ObfuscationAttribute 類別

定義

命名空間:

System.Reflection

組件:

netstandard.dll, System.Runtime.dll

來源:

ObfuscationAttribute.cs

指示模糊化工具針對元件、類型或成員採取指定的動作。

public ref class ObfuscationAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Delegate | System.AttributeTargets.Enum | System.AttributeTargets.Event | System.AttributeTargets.Field | System.AttributeTargets.Interface | System.AttributeTargets.Method | System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
public sealed class ObfuscationAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Delegate | System.AttributeTargets.Enum | System.AttributeTargets.Event | System.AttributeTargets.Field | System.AttributeTargets.Interface | System.AttributeTargets.Method | System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
type ObfuscationAttribute = class
    inherit Attribute

Public NotInheritable Class ObfuscationAttribute
Inherits Attribute

繼承

Object

Attribute

ObfuscationAttribute

屬性

AttributeUsageAttribute

範例

以下程式碼範例展示了一個具有兩種類型的公共assembly： Type1 和 Type2。 該組件被標記為混淆，該 ObfuscateAssemblyAttribute標記為公用（即 AssemblyIsPrivate 屬性為 false）。

Type1 標記為混淆，因為該組件本身標記為混淆。 其中 Type1 一成員被排除在混淆之外，使用該 Exclude 性質。

Type2 被排除在混淆之外，但其成員因性質 ApplyToMembers 為 false而標記為混淆。

MethodA方法Type2以該屬性的值"default"Feature標示。 必須指定false屬性以避免被MethodA排除混淆，因為屬性Exclude的預設值為 trueExclude 。 混淆工具在混淆後不應剝除屬性，因為屬性 StripAfterObfuscation 為 false。 本程式碼範例中其他屬性在混淆後被剝除，因為 StripAfterObfuscation 該屬性未被指定，因此預設為 true。

程式碼範例包含顯示屬性及其屬性的程式碼。 你也可以打開帶有 Ildasm.exe（IL 反組譯器）的 DLL 來檢查屬性。

using System;
using System.Reflection;

// Mark this public assembly for obfuscation.
[assembly:ObfuscateAssemblyAttribute(false)]

// This class is marked for obfuscation, because the assembly
// is marked.
public class Type1
{

    // Exclude this method from obfuscation. The default value
    // of the Exclude property is true, so it is not necessary
    // to specify Exclude=True, although spelling it out makes
    // your intent clearer.
    [ObfuscationAttribute(Exclude=true)]
    public void MethodA() {}

    // This member is marked for obfuscation because the class
    // is marked.
    public void MethodB() {}
}

// Exclude this type from obfuscation, but do not apply that
// exclusion to members. The default value of the Exclude
// property is true, so it is not necessary to specify
// Exclude=true, although spelling it out makes your intent
// clearer.
[ObfuscationAttribute(Exclude=true, ApplyToMembers=false)]
public class Type2
{

    // The exclusion of the type is not applied to its members,
    // however in order to mark the member with the "default"
    // feature it is necessary to specify Exclude=false,
    // because the default value of Exclude is true. The tool
    // should not strip this attribute after obfuscation.
    [ObfuscationAttribute(Exclude=false, Feature="default",
        StripAfterObfuscation=false)]
    public void MethodA() {}

    // This member is marked for obfuscation, because the
    // exclusion of the type is not applied to its members.
    public void MethodB() {}
}

// This class only exists to provide an entry point for the
// assembly and to display the attribute values.
internal class Test
{

    public static void Main()
    {

        // Display the ObfuscateAssemblyAttribute properties
        // for the assembly.
        Assembly assem = typeof(Test).Assembly;
        object[] assemAttrs = assem.GetCustomAttributes(
            typeof(ObfuscateAssemblyAttribute), false);

        foreach( Attribute a in assemAttrs )
        {
            ShowObfuscateAssembly((ObfuscateAssemblyAttribute) a);
        }

        // Display the ObfuscationAttribute properties for each
        // type that is visible to users of the assembly.
        foreach( Type t in assem.GetTypes() )
        {
            if (t.IsVisible)
            {
                object[] tAttrs = t.GetCustomAttributes(
                    typeof(ObfuscationAttribute), false);

                foreach( Attribute a in tAttrs )
                {
                    ShowObfuscation(((ObfuscationAttribute) a),
                        t.Name);
                }

