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IssuedTokenServiceCredential.CustomCertificateValidator Property

Gets or sets a custom X.509 certificate validator.

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

public X509CertificateValidator CustomCertificateValidator { get; set; }

Property Value

Type: System.IdentityModel.Selectors.X509CertificateValidator
A custom X.509 certificate validator.

The following code shows one way to access and set this property.

serviceHost.Credentials.ClientCertificate.Authentication.CertificateValidationMode =
serviceHost.Credentials.ClientCertificate.Authentication.CustomCertificateValidator =
    new MyX509CertificateValidator("CN=Contoso.com");

The custom validator referenced in the prior code is defined in the following code.

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");

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.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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