CLI: add 'analyze' subcommand for offline HIBP breach checks

This new subcommand checks all passwords in the given database against a given list of SHA-1 password hashes. Such lists are available from the "Have I Been Pwned" project at https://haveibeenpwned.com/Passwords.

Note that this support offline checking only. The HIBP project also provides a web API for checking specific hash ranges; this is not currently supported.

src/cli/Analyze.h

@@ -0,0 +1,35 @@
+/*
+ *  Copyright (C) 2019 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_ANALYZE_H
+#define KEEPASSXC_ANALYZE_H
+
+#include "DatabaseCommand.h"
+
+class Analyze : public DatabaseCommand
+{
+public:
+    Analyze();
+    int executeWithDatabase(QSharedPointer<Database> db, QSharedPointer<QCommandLineParser> parser) override;
+
+    static const QCommandLineOption HIBPDatabaseOption;
+
+private:
+    void printHibpFinding(const Entry* entry, int count, QTextStream& out);
+};
+
+#endif // KEEPASSXC_HIBP_H