NegotiateStream::AuthenticateAsServerAsync Method ()
Called by servers to authenticate the client, and optionally the server, in a client-server connection as an asynchronous operation.
Assembly: System (in System.dll)
| Exception | Condition |
|---|---|
| AuthenticationException | The authentication failed. You can use this object to retry the authentication. |
| InvalidCredentialException | The authentication failed. You can use this object to retry the authentication. |
| ObjectDisposedException | This object has been closed. |
| NotSupportedException | Windows 95 and Windows 98 are not supported. |
The authentication uses the server's DefaultCredentials. No Service Principal Name (SPN) is specified for the server. The impersonation level is Identification, and the security level is EncryptAndSign.
When authentication succeeds, you must check the IsEncrypted and IsSigned properties to determine what security services are used by the NegotiateStream. Check the IsMutuallyAuthenticated property to determine whether mutual authentication occurred.
If the authentication fails, you receive an AuthenticationException or an InvalidCredentialException. In this case, you can retry the authentication with a different credential.
to use the explicit System.Net::NetworkCredential. Associated enumeration: SecurityPermissionFlag::ControlPrincipal.
Available since 4.5