RegistryKey.SetAccessControl メソッドとは? わかりやすく解説

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RegistryKey.SetAccessControl メソッド

メモ : このメソッドは、.NET Framework version 2.0新しく追加されたものです。

既存レジストリ キーWindows アクセス制御セキュリティ適用します。

名前空間: Microsoft.Win32
アセンブリ: mscorlib (mscorlib.dll 内)
構文構文

Public Sub SetAccessControl ( _
    registrySecurity As RegistrySecurity _
)
Dim instance As RegistryKey
Dim registrySecurity As RegistrySecurity

instance.SetAccessControl(registrySecurity)
public void SetAccessControl (
    RegistrySecurity registrySecurity
)
public:
void SetAccessControl (
    RegistrySecurity^ registrySecurity
)
public void SetAccessControl (
    RegistrySecurity registrySecurity
)
public function SetAccessControl (
    registrySecurity : RegistrySecurity
)

パラメータ

registrySecurity

現在のサブキーに適用するアクセス制御セキュリティを表す RegistrySecurity オブジェクト

例外例外
例外種類条件

UnauthorizedAccessException

現在の RegistryKey オブジェクトアクセス制御セキュリティ指定したキー表しますが、呼び出し元には RegistryRights.ChangePermissions 権限がありません。

ArgumentNullException

registrySecuritynull 参照 (Visual Basic では Nothing) です。

ObjectDisposedException

操作対象RegistryKey閉じてます。閉じられキーにはアクセスできません。

解説解説
使用例使用例

テスト キー作成するコード例次に示します現在のユーザーは ReadKey 権限Delete 権限許可されていますが、ChangePermissions 権限と WriteKey 権限拒否されています。これらのアクセス許可基づいてキー操作するための後続試み成功または失敗します

キー削除する前にコード一時停止ます。レジストリ エディタ切り替えることにより、キーへのアクセスレジストリ エディタ使用した場合でも同じアクセス権適用されることを確認できます。このことは、コマンド ラインから RunAs使用してレジストリ エディタ実行し管理者権限持たないローカル ユーザーとしてサンプル コード実行するとよくわかります特定の管理者アクセス許可変更拒否され場合でも、レジストリ エディタでは常にこれが許可されます。TestUser という名前のローカル ユーザー定義した場合コマンド runas /user:TestUser cmd によってコマンド ウィンドウ開かれ、ここでレジストリ エディタ実行しサンプル コード実行できます

Imports System
Imports System.Reflection
Imports System.Security
Imports System.Security.AccessControl
Imports Microsoft.Win32

Public Class Example
    Public Shared Sub Main()
        ' Delete the example key if it exists.
        Try
            Registry.CurrentUser.DeleteSubKey("RegistryRightsExample")
            Console.WriteLine("Example key has been deleted.")
        Catch ex As ArgumentException
            ' ArgumentException is thrown if the key does not exist.
 In
            ' this case, there is no reason to display a message.
        Catch ex As Exception
            Console.WriteLine("Unable to delete the example key:
 {0}", ex)
            Return
        End Try

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

        Dim rs As New RegistrySecurity()

        ' Allow the current user to read and delete the key.
        '
        rs.AddAccessRule(new RegistryAccessRule(user, _
            RegistryRights.ReadKey Or RegistryRights.Delete, _
            InheritanceFlags.None, _
            PropagationFlags.None, _
            AccessControlType.Allow))

        ' Prevent the current user from writing or changing the
        ' permission set of the key. Note that if Delete permission
        ' were not allowed in the previous access rule, denying
        ' WriteKey permission would prevent the user from deleting the
 
        ' key.
        rs.AddAccessRule(new RegistryAccessRule(user, _
            RegistryRights.WriteKey Or RegistryRights.ChangePermissions,
 _
            InheritanceFlags.None, _
            PropagationFlags.None, _
            AccessControlType.Deny))

