XmlDsigC14NWithCommentsTransformとは？ わかりやすく解説

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XmlDsigC14NWithCommentsTransform クラス

W3C (World Wide Web Consortium) によって定義された、デジタル署名の C14N XML 標準化変換をコメント付きで表します。

名前空間: System.Security.Cryptography.Xml
アセンブリ: System.Security (system.security.dll 内)
構文構文

Visual Basic (宣言)
Public Class XmlDsigC14NWithCommentsTransform
    Inherits XmlDsigC14NTransform
Visual Basic (使用法)
Dim instance As XmlDsigC14NWithCommentsTransform
C#
public class XmlDsigC14NWithCommentsTransform
 : XmlDsigC14NTransform
C++
public ref class XmlDsigC14NWithCommentsTransform
 : public XmlDsigC14NTransform
J#
public class XmlDsigC14NWithCommentsTransform
 extends XmlDsigC14NTransform
JScript
public class XmlDsigC14NWithCommentsTransform
 extends XmlDsigC14NTransform
解説解説

XmlDsigC14NWithCommentsTransform クラスは、XML ドキュメントの標準形式を表す C14N XML 標準化変換を表します。この変換により、署名者は、XML ドキュメントの標準形式を使用してダイジェストを作成できます。受信者は、同じ変換による同じ XML ドキュメントの標準形式を使用してデジタル署名を検証できます。

コメントを含んでいる XML ドキュメントに署名する必要がある場合は、XmlDsigC14NWithCommentsTransform クラスを使用します。

標準化変換クラスの新しいインスタンスを直接作成することはできません。標準化変換を指定するには、変換を記述する URI (Uniform Resource Identifier) を、SignedInfo プロパティからアクセスできる CanonicalizationMethod プロパティに渡します。標準化変換の参照を取得するには、SignedInfo プロパティからアクセスできる CanonicalizationMethodObject プロパティを使用します。

XmlDsigExcC14NWithCommentsTransform クラスを記述する URI は、XmlDsigExcC14NWithCommentsTransformUrl フィールドで定義されます。

XmlDsigC14NWithCommentsTransform クラスを表す URI は、XmlDsigC14NWithCommentsTransformUrl フィールドおよび XmlDsigCanonicalizationWithCommentsUrl フィールドによって定義されます。

C14N コメント付き変換の詳細については、www.w3.org/tr/xmldsig-core/ の W3C (World Wide Web Consortium) から提供されている XMLDSIG 仕様のセクション 6.5 および 6.6.1 を参照してください。標準化アルゴリズムは、www.w3.org/tr/xml-c14n の W3C『Canonical XML』の仕様で定義されています。

使用例使用例

このセクションには、2 つのコード例が含まれています。最初の例では、デタッチ シグネチャを使用して XML ファイルに署名する方法を示します。この例では、www.microsoft.com/japan の署名を XML ファイルに作成してから、そのファイルを検証します。2 番目の例では、エンベロープ シグネチャを使用して XML ファイルに署名する方法を示します。この例では、XML ファイルの署名を作成してから、新しい XML ファイルに署名を保存します。

例 1

Visual Basic
' This example signs a file specified by a URI 
' using a detached signature. It then verifies  
' the signed XML.

Imports System
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.Text
Imports System.Xml

Class XMLDSIGDetached

   
   <STAThread()>  _
   Overloads Shared Sub
 Main(args() As String)
      ' The URI to sign.
      Dim resourceToSign As String
 = "http://www.microsoft.com"
      
      ' The name of the file to which to save the XML signature.
      Dim XmlFileName As String
 = "xmldsig.xml"
      
      Try
         
         ' Generate a signing key.
         Dim Key As New
 RSACryptoServiceProvider()
         
         Console.WriteLine("Signing: {0}", resourceToSign)
         
         ' Sign the detached resourceand save the signature in an XML
 file.
         SignDetachedResource(resourceToSign, XmlFileName, Key)
         
         Console.WriteLine("XML signature was succesfully computed
 and saved to {0}.", XmlFileName)
         
         ' Verify the signature of the signed XML.
         Console.WriteLine("Verifying signature...")
         
         'Verify the XML signature in the XML file.
         Dim result As Boolean
 = VerifyDetachedSignature(XmlFileName)
         
         ' 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.
   Public Shared Sub SignDetachedResource(URIString
 As String, XmlSigFileName As
 String, Key As RSA)
      ' Create a SignedXml object.
      Dim signedXml As New
 SignedXml()
      
      ' Assign the key to the SignedXml object.
      signedXml.SigningKey = Key
      
      ' Create a reference to be signed.
      Dim reference As New
 Reference()
      
      ' Add the passed URI to the reference object.
      reference.Uri = URIString
      
      ' 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()
      
      ' Save the signed XML document to a file specified
      ' using the passed string.
      Dim xmltw As New XmlTextWriter(XmlSigFileName,
 New UTF8Encoding(False))
      xmlDigitalSignature.WriteTo(xmltw)
      xmltw.Close()
   End Sub 
   
