X509Extension X509Extension X509Extension X509Extension Class

Definice

Představuje x X509 rozšíření.Represents an X509 extension.

public ref class X509Extension : System::Security::Cryptography::AsnEncodedData
public class X509Extension : System.Security.Cryptography.AsnEncodedData
type X509Extension = class
    inherit AsnEncodedData
Public Class X509Extension
Inherits AsnEncodedData
Dědičnost
X509ExtensionX509ExtensionX509ExtensionX509Extension
Odvozené

Příklady

Následující příklad kódu ukazuje použití X509Extension třídy.The following code example demonstrates using the X509Extension class.

#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
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

Poznámky

X509 rozšíření jsou dynamická a rozšířené vlastnosti, které mohou být přidány do x X509 certifikátu a změnit.X509 extensions are dynamic, extended properties that can be added to an X509 certificate and changed. X509Extension Třídy je možné vytvářet rozšíření, které jsou spojeny s certifikátem, ale nejsou součástí certifikátu vydaného certifikační autoritou (CA).The X509Extension class can be used to create extensions that are associated with a certificate but are not part of a certificate as issued by a certification authority (CA).

Ve své nejzákladnější formě x X509 rozšíření má identifikátor objektu (OID), logickou hodnotu popisující, zda rozšíření se považují za kritická nebo Ne a data zakódovaná ve číslo ASN.In its most basic form, an X509 extension has an object identifier (OID), a Boolean value describing whether the extension is considered critical or not, and ASN-encoded data. Vlastní rozšíření mohou být registrovány v CryptoConfig souboru.Custom extensions can be registered in a CryptoConfig file.

Rozhraní.NET Framework zahrnuje implementace několik běžných X509 rozšíření:The.NET Framework includes implementations of several common X509 extensions:

Konstruktory

X509Extension() X509Extension() X509Extension() X509Extension()

Inicializuje novou instanci třídy X509Extension třídy.Initializes a new instance of the X509Extension class.

X509Extension(AsnEncodedData, Boolean) X509Extension(AsnEncodedData, Boolean) X509Extension(AsnEncodedData, Boolean) X509Extension(AsnEncodedData, Boolean)

Inicializuje novou instanci třídy X509Extension třídy.Initializes a new instance of the X509Extension class.

X509Extension(Oid, Byte[], Boolean) X509Extension(Oid, Byte[], Boolean) X509Extension(Oid, Byte[], Boolean) X509Extension(Oid, Byte[], Boolean)

Inicializuje novou instanci třídy X509Extension třídy.Initializes a new instance of the X509Extension class.

X509Extension(String, Byte[], Boolean) X509Extension(String, Byte[], Boolean) X509Extension(String, Byte[], Boolean) X509Extension(String, Byte[], Boolean)

Inicializuje novou instanci třídy X509Extension třídy.Initializes a new instance of the X509Extension class.

Vlastnosti

Critical Critical Critical Critical

Získá logickou hodnotu označující, zda toto rozšíření je velmi důležité.Gets a Boolean value indicating whether the extension is critical.

Oid Oid Oid Oid

Získá nebo nastaví Oid hodnotu pro AsnEncodedData objektu.Gets or sets the Oid value for an AsnEncodedData object.

(Inherited from AsnEncodedData)
RawData RawData RawData RawData

Získá nebo nastaví data zakódovaná ve včetně ASN.1 Abstract Syntax Notation jeden v bajtové pole.Gets or sets the Abstract Syntax Notation One (ASN.1)-encoded data represented in a byte array.

(Inherited from AsnEncodedData)

Metody

CopyFrom(AsnEncodedData) CopyFrom(AsnEncodedData) CopyFrom(AsnEncodedData) CopyFrom(AsnEncodedData)

Kopíruje vlastnosti rozšíření zadaného AsnEncodedData objektu.Copies the extension properties of the specified AsnEncodedData object.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Určuje, zda se zadaný objekt rovná aktuálnímu objektu.Determines whether the specified object is equal to the current object.

(Inherited from Object)
Format(Boolean) Format(Boolean) Format(Boolean) Format(Boolean)

Vrátí formátovaný verzi data zakódovaná ve abstraktní ASN.1 jeden Syntax Notation jako řetězec.Returns a formatted version of the Abstract Syntax Notation One (ASN.1)-encoded data as a string.

(Inherited from AsnEncodedData)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Slouží jako výchozí funkce hash.Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Získá Type aktuální instance.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Vytvoří Mělkou kopii aktuální Object.Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

Vrací řetězec, který představuje aktuální objekt.Returns a string that represents the current object.

(Inherited from Object)

Platí pro