IAuthenticationModule.Authenticate(String, WebRequest, ICredentials) Метод

Определение

Возвращает экземпляр класса Authorization в ответ на запрос проверки подлинности, посылаемый с сервера.Returns an instance of the Authorization class in response to an authentication challenge from a server.

public:
 System::Net::Authorization ^ Authenticate(System::String ^ challenge, System::Net::WebRequest ^ request, System::Net::ICredentials ^ credentials);
public System.Net.Authorization? Authenticate (string challenge, System.Net.WebRequest request, System.Net.ICredentials credentials);
public System.Net.Authorization Authenticate (string challenge, System.Net.WebRequest request, System.Net.ICredentials credentials);
abstract member Authenticate : string * System.Net.WebRequest * System.Net.ICredentials -> System.Net.Authorization
Public Function Authenticate (challenge As String, request As WebRequest, credentials As ICredentials) As Authorization

Параметры

challenge
String

Запрос проверки подлинности, посылаемый сервером.The authentication challenge sent by the server.

request
WebRequest

Экземпляр класса WebRequest, связанный с запросом.The WebRequest instance associated with the challenge.

credentials
ICredentials

Учетные данные, связанные с запросом.The credentials associated with the challenge.

Возвращаемое значение

Authorization

Экземпляр класса Authorization, содержащий сообщение авторизации для запроса или null, если запрос не может быть обработан.An Authorization instance containing the authorization message for the request, or null if the challenge cannot be handled.

Примеры

В следующем примере показано, как использовать метод Authenticate.The following example shows how to use the Authenticate method. Полный пример см AuthenticationManager . в классе.For a complete example refer to the AuthenticationManager class.

// Authenticate is the core method for this custom authentication.
// When an internet resource requests authentication, the WebRequest::GetResponse
// method calls the AuthenticationManager::Authenticate method. This method, in
// turn, calls the Authenticate method on each of the registered authentication
// modules, in the order they were registered. When the authentication is
// complete an Authorization object is returned to the WebRequest, as
// shown by this routine's retun type.
virtual Authorization^ Authenticate( String^ challenge, WebRequest^ request, ICredentials^ credentials )
{
   Encoding^ ASCII = Encoding::ASCII;
   
   // Get the username and password from the credentials
   NetworkCredential^ MyCreds = credentials->GetCredential( request->RequestUri, "Basic" );
   if ( PreAuthenticate( request, credentials ) == nullptr )
         Console::WriteLine( "\n Pre-authentication is not allowed." );
   else
         Console::WriteLine( "\n Pre-authentication is allowed." );

   
   // Verify that the challenge satisfies the authorization requirements.
   bool challengeOk = checkChallenge( challenge, MyCreds->Domain );
   if (  !challengeOk )
         return nullptr;

   
   // Create the encrypted string according to the Basic authentication format as
   // follows:
   // a)Concatenate username and password separated by colon;
   // b)Apply ASCII encoding to obtain a stream of bytes;
   // c)Apply Base64 Encoding to this array of bytes to obtain the encoded
   // authorization.
   String^ BasicEncrypt = String::Concat( MyCreds->UserName, ":", MyCreds->Password );
   String^ BasicToken = String::Concat( "Basic ", Convert::ToBase64String( ASCII->GetBytes( BasicEncrypt ) ) );
   
   // Create an Authorization object using the above encoded authorization.
   Authorization^ resourceAuthorization = gcnew Authorization( BasicToken );
   
   // Get the Message property which contains the authorization string that the
   // client returns to the server when accessing protected resources
   Console::WriteLine( "\n Authorization Message: {0}", resourceAuthorization->Message );
   
   // Get the Complete property which is set to true when the authentication process
   // between the client and the server is finished.
   Console::WriteLine( "\n Authorization Complete: {0}", resourceAuthorization->Complete );
   
   Console::WriteLine( "\n Authorization ConnectionGroupId: {0}", resourceAuthorization->ConnectionGroupId );
   return resourceAuthorization;
}

// Authenticate is the core method for this custom authentication.
// When an Internet resource requests authentication, the WebRequest.GetResponse
// method calls the AuthenticationManager.Authenticate method. This method, in
// turn, calls the Authenticate method on each of the registered authentication
// modules, in the order in which they were registered. When the authentication is
// complete an Authorization object is returned to the WebRequest.
public Authorization Authenticate(String challenge, WebRequest request, ICredentials credentials)
{
  Encoding ASCII = Encoding.ASCII;

  // Get the username and password from the credentials
  NetworkCredential MyCreds = credentials.GetCredential(request.RequestUri, "Basic");

  if (PreAuthenticate(request, credentials) == null)
    Console.WriteLine("\n Pre-authentication is not allowed.");
  else
    Console.WriteLine("\n Pre-authentication is allowed.");

  // Verify that the challenge satisfies the authorization requirements.
  bool challengeOk = checkChallenge(challenge, MyCreds.Domain);

  if (!challengeOk)
    return null;