        ' Create the example key with registry security.
        Dim rk As RegistryKey = Nothing
        Try
            rk = Registry.CurrentUser.CreateSubKey("RegistryRightsExample",
 _
                RegistryKeyPermissionCheck.Default, rs)
            Console.WriteLine(vbCrLf & "Example key created.")
            rk.SetValue("ValueName", "StringValue")
        Catch ex As Exception
            Console.WriteLine(vbCrLf & "Unable to create the
 example key: {0}", ex)
        End Try

        If rk IsNot Nothing Then
 rk.Close()

        rk = Registry.CurrentUser

        Dim rk2 As RegistryKey
        
        ' Open the key with read access.
        rk2 = rk.OpenSubKey("RegistryRightsExample",
 False)
        Console.WriteLine(vbCrLf & "Retrieved value: {0}",
 rk2.GetValue("ValueName"))
        rk2.Close()

        ' Attempt to open the key with write access.
        Try
            rk2 = rk.OpenSubKey("RegistryRightsExample",
 True)
        Catch ex As SecurityException
            Console.WriteLine(vbCrLf & "Unable to write to
 the example key." _
                & " Caught SecurityException: {0}",
 ex.Message)
        End Try
        If rk2 IsNot Nothing Then
 rk2.Close()

        ' Attempt to change permissions for the key.
        Try
            rs = New RegistrySecurity()
            rs.AddAccessRule(new RegistryAccessRule(user, _
                RegistryRights.WriteKey, _
                InheritanceFlags.None, _
                PropagationFlags.None, _
                AccessControlType.Allow))
            rk2 = rk.OpenSubKey("RegistryRightsExample",
 False)
            rk2.SetAccessControl(rs)
            Console.WriteLine(vbCrLf & "Example key permissions
 were changed.")
        Catch ex As UnauthorizedAccessException
            Console.WriteLine(vbCrLf & "Unable to change permissions
 for the example key." _
                & " Caught UnauthorizedAccessException: {0}",
 ex.Message)
        End Try
        If rk2 IsNot Nothing Then
 rk2.Close()

        Console.WriteLine(vbCrLf & "Press Enter to delete
 the example key.")
        Console.ReadLine()

        Try
            rk.DeleteSubKey("RegistryRightsExample")
            Console.WriteLine("Example key was deleted.")
        Catch ex As Exception
            Console.WriteLine("Unable to delete the example key:
 {0}", ex)
        End Try

        rk.Close()
    End Sub
End Class

' This code produces the following output:
'
'Example key created.
'
'Retrieved value: StringValue
'
'Unable to write to the example key. Caught SecurityException: Requested
 registry access is not allowed.
'
'Unable to change permissions for the example key. Caught UnauthorizedAccessException:
 Cannot write to the registry key.
'
'Press Enter to delete the example key.
'
'Example key was deleted.
using System;
using System.Reflection;
using System.Security;
using System.Security.AccessControl;
using Microsoft.Win32;

public class Example
{
    public static void Main()
    {
        // Delete the example key if it exists.
        try
        {
            Registry.CurrentUser.DeleteSubKey("RegistryRightsExample");
            Console.WriteLine("Example key has been deleted.");
        }
        catch (ArgumentException)
        {
            // ArgumentException is thrown if the key does not exist.
 In
            // this case, there is no reason to display a message.
        }
        catch (Exception ex)
        {
            Console.WriteLine("Unable to delete the example key: {0}",
 ex);
            return;
        }

        string user = Environment.UserDomainName + "\\"
 + Environment.UserName;

        RegistrySecurity rs = new RegistrySecurity();

        // Allow the current user to read and delete the key.
        //
        rs.AddAccessRule(new RegistryAccessRule(user, 
            RegistryRights.ReadKey | RegistryRights.Delete, 
            InheritanceFlags.None, 
            PropagationFlags.None, 
            AccessControlType.Allow));

