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EncryptedXml Sınıf

Tanım

XML şifrelemesi uygulamak için işlem modelini temsil eder.

public ref class EncryptedXml
public class EncryptedXml
type EncryptedXml = class
Public Class EncryptedXml
Devralma
EncryptedXml

Örnekler

Aşağıdaki kod örneği, bir XML belgesini şifrelemek için algoritmayı TripleDES kullanan basit bir yardımcı program sınıfının nasıl oluşturulacağını gösterir.

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

using namespace System;
using namespace System::Xml;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::Xml;

ref class TrippleDESDocumentEncryption
{
protected:
   XmlDocument^ docValue;
   TripleDES^ algValue;

public:
   TrippleDESDocumentEncryption( XmlDocument^ Doc, TripleDES^ Key )
   {
      if ( Doc != nullptr )
      {
         docValue = Doc;
      }
      else
      {
         throw gcnew ArgumentNullException( L"Doc" );
      }

      if ( Key != nullptr )
      {
         algValue = Key;
      }
      else
      {
         throw gcnew ArgumentNullException( L"Key" );
      }
   }


   property XmlDocument^ Doc
   {
      XmlDocument^ get()
      {
         return docValue;
      }

      void set( XmlDocument^ value )
      {
         docValue = value;
      }

   }

   property TripleDES^ Alg
   {
      TripleDES^ get()
      {
         return algValue;
      }

      void set( TripleDES^ value )
      {
         algValue = value;
      }

   }
   void Clear()
   {
      if ( algValue != nullptr )
      {
         algValue->Clear();
      }
      else
      {
         throw gcnew Exception( L"No TripleDES key was found to clear." );
      }
   }

   void Encrypt( String^ Element )
   {

      // Find the element by name and create a new
      // XmlElement object.
      XmlElement^ inputElement = dynamic_cast<XmlElement^>(docValue->GetElementsByTagName( Element )->Item( 0 ));

      // If the element was not found, throw an exception.
      if ( inputElement == nullptr )
      {
         throw gcnew Exception( L"The element was not found." );
      }


      // Create a new EncryptedXml object.
      EncryptedXml^ exml = gcnew EncryptedXml( docValue );

      // Encrypt the element using the symmetric key.
      array<Byte>^rgbOutput = exml->EncryptData( inputElement, algValue, false );

      // Create an EncryptedData object and populate it.
      EncryptedData^ ed = gcnew EncryptedData;

      // Specify the namespace URI for XML encryption elements.
      ed->Type = EncryptedXml::XmlEncElementUrl;

      // Specify the namespace URI for the TrippleDES algorithm.
      ed->EncryptionMethod = gcnew EncryptionMethod( EncryptedXml::XmlEncTripleDESUrl );

      // Create a CipherData element.
      ed->CipherData = gcnew CipherData;

      // Set the CipherData element to the value of the encrypted XML element.
      ed->CipherData->CipherValue = rgbOutput;

      // Replace the plaintext XML elemnt with an EncryptedData element.
      EncryptedXml::ReplaceElement( inputElement, ed, false );
   }

   void Decrypt()
   {

      // XmlElement object.
      XmlElement^ encryptedElement = dynamic_cast<XmlElement^>(docValue->GetElementsByTagName( L"EncryptedData" )->Item( 0 ));

      // If the EncryptedData element was not found, throw an exception.
      if ( encryptedElement == nullptr )
      {
         throw gcnew Exception( L"The EncryptedData element was not found." );
      }


      // Create an EncryptedData object and populate it.
      EncryptedData^ ed = gcnew EncryptedData;
      ed->LoadXml( encryptedElement );

      // Create a new EncryptedXml object.
      EncryptedXml^ exml = gcnew EncryptedXml;

      // Decrypt the element using the symmetric key.
      array<Byte>^rgbOutput = exml->DecryptData( ed, algValue );

      // Replace the encryptedData element with the plaintext XML elemnt.
      exml->ReplaceData( encryptedElement, rgbOutput );
   }

};

int main()
{

   // Create an XmlDocument object.
   XmlDocument^ xmlDoc = gcnew XmlDocument;

   // Load an XML file into the XmlDocument object.
   try
   {
      xmlDoc->PreserveWhitespace = true;
      xmlDoc->Load( L"test.xml" );
   }
   catch ( Exception^ e )
   {
      Console::WriteLine( e->Message );
      return 0;
   }


   // Create a new TripleDES key.
   TripleDESCryptoServiceProvider^ tDESkey = gcnew TripleDESCryptoServiceProvider;

   // Create a new instance of the TrippleDESDocumentEncryption object
   // defined in this sample.
   TrippleDESDocumentEncryption^ xmlTDES = gcnew TrippleDESDocumentEncryption( xmlDoc,tDESkey );
   try
   {

      // Encrypt the "creditcard" element.
      xmlTDES->Encrypt( L"creditcard" );

      // Display the encrypted XML to the console.
      Console::WriteLine( L"Encrypted XML:" );
      Console::WriteLine();
      Console::WriteLine( xmlTDES->Doc->OuterXml );

      // Decrypt the "creditcard" element.
      xmlTDES->Decrypt();

      // Display the encrypted XML to the console.
      Console::WriteLine();
      Console::WriteLine( L"Decrypted XML:" );
      Console::WriteLine();
      Console::WriteLine( xmlTDES->Doc->OuterXml );
   }
   catch ( Exception^ e )
   {
      Console::WriteLine( e->Message );
   }
   finally
   {

      // Clear the TripleDES key.
      xmlTDES->Clear();
   }

   return 1;
}
using System;
using System.Xml;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;

    class Program
    {
        static void Main(string[] args)
        {

            // Create an XmlDocument object.
            XmlDocument xmlDoc = new XmlDocument();

            // Load an XML file into the XmlDocument object.
            try
            {
                xmlDoc.PreserveWhitespace = true;
                xmlDoc.Load("test.xml");
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                return;
            }

            // Create a new TripleDES key.
            TripleDESCryptoServiceProvider tDESkey = new TripleDESCryptoServiceProvider();

            // Create a new instance of the TrippleDESDocumentEncryption object
            // defined in this sample.
            TrippleDESDocumentEncryption xmlTDES = new TrippleDESDocumentEncryption(xmlDoc, tDESkey);
            
            try
            {
                // Encrypt the "creditcard" element.
                xmlTDES.Encrypt("creditcard");

                // Display the encrypted XML to the console.
                Console.WriteLine("Encrypted XML:");
                Console.WriteLine();
                Console.WriteLine(xmlTDES.Doc.OuterXml);

                // Decrypt the "creditcard" element.
                xmlTDES.Decrypt();

                // Display the encrypted XML to the console.
                Console.WriteLine();
                Console.WriteLine("Decrypted XML:");
                Console.WriteLine();
                Console.WriteLine(xmlTDES.Doc.OuterXml);
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            finally
            {
                // Clear the TripleDES key.
                xmlTDES.Clear();
            }
        }
    }

class TrippleDESDocumentEncryption
{
    protected XmlDocument docValue;
    protected TripleDES algValue;

    public TrippleDESDocumentEncryption(XmlDocument Doc, TripleDES Key)
    {
        if (Doc != null)
        {
            docValue = Doc;
        }
        else
        {
            throw new ArgumentNullException("Doc");
        }

        if (Key != null)
        {

            algValue = Key;
        }
        else
        {
            throw new ArgumentNullException("Key");
        }
    }

    public XmlDocument Doc { set { docValue = value; } get { return docValue; } }
    public TripleDES Alg { set { algValue = value; } get { return algValue; } }

    public void Clear()
    {
        if (algValue != null)
        {
            algValue.Clear();
        }
        else
        {
            throw new Exception("No TripleDES key was found to clear.");
        }
    }

    public void Encrypt(string Element)
    {
        // Find the element by name and create a new
        // XmlElement object.
        XmlElement inputElement = docValue.GetElementsByTagName(Element)[0] as XmlElement;

        // If the element was not found, throw an exception.
        if (inputElement == null)
        {
            throw new Exception("The element was not found.");
        }

        // Create a new EncryptedXml object.
        EncryptedXml exml = new EncryptedXml(docValue);

        // Encrypt the element using the symmetric key.
        byte[] rgbOutput = exml.EncryptData(inputElement, algValue, false);

        // Create an EncryptedData object and populate it.
        EncryptedData ed = new EncryptedData();

        // Specify the namespace URI for XML encryption elements.
        ed.Type = EncryptedXml.XmlEncElementUrl;

        // Specify the namespace URI for the TrippleDES algorithm.
        ed.EncryptionMethod = new EncryptionMethod(EncryptedXml.XmlEncTripleDESUrl);

        // Create a CipherData element.
        ed.CipherData = new CipherData();

        // Set the CipherData element to the value of the encrypted XML element.
        ed.CipherData.CipherValue = rgbOutput;

        // Replace the plaintext XML elemnt with an EncryptedData element.
        EncryptedXml.ReplaceElement(inputElement, ed, false);
    }

    public void Decrypt()
    {

        // XmlElement object.
        XmlElement encryptedElement = docValue.GetElementsByTagName("EncryptedData")[0] as XmlElement;

        // If the EncryptedData element was not found, throw an exception.
        if (encryptedElement == null)
        {
            throw new Exception("The EncryptedData element was not found.");
        }

        // Create an EncryptedData object and populate it.
        EncryptedData ed = new EncryptedData();
        ed.LoadXml(encryptedElement);

        // Create a new EncryptedXml object.
        EncryptedXml exml = new EncryptedXml();

        // Decrypt the element using the symmetric key.
        byte[] rgbOutput = exml.DecryptData(ed, algValue);

        // Replace the encryptedData element with the plaintext XML elemnt.
        exml.ReplaceData(encryptedElement, rgbOutput);
    }
}
Imports System.Xml
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml



Module Program

    Sub Main(ByVal args() As String)

        ' Create an XmlDocument object.
        Dim xmlDoc As New XmlDocument()

        ' Load an XML file into the XmlDocument object.
        xmlDoc.PreserveWhitespace = True
        xmlDoc.Load("test.xml")


        ' Create a new TripleDES key. 
        Dim tDESkey As New TripleDESCryptoServiceProvider()

        ' Create a new instance of the TrippleDESDocumentEncryption object
        ' defined in this sample.
        Dim xmlTDES As New TrippleDESDocumentEncryption(xmlDoc, tDESkey)

        Try
            ' Encrypt the "creditcard" element.
            xmlTDES.Encrypt("creditcard")

            ' Display the encrypted XML to the console.
            Console.WriteLine("Encrypted XML:")
            Console.WriteLine()
            Console.WriteLine(xmlTDES.Doc.OuterXml)

            ' Decrypt the "creditcard" element.
            xmlTDES.Decrypt()

