I have the same problem as you.But I found this link:https://gist.github.com/c4mx/0f8eacea356ca01fc8315483ba348b23. After testing, this computes the correct PTK. And I looked at your code, and I think these are the problems that caused you to solve the problem incorrectly. 01.aNonce sNonce, apMac, and cliMac should all use the a2b_hex function 02. You should use bytes([i]) instead of str(i).encode('ascii'). They don't produce the same result (e.g., b'\x01' and b'1') 03. The PRF function needs b"\x00" between A and B. English is not my native language, so the machine translation text might be a bit strange.