#!/bin/bash
# Zabbix External Script: Advanced SSL Check
# Usage: check_ssl_advanced.sh <hostname> <port>

SERVER=$1
PORT=${2:-443}

if [ -z "$SERVER" ]; then
    echo "Usage: $0 <hostname> [port]"
    exit 1
fi

# Calcular dias para expirar
END_DATE=$(echo | openssl s_client -servername "$SERVER" -connect "$SERVER:$PORT" 2>/dev/null | openssl x509 -noout -enddate)

if [ -z "$END_DATE" ]; then
    echo "-1" # Error connecting
    exit
fi

END_DATE_STR=${END_DATE#*=}
END_EPOCH=$(date +%s -d "$END_DATE_STR")
NOW_EPOCH=$(date +%s)
SECONDS_LEFT=$((END_EPOCH - NOW_EPOCH))
DAYS_LEFT=$((SECONDS_LEFT / 86400))

# Retorna número de dias
echo "$DAYS_LEFT"