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AllowPartiallyTrustedCallersAttribute 클래스

부분 신뢰 코드에서 강력한 이름의 어셈블리를 호출할 수 있게 됩니다. 이 선언이 없으면 완전 신뢰 호출자에서만 해당 어셈블리를 사용할 수 있습니다. 이 클래스는 상속될 수 없습니다.

네임스페이스: System.Security
어셈블리: mscorlib(mscorlib.dll)

구문

‘선언
<ComVisibleAttribute(True)> _
<AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple:=False, Inherited:=False)> _
Public NotInheritable Class AllowPartiallyTrustedCallersAttribute
    Inherits Attribute
‘사용 방법
Dim instance As AllowPartiallyTrustedCallersAttribute
[ComVisibleAttribute(true)] 
[AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple=false, Inherited=false)] 
public sealed class AllowPartiallyTrustedCallersAttribute : Attribute
[ComVisibleAttribute(true)] 
[AttributeUsageAttribute(AttributeTargets::Assembly, AllowMultiple=false, Inherited=false)] 
public ref class AllowPartiallyTrustedCallersAttribute sealed : public Attribute
/** @attribute ComVisibleAttribute(true) */ 
/** @attribute AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple=false, Inherited=false) */ 
public final class AllowPartiallyTrustedCallersAttribute extends Attribute
ComVisibleAttribute(true) 
AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple=false, Inherited=false) 
public final class AllowPartiallyTrustedCallersAttribute extends Attribute

설명

AllowPartiallyTrustedCallersAttribute는 어셈블리 수준에서 강력한 이름의 어셈블리에 의해 적용될 때만 효과가 있습니다. 어셈블리 수준에서 특성을 적용하는 방법에 대한 자세한 내용은 특성 적용을 참조하십시오.

기본적으로, 이 특성을 부분 신뢰 코드에서 사용할 수 있도록 어셈블리 수준에서 명시적으로 적용하지 않은 강력한 이름의 어셈블리는 보안 정책에 따라 완전 신뢰를 부여받은 다른 어셈블리에서만 호출할 수 있습니다. 어셈블리에서 공개적으로 액세스할 수 있는 모든 클래스에 있는 모든 공용 메서드 또는 보호된 메서드에 FullTrust에 대한 LinkDemand를 설정하면 이러한 제한이 강제로 적용됩니다. 부분 신뢰 코드에 의해 호출될 어셈블리가 있는 경우, AllowPartiallyTrustedCallersAttribute를 사용하여 선언할 수 있습니다. 이 특성은 어셈블리 수준에서 선언됩니다. C#에서 선언하는 예제는 [assembly:AllowPartiallyTrustedCallers]을 참조하고 Visual Basic에서 선언하는 예제는 <assembly:AllowPartiallyTrustedCallers>을 참조하십시오.

경고

이 어셈블리 수준의 특성이 존재하면 FullTrust  LinkDemand 보안 검사를 설정하는 기본 동작은 수행되지 않으며, 따라서 다른 모든 부분 또는 완전 신뢰 어셈블리에서 해당 어셈블리를 호출할 수 있습니다.

이 특성이 존재하더라도 기존의 클래스 수준 또는 메서드 수준의 선언적 보안 특성을 포함하여 기타 모든 보안 검사는 원래대로 수행됩니다. 이 특성은 암시적 완전 신뢰 호출자의 요청만 차단합니다.

이것은 선언적 보안 특성은 아니지만 정규 특성입니다 (SecurityAttribute가 아닌 Attribute에서 파생됨).

자세한 내용은 부분 신뢰 코드에서 라이브러리 사용을 참조하십시오.

예제

다음 예제에서는 AllowPartiallyTrustedCallersAttribute 클래스를 사용하는 방법을 보여 줍니다.

' The following HTML code can be used to call the user control in this sample.
'
'<HTML>
'   <BODY>
'       <OBJECT id="usercontrol" classid="usercontrol.dll#UserControl.UserControl1" width="800"
'       height="300" style="font-size:12;">
'       </OBJECT>
'       <p>
'   </BODY>
'</HTML>
' To run this test control you must create a strong name key, snkey.snk, and 
' a code group that gives full trust to assemblies signed with snkey.snk.
' The user control displays an OpenFileDialog box, then displays a text box containing the name of 
' the file selected and a list box that displays the contents of the file.  The selected file must 
' contain text in order for the control to display the data properly.
' Caution  This sample demonstrates the use of the Assert method.  Calling Assert removes the 
' requirement that all code in the call chain must be granted permission to access the specified 
' resource, it can open up security vulnerabilities if used incorrectly or inappropriately. Therefore, 
' it should be used with great caution.  Assert should always be followed with a RevertAssert 
' command to restore the security settings.

