[Hipsec-rg] Question about IPSec ESP mode of HIP connection

[joseph-so at gmx.net (Joseph)]

Dear Miika,
	Thanks a lot. So in the ESP connection of HIP , during the ESP
connection, what should be put in the "Padding" in the ESP Tailer? Thanks
Joseph 

-----Original Message-----
From: Miika Komu [mailto:miika at iki.fi] 
Sent: Tuesday, November 07, 2006 7:10 PM
To: Joseph
Cc: hipsec-rg at listserv.cybertrust.com
Subject: Re: [Hipsec-rg] Question about IPSec ESP mode of HIP connection

On Tue, 7 Nov 2006, Joseph wrote:

> Dear all,
>    I have one question about the HIP connection. In the ESP connection 
> of HIP, there is a ESP_TRANSFORM parameter in HIP. There is a field 
> called "Padding" in the ESP_TRANSFORM based on the 
> draft-ietf-hip-esp-04.txt. Is this "Padding" same as the "Padding" in 
> the ESP tailer (which is 0-255 bytes)?

No, it is not.

> If yes, during the ESP connection, is it just set the "Padding" in ESP 
> Tailer into 0?

Padding is just padding for the HIP parameter, it has not really any
connection with ESP trailers. See base draft 06 section 5.2.1. According to
the base draft, the padding is just zeroes.

-- 
Miika Komu                                       http://www.iki.fi/miika/