RegistrySecurity.RemoveAccessRuleSpecific(RegistryAccessRule) メソッド

定義

名前空間:

System.Security.AccessControl

アセンブリ:

Microsoft.Win32.Registry.dll

指定した規則に正確に一致するアクセス制御規則を検索し、見つかった場合は、その規則を削除します。

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

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

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

Public Sub RemoveAccessRuleSpecific (rule As RegistryAccessRule)

パラメーター

rule

RegistryAccessRule

削除する RegistryAccessRule。

例外

ArgumentNullException

rule が nullです。

例

次のコード例は、 メソッドが規則が RemoveAccessRuleSpecific 正確に一致する場合にのみ削除することを示しています。

この例では、異なる権限を許可する 2 つのルールを作成します。 規則には互換性のある継承フラグと伝達フラグがあるため、2 番目の規則が追加されると、最初の規則とマージされます。 この例では、最初の RemoveAccessRuleSpecific ルールを指定して メソッドを呼び出しますが、ルールがマージされるため、一致するルールはありません。 次に、 メソッドを RemoveAccessRule 呼び出して、マージされたルールから 2 番目のルールを削除し、最後に メソッドを RemoveAccessRuleSpecific 呼び出して最初のルールを削除します。

Note

この例では、セキュリティ オブジェクトを オブジェクトに RegistryKey アタッチしません。 メソッドと RegistryKey.GetAccessControl メソッドを RegistryKey.SetAccessControl 参照してください。

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 rule1 = new RegistryAccessRule(user, 
            RegistryRights.ReadKey | RegistryRights.WriteKey
                | RegistryRights.Delete, 
            InheritanceFlags.ContainerInherit, 
            PropagationFlags.None, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule1);

        // Add a rule that allows the current user the right
        // right to take ownership of a key, using the same 
        // inheritance and propagation flags. This rule 
        // merges with the first rule.
        RegistryAccessRule rule2 = new RegistryAccessRule(user, 
            RegistryRights.ChangePermissions, 
            InheritanceFlags.ContainerInherit,
            PropagationFlags.None, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule2);

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

        // Attempt to use RemoveRuleSpecific to remove the
        // first rule. The removal fails, because the rule
        // in the RegistrySecurity object has been altered.
        mSec.RemoveAccessRuleSpecific(rule1);

        // Show that the rule was not removed.
        ShowSecurity(mSec);

        // Use the RemoveAccessRule method to remove rule2,
        // and then use RemoveAccessRuleSpecific to remove
        // rule1.
        mSec.RemoveAccessRule(rule2);
        mSec.RemoveAccessRuleSpecific(rule1);

        // Show that the rules have been 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: Allow
      Rights: SetValue, CreateSubKey, Delete, ReadKey, ChangePermissions
 Inheritance: ContainerInherit
 Propagation: None
   Inherited? False


Current access rules:

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


Current access rules:

*/

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 rule1 As New RegistryAccessRule(user, _
            RegistryRights.ReadKey Or RegistryRights.WriteKey _
                Or RegistryRights.Delete, _
            InheritanceFlags.ContainerInherit, _
            PropagationFlags.None, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule1)

        ' Add a rule that allows the current user the right
        ' right to take ownership of a key, using the same 
        ' inheritance and propagation flags. This rule 
        ' merges with the first rule.
        Dim rule2 As New RegistryAccessRule(user, _
            RegistryRights.ChangePermissions, _
            InheritanceFlags.ContainerInherit, _
            PropagationFlags.None, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule2)

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

        ' Attempt to use RemoveRuleSpecific to remove the
        ' first rule. The removal fails, because the rule
        ' in the RegistrySecurity object has been altered.
        mSec.RemoveAccessRuleSpecific(rule1)

        ' Show that the rule was not removed.
        ShowSecurity(mSec)

        ' Use the RemoveAccessRule method to remove rule2,
        ' and then use RemoveAccessRuleSpecific to remove
        ' rule1.
        mSec.RemoveAccessRule(rule2)
        mSec.RemoveAccessRuleSpecific(rule1)

        ' Show that the rules have been removed.
        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: Allow
'      Rights: SetValue, CreateSubKey, Delete, ReadKey, ChangePermissions
' Inheritance: ContainerInherit
' Propagation: None
'   Inherited? False
'
'
'Current access rules:
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: SetValue, CreateSubKey, Delete, ReadKey, ChangePermissions
' Inheritance: ContainerInherit
' Propagation: None
'   Inherited? False
'
'
'Current access rules:
'

注釈

ルールは、フラグを含むすべての詳細で完全に一致する rule 場合にのみ削除されます。 同じユーザー AccessControlType を持つ他のルールは影響を受けません。

重要

ルールは 1 つ以上の基になるアクセス制御エントリ (ACE) を表し、ユーザーのアクセス セキュリティ規則を変更すると、これらのエントリは必要に応じて分割または結合されます。 したがって、ルールが追加されたときに持っていた特定の形式に存在しなくなった可能性があり、その場合 RemoveAccessRuleSpecific 、メソッドはそれを削除できません。