Introduce initial TC-RR-1.1

- TC-RR-1.1 is a critical test to validate multi-fabric
  behavior is stable and actually works. The test, broadly,
  validates most of the minimas of the core elements of the spec,
  including ACL entries, certificate sizes, number of CASE
  sessions and subscriptions, number of paths, etc.

Issue project-chip#21736

- This PR introduces the core test and all associated minor
  changes to infrastructure to make it work.
- Still TODO:
  - More extensive cert size maximization (closer to 400 TLV bytes)
  - Add controller and commissionee CAT tags (test is 95% equivalent
    to test plan, but a couple ACL fields differ because of this, in
    ways that don't detract from proving what needs proving
  - Validation that local/peer session IDs have not changed. This is
    not technically needed with the SDK as-is based on the methodology
    but it would future-proof the test against some future optimizations
    that may change subscription behavior in a way that the test would
    not validate CASE sessions remain.
  - Clean-up more after the test, so that a factory reset before/after
    is not needed.

Testing done:
- Passes on Linux against all-clusters, all-clusters-minimal and
  lighting app, with both minimal mdns and Avahi.
- Passes on some other platforms (not named here)

src/controller/ExampleOperationalCredentialsIssuer.cpp

@@ -146,8 +146,7 @@ CHIP_ERROR IssueX509Cert(uint32_t now, uint32_t validity, ChipDN issuerDn, ChipD
 
             ReturnErrorOnFailure(ConvertX509CertToChipCert(paddedDerSpan, paddedTlvSpan));
 
-            // TODO: REMOVE
-            printf("   TLV: %d DER: %d\n", (int)paddedTlvSpan.size(), (int)paddedDerSpan.size());
+            ChipLogProgress(Controller, "Generated maximized certificate with %u DER bytes, %u TLV bytes", static_cast<unsigned>(paddedDerSpan.size()), static_cast<unsigned>(paddedTlvSpan.size()));
             if (paddedDerSpan.size() <= kMaxDERCertLength && paddedTlvSpan.size() <= kMaxCHIPCertLength)
             {
                 return CopySpanToMutableSpan(paddedDerSpan, outX509Cert);

src/python_testing/TC_RR_1_1.py

@@ -38,7 +38,6 @@
 #       the trigger the subscriptions not re-opening a new CASE session
 #
 
-
 class TC_RR_1_1(MatterBaseTest):
     def setup_class(self):
         self._pseudo_random_generator = random.Random(1234)
@@ -311,10 +310,18 @@ async def test_TC_RR_1_1(self):
         if sub_test_failed:
             asserts.fail("Failed step 7 !")
 
-        # Step 8: TODO: Validate sessions have not changed by doing a read on NodeLabel from all clients
+        # Step 8: Validate sessions have not changed by doing a read on NodeLabel from all clients
+        logging.info("Step 8: Read back NodeLabel directly from all clients")
+        for sub_idx, client in enumerate(client_list):
+            logging.info("Reading NodeLabel (%d/%d) from controller node %s" % (sub_idx + 1, len(client_list), client.name))
 
-        # Step 9: Fill user label list
+            label_readback = await self.read_single_attribute(client, node_id=self.dut_node_id, endpoint=0, attribute=Clusters.Basic.Attributes.NodeLabel)
+            asserts.assert_equal(label_readback, AFTER_LABEL)
 
+            # TODO: Compare before/after session IDs. Requires more native changes, and the
+            #       subcription method above is actually good enough we think.
+
+        # Step 9: Fill user label list
         if has_user_labels and not skip_user_label_cluster_steps:
             await self.fill_user_label_list(dev_ctrl, self.dut_node_id)
         else:
@@ -421,4 +428,4 @@ def build_acl(self, fabric_number, client_by_name, num_controllers_per_fabric):
 
 
 if __name__ == "__main__":
-    default_matter_test_main()
+    default_matter_test_main(maximize_cert_chains=True)

src/python_testing/matter_testing_support.py

@@ -133,6 +133,7 @@ class MatterTestConfig:
     discriminator: int = None
     setup_passcode: int = None
     commissionee_ip_address_just_for_testing: str = None
+    maximize_cert_chains: bool = False
 
     qr_code_content: str = None
     manual_code: str = None
@@ -187,7 +188,7 @@ def _init_stack(self, already_initialized: bool, **kwargs):
             self._logger.warn(
                 "Didn't find any CertificateAuthorities in storage -- creating a new CertificateAuthority + FabricAdmin...")
             ca = self._certificate_authority_manager.NewCertificateAuthority(caIndex = self._config.root_of_trust_index)
-            ca.maximizeCertChains = True
+            ca.maximizeCertChains = self._config.maximize_cert_chains
             ca.NewFabricAdmin(vendorId=0xFFF1, fabricId=self._config.fabric_id)
         elif (len(self._certificate_authority_manager.activeCaList[0].adminList) == 0):
             self._logger.warn("Didn't find any FabricAdmins in storage -- creating a new one...")
@@ -666,7 +667,7 @@ def _commission_device(self) -> bool:
             raise ValueError("Invalid commissioning method %s!" % conf.commissioning_method)
 
 
-def default_matter_test_main(argv=None):
+def default_matter_test_main(argv=None, **kwargs):
     """Execute the test class in a test module.
     This is the default entry point for running a test script file directly.
     In this case, only one test class in a test script is allowed.
@@ -692,6 +693,13 @@ def default_matter_test_main(argv=None):
     if len(matter_test_config.tests) > 0:
         tests = matter_test_config.tests
 
+    # This is required in case we need any testing with maximized certificate chains.
+    # We need *all* issuers from the start, even for default controller, to use
+    # maximized chains, before MatterStackState init, others some stale certs
+    # may not chain properly.
+    if "maximize_cert_chains" in kwargs:
+        matter_test_config.maximize_cert_chains = kwargs["maximize_cert_chains"]
+
     stack = MatterStackState(matter_test_config)
     test_config.user_params["matter_stack"] = stash_globally(stack)