This is not possible as far as i know. HTTPS is a client/server protocol. What you are asking the firewall to do is to take in unencrypted http traffic and then authenticate and encrypt the traffic before sending it out and decrypting the traffic before sending it back.
You could run a L2L IPSEC tunnel and tunnel the http traffic through that.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...