            ' Display the encrypted XML to the console.
            Console.WriteLine()
            Console.WriteLine("Decrypted XML:")
            Console.WriteLine()
            Console.WriteLine(xmlTDES.Doc.OuterXml)
        Catch e As Exception
            Console.WriteLine(e.Message)
        Finally
            ' Clear the TripleDES key.
            xmlTDES.Clear()
        End Try

    End Sub
End Module 'Program



Class TrippleDESDocumentEncryption
    Protected docValue As XmlDocument
    Protected algValue As TripleDES


    Public Sub New(ByVal Doc As XmlDocument, ByVal Key As TripleDES)
        If Not (Doc Is Nothing) Then
            docValue = Doc
        Else
            Throw New ArgumentNullException("Doc")
        End If

        If Not (Key Is Nothing) Then

            algValue = Key
        Else
            Throw New ArgumentNullException("Key")
        End If

    End Sub


    Public Property Doc() As XmlDocument
        Get
            Return docValue
        End Get
        Set(ByVal value As XmlDocument)
            docValue = value
        End Set
    End Property

    Public Property Alg() As TripleDES
        Get
            Return algValue
        End Get
        Set(ByVal value As TripleDES)
            algValue = value
        End Set
    End Property

    Public Sub Clear()
        If Not (algValue Is Nothing) Then
            algValue.Clear()
        Else
            Throw New Exception("No TripleDES key was found to clear.")
        End If

    End Sub


    Public Sub Encrypt(ByVal Element As String)
        ' Find the element by name and create a new
        ' XmlElement object.
        Dim inputElement As XmlElement = docValue.GetElementsByTagName(Element)(0)

        ' If the element was not found, throw an exception.
        If inputElement Is Nothing Then
            Throw New Exception("The element was not found.")
        End If

        ' Create a new EncryptedXml object.
        Dim exml As New EncryptedXml(docValue)

        ' Encrypt the element using the symmetric key.
        Dim rgbOutput As Byte() = exml.EncryptData(inputElement, algValue, False)

        ' Create an EncryptedData object and populate it.
        Dim ed As New EncryptedData()

        ' Specify the namespace URI for XML encryption elements.
        ed.Type = EncryptedXml.XmlEncElementUrl

        ' Specify the namespace URI for the TrippleDES algorithm.
        ed.EncryptionMethod = New EncryptionMethod(EncryptedXml.XmlEncTripleDESUrl)

        ' Create a CipherData element.
        ed.CipherData = New CipherData()

        ' Set the CipherData element to the value of the encrypted XML element.
        ed.CipherData.CipherValue = rgbOutput

        ' Replace the plaintext XML elemnt with an EncryptedData element.
        EncryptedXml.ReplaceElement(inputElement, ed, False)

    End Sub


    Public Sub Decrypt()

        ' XmlElement object.
        Dim encryptedElement As XmlElement = docValue.GetElementsByTagName("EncryptedData")(0)

        ' If the EncryptedData element was not found, throw an exception.
        If encryptedElement Is Nothing Then
            Throw New Exception("The EncryptedData element was not found.")
        End If

        ' Create an EncryptedData object and populate it.
        Dim ed As New EncryptedData()
        ed.LoadXml(encryptedElement)

        ' Create a new EncryptedXml object.
        Dim exml As New EncryptedXml()

        ' Decrypt the element using the symmetric key.
        Dim rgbOutput As Byte() = exml.DecryptData(ed, algValue)

        ' Replace the encryptedData element with the plaintext XML elemnt.
        exml.ReplaceData(encryptedElement, rgbOutput)

    End Sub
End Class

Aşağıdaki kod örneğinde, bir XML belgesinin simetrik anahtar kullanılarak nasıl şifrelenmesi gösterilmektedir. Bu örnek, şifrelenmiş XML belgesinde herhangi bir anahtar bilgisi içermez.

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

using namespace System;
using namespace System::Xml;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::Xml;
static void Encrypt( XmlDocument^ Doc, String^ ElementToEncrypt, SymmetricAlgorithm^ Alg )
{

   // Check the arguments.
   if ( Doc == nullptr )
      throw gcnew ArgumentNullException( L"Doc" );

   if ( ElementToEncrypt == nullptr )
      throw gcnew ArgumentNullException( L"ElementToEncrypt" );

   if ( Alg == nullptr )
      throw gcnew ArgumentNullException( L"Alg" );


   ////////////////////////////////////////////////
   // Find the specified element in the XmlDocument
   // object and create a new XmlElemnt object.
   ////////////////////////////////////////////////
   XmlElement^ elementToEncrypt = dynamic_cast<XmlElement^>(Doc->GetElementsByTagName( ElementToEncrypt )->Item( 0 ));

   // Throw an XmlException if the element was not found.
   if ( elementToEncrypt == nullptr )
   {
      throw gcnew XmlException( L"The specified element was not found" );
   }


   //////////////////////////////////////////////////
   // Create a new instance of the EncryptedXml class
   // and use it to encrypt the XmlElement with the
   // symmetric key.
   //////////////////////////////////////////////////
   EncryptedXml^ eXml = gcnew EncryptedXml;
   array<Byte>^encryptedElement = eXml->EncryptData( elementToEncrypt, Alg, false );

   ////////////////////////////////////////////////
   // Construct an EncryptedData object and populate
   // it with the desired encryption information.
   ////////////////////////////////////////////////
   EncryptedData^ edElement = gcnew EncryptedData;
   edElement->Type = EncryptedXml::XmlEncElementUrl;

   // Create an EncryptionMethod element so that the
   // receiver knows which algorithm to use for decryption.
   // Determine what kind of algorithm is being used and
   // supply the appropriate URL to the EncryptionMethod element.
   String^ encryptionMethod = nullptr;
   if ( dynamic_cast<TripleDES^>(Alg) )
   {
      encryptionMethod = EncryptedXml::XmlEncTripleDESUrl;
   }
   else
   if ( dynamic_cast<DES^>(Alg) )
   {
      encryptionMethod = EncryptedXml::XmlEncDESUrl;
   }
   else
   if ( dynamic_cast<Aes^>(Alg) )
   {
      switch ( Alg->KeySize )
      {
         case 128:
            encryptionMethod = EncryptedXml::XmlEncAES128Url;
            break;

         case 192:
            encryptionMethod = EncryptedXml::XmlEncAES192Url;
            break;

         case 256:
            encryptionMethod = EncryptedXml::XmlEncAES256Url;
            break;
      }
   }
   else
   {

      // Throw an exception if the transform is not in the previous categories
      throw gcnew CryptographicException( L"The specified algorithm is not supported for XML Encryption." );
   }



   edElement->EncryptionMethod = gcnew EncryptionMethod( encryptionMethod );

   // Add the encrypted element data to the
   // EncryptedData object.
   edElement->CipherData->CipherValue = encryptedElement;

   ////////////////////////////////////////////////////
   // Replace the element from the original XmlDocument
   // object with the EncryptedData element.
   ////////////////////////////////////////////////////
   EncryptedXml::ReplaceElement( elementToEncrypt, edElement, false );
}

static void Decrypt( XmlDocument^ Doc, SymmetricAlgorithm^ Alg )
{

   // Check the arguments.
   if ( Doc == nullptr )
      throw gcnew ArgumentNullException( L"Doc" );

   if ( Alg == nullptr )
      throw gcnew ArgumentNullException( L"Alg" );


   // Find the EncryptedData element in the XmlDocument.
   XmlElement^ encryptedElement = dynamic_cast<XmlElement^>(Doc->GetElementsByTagName( L"EncryptedData" )->Item( 0 ));

   // If the EncryptedData element was not found, throw an exception.
   if ( encryptedElement == nullptr )
   {
      throw gcnew XmlException( L"The EncryptedData element was not found." );
   }


   // Create an EncryptedData object and populate it.
   EncryptedData^ edElement = gcnew EncryptedData;
   edElement->LoadXml( encryptedElement );

   // Create a new EncryptedXml object.
   EncryptedXml^ exml = gcnew EncryptedXml;

   // Decrypt the element using the symmetric key.
   array<Byte>^rgbOutput = exml->DecryptData( edElement, Alg );

   // Replace the encryptedData element with the plaintext XML element.
   exml->ReplaceData( encryptedElement, rgbOutput );
}

int main()
{

   // Create an XmlDocument object.
   XmlDocument^ xmlDoc = gcnew XmlDocument;

   // Load an XML file into the XmlDocument object.
   try
   {
      xmlDoc->PreserveWhitespace = true;
      xmlDoc->Load( L"test.xml" );
   }
   catch ( Exception^ e )
   {
      Console::WriteLine( e->Message );
      return 0;
   }


   // Create a new TripleDES key.
   TripleDESCryptoServiceProvider^ tDESkey = gcnew TripleDESCryptoServiceProvider;
   try
   {

      // Encrypt the "creditcard" element.
      Encrypt( xmlDoc, L"creditcard", tDESkey );

      // Display the encrypted XML to the console.
      Console::WriteLine( L"Encrypted XML:" );
      Console::WriteLine();
      Console::WriteLine( xmlDoc->OuterXml );

      // Decrypt the "creditcard" element.
      Decrypt( xmlDoc, tDESkey );

      // Display the encrypted XML to the console.
      Console::WriteLine();
      Console::WriteLine( L"Decrypted XML:" );
      Console::WriteLine();
      Console::WriteLine( xmlDoc->OuterXml );
   }
   catch ( Exception^ e )
   {
      Console::WriteLine( e->Message );
   }
   finally
   {

      // Clear the TripleDES key.
      tDESkey->Clear();
   }

}
using System;
using System.Xml;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;

class Program
{
    static void Main(string[] args)
    {

        // Create an XmlDocument object.
        XmlDocument xmlDoc = new XmlDocument();

        // Load an XML file into the XmlDocument object.
        try
        {
            xmlDoc.PreserveWhitespace = true;
            xmlDoc.Load("test.xml");
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
            return;
        }

        // Create a new TripleDES key.
        TripleDESCryptoServiceProvider tDESkey = new TripleDESCryptoServiceProvider();

        try
        {
            // Encrypt the "creditcard" element.
            Encrypt(xmlDoc, "creditcard", tDESkey);

            // Display the encrypted XML to the console.
            Console.WriteLine("Encrypted XML:");
            Console.WriteLine();
            Console.WriteLine(xmlDoc.OuterXml);

            // Decrypt the "creditcard" element.
            Decrypt(xmlDoc, tDESkey);