   ' Verify the signature of an XML file and return the result.
   Public Shared Function
 VerifyDetachedSignature(XmlSigFileName As String)
 As [Boolean]
      ' Create a new XML document.
      Dim xmlDocument As New
 XmlDocument()
      
      ' Load the passed XML file into the document.
      xmlDocument.Load(XmlSigFileName)
      
      ' Create a new SignedXMl object.
      Dim signedXml As New
 SignedXml()
      
      ' 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
C#
//
// This example signs a file specified by a URI 
// using a detached signature. It then verifies  
// the signed XML.
//

using System;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;



class XMLDSIGDetached
{
    
    [STAThread]
    static void Main(string[]
 args)
    {
        // The URI to sign.
        string resourceToSign = "http://www.microsoft.com";
        
        // The name of the file to which to save the XML signature.
        string XmlFileName = "xmldsig.xml";

        try
        {

            // Generate a signing key.
            RSACryptoServiceProvider Key = new RSACryptoServiceProvider();

            Console.WriteLine("Signing: {0}", resourceToSign);

            // Sign the detached resourceand save the signature in an
 XML file.
            SignDetachedResource(resourceToSign, XmlFileName, Key);

            Console.WriteLine("XML signature was succesfully computed and saved
 to {0}.", XmlFileName);

            // Verify the signature of the signed XML.
            Console.WriteLine("Verifying signature...");

            //Verify the XML signature in the XML file.
            bool result = VerifyDetachedSignature(XmlFileName);

            // 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 SignDetachedResource(string
 URIString, string XmlSigFileName, RSA Key)
    {
        // Create a SignedXml object.
        SignedXml signedXml = new SignedXml();

        // Assign the key to the SignedXml object.
        signedXml.SigningKey = Key;

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

        // Add the passed URI to the reference object.
        reference.Uri = URIString;
        
        // 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();

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

        // Load the passed XML file into the document.
        xmlDocument.Load(XmlSigFileName);
    
        // Create a new SignedXMl object.
        SignedXml signedXml = new SignedXml();

        // 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();
    }
}
C++
//
// This example signs a file specified by a URI 
// using a detached signature. It then verifies  
// the signed XML.
//
#using <System.Security.dll>
#using <System.Xml.dll>

using namespace System;
using namespace System::Security::Cryptography;
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.
void SignDetachedResource( String^ URIString, String^ XmlSigFileName,
 RSA^ RSAKey )
{
   
   // Create a SignedXml object.
   SignedXml^ signedXml = gcnew SignedXml;
   
   // Assign the key to the SignedXml object.
   signedXml->SigningKey = RSAKey;
   
   // Create a reference to be signed.
   Reference^ reference = gcnew Reference;
   
   // Add the passed URI to the reference object.
   reference->Uri = URIString;
   
   // Add a transformation if the URI is an XML file.
   if ( URIString->EndsWith( "xml" ) )
   {
      
      // 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( safe_cast<RSA^>(RSAKey) ) );
      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();
      
      // Save the signed XML document to a file specified
      // using the passed string.
      XmlTextWriter^ xmltw = gcnew XmlTextWriter( XmlSigFileName,gcnew UTF8Encoding(
 false ) );
      xmlDigitalSignature->WriteTo( xmltw );
      xmltw->Close();
   }
}


// Verify the signature of an XML file and return the result.
Boolean VerifyDetachedSignature( String^ XmlSigFileName )
{
   
   // Create a new XML document.
   XmlDocument^ xmlDocument = gcnew XmlDocument;
   
   // Load the passed XML file into the document.
   xmlDocument->Load( XmlSigFileName );
   
   // Create a new SignedXMl object.
   SignedXml^ signedXml = gcnew SignedXml;
   
   // Find the S"Signature" node and create a new
   // XmlNodeList object.
   XmlNodeList^ nodeList = xmlDocument->GetElementsByTagName( "Signature"
 );
   
   // Load the signature node.
   signedXml->LoadXml( safe_cast<XmlElement^>(nodeList->Item( 0 )) );
   
   // Check the signature and return the result.
   return signedXml->CheckSignature();
}


int main()
{
   
   // The URI to sign.
   String^ resourceToSign = "http://www.microsoft.com";
   
   // The name of the file to which to save the XML signature.
   String^ XmlFileName = "xmldsig.xml";
   try
   {
      
      // Generate a signing key.
      RSACryptoServiceProvider^ Key = gcnew RSACryptoServiceProvider;
      Console::WriteLine( "Signing: {0}", resourceToSign );
      
      // Sign the detached resourceand save the signature in an XML
 file.
      SignDetachedResource( resourceToSign, XmlFileName, Key );
      Console::WriteLine( "XML signature was succesfully computed and saved
 to {0}.", XmlFileName );
      
      // Verify the signature of the signed XML.
      Console::WriteLine( "Verifying signature..." );
      
      //Verify the XML signature in the XML file.
      bool result = VerifyDetachedSignature( XmlFileName );
      
