PrincipalPermissionAttribute Classe

Definição

public ref class PrincipalPermissionAttribute sealed : System::Security::Permissions::CodeAccessSecurityAttribute

[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Method, AllowMultiple=true, Inherited=false)]
public sealed class PrincipalPermissionAttribute : System.Security.Permissions.CodeAccessSecurityAttribute

[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Method, AllowMultiple=true, Inherited=false)]
[System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public sealed class PrincipalPermissionAttribute : System.Security.Permissions.CodeAccessSecurityAttribute

[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Method, AllowMultiple=true, Inherited=false)]
[System.Serializable]
public sealed class PrincipalPermissionAttribute : System.Security.Permissions.CodeAccessSecurityAttribute

[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Method, AllowMultiple=true, Inherited=false)]
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class PrincipalPermissionAttribute : System.Security.Permissions.CodeAccessSecurityAttribute

[<System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Method, AllowMultiple=true, Inherited=false)>]
type PrincipalPermissionAttribute = class
    inherit CodeAccessSecurityAttribute

[<System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Method, AllowMultiple=true, Inherited=false)>]
[<System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
type PrincipalPermissionAttribute = class
    inherit CodeAccessSecurityAttribute

[<System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Method, AllowMultiple=true, Inherited=false)>]
[<System.Serializable>]
type PrincipalPermissionAttribute = class
    inherit CodeAccessSecurityAttribute

[<System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Method, AllowMultiple=true, Inherited=false)>]
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type PrincipalPermissionAttribute = class
    inherit CodeAccessSecurityAttribute

Public NotInheritable Class PrincipalPermissionAttribute
Inherits CodeAccessSecurityAttribute

Herança

Object

Attribute

SecurityAttribute

CodeAccessSecurityAttribute

PrincipalPermissionAttribute

Atributos

AttributeUsageAttribute ObsoleteAttribute SerializableAttribute ComVisibleAttribute

Exemplos

O exemplo a seguir demonstra como a PrincipalPermissionAttribute classe é usada declarativamente para exigir que o usuário atual seja um administrador.

using namespace System;
using namespace System::Security;
using namespace System::Security::Permissions;
using namespace System::Security::Policy;
using namespace System::Security::Principal;

[PrincipalPermission(SecurityAction::Demand, Role = "Administrators")]
void CheckAdministrator()
{
    Console::WriteLine("User is an administrator.");
}
int main(array<System::String ^> ^args)
{
    try
    {
        // Must set PrincipalPolicy to WindowsPrincipal
        AppDomain::CurrentDomain->SetPrincipalPolicy(PrincipalPolicy::WindowsPrincipal);
        // Check using declarative security.
        CheckAdministrator();
        // Check using Imperative security.
        System::String^ null;
        PrincipalPermission^ principalPerm = gcnew PrincipalPermission(null, "Administrators" );
        principalPerm->Demand();
        Console::WriteLine("Demand succeeded");
    }
    catch (Exception ^e)
    {
        Console::WriteLine(e->Message);
    }
    return 0;
}

using System;
using System.Threading;
using System.Security.Permissions;
using System.Security.Principal;

class SecurityPrincipalDemo
{
    public static void Main()
    {
        try
        {
            // PrincipalPolicy must be set to WindowsPrincipal to check roles.
            AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
            // Check using the PrincipalPermissionAttribute
            CheckAdministrator();
            // Check using PrincipalPermission class.
            PrincipalPermission principalPerm = new PrincipalPermission(null, "Administrators");
            principalPerm.Demand();
            Console.WriteLine("Demand succeeded.");
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
    }
    [PrincipalPermission(SecurityAction.Demand, Role = "Administrators")]
    static void CheckAdministrator()
    {
        Console.WriteLine("User is an administrator");
    }
}

Imports System.Threading
Imports System.Security.Permissions
Imports System.Security.Principal



Class SecurityPrincipalDemo

    Public Shared Sub Main()
        Try
            ' PrincipalPolicy must be set to WindowsPrincipal to check roles.
            AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal)
            ' Check using the PrincipalPermissionAttribute
            CheckAdministrator()
            ' Check using PrincipalPermission class.
            Dim principalPerm As New PrincipalPermission(Nothing, "Administrators")
            principalPerm.Demand()
            Console.WriteLine("Demand succeeded.")
        Catch e As Exception
            Console.WriteLine(e.Message)
        End Try

    End Sub

    <PrincipalPermission(SecurityAction.Demand, Role:="Administrators")> _
    Shared Sub CheckAdministrator()
        Console.WriteLine("User is an administrator")

    End Sub
End Class

Comentários

PrincipalPermissionAttribute pode ser usado para exigir declarativamente que os usuários que executam seu código pertençam a uma função especificada ou tenham sido autenticados. O uso de Unrestricted cria um PrincipalPermission com Authenticated definido true e Name Role definido como null.

O escopo da declaração permitida depende do SecurityAction que é usado. PrincipalPermissionAttribute não pode ser aplicado no nível do assembly.

As informações de segurança declaradas por um atributo de segurança são armazenadas nos metadados do destino do atributo e são acessadas pelo sistema em tempo de execução. Os atributos de segurança são usados apenas para segurança declarativa. Para segurança imperativa, use a classe de permissão correspondente.

Construtores

Propriedades

Métodos

Implantações explícitas de interface

Aplica-se a

Confira também

• PrincipalPermission
• Estendendo metadados por meio de atributos