Hi François,
Thanks for responding. Apologies for not including context. I'm using esp-idf v6 which includes mbedtls 4.0. My "application" is a re-usable library that obtains certificates using ACME.
I saw the field in the class definition. I get from your reply it's ok for me to use it.
So let me ask a noob question. How do I use this to produce strings in C or C++ code ? The mbedtls_x509_authority structure consists of buffers in something other than such C/C++ string formats.
Danny
On 6/19/26 13:22, Francois Mace wrote:
Hello Danny,
What is the version of mbed TLS you are using?
I think latest version expose AKI with
mbedtls_x509_authorityauthority_key_id;
as a member of the |mbedtls_x509_crt| class.
Best regards,
François
Le jeu. 18 juin 2026 à 18:05, Danny Backx via mbed-tls mbed-tls@lists.trustedfirmware.org a écrit :
Hi, How can I extract the AKI (Authority Key Identifier) from a certificate using mbedtls ? I could parse the certificate file itself, I guess, but isn't that what mbedtls does? Thanks, Danny https://www.rfc-editor.org/info/rfc5280#section-4.2.1.1 -- Danny Backx - dannybackx@telenet.be -- mbed-tls mailing list -- mbed-tls@lists.trustedfirmware.org To unsubscribe send an email to mbed-tls-leave@lists.trustedfirmware.org