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Fix FileOpen DRM#962

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Fix FileOpen DRM#962
freyta wants to merge 4 commits intonoDRM:masterfrom
freyta:master

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@freyta freyta commented Feb 20, 2026

Updated the FileOpen DRM so it uses the new URL encryption scheme.

Fixed the computation of the machine and disk keys, so you can decrypt previously opened files from your computer. Previously the machine key was always generating "22222222", and the machine code was slightly off so the last 2 digits were wrong.

Removed unused imports, cleaned up unused code (Linux and fopn_flock)
Added encrypted URL request and responses.
Updated from Windows Vista, to Windows 10 64-bit
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freyta commented Feb 20, 2026

If someone else can upload a PDF that wasn't decrypting to try and debug it that would help. I don't know if my changes break previous requests - I haven't got a PDF to test with..

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