XmlDsigExcC14NWithCommentsTransform 類別

定義

命名空間:

System.Security.Cryptography.Xml

組件:

System.Security.Cryptography.Xml.dll

表示數位簽章的獨佔 C14N XML 規範化轉換 (連帶註解)，如全球資訊網協會 (W3C) 所定義。

public ref class XmlDsigExcC14NWithCommentsTransform : System::Security::Cryptography::Xml::XmlDsigExcC14NTransform

public class XmlDsigExcC14NWithCommentsTransform : System.Security.Cryptography.Xml.XmlDsigExcC14NTransform

type XmlDsigExcC14NWithCommentsTransform = class
    inherit XmlDsigExcC14NTransform

Public Class XmlDsigExcC14NWithCommentsTransform
Inherits XmlDsigExcC14NTransform

繼承

Object

Transform

XmlDsigExcC14NTransform

XmlDsigExcC14NWithCommentsTransform

範例

下列程式碼範例示範如何使用 類別簽署及驗證 XML 檔 XmlDsigExcC14NWithCommentsTransform 。 此範例會建立信封簽章。

//
// This example signs an XML file using an
// envelope signature. It then verifies the 
// signed XML.
//
#using <System.Xml.dll>
#using <System.Security.dll>
#using <System.dll>

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::X509Certificates;
using namespace System::Security::Cryptography::Xml;
using namespace System::Text;
using namespace System::Xml;

// Sign an XML file and save the signature in a new file.
static void SignXmlFile( String^ FileName, String^ SignedFileName, RSA^ Key )
{
   
   // Create a new XML document.
   XmlDocument^ doc = gcnew XmlDocument;
   
   // Format the document to ignore white spaces.
   doc->PreserveWhitespace = false;
   
   // Load the passed XML file using it's name.
   doc->Load( gcnew XmlTextReader( FileName ) );
   
   // Create a SignedXml object.
   SignedXml^ signedXml = gcnew SignedXml( doc );
   
   // Add the key to the SignedXml document. 
   signedXml->SigningKey = Key;
   
   // Specify a canonicalization method.
   signedXml->SignedInfo->CanonicalizationMethod = SignedXml::XmlDsigExcC14NWithCommentsTransformUrl;
   
   // Set the InclusiveNamespacesPrefixList property.
   XmlDsigExcC14NWithCommentsTransform^ canMethod = dynamic_cast<XmlDsigExcC14NWithCommentsTransform^>(signedXml->SignedInfo->CanonicalizationMethodObject);
   canMethod->InclusiveNamespacesPrefixList = L"Sign";
   
   // Create a reference to be signed.
   Reference^ reference = gcnew Reference;
   reference->Uri = L"";
   
   // Add an enveloped transformation to the reference.
   XmlDsigEnvelopedSignatureTransform^ env = gcnew XmlDsigEnvelopedSignatureTransform;
   reference->AddTransform( env );
   
   // Add the reference to the SignedXml object.
   signedXml->AddReference( reference );
   
   // Add an RSAKeyValue KeyInfo (optional; helps recipient find key to validate).
   KeyInfo^ keyInfo = gcnew KeyInfo;
   keyInfo->AddClause( gcnew RSAKeyValue( dynamic_cast<RSA^>(Key) ) );
   signedXml->KeyInfo = keyInfo;
   
   // Compute the signature.
   signedXml->ComputeSignature();
   
   // Get the XML representation of the signature and save
   // it to an XmlElement object.
   XmlElement^ xmlDigitalSignature = signedXml->GetXml();
   
   // Append the element to the XML document.
   doc->DocumentElement->AppendChild( doc->ImportNode( xmlDigitalSignature, true ) );
   if ( dynamic_cast<XmlDeclaration^>(doc->FirstChild) )
   {
      doc->RemoveChild( doc->FirstChild );
   }

   
   // Save the signed XML document to a file specified
   // using the passed string.
   XmlTextWriter^ xmltw = gcnew XmlTextWriter( SignedFileName,gcnew UTF8Encoding( false ) );
   doc->WriteTo( xmltw );
   xmltw->Close();
}


// Verify the signature of an XML file and return the result.
static Boolean VerifyXmlFile( String^ Name )
{
   
   // Create a new XML document.
   XmlDocument^ xmlDocument = gcnew XmlDocument;
   
   // Format using white spaces.
   xmlDocument->PreserveWhitespace = true;
   
