AppDomain.IsFullyTrusted Propriedade

Definição

Namespace:

System

Assembly:

System.Runtime.dll

Assembly:

System.Runtime.Extensions.dll

Assembly:

mscorlib.dll

Assembly:

netstandard.dll

Obtém um valor que indica se os assemblies carregados no domínio de aplicativo atual são executados com confiança total.

public:
 property bool IsFullyTrusted { bool get(); };

public bool IsFullyTrusted { get; }

member this.IsFullyTrusted : bool

Public ReadOnly Property IsFullyTrusted As Boolean

Valor da propriedade

Boolean

true se os assemblies carregados no domínio de aplicativo atual forem executados com confiança total; caso contrário, false.

Exemplos

O exemplo a seguir demonstra a IsFullyTrusted propriedade e a Assembly.IsFullyTrusted propriedade com domínios de aplicativo totalmente confiáveis e parcialmente confiáveis. O domínio de aplicativo totalmente confiável é o domínio de aplicativo padrão para o aplicativo. O domínio de aplicativo parcialmente confiável é criado usando a sobrecarga do AppDomain.CreateDomain(String, Evidence, AppDomainSetup, PermissionSet, StrongName[]) método.

O exemplo usa uma Worker classe que deriva de, portanto, ela pode ser marshalada entre os limites do domínio do MarshalByRefObjectaplicativo. O exemplo cria um Worker objeto no domínio de aplicativo padrão. Em seguida, ele chama o TestIsFullyTrusted método para exibir o valor da propriedade para o domínio do aplicativo e para dois assemblies que são carregados no domínio do aplicativo: mscorlib, que faz parte do .NET Framework e o assembly de exemplo. O domínio do aplicativo é totalmente confiável, portanto, ambos os assemblies são totalmente confiáveis.

O exemplo cria outro Worker objeto em um domínio de aplicativo em área restrita e chama novamente o TestIsFullyTrusted método. Mscorlib é sempre confiável, mesmo em um domínio de aplicativo parcialmente confiável, mas o assembly de exemplo é parcialmente confiável.

using System;

namespace SimpleSandboxing
{
    public class Worker : MarshalByRefObject
    {
        static void Main()
        {
            Worker w = new Worker();
            w.TestIsFullyTrusted();

            AppDomain adSandbox = GetInternetSandbox();
            w = (Worker) adSandbox.CreateInstanceAndUnwrap(
                               typeof(Worker).Assembly.FullName,
                               typeof(Worker).FullName);
            w.TestIsFullyTrusted();
        }

        public void TestIsFullyTrusted()
        {
            AppDomain ad = AppDomain.CurrentDomain;
            Console.WriteLine("\r\nApplication domain '{0}': IsFullyTrusted = {1}",
                                        ad.FriendlyName, ad.IsFullyTrusted);

            Console.WriteLine("   IsFullyTrusted = {0} for the current assembly",
                             typeof(Worker).Assembly.IsFullyTrusted);

            Console.WriteLine("   IsFullyTrusted = {0} for mscorlib",
                                        typeof(int).Assembly.IsFullyTrusted);
        }

        // ------------ Helper method ---------------------------------------
        static AppDomain GetInternetSandbox()
        {
            // Create the permission set to grant to all assemblies.
            System.Security.Policy.Evidence hostEvidence = new System.Security.Policy.Evidence();
            hostEvidence.AddHostEvidence(new System.Security.Policy.Zone(
                                                         System.Security.SecurityZone.Internet));
            System.Security.PermissionSet pset =
                                System.Security.SecurityManager.GetStandardSandbox(hostEvidence);

            // Identify the folder to use for the sandbox.
            AppDomainSetup ads = new AppDomainSetup();
            ads.ApplicationBase = System.IO.Directory.GetCurrentDirectory();

            // Create the sandboxed application domain.
            return AppDomain.CreateDomain("Sandbox", hostEvidence, ads, pset, null);
        }
    }
}

/* This example produces output similar to the following:

Application domain 'Example.exe': IsFullyTrusted = True
   IsFullyTrusted = True for the current assembly
   IsFullyTrusted = True for mscorlib

