protected override async Task <HttpResponseMessage> SendAsync(
HttpRequestMessage request,
CancellationToken cancellationToken)
{
if (Logging.IsEnabled)
{
Logging.Enter(this, $"{request.RequestUri}", nameof(SendAsync));
}
HttpResponseMessage response = await base.SendAsync(request, cancellationToken).ConfigureAwait(false);
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
#if NET5_0_OR_GREATER
if (request.Options.TryGetValue(new HttpRequestOptionsKey <object>(ProvisioningHeaderName), out object result))
#else
if (request.Properties.TryGetValue(ProvisioningHeaderName, out object result))
#endif
{
if (result is Action <string> setSasToken)
{
string target = GetTarget(request.RequestUri.LocalPath);
string responseContent = await response.Content.ReadHttpContentAsStringAsync(cancellationToken).ConfigureAwait(false);
TpmChallenge challenge = JsonConvert.DeserializeObject <TpmChallenge>(responseContent);
string sasToken = ProvisioningSasBuilder.ExtractServiceAuthKey(
_securityProvider,
target,
Convert.FromBase64String(challenge.AuthenticationKey));
setSasToken(sasToken);
if (Logging.IsEnabled)
{
Logging.Info(this, $"Authorization challenge. Retrying with Token:{sasToken}");
}
response = await base.SendAsync(request, cancellationToken).ConfigureAwait(false);
}
}
}
if (Logging.IsEnabled)
{
Logging.Exit(this, $"{request.RequestUri}", nameof(SendAsync));
}
return(response);
}
private void SendLastResponse()
{
string sas = ProvisioningSasBuilder.ExtractServiceAuthKey(
_security,
_hostName,
_nonceBuffer);
byte[] responseBuffer = new byte[sas.Length + 1];
responseBuffer[0] = 0x0;
Buffer.BlockCopy(Encoding.UTF8.GetBytes(sas), 0, responseBuffer, 1, sas.Length);
var response = new SaslResponse {
Response = new ArraySegment <byte>(responseBuffer)
};
Negotiator.WriteFrame(response, true);
}
