CipherData Constructeurs

Définition

Espace de noms:

System.Security.Cryptography.Xml

Assembly:

System.Security.Cryptography.Xml.dll

Initialise une nouvelle instance de la classe CipherData.

Surcharges

CipherData()	Initialise une nouvelle instance de la classe CipherData.
CipherData(Byte[])	Initialise une nouvelle instance de la classe CipherData à l'aide d'un tableau d'octets comme valeur CipherValue.
CipherData(CipherReference)	Initialise une nouvelle instance de la classe CipherData à l'aide d'un objet CipherReference.

CipherData()

Initialise une nouvelle instance de la classe CipherData.

public:
 CipherData();

public CipherData ();

Public Sub New ()

Exemples

L'exemple suivant illustre la création d'une nouvelle instance de la classe CipherData. L’exemple entier se trouve dans la rubrique de classe CipherData .

// Create a new CipherData object.
CipherData^ cipher = gcnew CipherData();
// Assign a byte array to be the CipherValue. This is a
// byte array representing encrypted data.
cipher->CipherValue = gcnew array<Byte>(8);

// Create a new CipherData object.
CipherData cd = new CipherData();
// Assign a byte array to be the CipherValue. This is a byte array representing encrypted data.
cd.CipherValue = new byte[8];

' Create a new CipherData object.
Dim cd As New CipherData
' Assign a byte array to the CipherValue.
cd.CipherValue = New Byte(7) {}

Remarques

Ce constructeur crée un CipherData objet qui représente l’élément dans le <CipherData> chiffrement XML. L’élément <CipherData> est un élément obligatoire dans le chiffrement XML.

CipherData(Byte[])

Initialise une nouvelle instance de la classe CipherData à l'aide d'un tableau d'octets comme valeur CipherValue.

public:
 CipherData(cli::array <System::Byte> ^ cipherValue);

public CipherData (byte[] cipherValue);

new System.Security.Cryptography.Xml.CipherData : byte[] -> System.Security.Cryptography.Xml.CipherData

Public Sub New (cipherValue As Byte())

Paramètres

cipherValue

Byte[]

Données chiffrées à utiliser pour l'élément <CipherValue>.

Exceptions

ArgumentNullException

Le paramètre cipherValue a la valeur null.

CryptographicException

La propriété CipherValue a déjà été définie.

Exemples

L'exemple suivant illustre la création d'une nouvelle instance de la classe CipherData.

// Create a new CipherData object using a byte array to represent encrypted data.
array<Byte>^sampledata = gcnew array<Byte>(8);
CipherData ^ cd = gcnew CipherData( sampledata );

// Create a new CipherData object using a byte array to represent encrypted data.
Byte[] sampledata = new byte[8];
CipherData cd = new CipherData(sampledata);

    ' Create a new CipherData object using a byte array to represent encrypted data.
Dim sampledata(7) As Byte
    Dim cd As New CipherData(sampledata)

Remarques

Ce constructeur crée un CipherData objet qui représente l’élément dans le <CipherData> chiffrement XML. Le constructeur affecte la valeur à la cipherValueCipherValue propriété en tant que données chiffrées réelles.

Notes

L’élément <CipherData> peut avoir un CipherReference ou un CipherValue élément enfant, mais pas les deux. Un CryptographicException est levée si les deux sont affectés à un CipherData objet .

CipherData(CipherReference)

Initialise une nouvelle instance de la classe CipherData à l'aide d'un objet CipherReference.

public:
 CipherData(System::Security::Cryptography::Xml::CipherReference ^ cipherReference);

public CipherData (System.Security.Cryptography.Xml.CipherReference cipherReference);

new System.Security.Cryptography.Xml.CipherData : System.Security.Cryptography.Xml.CipherReference -> System.Security.Cryptography.Xml.CipherData

Public Sub New (cipherReference As CipherReference)

Paramètres

cipherReference

CipherReference

L'objet CipherReference à utiliser.

Exceptions

ArgumentNullException

Le paramètre cipherValue a la valeur null.

CryptographicException

La propriété CipherValue a déjà été définie.

Exemples

L’exemple de code suivant montre comment créer un instance de la classe à l’aide CipherDataCipherReference d’informations.

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

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

/// This sample used the EncryptedData class to create an encrypted data element
/// and write it to an XML file. It demonstrates the use of CipherReference.

[STAThread]
int main()
{
   
   //Create a URI string.
   String^ uri = "http://www.woodgrovebank.com/document.xml";
   
   // Create a Base64 transform. The input content retrieved from the
   // URI should be Base64-decoded before other processing.
   Transform^ base64 = gcnew XmlDsigBase64Transform;
   
   //Create a transform chain and add the transform to it.
   TransformChain^ tc = gcnew TransformChain;
   tc->Add( base64 );
   
   //Create <CipherReference> information.
   CipherReference ^ reference = gcnew CipherReference( uri,tc );
   
   // Create a new CipherData object using the CipherReference information.
   // Note that you cannot assign both a CipherReference and a CipherValue
   // to a CipherData object.
   CipherData ^ cd = gcnew CipherData( reference );
   
   // Create a new EncryptedData object.
   EncryptedData^ ed = gcnew EncryptedData;
   
   //Add an encryption method to the object.
   ed->Id = "ED";
   ed->EncryptionMethod = gcnew EncryptionMethod( "http://www.w3.org/2001/04/xmlenc#aes128-cbc" );
   ed->CipherData = cd;
   
