Hello,

I noticed a similar behaviour, long startup times if you use multi-megabyte CRL files (like the system default one).

One simple workaround is to use a smaller CRL file that just includes the necessary Cas.

But the code could be probably also improved, maybe it is possible to parallelize it. You can open a feature request about it, or even better, a pull request.

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

From: sr-users <sr-users-bounces@lists.kamailio.org> On Behalf Of mahesh b
Sent: Sunday, May 3, 2020 4:30 AM
To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Subject: [SR-Users] load_crl takes 90 seconds to complete it execution with crl file size of 4MB !!!

Hi All,

        Am using Kamailio 5.1.9 version, In my tls.cfg i have one client and server profile,

along with default client and server profile.

I have crl enabled for the non default client and server profile , the crl file size is 4 MB in my case.

I have 22 child tcp process.

With this what i observe is load_crl is taking close to 90 seconds to finish its execution and return.

It is very clear from the code, its because of this for loop.

 procs_no=get_max_procs();
for(i = 0; i < procs_no; i++) {
if (SSL_CTX_load_verify_locations(d->ctx[i], d->crl_file.s, 0) != 1) {
ERR("%s: Unable to load certificate revocation list '%s'\n",
tls_domain_str(d), d->crl_file.s);
TLS_ERR("load_crl:");
return -1;
}
store = SSL_CTX_get_cert_store(d->ctx[i]);
X509_STORE_set_flags(store,
X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL);
}

Is there a way this can be enhanced or as per the current kamailio design this is a must to do for each and every profile and the child process array list.

Please suggest, is it justifiable for load_crl to take 90 seconds , to complete its execution, with one client and server profile and 22 child tcp process and crl file size of 4MB.

More info of my setup:

-----------------------------

Kamailio 5.1.9 version is running on the below 

Linux Kernel version :  3.10.0-693.el7.x86_64

Centos version : CentOS Linux release 7.4.1708 (Core)

CPU : 2 cores with model name      : Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz

[root@miv5000 ~]# cat /proc/meminfo
MemTotal:        3882076 kB
MemFree:          811244 kB
MemAvailable:    2320356 kB

Openssl verison : OpenSSL 1.0.2k-fips  26 Jan 2017

Regards,

Mahesh.B