The class provides additional context about the underlying transport layer.
Assembly: System (in System.dll)
Thetype exposes the following members.
|Equals(Object)||Determines whether the specified Object is equal to the current Object. (Inherited from Object.)|
|GetChannelBinding||Retrieves the requested channel binding.|
|GetHashCode||Serves as a hash function for a particular type. (Inherited from Object.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|MemberwiseClone||Creates a shallow copy of the current Object. (Inherited from Object.)|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
The class is used with classes in the System.Security.Authentication.ExtendedProtection namespace to provide support for authentication using extended protection for applications.
The design of integrated Windows authentication allows for some credential challenge responses to be universal, meaning they can be re-used or forwarded. If this particular design feature is not needed then the challenge responses should be constructed with, at minimum, target specific information and, at best, also some channel specific information. Services can then provide extended protection to ensure that credential challenge responses contain service specific information (a Service Provider Name or SPN) and, if necessary, channel specific information (a channel binding token or CBT). With this information in the credential exchanges, services are able to better protect against malicious use of credential challenge responses that might have been improperly obtained.
HttpWebRequest is the only class derived from WebRequest class that can potentially use IWA. The FtpWebRequest class does only FTP clear text authentication. The FileWebRequest class doesn't perform any authentication.
There are several ways an application may get a instance. An application that uses SslStream can get the using the TransportContext property. An application that uses HttpWebRequest can get a using the GetRequestStream or EndGetRequestStream methods.
Windows 7, Windows Vista SP1 or later, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later)