RegistrySecurity.AddAccessRule(RegistryAccessRule) 方法

定义

命名空间:

System.Security.AccessControl

程序集:

Microsoft.Win32.Registry.dll

程序集:

Microsoft.Win32.Registry.AccessControl.dll

程序集:

mscorlib.dll

搜索匹配的访问控制，新规则将与之进行合并。 如果未找到符合条件的规则，则添加新规则。

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

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

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

Public Sub AddAccessRule (rule As RegistryAccessRule)

参数

rule

RegistryAccessRule

要添加的访问控制规则。

例外

ArgumentNullException

rule 为 null。

示例

下面的代码示例创建注册表访问规则并将其添加到对象 RegistrySecurity ，其中显示了允许和拒绝权限的规则如何保持独立，同时合并相同类型的兼容规则。

备注

此示例不将安全对象附加到对象 RegistryKey 。 可以在其中找到 RegistryKey.GetAccessControl 附加安全对象的示例 RegistryKey.SetAccessControl。

演示继承和传播标志的代码示例可在类中找到 RegistryAccessRule 。

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

public class Example
{
    public static void Main()
    {
        // Create a string representing the current user.
        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 the key.
        RegistryAccessRule rule = new RegistryAccessRule(user, 
            RegistryRights.ReadKey, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule);

        // Add a rule that denies the current user the 
        // right to change permissions on the Registry.
        rule = new RegistryAccessRule(user, 
            RegistryRights.ChangePermissions, 
            AccessControlType.Deny);
        mSec.AddAccessRule(rule);

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

        // Add a rule that allows the current user the 
        // right to read permissions on the Registry. This 
        // rule is merged with the existing Allow rule.
        rule = new RegistryAccessRule(user, 
            RegistryRights.WriteKey, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule);

        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();
        }
    }
}

/* This code example produces output similar to following:

Current access rules:

        User: TestDomain\TestUser
        Type: Deny
      Rights: ChangePermissions

        User: TestDomain\TestUser
        Type: Allow
      Rights: ReadKey


Current access rules:

        User: TestDomain\TestUser
        Type: Deny
      Rights: ChangePermissions

        User: TestDomain\TestUser
        Type: Allow
      Rights: SetValue, CreateSubKey, ReadKey
 */

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

Public Class Example

    Public Shared Sub Main()

        ' Create a string representing the current user.
        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 the key.
        Dim rule As New RegistryAccessRule(user, _
            RegistryRights.ReadKey, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule)

        ' Add a rule that denies the current user the 
        ' right to change permissions on the Registry.
        rule = New RegistryAccessRule(user, _
            RegistryRights.ChangePermissions, _
            AccessControlType.Deny)
        mSec.AddAccessRule(rule)

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

        ' Add a rule that allows the current user the 
        ' right to read permissions on the Registry. This 
        ' rule is merged with the existing Allow rule.
        rule = New RegistryAccessRule(user, _
            RegistryRights.WriteKey, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule)

        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()
        Next

    End Sub
End Class 

'This code example produces output similar to following:
'
'Current access rules:
'
'        User: TestDomain\TestUser
'        Type: Deny
'      Rights: ChangePermissions
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: ReadKey
'
'
'Current access rules:
'
'        User: TestDomain\TestUser
'        Type: Deny
'      Rights: ChangePermissions
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: SetValue, CreateSubKey, ReadKey

注解

该方法AddAccessRule搜索与同一用户或组AccessControlTyperule相同的规则。 如果找不到任何内容， rule 则会添加。 如果找到匹配规则，则权限 rule 将与现有规则合并。

如果规则具有不同的继承标志，则无法合并规则。 例如，如果用户允许读取访问且没有继承标志，并且 AddAccessRule 用于添加规则，为子项 InheritanceFlags.ContainerInherit () 提供继承的用户写入访问权限，则无法合并这两个规则。

具有不同 AccessControlType 值的规则永远不会合并。

规则以最经济的方式表达权利。 例如，如果用户具有权限和权限，并且添加允许EnumerateSubKeys权限的规则，则用户具有权限的所有构成部分ReadKey。ReadPermissions Notify QueryValues 如果查询用户的权限，将看到包含 ReadKey 权限的规则。 同样，如果删除 EnumerateSubKeys 权限，其他权利成分 ReadKey 将再次出现。