      // 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 );
   }

}
J#
//
// This example signs a file specified by a URI 
// using a detached signature. It then verifies  
// the signed XML.
//
import System.*;
import System.Security.Cryptography.*;
import System.Security.Cryptography.Xml.*;
import System.Text.*;
import System.Xml.*;

class XMLDSIGDetached
{
    /** @attribute STAThread()
     */
    public static void main(String[]
 args)
    {
        // The URI to sign.
        String resourceToSign = "http://www.microsoft.com";

        // The name of the file to which to save the XML signature.
        String xmlFileName = "xmldsig.xml";

        try {
            // Generate a signing key.
            RSACryptoServiceProvider key = new RSACryptoServiceProvider();
            Console.WriteLine("Signing: {0}", resourceToSign);

            // Sign the detached resourceand save the signature in an
 XML file.
            SignDetachedResource(resourceToSign, xmlFileName, key);
            Console.WriteLine("XML signature was succesfully computed "
 
                + "and saved to {0}.", xmlFileName);

            // Verify the signature of the signed XML.
            Console.WriteLine("Verifying signature...");

            //Verify the XML signature in the XML file.
            boolean result = VerifyDetachedSignature(xmlFileName).booleanValue();

            // 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.get_Message());
        }
    } //main

    // Sign an XML file and save the signature in a new file.
    public static void SignDetachedResource(String
 uriString, 
        String xmlSigFileName, RSA key)
    {
        // Create a SignedXml object.
        SignedXml signedXml = new SignedXml();

        // Assign the key to the SignedXml object.
        signedXml.set_SigningKey(key);

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

        // Add the passed URI to the reference object.
        reference.set_Uri(uriString);

        // Add a transformation if the URI is an XML file.
        if (uriString.EndsWith("xml")) {
            reference.AddTransform(new XmlDsigC14NWithCommentsTransform());
        }

        // 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.set_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();

        // Save the signed XML document to a file specified
        // using the passed string.
        XmlTextWriter xmlTW = new XmlTextWriter(xmlSigFileName,
 
            new UTF8Encoding(false));

        xmlDigitalSignature.WriteTo(xmlTW);
        xmlTW.Close();
    } //SignDetachedResource

    // Verify the signature of an XML file and return the result.
    public static Boolean VerifyDetachedSignature(String
 xmlSigFileName)
    {
        // Create a new XML document.
        XmlDocument xmlDocument = new XmlDocument();

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

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

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

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

        // Check the signature and return the result.
        return new Boolean(signedXml.CheckSignature());
    } //VerifyDetachedSignature
} //XMLDSIGDetached

例 2

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


Public Class SignVerifyEnvelope

   Overloads Public Shared
 Sub Main(args() As [String])
      Try
         ' Generate a signing key.
         Dim Key As New
 RSACryptoServiceProvider()
         
         ' 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.
   Public Shared Sub SignXmlFile(FileName
 As String, SignedFileName As
 String, 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
      
      ' 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.
   Public Shared Function
 VerifyXmlFile(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.
   Public Shared Sub CreateSomeXml(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,
 "", "MyElement",
 "samples")
      
      ' Add some text to the node.
      node.InnerText = "Example text to be signed."
      
      ' Append the node to the document.
      document.AppendChild(node)
      
      ' 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 Class
C#
// 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.Xml;
using System.Text;
using System.Xml;

public class SignVerifyEnvelope
{

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

            // 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;

        // 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, "", "MyElement",
 "samples");
        
        // Add some text to the node.
        node.InnerText = "Example text to be signed.";

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

        // Save the XML document to the file name specified.
        XmlTextWriter xmltw = new XmlTextWriter(FileName, new
 UTF8Encoding(false));
        document.WriteTo(xmltw);
        xmltw.Close();
    }
}
C++
// This example signs an XML file using an
// envelope signature. It then verifies the 
// signed XML.
#using <System.Security.dll>
#using <System.Xml.dll>

using namespace System;
using namespace System::Security::Cryptography;
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.
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;
   
   // Create a reference to be signed.
   Reference^ reference = gcnew Reference;
   reference->Uri = "";
   
   // 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( safe_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 ( (doc->FirstChild)->GetType() == XmlDeclaration::typeid
 )
   {
      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.
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 S"Signature" node and create a new
   // XmlNodeList Object*.
   XmlNodeList^ nodeList = xmlDocument->GetElementsByTagName( "Signature"
 );
   
   // Load the signature node.
   signedXml->LoadXml( safe_cast<XmlElement^>(nodeList->Item( 0 )) );
   
   // Check the signature and return the result.
   return signedXml->CheckSignature();
}


// Create example data to sign.
void CreateSomeXml( String^ FileName )
{
   
   // Create a new XmlDocument Object*.
   XmlDocument^ document = gcnew XmlDocument;
   
   // Create a new XmlNode Object*.
   XmlNode^ node = document->CreateNode( XmlNodeType::Element, "", "MyElement",
 "samples" );
   
   // Add some text to the node.
   node->InnerText = "Example text to be signed.";
   
