// newServiceAccountAuthenticator returns an authenticator.Request or an error
func newServiceAccountAuthenticator(keyfile string, lookup bool, helper tools.EtcdHelper) (authenticator.Request, error) {
publicKey, err := serviceaccount.ReadPublicKey(keyfile)
if err != nil {
return nil, err
}
var serviceAccountGetter serviceaccount.ServiceAccountTokenGetter
if lookup {
// If we need to look up service accounts and tokens,
// go directly to etcd to avoid recursive auth insanity
serviceAccountGetter = serviceaccount.NewGetterFromEtcdHelper(helper)
}
tokenAuthenticator := serviceaccount.JWTTokenAuthenticator([]*rsa.PublicKey{publicKey}, lookup, serviceAccountGetter)
return bearertoken.New(tokenAuthenticator), nil
}
// IsValidServiceAccountKeyFile returns true if a valid public RSA key can be read from the given file
func IsValidServiceAccountKeyFile(file string) bool {
_, err := serviceaccount.ReadPublicKey(file)
return err == nil
}