   // Load the passed XML file into the document. 
   xmlDocument->Load( Name );
   
   // Create a new SignedXml object and pass it
   // the XML document class.
   SignedXml^ signedXml = gcnew SignedXml( xmlDocument );
   
   // Find the "Signature" node and create a new
   // XmlNodeList object.
   XmlNodeList^ nodeList = xmlDocument->GetElementsByTagName( L"Signature" );
   
   // Load the signature node.
   signedXml->LoadXml( dynamic_cast<XmlElement^>(nodeList->Item( 0 )) );
   
   // Check the signature and return the result.
   return signedXml->CheckSignature();
}


// Create example data to sign.
static void CreateSomeXml( String^ FileName )
{
   
   // Create a new XmlDocument object.
   XmlDocument^ document = gcnew XmlDocument;
   
   // Create a new XmlNode object.
   XmlNode^ node = document->CreateNode( XmlNodeType::Element, L"", L"MyXML", L"Don't_Sign" );
   
   // Append the node to the document.
   document->AppendChild( node );
   
   // Create a new XmlNode object.
   XmlNode^ subnode = document->CreateNode( XmlNodeType::Element, L"", L"TempElement", L"Sign" );
   
   // Add some text to the node.
   subnode->InnerText = L"Here is some data to sign.";
   
   // Append the node to the document.
   document->DocumentElement->AppendChild( subnode );
   
   // Save the XML document to the file name specified.
   XmlTextWriter^ xmltw = gcnew XmlTextWriter( FileName,gcnew UTF8Encoding( false ) );
   document->WriteTo( xmltw );
   xmltw->Close();
}

int main()
{
   try
   {
      
      // Create an XML file to sign.
      CreateSomeXml( L"Example.xml" );
      Console::WriteLine( L"New XML file created." );
      
      // Sign the XML that was just created and save it in a 
      // new file.
      //SignXmlFile("Example.xml", "SignedExample.xml", Key);
      Console::WriteLine( L"XML file signed." );
      
      // Verify the signature of the signed XML.
      Console::WriteLine( L"Verifying signature..." );
      bool result = VerifyXmlFile( L"SignedExample.xml" );
      
      // Display the results of the signature verification to 
      // the console.
      if ( result )
      {
         Console::WriteLine( L"The XML signature is valid." );
      }
      else
      {
         Console::WriteLine( L"The XML signature is not valid." );
      }
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
   }

   return 1;
}

//
// This example signs an XML file using an
// envelope signature. It then verifies the
// signed XML.
//
using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;

public class SignVerifyEnvelope
{

    public static void Main(String[] args)
    {
        try
        {
            // Generate a signing key.
            RSA Key = RSA.Create();

            // Create an XML file to sign.
            CreateSomeXml("Example.xml");
            Console.WriteLine("New XML file created.");

            // Sign the XML that was just created and save it in a
            // new file.
            //SignXmlFile("Example.xml", "SignedExample.xml", Key);
            Console.WriteLine("XML file signed.");

            // Verify the signature of the signed XML.
            Console.WriteLine("Verifying signature...");
            bool result = VerifyXmlFile("SignedExample.xml");

            // Display the results of the signature verification to
            // the console.
            if (result)
            {
                Console.WriteLine("The XML signature is valid.");
            }
            else
            {
                Console.WriteLine("The XML signature is not valid.");
            }
        }
        catch (CryptographicException e)
        {
            Console.WriteLine(e.Message);
        }
    }

    // Sign an XML file and save the signature in a new file.
    public static void SignXmlFile(string FileName, string SignedFileName, RSA Key)
    {
        // Create a new XML document.
        XmlDocument doc = new XmlDocument();

        // Format the document to ignore white spaces.
        doc.PreserveWhitespace = false;

        // Load the passed XML file using it's name.
        doc.Load(new XmlTextReader(FileName));

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

        // Add the key to the SignedXml document.
        signedXml.SigningKey = Key;

        // Specify a canonicalization method.
        signedXml.SignedInfo.CanonicalizationMethod = SignedXml.XmlDsigExcC14NWithCommentsTransformUrl;

        // Set the InclusiveNamespacesPrefixList property.
        XmlDsigExcC14NWithCommentsTransform canMethod = (XmlDsigExcC14NWithCommentsTransform)signedXml.SignedInfo.CanonicalizationMethodObject;
        canMethod.InclusiveNamespacesPrefixList = "Sign";