   // Append the node to the document.
   document->AppendChild( node );
   
   // Save the XML document to the file name specified.
   XmlTextWriter^ xmltw = gcnew XmlTextWriter( FileName,gcnew UTF8Encoding( false
 ) );
   document->WriteTo( xmltw );
   xmltw->Close();
}

void main()
{
   try
   {
      
      // Generate a signing key.
      RSACryptoServiceProvider^ Key = gcnew RSACryptoServiceProvider;
      
      // 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 );
   }

}
継承階層継承階層
System.Object
   System.Security.Cryptography.Xml.Transform
     System.Security.Cryptography.Xml.XmlDsigC14NTransform
      System.Security.Cryptography.Xml.XmlDsigC14NWithCommentsTransform
スレッド セーフスレッド セーフ
この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバの場合は、スレッド セーフであるとは限りません。
プラットフォームプラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報バージョン情報
.NET Framework
サポート対象 : 2.0、1.1、1.0
参照参照
関連項目
XmlDsigC14NWithCommentsTransform メンバ
System.Security.Cryptography.Xml 名前空間

XmlDsigC14NWithCommentsTransform コンストラクタ

XmlDsigC14NWithCommentsTransform クラスの新しいインスタンスを初期化します。

名前空間: System.Security.Cryptography.Xml
アセンブリ: System.Security (system.security.dll 内)
構文構文

Visual Basic (宣言)
Public Sub New
Visual Basic (使用法)
Dim instance As New XmlDsigC14NWithCommentsTransform
C#
public XmlDsigC14NWithCommentsTransform ()
C++
public:
XmlDsigC14NWithCommentsTransform ()
J#
public XmlDsigC14NWithCommentsTransform ()
JScript
public function XmlDsigC14NWithCommentsTransform
 ()
使用例使用例

このセクションには、2 つのコード例が含まれています。最初の例では、デタッチ シグネチャを使用して XML ファイルに署名する方法を示します。この例では、www.microsoft.com/japan の署名を XML ファイルに作成してから、そのファイルを検証します。2 番目の例では、エンベロープ シグネチャを使用して XML ファイルに署名する方法を示します。この例では、XML ファイルの署名を作成してから、新しい XML ファイルに署名を保存します。

例 1

Visual Basic
' This example signs a file specified by a URI 
' using a detached signature. It then verifies  
' the signed XML.

Imports System
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Imports System.Text
Imports System.Xml

Class XMLDSIGDetached

   
   <STAThread()>  _
   Overloads Shared Sub
 Main(args() As String)
      ' The URI to sign.
      Dim resourceToSign As String
 = "http://www.microsoft.com"
      
      ' The name of the file to which to save the XML signature.
      Dim XmlFileName As String
 = "xmldsig.xml"
      
      Try
         
         ' Generate a signing key.
         Dim Key As New
 RSACryptoServiceProvider()
         
         Console.WriteLine("Signing: {0}", resourceToSign)
         
         ' Sign the detached resourceand save the signature in an XML
 file.
         SignDetachedResource(resourceToSign, XmlFileName, Key)
         
         Console.WriteLine("XML signature was succesfully computed
 and saved to {0}.", XmlFileName)
         
         ' Verify the signature of the signed XML.
         Console.WriteLine("Verifying signature...")
         
         'Verify the XML signature in the XML file.
         Dim result As Boolean
 = VerifyDetachedSignature(XmlFileName)
         
         ' 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.
   Public Shared Sub SignDetachedResource(URIString
 As String, XmlSigFileName As
 String, Key As RSA)
      ' Create a SignedXml object.
      Dim signedXml As New
 SignedXml()
      
      ' Assign the key to the SignedXml object.
      signedXml.SigningKey = Key
      
      ' Create a reference to be signed.
      Dim reference As New
 Reference()
      
      ' Add the passed URI to the reference object.
      reference.Uri = URIString
      
      ' 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()
      
      ' Save the signed XML document to a file specified
      ' using the passed string.
      Dim xmltw As New XmlTextWriter(XmlSigFileName,
 New UTF8Encoding(False))
      xmlDigitalSignature.WriteTo(xmltw)
      xmltw.Close()
   End Sub 
   
   ' Verify the signature of an XML file and return the result.
   Public Shared Function
 VerifyDetachedSignature(XmlSigFileName As String)
 As [Boolean]
      ' Create a new XML document.
      Dim xmlDocument As New
 XmlDocument()
      
      ' Load the passed XML file into the document.
      xmlDocument.Load(XmlSigFileName)
      
      ' Create a new SignedXMl object.
      Dim signedXml As New
 SignedXml()
      
      ' 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
C#
//
// This example signs a file specified by a URI 
// using a detached signature. It then verifies  
// the signed XML.
//

using System;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;



class XMLDSIGDetached
{
    
    [STAThread]
    static void Main(string[]
 args)
    {
        // The URI to sign.
        string resourceToSign = "http://www.microsoft.com";
        
