chore: update charm libraries (#289)

lib/charms/tls_certificates_interface/v3/tls_certificates.py

@@ -305,6 +305,7 @@ def _on_all_certificates_invalidated(self, event: AllCertificatesInvalidatedEven
  ModelError,
  Relation,
  RelationDataContent,
+ Secret,
  SecretNotFoundError,
  Unit,
 )
@@ -317,7 +318,7 @@ def _on_all_certificates_invalidated(self, event: AllCertificatesInvalidatedEven
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 17
+LIBPATCH = 18
 
 PYDEPS = ["cryptography", "jsonschema"]
 
@@ -1966,9 +1967,10 @@ def _on_secret_expired(self, event: SecretExpiredEvent) -> None:
  Args:
  event (SecretExpiredEvent): Juju event
  """
- if not event.secret.label or not event.secret.label.startswith(f"{LIBID}-"):
+ csr = self._get_csr_from_secret(event.secret)
+ if not csr:
+ logger.error("Failed to get CSR from secret %s", event.secret.label)
  return
- csr = event.secret.get_content()["csr"]
  provider_certificate = self._find_certificate_in_relation_data(csr)
  if not provider_certificate:
  # A secret expired but we did not find matching certificate. Cleaning up
@@ -2008,3 +2010,18 @@ def _find_certificate_in_relation_data(self, csr: str) -> Optional[ProviderCerti
  continue
  return provider_certificate
  return None
+
+ def _get_csr_from_secret(self, secret: Secret) -> str:
+ """Extract the CSR from the secret label or content.
+
+ This function is a workaround to maintain backwards compatiblity
+ and fix the issue reported in
+ https://github.com/canonical/tls-certificates-interface/issues/228
+ """
+ if not (csr := secret.get_content().get("csr", "")):
+ # In versions <14 of the Lib we were storing the CSR in the label of the secret
+ # The CSR now is stored int the content of the secret, which was a breaking change
+ # Here we get the CSR if the secret was created by an app using libpatch 14 or lower
+ if secret.label and secret.label.startswith(f"{LIBID}-"):
+ csr = secret.label[len(f"{LIBID}-") :]
+ return csr