private static async Task <HttpResponseMessage> SendWithNtAuthAsync(HttpRequestMessage request, Uri authUri, ICredentials credentials, bool isProxyAuth, HttpConnection connection, CancellationToken cancellationToken)
{
HttpResponseMessage response = await InnerSendAsync(request, isProxyAuth, connection, cancellationToken).ConfigureAwait(false);
if (!isProxyAuth && connection.Kind == HttpConnectionKind.Proxy && !ProxySupportsConnectionAuth(response))
{
// Proxy didn't indicate that it supports connection-based auth, so we can't proceed.
if (NetEventSource.IsEnabled)
{
NetEventSource.Error(connection, $"Proxy doesn't support connection-based auth, uri={authUri}");
}
return(response);
}
if (TryGetAuthenticationChallenge(response, isProxyAuth, authUri, credentials, out AuthenticationChallenge challenge))
{
if (challenge.AuthenticationType == AuthenticationType.Negotiate ||
challenge.AuthenticationType == AuthenticationType.Ntlm)
{
string challengeData = challenge.ChallengeData;
string spn = "HTTP/" + authUri.IdnHost;
ChannelBinding channelBinding = connection.TransportContext?.GetChannelBinding(ChannelBindingKind.Endpoint);
NTAuthentication authContext = new NTAuthentication(isServer: false, challenge.SchemeName, challenge.Credential, spn, ContextFlagsPal.Connection, channelBinding);
try
{
while (true)
{
string challengeResponse = authContext.GetOutgoingBlob(challengeData);
if (challengeResponse == null)
{
// Response indicated denial even after login, so stop processing and return current response.
break;
}
await connection.DrainResponseAsync(response).ConfigureAwait(false);
SetRequestAuthenticationHeaderValue(request, new AuthenticationHeaderValue(challenge.SchemeName, challengeResponse), isProxyAuth);
response = await InnerSendAsync(request, isProxyAuth, connection, cancellationToken).ConfigureAwait(false);
if (authContext.IsCompleted || !TryGetRepeatedChallenge(response, challenge.SchemeName, isProxyAuth, out challengeData))
{
break;
}
}
}
finally
{
authContext.CloseContext();
}
}
}
return(response);
}
private static async Task <HttpResponseMessage> SendWithNtAuthAsync(HttpRequestMessage request, Uri authUri, ICredentials credentials, bool isProxyAuth, HttpConnection connection, CancellationToken cancellationToken)
{
HttpResponseMessage response = await InnerSendAsync(request, isProxyAuth, connection, cancellationToken).ConfigureAwait(false);
if (TryGetAuthenticationChallenge(response, isProxyAuth, authUri, credentials, out AuthenticationChallenge challenge) &&
(!isProxyAuth || CheckIfProxySupportsConnectionAuth(response)))
{
if (challenge.AuthenticationType == AuthenticationType.Negotiate ||
challenge.AuthenticationType == AuthenticationType.Ntlm)
{
string challengeData = challenge.ChallengeData;
string spn = "HTTP/" + authUri.IdnHost;
ChannelBinding channelBinding = connection.TransportContext?.GetChannelBinding(ChannelBindingKind.Endpoint);
NTAuthentication authContext = new NTAuthentication(false, challenge.SchemeName, challenge.Credential, spn, ContextFlagsPal.Connection, channelBinding);
try
{
while (true)
{
string challengeResponse = authContext.GetOutgoingBlob(challengeData);
if (authContext.IsCompleted)
{
break;
}
await connection.DrainResponseAsync(response).ConfigureAwait(false);
SetRequestAuthenticationHeaderValue(request, new AuthenticationHeaderValue(challenge.SchemeName, challengeResponse), isProxyAuth);
response = await InnerSendAsync(request, isProxyAuth, connection, cancellationToken).ConfigureAwait(false);
if (!TryGetRepeatedChallenge(response, challenge.SchemeName, isProxyAuth, out challengeData))
{
break;
}
}
}
finally
{
authContext.CloseContext();
}
}
}
return(response);
}
private static async Task <HttpResponseMessage> SendWithNtAuthAsync(HttpRequestMessage request, Uri authUri, ICredentials credentials, bool isProxyAuth, HttpConnection connection, HttpConnectionPool connectionPool, CancellationToken cancellationToken)
{
HttpResponseMessage response = await InnerSendAsync(request, isProxyAuth, connectionPool, connection, cancellationToken).ConfigureAwait(false);
if (!isProxyAuth && connection.Kind == HttpConnectionKind.Proxy && !ProxySupportsConnectionAuth(response))
{
// Proxy didn't indicate that it supports connection-based auth, so we can't proceed.
