PermissionSetAttribute Clase
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Precaución
Code Access Security is not supported or honored by the runtime.
Permite aplicar acciones de seguridad para PermissionSet en el código mediante el uso de la seguridad declarativa. Esta clase no puede heredarse.
public ref class PermissionSetAttribute sealed : System::Security::Permissions::CodeAccessSecurityAttribute[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
public sealed class PermissionSetAttribute : System.Security.Permissions.CodeAccessSecurityAttribute[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, 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 PermissionSetAttribute : System.Security.Permissions.CodeAccessSecurityAttribute[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
[System.Serializable]
public sealed class PermissionSetAttribute : System.Security.Permissions.CodeAccessSecurityAttribute[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class PermissionSetAttribute : System.Security.Permissions.CodeAccessSecurityAttribute[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
type PermissionSetAttribute = class
inherit CodeAccessSecurityAttribute[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, 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 PermissionSetAttribute = class
inherit CodeAccessSecurityAttribute[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
[<System.Serializable>]
type PermissionSetAttribute = class
inherit CodeAccessSecurityAttribute[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type PermissionSetAttribute = class
inherit CodeAccessSecurityAttributePublic NotInheritable Class PermissionSetAttribute
Inherits CodeAccessSecurityAttribute- Herencia
- Atributos
Ejemplos
En el ejemplo siguiente se muestra el uso de la PermissionSetAttribute clase .
// The #define statement for BuildFile must be included the first time this sample is run.
// This causes the sample to create a file named 'LocalIntranet.xml' in the c:\temp folder.
// After creating the LocalInternet.xml file, comment out the #define statement and rerun
// the sample to demonstrate the use of the permission set attribute.
#define BuildFile
using System;
using System.Security;
using System.Security.Permissions;
using System.Security.Policy;
using System.Collections;
using System.IO;
namespace PermissionSetAttributeDemo
{
class Class1
{
[STAThread]
static void Main(string[] args)
{
// Run this sample with the BuildFile symbol defined to create the required file, then
// comment out the #define statement to demonstrate the use of the attribute.
#if(BuildFile)
using (StreamWriter sw = new StreamWriter("c:\\temp\\LocalIntranet.xml"))
{
sw.WriteLine(GetNamedPermissionSet("LocalIntranet"));
sw.Close();
}
#endif
#if(!BuildFile)
ReadFile1();
ReadFile2();
ReadFile3();
Console.WriteLine("Press the Enter key to exit.");
Console.Read();
#endif
}
#if(!BuildFile)
// Read the LocalIntranet.xml file.
static void ReadFile1()
{
try
{
Console.WriteLine("Attempting to read a file using the FullTrust permission set.");
using (StreamReader sr = new StreamReader("c:\\temp\\LocalIntranet.xml"))
{
string permissionSet = sr.ReadToEnd();
sr.Close();
}
Console.WriteLine("The file was successfully read.");
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
[PermissionSetAttribute(SecurityAction.PermitOnly, File = "c:\\temp\\LocalIntranet.xml")]
// Read the file with the specified security action on the file path.
static void ReadFile2()
{
try
{
Console.WriteLine("Attempting to read a file using the LocalIntranet permission set.");
using (StreamReader sr = new StreamReader("c:\\temp\\LocalIntranet.xml"))
{
string permissionSet = sr.ReadToEnd();
sr.Close();
}
Console.WriteLine("The file was successfully read.");
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
[PermissionSetAttribute(SecurityAction.PermitOnly, Name = "LocalIntranet")]
// Read the file with the specified security action on the permission set.
static void ReadFile3()
{
try
{
Console.WriteLine("\nSecond attempt to read a file using " +
"the LocalIntranet permission set.");
using (StreamReader sr = new StreamReader("c:\\temp\\LocalIntranet.xml"))
{
string permissionSet = sr.ReadToEnd();
sr.Close();
}
Console.WriteLine("The file was successfully read.");
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
#endif
// Locate the named permission set at the Machine level and return it as a string value.
private static string GetNamedPermissionSet(string name)
{
IEnumerator policyEnumerator = SecurityManager.PolicyHierarchy();
// Move through the policy levels to the Machine Level.
while(policyEnumerator.MoveNext())
{
PolicyLevel currentLevel = (PolicyLevel)policyEnumerator.Current;
if(currentLevel.Label == "Machine")
{
// Iterate through the permission sets at the Machine level.
