X509KeyUsageExtension Construtores

Referência

Definição

Namespace:: System.Security.Cryptography.X509Certificates

Assembly:: System.Security.Cryptography.X509Certificates.dll

Assembly:: System.Security.Cryptography.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Importante

Algumas informações se referem a produtos de pré-lançamento que podem ser substancialmente modificados antes do lançamento. A Microsoft não oferece garantias, expressas ou implícitas, das informações aqui fornecidas.

Inicializa uma nova instância da classe X509KeyUsageExtension.

Sobrecargas

X509KeyUsageExtension()	Inicializa uma nova instância da classe X509KeyUsageExtension.
X509KeyUsageExtension(AsnEncodedData, Boolean)	Inicializa uma nova instância da classe X509KeyUsageExtension usando um objeto AsnEncodedData e um valor que identifica se a extensão é crítica.
X509KeyUsageExtension(X509KeyUsageFlags, Boolean)	Inicializa uma nova instância da classe X509KeyUsageExtension usando o objeto X509KeyUsageFlags e especificado e um valor que identifica se a extensão é crítica.

X509KeyUsageExtension()

Origem:: X509KeyUsageExtension.cs

Origem:: X509KeyUsageExtension.cs

Origem:: X509KeyUsageExtension.cs

Inicializa uma nova instância da classe X509KeyUsageExtension.

public:
 X509KeyUsageExtension();

public X509KeyUsageExtension ();

Public Sub New ()

Exemplos

O exemplo de código a seguir demonstra como abrir o repositório de certificados pessoal de um usuário e exibir informações sobre cada certificado no repositório. Este exemplo usa a X509KeyUsageExtension classe para exibir as informações.

#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

Aplica-se a

X509KeyUsageExtension(AsnEncodedData, Boolean)

Origem:: X509KeyUsageExtension.cs

Origem:: X509KeyUsageExtension.cs

Origem:: X509KeyUsageExtension.cs

Inicializa uma nova instância da classe X509KeyUsageExtension usando um objeto AsnEncodedData e um valor que identifica se a extensão é crítica.

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)

Parâmetros

encodedKeyUsage: AsnEncodedData

Os dados codificados a serem usados para criar a extensão.

critical: Boolean

true se a extensão for crítica, caso contrário, false.

Comentários

Use esse construtor se as informações para criar a extensão já estiverem em um AsnEncodedData objeto .

Aplica-se a

X509KeyUsageExtension(X509KeyUsageFlags, Boolean)

Origem:: X509KeyUsageExtension.cs

Origem:: X509KeyUsageExtension.cs

Origem:: X509KeyUsageExtension.cs

Inicializa uma nova instância da classe X509KeyUsageExtension usando o objeto X509KeyUsageFlags e especificado e um valor que identifica se a extensão é crítica.

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)

Parâmetros

keyUsages: X509KeyUsageFlags

Um dos valores de X509KeyUsageFlags que descreve como usar a chave.

critical: Boolean

true se a extensão for crítica, caso contrário, false.

Aplica-se a

Compartilhar via

X509KeyUsageExtension Construtores

Definição

Sobrecargas

X509KeyUsageExtension()

Exemplos

Aplica-se a

X509KeyUsageExtension(AsnEncodedData, Boolean)

Parâmetros

Comentários

Aplica-se a

X509KeyUsageExtension(X509KeyUsageFlags, Boolean)

Parâmetros

Aplica-se a

Recursos adicionais