        // Prevent the current user from writing or changing the
        // permission set of the key. Note that if Delete permission
        // were not allowed in the previous access rule, denying
        // WriteKey permission would prevent the user from deleting
 the 
        // key.
        rs.AddAccessRule(new RegistryAccessRule(user, 
            RegistryRights.WriteKey | RegistryRights.ChangePermissions, 
            InheritanceFlags.None, 
            PropagationFlags.None, 
            AccessControlType.Deny));

        // Create the example key with registry security.
        RegistryKey rk = null;
        try
        {
            rk = Registry.CurrentUser.CreateSubKey("RegistryRightsExample",
 
                RegistryKeyPermissionCheck.Default, rs);
            Console.WriteLine("\r\nExample key created.");
            rk.SetValue("ValueName", "StringValue");
        }
        catch (Exception ex)
        {
            Console.WriteLine("\r\nUnable to create the example key: {0}",
 ex);
        }
        if (rk != null) rk.Close();

        rk = Registry.CurrentUser;

        RegistryKey rk2;
        
        // Open the key with read access.
        rk2 = rk.OpenSubKey("RegistryRightsExample", false);
        Console.WriteLine("\r\nRetrieved value: {0}", rk2.GetValue("ValueName"));
        rk2.Close();

        // Attempt to open the key with write access.
        try
        {
            rk2 = rk.OpenSubKey("RegistryRightsExample", true);
        }
        catch (SecurityException ex)
        {
            Console.WriteLine("\nUnable to write to the example key." +
                " Caught SecurityException: {0}", ex.Message);
        }
        if (rk2 != null) rk2.Close();

        // Attempt to change permissions for the key.
        try
        {
            rs = new RegistrySecurity();
            rs.AddAccessRule(new RegistryAccessRule(user, 
                RegistryRights.WriteKey, 
                InheritanceFlags.None, 
                PropagationFlags.None, 
                AccessControlType.Allow));
            rk2 = rk.OpenSubKey("RegistryRightsExample", false);
            rk2.SetAccessControl(rs);
            Console.WriteLine("\r\nExample key permissions were changed.");
        }
        catch (UnauthorizedAccessException ex)
        {
            Console.WriteLine("\nUnable to change permissions for
 the example key." +
                " Caught UnauthorizedAccessException: {0}", ex.Message);
        }
        if (rk2 != null) rk2.Close();

        Console.WriteLine("\r\nPress Enter to delete the example key.");
        Console.ReadLine();

        try
        {
            rk.DeleteSubKey("RegistryRightsExample");
            Console.WriteLine("Example key was deleted.");
        }
        catch(Exception ex)
        {
            Console.WriteLine("Unable to delete the example key: {0}",
 ex);
        }

        rk.Close();
    }
}

/* This code example produces the following output:

Example key created.

Retrieved value: StringValue

Unable to write to the example key. Caught SecurityException: Requested registry
 access is not allowed.

Unable to change permissions for the example key. Caught UnauthorizedAccessException:
 Cannot write to the registry key.

Press Enter to delete the example key.

Example key was deleted.
 */
using namespace System;
using namespace System::Reflection;
using namespace Microsoft::Win32;
using namespace System::Security::AccessControl;
using namespace System::Security;

int main()
{
    // Delete the example key if it exists.
    try
    {
        Registry::CurrentUser->DeleteSubKey("RegistryRightsExample");
        Console::WriteLine("Example key has been deleted.");
    }
    catch (ArgumentException^)
    {
        // ArgumentException is thrown if the key does not exist. In
        // this case, there is no reason to display a message.
    }
    catch (InvalidOperationException^ ex)
    {
        Console::WriteLine(
            "{0}Unable to delete key: it appears to have child subkeys:{0}{1}",
 
            Environment::NewLine, ex);
        return 0;
    }
    catch (SecurityException^ ex)
    {
        Console::WriteLine("{0}You do not have the permissions required "
 +
            "to delete this key:{0}{1}", Environment::NewLine,
 ex);
        return 0;
    }

    String^ user = Environment::UserDomainName + "\\" + Environment::UserName;

    RegistrySecurity^ regSecurity = gcnew RegistrySecurity();

