Client                                           Server
ClientHello,
client_certificate_type=(1609Dot2),
server_certificate_type=(1609Dot2,
X509,RawPublicKey),         ----------->         ServerHello,
                                        {EncryptedExtensions}  
                           {client_certificate_type=1609Dot2}
                               {server_certificate_type=X509}
                                         {CertificateRequest}
                                                {Certificate}  
                                          {CertificateVerify} 
                                                   {Finished}  
                            <---------     [Application Data]
{Finished}                  --------->
[Application Data]          <-------->     [Application Data]