. After repeatedly trying to log on to the Adobe website and getting the message, “Something went wrong. Please try again later,” over and over again, I’d had enough. I installed the Calibre plug in.
Now I can read my book. Thanks, Apprentice Alf!
Hello,
I’m on Windows 10 64x. I used Adobe Digital Editions 2.0 to download an e-book from Kaplan’s website via an acsm file which was easily opened by ADE 2.0. I then attempted to import the book from the ADE folder in Documents but I get the error message ‘the security plug-in required by this command is unavailable.’
I followed all the troubleshooting steps in Apprentice Harper’s FAQ but couldn’t get it to work.
I would greatly appreciate any help.
Error log:
calibre Debug log
calibre 5.17 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) && Obok DeDRM (7, 2, 1)
calibre 5.17 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) && Obok DeDRM (7, 2, 1)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 120.0 x 120.0
physicalDpi: 141.7674418604651 x 141.4020618556701
Using calibre Qt style: True
[0.00] Starting up…
[0.00] Showing splash screen…
[1.12] splash screen shown
[1.12] Initializing db…
[1.12] db initialized
[1.12] 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: 0.1 obok::action_err.py – loading translations
[2.70] main UI initialized…
[2.70] Hiding splash screen
Starting QuickView
DeDRM v7.2.1: Trying to decrypt The Official Guide to OET.pdf
DeDRM v7.2.1: The Official Guide to OET.pdf is a PDF ebook
DeDRM v7.2.1: Looking for new default Adobe Digital Editions Keys after 0.1 seconds
Found 1 keys
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 0.3 seconds
DeDRM v7.2.1: Ultimately failed to decrypt after 0.3 seconds. Read the FAQs at Harper’s repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md
[29.61] splash screen hidden
[29.62] Started up in 29.62 seconds with 1 books
Added The Official Guide to OET to db in: 0.2
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
File “calibre_plugins.dedrm.init“, line 515, in PDFDecrypt
calibre_plugins.dedrm.DeDRMError: DeDRM v7.2.1: Ultimately failed to decrypt after 0.3 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
Exception ignored in:
Traceback (most recent call last):
File “calibre_plugins.dedrm.adobekey”, line 268, in del
TypeError: ‘NoneType’ object is not callable
Exception ignored in:
Traceback (most recent call last):
File “calibre_plugins.dedrm.adobekey”, line 268, in del
TypeError: ‘NoneType’ object is not caAdded 1 books in 1.3 seconds
It looks like PDF decryption may not be working in DeDRM 7.2.1. Install portable calibre 4.23 and DeDRM 6.8.1 and see if that does it. If it does, raise an issue at Harper’s github repository.
It worked!!! Thank you very much! I’ll make a note of it on the GitHub.
Just seen this message. Does that mean I need to go back to older versions of Calibre and DeDRM to open/convert ascm files from ADE? Because I can’t open 80% of my files from ADE in Calibre.
How will that affect my other books?
Assume you mean pdfs, since acsm files are what you open in ADE to download the actual book file. Adobe epubs (and some pdfs) will work fine with DeDRM 7.2.1. If you’re on Windows, portable calibre can be run alongside a main installation and it will have its own library and plugins. 64-bit and 32-bit calibre can also be installed at the same time, but by default they will share the same library and plugins.
Trying to use KFX Input with DeDRM 6.6.3 (which works for my ADE content), but unable to get it working for KFX. Any ideas? Log below.
calibre Debug log
calibre 3.16 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.19041-SP0 Windows (’64bit’, ‘WindowsPE’)
(‘Windows’, ’10’, ‘10.0.19041’)
Python 2.7.12+
Windows: (’10’, ‘10.0.19041’, ‘SP0′, u’Multiprocessor Free’)
Interface language: None
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 39, 0) && DeDRM (6, 6, 3) && Package KFX (from KFX Input) (1, 39, 0) && KFX metadata reader (from KFX Input) (1, 39, 0) && KFX Input (1, 39, 0)
calibre 3.16 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.19041-SP0 Windows (’64bit’, ‘WindowsPE’)
(‘Windows’, ’10’, ‘10.0.19041’)
Python 2.7.12+
Windows: (’10’, ‘10.0.19041’, ‘SP0′, u’Multiprocessor Free’)
Interface language: None
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 39, 0) && DeDRM (6, 6, 3) && Package KFX (from KFX Input) (1, 39, 0) && KFX metadata reader (from KFX Input) (1, 39, 0) && KFX Input (1, 39, 0)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 69.8681948424 x 69.9795918367
Using calibre Qt style: True
Starting up…
Started up in 3.63 seconds with 58 books
stdout+stderr from file dialog helper: [”, ”]
piped data from file dialog helper: [‘\xa2\xe1D\xdd\x9a\xff}\xca\xa0 w\xf4\x0f\xdd\xa2E\xda\x94\xcd\x1a(\xb5\x94<#\xec\x0cr\xee\x84{\xf2’, ‘C:\Users\vnasi62\Documents\My Kindle Content\B08L9DLMKK_EBOK\B08L9DLMKK_EBOK.azw’]
Gather KFX-ZIP (from KFX Input) 1.39.0: Importing C:\Users\vnasi62\Documents\My Kindle Content\B08L9DLMKK_EBOK\B08L9DLMKK_EBOK.azw
Gather KFX-ZIP (from KFX Input): Gathered 9 file(s) as C:\Users\vnasi62\AppData\Local\Temp\calibre_x0j7w6\f9apta.kfx-zip
DeDRM v6.6.3: Trying to decrypt f9apta.kfx-zip
Using Library AlfCrypto Python
Decrypting KFX-ZIP ebook: f9apta
