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#!/bin/sh
set -e
showpubkey() {
local keyfile="$1" pubkey
if ! command -v ssh-keygen >/dev/null; then
cat
else
pubkey="$(mktemp --tmpdir -- "${keyfile##*/}-XXXXXXXXXX.pub")"
grep -m1 -E '^(ssh-(rsa|ed25519)|ecdsa-sha2-nistp(256|384|521)) ' >"$pubkey"
ssh-keygen -v -lf "$pubkey" | sed -r "1s@\\S+(\\s+\\([^)]+\\))\$@$keyfile\\1@"
rm -f -- "$pubkey"
fi
}
if [ "$1" = 'configure' ]; then
havehostkey=no
for keytype in rsa ecdsa ed25519; do
keyfile="/etc/dropbear/dropbear_${keytype}_host_key"
if [ -e "$keyfile" ]; then
havehostkey=yes
break
fi
done
if [ "$havehostkey" = no ]; then
# generate host keys (excluding DSS)
for keytype in rsa ecdsa ed25519; do
keyfile="/etc/dropbear/dropbear_${keytype}_host_key"
keyfile_openssh="/etc/ssh/ssh_host_${keytype}_key"
keytype2="$(echo "$keytype" | tr '[a-z]' '[A-Z]')"
if [ -f "$keyfile_openssh" ]; then
echo "Converting existing OpenSSH $keytype2 host key to Dropbear format." >&2
dropbearconvert openssh dropbear "$keyfile_openssh" "$keyfile"
dropbearkey -y -f "$keyfile" | showpubkey "$keyfile"
else
echo "Generating Dropbear $keytype2 host key. Please wait." >&2
dropbearkey -t "$keytype" -f "$keyfile" | showpubkey "$keyfile"
fi
done
fi
fi
#DEBHELPER#
exit 0
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