public static IdToken Parse(string idToken)
{
IdToken idTokenBody = null;
if (!string.IsNullOrWhiteSpace(idToken))
{
string[] idTokenSegments = idToken.Split(new[] { '.' });
// If Id token format is invalid, we silently ignore the id token
if (idTokenSegments.Length == 3)
{
try
{
byte[] idTokenBytes = Base64UrlEncoder.DecodeBytes(idTokenSegments[1]);
using (var stream = new MemoryStream(idTokenBytes))
{
var serializer = new DataContractJsonSerializer(typeof(IdToken));
idTokenBody = (IdToken)serializer.ReadObject(stream);
}
}
catch (SerializationException)
{
// We silently ignore the id token if exception occurs.
}
catch (ArgumentException)
{
// Again, we silently ignore the id token if exception occurs.
}
}
}
return idTokenBody;
}
internal static String DecryptBrokerResponse(String encryptedBrokerResponse)
{
byte[] outputBytes = Base64UrlEncoder.DecodeBytes(encryptedBrokerResponse);
string plaintext = string.Empty;
using (MemoryStream memoryStream = new MemoryStream(outputBytes))
{
byte[] key = GetRawBrokerKey();
AesManaged algo = GetCryptoAlgorithm(key);
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, algo.CreateDecryptor(), CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(cryptoStream))
{
plaintext = srDecrypt.ReadToEnd();
}
}
}
return(plaintext);
}