/// <summary>
/// Decrypt an encrypted text.
/// </summary>
/// <param name="encryptedText">The encrypted text.</param>
/// <param name="options">The decryption options.</param>
/// <returns>Returns a decrypted text.</returns>
public static string Decrypt(string encryptedText, IDictionary <string, object> options)
{
var toDecrypt = encryptedText;
var decryptedText = string.Empty;
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
var decodeFromBase64 = options.ContainsKey("DecodeFromBase64") &&
Convert.ToBoolean(options["DecodeFromBase64"], CultureInfo.InvariantCulture);
var encodeToBase64 = options.ContainsKey("EncodeToBase64") && Convert.ToBoolean(options["EncodeToBase64"], CultureInfo.InvariantCulture);
var method = options.ContainsKey("Method") ? options["Method"].ToString() : string.Empty;
switch (method)
{
// RSA
case "RSA":
var privateKeyPath = options["PrivateKeyPath"].ToString();
if (privateKeyPath.StartsWith("\"", StringComparison.InvariantCulture))
{
privateKeyPath = privateKeyPath.Substring(1, privateKeyPath.Length - 1);
}
if (privateKeyPath.EndsWith("\"", StringComparison.InvariantCulture))
{
privateKeyPath = privateKeyPath.Substring(0, privateKeyPath.Length - 1);
}
decryptedText = decodeFromBase64 ? RsaUtils.Base64DecodeAndDecrypt(toDecrypt, privateKeyPath) : RsaUtils.Decrypt(toDecrypt, privateKeyPath);
break;
// AES
case "AES":
var key = options["key"].ToString();
var initializationValue = options["iniValue"].ToString();
decryptedText = decodeFromBase64 ? AesUtils.Base64DecodeAndDecrypt(toDecrypt, key, initializationValue) : AesUtils.Decrypt(toDecrypt, key, initializationValue);
break;
// Base64
case "Base64":
decryptedText = GeneralUtils.Base64Decode(toDecrypt);
break;
}
return(encodeToBase64 ? GeneralUtils.Base64Encode(decryptedText) : decryptedText);
}
