RSAPKCS1SignatureDeformatter クラス

RSA PKCS #1 Version 1.5 の署名を検証します。

この型のすべてのメンバの一覧については、RSAPKCS1SignatureDeformatter メンバ を参照してください。

System.Object
   System.Security.Cryptography.AsymmetricSignatureDeformatter
      System.Security.Cryptography.RSAPKCS1SignatureDeformatter

Public Class RSAPKCS1SignatureDeformatter
   Inherits AsymmetricSignatureDeformatter
[C#]
public class RSAPKCS1SignatureDeformatter :
   AsymmetricSignatureDeformatter
[C++]
public __gc class RSAPKCS1SignatureDeformatter : public
   AsymmetricSignatureDeformatter
[JScript]
public class RSAPKCS1SignatureDeformatter extends
   AsymmetricSignatureDeformatter

スレッドセーフ

この型の public static (Visual Basicでは Shared) のすべてのメンバは、マルチスレッド操作で安全に使用できます。インスタンスのメンバの場合は、スレッドセーフであるとは限りません。

解説

このクラスは、 RSA アルゴリズムを使用して作成されたデジタル署名を検証するために使用されます。

RSA アルゴリズムを使用してデジタル署名を作成するには、 RSAPKCS1SignatureFormatter を使用します。

使用例

 
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

[C#] 
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);
        }
    }

}

[C++] 
#using <mscorlib.dll>
#using <System.dll>

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

int 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(S"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(S"SHA1");

        //Verify the hash and display the results to the console.
        if (RSADeformatter->VerifySignature(Hash, SignedHash)) {
            Console::WriteLine(S"The signature was verified.");
        } else {
            Console::WriteLine(S"The signature was not verified.");
        }
    } catch (CryptographicException* e) {
        Console::WriteLine(e->Message);
    }
}

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタ ボタン をクリックします。

必要条件

名前空間: System.Security.Cryptography

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ

アセンブリ: Mscorlib (Mscorlib.dll 内)

参照

RSAPKCS1SignatureDeformatter メンバ | System.Security.Cryptography 名前空間 | 暗号サービス