        // Create a reference to be signed.
        Reference reference = new Reference();
        reference.Uri = "";

        // Add an enveloped transformation to the reference.
        XmlDsigEnvelopedSignatureTransform env = new XmlDsigEnvelopedSignatureTransform();
        reference.AddTransform(env);

        // Add the reference to the SignedXml object.
        signedXml.AddReference(reference);

        // Add an RSAKeyValue KeyInfo (optional; helps recipient find key to validate).
        KeyInfo keyInfo = new KeyInfo();
        keyInfo.AddClause(new RSAKeyValue((RSA)Key));
        signedXml.KeyInfo = keyInfo;

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

        // Get the XML representation of the signature and save
        // it to an XmlElement object.
        XmlElement xmlDigitalSignature = signedXml.GetXml();

        // Append the element to the XML document.
        doc.DocumentElement.AppendChild(doc.ImportNode(xmlDigitalSignature, true));

        if (doc.FirstChild is XmlDeclaration)
        {
            doc.RemoveChild(doc.FirstChild);
        }

        // Save the signed XML document to a file specified
        // using the passed string.
        XmlTextWriter xmltw = new XmlTextWriter(SignedFileName, new UTF8Encoding(false));
        doc.WriteTo(xmltw);
        xmltw.Close();
    }
    // Verify the signature of an XML file and return the result.
    public static Boolean VerifyXmlFile(String Name)
    {
        // Create a new XML document.
        XmlDocument xmlDocument = new XmlDocument();

        // Format using white spaces.
        xmlDocument.PreserveWhitespace = true;

        // Load the passed XML file into the document.
        xmlDocument.Load(Name);

        // Create a new SignedXml object and pass it
        // the XML document class.
        SignedXml signedXml = new SignedXml(xmlDocument);

        // Find the "Signature" node and create a new
        // XmlNodeList object.
        XmlNodeList nodeList = xmlDocument.GetElementsByTagName("Signature");

        // Load the signature node.
        signedXml.LoadXml((XmlElement)nodeList[0]);

        // Check the signature and return the result.
        return signedXml.CheckSignature();
    }

    // Create example data to sign.
    public static void CreateSomeXml(string FileName)
    {
        // Create a new XmlDocument object.
        XmlDocument document = new XmlDocument();

        // Create a new XmlNode object.
        XmlNode node = document.CreateNode(XmlNodeType.Element, "", "MyXML", "Don't_Sign");

        // Append the node to the document.
        document.AppendChild(node);

        // Create a new XmlNode object.
        XmlNode subnode = document.CreateNode(XmlNodeType.Element, "", "TempElement", "Sign");

        // Add some text to the node.
        subnode.InnerText = "Here is some data to sign.";

        // Append the node to the document.
        document.DocumentElement.AppendChild(subnode);

        // Save the XML document to the file name specified.
        XmlTextWriter xmltw = new XmlTextWriter(FileName, new UTF8Encoding(false));
        document.WriteTo(xmltw);
        xmltw.Close();
    }
}

'
' This example signs an XML file using an
' envelope signature. It then verifies the 
' signed XML.
'
Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates
Imports System.Security.Cryptography.Xml
Imports System.Text
Imports System.Xml



Module SignVerifyEnvelope


    Sub Main(ByVal args() As String)
        Try
            ' Generate a signing key.
            Dim Key As RSA = RSA.Create()

            ' Create an XML file to sign.
            CreateSomeXml("Example.xml")
            Console.WriteLine("New XML file created.")

            ' Sign the XML that was just created and save it in a 
            ' new file.
            'SignXmlFile("Example.xml", "SignedExample.xml", Key);
            Console.WriteLine("XML file signed.")

            ' Verify the signature of the signed XML.
            Console.WriteLine("Verifying signature...")
            Dim result As Boolean = VerifyXmlFile("SignedExample.xml")

            ' Display the results of the signature verification to 
            ' the console.
            If result Then
                Console.WriteLine("The XML signature is valid.")
            Else
                Console.WriteLine("The XML signature is not valid.")
            End If
        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try

    End Sub


    ' Sign an XML file and save the signature in a new file.
    Sub SignXmlFile(ByVal FileName As String, ByVal SignedFileName As String, ByVal Key As RSA)
        ' Create a new XML document.
        Dim doc As New XmlDocument()

        ' Format the document to ignore white spaces.
        doc.PreserveWhitespace = False

