The line after "Host key fingerprint is:" has this format:
keytype bits md5 sha1
What goes to -hostkey is either keytype bits sha1 (more secure) or keytype bits md5.

Though a better way to collect the host key automatically is using Session.ScanFingerprint method:
https://winscp.net/eng/docs/library_session_scanfingerprint

For an example, see
https://winscp.net/eng/docs/library_example_known_hosts

Btw, there's no "Host key offered" message in WinSCP.

I have a number programs working using SFTP in WinSCP, but have a question. I am using a private/public key option (key given to me by the administrator) to connect. Now I am trying to go about adding the host key as well. Currently, I am just using "host-key=*", but what we'd like to do is have a script that reads the log after the first time SFTP is used to grab the host key, stuff it in a file, and have that utilized by all our WinSCP scripts. In the WinSCP logs, at one point it will read



This is not EXACTLY the key offered, but you get the idea. I tried copying the key directly from the log and using it as the host key, but could not get it to work after several different variations. I finally figured out that what WinSCP was looking for as the key was the first line and third line combined:



as further down below it showed "host key offered" as the line above - notably minus the second line that shows when I had "host key=*"

Is that correct? Is there a reason for the log showing "host key offered" and it having that second line in there when I use the wild card as opposed to inputting an actual host key?