SignatureDescriptionとは? わかりやすく解説

SignatureDescription クラス

デジタル署名プロパティに関する情報格納します

名前空間: System.Security.Cryptography
アセンブリ: mscorlib (mscorlib.dll 内)
構文構文

<ComVisibleAttribute(True)> _
Public Class SignatureDescription
Dim instance As SignatureDescription
[ComVisibleAttribute(true)] 
public class SignatureDescription
[ComVisibleAttribute(true)] 
public ref class SignatureDescription
/** @attribute ComVisibleAttribute(true) */ 
public class SignatureDescription
ComVisibleAttribute(true) 
public class SignatureDescription
使用例使用例

SignatureDescription クラスメンバ使用する方法次のコード例示します

Imports System
Imports System.Security
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 = ""

        ' Create a digital signature based on RSA encryption.
        Dim rsaSignature As SignatureDescription
 = CreateRSAPKCS1Signature()
        ShowProperties(rsaSignature)

        ' Create a digital signature based on DSA encryption.
        Dim dsaSignature As SignatureDescription
 = CreateDSASignature()
        ShowProperties(dsaSignature)

        ' Create a HashAlgorithm using the digest algorithm of the signature.
        Dim hashAlgorithm As HashAlgorithm
 = dsaSignature.CreateDigest()
        WriteLine("Hash algorithm for the DigestAlgorithm property:
 " + _
            hashAlgorithm.ToString())

        ' Create an AsymmetricSignatureFormatter instance using the
 DSA key.
        Dim dsa As DSA = dsa.Create()
        Dim asymmetricFormatter As AsymmetricSignatureFormatter
 = _
            CreateDSAFormatter(dsa)

        ' Create an AsymmetricSignatureDeformatter instance using the
 DSA key.
        dim asymmetricDeformatter as AsymmetricSignatureDeformatter
 = _
            CreateDSADeformatter(dsa)

        ' Align interface and conclude application.
        WriteLine("This sample completed successfully;"
 + _
            " press Exit to continue.")

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

    ' Create a SignatureDescription for RSA encryption.
    Private Function CreateRSAPKCS1Signature()
 As SignatureDescription
        Dim signatureDescription As New
 SignatureDescription

        ' Set the key algorithm property for RSA encryption.
        signatureDescription.KeyAlgorithm = _
            "System.Security.Cryptography.RSACryptoServiceProvider"

        ' Set the digest algorithm for RSA encryption using the SHA1
 provider.
        signatureDescription.DigestAlgorithm = _
            "System.Security.Cryptography.SHA1CryptoServiceProvider"

        ' Set the formatter algorithm with the RSAPKCS1 formatter.
        signatureDescription.FormatterAlgorithm = _
            "System.Security.Cryptography.RSAPKCS1SignatureFormatter"

        ' Set the formatter algorithm with the RSAPKCS1 deformatter.
        signatureDescription.DeformatterAlgorithm = _
            "System.Security.Cryptography.RSAPKCS1SignatureDeformatter"

        Return SignatureDescription
    End Function

    ' Create a SignatureDescription using a constructed SecurityElement
 for 
    ' DSA encryption.
    Private Function CreateDSASignature() As
 SignatureDescription
        Dim securityElement As New
 SecurityElement("DSASignature")

        ' Create new security elements for the four algorithms.
        securityElement.AddChild(new SecurityElement( _
            "Key", _
            "System.Security.Cryptography.DSACryptoServiceProvider"))
        securityElement.AddChild(New SecurityElement( _
            "Digest", _
            "System.Security.Cryptography.SHA1CryptoServiceProvider"))
        securityElement.AddChild(new SecurityElement( _
            "Formatter", _
            "System.Security.Cryptography.DSASignatureFormatter"))
        securityElement.AddChild(new SecurityElement( _
            "Deformatter", _
            "System.Security.Cryptography.DSASignatureDeformatter"))

        Dim signatureDescription As New
 SignatureDescription(securityElement)

        Return signatureDescription
    End Function

    ' Create a signature formatter for DSA encryption.
    Private Function CreateDSAFormatter(ByVal
 dsa As DSA) _
        As AsymmetricSignatureFormatter

        ' Create a DSA signature formatter for encryption.
        Dim signatureDescription As New
 SignatureDescription
        signatureDescription.FormatterAlgorithm = _
            "System.Security.Cryptography.DSASignatureFormatter"

        Dim asymmetricFormatter As AsymmetricSignatureFormatter
        asymmetricFormatter = signatureDescription.CreateFormatter(dsa)

