PermissionSetAttribute クラス

定義

名前空間:

System.Security.Permissions

アセンブリ:

System.Security.Permissions.dll

パッケージ:

System.Security.Permissions v9.0.0-rc.2.24473.5

ソース:

PermissionSetAttribute.cs

注意事項

Code Access Security is not supported or honored by the runtime.

宣言セキュリティを使用して、PermissionSet のセキュリティ アクションをコードに適用できるようにします。 このクラスは継承できません。

public ref class PermissionSetAttribute sealed : System::Security::Permissions::CodeAccessSecurityAttribute

[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
[System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public sealed class PermissionSetAttribute : System.Security.Permissions.CodeAccessSecurityAttribute

[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
[<System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
type PermissionSetAttribute = class
    inherit CodeAccessSecurityAttribute

Public NotInheritable Class PermissionSetAttribute
Inherits CodeAccessSecurityAttribute

継承

Object

Attribute

SecurityAttribute

CodeAccessSecurityAttribute

PermissionSetAttribute

属性

AttributeUsageAttribute ObsoleteAttribute

例

次の例は、 クラスの使用方法を PermissionSetAttribute 示しています。

// The #define statement for BuildFile must be included the first time this sample is run.  
// This causes the sample to create a file named 'LocalIntranet.xml' in the c:\temp folder.  
// After creating the LocalInternet.xml file, comment out the #define statement and rerun 
// the sample to demonstrate the use of the permission set attribute.
#define BuildFile
using System;
using System.Security;
using System.Security.Permissions;
using System.Security.Policy;
using System.Collections;
using System.IO;

namespace PermissionSetAttributeDemo
{
    class Class1
    {		
        [STAThread]
        static void Main(string[] args)
        {
            // Run this sample with the BuildFile symbol defined to create the required file, then
            // comment out the #define statement to demonstrate the use of the attribute.
#if(BuildFile)
            using (StreamWriter sw = new StreamWriter("c:\\temp\\LocalIntranet.xml")) 
            {
                sw.WriteLine(GetNamedPermissionSet("LocalIntranet"));
                sw.Close();
            }
#endif
#if(!BuildFile)
            ReadFile1();
            ReadFile2();
            ReadFile3();
            Console.WriteLine("Press the Enter key to exit.");
            Console.Read();
#endif
        }
#if(!BuildFile)
        // Read the LocalIntranet.xml file.
        static void ReadFile1()
        {
            try
            {
                Console.WriteLine("Attempting to read a file using the FullTrust permission set.");
                using (StreamReader sr = new StreamReader("c:\\temp\\LocalIntranet.xml")) 
                {
                    string permissionSet = sr.ReadToEnd();
                    sr.Close();
                }
                Console.WriteLine("The file was successfully read.");
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }
        [PermissionSetAttribute(SecurityAction.PermitOnly, File = "c:\\temp\\LocalIntranet.xml")]
            // Read the file with the specified security action on the file path.
        static void ReadFile2()
        {
            try
            {
                Console.WriteLine("Attempting to read a file using the LocalIntranet permission set.");
                using (StreamReader sr = new StreamReader("c:\\temp\\LocalIntranet.xml")) 
                {
                    string permissionSet = sr.ReadToEnd();
                    sr.Close();
                }
                Console.WriteLine("The file was successfully read.");
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }
        [PermissionSetAttribute(SecurityAction.PermitOnly, Name = "LocalIntranet")]
            // Read the file with the specified security action on the permission set.
        static void ReadFile3()
        {
            try
            {
                Console.WriteLine("\nSecond attempt to read a file using " + 
                    "the LocalIntranet permission set.");
                using (StreamReader sr = new StreamReader("c:\\temp\\LocalIntranet.xml")) 
                {
                    string permissionSet = sr.ReadToEnd();
                    sr.Close();
                }
                Console.WriteLine("The file was successfully read.");
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }
#endif
        // Locate the named permission set at the Machine level and return it as a string value.
        private static string GetNamedPermissionSet(string name)
        {
            IEnumerator policyEnumerator = SecurityManager.PolicyHierarchy();
            // Move through the policy levels to the Machine Level.
            while(policyEnumerator.MoveNext())
            {
                PolicyLevel currentLevel = (PolicyLevel)policyEnumerator.Current;
                if(currentLevel.Label == "Machine")
                {
                    // Iterate through the permission sets at the Machine level.
                    IList namedPermissions = currentLevel.NamedPermissionSets;
                    IEnumerator namedPermission = namedPermissions.GetEnumerator();
                    // Locate the named permission set.
                    while(namedPermission.MoveNext())
                    {
                        if(((NamedPermissionSet)namedPermission.Current).Name == name)
                        {
                            return ((NamedPermissionSet)namedPermission.Current).ToString();
                        }
                    }
                }
            }
            return null;
        }
    }
}
//
// This sample produces the following output:
//
// File created at c:\temp\LocalIntranet.xml
// Uncomment the BuildFile=false line and run the sample again.
//
// This sample completed successfully; press Exit to continue.
//
//
// The second time the sample is ran (without DEBUG flag):
//
// Attempting to read a file using the FullTrust permission set.
// The file was successfully read.
// Attempting to read a file using the LocalIntranet permission set.
// Request for the permission of type
// System.Security.Permissions.FileIOPermission, mscorlib, Version=1.0.5000.0,
// Culture=neutral, PublicKeyToken=b77a5c561934e089 failed.
//
// Second attempt to read a file using the LocalIntranet permission set.
// Request for the permission of type System.Security.Permissions.FileIOPermission,
// mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
// failed.
// Press the Enter key to exit.

