DSASignatureDeformatter Kelas

Definisi

Ruang nama:

System.Security.Cryptography

Rakitan:

System.Security.Cryptography.dll

Sumber:

DSASignatureDeformatter.cs

Memverifikasi tanda tangan Algoritma Tanda Tangan Digital (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

Warisan

Object

AsymmetricSignatureDeformatter

DSASignatureDeformatter

Contoh

#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

Keterangan

Penting

Pembuat algoritma DSA telah menarik dukungan mereka untuk itu. Pertimbangkan untuk RSA menggunakan kelas atau ECDsa kelas alih-alih DSA kelas . Gunakan DSA hanya untuk kompatibilitas dengan aplikasi dan data warisan.

Konstruktor

DSASignatureDeformatter()	Menginisialisasi instans baru kelas DSASignatureDeformatter.
DSASignatureDeformatter(AsymmetricAlgorithm)	Menginisialisasi instans DSASignatureDeformatter baru kelas dengan kunci yang ditentukan.

Metode

Equals(Object)	Menentukan apakah objek yang ditentukan sama dengan objek saat ini. (Diperoleh dari Object)
GetHashCode()	Berfungsi sebagai fungsi hash default. (Diperoleh dari Object)
GetType()	Mendapatkan instans Type saat ini. (Diperoleh dari Object)
MemberwiseClone()	Membuat salinan dangkal dari yang saat ini Object. (Diperoleh dari Object)
SetHashAlgorithm(String)	Menentukan algoritma hash untuk deformatter tanda tangan Algoritma Tanda Tangan Digital (DSA).
SetKey(AsymmetricAlgorithm)	Menentukan kunci yang akan digunakan untuk deformatter tanda tangan Algoritma Tanda Tangan Digital (DSA).
ToString()	Mengembalikan string yang mewakili objek saat ini. (Diperoleh dari Object)
VerifySignature(Byte[], Byte[])	Memverifikasi tanda tangan Algoritma Tanda Tangan Digital (DSA) pada data.
VerifySignature(HashAlgorithm, Byte[])	Memverifikasi tanda tangan dari nilai hash yang ditentukan. (Diperoleh dari AsymmetricSignatureDeformatter)

Lihat juga

• Layanan Kriptografi