The Problem
When calling WSS / SharePoint web services (such as Lists.asmx) via WCF, you will normally get this error if you leave the settings as configured by the “Add Service Reference Wizard” :
“The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The authentication header received from the server was 'NTLM'.”
The Solution
You must specify a non-anonymous impersonation level for your ClientCredentials. Just specifying a username and password for your WCF Service reference's ClientCredentials.UserName.UserName and ClientCredentials.UserName.Password is not sufficient to resolve the problem.
In particular (When SharePoint server is on different domain):
ServiceReference1.ListsSoapClient client = new ServiceReference1.ListsSoapClient();
client.ClientCredentials.Windows.ClientCredential = new System.Net.NetworkCredential("username", "password", "domain");
client.ClientCredentials.Windows.AllowedImpersonationLevel = TokenImpersonationLevel.Identification;
client.GetListCollection();
Of course, when on same domain, don’t have to pass in the Windows.ClientCredential information. You can also set the above values in app.config configuration elements rather than code, but I won't cover that here.
You can use (with descending levels of security):
System.Security.Principal.TokenImpersonationLevel.Identification
System.Security.Principal.TokenImpersonationLevel.Impersonation
System.Security.Principal.TokenImpersonationLevel.Delegation
Details on these impersonation levels can be found at: http://msdn.microsoft.com/en-us/library/system.security.principal.tokenimpersonationlevel.aspx
Config Changes
<configuration>
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="ListsSoap">
<security mode="TransportCredentialOnly">
<transport clientCredentialType="Ntlm" proxyCredentialType="None"
realm="" />
<message clientCredentialType="UserName" algorithmSuite="Default" />
</security>
</binding>
</basicHttpBinding>
<client>
<endpoint address="http://servername/_vti_bin/Lists.asmx"
binding="basicHttpBinding" bindingConfiguration="ListsSoap"
contract="ServiceReference1.ListsSoap" name="ListsSoap1" />
</client>
</system.serviceModel>
</configuration>
81 comments:
I used similar code to call to CRM4.0 service in a different domain, but I still did not make it work. I got message "The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Negotiate,NTLM'.".
Hi David,
You really saved my day today
I used the same security settings NTLM for my web.config file.
it resolved the error which i used to get
The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Negotiate,NTLM'
Thanks David,
You really saved a lot of my time with this post!
Your solution worked for me.
Best regards,
Dmitry
thanks a ton man, saved me from pulling my hair out on this one.
Thanks a million, this really helped me!
Great post! Saved me a lot of time.
Thanks!!
Thanks David, you save my time.
After changing the all it shown following error.
Could not load file or assembly 'Indx.Xhq.Client.Solution, Version=100.38.0.4, Culture=neutral, PublicKeyToken=145342ae5acb8abb' or one of its dependencies. Access is denied.
could you please help out this?
After changing the all it shown following error.
Could not load file or assembly 'Indx.Xhq.Client.Solution, Version=100.38.0.4, Culture=neutral, PublicKeyToken=145342ae5acb8abb' or one of its dependencies. Access is denied.
could you please help out this?
Thank you
You saved a lot of my time. Your blog is really helpful
Saved my time too..
Saved my time too...
You saved my behind, thanks :-)
Still didn't fix it for me :(
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Can I set default cridential programmatically, I use multiple wcf client with NTLM Authentication, so i can set once cridential for all wcf client
Can I set default cridential programmatically, I use multiple wcf client with NTLM Authentication, so i can set once cridential for all wcf client
Can I set default cridential programmatically, I use multiple wcf client with NTLM Authentication, so i can set once cridential for all wcf client
Thanks this helped a lot, I was using basic authentication, so only used the web.config part and provided user Id and Password like this:
MyService client = new Myservice();
client.ClientCredentials.UserName.UserName = @"domain\UserName";
client.ClientCredentials.UserName.Password = "Password";
var response = client.GetCurrentTransmissions("F2FD76FD-5DF7-4915-972D-703C403F932E");
And My web.config looks like this :
"
"
How to call without username and password? But i will use window authentication. Please.
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