            // Display the encrypted XML to the console.
            Console.WriteLine();
            Console.WriteLine("Decrypted XML:");
            Console.WriteLine();
            Console.WriteLine(xmlDoc.OuterXml);
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
        finally
        {
            // Clear the TripleDES key.
            tDESkey.Clear();
        }
    }

    public static void Encrypt(XmlDocument Doc, string ElementToEncrypt, SymmetricAlgorithm Alg)
    {
        // Check the arguments.
        if (Doc == null)
            throw new ArgumentNullException("Doc");
        if (ElementToEncrypt == null)
            throw new ArgumentNullException("ElementToEncrypt");
        if (Alg == null)
            throw new ArgumentNullException("Alg");

        ////////////////////////////////////////////////
        // Find the specified element in the XmlDocument
        // object and create a new XmlElemnt object.
        ////////////////////////////////////////////////

        XmlElement elementToEncrypt = Doc.GetElementsByTagName(ElementToEncrypt)[0] as XmlElement;

        // Throw an XmlException if the element was not found.
        if (elementToEncrypt == null)
        {
            throw new XmlException("The specified element was not found");
        }

        //////////////////////////////////////////////////
        // Create a new instance of the EncryptedXml class
        // and use it to encrypt the XmlElement with the
        // symmetric key.
        //////////////////////////////////////////////////

        EncryptedXml eXml = new EncryptedXml();

        byte[] encryptedElement = eXml.EncryptData(elementToEncrypt, Alg, false);

        ////////////////////////////////////////////////
        // Construct an EncryptedData object and populate
        // it with the desired encryption information.
        ////////////////////////////////////////////////

        EncryptedData edElement = new EncryptedData();
        edElement.Type = EncryptedXml.XmlEncElementUrl;

        // Create an EncryptionMethod element so that the
        // receiver knows which algorithm to use for decryption.
        // Determine what kind of algorithm is being used and
        // supply the appropriate URL to the EncryptionMethod element.

        string encryptionMethod = null;

        if (Alg is TripleDES)
        {
            encryptionMethod = EncryptedXml.XmlEncTripleDESUrl;
        }
        else if (Alg is DES)
        {
            encryptionMethod = EncryptedXml.XmlEncDESUrl;
        }
        else if (Alg is Aes)
        {
            switch (Alg.KeySize)
            {
                case 128:
                    encryptionMethod = EncryptedXml.XmlEncAES128Url;
                    break;
                case 192:
                    encryptionMethod = EncryptedXml.XmlEncAES192Url;
                    break;
                case 256:
                    encryptionMethod = EncryptedXml.XmlEncAES256Url;
                    break;
            }
        }
        else
        {
            // Throw an exception if the transform is not in the previous categories
            throw new CryptographicException("The specified algorithm is not supported for XML Encryption.");
        }

        edElement.EncryptionMethod = new EncryptionMethod(encryptionMethod);

        // Add the encrypted element data to the
        // EncryptedData object.
        edElement.CipherData.CipherValue = encryptedElement;

        ////////////////////////////////////////////////////
        // Replace the element from the original XmlDocument
        // object with the EncryptedData element.
        ////////////////////////////////////////////////////

        EncryptedXml.ReplaceElement(elementToEncrypt, edElement, false);
    }

    public static void Decrypt(XmlDocument Doc, SymmetricAlgorithm Alg)
    {
        // Check the arguments.
        if (Doc == null)
            throw new ArgumentNullException("Doc");
        if (Alg == null)
            throw new ArgumentNullException("Alg");

        // Find the EncryptedData element in the XmlDocument.
        XmlElement encryptedElement = Doc.GetElementsByTagName("EncryptedData")[0] as XmlElement;

        // If the EncryptedData element was not found, throw an exception.
        if (encryptedElement == null)
        {
            throw new XmlException("The EncryptedData element was not found.");
        }

        // Create an EncryptedData object and populate it.
        EncryptedData edElement = new EncryptedData();
        edElement.LoadXml(encryptedElement);

        // Create a new EncryptedXml object.
        EncryptedXml exml = new EncryptedXml();

        // Decrypt the element using the symmetric key.
        byte[] rgbOutput = exml.DecryptData(edElement, Alg);

        // Replace the encryptedData element with the plaintext XML element.
        exml.ReplaceData(encryptedElement, rgbOutput);
    }
}
Imports System.Xml
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml



Module Program

    Sub Main(ByVal args() As String)

        ' Create an XmlDocument object.
        Dim xmlDoc As New XmlDocument()

        ' Load an XML file into the XmlDocument object.
        Try
            xmlDoc.PreserveWhitespace = True
            xmlDoc.Load("test.xml")
        Catch e As Exception
            Console.WriteLine(e.Message)
            Return
        End Try

        ' Create a new TripleDES key. 
        Dim tDESkey As New TripleDESCryptoServiceProvider()


        Try
            ' Encrypt the "creditcard" element.
            Encrypt(xmlDoc, "creditcard", tDESkey)

            ' Display the encrypted XML to the console.
            Console.WriteLine("Encrypted XML:")
            Console.WriteLine()
            Console.WriteLine(xmlDoc.OuterXml)

            ' Decrypt the "creditcard" element.
            Decrypt(xmlDoc, tDESkey)

            ' Display the encrypted XML to the console.
            Console.WriteLine()
            Console.WriteLine("Decrypted XML:")
            Console.WriteLine()
            Console.WriteLine(xmlDoc.OuterXml)
        Catch e As Exception
            Console.WriteLine(e.Message)
        Finally
            ' Clear the TripleDES key.
            tDESkey.Clear()
        End Try

    End Sub


    Sub Encrypt(ByVal Doc As XmlDocument, ByVal ElementToEncrypt As String, ByVal Alg As SymmetricAlgorithm)
        ' Check the arguments.  
        If Doc Is Nothing Then
            Throw New ArgumentNullException("Doc")
        End If
        If ElementToEncrypt Is Nothing Then
            Throw New ArgumentNullException("ElementToEncrypt")
        End If
        If Alg Is Nothing Then
            Throw New ArgumentNullException("Alg")
        End If
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Find the specified element in the XmlDocument
        ' object and create a new XmlElemnt object.
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        Dim elementEncrypt As XmlElement = Doc.GetElementsByTagName(ElementToEncrypt)(0)


        ' Throw an XmlException if the element was not found.
        If ElementToEncrypt Is Nothing Then
            Throw New XmlException("The specified element was not found")
        End If

        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Create a new instance of the EncryptedXml class 
        ' and use it to encrypt the XmlElement with the 
        ' symmetric key.
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        Dim eXml As New EncryptedXml()

        Dim encryptedElement As Byte() = eXml.EncryptData(elementEncrypt, Alg, False)

        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Construct an EncryptedData object and populate
        ' it with the desired encryption information.
        '''''''''''''''''''''''''''''''''''''''''''''''''''

        Dim edElement As New EncryptedData()
        edElement.Type = EncryptedXml.XmlEncElementUrl

        ' Create an EncryptionMethod element so that the 
        ' receiver knows which algorithm to use for decryption.
        ' Determine what kind of algorithm is being used and
        ' supply the appropriate URL to the EncryptionMethod element.
        Dim encryptionMethod As String = Nothing

        If TypeOf Alg Is TripleDES Then
            encryptionMethod = EncryptedXml.XmlEncTripleDESUrl
        ElseIf TypeOf Alg Is DES Then
            encryptionMethod = EncryptedXml.XmlEncDESUrl
        ElseIf TypeOf Alg Is Aes Then
            Select Case Alg.KeySize
                Case 128
                    encryptionMethod = EncryptedXml.XmlEncAES128Url
                Case 192
                    encryptionMethod = EncryptedXml.XmlEncAES192Url
                Case 256
                    encryptionMethod = EncryptedXml.XmlEncAES256Url
            End Select
        Else
            ' Throw an exception if the transform is not in the previous categories
            Throw New CryptographicException("The specified algorithm is not supported for XML Encryption.")
        End If

        edElement.EncryptionMethod = New EncryptionMethod(encryptionMethod)

        ' Add the encrypted element data to the 
        ' EncryptedData object.
        edElement.CipherData.CipherValue = encryptedElement

        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Replace the element from the original XmlDocument
        ' object with the EncryptedData element.
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        EncryptedXml.ReplaceElement(elementEncrypt, edElement, False)

    End Sub


    Sub Decrypt(ByVal Doc As XmlDocument, ByVal Alg As SymmetricAlgorithm)
        ' Check the arguments.  
        If Doc Is Nothing Then
            Throw New ArgumentNullException("Doc")
        End If
        If Alg Is Nothing Then
            Throw New ArgumentNullException("Alg")
        End If
        ' Find the EncryptedData element in the XmlDocument.
        Dim encryptedElement As XmlElement = Doc.GetElementsByTagName("EncryptedData")(0)

        ' If the EncryptedData element was not found, throw an exception.
        If encryptedElement Is Nothing Then
            Throw New XmlException("The EncryptedData element was not found.")
        End If

        ' Create an EncryptedData object and populate it.
        Dim edElement As New EncryptedData()
        edElement.LoadXml(encryptedElement)

        ' Create a new EncryptedXml object.
        Dim exml As New EncryptedXml()

        ' Decrypt the element using the symmetric key.
        Dim rgbOutput As Byte() = exml.DecryptData(edElement, Alg)

        ' Replace the encryptedData element with the plaintext XML element.
        exml.ReplaceData(encryptedElement, rgbOutput)

    End Sub
End Module

Aşağıdaki kod örneğinde, bir XML belgesinin simetrik anahtar kullanılarak nasıl şifrelenmesi gösterilmektedir. Bu örnek, şifre çözme yönteminin uygun şifre çözme anahtarını bulmak için kullandığı şifrelenmiş XML belgesine bir anahtar adı ekler.

