<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi<div class=""><br class=""></div><div class="">Looking at the libssl docs it looks like the require/verify setting triggers the client cert request to be sent. When set to ‘verify none' no request is sent.</div><div class=""><br class=""></div><div class="">Either way the Yealink seems to be ignoring the request.<br class=""><div><br class=""></div><div>As always, thanks for your assistance</div><div><br class=""></div><div>Mark</div><div><br class=""><blockquote type="cite" class=""><div class="">On 3 Jul 2020, at 11:38, Daniel-Constantin Mierla <<a href="mailto:miconda@gmail.com" class="">miconda@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><p style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Hello,<br class=""></p><div class="moz-cite-prefix" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">On 03.07.20 11:12, Mark Boyce wrote:<br class=""></div><blockquote type="cite" cite="mid:223BC3C3-2BFD-4F5A-A3D9-86798B8EFB40@darkorigins.com" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Hi Daniel<div class=""><br class=""></div><div class="">Ah, that’s the bit I misunderstood. I thought that require_certificate would trigger mutual auth / mTLS rather than enforcing its presence.</div></blockquote><p style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">well, the server indicates it wants to see client certificate during the handshake, but it has no control in forcing the client to do so. From Kamailio point of view, all this is done by underlying libssl used by tls module. The result after handshake, based on the error message, is that client didn't present any certificate.</p><p style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Typically the clients do not present their certificate by default, there has to be some configuration for that. From my experience, the hardphones have certificates only for provisioning/management APIs.</p><p style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">For SIP, there has an option of uploading the client side certificate, because it has to match somehow the SIP user and SIP service to be able to do proper mutual TLS authentication.</p><p style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Cheers,<br class="">Daniel<br class=""></p><blockquote type="cite" cite="mid:223BC3C3-2BFD-4F5A-A3D9-86798B8EFB40@darkorigins.com" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div class=""><br class=""></div><div class="">No sign of a setting on the Yealink to send it’s certificate. Will go unpack a Cisco and see what that offers.</div><div class=""><br class=""></div><div class="">Thanks</div><div class="">Mark, </div><div class=""><br class=""></div><div class=""><div class=""><blockquote type="cite" class=""><div class="">On 3 Jul 2020, at 09:09, Daniel-Constantin Mierla <<a href="mailto:miconda@gmail.com" class="" moz-do-not-send="true">miconda@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><p class="">Hello,</p><p class="">the client has to be configured to present a certificate, and it doesn't do it based on kamailio log message:</p><p class="">INFO: tls [tls_server.c:445]: tls_accept(): tls_accept: client did not present a certificate</p><p class="">Check the phone config to see if you can set such option. Kamailio can just see if a certificate is sent and if not reject the connection, if you have require_certificate = yes in the server profile of tls.cfg</p><p class="">You can eventually test with 'openssl s_client ...' to see details of client side certs in kamailio -- iirc, it has the options to specify client side certificate with -cert ... -key ...<br class=""></p><p class="">Cheers,<br class="">Daniel<br class=""></p><div class="moz-cite-prefix">On 03.07.20 09:52, Mark Boyce wrote:<br class=""></div><blockquote type="cite" cite="mid:D9767AFF-6B96-4E40-B288-089DCB94208A@darkorigins.com" class="">Hi Daniel<div class=""><br class=""></div><div class="">I’m testing with a Yealink T57W. It comes with a factory install certificate which will probably fail validation as the common name is the MAC. <br class=""><div class=""><br class=""></div><div class="">I'm not trying validate the client device’s certificate just get it to offer what it has so I can check the details.</div><div class=""><br class=""></div><div class="">Thanks</div><div class="">Mark</div><div class=""><br class=""><blockquote type="cite" class=""><div class="">On 3 Jul 2020, at 08:38, Daniel-Constantin Mierla <<a href="mailto:miconda@gmail.com" class="" moz-do-not-send="true">miconda@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><p class="">Hello,</p><p class="">what is the SIP client app you used? Is it configured to use its own tls certificate when connecting to the SIP server?