HostSecurityManager.DetermineApplicationTrust(Evidence, Evidence, TrustManagerContext) Metodo

Definizione

Determina se un'applicazione deve essere eseguita.Determines whether an application should be executed.

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
Public Overridable Function DetermineApplicationTrust (applicationEvidence As Evidence, activatorEvidence As Evidence, context As TrustManagerContext) As ApplicationTrust

Parametri

applicationEvidence
Evidence

Evidenza per l'applicazione da attivare.The evidence for the application to be activated.

activatorEvidence
Evidence

Facoltativamente, evidenza per il dominio applicazione da attivare.Optionally, the evidence for the activating application domain.

context
TrustManagerContext

Contesto di attendibilità.The trust context.

Restituisce

Oggetto che contiene informazioni di attendibilità sull'applicazione.An object that contains trust information about the application.

Attributi

Eccezioni

applicationEvidence è null.applicationEvidence is null.

Non è possibile trovare un oggetto ActivationArguments nell'evidenza di applicazione.An ActivationArguments object could not be found in the application evidence.

-oppure--or- La proprietà ActivationContext negli argomenti di attivazione è null.The ActivationContext property in the activation arguments is null.

L'insieme delle autorizzazioni di ApplicationTrust non contiene l'insieme di richieste minimo specificato dall'oggetto ActivationContext.The ApplicationTrust grant set does not contain the minimum request set specified by the ActivationContext.

Esempi

Nell'esempio seguente viene illustrato come eseguire l'override del metodo DetermineApplicationTrust per un gestore sicurezza host personalizzato.The following example shows how to override the DetermineApplicationTrust method for a custom host security manager. Questo esempio fa parte di un esempio più ampio fornito per la classe HostSecurityManager.This example is part of a larger example provided for the HostSecurityManager class.

[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

Commenti

Questo metodo può essere sottoposto a override da una classe derivata.This method can be overridden by a derived class. Tramite l'implementazione di base viene chiamato il gestore della sicurezza dell'applicazione per determinare se l'applicazione deve essere eseguita.The base implementation calls the application security manager to determine if the application should be executed.

L'implementazione di base non utilizza l'evidenza Activator.The base implementation does not use the activator evidence. Tuttavia, un'implementazione sottoposta a override può utilizzare l'evidenza Activator per determinare l'evidenza di sicurezza per il dominio dell'applicazione che tenta di attivare l'applicazione.However, an overridden implementation could use the activator evidence to determine the security evidence for the application domain attempting to activate the application.

Si applica a