Imports github.com/theupdateframework/notary/tuf/validation github.com/theupdateframework/notary/tuf/utils github.com/theupdateframework/notary github.com/sirupsen/logrus github.com/theupdateframework/notary/tuf/data Standard library imports encoding/pem crypto/sha256 mime/multipart bytes encoding/json errors fmt io io/ioutil net/http net/url os path path/filepath strings