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* sec_auth.cc (get_user_groups): Mark well-known groups as well-known.

Browse Source 
(get_user_local_groups): Ditto.
	(verify_token): Drop useless label.
	* sec_helper.cc (cygsid::get_sid): Check for well-known SID if
	well_known isn't set.
	* security.h (well_known_sid_type): New inline function.
This commit is contained in:
Corinna Vinschen 2011-04-04 09:00:02 +00:00
parent 0d6f2b0117
commit 99edadedc9
3 changed files with 29 additions and 9 deletions
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13
winsup/cygwin/sec_auth.cc
View File

@ -292,6 +292,8 @@ get_user_groups (WCHAR *logonserver, cygsidlist &grp_list,
wcscpy (dgroup + len, buf[i].grui0_name);
if (!LookupAccountNameW (NULL, dgroup, gsid, &glen, dom, &dlen, &use))
debug_printf ("LookupAccountName(%W), %E", dgroup);
else if (well_known_sid_type (use))
grp_list *= gsid;
else if (legal_sid_type (use))
grp_list += gsid;
else
@ -339,10 +341,12 @@ get_user_local_groups (PWCHAR logonserver, PWCHAR domain,
if (LookupAccountNameW (NULL, domlocal_grp, gsid, &glen,
dom, &domlen, &use))
{
if (!legal_sid_type (use))
debug_printf ("Rejecting local %W. use: %d", dg_ptr, use);
else
if (well_known_sid_type (use))
grp_list *= gsid;
else if (legal_sid_type (use))
grp_list += gsid;
else
debug_printf ("Rejecting local %W. use: %d", dg_ptr, use);
}
else if (GetLastError () == ERROR_NONE_MAPPED)
{
@ -762,14 +766,13 @@ verify_token (HANDLE token, cygsid &usersid, user_groups &groups, bool *pintern)
if (!saw[gidx]
&& !groups.sgsids.sids[gidx].is_well_known_sid ()
&& !sid_in_token_groups (my_grps, groups.sgsids.sids[gidx]))
goto done;
return false;
}
/* The primary group must be in the token */
ret = sawpg
|| sid_in_token_groups (my_grps, groups.pgsid)
|| groups.pgsid == usersid;
}
done:
return ret;
}

17
winsup/cygwin/sec_helper.cc
View File

@ -1,7 +1,7 @@
/* sec_helper.cc: NT security helper functions
Copyright 2000, 2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009,
2010 Red Hat, Inc.
2010, 2011 Red Hat, Inc.
Written by Corinna Vinschen <corinna@vinschen.de>
@ -150,7 +150,8 @@ PSID
cygsid::get_sid (DWORD s, DWORD cnt, DWORD *r, bool well_known)
{
DWORD i;
SID_IDENTIFIER_AUTHORITY sid_auth = {{0,0,0,0,0,0}};
SID_IDENTIFIER_AUTHORITY sid_auth = { SECURITY_NULL_SID_AUTHORITY };
# define SECURITY_NT_AUTH 5
if (s > 255 || cnt < 1 || cnt > 8)
{
@ -162,7 +163,17 @@ cygsid::get_sid (DWORD s, DWORD cnt, DWORD *r, bool well_known)
InitializeSid (psid, &sid_auth, cnt);
for (i = 0; i < cnt; ++i)
memcpy ((char *) psid + 8 + sizeof (DWORD) * i, &r[i], sizeof (DWORD));
well_known_sid = well_known;
/* If the well_known flag isn't set explicitely, we check the SID
for being a well-known SID ourselves. That's necessary because this
cygsid is created from a SID string, usually from /etc/passwd or
/etc/group. The calling code just doesn't know if the SID is well-known
or not. All SIDs are well-known SIDs, except those in the non-unique NT
authority range. */
if (well_known)
well_known_sid = well_known;
else
well_known_sid = (s != SECURITY_NT_AUTH
|| r[0] != SECURITY_NT_NON_UNIQUE_RID);
return psid;
}

8
winsup/cygwin/security.h
View File

@ -1,7 +1,7 @@
/* security.h: security declarations
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
2010 Red Hat, Inc.
2010, 2011 Red Hat, Inc.
This file is part of Cygwin.
@ -339,6 +339,12 @@ extern cygpsid well_known_samba_unix_user_fake_sid;
bool privilege_luid (const PWCHAR pname, LUID *luid);
inline BOOL
well_known_sid_type (SID_NAME_USE type)
{
return type == SidTypeAlias || type == SidTypeWellKnownGroup;
}
inline BOOL
legal_sid_type (SID_NAME_USE type)
{