TLS 1.2. Handshake: Where do Client and Server negotiate how the master key is built from randoms and pre?

I am currently trying to solve an exercise where I should look at a TLS 1.2 handshake trace while having access to pre and both randoms (server random and client random).

In order to decrypt application data, I need to rebuild the master … Continue reading TLS 1.2. Handshake: Where do Client and Server negotiate how the master key is built from randoms and pre?