X509Chain Classe

Définition

public ref class X509Chain

public ref class X509Chain : IDisposable

public class X509Chain

public class X509Chain : IDisposable

type X509Chain = class

type X509Chain = class
    interface IDisposable

Public Class X509Chain

Public Class X509Chain
Implements IDisposable

Héritage

Object

X509Chain

Implémente

IDisposable

Exemples

L’exemple de code suivant ouvre le magasin de certificats personnel de l’utilisateur actuel, vous permet de sélectionner un certificat, puis d’écrire des informations de certificat et de chaîne de certificats dans la console. La sortie dépend du certificat que vous sélectionnez.

using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.IO;

class TestX509Chain
{
    static void Main(string[] args)
    {
        //Create new X509 store from local certificate store.
        X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
        store.Open(OpenFlags.OpenExistingOnly | OpenFlags.ReadWrite);

        //Output store information.
        Console.WriteLine ("Store Information");
        Console.WriteLine ("Number of certificates in the store: {0}", store.Certificates.Count);
        Console.WriteLine ("Store location: {0}", store.Location);
        Console.WriteLine ("Store name: {0} {1}", store.Name, Environment.NewLine);
    
        //Put certificates from the store into a collection so user can select one.
        X509Certificate2Collection fcollection = (X509Certificate2Collection)store.Certificates;
        X509Certificate2Collection collection = X509Certificate2UI.SelectFromCollection(fcollection, "Select an X509 Certificate", "Choose a certificate to examine.", X509SelectionFlag.SingleSelection);
        X509Certificate2 certificate = collection[0];
        X509Certificate2UI.DisplayCertificate(certificate);

        //Output chain information of the selected certificate.
        X509Chain ch = new X509Chain();
        ch.ChainPolicy.RevocationMode = X509RevocationMode.Online;
        ch.Build (certificate);
        Console.WriteLine ("Chain Information");
        Console.WriteLine ("Chain revocation flag: {0}", ch.ChainPolicy.RevocationFlag);
        Console.WriteLine ("Chain revocation mode: {0}", ch.ChainPolicy.RevocationMode);
        Console.WriteLine ("Chain verification flag: {0}", ch.ChainPolicy.VerificationFlags);
        Console.WriteLine ("Chain verification time: {0}", ch.ChainPolicy.VerificationTime);
        Console.WriteLine ("Chain status length: {0}", ch.ChainStatus.Length);
        Console.WriteLine ("Chain application policy count: {0}", ch.ChainPolicy.ApplicationPolicy.Count);
        Console.WriteLine ("Chain certificate policy count: {0} {1}", ch.ChainPolicy.CertificatePolicy.Count, Environment.NewLine);

        //Output chain element information.
        Console.WriteLine ("Chain Element Information");
        Console.WriteLine ("Number of chain elements: {0}", ch.ChainElements.Count);
        Console.WriteLine ("Chain elements synchronized? {0} {1}", ch.ChainElements.IsSynchronized, Environment.NewLine);
    
        foreach (X509ChainElement element in ch.ChainElements)
        {
            Console.WriteLine ("Element issuer name: {0}", element.Certificate.Issuer);
            Console.WriteLine ("Element certificate valid until: {0}", element.Certificate.NotAfter);
            Console.WriteLine ("Element certificate is valid: {0}", element.Certificate.Verify ());
            Console.WriteLine ("Element error status length: {0}", element.ChainElementStatus.Length);
            Console.WriteLine ("Element information: {0}", element.Information);
            Console.WriteLine ("Number of element extensions: {0}{1}", element.Certificate.Extensions.Count, Environment.NewLine);

            if (ch.ChainStatus.Length > 1)
            {
                for (int index = 0; index < element.ChainElementStatus.Length; index++)
                {
                    Console.WriteLine (element.ChainElementStatus[index].Status);
                    Console.WriteLine (element.ChainElementStatus[index].StatusInformation);
                }
            }
        }
        store.Close();
    }
}

Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates
Imports System.IO

Class TestX509Chain

    Shared Sub Main(ByVal args() As String)
        'Create new X509 store from local certificate store.
        Dim store As New X509Store("MY", StoreLocation.CurrentUser)
        store.Open(OpenFlags.OpenExistingOnly Or OpenFlags.ReadWrite)

        'Output store information.
        Console.WriteLine("Store Information")
        Console.WriteLine("Number of certificates in the store: {0}", store.Certificates.Count)
        Console.WriteLine("Store location: {0}", store.Location)
        Console.WriteLine("Store name: {0} {1}", store.Name, Environment.NewLine)

        'Put certificates from the store into a collection so user can select one.
        Dim fcollection As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
        Dim collection As X509Certificate2Collection = X509Certificate2UI.SelectFromCollection(fcollection, "Select an X509 Certificate", "Choose a certificate to examine.", X509SelectionFlag.SingleSelection)
        Dim certificate As X509Certificate2 = collection(0)
        X509Certificate2UI.DisplayCertificate(certificate)

        'Output chain information of the selected certificate.
        Dim ch As New X509Chain()
        ch.ChainPolicy.RevocationMode = X509RevocationMode.Online
        ch.Build(certificate)
        Console.WriteLine("Chain Information")
        Console.WriteLine("Chain revocation flag: {0}", ch.ChainPolicy.RevocationFlag)
        Console.WriteLine("Chain revocation mode: {0}", ch.ChainPolicy.RevocationMode)
        Console.WriteLine("Chain verification flag: {0}", ch.ChainPolicy.VerificationFlags)
        Console.WriteLine("Chain verification time: {0}", ch.ChainPolicy.VerificationTime)
        Console.WriteLine("Chain status length: {0}", ch.ChainStatus.Length)
        Console.WriteLine("Chain application policy count: {0}", ch.ChainPolicy.ApplicationPolicy.Count)
        Console.WriteLine("Chain certificate policy count: {0} {1}", ch.ChainPolicy.CertificatePolicy.Count, Environment.NewLine)

        'Output chain element information.
        Console.WriteLine("Chain Element Information")
        Console.WriteLine("Number of chain elements: {0}", ch.ChainElements.Count)
        Console.WriteLine("Chain elements synchronized? {0} {1}", ch.ChainElements.IsSynchronized, Environment.NewLine)

        Dim element As X509ChainElement
        For Each element In ch.ChainElements
            Console.WriteLine("Element issuer name: {0}", element.Certificate.Issuer)
            Console.WriteLine("Element certificate valid until: {0}", element.Certificate.NotAfter)
            Console.WriteLine("Element certificate is valid: {0}", element.Certificate.Verify())
            Console.WriteLine("Element error status length: {0}", element.ChainElementStatus.Length)
            Console.WriteLine("Element information: {0}", element.Information)
            Console.WriteLine("Number of element extensions: {0}{1}", element.Certificate.Extensions.Count, Environment.NewLine)

            If ch.ChainStatus.Length > 1 Then
                Dim index As Integer
                For index = 0 To element.ChainElementStatus.Length
                    Console.WriteLine(element.ChainElementStatus(index).Status)
                    Console.WriteLine(element.ChainElementStatus(index).StatusInformation)
                Next index
            End If
        Next element
        store.Close()
    End Sub
End Class

Remarques

L’objet X509Chain a un état d’erreur global appelé ChainStatus qui doit être utilisé pour la validation de certificat. Les règles régissant la validation de certificat sont complexes et il est facile de sursimplifier la logique de validation en ignorant l’état d’erreur d’un ou plusieurs des éléments impliqués. L’état d’erreur global prend en compte l’état de chaque élément de la chaîne.

Lors de la X509Chainsuppression, les certificats dans ChainElements ne sont pas supprimés. Vous devez supprimer les certificats de cette collection lorsque les instances de certificat ne sont plus nécessaires.