Application domain 'Sandbox': IsFullyTrusted = False
   IsFullyTrusted = False for the current assembly
   IsFullyTrusted = True for mscorlib
 */

open System
open System.IO
open System.Security
open System.Security.Policy

type Worker() =
    inherit MarshalByRefObject()
    member _.TestIsFullyTrusted() =
        let ad = AppDomain.CurrentDomain
        printfn $"\nApplication domain '{ad.FriendlyName}': IsFullyTrusted = {ad.IsFullyTrusted}"

        printfn $"   IsFullyTrusted = {typeof<Worker>.Assembly.IsFullyTrusted} for the current assembly"

        printfn $"   IsFullyTrusted = {typeof<int>.Assembly.IsFullyTrusted} for mscorlib"

// ------------ Helper function ---------------------------------------
let getInternetSandbox () =
    // Create the permission set to grant to all assemblies.
    let hostEvidence = Evidence()
    hostEvidence.AddHostEvidence(Zone System.Security.SecurityZone.Internet)
    let pset = SecurityManager.GetStandardSandbox hostEvidence

    // Identify the folder to use for the sandbox.
    let ads = AppDomainSetup()
    ads.ApplicationBase <- Directory.GetCurrentDirectory()

    // Create the sandboxed application domain.
    AppDomain.CreateDomain("Sandbox", hostEvidence, ads, pset, null)

let w = Worker()
w.TestIsFullyTrusted()

let adSandbox = getInternetSandbox()
let w2 = 
    adSandbox.CreateInstanceAndUnwrap(typeof<Worker>.Assembly.FullName, typeof<Worker>.FullName) :?> Worker
w2.TestIsFullyTrusted()
(* This example produces output similar to the following:

Application domain 'Example.exe': IsFullyTrusted = True
   IsFullyTrusted = True for the current assembly
   IsFullyTrusted = True for mscorlib

Application domain 'Sandbox': IsFullyTrusted = False
   IsFullyTrusted = False for the current assembly
   IsFullyTrusted = True for mscorlib
 *)

Public Class Worker
    Inherits MarshalByRefObject
    
    Shared Sub Main()
 
        Dim w As New Worker()
        w.TestIsFullyTrusted()
        
        Dim adSandbox As AppDomain = GetInternetSandbox()
        w = CType(adSandbox.CreateInstanceAndUnwrap(
                            GetType(Worker).Assembly.FullName, 
                            GetType(Worker).FullName), 
                  Worker)
        w.TestIsFullyTrusted()
    
    End Sub 
    
    Public Sub TestIsFullyTrusted() 

        Dim ad As AppDomain = AppDomain.CurrentDomain
        Console.WriteLine(vbCrLf & "Application domain '{0}': IsFullyTrusted = {1}", 
                          ad.FriendlyName, ad.IsFullyTrusted)
        
        Console.WriteLine("   IsFullyTrusted = {0} for the current assembly", 
                          GetType(Worker).Assembly.IsFullyTrusted)
        
        Console.WriteLine("   IsFullyTrusted = {0} for mscorlib", 
                          GetType(Integer).Assembly.IsFullyTrusted)
    
    End Sub 
    
    ' ------------ Helper method ---------------------------------------
    Shared Function GetInternetSandbox() As AppDomain 

        ' Create the permission set to grant to all assemblies.
        Dim hostEvidence As New System.Security.Policy.Evidence()
        hostEvidence.AddHostEvidence(
                    New System.Security.Policy.Zone(System.Security.SecurityZone.Internet))
        Dim pset As System.Security.PermissionSet = 
                           System.Security.SecurityManager.GetStandardSandbox(hostEvidence)
        
        ' Identify the folder to use for the sandbox.
        Dim ads As New AppDomainSetup()
        ads.ApplicationBase = System.IO.Directory.GetCurrentDirectory()
        
        ' Create the sandboxed application domain.
        Return AppDomain.CreateDomain("Sandbox", hostEvidence, ads, pset, Nothing)
    
    End Function 
End Class 

' This example produces output similar to the following:
'
'Application domain 'Example.exe': IsFullyTrusted = True
'   IsFullyTrusted = True for the current assembly
'   IsFullyTrusted = True for mscorlib
'
'Application domain 'Sandbox': IsFullyTrusted = False
'   IsFullyTrusted = False for the current assembly
'   IsFullyTrusted = True for mscorlib
'

Comentários

Esse método sempre retorna true para o domínio de aplicativo padrão de um aplicativo executado na área de trabalho. Ele retorna false para um domínio de aplicativo em área restrita que foi criado usando a sobrecarga do AppDomain.CreateDomain(String, Evidence, AppDomainSetup, PermissionSet, StrongName[]) método, a menos que as permissões concedidas ao domínio do aplicativo sejam equivalentes à confiança total.