DSASignatureDeformatter.VerifySignature メソッド

署名を検証します。

オーバーロードの一覧

データのデジタル署名アルゴリズム (DSA) 署名を検証します。

[Visual Basic] Overloads Overrides Public Function VerifySignature(Byte(), Byte()) As Boolean

[C#] public override bool VerifySignature(byte[], byte[]);

[C++] public: bool VerifySignature(unsigned char __gc[], unsigned char __gc[]);

[JScript] public override function VerifySignature(Byte[], Byte[]) : Boolean;

AsymmetricSignatureDeformatter から継承されます。

[Visual Basic] Overloads Public Overridable Function VerifySignature(HashAlgorithm, Byte()) As Boolean

[C#] public virtual bool VerifySignature(HashAlgorithm, byte[]);

[C++] public: virtual bool VerifySignature(HashAlgorithm*, unsigned char __gc[]);

[JScript] public function VerifySignature(HashAlgorithm, Byte[]) : Boolean;

使用例

[Visual Basic, C#, C++] メモ   ここでは、VerifySignature のオーバーロード形式のうちの 1 つだけについて、使用例を示します。その他の例については、各オーバーロード形式のトピックを参照してください。

 
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 <mscorlib.dll>
#using <System.dll>

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

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(S"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(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。

参照

DSASignatureDeformatter クラス | DSASignatureDeformatter メンバ | System.Security.Cryptography 名前空間