MaskGenerationMethod 클래스
모든 마스크 생성기 알고리즘이 파생될 추상 클래스를 나타냅니다.
네임스페이스: System.Security.Cryptography
어셈블리: mscorlib(mscorlib.dll)
구문
‘선언
<ComVisibleAttribute(True)> _
Public MustInherit Class MaskGenerationMethod
‘사용 방법
Dim instance As MaskGenerationMethod
[ComVisibleAttribute(true)]
public abstract class MaskGenerationMethod
[ComVisibleAttribute(true)]
public ref class MaskGenerationMethod abstract
/** @attribute ComVisibleAttribute(true) */
public abstract class MaskGenerationMethod
ComVisibleAttribute(true)
public abstract class MaskGenerationMethod
설명
MaskGenerationMethod의 파생된 클래스가 OAEP(Optimal Asymmetric Encryption Padding)와 같은 키 교환 알고리즘에서 사용된 마스크를 연산합니다.
이 클래스는 마스크 생성만을 위해 키 교환 알고리즘을 구현하여 사용합니다. 응용 프로그램 코드는 이 클래스를 직접 사용하지 않습니다.
예제
다음 코드 예제에서는 MaskGenerationMethod 클래스에서 파생 클래스를 만드는 방법을 보여 줍니다.
Imports System
Imports System.Security.Cryptography
Public Class MaskGenerator
Inherits System.Security.Cryptography.MaskGenerationMethod
Private HashNameValue As String
' Initialize a mask to encrypt using the SHA1 algorithm.
Public Sub New()
HashNameValue = "SHA1"
End Sub
' Create a mask with the specified seed.
Public Overrides Function GenerateMask( _
ByVal seed() As Byte, _
ByVal maskLength As Integer) As Byte()
Dim hash As HashAlgorithm
Dim rgbCounter(4) As Byte
Dim targetRgb(maskLength) As Byte
Dim counter As Integer
For inc As Int16 = 0 To targetRgb.Length
ConvertIntToByteArray(counter + 1, rgbCounter)
hash = CType( _
CryptoConfig.CreateFromName(HashNameValue), _
HashAlgorithm)
Dim temp(4 + seed.Length) As Byte
Buffer.BlockCopy(rgbCounter, 0, temp, 0, 4)
Buffer.BlockCopy(seed, 0, temp, 4, seed.Length)
hash.ComputeHash(temp)
If (targetRgb.Length - inc > hash.HashSize / 8) Then
Buffer.BlockCopy( _
hash.Hash, 0, targetRgb, inc, hash.Hash.Length)
Else
Buffer.BlockCopy( _
hash.Hash, 0, targetRgb, inc, targetRgb.Length - inc)
End If
inc += hash.Hash.Length
Next
Return targetRgb
End Function
' Convert the specified integer to the byte array.
Private Sub ConvertIntToByteArray( _
ByVal sourceInt As Integer, _
ByRef targetBytes() As Byte)
Dim remainder As Integer
Dim inc As Int16 = 0
' Clear the array prior to filling it.
Array.Clear(targetBytes, 0, targetBytes.Length)
While (sourceInt > 0)
remainder = sourceInt Mod 256
targetBytes(3 - inc) = CType(remainder, Byte)
sourceInt = (sourceInt - remainder) / 256
inc = inc + 1
End While
End Sub
End Class
Public Class Form1
Inherits System.Windows.Forms.Form
' Event handler for Run button.
Private Sub Button1_Click( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
tbxOutput.Cursor = Cursors.WaitCursor
tbxOutput.Text = ""
Dim seed() As Byte = {&H1, &H2, &H3, &H4}
Dim length As Int16 = 16
Dim maskGenerator As New MaskGenerator
Dim mask() As Byte = maskGenerator.GenerateMask(seed, length)
tbxOutput.AppendText("Generated the following mask:")
tbxOutput.AppendText(System.Text.Encoding.ASCII.GetString(mask))
' Align interface and conclude application.
tbxOutput.AppendText(vbCrLf + "This sample completed" + _
"successfully; press Exit to continue.")
tbxOutput.Cursor = Cursors.Default
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 = "MaskGenerationMethod"
Me.Panel2.ResumeLayout(False)
Me.Panel1.ResumeLayout(False)
Me.ResumeLayout(False)
End Sub
#End Region
End Class
'
' This sample produces the following output:
'
' Generated the following mask:~&*(uj98U(*UD989D
' This sample completedsuccessfully; press Exit to continue.