        // The name of the file to which to save the XML signature.
        string XmlFileName = "xmldsig.xml";

        try
        {

            // Generate a signing key.
            RSACryptoServiceProvider Key = new RSACryptoServiceProvider();

            Console.WriteLine("Signing: {0}", resourceToSign);

            // Sign the detached resourceand save the signature in an
 XML file.
            SignDetachedResource(resourceToSign, XmlFileName, Key);

            Console.WriteLine("XML signature was succesfully computed and saved
 to {0}.", XmlFileName);

            // Verify the signature of the signed XML.
            Console.WriteLine("Verifying signature...");

            //Verify the XML signature in the XML file.
            bool result = VerifyDetachedSignature(XmlFileName);

            // 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 SignDetachedResource(string
 URIString, string XmlSigFileName, RSA Key)
    {
        // Create a SignedXml object.
        SignedXml signedXml = new SignedXml();

        // Assign the key to the SignedXml object.
        signedXml.SigningKey = Key;

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

        // Add the passed URI to the reference object.
        reference.Uri = URIString;
        
        // 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();

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

        // Load the passed XML file into the document.
        xmlDocument.Load(XmlSigFileName);
    
        // Create a new SignedXMl object.
        SignedXml signedXml = new SignedXml();

        // 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();
    }
}
C++
//
// This example signs a file specified by a URI 
// using a detached signature. It then verifies  
// the signed XML.
//
#using <System.Security.dll>
#using <System.Xml.dll>

using namespace System;
using namespace System::Security::Cryptography;
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.
void SignDetachedResource( String^ URIString, String^ XmlSigFileName,
 RSA^ RSAKey )
{
   
   // Create a SignedXml object.
   SignedXml^ signedXml = gcnew SignedXml;
   
   // Assign the key to the SignedXml object.
   signedXml->SigningKey = RSAKey;
   
   // Create a reference to be signed.
   Reference^ reference = gcnew Reference;
   
   // Add the passed URI to the reference object.
   reference->Uri = URIString;
   
   // Add a transformation if the URI is an XML file.
   if ( URIString->EndsWith( "xml" ) )
   {
      
      // 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( safe_cast<RSA^>(RSAKey) ) );
      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();
      
      // Save the signed XML document to a file specified
      // using the passed string.
      XmlTextWriter^ xmltw = gcnew XmlTextWriter( XmlSigFileName,gcnew UTF8Encoding(
 false ) );
      xmlDigitalSignature->WriteTo( xmltw );
      xmltw->Close();
   }
}


// Verify the signature of an XML file and return the result.
Boolean VerifyDetachedSignature( String^ XmlSigFileName )
{
   
   // Create a new XML document.
   XmlDocument^ xmlDocument = gcnew XmlDocument;
   
   // Load the passed XML file into the document.
   xmlDocument->Load( XmlSigFileName );
   
   // Create a new SignedXMl object.
   SignedXml^ signedXml = gcnew SignedXml;
   
   // Find the S"Signature" node and create a new
   // XmlNodeList object.
   XmlNodeList^ nodeList = xmlDocument->GetElementsByTagName( "Signature"
 );
   
   // Load the signature node.
   signedXml->LoadXml( safe_cast<XmlElement^>(nodeList->Item( 0 )) );
   
   // Check the signature and return the result.
   return signedXml->CheckSignature();
}


int main()
{
   
   // The URI to sign.
   String^ resourceToSign = "http://www.microsoft.com";
   
   // The name of the file to which to save the XML signature.
   String^ XmlFileName = "xmldsig.xml";
   try
   {
      
      // Generate a signing key.
      RSACryptoServiceProvider^ Key = gcnew RSACryptoServiceProvider;
      Console::WriteLine( "Signing: {0}", resourceToSign );
      
      // Sign the detached resourceand save the signature in an XML
 file.
      SignDetachedResource( resourceToSign, XmlFileName, Key );
      Console::WriteLine( "XML signature was succesfully computed and saved
 to {0}.", XmlFileName );
      
      // Verify the signature of the signed XML.
      Console::WriteLine( "Verifying signature..." );
      
      //Verify the XML signature in the XML file.
      bool result = VerifyDetachedSignature( XmlFileName );
      
      // 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 );
   }

}
J#
//
// This example signs a file specified by a URI 
// using a detached signature. It then verifies  
// the signed XML.
//
import System.*;
import System.Security.Cryptography.*;
import System.Security.Cryptography.Xml.*;
import System.Text.*;
import System.Xml.*;

class XMLDSIGDetached
{
    /** @attribute STAThread()
     */
    public static void main(String[]
 args)
    {
        // The URI to sign.
        String resourceToSign = "http://www.microsoft.com";

        // The name of the file to which to save the XML signature.
        String xmlFileName = "xmldsig.xml";

        try {
            // Generate a signing key.
            RSACryptoServiceProvider key = new RSACryptoServiceProvider();
            Console.WriteLine("Signing: {0}", resourceToSign);

            // Sign the detached resourceand save the signature in an
 XML file.
            SignDetachedResource(resourceToSign, xmlFileName, key);
            Console.WriteLine("XML signature was succesfully computed "
 
