Certificate listing with certutil

[sosthene-nitrokey]

To reproduce, from the folder of the repo:

• Install NSS,
• Create a certutil-db folder
• Add to it:
  • pkcs11.txt:

name=NetHSM
library=path/to/repo/target/release/libnethsm_pkcs11.so

• Run `certutil -N -d certutil-db
• Run openssl req -nodes -x509 -days 1825 -newkey rsa:2048 -keyout test.key -out test.crt to generate a test certificate
• Run openssl pkcs12 -export -out test.pk12 -inkey test.key -in test.crt -certfile test.crt to bundle the certificate and the private key
• Run pk12util -i test.pk12 -d certutil-db -h LocalHSM -n test-cert to upload the certfiicate and private key bundle (this required setting the configuration enable_set_attribute_value to be set to true.
• Run certutil -L -d certutil-db/ -h LocalHSM -> not certificate is listed
• Run certutil -L -d certutil-db/ -h all -> the certificate is listed for some reason.

[sosthene-nitrokey]

Fixed by #185