[Ffmpeg-devel] [RFC] MXF AES decryption

Michael Niedermayer michaelni
Sat Jan 13 18:24:30 CET 2007


On Sat, Jan 13, 2007 at 02:13:37PM +0100, Reimar D?ffinger wrote:
> Hello,
> updated version.
> Note that it still contains two unrelated hunks:
> the one I sent in "[PATCH] respect type when resolving MXF strong ref"
> and one simplifying klv_decode_ber_length, hope that makes reviewing not
> too inconvenient, if it does just review those before and I'll send a
> new patch after they are applied ;-)
> The key in AVFormatParameters is supposed to be a string for easier
> extensibility and easy way to specify on commandline mostly.

iam unhappy with this, what about per stream keys? and why not simply
pass a uint8_t array? also i hate AVFormatParameters why not use 
AVFormatContext ?

> The current format is just a hex string like "02045a...", 32 characters for
> AES-128 (the only format supported currently).
> IMO openssl should be replaced, it is too bloated for such a simple
> functionality but I'm not yet sure by what, not to mention that I am not
> up to date if it still has such an inconvenient license...

<random bloated crpto lib> dependance for just AES is completely unacceptable
write your own 2 page implementation of AES




for 2 somewhat readable implementations ...

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

While the State exists there can be no freedom; when there is freedom there
will be no State. -- Vladimir Lenin
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