/// <summary>
/// <see cref="MS.Internal.Documents.Application.IDocumentController"/>
/// </summary>
bool IDocumentController.Rebind(Document document)
{
RightsDocument doc = (RightsDocument)document; // see class remarks on why this is ok
Stream ciphered = doc.Dependency.Source;
Stream clear = ciphered;
if (doc.IsRebindNeeded)
{
if (doc.SourcePackage != null)
{
CloseEnvelope(doc.SourcePackage);
doc.SourcePackage = null;
}
EncryptedPackageEnvelope envelope = null;
PackageProperties properties = null;
bool isSourceProtected = doc.IsSourceProtected();
if (isSourceProtected)
{
envelope = OpenEnvelopeOnStream(ciphered);
doc.SourcePackage = envelope;
properties = new SuppressedProperties(envelope);
}
DocumentProperties.Current.SetRightsManagedProperties(properties);
DocumentRightsManagementManager.Current.SetEncryptedPackage(envelope);
if (isSourceProtected)
{
clear = DocumentRightsManagementManager.Current.DecryptPackage();
if (clear != null)
{
clear = new RightsManagementSuppressedStream(
clear,
DocumentRightsManagementManager.Current.HasPermissionToEdit);
// Reset the position of the stream since GetPackageStream will
// create a package and move the stream pointer somewhere else
clear.Position = 0;
}
else
{
Trace.SafeWrite(
Trace.Rights,
"You do not have rights for the current document.");
return(false);
}
}
doc.SourceProxy.Target = clear;
}
return(true);
}
/// <summary>
/// <see cref="MS.Internal.Documents.Application.IDocumentController"/>
/// </summary>
/// <remarks>
/// This method severely breaks encapsulating the chain, however it does
/// so because the requirement breaks encapsulation and the original design
/// of the class only consider streams not properties. The requirement is
/// that as we transition to/from a protected document we copy properties
/// between the layers. It was least risk to compromise the design here
/// then extend it.
/// </remarks>
bool IDocumentController.SavePreperation(Document document)
{
// we don't have to check packageDoc for because we are only responsible
// for PackageDocuments
PackageDocument packageDoc = (PackageDocument)document;
RightsDocument rightsDoc = document.Dependency as RightsDocument;
if (rightsDoc != null)
{
bool isDestinationProtected = rightsDoc.IsDestinationProtected();
bool isSourceProtected = rightsDoc.IsSourceProtected();
// the only time we don't need to copy properties is when
// neither source nor destination is protected as OPC properties
// are copied as parts
// if the source was protected and the destination is not
// then we need to copy properties to the package
if (isSourceProtected && !isDestinationProtected)
{
DocumentProperties.Copy(
new SuppressedProperties(rightsDoc.SourcePackage),
packageDoc.Package.PackageProperties);
}
// if the source was not protected and the destination is
// then we need to copy properties from the package to the envelope
if (!isSourceProtected && isDestinationProtected)
{
DocumentProperties.Copy(
packageDoc.Package.PackageProperties,
new SuppressedProperties(rightsDoc.DestinationPackage));
}
// if they were both protected we need to copy properties
// from the old envelope to the new
if (isDestinationProtected && isSourceProtected)
{
DocumentProperties.Copy(
new SuppressedProperties(rightsDoc.SourcePackage),
new SuppressedProperties(rightsDoc.DestinationPackage));
}
}
return(true);
}
/// <summary>
/// <see cref="MS.Internal.Documents.Application.IDocumentController"/>
/// </summary>
bool IDocumentController.Open(Document document)
{
RightsDocument doc = (RightsDocument)document; // see class remarks on why this is ok
Stream ciphered = doc.Dependency.Source;
Stream clear = ciphered;
bool isSourceProtected = doc.IsSourceProtected();
if (isSourceProtected)
{
// Do not catch exceptions here - there can be no mitigation
EncryptedPackageEnvelope envelope = OpenEnvelopeOnStream(ciphered);
PackageProperties properties = new SuppressedProperties(envelope);
doc.SourcePackage = envelope;
DocumentProperties.Current.SetRightsManagedProperties(properties);
}
RightsManagementProvider provider =
new RightsManagementProvider(doc.SourcePackage);
_provider.Value = provider;
try
{
DocumentRightsManagementManager.Initialize(provider);
DocumentRightsManagementManager.Current.PublishLicenseChange +=
new EventHandler(delegate(object sender, EventArgs args)
{
Trace.SafeWrite(
Trace.Rights,
"Disabling file copy for current document.");
doc.IsFileCopySafe = false;
DocumentManager.CreateDefault().EnableEdit(null);
});
if (isSourceProtected)
{
clear = DocumentRightsManagementManager.Current.DecryptPackage();
if (clear != null)
{
clear = new RightsManagementSuppressedStream(
clear,
DocumentRightsManagementManager.Current.HasPermissionToEdit);
// Reset the position of the stream since GetPackageStream will
// create a package and move the stream pointer somewhere else
clear.Position = 0;
}
else
{
Trace.SafeWrite(
Trace.Rights,
"You do not have rights for the current document.");
return(false);
}
}
}
catch
{
// If anything failed here, we cannot use the provider any longer,
// so we can dispose it
provider.Dispose();
_provider.Value = null;
throw;
}
if (clear != null)
{
doc.SourceProxy = new StreamProxy(clear);
}
else
{
// If decryption failed, we can no longer do anything with the
// provider instance or the current RM manager
provider.Dispose();
_provider.Value = null;
}
return(true);
}
