RSACryptoServiceProvider 암호화

RSACryptoServiceProvider 암호화

public static string Encrypt(this string target, string key)
{
      if (string.IsNullOrEmpty(target))
          throw new ArgumentException("target null");
      if (string.IsNullOrEmpty(key))
          throw new ArgumentException("key null");

      return BitConverter.ToString(
          new RSACryptoServiceProvider(
              new CspParameters() { KeyContainerName = key }) { PersistKeyInCsp = true }.Encrypt(Encoding.UTF8.GetBytes(target), true
              )
          );
}

public static string Decrypt(this string source, string key)
{
      if (string.IsNullOrEmpty(source))
          throw new ArgumentException("sourcea null");
      if (string.IsNullOrEmpty(key))
          throw new ArgumentException("key null");

      RSACryptoServiceProvider cryptoServiceProvider = new RSACryptoServiceProvider(new CspParameters(){KeyContainerName = key});
      cryptoServiceProvider.PersistKeyInCsp = true;
      byte[] rgb = Array.ConvertAll(
          source.Split(
              new string[1]{"-"}, StringSplitOptions.None), 
              (Converter)(s => Convert.ToByte(byte.Parse(s, NumberStyles.HexNumber)
                  )
              )
          );

      return Encoding.UTF8.GetString(cryptoServiceProvider.Decrypt(rgb, true));
}