Introduce Authenticator: Centralizes Authentication/password check logic

authenticator.h

@@ -0,0 +1,30 @@
+#ifndef AUTHENTICATOR_H
+#define AUTHENTICATOR_H
+#include <variant>
+#include "database/userdao.h"
+
+enum AuthenticationError
+{
+	UserNotFound,
+	UserDisabled,
+	PasswordNotMatch,
+	BannedIP,
+	GeneralError
+};
+
+class Authenticator
+{
+  private:
+	UserDao *userDao;
+	bool isBanned(std::string ip);
+	void incFailureCount(std::string ip);
+	std::vector<char> pbkdf5(std::string password, const std::vector<char> &salt);
+
+  public:
+	Authenticator(UserDao &userDao);
+	std::variant<User, AuthenticationError> authenticate(std::string username, std::string password);
+	std::variant<User, AuthenticationError> authenticate(std::string username, std::string password, std::string ip);
+	std::vector<char> hash(std::string password, const std::vector<char> &salt);
+};
+
+#endif // AUTHENTICATOR_H