Lwm2m x509 authentication should validate the full certificate chain during initial DTLS handshake
This feature is an enhancement that should allow a more efficient way to validate a chain of certificates that occur in an advanced manufacturing.
Validating only one level a devices certificate chain is a limitation of the RFC 5280.
Hi Andrew,
this is already planned and partially implemented.
Best regards,
Aaron
Lwm2m Spec 1.2 Supports certificate chains
https://www.openmobilealliance.org/release/LightweightM2M/V1_2-20201110-A/OMA-TS-LightweightM2M_Transport-V1_2-20201110-A.pdf