Bash snippets

TLS certificate expiration

#
# Get TLS certificates expiration
# Useful to verify when TLS certificates will expire
readonly BLUE='\033[0;34m'
readonly RED='\033[0;31m'
readonly NC='\033[0m' # No Color

validate(){
    if [[ -z "$1" || -z "$2" ]]; then
        echo "Validate needs 2 arguments: validate [host] [port]"
        return
    fi
    HOST=$1
    PORT=$2
    VAL=$(echo | openssl s_client -connect ${HOST}:${PORT} 2>/dev/null | openssl x509 -noout -dates | grep notAfter) 
    AFTER=$(echo -e "${VAL} ${HOST}" | awk '{split($0,a,"="); split(a[2],b,"GMT"); print b[1]}')
    URL=$(echo -e "${VAL} ${HOST}" | awk '{split($0,a,"="); split(a[2],b,"GMT"); print b[2]}')
    echo -e "${RED} ${AFTER} ${BLUE} ${URL} ${NC}"
}