[FFmpeg-devel] Fix NTP time in RTCP SR packets

Luca Abeni lucabe72
Mon Feb 18 13:48:22 CET 2008


Hi all,

Luca Abeni wrote:
> Hi Michael,
> 
> Michael Niedermayer wrote:
> [...]
>>> Uh, as I understand it, this sends out the local time with usec
>>> precision. The server sure as hell does not know that, and it could e.g.
>>> be used to guess values if someone uses a stupid random number
>>> generator, system/network load and other things.
>>> IOW this is one of the things everyone planning a side-channel attack
>>> just dreams of.
>> Use time/1000*1000 and you loose less information.
> 
> If this is ok from the security point of view, I think this is the best
> solution... I'll send a patch later

And here is the patch...


			Luca
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: fix-ntp-time-2.diff
URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20080218/2560874e/attachment.txt>



More information about the ffmpeg-devel mailing list