        WriteLine("Created formatter : " + asymmetricFormatter.ToString())
        Return asymmetricFormatter
    End Function

    ' Create a signature deformatter for DSA decryption.
    Private Function CreateDSADeformatter(ByVal
 dsa As DSA) _
        As AsymmetricSignatureDeformatter

        ' Create a DSA signature deformatter to verify the signature.
        Dim signatureDescription As New
 SignatureDescription
        signatureDescription.DeformatterAlgorithm = _
            "System.Security.Cryptography.DSASignatureDeformatter"

        Dim asymmetricDeformatter As AsymmetricSignatureDeformatter
        asymmetricDeformatter = SignatureDescription.CreateDeformatter(dsa)

        WriteLine("Created deformatter : " + asymmetricDeformatter.ToString())
        Return asymmetricDeformatter
    End Function

    ' Display to the console the properties of the specified
    ' SignatureDescription.
    Private Sub ShowProperties(ByVal
 signatureDescription _
        As SignatureDescription)

        ' Retrieve the class path for the specified SignatureDescription.
        Dim classDescription As String
 = signatureDescription.ToString()

        Dim deformatterAlgorithm As String
 
        deformatterAlgorithm = signatureDescription.DeformatterAlgorithm
        Dim formatterAlgorithm As String
 
        formatterAlgorithm = signatureDescription.FormatterAlgorithm
        Dim digestAlgorithm As String
 
        digestAlgorithm = signatureDescription.DigestAlgorithm
        Dim keyAlgorithm As String
 
        keyAlgorithm = signatureDescription.KeyAlgorithm

        WriteLine(vbCrLf + "** " + classDescription
 + " **")
        WriteLine("DeformatterAlgorithm : " + deformatterAlgorithm)
        WriteLine("FormatterAlgorithm : " + formatterAlgorithm)
        WriteLine("DigestAlgorithm : " + digestAlgorithm)
        WriteLine("KeyAlgorithm : " + keyAlgorithm)
    End Sub

    ' Write the 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 = "SignatureDescription"
        Me.Panel2.ResumeLayout(False)
        Me.Panel1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region
End Class
'
' This sample produces the following output:
'
'
' ** System.Security.Cryptography.SignatureDescription **
' DeformatterAlgorithm : System.Security.Cryptography.
' RSAPKCS1SignatureDeformatter
' FormatterAlgorithm : System.Security.Cryptography.RSAPKCS1SignatureFormatter
' DigestAlgorithm : System.Security.Cryptography.SHA1CryptoServiceProvider
' KeyAlgorithm : System.Security.Cryptography.RSACryptoServiceProvider
' 
' ** System.Security.Cryptography.SignatureDescription **
' DeformatterAlgorithm : System.Security.Cryptography.DSASignatureDeformatter
' FormatterAlgorithm : System.Security.Cryptography.DSASignatureFormatter
' DigestAlgorithm : System.Security.Cryptography.SHA1CryptoServiceProvider
' KeyAlgorithm : System.Security.Cryptography.DSACryptoServiceProvider
' Hash algorithm for the DigestAlgorithm property: System.Security.
' Cryptography.
' SHA1CryptoServiceProvider
' Created formatter : System.Security.Cryptography.DSASignatureFormatter
' Created deformatter : System.Security.Cryptography.DSASignatureDeformatter
' This sample completed successfully; press Exit to continue.
using System;
using System.Security;
using System.Security.Cryptography;

class SignatureDescriptionImpl
{
    [STAThread]
    static void Main(string[]
 args)
    {
        // Create a digital signature based on RSA encryption.
        SignatureDescription rsaSignature = CreateRSAPKCS1Signature();
        ShowProperties(rsaSignature);

        // Create a digital signature based on DSA encryption.
        SignatureDescription dsaSignature = CreateDSASignature();
        ShowProperties(dsaSignature);

        // Create a HashAlgorithm using the digest algorithm of the
 signature.
        HashAlgorithm hashAlgorithm = dsaSignature.CreateDigest();
        Console.WriteLine("\nHash algorithm for the DigestAlgorithm
 property:"
            + " " + hashAlgorithm.ToString());

        // Create an AsymmetricSignatureFormatter instance using the
 DSA key.
        DSA dsa = DSA.Create();
        AsymmetricSignatureFormatter asymmetricFormatter =
            CreateDSAFormatter(dsa);
        
        // Create an AsymmetricSignatureDeformatter instance using the
        // DSA key.
        AsymmetricSignatureDeformatter asymmetricDeformatter =
            CreateDSADeformatter(dsa);

