.NET Framework Class Library
ReferenceUri Property

Gets or sets the Uri of the current Reference.

Namespace:   System.Security.Cryptography.Xml
Assembly:  System.Security (in System.Security.dll)
Syntax
Public Property Uri As [%$TOPIC/tbwf7f8c_en-us_VS_110_3_0_0_0_0%]
public [%$TOPIC/tbwf7f8c_en-us_VS_110_3_0_1_0_0%] Uri { get; set; }
public:
property [%$TOPIC/tbwf7f8c_en-us_VS_110_3_0_2_0_0%]^ Uri {
	[%$TOPIC/tbwf7f8c_en-us_VS_110_3_0_2_0_1%]^ get ();
	void set ([%$TOPIC/tbwf7f8c_en-us_VS_110_3_0_2_0_2%]^ value);
}
member Uri : [%$TOPIC/tbwf7f8c_en-us_VS_110_3_0_3_0_0%] with get, set
function get Uri () : [%$TOPIC/tbwf7f8c_en-us_VS_110_3_0_4_0_0%] 
function set Uri (value : [%$TOPIC/tbwf7f8c_en-us_VS_110_3_0_4_0_1%])

Property Value

Type: SystemString
The Uri of the current Reference.
Remarks

The Uri property uses a string Uniform Resource Identifier (URI) to represent the <URI> element of an XML digital signature.

Use the Uri property to specify the location of a document to sign, and to specify which element of the current XML document to sign or to indicate that the entire document should be signed.

To successfully create an XML digital signature, you must set the Uri property. The following table describes the values that you can pass to the Uri property.

Object to sign

Value passed to the Uri property

An entire XML document using an enveloped signature.

An empty string: ""

A specific element within an XML document using an enveloped signature.

The name of an XML element identified by an attribute name ID. The string should take the following form where IDname is the name of a valid attribute name ID:

"#Idname"

A file using a detached signature.

The URI of a file: "c:\data.jpg" or "c:\data.xml".

For more information about XML digital signatures, see the World Wide Web Consortium (W3C) specification at www.w3.org/TR/xmldsig-core/.

Examples

The following code example demonstrates how to generate and verify an enveloped XML signature using the Reference object.

' 
' 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.X509Certificates
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
// 
// 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.
            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();
    }
}
// 
// 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::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. 
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 its 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 "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();
}

int 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 );
   }

}

The following code example demonstrates how to generate and verify a detached XML signature using the Reference object.

' 
' 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 
End Class
// 
// 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();
    }
}
// 
// 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^ Key )
{

   // Create a SignedXml object.
   SignedXml^ signedXml = gcnew SignedXml;

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

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

   // 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 "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();
}



[STAThread]
int main()
{
   array<String^>^args = Environment::GetCommandLineArgs();

   // 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 );
   }

}
Version Information

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1