KeySizes Класс

Определение

Определяет набор допустимых размеров ключа для симметричных алгоритмов шифрования.Determines the set of valid key sizes for the symmetric cryptographic algorithms.

``public ref class KeySizes sealed``
``public sealed class KeySizes``
``````[System.Runtime.InteropServices.ComVisible(true)]
public sealed class KeySizes``````
``type KeySizes = class``
``````[<System.Runtime.InteropServices.ComVisible(true)>]
type KeySizes = class``````
``Public NotInheritable Class KeySizes``
Наследование
KeySizes
Атрибуты

Примеры

В следующем примере показано использование членов KeySizes класса.The following example shows the use of members of the KeySizes class.

``````
using namespace System;
using namespace System::Security::Cryptography;

namespace CryptographySample
{
ref class KeySizesMembers
{
public:
static void Work()
{
// Initializes a new instance of the KeySizes class
// with the specified key values.
int minSize = 64;
int maxSize = 1024;
int skipSize = 64;
KeySizes^ keySizes =
gcnew KeySizes(minSize, maxSize, skipSize);

// Show the values of the keys.
ShowKeys(gcnew array<KeySizes^>(1) {keySizes},
"Custom Keys");

// Create a new symmetric algorithm and display its
// key values.
Aes^ aes = Aes::Create();
ShowKeys(aes->LegalKeySizes, aes->ToString());
Console::WriteLine("aes.blocksize:{0}",
aes->BlockSize);

// Create a new RSA algorithm and display its key values.
RSA^ rsa = RSA::Create();
ShowKeys(rsa->LegalKeySizes, rsa->ToString());
Console::WriteLine("RSA KeySize ="
" {0}",
rsa->KeySize);

Console::WriteLine("This sample completed successfully; "
"press Enter to exit.");
}

private:
// Display specified KeySize properties to the console.
static void ShowKeys(array <KeySizes^>^ keySizes,
String^ objectName)
{
// Retrieve the first KeySizes in the array.
KeySizes^ firstKeySize = keySizes[0];

// Retrieve the minimum key size in bits.
int minKeySize = firstKeySize->MinSize;

// Retrieve the maximum key size in bits.
int maxKeySize = firstKeySize->MaxSize;

// Retrieve the interval between valid key size in bits.
int skipKeySize = firstKeySize->SkipSize;

Console::WriteLine("{0} object.", objectName);
Console::WriteLine("Minimum key size bits: {0}",
minKeySize);
Console::WriteLine("Maximum key size bits: {0}",
maxKeySize);
Console::WriteLine("Interval between key size bits: {0}",
skipKeySize);
}
};
}

using namespace CryptographySample;

int main()
{
KeySizesMembers::Work();
}
//
// This sample produces the following output:
//
// Minimum key size bits: 64
// Maximum key size bits: 1024
// Interval between key size bits: 64
//
//  System.Security.Cryptography.Aes object.
// Minimum key size bits: 128
// Maximum key size bits: 256
// Interval between key size bits: 64
// aes.blocksize:128
//
// System.Security.Cryptography.RSA object.
// Minimum key size bits: 512
// Maximum key size bits: 16384
// Interval between key size bits: 64
// RSA KeySize = 2048
// This sample completed successfully; press Enter to exit.
``````
``````using System;
using System.Security.Cryptography;

namespace Contoso
{
class KeySizesMembers
{
static void Main(string[] args)
{
// Initializes a new instance of the KeySizes class with the
// specified key values.
int minSize = 64;
int maxSize = 1024;
int skipSize = 64;
KeySizes keySizes = new KeySizes(minSize, maxSize, skipSize);

// Show the values of the keys.
ShowKeys(new KeySizes[1]{keySizes}, "Custom Keys");

// Create a new symmetric algorithm and display its key values.
Aes aes = Aes.Create();
ShowKeys(aes.LegalKeySizes, aes.ToString());
Console.WriteLine("aes.blocksize:" + aes.BlockSize);

// Create a new RSA algorithm and display its key values.
RSA rsa = RSA.Create();
ShowKeys(rsa.LegalKeySizes, rsa.ToString());
Console.WriteLine("RSA KeySize = " +
rsa.KeySize);

Console.WriteLine("This sample completed successfully; " +
"press Enter to exit.");
}

// Display specified KeySize properties to the console.
private static void ShowKeys(KeySizes[] keySizes, string objectName)
{
// Retrieve the first KeySizes in the array.
KeySizes firstKeySize = keySizes[0];

// Retrieve the minimum key size in bits.
int minKeySize = firstKeySize.MinSize;

// Retrieve the maximum key size in bits.
int maxKeySize = firstKeySize.MaxSize;

// Retrieve the interval between valid key size in bits.
int skipKeySize = firstKeySize.SkipSize;

Console.WriteLine(objectName + " object.");
