Validates an X.509 certificate.
Namespace:
System.IdentityModel.Selectors
Assembly:
System.IdentityModel (in System.IdentityModel.dll)
Visual Basic (Declaration)
Public MustInherit Class X509CertificateValidator
Dim instance As X509CertificateValidator
public abstract class X509CertificateValidator
public ref class X509CertificateValidator abstract
public abstract class X509CertificateValidator
Use the X509CertificateValidator class to specify how an X.509 certificate is deemed valid. This can be done using by deriving a class from X509CertificateValidator and overriding the Validate method.
Public Class MyX509CertificateValidator
Inherits X509CertificateValidator
Private allowedIssuerName As String
Public Sub New(ByVal allowedIssuerName As String)
If allowedIssuerName Is Nothing Then
Throw New ArgumentNullException("allowedIssuerName")
End If
Me.allowedIssuerName = allowedIssuerName
End Sub 'New
Public Overrides Sub Validate(ByVal certificate As X509Certificate2)
' Check that there is a certificate.
If certificate Is Nothing Then
Throw New ArgumentNullException("certificate")
End If
' Check that the certificate issuer matches the configured issuer
If allowedIssuerName <> certificate.IssuerName.Name Then
Throw New SecurityTokenValidationException("Certificate was not issued by a trusted issuer")
End If
End Sub 'Validate
End Class 'MyX509CertificateValidator
public class MyX509CertificateValidator : X509CertificateValidator
{
string allowedIssuerName;
public MyX509CertificateValidator(string allowedIssuerName)
{
if (allowedIssuerName == null)
{
throw new ArgumentNullException("allowedIssuerName");
}
this.allowedIssuerName = allowedIssuerName;
}
public override void Validate(X509Certificate2 certificate)
{
// Check that there is a certificate.
if (certificate == null)
{
throw new ArgumentNullException("certificate");
}
// Check that the certificate issuer matches the configured issuer
if (allowedIssuerName != certificate.IssuerName.Name)
{
throw new SecurityTokenValidationException
("Certificate was not issued by a trusted issuer");
}
}
}
System..::.Object
System.IdentityModel.Selectors..::.X509CertificateValidator
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0
Reference