Can Kiota be used to build PHP-based SN+I client authentication ?

[v-rimiller]

Our application is built in PHP, and we haven't been able to locate a suitable client library for integrating this feature. Is it possible to use Kiota for SN+I (Subject Name + Issuer) client authentication flows in PHP, and if so are there any examples?

[baywet]

Thanks for using kiota and for reaching out.
The default kiota implementation for PHP and the Microsoft Identity Platform uses phpleague under the hood as there's no MSAL/azure identity package for PHP.
We already offer a ClientCrendetialsCertificateContext which would be the closest to what you need in this context.
I believe the only part that'd be missing at this point to support SNI would be to have this context implementation send the certificate chain (only the certificates + public keys) during the token acquisition phase.

@Ndiritu and @SilasKenneth to confirm