Console.WriteLine("Minimum key size bits: " + minKeySize);
Console.WriteLine("Maximum key size bits: " + maxKeySize);
Console.WriteLine("Interval between key size bits: " +
skipKeySize);
}
}
}
//
// This sample produces the following output:
//
// Minimum key size bits: 64
// Maximum key size bits: 1024
// Interval between key size bits: 64
//
// object.
// Minimum key size bits: 128
// Maximum key size bits: 256
// Interval between key size bits: 64
// aes.blocksize:128
//
// System.Security.Cryptography.RSA object.
// Minimum key size bits: 512
// Maximum key size bits: 16384
// Interval between key size bits: 64
// RSA KeySize = 2048
// This sample completed successfully; press Enter to exit.
``````
``````Imports System.Security.Cryptography

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 = ""

' Initializes a new instance of the KeySizes class with the
' specified key values.
Dim MinSize As Integer = 64
Dim MaxSize As Integer = 1024
Dim SkipSize As Integer = 64
Dim keySizes As New KeySizes(MinSize, MaxSize, SkipSize)

' Show the values of the keys.
ShowKeys(New KeySizes(0) {keySizes}, "Custom Keys")

' Create a new symmetric algorithm and display its key values.
Dim aes As Aes = Aes.Create()
WriteLine("aes.blocksize:" + aes.BlockSize.ToString())
ShowKeys(aes.LegalKeySizes, aes.ToString())

' Create a new RSA algorithm and display its key values.
Dim rsa As RSA = RSA.Create()
WriteLine("RSA KeySize = " + _
rsa.KeySize.ToString())
ShowKeys(rsa.LegalKeySizes, rsa.ToString())

' Reset the cursor and conclude application.
WriteLine("This sample completed successfully;" + _
" press Exit to continue.")
tbxOutput.Cursor = Cursors.Default
End Sub

' Display specified KeySize properties to output textbox.
Private Sub ShowKeys( _
ByVal KeySizes() As KeySizes, _
ByVal objectName As String)

' Retrieve the first KeySizes in the array.
Dim firstKeySize As KeySizes = KeySizes(0)

' Retrieve the minimum key size in bits.
Dim minKeySize As Integer = firstKeySize.MinSize

' Retrieve the maximum key size in bits.
Dim maxKeySize As Integer = firstKeySize.MaxSize

' Retrieve the interval between valid key size in bits.
Dim skipKeySize As Integer = firstKeySize.SkipSize

WriteLine("Minimum key size bits: " + minKeySize.ToString())
WriteLine("Maximum key size bits: " + maxKeySize.ToString())
WriteLine("Interval between key size bits: " + skipKeySize.ToString())
WriteLine("")
End Sub
' Display the message to the textbox with a carriage return and line feed.
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.Dock = System.Windows.Forms.DockStyle.Bottom
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.Dock = System.Windows.Forms.DockStyle.Fill
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.Name = "Form1"
Me.Text = "KeySizes"
Me.Panel2.ResumeLayout(False)
Me.Panel1.ResumeLayout(False)
Me.ResumeLayout(False)

End Sub

#End Region
End Class
'
' This sample produces the following output:
'
' Minimum key size bits: 64
' Maximum key size bits: 1024
' Interval between key size bits: 64
'
' aes.blocksize:128
' object.
' Minimum key size bits: 128
' Maximum key size bits: 256
' Interval between key size bits: 64
'
' RSA KeySize = 2048
' System.Security.Cryptography.RSA object.
' Minimum key size bits: 512
' Maximum key size bits: 16384
' Interval between key size bits: 64
'
' This sample completed successfully; press Exit to continue.
``````

Конструкторы

 Инициализирует новый экземпляр класса KeySizes с указанными значениями ключа.Initializes a new instance of the KeySizes class with the specified key values.

Свойства

 Задает максимальный размер ключа.Specifies the maximum key size. Задает минимальный размер ключа.Specifies the minimum key size. Задает интервал между допустимыми размерами ключа.Specifies the interval between valid key sizes.

Методы

 Определяет, равен ли указанный объект текущему объекту.Determines whether the specified object is equal to the current object. (Унаследовано от Object) Служит хэш-функцией по умолчанию.Serves as the default hash function. (Унаследовано от Object) Возвращает объект Type для текущего экземпляра.Gets the Type of the current instance. (Унаследовано от Object) Создает неполную копию текущего объекта Object.Creates a shallow copy of the current Object. (Унаследовано от Object) Возвращает строку, представляющую текущий объект.Returns a string that represents the current object. (Унаследовано от Object)