Donkey is an alternative for S/KEY’s “key” command. This means that donkey is also an alternative for “keyinit”. Since the entry is printed to stdout (not to /etc/skeykeys), you can easily send it to remote operator by e-mail (with PGP signature or something). So, it is possible to initiate S/KEY without login from the console of the host.
for interactive mode type in donkey -i and it will walk you through the process: