X509Extension.CopyFrom メソッド

.NET Framework クラス ライブラリ リファレンス

X509Extension.CopyFrom メソッド

メモ : このメソッドは、.NET Framework version 2.0 で新しく追加されたものです。

指定された AsnEncodedData オブジェクトの拡張機能プロパティをコピーします。

名前空間: System.Security.Cryptography.X509Certificates
アセンブリ: System (system.dll 内)
構文

Visual Basic (宣言)

Public Overrides Sub CopyFrom
 ( _
    asnEncodedData As AsnEncodedData _
)

Visual Basic (使用法)

Dim instance As X509Extension
Dim asnEncodedData As AsnEncodedData

instance.CopyFrom(asnEncodedData)

C#

public override void CopyFrom (
    AsnEncodedData asnEncodedData
)

C++

public:
virtual void CopyFrom (
    AsnEncodedData^ asnEncodedData
) override

J#

public void CopyFrom (
    AsnEncodedData asnEncodedData
)

JScript

public override function CopyFrom (
    asnEncodedData : AsnEncodedData
)

パラメータ

asnEncodedData

コピーする AsnEncodedData。

例外

例外の種類	条件
ArgumentNullException	asnEncodedData が null 参照 (Visual Basic では Nothing) です。

解説

このメソッドでは、指定された X509Extension の拡張機能プロパティがコピーされ、それらが、呼び出し元の X509Extension クラスのインスタンスに追加されます。

使用例

X509Extension クラスを使用するコード例を次に示します。

Visual Basic

Imports System
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)
            Dim i As Integer
            For i = 0 To collection.Count
                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

C#

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.");
        }
    }
}

C++

#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." );
   }

}

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0

参照

関連項目
X509Extension クラス
X509Extension メンバ
System.Security.Cryptography.X509Certificates 名前空間