MessageSecurityOverHttp.NegotiateServiceCredential Property


Gets or sets a value that indicates whether the service credential is provisioned at the client out of band or is obtained from the service through a process of negotiation.

 property bool NegotiateServiceCredential { bool get(); void set(bool value); };
public bool NegotiateServiceCredential { get; set; }
member this.NegotiateServiceCredential : bool with get, set
Public Property NegotiateServiceCredential As Boolean

Property Value

true if service credential is obtained through a process of negotiation; otherwise, false. The default is true.


The following code shows how to access and set this property.

WSHttpBinding binding = new WSHttpBinding();
binding.Security.Mode = SecurityMode.Message;
binding.Security.Message.ClientCredentialType =
binding.Security.Message.NegotiateServiceCredential = false;

CalculatorClient CalculatorClient = new CalculatorClient("myBinding");
    SetDefaultCertificate("Al", StoreLocation.CurrentUser, StoreName.My);
Dim binding As New WSHttpBinding()
binding.Security.Mode = SecurityMode.Message
binding.Security.Message.ClientCredentialType = _
binding.Security.Message.NegotiateServiceCredential = False

Dim CalculatorClient As New CalculatorClient("myBinding")
CalculatorClient.ClientCredentials.ServiceCertificate. _
    SetDefaultCertificate("Al", StoreLocation.CurrentUser, StoreName.My)


Setting this property to true, requires WS-Trust and WS-SecureConversation to be supported by the client and the service. Setting this property to false does not require WS-Trust or WS-SecureConversation to be supported.

For Anonymous, Username or Certificate client credential types, setting this property to false implies that the service certificate must be available at the client out of band and that the client must specify the service's certificate to use.

In the case of Windows credentials, setting this property to false causes an authentication based on KerberosToken. This requires that the client and service be part of a Kerberos domain. This mode is interoperable with SOAP stacks that implement the Kerberos token profile from OASIS. Setting this property to true causes a SOAP negotiation that tunnels SPNego exchange over SOAP messages. This mode is not interoperable.

This property indicates whether the service credential is negotiated automatically between the client and the service. If this property is true, then such negotiation occurs. If this property is false, then the service credentials must be specified at the client before communication with the service can occur.

If this property is set to false, and the binding is configured to use Windows as a client credential type, the service account must be associated with a Service Principal Name (SPN). To do this, run the service under the NETWORK SERVICE account, or LOCAL SYSTEM account. Alternatively, use the SetSpn.exe tool to create an SPN for the service account. In either case, the client must use the correct SPN in the <servicePrincipalName> element, or by using the EndpointAddress constructor. For more information, see Service Identity and Authentication.

Applies to