[OpenSIPS-Users] learning the realm from authentication challenges

[Jeff Pyle]

I'm trying to recover the realm of an auth challenge to OpenSIPS so I can
respond to it with the uac_auth() function, and that requires knowing the
realm.  The docs say that $ar
<https://www.opensips.org/Documentation/Script-CoreVar-3-1#toc6> should
provide that, perhaps written like $(<reply>ar) to get it in the right
context.  I'm having some trouble getting the data.

failure_route[relay_failure] {
...
        if (t_check_status("407")) {
                xlog("L_NOTICE", "[1] Proxy-Authenticate:
$(<reply>hdr(Proxy-Authenticate))\n");
                xlog("L_NOTICE", "[2] Auth Realm: $(<reply>ar)\n");
                xlog("L_NOTICE", "[3] Auth Realm: $ar\n");
        }
...
}

The logs show:

/usr/sbin/opensips[33044]: [1] Proxy-Authenticate: Digest realm="asterisk",
nonce="5f6d42140000936ad820dbcd452e6bcd145777e458dd46dd", qop="auth"
/usr/sbin/opensips[33044]: [2] Auth Realm reply: <null>
/usr/sbin/opensips[33044]: [3] Auth Realm: <null>

Is it possible to get the realm?  Is it possible to build a response with
uac_auth() for an arbitrary authentication challenge?

This is on 3.1.0~20200923~88f89e941.



- Jeff
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