' The #Const BuildFile = True statement must be active the first time this
' sample is run. This causes the sample to create a file named
' 'LocalIntranet.xml' in the c:\temp folder. After creating the
' LocalInternet.xml file, comment out the #Const BUILDFILE = True statement,
' uncomment the #Const BUILDFILE = False statement, and rerun the sample to
' demonstrate the use of the permission set attribute.
Imports System.Security
Imports System.Security.Permissions
Imports System.Security.Policy
Imports System.Collections
Imports System.IO

#Const BUILDFILE = True
'#Const BUILDFILE = False

Public Class Form1
    Inherits System.Windows.Forms.Form

    ' Event handler for Run button.
    <STAThread()> _
        Private Sub Button1_Click( _
            ByVal sender As System.Object, _
            ByVal e As System.EventArgs) Handles Button1.Click

        tbxOutput.Cursor = Cursors.WaitCursor
        tbxOutput.Text = ""

        Dim xmlFilePath As String
        xmlFilePath = "c:\temp\LocalIntranet.xml"

        ' Run this sample with the BuildFile symbol defined to create the
        ' required file, then comment out the /define statement to demonstrate
        ' the use of the attribute.
#If (BUILDFILE) Then
        Dim sw As New StreamWriter(xmlFilePath)
        Try
            sw.WriteLine(GetNamedPermissionSet("LocalIntranet"))
            WriteLine("File created at " + xmlFilePath)
            WriteLine("Uncomment the BuildFile=false line and " + _
                "run the sample again.")
        Finally
            sw.Close()
        End Try
#End If

#If (Not BUILDFILE) Then
        ReadFile1()
        ReadFile2()
        ReadFile3()
#End If
        ' Align interface and conclude application.
        WriteLine(vbCrLf + "This sample completed successfully;" + _
            " press Exit to continue.")

        ' Reset the cursor.
        tbxOutput.Cursor = Cursors.Default
    End Sub

#If (Not BUILDFILE) Then
    ' Read the LocalIntranet.xml file.
    Private Sub ReadFile1()
        Try
            WriteLine("Attempting to read a file using the FullTrust " + _
                "permission set.")
            Dim sr As New StreamReader("c:\temp\LocalIntranet.xml")
            Try
                Dim permissionSet As String = sr.ReadToEnd()
            Finally
                sr.Close()
            End Try
            WriteLine("The file was successfully read.")
        Catch e As Exception
            WriteLine(e.Message)
        End Try
    End Sub

    <System.Security.Permissions.PermissionSetAttribute( _
        SecurityAction.PermitOnly, _
        File:="c:\temp\LocalIntranet.xml")> _
    Private Sub ReadFile2()
        ' Read the file with the specified security action on the file path.
        Try
            WriteLine("Attempting to read a file using the LocalIntranet " + _
                "permission set.")
            Dim sr As New StreamReader("c:\temp\LocalIntranet.xml")
            Try
                Dim permissionSet As String = sr.ReadToEnd()
            Finally
                sr.Close()
            End Try
            WriteLine("The file was successfully read.")
        Catch e As Exception
            WriteLine(e.Message)
        End Try
    End Sub

    <System.Security.Permissions.PermissionSetAttribute( _
        SecurityAction.PermitOnly, _
        Name:="LocalIntranet")> _
    Private Sub ReadFile3()
        ' Read the file with the specified security action on the
        ' permission set.
        Try
            WriteLine("Second attempt to read a file using the " + _
                "LocalIntranet permission set.")
            Dim sr As New StreamReader("c:\temp\LocalIntranet.xml")
            Try
                Dim permissionSet As String = sr.ReadToEnd()
            Finally
                sr.Close()
            End Try
            WriteLine("The file was successfully read.")
        Catch e As Exception
            WriteLine(e.Message)
        End Try
    End Sub
#End If