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

using namespace System;
using namespace System::Xml;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::Xml;
static void Encrypt( XmlDocument^ Doc, String^ ElementToEncrypt, SymmetricAlgorithm^ Alg, String^ KeyName )
{

   // Check the arguments.
   if ( Doc == nullptr )
      throw gcnew ArgumentNullException( L"Doc" );

   if ( ElementToEncrypt == nullptr )
      throw gcnew ArgumentNullException( L"ElementToEncrypt" );

   if ( Alg == nullptr )
      throw gcnew ArgumentNullException( L"Alg" );


   ////////////////////////////////////////////////
   // Find the specified element in the XmlDocument
   // object and create a new XmlElemnt object.
   ////////////////////////////////////////////////
   XmlElement^ elementToEncrypt = dynamic_cast<XmlElement^>(Doc->GetElementsByTagName( ElementToEncrypt )->Item( 0 ));

   // Throw an XmlException if the element was not found.
   if ( elementToEncrypt == nullptr )
   {
      throw gcnew XmlException( L"The specified element was not found" );
   }


   //////////////////////////////////////////////////
   // Create a new instance of the EncryptedXml class
   // and use it to encrypt the XmlElement with the
   // symmetric key.
   //////////////////////////////////////////////////
   EncryptedXml^ eXml = gcnew EncryptedXml;
   array<Byte>^encryptedElement = eXml->EncryptData( elementToEncrypt, Alg, false );

   ////////////////////////////////////////////////
   // Construct an EncryptedData object and populate
   // it with the desired encryption information.
   ////////////////////////////////////////////////
   EncryptedData^ edElement = gcnew EncryptedData;
   edElement->Type = EncryptedXml::XmlEncElementUrl;

   // Create an EncryptionMethod element so that the
   // receiver knows which algorithm to use for decryption.
   // Determine what kind of algorithm is being used and
   // supply the appropriate URL to the EncryptionMethod element.
   String^ encryptionMethod = nullptr;
   if ( dynamic_cast<TripleDES^>(Alg) )
   {
      encryptionMethod = EncryptedXml::XmlEncTripleDESUrl;
   }
   else
   if ( dynamic_cast<DES^>(Alg) )
   {
      encryptionMethod = EncryptedXml::XmlEncDESUrl;
   }
   else
   if ( dynamic_cast<Aes^>(Alg) )
   {
      switch ( Alg->KeySize )
      {
         case 128:
            encryptionMethod = EncryptedXml::XmlEncAES128Url;
            break;

         case 192:
            encryptionMethod = EncryptedXml::XmlEncAES192Url;
            break;

         case 256:
            encryptionMethod = EncryptedXml::XmlEncAES256Url;
            break;
      }
   }
   else
   {

      // Throw an exception if the transform is not in the previous categories
      throw gcnew CryptographicException( L"The specified algorithm is not supported for XML Encryption." );
   }



   edElement->EncryptionMethod = gcnew EncryptionMethod( encryptionMethod );

   // Set the KeyInfo element to specify the
   // name of a key.
   // Create a new KeyInfo element.
   edElement->KeyInfo = gcnew KeyInfo;

   // Create a new KeyInfoName element.
   KeyInfoName^ kin = gcnew KeyInfoName;

   // Specify a name for the key.
   kin->Value = KeyName;

   // Add the KeyInfoName element.
   edElement->KeyInfo->AddClause( kin );

   // Add the encrypted element data to the
   // EncryptedData object.
   edElement->CipherData->CipherValue = encryptedElement;

   ////////////////////////////////////////////////////
   // Replace the element from the original XmlDocument
   // object with the EncryptedData element.
   ////////////////////////////////////////////////////
   EncryptedXml::ReplaceElement( elementToEncrypt, edElement, false );
}

static void Decrypt( XmlDocument^ Doc, SymmetricAlgorithm^ Alg, String^ KeyName )
{

   // Check the arguments.
   if ( Doc == nullptr )
      throw gcnew ArgumentNullException( L"Doc" );

   if ( Alg == nullptr )
      throw gcnew ArgumentNullException( L"Alg" );

   if ( KeyName == nullptr )
      throw gcnew ArgumentNullException( L"KeyName" );


   // Create a new EncryptedXml object.
   EncryptedXml^ exml = gcnew EncryptedXml( Doc );

   // Add a key-name mapping.
   // This method can only decrypt documents
   // that present the specified key name.
   exml->AddKeyNameMapping( KeyName, Alg );

   // Decrypt the element.
   exml->DecryptDocument();
}

int main()
{

   // Create an XmlDocument object.
   XmlDocument^ xmlDoc = gcnew XmlDocument;

   // Load an XML file into the XmlDocument object.
   try
   {
      xmlDoc->PreserveWhitespace = true;
      xmlDoc->Load( L"test.xml" );
   }
   catch ( Exception^ e )
   {
      Console::WriteLine( e->Message );
      return 0;
   }


   // Create a new TripleDES key.
   TripleDESCryptoServiceProvider^ tDESkey = gcnew TripleDESCryptoServiceProvider;
   try
   {

      // Encrypt the "creditcard" element.
      Encrypt( xmlDoc, L"creditcard", tDESkey, L"tDESKey" );

      // Display the encrypted XML to the console.
      Console::WriteLine( L"Encrypted XML:" );
      Console::WriteLine();
      Console::WriteLine( xmlDoc->OuterXml );

      // Decrypt the "creditcard" element.
      Decrypt( xmlDoc, tDESkey, L"tDESKey" );

      // Display the encrypted XML to the console.
      Console::WriteLine();
      Console::WriteLine( L"Decrypted XML:" );
      Console::WriteLine();
      Console::WriteLine( xmlDoc->OuterXml );
   }
   catch ( Exception^ e )
   {
      Console::WriteLine( e->Message );
   }
   finally
   {

      // Clear the TripleDES key.
      tDESkey->Clear();
   }
   return 1;
}
using System;
using System.Xml;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;

class Program
{
    static void Main(string[] args)
    {

        // Create an XmlDocument object.
        XmlDocument xmlDoc = new XmlDocument();

        // Load an XML file into the XmlDocument object.
        try
        {
            xmlDoc.PreserveWhitespace = true;
            xmlDoc.Load("test.xml");
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
            return;
        }

        // Create a new TripleDES key.
        TripleDESCryptoServiceProvider tDESkey = new TripleDESCryptoServiceProvider();

        try
        {
            // Encrypt the "creditcard" element.
            Encrypt(xmlDoc, "creditcard", tDESkey, "tDESKey");

            // Display the encrypted XML to the console.
            Console.WriteLine("Encrypted XML:");
            Console.WriteLine();
            Console.WriteLine(xmlDoc.OuterXml);

            // Decrypt the "creditcard" element.
            Decrypt(xmlDoc, tDESkey, "tDESKey");

            // Display the encrypted XML to the console.
            Console.WriteLine();
            Console.WriteLine("Decrypted XML:");
            Console.WriteLine();
            Console.WriteLine(xmlDoc.OuterXml);
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
        finally
        {
            // Clear the TripleDES key.
            tDESkey.Clear();
        }
    }

    public static void Encrypt(XmlDocument Doc, string ElementToEncrypt, SymmetricAlgorithm Alg, string KeyName)
    {
        // Check the arguments.
        if (Doc == null)
            throw new ArgumentNullException("Doc");
        if (ElementToEncrypt == null)
            throw new ArgumentNullException("ElementToEncrypt");
        if (Alg == null)
            throw new ArgumentNullException("Alg");

        ////////////////////////////////////////////////
        // Find the specified element in the XmlDocument
        // object and create a new XmlElemnt object.
        ////////////////////////////////////////////////

        XmlElement elementToEncrypt = Doc.GetElementsByTagName(ElementToEncrypt)[0] as XmlElement;

        // Throw an XmlException if the element was not found.
        if (elementToEncrypt == null)
        {
            throw new XmlException("The specified element was not found");
        }

        //////////////////////////////////////////////////
        // Create a new instance of the EncryptedXml class
        // and use it to encrypt the XmlElement with the
        // symmetric key.
        //////////////////////////////////////////////////

        EncryptedXml eXml = new EncryptedXml();

        byte[] encryptedElement = eXml.EncryptData(elementToEncrypt, Alg, false);

        ////////////////////////////////////////////////
        // Construct an EncryptedData object and populate
        // it with the desired encryption information.
        ////////////////////////////////////////////////

        EncryptedData edElement = new EncryptedData();
        edElement.Type = EncryptedXml.XmlEncElementUrl;

        // Create an EncryptionMethod element so that the
        // receiver knows which algorithm to use for decryption.
        // Determine what kind of algorithm is being used and
        // supply the appropriate URL to the EncryptionMethod element.

        string encryptionMethod = null;

        if (Alg is TripleDES)
        {
            encryptionMethod = EncryptedXml.XmlEncTripleDESUrl;
        }
        else if (Alg is DES)
        {
            encryptionMethod = EncryptedXml.XmlEncDESUrl;
        }
        else if (Alg is Aes)
        {
            switch (Alg.KeySize)
            {
                case 128:
                    encryptionMethod = EncryptedXml.XmlEncAES128Url;
                    break;
                case 192:
                    encryptionMethod = EncryptedXml.XmlEncAES192Url;
                    break;
                case 256:
                    encryptionMethod = EncryptedXml.XmlEncAES256Url;
                    break;
            }
        }
        else
        {
            // Throw an exception if the transform is not in the previous categories
            throw new CryptographicException("The specified algorithm is not supported for XML Encryption.");
        }

        edElement.EncryptionMethod = new EncryptionMethod(encryptionMethod);

        // Set the KeyInfo element to specify the
        // name of a key.

        // Create a new KeyInfo element.
        edElement.KeyInfo = new KeyInfo();

        // Create a new KeyInfoName element.
        KeyInfoName kin = new KeyInfoName();

        // Specify a name for the key.
        kin.Value = KeyName;

        // Add the KeyInfoName element.
        edElement.KeyInfo.AddClause(kin);

        // Add the encrypted element data to the
        // EncryptedData object.
        edElement.CipherData.CipherValue = encryptedElement;

        ////////////////////////////////////////////////////
        // Replace the element from the original XmlDocument
        // object with the EncryptedData element.
        ////////////////////////////////////////////////////

        EncryptedXml.ReplaceElement(elementToEncrypt, edElement, false);
    }

    public static void Decrypt(XmlDocument Doc, SymmetricAlgorithm Alg, string KeyName)
    {
        // Check the arguments.
        if (Doc == null)
            throw new ArgumentNullException("Doc");
        if (Alg == null)
            throw new ArgumentNullException("Alg");
        if (KeyName == null)
            throw new ArgumentNullException("KeyName");

        // Create a new EncryptedXml object.
        EncryptedXml exml = new EncryptedXml(Doc);

        // Add a key-name mapping.
        // This method can only decrypt documents
        // that present the specified key name.
        exml.AddKeyNameMapping(KeyName, Alg);

        // Decrypt the element.
        exml.DecryptDocument();
    }
}
Imports System.Xml
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml



Module Program

    Sub Main(ByVal args() As String)

        ' Create an XmlDocument object.
        Dim xmlDoc As New XmlDocument()

        ' Load an XML file into the XmlDocument object.
        Try
            xmlDoc.PreserveWhitespace = True
            xmlDoc.Load("test.xml")
        Catch e As Exception
            Console.WriteLine(e.Message)
            Return
        End Try

        ' Create a new TripleDES key. 
        Dim tDESkey As New TripleDESCryptoServiceProvider()


        Try
            ' Encrypt the "creditcard" element.
            Encrypt(xmlDoc, "creditcard", tDESkey, "tDESKey")

            ' Display the encrypted XML to the console.
            Console.WriteLine("Encrypted XML:")
            Console.WriteLine()
            Console.WriteLine(xmlDoc.OuterXml)

