Kobo decryption failed

[mcspain84]

Question / bug report

I have downloaded everything in the kobo app but obok tries all decryption keys without success.

Which version of Calibre are you running?

7.11

Which version of the DeDRM plugin are you running?

10.0.9

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

No response

Log output

calibre 7.11 embedded-python: True Windows-10-10.0.22631-SP0 Windows ('64bit', 'WindowsPE') ('Windows', '10', '10.0.22631') Python 3.11.5 Windows: ('10', '10.0.22631', 'SP0', 'Multiprocessor Free') Interface language: None EXE path: C:\Program Files\Calibre2\calibre-debug.exe Successfully initialized third party plugins: DeDRM (10, 0, 9) && Obok DeDRM (10, 0, 9) QPA platform: windows devicePixelRatio: 1.0 logicalDpi: 96.0 x 96.0 physicalDpi: 89.6470588235294 x 90.53465346534654 ApplicationPaletteChange event ignored Using calibre Qt style: True ApplicationPaletteChange event received [0.00] Starting up... [0.00] Showing splash screen... [0.16] splash screen shown [0.16] Initializing db... [0.16] db initialized [0.16] 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 [0.56] GUI main window shown [0.58] main UI initialized... [0.58] Hiding splash screen [0.69] splash screen hidden [0.69] Started up in 0.69 seconds with 0 books Running Obok DeDRM v10.0.9 DEBUG: 4.6 didn't find device Obok v10.0.9 Copyright © 2012-2023 Physisticated et al. C:\Users\marce\AppData\Local\Temp\tmp5efjnr1z DEBUG: 4.6 got kobodir C:/Users/marce/AppData/Local/Kobo/Kobo Desktop Edition Found 12 possible keys to try. DEBUG: 6.9 BookListTableWidget:get_books - book_num: 0 DEBUG: 6.9 BookListTableWidget:get_books - book: Teenage Mutant Ninja Turtles: The IDW Collection, Vol. 1 DEBUG: 6.9 InterfacePluginAction::launchObok - number of books to decrypt: 1 Obok DeDRM v10.0.9 - Decrypting Teenage Mutant Ninja Turtles: The IDW Collection, Vol. 1 Trying key: b'7d7c32987fbc11ceb0f5137b8b328b47' Checking text:b']\xde\xce\xe3\x86&/\xc4Q\x19': Perhaps utf-8 without BOM Bad character at 1, value 222 Decryption failed, trying next key. Trying key: b'5c72d4e6a082d9125d8942af668df254' Checking text:b'p\xabqm\xcd\x1c\xd8!XZ': Perhaps utf-8 without BOM Bad character at 1, value 171 Decryption failed, trying next key. Trying key: b'3ba1bc8c6d2364d1ddf1982a74b644e9' Checking text:b'\x80\x9d\xbc\xc3\x7f\x81>\xaf\x94w': Perhaps utf-8 without BOM Bad character at 0, value 128 Decryption failed, trying next key. Trying key: b'9c1fd224ce3c60240c2a8355276c027d' Checking text:b"\x13\x1e\x06<As\x05'|V": Perhaps utf-8 without BOM Bad character at 0, value 19 Decryption failed, trying next key. Trying key: b'131763a5a60970a6e61ef9136e5ad381' Checking text:b'6\xcfM\x06\xff)z{\xe6\x92': Perhaps utf-8 without BOM Bad character at 1, value 207 Decryption failed, trying next key. Trying key: b'5b79817af8a1e35f95c95695c849a397' Checking text:b'\xc9\xb5\x13I\xe3>T\xe2\xbaC': Perhaps utf-8 without BOM Bad character at 0, value 201 Decryption failed, trying next key. Trying key: b'4df3cd7294b2dfda28a5eb42abbebb51' Checking text:b'Z\xaf\xaeJH\xe2\x1a\x92\xba\x86': Perhaps utf-8 without BOM Bad character at 1, value 175 Decryption failed, trying next key. Trying key: b'3a9f274f93b86494c56d03b5679e494e' Checking text:b'i\xbfD\x93\x99Yh\xa7+=': Perhaps utf-8 without BOM Bad character at 1, value 191 Decryption failed, trying next key. Trying key: b'e00d321cd27c67252942e21234f2a1ee' Checking text:b'\xfd\x90\xd5z\xb8\x11\x07C\xac\x82': Perhaps utf-8 without BOM Bad character at 0, value 253 Decryption failed, trying next key. Trying key: b'f7e6720b2b6bfae75cdaa02032b99d8d' Checking text:b'Lu\xaf\xd9\x04\xec6\xec19': Perhaps utf-8 without BOM Bad character at 2, value 175 Decryption failed, trying next key. Trying key: b'4afac1e53480f696a51dbfbdb18cd975' Checking text:b'w\x12\xe6\xca\xab3\xdb\xe9\x89\x8d': Perhaps utf-8 without BOM Bad character at 1, value 18 Decryption failed, trying next key. Trying key: b'575b3fb3e9aec38e509095bf73056718' Checking text:b'q\xd6\xdbu\xe4\xe4 \x1ar\x8e': Perhaps utf-8 without BOM Bad character at 1, value 214 Decryption failed, trying next key. Obok DeDRM v10.0.9 - Couldn't decrypt Teenage Mutant Ninja Turtles: The IDW Collection, Vol. 1 DEBUG: 7.0 DecryptAddProgressDialog::do_book_action - book decryption failed: 'Teenage Mutant Ninja Turtles: The IDW Collection, Vol. 1' Obok DeDRM v10.0.9 - wrapping up results.

[ElleKayEm]

I've noticed that books which aren't available for download as a regular epub don't seem to be decryptable when downloaded this way either.

[mcspain84]

After three times deinstalling kobo and calibre it suddendly worked.

[ElleKayEm]

Hmm...well, that's good. Thanks for reporting back.