using System;
using System.Security.Cryptography;
namespace Contoso
{
class MaskGenerator : System.Security.Cryptography.MaskGenerationMethod
{
private String HashNameValue;
// Initialize a mask to encrypt using the SHA1 algorithm.
public MaskGenerator()
{
HashNameValue = "SHA1";
}
// Create a mask with the specified seed.
override public byte[] GenerateMask(byte[] seed, int maskLength)
{
HashAlgorithm hash;
byte[] rgbCounter = new byte[4];
byte[] targetRgb = new byte[maskLength];
uint counter = 0;
for (int inc = 0; inc < targetRgb.Length; )
{
ConvertIntToByteArray(counter++, ref rgbCounter);
hash = (HashAlgorithm)
CryptoConfig.CreateFromName(HashNameValue);
byte[] temp = new byte[4 + seed.Length];
Buffer.BlockCopy(rgbCounter, 0, temp, 0, 4);
Buffer.BlockCopy(seed, 0, temp, 4, seed.Length);
hash.ComputeHash(temp);
if (targetRgb.Length - inc > hash.HashSize/8)
{
Buffer.BlockCopy(
hash.Hash,
0,
targetRgb,
inc,
hash.Hash.Length);
}
else
{
Buffer.BlockCopy(
hash.Hash,
0,
targetRgb,
inc,
targetRgb.Length - inc);
}
inc += hash.Hash.Length;
}
return targetRgb;
}
// Convert the specified integer to the byte array.
private void ConvertIntToByteArray(
uint sourceInt,
ref byte[] targetBytes)
{
uint remainder;
int inc = 0;
// Clear the array prior to filling it.
Array.Clear(targetBytes, 0, targetBytes.Length);
while (sourceInt > 0)
{
remainder = sourceInt % 256;
targetBytes[3 - inc] = (byte) remainder;
sourceInt = (sourceInt - remainder)/256;
inc++;
}
}
}
// This class demonstrates how to create the MaskGenerator class
// and call its GenerateMask member.
class MaskGeneratorImpl
{
public static void Main(string[] args)
{
byte[] seed = new byte[] {0x01, 0x02, 0x03, 0x04};
int length = 16;
MaskGenerator maskGenerator = new MaskGenerator();
byte[] mask = maskGenerator.GenerateMask(seed, length);
Console.WriteLine("Generated the following mask:");
Console.WriteLine(System.Text.Encoding.ASCII.GetString(mask));
Console.WriteLine("This sample completed successfully; " +
"press Enter to exit.");
Console.ReadLine();
}
}
}
//
// This sample produces the following output:
//
// Generated the following mask:
// ?"TFd(?~OtO?
// This sample completed successfully; press Enter to exit.
#using <System.dll>
using namespace System;
using namespace System::Security::Cryptography;
namespace Contoso
{
ref class MaskGenerator: MaskGenerationMethod
{
private:
String^ hashNameValue;
public:
// Initialize a mask to encrypt using the SHA1 algorithm.
MaskGenerator()
{
hashNameValue = "SHA1";
}
// Create a mask with the specified seed.
virtual array<Byte>^ GenerateMask(array<Byte>^ seed, int maskLength) override
{
HashAlgorithm^ hash;
array<Byte>^ rgbCounter = gcnew array<Byte>(4);
array<Byte>^ targetRgb = gcnew array<Byte>(maskLength);
UInt32 counter = 0;
for (int inc = 0; inc < targetRgb->Length; )
{
ConvertIntToByteArray(counter++, rgbCounter);
hash = (HashAlgorithm^)CryptoConfig::CreateFromName(
hashNameValue);
array<Byte>^ temp = gcnew array<Byte>(
4 + seed->Length);
Buffer::BlockCopy(rgbCounter, 0, temp, 0, 4);
Buffer::BlockCopy(seed, 0, temp, 4, seed->Length);
hash->ComputeHash(temp);
if (targetRgb->Length - inc > hash->HashSize / 8)
{
Buffer::BlockCopy(hash->Hash, 0, targetRgb, inc,
hash->Hash->Length);
}
else
{
Buffer::BlockCopy(hash->Hash, 0, targetRgb, inc,
targetRgb->Length - inc);
}
inc += hash->Hash->Length;
}
return targetRgb;
}
private:
// Convert the specified integer to the byte array.
void ConvertIntToByteArray(UInt32 source,
array<Byte>^ targetBytes)
{
UInt32 remainder;
int inc = 0;
// Clear the array prior to filling it.