            ' Decrypt the "creditcard" element.
            Decrypt(xmlDoc, tDESkey, "tDESKey")

            ' Display the encrypted XML to the console.
            Console.WriteLine()
            Console.WriteLine("Decrypted XML:")
            Console.WriteLine()
            Console.WriteLine(xmlDoc.OuterXml)
        Catch e As Exception
            Console.WriteLine(e.Message)
        Finally
            ' Clear the TripleDES key.
            tDESkey.Clear()
        End Try

    End Sub


    Sub Encrypt(ByVal Doc As XmlDocument, ByVal ElementToEncrypt As String, ByVal Alg As SymmetricAlgorithm, ByVal KeyName As String)
        ' Check the arguments.  
        If Doc Is Nothing Then
            Throw New ArgumentNullException("Doc")
        End If
        If ElementToEncrypt Is Nothing Then
            Throw New ArgumentNullException("ElementToEncrypt")
        End If
        If Alg Is Nothing Then
            Throw New ArgumentNullException("Alg")
        End If
        '''''''''''''''''''''''''''''''''''''''''''''''''
        ' Find the specified element in the XmlDocument
        ' object and create a new XmlElemnt object.
        '''''''''''''''''''''''''''''''''''''''''''''''''
        Dim elementEncrypt As XmlElement = Doc.GetElementsByTagName(ElementToEncrypt)(0)
 

        ' Throw an XmlException if the element was not found.
        If elementToEncrypt Is Nothing Then
            Throw New XmlException("The specified element was not found")
        End If

        '''''''''''''''''''''''''''''''''''''''''''''''''
        ' Create a new instance of the EncryptedXml class 
        ' and use it to encrypt the XmlElement with the 
        ' symmetric key.
        '''''''''''''''''''''''''''''''''''''''''''''''''
        Dim eXml As New EncryptedXml()

        Dim encryptedElement As Byte() = eXml.EncryptData(elementEncrypt, Alg, False)

        '''''''''''''''''''''''''''''''''''''''''''''''''
        ' Construct an EncryptedData object and populate
        ' it with the desired encryption information.
        '''''''''''''''''''''''''''''''''''''''''''''''''

        Dim edElement As New EncryptedData()
        edElement.Type = EncryptedXml.XmlEncElementUrl

        ' Create an EncryptionMethod element so that the 
        ' receiver knows which algorithm to use for decryption.
        ' Determine what kind of algorithm is being used and
        ' supply the appropriate URL to the EncryptionMethod element.
        Dim encryptionMethod As String = Nothing

        If TypeOf Alg Is TripleDES Then
            encryptionMethod = EncryptedXml.XmlEncTripleDESUrl
        ElseIf TypeOf Alg Is DES Then
            encryptionMethod = EncryptedXml.XmlEncDESUrl
        ElseIf TypeOf Alg Is Aes Then
            Select Case Alg.KeySize
                Case 128
                    encryptionMethod = EncryptedXml.XmlEncAES128Url
                Case 192
                    encryptionMethod = EncryptedXml.XmlEncAES192Url
                Case 256
                    encryptionMethod = EncryptedXml.XmlEncAES256Url
            End Select
        Else
            ' Throw an exception if the transform is not in the previous categories
            Throw New CryptographicException("The specified algorithm is not supported for XML Encryption.")
        End If

        edElement.EncryptionMethod = New EncryptionMethod(encryptionMethod)

        ' Set the KeyInfo element to specify the
        ' name of a key.
        ' Create a new KeyInfo element.
        edElement.KeyInfo = New KeyInfo()

        ' Create a new KeyInfoName element.
        Dim kin As New KeyInfoName()

        ' Specify a name for the key.
        kin.Value = KeyName

        ' Add the KeyInfoName element.
        edElement.KeyInfo.AddClause(kin)

        ' Add the encrypted element data to the 
        ' EncryptedData object.
        edElement.CipherData.CipherValue = encryptedElement

        '''''''''''''''''''''''''''''''''''''''''''''''''
        ' Replace the element from the original XmlDocument
        ' object with the EncryptedData element.
        '''''''''''''''''''''''''''''''''''''''''''''''''
        EncryptedXml.ReplaceElement(elementEncrypt, edElement, False)

    End Sub


    Sub Decrypt(ByVal Doc As XmlDocument, ByVal Alg As SymmetricAlgorithm, ByVal KeyName As String)
        ' Check the arguments.  
        If Doc Is Nothing Then
            Throw New ArgumentNullException("Doc")
        End If
        If Alg Is Nothing Then
            Throw New ArgumentNullException("Alg")
        End If
        If KeyName Is Nothing Then
            Throw New ArgumentNullException("KeyName")
        End If
        ' Create a new EncryptedXml object.
        Dim exml As New EncryptedXml(Doc)

        ' Add a key-name mapping.
        ' This method can only decrypt documents
        ' that present the specified key name.
        exml.AddKeyNameMapping(KeyName, Alg)

        ' Decrypt the element.
        exml.DecryptDocument()

    End Sub
End Module

Aşağıdaki kod örneği, bir XML belgesinin asimetrik anahtar kullanarak nasıl şifreleyileceğini gösterir. Bu örnek, belgeyi şifrelemek için simetrik bir oturum anahtarı oluşturur ve ardından oturum anahtarının şifrelenmiş bir sürümünü XML belgesine eklemek için asimetrik anahtarı kullanır.

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

using namespace System;
using namespace System::Xml;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::Xml;
static void Encrypt( XmlDocument^ Doc, String^ ElementToEncrypt, RSA^ Alg, String^ KeyName )
{

   // Check the arguments.
   if ( Doc == nullptr )
      throw gcnew ArgumentNullException( L"Doc" );

   if ( ElementToEncrypt == nullptr )
      throw gcnew ArgumentNullException( L"ElementToEncrypt" );

   if ( Alg == nullptr )
      throw gcnew ArgumentNullException( L"Alg" );


   ////////////////////////////////////////////////
   // Find the specified element in the XmlDocument
   // object and create a new XmlElemnt object.
   ////////////////////////////////////////////////
   XmlElement^ elementToEncrypt = dynamic_cast<XmlElement^>(Doc->GetElementsByTagName( ElementToEncrypt )->Item( 0 ));

   // Throw an XmlException if the element was not found.
   if ( elementToEncrypt == nullptr )
   {
      throw gcnew XmlException( L"The specified element was not found" );
   }


   //////////////////////////////////////////////////
   // Create a new instance of the EncryptedXml class
   // and use it to encrypt the XmlElement with the
   // a new random symmetric key.
   //////////////////////////////////////////////////
   // Create a 256 bit Aes key.
   Aes^ sessionKey = Aes::Create();
   sessionKey->KeySize = 256;
   EncryptedXml^ eXml = gcnew EncryptedXml;
   array<Byte>^encryptedElement = eXml->EncryptData( elementToEncrypt, sessionKey, false );

   ////////////////////////////////////////////////
   // Construct an EncryptedData object and populate
   // it with the desired encryption information.
   ////////////////////////////////////////////////
   EncryptedData^ edElement = gcnew EncryptedData;
   edElement->Type = EncryptedXml::XmlEncElementUrl;

   // Create an EncryptionMethod element so that the
   // receiver knows which algorithm to use for decryption.
   edElement->EncryptionMethod = gcnew EncryptionMethod( EncryptedXml::XmlEncAES256Url );

   // Encrypt the session key and add it to an EncryptedKey element.
   EncryptedKey^ ek = gcnew EncryptedKey;
   array<Byte>^encryptedKey = EncryptedXml::EncryptKey( sessionKey->Key, Alg, false );
   ek->CipherData = gcnew CipherData( encryptedKey );
   ek->EncryptionMethod = gcnew EncryptionMethod( EncryptedXml::XmlEncRSA15Url );

   // Set the KeyInfo element to specify the
   // name of the RSA key.
   // Create a new KeyInfo element.
   edElement->KeyInfo = gcnew KeyInfo;

   // Create a new KeyInfoName element.
   KeyInfoName^ kin = gcnew KeyInfoName;

   // Specify a name for the key.
   kin->Value = KeyName;

   // Add the KeyInfoName element to the
   // EncryptedKey object.
   ek->KeyInfo->AddClause( kin );

   // Add the encrypted key to the
   // EncryptedData object.
   edElement->KeyInfo->AddClause( gcnew KeyInfoEncryptedKey( ek ) );

   // Add the encrypted element data to the
   // EncryptedData object.
   edElement->CipherData->CipherValue = encryptedElement;

   ////////////////////////////////////////////////////
   // Replace the element from the original XmlDocument
   // object with the EncryptedData element.
   ////////////////////////////////////////////////////
   EncryptedXml::ReplaceElement( elementToEncrypt, edElement, false );
}

static void Decrypt( XmlDocument^ Doc, RSA^ Alg, String^ KeyName )
{

   // Check the arguments.
   if ( Doc == nullptr )
      throw gcnew ArgumentNullException( L"Doc" );

   if ( Alg == nullptr )
      throw gcnew ArgumentNullException( L"Alg" );

   if ( KeyName == nullptr )
      throw gcnew ArgumentNullException( L"KeyName" );


   // Create a new EncryptedXml object.
   EncryptedXml^ exml = gcnew EncryptedXml( Doc );

   // Add a key-name mapping.
   // This method can only decrypt documents
   // that present the specified key name.
   exml->AddKeyNameMapping( KeyName, Alg );

   // Decrypt the element.
   exml->DecryptDocument();
}

int main()
{

   // Create an XmlDocument object.
   XmlDocument^ xmlDoc = gcnew XmlDocument;

   // Load an XML file into the XmlDocument object.
   try
   {
      xmlDoc->PreserveWhitespace = true;
      xmlDoc->Load( L"test.xml" );
   }
   catch ( Exception^ e )
   {
      Console::WriteLine( e->Message );
      return 0;
   }


   // Create a new RSA key.  This key will encrypt a symmetric key,
   // which will then be imbedded in the XML document.
   RSA^ rsaKey = RSA::Create();
   try
   {

      // Encrypt the "creditcard" element.
      Encrypt( xmlDoc, L"creditcard", rsaKey, L"rsaKey" );

      // Display the encrypted XML to the console.
      Console::WriteLine( L"Encrypted XML:" );
      Console::WriteLine();
      Console::WriteLine( xmlDoc->OuterXml );
      xmlDoc->Save( L"test.xml" );

      // Decrypt the "creditcard" element.
      Decrypt( xmlDoc, rsaKey, L"rsaKey" );

      // Display the encrypted XML to the console.
      Console::WriteLine();
      Console::WriteLine( L"Decrypted XML:" );
      Console::WriteLine();
      Console::WriteLine( xmlDoc->OuterXml );
      xmlDoc->Save( L"test.xml" );
   }
   catch ( Exception^ e )
   {
      Console::WriteLine( e->Message );
   }
   finally
   {

