EncryptedXml Classe
Definizione
Importante
Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.
Rappresenta il modello di processo per l'implementazione della crittografia XML.
public ref class EncryptedXmlpublic class EncryptedXmltype EncryptedXml = classPublic Class EncryptedXml- Ereditarietà
-
EncryptedXml
Esempio
Nell'esempio di codice seguente viene illustrato come creare una classe di utilità semplice che usa l'algoritmo TripleDES per crittografare un documento XML.
#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
Nell'esempio di codice seguente viene illustrato come crittografare un documento XML usando una chiave simmetrica. In questo esempio non sono incluse informazioni sulla chiave nel documento XML crittografato.
#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
Nell'esempio di codice seguente viene illustrato come crittografare un documento XML usando una chiave simmetrica. In questo esempio viene incorporato un nome di chiave nel documento XML crittografato usato dal metodo di decrittografia per trovare la chiave di decrittografia appropriata.
#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
Nell'esempio di codice seguente viene illustrato come crittografare un documento XML usando una chiave asimmetrica. In questo esempio viene creata una chiave di sessione simmetrica per crittografare il documento e quindi viene utilizzata la chiave asimmetrica per incorporare una versione crittografata della chiave di sessione nel documento XML.
#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
Nell'esempio di codice seguente viene illustrato come crittografare un documento XML usando un certificato X.509. In questo esempio viene creata una chiave di sessione simmetrica per crittografare il documento e quindi viene utilizzato il certificato X.509 per incorporare una versione crittografata della chiave di sessione nel documento XML.
#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
Commenti
La EncryptedXml classe è la classe principale usata per la crittografia XML in .NET Framework. La crittografia XML è un modo interoperabile basato su standard per crittografare tutti o parte di un documento XML o qualsiasi dato arbitrario. Le classi di crittografia XML di .NET Framework implementano la specifica Sintassi di crittografia XML W3C (World Wide Web Consortium) ed elaborazione versione 1.0 .
Usare la EncryptedXml classe ogni volta che è necessario condividere dati XML crittografati tra applicazioni o organizzazioni in modo standard. Tutti i dati crittografati tramite questa classe possono essere decrittografati da qualsiasi implementazione della specifica W3C per la crittografia XML.
La crittografia XML sostituisce qualsiasi elemento o documento XML di testo normale con l'elemento <EncryptedData> , che contiene una rappresentazione crittografata (o testo crittografato) di xml di testo normale o qualsiasi dato arbitrario. L'elemento <EncryptedData> può facoltativamente contenere informazioni sulla posizione in cui trovare una chiave che decrittograferà il testo crittografato e quale algoritmo di crittografia è stato usato per crittografare il testo normale.
L'elemento <EncryptedKey> è simile all'elemento <EncryptedData> in stile e utilizzo, ad eccezione del fatto che consente di crittografare una chiave che decrittograferà il valore dell'elemento <EncryptedData> . Si noti che l'elemento <EncryptedKey> e l'elemento <EncryptedData> non conterranno mai una chiave non crittografata.
Utilizzare uno dei metodi seguenti per scambiare le informazioni chiave:
Non includere informazioni chiave. Se si sceglie questa opzione, entrambe le parti devono accettare un algoritmo e una chiave prima di scambiare dati crittografati.
Includere la posizione della chiave nell'attributo URI (Uniform Resource Identifier) dell'elemento
<RetrievalMethod>. Entrambe le parti devono concordare la posizione chiave in anticipo e questa posizione deve essere mantenuta segreta.Includere un nome stringa mappato a una chiave nell'elemento
<KeyName>. Entrambe le parti devono concordare il mapping dei nomi di chiave prima di scambiare dati crittografati e questo mapping deve essere mantenuto segreto.Includere una chiave crittografata nell'elemento
<EncryptedKey>. Entrambe le parti devono accettare la chiave che decrittografa la chiave crittografata prima di scambiare dati crittografati. Facoltativamente, è possibile includere un nome o una posizione della chiave che decrittograferà la chiave nell'elemento<EncryptedKey>.