if (NetEventSource.IsEnabled)
{
NetEventSource.Error(connection, $"Proxy doesn't support connection-based auth, uri={authUri}");
}
return(response);
}
if (TryGetAuthenticationChallenge(response, isProxyAuth, authUri, credentials, out AuthenticationChallenge challenge))
{
if (challenge.AuthenticationType == AuthenticationType.Negotiate ||
challenge.AuthenticationType == AuthenticationType.Ntlm)
{
bool isNewConnection = false;
bool needDrain = true;
try
{
if (response.Headers.ConnectionClose.GetValueOrDefault())
{
// Server is closing the connection and asking us to authenticate on a new connection.
(connection, response) = await connectionPool.CreateHttp11ConnectionAsync(request, cancellationToken).ConfigureAwait(false);
if (response != null)
{
return(response);
}
connectionPool.IncrementConnectionCount();
connection.Acquire();
isNewConnection = true;
needDrain = false;
}
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(connection, $"Authentication: {challenge.AuthenticationType}, Uri: {authUri.AbsoluteUri.ToString()}");
}
// Calculate SPN (Service Principal Name) using the host name of the request.
// Use the request's 'Host' header if available. Otherwise, use the request uri.
// Ignore the 'Host' header if this is proxy authentication since we need to use
// the host name of the proxy itself for SPN calculation.
string hostName;
if (!isProxyAuth && request.HasHeaders && request.Headers.Host != null)
{
// Use the host name without any normalization.
hostName = request.Headers.Host;
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(connection, $"Authentication: {challenge.AuthenticationType}, Host: {hostName}");
}
}
else
{
// Need to use FQDN normalized host so that CNAME's are traversed.
// Use DNS to do the forward lookup to an A (host) record.
// But skip DNS lookup on IP literals. Otherwise, we would end up
// doing an unintended reverse DNS lookup.
UriHostNameType hnt = authUri.HostNameType;
if (hnt == UriHostNameType.IPv6 || hnt == UriHostNameType.IPv4)
{
hostName = authUri.IdnHost;
}
else
{
IPHostEntry result = await Dns.GetHostEntryAsync(authUri.IdnHost).ConfigureAwait(false);
hostName = result.HostName;
}
}
string spn = "HTTP/" + hostName;
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(connection, $"Authentication: {challenge.AuthenticationType}, SPN: {spn}");
}
ChannelBinding channelBinding = connection.TransportContext?.GetChannelBinding(ChannelBindingKind.Endpoint);
NTAuthentication authContext = new NTAuthentication(isServer: false, challenge.SchemeName, challenge.Credential, spn, ContextFlagsPal.Connection, channelBinding);
string challengeData = challenge.ChallengeData;
try
{
while (true)
{
string challengeResponse = authContext.GetOutgoingBlob(challengeData);
if (challengeResponse == null)
{
// Response indicated denial even after login, so stop processing and return current response.
break;
}
if (needDrain)
{
await connection.DrainResponseAsync(response).ConfigureAwait(false);
}
SetRequestAuthenticationHeaderValue(request, new AuthenticationHeaderValue(challenge.SchemeName, challengeResponse), isProxyAuth);
response = await InnerSendAsync(request, isProxyAuth, connectionPool, connection, cancellationToken).ConfigureAwait(false);
if (authContext.IsCompleted || !TryGetRepeatedChallenge(response, challenge.SchemeName, isProxyAuth, out challengeData))
{
break;
}
needDrain = true;
}
}
finally
{
authContext.CloseContext();
}
}
finally
{
if (isNewConnection)
{
connection.Release();
}
}
}
}
return(response);
}
