1 files changed, 90 insertions, 0 deletions
diff --git a/src/format/KdbxWriter.h b/src/format/KdbxWriter.h
new file mode 100644
index 000000000..5aa41766e
--- /dev/null
+++ b/src/format/KdbxWriter.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2018 KeePassXC Team <team@keepassxc.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 or (at your option)
+ * version 3 of the License.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef KEEPASSXC_KDBXWRITER_H
+#define KEEPASSXC_KDBXWRITER_H
+
+#include "KeePass2.h"
+#include "core/Endian.h"
+
+#include <QCoreApplication>
+
+#define CHECK_RETURN_FALSE(x) if (!(x)) return false;
+
+class QIODevice;
+class Database;
+
+/**
+ * Abstract KDBX writer base class.
+ */
+class KdbxWriter
+{
+Q_DECLARE_TR_FUNCTIONS(KdbxWriter)
+
+public:
+    KdbxWriter() = default;
+    virtual ~KdbxWriter() = default;
+
+    bool writeMagicNumbers(QIODevice* device, quint32 sig1, quint32 sig2, quint32 version);
+
+    /**
+     * Write a database to a device in KDBX format.
+     *
+     * @param device output device
+     * @param db source database
+     * @return true on success
+     */
+    virtual bool writeDatabase(QIODevice* device, Database* db) = 0;
+
+    bool hasError() const;
+    QString errorString() const;
+
+protected:
+
+    /**
+     * Helper method for writing a KDBX header field to a device.
+     *
+     * @tparam SizedQInt field width
+     * @param device output device
+     * @param fieldId field identifier
+     * @param data field contents
+     * @return true on success
+     */
+    template <typename SizedQInt>
+    bool writeHeaderField(QIODevice* device, KeePass2::HeaderFieldID fieldId, const QByteArray& data)
+    {
+        Q_ASSERT(static_cast<unsigned long>(data.size()) < (1ull << (sizeof(SizedQInt) * 8)));
+
+        QByteArray fieldIdArr;
+        fieldIdArr[0] = static_cast<char>(fieldId);
+        CHECK_RETURN_FALSE(writeData(device, fieldIdArr));
+        CHECK_RETURN_FALSE(writeData(device, Endian::sizedIntToBytes<SizedQInt>(static_cast<SizedQInt>(data.size()),
+                                                                                KeePass2::BYTEORDER)));
+        CHECK_RETURN_FALSE(writeData(device, data));
+
+        return true;
+    }
+
+    bool writeData(QIODevice* device, const QByteArray& data);
+    void raiseError(const QString& errorMessage);
+
+    bool m_error = false;
+    QString m_errorStr = "";
+};
+
+
+#endif //KEEPASSXC_KDBXWRITER_H