RegistrySecurity.ResetAccessRule(RegistryAccessRule) 方法

定义

命名空间:

System.Security.AccessControl

程序集:

Microsoft.Win32.Registry.dll

不论 AccessControlType 如何，移除与指定的规则具有相同用户的所有访问控制规则，然后添加指定的规则。

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

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

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

Public Sub ResetAccessRule (rule As RegistryAccessRule)

参数

rule

RegistryAccessRule

要添加的 RegistryAccessRule。 由此规则指定的用户确定在添加此规则之前要移除的规则。

示例

下面的代码示例演示了 方法如何将 ResetAccessRule 匹配用户的所有规则替换为为匹配项指定的规则。

该示例创建一个 RegistrySecurity 对象，并添加规则，这些规则允许和拒绝具有不同继承和传播标志的当前用户的各种权限。 然后，该示例创建一个新规则，该规则仅允许当前用户读取密钥，并使用 ResetAccessRule 方法删除用户的所有规则，并将其替换为新规则。

注意

此示例不将安全对象附加到 对象 RegistryKey 。 RegistryKey.GetAccessControl请参阅 方法和 RegistryKey.SetAccessControl 方法。

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. ResetAccessRule removes
        // all the existing rules for the current user, 
        // replacing them with this rule.
        rule = new RegistryAccessRule(user, 
            RegistryRights.ReadKey, 
            AccessControlType.Allow);
        mSec.ResetAccessRule(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: 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. ResetAccessRule removes
        ' all the existing rules for the current user, 
        ' replacing them with this rule.
        rule = New RegistryAccessRule(user, _
            RegistryRights.ReadKey, _
            AccessControlType.Allow)
        mSec.ResetAccessRule(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: Allow
'      Rights: ReadKey
' Inheritance: None
' Propagation: None
'   Inherited? False

注解

如果没有其用户与指定规则匹配的访问规则， rule 则添加 。