feat(terraform): add CKV NCP rules about Load Balancer Exposed to Internet

checkov/terraform/checks/resource/ncp/LBNetworkPrivate.py

@@ -0,0 +1,24 @@
+from __future__ import annotations
+
+from checkov.common.models.enums import CheckCategories
+from checkov.terraform.checks.resource.base_resource_value_check import BaseResourceValueCheck
+from typing import Any
+
+
+class LBNetworkPrivate(BaseResourceValueCheck):
+
+    def __init__(self):
+        name = "Ensure Load Balancer isn't exposed to the internet"
+        id = "CKV_NCP_16"
+        supported_resources = ("ncloud_lb",)
+        categories = (CheckCategories.NETWORKING,)
+        super().__init__(name=name, id=id, categories=categories, supported_resources=supported_resources)
+
+    def get_inspected_key(self) -> str:
+        return "network_type"
+
+    def get_expected_value(self) -> Any:
+        return "PRIVATE"
+
+
+check = LBNetworkPrivate()

tests/terraform/checks/resource/ncp/example_LBNetworkPrivate/main.tf

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+resource "ncloud_lb" "pass" {
+  name = "tf-lb-test"
+  network_type = "PRIVATE"
+  type = "APPLICATION"
+  subnet_no_list = [ ncloud_subnet.test.subnet_no ]
+}
+
+resource "ncloud_lb" "fail" {
+  name = "tf-lb-test"
+  network_type = "PUBLIC"
+  type = "APPLICATION"
+  subnet_no_list = [ ncloud_subnet.test.subnet_no ]
+}
+resource "ncloud_lb" "fail2" {
+  name = "tf-lb-test"
+  type = "APPLICATION"
+  subnet_no_list = [ ncloud_subnet.test.subnet_no ]
+}

tests/terraform/checks/resource/ncp/test_LBNetworkPrivate.py

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+import unittest
+from pathlib import Path
+
+from checkov.runner_filter import RunnerFilter
+from checkov.terraform.checks.resource.ncp.LBNetworkPrivate import check
+from checkov.terraform.runner import Runner
+
+
+class TestLBNetworkPrivate(unittest.TestCase):
+    def test(self):
+        # given
+        test_files_dir = Path(__file__).parent / "example_LBNetworkPrivate"
+
+        # when
+        report = Runner().run(root_folder=str(test_files_dir), runner_filter=RunnerFilter(checks=[check.id]))
+
+        # then
+        summary = report.get_summary()
+
+        passing_resources = {
+            "ncloud_lb.pass",
+        }
+        failing_resources = {
+            "ncloud_lb.fail",
+            "ncloud_lb.fail2"
+        }
+
+        passed_check_resources = {c.resource for c in report.passed_checks}
+        failed_check_resources = {c.resource for c in report.failed_checks}
+
+        self.assertEqual(summary["passed"], 1)
+        self.assertEqual(summary["failed"], 2)
+        self.assertEqual(summary["skipped"], 0)
+        self.assertEqual(summary["parsing_errors"], 0)
+
+        self.assertEqual(passing_resources, passed_check_resources)
+        self.assertEqual(failing_resources, failed_check_resources)
+
+
+if __name__ == "__main__":
+    unittest.main()