DSASignatureDeformatter Třída

Definice

Obor názvů:

System.Security.Cryptography

Sestavení:

System.Security.Cryptography.Algorithms.dll

Sestavení:

System.Security.Cryptography.dll

Sestavení:

mscorlib.dll

Sestavení:

netstandard.dll

Ověří podpis PKCS#1 v1.5.DSA

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

[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public class DSASignatureDeformatter : System.Security.Cryptography.AsymmetricSignatureDeformatter

public class DSASignatureDeformatter : System.Security.Cryptography.AsymmetricSignatureDeformatter

[System.Runtime.InteropServices.ComVisible(true)]
public class DSASignatureDeformatter : System.Security.Cryptography.AsymmetricSignatureDeformatter

[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
type DSASignatureDeformatter = class
    inherit AsymmetricSignatureDeformatter

type DSASignatureDeformatter = class
    inherit AsymmetricSignatureDeformatter

[<System.Runtime.InteropServices.ComVisible(true)>]
type DSASignatureDeformatter = class
    inherit AsymmetricSignatureDeformatter

Public Class DSASignatureDeformatter
Inherits AsymmetricSignatureDeformatter

Dědičnost

Object

AsymmetricSignatureDeformatter

DSASignatureDeformatter

Atributy

UnsupportedOSPlatformAttribute ComVisibleAttribute

Příklady

#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

Poznámky

Důležité

Tvůrci algoritmu DSA odvolali svou podporu. Zvažte použití RSA třídy nebo ECDsa třídy místo DSA třídy. Používejte DSA jenom kvůli kompatibilitě se staršími aplikacemi a daty.

Konstruktory

DSASignatureDeformatter()	Inicializuje novou instanci DSASignatureDeformatter třídy.
DSASignatureDeformatter(AsymmetricAlgorithm)	Inicializuje novou instanci DSASignatureDeformatter třídy se zadaným klíčem.

Metody

Equals(Object)	Určí, zda se zadaný objekt rovná aktuálnímu objektu. (Zděděno od Object)
GetHashCode()	Slouží jako výchozí funkce hash. (Zděděno od Object)
GetType()	Type Získá aktuální instanci. (Zděděno od Object)
MemberwiseClone()	Vytvoří použádnou kopii aktuálního souboru Object. (Zděděno od Object)
SetHashAlgorithm(String)	Určuje hashovací algoritmus pro signaturu Digital Signature Algorithm (DSA) signaturatter.
SetKey(AsymmetricAlgorithm)	Určuje klíč, který se má použít pro podpis digital Signature Algorithm (DSA) deformace.
ToString()	Vrátí řetězec, který představuje aktuální objekt. (Zděděno od Object)
VerifySignature(Byte[], Byte[])	Ověřuje podpis algoritmu digitálního podpisu (DSA) u dat.
VerifySignature(HashAlgorithm, Byte[])	Ověří podpis ze zadané hodnoty hash. (Zděděno od AsymmetricSignatureDeformatter)

Viz také

• Šifrovací služby