Imports System
Imports System.Collections
Imports System.ComponentModel
Imports System.Drawing
Imports System.Data
Imports System.Windows.Forms
Imports System.IO
Imports System.Security
Imports System.Security.Permissions
Imports System.Reflection
Imports System.Runtime.CompilerServices
Imports Microsoft.VisualBasic


' This strong name key is used to create a code group that gives permissions to this assembly.

<Assembly: AssemblyKeyFile("snKey.snk")> 

<Assembly: AssemblyVersion("1.0.0.0")> 
' The AllowPartiallyTrustedCallersAttribute requires the assembly to be signed with a strong name key.
' This attribute is necessary since the control is called by either an intranet or Internet
' Web page that should be running under restricted permissions.

<Assembly: AllowPartiallyTrustedCallers()> 

' The userControl1 displays an OpenFileDialog box, then displays a text box containing the name of 
' the file selected and a list box that displays the contents of the file.  The selected file must 
' contain text in order for the control to display the data properly.

'Demand the zone requirement for the calling application.
<ZoneIdentityPermissionAttribute(SecurityAction.Demand, Zone:=SecurityZone.Intranet)> _
Public Class UserControl1
    Inherits System.Windows.Forms.UserControl
    Private WithEvents textBox1 As System.Windows.Forms.TextBox
    Private listBox1 As System.Windows.Forms.ListBox
    ' Required designer variable.
    Private components As System.ComponentModel.Container = Nothing


    Public Sub New()
        ' This call is required by the Windows.Forms Form Designer.
        InitializeComponent()

        ' The OpenFileDialog box should not require any special permissions.
        Dim fileDialog As New OpenFileDialog
        If fileDialog.ShowDialog() = DialogResult.OK Then
            ' Reading the name of the selected file from the OpenFileDialog box
            ' and reading the file requires FileIOPermission.  The user control should 
            ' have this permission granted through its code group; the Web page that calls the 
            ' control should not have this permission.  The Assert command prevents a stack walk 
            ' that would fail because the caller does not have the required FileIOPermission.  
            ' The use of Assert can open up security vulnerabilities if used incorrectly or 
            ' inappropriately. Therefore, it should be used with great caution.
            ' The Assert command should be followed by a RevertAssert as soon as the file operation 
            ' is completed.
            Dim fileIOPermission As New FileIOPermission(PermissionState.Unrestricted)
            fileIOPermission.Assert()
            textBox1.Text = fileDialog.FileName
            ' Display the contents of the file in the text box.
            Dim fsIn As New FileStream(textBox1.Text, FileMode.Open, FileAccess.Read, FileShare.Read)
            Dim sr As New StreamReader(fsIn)

            ' Process every line in the file
            Dim Line As String
            Line = sr.ReadLine()
            While Not (Line Is Nothing)
                listBox1.Items.Add(Line)
                Line = sr.ReadLine()
            End While
            ' It is very important to call RevertAssert to restore the stack walk for
            ' file operations.
            fileIOPermission.RevertAssert()
        End If
    End Sub 'New


    ' Clean up any resources being used.
    Protected Overloads 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 'Dispose


    ' Required method for Designer support - do not modify 
    ' the contents of this method with the code editor.
    Private Sub InitializeComponent()
        Me.textBox1 = New System.Windows.Forms.TextBox
        Me.listBox1 = New System.Windows.Forms.ListBox
        Me.SuspendLayout()
        ' 
        ' textBox1
        ' 
        Me.textBox1.Location = New System.Drawing.Point(208, 112)
        Me.textBox1.Name = "textBox1"
        Me.textBox1.Size = New System.Drawing.Size(320, 20)
        Me.textBox1.TabIndex = 0
        Me.textBox1.Text = "textBox1"
        ' 
        ' listBox1
        ' 
        Me.listBox1.Location = New System.Drawing.Point(200, 184)
        Me.listBox1.Name = "listBox1"
        Me.listBox1.Size = New System.Drawing.Size(336, 108)
        Me.listBox1.TabIndex = 1
        ' 
        ' UserControl1
        ' 
        Me.Controls.Add(listBox1)
        Me.Controls.Add(textBox1)
        Me.Name = "UserControl1"
        Me.Size = New System.Drawing.Size(592, 400)
        Me.ResumeLayout(False)
    End Sub 'InitializeComponent

    Private Sub UserControl1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
    End Sub 'UserControl1_Load

    Private Sub textBox1_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles textBox1.TextChanged
    End Sub 'textBox1_TextChanged
End Class 'UserControl1 
// The following HTML code can be used to call the user control in this sample.
//
//<HTML>
//  <BODY>
//      <OBJECT id="usercontrol" classid="usercontrol.dll#UserControl.UserControl1" width="800"
//      height="300" style="font-size:12;">
//      </OBJECT>
//      <p>
//  </BODY>
//</HTML>

// To run this test control you must create a strong name key, snkey.snk, and 
// a code group that gives full trust to assemblies signed with snkey.snk.

// The user control displays an OpenFileDialog box, then displays a text box containing the name of 
// the file selected and a list box that displays the contents of the file.  The selected file must 
// contain text in order for the control to display the data properly.