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

    // Create a SignatureDescription for RSA encryption.
    private static SignatureDescription CreateRSAPKCS1Signature()
    {
        SignatureDescription signatureDescription = 
            new SignatureDescription();

        // Set the key algorithm property for RSA encryption.
        signatureDescription.KeyAlgorithm =
            "System.Security.Cryptography.RSACryptoServiceProvider";

        // Set the digest algorithm for RSA encryption using the
        // SHA1 provider.
        signatureDescription.DigestAlgorithm =
            "System.Security.Cryptography.SHA1CryptoServiceProvider";

        // Set the formatter algorithm with the RSAPKCS1 formatter.
        signatureDescription.FormatterAlgorithm =
            "System.Security.Cryptography.RSAPKCS1SignatureFormatter";

        // Set the formatter algorithm with the RSAPKCS1 deformatter.
        signatureDescription.DeformatterAlgorithm =
            "System.Security.Cryptography.RSAPKCS1SignatureDeformatter";

        return signatureDescription;
    }

    // Create a SignatureDescription using a constructed SecurityElement
 for 
    // DSA encryption.
    private static SignatureDescription CreateDSASignature()
    {
        SecurityElement securityElement = new SecurityElement("DSASignature");

        // Create new security elements for the four algorithms.
        securityElement.AddChild(new SecurityElement(
            "Key",
            "System.Security.Cryptography.DSACryptoServiceProvider"));
        securityElement.AddChild(new SecurityElement(
            "Digest",
            "System.Security.Cryptography.SHA1CryptoServiceProvider"));
 
        securityElement.AddChild(new SecurityElement(
            "Formatter",
            "System.Security.Cryptography.DSASignatureFormatter"));
        securityElement.AddChild(new SecurityElement(
            "Deformatter",
            "System.Security.Cryptography.DSASignatureDeformatter"));

        SignatureDescription signatureDescription = 
            new SignatureDescription(securityElement);

        return signatureDescription;
    }

    // Create a signature formatter for DSA encryption.
    private static AsymmetricSignatureFormatter
 CreateDSAFormatter(DSA dsa)
    {
        // Create a DSA signature formatter for encryption.
        SignatureDescription signatureDescription = 
            new SignatureDescription();
        signatureDescription.FormatterAlgorithm =
            "System.Security.Cryptography.DSASignatureFormatter";

        AsymmetricSignatureFormatter asymmetricFormatter =
            signatureDescription.CreateFormatter(dsa);

        Console.WriteLine("\nCreated formatter : " + 
            asymmetricFormatter.ToString());
        return asymmetricFormatter;
    }

    // Create a signature deformatter for DSA decryption.
    private static AsymmetricSignatureDeformatter
 CreateDSADeformatter(
        DSA dsa)
    {
        // Create a DSA signature deformatter to verify the signature.
        SignatureDescription signatureDescription = 
            new SignatureDescription();
        signatureDescription.DeformatterAlgorithm =
            "System.Security.Cryptography.DSASignatureDeformatter";

        AsymmetricSignatureDeformatter asymmetricDeformatter =
            signatureDescription.CreateDeformatter(dsa);

        Console.WriteLine("\nCreated deformatter : " + 
            asymmetricDeformatter.ToString());
        return asymmetricDeformatter;
    }

    // Display to the console the properties of the specified
    // SignatureDescription.
    private static void
 ShowProperties(
        SignatureDescription signatureDescription)
    {
        // Retrieve the class path for the specified SignatureDescription.
        string classDescription = signatureDescription.ToString();

        string deformatterAlgorithm = 
            signatureDescription.DeformatterAlgorithm;
        string formatterAlgorithm = signatureDescription.FormatterAlgorithm;
        string digestAlgorithm = signatureDescription.DigestAlgorithm;
        string keyAlgorithm = signatureDescription.KeyAlgorithm;