Got DSN key from database default_key
Found 1 keys to try after 0.1 seconds
Decrypting KFX DRM voucher: amzn1.drm-voucher.v1.2b4ae03b-ada1-4e40-acc0-e25d5fb4539d.voucher
DeDRM v6.6.3: Failed to decrypt with error: Failed to decrypt KFX DRM voucher with any key
DeDRM v6.6.3: Looking for new default Kindle Key after 0.1 seconds
searching for kinfoFiles in C:\Users\vnasi62\AppData\Local
Found K4PC 2.25+ kinf2018 file: C:\Users\vnasi62\AppData\Local\Amazon\Kindle\storage.kinf2018
Decrypted key file using IDString ‘909018894’ and UserName ‘56617368656e6e’
DeDRM v6.6.3: Found 1 new key
Decrypting KFX-ZIP ebook: f9apta
Got DSN key from database default_key_1
Found 1 keys to try after 0.1 seconds
Decrypting KFX DRM voucher: amzn1.drm-voucher.v1.2b4ae03b-ada1-4e40-acc0-e25d5fb4539d.voucher
DeDRM v6.6.3: 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 “site-packages\calibre\customize\ui.py”, line 171, in _run_filetype_plugins
File “calibre_plugins.dedrm.init“, line 624, in run
File “calibre_plugins.dedrm.init“, line 574, in KindleMobiDecrypt
DeDRMError: DeDRM v6.6.3: 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) 1.39.0: Packaging C:\Users\vnasi62\AppData\Local\Temp\calibre_x0j7w6\f9apta.kfx-zip
Processing container: B08L9DLMKK_EBOK.azw
Running file type plugin Package KFX (from KFX Input) failed with traceback:
Traceback (most recent call last):
File “site-packages\calibre\customize\ui.py”, line 171, in _run_filetype_plugins
File “calibre_plugins.kfx_input.package_filetype”, line 21, in run
File “calibre_plugins.kfx_input.package_filetype”, line 32, in run_kfx
File “calibre_plugins.kfx_input.kfxlib.yj_book”, line 85, in convert_to_single_kfx
File “calibre_plugins.kfx_input.kfxlib.yj_book”, line 212, in decode_book
File “calibre_plugins.kfx_input.kfxlib.yj_book”, line 319, in get_container
KFXDRMError: Book container B08L9DLMKK_EBOK.azw has DRM and cannot be converted
KFX metadata reader (from KFX Input) activated for C:\Users\vnasi62\AppData\Local\Temp\calibre_x0j7w6\ajafcl_add_books\0\B08L9DLMKK_EBOK.kfx-zip
Added Mark. Plan. Teach. 2.0 to db in: 1.9
Added 1 books in 3.0 seconds
For KFX, you need no later then Kindle for PC 1.26. Better to avoid KFX in my opinion. Either way I recommend updating to the latest calibre and DeDRM 7.2.1. If you don’t want to update calibre, at least update to DeDRM 6.8.1. See this post for avoiding or dealing with KFX: https://www.mobileread.com/forums/showthread.php?t=283371
Thanks for the reply. From that link you sent I was able to find a solution that worked. I had to download the cmd file that alters the registry and run Kindle that way.
I’ve been downloading my Amazon books explicitly (I bought a Kindle Paperwhite (2013) just for that ability), and loading them to Calibre. But it stopped working, I can no longer convert the books. I just tried a .azw3 and Calibre tells me it is DRM protected.
I have Calibre 5.17.0
KFX input 1.39.0
KFC Output 1.51.0
What changed? What do I need to do now?
You’re downloading the azw3 file from the website and choosing the Paperwhite as the device? You have the DeDRM 7.2.1 plugin? You have the Paperwhite’s serial number entered correctly into DeDRM’s customization?
When I go to Amazon Devices, I see the PaperWhite (and 6 other devices, although some are duplicates). When I select a book in content, that device is selected, and I download it. This is what I’ve done for years. I don’t know how to find DeDRM’s customization.
In calibre, Preferences > Plugins. Then select DeDRM under File Type plugins and click the Customize plugin button. Then eInk Kindle ebooks and the green plus sign to add a serial number.
Ahh, I looked in other sub categories, but not File Types. It has the same number (without the spaces), as my Kindle (which I had to charge to see). But I have DRM 7.2.0. Calibre doesn’t find any updates (on my Mac).
Calibre won’t tell you about updates for DeDRM. You’ll just hear about it from here or at the GitHub. Here’s a link: https://github.com/apprenticeharper/DeDRM_tools/releases/tag/v7.2.1
Thanks. That did it.
When I go to Amazon and look at my devices, I see two entries for my iPad with different Kindle e-mail addresses. How do I find which one is invalid to delete it?
Try looking under settings in the Kindle app for the send to kindle address. That’s where I see it in the Android app. I’d guess the iPad app is similar.
DRM is not removed
calibre: 5.17
dedrm: 7.2
kfx input: 1.39
kfx output: 1.51
kindle pc: 1.31
using kindle pc, i download my book > B087QPQ1RF_EBOK. Then I drag and drop the book into calibre, so far so good – i can see the metadata like title, description, etc. When i try to convert the book from kfx-zip into epub, i get an error message stating: this book is protected by DRM.
any clue?
Update to DeDRM 7.2.1. Then either use no later then Kindle for PC 1.26 or one of the methods to avoid KFX format. See this post for details: https://www.mobileread.com/forums/showthread.php?t=283371
Having recently got a new Mac with Catalina, I decided to try using Kindle for mac version 1.31 with Method 2 as described on the MobileRead Forum – but I seem to have run into trouble. I started out with Calibre 4.2 & an earlier version of the tools, then updated to Calibre 5.17 & DeDRM 7.2.1, but still no joy.
I am running the kindle app in the same user account as calibre, so I am unsure why it seems not to be able to find a key? Should I try and downgrade to 1.30, or am I making a very obvious mistake that I have missed? I have tried deleting & re-registering the Kindle app, but the problem persists.
calibre Debug log
calibre 5.17 embedded-python: True is64bit: True
macOS-10.15.7-x86_64-i386-64bit Darwin (’64bit’, ”)
(‘Darwin’, ‘19.6.0’, ‘Darwin Kernel Version 19.6.0: Tue Jan 12 22:13:05 PST 2021; root:xnu-6153.141.16~1/RELEASE_X86_64’)
Python 3.8.5
OSX: (‘10.15.7’, (”, ”, ”), ‘x86_64′)
Interface language: en_GB
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 39, 0) && DeDRM (7, 2, 1) && Package KFX (from KFX Input) (1, 39, 0) && KFX metadata reader (from KFX Input) (1, 39, 0) && KFX Input (1, 39, 0) && Obok DeDRM (7, 2, 1)
calibre 5.17 embedded-python: True is64bit: True
macOS-10.15.7-x86_64-i386-64bit Darwin (’64bit’, ”)
(‘Darwin’, ‘19.6.0’, ‘Darwin Kernel Version 19.6.0: Tue Jan 12 22:13:05 PST 2021; root:xnu-6153.141.16~1/RELEASE_X86_64’)
Python 3.8.5
OSX: (‘10.15.7’, (”, ”, ”), ‘x86_64′)
Interface language: en_GB
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 39, 0) && DeDRM (7, 2, 1) && Package KFX (from KFX Input) (1, 39, 0) && KFX metadata reader (from KFX Input) (1, 39, 0) && KFX Input (1, 39, 0) && 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…
[0.02] Showing splash screen…
[0.23] splash screen shown
[0.23] Initializing db…
[0.25] db initialized
[0.25] 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
[1.03] main UI initialized…
[1.03] Hiding splash screen
Starting QuickView
Gather KFX-ZIP (from KFX Input) 1.39.0: Importing /Users/calypso/Library/Application Support/Kindle/My Kindle Content/B07T4SW594_EBOK/B07T4SW594_EBOK.azw
Gather KFX-ZIP (from KFX Input): File is not KFX format
DeDRM v7.2.1: Trying to decrypt B07T4SW594_EBOK.azw
Using Library AlfCrypto Python
Using Library AlfCrypto Python
MobiDeDrm v1.0.
Copyright © 2008-2020 The Dark Reverser, Apprentice Harper et al.
Decrypting Kindle Format 8 ebook: The City We Became (The Great Cities Trilogy)
Got DSN key from database default_key
Got DSN key from database default_key_2
Found 6 keys to try after 0.1 seconds
Crypto Type is: 2
DeDRM v7.2.1: Failed to decrypt with error: No key found in 6 PIDs tried.
DeDRM v7.2.1: Looking for new default Kindle Key after 0.1 seconds
Found k4Mac kinf2018 file: /Users/calypso/Library/Application Support/Kindle/storage/.kinf2018
trying username b’calypso’ on file /Users/calypso/Library/Application Support/Kindle/storage/.kinf2018
trying IDString: b’918c2abb3696′
trying IDString: b’99875e95cc0f’
Decrypted key file using IDString ‘99875e95cc0f’ and UserName ‘calypso’
DeDRM v7.2.1: Found 1 new key
MobiDeDrm v1.0.
Copyright © 2008-2020 The Dark Reverser, Apprentice Harper et al.
Decrypting Kindle Format 8 ebook: The City We Became (The Great Cities Trilogy)
Got SerialNumber from database default_key_1
Got UsernameHash from database default_key_1
Found 4 keys to try after 0.8 seconds
Crypto Type is: 2
DeDRM v7.2.1: Ultimately failed to decrypt after 0.8 seconds. Read the FAQs at Harper’s repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md
[2.99] splash screen hidden
[2.99] Started up in 2.99 seconds with 740 books
Added The City We Became (The Great Cities Trilogy) to db in: 0.0
Running file type plugin DeDRM failed with traceback:
Traceback (most recent call last):
File “calibre_plugins.dedrm.init“, line 540, in KindleMobiDecrypt
book = k4mobidedrm.GetDecryptedBook(path_to_ebook,kindleDatabases,androidFiles,serials,pids,self.starttime)
File “calibre_plugins.dedrm.k4mobidedrm”, line 238, in GetDecryptedBook
mb.processBook(totalpids)
File “calibre_plugins.dedrm.mobidedrm”, line 484, in processBook
raise DrmException(“No key found in {0:d} PIDs tried.”.format(len(goodpids)))
calibre_plugins.dedrm.mobidedrm.DrmException: No key found in 6 PIDs tried.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File “calibre/customize/ui.py”, line 176, in _run_filetype_plugins
File “calibre_plugins.dedrm.init“, line 633, in run
decrypted_ebook = self.KindleMobiDecrypt(path_to_ebook)
File “calibre_plugins.dedrm.init“, line 583, in KindleMobiDecrypt
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 0.8 seconds. Read the FAQs at Harper’s repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md
I’ve seen some trouble with retrieving the key with the latest calibre and DeDRM on Mac if you didn’t update from a previously working setup. I would try with these specific versions: calibre 4.23 and DeDRM 6.8.1. If you get that working, you’ll probably fine to update to the latest. Be sure to download a fresh copy of the book with the current install of Kindle for Mac because the key will change if you de-register and re-register. Delete the book in calibre and add the new copy. Looks like method 2 is still working fine with Kindle for Mac 1.31 since the log shows this book isn’t in KFX format.
can’t convert books or read them. Using the latest version of Calibre and DeDRM. And trying to convert from Android Kindle
here’s the error. this is with all my books, would appreciate any help, thanks!
calibre, version 5.17.0
ERROR: KFX conversion failed: Cannot convert Always a Love SongException(‘Book is incomplete. All of the KFX container files that make up the book must be combined into a KFX-ZIP file for successful conversion. (Missing containers CR!1X4K8M6R054Z9FAMHDMA0NZ54M03, CR!5VRV9GE5EX1H78DYXMTDAXSN43S7)’)
Amazon books from the Android Kindle app cannot be decrypted. You’ll need to use Kindle for PC/Mac or if you have an E-ink Kindle you can use the “download & transfer via USB” option to get decryptable copies from the website (enter the Kindle’s serial number into DeDRM’s customization). See this post for methods: https://www.mobileread.com/forums/showthread.php?t=283371
I didn’t know that, thank you!
It was well worth it for me to buy a cheap paperwhite so that I could do that.
Posting again but actually following the instructions this time (sorry). Thanks so much to anyone who can help me. (After looking at the log, I figure “Key cannot be the null string” must be the problem, but I can’t even begin to guess how I can correct that.)
which tool was used – Calibre 4.23, DeDRM 6.6.3 [I could not get the latest versions working, so I thought I’d revert to a combination of versions that is known to work with nookbooks]
which OS you are using – Win 10
where the ebook file came from (device or application) – Nook (was DL’d via the virtual machine I used to get the key)
any error messages – “This book has DRM. Cannot convert. This book is locked by DRM. To learn more about DRM and why you cannot read or convert this book in Calibre, click here.”
Incidentally, it says below it was trying to use “mykeyX”, but the key is actually called “mykey2″. I tried renaming it to mykeyX to see if it made any difference. The log results were the same.
Log:
calibre Debug log
calibre 4.23 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.19041-SP0 Windows (’64bit’, ‘WindowsPE’)
(‘Windows’, ’10’, ‘10.0.19041’)
Python 2.7.16+
Windows: (’10’, ‘10.0.19041’, ‘SP0′, u’Multiprocessor Free’)
Interface language: None
Successfully initialized third party plugins: DeDRM (6, 6, 3)
calibre 4.23 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.19041-SP0 Windows (’64bit’, ‘WindowsPE’)
(‘Windows’, ’10’, ‘10.0.19041’)
Python 2.7.16+
Windows: (’10’, ‘10.0.19041’, ‘SP0′, u’Multiprocessor Free’)
Interface language: None
Successfully initialized third party plugins: DeDRM (6, 6, 3)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 118.139534884 x 118.445595855
Using calibre Qt style: True
[0.00] Starting up…
[0.00] Showing splash screen…
[0.66] splash screen shown
[0.66] Initializing db…
[0.66] db initialized
[0.66] Constructing main UI…
[2.42] main UI initialized…
[2.42] Hiding splash screen
[6.89] splash screen hidden
[6.89] Started up in 6.89 seconds with 0 books
stdout+stderr from file dialog helper: [”, ”]
piped data from file dialog helper: [‘\xf3\xdd\xf9\x8c\xc4 \x02??s\nA\xa4\xb7\x87\xfe\xac\xf8\x9a\nh\xdf\xdfOVDgq.\x98\xee\xe6’, ‘C:\Users\Kathryn\AppData\Local\Android\Sdk\platform-tools\files\B&N Downloads\Books\2940162703006_epub.v2.epub’]
DeDRM v6.6.3: Trying to decrypt 2940162703006_epub.v2.epub
DeDRM v6.6.3: Verifying zip archive integrity
DeDRM v6.6.3: “2940162703006_epub.v2.epub” is a secure Barnes & Noble ePub
DeDRM v6.6.3: Trying Encryption key mykeyX
Could not decrypt dx6ubr.epub because of an exception:
Traceback (most recent call last):
File “calibre_plugins.dedrm.ignobleepub”, line 280, in decryptBook
File “calibre_plugins.dedrm.ignobleepub”, line 211, in init
File “calibre_plugins.dedrm.ignobleepub”, line 182, in init
File “site-packages\Crypto\Cipher\AES.py”, line 95, in new
File “site-packages\Crypto\Cipher\AES.py”, line 59, in init
File “site-packages\Crypto\Cipher\blockalgo.py”, line 141, in init
ValueError: Key cannot be the null string
DeDRM v6.6.3: Failed to decrypt with key mykeyX after 0.3 seconds
DeDRM v6.6.3: Looking for new NOOK Study Keys after 0.3 seconds
No nook Study log files have been found.
DeDRM v6.6.3: Ultimately failed to decrypt after 0.3 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 “site-packages\calibre\customize\ui.py”, line 172, in _run_filetype_plugins
File “calibre_plugins.dedrm.init“, line 635, in run
File “calibre_plugins.dedrm.init“, line 304, in ePubDecrypt
DeDRMError: DeDRM v6.6.3: Ultimately failed to decrypt after 0.3 seconds. Read the FAQs at Harper’s repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md
Added Ascendance of a Bookworm: Part 3 Adopted Daughter of an Archduke Volume 3 to db in: 0.3
Added 1 books in 1.9 seconds
Worker Launch took: 0.391999959946
Job: 0 Convert book 1 of 1 (Ascendance of a Bookworm: Part 3 Adopted Daughter of an Archduke Volume 3) finished
Convert book 1 of 1 (Ascendance of a Bookworm: Part 3 Adopted Daughter of an Archduke Volume 3)
Conversion options changed from defaults:
read_metadata_from_opf: u’C:\Users\Kathryn\AppData\Local\Temp\calibre_kv0kaa\ojdomc.opf’
verbose: 2
output_profile: u’nook’
Resolved conversion options
calibre version: 4.23.0
{‘asciiize’: False,
‘author_sort’: None,
‘authors’: None,
‘base_font_size’: 0.0,
‘book_producer’: None,
‘change_justification’: u’original’,
‘chapter’: u”//*[((name()=’h1′ or name()=’h2′) and re:test(., ‘\s*((chapter|book|section|part)\s+)|((prolog|prologue|epilogue)(\s+|$))’, ‘i’)) or @class = ‘chapter’]”,
‘chapter_mark’: u’pagebreak’,
‘comments’: None,
‘cover’: None,
‘debug_pipeline’: None,
‘dehyphenate’: True,
‘delete_blank_paragraphs’: True,
‘disable_font_rescaling’: False,
‘dont_split_on_page_breaks’: False,
‘duplicate_links_in_toc’: False,
’embed_all_fonts’: False,
’embed_font_family’: None,
‘enable_heuristics’: False,
‘epub_flatten’: False,
‘epub_inline_toc’: False,
‘epub_toc_at_end’: False,
‘epub_version’: u’2′,
‘expand_css’: False,
‘extra_css’: None,
‘extract_to’: None,
‘filter_css’: u”,
‘fix_indents’: True,
‘flow_size’: 260,
‘font_size_mapping’: None,
‘format_scene_breaks’: True,
‘html_unwrap_factor’: 0.4,
‘input_encoding’: None,
‘input_profile’: <calibre.customize.profiles.InputProfile object at 0x00000154A4E47908>,
‘insert_blank_line’: False,
‘insert_blank_line_size’: 0.5,
‘insert_metadata’: False,
‘isbn’: None,
‘italicize_common_cases’: True,
‘keep_ligatures’: False,
‘language’: None,
‘level1_toc’: None,
‘level2_toc’: None,
‘level3_toc’: None,
‘line_height’: 0.0,
‘linearize_tables’: False,
‘margin_bottom’: 5.0,
‘margin_left’: 5.0,
‘margin_right’: 5.0,
‘margin_top’: 5.0,
‘markup_chapter_headings’: True,
‘max_toc_links’: 50,
‘minimum_line_height’: 120.0,
‘no_chapters_in_toc’: False,
‘no_default_epub_cover’: False,
‘no_inline_navbars’: False,
‘no_svg_cover’: False,
‘output_profile’: <calibre.customize.profiles.NookOutput object at 0x00000154A4E56548>,
‘page_breaks_before’: u’/’,
‘prefer_metadata_cover’: False,
‘preserve_cover_aspect_ratio’: False,
‘pretty_print’: True,
‘pubdate’: None,
‘publisher’: None,
‘rating’: None,
‘read_metadata_from_opf’: u’C:\Users\Kathryn\AppData\Local\Temp\calibre_kv0kaa\ojdomc.opf’,
‘remove_fake_margins’: True,
‘remove_first_image’: False,
‘remove_paragraph_spacing’: False,
‘remove_paragraph_spacing_indent_size’: 1.5,
‘renumber_headings’: True,
‘replace_scene_breaks’: u”,
‘search_replace’: ‘[]’,
‘series’: None,
‘series_index’: None,
‘smarten_punctuation’: False,
‘sr1_replace’: None,
‘sr1_search’: None,
‘sr2_replace’: None,
‘sr2_search’: None,
‘sr3_replace’: None,
‘sr3_search’: None,
‘start_reading_at’: None,
‘subset_embedded_fonts’: False,
‘tags’: None,
‘timestamp’: None,
‘title’: None,
‘title_sort’: None,
‘toc_filter’: None,
‘toc_threshold’: 6,
‘toc_title’: None,
‘transform_css_rules’: ‘[]’,
‘unsmarten_punctuation’: False,
‘unwrap_lines’: True,
‘use_auto_toc’: False,
‘verbose’: 2}
InputFormatPlugin: EPUB Input running
on C:\Users\Kathryn\AppData\Local\Temp\calibre_kv0kaa\e3ffwt.epub
Python function terminated unexpectedly
e3ffwt.epub (Error Code: 1)
Traceback (most recent call last):
File “site.py”, line 114, in main
File “site.py”, line 88, in run_entry_point
File “site-packages\calibre\utils\ipc\worker.py”, line 209, in main
File “site-packages\calibre\gui2\convert\gui_conversion.py”, line 43, in gui_convert_override
File “site-packages\calibre\gui2\convert\gui_conversion.py”, line 28, in gui_convert
File “site-packages\calibre\ebooks\conversion\plumber.py”, line 1110, in run
File “site-packages\calibre\customize\conversion.py”, line 246, in call
File “site-packages\calibre\ebooks\conversion\plugins\epub_input.py”, line 290, in convert
calibre.ebooks.DRMError: e3ffwt.epub
When creating the .b64 file, you put in only those 28 characters including the equal sign at the end? After importing the key, be sure to click ok and apply on your way out of the windows. Then close and restart calibre before adding your books.
BTW, someone over at GitHub is having trouble with not finding any key in the cchashdata.db file. Would you mind sharing what virtual device, Android version, and Nook app version worked for you?
Right, those are the steps I followed. Didn’t work.
I followed the directions at Aric Renzo’s site, which I think you linked here previously. So it was a Nexus 5 with 7.1.1 Nougat (API, not google play) and Nook app version 5.0.2.38. Once I figured out the directions (they were definitely not written for someone who has never done any SW dev or used a terminal interface before), I didn’t have a problem getting the key.
Fun fact: I just tried changing my B&N password. (There is a forward slash in the key, so I was wondering if that could be causing the problem.) The key generated was the same. The error was also the same – “Key cannot be null string”.
I don’t know. That error has usually just meant wrong key for this copy of the book. Possibly the correct key is just not getting put in that database anymore.