  // Create the encrypted string according to the Basic authentication format as
  // follows:
  // a)Concatenate the username and password separated by colon;
  // b)Apply ASCII encoding to obtain a stream of bytes;
  // c)Apply Base64 encoding to this array of bytes to obtain the encoded
  // authorization.
  string BasicEncrypt = MyCreds.UserName + ":" + MyCreds.Password;

  string BasicToken = "Basic " + Convert.ToBase64String(ASCII.GetBytes(BasicEncrypt));

  // Create an Authorization object using the encoded authorization above.
  Authorization resourceAuthorization = new Authorization(BasicToken);

  // Get the Message property, which contains the authorization string that the
  // client returns to the server when accessing protected resources.
  Console.WriteLine("\n Authorization Message:{0}",resourceAuthorization.Message);

  // Get the Complete property, which is set to true when the authentication process
  // between the client and the server is finished.
  Console.WriteLine("\n Authorization Complete:{0}",resourceAuthorization.Complete);

  Console.WriteLine("\n Authorization ConnectionGroupId:{0}",resourceAuthorization.ConnectionGroupId);

  return resourceAuthorization;
}
  ' Authenticate is the core method for this custom authentication.
  ' When an Internet resource requests authentication, the WebRequest.GetResponse 
  ' method calls the AuthenticationManager.Authenticate method. This method, in 
  ' turn, calls the Authenticate method on each of the registered authentication
  ' modules, in the order in which they were registered. When the authentication is 
  ' complete an Authorization object is returned to the WebRequest.
  Public Function Authenticate(ByVal challenge As String, ByVal request As WebRequest, ByVal credentials As ICredentials) As Authorization _
      Implements IAuthenticationModule.Authenticate


    Dim ASCII As Encoding = Encoding.ASCII

    ' Get the username and password from the credentials
    Dim MyCreds As NetworkCredential = credentials.GetCredential(request.RequestUri, "Basic")

    If PreAuthenticate(request, credentials) Is Nothing Then
      Console.WriteLine(ControlChars.Lf + " Pre-authentication is not allowed.")
    Else
      Console.WriteLine(ControlChars.Lf + " Pre-authentication is allowed.")
    End If
    ' Verify that the challenge satisfies the authorization requirements.
    Dim challengeOk As Boolean = checkChallenge(challenge, MyCreds.Domain)

    If Not challengeOk Then
      Return Nothing
    End If

    ' Create the encrypted string according to the Basic authentication format as
    ' follows:
    ' a)Concatenate the username and password separated by colon;
    ' b)Apply ASCII encoding to obtain a stream of bytes;
    ' c)Apply Base64 encoding to this array of bytes to obtain the encoded 
    ' authorization.
    Dim BasicEncrypt As String = MyCreds.UserName + ":" + MyCreds.Password

    Dim BasicToken As String = "Basic " + Convert.ToBase64String(ASCII.GetBytes(BasicEncrypt))

    ' Create an Authorization object using the encoded authorization above.
    Dim resourceAuthorization As New Authorization(BasicToken)

    ' Get the Message property, which contains the authorization string that the 
    ' client returns to the server when accessing protected resources.
    Console.WriteLine(ControlChars.Lf + " Authorization Message:{0}", resourceAuthorization.Message)

    ' Get the Complete property, which is set to true when the authentication process 
    ' between the client and the server is finished.
    Console.WriteLine(ControlChars.Lf + " Authorization Complete:{0}", resourceAuthorization.Complete)

    Console.WriteLine(ControlChars.Lf + " Authorization ConnectionGroupId:{0}", resourceAuthorization.ConnectionGroupId)


    Return resourceAuthorization
  End Function 'Authenticate
End Class

Комментарии

AuthenticateМетод выполняет процесс проверки подлинности с сервером и возвращает экземпляр в Authorization AuthenticationManager .The Authenticate method conducts the authentication process with the server and returns an Authorization instance to the AuthenticationManager.

Примечания для тех, кто реализует этот метод

AuthenticationManagerВызывает Authenticate(String, WebRequest, ICredentials) метод для зарегистрированных модулей проверки подлинности, чтобы определить, какой модуль обрабатывает задачу.The AuthenticationManager calls the Authenticate(String, WebRequest, ICredentials) method on registered authentication modules to determine which module handles the challenge. Если модуль проверки подлинности не может справиться с задачей, Authenticate(String, WebRequest, ICredentials) метод должен возвращать значение null .If the authentication module cannot handle the challenge, the Authenticate(String, WebRequest, ICredentials) method must return null. Если модуль проверки подлинности обнаруживает ошибку при выполнении процесса проверки подлинности, Authenticate(String, WebRequest, ICredentials) необходимо создать исключение.If the authentication module encounters an error while conducting the authentication process, Authenticate(String, WebRequest, ICredentials) must throw an exception.

Применяется к