Implement Keyring system base

libsettings/src/keyring.cpp

@@ -0,0 +1,63 @@
+/* Copyright 2013 MultiMC Contributors
+ *
+ * Authors: Orochimarufan <orochimarufan.x3@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "include/keyring.h"
+
+#include "osutils.h"
+
+#include "stubkeyring.h"
+
+// system specific keyrings
+/*#if defined(OSX)
+class OSXKeychain;
+#define KEYRING OSXKeychain
+#elif defined(LINUX)
+class XDGKeyring;
+#define KEYRING XDGKeyring
+#elif defined(WINDOWS)
+class Win32Keystore;
+#define KEYRING Win32Keystore
+#else
+#pragma message Keyrings are not supported on your os. Falling back to the insecure StubKeyring
+#endif*/
+
+Keyring *Keyring::instance()
+{
+    if (m_instance == nullptr)
+    {
+#ifdef KEYRING
+        m_instance = new KEYRING();
+        if (!m_instance->isValid())
+        {
+            qWarning("Could not create SystemKeyring! falling back to StubKeyring.");
+            m_instance = new StubKeyring();
+        }
+#else
+        qWarning("Keyrings are not supported on your OS. Fallback StubKeyring is insecure!");
+        m_instance = new StubKeyring();
+#endif
+        atexit(Keyring::destroy);
+    }
+    return m_instance;
+}
+
+void Keyring::destroy()
+{
+    delete m_instance;
+}
+
+Keyring *Keyring::m_instance;