Array::Clear(targetBytes, 0, targetBytes->Length);
while (source > 0)
{
remainder = source % 256;
targetBytes[ 3 - inc ] = (Byte)remainder;
source = (source - remainder) / 256;
inc++;
}
}
};
// This class demonstrates how to create the MaskGenerator class
// and call its GenerateMask member.
ref class MaskGeneratorImpl
{
public:
void static Work()
{
array<Byte>^ seed = gcnew array<Byte>(4){
0x01,0x02,0x03,0x04};
int length = 16;
MaskGenerator^ maskGenerator = gcnew MaskGenerator;
array<Byte>^ mask = maskGenerator->GenerateMask(seed,
length);
Console::WriteLine("Generated the following mask:");
Console::WriteLine(System::Text::Encoding::
ASCII::get()->GetString(mask));
Console::WriteLine("This sample completed successfully;"
" press Enter to exit.");
Console::ReadLine();
}
};
}
void main()
{
Contoso::MaskGeneratorImpl::Work();
}
//
// This sample produces the following output:
//
// Generated the following mask:
// ?"TFd(?~OtO?
// This sample completed successfully; press Enter to exit.
import System.*;
import System.Security.Cryptography.*;
class MaskGenerator extends System.Security.Cryptography.MaskGenerationMethod
{
private String hashNameValue;
// Initialize a mask to encrypt using the SHA1 algorithm.
public MaskGenerator()
{
hashNameValue = "SHA1";
} //MaskGenerator
// Create a mask with the specified seed.
public ubyte[] GenerateMask(ubyte seed[], int maskLength)
{
HashAlgorithm hash;
ubyte rgbCounter[] = new ubyte[4];
ubyte targetRgb[] = new ubyte[maskLength];
int counter = 0;
for (int inc = 0; inc < targetRgb.get_Length(); ) {
ConvertIntToByteArray(counter++, rgbCounter);
hash = ((HashAlgorithm)CryptoConfig.CreateFromName(hashNameValue));
ubyte temp[] = new ubyte[4 + seed.get_Length()];
Buffer.BlockCopy(rgbCounter, 0, temp, 0, 4);
Buffer.BlockCopy(seed, 0, temp, 4, seed.get_Length());
hash.ComputeHash(temp);
if (targetRgb.get_Length() - inc > hash.get_HashSize() / 8) {
Buffer.BlockCopy(hash.get_Hash(), 0, targetRgb, inc,
hash.get_Hash().get_Length());
}
else {
Buffer.BlockCopy(hash.get_Hash(), 0, targetRgb, inc,
targetRgb.get_Length() - inc);
}
inc += hash.get_Hash().get_Length();
}
return targetRgb;
} //GenerateMask
// Convert the specified integer to the byte array.
private void ConvertIntToByteArray(int sourceInt, ubyte targetBytes[])
{
int remainder;
int inc = 0;
// Clear the array prior to filling it.
Array.Clear(targetBytes, 0, targetBytes.get_Length());
while (sourceInt > 0) {
remainder = sourceInt % 256;
targetBytes.set_Item((3 - inc), (Int32)remainder);
sourceInt = (sourceInt - remainder) / 256;
inc++;
}
} //ConvertIntToByteArray
} //MaskGenerator
// This class demonstrates how to create the MaskGenerator class
// and call its GenerateMask member.
class MaskGeneratorImpl
{
public static void main(String[] args)
{
ubyte seed[] = new ubyte[] { 0x1, 0x2, 0x3, 0x4 };
int length = 16;
MaskGenerator maskGenerator = new MaskGenerator();
ubyte mask[] = maskGenerator.GenerateMask(seed, length);
Console.WriteLine("Generated the following mask:");
Console.WriteLine(System.Text.Encoding.get_ASCII().GetString(mask));
Console.WriteLine("This sample completed successfully; "
+ "press Enter to exit.");
Console.ReadLine();
} //main
} //MaskGeneratorImpl
//
// This sample produces the following output:
//
// Generated the following mask:
// ?"TFd(?~OtO?
// This sample completed successfully; press Enter to exit.
상속 계층 구조
System.Object
System.Security.Cryptography.MaskGenerationMethod
System.Security.Cryptography.PKCS1MaskGenerationMethod
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