The relationship between iTextSharp permissions and Acrobat dialogs
- From: steve poling <sdp (at) i2k.com>
- Date: Tue, 07 Nov 2006 15:32:26 -0500
Hi all,
I don't adequately understand the relationship between the permissions
defined by iTextSharp and the related permissions you see when you look
a document's properties' Security. It appears that some permissions
depend upon others, or are overruled by others. To illustrate, open a
PDF file and hit control-D and select the "Security" pane. You'll see a
"Document Restrictions Summary" consisting of 9 items from "Printing" to
"Creation of Template Pages." Moreover, if you click the button "Change
Settings," you'll see another dialog to set open and modify passwords,
and there are additional security settings here. This is what my boss
looks at.
Meanwhile, I'm running iTextSharp, and I see PdfWriter.AllowAssembly
through PdfWriter.AllowScreenReaders that I OR together for use in
conjunction with the Writer's SetEncryption() method. And when I read
back the PDF file, I get the reader.Permissions, just fine. This is what
I look at.
Trouble is that I don't adequately understand the relationship between
the bits of the Permissions flag, and those document restrictions I see
summarized by Adobe Acrobat as document properties. I figure I have to
document this relationship for my boss, or point to someplace else where
it is defined. Is this documented in the PDF Reference v1.6? If so, is
there any clearer statement than the table on page 99-100? Am I barking
up the right tree?
I'm sorry if this is a "how deep is blue" question,
steve
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