Current File : /var/lib/dpkg/info/openssh-server.postinst
#!/bin/sh
set -e
. /usr/share/debconf/confmodule
db_version 2.0
action="$1"
umask 022
get_config_option() {
option="$1"
[ -f /etc/ssh/sshd_config ] || return
/usr/sbin/sshd -G | sed -n "s/^$option //Ip"
}
create_key() {
msg="$1"
shift
hostkeys="$1"
shift
file="$1"
shift
if echo "$hostkeys" | grep -x "$file" >/dev/null && \
[ ! -f "$file" ] ; then
printf %s "$msg"
ssh-keygen -q -f "$file" -N '' "$@"
echo
if command -v restorecon >/dev/null 2>&1; then
restorecon "$file" "$file.pub"
fi
ssh-keygen -l -f "$file.pub"
fi
}
create_keys() {
hostkeys="$(get_config_option HostKey)"
create_key "Creating SSH2 RSA key; this may take some time ..." \
"$hostkeys" /etc/ssh/ssh_host_rsa_key -t rsa
create_key "Creating SSH2 DSA key; this may take some time ..." \
"$hostkeys" /etc/ssh/ssh_host_dsa_key -t dsa
create_key "Creating SSH2 ECDSA key; this may take some time ..." \
"$hostkeys" /etc/ssh/ssh_host_ecdsa_key -t ecdsa
create_key "Creating SSH2 ED25519 key; this may take some time ..." \
"$hostkeys" /etc/ssh/ssh_host_ed25519_key -t ed25519
}
new_config=
workaround=
cleanup() {
if [ "$new_config" ]; then
rm -f "$new_config"
fi
if [ "$workaround" ]; then
rm -f "$workaround"
fi
}
create_sshdconfig() {
prev_ver="$1"
# XXX cjwatson 2016-12-24: This debconf template is very confusingly
# named; its description is "Disable SSH password authentication for
# root?", so true -> prohibit-password (the upstream default),
# false -> yes.
db_get openssh-server/permit-root-login
permit_root_login="$RET"
db_get openssh-server/password-authentication
password_authentication="$RET"
trap cleanup EXIT
new_config="$(mktemp)"
cp -aZ /usr/share/openssh/sshd_config "$new_config"
if [ "$permit_root_login" != true ]; then
sed -i 's/^#*PermitRootLogin .*/PermitRootLogin yes/' \
"$new_config"
fi
if [ "$password_authentication" != true ]; then
sed -i 's/^#PasswordAuthentication .*/PasswordAuthentication no/' \
"$new_config"
fi
mkdir -pZ /etc/ssh
# Workaround for LP: #1968873: if we have an sshd_config with a known
# checksum, confirm it via ucf before applying the changes from
# the new version.
if dpkg --compare-versions "$prev_ver" lt-nl 1:9.0p1-1ubuntu7 \
&& grep -q "^$(md5sum /etc/ssh/sshd_config | awk '{ print $1 }')" \
/usr/share/openssh/sshd_config.md5sum
then
workaround="$(mktemp)"
sed -e'14,16d' "$new_config" > "$workaround"
ucf --three-way --debconf-ok \
--sum-file /usr/share/openssh/sshd_config.md5sum \
"$workaround" /etc/ssh/sshd_config
fi
ucf --three-way --debconf-ok \
--sum-file /usr/share/openssh/sshd_config.md5sum \
"$new_config" /etc/ssh/sshd_config
ucfr openssh-server /etc/ssh/sshd_config
}
setup_sshd_user() {
if ! getent passwd sshd >/dev/null; then
adduser --quiet --system --no-create-home --home /run/sshd --shell /usr/sbin/nologin sshd
fi
}
if [ "$action" = configure ]; then
create_sshdconfig "$2"