        Console.WriteLine("\n** " + classDescription + " **");
        Console.WriteLine("DeformatterAlgorithm : " + deformatterAlgorithm);
        Console.WriteLine("FormatterAlgorithm : " + formatterAlgorithm);
        Console.WriteLine("DigestAlgorithm : " + digestAlgorithm);
        Console.WriteLine("KeyAlgorithm : " + keyAlgorithm);
    }
}
//
// This sample produces the following output:
// 
// ** System.Security.Cryptography.SignatureDescription **
// DeformatterAlgorithm : System.Security.Cryptography.
// RSAPKCS1SignatureDeformatter
// 
// FormatterAlgorithm : System.Security.Cryptography.
// RSAPKCS1SignatureFormatter
// DigestAlgorithm : System.Security.Cryptography.SHA1CryptoServiceProvider
// KeyAlgorithm : System.Security.Cryptography.RSACryptoServiceProvider
// 
// ** System.Security.Cryptography.SignatureDescription **
// DeformatterAlgorithm : System.Security.Cryptography.DSASignatureDeformatter
// FormatterAlgorithm : System.Security.Cryptography.DSASignatureFormatter
// DigestAlgorithm : System.Security.Cryptography.SHA1CryptoServiceProvider
// KeyAlgorithm : System.Security.Cryptography.DSACryptoServiceProvider
// 
// Hash algorithm for the DigestAlgorithm property: 
// System.Security.Cryptography.SH
// A1CryptoServiceProvider
// 
// Created formatter : System.Security.Cryptography.DSASignatureFormatter
// 
// Created deformatter : System.Security.Cryptography.DSASignatureDeformatter
// This sample completed successfully; press Enter to exit.
using namespace System;
using namespace System::Security;
using namespace System::Security::Cryptography;

ref class SignatureDescriptionImpl
{
public:
   [STAThread]
   static void Main()
   {
      // Create a digital signature based on RSA encryption.
      SignatureDescription^ rsaSignature = CreateRSAPKCS1Signature();
      ShowProperties( rsaSignature );
      
      // Create a digital signature based on DSA encryption.
      SignatureDescription^ dsaSignature = CreateDSASignature();
      ShowProperties( dsaSignature );
      
      // Create a HashAlgorithm using the digest algorithm of the signature.
      HashAlgorithm^ hashAlgorithm = dsaSignature->CreateDigest();

      Console::WriteLine( L"\nHash algorithm for the DigestAlgorithm
 property:"
         L" {0}", hashAlgorithm );
      
      // Create an AsymmetricSignatureFormatter instance using the DSA
 key.
      DSA^ dsa = DSA::Create();
      AsymmetricSignatureFormatter^ asymmetricFormatter = CreateDSAFormatter( dsa
 );
      
      // Create an AsymmetricSignatureDeformatter instance using the
      // DSA key.
      AsymmetricSignatureDeformatter^ asymmetricDeformatter =
         CreateDSADeformatter( dsa );
      Console::WriteLine( L"This sample completed successfully; "
         L"press Enter to exit." );
      Console::ReadLine();
   }

private:
   // Create a SignatureDescription for RSA encryption.
   static SignatureDescription^ CreateRSAPKCS1Signature()
   {
      SignatureDescription^ signatureDescription = gcnew SignatureDescription;

      // Set the key algorithm property for RSA encryption.
      signatureDescription->KeyAlgorithm = L"System.Security.Cryptography.RSACryptoServiceProvider";

      // Set the digest algorithm for RSA encryption using the
      // SHA1 provider.
      signatureDescription->DigestAlgorithm = L"System.Security.Cryptography.SHA1CryptoServiceProvider";

      // Set the formatter algorithm with the RSAPKCS1 formatter.
      signatureDescription->FormatterAlgorithm = L"System.Security.Cryptography.RSAPKCS1SignatureFormatter";

      // Set the formatter algorithm with the RSAPKCS1 deformatter.
      signatureDescription->DeformatterAlgorithm = L"System.Security.Cryptography.RSAPKCS1SignatureDeformatter";

      return signatureDescription;
   }

   // Create a SignatureDescription using a constructed SecurityElement
 for
   // DSA encryption.
   static SignatureDescription^ CreateDSASignature()
   {
      SecurityElement^ securityElement = gcnew SecurityElement( L"DSASignature"
 );
      // Create new security elements for the four algorithms.
      securityElement->AddChild( gcnew SecurityElement(
         L"Key",L"System.Security.Cryptography.DSACryptoServiceProvider"
 ) );
      securityElement->AddChild( gcnew SecurityElement(
         L"Digest",L"System.Security.Cryptography.SHA1CryptoServiceProvider"
 ) );
      securityElement->AddChild( gcnew SecurityElement(
         L"Formatter",L"System.Security.Cryptography.DSASignatureFormatter"
 ) );
      securityElement->AddChild( gcnew SecurityElement(
         L"Deformatter",L"System.Security.Cryptography.DSASignatureDeformatter"
 ) );
      SignatureDescription^ signatureDescription =
         gcnew SignatureDescription( securityElement );

      return signatureDescription;
   }

   // Create a signature formatter for DSA encryption.
   static AsymmetricSignatureFormatter^ CreateDSAFormatter( DSA^
 dsa )
   {
      // Create a DSA signature formatter for encryption.
      SignatureDescription^ signatureDescription =
         gcnew SignatureDescription;
      signatureDescription->FormatterAlgorithm =
         L"System.Security.Cryptography.DSASignatureFormatter";
      AsymmetricSignatureFormatter^ asymmetricFormatter =
         signatureDescription->CreateFormatter( dsa );

