COM_CHANGE_USER

COM_CHANGE_USER resets the connection and re-authenticates with the given credentials. The packet is identical to the authentication packet in the connection handshake.

Fields

  • int<1> 0x11 : COM_CHANGE_USER header
  • string<NUL> username
  • if (server_capabilities & CLIENT_SECURE_CONNECTION)
    • int<1> length of authentication response
    • string authentication response
  • else
  • if (server_capabilities & CLIENT_CONNECT_WITH_DB)
  • int<2> client character collation
  • if (server_capabilities & CLIENT_PLUGIN_AUTH)
  • if (server_capabilities & CLIENT_CONNECT_ATTRS)

Response

Server response is like connection authentication :

  • An OK packet in case of success OK_Packet.
  • An error packet in case of error ERR_Packet.
  • Authentication switch
    • If the client or server doesn't have PLUGIN_AUTH capability:
      • Server sends 0xFE byte .
      • Client sends old_password.
    • else
    • Authentication switch ends with server sending either OK_Packet or ERR_Packet.

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