/// <summary>
/// Re-apply password to zip contents(recursively)
/// Remove temp files generated by original zip unpacking (and used by action processing)
/// Note: We do NOT re-apply the zip files password here, ReEncryptAttachment() does it at higher level
/// </summary>
/// <param name="zipContainerAttachment"></param>
/// <param name="ui"></param>
/// <param name="cancelSend"></param>
/// <returns></returns>
private bool EncryptZipContents(Attachment zipContainerAttachment, IContentEncryptionUi ui, out bool cancelSend)
{
Logger.LogInfo("EncryptZipContents called for:" + zipContainerAttachment.FileName);
cancelSend = false;
using (var tempFileController = new TempFileController()) // Remember the temp files we generated.
{
for (int i = 0; i < zipContainerAttachment.File.Files.Count; i++) // So we can recreate FCS files on fly
{
IFile file = (IFile) zipContainerAttachment.File.Files[i];
Attachment tmpAttachment = new Attachment(file, "contenttype", file.ContentId, null, false);
// This attachment may be itself a zip; so before we re-encrypt it, we need to re-encrypt its contents.
if (!ProcessContainerContents(tmpAttachment, ui, false, out cancelSend))
{
return false;
}
// Ignore the return value, this will fail if the attachment was not encrypted originally.
ReEncryptAttachment(tmpAttachment);
// Ensure the changes get copied back
zipContainerAttachment.File.Files[i] = tmpAttachment.File;
tempFileController.Add(file.FileName);
}
// Re-create the actual zip file with the now processed files
if (!zipContainerAttachment.File.PackContainer(string.Empty))
// Don't specify a password at this point, allow ReEncryptAttachment()
{
LastErrorText = string.Format("Unable to repack [{0}]", zipContainerAttachment.File.FileName);
Logger.LogError(LastErrorText);
return false;
}
}
return true;
}
protected string GetExtensionForMasqueradingAttachment(OutlookAttachment attachment)
{
if (attachment.FileName.Contains('~')) // only interested in 8.3 formated file names.
{
var extension = Path.GetExtension(attachment.FileName);
if (!string.IsNullOrEmpty(extension))
{
using (var tfc = new TempFileController())
{
var tempfile = tfc.GetTempFilename(extension.TrimStart('.'), true);
attachment.SaveAsFile(tempfile);
using (IFile file = new Workshare.FCS.Lite.Interface.File(tempfile, attachment.DisplayName))
{
switch (file.FileType)
{
case FileType.WordDocumentX:
return "docx";
case FileType.ExcelSheetX:
return "xlsx";
case FileType.PowerPointX:
return "pptx";
}
}
}
}
}
return string.Empty;
}
