Update test cases and encrypted extension state set

Change-Id: Ie1acd10b61cefa9414169b276a0c5c5ff2f9eb79
Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index 4a44003..01dff8c 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -1264,21 +1264,24 @@
     mbedtls_ssl_add_hs_msg_to_checksum(
         ssl, MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS, buf, msg_len );
 
-    /* Update state */
-    MBEDTLS_SSL_PROC_CHK_NEG( ssl_tls13_certificate_request_coordinate( ssl ) );
-    if( ret == SSL_CERTIFICATE_REQUEST_SEND_REQUEST )
-        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CERTIFICATE_REQUEST );
-    else
-        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_CERTIFICATE );
-
     MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_finish_handshake_msg(
                               ssl, buf_len, msg_len ) );
 
+    /* Update state */
 #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
     if( mbedtls_ssl_tls13_some_psk_enabled( ssl ) )
         mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_FINISHED );
     else
-        mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_CERTIFICATE );
+    {
+        MBEDTLS_SSL_PROC_CHK_NEG( ssl_tls13_certificate_request_coordinate( ssl ) );
+        if( ret == SSL_CERTIFICATE_REQUEST_SEND_REQUEST )
+            mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CERTIFICATE_REQUEST );
+        else
+        {
+            mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_CERTIFICATE );
+            ret = 0;
+        }
+    }
 #else
     mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_FINISHED );
 #endif