public async Task <FirebaseAccessToken> Send2LOTokenRequestAsync()
{
var jwtPayload = _jwtPayload.GetPayload();
var rsaParams = _serviceAccountCredentials.GetRSAParams();
string jwtToken;
using (var rsa = new RSACryptoServiceProvider())
{
rsa.ImportParameters(rsaParams);
jwtToken = _firebaseConfig.JwtTokenProvider.Encode(jwtPayload, rsa);
}
var permissionPayload = new PermissionAuthPayloadGenerator(jwtToken).GetPayload();
var urlEncodedPayload = new FormUrlEncodedContent(permissionPayload);
HttpResponseMessage response = await PostAsync(_firebaseConfig.GoogleOAuthTokenPath, urlEncodedPayload);
await response.EnsureSuccessStatusCodeAsync();
if (response.Content == null)
{
throw new FirebaseHttpException("Authentication failed, empty response content from firebase server");
}
var strinRepresentation = await response.Content.ReadAsStringAsync();
var serializationSettings = new JsonSerializerSettings()
{
ContractResolver = new FirebaseAccessTokenContractResolver()
};
_accessToken = JsonConvert.DeserializeObject <FirebaseAccessToken>(strinRepresentation, serializationSettings);
if (_accessToken == null)
{
throw new FirebaseHttpException("Authentication failed, unsupported content type was returned from firebase server");
}
return(_accessToken);
}
private string EncryptPayload(string signingPayloadAsString)
{
var encryptedBase64String = String.Empty;
UTF8Encoding byteConverter = new UTF8Encoding();
var payloadBytes = byteConverter.GetBytes(signingPayloadAsString);
using (var rsa = new RSACryptoServiceProvider())
{
rsa.ImportParameters(_credentials.GetRSAParams());
var encrypt = rsa.SignData(payloadBytes, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
encryptedBase64String = Convert.ToBase64String(encrypt);
}
return(encryptedBase64String);
}
