DSASignatureDeformatter Класс

Определение

Проверяет подпись, созданную по алгоритму PKCS 1 v1.5 DSA (DSA).Verifies a Digital Signature Algorithm (DSA) PKCS#1 v1.5 signature.

public ref 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
type DSASignatureDeformatter = class
    inherit AsymmetricSignatureDeformatter
[<System.Runtime.InteropServices.ComVisible(true)>]
type DSASignatureDeformatter = class
    inherit AsymmetricSignatureDeformatter
Public Class DSASignatureDeformatter
Inherits AsymmetricSignatureDeformatter
Наследование
DSASignatureDeformatter
Атрибуты

Примеры

#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

Комментарии

Важно!

Создатели алгоритма DSA отменяют их поддержку.The creators of the DSA algorithm have withdrawn their support for it. RSAВместо класса рекомендуется использовать класс или ECDsa класс DSA .Consider using the RSA class or the ECDsa class instead of the DSA class. Используйте DSA только для обеспечения совместимости с устаревшими приложениями и данными.Use DSA only for compatibility with legacy applications and data.

Конструкторы

DSASignatureDeformatter()

Инициализирует новый экземпляр класса DSASignatureDeformatter.Initializes a new instance of the DSASignatureDeformatter class.

DSASignatureDeformatter(AsymmetricAlgorithm)

Инициализирует новый экземпляр класса DSASignatureDeformatter с заданным ключом.Initializes a new instance of the DSASignatureDeformatter class with the specified key.

Методы

Equals(Object)

Определяет, равен ли указанный объект текущему объекту.Determines whether the specified object is equal to the current object.

(Унаследовано от Object)
GetHashCode()

Служит хэш-функцией по умолчанию.Serves as the default hash function.

(Унаследовано от Object)
GetType()

Возвращает объект Type для текущего экземпляра.Gets the Type of the current instance.

(Унаследовано от Object)
MemberwiseClone()

Создает неполную копию текущего объекта Object.Creates a shallow copy of the current Object.

(Унаследовано от Object)
SetHashAlgorithm(String)

Задает хэш-алгоритм для объекта проверки подписи DSA (DSA).Specifies the hash algorithm for the Digital Signature Algorithm (DSA) signature deformatter.

SetKey(AsymmetricAlgorithm)

Задает ключ, используемый объектом проверки подписи DSA (DSA).Specifies the key to be used for the Digital Signature Algorithm (DSA) signature deformatter.

ToString()

Возвращает строку, представляющую текущий объект.Returns a string that represents the current object.

(Унаследовано от Object)
VerifySignature(Byte[], Byte[])

Проверяет подпись DSA (DSA), созданную для данных.Verifies the Digital Signature Algorithm (DSA) signature on the data.

VerifySignature(HashAlgorithm, Byte[])

Проверяет подпись из указанного хэш-значения.Verifies the signature from the specified hash value.

(Унаследовано от AsymmetricSignatureDeformatter)

Применяется к

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