ProtectionLevel Enumeração
Importante
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Indica os serviços de segurança solicitados para um fluxo autenticado.
public enum class ProtectionLevel
public enum ProtectionLevel
type ProtectionLevel =
Public Enum ProtectionLevel
- Herança
EncryptAndSign | 2 | Criptografar e assinar dados para ajudar a garantir a confidencialidade e integridade dos dados transmitidos. |
None | 0 | Somente autenticação. |
Sign | 1 | Assinar dados para ajudar a garantir a integridade dos dados transmitidos. |
O exemplo de código a seguir demonstra a criação e o uso de um lado NegotiateStreamdo cliente.
#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);
}
}
}
Essa enumeração é usada pela classe de NegotiateStream .
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