recert, fconv

1 files changed, 132 insertions, 0 deletions

diff --git a/recert b/recert
new file mode 100755
index 0000000..8a15054
--- /dev/null
+++ b/recert
@@ -0,0 +1,132 @@
+#!/usr/bin/env bash
+
+single=0 # merge the certs into a single cert
+force=0 # if to skip similariaty checks or not
+quiet=0 # should i shut up?!?!? :<
+cert='cert.pem' # where the public cert should go
+key='cert.key' # where the private cert should go
+domain='localhost' # the domain to copy certs from
+
+usage() {
+	printf "usage: recert [-hsfq] [-d DOMAIN] [-c CERT] [-k KEY]\n\n"
+	printf "\t-h\t\tshow the help message\n"
+	printf "\t-s\t\tcombine the certs into a single cert\n"
+	printf "\t-f\t\tskip cert equal checks (force)\n"
+	printf "\t-q\t\tquiet output\n"
+	printf "\t-d DOMAIN\tthe domain name to recert\n"
+	printf "\t-c CERT\t\tthe destination path for the cert\n"
+	printf "\t-k KEY\t\tthe destination path for the key (no -s)\n"
+}
+
+hash() {
+	if [ -f "$1" ]; then
+		sha3sum "$1" | awk '{ print $1 }';
+	fi
+}
+
+letscert() {
+	certbot certonly \
+		--preferred-chain "ISRG Root X1" \
+		--key-type rsa \
+		--webroot --webroot-path "/var/www/html" \
+		-d "$1"
+}
+
+recert_log() {
+	if [ $quiet = 0 ]; then
+		printf "$*" 1>&2
+	fi
+}
+
+chk_command() {
+	if ! command -v "$1" > /dev/null; then
+		>&2 echo "error: command '$1' could not be found"
+		exit 1
+	fi
+}
+
+while getopts ":hsfqd:c:k:" arg > /dev/null; do
+	case $arg in
+		h)
+			usage
+			exit 0
+			;;
+		s)
+			single=1
+			;;
+		f)
+			force=1
+			;;
+		q)
+			quiet=1
+			;;
+		d)
+			domain=${OPTARG}
+			;;
+		c)
+			cert=${OPTARG}
+			;;
+		k)
+			key=${OPTARG}
+			;;
+		?)
+			echo "unknown option"
+			exit 1
+			;;
+	esac
+done
+
+chk_command "getopts"
+chk_command "certbot"
+chk_command "openssl"
+
+if [ ! "$cert" = "cert.pem" ] && [ "$key" = "cert.key" ]; then
+	name=${cert%.*}
+	key="$name.key"
+fi
+
+# Step 1: make sure letsencrypt certs exist (create if not)
+lets_root="/etc/letsencrypt/live"
+lets_cert="$lets_root/$domain/fullchain.pem"
+lets_key="$lets_root/$domain/privkey.pem"
+if [ ! -f "$lets_cert" ] && [ ! -f "$lets_key" ]; then
+	letscert "$domain"
+fi
+
+# Step 2: make sure certs wont expire soon (create if will)
+if openssl x509 -checkend 604800 -noout -in "$lets_cert" > /dev/null; then
+	# certificate is good, only update if forced
+	if [ $force = 1 ]; then
+		rm "$lets_root"/*
+		rmdir "$lets_root"
+		recert_log "renewing... "
+		letscert "$domain"
+	else
+		recert_log "up to date... "
+	fi
+else
+	recert_log "renewing... "
+	letscert "$domain"
+fi
+
+# Step 3: store lets encrypt cert into tmp file
+tmp=$(mktemp)
+if [ $single = 1 ]; then
+	{
+		cat "$lets_cert";
+		echo;
+		cat "$lets_key";
+	} >> "$tmp"
+fi
+
+# Step 4: copy certs
+recert_log "copied certs\n"
+if [ $single = 1 ]; then
+	cp "$tmp" "$cert"
+else
+	cp "$lets_cert" "$cert"
+	cp "$lets_key" "$key"
+fi
+
+# Cleanup
+rm "$tmp"