                // Display the ObfuscationAttribute properties
                // for each member in the type.
                foreach( MemberInfo m in t.GetMembers() )
                {
                    object[] mAttrs = m.GetCustomAttributes(
                        typeof(ObfuscationAttribute), false);

                    foreach( Attribute a in mAttrs )
                    {
                        ShowObfuscation(((ObfuscationAttribute) a),
                            t.Name + "." + m.Name);
                    }
                }
            }
        }
    }

    private static void ShowObfuscateAssembly(
        ObfuscateAssemblyAttribute ob)
    {
        Console.WriteLine("\r\nObfuscateAssemblyAttribute properties:");
        Console.WriteLine("   AssemblyIsPrivate: {0}",
            ob.AssemblyIsPrivate);
        Console.WriteLine("   StripAfterObfuscation: {0}",
            ob.StripAfterObfuscation);
    }

    private static void ShowObfuscation(
        ObfuscationAttribute ob, string target)
    {
        Console.WriteLine("\r\nObfuscationAttribute properties for: {0}",
            target);
        Console.WriteLine("   Exclude: {0}", ob.Exclude);
        Console.WriteLine("   Feature: {0}", ob.Feature);
        Console.WriteLine("   StripAfterObfuscation: {0}",
            ob.StripAfterObfuscation);
        Console.WriteLine("   ApplyToMembers: {0}", ob.ApplyToMembers);
    }
}

/* This code example produces the following output:

ObfuscateAssemblyAttribute properties:
   AssemblyIsPrivate: False
   StripAfterObfuscation: True

ObfuscationAttribute properties for: Type1.MethodA
   Exclude: True
   Feature: all
   StripAfterObfuscation: True
   ApplyToMembers: True

ObfuscationAttribute properties for: Type2
   Exclude: True
   Feature: all
   StripAfterObfuscation: True
   ApplyToMembers: False

ObfuscationAttribute properties for: Type2.MethodA
   Exclude: False
   Feature: default
   StripAfterObfuscation: False
   ApplyToMembers: True
 */

Imports System.Reflection

' Mark this public assembly for obfuscation.
<Assembly: ObfuscateAssemblyAttribute(False)>

' This class is marked for obfuscation, because the assembly
' is marked.
Public Class Type1

    ' Exclude this method from obfuscation. The default value
    ' of the Exclude property is True, so it is not necessary
    ' to specify Exclude:=True, although spelling it out makes
    ' your intent clearer.
    <ObfuscationAttribute(Exclude:=True)> _
    Public Sub MethodA()
    End Sub

    ' This member is marked for obfuscation because the class
    ' is marked.
    Public Sub MethodB()
    End Sub

End Class

' Exclude this type from obfuscation, but do not apply that
' exclusion to members. The default value of the Exclude 
' property is True, so it is not necessary to specify 
' Exclude:=True, although spelling it out makes your intent 
' clearer.
<ObfuscationAttribute(Exclude:=True, ApplyToMembers:=False)> _
Public Class Type2

    ' The exclusion of the type is not applied to its members,
    ' however in order to mark the member with the "default" 
    ' feature it is necessary to specify Exclude:=False,
    ' because the default value of Exclude is True. The tool
    ' should not strip this attribute after obfuscation.
    <ObfuscationAttribute(Exclude:=False, _
        Feature:="default", StripAfterObfuscation:=False)> _
    Public Sub MethodA()
    End Sub

    ' This member is marked for obfuscation, because the 
    ' exclusion of the type is not applied to its members.
    Public Sub MethodB()
    End Sub

End Class

' This class only exists to provide an entry point for the
' assembly and to display the attribute values.
Friend Class Test

    Public Shared Sub Main()

        ' Display the ObfuscateAssemblyAttribute properties
        ' for the assembly.        
        Dim assem As Assembly =GetType(Test).Assembly
        Dim assemAttrs() As Object = _
            assem.GetCustomAttributes( _
                GetType(ObfuscateAssemblyAttribute), _
                False)

        For Each a As Attribute In assemAttrs
            ShowObfuscateAssembly(CType(a, ObfuscateAssemblyAttribute))
        Next

        ' Display the ObfuscationAttribute properties for each
        ' type that is visible to users of the assembly.
        For Each t As Type In assem.GetTypes()
            If t.IsVisible Then
                Dim tAttrs() As Object = _
                    t.GetCustomAttributes( _
                        GetType(ObfuscationAttribute), _
                        False)

                For Each a As Attribute In tAttrs
                    ShowObfuscation(CType(a, ObfuscationAttribute), _
                        t.Name)
                Next

                ' Display the ObfuscationAttribute properties
                ' for each member in the type.
                For Each m As MemberInfo In t.GetMembers()
                    Dim mAttrs() As Object = _
                        m.GetCustomAttributes( _
                            GetType(ObfuscationAttribute), _
                            False)

                    For Each a As Attribute In mAttrs
                        ShowObfuscation(CType(a, ObfuscationAttribute), _
                            t.Name & "." & m.Name)
                    Next
                Next
            End If
        Next
    End Sub

    Private Shared Sub ShowObfuscateAssembly( _
        ByVal ob As ObfuscateAssemblyAttribute)
        