    ' Locate the named permission set at the Machine level and return it as
    ' a string value.
    Private Shared Function GetNamedPermissionSet( _
        ByVal name As String) As String

        Dim policyEnumerator As IEnumerator
        policyEnumerator = SecurityManager.PolicyHierarchy()

        ' Move through the policy levels to the Machine Level.
        While policyEnumerator.MoveNext()
            Dim currentLevel As PolicyLevel
            currentLevel = CType(policyEnumerator.Current, PolicyLevel)
            If currentLevel.Label = "Machine" Then
                ' Iterate through the permission sets at the Machine level.
                Dim namedPermissions As IList
                namedPermissions = currentLevel.NamedPermissionSets

                Dim namedPermission As IEnumerator
                namedPermission = namedPermissions.GetEnumerator()

                Dim currentPermission As NamedPermissionSet
                ' Locate the named permission set.
                While namedPermission.MoveNext()
                    currentPermission = CType( _
                        namedPermission.Current, _
                        NamedPermissionSet)

                    If currentPermission.Name.Equals(name) Then
                        Return currentPermission.ToString()
                    End If
                End While
            End If
        End While
        Return Nothing
    End Function

    ' Write specified message and carriage return to the output textbox.
    Private Sub WriteLine(ByVal message As String)
        tbxOutput.AppendText(message + vbCrLf)

    End Sub

    ' Event handler for Exit button.
    Private Sub Button2_Click( _
        ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles Button2.Click

        Application.Exit()
    End Sub
#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents Panel2 As System.Windows.Forms.Panel
    Friend WithEvents Panel1 As System.Windows.Forms.Panel
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents tbxOutput As System.Windows.Forms.RichTextBox
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.Panel2 = New System.Windows.Forms.Panel
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Panel1 = New System.Windows.Forms.Panel
        Me.tbxOutput = New System.Windows.Forms.RichTextBox
        Me.Panel2.SuspendLayout()
        Me.Panel1.SuspendLayout()
        Me.SuspendLayout()
        '
        'Panel2
        '
        Me.Panel2.Controls.Add(Me.Button1)
        Me.Panel2.Controls.Add(Me.Button2)
        Me.Panel2.Dock = System.Windows.Forms.DockStyle.Bottom
        Me.Panel2.DockPadding.All = 20
        Me.Panel2.Location = New System.Drawing.Point(0, 320)
        Me.Panel2.Name = "Panel2"
        Me.Panel2.Size = New System.Drawing.Size(616, 64)
        Me.Panel2.TabIndex = 1
        '
        'Button1
        '
        Me.Button1.Dock = System.Windows.Forms.DockStyle.Right
        Me.Button1.Font = New System.Drawing.Font( _
            "Microsoft Sans Serif", _
            9.0!, _
            System.Drawing.FontStyle.Regular, _
            System.Drawing.GraphicsUnit.Point, _
            CType(0, Byte))
        Me.Button1.Location = New System.Drawing.Point(446, 20)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(75, 24)
        Me.Button1.TabIndex = 2
        Me.Button1.Text = "&Run"
        '
        'Button2
        '
        Me.Button2.Dock = System.Windows.Forms.DockStyle.Right
        Me.Button2.Font = New System.Drawing.Font( _
            "Microsoft Sans Serif", _
            9.0!, _
            System.Drawing.FontStyle.Regular, _
            System.Drawing.GraphicsUnit.Point, _
            CType(0, Byte))
        Me.Button2.Location = New System.Drawing.Point(521, 20)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(75, 24)
        Me.Button2.TabIndex = 3
        Me.Button2.Text = "E&xit"
        '
        'Panel1
        '
        Me.Panel1.Controls.Add(Me.tbxOutput)
        Me.Panel1.Dock = System.Windows.Forms.DockStyle.Fill
        Me.Panel1.DockPadding.All = 20
        Me.Panel1.Location = New System.Drawing.Point(0, 0)
        Me.Panel1.Name = "Panel1"
        Me.Panel1.Size = New System.Drawing.Size(616, 320)
        Me.Panel1.TabIndex = 2
        '
        'tbxOutput
        '
        Me.tbxOutput.AccessibleDescription = _
            "Displays output from application."
        Me.tbxOutput.AccessibleName = "Output textbox."
        Me.tbxOutput.Dock = System.Windows.Forms.DockStyle.Fill
        Me.tbxOutput.Location = New System.Drawing.Point(20, 20)
        Me.tbxOutput.Name = "tbxOutput"
        Me.tbxOutput.Size = New System.Drawing.Size(576, 280)
        Me.tbxOutput.TabIndex = 1
        Me.tbxOutput.Text = "Click the Run button to run the application."
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15)
        Me.ClientSize = New System.Drawing.Size(616, 384)
        Me.Controls.Add(Me.Panel1)
        Me.Controls.Add(Me.Panel2)
        Me.Name = "Form1"
        Me.Text = "PermisstionSetAttribute"
        Me.Panel2.ResumeLayout(False)
        Me.Panel1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region
End Class
'
' This sample produces the following output:
'
' File created at c:\temp\LocalIntranet.xml
' Uncomment the BuildFile=false line and run the sample again.
'
' This sample completed successfully; press Exit to continue.
'
'
' The second time the sample is ran (without DEBUG flag):
'
' Attempting to read a file using the FullTrust permission set.
' The file was successfully read.
' Attempting to read a file using the LocalIntranet permission set.
' Request for the permission of type
' System.Security.Permissions.FileIOPermission, mscorlib, Version=1.0.5000.0,
' Culture=neutral, PublicKeyToken=b77a5c561934e089 failed.
'
' Second attempt to read a file using the LocalIntranet permission set.
' Request for the permission of type System.Security.Permissions.FileIOPermission,
' mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
' failed.
' This sample completed successfully; press Exit to continue.

