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