/// <summary>
/// See IDigitalSignatureProvider
/// </summary>
void IDigitalSignatureProvider.RemoveRequestSignature(Guid spotId)
{
AssertIsSignable();
XpsSignatureDefinition definition = FindSignatureDefinition(spotId);
if (definition != null)
{
FixedDocument.RemoveSignatureDefinition(definition);
FixedDocument.CommitSignatureDefinition();
}
// Loop through the signature list and remove the entry for the
// requested signature
foreach (DigitalSignature signature in DigitalSignatureList)
{
if (signature.GuidID == spotId)
{
// We only want to remove unsigned signature definitions
// (requested signatures) and not actual signatures.
if (signature.SignatureState == SignatureStatus.NotSigned)
{
DigitalSignatureList.Remove(signature);
}
// It is safe to remove an element from the list that we're
// currently enumerating because we stop enumerating as soon
// as we find the element we're looking for.
break;
}
}
}
/// <summary>
/// See IDigitalSignatureProvider
/// </summary>
Guid IDigitalSignatureProvider.AddRequestSignature(DigitalSignature digitalSignature)
{
AssertIsSignable();
// Create guid used for signature ID
Guid guidID = Guid.NewGuid();
// Create a new SignatureDefinition
XpsSignatureDefinition xpsSignatureDefinition = new XpsSignatureDefinition();
// Use the digSig to setup the SignatureDefinition.
xpsSignatureDefinition.RequestedSigner = digitalSignature.SubjectName;
xpsSignatureDefinition.Intent = digitalSignature.Reason;
xpsSignatureDefinition.SigningLocale = digitalSignature.Location;
xpsSignatureDefinition.SignBy = digitalSignature.SignedOn;
// Use our new guid to setup the ID
xpsSignatureDefinition.SpotId = guidID;
// Add the signature definition to the document
FixedDocument.AddSignatureDefinition(xpsSignatureDefinition);
FixedDocument.CommitSignatureDefinition();
// Set the signature's status to Not Signed before adding to our list
digitalSignature.SignatureState = SignatureStatus.NotSigned;
// Add the new signature to our list of signatures and definitions
DigitalSignatureList.Add(digitalSignature);
return(guidID);
}
private void SignatureDefinitionCommandHandler(object sender, RoutedEventArgs e)
{
SignatureDefinition sigDefDialog = new SignatureDefinition();
if (sigDefDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
XpsSignatureDefinition signatureDefinition = new XpsSignatureDefinition();
signatureDefinition.RequestedSigner = sigDefDialog.RequestedSigner.Text;
signatureDefinition.Intent = sigDefDialog.Intent.Text;
signatureDefinition.SigningLocale = sigDefDialog.SigningLocale.Text;
try
{
signatureDefinition.SignBy = DateTime.Parse(sigDefDialog.SignBy.Text);
}
catch (FormatException)
{
}
signatureDefinition.SpotId = Guid.NewGuid();
IXpsFixedDocumentSequenceReader docSeq = _xpsDocument.FixedDocumentSequenceReader; //_xpsDocument is type System.Windows.Xps.Packaging.XpsDocument
IXpsFixedDocumentReader doc = docSeq.FixedDocuments[0];
doc.AddSignatureDefinition(signatureDefinition);
doc.CommitSignatureDefinition();
InitializeSignatureDisplay();
}
}
private void SignXPS(string inputFile)
{
try
{
Licensing.ShowDemoMessage();
DigitalCertificate.LogOnEToken(this.DigitalSignatureCertificate);
XpsDocument xpsDocument = new XpsDocument(inputFile, FileAccess.ReadWrite);
if (!this.AllowMultipleSignatures)
{
XpsSignatureDefinition xpsSignatureDefinition = new XpsSignatureDefinition()
{
Intent = this.SigningIntent,
SigningLocale = this.SigningLocation,
SpotId = new Guid?(Guid.NewGuid())
};
IXpsFixedDocumentReader item = xpsDocument.FixedDocumentSequenceReader.FixedDocuments[0];
item.AddSignatureDefinition(xpsSignatureDefinition);
item.CommitSignatureDefinition();
X509Certificate2 digitalSignatureCertificate = this.DigitalSignatureCertificate;
Guid? spotId = xpsSignatureDefinition.SpotId;
xpsDocument.SignDigitally(digitalSignatureCertificate, true, XpsDigSigPartAlteringRestrictions.SignatureOrigin, spotId.Value);
