![]() TLS also supports compression, but it’s rarely used. The full client random looks as follows (we will need this value later):ĥ6 d9 7d 9d be c6 ea 92 23 c1 5f d6 3d fd 22 24ĩ0 13 f2 34 aa 04 ed cc 30 8a f6 c5 09 f8 60 a5 Just after the TLS header comes the payload which most important parts are: client random (32 bytes composed of the Unix time and 28 bytes of random bytes) and cipher suites supported by the client and extensions understood by the client. GMT Unix Time: 13:20:45.000000000 Central European Standard Time TLSv1 Record Layer: Handshake Protocol: Client Hello The handshake starts with a ClientHello message sent from the client to the server (the output is taken from Wireshark): TLS is an onion protocol and next layers (handshake, application data etc.) are embedded in the record layer. Where ContentType defines the type of a message (such as handshake, alert, application_data etc.) and ProtocolVersion describes the TLS version in use (where TLS1.0 is represented as 0x0301 and TLS1.2 is 0x0303). Each TLS message can be represented by the structure (which is a part of the TLS record layer): Let’s move back to the data transmitted between our parties.
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