Re: [SR-Users] TLS Certificate Verification Issue

Dear Klaus In tls_init.c file there is a function static void ser_free(void *ptr) { shm_free(ptr); } I modified it to static void ser_free(void *ptr) { if(ptr) shm_free(ptr); } Just added a null check. During tls connection close it was close it was crashing. Incase you need to complete stack trace, please let me know, will revert back code chage, reproduce the issue and can get the backtrace. Best Regards kamal On Mon, Oct 29, 2012 at 3:26 PM, Klaus Darilion &lt;klaus.mailinglists(a)pernau.at <mailto:klaus.mailinglists@pernau.at>> wrote: Hi Kamal! If the fix in standard Kamailio code or in code you have written yourself (a proprietary module)? If the problem is in the standard code please send us a diff so we can fix Kamailio. regards Klaus On 29.10.2012 10:53, Kamal Palei wrote: Dear Klaus Forgot to write you back otherday. I was able to trace the code that was crashing. It was trying to free a pointer that was null. I just added a null check. With this change, I am able to keep Kamailio up for longer duration, did not see the crash. Thanks Klaus for your support. kamal On Mon, Oct 29, 2012 at 3:14 PM, Klaus Darilion &lt;klaus.mailinglists(a)pernau.at <mailto:klaus.mailinglists@pernau.at> <mailto:klaus.mailinglists@__pernau.at <mailto:klaus.mailinglists@pernau.at>>> wrote: See also: http://www.kamailio.org/____dokuwiki/doku.php/____troubleshooting:corefiles <http://www.kamailio.org/__dokuwiki/doku.php/__troubleshooting:corefiles> <http://www.kamailio.org/__dokuwiki/doku.php/__troubleshooting:corefiles <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 &lt;klaus.mailinglists(a)pernau.at <mailto:klaus.mailinglists@pernau.at> <mailto:klaus.mailinglists@__pernau.at <mailto:klaus.mailinglists@pernau.at>> <mailto:klaus.mailinglists@ <mailto:klaus.mailinglists@>__p__ernau.at <http://pernau.at/> <mailto:klaus.mailinglists@__pernau.at <mailto:klaus.mailinglists@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@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 &lt;klaus.mailinglists(a)pernau.at <mailto:klaus.mailinglists@pernau.at> <mailto:klaus.mailinglists@__pernau.at <mailto:klaus.mailinglists@pernau.at>> <mailto:klaus.mailinglists@ <mailto:klaus.mailinglists@>__p__ernau.at <http://pernau.at/> <mailto:klaus.mailinglists@__pernau.at <mailto:klaus.mailinglists@pernau.at>>> <mailto:klaus.mailinglists@ <mailto:klaus.mailinglists@> <mailto:klaus.mailinglists@ <mailto:klaus.mailinglists@>>____p__ernau.at <http://p__ernau.at/> <http://pernau.at/> <mailto:klaus.mailinglists@ <mailto:klaus.mailinglists@>__p__ernau.at <http://pernau.at/> <mailto:klaus.mailinglists@__pernau.at <mailto:klaus.mailinglists@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_… <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 <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 <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 <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#ver… <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 <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 <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 <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 <http://115.114.48.75/> <http://115.114.48.75/>>:______443 <http://115.114.48.75:443 <http://115.114.48.75:443/> <http://115.114.48.75:443/>> <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(a)lists.sip-router.org <mailto:sr-users@lists.sip-router.org> <mailto:sr-users@lists.sip-__router.org <mailto:sr-users@lists.sip-router.org>> <mailto:sr-users@lists.sip-____router.org <mailto:sr-users@lists.sip-__router.org> <mailto:sr-users@lists.sip-__router.org <mailto:sr-users@lists.sip-router.org>>> <mailto:sr-users@lists.sip-______router.org <mailto:sr-users@lists.sip-____router.org> <mailto:sr-users@lists.sip-____router.org <mailto:sr-users@lists.sip-__router.org>> <mailto:sr-users@lists.sip-____router.org <mailto:sr-users@lists.sip-__router.org> <mailto:sr-users@lists.sip-__router.org <mailto:sr-users@lists.sip-router.org>>>> http://lists.sip-router.org/________cgi-bin/mailman/listinfo/__sr-______use… <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 <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 <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 <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>>>>