}
else
{
xpsDocument.SignDigitally(this.DigitalSignatureCertificate, true, XpsDigSigPartAlteringRestrictions.None);
}
xpsDocument.Close();
}
catch
{
throw;
}
}
public SignatureDisplayItem AddSignatureItem(XpsSignatureDefinition signatureDefintion)
{
SignatureDisplayItem item = new SignatureDisplayItem();
if (signatureDefintion != null)
{
item.Request = signatureDefintion.RequestedSigner;
item.Intent = signatureDefintion.Intent;
item.SignBy = signatureDefintion.SignBy.ToString();
item.Location = signatureDefintion.SigningLocale;
item.SigId = signatureDefintion.SpotId;
}
this.SignatureList.Items.Add(item);
return(item);
}
/// <summary>
/// Maps an XpsSignatureDefinition to our DigitalSignature.
/// </summary>
/// <param name="signatureDefinition">The signature definition to
/// convert</param>
/// <returns>A DigitalSignature representing a requested signature with
/// signature status NotSigned</returns>
private static DigitalSignature ConvertXpsSignatureDefinition(XpsSignatureDefinition signatureDefinition)
{
//Create new DigSig. This is a request and will have the status NotSigned.
DigitalSignature digitalSignature = new DigitalSignature();
digitalSignature.SignatureState = SignatureStatus.NotSigned;
//set fields using the definition.
digitalSignature.SubjectName = signatureDefinition.RequestedSigner;
digitalSignature.Reason = signatureDefinition.Intent;
digitalSignature.SignedOn = signatureDefinition.SignBy;
digitalSignature.Location = signatureDefinition.SigningLocale;
digitalSignature.GuidID = signatureDefinition.SpotId;
return(digitalSignature);
}
/// <summary>
/// Returns a signature definition in the document that matches a GUID.
/// </summary>
/// <param name="id">The GUID to match</param>
/// <returns>The corresponding signature definition, if one exists.
/// </returns>
private XpsSignatureDefinition FindSignatureDefinition(Guid id)
{
XpsSignatureDefinition definition = null;
// Loop through our collection of definitions and find the matching
// GUID. We only need to look at the fixed document we have saved
// (and not the other documents in the sequence) since we always
// save signature definitions to that fixed document.
foreach (XpsSignatureDefinition signatureDefinition in FixedDocument.SignatureDefinitions)
{
if (signatureDefinition.SpotId == id)
{
definition = signatureDefinition;
break;
}
}
return(definition);
}
private void SignXPSStream(Stream inputStream)
{
try
{
Licensing.ShowDemoMessage();
DigitalCertificate.LogOnEToken(this.DigitalSignatureCertificate);
using (Package package = Package.Open(inputStream, FileMode.Open, FileAccess.ReadWrite))
{
string str = "memorystream://myXps.xps";
Uri uri = new Uri(str);
PackageStore.AddPackage(uri, package);
XpsDocument xpsDocument = new XpsDocument(package, CompressionOption.Maximum, str);
if (!this.AllowMultipleSignatures)
{
XpsSignatureDefinition xpsSignatureDefinition = new XpsSignatureDefinition()
{
Intent = this.SigningIntent,
SigningLocale = this.SigningLocation,
SpotId = new Guid?(Guid.NewGuid())
};
IXpsFixedDocumentReader item = xpsDocument.FixedDocumentSequenceReader.FixedDocuments[0];
item.AddSignatureDefinition(xpsSignatureDefinition);
item.CommitSignatureDefinition();
X509Certificate2 digitalSignatureCertificate = this.DigitalSignatureCertificate;
Guid? spotId = xpsSignatureDefinition.SpotId;
xpsDocument.SignDigitally(digitalSignatureCertificate, true, XpsDigSigPartAlteringRestrictions.SignatureOrigin, spotId.Value);
}
else
{
xpsDocument.SignDigitally(this.DigitalSignatureCertificate, true, XpsDigSigPartAlteringRestrictions.None);
}
PackageStore.RemovePackage(uri);
xpsDocument.Close();
}
}
catch
{
throw;
}
}
//------------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
/// <summary>
/// Returns a list of all the DigitalSignature objects from the package.
