gpg-agent: use correct GNUPGHOME when getting public keys

libagent/gpg/__init__.py

@@ -208,8 +208,10 @@ def run_agent(device_type):
     log.debug('sys.argv: %s', sys.argv)
     log.debug('os.environ: %s', os.environ)
     try:
-        sock_path = keyring.get_agent_sock_path(env={'GNUPGHOME': args.homedir})
-        handler = agent.Handler(device=device_type())
+        env = {'GNUPGHOME': args.homedir}
+        sock_path = keyring.get_agent_sock_path(env=env)
+        pubkey_bytes = keyring.export_public_keys(env=env)
+        handler = agent.Handler(device=device_type(), pubkey_bytes=pubkey_bytes)
         with server.unix_domain_socket_server(sock_path) as sock:
             for conn in agent.yield_connections(sock):
                 with contextlib.closing(conn):

libagent/gpg/agent.py

@@ -68,7 +68,7 @@ class AgentStop(Exception):
 class Handler(object):
     """GPG agent requests' handler."""
 
-    def __init__(self, device):
+    def __init__(self, device, pubkey_bytes):
         """C-tor."""
         self.client = client.Client(device=device)
         # Cache ASSUAN commands' arguments between commands
@@ -76,7 +76,7 @@ class Handler(object):
         self.digest = None
         self.algo = None
         # Cache public keys from GnuPG
-        self.pubkey_bytes = keyring.export_public_keys()
+        self.pubkey_bytes = pubkey_bytes
         # "Clone" existing GPG version
         self.version = keyring.gpg_version()