diff options
Diffstat (limited to 'collectors/systemd-journal.plugin/systemd-journal-self-signed-certs.sh')
| -rwxr-xr-x | collectors/systemd-journal.plugin/systemd-journal-self-signed-certs.sh | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/collectors/systemd-journal.plugin/systemd-journal-self-signed-certs.sh b/collectors/systemd-journal.plugin/systemd-journal-self-signed-certs.sh new file mode 100755 index 00000000..ada735f1 --- /dev/null +++ b/collectors/systemd-journal.plugin/systemd-journal-self-signed-certs.sh @@ -0,0 +1,267 @@ +#!/usr/bin/env bash + +me="${0}" +dst="/etc/ssl/systemd-journal" + +show_usage() { + cat <<EOFUSAGE + +${me} [options] server_name alias1 alias2 ... + +server_name + the canonical name of the server on the certificates + +aliasN + a hostname or IP this server is reachable with + DNS names should be like DNS:hostname + IPs should be like IP:1.2.3.4 + Any number of aliases are accepted per server + +options can be: + + -h, --help + show this message + + -d, --directory DIRECTORY + change the default certificates install dir + default: ${dst} + +EOFUSAGE +} + +while [ ! -z "${1}" ]; do + case "${1}" in + -h|--help) + show_usage + exit 0 + ;; + + -d|--directory) + dst="${2}" + echo >&2 "directory set to: ${dst}" + shift + ;; + + *) + break 2 + ;; + esac + + shift +done + +if [ -z "${1}" ]; then + show_usage + exit 1 +fi + + +# Define a regular expression pattern for a valid canonical name +valid_canonical_name_pattern="^[a-zA-Z0-9][a-zA-Z0-9.-]+$" + +# Check if ${1} matches the pattern +if [[ ! "${1}" =~ ${valid_canonical_name_pattern} ]]; then + echo "Certificate name '${1}' is not valid." + exit 1 +fi + +# ----------------------------------------------------------------------------- +# Create the CA + +# stop on all errors +set -e + +if [ $UID -ne 0 ] +then + echo >&2 "Hey! sudo me: sudo ${me}" + exit 1 +fi + +if ! getent group systemd-journal >/dev/null 2>&1; then + echo >&2 "Missing system group: systemd-journal. Did you install systemd-journald?" + exit 1 +fi + +if ! getent passwd systemd-journal-remote >/dev/null 2>&1; then + echo >&2 "Missing system user: systemd-journal-remote. Did you install systemd-journal-remote?" + exit 1 +fi + +if [ ! -d "${dst}" ] +then + mkdir -p "${dst}" + chown systemd-journal-remote:systemd-journal "${dst}" + chmod 750 "${dst}" +fi + +cd "${dst}" + +test ! -f ca.conf && cat >ca.conf <<EOF +[ ca ] +default_ca = CA_default +[ CA_default ] +new_certs_dir = . +certificate = ca.pem +database = ./index +private_key = ca.key +serial = ./serial +default_days = 3650 +default_md = default +policy = policy_anything +[ policy_anything ] +countryName = optional +stateOrProvinceName = optional +localityName = optional +organizationName = optional +organizationalUnitName = optional +commonName = supplied +emailAddress = optional +EOF + +test ! -f index && touch index +test ! -f serial && echo 0001 >serial + +if [ ! -f ca.pem -o ! -f ca.key ]; then + echo >&2 "Generating ca.pem ..." + + openssl req -newkey rsa:2048 -days 3650 -x509 -nodes -out ca.pem -keyout ca.key -subj "/CN=systemd-journal-remote-ca/" + chown systemd-journal-remote:systemd-journal ca.pem + chmod 0640 ca.pem +fi + +# ----------------------------------------------------------------------------- +# Create a server certificate + +generate_server_certificate() { + local cn="${1}"; shift + + if [ ! -f "${cn}.pem" -o ! -f "${cn}.key" ]; then + if [ -z "${*}" ]; then + echo >"${cn}.conf" + else + echo "subjectAltName = $(echo "${@}" | tr " " ",")" >"${cn}.conf" + fi + + echo >&2 "Generating server: ${cn}.pem and ${cn}.key ..." + + openssl req -newkey rsa:2048 -nodes -out "${cn}.csr" -keyout "${cn}.key" -subj "/CN=${cn}/" + openssl ca -batch -config ca.conf -notext -in "${cn}.csr" -out "${cn}.pem" -extfile "${cn}.conf" + else + echo >&2 "certificates for ${cn} are already available." + fi + + chown systemd-journal-remote:systemd-journal "${cn}.pem" "${cn}.key" + chmod 0640 "${cn}.pem" "${cn}.key" +} + + +# ----------------------------------------------------------------------------- +# Create a script to install the certificate on each server + +generate_install_script() { + local cn="${1}" + local dst="/etc/ssl/systemd-journal" + + cat >"runme-on-${cn}.sh" <<EOFC1 +#!/usr/bin/env bash + +# stop on all errors +set -e + +if [ \$UID -ne 0 ]; then + echo >&2 "Hey! sudo me: sudo \${0}" + exit 1 +fi + +# make sure the systemd-journal group exists +# all certificates will be owned by this group +if ! getent group systemd-journal >/dev/null 2>&1; then + echo >&2 "Missing system group: systemd-journal. Did you install systemd-journald?" + exit 1 +fi + +if ! getent passwd systemd-journal-remote >/dev/null 2>&1; then + echo >&2 "Missing system user: systemd-journal-remote. Did you install systemd-journal-remote?" + exit 1 +fi + +if [ ! -d ${dst} ]; then + echo >&2 "creating directory: ${dst}" + mkdir -p "${dst}" +fi +chown systemd-journal-remote:systemd-journal "${dst}" +chmod 750 "${dst}" +cd "${dst}" + +echo >&2 "saving trusted certificate file as: ${dst}/ca.pem" +cat >ca.pem <<EOFCAPEM +$(cat ca.pem) +EOFCAPEM + +chown systemd-journal-remote:systemd-journal ca.pem +chmod 0640 ca.pem + +echo >&2 "saving server ${cn} certificate file as: ${dst}/${cn}.pem" +cat >"${cn}.pem" <<EOFSERPEM +$(cat "${cn}.pem") +EOFSERPEM + +chown systemd-journal-remote:systemd-journal "${cn}.pem" +chmod 0640 "${cn}.pem" + +echo >&2 "saving server ${cn} key file as: ${dst}/${cn}.key" +cat >"${cn}.key" <<EOFSERKEY +$(cat "${cn}.key") +EOFSERKEY + +chown systemd-journal-remote:systemd-journal "${cn}.key" +chmod 0640 "${cn}.key" + +for cfg in /etc/systemd/journal-remote.conf /etc/systemd/journal-upload.conf +do + if [ -f \${cfg} ]; then + # keep a backup of the file + test ! -f \${cfg}.orig && cp \${cfg} \${cfg}.orig + + # fix its contents + echo >&2 "updating the certificates in \${cfg}" + sed -i "s|^#\\?\\s*ServerKeyFile=.*$|ServerKeyFile=${dst}/${cn}.key|" \${cfg} + sed -i "s|^#\\?\\s*ServerCertificateFile=.*$|ServerCertificateFile=${dst}/${cn}.pem|" \${cfg} + sed -i "s|^#\\?\\s*TrustedCertificateFile=.*$|TrustedCertificateFile=${dst}/ca.pem|" \${cfg} + fi +done + +echo >&2 "certificates installed - you may need to restart services to active them" +echo >&2 +echo >&2 "If this is a central server:" +echo >&2 "# systemctl restart systemd-journal-remote.socket" +echo >&2 +echo >&2 "If this is a passive client:" +echo >&2 "# systemctl restart systemd-journal-upload.service" +echo >&2 +echo >&2 "If this is an active client:" +echo >&2 "# systemctl restart systemd-journal-gateway.socket" +EOFC1 + + chmod 0700 "runme-on-${cn}.sh" +} + +# ----------------------------------------------------------------------------- +# Create the client certificates + +generate_server_certificate "${@}" +generate_install_script "${1}" + + +# Set ANSI escape code for colors +yellow_color="\033[1;33m" +green_color="\033[0;32m" +# Reset ANSI color after the message +reset_color="\033[0m" + + +echo >&2 -e "use this script to install it on ${1}: ${yellow_color}$(ls ${dst}/runme-on-${1}.sh)${reset_color}" +echo >&2 "copy it to your server ${1}, like this:" +echo >&2 -e "# ${green_color}scp ${dst}/runme-on-${1}.sh ${1}:/tmp/${reset_color}" +echo >&2 "and then run it on that server to install the certificates" +echo >&2 |