Costruttori
| EncryptedXml() |
Inizializza una nuova istanza della classe EncryptedXml. |
| EncryptedXml(XmlDocument) |
Inizializza una nuova istanza della classe EncryptedXml usando il documento XML specificato. |
| EncryptedXml(XmlDocument, Evidence) |
Inizializza una nuova istanza della classe EncryptedXml usando il documento XML specificato e l'evidenza. |
Campi
| XmlEncAES128KeyWrapUrl |
Rappresenta l'URI (Uniform Resource Identifier) dello spazio dei nomi per l'algoritmo di wrapping della chiave AES (Advanced Encryption Standard) a 128 bit, noto anche come algoritmo di wrapping della chiave Rijndael. Questo campo è costante. |
| XmlEncAES128Url |
Rappresenta l'URI (Uniform Resource Identifier) dello spazio dei nomi per l'algoritmo AES (Advanced Encryption Standard) a 128 bit, noto anche come algoritmo Rijndael. Questo campo è costante. |
| XmlEncAES192KeyWrapUrl |
Rappresenta l'URI (Uniform Resource Identifier) dello spazio dei nomi per l'algoritmo di wrapping della chiave AES (Advanced Encryption Standard) a 128 bit, noto anche come algoritmo di wrapping della chiave Rijndael. Questo campo è costante. |
| XmlEncAES192Url |
Rappresenta l'URI (Uniform Resource Identifier) dello spazio dei nomi per l'algoritmo AES (Advanced Encryption Standard) a 128 bit, noto anche come algoritmo Rijndael. Questo campo è costante. |
| XmlEncAES256KeyWrapUrl |
Rappresenta l'URI (Uniform Resource Identifier) dello spazio dei nomi per l'algoritmo di wrapping della chiave AES (Advanced Encryption Standard) a 128 bit, noto anche come algoritmo di wrapping della chiave Rijndael. Questo campo è costante. |
| XmlEncAES256Url |
Rappresenta l'URI (Uniform Resource Identifier) dello spazio dei nomi per l'algoritmo AES (Advanced Encryption Standard) a 128 bit, noto anche come algoritmo Rijndael. Questo campo è costante. |
| XmlEncDESUrl |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi dell'algoritmo DES (Digital Encryption Standard). Questo campo è costante. |
| XmlEncElementContentUrl |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi del contenuto dell'elemento crittografico XML. Questo campo è costante. |
| XmlEncElementUrl |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi di un elemento crittografico XML. Questo campo è costante. |
| XmlEncEncryptedKeyUrl |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi dell'elemento |
| XmlEncNamespaceUrl |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi della sintassi e dell'elaborazione crittografica XML. Questo campo è costante. |
| XmlEncRSA15Url |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi dell'algoritmo RSA Public Key Cryptography Standard (PKCS) Version 1.5. Questo campo è costante. |
| XmlEncRSAOAEPUrl |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi dell'algoritmo crittografico OAEP (Optimal Asymmetric Encryption Padding) RSA. Questo campo è costante. |
| XmlEncSHA256Url |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi dell'algoritmo SHA-256. Questo campo è costante. |
| XmlEncSHA512Url |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi dell'algoritmo SHA-512. Questo campo è costante. |
| XmlEncTripleDESKeyWrapUrl |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi dell'algoritmo di wrapping della chiave TRIPLEDES. Questo campo è costante. |
| XmlEncTripleDESUrl |
Rappresenta l'URI (Uniform Resource Identifier) di spazio dei nomi dell'algoritmo Triple DES. Questo campo è costante. |
Proprietà
| DocumentEvidence |
Ottiene o imposta l'evidenza dell'oggetto XmlDocument dal quale viene costruito l'oggetto EncryptedXml. |
| Encoding |
Ottiene o imposta la codifica usata per la crittografia XML. |
| Mode |
Ottiene o imposta la modalità di crittografia usata per la crittografia XML. |
| Padding |
Ottiene o imposta la modalità di spaziatura interna usata per la crittografia XML. |
| Recipient |
Ottiene o imposta il destinatario delle informazioni sulla chiave crittografate. |
| Resolver |
Ottiene o imposta l'oggetto XmlResolver usato da DOM (Document Object Model) per risolvere i riferimenti XML esterni. |
| XmlDSigSearchDepth |
Ottiene o imposta la ricorsione della firma digitale XML per impedire la ricorsione infinita e l'overflow dello stack. Questa situazione si può verificare se la firma digitale XML contiene l'URI che fa quindi riferimento ai dati XML originali. |
Metodi
| AddKeyNameMapping(String, Object) |
Definisce l'associazione tra il nome della chiave e una chiave simmetrica o asimmetrica. |
| ClearKeyNameMappings() |
Reimposta tutte le associazioni dei nomi di chiave. |
| DecryptData(EncryptedData, SymmetricAlgorithm) |
Decrittografa l'elemento |
| DecryptDocument() |
Decrittografa tutti gli elementi |
| DecryptEncryptedKey(EncryptedKey) |
Determina la chiave rappresentata dall'elemento EncryptedKey. |
| DecryptKey(Byte[], RSA, Boolean) |
Decrittografa l'elemento |
| DecryptKey(Byte[], SymmetricAlgorithm) |
Decrittografa l'elemento |
| Encrypt(XmlElement, String) |
Crittografa l'XML esterno di un elemento usando la chiave specificata nella tabella dei mapping delle chiavi. |
| Encrypt(XmlElement, X509Certificate2) |
Crittografa l'XML esterno di un elemento usando il certificato X.509 specificato. |
| EncryptData(Byte[], SymmetricAlgorithm) |
Crittografa i dati della matrice di byte specificata usando l'algoritmo simmetrico indicato. |
| EncryptData(XmlElement, SymmetricAlgorithm, Boolean) |
Crittografa l'elemento specificato o il relativo contenuto usando l'algoritmo simmetrico indicato. |
| EncryptKey(Byte[], RSA, Boolean) |
Crittografa la chiave usata dal destinatario per decrittografare l'elemento |
| EncryptKey(Byte[], SymmetricAlgorithm) |
Crittografa una chiave usando l'algoritmo simmetrico che il destinatario userà per decrittografare l'elemento |
| Equals(Object) |
Determina se l'oggetto specificato è uguale all'oggetto corrente. (Ereditato da Object) |
| GetDecryptionIV(EncryptedData, String) |
Recupera il vettore di inizializzazione (IV) di decrittografia da un oggetto EncryptedData. |
| GetDecryptionKey(EncryptedData, String) |
Recupera la chiave di decrittografia dall'oggetto EncryptedData specificato. |
| GetHashCode() |
Funge da funzione hash predefinita. (Ereditato da Object) |
| GetIdElement(XmlDocument, String) |
Determina la modalità di risoluzione dei riferimenti URI (Uniform Resource Identifier) interni. |
| GetType() |
Ottiene l'oggetto Type dell'istanza corrente. (Ereditato da Object) |
| MemberwiseClone() |
Crea una copia superficiale dell'oggetto Object corrente. (Ereditato da Object) |
| ReplaceData(XmlElement, Byte[]) |
Sostituisce un elemento |
| ReplaceElement(XmlElement, EncryptedData, Boolean) |
Sostituisce l'elemento indicato con l'oggetto EncryptedData specificato. |
| ToString() |
Restituisce una stringa che rappresenta l'oggetto corrente. (Ereditato da Object) |
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