   //Add key information to the object.
   KeyInfo^ ki = gcnew KeyInfo;
   ki->AddClause( gcnew KeyInfoRetrievalMethod( "#EK","http://www.w3.org/2001/04/xmlenc#EncryptedKey" ) );
   ed->KeyInfo = ki;
   
   // Create new XML document and put encrypted data into it.
   XmlDocument^ doc = gcnew XmlDocument;
   XmlElement^ encryptionPropertyElement = dynamic_cast<XmlElement^>(doc->CreateElement( "EncryptionProperty", EncryptedXml::XmlEncNamespaceUrl ));
   EncryptionProperty ^ ep = gcnew EncryptionProperty( encryptionPropertyElement );
   ed->AddProperty( ep );
   
   // Output the resulting XML information into a file.
   try
   {
      String^ path = "c:\\test\\MyTest.xml";
      File::WriteAllText( path, ed->GetXml()->OuterXml );
   }
   catch ( IOException^ e ) 
   {
      Console::WriteLine( "File IO error. {0}", e );
   }

}

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

/// This sample used the EncryptedData class to create an encrypted data element
/// and write it to an XML file. It demonstrates the use of CipherReference.
namespace EncryptedDataSample
{
    class Example
    {
        [STAThread]
        static void Main(string[] args)
        {
            //Create a URI string.
            String uri = "http://www.woodgrovebank.com/document.xml";
            // Create a Base64 transform. The input content retrieved from the
            // URI should be Base64-decoded before other processing.
            Transform base64 = new XmlDsigBase64Transform();
            //Create a transform chain and add the transform to it.
            TransformChain tc = new TransformChain();
            tc.Add(base64);
            //Create <CipherReference> information.
            CipherReference reference = new CipherReference(uri, tc);

            // Create a new CipherData object using the CipherReference information.
            // Note that you cannot assign both a CipherReference and a CipherValue
            // to a CipherData object.
            CipherData cd = new CipherData(reference);

            // Create a new EncryptedData object.
            EncryptedData ed = new EncryptedData();

            //Add an encryption method to the object.
            ed.Id = "ED";
            ed.EncryptionMethod = new EncryptionMethod("http://www.w3.org/2001/04/xmlenc#aes128-cbc");
            ed.CipherData = cd;

            //Add key information to the object.
            KeyInfo ki = new KeyInfo();
            ki.AddClause(new KeyInfoRetrievalMethod("#EK", "http://www.w3.org/2001/04/xmlenc#EncryptedKey"));
            ed.KeyInfo = ki;

            // Create new XML document and put encrypted data into it.
            XmlDocument doc = new XmlDocument();
            XmlElement encryptionPropertyElement = (XmlElement)doc.CreateElement("EncryptionProperty", EncryptedXml.XmlEncNamespaceUrl);
            EncryptionProperty ep = new EncryptionProperty(encryptionPropertyElement);
            ed.AddProperty(ep);

            // Output the resulting XML information into a file.
            try
            {
                string path = @"c:\test\MyTest.xml";

                File.WriteAllText(path, ed.GetXml().OuterXml);
            }
            catch (IOException e)
            {
                Console.WriteLine("File IO error. {0}", e);
            }
        }
    }
}

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


'/ This sample used the EncryptedData class to create a EncryptedData element
'/ and write it to an XML file. It demonstrates the use of CipherReference.
Module Module1

    Sub Main()
        ' Create a URI string.
        Dim uri As String = "http://www.woodgrovebank.com/document.xml"
        ' Create a Base64 transform. The input content retrieved from the
        ' URI should be Base64-decoded before other processing.
        Dim base64 As Transform = New XmlDsigBase64Transform
        Dim tc As New TransformChain
        tc.Add(base64)
        ' Create <CipherReference> information.
        Dim reference As CipherReference = New CipherReference(uri, tc)

        ' Create a new CipherData object.
        ' Note that you cannot assign both a CipherReference and a CipherValue
        ' to a CipherData object.
        Dim cd As CipherData = New CipherData(Reference)

        ' Create a new EncryptedData object.
        Dim ed As New EncryptedData

        'Add an encryption method to the object.
        ed.Id = "ED"
        ed.EncryptionMethod = New EncryptionMethod("http://www.w3.org/2001/04/xmlenc#aes128-cbc")
        ed.CipherData = cd

        'Add key information to the object.
        Dim ki As New KeyInfo
        ki.AddClause(New KeyInfoRetrievalMethod("#EK", "http://www.w3.org/2001/04/xmlenc#EncryptedKey"))
        ed.KeyInfo = ki

        ' Create new XML document and put encrypted data into it.
        Dim doc As New XmlDocument
        Dim encryptionPropertyElement As XmlElement = CType(doc.CreateElement("EncryptionProperty", EncryptedXml.XmlEncNamespaceUrl), XmlElement)
        Dim ep As New EncryptionProperty(encryptionPropertyElement)
        ed.AddProperty(ep)

        ' Output the resulting XML information into a file.
        Dim path As String = "c:\test\MyTest.xml"
        File.WriteAllText(path, ed.GetXml().OuterXml)
    End Sub

End Module

Remarques

Ce constructeur crée un CipherData objet qui représente l’élément dans le <CipherData> chiffrement XML et affecte la cipherReference valeur à la CipherReference propriété . L’objet CipherReference représente l’élément <CipherReference> , qui fournit l’emplacement des données chiffrées.

Notes

Un CipherData objet peut avoir une CipherReference propriété ou une CipherValue propriété, mais pas les deux. Un CryptographicException est levée si les deux sont affectés à un CipherData objet .