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Re: [pdf-devel] Streams: encryption filter
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From: |
jemarch |
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Subject: |
Re: [pdf-devel] Streams: encryption filter |
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Date: |
Sun, 09 Sep 2007 20:35:46 +0200 |
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User-agent: |
Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.8 (Shijō) APEL/10.6 Emacs/22.1.50 (powerpc-unknown-linux-gnu) MULE/5.0 (SAKAKI) |
I am reading the book and i think that I can begin with the two first
links (it is in C) to implement the AES (PDF uses block cipher).
Before I am going to finish reading the chapter of the specification.
Just a note: we can use a single filter implementation to de/encrypt
data in both PDF strings and streams, using both document-level
encryption or stream-specific encryption. Just make sure you have all
needed configuration parameters in the filter configuration, and that
all those parameters exist in the PDF dictionaries.