DataObject Classe

Definição

Namespace:

System.Security.Cryptography.Xml

Assembly:

System.Security.Cryptography.Xml.dll

Pacote:

System.Security.Cryptography.Xml v9.0.0-rc.2.24473.5

Origem:

DataObject.cs

Representa o elemento de objeto de uma assinatura XML que contém os dados a serem assinados.

public ref class DataObject

public class DataObject

type DataObject = class

Public Class DataObject

Herança

Object

DataObject

Exemplos

O exemplo de código a seguir demonstra como gerar uma assinatura XML envolvente.

#using <System.dll>
#using <System.Xml.dll>
#using <System.Security.dll>

using namespace System;
using namespace System::IO;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::Xml;
using namespace System::Xml;
int main()
{
   
   // Create example data to sign.
   XmlDocument^ document = gcnew XmlDocument;
   XmlNode^ node = document->CreateNode( XmlNodeType::Element, "", "MyElement", "samples" );
   node->InnerText = "This is some text";
   document->AppendChild( node );
   Console::Error->WriteLine( "Data to sign:\n{0}\n", document->OuterXml );
   
   // Create the SignedXml message.
   SignedXml^ signedXml = gcnew SignedXml;
   RSA^ key = RSA::Create();
   signedXml->SigningKey = key;
   
   // Create a data object to hold the data to sign.
   DataObject^ dataObject = gcnew DataObject;
   dataObject->Data = document->ChildNodes;
   dataObject->Id = "MyObjectId";
   
   // Add the data object to the signature.
   signedXml->AddObject( dataObject );
   
   // Create a reference to be able to package everything into the
   // message.
   Reference^ reference = gcnew Reference;
   reference->Uri = "#MyObjectId";
   
   // Add it to the message.
   signedXml->AddReference( reference );
   
   // Add a KeyInfo.
   KeyInfo^ keyInfo = gcnew KeyInfo;
   keyInfo->AddClause( gcnew RSAKeyValue( key ) );
   signedXml->KeyInfo = keyInfo;
   
   // Compute the signature.
   signedXml->ComputeSignature();
   
   // Get the XML representation of the signature.
   XmlElement^ xmlSignature = signedXml->GetXml();
   Console::WriteLine( xmlSignature->OuterXml );
}

using System;
using System.IO;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Xml;

public class XMLdsigsample1 {

static void Main(String[] args)
{
     // Create example data to sign.
     XmlDocument document = new XmlDocument();
     XmlNode  node = document.CreateNode(XmlNodeType.Element, "", "MyElement", "samples");
     node.InnerText = "This is some text";
     document.AppendChild(node);
     Console.Error.WriteLine("Data to sign:\n" + document.OuterXml + "\n");

     // Create the SignedXml message.
     SignedXml signedXml = new SignedXml();
     RSA key = RSA.Create();
     signedXml.SigningKey = key;

     // Create a data object to hold the data to sign.
     DataObject dataObject = new DataObject();
     dataObject.Data = document.ChildNodes;
     dataObject.Id = "MyObjectId";

     // Add the data object to the signature.
     signedXml.AddObject(dataObject);

     // Create a reference to be able to package everything into the
     // message.
     Reference reference = new Reference();
     reference.Uri = "#MyObjectId";

     // Add it to the message.
     signedXml.AddReference(reference);

     // Add a KeyInfo.
     KeyInfo keyInfo = new KeyInfo();
     keyInfo.AddClause(new RSAKeyValue(key));
     signedXml.KeyInfo = keyInfo;

     // Compute the signature.
     signedXml.ComputeSignature();

     // Get the XML representation of the signature.
     XmlElement xmlSignature = signedXml.GetXml();
     Console.WriteLine(xmlSignature.OuterXml);
}
}

Imports System.IO
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.Xml

 _


Public Class XMLdsigsample1

   Shared Sub Main(args() As [String])
      ' Create example data to sign.
      Dim document As New XmlDocument()
      Dim node As XmlNode = document.CreateNode(XmlNodeType.Element, "", "MyElement", "samples")
      node.InnerText = "This is some text"
      document.AppendChild(node)
      Console.Error.WriteLine("Data to sign:")
      Console.Error.WriteLine()
      Console.Error.WriteLine(document.OuterXml)
      Console.Error.WriteLine()
      
      ' Create the SignedXml message.
      Dim signedXml As New SignedXml()
      Dim key As RSA = RSA.Create()
      signedXml.SigningKey = key
      
      ' Create a data object to hold the data to sign.
      Dim dataObject As New DataObject()
      dataObject.Data = document.ChildNodes
      dataObject.Id = "MyObjectId"
      
      ' Add the data object to the signature.
      signedXml.AddObject(dataObject)
      
      ' Create a reference to be able to package everything into the
      ' message.
      Dim reference As New Reference()
      reference.Uri = "#MyObjectId"
      
      ' Add it to the message.
      signedXml.AddReference(reference)
      
      ' Add a KeyInfo.
      Dim keyInfo As New KeyInfo()
      keyInfo.AddClause(New RSAKeyValue(key))
      signedXml.KeyInfo = keyInfo
      
      ' Compute the signature.
      signedXml.ComputeSignature()
      
      ' Get the XML representation of the signature.
      Dim xmlSignature As XmlElement = signedXml.GetXml()
      Console.WriteLine(xmlSignature.OuterXml)
   End Sub
End Class

O exemplo de código a seguir demonstra como marcar uma assinatura XML.

#using <System.dll>
#using <System.Security.dll>
#using <System.Xml.dll>

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::Xml;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   array<String^>^args = System::Environment::GetCommandLineArgs();
   Console::WriteLine( "Verifying {0}...", args[ 1 ] );

   // Create a SignedXml.
   SignedXml^ signedXml = gcnew SignedXml;

   // Load the XML.
   XmlDocument^ xmlDocument = gcnew XmlDocument;
   xmlDocument->PreserveWhitespace = true;
   xmlDocument->Load( gcnew XmlTextReader( args[ 1 ] ) );
   XmlNodeList^ nodeList = xmlDocument->GetElementsByTagName( "Signature" );
   signedXml->LoadXml( safe_cast<XmlElement^>(nodeList[ 0 ]) );
   if ( signedXml->CheckSignature() )
   {
      Console::WriteLine( "Signature check OK" );
   }
   else
   {
      Console::WriteLine( "Signature check FAILED" );
   }
}

using System;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.IO;
using System.Xml;

public class Verify {

    public static void Main(String[] args)
    {

        Console.WriteLine("Verifying " + args[0] + "...");

        // Create a SignedXml.
        SignedXml signedXml = new SignedXml();

        // Load the XML.
        XmlDocument xmlDocument = new XmlDocument();
        xmlDocument.PreserveWhitespace = true;
        xmlDocument.Load(new XmlTextReader(args[0]));

        XmlNodeList nodeList = xmlDocument.GetElementsByTagName("Signature");
        signedXml.LoadXml((XmlElement)nodeList[0]);

        if (signedXml.CheckSignature()) {
            Console.WriteLine("Signature check OK");
        } else {
            Console.WriteLine("Signature check FAILED");
        }
    }
}

Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.IO
Imports System.Xml

 _

Public Class Verify
   
   Public Shared Sub Main(args() As [String])
      
      Console.WriteLine(("Verifying " + args(0) + "..."))
      
      ' Create a SignedXml.
      Dim signedXml As New SignedXml()
      
      ' Load the XML.
      Dim xmlDocument As New XmlDocument()
      xmlDocument.PreserveWhitespace = True
      xmlDocument.Load(New XmlTextReader(args(0)))
      
      Dim nodeList As XmlNodeList = xmlDocument.GetElementsByTagName("Signature")
      signedXml.LoadXml(CType(nodeList(0), XmlElement))
      
      If signedXml.CheckSignature() Then
         Console.WriteLine("Signature check OK")
      Else
         Console.WriteLine("Signature check FAILED")
      End If
   End Sub
End Class

Comentários

Use a DataObject classe para armazenar informações ou metadados diretamente em uma assinatura XML. Por exemplo, você pode armazenar a data de geração da assinatura ou a identidade do signatário. A DataObject classe pode ou não ser coberta pela assinatura XML.

A classe corresponde ao <Object> elemento na especificação W3C (World Wide Web Consortium) para Assinaturas XML. Para obter mais informações sobre a especificação W3C, consulte https://www.w3.org/TR/xmldsig-core/.

Construtores

DataObject()	Inicializa uma nova instância da classe DataObject.
DataObject(String, String, String, XmlElement)	Inicializa uma nova instância da classe DataObject com a identificação, tipo MIME, codificação e dados especificados.

Propriedades

Data	Obtém ou define o valor de dados do objeto DataObject atual.
Encoding	Obtém ou define a codificação do objeto DataObject atual.
Id	Obtém ou define a identificação do objeto DataObject atual.
MimeType	Obtém ou define o tipo MIME do objeto DataObject atual.

Métodos

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)
GetXml()	Retorna a representação XML do objeto DataObject.
LoadXml(XmlElement)	Carrega um estado DataObject de um elemento XML.
MemberwiseClone()	Cria uma cópia superficial do Object atual. (Herdado de Object)
ToString()	Retorna uma cadeia de caracteres que representa o objeto atual. (Herdado de Object)