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X509BasicConstraintsExtension Konstruktory

Definice

Inicializuje novou instanci X509BasicConstraintsExtension třídy.

Přetížení

X509BasicConstraintsExtension()

Inicializuje novou instanci X509BasicConstraintsExtension třídy.

X509BasicConstraintsExtension(AsnEncodedData, Boolean)

Inicializuje novou instanci X509BasicConstraintsExtension třídy pomocí objektu AsnEncodedData a hodnotu, která identifikuje, zda je rozšíření kritické.

X509BasicConstraintsExtension(Boolean, Boolean, Int32, Boolean)

Inicializuje novou instanci X509BasicConstraintsExtension třídy. Parametry určují hodnotu, která určuje, jestli je certifikát certifikátem certifikační autority (CA), hodnota, která označuje, jestli má certifikát omezení počtu úrovní cesty, které umožňuje, počet úrovní povolených v cestě certifikátu a hodnota, která označuje, jestli je rozšíření kritické.

X509BasicConstraintsExtension()

Inicializuje novou instanci X509BasicConstraintsExtension třídy.

public:
 X509BasicConstraintsExtension();
public X509BasicConstraintsExtension ();
Public Sub New ()

Příklady

Následující příklad kódu ukazuje, jak otevřít osobní úložiště certifikátů uživatele a zobrazit informace o každém certifikátu v úložišti. Tento příklad používá X509BasicConstraintsExtension třídu k zobrazení informací.

#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

Platí pro

X509BasicConstraintsExtension(AsnEncodedData, Boolean)

Inicializuje novou instanci X509BasicConstraintsExtension třídy pomocí objektu AsnEncodedData a hodnotu, která identifikuje, zda je rozšíření kritické.

public:
 X509BasicConstraintsExtension(System::Security::Cryptography::AsnEncodedData ^ encodedBasicConstraints, bool critical);
public X509BasicConstraintsExtension (System.Security.Cryptography.AsnEncodedData encodedBasicConstraints, bool critical);
new System.Security.Cryptography.X509Certificates.X509BasicConstraintsExtension : System.Security.Cryptography.AsnEncodedData * bool -> System.Security.Cryptography.X509Certificates.X509BasicConstraintsExtension
Public Sub New (encodedBasicConstraints As AsnEncodedData, critical As Boolean)

Parametry

encodedBasicConstraints
AsnEncodedData

Kódovaná data, která se mají použít k vytvoření rozšíření.

critical
Boolean

true je-li rozšíření kritické; falsev opačném případě .

Poznámky

Tento konstruktor použijte, pokud informace k vytvoření rozšíření již v objektu AsnEncodedData .

Platí pro

X509BasicConstraintsExtension(Boolean, Boolean, Int32, Boolean)

Inicializuje novou instanci X509BasicConstraintsExtension třídy. Parametry určují hodnotu, která určuje, jestli je certifikát certifikátem certifikační autority (CA), hodnota, která označuje, jestli má certifikát omezení počtu úrovní cesty, které umožňuje, počet úrovní povolených v cestě certifikátu a hodnota, která označuje, jestli je rozšíření kritické.

public:
 X509BasicConstraintsExtension(bool certificateAuthority, bool hasPathLengthConstraint, int pathLengthConstraint, bool critical);
public X509BasicConstraintsExtension (bool certificateAuthority, bool hasPathLengthConstraint, int pathLengthConstraint, bool critical);
new System.Security.Cryptography.X509Certificates.X509BasicConstraintsExtension : bool * bool * int * bool -> System.Security.Cryptography.X509Certificates.X509BasicConstraintsExtension
Public Sub New (certificateAuthority As Boolean, hasPathLengthConstraint As Boolean, pathLengthConstraint As Integer, critical As Boolean)

Parametry

certificateAuthority
Boolean

true pokud je certifikát certifikátem certifikační autority (CA), falsev opačném případě .

hasPathLengthConstraint
Boolean

true pokud má certifikát omezení počtu úrovní cesty, které povoluje; falsev opačném případě .

pathLengthConstraint
Int32

Počet úrovní povolených v cestě certifikátu.

critical
Boolean

true je-li rozšíření kritické; falsev opačném případě .

Platí pro