                + "and saved to {0}.", xmlFileName);

            // Verify the signature of the signed XML.
            Console.WriteLine("Verifying signature...");

            //Verify the XML signature in the XML file.
            boolean result = VerifyDetachedSignature(xmlFileName).booleanValue();

            // 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.get_Message());
        }
    } //main

    // Sign an XML file and save the signature in a new file.
    public static void SignDetachedResource(String
 uriString, 
        String xmlSigFileName, RSA key)
    {
        // Create a SignedXml object.
        SignedXml signedXml = new SignedXml();

        // Assign the key to the SignedXml object.
        signedXml.set_SigningKey(key);

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

        // Add the passed URI to the reference object.
        reference.set_Uri(uriString);

        // Add a transformation if the URI is an XML file.
        if (uriString.EndsWith("xml")) {
            reference.AddTransform(new XmlDsigC14NWithCommentsTransform());
        }

        // 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.set_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();

        // Save the signed XML document to a file specified
        // using the passed string.
        XmlTextWriter xmlTW = new XmlTextWriter(xmlSigFileName,
 
            new UTF8Encoding(false));

        xmlDigitalSignature.WriteTo(xmlTW);
        xmlTW.Close();
    } //SignDetachedResource

    // Verify the signature of an XML file and return the result.
    public static Boolean VerifyDetachedSignature(String
 xmlSigFileName)
    {
        // Create a new XML document.
        XmlDocument xmlDocument = new XmlDocument();

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

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

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

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

        // Check the signature and return the result.
        return new Boolean(signedXml.CheckSignature());
    } //VerifyDetachedSignature
} //XMLDSIGDetached

例 2

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


Public Class SignVerifyEnvelope

   Overloads Public Shared
 Sub Main(args() As [String])
      Try
         ' Generate a signing key.
         Dim Key As New
 RSACryptoServiceProvider()
         
         ' 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.
   Public Shared Sub SignXmlFile(FileName
 As String, SignedFileName As
 String, 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
      
      ' 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.
   Public Shared Function
 VerifyXmlFile(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.
   Public Shared Sub CreateSomeXml(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,
 "", "MyElement",
 "samples")
      
      ' Add some text to the node.
      node.InnerText = "Example text to be signed."
      
      ' Append the node to the document.
      document.AppendChild(node)
      
      ' 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 Class
C#
// 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.Xml;
using System.Text;
using System.Xml;

public class SignVerifyEnvelope
{

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

            // 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;

        // 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, "", "MyElement",
 "samples");
        
        // Add some text to the node.
        node.InnerText = "Example text to be signed.";

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

        // Save the XML document to the file name specified.
        XmlTextWriter xmltw = new XmlTextWriter(FileName, new
 UTF8Encoding(false));
        document.WriteTo(xmltw);
        xmltw.Close();
    }
}
C++
// This example signs an XML file using an
// envelope signature. It then verifies the 
// signed XML.
#using <System.Security.dll>
#using <System.Xml.dll>

using namespace System;
using namespace System::Security::Cryptography;
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.
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;
   
   // Create a reference to be signed.
   Reference^ reference = gcnew Reference;
   reference->Uri = "";
   
   // 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( safe_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 ( (doc->FirstChild)->GetType() == XmlDeclaration::typeid
 )
   {
      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.
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 S"Signature" node and create a new
   // XmlNodeList Object*.
   XmlNodeList^ nodeList = xmlDocument->GetElementsByTagName( "Signature"
 );
   
   // Load the signature node.
   signedXml->LoadXml( safe_cast<XmlElement^>(nodeList->Item( 0 )) );
   
   // Check the signature and return the result.
   return signedXml->CheckSignature();
}


// Create example data to sign.
void CreateSomeXml( String^ FileName )
{
   
   // Create a new XmlDocument Object*.
   XmlDocument^ document = gcnew XmlDocument;
   
   // Create a new XmlNode Object*.
   XmlNode^ node = document->CreateNode( XmlNodeType::Element, "", "MyElement",
 "samples" );
   
   // Add some text to the node.
   node->InnerText = "Example text to be signed.";
   
   // Append the node to the document.
   document->AppendChild( node );
   
   // Save the XML document to the file name specified.
   XmlTextWriter^ xmltw = gcnew XmlTextWriter( FileName,gcnew UTF8Encoding( false
 ) );
   document->WriteTo( xmltw );
   xmltw->Close();
}

void main()
{
   try
   {
      
      // Generate a signing key.
      RSACryptoServiceProvider^ Key = gcnew RSACryptoServiceProvider;
      
      // 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 );
   }

}
プラットフォームプラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報バージョン情報
.NET Framework
サポート対象 : 2.0、1.1、1.0
参照参照
関連項目
XmlDsigC14NWithCommentsTransform クラス
XmlDsigC14NWithCommentsTransform メンバ
System.Security.Cryptography.Xml 名前空間

