ProtectionLevel Enumeration

Definition

Gibt die für einen authentifizierten Stream angeforderten Sicherheitsdienste an.Indicates the security services requested for an authenticated stream.

public enum class ProtectionLevel
public enum ProtectionLevel
type ProtectionLevel = 
Public Enum ProtectionLevel
Vererbung
ProtectionLevel

Felder

EncryptAndSign 2

Verschlüsselt und signiert Daten, um die Vertraulichkeit und Integrität übertragener Daten sicherzustellen.Encrypt and sign data to help ensure the confidentiality and integrity of transmitted data.

None 0

Nur Authentifizierung.Authentication only.

Sign 1

Signiert Daten, um die Integrität übertragener Daten sicherzustellen.Sign data to help ensure the integrity of transmitted data.

Beispiele

Im folgenden Codebeispiel wird das Erstellen und Verwenden eines Client seitigen NegotiateStreamveranschaulicht.The following code example demonstrates creating and using a client-side NegotiateStream.

#using <System.dll>

using namespace System;
using namespace System::Net;
using namespace System::Net::Security;
using namespace System::Net::Sockets;
using namespace System::Security::Principal;

static void DisplayStreamProperties( NegotiateStream^ stream )
{
   Console::WriteLine( L"Can read: {0}", stream->CanRead );
   Console::WriteLine( L"Can write: {0}", stream->CanWrite );
   Console::WriteLine( L"Can seek: {0}", stream->CanSeek );
   try
   {
      
      // If the underlying stream supports it, display the length.
      Console::WriteLine( L"Length: {0}", stream->Length );
   }
   catch ( NotSupportedException^ ) 
   {
      Console::WriteLine( L"Cannot get the length of the underlying stream." );
   }

   if ( stream->CanTimeout )
   {
      Console::WriteLine( L"Read time-out: {0}", stream->ReadTimeout );
      Console::WriteLine( L"Write time-out: {0}", stream->WriteTimeout );
   }
}


static void DisplayAuthenticationProperties( NegotiateStream^ stream )
{
   Console::WriteLine( L"IsAuthenticated: {0}", stream->IsAuthenticated );
   Console::WriteLine( L"IsMutuallyAuthenticated: {0}", stream->IsMutuallyAuthenticated );
   Console::WriteLine( L"IsEncrypted: {0}", stream->IsEncrypted );
   Console::WriteLine( L"IsSigned: {0}", stream->IsSigned );
   Console::WriteLine( L"ImpersonationLevel: {0}", stream->ImpersonationLevel );
   Console::WriteLine( L"IsServer: {0}", stream->IsServer );
}


int main()
{
   
   // Establish the remote endpoint for the socket.
   // For this example, use the local machine.
   IPHostEntry^ ipHostInfo = Dns::GetHostEntry( Dns::GetHostName() );
   IPAddress^ ipAddress = ipHostInfo->AddressList[ 0 ];
   
   // Client and server use port 11000. 
   IPEndPoint^ remoteEP = gcnew IPEndPoint( ipAddress,11000 );
   
   // Create a TCP/IP socket.
   TcpClient^ client = gcnew TcpClient;
   
   // Connect the socket to the remote endpoint.
   client->Connect( remoteEP );
   Console::WriteLine( L"Client connected to {0}.", remoteEP );
   
   // Ensure the client does not close when there is 
   // still data to be sent to the server.
   client->LingerState = (gcnew LingerOption( true,0 ));
   
   // Request authentication.
   NetworkStream^ clientStream = client->GetStream();
   NegotiateStream^ authStream = gcnew NegotiateStream( clientStream );
   
   // Request authentication for the client only (no mutual authentication).
   // Authenicate using the client's default credetials.
   // Permit the server to impersonate the client to access resources on the server only.
   // Request that data be transmitted using encryption and data signing.
   authStream->AuthenticateAsClient( dynamic_cast<NetworkCredential^>(CredentialCache::DefaultCredentials), 
          L"", 
          ProtectionLevel::EncryptAndSign, 
          TokenImpersonationLevel::Impersonation );
   
   DisplayAuthenticationProperties( authStream );
   DisplayStreamProperties( authStream );
   if ( authStream->CanWrite )
   {
      
      // Encode the test data into a byte array.
      array<Byte>^message = System::Text::Encoding::UTF8->GetBytes( L"Hello from the client." );
      authStream->Write( message, 0, message->Length );
      authStream->Flush();
      Console::WriteLine( L"Sent {0} bytes.", message->Length );
   }

   
   // Close the client connection.
   authStream->Close();
   Console::WriteLine( L"Client closed." );
}

using System;
using System.Net;
using System.Net.Security;
using System.Net.Sockets;
using System.Security.Principal;

namespace Examples.NegotiateStreamExample
{
    public class SynchronousAuthenticatingTcpClient 
    {
        public static void Main(String[] args)  
        {
            // Establish the remote endpoint for the socket.
            // For this example, use the local machine.
            IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
            IPAddress ipAddress = ipHostInfo.AddressList[0];
            // Client and server use port 11000. 
            IPEndPoint remoteEP = new IPEndPoint(ipAddress,11000);
            // Create a TCP/IP socket.
           TcpClient client = new TcpClient();
            // Connect the socket to the remote endpoint.
            client.Connect(remoteEP);
            Console.WriteLine("Client connected to {0}.",
                remoteEP.ToString());
            // Ensure the client does not close when there is 
            // still data to be sent to the server.
            client.LingerState = (new LingerOption(true,0));
            // Request authentication.
            NetworkStream clientStream = client.GetStream();
            NegotiateStream authStream = new NegotiateStream(clientStream); 
            // Request authentication for the client only (no mutual authentication).
            // Authenicate using the client's default credetials.
            // Permit the server to impersonate the client to access resources on the server only.
            // Request that data be transmitted using encryption and data signing.
            authStream.AuthenticateAsClient(
                 (NetworkCredential) CredentialCache.DefaultCredentials, 
                 "",
                 ProtectionLevel.EncryptAndSign,
                 TokenImpersonationLevel.Impersonation);
            DisplayAuthenticationProperties(authStream);
            DisplayStreamProperties(authStream);
            if (authStream.CanWrite)
            {
                 // Encode the test data into a byte array.
                byte[] message = System.Text.Encoding.UTF8.GetBytes("Hello from the client.");
                authStream.Write(message, 0, message.Length);
          authStream.Flush();
                Console.WriteLine("Sent {0} bytes.", message.Length);
         }
         // Close the client connection.
            authStream.Close();
            Console.WriteLine("Client closed.");
            
    }
         static void DisplayStreamProperties(NegotiateStream stream)
        {
             Console.WriteLine("Can read: {0}", stream.CanRead);
             Console.WriteLine("Can write: {0}", stream.CanWrite);
             Console.WriteLine("Can seek: {0}", stream.CanSeek);
             try 
             {
                 // If the underlying stream supports it, display the length.
                 Console.WriteLine("Length: {0}", stream.Length);
             } catch (NotSupportedException)
             {
                     Console.WriteLine("Cannot get the length of the underlying stream.");
             }
             
             if (stream.CanTimeout)
             {
                 Console.WriteLine("Read time-out: {0}", stream.ReadTimeout);
                 Console.WriteLine("Write time-out: {0}", stream.WriteTimeout);
             }
        }
         static void DisplayAuthenticationProperties(NegotiateStream stream)
        {
             Console.WriteLine("IsAuthenticated: {0}", stream.IsAuthenticated);
            Console.WriteLine("IsMutuallyAuthenticated: {0}", stream.IsMutuallyAuthenticated);
            Console.WriteLine("IsEncrypted: {0}", stream.IsEncrypted);
            Console.WriteLine("IsSigned: {0}", stream.IsSigned);
            Console.WriteLine("ImpersonationLevel: {0}", stream.ImpersonationLevel);
            Console.WriteLine("IsServer: {0}", stream.IsServer);
        }
    }
}

Hinweise

Diese Enumeration wird von der NegotiateStream-Klasse verwendet.This enumeration is used by the NegotiateStream class.

Gilt für: