Limit impact of e78c248 to TLS 1.3 only

https://winscp.net/tracker/1834 Source commit: d4f10f2624093a4781a579b8c041b64c9d6661c4
winscp · Apr 23, 2020 · cf7a87c · cf7a87c
1 parent cdfe45d
commit cf7a87c
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/source/filezilla/AsyncSslSocketLayer.cpp b/source/filezilla/AsyncSslSocketLayer.cpp
@@ -986,6 +986,11 @@ BOOL CAsyncSslSocketLayer::ShutDown(int nHow /*=sends*/)
     if (res == 0)
     {
       res = SSL_shutdown(m_ssl);
+      // While this should not be necessary, with IIS we get timeout otherwise
+      if (SSL_version(m_ssl) <= TLS1_2_VERSION)
+      {
+        res = 0;
+      }
     }
     if (res >= 0)
     {