    // Allow the current user to read and delete the key.
    //
    regSecurity->AddAccessRule(gcnew RegistryAccessRule(user,
        RegistryRights::ReadKey | RegistryRights::Delete,
        InheritanceFlags::None,
        PropagationFlags::None,
        AccessControlType::Allow));

    // Prevent the current user from writing or changing the
    // permission set of the key. Note that if Delete permission
    // were not allowed in the previous access rule, denying
    // WriteKey permission would prevent the user from deleting the
    // key.
    regSecurity->AddAccessRule(gcnew RegistryAccessRule(user,
        RegistryRights::WriteKey | RegistryRights::ChangePermissions,
        InheritanceFlags::None,
        PropagationFlags::None,
        AccessControlType::Deny));

    // Create the example key with registry security.
    RegistryKey^ createdKey = nullptr;
    try
    {
        createdKey = Registry::CurrentUser->CreateSubKey(
            "RegistryRightsExample", RegistryKeyPermissionCheck::Default
,
            regSecurity);
        Console::WriteLine("{0}Example key created.", Environment::NewLine);
        createdKey->SetValue("ValueName", "StringValue");
    }
    catch (SecurityException^ ex)
    {
        Console::WriteLine("{0}You do not have the permissions required "
 +
            "to create the example key:{0}{1}", Environment::NewLine, ex);
        return 0;
    }
    if (createdKey != nullptr)
    {
        createdKey->Close();
    }

    RegistryKey^ openedKey;

    // Open the key with read access.
    openedKey = Registry::CurrentUser->OpenSubKey("RegistryRightsExample"
,
        false);
    Console::WriteLine("{0}Retrieved value: {1}",
        Environment::NewLine, openedKey->GetValue("ValueName"));
    openedKey->Close();

    // Attempt to open the key with write access.
    try
    {
        openedKey = Registry::CurrentUser->OpenSubKey("RegistryRightsExample"
,
            true);
    }
    catch (SecurityException^ ex)
    {
        Console::WriteLine("{0}You do not have the permissions required "
 +
            "to write to the example key:{0}{1}", Environment::NewLine,
 ex);
    }
    if (openedKey != nullptr)
    {
        openedKey->Close();
    }

    // Attempt to change permissions for the key.
    try
    {
        regSecurity = gcnew RegistrySecurity();
        regSecurity->AddAccessRule(gcnew RegistryAccessRule(user,
            RegistryRights::WriteKey,
            InheritanceFlags::None,
            PropagationFlags::None,
            AccessControlType::Allow));
        openedKey = Registry::CurrentUser->OpenSubKey("RegistryRightsExample"
,
            false);
        openedKey->SetAccessControl(regSecurity);
        Console::WriteLine("{0}Example key permissions were changed.",
 
            Environment::NewLine);
    }
    catch (UnauthorizedAccessException^ ex)
    {
        Console::WriteLine("{0}You are not authorized to change " +
            "permissions for the example key:{0}{1}",
 Environment::NewLine, ex);
    }
    if (openedKey != nullptr)
    {
        openedKey->Close();
    }

    Console::WriteLine("{0}Press Enter to delete the example key.", 
        Environment::NewLine);
    Console::ReadLine();

    try
    {
        Registry::CurrentUser->DeleteSubKey("RegistryRightsExample");
        Console::WriteLine("Example key was deleted.");
    }
    catch(SecurityException^ ex)
    {
        Console::WriteLine("{0}You do not have the permissions required to "
            + "delete the example key:{0}{1}", Environment::NewLine, ex);
    }
}
import System.*;
import System.Reflection.*;
import System.Security.*;
import System.Security.AccessControl.*;
import Microsoft.Win32.*;

public class Example
{
    public static void main(String[]
 args)
    {
        // Delete the example key if it exists.
        try {
            Registry.CurrentUser.DeleteSubKey("RegistryRightsExample");
            Console.WriteLine("Example key has been deleted.");
        }
        catch (ArgumentException exp) {
            // ArgumentException is thrown if the key does not exist.
 In
            // this case, there is no reason to display a message.
        }
        catch (System.Exception ex) {
            Console.WriteLine("Unable to delete the example key: {0}",
 ex);
            return;
        }

