Quando estou tentando usarWindows.Security.Cryptography.Core na UWP, sempre recebo um erro ao importar a chave pública deAsymmetricKeyAlgorithmProvider. Eu tentei todas as combinações sem sucesso. Eu sempre verifiquei se a string de entrada estava no modo UTF8.

try {
  var bytes = Encoding.UTF8.GetBytes(publicKeyString);
  publicKeyString = Encoding.UTF8.GetString(bytes);

  Debug.WriteLine(publicKeyString);
  IBuffer keyBuffer = CryptographicBuffer.DecodeFromBase64String(publicKeyString);

  byte[] bytes = Convert.FromBase64String(publicKeyString);
  string hex = "2D2D2D2D2D424547494E205055424C4943204B45592D2D2D2D2D0A4D494942496A414E42676B71686B6947397730424151454641414F43415138414D49494243674B434151454172336767514744726E5645562B786A4F484F2B390A4B72595541547166756935666F364D65736E53466C6B797937482F4775327135667273724B305246383933507A584F664371414A6753534D58673330793463720A594E3742617838467979314C58744E2B5A35576B43436D644F597438704F636D7A75494D6A636E4E733063486B767859576B336658516D513255535A685063700A51595761382F4469392B344462745464587A643263346F717A4E4A4A4A4B66437A647731796E72776F4A755A4245563547747363396F48782F6D7231725434420A386F377635473553706D543368687661396762617034436C4231745677434B584F41636A2F71782F49416A505A35566E4B7A363669325534706A6F43764A79590A564E53497A3557346276726A6E622B76775848626B506D62316E6655503864526D33683767644F314D7330766B72715A4567714746416953343475686974576B0A65514944415141420A2D2D2D2D2D454E44205055424C4943204B45592D2D2D2D2D0A";

  Debug.WriteLine(hex);
  AsymmetricKeyAlgorithmProvider provider = AsymmetricKeyAlgorithmProvider.OpenAlgorithm(AsymmetricAlgorithmNames.RsaPkcs1);
  CryptographicKey publicKey = provider.ImportPublicKey(CryptographicBuffer.DecodeFromHexString(hex), CryptographicPublicKeyBlobType.BCryptPublicKey);
  IBuffer dataBuffer = CryptographicBuffer.CreateFromByteArray(Encoding.UTF8.GetBytes(plainText));
  var encryptedData = CryptographicEngine.Encrypt(publicKey, dataBuffer, null);

  return CryptographicBuffer.EncodeToBase64String(encryptedData);
}
catch (Exception e)
{
  throw;
  return "Error in Encryption:With RSA ";        
}