Initial cloud-services repo - gateway service + pkg modules

pkg/validator/certificate_serial.go

@@ -0,0 +1,26 @@
+package validator
+
+import (
+	"regexp"
+
+	"fiskerinc.com/modules/logger"
+	"github.com/go-playground/validator/v10"
+	"github.com/pkg/errors"
+)
+
+func validateCertSerial(fl validator.FieldLevel) bool {
+	ok, err := ValidateCertSerialSimple(fl.Field().String())
+	if err != nil {
+		logger.Err(err).Msg("Unable to validate certificate serial number")
+
+	}
+	return ok
+}
+
+func ValidateCertSerialSimple(serial string) (bool, error) {
+	matched, err := regexp.Match(`^([a-zA-Z0-9]{2}[:-]{1}){18,19}[a-zA-Z0-9]{2}$`, []byte(serial))
+	if err != nil {
+		return matched, errors.WithStack(err)
+	}
+	return matched, nil
+}