[core] The generation of RSA keys should be behind shared process locks.

platypush/utils/__init__.py

@@ -14,6 +14,7 @@ import socket
 import ssl
 import time
 import urllib.request
+from collections import defaultdict
 from importlib.machinery import SourceFileLoader
 from importlib.util import spec_from_loader, module_from_spec
 from multiprocessing import Lock as PLock
@@ -29,6 +30,7 @@ logger = logging.getLogger('utils')
 Lock = Union[PLock, TLock]  # type: ignore
 
 redis_pools: dict[Tuple[str, int], ConnectionPool] = {}
+key_locks: dict[str, Lock] = defaultdict(PLock)
 
 
 def get_module_and_method_from_action(action):
@@ -564,6 +566,7 @@ def get_or_generate_stored_rsa_key_pair(
     priv_key_file = os.path.join(keydir, os.path.basename(keyfile))
     pub_key_file = priv_key_file + '.pub'
 
+    with key_locks[keyfile]:
         if os.path.isfile(priv_key_file) and os.path.isfile(pub_key_file):
             with open(pub_key_file, 'r') as f1, open(priv_key_file, 'r') as f2:
                 return (