      Console::WriteLine( L"\nCreated formatter : {0}",
         asymmetricFormatter );
      return asymmetricFormatter;
   }

   // Create a signature deformatter for DSA decryption.
   static AsymmetricSignatureDeformatter^ CreateDSADeformatter(
 DSA^ dsa )
   {
      // Create a DSA signature deformatter to verify the signature.
      SignatureDescription^ signatureDescription =
         gcnew SignatureDescription;
      signatureDescription->DeformatterAlgorithm =
         L"System.Security.Cryptography.DSASignatureDeformatter";
      AsymmetricSignatureDeformatter^ asymmetricDeformatter =
         signatureDescription->CreateDeformatter( dsa );

      Console::WriteLine( L"\nCreated deformatter : {0}",
         asymmetricDeformatter );
      return asymmetricDeformatter;
   }

   // Display to the console the properties of the specified
   // SignatureDescription.
   static void ShowProperties( SignatureDescription^
 signatureDescription )
   {
      // Retrieve the class path for the specified SignatureDescription.
      String^ classDescription = signatureDescription->ToString();

      String^ deformatterAlgorithm = signatureDescription->DeformatterAlgorithm;
      String^ formatterAlgorithm = signatureDescription->FormatterAlgorithm;
      String^ digestAlgorithm = signatureDescription->DigestAlgorithm;
      String^ keyAlgorithm = signatureDescription->KeyAlgorithm;
      Console::WriteLine( L"\n** {0} **", classDescription );
      Console::WriteLine( L"DeformatterAlgorithm : {0}", deformatterAlgorithm
 );
      Console::WriteLine( L"FormatterAlgorithm : {0}", formatterAlgorithm
 );
      Console::WriteLine( L"DigestAlgorithm : {0}", digestAlgorithm );
      Console::WriteLine( L"KeyAlgorithm : {0}", keyAlgorithm );
   }
};

int main()
{
   SignatureDescriptionImpl::Main();
}

//
// This sample produces the following output:
//
// ** System.Security.Cryptography.SignatureDescription **
// DeformatterAlgorithm : System.Security.Cryptography.
// RSAPKCS1SignatureDeformatter
//
// FormatterAlgorithm : System.Security.Cryptography.
// RSAPKCS1SignatureFormatter
// DigestAlgorithm : System.Security.Cryptography.SHA1CryptoServiceProvider
// KeyAlgorithm : System.Security.Cryptography.RSACryptoServiceProvider
//
// ** System.Security.Cryptography.SignatureDescription **
// DeformatterAlgorithm : System.Security.Cryptography.DSASignatureDeformatter
// FormatterAlgorithm : System.Security.Cryptography.DSASignatureFormatter
// DigestAlgorithm : System.Security.Cryptography.SHA1CryptoServiceProvider
// KeyAlgorithm : System.Security.Cryptography.DSACryptoServiceProvider
//
// Hash algorithm for the DigestAlgorithm property:
// System.Security.Cryptography.SH
// A1CryptoServiceProvider
//
// Created formatter : System.Security.Cryptography.DSASignatureFormatter
//
// Created deformatter : System.Security.Cryptography.DSASignatureDeformatter
// This sample completed successfully; press Enter to exit.
import System.*;
import System.Security.*;
import System.Security.Cryptography.*;

class SignatureDescriptionImpl
{
    /** @attribute STAThread()
     */
    public static void main(String[]
 args)
    {
        // Create a digital signature based on RSA encryption.
        SignatureDescription rsaSignature = CreateRSAPKCS1Signature();
        ShowProperties(rsaSignature);
        // Create a digital signature based on DSA encryption.
        SignatureDescription dsaSignature = CreateDSASignature();
        ShowProperties(dsaSignature);
        // Create a HashAlgorithm using the digest algorithm of the
 signature.
        HashAlgorithm hashAlgorithm = dsaSignature.CreateDigest();

