Create the memory map with the security attributes for the current user (rather than the default) to avoid permissions failures when the client and the agent run in different UAC contexts. Fixes #98.

paramiko/win_pageant.py

@@ -27,6 +27,7 @@ import array
 import platform
 import ctypes.wintypes
 
+import jaraco.windows.security as security
 import jaraco.windows.mmap as mmap
 
 _AGENT_COPYDATA_ID = 0x804e50ba
@@ -74,7 +75,9 @@ def _query_pageant(msg):
     # create a name for the mmap
     map_name = 'PageantRequest%08x' % threading.current_thread().ident
 
-    pymap = mmap.MemoryMap(map_name, _AGENT_MAX_MSGLEN)
+    pymap = mmap.MemoryMap(map_name, _AGENT_MAX_MSGLEN,
+        security.get_security_attributes_for_user(),
+        )
     with pymap:
         pymap.write(msg)
         # Create an array buffer containing the mapped filename