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HostSecurityManager.DetermineApplicationTrust Método

Definición

Determina si se debe ejecutar una aplicación.

public:
 virtual System::Security::Policy::ApplicationTrust ^ DetermineApplicationTrust(System::Security::Policy::Evidence ^ applicationEvidence, System::Security::Policy::Evidence ^ activatorEvidence, System::Security::Policy::TrustManagerContext ^ context);
public virtual System.Security.Policy.ApplicationTrust DetermineApplicationTrust (System.Security.Policy.Evidence applicationEvidence, System.Security.Policy.Evidence activatorEvidence, System.Security.Policy.TrustManagerContext context);
[System.Security.SecurityCritical]
public virtual System.Security.Policy.ApplicationTrust DetermineApplicationTrust (System.Security.Policy.Evidence applicationEvidence, System.Security.Policy.Evidence activatorEvidence, System.Security.Policy.TrustManagerContext context);
abstract member DetermineApplicationTrust : System.Security.Policy.Evidence * System.Security.Policy.Evidence * System.Security.Policy.TrustManagerContext -> System.Security.Policy.ApplicationTrust
override this.DetermineApplicationTrust : System.Security.Policy.Evidence * System.Security.Policy.Evidence * System.Security.Policy.TrustManagerContext -> System.Security.Policy.ApplicationTrust
[<System.Security.SecurityCritical>]
abstract member DetermineApplicationTrust : System.Security.Policy.Evidence * System.Security.Policy.Evidence * System.Security.Policy.TrustManagerContext -> System.Security.Policy.ApplicationTrust
override this.DetermineApplicationTrust : System.Security.Policy.Evidence * System.Security.Policy.Evidence * System.Security.Policy.TrustManagerContext -> System.Security.Policy.ApplicationTrust
Public Overridable Function DetermineApplicationTrust (applicationEvidence As Evidence, activatorEvidence As Evidence, context As TrustManagerContext) As ApplicationTrust

Parámetros

applicationEvidence
Evidence

Evidencia para la aplicación que se va a activar.

activatorEvidence
Evidence

Opcionalmente, evidencia para el dominio de aplicación que realiza la activación.

context
TrustManagerContext

Contexto de confianza.

Devoluciones

Objeto que contiene información de confianza sobre la aplicación.

Atributos

Excepciones

applicationEvidence es null.

No se pudo encontrar un objeto ActivationArguments en la evidencia de la aplicación.

o bien

La propiedad ActivationContext de los argumentos de activación es null.

El conjunto de permisos ApplicationTrust concedido no contiene el conjunto de solicitudes mínimo especificado por ActivationContext.

Ejemplos

En el ejemplo siguiente se muestra cómo invalidar el DetermineApplicationTrust método para un administrador de seguridad de host personalizado. Este ejemplo forma parte de un ejemplo más grande proporcionado para la HostSecurityManager clase .

[SecurityPermissionAttribute(SecurityAction.Demand, Execution = true)]
[SecurityPermissionAttribute(SecurityAction.Assert, Unrestricted = true)]
public override ApplicationTrust DetermineApplicationTrust(Evidence applicationEvidence, Evidence activatorEvidence, TrustManagerContext context)
{
    if (applicationEvidence == null)
        throw new ArgumentNullException("applicationEvidence");

    // Get the activation context from the application evidence.
    // This HostSecurityManager does not examine the activator evidence
    // nor is it concerned with the TrustManagerContext;
    // it simply grants the requested grant in the application manifest.

    IEnumerator enumerator = applicationEvidence.GetHostEnumerator();
    ActivationArguments activationArgs = null;
    while (enumerator.MoveNext())
    {
        activationArgs = enumerator.Current as ActivationArguments;
        if (activationArgs != null)
            break;
    }

    if (activationArgs == null)
        return null;

    ActivationContext activationContext = activationArgs.ActivationContext;
    if (activationContext == null)
        return null;

    ApplicationTrust trust = new ApplicationTrust(activationContext.Identity);
    ApplicationSecurityInfo asi = new ApplicationSecurityInfo(activationContext);
    trust.DefaultGrantSet = new PolicyStatement(asi.DefaultRequestSet, PolicyStatementAttribute.Nothing);
    trust.IsApplicationTrustedToRun = true;
    return trust;
}
    <SecurityPermissionAttribute(SecurityAction.Demand, Execution:=True), SecurityPermissionAttribute(SecurityAction.Assert, Unrestricted:=True)> _
    Public Overrides Function DetermineApplicationTrust(ByVal applicationEvidence As Evidence, ByVal activatorEvidence As Evidence, ByVal context As TrustManagerContext) As ApplicationTrust
        If applicationEvidence Is Nothing Then
            Throw New ArgumentNullException("applicationEvidence")
        End If
        ' Get the activation context from the application evidence.
        ' This HostSecurityManager does not examine the activator evidence
        ' nor is it concerned with the TrustManagerContext;
        ' it simply grants the requested grant in the application manifest.
        Dim enumerator As IEnumerator = applicationEvidence.GetHostEnumerator()
        Dim activationArgs As ActivationArguments = Nothing
        While enumerator.MoveNext()
            activationArgs = enumerator.Current '
            If Not (activationArgs Is Nothing) Then
                Exit While
            End If
        End While
        If activationArgs Is Nothing Then
            Return Nothing
        End If
        Dim activationContext As ActivationContext = activationArgs.ActivationContext
        If activationContext Is Nothing Then
            Return Nothing
        End If
        Dim trust As New ApplicationTrust(activationContext.Identity)
        Dim asi As New ApplicationSecurityInfo(activationContext)
        trust.DefaultGrantSet = New PolicyStatement(asi.DefaultRequestSet, PolicyStatementAttribute.Nothing)
        trust.IsApplicationTrustedToRun = True
        Return trust

    End Function 'DetermineApplicationTrust
End Class

Comentarios

Este método se puede invalidar mediante una clase derivada. La implementación base llama al administrador de seguridad de aplicaciones para determinar si se debe ejecutar la aplicación.

La implementación base no usa la evidencia activator. Sin embargo, una implementación invalidada podría usar la evidencia del activador para determinar la evidencia de seguridad para el dominio de aplicación que intenta activar la aplicación.

Se aplica a