SslStream.BeginAuthenticateAsClient Method (String, AsyncCallback, Object)
Called by clients to begin an asynchronous operation to authenticate the server and optionally the client.
Assembly: System (in System.dll)
[HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading = true)] public virtual IAsyncResult BeginAuthenticateAsClient( string targetHost, AsyncCallback asyncCallback, Object asyncState )
- Type: System.AsyncCallback
An AsyncCallback delegate that references the method to invoke when the authentication is complete.
- Type: System.Object
A user-defined object that contains information about the operation. This object is passed to the asyncCallback delegate when the operation completes.
targetHost is null.
The authentication failed and left this object in an unusable state.
Authentication has already occurred.
Server authentication using this SslStream was tried previously.
Authentication is already in progress.
This object has been closed.
This method authenticates using the SslProtocols value set to Default. This value specifies that either Secure Sockets Layer (SSL) 3.0 or Transport Layer Security (TLS) 1.0 are acceptable for secure communications. TLS 1.1 or TLS 1.2 will not be used even if those protocols are enabled on local computer. No client certificates are used in the authentication. The certificate revocation list is not checked during authentication.
The value specified for targetHost must match the name on the server's certificate.
The asynchronous authentication operation must be completed by calling the EndAuthenticateAsClient method. Typically, the method is invoked by the asyncCallback delegate.
This method does not block while the operation completes. To block until the operation completes, use one of the AuthenticateAsClient method overloads.
For detailed information about using the asynchronous programming model, see Calling Synchronous Methods Asynchronously
The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: ExternalThreading. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2