        Console.WriteLine("\nHash algorithm for the DigestAlgorithm
 property:" 
            + " " + hashAlgorithm.ToString());
        // Create an AsymmetricSignatureFormatter instance using the
 DSA key.
        DSA dsa = DSA.Create();
        AsymmetricSignatureFormatter asymmetricFormatter 
            = CreateDSAFormatter(dsa);
        // Create an AsymmetricSignatureDeformatter instance using the
        // DSA key.
        AsymmetricSignatureDeformatter asymmetricDeformatter 
            = CreateDSADeformatter(dsa);

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

    // Create a SignatureDescription for RSA encryption.
    private static SignatureDescription CreateRSAPKCS1Signature()
    {
        SignatureDescription signatureDescription = new SignatureDescription();

        // Set the key algorithm property for RSA encryption.
        signatureDescription.set_KeyAlgorithm(
            "System.Security.Cryptography.RSACryptoServiceProvider");

        // Set the digest algorithm for RSA encryption using the
        // SHA1 provider.
        signatureDescription.set_DigestAlgorithm(
            "System.Security.Cryptography.SHA1CryptoServiceProvider");

        // Set the formatter algorithm with the RSAPKCS1 formatter.
        signatureDescription.set_FormatterAlgorithm(
            "System.Security.Cryptography.RSAPKCS1SignatureFormatter");

        // Set the formatter algorithm with the RSAPKCS1 deformatter.
        signatureDescription.set_DeformatterAlgorithm
            ("System.Security.Cryptography.RSAPKCS1SignatureDeformatter");

        return signatureDescription;
    } //CreateRSAPKCS1Signature

    // Create a SignatureDescription using a constructed SecurityElement
 for 
    // DSA encryption.
    private static SignatureDescription CreateDSASignature()
    {
        SecurityElement securityElement = new SecurityElement("DSASignature");
        // Create new security elements for the four algorithms.
        securityElement.AddChild(new SecurityElement("Key",
 
            "System.Security.Cryptography.DSACryptoServiceProvider"));
        securityElement.AddChild(new SecurityElement("Digest",
 
            "System.Security.Cryptography.SHA1CryptoServiceProvider"));
        securityElement.AddChild(new SecurityElement("Formatter",
 
            "System.Security.Cryptography.DSASignatureFormatter"));
        securityElement.AddChild(new SecurityElement("Deformatter",
 
            "System.Security.Cryptography.DSASignatureDeformatter"));

        SignatureDescription signatureDescription 
            = new SignatureDescription(securityElement);
        return signatureDescription;
    } //CreateDSASignature

    // Create a signature formatter for DSA encryption.
    private static AsymmetricSignatureFormatter
 CreateDSAFormatter(DSA dsa)
    {
        // Create a DSA signature formatter for encryption.
        SignatureDescription signatureDescription = new SignatureDescription();
        signatureDescription.set_FormatterAlgorithm(
            "System.Security.Cryptography.DSASignatureFormatter");

        AsymmetricSignatureFormatter asymmetricFormatter 
            = signatureDescription.CreateFormatter(dsa);
        Console.WriteLine("\nCreated formatter : " 
            + asymmetricFormatter.ToString());
        return asymmetricFormatter;
    } //CreateDSAFormatter

    // Create a signature deformatter for DSA decryption.
    private static AsymmetricSignatureDeformatter
 CreateDSADeformatter(DSA dsa)
    {
        // Create a DSA signature deformatter to verify the signature.
        SignatureDescription signatureDescription = new SignatureDescription();
        signatureDescription.set_DeformatterAlgorithm(
            "System.Security.Cryptography.DSASignatureDeformatter");
        AsymmetricSignatureDeformatter asymmetricDeformatter 
            = signatureDescription.CreateDeformatter(dsa);

        Console.WriteLine("\nCreated deformatter : " 
            + asymmetricDeformatter.ToString());
        return asymmetricDeformatter;
    } //CreateDSADeformatter

    // Display to the console the properties of the specified
    // SignatureDescription.
    private static void
 ShowProperties(SignatureDescription signatureDescription)
    {
        // Retrieve the class path for the specified SignatureDescription.
        String classDescription = signatureDescription.ToString();

        String deformatterAlgorithm = signatureDescription.
            get_DeformatterAlgorithm();
        String formatterAlgorithm = signatureDescription.
            get_FormatterAlgorithm();
        String digestAlgorithm = signatureDescription.get_DigestAlgorithm();
        String keyAlgorithm = signatureDescription.get_KeyAlgorithm();

