Calvin, Voipmonitor-sniffer has support for Kamailio’s ‘siptrace’ module, but this is useful if your goal is to capture SIP over TLS traffic, I’m not sure if that is the reason you have been asked to capture the DH session keys…
If that's the case, any reason you went with LD_PRELOAD method vs kamailio’s siptrace module? Using the later you still get the sip traffic without the need of messing with OpenSSL. Mind sharing your findings? Joel. On Tue, Feb 27, 2024 at 00:18 Bastian Triller via sr-users < sr-users@lists.kamailio.org> wrote: > Some weeks ago I learned about [1]. Didn't play with it yet though. > > > [1] > https://medium.com/@yunwei356/ebpf-practical-tutorial-capturing-ssl-tls-plain-text-using-uprobe-fccb010cfd64 > > On Tue, Feb 27, 2024, 02:08 Calvin E. via sr-users < > sr-users@lists.kamailio.org> wrote: > >> This was done using the system-provided OpenSSL (Debian 12). It might >> work for tlsa, but I don't know how Kamilio would respond to LD_PRELOAD >> affecting one of its own modules. >> >> If your curious how it works, the code is here: >> https://github.com/voipmonitor/sniffer/blob/master/tools/ssl_keylogger/sslkeylog.cpp >> >> On Fri, Feb 2, 2024 at 1:23 AM Ihor Olkhovskyi via sr-users < >> sr-users@lists.kamailio.org> wrote: >> >>> Calvin, >>> >>> Thanks for sharing this, just a question, do you use system-provided >>> OpenSSL or tlsa ? >>> >>> Le mar. 30 janv. 2024 à 03:00, Calvin E. via sr-users < >>> sr-users@lists.kamailio.org> a écrit : >>> >>>> It turns out the system I was on really >>>> uses /lib/systemd/system/kamailio.service, despite /etc/init.d/kamailio >>>> also existing. >>>> >>>> I was able to make it work by following the Systemd process: >>>> >>>> mkdir /etc/default/kamailio.d/ >>>> edit /etc/default/kamailio.d/voipmonitor >>>> add lines: >>>> SSLKEYLOG_UDP='127.0.0.1:1234' >>>> LD_PRELOAD="/usr/local/src/voipmonitor-git/tools/ssl_keylogger/sslkeylog.so >>>> /usr/lib/x86_64-linux-gnu/libssl.so.3" >>>> >>>> The keys are captured by the VoIPmonitor sniffer and everything works >>>> as expected from there. I'd be happy to explain further to anyone >>>> interested in this setup. >>>> >>>> On Sun, Jan 28, 2024 at 3:20 AM Sergey Safarov <s.safa...@gmail.com> >>>> wrote: >>>> >>>>> You can check this PR >>>>> https://github.com/kamailio/kamailio/pull/2785 >>>>> >>>>> On Fri, Jan 26, 2024 at 8:58 PM Calvin E. via sr-users < >>>>> sr-users@lists.kamailio.org> wrote: >>>>> >>>>>> I've been tasked to use LD_PRELOAD to log SSL keys for TLS >>>>>> connections using a Diffie-Hellman cipher. The first attempt did not >>>>>> work, >>>>>> so I wanted to sanity check whether Kamailio's TLS support is built in >>>>>> such >>>>>> a way that would defeat LD_PRELOAD. >>>>>> >>>>>> The instructions from the vendor are to update /etc/init.d/kamailio >>>>>> like this: >>>>>> >>>>>> env SSLKEYLOG_UDP='127.0.0.1:1234' >>>>>> LD_PRELOAD="/usr/local/src/voipmonitor-git/tools/ssl_keylogger/sslkeylog.so >>>>>> /usr/lib/x86_64-linux-gnu/libssl.so.3" \ >>>>>> start-stop-daemon --start --quiet --pidfile $PIDFILE \ >>>>>> --exec $DAEMON -- $OPTIONS || log_failure_msg " >>>>>> already running" >>>>>> >>>>>> Is there anything special in Kamailio (5.7.3 on Debian 12) that would >>>>>> prevent this from working? Not necessarily something to defeat a >>>>>> keylogger, >>>>>> but maybe the way tls.so gets loaded? >>>>>> >>>>>> The only discrepancy I've noticed is the vendor docs refer >>>>>> to libssl.so.3 not libssl.so.1, but the vendor said that should be OK. >>>>>> >>>>>> I'd love to hear from someone already using VoIPmonitor >>>>>> with Diffie-Hellman ciphers and Kamailio. >>>>>> >>>>>> __________________________________________________________ >>>>>> Kamailio - Users Mailing List - Non Commercial Discussions >>>>>> To unsubscribe send an email to sr-users-le...@lists.kamailio.org >>>>>> Important: keep the mailing list in the recipients, do not reply only >>>>>> to the sender! >>>>>> Edit mailing list options or unsubscribe: >>>>>> >>>>> __________________________________________________________ >>>> Kamailio - Users Mailing List - Non Commercial Discussions >>>> To unsubscribe send an email to sr-users-le...@lists.kamailio.org >>>> Important: keep the mailing list in the recipients, do not reply only >>>> to the sender! >>>> Edit mailing list options or unsubscribe: >>>> >>> >>> >>> -- >>> Best regards, >>> Ihor (Igor) >>> __________________________________________________________ >>> Kamailio - Users Mailing List - Non Commercial Discussions >>> To unsubscribe send an email to sr-users-le...@lists.kamailio.org >>> Important: keep the mailing list in the recipients, do not reply only to >>> the sender! >>> Edit mailing list options or unsubscribe: >>> >> __________________________________________________________ >> Kamailio - Users Mailing List - Non Commercial Discussions >> To unsubscribe send an email to sr-users-le...@lists.kamailio.org >> Important: keep the mailing list in the recipients, do not reply only to >> the sender! >> Edit mailing list options or unsubscribe: >> > __________________________________________________________ > Kamailio - Users Mailing List - Non Commercial Discussions > To unsubscribe send an email to sr-users-le...@lists.kamailio.org > Important: keep the mailing list in the recipients, do not reply only to > the sender! > Edit mailing list options or unsubscribe: >
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