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| From: | jemarch |
| Subject: | Re: [pdf-devel] Streams: encryption filter |
| Date: | Sun, 09 Sep 2007 19:45:55 +0200 |
| 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 want to help in the project and i saw that in Next is "Streams: Encryption Filter". It was 3 years ago of C programming but i know a lot about encryption in Java. What methods of encryption do you need? I want to try to implement in C. There are two encryption algorithms used in PDF files (for both document-level de/encryption and for specific streams crypt filters): - The RC4 proprietary algorithm that we cannot implement. - The AES (Advanced Encryption Standard) algorithm. The first step is to try to find a suitable implementation of the AES algorithm that we could use. It should be written in C and its license should be GPLv3-compatible. Do you know of a such implementation? If not, how difficult would be to write one?
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