FlexCryptMethods -TizzyT

        private static void FlexEncrypt(string srcFile, string desDirectory, string password)
        {
            // Generate 32 Crypto Random bytes
            byte[] KeyIV = CryptoRandomFill(new byte[32]);
            // Get SHA256 Hash of password
            byte[] PasswordHash = SHA256(Encoding.UTF8.GetBytes(password));
            // Generate bit mask
            byte[] BitMask = Xor(KeyIV, PasswordHash);
            // Encrypt data with KeyIV
            using (AES128 aes = new AES128(KeyIV))
            {
                byte[] EncryptedData = aes.Encrypt(File.ReadAllBytes(srcFile));
                // Save EncryptedData in desDirectory
                File.WriteAllBytes(desDirectory + Path.GetFileName(srcFile) + ".en", EncryptedData);
                // Save the BitMask
                File.WriteAllBytes(desDirectory + Path.GetFileName(srcFile) + ".bm", BitMask);
            }
        }

        private static void FlexDecrypt(string srcFile, string desDirectory, string password)
        {
            // Get SHA256 Hash of password
            byte[] PasswordHash = SHA256(Encoding.UTF8.GetBytes(password));
            // Read BitMask
            byte[] BitMask = File.ReadAllBytes(Path.GetFileNameWithoutExtension(srcFile) + ".bm");
            // Resolve KeyIV
            byte[] KeyIV = Xor(PasswordHash, BitMask);
            // Decrypt data with KeyIV
            using (AES128 aes = new AES128(KeyIV))
            {
                byte[] DecryptedData = aes.Decrypt(File.ReadAllBytes(srcFile));
                // Save DecryptedData in desDirectory
                File.WriteAllBytes(desDirectory + Path.GetFileNameWithoutExtension(srcFile), DecryptedData);
            }
        }

        private static void FlexChange(string srcFile, string currentPassword, string newPassword)
        {
            // Get SHA256 of current password
            byte[] CrntPassHash = SHA256(Encoding.UTF8.GetBytes(currentPassword));
            // Read current BitMask
            byte[] BitMask = File.ReadAllBytes(Path.GetFileNameWithoutExtension(srcFile) + ".bm");
            // Resolve KeyIV
            byte[] KeyIV = Xor(CrntPassHash, BitMask);
            // Get SHA256 of new password
            byte[] NewPassHash = SHA256(Encoding.UTF8.GetBytes(newPassword));
            // Generate new BitMask
            byte[] NewBitMask = Xor(NewPassHash, KeyIV);
            // Replace/Overwrite old BitMask file
            File.WriteAllBytes(Path.GetDirectoryName(srcFile) + Path.GetFileNameWithoutExtension(srcFile) + ".bm", BitMask);
        }