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X509BasicConstraintsExtension Constructeurs

Définition

Initialise une nouvelle instance de la classe X509BasicConstraintsExtension.

Surcharges

X509BasicConstraintsExtension()

Initialise une nouvelle instance de la classe X509BasicConstraintsExtension.

X509BasicConstraintsExtension(AsnEncodedData, Boolean)

Initialise une nouvelle instance de la classe X509BasicConstraintsExtension à l'aide d'un objet AsnEncodedData et une valeur qui identifie si l'extension est essentielle.

X509BasicConstraintsExtension(Boolean, Boolean, Int32, Boolean)

Initialise une nouvelle instance de la classe X509BasicConstraintsExtension. Les paramètres spécifient une valeur qui indique si un certificat vient d'une autorité de certification, une valeur qui indique si le certificat contient une restriction sur le nombre de niveaux de chemin d'accès qu'il autorise, le nombre de niveaux autorisés dans le chemin d'accès d'un certificat, et une valeur qui indique si l'extension est essentielle.

X509BasicConstraintsExtension()

Initialise une nouvelle instance de la classe X509BasicConstraintsExtension.

public:
 X509BasicConstraintsExtension();
public X509BasicConstraintsExtension ();
Public Sub New ()

Exemples

L’exemple de code suivant montre comment ouvrir le magasin de certificats personnel d’un utilisateur et afficher des informations sur chaque certificat dans le magasin. Cet exemple utilise la X509BasicConstraintsExtension classe pour afficher les informations.

#using <System.dll>
#using <system.security.dll>

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::X509Certificates;
int main()
{
   try
   {
      X509Store^ store = gcnew X509Store( L"MY",StoreLocation::CurrentUser );
      store->Open( static_cast<OpenFlags>(OpenFlags::ReadOnly | OpenFlags::OpenExistingOnly) );
      X509Certificate2Collection^ collection = dynamic_cast<X509Certificate2Collection^>(store->Certificates);
      for ( int i = 0; i < collection->Count; i++ )
      {
         System::Collections::IEnumerator^ myEnum = collection[ i ]->Extensions->GetEnumerator();
         while ( myEnum->MoveNext() )
         {
            X509Extension^ extension = safe_cast<X509Extension^>(myEnum->Current);
            Console::WriteLine( L"{0}({1})", extension->Oid->FriendlyName, extension->Oid->Value );
            if ( extension->Oid->FriendlyName == L"Key Usage" )
            {
               X509KeyUsageExtension^ ext = dynamic_cast<X509KeyUsageExtension^>(extension);
               Console::WriteLine( ext->KeyUsages );
            }
            if ( extension->Oid->FriendlyName == L"Basic Constraints" )
            {
               X509BasicConstraintsExtension^ ext = dynamic_cast<X509BasicConstraintsExtension^>(extension);
               Console::WriteLine( ext->CertificateAuthority );
               Console::WriteLine( ext->HasPathLengthConstraint );
               Console::WriteLine( ext->PathLengthConstraint );
            }
            if ( extension->Oid->FriendlyName == L"Subject Key Identifier" )
            {
               X509SubjectKeyIdentifierExtension^ ext = dynamic_cast<X509SubjectKeyIdentifierExtension^>(extension);
               Console::WriteLine( ext->SubjectKeyIdentifier );
            }
            if ( extension->Oid->FriendlyName == L"Enhanced Key Usage" )
            {
               X509EnhancedKeyUsageExtension^ ext = dynamic_cast<X509EnhancedKeyUsageExtension^>(extension);
               OidCollection^ oids = ext->EnhancedKeyUsages;
               System::Collections::IEnumerator^ myEnum1 = oids->GetEnumerator();
               while ( myEnum1->MoveNext() )
               {
                  Oid^ oid = safe_cast<Oid^>(myEnum1->Current);
                  Console::WriteLine( L"{0}({1})", oid->FriendlyName, oid->Value );
               }
            }
         }

      }
      store->Close();
   }
   catch ( CryptographicException^ ) 
   {
      Console::WriteLine( L"Information could not be written out for this certificate." );
   }

}
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;

public class CertSelect
{
    public static void Main()
    {
        try
        {
            X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
            store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);

            X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
            for (int i = 0; i < collection.Count; i++)
            {
                foreach (X509Extension extension in collection[i].Extensions)
                {
                    Console.WriteLine(extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")");

                    if (extension.Oid.FriendlyName == "Key Usage")
                    {
                        X509KeyUsageExtension ext = (X509KeyUsageExtension)extension;
                        Console.WriteLine(ext.KeyUsages);
                    }

                    if (extension.Oid.FriendlyName == "Basic Constraints")
                    {
                        X509BasicConstraintsExtension ext = (X509BasicConstraintsExtension)extension;
                        Console.WriteLine(ext.CertificateAuthority);
                        Console.WriteLine(ext.HasPathLengthConstraint);
                        Console.WriteLine(ext.PathLengthConstraint);
                    }

                    if (extension.Oid.FriendlyName == "Subject Key Identifier")
                    {
                        X509SubjectKeyIdentifierExtension ext = (X509SubjectKeyIdentifierExtension)extension;
                        Console.WriteLine(ext.SubjectKeyIdentifier);
                    }

                    if (extension.Oid.FriendlyName == "Enhanced Key Usage")
                    {
                        X509EnhancedKeyUsageExtension ext = (X509EnhancedKeyUsageExtension)extension;
                        OidCollection oids = ext.EnhancedKeyUsages;
                        foreach (Oid oid in oids)
                        {
                            Console.WriteLine(oid.FriendlyName + "(" + oid.Value + ")");
                        }
                    }
                }
            }
            store.Close();
        }
        catch (CryptographicException)
        {
            Console.WriteLine("Information could not be written out for this certificate.");
        }
    }
}
Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates



Module CertSelect

    Sub Main()
        Try
            Dim store As New X509Store("MY", StoreLocation.CurrentUser)
            store.Open(OpenFlags.ReadOnly Or OpenFlags.OpenExistingOnly)

            Dim collection As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
            For i As Integer = 0 To collection.Count - 1
                Dim extension As X509Extension
                For Each extension In collection(i).Extensions
                    Console.WriteLine(extension.Oid.FriendlyName + "(" + extension.Oid.Value + ")")


                    If extension.Oid.FriendlyName = "Key Usage" Then
                        Dim ext As X509KeyUsageExtension = CType(extension, X509KeyUsageExtension)
                        Console.WriteLine(ext.KeyUsages)
                    End If

                    If extension.Oid.FriendlyName = "Basic Constraints" Then
                        Dim ext As X509BasicConstraintsExtension = CType(extension, X509BasicConstraintsExtension)
                        Console.WriteLine(ext.CertificateAuthority)
                        Console.WriteLine(ext.HasPathLengthConstraint)
                        Console.WriteLine(ext.PathLengthConstraint)
                    End If

                    If extension.Oid.FriendlyName = "Subject Key Identifier" Then
                        Dim ext As X509SubjectKeyIdentifierExtension = CType(extension, X509SubjectKeyIdentifierExtension)
                        Console.WriteLine(ext.SubjectKeyIdentifier)
                    End If

                    If extension.Oid.FriendlyName = "Enhanced Key Usage" Then
                        Dim ext As X509EnhancedKeyUsageExtension = CType(extension, X509EnhancedKeyUsageExtension)
                        Dim oids As OidCollection = ext.EnhancedKeyUsages
                        Dim oid As Oid
                        For Each oid In oids
                            Console.WriteLine(oid.FriendlyName + "(" + oid.Value + ")")
                        Next oid
                    End If
                Next extension
            Next i
            store.Close()
        Catch
            Console.WriteLine("Information could not be written out for this certificate.")
        End Try

    End Sub
End Module

S’applique à

X509BasicConstraintsExtension(AsnEncodedData, Boolean)

Initialise une nouvelle instance de la classe X509BasicConstraintsExtension à l'aide d'un objet AsnEncodedData et une valeur qui identifie si l'extension est essentielle.

public:
 X509BasicConstraintsExtension(System::Security::Cryptography::AsnEncodedData ^ encodedBasicConstraints, bool critical);
public X509BasicConstraintsExtension (System.Security.Cryptography.AsnEncodedData encodedBasicConstraints, bool critical);
new System.Security.Cryptography.X509Certificates.X509BasicConstraintsExtension : System.Security.Cryptography.AsnEncodedData * bool -> System.Security.Cryptography.X509Certificates.X509BasicConstraintsExtension
Public Sub New (encodedBasicConstraints As AsnEncodedData, critical As Boolean)

Paramètres

encodedBasicConstraints
AsnEncodedData

Données codées à utiliser pour créer l'extension.

critical
Boolean

true si l'extension est essentielle ; sinon, false.

Remarques

Utilisez ce constructeur si les informations permettant de créer une extension se trouvent déjà dans un AsnEncodedData objet.

S’applique à

X509BasicConstraintsExtension(Boolean, Boolean, Int32, Boolean)

Initialise une nouvelle instance de la classe X509BasicConstraintsExtension. Les paramètres spécifient une valeur qui indique si un certificat vient d'une autorité de certification, une valeur qui indique si le certificat contient une restriction sur le nombre de niveaux de chemin d'accès qu'il autorise, le nombre de niveaux autorisés dans le chemin d'accès d'un certificat, et une valeur qui indique si l'extension est essentielle.

public:
 X509BasicConstraintsExtension(bool certificateAuthority, bool hasPathLengthConstraint, int pathLengthConstraint, bool critical);
public X509BasicConstraintsExtension (bool certificateAuthority, bool hasPathLengthConstraint, int pathLengthConstraint, bool critical);
new System.Security.Cryptography.X509Certificates.X509BasicConstraintsExtension : bool * bool * int * bool -> System.Security.Cryptography.X509Certificates.X509BasicConstraintsExtension
Public Sub New (certificateAuthority As Boolean, hasPathLengthConstraint As Boolean, pathLengthConstraint As Integer, critical As Boolean)

Paramètres

certificateAuthority
Boolean

true si le certificat vient d'une autorité de certification, sinon, false.

hasPathLengthConstraint
Boolean

true si le certificat a une restriction sur le nombre de niveaux de chemin d'accès qu'il autorise, sinon, false.

pathLengthConstraint
Int32

Nombre de niveaux autorisés dans le chemin d'accès d'un certificat.

critical
Boolean

true si l'extension est essentielle ; sinon, false.

S’applique à