        Console.WriteLine("\n** " + classDescription + " **");
        Console.WriteLine("DeformatterAlgorithm : " + deformatterAlgorithm);
        Console.WriteLine("FormatterAlgorithm : " + formatterAlgorithm);
        Console.WriteLine("DigestAlgorithm : " + digestAlgorithm);
        Console.WriteLine("KeyAlgorithm : " + keyAlgorithm);
    } //ShowProperties
} //SignatureDescriptionImpl
//
// This sample produces the following output:
// 
// ** System.Security.Cryptography.SignatureDescription **
// DeformatterAlgorithm : System.Security.Cryptography.
// RSAPKCS1SignatureDeformatter
// 
// FormatterAlgorithm : System.Security.Cryptography.
// RSAPKCS1SignatureFormatter
// DigestAlgorithm : System.Security.Cryptography.SHA1CryptoServiceProvider
// KeyAlgorithm : System.Security.Cryptography.RSACryptoServiceProvider
// 
// ** System.Security.Cryptography.SignatureDescription **
// DeformatterAlgorithm : System.Security.Cryptography.DSASignatureDeformatter
// FormatterAlgorithm : System.Security.Cryptography.DSASignatureFormatter
// DigestAlgorithm : System.Security.Cryptography.SHA1CryptoServiceProvider
// KeyAlgorithm : System.Security.Cryptography.DSACryptoServiceProvider
// 
// Hash algorithm for the DigestAlgorithm property: 
// System.Security.Cryptography.SH
// A1CryptoServiceProvider
// 
// Created formatter : System.Security.Cryptography.DSASignatureFormatter
// 
// Created deformatter : System.Security.Cryptography.DSASignatureDeformatter
// This sample completed successfully; press Enter to exit.
継承階層継承階層
System.Object
  System.Security.Cryptography.SignatureDescription
スレッド セーフスレッド セーフ
この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバ場合は、スレッド セーフであるとは限りません。
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照
関連項目
SignatureDescription メンバ
System.Security.Cryptography 名前空間
その他の技術情報
暗号サービス

SignatureDescription コンストラクタ ()

SignatureDescription クラス新しインスタンス初期化します。

名前空間: System.Security.Cryptography
アセンブリ: mscorlib (mscorlib.dll 内)
構文構文

Dim instance As New SignatureDescription
public SignatureDescription ()
public:
SignatureDescription ()
public SignatureDescription ()
public function SignatureDescription ()
使用例使用例

既定SignatureDescription コンストラクタ呼び出す方法次のコード例示します。このコード例は、SignatureDescription クラストピック取り上げているコード例一部分です。

Dim signatureDescription As New
 SignatureDescription
SignatureDescription signatureDescription = 
    new SignatureDescription();
SignatureDescription^ signatureDescription = gcnew SignatureDescription;
SignatureDescription signatureDescription = new SignatureDescription();
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照
関連項目
SignatureDescription クラス
SignatureDescription メンバ
System.Security.Cryptography 名前空間
その他の技術情報
暗号サービス

SignatureDescription コンストラクタ

SignatureDescription クラス新しインスタンス初期化します。
オーバーロードの一覧オーバーロードの一覧

名前 説明
SignatureDescription () SignatureDescription クラス新しインスタンス初期化します。

.NET Compact Framework によってサポートされています。

SignatureDescription (SecurityElement) 指定した SecurityElement から SignatureDescription クラス新しインスタンス初期化します。
参照参照

関連項目

SignatureDescription クラス
SignatureDescription メンバ
System.Security.Cryptography 名前空間

その他の技術情報

暗号サービス

SignatureDescription コンストラクタ (SecurityElement)

指定した SecurityElement から SignatureDescription クラス新しインスタンス初期化します。

名前空間: System.Security.Cryptography
アセンブリ: mscorlib (mscorlib.dll 内)
構文構文

Public Sub New ( _
    el As SecurityElement _
)
Dim el As SecurityElement

Dim instance As New SignatureDescription(el)
public SignatureDescription (
    SecurityElement el
)
public:
SignatureDescription (
    SecurityElement^ el
)
public SignatureDescription (
    SecurityElement el
)
public function SignatureDescription (
    el : SecurityElement
)

パラメータ

el

署名説明対すアルゴリズム取得元の SecurityElement。

例外例外
例外種類条件

CryptographicException

el パラメータnull 参照 (Visual Basic では Nothing) です。

使用例使用例

新しSignatureDescription クラス初期化する方法次のコード例示します

4 つアルゴリズムを含む SecurityElement。このコード例は、SignatureDescription クラストピック取り上げているコード例一部分です。

