(LDS perspective) How would people before Mormonism have entered heaven since they would not have known the masonic handshakes?

Related question here discusses the secret passwords and handshakes that are, according to LDS church, required in order to gain entrance to heaven. This question and this Wikipedia article discusses their relationship/similarity with Masonic rituals. Even if we accepted the view that Masonic symbolism originated before early Christianity (among the builders of Solomons's temple), I have not yet found any reference in the Bible to specific handshake(s) as a requirement to enter heaven. Unless this is mentioned somewhere in the Bible canon, it looks like early Christians or people living before that did not know of this requirement. How would worshipers of God who died before Joseph Smith have entered heaven since they would not have known the secret passwords or handshakes?