[OpenSIPS-Users] stir shaken verification

[Joseph Jackson]

Hi Marcin,

I suspect you are correct that its how you are decoding the ca cert file from iconectiv.

attached is what we have currently and it works in our production enviroment.

If the maillist strips out that attachment let me know.  You can reach me directly at jjackson at aninetworks.net

Joseph

________________________________
From: Users <users-bounces at lists.opensips.org> on behalf of Marcin Groszek <marcin at voipplus.net>
Sent: Thursday, January 5, 2023 10:16 AM
To: users at lists.opensips.org <users at lists.opensips.org>
Subject: Re: [OpenSIPS-Users] stir shaken verification


Joseph, Thank you very much for your respond.


I have downloaded and apply new sti-ca file but certificate validation fails.

INFO:stir_shaken:verify_callback: certificate validation failed: certificate signature failure
INFO:stir_shaken:w_stir_verify: Invalid certificate
DBG:core:comp_scriptvar: int 26 : -8 / 0
[1637] stir_shaken_verify() failed: 437, Unsupported Credential


Perhaps I am not processing the sti-ca file properly.


I am testing this with a valid token , in fact test calls are coming from major cellular carrier in US and the verification fails.

I can see curl download the public cert, storing it in local cache and then attempt to verify, but it fails.

Upon next call with same token, the public cert is pulled from local cache and still fails.




On 1/4/2023 7:37 PM, Joseph Jackson wrote:
Hi Marcin,

We have a process that downloads the CA list from iconectiv nightly,  decodes the jwt and stores the certs in a single file in /etc/ssl/sti-ca/sti-ca.pem

Here is the opensips modparam

#stir and shaken
loadmodule "stir_shaken.so"
modparam("stir_shaken", "verify_date_freshness", 300)
modparam("stir_shaken", "auth_date_freshness", 300)
modparam("stir_shaken", "e164_strict_mode", 0)
#list of root certs for stir / shaken verification
modparam("stir_shaken", "ca_list", "/etc/ssl/sti-ca/sti-ca.pem")

This is on opensips v3.1.11


________________________________
From: Users <users-bounces at lists.opensips.org><mailto:users-bounces at lists.opensips.org> on behalf of Marcin Groszek <marcin at voipplus.net><mailto:marcin at voipplus.net>
Sent: Wednesday, January 4, 2023 6:12 PM
To: users at lists.opensips.org<mailto:users at lists.opensips.org> <users at lists.opensips.org><mailto:users at lists.opensips.org>
Subject: [OpenSIPS-Users] stir shaken verification


Opensips version 3.1.5

I am having some issues with stir_shaken setup. I am sure this not an issue with the module, but me.

stir_shaken_auth works just fine and I am able to sign the calls, however I was unable to find any document how to use a ca file available for download at iconectiv/download-list as well as via API. They do come in as jwt file, but after little manipulation individual certificates can be extracted, and the first one is the root certificate; I think, and the rest are trusted STI-CA. I guess my question is how do I use this file or any other cert file as "ca_list" and/or "ca_dir" .

After weeks and hundreds attempts I was unsuccessful, and I was unable to locate any document explaining preparation/setup/steps to setup verification.

All I get is :

ERROR:stir_shaken:load_cert: Failed to parse certificate
ERROR:stir_shaken:w_stir_verify: Failed to load certificate
on INVITE with valid identity header.

When I remove or replace  "ca_list" file with something bogus opensips does not even start  with errors:

ERROR:stir_shaken:init_cert_validation: Failed to load trustefd CAs
ERROR:core:init_mod: failed to initialize module stir_shaken

I would really appreciate some guidance on this one.




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--
Best Regards:
Marcin Groszek
Business Phone Service
https://www.voipplus.net
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