注釈

注意事項

コード アクセス セキュリティ (CAS) は、.NET Framework と .NET のすべてのバージョンで非推奨になりました。 最近のバージョンの .NET では、CAS 関連の API が使われている場合、CAS の注釈は使われず、エラーが発生します。 開発者は、代わりの手段を見つけてセキュリティ タスクを実現する必要があります。

プロパティ Name、File、および XML はPermissionSetAttribute相互に排他的です。つまり、権限セットは、名前付きアクセス許可セット、アクセス許可セットの XML 表現を含むファイル、またはアクセス許可セットの XML 表現を含む文字列のいずれかをソースとしてのみ持つことができます。

許可される宣言のスコープは、使用される によって SecurityAction 異なります。 SecurityActionに対してPermissionSet実行される は、セット内の各アクセス許可に対してそのアクションを実行することと同じです。

セキュリティ属性によって宣言されたセキュリティ情報は、属性ターゲットのメタデータに格納され、実行時にシステムによってアクセスされます。 セキュリティ属性は、宣言型セキュリティにのみ使用されます。 命令型セキュリティの場合は、対応するアクセス許可クラスを使用します。

コンストラクター

PermissionSetAttribute(SecurityAction)

古い. 指定したセキュリティ アクションを使用して PermissionSetAttribute クラスの新しいインスタンスを初期化します。

プロパティ

Action	古い. セキュリティ アクションを取得または設定します。 (継承元 SecurityAttribute)
File	古い. 宣言するカスタム アクセス許可の XML 表現を格納したファイルを取得または設定します。
Hex	古い. XML エンコード済みのアクセス許可セットの 16 進数表現を取得または設定します。
Name	古い. アクセス許可セットの名前を取得または設定します。
TypeId	古い. 派生クラスで実装されると、この Attribute の一意の識別子を取得します。 (継承元 Attribute)
UnicodeEncoded	古い. File で指定したファイルが Unicode または ASCII のどちらでエンコードされるかを示す値を取得または設定します。
Unrestricted	古い. 属性によって保護されているリソースに対して完全な (無制限の) アクセス許可が宣言されているかどうかを示す値を取得または設定します。 (継承元 SecurityAttribute)
XML	古い. アクセス許可セットの XML 表現を取得または設定します。

メソッド

CreatePermission()	古い. このメソッドは使用されません。
CreatePermissionSet()	古い. このアクセス許可セットの属性オブジェクトに基づいて新しいアクセス許可セットを作成して返します。
Equals(Object)	古い. このインスタンスが、指定されたオブジェクトと等価であるかどうかを示す値を返します。 (継承元 Attribute)
GetHashCode()	古い. このインスタンスのハッシュ コードを返します。 (継承元 Attribute)
GetType()	古い. 現在のインスタンスの Type を取得します。 (継承元 Object)
IsDefaultAttribute()	古い. 派生クラスでオーバーライドされるとき、このインスタンスの値が派生クラスの既定値であるかどうかを示します。 (継承元 Attribute)
Match(Object)	古い. 派生クラス内でオーバーライドされたときに、指定したオブジェクトとこのインスタンスが等しいかどうかを示す値を返します。 (継承元 Attribute)
MemberwiseClone()	古い. 現在の Object の簡易コピーを作成します。 (継承元 Object)
ToString()	古い. 現在のオブジェクトを表す文字列を返します。 (継承元 Object)

こちらもご覧ください

• PermissionSet
• NamedPermissionSet
• 属性を使用したメタデータの拡張