XmlDsigC14NWithCommentsTransform プロパティ


パブリック プロパティパブリック プロパティ

  名前 説明
パブリック プロパティ Algorithm  現在の変換で実行されているアルゴリズムを識別する URI (Uniform Resource Identifier) を取得または設定します。 ( Transform から継承されます。)
パブリック プロパティ Context  現在の Transform オブジェクトが実行されているドキュメント コンテキストを表す XmlElement オブジェクトを取得または設定します。 ( Transform から継承されます。)
パブリック プロパティ InputTypes  現在の XmlDsigC14NTransform オブジェクトの LoadInput メソッドに対する有効な入力の型の配列を取得します。 ( XmlDsigC14NTransform から継承されます。)
パブリック プロパティ OutputTypes  現在の XmlDsigC14NTransform オブジェクトの GetOutput メソッドから出力できる型の配列を取得します。 ( XmlDsigC14NTransform から継承されます。)
パブリック プロパティ PropagatedNamespaces  署名に反映させる名前空間を格納する Hashtable オブジェクトを取得または設定します。 ( Transform から継承されます。)
パブリック プロパティ Resolver  現在の XmlResolver オブジェクトを設定します。 ( Transform から継承されます。)
参照参照

関連項目

XmlDsigC14NWithCommentsTransform クラス
System.Security.Cryptography.Xml 名前空間

XmlDsigC14NWithCommentsTransform メソッド


パブリック メソッドパブリック メソッド

( プロテクト メソッド も参照)
  名前 説明
パブリック メソッド Equals  オーバーロードされます。 2 つの Object インスタンスが等しいかどうかを判断します。 ( Object から継承されます。)
パブリック メソッド GetDigestedOutput  XmlDsigC14NTransform オブジェクトに関連付けられたダイジェストを返します。 ( XmlDsigC14NTransform から継承されます。)
パブリック メソッド GetHashCode  特定の型のハッシュ関数として機能します。GetHashCode は、ハッシュ アルゴリズムや、ハッシュ テーブルのようなデータ構造での使用に適しています。 ( Object から継承されます。)
パブリック メソッド GetOutput  オーバーロードされます。 現在の XmlDsigC14NTransform オブジェクトの出力を返します。 ( XmlDsigC14NTransform から継承されます。)
パブリック メソッド GetType  現在のインスタンスの Type を取得します。 ( Object から継承されます。)
パブリック メソッド GetXml  現在の Transform オブジェクトの XML 表現を返します。 ( Transform から継承されます。)
パブリック メソッド LoadInnerXml  指定した XmlNodeList オブジェクトを <Transform> 要素の変換に固有な内容として解析します。この要素は内部 XML 要素を持たないため、このメソッドはサポートされません。 ( XmlDsigC14NTransform から継承されます。)
パブリック メソッド LoadInput  指定した入力を現在の XmlDsigC14NTransform オブジェクトに読み込みます。 ( XmlDsigC14NTransform から継承されます。)
パブリック メソッド ReferenceEquals  指定した複数の Object インスタンスが同一かどうかを判断します。 ( Object から継承されます。)
パブリック メソッド ToString  現在の Object を表す String を返します。 ( Object から継承されます。)
プロテクト メソッドプロテクト メソッド
  名前 説明
プロテクト メソッド Finalize  Object がガベージ コレクションにより収集される前に、その Object がリソースを解放し、その他のクリーンアップ操作を実行できるようにします。 ( Object から継承されます。)
プロテクト メソッド GetInnerXml  XMLDSIG <Transform> 要素のサブ要素として含めるのに適した、XmlDsigC14NTransform オブジェクトのパラメータの XML 表現を返します。 ( XmlDsigC14NTransform から継承されます。)
プロテクト メソッド MemberwiseClone  現在の Object の簡易コピーを作成します。 ( Object から継承されます。)
参照参照