        String user = Environment.get_UserDomainName() + "\\" 
            + Environment.get_UserName();

        RegistrySecurity rs = new RegistrySecurity();
        // Allow the current user to read and delete the key.
        //
        rs.AddAccessRule(new RegistryAccessRule(user, RegistryRights.ReadKey
 
            | RegistryRights.Delete, InheritanceFlags.None, 
            PropagationFlags.None, AccessControlType.Allow));
        // Prevent the current user from writing or changing the
        // permission set of the key. Note that if Delete permission
        // were not allowed in the previous access rule, denying
        // WriteKey permission would prevent the user from deleting
 the 
        // key.
        rs.AddAccessRule(new RegistryAccessRule(user, RegistryRights.WriteKey
 
            | RegistryRights.ChangePermissions, InheritanceFlags.None, 
            PropagationFlags.None, AccessControlType.Deny));
        // Create the example key with registry security.
        RegistryKey rk = null;
        try {
            rk = Registry.CurrentUser.CreateSubKey("RegistryRightsExample",
 
                RegistryKeyPermissionCheck.Default, rs);
            Console.WriteLine("\r\nExample key created.");
            rk.SetValue("ValueName", "StringValue");
        }
        catch (System.Exception ex) {
            Console.WriteLine("\r\nUnable to create the example key: {0}",
 ex);
        }
        if (rk != null) {
            rk.Close();
        }
        rk = Registry.CurrentUser;
        RegistryKey rk2;
        // Open the key with read access.
        rk2 = rk.OpenSubKey("RegistryRightsExample", false);
        Console.WriteLine("\r\nRetrieved value: {0}", rk2.GetValue("ValueName"));
        rk2.Close();
        // Attempt to open the key with write access.
        try {
            rk2 = rk.OpenSubKey("RegistryRightsExample", true);
        }
        catch (System.Security.SecurityException ex) {
            Console.WriteLine("\r\nUnable to write to the example key."
 +
                " Caught SecurityException: {0}", ex.get_Message());
        }
        if (rk2 != null) {
            rk2.Close();
        }
        // Attempt to change permissions for the key.
        try {
            rs = new RegistrySecurity();
            rs.AddAccessRule(new RegistryAccessRule(user, 
                RegistryRights.WriteKey, InheritanceFlags.None, 
                PropagationFlags.None, AccessControlType.Allow));
            rk2 = rk.OpenSubKey("RegistryRightsExample", false);
            rk2.SetAccessControl(rs);
            Console.WriteLine("\r\nExample key permissions were changed.");
        }
        catch (System.UnauthorizedAccessException ex) {
            Console.WriteLine("\r\nUnable to change permissions for
 the example key." +
                " Caught UnauthorizedAccessException: {0}", ex.get_Message());
        }
        if (rk2 != null) {
            rk2.Close();
        }
        Console.WriteLine("\r\nPress Enter to delete the example key.");
        Console.ReadLine();
        try {
            rk.DeleteSubKey("RegistryRightsExample");
            Console.WriteLine("Example key was deleted.");
        }
        catch (System.Exception ex) {
            Console.WriteLine("Unable to delete the example key: {0}",
 ex);
        }
        rk.Close();
    } //main
} //Example

/* This code example produces the following output:

Example key created.

Retrieved value: StringValue

Unable to write to the example key. Caught SecurityException: Requested registry
 access is not allowed.

Unable to change permissions for the example key. Caught UnauthorizedAccessException:
 Cannot write to the registry key.

Press Enter to delete the example key.

Example key was deleted.
 */
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バージョン情報バージョン情報
参照参照
関連項目
RegistryKey クラス
RegistryKey メンバ
Microsoft.Win32 名前空間



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