        ' Load the passed XML file using it's name.
        doc.Load(New XmlTextReader(FileName))

        ' Create a SignedXml object.
        Dim signedXml As New SignedXml(doc)

        ' Add the key to the SignedXml document. 
        signedXml.SigningKey = Key

        ' Specify a canonicalization method.
        signedXml.SignedInfo.CanonicalizationMethod = signedXml.XmlDsigExcC14NWithCommentsTransformUrl

        ' Set the InclusiveNamespacesPrefixList property.
        Dim canMethod As XmlDsigExcC14NWithCommentsTransform = CType(signedXml.SignedInfo.CanonicalizationMethodObject, XmlDsigExcC14NWithCommentsTransform)
        canMethod.InclusiveNamespacesPrefixList = "Sign"

        ' Create a reference to be signed.
        Dim reference As New Reference()
        reference.Uri = ""

        ' Add an enveloped transformation to the reference.
        Dim env As New XmlDsigEnvelopedSignatureTransform()
        reference.AddTransform(env)

        ' Add the reference to the SignedXml object.
        signedXml.AddReference(reference)


        ' Add an RSAKeyValue KeyInfo (optional; helps recipient find key to validate).
        Dim keyInfo As New KeyInfo()
        keyInfo.AddClause(New RSAKeyValue(CType(Key, RSA)))
        signedXml.KeyInfo = keyInfo

        ' Compute the signature.
        signedXml.ComputeSignature()

        ' Get the XML representation of the signature and save
        ' it to an XmlElement object.
        Dim xmlDigitalSignature As XmlElement = signedXml.GetXml()

        ' Append the element to the XML document.
        doc.DocumentElement.AppendChild(doc.ImportNode(xmlDigitalSignature, True))


        If TypeOf doc.FirstChild Is XmlDeclaration Then
            doc.RemoveChild(doc.FirstChild)
        End If

        ' Save the signed XML document to a file specified
        ' using the passed string.
        Dim xmltw As New XmlTextWriter(SignedFileName, New UTF8Encoding(False))
        doc.WriteTo(xmltw)
        xmltw.Close()

    End Sub

    ' Verify the signature of an XML file and return the result.
    Function VerifyXmlFile(ByVal Name As String) As [Boolean]
        ' Create a new XML document.
        Dim xmlDocument As New XmlDocument()

        ' Format using white spaces.
        xmlDocument.PreserveWhitespace = True

        ' Load the passed XML file into the document. 
        xmlDocument.Load(Name)

        ' Create a new SignedXml object and pass it
        ' the XML document class.
        Dim signedXml As New SignedXml(xmlDocument)

        ' Find the "Signature" node and create a new
        ' XmlNodeList object.
        Dim nodeList As XmlNodeList = xmlDocument.GetElementsByTagName("Signature")

        ' Load the signature node.
        signedXml.LoadXml(CType(nodeList(0), XmlElement))

        ' Check the signature and return the result.
        Return signedXml.CheckSignature()

    End Function


    ' Create example data to sign.
    Sub CreateSomeXml(ByVal FileName As String)
        ' Create a new XmlDocument object.
        Dim document As New XmlDocument()

        ' Create a new XmlNode object.
        Dim node As XmlNode = document.CreateNode(XmlNodeType.Element, "", "MyXML", "Don't_Sign")

        ' Append the node to the document.
        document.AppendChild(node)

        ' Create a new XmlNode object.
        Dim subnode As XmlNode = document.CreateNode(XmlNodeType.Element, "", "TempElement", "Sign")

        ' Add some text to the node.
        subnode.InnerText = "Here is some data to sign."

        ' Append the node to the document.
        document.DocumentElement.AppendChild(subnode)

        ' Save the XML document to the file name specified.
        Dim xmltw As New XmlTextWriter(FileName, New UTF8Encoding(False))
        document.WriteTo(xmltw)
        xmltw.Close()

    End Sub
End Module

備註

類別 XmlDsigExcC14NWithCommentsTransform 代表具有批註的獨佔 C14N XML 標準化轉換。 這個類別類似于 XmlDsigExcC14NTransform 類別，可讓簽署者使用 XML 檔的正式形式建立摘要。 不過，類別 XmlDsigExcC14NWithCommentsTransform 會從標準化子檔排除上階內容。

