DSASignatureDeformatter Classe

Définition

Espace de noms:

System.Security.Cryptography

Assembly:

System.Security.Cryptography.dll

Source:

DSASignatureDeformatter.cs

Vérifie une signature Digital Signature Algorithm (DSA) PKCS#1 v1.5.

public ref class DSASignatureDeformatter : System::Security::Cryptography::AsymmetricSignatureDeformatter

public class DSASignatureDeformatter : System.Security.Cryptography.AsymmetricSignatureDeformatter

type DSASignatureDeformatter = class
    inherit AsymmetricSignatureDeformatter

Public Class DSASignatureDeformatter
Inherits AsymmetricSignatureDeformatter

Héritage

Object

AsymmetricSignatureDeformatter

DSASignatureDeformatter

Exemples

#using <System.dll>

using namespace System;
using namespace System::Security::Cryptography;
int main()
{
   try
   {
      
      //Create a new instance of DSA.
      DSA^ DSA = DSA::Create();
      
      //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 
      //DSA instance 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 
      //DSA instance 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 );
   }

}

using System;
using System.Security.Cryptography;

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

            //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 
            //DSA instance 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 
            //DSA instance 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);
        }
    }
}

Imports System.Security.Cryptography

 _

Class DSASample


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

            '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 
            'DSA instance 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 
            'DSA instance 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

Remarques

Important

Les créateurs de l’algorithme DSA ont retiré leur prise en charge pour celui-ci. Envisagez d’utiliser la RSA classe ou la ECDsa classe à la place de la DSA classe . Utilisez DSA uniquement pour la compatibilité avec les applications et les données héritées.

Constructeurs

DSASignatureDeformatter()	Initialise une nouvelle instance de la classe DSASignatureDeformatter.
DSASignatureDeformatter(AsymmetricAlgorithm)	Initialise une nouvelle instance de la classe DSASignatureDeformatter avec la clé spécifiée.

Méthodes

Equals(Object)	Détermine si l'objet spécifié est égal à l'objet actuel. (Hérité de Object)
GetHashCode()	Fait office de fonction de hachage par défaut. (Hérité de Object)
GetType()	Obtient le Type de l'instance actuelle. (Hérité de Object)
MemberwiseClone()	Crée une copie superficielle du Object actuel. (Hérité de Object)
SetHashAlgorithm(String)	Spécifie l'algorithme de hachage pour le déformateur de signatures Digital Signature Algorithm (DSA).
SetKey(AsymmetricAlgorithm)	Spécifie la clé à utiliser pour le déformateur de signatures Digital Signature Algorithm (DSA).
ToString()	Retourne une chaîne qui représente l'objet actuel. (Hérité de Object)
VerifySignature(Byte[], Byte[])	Vérifie la signature Digital Signature Algorithm (DSA) sur les données.
VerifySignature(HashAlgorithm, Byte[])	Vérifie la signature de la valeur de hachage spécifiée. (Hérité de AsymmetricSignatureDeformatter)

Voir aussi

• services de chiffrement