Ludvig Michaelsson

Thank you for your contribution! Before having a more in-depth look, may I ask what authenticator you are testing this against?

> How to debug this? sd_bus_default_system just takes a pointer to a variable on the stack to write some output into this, so nothing scary. Can this be resolved to...

Hi, Please see the [YubiKey FIPS 4-series technical manual, section 2.5 U2F](https://support.yubico.com/hc/en-us/articles/360016649199-YubiKey-FIPS-4-Series-Technical-Manual). The device must have a PIN set, through a proprietary instruction, and then unlocked by the user (once...

> From what I read, looks like we need to unlock the device only for registration Yes, that is correct. > But when there are multiple keys, we need to...

Closing this for now. Feel free to re-open if this is still an issue.

Hm, wouldn't it be preferred to honor the environment's wishes for a specific `_FORTIFY_SOURCE` level?

> I've looked at https://github.com/Yubico/libfido2/commit/fadcc9847b137b2ddff64e7853c1c83ec2152806 introducing this option and have assumed, that its desired. It should be seen as our desired default for release builds at this time. But I'd...