X509EnhancedKeyUsageExtension コンストラクター

定義

X509EnhancedKeyUsageExtension クラスの新しいインスタンスを初期化します。

オーバーロード

X509EnhancedKeyUsageExtension()

X509EnhancedKeyUsageExtension クラスの新しいインスタンスを初期化します。

X509EnhancedKeyUsageExtension(AsnEncodedData, Boolean)

X509EnhancedKeyUsageExtension オブジェクト、および拡張機能が重要であるかどうかを示す値を使用して、AsnEncodedData クラスの新しいインスタンスを初期化します。

X509EnhancedKeyUsageExtension(OidCollection, Boolean)

X509EnhancedKeyUsageExtension および拡張機能が重要であるかどうかを示す値を使用して、OidCollection クラスの新しいインスタンスを初期化します。

X509EnhancedKeyUsageExtension()

ソース:
X509EnhancedKeyUsageExtension.cs
ソース:
X509EnhancedKeyUsageExtension.cs
ソース:
X509EnhancedKeyUsageExtension.cs

X509EnhancedKeyUsageExtension クラスの新しいインスタンスを初期化します。

public:
 X509EnhancedKeyUsageExtension();
public X509EnhancedKeyUsageExtension ();
Public Sub New ()

次のコード例では、ユーザーの個人証明書ストアを開き、ストア内の各証明書に関する情報を表示する方法を示します。 この例では、 クラスを X509EnhancedKeyUsageExtension 使用して情報を表示します。

#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

注釈

クラスの新しいインスタンスを作成するには、このメソッドを X509EnhancedKeyUsageExtension 使用します。 インスタンスが作成されたら、 プロパティを EnhancedKeyUsages 使用して、キーを使用するアプリケーションを示すオブジェクト識別子 (OID) のコレクションを取得できます。

適用対象

X509EnhancedKeyUsageExtension(AsnEncodedData, Boolean)

ソース:
X509EnhancedKeyUsageExtension.cs
ソース:
X509EnhancedKeyUsageExtension.cs
ソース:
X509EnhancedKeyUsageExtension.cs

X509EnhancedKeyUsageExtension オブジェクト、および拡張機能が重要であるかどうかを示す値を使用して、AsnEncodedData クラスの新しいインスタンスを初期化します。

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)

パラメーター

encodedEnhancedKeyUsages
AsnEncodedData

拡張機能の作成に使用するエンコード済みのデータ。

critical
Boolean

拡張機能がクリティカルである場合は true。それ以外の場合は false

注釈

拡張機能を作成する情報が既に オブジェクトにある場合は、このコンストラクターを AsnEncodedData 使用します。

適用対象

X509EnhancedKeyUsageExtension(OidCollection, Boolean)

ソース:
X509EnhancedKeyUsageExtension.cs
ソース:
X509EnhancedKeyUsageExtension.cs
ソース:
X509EnhancedKeyUsageExtension.cs

X509EnhancedKeyUsageExtension および拡張機能が重要であるかどうかを示す値を使用して、OidCollection クラスの新しいインスタンスを初期化します。

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)

パラメーター

enhancedKeyUsages
OidCollection

OidCollection コレクション。

critical
Boolean

拡張機能がクリティカルである場合は true。それ以外の場合は false

例外

指定した OidCollection に、破損した値が 1 つ以上格納されています。

適用対象