[Swan] SUCCESS Re: NEW PROBLEM Re: IKEv2 PAM auth failure - how it's done properly?

Mirsad Goran Todorovac mirsad.todorovac at alu.unizg.hr
Tue Jan 25 22:45:17 EET 2022


Here is the link to my diff for your review if you have patience and 
time. It is meant to be a rather minimal one: 

So I can map cert to username in PHP cgi-bin and verify if the user 
exists. If the CN= contains a '@' I would get the username from there, 
to allow for your hack as well, as I plan to introduce it to the future 
certificates issued.

However, I still don't have a clue how to tell Linux to update utmp and 
what should the RHOST be, where do you set that from (which subsystem 
sets that so you read it with pam_get_item(pamh, PAM_RHOST, (const void 

Obviously, I'm new to this and I need to do more homeworks to catch up 
on the things ...

On 1/25/2022 4:24 AM, Paul Wouters wrote:
> On Mon, 24 Jan 2022, Mirsad Goran Todorovac wrote:
>> I can publish a patch diff. I have really made very small 
>> modifications. A couple of lines.
>> I would also want to map certificate subject lines to unix usernames, 
>> put the user into utmp and display the connected user with `w`
>> or `who` commands. But I'm not sure how it's done yet.
> Attached is what I had gobbled together to pull IDs from certificates 
> inside pam_url for IKEv2.
>> Maybe I should think of forking pam_url and supplying a Debian .deb 
>> package, since only .rpm exists in the wild?
> I don't think it is well maintained or active upstream?
>> pam-authenticate is a very practical method of access control. I 
>> would like to clear the doubts that it decreased the security of
>> IKEv2 VPN, and that it is unprofessional, because pam_url calls a 
>> cgi-bin script in .php over a TLSv1.3 connection.
> It still beats 10 round trips of EAPTLS on Windows :)
> Paul

Mirsad Goran Todorovac
CARNet sistem inženjer
Grafički fakultet | Akademija likovnih umjetnosti
Sveučilište u Zagrebu
CARNet system engineer
Faculty of Graphic Arts | Academy of Fine Arts
University of Zagreb, Republic of Croatia
tel. +385 (0)1 3711 451
mob. +385 91 57 88 355

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