add get_ca action (#19)

Signed-off-by: Patricia Reinoso <patricia.reinoso@canonical.com>
Co-authored-by: Patricia Reinoso <patricia.reinoso@canonical.com>
Co-authored-by: saltiyazan <yazan.salti.19@gmail.com>

README.md

@@ -30,6 +30,11 @@ To obtain the CA certificate from this charm, your charm needs to support the
 ```console
 juju relate self-signed-certificates:send-ca-cert <your charm>
 ```
+To get the CA certificate run:
+
+```console
+juju run self-signed-certificates/0 get-ca-certificate
+```
 
 ## Get the certificates issued by the charm
 

actions.yaml

@@ -1,2 +1,6 @@
+get-ca-certificate:
+  description: Outputs the CA cert.
+
 get-issued-certificates:
   description: Outputs the certificates issued by the charm.
+

src/charm.py

@@ -44,6 +44,7 @@ def __init__(self, *args):
             self._on_certificate_creation_request,
         )
         self.framework.observe(self.on.secret_expired, self._configure_ca)
+        self.framework.observe(self.on.get_ca_certificate_action, self._on_get_ca_certificate)
         self.framework.observe(
             self.on.get_issued_certificates_action, self._on_get_issued_certificates
         )
@@ -184,7 +185,7 @@ def _on_certificate_creation_request(self, event: CertificateCreationRequestEven
         """Handler for certificate requests.
 
         Args:
-            event (CertificateCreationRequestEvent): Jujue event
+            event (CertificateCreationRequestEvent): Juju event
         """
         if not self.unit.is_leader():
             return
@@ -195,7 +196,7 @@ def _on_certificate_creation_request(self, event: CertificateCreationRequestEven
             event.defer()
             return
         if not self._root_certificate_is_stored:
-            self.unit.status = WaitingStatus("Root Certificates is not yet generated")
+            self.unit.status = WaitingStatus("Root Certificate is not yet generated")
             event.defer()
             return
         ca_certificate_secret = self.model.get_secret(label=CA_CERTIFICATES_SECRET_LABEL)
@@ -216,6 +217,19 @@ def _on_certificate_creation_request(self, event: CertificateCreationRequestEven
         )
         logger.info(f"Generated certificate for relation {event.relation_id}")
 
+    def _on_get_ca_certificate(self, event: ActionEvent):
+        """Handler for the get-ca-certificate action.
+
+        Args:
+            event (ActionEvent): Juju event
+        """
+        if not self._root_certificate_is_stored:
+            event.fail("Root Certificate is not yet generated")
+            return
+        ca_certificate_secret = self.model.get_secret(label=CA_CERTIFICATES_SECRET_LABEL)
+        ca_certificate_secret_content = ca_certificate_secret.get_content()
+        event.set_results({"ca-certificate": ca_certificate_secret_content["ca-certificate"]})
+
     def _on_send_ca_cert_relation_joined(self, event: RelationJoinedEvent):
         self._send_ca_cert(rel_id=event.relation.id)
 

tests/unit/test_charm.py

@@ -172,7 +172,7 @@ def test_given_root_certificate_not_yet_generated_when_certificate_request_then_
 
         self.assertEqual(
             self.harness.model.unit.status,
-            WaitingStatus("Root Certificates is not yet generated"),
+            WaitingStatus("Root Certificate is not yet generated"),
         )
 
     @patch(f"{TLS_LIB_PATH}.TLSCertificatesProvidesV2.set_relation_certificate")
@@ -290,3 +290,32 @@ def test_given_certificates_issued_when_get_issued_certificates_action_then_acti
         }
 
         action_event.set_results.assert_called_with(expected_certificates)
+
+    def test_given_ca_cert_generated_when_get_ca_certificate_action_then_returns_ca_certificate(
+        self,
+    ):
+        self.harness.set_leader(is_leader=True)
+        ca_certificate = "whatever CA certificate"
+
+        self.harness._backend.secret_add(
+            label="ca-certificates",
+            content={
+                "ca-certificate": ca_certificate,
+                "private-key": "whatever private key",
+                "private-key-password": "whatever private_key_password",
+            },
+        )
+
+        action_event = Mock()
+        self.harness.charm._on_get_ca_certificate(action_event)
+        expected_certificate = {
+            "ca-certificate": ca_certificate,
+        }
+
+        action_event.set_results.assert_called_with(expected_certificate)
+
+    def test_given_ca_cert_not_generated_when_get_ca_certificate_action_then_action_fails(self):
+        self.harness.set_leader(is_leader=True)
+        action_event = Mock()
+        self.harness.charm._on_get_ca_certificate(action_event)
+        action_event.fail.assert_called_with("Root Certificate is not yet generated")