[SR-Users] TLS Certificate Verification Issue
Klaus Darilion
klaus.mailinglists at pernau.at
Mon Oct 29 10:44:57 CET 2012
See also:
http://www.kamailio.org/dokuwiki/doku.php/troubleshooting:corefiles
On 26.10.2012 11:39, Kamal Palei wrote:
> Dear Klaus
> I am little bit new to linux debugging. Please let me know below stuff.
>
> 1. Whats the extension of core file.
The core file does not have an extension, it is usally just called
"core.XXXX" with XXX is the process id of the crashed Kamailio process.
It will reside in the current working directory.
> 2. Will the core files be generated in /home/user path or some other
> default path
In the /etc/init.d/kamailio startup file you can configure the core
pattern to be set before Kamailio is started. Then the core files will
use the defined naming.
On Debian also activate core dumps by editing /etc/default/kamailio
> 3. Do I need to recompile Kamailio source with -g option , or by default
> it is compiled with -g option
From your log file:
0(9548) ALERT: <core> [main.c:745]: core was generated
You see, your binaries already generate core files. Thus, there is no
need to rebuild Kamailio.
> 4. I hope we need to run "ulimit" before we start the program or it is
> not required.
Usually you run "ulimit -c unlimited" before starting the Kamailio
process to be sure that the core will not be truncated.
> My observation is if I run directly kamailio it is crashing, if I run
> with gdb it is not crashing, not sure why this happens.
Strange. But once you have a core file, you can analyze it and generate
the backtrace.
Also make sure to not mix openssl libraries - this is often a a problem.
regards
Klaus
>
> Best Regards
> kamal
>
>
>
> On Thu, Oct 25, 2012 at 8:01 PM, Klaus Darilion
> <klaus.mailinglists at pernau.at <mailto:klaus.mailinglists at pernau.at>> wrote:
>
> SIGABRT 6 Core Abort signal from abort(3)
>
> This means that there was an error condition detected in the
> Kamailio code and the abort(3) function was called. As you see in
> the logs a core file was generated. Find the core file and load it
> into gdb and execute "backtrace". It will show you were the problem
> happened and post it here.
>
> regards
> Klaus
>
>
> On 25.10.2012 16:23, Kamal Palei wrote:
>
> Dear Klaus
> The certificate verification I have disabled.
>
> Facing a new problem.
> When there is a connection reset, that time Kamailio is crashing.
> During crash, I get below logs. Any idea why it is crashing and
> how can
> I avoid it.
>
> /oot at B2BUA:/usr/local/src/__scripts# 9(9557) : <core>
>
> [mem/q_malloc.c:431]: BUG: qm_free: bad pointer (nil) (out of memory
> block!) - aborting
> 0(9548) ALERT: <core> [main.c:742]: child process 9557 exited
> by a
> signal 6
> 0(9548) ALERT: <core> [main.c:745]: core was generated
> 0(9548) INFO: <core> [main.c:757]: INFO: terminating due to
> SIGCHLD
> 6(9554) INFO: <core> [main.c:808]: INFO: signal 15 received
> 8(9556) INFO: <core> [main.c:808]: INFO: signal 15 received
> 4(9552) INFO: <core> [main.c:808]: INFO: signal 15 received
> 5(9553) INFO: <core> [main.c:808]: INFO: signal 15 received
> 3(9551) INFO: <core> [main.c:808]: INFO: signal 15 received
> 7(9555) INFO: <core> [main.c:808]: INFO: signal 15 received
> 1(9549) INFO: <core> [main.c:808]: INFO: signal 15 received
> 2(9550) INFO: <core> [main.c:808]: INFO: signal 15 received
> 0(9548) : <core> [mem/q_malloc.c:431]: BUG: qm_free: bad
> pointer (nil)
> (out of memory block!) - aborting
>
>
> THANKS
> kamal
> /
> On Thu, Oct 25, 2012 at 7:43 PM, Klaus Darilion
> <klaus.mailinglists at pernau.at
> <mailto:klaus.mailinglists at pernau.at>
> <mailto:klaus.mailinglists at __pernau.at
> <mailto:klaus.mailinglists at pernau.at>>> wrote:
>
> Hi Kamal!
