user authentication with nginx

Bob Stanton farseas at
Sun Aug 19 21:32:02 UTC 2012

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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