Hello,
iirc, the auth header related variables (like $ar) are set when some
authentication functions are used, but that is for requests. For
replies, I am not sure if it is done at all, being also a different
header name.
Unless you want to dig a bit in the code and see what happens there, for
now a solution here would be using transformations to extract fields
from the header Proxy-Authenticate or WWW-Authenticate.
If you want to have these variables set in other cases than it is now,
you can open a new feature request on github issue tracker.
Cheers,
Daniel
On 20.01.19 12:58, Mack Hendricks wrote:
Hey All,
So, I want to use the UAC module to handle Digest Auth to upstream
carriers. But, I don’t know which carrier will be selected until
another module (dRouting in this case) tells the logic which carrier
to use.
I can see in the logs that the uac_auth function can capture the Auth
Realm. But, I need to access it from the Kamailio script so that I
can lookup the credentials for that realm and then call uac_auth.
I’ve tried getting the info from $ar, but that gives me the realm of
the inbound request versus the realm of the upstream carrier. Also,
I’ve tried using $T_rpl($ar), but that returns 0. Here’s my logic
from the Kamailio file:
if(t_check_status("401|407")) {
$var(reply_realm) = $T_rpl($ar);
$var(query)="select auth_username,auth_password from
uacreg where realm='" + $var(reply_realm) + "'";
sql_xquery("cb","$var(query)","rb");
xlog("L_DEBUG","[MANAGE_FAILURE: Proxy Auth]: The
query is $var(query) auth realm is $var(reply_realm) and the user name
is $xavp(rb=>auth_username)");
$avp(auser) = $xavp(rb=>auth_username);
$avp(apass) = $xavp(rb=>auth_password);
uac_auth();
t_relay();
exit;`
}
A snippet of the log file is below:
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: exec: ***
cfgtrace:failure_route=[DEFAULT_ROUTE] c=[/etc/kamailio/kamailio.cfg]
l=1616 a=63 n=assign
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: exec: ***
cfgtrace:failure_route=[DEFAULT_ROUTE] c=[/etc/kamailio/kamailio.cfg]
l=1617 a=63 n=assign
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: exec: ***
cfgtrace:failure_route=[DEFAULT_ROUTE] c=[/etc/kamailio/kamailio.cfg]
l=1618 a=24 n=uac_auth
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: DEBUG: uac
[auth.c:409]: uac_auth(): picked reply is 0x7f900cb7eaf0, code 407
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: DEBUG: uac
[auth.c:225]: get_autenticate_hdr(): looking for header
"Proxy-Authenticate"
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: DEBUG: uac
[auth.c:429]: uac_auth(): header found; body=<Digest
realm="sip.flowroute.com <http://sip.flowroute.com>",
nonce="XERJMlxESAbDNCK3INmBfoET1GGxpcyr", qop="auth">
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: DEBUG: uac
[auth_hdr.c:209]: parse_authenticate_body():
<realm>="sip.flowroute.com <http://sip.flowroute.com>" state=2
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: DEBUG: uac
[auth_hdr.c:209]: parse_authenticate_body():
<nonce>="XERJMlxESAbDNCK3INmBfoET1GGxpcyr" state=3
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: DEBUG: uac
[auth_hdr.c:209]: parse_authenticate_body(): <qop>="auth" state=1
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: DEBUG: uac
[auth.c:449]: uac_auth(): no credential for realm "sip.flowroute.com
<http://sip.flowroute.com>"
Jan 20 10:05:58 dsiprouter /usr/sbin/kamailio[2871]: exec: ***
cfgtrace:failure_route=[DEFAULT_ROUTE] c=[/etc/kamailio/kamailio.cfg]
l=1619 a=24 n=t_relay
Thanks in advance for any help
Mack Hendricks
dSIPRouter
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