        Console.WriteLine(vbCrLf & "ObfuscateAssemblyAttribute properties:")
        Console.WriteLine("   AssemblyIsPrivate: " _
            & ob.AssemblyIsPrivate)
        Console.WriteLine("   StripAfterObfuscation: " _
            & ob.StripAfterObfuscation)

    End Sub

    Private Shared Sub ShowObfuscation( _
        ByVal ob As ObfuscationAttribute, _
        ByVal target As String)
        
        Console.WriteLine(vbCrLf _
            & "ObfuscationAttribute properties for: " _
            & target)
        Console.WriteLine("   Exclude: " & ob.Exclude)
        Console.WriteLine("   Feature: " & ob.Feature)
        Console.WriteLine("   StripAfterObfuscation: " _
            & ob.StripAfterObfuscation)
        Console.WriteLine("   ApplyToMembers: " & ob.ApplyToMembers)

    End Sub
End Class

' This code example produces the following output:
'
'ObfuscateAssemblyAttribute properties:
'   AssemblyIsPrivate: False
'   StripAfterObfuscation: True
'
'ObfuscationAttribute properties for: Type1.MethodA
'   Exclude: True
'   Feature: all
'   StripAfterObfuscation: True
'   ApplyToMembers: True
'
'ObfuscationAttribute properties for: Type2
'   Exclude: True
'   Feature: all
'   StripAfterObfuscation: True
'   ApplyToMembers: False
'
'ObfuscationAttribute properties for: Type2.MethodA
'   Exclude: False
'   Feature: default
'   StripAfterObfuscation: False
'   ApplyToMembers: True

備註

ObfuscationAttribute與ObfuscateAssemblyAttribute屬性允許組合語言作者註解其二進位檔，使混淆工具能以最小的外部設定正確處理它們。

這很重要

套用此屬性不會自動混淆你套用該屬性的程式碼實體。 套用該屬性是建立混淆工具設定檔的替代方案。 也就是說，它僅提供混淆工具的指令。 Microsoft 建議混淆工具的廠商遵循此處描述的語意。 然而，無法保證某個工具一定遵循 Microsoft 的建議。

該 ObfuscationAttribute 屬性具有字串 Feature 屬性。 混淆工具可以將此屬性的字串值映射到他們實作的功能，最好是透過使用者可存取的 XML 設定檔。 它 ObfuscationAttribute 定義了兩個功能字串，分別是「default」和「all」。 字串「default」應對應工具的預設混淆功能，而「all」則應對應工具所支援的完整混淆功能集合。 屬性的預設值 Feature 為「all」，使得完整的混淆功能組合得以實現。

應用於組件時， ObfuscationAttribute 也適用於組件內所有類型。 若 ApplyToMembers 屬性未指定，或設定為 true，該屬性也適用於所有成員。 ObfuscationAttribute 並未明確規定集會是公開還是私人。 要指定組裝是公開還是私有，請使用屬性。ObfuscateAssemblyAttribute

當應用於類別與結構時，ObfuscationAttribute若未指定屬性或設定為 true，也適用於所有該型別ApplyToMembers的成員。

當該屬性套用於方法、參數、欄位與屬性時，僅影響被套用的實體。

建構函式

名稱	Description
ObfuscationAttribute()	初始化 ObfuscationAttribute 類別的新執行個體。

屬性

名稱	Description
ApplyToMembers	取得或設定一個 Boolean 值，表示某型態的屬性是否套用到該型別的成員。
Exclude	取得或設定一個 Boolean 值，指示混淆工具是否應排除該類型或成員。
Feature	取得或設定一個字串值，該字串被混淆工具識別，並指定處理選項。
StripAfterObfuscation	取得或設定一個 Boolean 值，指示混淆工具在處理後是否應移除此屬性。
TypeId	在衍生類別中實作時，取得這個 Attribute的唯一標識碼。 (繼承來源 Attribute)

方法

名稱	Description
Equals(Object)	傳回值，這個值表示這個實例是否等於指定的物件。 (繼承來源 Attribute)
GetHashCode()	傳回這個實例的哈希碼。 (繼承來源 Attribute)
GetType()	取得目前實例的 Type。 (繼承來源 Object)
IsDefaultAttribute()	在衍生類別中覆寫時，指出這個實例的值是否為衍生類別的預設值。 (繼承來源 Attribute)
Match(Object)	在衍生類別中覆寫時，傳回值，指出這個實例是否等於指定的物件。 (繼承來源 Attribute)
MemberwiseClone()	建立目前 Object的淺層複本。 (繼承來源 Object)
ToString()	傳回表示目前 物件的字串。 (繼承來源 Object)

另請參閱

• ObfuscateAssemblyAttribute