IList namedPermissions = currentLevel.NamedPermissionSets;
IEnumerator namedPermission = namedPermissions.GetEnumerator();
// Locate the named permission set.
while(namedPermission.MoveNext())
{
if(((NamedPermissionSet)namedPermission.Current).Name == name)
{
return ((NamedPermissionSet)namedPermission.Current).ToString();
}
}
}
}
return null;
}
}
}
//
// This sample produces the following output:
//
// File created at c:\temp\LocalIntranet.xml
// Uncomment the BuildFile=false line and run the sample again.
//
// This sample completed successfully; press Exit to continue.
//
//
// The second time the sample is ran (without DEBUG flag):
//
// Attempting to read a file using the FullTrust permission set.
// The file was successfully read.
// Attempting to read a file using the LocalIntranet permission set.
// Request for the permission of type
// System.Security.Permissions.FileIOPermission, mscorlib, Version=1.0.5000.0,
// Culture=neutral, PublicKeyToken=b77a5c561934e089 failed.
//
// Second attempt to read a file using the LocalIntranet permission set.
// Request for the permission of type System.Security.Permissions.FileIOPermission,
// mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
// failed.
// Press the Enter key to exit.
' The #Const BuildFile = True statement must be active the first time this
' sample is run. This causes the sample to create a file named
' 'LocalIntranet.xml' in the c:\temp folder. After creating the
' LocalInternet.xml file, comment out the #Const BUILDFILE = True statement,
' uncomment the #Const BUILDFILE = False statement, and rerun the sample to
' demonstrate the use of the permission set attribute.
Imports System.Security
Imports System.Security.Permissions
Imports System.Security.Policy
Imports System.Collections
Imports System.IO
#Const BUILDFILE = True
'#Const BUILDFILE = False
Public Class Form1
Inherits System.Windows.Forms.Form
' Event handler for Run button.
<STAThread()> _
Private Sub Button1_Click( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
tbxOutput.Cursor = Cursors.WaitCursor
tbxOutput.Text = ""
Dim xmlFilePath As String
xmlFilePath = "c:\temp\LocalIntranet.xml"
' Run this sample with the BuildFile symbol defined to create the
' required file, then comment out the /define statement to demonstrate
' the use of the attribute.
#If (BUILDFILE) Then
Dim sw As New StreamWriter(xmlFilePath)
Try
sw.WriteLine(GetNamedPermissionSet("LocalIntranet"))
WriteLine("File created at " + xmlFilePath)
WriteLine("Uncomment the BuildFile=false line and " + _
"run the sample again.")
Finally
sw.Close()
End Try
#End If
#If (Not BUILDFILE) Then
ReadFile1()
ReadFile2()
ReadFile3()
#End If
' Align interface and conclude application.
WriteLine(vbCrLf + "This sample completed successfully;" + _
" press Exit to continue.")
' Reset the cursor.
tbxOutput.Cursor = Cursors.Default
End Sub
#If (Not BUILDFILE) Then
' Read the LocalIntranet.xml file.
Private Sub ReadFile1()
Try
WriteLine("Attempting to read a file using the FullTrust " + _
"permission set.")
Dim sr As New StreamReader("c:\temp\LocalIntranet.xml")
Try
Dim permissionSet As String = sr.ReadToEnd()
Finally
sr.Close()
End Try
WriteLine("The file was successfully read.")
Catch e As Exception
WriteLine(e.Message)
End Try
End Sub
<System.Security.Permissions.PermissionSetAttribute( _
SecurityAction.PermitOnly, _
File:="c:\temp\LocalIntranet.xml")> _
Private Sub ReadFile2()
' Read the file with the specified security action on the file path.
Try
WriteLine("Attempting to read a file using the LocalIntranet " + _
"permission set.")
Dim sr As New StreamReader("c:\temp\LocalIntranet.xml")
Try
Dim permissionSet As String = sr.ReadToEnd()
Finally
sr.Close()
End Try
WriteLine("The file was successfully read.")
Catch e As Exception
WriteLine(e.Message)
End Try
End Sub
<System.Security.Permissions.PermissionSetAttribute( _
SecurityAction.PermitOnly, _
Name:="LocalIntranet")> _
Private Sub ReadFile3()
' Read the file with the specified security action on the
' permission set.
Try
WriteLine("Second attempt to read a file using the " + _
"LocalIntranet permission set.")
Dim sr As New StreamReader("c:\temp\LocalIntranet.xml")
Try
Dim permissionSet As String = sr.ReadToEnd()
Finally
sr.Close()
End Try
WriteLine("The file was successfully read.")
Catch e As Exception
WriteLine(e.Message)
End Try
End Sub
#End If
' Locate the named permission set at the Machine level and return it as
' a string value.
Private Shared Function GetNamedPermissionSet( _
ByVal name As String) As String
Dim policyEnumerator As IEnumerator
policyEnumerator = SecurityManager.PolicyHierarchy()
' Move through the policy levels to the Machine Level.
While policyEnumerator.MoveNext()
Dim currentLevel As PolicyLevel
currentLevel = CType(policyEnumerator.Current, PolicyLevel)
If currentLevel.Label = "Machine" Then
' Iterate through the permission sets at the Machine level.
Dim namedPermissions As IList
namedPermissions = currentLevel.NamedPermissionSets
Dim namedPermission As IEnumerator
namedPermission = namedPermissions.GetEnumerator()
Dim currentPermission As NamedPermissionSet
' Locate the named permission set.
While namedPermission.MoveNext()
currentPermission = CType( _
namedPermission.Current, _
NamedPermissionSet)
If currentPermission.Name.Equals(name) Then
Return currentPermission.ToString()
End If
End While
End If
End While
Return Nothing
End Function
' Write specified message and carriage return to the output textbox.
Private Sub WriteLine(ByVal message As String)
tbxOutput.AppendText(message + vbCrLf)
End Sub
' Event handler for Exit button.
Private Sub Button2_Click( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button2.Click
Application.Exit()
End Sub
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents Panel2 As System.Windows.Forms.Panel
Friend WithEvents Panel1 As System.Windows.Forms.Panel
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents Button2 As System.Windows.Forms.Button
Friend WithEvents tbxOutput As System.Windows.Forms.RichTextBox
<System.Diagnostics.DebuggerStepThrough()> _
Private Sub InitializeComponent()
Me.Panel2 = New System.Windows.Forms.Panel
Me.Button1 = New System.Windows.Forms.Button
Me.Button2 = New System.Windows.Forms.Button
Me.Panel1 = New System.Windows.Forms.Panel
Me.tbxOutput = New System.Windows.Forms.RichTextBox
Me.Panel2.SuspendLayout()
Me.Panel1.SuspendLayout()
Me.SuspendLayout()
'
'Panel2
'
Me.Panel2.Controls.Add(Me.Button1)
Me.Panel2.Controls.Add(Me.Button2)
Me.Panel2.Dock = System.Windows.Forms.DockStyle.Bottom
Me.Panel2.DockPadding.All = 20
Me.Panel2.Location = New System.Drawing.Point(0, 320)
Me.Panel2.Name = "Panel2"
Me.Panel2.Size = New System.Drawing.Size(616, 64)
