
user nobody; |
worker_processes 1; |
error_log logs/error.log info; |
pid logs/nginx.pid; |
|
events { |
worker_connections 1024; |
multi_accept on; |
} |
|
mail { |
auth_http 192.168.1.44:80/mail/auth.php; |
pop3_capabilities "TOP" "USER"; |
imap_capabilities "IMAP4rev1" "UIDPLUS"; |
|
server { |
listen 110; |
protocol pop3; |
proxy on; |
} |
|
server { |
listen 143; |
protocol imap; |
proxy on; |
} |
} |
<?php |
/* |
Nginx sends headers as |
Auth-User: somuser |
Auth-Pass: somepass |
On my php app server these are seen as |
HTTP_AUTH_USER and HTTP_AUTH_PASS |
*/ |
if (!isset($_SERVER["HTTP_AUTH_USER"] ) || !isset($_SERVER["HTTP_AUTH_PASS"] )){ |
fail(); |
} |
$username=$_SERVER["HTTP_AUTH_USER"] ; |
$userpass=$_SERVER["HTTP_AUTH_PASS"] ; |
$protocol=$_SERVER["HTTP_AUTH_PROTOCOL"] ; |
// default backend port |
$backend_port=110; |
if ($protocol=="imap") { |
$backend_port=143; |
} |
if ($protocol=="smtp") { |
$backend_port=25; |
} |
// nginx likes ip address so if your |
// application gives back hostname, convert it to ip address here |
$backend_ip["mailhost01"] ="192.168.1.22"; |
$backend_ip["mailhost02"] ="192.168.1.33"; |
// Authenticate the user or fail |
if (!authuser($username,$userpass){ |
fail(); |
exit; |
} |
// Get the server for this user if we have reached so far |
$userserver=getmailserver($username); |
// Get the ip address of the server |
// We are assuming that you backend returns hostname |
// We try to get the ip else return what we got back |
$server_ip=(isset($backend_ip[$userserver] )?$backend_ip[$userserver] :$userserver; |
// Pass! |
pass($server_ip, $backend_port); |
|
//END |
|
|
function authuser($user,$pass){ |
// put your logic here to authen the user to any backend |
// you want (datbase, ldap, etc) |
// for example, we will just return true; |
return true; |
} |
|
function getmailserver($user){ |
// put the logic here to get the mailserver |
// backend for the user. You can get this from |
// some database or ldap etc |
// dummy logic, all users that start with a,c,f and g get mailhost01 |
// the others get mailhost02 |
if in_array(substr($user,0,1), array("a", "c", "f", "g")){ |
return "mailhost01"; |
} else { |
return "mailhost02"; |
} |
} |
|
function fail(){ |
header("Auth-Status: Invalid login or password"); |
exit; |
} |
|
function pass($server,$port){ |
header("Auth-Status: OK"); |
header("Auth-Server: $server"); |
header("Auth-Port: $port"); |
exit; |
} |



