In order to verify signatures, users could upload their certificates and public keys using these routes:
-> for public keys:
/v2/_zot/ext/mgmt?resource=signatures&tool=cosign
-> for certificates:
/v2/_zot/ext/mgmt?resource=signatures&tool=notation&truststoreType=ca&truststoreName=name
Then the public keys will be stored under $rootdir/_cosign and the certificates will be stored under
$rootdir/_notation/truststore/x509/$truststoreType/$truststoreName.
Also, for notation case, the "truststores" field of $rootir/_notation/trustpolicy.json file will be
updated with a new entry "$truststoreType:$truststoreName".
Also based on the uploaded files, the information about the signatures validity will be updated
periodically.
Signed-off-by: Andreea-Lupu <andreealupu1470@yahoo.com>