The Illustrated TLS Connection

[nir]

Every byte of a TLS connection explained and reproduced.

In this demonstration a client has connection to a server, negotiated a TLS 1.2 session, sent "ping", received "pong", and then terminated the session. Click below to begin exploring.

 

Client Hello

Server Hello

Server Certificate

Server Key Exchange Generation

Server Key Exchange

Server Hello Done

Client Key Exchange Generation

Client Key Exchange

Client Encryption Keys Calculation

Client Change Cipher Spec

Client Handshake Finished

Server Encryption Keys Calculation

Server Change Cipher Spec

Server Handshake Finished

Client Application Data

Server Application Data

Client Close Notify

 

The code for this project can be found on GitHub.

Source