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Use functions in cert-expirations.sh

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Jérémy Dubois 2022-12-01 16:42:35 +01:00
parent e33722d440
commit bd5e02bb87
1 changed files with 118 additions and 66 deletions
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184
cert-expirations.sh
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@ -1,72 +1,124 @@
#!/bin/sh
SYSTEM=$(uname | tr '[:upper:]' '[:lower:]')
VERSION="22.04"
if [ "${SYSTEM}" = "openbsd" ]; then
carp=$(/sbin/ifconfig carp0 2>/dev/null | grep 'status' | cut -d' ' -f2)
if [ "$carp" = "backup" ]; then
exit 0
fi
fi
show_version() {
cat <<END
cert-expirations.sh version ${VERSION}
cacert_path="/etc/openvpn/ssl/ca/cacert.pem"
index_path="/etc/openvpn/ssl/ca/index.txt"
somedays="3456000" # 40 days currently
expired_certs=""
expiring_soon_certs=""
still_valid_certs=""
Copyright 2020-2022 Evolix <info@evolix.fr>,
Jérémy Lecour <jlecour@evolix.fr>,
Jérémy Dubois <jdubois@evolix.fr>
and others.
echo "Warning : all times are in UTC !"
echo ""
echo "CA certificate:"
openssl x509 -enddate -noout -in ${cacert_path} \
| cut -d '=' -f 2 \
| sed -e "s/^\(.*\)\ \(20..\).*/- \2 \1/"
echo ""
# Syntax "cmd | { while read line; do var="foo"; done echo $var }" needed, otherwise $var is empty at the end of while loop
grep ^V ${index_path} \
| awk -F "/" '{print $1,$5}' \
| awk '{print $2,$5}' \
| sed 's/CN=//' \
| sed -E 's/([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})Z (.*)/- 20\1 \2 \3 \4:\5:\6 \7/' \
| awk '{if ($3 == "01") $3="Jan"; else if ($3 == "02") $3="Feb"; else if ($3 == "03") $3="Mar"; else if ($3 == "04") $3="Apr"; else if ($3 == "05") $3="May"; else if ($3 == "06") $3="Jun"; else if ($3 == "07") $3="Jul"; else if ($3 == "08") $3="Aug"; else if ($3 == "09") $3="Sep"; else if ($3 == "10") $3="Oct"; else if ($3 == "11") $3="Nov"; else if ($3 == "12") $3="Dec"; print $0;}' \
| sort -n -k 2 -k 3M -k 4 | {
while read -r line; do
# Predicting expirations - OpenBSD case (date is not the same than in Linux)
if [ "${SYSTEM}" = "openbsd" ]; then
# Already expired if expiration date is before now
if [ "$(TZ=:Zulu date -jf "%Y %b %d %H:%M:%S" "$(echo "$line" | awk '{print $2,$3,$4,$5}')" +%s)" -le "$(date +%s)" ]; then
expired_certs="${expired_certs}$line\n"
# Expiring soon if expiration date is after now and before now + $somedays days
elif [ "$(TZ=:Zulu date -jf "%Y %b %d %H:%M:%S" "$(echo "$line" | awk '{print $2,$3,$4,$5}')" +%s)" -gt "$(date +%s)" ] && [ "$(TZ=:Zulu date -jf "%Y %b %d %H:%M:%S" "$(echo "$line" | awk '{print $2,$3,$4,$5}')" +%s)" -lt "$(($(date +%s) + somedays))" ]; then
expiring_soon_certs="${expiring_soon_certs}$line\n"
# Still valid for a time if expiration date is after now + $somedays days
elif [ "$(TZ=:Zulu date -jf "%Y %b %d %H:%M:%S" "$(echo "$line" | awk '{print $2,$3,$4,$5}')" +%s)" -ge "$(($(date +%s) + somedays))" ]; then
still_valid_certs="${still_valid_certs}$line\n"
fi
# Non OpenBSD cases
else
# Already expired if expiration date is before now
if [ "$(TZ=:Zulu date -d "$(echo "$line" | awk '{print $3,$4,$2,$5}')" +%s)" -le "$(date +%s)" ]; then
expired_certs="${expired_certs}$line\n"
# Expiring soon if expiration date is after now and before now + $somedays days
elif [ "$(TZ=:Zulu date -d "$(echo "$line" | awk '{print $3,$4,$2,$5}')" +%s)" -gt "$(date +%s)" ] && [ "$(TZ=:Zulu date -d "$(echo "$line" | awk '{print $3,$4,$2,$5}')" +%s)" -lt "$(($(date +%s) + somedays))" ]; then
expiring_soon_certs="${expiring_soon_certs}$line\n"
# Still valid for a time if expiration date is after now + $somedays days
elif [ "$(TZ=:Zulu date -d "$(echo "$line" | awk '{print $3,$4,$2,$5}')" +%s)" -ge "$(($(date +%s) + somedays))" ]; then
still_valid_certs="${still_valid_certs}$line\n"
fi
fi
done
echo "Expired client certificates:"
echo "${expired_certs}"
echo "Valid client certificates expiring soon (in less than $((somedays / 60 / 60 / 24)) days):"
echo "${expiring_soon_certs}"
echo "Valid client certificates expiring later (in more than $((somedays / 60 / 60 / 24)) days):"
echo "${still_valid_certs}"
cert-expirations.sh comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to redistribute it under certain conditions.
