[glib-networking] openssl: add back the dummy verify callback

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 8c67b140bbe5e88b9ddcf2d3f91b55aca3317dae
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Thu May 16 13:02:56 2019 +0200

    openssl: add back the dummy verify callback
    
    The certificate verification happens on handshake on our case

 tls/openssl/gtlsserverconnection-openssl.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)
---
diff --git a/tls/openssl/gtlsserverconnection-openssl.c b/tls/openssl/gtlsserverconnection-openssl.c
index 3c3f363..a42294a 100644
--- a/tls/openssl/gtlsserverconnection-openssl.c
+++ b/tls/openssl/gtlsserverconnection-openssl.c
@@ -172,6 +172,13 @@ g_tls_server_connection_openssl_set_property (GObject      *object,
     }
 }
 
+static int
+verify_callback (int             preverify_ok,
+                 X509_STORE_CTX *ctx)
+{
+  return 1;
+}
+
 static void
 g_tls_server_connection_openssl_prepare_handshake (GTlsConnectionBase  *tls,
                                                    gchar              **advertised_protocols)
@@ -194,7 +201,7 @@ g_tls_server_connection_openssl_prepare_handshake (GTlsConnectionBase  *tls,
       break;
     }
 
-  SSL_set_verify (openssl->ssl, req_mode, NULL);
+  SSL_set_verify (openssl->ssl, req_mode, verify_callback);
   /* FIXME: is this ok? */
   SSL_set_verify_depth (openssl->ssl, 0);