DSASignatureDeformatter.SetHashAlgorithm メソッド

.NET Framework クラス ライブラリ リファレンス

DSASignatureDeformatter.SetHashAlgorithm メソッド

デジタル署名アルゴリズム (DSA) 署名逆フォーマッタのハッシュ アルゴリズムを指定します。

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

Visual Basic (宣言)

Public Overrides Sub SetHashAlgorithm
 ( _
    strName As String _
)

Visual Basic (使用法)

Dim instance As DSASignatureDeformatter
Dim strName As String

instance.SetHashAlgorithm(strName)

C#

public override void SetHashAlgorithm (
    string strName
)

C++

public:
virtual void SetHashAlgorithm (
    String^ strName
) override

J#

public void SetHashAlgorithm (
    String strName
)

JScript

public override function SetHashAlgorithm (
    strName : String
)

パラメータ

strName

署名逆フォーマッタで使用するハッシュ アルゴリズムの名前。

例外

例外の種類	条件
CryptographicUnexpectedOperationException	strName パラメータが、SHA1 ハッシュ アルゴリズムに割り当てられません。

解説

実装時の注意 このメソッドは使用されません。DSA アルゴリズムは SHA1 ハッシュ アルゴリズムを必要とします。

使用例

Visual Basic

Imports System
Imports System.Security.Cryptography

 _

Class DSASample


    Shared Sub Main()
        Try
            'Create a new instance of DSACryptoServiceProvider.
            Dim DSA As New
 DSACryptoServiceProvider()

            'The hash to sign.
            Dim Hash As Byte()
 = {59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, 93, 25, 41, 100, 197, 213,
 134, 130, 135}

            'Create an DSASignatureFormatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the key information.
            Dim DSAFormatter As New
 DSASignatureFormatter(DSA)

            'Set the hash algorithm to SHA1.
            DSAFormatter.SetHashAlgorithm("SHA1")

            'Create a signature for HashValue and return it.
            Dim SignedHash As Byte()
 = DSAFormatter.CreateSignature(Hash)

            'Create an DSASignatureDeformatter object and pass it the
 
            'DSACryptoServiceProvider to transfer the key information.
            Dim DSADeformatter As New
 DSASignatureDeformatter(DSA)

            'Verify the hash and display the results to the console.
            If DSADeformatter.VerifySignature(Hash, SignedHash)
 Then
                Console.WriteLine("The signature was verified.")
            Else
                Console.WriteLine("The signature was not verified.")
            End If

        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub
End Class

C#

using System;
using System.Security.Cryptography;

class DSASample
{
        
    static void Main()
    {
        try
        {
            //Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider DSA = new DSACryptoServiceProvider();

            //The hash to sign.
            byte[] Hash = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100,197
,213,134,130,135};

            //Create an DSASignatureFormatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the key information.
            DSASignatureFormatter DSAFormatter = new DSASignatureFormatter(DSA);

            //Set the hash algorithm to SHA1.
            DSAFormatter.SetHashAlgorithm("SHA1");

            //Create a signature for HashValue and return it.
            byte[] SignedHash = DSAFormatter.CreateSignature(Hash);

            //Create an DSASignatureDeformatter object and pass it the
 
            //DSACryptoServiceProvider to transfer the key information.
            DSASignatureDeformatter DSADeformatter = new DSASignatureDeformatter(DSA);

            //Verify the hash and display the results to the console.
            if(DSADeformatter.VerifySignature(Hash, SignedHash))
            {
                Console.WriteLine("The signature was verified.");
            }
            else
            {
                Console.WriteLine("The signature was not verified.");
            }

        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);
        }
    }

}

C++

#using <System.dll>

using namespace System;
using namespace System::Security::Cryptography;
int main()
{
   try
   {
      
      //Create a new instance of DSACryptoServiceProvider.
      DSACryptoServiceProvider^ DSA = gcnew DSACryptoServiceProvider;
      
      //The hash to sign.
      array<Byte>^Hash = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100
,197,213,134,130,135};
      
      //Create an DSASignatureFormatter object and pass it the 
      //DSACryptoServiceProvider to transfer the key information.
      DSASignatureFormatter^ DSAFormatter = gcnew DSASignatureFormatter( DSA );
      
      //Set the hash algorithm to SHA1.
      DSAFormatter->SetHashAlgorithm( "SHA1" );
      
      //Create a signature for HashValue and return it.
      array<Byte>^SignedHash = DSAFormatter->CreateSignature( Hash );
      
      //Create an DSASignatureDeformatter object and pass it the 
      //DSACryptoServiceProvider to transfer the key information.
      DSASignatureDeformatter^ DSADeformatter = gcnew DSASignatureDeformatter( DSA
 );
      
      //Verify the hash and display the results to the console.
      if ( DSADeformatter->VerifySignature( Hash, SignedHash
 ) )
      {
         Console::WriteLine( "The signature was verified." );
      }
      else
      {
         Console::WriteLine( "The signature was not verified." );
      }
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

J#

import System.*;
import System.Security.Cryptography.*;

class DSASample
{
    public static void main(String[]
 args)
    {
        try {
            // Create a new instance of DSACryptoServiceProvider.
            DSACryptoServiceProvider dsa = new DSACryptoServiceProvider();

            // The hash to sign.
            ubyte hash[] = {59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, 
                93, 25, 41, 100, 197, 213, 134, 130, 135};

            // Create an DSASignatureFormatter object and pass it the
 
            // DSACryptoServiceProvider to transfer the key information.
            DSASignatureFormatter dsaFormatter = new DSASignatureFormatter(dsa);

            // Set the hash algorithm to SHA1.
            dsaFormatter.SetHashAlgorithm("SHA1");

            // Create a signature for HashValue and return it.
            ubyte signedHash[] = dsaFormatter.CreateSignature(hash);

            // Create an DSASignatureDeformatter object and pass it
 the 
            // DSACryptoServiceProvider to transfer the key information.
            DSASignatureDeformatter dsaDeformatter = 
                new DSASignatureDeformatter(dsa);

            // Verify the hash and display the results to the console.
            if (dsaDeformatter.VerifySignature(hash, signedHash))
 {
                Console.WriteLine("The signature was verified.");
            }
            else {
                Console.WriteLine("The signature was not verified.");
            }
        }
        catch (CryptographicException e) {
            Console.WriteLine(e.get_Message());
        }
    } //main 
} //DSASample

プラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0

参照

関連項目
DSASignatureDeformatter クラス
DSASignatureDeformatter メンバ
System.Security.Cryptography 名前空間
その他の技術情報
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