</p><p class="">Cheers,<br class="">Daniel<br class=""></p><div class="moz-cite-prefix">On 02.07.20 18:51, Mark Boyce wrote:<br class=""></div><blockquote type="cite" cite="mid:C53EF2BF-A770-4FA1-8B63-FB7B34CA40E7@darkorigins.com" class="">Hi all<div class=""><br class=""></div><div class="">Been trying to grab the TLS cert details from incoming connections, but failing :-(</div><div class=""><br class=""></div><div class="">So with lines just before AUTH is called like this;</div><div class=""><br class=""></div><div class=""><div class=""> <span class="Apple-converted-space"> </span>if (proto == TLS) {</div><div class=""> <span class="Apple-converted-space"> </span>xlog("L_INFO", "TLSDUMP $ci peer_subject : $tls_peer_subject\n");</div></div><div class=""><br class=""></div><div class="">Gets met with a log line line this;</div><div class=""><br class=""></div><div class="">INFO: tls [tls_server.c:431]: tls_accept(): tls_accept: new connection from 1.2.3.4:11797 using TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256</div><div class="">INFO: tls [tls_server.c:434]: tls_accept(): tls_accept: local socket: 5.6.7.8:5061</div><div class="">INFO: tls [tls_server.c:445]: tls_accept(): tls_accept: client did not present a certificate</div><div class="">...</div><div class="">INFO: tls [tls_select.c:168]: get_cert(): Unable to retrieve peer TLS certificate from SSL structure</div><div class=""><br class=""></div><div class="">This is with verify_certificate and require_certificate set to no in tls.cfg</div><div class=""><br class=""></div><div class="">If I try and set the following in tls.cfg</div><div class=""><br class=""></div><div class=""><div class="">[server:default]</div><div class="">method = TLSv1.2+</div><div class="">verify_certificate = no</div><div class="">require_certificate = yes</div><div class=""><br class=""></div><div class="">I see in the logs;</div><div class=""><br class=""></div><div class=""><div class="">INFO: tls [tls_domain.c:303]: ksr_tls_fill_missing(): TLSs<default>: tls_method=22</div><div class="">INFO: tls [tls_domain.c:315]: ksr_tls_fill_missing(): TLSs<default>: certificate='/etc/kamailio/tls-certs/cert.pem'</div><div class="">INFO: tls [tls_domain.c:322]: ksr_tls_fill_missing(): TLSs<default>: ca_list='(null)'</div><div class="">INFO: tls [tls_domain.c:329]: ksr_tls_fill_missing(): TLSs<default>: crl='(null)'</div><div class="">INFO: tls [tls_domain.c:333]: ksr_tls_fill_missing(): TLSs<default>:<span class="Apple-converted-space"> </span><b class="">require_certificate=1</b></div><div class="">INFO: tls [tls_domain.c:340]: ksr_tls_fill_missing(): TLSs<default>: cipher_list='(null)'</div><div class="">INFO: tls [tls_domain.c:347]: ksr_tls_fill_missing(): TLSs<default>: private_key='/etc/kamailio/tls-certs/privkey.pem'</div><div class="">INFO: tls [tls_domain.c:351]: ksr_tls_fill_missing(): TLSs<default>:<span class="Apple-converted-space"> </span><b class="">verify_certificate=0</b></div><div class="">INFO: tls [tls_domain.c:354]: ksr_tls_fill_missing(): TLSs<default>: verify_depth=9</div><div class="">NOTICE: tls [tls_domain.c:1095]: ksr_tls_fix_domain(): registered server_name callback handler for socket [:0], server_name='<default>' ...</div><div class="">INFO: tls [tls_domain.c:692]: set_verification(): TLSs<default>:<b class=""><span class="Apple-converted-space"> </span>Client MUST present valid certificate</b></div><div class="">INFO: tls [tls_domain.c:303]: ksr_tls_fill_missing(): TLSc<default>: tls_method=20</div><div class="">INFO: tls [tls_domain.c:315]: ksr_tls_fill_missing(): TLSc<default>: certificate='(null)'</div><div class="">INFO: tls [tls_domain.c:322]: ksr_tls_fill_missing(): TLSc<default>: ca_list='(null)'</div><div class="">INFO: tls [tls_domain.c:329]: ksr_tls_fill_missing(): TLSc<default>: crl='(null)'</div><div class="">INFO: tls [tls_domain.c:333]: ksr_tls_fill_missing(): TLSc<default>:<span class="Apple-converted-space"> </span><b class="">require_certificate=1</b></div><div class="">INFO: tls [tls_domain.c:340]: ksr_tls_fill_missing(): TLSc<default>: cipher_list='(null)'</div><div class="">INFO: tls [tls_domain.c:347]: ksr_tls_fill_missing(): TLSc<default>: private_key='(null)'</div><div class="">INFO: tls [tls_domain.c:351]: ksr_tls_fill_missing(): TLSc<default>:<span class="Apple-converted-space"> </span><b class="">verify_certificate=1</b></div><div class="">INFO: tls [tls_domain.c:354]: ksr_tls_fill_missing(): TLSc<default>: verify_depth=9</div><div class="">INFO: tls [tls_domain.c:692]: set_verification(): TLSc<default>:<span class="Apple-converted-space"> </span><b class="">Server MUST present valid certificate</b></div><div class="">...</div><div class="">ERROR: tls [tls_util.h:42]: tls_err_ret(): TLS accept:error:1417C086:SSL routines:tls_process_client_certificate:certificate verify failed</div></div><div class=""><br class=""></div><div class="">Which looks like verification is being enabled when I add require?</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">Would someone be kind enough to point out what I am missing please? (Assuming it’s not a bug :-)</div><div class=""><br class=""></div><div class=""><br class=""></div></div></blockquote></div></div></blockquote></div></div></blockquote></div></div></blockquote></div><br class=""></div></blockquote><pre class="moz-signature" cols="72" style="caret-color: rgb(0, 0, 0); font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">--
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com/">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Funding: <a class="moz-txt-link-freetext" href="https://www.paypal.me/dcmierla">https://www.paypal.me/dcmierla</a></pre></div></blockquote></div><br class=""><div class="">
Best regards<br class="">Mark<br class="">-- <br class="">Mark Boyce<br class="">Dark Origins Ltd<br class="">e: <a href="mailto:mark@darkorigins.com" class="">mark@darkorigins.com</a><br class="">t: 0345 0043 043<br class="">f: 0345 0043 044
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