feat(Core/Authserver): TOTP rewrite (#5620)

src/common/Cryptography/TOTP.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2016+  AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+  WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef WARHEAD_TOTP_H
+#define WARHEAD_TOTP_H
+
+#include "Define.h"
+#include <ctime>
+#include <vector>
+
+namespace acore::Crypto
+{
+    struct AC_COMMON_API TOTP
+    {
+        static constexpr size_t RECOMMENDED_SECRET_LENGTH = 20;
+        using Secret = std::vector<uint8>;
+
+        static uint32 GenerateToken(Secret const& key, time_t timestamp);
+        static bool ValidateToken(Secret const& key, uint32 token);
+    };
+}
+
+#endif