Imports github.com/Sirupsen/logrus github.com/docker/go/canonical/json github.com/docker/notary/trustmanager github.com/docker/notary/tuf/data github.com/docker/notary/tuf/utils github.com/agl/ed25519 Standard library imports crypto crypto/rand crypto/sha256 crypto/x509 errors fmt math/big strings time crypto/ecdsa encoding/pem crypto/rsa