135 lines
7.3 KiB
Python
135 lines
7.3 KiB
Python
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"""
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Implements a permissions editor for services.
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Service can be specified as plain name for local machine,
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or as a remote service of the form \\machinename\service
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"""
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import os
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import win32com.server.policy
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import win32security, ntsecuritycon, win32con
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import pythoncom, win32api, win32service
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from win32com.authorization import authorization
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SERVICE_GENERIC_EXECUTE=win32service.SERVICE_START|win32service.SERVICE_STOP|win32service.SERVICE_PAUSE_CONTINUE|win32service.SERVICE_USER_DEFINED_CONTROL
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SERVICE_GENERIC_READ=win32service.SERVICE_QUERY_CONFIG|win32service.SERVICE_QUERY_STATUS|win32service.SERVICE_INTERROGATE|win32service.SERVICE_ENUMERATE_DEPENDENTS
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SERVICE_GENERIC_WRITE=win32service.SERVICE_CHANGE_CONFIG
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from ntsecuritycon import STANDARD_RIGHTS_READ, STANDARD_RIGHTS_WRITE, STANDARD_RIGHTS_EXECUTE, \
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WRITE_OWNER, WRITE_DAC, READ_CONTROL, \
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SI_ADVANCED, SI_EDIT_AUDITS, SI_EDIT_PROPERTIES, SI_EDIT_ALL, SI_PAGE_TITLE, SI_RESET, \
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SI_ACCESS_SPECIFIC, SI_ACCESS_GENERAL, SI_ACCESS_CONTAINER, SI_ACCESS_PROPERTY, \
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OBJECT_INHERIT_ACE, CONTAINER_INHERIT_ACE, INHERIT_ONLY_ACE, \
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SI_PAGE_PERM, SI_PAGE_ADVPERM, SI_PAGE_AUDIT, SI_PAGE_OWNER, PSPCB_SI_INITDIALOG, \
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SI_CONTAINER
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from win32security import OBJECT_INHERIT_ACE, CONTAINER_INHERIT_ACE, INHERIT_ONLY_ACE
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from win32com.shell.shellcon import PSPCB_RELEASE, PSPCB_CREATE ## Msg parameter to PropertySheetPageCallback
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from pythoncom import IID_NULL
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class ServiceSecurity(win32com.server.policy.DesignatedWrapPolicy):
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_com_interfaces_=[authorization.IID_ISecurityInformation]
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_public_methods_=['GetObjectInformation','GetSecurity','SetSecurity','GetAccessRights',
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'GetInheritTypes','MapGeneric','PropertySheetPageCallback']
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def __init__(self, ServiceName):
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self.ServiceName=ServiceName
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self._wrap_(self)
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def GetObjectInformation(self):
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"""Identifies object whose security will be modified, and determines options available
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to the end user"""
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flags=SI_ADVANCED|SI_EDIT_ALL|SI_PAGE_TITLE|SI_RESET
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hinstance=0 ## handle to module containing string resources
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servername='' ## name of authenticating server if not local machine
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## service name can contain remote machine name of the form \\Server\ServiceName
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objectname=os.path.split(self.ServiceName)[1]
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pagetitle='Service Permissions for '+self.ServiceName
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objecttype=IID_NULL
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return flags, hinstance, servername, objectname, pagetitle, objecttype
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def GetSecurity(self, requestedinfo, bdefault):
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"""Requests the existing permissions for object"""
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if bdefault:
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return win32security.SECURITY_DESCRIPTOR()
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else:
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return win32security.GetNamedSecurityInfo(self.ServiceName, win32security.SE_SERVICE, requestedinfo)
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def SetSecurity(self, requestedinfo, sd):
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"""Applies permissions to the object"""
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owner=sd.GetSecurityDescriptorOwner()
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group=sd.GetSecurityDescriptorGroup()
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dacl=sd.GetSecurityDescriptorDacl()
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sacl=sd.GetSecurityDescriptorSacl()
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win32security.SetNamedSecurityInfo(self.ServiceName, win32security.SE_SERVICE, requestedinfo,
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owner, group, dacl, sacl)
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def GetAccessRights(self, objecttype, flags):
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"""Returns a tuple of (AccessRights, DefaultAccess), where AccessRights is a sequence of tuples representing
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SI_ACCESS structs, containing (guid, access mask, Name, flags). DefaultAccess indicates which of the
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AccessRights will be used initially when a new ACE is added (zero based).
