Skip to content

Instantly share code, notes, and snippets.

@catchdave
Last active May 10, 2024 22:46
Show Gist options
  • Save catchdave/69854624a21ac75194706ec20ca61327 to your computer and use it in GitHub Desktop.
Save catchdave/69854624a21ac75194706ec20ca61327 to your computer and use it in GitHub Desktop.
CLI script to programmatically replace SSL certs on Synology NAS
#!/bin/bash
#
# *** For DSM v7.x ***
#
# How to use this script:
# 1. Get your 3 PEM files ready to copy over from your local machine/update server (privkey.pem, fullchain.pem, cert.pem)
# and put into a directory (this will be $CERT_DIRECTORY).
# Personally, I use this script (https://gist.github.com/catchdave/3f6f412bbf0f0cec32469fb0c9747295) to automate steps 1 & 4.
# 2. Ensure you have a user setup on synology that has ssh access (and ssh access is setup).
# This user will need to be able to sudo as root (i.e. add this line to sudoers, <USER> is the user you create):
# <USER> ALL=(ALL) NOPASSWD: /var/services/homes/<USER>/replace_certs.sh
# 3. Copy this script to Synology: sudo scp replace_synology_ssl_certs.sh $USER@$SYNOLOGY_SERVER:~/
# 4. Call this script as follows:
# sudo bash -c scp ${CERT_DIRECTORY}/{privkey,fullchain,cert}.pem $USER@$SYNOLOGY_SERVER:/tmp/ \
# && ssh $USER@$SYNOLOGY_SERVER 'sudo ./replace_synology_ssl_certs.sh'
# Script start.
DEBUG= # Set to any non-empty value to turn on debug mode
error_exit() { echo "[ERROR] $1"; exit 1; }
warn() { echo "[WARN ] $1"; }
info() { echo "[INFO ] $1"; }
debug() { [[ "${DEBUG}" ]] && echo "[DEBUG ] $1"; }
# 1. Initialization
# =================
[[ "$EUID" -ne 0 ]] && error_exit "Please run as root" # Script only works as root
certs_src_dir="/usr/syno/etc/certificate/system/default"
services_to_restart=("nmbd" "avahi" "ldap-server")
packages_to_restart=("ScsiTarget" "SynologyDrive" "WebDAVServer" "ActiveBackup")
target_cert_dirs=(
"/usr/syno/etc/certificate/system/FQDN"
"/usr/local/etc/certificate/ScsiTarget/pkg-scsi-plugin-server/"
"/usr/local/etc/certificate/SynologyDrive/SynologyDrive/"
"/usr/local/etc/certificate/WebDAVServer/webdav/"
"/usr/local/etc/certificate/ActiveBackup/ActiveBackup/"
"/usr/syno/etc/certificate/smbftpd/ftpd/")
# Add the default directory
default_dir_name=$(</usr/syno/etc/certificate/_archive/DEFAULT)
if [[ -n "$default_dir_name" ]]; then
target_cert_dirs+=("/usr/syno/etc/certificate/_archive/${default_dir_name}")
debug "Default cert directory found: '/usr/syno/etc/certificate/_archive/${default_dir_name}'"
else
warn "No default directory found. Probably unusual? Check: 'cat /usr/syno/etc/certificate/_archive/DEFAULT'"
fi
# Add reverse proxy app directories
for proxy in /usr/syno/etc/certificate/ReverseProxy/*/; do
debug "Found proxy dir: ${proxy}"
target_cert_dirs+=("${proxy}")
done
[[ "${DEBUG}" ]] && set -x
# 2. Move and chown certificates from /tmp to default directory
# =============================================================
mv /tmp/{privkey,fullchain,cert}.pem "${certs_src_dir}/" || error_exit "Halting because of error moving files"
chown root:root "${certs_src_dir}/"{privkey,fullchain,cert}.pem || error_exit "Halting because of error chowning files"
info "Certs moved from /tmp & chowned."
# 3. Copy certificates to target directories if they exist
# ========================================================
for target_dir in "${target_cert_dirs[@]}"; do
if [[ ! -d "$target_dir" ]]; then
debug "Target cert directory '$target_dir' not found, skipping..."
continue
fi
info "Copying certificates to '$target_dir'"
if ! (cp "${certs_src_dir}/"{privkey,fullchain,cert}.pem "$target_dir/" && \
chown root:root "$target_dir/"{privkey,fullchain,cert}.pem); then
warn "Error copying or chowning certs to ${target_dir}"
fi
done
# 4. Restart services & packages
# ==============================
info "Rebooting all the things..."
for service in "${services_to_restart[@]}"; do
/usr/syno/bin/synosystemctl restart "$service"
done
for package in "${packages_to_restart[@]}"; do # Restart packages that are installed & turned on
/usr/syno/bin/synopkg is_onoff "$package" 1>/dev/null && /usr/syno/bin/synopkg restart "$package"
done
# Faster ngnix restart (if certs don't appear to be refreshing, change to synosystemctl
if ! (/usr/syno/bin/synow3tool --gen-all && sudo systemctl reload nginx); then
warn "nginx failed to restart"
fi
info "Completed"
@bartowl
Copy link

bartowl commented Apr 10, 2024

Great script. You may also be interested in my old scripts for managing certificates also for other apps like MailStation and co. Recently I added also synow3tool call to be able to reload nginx properly in DSM7. This script presents jsut a slightly different approach and was mainly developed for DSM6. If you have a reliable way of reloading services in the absence of /usr/local/libexec/certificate.d/$subscriber in DSM7 I would really appreciate

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment