DeDRE and Kortext

[paszczakus91]

Hi,
I want to ask, it is any possibility to remove DRE from pdf downloaded via Kortext app?
ADE 2.0.1 authorize pdf but doesn't open it
ADE 3.0 and ADE 4.5 authorize and open PDF

calibre 5.32 [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: pl
Successfully initialized third party plugins: DeDRM (7, 2, 1) && Obok DeDRM (7, 2, 1)
calibre 5.32 [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: pl
Successfully initialized third party plugins: DeDRM (7, 2, 1) && Obok DeDRM (7, 2, 1)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 94.14671814671814 x 94.07407407407408
Using calibre Qt style: True
[0.00] Starting up...
[0.02] Showing splash screen...
[0.52] splash screen shown
[0.52] Initializing db...
[0.52] db initialized
[0.52] 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
Key 'S' for shortcut Zapisz na dysku is already used by Scal wpisy książki, ignoring
[1.16] main UI initialized...
[1.16] Hiding splash screen
Starting QuickView
DeDRM v7.2.1: Trying to decrypt PDF_FILE.pdf
DeDRM v7.2.1: PDF_FILE.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
DeDRM v7.2.1: Exception when decrypting after 0.1 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 0.1 seconds
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 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 0.1 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 0x000001D36F50EA60>
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 0x000001D36F50EA60>
Traceback (most recent call last):
File "calibre_plugins.dedrm.adobekey", line 268, in del
TypeError: 'NoneType' object is not callable
[32.33] splash screen hidden
[32.33] Started up in 32.33 seconds with 1 books
stdout+stderr from file dialog helper: [b'', b'']
piped data from file dialog helper: [b'`\x8fi\xf5\\xf1\xaf\xb72v\xf1O\xf3\xecMN\xd2oI*\xc3O\t\xde\xef@~\x7f\xf3\x0ec\x89', b'C:\Users\admin\AppData\Local\Packages\Kortext.Kortext_htp4jyd3mpprc\LocalState\Library\PDF_FILE.pdf']
Added PDF_FILE to db in: 0.1
Added 1 books in 0.8 seconds

[Leseratte10]

This looks like a PDF with the new Adobe DRM.
Did you initially download it with ADE 2 or ADE3+?

There's some books that require ADE 3, they can't be opened in ADE 2 (or have their DRM removed) at all.
And there's also books that can be opened in ADE 2, but if you open them in ADE 3 once they'll be permanently locked to ADE 3.

[paszczakus91]

Initially, I downloaded it with ADE 4.5, but I will try on another system with ADE 2

[paszczakus91]

On fresh Windows I tried to open file via ADE 2 with error (but after successful authorization)
In Calibre I received the same error #1950 (reply in thread)

[ZolaLa9]

@paszczakus91 - Have you tried v10.0.2 maintained by @noDRM? (Apprentice Harper is is no longer maintaining these tools.)

I suspect v10.0.2 will not work either, however noDRM has made a variety of changes to the ADE process, including adding "more verbose error message when trying to remove DRM from a book with the new, not-yet-cracked version of the Adobe ADEPT DRM".

[paszczakus91]

No, i didn't try it, but I will :)

[paszczakus91]

I received:

DeDRM v10.0.2: Trying a new default key
This seems to be an Adobe ADEPT PDF with Adobe's new DRM
This DRM cannot be removed yet. 
Try getting your distributor to give you a new ACSM file, then open that in an old version of ADE (2.0).
If your book distributor is not enforcing the new DRM yet, this will give you a copy with the old DRM.
DeDRM v10.0.2: Exception when decrypting after 0.3 seconds

[ZolaLa9]

Thanks for reporting back. 10.0.x is so new I was curious what the "more verbose message" would produce :)