fix(sast): fetch sast custom policieis (#6040)

* fetch sast custom policieis

* open with

checkov/common/bridgecrew/integration_features/features/custom_policies_integration.py

@@ -4,6 +4,7 @@
 import logging
 import re
 from collections import defaultdict
+import tempfile
 from typing import TYPE_CHECKING, Any, List
 
 from checkov.common.bridgecrew.integration_features.base_integration_feature import BaseIntegrationFeature
@@ -21,6 +22,7 @@
 
 # service-provider::service-name::data-type-name
 CFN_RESOURCE_TYPE_IDENTIFIER = re.compile(r"^[a-zA-Z0-9]+::[a-zA-Z0-9]+::[a-zA-Z0-9]+$")
+SAST_CATEGORY = 'Sast'
 
 
 class CustomPoliciesIntegration(BaseIntegrationFeature):
@@ -49,9 +51,16 @@ def pre_scan(self) -> None:
                 return
 
             policies = self.bc_integration.customer_run_config_response.get('customPolicies')
+            sast_policies_dir = tempfile.mkdtemp()
+            self.bc_integration.sast_custom_policies = sast_policies_dir
             for policy in policies:
                 try:
                     logging.debug(f"Loading policy id: {policy.get('id')}")
+                    if policy.get('category') == SAST_CATEGORY:
+                        with open(f"{sast_policies_dir}/{policy.get('id')}.yaml", 'a') as f:
+                            f.write(policy.get('code'))
+                        continue
+
                     converted_check = self._convert_raw_check(policy)
                     source_incident_id = policy.get('sourceIncidentId')
                     if source_incident_id:

checkov/common/bridgecrew/platform_integration.py

@@ -147,6 +147,7 @@ def clean(self) -> None:
         self.daemon_process = False  # set to 'True' when running in multiprocessing 'spawn' mode
         self.scan_dir: List[str] = []
         self.scan_file: List[str] = []
+        self.sast_custom_policies: str = ''
 
     def init_instance(self, platform_integration_data: dict[str, Any]) -> None:
         """This is mainly used for recreating the instance without interacting with the platform again"""

checkov/main.py

@@ -737,6 +737,10 @@ def get_external_checks_dir(self) -> list[str]:
             git_getter = GitGetter(url=self.config.external_checks_git[0])
             external_checks_dir = [git_getter.get()]
             atexit.register(shutil.rmtree, str(Path(external_checks_dir[0]).parent))
+        if bc_integration.sast_custom_policies:
+            if not external_checks_dir:
+                external_checks_dir = []
+            external_checks_dir.append(bc_integration.sast_custom_policies)
         return external_checks_dir
 
     def upload_results(