add a new app for ldap3-authentication (currently, it uses a testserver), login/logout from django, my own decorator

fet2020/authentications/authentications.py

@@ -0,0 +1,27 @@
+import ldap3
+
+
+def authentication(username, password):
+    # no empty passwords
+    if password is None or password.strip() == "":
+        # messages.info("username:%s Login denied for blank password", username)
+        return None
+
+    # username format
+    new_username = 'uid={username}, cn=users, cn=accounts, dc=demo1, dc=freeipa, dc=org'
+    userdn = new_username.format(username=username)
+
+    server_uri = 'ipa.demo1.freeipa.org'
+    server = ldap3.Server(server_uri, get_info=ldap3.ALL)
+
+    try:
+        ldap3.Connection(
+            server,
+            userdn,
+            password,
+            auto_bind=True,
+        )
+    except ldap3.core.exceptions.LDAPBindError:
+        username = None
+
+    return username