sne: use Debian version of cryptography (#78475)

passerelle/apps/sne/models.py

@@ -44,8 +44,7 @@ class SNE(BaseResource, HTTPResource):
     @property
     def cert_public_bytes(self):
         with self.client_certificate.open('rb') as f:
-            certs = x509.load_pem_x509_certificates(f.read())
-        cert = certs[0]
+            cert = x509.load_pem_x509_certificate(f.read())
         return cert.public_bytes(encoding=serialization.Encoding.PEM)
 
     def check_status(self):

tox.ini

@@ -47,6 +47,7 @@ deps =
   ldaptools
   Pillow<9.5.0
   python-ldap<=3.2  # align with Debian <= 11 (buster, bullseye)
+  cryptography<39
   git+https://git.entrouvert.org/publik-django-templatetags.git
 commands =
   ./get_wcs.sh