Check the certificate expiration date

Author: MatteoPologruto

certificates/certificates.go

@@ -30,6 +30,7 @@ import (
 	"math/big"
 	"net"
 	"os"
+	"strings"
 	"time"
 
 	"github.com/arduino/go-paths-helper"
@@ -267,3 +268,12 @@ func DeleteCertificates(certDir *paths.Path) {
 	certDir.Join("cert.pem").Remove()
 	certDir.Join("cert.cer").Remove()
 }
+
+// IsExpired checks if a certificate is expired
+func IsExpired() bool {
+	bound := time.Now().AddDate(0, 1, 0)
+	// TODO: manage errors
+	dateS, _ := GetExpirationDate()
+	date, _ := time.Parse(time.DateTime, strings.ReplaceAll(dateS, "+0000", ""))
+	return date.Before(bound)
+}