try use ngx_lua module, in lua code check the db password etc.
example http 401 auth (simple chinse version):
http://chenxiaoyu.org/2012/02/08/nginx-lua-401-auth.html
--
blog: http://chenxiaoyu.org



On Mon, Aug 20, 2012 at 5:32 AM, Bob Stanton <farseas@gmail.com> wrote:

> I want to find a secure but simple method for authenticating users in an
> Nginx environment.
>
> I have succeeded in figuring out the auth_basic mod but that does not meet
> my needs.
>
> I specifically want to supply my own form, get the username and PW, check
> it against my DB with a CGI program, and then pass values back to Nginx.
>
> I need explained examples for nginx.conf. I can write my own backend in C
> for authentication, that is not part of my question.
>
> 1) What should nginx.conf look like?
> 2) How are values passed back to nginx? signals? function return codes?
>
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