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Flags can contain SI_ACCESS_SPECIFIC,SI_ACCESS_GENERAL,SI_ACCESS_CONTAINER,SI_ACCESS_PROPERTY,
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CONTAINER_INHERIT_ACE,INHERIT_ONLY_ACE,OBJECT_INHERIT_ACE
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"""
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## input flags: SI_ADVANCED,SI_EDIT_AUDITS,SI_EDIT_PROPERTIES indicating which property sheet is requesting the rights
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if (objecttype is not None) and (objecttype!=IID_NULL):
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## Not relevent for services
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raise NotImplementedError("Object type is not supported")
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## ???? for some reason, the DACL for a service will not retain ACCESS_SYSTEM_SECURITY in an ACE ????
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## (IID_NULL, win32con.ACCESS_SYSTEM_SECURITY, 'View/change audit settings', SI_ACCESS_SPECIFIC),
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accessrights=[
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(IID_NULL, win32service.SERVICE_ALL_ACCESS, 'Full control', SI_ACCESS_GENERAL),
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(IID_NULL, SERVICE_GENERIC_READ, 'Generic read', SI_ACCESS_GENERAL),
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(IID_NULL, SERVICE_GENERIC_WRITE, 'Generic write', SI_ACCESS_GENERAL),
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(IID_NULL, SERVICE_GENERIC_EXECUTE, 'Start/Stop/Pause service', SI_ACCESS_GENERAL),
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(IID_NULL, READ_CONTROL, 'Read Permissions', SI_ACCESS_GENERAL),
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(IID_NULL, WRITE_DAC, 'Change permissions', SI_ACCESS_GENERAL),
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(IID_NULL, WRITE_OWNER, 'Change owner', SI_ACCESS_GENERAL),
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(IID_NULL, win32con.DELETE, 'Delete service', SI_ACCESS_GENERAL),
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(IID_NULL, win32service.SERVICE_START, 'Start service', SI_ACCESS_SPECIFIC),
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(IID_NULL, win32service.SERVICE_STOP, 'Stop service', SI_ACCESS_SPECIFIC),
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(IID_NULL, win32service.SERVICE_PAUSE_CONTINUE, 'Pause/unpause service', SI_ACCESS_SPECIFIC),
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(IID_NULL, win32service.SERVICE_USER_DEFINED_CONTROL, 'Execute user defined operations', SI_ACCESS_SPECIFIC),
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(IID_NULL, win32service.SERVICE_QUERY_CONFIG, 'Read configuration', SI_ACCESS_SPECIFIC),
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(IID_NULL, win32service.SERVICE_CHANGE_CONFIG, 'Change configuration', SI_ACCESS_SPECIFIC),
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(IID_NULL, win32service.SERVICE_ENUMERATE_DEPENDENTS, 'List dependent services', SI_ACCESS_SPECIFIC),
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(IID_NULL, win32service.SERVICE_QUERY_STATUS, 'Query status', SI_ACCESS_SPECIFIC),
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(IID_NULL, win32service.SERVICE_INTERROGATE, 'Query status (immediate)', SI_ACCESS_SPECIFIC),
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]
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return (accessrights, 0)
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def MapGeneric(self, guid, aceflags, mask):
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""" Converts generic access rights to specific rights.
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"""
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return win32security.MapGenericMask(mask,
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(SERVICE_GENERIC_READ, SERVICE_GENERIC_WRITE, SERVICE_GENERIC_EXECUTE, win32service.SERVICE_ALL_ACCESS))
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def GetInheritTypes(self):
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"""Specifies which types of ACE inheritance are supported.
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Services don't use any inheritance
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"""
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return ((IID_NULL, 0, 'Only current object'),)
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def PropertySheetPageCallback(self, hwnd, msg, pagetype):
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"""Invoked each time a property sheet page is created or destroyed."""
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## page types from SI_PAGE_TYPE enum: SI_PAGE_PERM SI_PAGE_ADVPERM SI_PAGE_AUDIT SI_PAGE_OWNER
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## msg: PSPCB_CREATE, PSPCB_RELEASE, PSPCB_SI_INITDIALOG
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return None
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def EditSecurity(self, owner_hwnd=0):
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"""Creates an ACL editor dialog based on parameters returned by interface methods"""
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isi=pythoncom.WrapObject(self, authorization.IID_ISecurityInformation, pythoncom.IID_IUnknown)
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authorization.EditSecurity(owner_hwnd, isi)
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if __name__=='__main__':
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# Find the first service on local machine and edit its permissions
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scm = win32service.OpenSCManager(None, None, win32service.SC_MANAGER_ENUMERATE_SERVICE)
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svcs=win32service.EnumServicesStatus(scm)
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win32service.CloseServiceHandle(scm)
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si=ServiceSecurity(svcs[0][0])
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si.EditSecurity()
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