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Examining the Authentication Credentials with read_auth()

The read_auth () function is triggered when an authentication handshake is initiated by the Client. In

the execution sequence, read_auth () occurs immediately after

read_handshake (), so the server

selection has already been madę, but the connection and authorization information

has not yet been

provided to the backend server.

You can obtain the authentication information by examining the

proxy.connection.client

structure. For morę information, see proxy.connection [1943].

For example, you can print the user name and password supplied during authorization using:

function read_auth()

print(" username : " proxy.connection.client.username) print(" password : " .. string.format proxy.connection.client.scrambled_password)) end

You can interrupt the authentication process within this function and return an error packet back to the

client by constructing a new packet and returning proxy. PROXY_SEND_RESULT:

proxy.response.type - proxy.MYSQLD_PACKET_ERR proxy.respon3e.errmsg - "Logins are not allowed" return proxy.PROXY_SEND_RESULT