On 2018-09-19 05:18 AM, Guido Günther wrote: > Hi, > On Wed, Jan 10, 2018 at 10:36:51AM +0100, Guido Günther wrote: >> Hi, >> On Wed, Jul 13, 2016 at 10:27:11AM +0200, Guido Günther wrote: >>> On Tue, Aug 24, 2010 at 12:23:52PM +0200, Michael Prokop wrote: >>>> Package: openssh-server >>>> Version: 1:5.5p1-4 >>>> Severity: wishlist >>>> >>>> >>>> I mentioned this issue in my talk "State of Debian (based) Linux >>>> live systems in 2010" at Debconf10. Colin suggested to talk about >>>> it later on, so I'm reporting this as a wishlist item. >>>> >>>> It would be nice if the sshd init script would support generation of >>>> ssh host keys - iff there aren't any keys present yet. >>>> >>>> The (main) use case for this feature are live systems where you >>>> usually don't want to ship pre-generated keys on one hand, on the >>>> other hand not everyone wants to generate the host keys >>>> automatically on each boot (consuming time and ressources). >>>> >>>> Taking care of key generation as someone invokes '/etc/init.d/ssh >>>> start' works fine for the Grml live systems and its users. What >>>> we're doing is something as simple as: >>>> >>>> ,---- [ relevant snipped of Grml's ssh initscript ] >>>> | RSA1_KEY=/etc/ssh/ssh_host_key >>>> | RSA_KEY=/etc/ssh/ssh_host_rsa_key >>>> | DSA_KEY=/etc/ssh/ssh_host_dsa_key >>>> | >>>> | case "$1" in >>>> | start) >>>> | [...] >>>> | if ! test -f $RSA1_KEY ; then >>>> | log_action_msg "Generating SSH1 RSA host key..." >>>> | $KEYGEN -t rsa1 -f $RSA1_KEY -C '' -N '' || exit 1 >>>> | fi >>>> | >>>> | if ! test -f $RSA_KEY ; then >>>> | log_action_msg "Generating SSH RSA host key..." >>>> | $KEYGEN -t rsa -f $RSA_KEY -C '' -N '' || exit 1 >>>> | fi >>>> | >>>> | if ! test -f $DSA_KEY ; then >>>> | log_action_msg "Generating SSH2 DSA host key..." >>>> | $KEYGEN -t dsa -f $DSA_KEY -C '' -N '' || exit 1 >>>> | fi >>>> | [...] >>>> `---- >>>> >>>> Would be great if that feature would be available in Debian/Ubuntu >>>> based (live) systems as well. :) >>> >>> I wonder if we should just create a openssh-host-keys package that ships >>> a systemd unit/init script to create the keys (as (I think it was >>> Christian) suggested at debconf. >>> >>> This just came up here as well >>> >>> https://www.redhat.com/archives/libguestfs/2016-July/msg00090.html >>> >> >> Michael is grml working around this somehow? If so can you attach a >> link? > > I have moved things into a Debian package now: > > https://source.puri.sm/Librem5/gen-sshd-host-keys
Have you tried "ssh-keygen -A" ? I believe it would be the simplest way to generated the missing host keys. Regards, Simon