RemoteCertificateValidationCallback Delegate

Verifies the remote Secure Sockets Layer (SSL) certificate used for authentication.

Namespace:  System.Net.Security
Assembly:  System (in System.dll)

type RemoteCertificateValidationCallback = 
    delegate of  
        sender:Object * 
        certificate:X509Certificate * 
        chain:X509Chain * 
        sslPolicyErrors:SslPolicyErrors -> bool

Parameters

sender
Type: System.Object

An object that contains state information for this validation.

certificate
Type: System.Security.Cryptography.X509Certificates.X509Certificate

The certificate used to authenticate the remote party.

chain
Type: System.Security.Cryptography.X509Certificates.X509Chain

The chain of certificate authorities associated with the remote certificate.

sslPolicyErrors
Type: System.Net.Security.SslPolicyErrors

One or more errors associated with the remote certificate.

Return Value

Type: System.Boolean
A Boolean value that determines whether the specified certificate is accepted for authentication.

The delegate's sslPolicyErrors argument contains any certificate errors returned by SSPI while authenticating the client or server. The Boolean value returned by the method invoked by this delegate determines whether the authentication is allowed to succeed.

This delegate is used with the SslStream class.

The following code example implements a method that is invoked by an instance of the RemoteCertificateValidationCallback class. If there are validation errors, this method displays them and returns false, which prevents communication with the unauthenticated server.

No code example is currently available or this language may not be supported.

The following code example creates the delegate using the method defined in the preceding code example.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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