See the MIT Licence for details.
END
}
show_usage() {
cat <<END
Usage: ${0} [--version]
END
}
check_ca_expiration() {
echo "CA certificate:"
openssl x509 -enddate -noout -in ${cacert_path} \
| cut -d '=' -f 2 \
| sed -e "s/^\(.*\)\ \(20..\).*/- \2 \1/"
}
check_certs_expiration() {
# Syntax "cmd | { while read line; do var="foo"; done echo $var }" needed, otherwise $var is empty at the end of while loop
grep ^V ${index_path} \
| awk -F "/" '{print $1,$5}' \
| awk '{print $2,$5}' \
| sed 's/CN=//' \
| sed -E 's/([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})([[:digit:]]{2})Z (.*)/- 20\1 \2 \3 \4:\5:\6 \7/' \
| awk '{if ($3 == "01") $3="Jan"; else if ($3 == "02") $3="Feb"; else if ($3 == "03") $3="Mar"; else if ($3 == "04") $3="Apr"; else if ($3 == "05") $3="May"; else if ($3 == "06") $3="Jun"; else if ($3 == "07") $3="Jul"; else if ($3 == "08") $3="Aug"; else if ($3 == "09") $3="Sep"; else if ($3 == "10") $3="Oct"; else if ($3 == "11") $3="Nov"; else if ($3 == "12") $3="Dec"; print $0;}' \
| sort -n -k 2 -k 3M -k 4 | {
while read -r line; do
# Predicting expirations - OpenBSD case (date is not the same than in Linux)
if [ "${SYSTEM}" = "openbsd" ]; then
# Already expired if expiration date is before now
if [ "$(TZ=:Zulu date -jf "%Y %b %d %H:%M:%S" "$(echo "$line" | awk '{print $2,$3,$4,$5}')" +%s)" -le "$(date +%s)" ]; then
expired_certs="${expired_certs}$line\n"
# Expiring soon if expiration date is after now and before now + $somedays days
elif [ "$(TZ=:Zulu date -jf "%Y %b %d %H:%M:%S" "$(echo "$line" | awk '{print $2,$3,$4,$5}')" +%s)" -gt "$(date +%s)" ] && [ "$(TZ=:Zulu date -jf "%Y %b %d %H:%M:%S" "$(echo "$line" | awk '{print $2,$3,$4,$5}')" +%s)" -lt "$(($(date +%s) + somedays))" ]; then
expiring_soon_certs="${expiring_soon_certs}$line\n"
# Still valid for a time if expiration date is after now + $somedays days
elif [ "$(TZ=:Zulu date -jf "%Y %b %d %H:%M:%S" "$(echo "$line" | awk '{print $2,$3,$4,$5}')" +%s)" -ge "$(($(date +%s) + somedays))" ]; then
still_valid_certs="${still_valid_certs}$line\n"
fi
# Non OpenBSD cases
else
# Already expired if expiration date is before now
if [ "$(TZ=:Zulu date -d "$(echo "$line" | awk '{print $3,$4,$2,$5}')" +%s)" -le "$(date +%s)" ]; then
expired_certs="${expired_certs}$line\n"
# Expiring soon if expiration date is after now and before now + $somedays days
elif [ "$(TZ=:Zulu date -d "$(echo "$line" | awk '{print $3,$4,$2,$5}')" +%s)" -gt "$(date +%s)" ] && [ "$(TZ=:Zulu date -d "$(echo "$line" | awk '{print $3,$4,$2,$5}')" +%s)" -lt "$(($(date +%s) + somedays))" ]; then
expiring_soon_certs="${expiring_soon_certs}$line\n"
# Still valid for a time if expiration date is after now + $somedays days
elif [ "$(TZ=:Zulu date -d "$(echo "$line" | awk '{print $3,$4,$2,$5}')" +%s)" -ge "$(($(date +%s) + somedays))" ]; then
still_valid_certs="${still_valid_certs}$line\n"
fi
fi
done
echo "Expired client certificates:"
echo "${expired_certs}"
echo "Valid client certificates expiring soon (in less than $((somedays / 60 / 60 / 24)) days):"
echo "${expiring_soon_certs}"
echo "Valid client certificates expiring later (in more than $((somedays / 60 / 60 / 24)) days):"
echo "${still_valid_certs}"
}
}
main() {
SYSTEM=$(uname | tr '[:upper:]' '[:lower:]')
if [ "${SYSTEM}" = "openbsd" ]; then
carp=$(/sbin/ifconfig carp0 2>/dev/null | grep 'status' | cut -d' ' -f2)
if [ "$carp" = "backup" ]; then
exit 0
fi
fi
cacert_path="/etc/openvpn/ssl/ca/cacert.pem"
index_path="/etc/openvpn/ssl/ca/index.txt"
somedays="3456000" # 40 days currently
expired_certs=""
expiring_soon_certs=""
still_valid_certs=""
case "$1" in
version|--version)
show_version
exit 0
;;
help|--help)
show_usage
exit 0
;;
"")
echo "Warning : all times are in UTC !"
echo ""
check_ca_expiration
echo ""
check_certs_expiration
;;
*)
show_usage >&2
exit 1
;;
esac
}
main "$@"