DSASignatureFormatter Classe

Definição

Namespace:

System.Security.Cryptography

Assembly:

System.Security.Cryptography.Algorithms.dll

Assembly:

System.Security.Cryptography.dll

Assembly:

mscorlib.dll

Assembly:

netstandard.dll

Cria uma assinatura DSA (Algoritmo de Assinatura Digital).

public ref class DSASignatureFormatter : System::Security::Cryptography::AsymmetricSignatureFormatter

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

public class DSASignatureFormatter : System.Security.Cryptography.AsymmetricSignatureFormatter

[System.Runtime.InteropServices.ComVisible(true)]
public class DSASignatureFormatter : System.Security.Cryptography.AsymmetricSignatureFormatter

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

type DSASignatureFormatter = class
    inherit AsymmetricSignatureFormatter

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

Public Class DSASignatureFormatter
Inherits AsymmetricSignatureFormatter

Herança

Object

AsymmetricSignatureFormatter

DSASignatureFormatter

Atributos

UnsupportedOSPlatformAttribute ComVisibleAttribute

Exemplos

#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 );
   }
   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);
        }
        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)

        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub
End Class

Comentários

Importante

Os criadores do algoritmo DSA retiraram o suporte para ele. Considere usar a RSA classe ou a ECDsa classe em vez da DSA classe. Use DSA apenas para compatibilidade com aplicativos e dados herdados.

Construtores

DSASignatureFormatter()	Inicializa uma nova instância da classe DSASignatureFormatter.
DSASignatureFormatter(AsymmetricAlgorithm)	Inicializa uma nova instância da classe DSASignatureFormatter com a chave especificada.

Métodos

CreateSignature(Byte[])	Cria a assinatura PKCS nº 1 DSA (Algoritmo de Assinatura Digital) para os dados especificados.
CreateSignature(HashAlgorithm)	Cria a assinatura com o valor de hash especificado. (Herdado de AsymmetricSignatureFormatter)
Equals(Object)	Determina se o objeto especificado é igual ao objeto atual. (Herdado de Object)
GetHashCode()	Serve como a função de hash padrão. (Herdado de Object)
GetType()	Obtém o Type da instância atual. (Herdado de Object)
MemberwiseClone()	Cria uma cópia superficial do Object atual. (Herdado de Object)
SetHashAlgorithm(String)	Especifica o algoritmo de hash para o formatador de assinatura DSA (Algoritmo de Assinatura Digital).
SetKey(AsymmetricAlgorithm)	Especifica a chave a ser usada para o formatador de assinatura DSA (Algoritmo de Assinatura Digital).
ToString()	Retorna uma cadeia de caracteres que representa o objeto atual. (Herdado de Object)

Confira também

• Serviços criptográficos