Problem solved! I had initially been unable to copy/paste from the terminal window, so I had re-typed the key manually. I managed to figure out how to copy/paste from the terminal window (you have to open the Edit menu and select Mark, highlight the text, then hit Enter, then paste it into Notepad or whatever), saved that file, and tried it again. It worked!
Interestingly, I cannot see any visual difference between the manually typed key and the copy/pasted key, at least in Notepad.
Thanks for your help!
Glad to hear it! Maybe an O that’s actually a zero or something like that.
No, the zero was clearly a zero (had a slash in it). I don’t know. Must have been some unicode formatting.
Anyway, I found Aric Renzo’s instructions so confusing that I posted my own more detailed instructions here. These instructions are for Win 10 users and are geared to people who might know what a virtual device is but have certainly never created one before. Maybe they will help your person at GitHub…
Thank you!
Unable to remove DRM from Kindle file. Latest version of Calibre and DeDRM. Running Kindle PC on same machine fully capable of reading the book. Here is the log file.
calibre Debug log
calibre 5.18 embedded-python: True is64bit: False
Windows-10-10.0.19041 Windows (’32bit’, ‘WindowsPE’)
(‘Windows’, ’10’, ‘10.0.19041’)
Python 3.8.5
Windows: (’10’, ‘10.0.19041’, ”, ‘Multiprocessor Free’)
Interface language: None
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 39, 0) && DeDRM (7, 2, 1) && Package KFX (from KFX Input) (1, 39, 0) && KFX metadata reader (from KFX Input) (1, 39, 0) && KFX Input (1, 39, 0)
calibre 5.18 embedded-python: True is64bit: False
Windows-10-10.0.19041 Windows (’32bit’, ‘WindowsPE’)
(‘Windows’, ’10’, ‘10.0.19041’)
Python 3.8.5
Windows: (’10’, ‘10.0.19041’, ”, ‘Multiprocessor Free’)
Interface language: None
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 39, 0) && DeDRM (7, 2, 1) && Package KFX (from KFX Input) (1, 39, 0) && KFX metadata reader (from KFX Input) (1, 39, 0) && KFX Input (1, 39, 0)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 93.6046065259117 x 93.62457337883959
Using calibre Qt style: True
[0.00] Starting up…
[0.00] Showing splash screen…
[0.83] splash screen shown
[0.83] Initializing db…
[1.19] db initialized
[1.19] Constructing main UI…
[2.78] main UI initialized…
[2.78] Hiding splash screen
Starting QuickView
Gather KFX-ZIP (from KFX Input) 1.39.0: Importing C:/Users/Agata/Documents/My Kindle Content/B08Z4DWY1C_EBOK/B08Z4DWY1C_EBOK.azw
Gather KFX-ZIP (from KFX Input): Gathered 4 file(s) as C:\Users\Agata\AppData\Local\Temp\calibre_brnlkuua\f7dlxt33.kfx-zip
DeDRM v7.2.1: Trying to decrypt f7dlxt33.kfx-zip
[125.23] splash screen hidden
[125.23] Started up in 125.23 seconds with 2762 books
Using Library AlfCrypto DLL/DYLIB/SO
Using Library AlfCrypto DLL/DYLIB/SO
Decrypting KFX-ZIP ebook: f7dlxt33
Found 0 keys to try after 0.9 seconds
Decrypting KFX DRM voucher: amzn1.drm-voucher.v1.5f37c225-d845-4761-8896-70fa82f6b384.voucher
Traceback (most recent call last):
File “calibre_plugins.dedrm.kfxdedrm”, line 83, in decrypt_voucher
File “C:\Users\Agata\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py”, line 879, in decryptvoucher
File “C:\Users\Agata\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py”, line 758, in pkcs7unpad
File “C:\Users\Agata\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 0.9 seconds
searching for kinfoFiles in C:\Users\Agata\AppData\Local
Found K4PC 1.25+ kinf2018 file: C:\Users\Agata\AppData\Local\Amazon\Kindle\storage.kinf2018
Decrypted key file using IDString ‘1081611872’ and UserName ‘Agata’
DeDRM v7.2.1: Found 1 new key
Decrypting KFX-ZIP ebook: f7dlxt33
Got DSN key from database default_key_1
Found 1 keys to try after 9.2 seconds
Decrypting KFX DRM voucher: amzn1.drm-voucher.v1.5f37c225-d845-4761-8896-70fa82f6b384.voucher
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_plugins.dedrm.kfxdedrm”, line 83, in decrypt_voucher
File “C:\Users\Agata\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py”, line 879, in decryptvoucher
File “C:\Users\Agata\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py”, line 758, in pkcs7unpad
File “C:\Users\Agata\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py”, line 98, in _assert
Exception: Incorrect padding – Wrong key
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_plugins.dedrm.kfxdedrm”, line 83, in decrypt_voucher
File “C:\Users\Agata\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py”, line 879, in decryptvoucher
File “C:\Users\Agata\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py”, line 758, in pkcs7unpad
File “C:\Users\Agata\AppData\Roaming\calibre\plugins\DeDRM.zip\ion.py”, line 98, in _assert
Exception: Incorrect padding – Wrong key
DeDRM v7.2.1: Ultimately failed to decrypt after 9.2 seconds. Read the FAQs at Harper’s repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md
Package KFX (from KFX Input) 1.39.0: Packaging C:\Users\Agata\AppData\Local\Temp\calibre_brnlkuua\f7dlxt33.kfx-zip
Processing container: B08Z4DWY1C_EBOK.azw
KFX metadata reader (from KFX Input) activated for C:\Users\Agata\AppData\Local\Temp\calibre_brnlkuua\ywhy5t4e_add_books\0\B08Z4DWY1C_EBOK.kfx-zip
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 176, 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 9.2 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 176, in _run_filetype_plugins
File “calibre_plugins.kfx_input.package_filetype”, line 21, in run
File “calibre_plugins.kfx_input.package_filetype”, line 32, in run_kfx
File “calibre_plugins.kfx_input.kfxlib.yj_book”, line 85, in convert_to_single_kfx
File “calibre_plugins.kfx_input.kfxlib.yj_book”, line 212, in decode_book
File “calibre_plugins.kfx_input.kfxlib.yj_book”, line 319, in get_container
calibre_plugins.kfx_input.kfxlib.utilities.KFXDRMError: Book container Added Crypto 101: A Beginner’s Guide To Cryptocurrency to db in: 1.0
Added 1 books in 11.4 seconds
If you want to stick with the KFX format, then use no later than Kindle for PC 1.26. Or you can use one of the methods to avoid KFX and decrypt the older format. See this post for details: https://www.mobileread.com/forums/showthread.php?t=283371
Downgraded to Kindle 1.17 and worked like charm.