>
> Are you familiar with SSL/TLS and certificates? With TLS
> the trust
> between TLS server and TLS client is usually via a trusted
> certification authority (CA). For example, if the
> intermediate proxy
> uses a certificate which is issued by CA FOOBAR-XYZ, the
> you have to
> configure Kamailio to accept certificates singed by
> FOOBAR-XYZ. This
> is done by copying the public root certificate of
> FOOBAR-XYZ to the
> Kamailio server and configure Kamailio to use the FOOBAR-XYZ
> certificate as trusted CA. Of course then you automatically
> also
> trust all others certificates issued by FOOBAR-XYZ.
>
> To configure the trusted CAs use:
> http://kamailio.org/docs/____modules/3.3.x/modules/tls.____html#ca_list
> <http://kamailio.org/docs/__modules/3.3.x/modules/tls.__html#ca_list>
>
>
> <http://kamailio.org/docs/__modules/3.3.x/modules/tls.__html#ca_list
> <http://kamailio.org/docs/modules/3.3.x/modules/tls.html#ca_list>>
>
> You could also disable the certificate validation with:
> http://kamailio.org/docs/____modules/3.3.x/modules/tls.____html#verify_certificate
> <http://kamailio.org/docs/__modules/3.3.x/modules/tls.__html#verify_certificate>
>
>
> <http://kamailio.org/docs/__modules/3.3.x/modules/tls.__html#verify_certificate
> <http://kamailio.org/docs/modules/3.3.x/modules/tls.html#verify_certificate>>
>
> But of course this reduces TLS benefits to encryption-only.
>
> regards
> Klaus
>
>
> On 22.10.2012 13:53, Kamal Palei wrote:
>
> Dear All
> I have modified kamailio,cfg and compiled all the
> modules with TLS
> enabled, and able to bring up the kamailio proxy properly.
>
> Kamailio proxy will receive the REGISTER message from
> endpoints
> in UDP ,
> and want to send this REGISTER message to another
> intermediate
> proxy in
> TLS. For this purpose, I have added few lines in
> kamailio.cfg
> file as below.
>
> I have created the certificates, private keys as
> explained by README
> file in kamailio-3.1.5/modules/tls/ path.
>
> if(is_method("REGISTER"))
> {
> t_relay_to("tls:115.114.48.75
> <http://115.114.48.75>:____443
> <http://115.114.48.75:443>
>
> <http://115.114.48.75:443>");
>
> exit();
> }
>
> Looks like this is taking effect. When Kamailio
> receives REGISTER
> message it is trying to do handshake with intermediate
> proxy.
> I used wireshark to see the handshake messages.
>
> 1. From Kamailio proxy, a TCP SYNC message is going to
> intermediate proxy.
> 2. intermediate proxy sends SYNC + ACK
> 3. Kamailio sends CLIENT HELLO
> 4. intermediate proxy sends SERVER HELLO, CERTIFICATE
> and SERVER
> HELLO DONE
> 5. The Kamailio sends ALERT (Level: Fatal, Description:
> Unknown CA)
> ---> IS something going wrong here..............
> 6. Then Kamailio sends FIN + ACK
>
> Can somebody please let me know why the certificate
> verification
> fails
> (I get this log in console).
> How can I put a work around to avoid certification
> verification
> failure.
>
> Best Regards
> kamal
>
>
>
>
> ___________________________________________________
>
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users
> mailing list
> sr-users at lists.sip-router.org
> <mailto:sr-users at lists.sip-router.org>
> <mailto:sr-users at lists.sip-__router.org
> <mailto:sr-users at lists.sip-router.org>>
> http://lists.sip-router.org/____cgi-bin/mailman/listinfo/sr-____users
> <http://lists.sip-router.org/__cgi-bin/mailman/listinfo/sr-__users>
> <http://lists.sip-router.org/__cgi-bin/mailman/listinfo/sr-__users
> <http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users>>
>
>
>
More information about the sr-users
mailing list