RegistrySecurity.SetAccessRule(RegistryAccessRule) Método

Definición

Espacio de nombres:

System.Security.AccessControl

Ensamblado:

Microsoft.Win32.Registry.dll

Quita todas las reglas de control de acceso con el mismo usuario y AccessControlType (conceder o denegar) que la regla especificada y, a continuación, agrega la regla especificada.

public:
 void SetAccessRule(System::Security::AccessControl::RegistryAccessRule ^ rule);

public void SetAccessRule (System.Security.AccessControl.RegistryAccessRule rule);

override this.SetAccessRule : System.Security.AccessControl.RegistryAccessRule -> unit

Public Sub SetAccessRule (rule As RegistryAccessRule)

Parámetros

rule

RegistryAccessRule

RegistryAccessRule que se va a agregar. El usuario y el objeto AccessControlType de esta regla determinan las reglas que se van a quitar antes de agregar esta regla.

Excepciones

ArgumentNullException

rule es null.

Ejemplos

En el ejemplo de código siguiente se muestra que el SetAccessRule método quita todas las reglas que coinciden tanto con el usuario como con AccessControlType , ruleignorando los derechos y las marcas, y las reemplaza por rule.

En el ejemplo se crea un RegistrySecurity objeto y se agregan reglas que permiten y deniegan varios derechos para el usuario actual, con marcas de herencia y propagación diferentes. A continuación, el ejemplo crea una nueva regla que permite al usuario actual leer la clave y usa el SetAccessRule método para quitar las dos reglas que permiten el acceso y reemplazarlas por la nueva regla. La regla que deniega el acceso no se ve afectada.

Nota

En este ejemplo no se adjunta el objeto de seguridad a un RegistryKey objeto . Vea el RegistryKey.GetAccessControl método y el RegistryKey.SetAccessControl método .

using System;
using System.Security.AccessControl;
using System.Security.Principal;
using System.Security;
using Microsoft.Win32;

public class Example
{
    public static void Main()
    {
        string user = Environment.UserDomainName + "\\"
            + Environment.UserName;

        // Create a security object that grants no access.
        RegistrySecurity mSec = new RegistrySecurity();

        // Add a rule that grants the current user the right
        // to read and enumerate the name/value pairs in a key, 
        // to read its access and audit rules, to enumerate
        // its subkeys, to create subkeys, and to delete the key. 
        // The rule is inherited by all contained subkeys.
        //
        RegistryAccessRule rule = new RegistryAccessRule(user, 
            RegistryRights.ReadKey | RegistryRights.WriteKey
                | RegistryRights.Delete, 
            InheritanceFlags.ContainerInherit, 
            PropagationFlags.None, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule);

        // Add a rule that allows the current user the right
        // right to set the name/value pairs in a key. 
        // This rule is inherited by contained subkeys, but
        // propagation flags limit it to immediate child 
        // subkeys.
        rule = new RegistryAccessRule(user, 
            RegistryRights.ChangePermissions,
            InheritanceFlags.ContainerInherit,
            PropagationFlags.InheritOnly | PropagationFlags.NoPropagateInherit, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule);

        // Add a rule that denies the current user the right
        // to set the name/value pairs in a key. This rule
        // has no inheritance or propagation flags, so it 
        // affects only the key itself.
        rule = new RegistryAccessRule(user,
            RegistryRights.SetValue,
            AccessControlType.Deny);
        mSec.AddAccessRule(rule);

        // Display the rules in the security object.
        ShowSecurity(mSec);

        // Create a rule that allows the current user  
        // only read access to a key, with no inheritance 
        // or propagation flags. SetAccessRule removes
        // all the existing rules that allow access for
        // the current user, replacing them with this
        // rule. Rules that deny access do not match,
        // and so are not affected.
        rule = new RegistryAccessRule(user, 
            RegistryRights.ReadKey, 
            AccessControlType.Allow);
        mSec.SetAccessRule(rule);

        // Display the rules in the security object.
        // removed.
        ShowSecurity(mSec);
    }

    private static void ShowSecurity(RegistrySecurity security)
    {
        Console.WriteLine("\r\nCurrent access rules:\r\n");

        foreach( RegistryAccessRule ar in 
            security.GetAccessRules(true, true, typeof(NTAccount)) )
        {
            Console.WriteLine("        User: {0}", ar.IdentityReference);
            Console.WriteLine("        Type: {0}", ar.AccessControlType);
            Console.WriteLine("      Rights: {0}", ar.RegistryRights);
            Console.WriteLine(" Inheritance: {0}", ar.InheritanceFlags);
            Console.WriteLine(" Propagation: {0}", ar.PropagationFlags);
            Console.WriteLine("   Inherited? {0}", ar.IsInherited);
            Console.WriteLine();
        }
    }
}

/* This code example produces output similar to following:

Current access rules:

        User: TestDomain\TestUser
        Type: Deny
      Rights: SetValue
 Inheritance: None
 Propagation: None
   Inherited? False