      // Clear the RSA key.
      rsaKey->Clear();
   }

   return 1;
}
using System;
using System.Xml;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;

class Program
{
    static void Main(string[] args)
    {

        // Create an XmlDocument object.
        XmlDocument xmlDoc = new XmlDocument();

        // Load an XML file into the XmlDocument object.
        try
        {
            xmlDoc.PreserveWhitespace = true;
            xmlDoc.Load("test.xml");
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
            return;
        }

        // Create a new RSA key.  This key will encrypt a symmetric key,
        // which will then be imbedded in the XML document.
        RSA rsaKey = RSA.Create();

        try
        {
            // Encrypt the "creditcard" element.
            Encrypt(xmlDoc, "creditcard", rsaKey, "rsaKey");

            // Display the encrypted XML to the console.
            Console.WriteLine("Encrypted XML:");
            Console.WriteLine();
            Console.WriteLine(xmlDoc.OuterXml);
            xmlDoc.Save("test.xml");

            // Decrypt the "creditcard" element.
            Decrypt(xmlDoc, rsaKey, "rsaKey");
            xmlDoc.Save("test.xml");

            // Display the encrypted XML to the console.
            Console.WriteLine();
            Console.WriteLine("Decrypted XML:");
            Console.WriteLine();
            Console.WriteLine(xmlDoc.OuterXml);
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
        finally
        {
            // Clear the RSA key.
            rsaKey.Clear();
        }
    }

    public static void Encrypt(XmlDocument Doc, string ElementToEncrypt, RSA Alg, string KeyName)
    {
        // Check the arguments.
        if (Doc == null)
            throw new ArgumentNullException("Doc");
        if (ElementToEncrypt == null)
            throw new ArgumentNullException("ElementToEncrypt");
        if (Alg == null)
            throw new ArgumentNullException("Alg");

        ////////////////////////////////////////////////
        // Find the specified element in the XmlDocument
        // object and create a new XmlElemnt object.
        ////////////////////////////////////////////////

        XmlElement elementToEncrypt = Doc.GetElementsByTagName(ElementToEncrypt)[0] as XmlElement;

        // Throw an XmlException if the element was not found.
        if (elementToEncrypt == null)
        {
            throw new XmlException("The specified element was not found");
        }

        //////////////////////////////////////////////////
        // Create a new instance of the EncryptedXml class
        // and use it to encrypt the XmlElement with the
        // a new random symmetric key.
        //////////////////////////////////////////////////

        // Create a 256 bit Aes key.
        Aes sessionKey = Aes.Create();
        sessionKey.KeySize = 256;

        EncryptedXml eXml = new EncryptedXml();

        byte[] encryptedElement = eXml.EncryptData(elementToEncrypt, sessionKey, false);

        ////////////////////////////////////////////////
        // Construct an EncryptedData object and populate
        // it with the desired encryption information.
        ////////////////////////////////////////////////

        EncryptedData edElement = new EncryptedData();
        edElement.Type = EncryptedXml.XmlEncElementUrl;

        // Create an EncryptionMethod element so that the
        // receiver knows which algorithm to use for decryption.

        edElement.EncryptionMethod = new EncryptionMethod(EncryptedXml.XmlEncAES256Url);

        // Encrypt the session key and add it to an EncryptedKey element.
        EncryptedKey ek = new EncryptedKey();

        byte[] encryptedKey = EncryptedXml.EncryptKey(sessionKey.Key, Alg, false);

        ek.CipherData = new CipherData(encryptedKey);

        ek.EncryptionMethod = new EncryptionMethod(EncryptedXml.XmlEncRSA15Url);

        // Set the KeyInfo element to specify the
        // name of the RSA key.

        // Create a new KeyInfo element.
        edElement.KeyInfo = new KeyInfo();

        // Create a new KeyInfoName element.
        KeyInfoName kin = new KeyInfoName();

        // Specify a name for the key.
        kin.Value = KeyName;

        // Add the KeyInfoName element to the
        // EncryptedKey object.
        ek.KeyInfo.AddClause(kin);

        // Add the encrypted key to the
        // EncryptedData object.

        edElement.KeyInfo.AddClause(new KeyInfoEncryptedKey(ek));

        // Add the encrypted element data to the
        // EncryptedData object.
        edElement.CipherData.CipherValue = encryptedElement;

        ////////////////////////////////////////////////////
        // Replace the element from the original XmlDocument
        // object with the EncryptedData element.
        ////////////////////////////////////////////////////

        EncryptedXml.ReplaceElement(elementToEncrypt, edElement, false);
    }

    public static void Decrypt(XmlDocument Doc, RSA Alg, string KeyName)
    {
        // Check the arguments.
        if (Doc == null)
            throw new ArgumentNullException("Doc");
        if (Alg == null)
            throw new ArgumentNullException("Alg");
        if (KeyName == null)
            throw new ArgumentNullException("KeyName");

        // Create a new EncryptedXml object.
        EncryptedXml exml = new EncryptedXml(Doc);

        // Add a key-name mapping.
        // This method can only decrypt documents
        // that present the specified key name.
        exml.AddKeyNameMapping(KeyName, Alg);

        // Decrypt the element.
        exml.DecryptDocument();
    }
}
Imports System.Xml
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml



Module Program

    Sub Main(ByVal args() As String)

        ' Create an XmlDocument object.
        Dim xmlDoc As New XmlDocument()

        ' Load an XML file into the XmlDocument object.
        Try
            xmlDoc.PreserveWhitespace = True
            xmlDoc.Load("test.xml")
        Catch e As Exception
            Console.WriteLine(e.Message)
            Return
        End Try

        ' Create a new RSA key.  This key will encrypt a symmetric key,
        ' which will then be imbedded in the XML document.  
        Dim rsaKey = RSA = RSA.Create()


        Try
            ' Encrypt the "creditcard" element.
            Encrypt(xmlDoc, "creditcard", rsaKey, "rsaKey")

            ' Display the encrypted XML to the console.
            Console.WriteLine("Encrypted XML:")
            Console.WriteLine()
            Console.WriteLine(xmlDoc.OuterXml)
            xmlDoc.Save("test.xml")

            ' Decrypt the "creditcard" element.
            Decrypt(xmlDoc, rsaKey, "rsaKey")

            ' Display the encrypted XML to the console.
            Console.WriteLine()
            Console.WriteLine("Decrypted XML:")
            Console.WriteLine()
            Console.WriteLine(xmlDoc.OuterXml)
            xmlDoc.Save("test.xml")
        Catch e As Exception
            Console.WriteLine(e.Message)
        Finally
            ' Clear the RSA key.
            rsaKey.Clear()
        End Try

    End Sub


    Sub Encrypt(ByVal Doc As XmlDocument, ByVal ElementToEncrypt As String, ByVal Alg As RSA, ByVal KeyName As String)
        ' Check the arguments.  
        If Doc Is Nothing Then
            Throw New ArgumentNullException("Doc")
        End If
        If ElementToEncrypt Is Nothing Then
            Throw New ArgumentNullException("ElementToEncrypt")
        End If
        If Alg Is Nothing Then
            Throw New ArgumentNullException("Alg")
        End If
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Find the specified element in the XmlDocument
        ' object and create a new XmlElemnt object.
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        Dim elementEncrypt As XmlElement = Doc.GetElementsByTagName(ElementToEncrypt)(0)

        ' Throw an XmlException if the element was not found.
        If elementToEncrypt Is Nothing Then
            Throw New XmlException("The specified element was not found")
        End If

        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Create a new instance of the EncryptedXml class 
        ' and use it to encrypt the XmlElement with the 
        ' a new random symmetric key.
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Create a 256 bit Aes key.
        Dim sessionKey As Aes = Aes.Create()
        sessionKey.KeySize = 256

        Dim eXml As New EncryptedXml()

        Dim encryptedElement As Byte() = eXml.EncryptData(elementEncrypt, sessionKey, False)

        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Construct an EncryptedData object and populate
        ' it with the desired encryption information.
        '''''''''''''''''''''''''''''''''''''''''''''''''''

        Dim edElement As New EncryptedData()
        edElement.Type = EncryptedXml.XmlEncElementUrl

        ' Create an EncryptionMethod element so that the 
        ' receiver knows which algorithm to use for decryption.
        edElement.EncryptionMethod = New EncryptionMethod(EncryptedXml.XmlEncAES256Url)

        ' Encrypt the session key and add it to an EncryptedKey element.
        Dim ek As New EncryptedKey()

        Dim encryptedKey As Byte() = EncryptedXml.EncryptKey(sessionKey.Key, Alg, False)

        ek.CipherData = New CipherData(encryptedKey)

        ek.EncryptionMethod = New EncryptionMethod(EncryptedXml.XmlEncRSA15Url)

        ' Set the KeyInfo element to specify the
        ' name of the RSA key.
        ' Create a new KeyInfo element.
        edElement.KeyInfo = New KeyInfo()

        ' Create a new KeyInfoName element.
        Dim kin As New KeyInfoName()

        ' Specify a name for the key.
        kin.Value = KeyName

        ' Add the KeyInfoName element to the 
        ' EncryptedKey object.
        ek.KeyInfo.AddClause(kin)

        ' Add the encrypted key to the 
        ' EncryptedData object.
        edElement.KeyInfo.AddClause(New KeyInfoEncryptedKey(ek))

        ' Add the encrypted element data to the 
        ' EncryptedData object.
        edElement.CipherData.CipherValue = encryptedElement

        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Replace the element from the original XmlDocument
        ' object with the EncryptedData element.
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        EncryptedXml.ReplaceElement(elementEncrypt, edElement, False)

    End Sub


    Sub Decrypt(ByVal Doc As XmlDocument, ByVal Alg As RSA, ByVal KeyName As String)
        ' Check the arguments.  
        If Doc Is Nothing Then
            Throw New ArgumentNullException("Doc")
        End If
        If Alg Is Nothing Then
            Throw New ArgumentNullException("Alg")
        End If
        If KeyName Is Nothing Then
            Throw New ArgumentNullException("KeyName")
        End If
        ' Create a new EncryptedXml object.
        Dim exml As New EncryptedXml(Doc)

        ' Add a key-name mapping.
        ' This method can only decrypt documents
        ' that present the specified key name.
        exml.AddKeyNameMapping(KeyName, Alg)

        ' Decrypt the element.
        exml.DecryptDocument()

    End Sub
End Module

Aşağıdaki kod örneğinde, X.509 sertifikası kullanarak XML belgesinin nasıl şifrelenmesi gösterilmektedir. Bu örnek, belgeyi şifrelemek için bir simetrik oturum anahtarı oluşturur ve ardından oturum anahtarının şifrelenmiş bir sürümünü XML belgesine eklemek için X.509 sertifikasını kullanır.

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

using namespace System;
using namespace System::Xml;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::Xml;
using namespace System::Security::Cryptography::X509Certificates;
static void Encrypt( XmlDocument^ Doc, String^ ElementToEncrypt, X509Certificate2^ Cert )
{

   // Check the arguments.
   if ( Doc == nullptr )
      throw gcnew ArgumentNullException( L"Doc" );

   if ( ElementToEncrypt == nullptr )
      throw gcnew ArgumentNullException( L"ElementToEncrypt" );

   if ( Cert == nullptr )
      throw gcnew ArgumentNullException( L"Cert" );


   ////////////////////////////////////////////////
   // Find the specified element in the XmlDocument
   // object and create a new XmlElemnt object.
   ////////////////////////////////////////////////
   XmlElement^ elementToEncrypt = dynamic_cast<XmlElement^>(Doc->GetElementsByTagName( ElementToEncrypt )->Item( 0 ));

   // Throw an XmlException if the element was not found.
   if ( elementToEncrypt == nullptr )
   {
      throw gcnew XmlException( L"The specified element was not found" );
   }


   //////////////////////////////////////////////////
   // Create a new instance of the EncryptedXml class
   // and use it to encrypt the XmlElement with the
   // X.509 Certificate.
   //////////////////////////////////////////////////
   EncryptedXml^ eXml = gcnew EncryptedXml;

   // Encrypt the element.
   EncryptedData^ edElement = eXml->Encrypt( elementToEncrypt, Cert );

   ////////////////////////////////////////////////////
   // Replace the element from the original XmlDocument
   // object with the EncryptedData element.
   ////////////////////////////////////////////////////
   EncryptedXml::ReplaceElement( elementToEncrypt, edElement, false );
}

static void Decrypt( XmlDocument^ Doc )
{

   // Check the arguments.
   if ( Doc == nullptr )
      throw gcnew ArgumentNullException( L"Doc" );


   // Create a new EncryptedXml object.
   EncryptedXml^ exml = gcnew EncryptedXml( Doc );

   // Decrypt the XML document.
   exml->DecryptDocument();
}

int main()
{

   // Create an XmlDocument object.
   XmlDocument^ xmlDoc = gcnew XmlDocument;

   // Load an XML file into the XmlDocument object.
   try
   {
      xmlDoc->PreserveWhitespace = true;
      xmlDoc->Load( L"test.xml" );
   }
   catch ( Exception^ e )
   {
      Console::WriteLine( e->Message );
      return 0;
   }


   // Create a new X509Certificate2 object by loading
   // an X.509 certificate file.  To use XML encryption
   // with an X.509 certificate, use an X509Certificate2
   // object to encrypt, but use a certificate in a certificate
   // store to decrypt.
   // You can create a new test certificate file using the
   // makecert.exe tool.
   // Create an X509Certificate2 object for encryption.
   X509Certificate2^ cert = gcnew X509Certificate2( L"test.pfx" );

   // Put the certificate in certificate store for decryption.
   X509Store^ store = gcnew X509Store( StoreLocation::CurrentUser );
   store->Open( OpenFlags::ReadWrite );
   store->Add( cert );
   store->Close();
   try
   {

      // Encrypt the "creditcard" element.
      Encrypt( xmlDoc, L"creditcard", cert );

      // Display the encrypted XML to the console.
      Console::WriteLine( L"Encrypted XML:" );
      Console::WriteLine();
      Console::WriteLine( xmlDoc->OuterXml );

      // Decrypt the "creditcard" element.
      Decrypt( xmlDoc );

      // Display the encrypted XML to the console.
      Console::WriteLine();
      Console::WriteLine( L"Decrypted XML:" );
      Console::WriteLine();
      Console::WriteLine( xmlDoc->OuterXml );
   }
   catch ( Exception^ e )
   {
      Console::WriteLine( e->Message );
   }

   return 1;
}
using System;
using System.Xml;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Security.Cryptography.X509Certificates;

class Program
{
    static void Main(string[] args)
    {

        // Create an XmlDocument object.
        XmlDocument xmlDoc = new XmlDocument();

        // Load an XML file into the XmlDocument object.
        try
        {
            xmlDoc.PreserveWhitespace = true;
            xmlDoc.Load("test.xml");
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
            return;
        }

        // Create a new X509Certificate2 object by loading
        // an X.509 certificate file.  To use XML encryption
        // with an X.509 certificate, use an X509Certificate2
        // object to encrypt, but use a certificate in a certificate
        // store to decrypt.

        // You can create a new test certificate file using the
        // makecert.exe tool.

        // Create an X509Certificate2 object for encryption.
        X509Certificate2 cert = new X509Certificate2("test.pfx");

        // Put the certificate in certificate store for decryption.
        X509Store store = new X509Store(StoreLocation.CurrentUser);

        store.Open(OpenFlags.ReadWrite);

        store.Add(cert);

        store.Close();

        try
        {
            // Encrypt the "creditcard" element.
            Encrypt(xmlDoc, "creditcard", cert);

            // Display the encrypted XML to the console.
            Console.WriteLine("Encrypted XML:");
            Console.WriteLine();
            Console.WriteLine(xmlDoc.OuterXml);

            // Decrypt the "creditcard" element.
            Decrypt(xmlDoc);

            // Display the encrypted XML to the console.
            Console.WriteLine();
            Console.WriteLine("Decrypted XML:");
            Console.WriteLine();
            Console.WriteLine(xmlDoc.OuterXml);
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
    }

    public static void Encrypt(XmlDocument Doc, string ElementToEncrypt, X509Certificate2 Cert)
    {
        // Check the arguments.
        if (Doc == null)
            throw new ArgumentNullException("Doc");
        if (ElementToEncrypt == null)
            throw new ArgumentNullException("ElementToEncrypt");
        if (Cert == null)
            throw new ArgumentNullException("Cert");

        ////////////////////////////////////////////////
        // Find the specified element in the XmlDocument
        // object and create a new XmlElemnt object.
        ////////////////////////////////////////////////

        XmlElement elementToEncrypt = Doc.GetElementsByTagName(ElementToEncrypt)[0] as XmlElement;

        // Throw an XmlException if the element was not found.
        if (elementToEncrypt == null)
        {
            throw new XmlException("The specified element was not found");
        }

        //////////////////////////////////////////////////
        // Create a new instance of the EncryptedXml class
        // and use it to encrypt the XmlElement with the
        // X.509 Certificate.
        //////////////////////////////////////////////////

        EncryptedXml eXml = new EncryptedXml();

        // Encrypt the element.
        EncryptedData edElement = eXml.Encrypt(elementToEncrypt, Cert);

        ////////////////////////////////////////////////////
        // Replace the element from the original XmlDocument
        // object with the EncryptedData element.
        ////////////////////////////////////////////////////

        EncryptedXml.ReplaceElement(elementToEncrypt, edElement, false);
    }

    public static void Decrypt(XmlDocument Doc)
    {
        // Check the arguments.
        if (Doc == null)
            throw new ArgumentNullException("Doc");

        // Create a new EncryptedXml object.
        EncryptedXml exml = new EncryptedXml(Doc);

        // Decrypt the XML document.
        exml.DecryptDocument();
    }
}
Imports System.Xml
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.Security.Cryptography.X509Certificates



Module Program

    Sub Main(ByVal args() As String)

        ' Create an XmlDocument object.
        Dim xmlDoc As New XmlDocument()

        ' Load an XML file into the XmlDocument object.
        Try
            xmlDoc.PreserveWhitespace = True
            xmlDoc.Load("test.xml")
        Catch e As Exception
            Console.WriteLine(e.Message)
            Return
        End Try

        ' Create a new X509Certificate2 object by loading
        ' an X.509 certificate file.  To use XML encryption 
        ' with an X.509 certificate, use an X509Certificate2 
        ' object to encrypt, but use a certificate in a certificate
        ' store to decrypt.
        ' You can create a new test certificate file using the 
        ' makecert.exe tool.
        ' Create an X509Certificate2 object for encryption.
        Dim cert As New X509Certificate2("test.pfx")

        ' Put the certificate in certificate store for decryption.  
        Dim store As New X509Store(StoreLocation.CurrentUser)

        store.Open(OpenFlags.ReadWrite)

        store.Add(cert)

        store.Close()


        Try
            ' Encrypt the "creditcard" element.
            Encrypt(xmlDoc, "creditcard", cert)

            ' Display the encrypted XML to the console.
            Console.WriteLine("Encrypted XML:")
            Console.WriteLine()
            Console.WriteLine(xmlDoc.OuterXml)

            ' Decrypt the "creditcard" element.
            Decrypt(xmlDoc)

            ' Display the encrypted XML to the console.
            Console.WriteLine()
            Console.WriteLine("Decrypted XML:")
            Console.WriteLine()
            Console.WriteLine(xmlDoc.OuterXml)
        Catch e As Exception
            Console.WriteLine(e.Message)
        End Try

    End Sub


    Sub Encrypt(ByVal Doc As XmlDocument, ByVal ElementToEncrypt As String, ByVal Cert As X509Certificate2)
        ' Check the arguments.  
        If Doc Is Nothing Then
            Throw New ArgumentNullException("Doc")
        End If
        If ElementToEncrypt Is Nothing Then
            Throw New ArgumentNullException("ElementToEncrypt")
        End If
        If Cert Is Nothing Then
            Throw New ArgumentNullException("Cert")
        End If
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Find the specified element in the XmlDocument
        ' object and create a new XmlElemnt object.
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        Dim elementEncrypt As XmlElement = Doc.GetElementsByTagName(ElementToEncrypt)(0) 


        ' Throw an XmlException if the element was not found.
        If elementToEncrypt Is Nothing Then
            Throw New XmlException("The specified element was not found")
        End If

        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Create a new instance of the EncryptedXml class 
        ' and use it to encrypt the XmlElement with the 
        ' X.509 Certificate.
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        Dim eXml As New EncryptedXml()

        ' Encrypt the element.
        Dim edElement As EncryptedData = eXml.Encrypt(elementEncrypt, Cert)


        '''''''''''''''''''''''''''''''''''''''''''''''''''
        ' Replace the element from the original XmlDocument
        ' object with the EncryptedData element.
        '''''''''''''''''''''''''''''''''''''''''''''''''''
        EncryptedXml.ReplaceElement(elementEncrypt, edElement, False)

    End Sub


    Sub Decrypt(ByVal Doc As XmlDocument)
        ' Check the arguments.  
        If Doc Is Nothing Then
            Throw New ArgumentNullException("Doc")
        End If
        ' Create a new EncryptedXml object.
        Dim exml As New EncryptedXml(Doc)

        ' Decrypt the XML document.
        exml.DecryptDocument()

    End Sub
End Module

Açıklamalar

EncryptedXml sınıfı, .NET Framework XML şifrelemesi için kullanılan ana sınıftır. XML Şifrelemesi, xml belgesinin tamamını veya bir bölümünü ya da rastgele verileri şifrelemek için standartlara dayalı, birlikte çalışabilen bir yoldur. .NET Framework XML şifreleme sınıfları World Wide Web Konsorsiyumu (W3C) XML Şifreleme Söz Dizimi ve İşleme Sürüm 1.0 belirtimini uygular.

EncryptedXml Uygulamalar veya kuruluşlar arasında standart bir şekilde şifrelenmiş XML verileri paylaşmanız gerektiğinde sınıfını kullanın. Bu sınıf kullanılarak şifrelenen tüm verilerin şifresi, XML şifrelemesi için W3C belirtiminin herhangi bir uygulaması tarafından çözülebilir.

XML şifrelemesi, düz metin XML öğesinin veya belgenin <EncryptedData> yerini, düz metin XML'sinin veya rastgele verilerin şifrelenmiş (veya şifre metin) gösterimini içeren öğesiyle değiştirir. <EncryptedData> öğesi isteğe bağlı olarak şifre metninin şifresini çözecek bir anahtarın nerede bulunacağı ve düz metni şifrelemek için kullanılan şifreleme algoritması hakkında bilgi içerebilir.

<EncryptedKey> öğesi, stil ve kullanımdaki öğesine benzer<EncryptedData>, ancak öğenin değerinin <EncryptedData> şifresini çözecek bir anahtarı şifrelemenize izin verir. öğesinin ve öğesinin <EncryptedKey><EncryptedData> hiçbir zaman şifrelenmemiş anahtar içermeyeceğini unutmayın.

Anahtar bilgilerini değiştirmek için aşağıdaki yöntemlerden birini kullanın:

  • Hiçbir önemli bilgi eklemeyin. Bu seçeneği belirlerseniz, her iki tarafın da şifrelenmiş veri alışverişinde bulunmadan önce bir algoritma ve anahtar üzerinde anlaşmaya varması gerekir.

  • öğesinin Tekdüzen Kaynak Tanımlayıcısı (URI) özniteliğine anahtarın <RetrievalMethod> konumunu ekleyin. Her iki tarafın da önceden anahtar konumu üzerinde anlaşmaya varması ve bu konumun gizli tutulması gerekir.

  • öğesindeki <KeyName> bir anahtarla eşleyen bir dize adı ekleyin. Her iki tarafın da şifrelenmiş verileri değiştirmeden önce anahtar adı eşlemesi üzerinde anlaşmaya varması ve bu eşlemenin gizli tutulması gerekir.

  • öğesine şifrelenmiş bir anahtar <EncryptedKey> ekleyin. Her iki taraf da şifrelenmiş verileri değiştirmeden önce şifrelenmiş anahtarın şifresini çözen anahtar üzerinde anlaşmalıdır. İsteğe bağlı olarak, öğesindeki anahtarın şifresini çözecek anahtarın <EncryptedKey> adını veya konumunu ekleyebilirsiniz.

Oluşturucular

EncryptedXml()

EncryptedXml sınıfının yeni bir örneğini başlatır.

EncryptedXml(XmlDocument)

Belirtilen XML belgesini kullanarak sınıfının yeni bir örneğini EncryptedXml başlatır.

EncryptedXml(XmlDocument, Evidence)

Belirtilen XML belgesini ve kanıtını EncryptedXml kullanarak sınıfının yeni bir örneğini başlatır.

Alanlar

XmlEncAES128KeyWrapUrl

128 bit Gelişmiş Şifreleme Standardı (AES) Anahtar Sarmalama algoritması (Rijndael Anahtar Sarmalama algoritması olarak da bilinir) için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncAES128Url

128 bit Gelişmiş Şifreleme Standardı (AES) algoritması (Rijndael algoritması olarak da bilinir) için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncAES192KeyWrapUrl

192 bit Gelişmiş Şifreleme Standardı (AES) Anahtar Sarmalama algoritması (Rijndael Anahtar Sarmalama algoritması olarak da bilinir) için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncAES192Url

192 bit Gelişmiş Şifreleme Standardı (AES) algoritması (Rijndael algoritması olarak da bilinir) için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncAES256KeyWrapUrl

256 bit Gelişmiş Şifreleme Standardı (AES) Anahtar Sarmalama algoritması (Rijndael Anahtar Sarmalama algoritması olarak da bilinir) için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncAES256Url

256 bit Gelişmiş Şifreleme Standardı (AES) algoritması (Rijndael algoritması olarak da bilinir) için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncDESUrl

Dijital Şifreleme Standardı (DES) algoritması için ad alanı Tekdüzen Kaynak Tanımlayıcısı'nı (URI) temsil eder. Bu alan sabittir.

XmlEncElementContentUrl

XML şifreleme öğesi içeriği için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncElementUrl

XML şifreleme öğesi için ad alanı Tekdüzen Kaynak Tanımlayıcısı'nı (URI) temsil eder. Bu alan sabittir.

XmlEncEncryptedKeyUrl

XML şifreleme <EncryptedKey> öğesi için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncNamespaceUrl

XML şifreleme söz dizimi ve işleme için ad alanı Tekdüzen Kaynak Tanımlayıcısı'nı (URI) temsil eder. Bu alan sabittir.

XmlEncRSA15Url

RSA Ortak Anahtar Şifreleme Standardı (PKCS) Sürüm 1.5 algoritması için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncRSAOAEPUrl

RSA Optimal Asimetrik Şifreleme Doldurma (OAEP) şifreleme algoritması için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncSHA256Url

SHA-256 algoritması için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncSHA512Url

SHA-512 algoritması için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

XmlEncTripleDESKeyWrapUrl

TRIPLEDES anahtar sarmalama algoritması için ad alanı Tekdüzen Kaynak Tanımlayıcısı'nı (URI) temsil eder. Bu alan sabittir.

XmlEncTripleDESUrl

Üçlü DES algoritması için ad alanı Tekdüzen Kaynak Tanımlayıcısını (URI) temsil eder. Bu alan sabittir.

Özellikler

DocumentEvidence

Nesnenin oluşturulduğu nesnenin XmlDocument kanıtını EncryptedXml alır veya ayarlar.

Encoding

XML şifrelemesi için kullanılan kodlamayı alır veya ayarlar.

Mode

XML şifrelemesi için kullanılan şifreleme modunu alır veya ayarlar.

Padding

XML şifrelemesi için kullanılan doldurma modunu alır veya ayarlar.

Recipient

Şifrelenmiş anahtar bilgilerinin alıcısını alır veya ayarlar.

Resolver

Dış XML başvurularını çözümlemek XmlResolver için Belge Nesne Modeli (DOM) tarafından kullanılan nesneyi alır veya ayarlar.

XmlDSigSearchDepth

Sonsuz özyineleme ve yığın taşmasını önlemek için XML dijital imza özyineleme derinliğini alır veya ayarlar. Dijital imza XML'i özgün XML'ye işaret eden URI'yi içeriyorsa bu durum oluşabilir.

Yöntemler

AddKeyNameMapping(String, Object)

Anahtar adı ile simetrik anahtar veya asimetrik anahtar arasında eşleme tanımlar.

ClearKeyNameMappings()

Tüm anahtar adı eşlemesini sıfırlar.

DecryptData(EncryptedData, SymmetricAlgorithm)

Belirtilen simetrik algoritmayı kullanarak bir <EncryptedData> öğenin şifresini çözer.

DecryptDocument()

Sınıfın başlatılması sırasında belirtilen XML belgesinin tüm <EncryptedData> öğelerinin EncryptedXml şifresini çözer.

DecryptEncryptedKey(EncryptedKey)

öğesi tarafından EncryptedKey temsil edilen anahtarı belirler.

DecryptKey(Byte[], RSA, Boolean)

Asimetrik algoritma kullanarak bir <EncryptedKey> öğenin şifresini çözer.

DecryptKey(Byte[], SymmetricAlgorithm)

Simetrik algoritma kullanarak bir <EncryptedKey> öğenin şifresini çözer.

Encrypt(XmlElement, String)

Bir öğenin dış XML'sini anahtar eşleme tablosunda belirtilen anahtarı kullanarak şifreler.

Encrypt(XmlElement, X509Certificate2)

Belirtilen X.509 sertifikasını kullanarak öğenin dış XML'sini şifreler.

EncryptData(Byte[], SymmetricAlgorithm)

Belirtilen simetrik algoritmayı kullanarak belirtilen bayt dizisindeki verileri şifreler.

EncryptData(XmlElement, SymmetricAlgorithm, Boolean)

Belirtilen simetrik algoritmayı kullanarak belirtilen öğeyi veya içeriğini şifreler.

EncryptKey(Byte[], RSA, Boolean)

Alıcının bir öğenin şifresini çözmek <EncryptedData> için kullandığı anahtarı şifreler.

EncryptKey(Byte[], SymmetricAlgorithm)

Alıcının bir öğenin şifresini çözmek için kullandığı bir simetrik algoritma kullanarak anahtarı <EncryptedData> şifreler.

Equals(Object)

Belirtilen nesnenin geçerli nesneye eşit olup olmadığını belirler.

(Devralındığı yer: Object)
GetDecryptionIV(EncryptedData, String)

Bir EncryptedData nesneden şifre çözme başlatma vektörunu (IV) alır.

GetDecryptionKey(EncryptedData, String)

Belirtilen EncryptedData nesneden şifre çözme anahtarını alır.

GetHashCode()

Varsayılan karma işlevi işlevi görür.

(Devralındığı yer: Object)
GetIdElement(XmlDocument, String)

İç Tekdüzen Kaynak Tanımlayıcısı (URI) başvurularının nasıl çözümleneceğini belirler.

GetType()

Type Geçerli örneğini alır.

(Devralındığı yer: Object)
MemberwiseClone()

Geçerli Objectöğesinin sığ bir kopyasını oluşturur.

(Devralındığı yer: Object)
ReplaceData(XmlElement, Byte[])

Bir <EncryptedData> öğeyi belirtilen şifresi çözülmüş bayt dizisiyle değiştirir.

ReplaceElement(XmlElement, EncryptedData, Boolean)

Belirtilen öğeyi belirtilen EncryptedData nesneyle değiştirir.

ToString()

Geçerli nesneyi temsil eden dizeyi döndürür.

(Devralındığı yer: Object)

Şunlara uygulanır