X509KeyUsageExtension Konstruktoren

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

public:
 X509KeyUsageExtension();

public X509KeyUsageExtension();

Public Sub New ()

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie der persönliche Zertifikatspeicher eines Benutzers geöffnet und Informationen zu den einzelnen Zertifikaten im Speicher angezeigt werden. In diesem Beispiel wird die X509KeyUsageExtension Klasse verwendet, um die Informationen anzuzeigen.

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

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

public:
 X509KeyUsageExtension(System::Security::Cryptography::AsnEncodedData ^ encodedKeyUsage, bool critical);

public X509KeyUsageExtension(System.Security.Cryptography.AsnEncodedData encodedKeyUsage, bool critical);

new System.Security.Cryptography.X509Certificates.X509KeyUsageExtension : System.Security.Cryptography.AsnEncodedData * bool -> System.Security.Cryptography.X509Certificates.X509KeyUsageExtension

Public Sub New (encodedKeyUsage As AsnEncodedData, critical As Boolean)

Parameter

Hinweise

Verwenden Sie diesen Konstruktor, wenn sich die Informationen zum Erstellen der Erweiterung bereits in einem AsnEncodedData Objekt befindet.

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

Quelle:

X509KeyUsageExtension.cs

public:
 X509KeyUsageExtension(System::Security::Cryptography::X509Certificates::X509KeyUsageFlags keyUsages, bool critical);

public X509KeyUsageExtension(System.Security.Cryptography.X509Certificates.X509KeyUsageFlags keyUsages, bool critical);

new System.Security.Cryptography.X509Certificates.X509KeyUsageExtension : System.Security.Cryptography.X509Certificates.X509KeyUsageFlags * bool -> System.Security.Cryptography.X509Certificates.X509KeyUsageExtension

Public Sub New (keyUsages As X509KeyUsageFlags, critical As Boolean)

Parameter