Implement Keyring system base

libsettings/src/stubkeyring.cpp

@@ -0,0 +1,96 @@
+/* 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 "stubkeyring.h"
+
+#include <QStringList>
+
+// Scrambling
+// this is NOT SAFE, but it's not plain either.
+int scrambler = 0x9586309;
+
+QString scramble(QString in_)
+{
+    QByteArray in = in_.toUtf8();
+    QByteArray out;
+    for (int i = 0; i<in.length(); i++)
+        out.append(in.at(i) ^ scrambler);
+    return QString::fromUtf8(out);
+}
+
+inline QString base64(QString in)
+{
+    return QString(in.toUtf8().toBase64());
+}
+inline QString unbase64(QString in)
+{
+    return QString::fromUtf8(QByteArray::fromBase64(in.toLatin1()));
+}
+
+inline QString scramble64(QString in)
+{
+    return base64(scramble(in));
+}
+inline QString unscramble64(QString in)
+{
+    return scramble(unbase64(in));
+}
+
+// StubKeyring implementation
+inline QString generateKey(QString service, QString username)
+{
+    return QString("%1/%2").arg(base64(service)).arg(scramble64(username));
+}
+
+bool StubKeyring::storePassword(QString service, QString username, QString password)
+{
+    m_settings.setValue(generateKey(service, username), scramble64(password));
+    return true;
+}
+
+QString StubKeyring::getPassword(QString service, QString username)
+{
+    QString key = generateKey(service, username);
+    if (!m_settings.contains(key))
+        return QString();
+    return unscramble64(m_settings.value(key).toString());
+}
+
+inline bool StubKeyring::hasPassword(QString service, QString username)
+{
+    return m_settings.contains(generateKey(service, username));
+}
+
+QStringList StubKeyring::getStoredAccounts(QString service)
+{
+    service = base64(service).append('/');
+    QStringList out;
+    QStringList in(m_settings.allKeys());
+    QStringListIterator it(in);
+    while(it.hasNext())
+    {
+        QString c = it.next();
+        if (c.startsWith(service))
+            out << unscramble64(c.mid(service.length()));
+    }
+    return out;
+}
+
+StubKeyring::StubKeyring() :
+    m_settings(QSettings::UserScope, "Orochimarufan", "Keyring")
+{
+}