ngtcp2: verify the server certificate for the gnutls case

Closes #8178

lib/vquic/ngtcp2.c

@@ -32,6 +32,7 @@
 #include "vtls/openssl.h"
 #elif defined(USE_GNUTLS)
 #include <ngtcp2/ngtcp2_crypto_gnutls.h>
+#include "vtls/gtls.h"
 #endif
 #include "urldata.h"
 #include "sendf.h"
@@ -1663,6 +1664,7 @@ static ssize_t ngh3_stream_send(struct Curl_easy *data,
 static CURLcode ng_has_connected(struct Curl_easy *data,
                                  struct connectdata *conn, int tempindex)
 {
+  CURLcode result = CURLE_OK;
   conn->recv[FIRSTSOCKET] = ngh3_stream_recv;
   conn->send[FIRSTSOCKET] = ngh3_stream_send;
   conn->handler = &Curl_handler_http3;
@@ -1671,8 +1673,8 @@ static CURLcode ng_has_connected(struct Curl_easy *data,
   conn->bundle->multiuse = BUNDLE_MULTIPLEX;
   conn->quic = &conn->hequic[tempindex];
 
-#ifdef USE_OPENSSL
   if(conn->ssl_config.verifyhost) {
+#ifdef USE_OPENSSL
     X509 *server_cert;
     CURLcode result;
     server_cert = SSL_get_peer_certificate(conn->quic->ssl);
@@ -1684,13 +1686,13 @@ static CURLcode ng_has_connected(struct Curl_easy *data,
     if(result)
       return result;
     infof(data, "Verified certificate just fine");
+#else
+    result = Curl_gtls_verifyserver(data, conn, conn->quic->ssl, FIRSTSOCKET);
+#endif
   }
   else
     infof(data, "Skipped certificate verification");
-#else
-  (void)data;
-#endif
-  return CURLE_OK;
+  return result;
 }
 
 /*
@@ -1714,8 +1716,9 @@ CURLcode Curl_quic_is_connected(struct Curl_easy *data,
     goto error;
 
   if(ngtcp2_conn_get_handshake_completed(qs->qconn)) {
-    *done = TRUE;
     result = ng_has_connected(data, conn, sockindex);
+    if(!result)
+      *done = TRUE;
   }
 
   return result;

lib/vtls/gtls.c

@@ -808,10 +808,11 @@ static CURLcode pkp_pin_peer_pubkey(struct Curl_easy *data,
 static Curl_recv gtls_recv;
 static Curl_send gtls_send;
 
-static CURLcode
-gtls_connect_step3(struct Curl_easy *data,
-                   struct connectdata *conn,
-                   int sockindex)
+CURLcode
+Curl_gtls_verifyserver(struct Curl_easy *data,
+                       struct connectdata *conn,
+                       gnutls_session_t session,
+                       int sockindex)
 {
   unsigned int cert_list_size;
   const gnutls_datum_t *chainp;
@@ -823,9 +824,6 @@ gtls_connect_step3(struct Curl_easy *data,
   size_t size;
   time_t certclock;
   const char *ptr;
-  struct ssl_connect_data *connssl = &conn->ssl[sockindex];
-  struct ssl_backend_data *backend = connssl->backend;
-  gnutls_session_t session = backend->session;
   int rc;
   gnutls_datum_t proto;
   CURLcode result = CURLE_OK;
@@ -1269,8 +1267,6 @@ gtls_connect_step3(struct Curl_easy *data,
   }
 
   conn->ssl[sockindex].state = ssl_connection_complete;
-  conn->recv[sockindex] = gtls_recv;
-  conn->send[sockindex] = gtls_send;
 
   if(SSL_SET_OPTION(primary.sessionid)) {
     /* we always unconditionally get the session id here, as even if we
@@ -1355,9 +1351,13 @@ gtls_connect_common(struct Curl_easy *data,
 
   /* Finish connecting once the handshake is done */
   if(ssl_connect_1 == connssl->connecting_state) {
-    rc = gtls_connect_step3(data, conn, sockindex);
+    struct ssl_backend_data *backend = connssl->backend;
+    gnutls_session_t session = backend->session;
+    rc = Curl_gtls_verifyserver(data, conn, session, sockindex);
     if(rc)
       return rc;
+    conn->recv[sockindex] = gtls_recv;
+    conn->send[sockindex] = gtls_send;
   }
 
   *done = ssl_connect_1 == connssl->connecting_state;

lib/vtls/gtls.h

@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -28,6 +28,10 @@
 
 #include "urldata.h"
 
+CURLcode
+Curl_gtls_verifyserver(struct Curl_easy *data, struct connectdata *conn,
+                       gnutls_session_t session,
+                       int sockindex);
 extern const struct Curl_ssl Curl_ssl_gnutls;
 
 #endif /* USE_GNUTLS */