Client                                           Server

ClientHello,
client_certificate_type=1609Dot2,
server_certificate_type=1609Dot2,  -------->    ServerHello,
                                       {EncryptedExtensions}
                          {client_certificate_type=1609Dot2}
                          {server_certificate_type=1609Dot2}
                                        {CertificateRequest}
                                               {Certificate}
                                         {CertificateVerify}
                                                  {Finished}
  {Certificate}          <-------         [Application Data]
  {CertificateVerify}
  {Finished}             -------->
  [Application Data]     <------->        [Application Data]