smtp-check

2024-04-23 22:33:13 +04:00
parent d25d8ab992
commit 72ed035132
3 changed files with 95 additions and 40 deletions
@@ -0,0 +1,83 @@
+#!/bin/bash
+readonly DOMAIN=$1
+readonly PROTOCOL=${2:-https}
+readonly TIMEOUT=10 # max seconds to wait
+
+result=0
+
+function usage {
+	echo 'usage: <DOMAIN> [ https | 443 | smtps | 587 | pop3 | 993 | imap | 995 | ALL ]'
+	exit 1
+}
+
+function check_ssl {
+	local protocol=$1
+	case $protocol in
+	SMTPS)
+		local extra="-starttls smtp -showcerts"
+		;;
+	esac
+
+	echo -n "$protocol "
+
+	certificate_info=$(echo | timeout $TIMEOUT openssl s_client $extra -connect $DOMAIN:$2 2>/dev/null)
+
+	issuer=$(echo "$certificate_info" | openssl x509 -noout -text 2>/dev/null | grep Issuer: | cut -d: -f2)
+	date=$(echo "$certificate_info" | openssl x509 -noout -enddate 2>/dev/null | cut -d'=' -f2)
+	date_s=$(date -d "${date}" +%s)
+	now_s=$(date -d now +%s)
+	date_diff=$(((date_s - now_s) / 86400))
+
+	if [[ -z $date ]]; then
+		echo -n "does not respond "
+		echo -ne "\033[31;1m"
+		echo FAILURE
+		((result += 1))
+	elif [[ $date_diff -gt 20 ]]; then
+		echo -n "issuer:$issuer "
+		echo -n "will expire in $date_diff days "
+		echo -ne "\033[32;1m"
+		echo ok
+	elif [[ $date_diff -gt 0 ]]; then
+		echo -n "issuer:$issuer "
+		echo -n "will expire in $date_diff days "
+		echo -ne "\033[31;1m"
+		echo WARNING
+		((result += 1))
+	else
+		echo -n "issuer:$issuer "
+		echo -n "has already expired $date_diff ago "
+		echo -ne "\033[31;1m"
+		echo FAILURE
+		((result += 1))
+	fi
+	echo -ne "\033[0m"
+}
+
+#MAIN
+[[ -z "$DOMAIN" ]] && usage
+case $PROTOCOL in
+https | 443)
+	check_ssl HTTPS 443
+	;;
+smtps | 587)
+	check_ssl SMTPS 587
+	;;
+pop3 | 995)
+	check_ssl POP3 995
+	;;
+imap | 993)
+	check_ssl IMAP 993
+	;;
+all | ALL)
+	check_ssl HTTPS 443
+	check_ssl SMTPS 587
+	check_ssl POP3 995
+	check_ssl IMAP 993
+	;;
+*)
+	usage
+	;;
+esac
+
+exit "$result"