/// <summary> /// Encrypteds the file. /// </summary> /// <param name="filePath">The file path.</param> /// <returns></returns> public static void EncryptedFile(string filePath) { if (!File.Exists(filePath)) { throw new FileNotFoundException(); } var fileName = Path.GetFileName(filePath); var cryptoKey = CaesarEncryptionAlgorithm.GenerateEncryptoKey(fileName, -3); var outputFileName = string.Concat("E", fileName); EncryptFile(filePath, outputFileName, cryptoKey); }
/// <summary> /// Decrypteds the file. /// </summary> /// <param name="filePath">The file path.</param> /// <exception cref="FileNotFoundException">filePath /// or /// EncryptedFileNotFound</exception> public static void DecryptedFile(string filePath) { if (!File.Exists(filePath)) { throw new FileNotFoundException(nameof(filePath)); } var fileName = Path.GetFileName(filePath); if (!fileName.StartsWith("E")) { throw new FileNotFoundException("EncryptedFileNotFound"); } var originalFileName = fileName.Substring(1, fileName.Length - 1); var chryptoKey = CaesarEncryptionAlgorithm.GenerateEncryptoKey(originalFileName, -3); var outputFileName = string.Concat("D", originalFileName); DecryptFile(filePath, outputFileName, chryptoKey); }