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Appendix A. State Machine

This appendix provides a summary of the legal state transitions for the client and server handshake state machines. State names and message flows are defined in the main protocol specification.

A.1. Client State Machine​

The client state machine defines the valid sequences of messages the client can send and receive during the TLS 1.3 handshake.

A.2. Server State Machine​

The server state machine defines the valid sequences of messages the server can send and receive during the TLS 1.3 handshake.

Complete State Machine Diagrams: For the complete state machine diagrams including all transitions, states, and edge cases, please refer to Appendix A of RFC 8446.