fix(LengthValidator): don't validate maximum if no maximum is given

This commit allows the maximum constraint to be entirely bypassed by setting the maximum property to 0 as some cases will not have a static maximum value.

Author: jaredhendrickson13

pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Validators/LengthValidator.inc

@@ -44,7 +44,7 @@ class LengthValidator extends RESTAPI\Core\Validator {
                 );
             }
             # Throw an error if the string contains more characters than the specified maximum
-            if (strlen($value) > $this->maximum) {
+            if ($this->maximum and strlen($value) > $this->maximum) {
                 throw new ValidationError(
                     message: "Field '$field_name' exceeds the maximum character length of $this->maximum.",
                     response_id: 'LENGTH_VALIDATOR_MAXIMUM_CONSTRAINT',
@@ -61,7 +61,7 @@ class LengthValidator extends RESTAPI\Core\Validator {
                 );
             }
             # Throw an error if the array contains more array entries than the specified maximum
-            if (count($value) > $this->maximum) {
+            if ($this->maximum and count($value) > $this->maximum) {
                 throw new ValidationError(
                     message: "Field '$field_name' exceeds the maximum array length of $this->maximum.",
                     response_id: 'LENGTH_VALIDATOR_MAXIMUM_CONSTRAINT',