X509EnhancedKeyUsageExtension Konstruktorer

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

public:
 X509EnhancedKeyUsageExtension();

public X509EnhancedKeyUsageExtension();

Public Sub New ()

Exempel

Följande kodexempel visar hur du öppnar en användares personliga certifikatarkiv och visar information om varje certifikat i arkivet. I det X509EnhancedKeyUsageExtension här exemplet används klassen för att visa informationen.

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

Kommentarer

Använd den här metoden för att skapa en ny instans av X509EnhancedKeyUsageExtension klassen. När instansen har skapats kan du sedan använda EnhancedKeyUsages egenskapen för att hämta samlingen av objektidentifierare (OID) som anger de program som använder nyckeln.

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

public:
 X509EnhancedKeyUsageExtension(System::Security::Cryptography::AsnEncodedData ^ encodedEnhancedKeyUsages, bool critical);

public X509EnhancedKeyUsageExtension(System.Security.Cryptography.AsnEncodedData encodedEnhancedKeyUsages, bool critical);

new System.Security.Cryptography.X509Certificates.X509EnhancedKeyUsageExtension : System.Security.Cryptography.AsnEncodedData * bool -> System.Security.Cryptography.X509Certificates.X509EnhancedKeyUsageExtension

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

Parametrar

Kommentarer

Använd den här konstruktorn om informationen för att skapa tillägget redan finns i ett AsnEncodedData objekt.

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

Källa:

X509EnhancedKeyUsageExtension.cs

public:
 X509EnhancedKeyUsageExtension(System::Security::Cryptography::OidCollection ^ enhancedKeyUsages, bool critical);

public X509EnhancedKeyUsageExtension(System.Security.Cryptography.OidCollection enhancedKeyUsages, bool critical);

new System.Security.Cryptography.X509Certificates.X509EnhancedKeyUsageExtension : System.Security.Cryptography.OidCollection * bool -> System.Security.Cryptography.X509Certificates.X509EnhancedKeyUsageExtension

Public Sub New (enhancedKeyUsages As OidCollection, critical As Boolean)

Parametrar

Undantag