HostSecurityManager.DetermineApplicationTrust 方法

定義

命名空間:

System.Security

組件:

System.Security.Permissions.dll

套件:

System.Security.Permissions v9.0.0-rc.2.24473.5

來源:

HostSecurityManager.cs

決定是否應該執行應用程式。

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);

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

參數

applicationEvidence

Evidence

要啟動之應用程式的辨識項。

activatorEvidence

Evidence

或者，啟動中應用程式定義域的辨識項。

context

TrustManagerContext

信任內容。

傳回

ApplicationTrust

包含應用程式相關信任資訊的物件。

例外狀況

ArgumentNullException

applicationEvidence 為 null。

ArgumentException

在應用程式辨識項中找不到 ActivationArguments 物件。

-或-

啟動引數的 ActivationContext 屬性是 null。

InvalidOperationException

ApplicationTrust 授權集不包含 ActivationContext 所指定的最小要求集。

範例

下列範例示範如何覆寫 DetermineApplicationTrust 自定義主機安全性管理員的方法。 這個範例是提供給 類別之較大範例的 HostSecurityManager 一部分。

[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

備註

這個方法可由衍生類別覆寫。 基底實作會呼叫應用程式安全性管理員，以判斷是否應該執行應用程式。

基底實作不會使用啟動器辨識項。 不過，覆寫的實作可以使用啟動程式辨識項來判斷嘗試啟動應用程式之應用程式域的安全性辨識項。