243 lines
8.4 KiB
Python
243 lines
8.4 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 ntsecuritycon
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import pythoncom
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import win32api
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import win32com.server.policy
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import win32con
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import win32security
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import win32service
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from win32com.authorization import authorization
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SERVICE_GENERIC_EXECUTE = (
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win32service.SERVICE_START
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| win32service.SERVICE_STOP
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| win32service.SERVICE_PAUSE_CONTINUE
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| win32service.SERVICE_USER_DEFINED_CONTROL
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)
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SERVICE_GENERIC_READ = (
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win32service.SERVICE_QUERY_CONFIG
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| win32service.SERVICE_QUERY_STATUS
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| win32service.SERVICE_INTERROGATE
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| win32service.SERVICE_ENUMERATE_DEPENDENTS
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)
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SERVICE_GENERIC_WRITE = win32service.SERVICE_CHANGE_CONFIG
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from ntsecuritycon import (
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CONTAINER_INHERIT_ACE,
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INHERIT_ONLY_ACE,
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OBJECT_INHERIT_ACE,
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PSPCB_SI_INITDIALOG,
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READ_CONTROL,
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SI_ACCESS_CONTAINER,
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SI_ACCESS_GENERAL,
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SI_ACCESS_PROPERTY,
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SI_ACCESS_SPECIFIC,
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SI_ADVANCED,
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SI_CONTAINER,
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SI_EDIT_ALL,
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SI_EDIT_AUDITS,
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SI_EDIT_PROPERTIES,
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SI_PAGE_ADVPERM,
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SI_PAGE_AUDIT,
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SI_PAGE_OWNER,
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SI_PAGE_PERM,
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SI_PAGE_TITLE,
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SI_RESET,
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STANDARD_RIGHTS_EXECUTE,
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STANDARD_RIGHTS_READ,
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STANDARD_RIGHTS_WRITE,
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WRITE_DAC,
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WRITE_OWNER,
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)
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from pythoncom import IID_NULL
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from win32com.shell.shellcon import ( # # Msg parameter to PropertySheetPageCallback
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PSPCB_CREATE,
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PSPCB_RELEASE,
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)
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from win32security import CONTAINER_INHERIT_ACE, INHERIT_ONLY_ACE, OBJECT_INHERIT_ACE
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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_ = [
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"GetObjectInformation",
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"GetSecurity",
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"SetSecurity",
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"GetAccessRights",
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"GetInheritTypes",
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"MapGeneric",
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"PropertySheetPageCallback",
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]
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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(
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self.ServiceName, win32security.SE_SERVICE, requestedinfo
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)
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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(
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self.ServiceName,
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win32security.SE_SERVICE,
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requestedinfo,
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owner,
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group,
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dacl,
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sacl,
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)
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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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(
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IID_NULL,
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win32service.SERVICE_ALL_ACCESS,
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"Full control",
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SI_ACCESS_GENERAL,
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),
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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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(
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IID_NULL,
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SERVICE_GENERIC_EXECUTE,
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"Start/Stop/Pause service",
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SI_ACCESS_GENERAL,
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),
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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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(
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IID_NULL,
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win32service.SERVICE_PAUSE_CONTINUE,
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"Pause/unpause service",
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SI_ACCESS_SPECIFIC,
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),
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(
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IID_NULL,
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win32service.SERVICE_USER_DEFINED_CONTROL,
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"Execute user defined operations",
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SI_ACCESS_SPECIFIC,
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),
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(
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IID_NULL,
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win32service.SERVICE_QUERY_CONFIG,
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"Read configuration",
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SI_ACCESS_SPECIFIC,
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),
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(
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IID_NULL,
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win32service.SERVICE_CHANGE_CONFIG,
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"Change configuration",
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SI_ACCESS_SPECIFIC,
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),
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(
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IID_NULL,
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win32service.SERVICE_ENUMERATE_DEPENDENTS,
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"List dependent services",
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SI_ACCESS_SPECIFIC,
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),
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(
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IID_NULL,
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win32service.SERVICE_QUERY_STATUS,
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"Query status",
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SI_ACCESS_SPECIFIC,
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),
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(
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IID_NULL,
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win32service.SERVICE_INTERROGATE,
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"Query status (immediate)",
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SI_ACCESS_SPECIFIC,
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),
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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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return win32security.MapGenericMask(
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mask,
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(
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SERVICE_GENERIC_READ,
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SERVICE_GENERIC_WRITE,
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SERVICE_GENERIC_EXECUTE,
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win32service.SERVICE_ALL_ACCESS,
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),
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)
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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(
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self, authorization.IID_ISecurityInformation, pythoncom.IID_IUnknown
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)
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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(
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None, None, win32service.SC_MANAGER_ENUMERATE_SERVICE
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)
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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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