RSAPKCS1SignatureDeformatter コンストラクタ (AsymmetricAlgorithm)

指定したキーを使用して、RSAPKCS1SignatureDeformatter クラスの新しいインスタンスを初期化します。

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

構文

'宣言
Public Sub New ( _
    key As AsymmetricAlgorithm _
)
'使用
Dim key As AsymmetricAlgorithm

Dim instance As New RSAPKCS1SignatureDeformatter(key)

public RSAPKCS1SignatureDeformatter (
    AsymmetricAlgorithm key
)

public:
RSAPKCS1SignatureDeformatter (
    AsymmetricAlgorithm^ key
)

public RSAPKCS1SignatureDeformatter (
    AsymmetricAlgorithm key
)

public function RSAPKCS1SignatureDeformatter (
    key : AsymmetricAlgorithm
)

適用できません。

パラメータ

• key
  公開キーを保持している RSA のインスタンス。

例外

解説

VerifySignature を呼び出す前に、SetHashAlgorithm を使用して、ハッシュ アルゴリズムを設定します。

使用例

RSAPKCS1SignatureFormatter クラスを使用してデジタル署名を作成した後、RSAPKCS1SignatureDeformatter クラスを使用してその署名を検証する方法を次のコード例に示します。

Imports System
Imports System.Security.Cryptography

 _

Class RSASample


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

            '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 RSAOPKCS1SignatureFormatter object and pass it the 
            'RSACryptoServiceProvider to transfer the key information.
            Dim RSAFormatter As New RSAPKCS1SignatureFormatter(RSA)

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

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

            'Create an RSAPKCS1SignatureDeformatter object and pass it the 
            'RSACryptoServiceProvider to transfer the key information.
            Dim RSADeformatter As New RSAPKCS1SignatureDeformatter(RSA)

            RSADeformatter.SetHashAlgorithm("SHA1")

            'Verify the hash and display the results to the console.
            If RSADeformatter.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

using System;
using System.Security.Cryptography;

class RSASample
{
        
    static void Main()
    {
        try
        {
            //Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            //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 RSAOPKCS1SignatureFormatter object and pass it the 
            //RSACryptoServiceProvider to transfer the key information.
            RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA);

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

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

            //Create an RSAPKCS1SignatureDeformatter object and pass it the 
            //RSACryptoServiceProvider to transfer the key information.
            RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(RSA);

            RSADeformatter.SetHashAlgorithm("SHA1");

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

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

}

#using <System.dll>

using namespace System;
using namespace System::Security::Cryptography;
int main()
{
   try
   {
      
      //Create a new instance of RSACryptoServiceProvider.
      RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider;
      
      //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 RSAOPKCS1SignatureFormatter object and pass it the 
      //RSACryptoServiceProvider to transfer the key information.
      RSAPKCS1SignatureFormatter^ RSAFormatter = gcnew RSAPKCS1SignatureFormatter( RSA );
      
      //Set the hash algorithm to SHA1.
      RSAFormatter->SetHashAlgorithm( "SHA1" );
      
      //Create a signature for HashValue and return it.
      array<Byte>^SignedHash = RSAFormatter->CreateSignature( Hash );
      
      //Create an RSAPKCS1SignatureDeformatter object and pass it the 
      //RSACryptoServiceProvider to transfer the key information.
      RSAPKCS1SignatureDeformatter^ RSADeformatter = gcnew RSAPKCS1SignatureDeformatter( RSA );
      RSADeformatter->SetHashAlgorithm( "SHA1" );
      
      //Verify the hash and display the results to the console.
      if ( RSADeformatter->VerifySignature( Hash, SignedHash ) )
      {
         Console::WriteLine( "The signature was verified." );
      }
      else
      {
         Console::WriteLine( "The signature was not verified." );
      }
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

}

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

class RSASample
{
    public static void main(String[] args)
    {
        try {
            // Create a new instance of RSACryptoServiceProvider.
            RSACryptoServiceProvider rsa =  new RSACryptoServiceProvider();
            
            //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 RSAOPKCS1SignatureFormatter object and pass it the 
            // RSACryptoServiceProvider to transfer the key information.
            RSAPKCS1SignatureFormatter rsaFormatter =  
                new RSAPKCS1SignatureFormatter(rsa);
            
            // Set the hash algorithm to SHA1.
            rsaFormatter.SetHashAlgorithm("SHA1");
            
            // Create a signature for HashValue and return it.
            ubyte signedHash[] = rsaFormatter.CreateSignature(hash);
            
            // Create an RSAPKCS1SignatureDeformatter object and pass it the 
            // RSACryptoServiceProvider to transfer the key information.
            RSAPKCS1SignatureDeformatter rsaDeformatter =  
                new RSAPKCS1SignatureDeformatter(rsa);
            
            rsaDeformatter.SetHashAlgorithm("SHA1");
            
            // Verify the hash and display the results to the console.
            if (rsaDeformatter.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
} //RSASample

プラットフォーム

Windows 98,Windows Server 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

Microsoft .NET Framework 3.0 は Windows Vista,Microsoft Windows XP SP2,および Windows Server 2003 SP1 でサポートされています。

バージョン情報

.NET Framework

サポート対象 : 3.0,2.0,1.1,1.0

.NET Compact Framework

サポート対象 : 2.0

参照

関連項目

RSAPKCS1SignatureDeformatter クラス
RSAPKCS1SignatureDeformatter メンバ
System.Security.Cryptography 名前空間

その他の技術情報

暗号サービス