A follow-up fix for potentially missing OpenSSL symbol resolving

This patch also adds 'isValid()' to know if a backend from a plugin
is in working condition (say, there is 'openssl' plugin but no or
old openssl libraries in some system).

Task-number: QTBUG-65922
Change-Id: I0b846536a069ca8c5a94e7191f11c81bac6ad527
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
(cherry picked from commit 573ba145d76f239dbc7464a78aabc06ed4d00419)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/network/ssl/qtlsbackend_openssl.cpp b/src/network/ssl/qtlsbackend_openssl.cpp
index b0dd920aed..e288498820 100644
--- a/src/network/ssl/qtlsbackend_openssl.cpp
+++ b/src/network/ssl/qtlsbackend_openssl.cpp
@@ -41,6 +41,10 @@
 #include "qtlskey_openssl_p.h"
 #include "qx509_openssl_p.h"
 
+// TLSTODO: Later, this code (ensure initialised, etc.)
+// must move from the socket to backend.
+#include "qsslsocket_p.h"
+//
 #include "qsslsocket_openssl_symbols_p.h"
 
 #include <qssl.h>
@@ -83,6 +87,13 @@ QString QTlsBackendOpenSSL::backendName() const
     return builtinBackendNames[nameIndexOpenSSL];
 }
 
+bool QTlsBackendOpenSSL::isValid() const
+{
+    // TLSTODO: backend should do initialization,
+    // not socket.
+    return QSslSocket::supportsSsl();
+}
+
 QList<QSsl::SslProtocol> QTlsBackendOpenSSL::supportedProtocols() const
 {
     QList<QSsl::SslProtocol> protocols;