Thanks
Hi! My Calibre stopped letting me turn my Kindle AZW into non-DRMed books s that I can read them with my preferred reader. I am running Kindle 1.31.0 and I’m running the new Calibre with the new DeDRM plugin. I don’t open the book on Kindle, I just download it and then add books on calibre and find the file. Two of them are click/load-able and neither one works. ¯_(ツ)_/¯
Could you please help? Thank y’all so much in advance!
Sounds like you’ve got KFX format which can’t be decrypted from anything after Kindle 1.26. Avoid KFX or use an earlier version of the Kindle app and the KFX Input plugin. See this post: https://www.mobileread.com/forums/showthread.php?t=283371
Hi! Thank you so much in advance. I’m new here so please excuse me if I ask something stupid. I don’t own any Kindle readers, but I bought a few books from Amazon before and now I would like to export them. I used the Window App to download the books, and the export folders were named B00X6OKUW0_EBOK (and something similar). I assume they are encrypted? I installed the latest DeDRM plug-in on Calibre, but it appeared to be error. Hope someone can help me! Here is the log I generated:
calibre Debug log
calibre 5.19 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.19041 Windows (’64bit’, ‘WindowsPE’)
(‘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) && Obok DeDRM (7, 2, 1)
calibre 5.19 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.19041 Windows (’64bit’, ‘WindowsPE’)
(‘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) && Obok DeDRM (7, 2, 1)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 120.0 x 120.0
physicalDpi: 141.7674418604651 x 141.4020618556701
Using calibre Qt style: True
[0.00] Starting up…
[0.00] Showing splash screen…
[0.47] splash screen shown
[0.47] Initializing db…
[0.47] db initialized
[0.47] 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
[0.98] main UI initialized…
[0.98] Hiding splash screen
Starting QuickView
DeDRM v7.2.1: Trying to decrypt B00X6OKUW0_EBOK.azw
Using Library AlfCrypto DLL/DYLIB/SO
Using Library AlfCrypto DLL/DYLIB/SO
DeDRM v7.2.1: Failed to decrypt with error: The .kfx DRMION file cannot be decrypted by itself. A .kfx-zip archive containing a DRM voucher is required.
DeDRM v7.2.1: Looking for new default Kindle Key after 0.1 seconds
searching for kinfoFiles in C:\Users\Cynthia Lam\AppData\Local
Found K4PC 1.25+ kinf2018 file: C:\Users\Cynthia Lam\AppData\Local\Amazon\Kindle\storage.kinf2018
[9.28] splash screen hidden
[9.28] Started up in 9.28 seconds with 0 books
Decrypted key file using IDString ‘646846998’ and UserName ‘Cynthia Lam’
DeDRM v7.2.1: Found 1 new key
DeDRM v7.2.1: Ultimately failed to decrypt after 2.7 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_plugins.dedrm.init“, line 540, in KindleMobiDecrypt
File “calibre_plugins.dedrm.k4mobidedrm”, line 208, in GetDecryptedBook
calibre_plugins.dedrm.k4mobidedrm.DrmException: The .kfx DRMION file cannot be decrypted by itself. A .kfx-zip archive containing a DRM voucher is required.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File “calibre\customize\ui.py”, line 176, 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 2.7 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 289, in get_metadata
File “calibre\ebooks\metadata\mobi.py”, line 503, in get_metadata
File “calibre\ebooks\mobi\reader\headers.py”, line 295, in init
File “calibre\ebooks\mobi\reader\headers.py”, line 323, in identity
calibre.ebooks.mobi.MobiError: Unknown book type: b’\x81\xc4\xde\x02\x9c\xAdded B00X6OKUW0 EBOK to db in: 0.0
Added 1 books in 3.0 seconds
The problem is the KFX format. See this post for avoiding or dealing with it: https://www.mobileread.com/forums/showthread.php?t=283371
It works! Thank you so much!!!!