Dim securityElement As New
 SecurityElement("DSASignature")

' Create new security elements for the four algorithms.
securityElement.AddChild(new SecurityElement( _
    "Key", _
    "System.Security.Cryptography.DSACryptoServiceProvider"))
securityElement.AddChild(New SecurityElement( _
    "Digest", _
    "System.Security.Cryptography.SHA1CryptoServiceProvider"))
securityElement.AddChild(new SecurityElement( _
    "Formatter", _
    "System.Security.Cryptography.DSASignatureFormatter"))
securityElement.AddChild(new SecurityElement( _
    "Deformatter", _
    "System.Security.Cryptography.DSASignatureDeformatter"))

Dim signatureDescription As New
 SignatureDescription(securityElement)
SecurityElement securityElement = new SecurityElement("DSASignature");

// Create new security elements for the four algorithms.
securityElement.AddChild(new SecurityElement(
    "Key",
    "System.Security.Cryptography.DSACryptoServiceProvider"));
securityElement.AddChild(new SecurityElement(
    "Digest",
    "System.Security.Cryptography.SHA1CryptoServiceProvider")); 
securityElement.AddChild(new SecurityElement(
    "Formatter",
    "System.Security.Cryptography.DSASignatureFormatter"));
securityElement.AddChild(new SecurityElement(
    "Deformatter",
    "System.Security.Cryptography.DSASignatureDeformatter"));

SignatureDescription signatureDescription = 
    new SignatureDescription(securityElement);
SecurityElement^ securityElement = gcnew SecurityElement( L"DSASignature"
 );
// Create new security elements for the four algorithms.
securityElement->AddChild( gcnew SecurityElement(
   L"Key",L"System.Security.Cryptography.DSACryptoServiceProvider"
 ) );
securityElement->AddChild( gcnew SecurityElement(
   L"Digest",L"System.Security.Cryptography.SHA1CryptoServiceProvider"
 ) );
securityElement->AddChild( gcnew SecurityElement(
   L"Formatter",L"System.Security.Cryptography.DSASignatureFormatter"
 ) );
securityElement->AddChild( gcnew SecurityElement(
   L"Deformatter",L"System.Security.Cryptography.DSASignatureDeformatter"
 ) );
SignatureDescription^ signatureDescription =
   gcnew SignatureDescription( securityElement );
SecurityElement securityElement = new SecurityElement("DSASignature");
// Create new security elements for the four algorithms.
securityElement.AddChild(new SecurityElement("Key",
 
    "System.Security.Cryptography.DSACryptoServiceProvider"));
securityElement.AddChild(new SecurityElement("Digest",
 
    "System.Security.Cryptography.SHA1CryptoServiceProvider"));
securityElement.AddChild(new SecurityElement("Formatter",
 
    "System.Security.Cryptography.DSASignatureFormatter"));
securityElement.AddChild(new SecurityElement("Deformatter",
 
    "System.Security.Cryptography.DSASignatureDeformatter"));

SignatureDescription signatureDescription 
    = new SignatureDescription(securityElement);
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照
関連項目
SignatureDescription クラス
SignatureDescription メンバ
System.Security.Cryptography 名前空間
その他の技術情報
暗号サービス

SignatureDescription プロパティ


パブリック プロパティパブリック プロパティ

  名前 説明
パブリック プロパティ KeyAlgorithm 署名説明対すキー アルゴリズム取得または設定します
参照参照

関連項目

SignatureDescription クラス
System.Security.Cryptography 名前空間

その他の技術情報

暗号サービス

SignatureDescription メソッド


パブリック メソッドパブリック メソッド

プロテクト メソッドプロテクト メソッド
参照参照

関連項目

SignatureDescription クラス
System.Security.Cryptography 名前空間

その他の技術情報

暗号サービス

SignatureDescription メンバ

デジタル署名プロパティに関する情報格納します

SignatureDescription データ型公開されるメンバを以下の表に示します


パブリック コンストラクタパブリック コンストラクタ
  名前 説明
パブリック メソッド SignatureDescription オーバーロードされます。 SignatureDescription クラス新しインスタンス初期化します。
パブリック プロパティパブリック プロパティ
  名前 説明
パブリック プロパティ KeyAlgorithm 署名説明対すキー アルゴリズム取得または設定します
パブリック メソッドパブリック メソッド
プロテクト メソッドプロテクト メソッド
参照参照

関連項目

SignatureDescription クラス
System.Security.Cryptography 名前空間

その他の技術情報

暗号サービス



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