I'm currently working with a customer to implement pdf document resigning using Aspose.PDF for .NET.Currently the only facility that I see Aspose.PDF supporting in this vien is a call to completely obliterate a signature field with a given field name (PdfFileSignature.RemoveSignature ( System.String)). This does not help as we want to re-sign the document in the same location with a signature field of the same name.
There are two paths I can see that would support this need.
The first path would be to have an Aspose.PDF interface that simply removes the signature data from the existing signature field and open that existing field back up for resigning.
The other path would be to have an Aspose.PDF interface that would return the rectangle of a signature field when given the signature field name. This would enable the user to delete the old signature field and then add a new field of the same dimensions back into the document at the same location with the same name as the field that was deleted.
The later approach could be used internally to implement the first approach.
This is an immediate need. Please help!