        User: TestDomain\TestUser
        Type: Allow
      Rights: SetValue, CreateSubKey, Delete, ReadKey
 Inheritance: ContainerInherit
 Propagation: None
   Inherited? False

        User: TestDomain\TestUser
        Type: Allow
      Rights: ChangePermissions
 Inheritance: ContainerInherit
 Propagation: NoPropagateInherit, InheritOnly
   Inherited? False


Current access rules:

        User: TestDomain\TestUser
        Type: Deny
      Rights: SetValue
 Inheritance: None
 Propagation: None
   Inherited? False

        User: TestDomain\TestUser
        Type: Allow
      Rights: ReadKey
 Inheritance: None
 Propagation: None
   Inherited? False
*/

Option Explicit
Imports System.Security.AccessControl
Imports System.Security.Principal
Imports System.Security
Imports Microsoft.Win32

Public Class Example

    Public Shared Sub Main()

        Dim user As String = Environment.UserDomainName _ 
            & "\" & Environment.UserName

        ' Create a security object that grants no access.
        Dim mSec As New RegistrySecurity()

        ' Add a rule that grants the current user the right
        ' to read and enumerate the name/value pairs in a key, 
        ' to read its access and audit rules, to enumerate
        ' its subkeys, to create subkeys, and to delete the key. 
        ' The rule is inherited by all contained subkeys.
        '
        Dim rule As New RegistryAccessRule(user, _
            RegistryRights.ReadKey Or RegistryRights.WriteKey _
                Or RegistryRights.Delete, _
            InheritanceFlags.ContainerInherit, _
            PropagationFlags.None, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule)

        ' Add a rule that allows the current user the right
        ' right to set the name/value pairs in a key. 
        ' This rule is inherited by contained subkeys, but
        ' propagation flags limit it to immediate child 
        ' subkeys.
        rule = New RegistryAccessRule(user, _
            RegistryRights.ChangePermissions, _
            InheritanceFlags.ContainerInherit, _
            PropagationFlags.InheritOnly Or PropagationFlags.NoPropagateInherit, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule)

        ' Add a rule that denies the current user the right
        ' to set the name/value pairs in a key. This rule
        ' has no inheritance or propagation flags, so it 
        ' affects only the key itself.
        rule = New RegistryAccessRule(user, _
            RegistryRights.SetValue, _
            AccessControlType.Deny)
        mSec.AddAccessRule(rule)

        ' Display the rules in the security object.
        ShowSecurity(mSec)

        ' Create a rule that allows the current user  
        ' only read access to a key, with no inheritance 
        ' or propagation flags. SetAccessRule removes
        ' all the existing rules that allow access for
        ' the current user, replacing them with this
        ' rule. Rules that deny access do not match,
        ' and so are not affected.
        rule = New RegistryAccessRule(user, _
            RegistryRights.ReadKey, _
            AccessControlType.Allow)
        mSec.SetAccessRule(rule)

        ' Display the rules in the security object.
        ShowSecurity(mSec)

    End Sub 

    Private Shared Sub ShowSecurity(ByVal security As RegistrySecurity)
        Console.WriteLine(vbCrLf & "Current access rules:" & vbCrLf)

        For Each ar As RegistryAccessRule In _
            security.GetAccessRules(True, True, GetType(NTAccount))

            Console.WriteLine("        User: {0}", ar.IdentityReference)
            Console.WriteLine("        Type: {0}", ar.AccessControlType)
            Console.WriteLine("      Rights: {0}", ar.RegistryRights)
            Console.WriteLine(" Inheritance: {0}", ar.InheritanceFlags)
            Console.WriteLine(" Propagation: {0}", ar.PropagationFlags)
            Console.WriteLine("   Inherited? {0}", ar.IsInherited)
            Console.WriteLine()
        Next

    End Sub
End Class 

'This code example produces output similar to following:
'
'Current access rules:
'
'        User: TestDomain\TestUser
'        Type: Deny
'      Rights: SetValue
' Inheritance: None
' Propagation: None
'   Inherited? False
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: SetValue, CreateSubKey, Delete, ReadKey
' Inheritance: ContainerInherit
' Propagation: None
'   Inherited? False
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: ChangePermissions
' Inheritance: ContainerInherit
' Propagation: NoPropagateInherit, InheritOnly
'   Inherited? False
'
'
'Current access rules:
'
'        User: TestDomain\TestUser
'        Type: Deny
'      Rights: SetValue
' Inheritance: None
' Propagation: None
'   Inherited? False
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: ReadKey
' Inheritance: None
' Propagation: None
'   Inherited? False

Comentarios

Si la regla especificada tiene Allow, el efecto de este método es quitar todas las Allow reglas del usuario especificado y reemplazarlas por la regla especificada. Si la regla especificada tiene Deny, todas las Deny reglas del usuario especificado se reemplazan por la regla especificada.

Si no hay ninguna regla cuyo usuario y AccessControlType coincida con la regla especificada, rule se agrega.