Add TLS support to Ethernet library

libraries/Ethernet/src/EthernetSSLClient.cpp

@@ -0,0 +1,5 @@
+#include "EthernetSSLClient.h"
+
+arduino::EthernetSSLClient::EthernetSSLClient(): _disableSNI{false}  {
+  onBeforeConnect(mbed::callback(this, &EthernetSSLClient::setRootCA));
+};

libraries/Ethernet/src/EthernetSSLClient.h

@@ -0,0 +1,70 @@
+/*
+  EthernetSSLClient.h
+  Copyright (c) 2021 Arduino SA.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef ETHERNETSSLCLIENT_H
+#define ETHERNETSSLCLIENT_H
+
+#include "EthernetClient.h"
+
+#include <FATFileSystem.h>
+#include <MBRBlockDevice.h>
+#include <QSPIFBlockDevice.h>
+
+extern const char CA_CERTIFICATES[];
+
+namespace arduino {
+
+class EthernetSSLClient : public arduino::EthernetClient {
+
+public:
+  EthernetSSLClient();
+  virtual ~EthernetSSLClient() {
+    stop();
+  }
+
+  int connect(IPAddress ip, uint16_t port) {
+    return connectSSL(ip, port);
+  }
+  int connect(const char* host, uint16_t port) {
+    return connectSSL(host, port, _disableSNI);
+  }
+  void disableSNI(bool statusSNI) {
+    _disableSNI = statusSNI;
+  }
+
+private:
+  int setRootCA() {
+
+    QSPIFBlockDevice root;
+    mbed::MBRBlockDevice wifi_data(&root, 1);
+    mbed::FATFileSystem wifi("wlan");
+
+    int err = wifi.mount(&wifi_data);
+    if (err)
+      return err;
+
+    return ((TLSSocket*)sock)->set_root_ca_cert_path("/wlan/");
+  }
+
+  bool _disableSNI;
+};
+
+}
+
+#endif /* EthernetSSLCLIENT_H */