Authentication

Protocol to handle the Authentication Phase

Assume the client wants to log in via user account U and that user account is defined to use authentication method server_method. The fast authentication path is used when:

• the server used server_method to generate authentication data in the Protocol::Handshake packet.
• the client used a client_authentication_method in Protocol::HandshakeResponse: that is compatible with the server_method used by the server.

In that case the first round of authentication has been already commenced during the handshake. Now, depending on the authentication method server_method, further authentication can be exchanged until the server either accepts or refuses the authentication.