関連項目

XmlDsigC14NWithCommentsTransform クラス
System.Security.Cryptography.Xml 名前空間

XmlDsigC14NWithCommentsTransform メンバ

W3C (World Wide Web Consortium) によって定義された、デジタル署名の C14N XML 標準化変換をコメント付きで表します。

XmlDsigC14NWithCommentsTransform データ型で公開されるメンバを以下の表に示します。


パブリック コンストラクタパブリック コンストラクタ
  名前 説明
パブリック メソッド XmlDsigC14NWithCommentsTransform XmlDsigC14NWithCommentsTransform クラスの新しいインスタンスを初期化します。
パブリック プロパティパブリック プロパティ
  名前 説明
パブリック プロパティ Algorithm  現在の変換で実行されているアルゴリズムを識別する URI (Uniform Resource Identifier) を取得または設定します。(Transform から継承されます。)
パブリック プロパティ Context  現在の Transform オブジェクトが実行されているドキュメント コンテキストを表す XmlElement オブジェクトを取得または設定します。 (Transform から継承されます。)
パブリック プロパティ InputTypes  現在の XmlDsigC14NTransform オブジェクトの LoadInput メソッドに対する有効な入力の型の配列を取得します。(XmlDsigC14NTransform から継承されます。)
パブリック プロパティ OutputTypes  現在の XmlDsigC14NTransform オブジェクトの GetOutput メソッドから出力できる型の配列を取得します。(XmlDsigC14NTransform から継承されます。)
パブリック プロパティ PropagatedNamespaces  署名に反映させる名前空間を格納する Hashtable オブジェクトを取得または設定します。 (Transform から継承されます。)
パブリック プロパティ Resolver  現在の XmlResolver オブジェクトを設定します。(Transform から継承されます。)
パブリック メソッドパブリック メソッド
( プロテクト メソッド も参照)
  名前 説明
パブリック メソッド Equals  オーバーロードされます。 2 つの Object インスタンスが等しいかどうかを判断します。 (Object から継承されます。)
パブリック メソッド GetDigestedOutput  XmlDsigC14NTransform オブジェクトに関連付けられたダイジェストを返します。 (XmlDsigC14NTransform から継承されます。)
パブリック メソッド GetHashCode  特定の型のハッシュ関数として機能します。GetHashCode は、ハッシュ アルゴリズムや、ハッシュ テーブルのようなデータ構造での使用に適しています。 (Object から継承されます。)
パブリック メソッド GetOutput  オーバーロードされます。 現在の XmlDsigC14NTransform オブジェクトの出力を返します。 (XmlDsigC14NTransform から継承されます。)
パブリック メソッド GetType  現在のインスタンスの Type を取得します。 (Object から継承されます。)
パブリック メソッド GetXml  現在の Transform オブジェクトの XML 表現を返します。 (Transform から継承されます。)
パブリック メソッド LoadInnerXml  指定した XmlNodeList オブジェクトを <Transform> 要素の変換に固有な内容として解析します。この要素は内部 XML 要素を持たないため、このメソッドはサポートされません。 (XmlDsigC14NTransform から継承されます。)
パブリック メソッド LoadInput  指定した入力を現在の XmlDsigC14NTransform オブジェクトに読み込みます。 (XmlDsigC14NTransform から継承されます。)
パブリック メソッド ReferenceEquals  指定した複数の Object インスタンスが同一かどうかを判断します。 (Object から継承されます。)
パブリック メソッド ToString  現在の Object を表す String を返します。 (Object から継承されます。)
プロテクト メソッドプロテクト メソッド
  名前 説明
プロテクト メソッド Finalize  Object がガベージ コレクションにより収集される前に、その Object がリソースを解放し、その他のクリーンアップ操作を実行できるようにします。 (Object から継承されます。)
プロテクト メソッド GetInnerXml  XMLDSIG <Transform> 要素のサブ要素として含めるのに適した、XmlDsigC14NTransform オブジェクトのパラメータの XML 表現を返します。 (XmlDsigC14NTransform から継承されます。)
プロテクト メソッド MemberwiseClone  現在の Object の簡易コピーを作成します。 (Object から継承されます。)
参照参照

関連項目

XmlDsigC14NWithCommentsTransform クラス
System.Security.Cryptography.Xml 名前空間

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「XmlDsigC14NWithCommentsTransform」の関連用語

1
XmlDsigC14NWithCommentsTransform プロパティ
.NET Framework クラス ライブラリ リファレンス
76% |||||

2
XmlDsigC14NWithCommentsTransform メンバ
.NET Framework クラス ライブラリ リファレンス
76% |||||

3
SignedXml.XmlDsigC14NWithCommentsTransformUrl フィールド
.NET Framework クラス ライブラリ リファレンス
52% |||||

4
SignedXml.XmlDsigCanonicalizationWithCommentsUrl フィールド
.NET Framework クラス ライブラリ リファレンス
52% |||||

5
XmlDsigC14NWithCommentsTransform メソッド
.NET Framework クラス ライブラリ リファレンス
52% |||||

6
XmlDsigC14NWithCommentsTransform クラス
.NET Framework クラス ライブラリ リファレンス
52% |||||

7
XmlDsigC14NWithCommentsTransform コンストラクタ
.NET Framework クラス ライブラリ リファレンス
38% |||||

8
XmlDsigC14NTransform クラス
.NET Framework クラス ライブラリ リファレンス
4% |||||

XmlDsigC14NWithCommentsTransformのお隣キーワード

XmlDsigC14NTransform.GetInnerXml メソッド

XmlDsigC14NTransform.GetOutput メソッド

XmlDsigC14NTransform.InputTypes プロパティ

XmlDsigC14NTransform.LoadInnerXml メソッド

XmlDsigC14NTransform.LoadInput メソッド

XmlDsigC14NTransform.OutputTypes プロパティ

XmlDsigC14NWithCommentsTransform

XmlDsigC14NWithCommentsTransform クラス

XmlDsigC14NWithCommentsTransform コンストラクタ

XmlDsigC14NWithCommentsTransform プロパティ

XmlDsigC14NWithCommentsTransform メソッド

XmlDsigC14NWithCommentsTransform メンバ

XmlDsigEnvelopedSignatureTransform クラス

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