Time to upgrade Calibre, from 4.22 to latest (5.20). This means upgrading DeDrm from 4.22 to latest (7.21)
My question – do I need to remove the old version of DeDrm, or just install the latest on top??
thx,
You can install DeDRM 7.2.1 over the top. Restart calibre before using.
calibre Debug log
calibre 5.20 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.18362 Windows (’64bit’, ‘WindowsPE’)
(‘Windows’, ’10’, ‘10.0.18362’)
Python 3.8.5
Windows: (’10’, ‘10.0.18362’, ”, ‘Multiprocessor Free’)
Interface language: None
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 39, 0) && DeDRM (7, 2, 1) && Package KFX (from KFX Input) (1, 39, 0) && KFX metadata reader (from KFX Input) (1, 39, 0) && KFX Input (1, 39, 0)
calibre 5.20 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.18362 Windows (’64bit’, ‘WindowsPE’)
(‘Windows’, ’10’, ‘10.0.18362’)
Python 3.8.5
Windows: (’10’, ‘10.0.18362’, ”, ‘Multiprocessor Free’)
Interface language: None
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 39, 0) && DeDRM (7, 2, 1) && Package KFX (from KFX Input) (1, 39, 0) && KFX metadata reader (from KFX Input) (1, 39, 0) && KFX Input (1, 39, 0)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 120.0 x 120.0
physicalDpi: 141.7674418604651 x 142.13471502590673
Using calibre Qt style: True
[0.00] Starting up…
[0.02] Showing splash screen…
[0.58] splash screen shown
[0.58] Initializing db…
[0.61] db initialized
[0.61] Constructing main UI…
[1.23] main UI initialized…
[1.23] Hiding splash screen
Starting QuickView
Gather KFX-ZIP (from KFX Input) 1.39.0: Importing C:\Users\Family-PC\Desktop\New folder\Queeristan_ LGBTQ Inclusion in the Indian Workplace_B08DNTG8LL.kfx
Gather KFX-ZIP (from KFX Input): Cannot locate some files needed for the book. KFX files must remain in their original folder structure for successful import.
Gather KFX-ZIP (from KFX Input): Gathered 1 file(s) as C:\Users\FAMILY~1\AppData\Local\Temp\calibre_eiam0o45\pr1ne3rl.kfx-zip
DeDRM v7.2.1: Trying to decrypt pr1ne3rl.kfx-zip
Using Library AlfCrypto DLL/DYLIB/SO
Using Library AlfCrypto DLL/DYLIB/SO
Decrypting KFX-ZIP ebook: pr1ne3rl
Found 1 keys to try after 0.1 seconds
DeDRM v7.2.1: Failed to decrypt with error: The .kfx-zip archive contains an encrypted DRMION file without a DRM voucher
DeDRM v7.2.1: Looking for new default Kindle Key after 0.1 seconds
searching for kinfoFiles in C:\Users\Family-PC\AppData\Local
Found K4PC 1.25+ kinf2018 file: C:\Users\Family-PC\AppData\Local\Amazon\Kindle\storage.kinf2018
[4.22] splash screen hidden
[4.23] Started up in 4.23 seconds with 0 books
stdout+stderr from file dialog helper: [b”, b”]
piped data from file dialog helper: [b’#H{\xb1\xbf@\t\x14\x0e\xa5\x05\xc1\x8cG\xbc\xbc^`>\xae6\xd4\xe1!\x1c\xe7\x8a\x05\xa8(sq’, b’C:\Users\Family-PC\Desktop\New folder\Queeristan_ LGBTQ Inclusion in the Indian Workplace_B08DNTG8LL.kfx’]
Decrypted key file using IDString ‘2859636301’ and UserName ‘Family-PC’
DeDRM v7.2.1: Found 1 new key
Decrypting KFX-ZIP ebook: pr1ne3rl
Got DSN key from database default_key_1
Found 1 keys to try after 4.3 seconds
DeDRM v7.2.1: Ultimately failed to decrypt after 4.3 seconds. Read the FAQs at Harper’s repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md
Package KFX (from KFX Input) 1.39.0: Packaging C:\Users\FAMILY~1\AppData\Local\Temp\calibre_eiam0o45\pr1ne3rl.kfx-zip
Processing container: Queeristan_ LGBTQ Inclusion in the Indian Workplace_B08DNTG8LL.kfx
KFX metadata reader (from KFX Input) activated for C:\Users\FAMILY~1\AppData\Local\Temp\calibre_eiam0o45\r7yz4e1e_add_books\0\Queeristan_ LGBTQ Inclusion in the Indian Workplace_B08DNTG8LL.kfx-zip
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 66, in decrypt_voucher
Exception: The .kfx-zip archive contains an encrypted DRMION file without a DRM voucher
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File “calibre\customize\ui.py”, line 176, 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 4.3 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 176, in _run_filetype_plugins
File “calibre_plugins.kfx_input.package_filetype”, line 21, in run
File “calibre_plugins.kfx_input.package_filetype”, line 32, in run_kfx
File “calibre_plugins.kfx_input.kfxlib.yj_book”, line 85, in convert_to_single_kfx
File “calibre_plugins.kfx_input.kfxlib.yj_book”, line 212, in decode_book
File “calibre_plugins.kfx_input.kfxlib.yj_book”, line 319, in get_container
calibre_plugins.kfx_input.kfxlib.utilities.KFXDRMError: Book container Queeristan LGBTQ Inclusion in the Indian Workplace_B08DNTG8LL.kfx has DRM and cannot be converted
Traceback (most recent call last):
File “calibre\customize\ui.py”, line 433, in get_file_type_metadata
File “calibre_plugins.kfx_input.metadata_reader”, line 28, in get_metadata
File “calibre_plugins.kfx_input.kfxlib.yj_book”, line 150, in get_metadata
Exception: Failed to locate a KFX container Added Queeristan LGBTQ Inclusion in the Indian Workplace B08DNTG8LL to db in: 2.0
Added 1 books in 6.9 seconds
I got (borrowed) this book from Amazon Prime Reading. I’m using ASUS X541UA Laptop with Windows 10 Pro Version 1909 with OS Build 18363.418
DeDRM is intended for purchased books.
Even if you purchase that book there is a good chance that you won’t be able to remove DRM from it. It is published by Westland, an Indian import of Amazon. Earlier this year they started making their books available only in KFX format with stronger DRM that has not yet been broken.
It is unknown whether this is something that is only going to be applied to the Indian market or if this is a pilot program and will coming to a wider set of books worldwide.
import->imprint (typo)