/// </summary>
/// <returns>A list of DigitalSignature objects</returns>
private IList <DigitalSignature> GetSignaturesFromPackage()
{
IList <DigitalSignature> signatureList = new List <DigitalSignature>();
// This will contain a mapping of GUIDs to signature definitions so
// that we can easily look up the signature definition (if any) that
// corresponds with a signature
IDictionary <Guid, XpsSignatureDefinition> signatureDefinitionMap =
new Dictionary <Guid, XpsSignatureDefinition>();
// This will contain a list of all the signature definitions that do
// not have an associated GUID, which means that they have to be
// requested signatures
IList <XpsSignatureDefinition> requestedSignatureList =
new List <XpsSignatureDefinition>();
// Enumerate all the signature definitions in all of the fixed
// documents in the XPS document to generate the map of GUIDs to
// signature definitions
foreach (IXpsFixedDocumentReader fixedDocument in FixedDocumentSequence.FixedDocuments)
{
ICollection <XpsSignatureDefinition> documentSignatureDefinitionList =
fixedDocument.SignatureDefinitions;
if (documentSignatureDefinitionList != null)
{
// Add each signature definition to either the GUID map or
// the list of requested signatures
foreach (XpsSignatureDefinition signatureDefinition in documentSignatureDefinitionList)
{
// If the signature definition has a GUID, add it to the map
if (signatureDefinition.SpotId != null)
{
signatureDefinitionMap.Add(signatureDefinition.SpotId.Value, signatureDefinition);
}
// If it does not have a GUID it cannot match a signature yet,
// so add it to the list of requested signatures
else
{
requestedSignatureList.Add(signatureDefinition);
}
}
}
}
// Now loop through all the XpsDigitalSignatures, matching them with
// signature definitions by GUID to get the signature fields that
// are only found in signature definitions.
foreach (XpsDigitalSignature xpsDigitalSignature in XpsDocument.Signatures)
{
// Convert the XPS signature into our format
DigitalSignature digitalSignature =
ConvertXpsDigitalSignature(xpsDigitalSignature);
// Check if the signature corresponds to a definition by seeing
// if the GUID is in the signature definition map
bool definitionFound =
xpsDigitalSignature.Id.HasValue &&
signatureDefinitionMap.ContainsKey(xpsDigitalSignature.Id.Value);
// If the signature corresponds to a signature definition, copy
// fields from the corresponding definition
if (definitionFound)
{
XpsSignatureDefinition signatureDefinition =
signatureDefinitionMap[xpsDigitalSignature.Id.Value];
// Copy SignatureDefinition fields
digitalSignature.Reason = signatureDefinition.Intent;
digitalSignature.Location = signatureDefinition.SigningLocale;
// Now that we have found a signature that matches this
// signature definition, it can no longer match any other
// signatures by GUID and we can remove it from the map.
signatureDefinitionMap.Remove(xpsDigitalSignature.Id.Value);
}
signatureList.Add(digitalSignature);
}
// What is left over in the signatureDefinitionMap are definitions
// that don't have matching XpsDigSigs. Add these as requested
// signatures.
foreach (XpsSignatureDefinition signatureDefinition in signatureDefinitionMap.Values)
{
//Add this request signature to our list.
signatureList.Add(ConvertXpsSignatureDefinition(signatureDefinition));
}
// Add all the definitions we already knew were requested signatures
foreach (XpsSignatureDefinition definition in requestedSignatureList)
{
//Add this request signature to our list.
signatureList.Add(ConvertXpsSignatureDefinition(definition));
}
return(signatureList);
}