Me.Panel2.TabIndex = 1
'
'Button1
'
Me.Button1.Dock = System.Windows.Forms.DockStyle.Right
Me.Button1.Font = New System.Drawing.Font( _
"Microsoft Sans Serif", _
9.0!, _
System.Drawing.FontStyle.Regular, _
System.Drawing.GraphicsUnit.Point, _
CType(0, Byte))
Me.Button1.Location = New System.Drawing.Point(446, 20)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(75, 24)
Me.Button1.TabIndex = 2
Me.Button1.Text = "&Run"
'
'Button2
'
Me.Button2.Dock = System.Windows.Forms.DockStyle.Right
Me.Button2.Font = New System.Drawing.Font( _
"Microsoft Sans Serif", _
9.0!, _
System.Drawing.FontStyle.Regular, _
System.Drawing.GraphicsUnit.Point, _
CType(0, Byte))
Me.Button2.Location = New System.Drawing.Point(521, 20)
Me.Button2.Name = "Button2"
Me.Button2.Size = New System.Drawing.Size(75, 24)
Me.Button2.TabIndex = 3
Me.Button2.Text = "E&xit"
'
'Panel1
'
Me.Panel1.Controls.Add(Me.tbxOutput)
Me.Panel1.Dock = System.Windows.Forms.DockStyle.Fill
Me.Panel1.DockPadding.All = 20
Me.Panel1.Location = New System.Drawing.Point(0, 0)
Me.Panel1.Name = "Panel1"
Me.Panel1.Size = New System.Drawing.Size(616, 320)
Me.Panel1.TabIndex = 2
'
'tbxOutput
'
Me.tbxOutput.AccessibleDescription = _
"Displays output from application."
Me.tbxOutput.AccessibleName = "Output textbox."
Me.tbxOutput.Dock = System.Windows.Forms.DockStyle.Fill
Me.tbxOutput.Location = New System.Drawing.Point(20, 20)
Me.tbxOutput.Name = "tbxOutput"
Me.tbxOutput.Size = New System.Drawing.Size(576, 280)
Me.tbxOutput.TabIndex = 1
Me.tbxOutput.Text = "Click the Run button to run the application."
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15)
Me.ClientSize = New System.Drawing.Size(616, 384)
Me.Controls.Add(Me.Panel1)
Me.Controls.Add(Me.Panel2)
Me.Name = "Form1"
Me.Text = "PermisstionSetAttribute"
Me.Panel2.ResumeLayout(False)
Me.Panel1.ResumeLayout(False)
Me.ResumeLayout(False)
End Sub
#End Region
End Class
'
' This sample produces the following output:
'
' File created at c:\temp\LocalIntranet.xml
' Uncomment the BuildFile=false line and run the sample again.
'
' This sample completed successfully; press Exit to continue.
'
'
' The second time the sample is ran (without DEBUG flag):
'
' Attempting to read a file using the FullTrust permission set.
' The file was successfully read.
' Attempting to read a file using the LocalIntranet permission set.
' Request for the permission of type
' System.Security.Permissions.FileIOPermission, mscorlib, Version=1.0.5000.0,
' Culture=neutral, PublicKeyToken=b77a5c561934e089 failed.
'
' Second attempt to read a file using the LocalIntranet permission set.
' Request for the permission of type System.Security.Permissions.FileIOPermission,
' mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
' failed.
' This sample completed successfully; press Exit to continue.
Comentarios
Precaución
La seguridad de acceso del código (CAS) ha quedado en desuso en todas las versiones de .NET Framework y .NET. Las versiones recientes de .NET no respetan las anotaciones de CAS y generan errores si se usan API relacionadas con CAS. Los desarrolladores deben buscar medios alternativos para realizar tareas de seguridad.
Las PermissionSetAttribute propiedades Name, Filey XML son mutuamente excluyentes, lo que significa que un conjunto de permisos puede tener como origen solo uno de los siguientes: un conjunto de permisos con nombre, un archivo que contiene una representación XML de un conjunto de permisos o una cadena que contiene una representación XML de un conjunto de permisos.
