[python-win32] Getting localized account name from RID

Mark Hammond mhammond at skippinet.com.au
Wed May 10 03:51:12 CEST 2006

Hi Sid,

> I need to get the localized account name for "BUILTIN\Users", which
> afaict maps to ntsecuritycon.DOMAIN_ALIAS_RID_USERS. But, given that,
> how do I get from the RID to the SID? (or to the account name which is
> what I want anyway).
> I've found the following article, but my C is not good enough to parse
> that.
> http://support.microsoft.com/default.aspx?kbid=157234

As you are trying to work with some code of mine that is broken on
non-English systems, I figured I should do my bit :)

Below is a port of that KB article to Python.  If cvs on sourceforge wasn't
giving me trouble, it would already be checked in as



# A Python port of the MS knowledge base article Q157234
# "How to deal with localized and renamed user and group names"
# http://support.microsoft.com/default.aspx?kbid=157234

import sys
from win32net import NetUserModalsGet
from win32security import LookupAccountSid
import pywintypes
from ntsecuritycon import *

def LookupAliasFromRid(TargetComputer, Rid):
    # Sid is the same regardless of machine, since the well-known
    # BUILTIN domain is referenced.
    sid = pywintypes.SID()
    sid.Initialize(SECURITY_NT_AUTHORITY, 2)

    for i, r in enumerate((SECURITY_BUILTIN_DOMAIN_RID, Rid)):
        sid.SetSubAuthority(i, r)

    name, domain, typ = LookupAccountSid(TargetComputer, sid)
    return name

def LookupUserGroupFromRid(TargetComputer, Rid):
    # get the account domain Sid on the target machine
    # note: if you were looking up multiple sids based on the same
    # account domain, only need to call this once.
    umi2 = NetUserModalsGet(TargetComputer, 2)
    domain_sid = umi2['domain_id']

    SubAuthorityCount = domain_sid.GetSubAuthorityCount()

    # create and init new sid with acct domain Sid + acct Rid
    sid = pywintypes.SID()

    # copy existing subauthorities from account domain Sid into
    # new Sid
    for i in range(SubAuthorityCount):
        sid.SetSubAuthority(i, domain_sid.GetSubAuthority(i))

    # append Rid to new Sid
    sid.SetSubAuthority(SubAuthorityCount, Rid)

    name, domain, typ = LookupAccountSid(TargetComputer, sid)
    return name

def main():
    if len(sys.argv) == 2:
        targetComputer = sys.argv[1]
        targetComputer = None

    name = LookupUserGroupFromRid(targetComputer, DOMAIN_USER_RID_ADMIN)
    print "'Administrator' user name = %s" % (name,)

    name = LookupAliasFromRid(targetComputer, DOMAIN_ALIAS_RID_ADMINS)
    print "'Administrators' local group/alias name = %s" % (name,)

if __name__=='__main__':

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