EncryptedXml Klasa
Definicja
Ważne
Niektóre informacje odnoszą się do produktu w wersji wstępnej, który może zostać znacząco zmodyfikowany przed wydaniem. Firma Microsoft nie udziela żadnych gwarancji, jawnych lub domniemanych, w odniesieniu do informacji podanych w tym miejscu.
Reprezentuje model procesu implementowania szyfrowania XML.
public ref class EncryptedXmlpublic class EncryptedXmltype EncryptedXml = classPublic Class EncryptedXml- Dziedziczenie
-
EncryptedXml
Przykłady
W poniższym przykładzie kodu pokazano, jak utworzyć prostą klasę narzędzi, która używa algorytmu TripleDES do szyfrowania dokumentu 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
W poniższym przykładzie kodu pokazano, jak zaszyfrować dokument XML przy użyciu klucza symetrycznego. Ten przykład nie zawiera żadnych informacji o kluczu w zaszyfrowanym dokumencie 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;
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
W poniższym przykładzie kodu pokazano, jak zaszyfrować dokument XML przy użyciu klucza symetrycznego. Ten przykład osadza nazwę klucza w zaszyfrowanym dokumencie XML używanym przez metodę odszyfrowywania w celu znalezienia odpowiedniego klucza odszyfrowywania.
#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
W poniższym przykładzie kodu pokazano, jak zaszyfrować dokument XML przy użyciu klucza asymetrycznego. Ten przykład tworzy symetryczny klucz sesji w celu zaszyfrowania dokumentu, a następnie używa klucza asymetrycznego do osadzenia zaszyfrowanej wersji klucza sesji w dokumencie 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
Poniższy przykład kodu przedstawia sposób szyfrowania dokumentu XML przy użyciu certyfikatu X.509. Ten przykład tworzy symetryczny klucz sesji w celu zaszyfrowania dokumentu, a następnie używa certyfikatu X.509 do osadzenia zaszyfrowanej wersji klucza sesji w dokumencie 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
Uwagi
Klasa EncryptedXml jest główną klasą używaną do szyfrowania XML w .NET Framework. Szyfrowanie XML to oparty na standardach, współdziałalny sposób szyfrowania wszystkich lub części dokumentu XML lub dowolnych danych. Klasy szyfrowania .NET FRAMEWORK XML implementują specyfikację składni i przetwarzania XML w wersji 1.0 konsorcjum World Wide Web Consortium (W3C).
EncryptedXml Użyj klasy zawsze, gdy zachodzi potrzeba udostępniania zaszyfrowanych danych XML między aplikacjami lub organizacjami w standardowy sposób. Wszystkie dane zaszyfrowane przy użyciu tej klasy można odszyfrować za pomocą dowolnej implementacji specyfikacji W3C na potrzeby szyfrowania XML.
Szyfrowanie XML zastępuje dowolny element XML zwykłego tekstu lub dokument <EncryptedData> elementem, który zawiera zaszyfrowaną (lub tekst szyfrową) reprezentację zwykłego tekstu XML lub dowolnych danych. Element <EncryptedData> może opcjonalnie zawierać informacje o tym, gdzie znaleźć klucz, który odszyfruje tekst szyfrowania i który algorytm kryptograficzny został użyty do szyfrowania zwykłego tekstu.
Element <EncryptedKey> jest podobny do <EncryptedData> elementu w stylu i użyciu, z tą różnicą, że umożliwia szyfrowanie klucza, który odszyfruje wartość <EncryptedData> elementu. Należy pamiętać, że <EncryptedKey> element i <EncryptedData> element nigdy nie będą zawierać niezaszyfrowanego klucza.
Aby wymienić kluczowe informacje, użyj jednej z następujących metod:
Nie dołączaj żadnych kluczowych informacji. W przypadku wybrania tej opcji obie strony muszą uzgodnić algorytm i klucz przed wymianą zaszyfrowanych danych.
Uwzględnij lokalizację klucza w atrybucie
<RetrievalMethod>Uniform Resource Identifier (URI) elementu. Obie strony muszą z wyprzedzeniem uzgodnić kluczową lokalizację, a ta lokalizacja musi być przechowywana w tajemnicy.Dołącz nazwę ciągu mapowania na klucz w elemecie
<KeyName>. Obie strony muszą uzgodnić mapowanie nazw kluczy przed wymianą zaszyfrowanych danych, a to mapowanie musi być przechowywane w tajemnicy.Dołącz zaszyfrowany klucz do
<EncryptedKey>elementu . Obie strony muszą uzgodnić klucz, który odszyfrowuje zaszyfrowany klucz przed wymianą zaszyfrowanych danych. Opcjonalnie możesz dołączyć nazwę lub lokalizację klucza, który odszyfruje klucz w elemecie<EncryptedKey>.
Konstruktory
| EncryptedXml() |
Inicjuje nowe wystąpienie klasy EncryptedXml. |
| EncryptedXml(XmlDocument) |
Inicjuje EncryptedXml nowe wystąpienie klasy przy użyciu określonego dokumentu XML. |
| EncryptedXml(XmlDocument, Evidence) |
Inicjuje EncryptedXml nowe wystąpienie klasy przy użyciu określonego dokumentu XML i dowodów. |
Pola
| XmlEncAES128KeyWrapUrl |
Reprezentuje algorytm zawijania klucza 128-bitowego standardu AES (Uniform Resource Identifier) przestrzeni nazw (Rijndael Key Wrap algorithm). To pole jest stałe. |
| XmlEncAES128Url |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) algorytmu 128-bitowego algorytmu Advanced Encryption Standard (AES) (znanego również jako algorytm Rijndael). To pole jest stałe. |
| XmlEncAES192KeyWrapUrl |
Reprezentuje algorytm zawijania klucza 192-bitowego standardu AES (Uniform Resource Identifier) przestrzeni nazw (Rijndael Key Wrap algorithm). To pole jest stałe. |
| XmlEncAES192Url |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla algorytmu 192-bitowego algorytmu Advanced Encryption Standard (AES) (znanego również jako algorytm Rijndael). To pole jest stałe. |
| XmlEncAES256KeyWrapUrl |
Reprezentuje algorytm zawijania klucza 256-bitowego standardu AES (Uniform Resource Identifier) przestrzeni nazw (Rijndael Key Wrap algorithm). To pole jest stałe. |
| XmlEncAES256Url |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla 256-bitowego algorytmu AES (Advanced Encryption Standard) (znanego również jako algorytm Rijndael). To pole jest stałe. |
| XmlEncDESUrl |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) algorytmu szyfrowania cyfrowego (DES). To pole jest stałe. |
| XmlEncElementContentUrl |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla zawartości elementu szyfrowania XML. To pole jest stałe. |
| XmlEncElementUrl |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla elementu szyfrowania XML. To pole jest stałe. |
| XmlEncEncryptedKeyUrl |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla elementu szyfrowania |
| XmlEncNamespaceUrl |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla składni i przetwarzania szyfrowania XML. To pole jest stałe. |
| XmlEncRSA15Url |
Reprezentuje identyfikator URI (Uniform Resource Identifier) przestrzeni nazw dla algorytmu PKCS (Public Key Cryptography Standard) RSA (Public Key Cryptography Standard) w wersji 1.5. To pole jest stałe. |
| XmlEncRSAOAEPUrl |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla algorytmu szyfrowania RSA Optimal Asymetryczne dopełnienie szyfrowania (OAEP). To pole jest stałe. |
| XmlEncSHA256Url |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla algorytmu SHA-256. To pole jest stałe. |
| XmlEncSHA512Url |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla algorytmu SHA-512. To pole jest stałe. |
| XmlEncTripleDESKeyWrapUrl |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla algorytmu zawijania kluczy TRIPLEDES. To pole jest stałe. |
| XmlEncTripleDESUrl |
Reprezentuje przestrzeń nazw Uniform Resource Identifier (URI) dla algorytmu Triple DES. To pole jest stałe. |
Właściwości
| DocumentEvidence |
Pobiera lub ustawia dowody XmlDocument obiektu, z którego EncryptedXml jest skonstruowany obiekt. |
| Encoding |
Pobiera lub ustawia kodowanie używane do szyfrowania XML. |
| Mode |
Pobiera lub ustawia tryb szyfrowania używany do szyfrowania XML. |
| Padding |
Pobiera lub ustawia tryb wypełniania używany do szyfrowania XML. |
| Recipient |
Pobiera lub ustawia adresat zaszyfrowanych informacji o kluczu. |
| Resolver |
Pobiera lub ustawia XmlResolver obiekt używany przez model dom (Document Object Model) do rozpoznawania odwołań zewnętrznych XML. |
| XmlDSigSearchDepth |
Pobiera lub ustawia głębokość rekursji podpisu cyfrowego XML, aby zapobiec nieskończonej rekursji i przepełnieniu stosu. Może się tak zdarzyć, jeśli kod XML podpisu cyfrowego zawiera identyfikator URI, który następnie wskazuje oryginalny kod XML. |
Metody
| AddKeyNameMapping(String, Object) |
Definiuje mapowanie między nazwą klucza a kluczem symetrycznym lub kluczem asymetrycznym. |
| ClearKeyNameMappings() |
Resetuje wszystkie mapowanie nazw kluczy. |
| DecryptData(EncryptedData, SymmetricAlgorithm) |
Odszyfrowuje |
| DecryptDocument() |
Odszyfrowuje wszystkie |
| DecryptEncryptedKey(EncryptedKey) |
Określa klucz reprezentowany przez EncryptedKey element. |
| DecryptKey(Byte[], RSA, Boolean) |
Odszyfrowuje |
| DecryptKey(Byte[], SymmetricAlgorithm) |
Odszyfrowuje |
| Encrypt(XmlElement, String) |
Szyfruje zewnętrzny kod XML elementu przy użyciu określonego klucza w tabeli mapowania kluczy. |
| Encrypt(XmlElement, X509Certificate2) |
Szyfruje zewnętrzny kod XML elementu przy użyciu określonego certyfikatu X.509. |
| EncryptData(Byte[], SymmetricAlgorithm) |
Szyfruje dane w określonej tablicy bajtów przy użyciu określonego algorytmu symetrycznego. |
| EncryptData(XmlElement, SymmetricAlgorithm, Boolean) |
Szyfruje określony element lub jego zawartość przy użyciu określonego algorytmu symetrycznego. |
| EncryptKey(Byte[], RSA, Boolean) |
Szyfruje klucz używany przez adresata |
| EncryptKey(Byte[], SymmetricAlgorithm) |
Szyfruje klucz przy użyciu algorytmu symetrycznego, którego odbiorca używa do odszyfrowywania |
| Equals(Object) |
Określa, czy dany obiekt jest taki sam, jak bieżący obiekt. (Odziedziczone po Object) |
| GetDecryptionIV(EncryptedData, String) |
Pobiera wektor inicjowania odszyfrowywania (IV) z EncryptedData obiektu. |
| GetDecryptionKey(EncryptedData, String) |
Pobiera klucz odszyfrowywania z określonego EncryptedData obiektu. |
| GetHashCode() |
Służy jako domyślna funkcja skrótu. (Odziedziczone po Object) |
| GetIdElement(XmlDocument, String) |
Określa sposób rozpoznawania wewnętrznych odwołań identyfikatora URI (Uniform Resource Identifier). |
| GetType() |
Type Pobiera wartość bieżącego wystąpienia. (Odziedziczone po Object) |
| MemberwiseClone() |
Tworzy płytkią kopię bieżącego Objectelementu . (Odziedziczone po Object) |
| ReplaceData(XmlElement, Byte[]) |
Zastępuje element określoną odszyfrowaną |
| ReplaceElement(XmlElement, EncryptedData, Boolean) |
Zamienia określony element na określony EncryptedData obiekt. |
| ToString() |
Zwraca ciąg reprezentujący bieżący obiekt. (Odziedziczone po Object) |