El ámbito de la declaración que se permite depende del SecurityAction que se use. Un SecurityAction objeto realizado en es PermissionSet el equivalente de realizar esa acción en cada uno de los permisos del conjunto.
La información de seguridad declarada por un atributo de seguridad se almacena en los metadatos del destino del atributo y el sistema accede a ella en tiempo de ejecución. Los atributos de seguridad solo se usan para la seguridad declarativa. Para la seguridad imperativa, use la clase de permiso correspondiente.
Constructores
| PermissionSetAttribute(SecurityAction) |
Obsoletos.
Inicializa una nueva instancia de la clase PermissionSetAttribute con la acción de seguridad especificada. |
Propiedades
| Action |
Obsoletos.
Obtiene o establece una acción de seguridad. (Heredado de SecurityAttribute) |
| File |
Obsoletos.
Obtiene o establece un archivo que contiene la representación XML de un conjunto de permisos personalizado que va a declararse. |
| Hex |
Obsoletos.
Obtiene o establece la representación hexadecimal del conjunto de permisos en código XML. |
| Name |
Obsoletos.
Obtiene o establece el nombre del conjunto de permisos. |
| TypeId |
Obsoletos.
Cuando se implementa en una clase derivada, obtiene un identificador único para este Attribute. (Heredado de Attribute) |
| UnicodeEncoded |
Obsoletos.
Obtiene o establece un valor que indica si el archivo especificado por File está codificado en Unicode o en ASCII. |
| Unrestricted |
Obsoletos.
Obtiene o establece un valor que indica si se declara el permiso completo (sin restricciones) al recurso protegido por el atributo. (Heredado de SecurityAttribute) |
| XML |
Obsoletos.
Obtiene o establece la representación XML de un conjunto de permisos. |
Métodos
| CreatePermission() |
Obsoletos.
Este método no se utiliza. |
| CreatePermissionSet() |
Obsoletos.
Crea y devuelve un nuevo conjunto de permisos basándose en este objeto de atributo del conjunto de permisos. |
| Equals(Object) |
Obsoletos.
Devuelve un valor que indica si esta instancia es igual que un objeto especificado. (Heredado de Attribute) |
| GetHashCode() |
Obsoletos.
Devuelve el código hash de esta instancia. (Heredado de Attribute) |
| GetType() |
Obsoletos.
Obtiene el Type de la instancia actual. (Heredado de Object) |
| IsDefaultAttribute() |
Obsoletos.
Si se reemplaza en una clase derivada, indica si el valor de esta instancia es el valor predeterminado de la clase derivada. (Heredado de Attribute) |
| Match(Object) |
Obsoletos.
Cuando se invalida en una clase derivada, devuelve un valor que indica si esta instancia es igual a un objeto especificado. (Heredado de Attribute) |
| MemberwiseClone() |
Obsoletos.
Crea una copia superficial del Object actual. (Heredado de Object) |
| ToString() |
Obsoletos.
Devuelve una cadena que representa el objeto actual. (Heredado de Object) |
Implementaciones de interfaz explícitas
| _Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) |
Obsoletos.
Asigna un conjunto de nombres a un conjunto correspondiente de identificadores de envío. (Heredado de Attribute) |
| _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) |
Obsoletos.
Obtiene la información de tipos de un objeto, que puede utilizarse para obtener la información de tipos de una interfaz. (Heredado de Attribute) |
| _Attribute.GetTypeInfoCount(UInt32) |
Obsoletos.
Recupera el número de interfaces de información de tipo que proporciona un objeto (0 ó 1). (Heredado de Attribute) |
| _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) |
Obsoletos.
Proporciona acceso a las propiedades y los métodos expuestos por un objeto. (Heredado de Attribute) |
Se aplica a
Consulte también
Comentarios
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