X509EnhancedKeyUsageExtension 建構函式

參考

定義

命名空間:: System.Security.Cryptography.X509Certificates

組件:: System.Security.Cryptography.X509Certificates.dll

組件:: System.Security.Cryptography.dll

組件:: System.dll

組件:: netstandard.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

初始化 X509EnhancedKeyUsageExtension 類別的新執行個體。

多載

X509EnhancedKeyUsageExtension()	初始化 X509EnhancedKeyUsageExtension 類別的新執行個體。
X509EnhancedKeyUsageExtension(AsnEncodedData, Boolean)	使用 X509EnhancedKeyUsageExtension 物件和識別擴充功能是否重要的值，初始化 AsnEncodedData 類別的新執行個體。
X509EnhancedKeyUsageExtension(OidCollection, Boolean)	使用 X509EnhancedKeyUsageExtension 和識別擴充功能是否重要的值，初始化 OidCollection 類別的新執行個體。

X509EnhancedKeyUsageExtension()

來源:: X509EnhancedKeyUsageExtension.cs

來源:: X509EnhancedKeyUsageExtension.cs

來源:: X509EnhancedKeyUsageExtension.cs

初始化 X509EnhancedKeyUsageExtension 類別的新執行個體。

public:
 X509EnhancedKeyUsageExtension();

public X509EnhancedKeyUsageExtension ();

Public Sub New ()

範例

下列程式碼範例示範如何開啟使用者的個人憑證存儲，以及顯示存放區中每個憑證的相關資訊。這個範例會 X509EnhancedKeyUsageExtension 使用類別來顯示資訊。

#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

備註

使用這個方法來建立類別的新實例 X509EnhancedKeyUsageExtension 。建立實例之後，您就可以使用 EnhancedKeyUsages 屬性來取得物件識別碼的集合， (OID) ，指出使用金鑰的應用程式。

適用於

X509EnhancedKeyUsageExtension(AsnEncodedData, Boolean)

來源:: X509EnhancedKeyUsageExtension.cs

來源:: X509EnhancedKeyUsageExtension.cs

來源:: X509EnhancedKeyUsageExtension.cs

使用 X509EnhancedKeyUsageExtension 物件和識別擴充功能是否重要的值，初始化 AsnEncodedData 類別的新執行個體。

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)

參數

encodedEnhancedKeyUsages: AsnEncodedData

用來建立擴充功能的編碼資料。

critical: Boolean

如果是關鍵擴充功能則為 true，否則為 false。

備註

如果建立延伸模組的資訊已經在物件中 AsnEncodedData ，請使用這個建構函式。

適用於

X509EnhancedKeyUsageExtension(OidCollection, Boolean)

來源:: X509EnhancedKeyUsageExtension.cs

來源:: X509EnhancedKeyUsageExtension.cs

來源:: X509EnhancedKeyUsageExtension.cs

使用 X509EnhancedKeyUsageExtension 和識別擴充功能是否重要的值，初始化 OidCollection 類別的新執行個體。

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)

參數

enhancedKeyUsages: OidCollection

OidCollection。

critical: Boolean

如果是關鍵擴充功能則為 true，否則為 false。

例外狀況

CryptographicException

指定的 OidCollection 包含一或多個損毀的值。

適用於

共用方式為

X509EnhancedKeyUsageExtension 建構函式

定義

多載

X509EnhancedKeyUsageExtension()

範例

備註

適用於

X509EnhancedKeyUsageExtension(AsnEncodedData, Boolean)

參數

備註

適用於

X509EnhancedKeyUsageExtension(OidCollection, Boolean)

參數

例外狀況

適用於

意見反應

其他資源