// Caution  This sample demonstrates the use of the Assert method.  Calling Assert removes the 
// requirement that all code in the call chain must be granted permission to access the specified 
// resource, it can open up security vulnerabilities if used incorrectly or inappropriately. Therefore, 
// it should be used with great caution.  Assert should always be followed with a RevertAssert 
// command to restore the security settings.


using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;
using System.IO;
using System.Security;
using System.Security.Permissions;
using System.Reflection;
using System.Runtime.CompilerServices;

// This strong name key is used to create a code group that gives permissions to this assembly.
[assembly: AssemblyKeyFile("snKey.snk")]
[assembly: AssemblyVersion("1.0.0.0")]

// The AllowPartiallyTrustedCallersAttribute requires the assembly to be signed with a strong name key.
// This attribute is necessary since the control is called by either an intranet or Internet
// Web page that should be running under restricted permissions.
[assembly:AllowPartiallyTrustedCallers]
namespace UserControl
{
    // The userControl1 displays an OpenFileDialog box, then displays a text box containing the name of 
    // the file selected and a list box that displays the contents of the file.  The selected file must 
    // contain text in order for the control to display the data properly.
    public class UserControl1 : System.Windows.Forms.UserControl
    {
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.ListBox listBox1;
        // Required designer variable.
        private System.ComponentModel.Container components = null;

              // Demand the zone requirement for the calling application.
              [ZoneIdentityPermission(SecurityAction.Demand, Zone = SecurityZone.Intranet)]
        public UserControl1()
        {
            // This call is required by the Windows.Forms Form Designer.
            InitializeComponent();

            // The OpenFileDialog box should not require any special permissions.
            OpenFileDialog fileDialog = new OpenFileDialog();
            if(fileDialog.ShowDialog() == DialogResult.OK)
            {
                // Reading the name of the selected file from the OpenFileDialog box
                // and reading the file requires FileIOPermission.  The user control should 
                // have this permission granted through its code group; the Web page that calls the 
                // control should not have this permission.  The Assert command prevents a stack walk 
                // that would fail because the caller does not have the required FileIOPermission.  
                // The use of Assert can open up security vulnerabilities if used incorrectly or 
                // inappropriately. Therefore, it should be used with great caution.
                // The Assert command should be followed by a RevertAssert as soon as the file operation 
                // is completed.
                new FileIOPermission(PermissionState.Unrestricted).Assert();
                textBox1.Text = fileDialog.FileName;
                // Display the contents of the file in the text box.
                FileStream fsIn = new FileStream(textBox1.Text, FileMode.Open, FileAccess.Read, 
                    FileShare.Read);
                StreamReader sr = new StreamReader(fsIn);
            
                // Process every line in the file
                for (String Line = sr.ReadLine(); Line != null; Line = sr.ReadLine()) 
                {
                    listBox1.Items.Add(Line);
                }
                // It is very important to call RevertAssert to restore the stack walk for
                // file operations.
                FileIOPermission.RevertAssert();
            }

        }

        // Clean up any resources being used.
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if( components != null )
                    components.Dispose();
            }
            base.Dispose( disposing );
        }

        #region Component Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify 
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.listBox1 = new System.Windows.Forms.ListBox();
            this.SuspendLayout();
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(208, 112);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(320, 20);
            this.textBox1.TabIndex = 0;
            this.textBox1.Text = "textBox1";
            this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
            // 
            // listBox1
            // 
            this.listBox1.Location = new System.Drawing.Point(200, 184);
            this.listBox1.Name = "listBox1";
            this.listBox1.Size = new System.Drawing.Size(336, 108);
            this.listBox1.TabIndex = 1;
            // 
            // UserControl1
            // 
            this.Controls.Add(this.listBox1);
            this.Controls.Add(this.textBox1);
            this.Name = "UserControl1";
            this.Size = new System.Drawing.Size(592, 400);
            this.Load += new System.EventHandler(this.UserControl1_Load);
            this.ResumeLayout(false);

        }
        #endregion

        private void UserControl1_Load(object sender, System.EventArgs e)
        {
        
        }

        private void textBox1_TextChanged(object sender, System.EventArgs e)
        {
        
        }


    }
}

상속 계층 구조

System.Object
   System.Attribute
    System.Security.AllowPartiallyTrustedCallersAttribute

스레드로부터의 안전성

이 형식의 모든 public static(Visual Basic의 경우 Shared) 멤버는 스레드로부터 안전합니다. 인터페이스 멤버는 스레드로부터 안전하지 않습니다.

플랫폼

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework에서 모든 플래폼의 모든 버전을 지원하지는 않습니다. 지원되는 버전의 목록은 시스템 요구 사항을 참조하십시오.

버전 정보

.NET Framework

2.0, 1.1, 1.0에서 지원

참고 항목

참조

AllowPartiallyTrustedCallersAttribute 멤버
System.Security 네임스페이스