Hi Pieter,

On Mon, 29 Oct 2018 at 12:14, Pieter Hulshoff
<pieter.hulsh...@technolution.nl> wrote:
> I'm trying to determine the data packet format for AES(-256)-GCM usage. Where 
> can I find documentation describing the data packets (IP, UDP, IV, MAC, 
> encrypted data, etc) for this mode or is someone willing to give me a 
> rundown? I'm familiar with the V1/V2 AES-CBC+HMAC-SHA-256 frame format 
> already, and am trying to determine the differences with regards to 
> AES(-256)-GCM.

It's all in the doxygen:
https://build.openvpn.net/doxygen/group__data__crypto.html

Or if you prefer reading it from the source file:
https://github.com/OpenVPN/openvpn/blob/master/src/openvpn/crypto.h#L87

-Steffan


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