XmlDsigExcC14NWithCommentsTransform當您需要正式化 XML 子檔，使其與其 XML 內容無關時，請使用 類別。 例如，在複雜通訊協定中使用已簽署 XML 的 Web 服務之類的應用程式，通常需要以這種方式正式化 XML。 這類應用程式通常會在各種動態建構元素內封存 XML，這可能會大幅變更檔，並導致 XML 簽章驗證失敗。 類別 XmlDsigExcC14NWithCommentsTransform 會藉由從標準子檔排除這類上階內容來解決此問題。

請注意，您無法直接建立標準化轉換類別的新實例。 若要指定標準化轉換，請將統一資源識別元 (URI) ，描述轉換至 CanonicalizationMethod 屬性，可從 屬性存取 SignedInfo 。 若要取得標準化轉換的參考，請使用 CanonicalizationMethodObject 可從 屬性存取 SignedInfo 的屬性。

描述 類別的 XmlDsigExcC14NWithCommentsTransform URI 是由 XmlDsigExcC14NWithCommentsTransformUrl 欄位所定義。

如需專屬 C14N 轉換的詳細資訊，請參閱可從 W3C 網站取得的 XMLDSIG 規格。 標準化演算法定義于 W3C 標準 XML 規格中。

建構函式

XmlDsigExcC14NWithCommentsTransform()	初始化 XmlDsigExcC14NWithCommentsTransform 類別的新執行個體。
XmlDsigExcC14NWithCommentsTransform(String)	初始化 XmlDsigExcC14NWithCommentsTransform 類別的新執行個體，此類別指定了命名空間前置詞清單，使用標準規範化演算法進行規範化。

屬性

Algorithm	取得或設定統一資源識別元 (URI)，它識別了目前轉換所執行的演算法。 (繼承來源 Transform)
Context	取得或設定 XmlElement 物件，表示目前 Transform 物件在其下執行的文件內容。 (繼承來源 Transform)
InclusiveNamespacesPrefixList	取得或設定含有命名空間前置詞的字串，以便使用標準規範化演算法進行規範化。 (繼承來源 XmlDsigExcC14NTransform)
InputTypes	取得型別陣列，其為目前 LoadInput(Object) 物件之 XmlDsigExcC14NTransform 方法的有效輸入。 (繼承來源 XmlDsigExcC14NTransform)
OutputTypes	取得可以從目前 GetOutput() 物件的 XmlDsigExcC14NTransform 方法輸出的型別陣列。 (繼承來源 XmlDsigExcC14NTransform)
PropagatedNamespaces	取得或設定 Hashtable 物件，內含傳送至簽章的命名空間。 (繼承來源 Transform)
Resolver	設定目前的 XmlResolver 物件。 (繼承來源 Transform)

方法

Equals(Object)	判斷指定的物件是否等於目前的物件。 (繼承來源 Object)
GetDigestedOutput(HashAlgorithm)	傳回與 XmlDsigExcC14NTransform 物件關聯的摘要。 (繼承來源 XmlDsigExcC14NTransform)
GetHashCode()	做為預設雜湊函式。 (繼承來源 Object)
GetInnerXml()	傳回 XmlDsigExcC14NTransform 物件參數的 XML 表示，此物件適合納入為 XMLDSIG <Transform> 項目的子項目。 (繼承來源 XmlDsigExcC14NTransform)
GetOutput()	傳回目前 XmlDsigExcC14NTransform 物件的輸出。 (繼承來源 XmlDsigExcC14NTransform)
GetOutput(Type)	傳回目前 XmlDsigExcC14NTransform 物件的輸出，做為指定型別的物件。 (繼承來源 XmlDsigExcC14NTransform)
GetType()	取得目前執行個體的 Type。 (繼承來源 Object)
GetXml()	傳回目前 Transform 物件的 XML 表示。 (繼承來源 Transform)
LoadInnerXml(XmlNodeList)	將指定的 XmlNodeList 物件剖析為 <Transform> 項目的轉換特定內容，並將目前 XmlDsigExcC14NTransform 物件的內部狀態設定成與 <Transform> 項目相符。 (繼承來源 XmlDsigExcC14NTransform)
LoadInput(Object)	在衍生類別中覆寫時，將指定輸入載入目前的 XmlDsigExcC14NTransform 物件。 (繼承來源 XmlDsigExcC14NTransform)
MemberwiseClone()	建立目前 Object 的淺層複製。 (繼承來源 Object)
ToString()	傳回代表目前物件的字串。 (繼承來源 Object)