Unknown key when decrypting Oppo OFP (SHA256: 04676d42ed1c20ba5a390ea5757a126ecbc671727ca3fb52fd8c1a0207a23b08)

[sheerazyt55-alt]

Hello,

I’m trying to decrypt an Oppo OFP firmware file and receive “Unknown key. Please ask the author for support :)”.

Details:

• File name: 123.ofp
• SHA256: 04676d42ed1c20ba5a390ea5757a126ecbc671727ca3fb52fd8c1a0207a23b08
• Script used: ofp_mtk_decrypt.py (latest from GitHub, downloaded [today’s date])
• Python version: 3.13 on Windows 10/11
• Command run:
  python ofp_mtk_decrypt.py "C:\Users\ESHOP\Desktop\123.ofp" output_mtk
• Console output:
  b'ab3f76d7989207f2' b'2bf515b3a9737835'
  Unknown key. Please ask the author for support :)

Device info (if known):

• [OPPO A5 2020 / cph1931]

Thanks for your work on this tool!