Remove coordinate functions and change state machine in server side

Change-Id: Id4abf78f493e77afc289409db691c9c61acde1d2
Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index 1288e49..fa297cb 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -1342,6 +1342,8 @@
     if( authmode == MBEDTLS_SSL_VERIFY_NONE )
         return( SSL_CERTIFICATE_REQUEST_SKIP );
 
+    ssl->handshake->cert_request_send = 1;
+
     return( SSL_CERTIFICATE_REQUEST_SEND_REQUEST );
 }
 
@@ -1495,7 +1497,15 @@
                 MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE );
         return( ret );
     }
-    mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_FINISHED );
+    if( ssl->handshake->cert_request_send )
+    {
+        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE );
+
+        MBEDTLS_SSL_DEBUG_MSG( 1, ( "Switch to handshake keys for inbound traffic" ) );
+        mbedtls_ssl_set_inbound_transform( ssl, ssl->handshake->transform_handshake );
+    }
+    else
+        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_FINISHED );
     return( 0 );
 }