create_keys
setup_sshd_user
if dpkg --compare-versions "$2" lt-nl 1:7.9p1-5 && \
[ -f /etc/ssh/moduli.dpkg-bak ]; then
# Handle /etc/ssh/moduli being moved from openssh-client to
# openssh-server. If there were no user modifications, then we
# don't need to do anything special here; but if there were,
# then the dpkg-maintscript-helper calls from openssh-client's
# maintainer scripts will have saved the old file as .dpkg-bak,
# which we now move back into place.
mv /etc/ssh/moduli.dpkg-bak /etc/ssh/moduli
fi
if dpkg --compare-versions "$2" lt-nl 1:9.6p1-3ubuntu3~; then
# Remove old socket activation drop-in configurations, if they exist.
if [ -d /etc/systemd/system/ssh.socket.d ]; then
rm -f /etc/systemd/system/ssh.socket.d/addresses.conf
rmdir --ignore-fail-on-non-empty /etc/systemd/system/ssh.socket.d
fi
if [ -d /etc/systemd/system/ssh.service.d ]; then
rm -f /etc/systemd/system/ssh.service.d/00-socket.conf
rmdir --ignore-fail-on-non-empty /etc/systemd/system/ssh.service.d
fi
if [ -d /run/systemd/system ]; then
if dpkg --compare-versions "$2" ge 1:9.3p1-1ubuntu3~ && ! systemctl --quiet is-enabled ssh.socket; then
# If we are upgrading from a version that was
# already migrated, but ssh.socket is disabled,
# then leave it that way.
:
else
# Make sure ssh.service is disabled.
systemctl unmask ssh.service
systemctl disable --now ssh.service > /dev/null 2>&1
# sshd-socket-generator is invoked on daemon-reload.
systemctl daemon-reload
systemctl enable ssh.socket
fi
fi
fi
fi
# Automatically added by dh_installdeb/13.14.1ubuntu5
dpkg-maintscript-helper rm_conffile /etc/network/if-up.d/openssh-server 1:7.9p1-1\~ -- "$@"
# End automatically added section
# Automatically added by dh_installinit/13.14.1ubuntu5
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
if [ -z "${DPKG_ROOT:-}" ] && [ -x "/etc/init.d/ssh" ]; then
update-rc.d ssh defaults >/dev/null
if [ -n "$2" ]; then
_dh_action=restart
else
_dh_action=start
fi
invoke-rc.d --skip-systemd-native ssh $_dh_action || exit 1
fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.14.1ubuntu5
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
# The following line should be removed in trixie or trixie+1
deb-systemd-helper unmask 'ssh.socket' >/dev/null || true
# was-enabled defaults to true, so new installations run enable.
if deb-systemd-helper --quiet was-enabled 'ssh.socket'; then
# Enables the unit on first installation, creates new
# symlinks on upgrades if the unit file has changed.
deb-systemd-helper enable 'ssh.socket' >/dev/null || true
else
# Update the statefile to add new symlinks (if any), which need to be
# cleaned up on purge. Also remove old symlinks.
deb-systemd-helper update-state 'ssh.socket' >/dev/null || true
fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.14.1ubuntu5
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
if deb-systemd-helper debian-installed 'ssh.service'; then
# The following line should be removed in trixie or trixie+1
deb-systemd-helper unmask 'ssh.service' >/dev/null || true
if deb-systemd-helper --quiet was-enabled 'ssh.service'; then
# Create new symlinks, if any.
deb-systemd-helper enable 'ssh.service' >/dev/null || true
fi
fi
# Update the statefile to add new symlinks (if any), which need to be cleaned
# up on purge. Also remove old symlinks.
deb-systemd-helper update-state 'ssh.service' >/dev/null || true
fi
# End automatically added section
if [ -d /run/systemd/system ]; then
# sshd-socket-generator is invoked on daemon-reload.
systemctl daemon-reload
if deb-systemd-helper --quiet was-enabled ssh.socket; then
deb-systemd-invoke restart ssh.socket
elif deb-systemd-helper --quiet was-enabled ssh.service; then
deb-systemd-invoke restart ssh.service
fi
fi
db_stop
exit 0
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