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# define OLD_NTDOMAIN 1
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/*
Unix SMB / Netbios implementation .
Version 1.9 .
uid / user handling
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Copyright ( C ) Andrew Tridgell 1992 - 1998
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This program is free software ; you can redistribute it and / or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation ; either version 2 of the License , or
( at your option ) any later version .
This program is distributed in the hope that it will be useful ,
but WITHOUT ANY WARRANTY ; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
GNU General Public License for more details .
You should have received a copy of the GNU General Public License
along with this program ; if not , write to the Free Software
Foundation , Inc . , 675 Mass Ave , Cambridge , MA 0213 9 , USA .
*/
# include "includes.h"
extern int DEBUGLEVEL ;
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/* what user is current? */
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extern struct current_user current_user ;
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/****************************************************************************
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Become the guest user .
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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BOOL become_guest ( void )
{
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static struct passwd * pass = NULL ;
if ( ! pass )
pass = Get_Pwnam ( lp_guestaccount ( - 1 ) , True ) ;
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if ( ! pass )
return ( False ) ;
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# ifdef AIX
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/* MWW: From AIX FAQ patch to WU-ftpd: call initgroups before
setting IDs */
initgroups ( pass - > pw_name , ( gid_t ) pass - > pw_gid ) ;
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# endif
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set_sec_ctx ( pass - > pw_uid , pass - > pw_gid , 0 , NULL , NULL ) ;
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current_user . conn = NULL ;
current_user . vuid = UID_FIELD_INVALID ;
return True ;
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}
/*******************************************************************
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Check if a username is OK .
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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static BOOL check_user_ok ( connection_struct * conn , user_struct * vuser , int snum )
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{
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int i ;
for ( i = 0 ; i < conn - > uid_cache . entries ; i + + )
if ( conn - > uid_cache . list [ i ] = = vuser - > uid )
return ( True ) ;
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if ( ! user_ok ( vuser - > user . unix_name , snum ) )
return ( False ) ;
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i = conn - > uid_cache . entries % UID_CACHE_SIZE ;
conn - > uid_cache . list [ i ] = vuser - > uid ;
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if ( conn - > uid_cache . entries < UID_CACHE_SIZE )
conn - > uid_cache . entries + + ;
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return ( True ) ;
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}
delineation between smb and msrpc more marked. smbd now constructs
pdus, and then feeds them over either a "local" function call or a "remote"
function call to an msrpc service. the "remote" msrpc daemon, on the
other side of a unix socket, then calls the same "local" function that
smbd would, if the msrpc service were being run from inside smbd.
this allows a transition from local msrpc services (inside the same smbd
process) to remote (over a unix socket).
removed reference to pipes_struct in msrpc services. all msrpc processing
functions take rpcsrv_struct which is a structure containing state info
for the msrpc functions to decode and create pdus.
created become_vuser() which does everything not related to connection_struct
that become_user() does.
removed, as best i could, connection_struct dependencies from the nt spoolss
printing code.
todo: remove dcinfo from rpcsrv_struct because this stores NETLOGON-specific
info on a per-connection basis, and if the connection dies then so does
the info, and that's a fairly serious problem.
had to put pretty much everything that is in user_struct into parse_creds.c
to feed unix user info over to the msrpc daemons. why? because it's
expensive to do unix password/group database lookups, and it's definitely
expensive to do nt user profile lookups, not to mention pretty difficult
and if you did either of these it would introduce a complication /
unnecessary interdependency. so, send uid/gid/num_groups/gid_t* +
SID+num_rids+domain_group_rids* + unix username + nt username + nt domain
+ user session key etc. this is the MINIMUM info identified so far that's
actually implemented. missing bits include the called and calling
netbios names etc. (basically, anything that can be loaded into
standard_sub() and standard_sub_basic()...)
(This used to be commit aa3c659a8dba0437c17c60055a6ed30fdfecdb6d)
1999-12-12 01:25:49 +00:00
/****************************************************************************
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Become the user of a connection number .
delineation between smb and msrpc more marked. smbd now constructs
pdus, and then feeds them over either a "local" function call or a "remote"
function call to an msrpc service. the "remote" msrpc daemon, on the
other side of a unix socket, then calls the same "local" function that
smbd would, if the msrpc service were being run from inside smbd.
this allows a transition from local msrpc services (inside the same smbd
process) to remote (over a unix socket).
removed reference to pipes_struct in msrpc services. all msrpc processing
functions take rpcsrv_struct which is a structure containing state info
for the msrpc functions to decode and create pdus.
created become_vuser() which does everything not related to connection_struct
that become_user() does.
removed, as best i could, connection_struct dependencies from the nt spoolss
printing code.
todo: remove dcinfo from rpcsrv_struct because this stores NETLOGON-specific
info on a per-connection basis, and if the connection dies then so does
the info, and that's a fairly serious problem.
had to put pretty much everything that is in user_struct into parse_creds.c
to feed unix user info over to the msrpc daemons. why? because it's
expensive to do unix password/group database lookups, and it's definitely
expensive to do nt user profile lookups, not to mention pretty difficult
and if you did either of these it would introduce a complication /
unnecessary interdependency. so, send uid/gid/num_groups/gid_t* +
SID+num_rids+domain_group_rids* + unix username + nt username + nt domain
+ user session key etc. this is the MINIMUM info identified so far that's
actually implemented. missing bits include the called and calling
netbios names etc. (basically, anything that can be loaded into
standard_sub() and standard_sub_basic()...)
(This used to be commit aa3c659a8dba0437c17c60055a6ed30fdfecdb6d)
1999-12-12 01:25:49 +00:00
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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BOOL become_user ( connection_struct * conn , uint16 vuid )
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{
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user_struct * vuser = get_valid_user_struct ( vuid ) ;
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int snum ;
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gid_t gid ;
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uid_t uid ;
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char group_c ;
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BOOL must_free_token = False ;
NT_USER_TOKEN * token = NULL ;
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if ( ! conn ) {
DEBUG ( 2 , ( " Connection not open \n " ) ) ;
return ( False ) ;
}
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/*
* We need a separate check in security = share mode due to vuid
* always being UID_FIELD_INVALID . If we don ' t do this then
* in share mode security we are * always * changing uid ' s between
* SMB ' s - this hurts performance - Badly .
*/
if ( ( lp_security ( ) = = SEC_SHARE ) & & ( current_user . conn = = conn ) & &
( current_user . uid = = conn - > uid ) ) {
DEBUG ( 4 , ( " Skipping become_user - already user \n " ) ) ;
return ( True ) ;
} else if ( ( current_user . conn = = conn ) & &
( vuser ! = 0 ) & & ( current_user . vuid = = vuid ) & &
( current_user . uid = = vuser - > uid ) ) {
DEBUG ( 4 , ( " Skipping become_user - already user \n " ) ) ;
return ( True ) ;
}
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snum = SNUM ( conn ) ;
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if ( ( vuser ! = NULL ) & & ! check_user_ok ( conn , vuser , snum ) )
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return False ;
if ( conn - > force_user | |
lp_security ( ) = = SEC_SHARE | |
! ( vuser ) | | ( vuser - > guest ) ) {
uid = conn - > uid ;
gid = conn - > gid ;
current_user . groups = conn - > groups ;
current_user . ngroups = conn - > ngroups ;
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token = conn - > nt_user_token ;
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} else {
if ( ! vuser ) {
DEBUG ( 2 , ( " Invalid vuid used %d \n " , vuid ) ) ;
return ( False ) ;
}
uid = vuser - > uid ;
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gid = vuser - > gid ;
current_user . ngroups = vuser - > n_groups ;
current_user . groups = vuser - > groups ;
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token = vuser - > nt_user_token ;
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}
/*
* See if we should force group for this service .
* If so this overrides any group set in the force
* user code .
*/
if ( ( group_c = * lp_force_group ( snum ) ) ) {
if ( group_c = = ' + ' ) {
/*
* Only force group if the user is a member of
* the service group . Check the group memberships for
* this user ( we already have this ) to
* see if we should force the group .
*/
int i ;
for ( i = 0 ; i < current_user . ngroups ; i + + ) {
if ( current_user . groups [ i ] = = conn - > gid ) {
gid = conn - > gid ;
break ;
}
}
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} else {
gid = conn - > gid ;
}
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/*
* We ' ve changed the group list in the token - we must
* re - create it .
*/
token = create_nt_token ( uid , gid , current_user . ngroups , current_user . groups ) ;
must_free_token = True ;
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}
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set_sec_ctx ( uid , gid , current_user . ngroups , current_user . groups , token ) ;
/*
* Free the new token ( as set_sec_ctx copies it ) .
*/
if ( must_free_token )
delete_nt_token ( & token ) ;
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current_user . conn = conn ;
current_user . vuid = vuid ;
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DEBUG ( 5 , ( " become_user uid=(%d,%d) gid=(%d,%d) \n " ,
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( int ) getuid ( ) , ( int ) geteuid ( ) , ( int ) getgid ( ) , ( int ) getegid ( ) ) ) ;
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return ( True ) ;
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}
/****************************************************************************
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Unbecome the user of a connection number .
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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BOOL unbecome_user ( void )
{
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set_root_sec_ctx ( ) ;
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DEBUG ( 5 , ( " unbecome_user now uid=(%d,%d) gid=(%d,%d) \n " ,
( int ) getuid ( ) , ( int ) geteuid ( ) , ( int ) getgid ( ) , ( int ) getegid ( ) ) ) ;
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current_user . conn = NULL ;
current_user . vuid = UID_FIELD_INVALID ;
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return ( True ) ;
}
/****************************************************************************
Become the user of an authenticated connected named pipe .
When this is called we are currently running as the connection
user .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
BOOL become_authenticated_pipe_user ( pipes_struct * p )
{
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BOOL res = push_sec_ctx ( ) ;
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if ( ! res ) {
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return False ;
}
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set_sec_ctx ( p - > pipe_user . uid , p - > pipe_user . gid ,
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p - > pipe_user . ngroups , p - > pipe_user . groups , p - > pipe_user . nt_user_token ) ;
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return True ;
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}
/****************************************************************************
Unbecome the user of an authenticated connected named pipe .
When this is called we are running as the authenticated pipe
user and need to go back to being the connection user .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
BOOL unbecome_authenticated_pipe_user ( pipes_struct * p )
{
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return pop_sec_ctx ( ) ;
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}
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/* Temporarily become a root user. Must match with unbecome_root(). */
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void become_root ( void )
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{
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push_sec_ctx ( ) ;
set_root_sec_ctx ( ) ;
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}
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/* Unbecome the root user */
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void unbecome_root ( void )
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{
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pop_sec_ctx ( ) ;
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}
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/*****************************************************************
* THE CANONICAL * convert name to SID function .
Tries winbind first - then uses local lookup .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
BOOL lookup_name ( char * name , DOM_SID * psid , enum SID_NAME_USE * name_type )
{
extern pstring global_myname ;
fstring sid ;
if ( ! winbind_lookup_name ( name , psid , name_type ) ) {
BOOL ret ;
DEBUG ( 10 , ( " lookup_name: winbind lookup for %s failed - trying local \n " , name ) ) ;
ret = local_lookup_name ( global_myname , name , psid , name_type ) ;
if ( ret )
DEBUG ( 10 , ( " lookup_name : (local) %s -> SID %s (type %u) \n " ,
name , sid_to_string ( sid , psid ) ,
( unsigned int ) * name_type ) ) ;
else
DEBUG ( 10 , ( " lookup name : (local) %s failed. \n " ,
name ) ) ;
return ret ;
}
DEBUG ( 10 , ( " lookup_name (winbindd): %s -> SID %s (type %u) \n " ,
name , sid_to_string ( sid , psid ) , ( unsigned int ) * name_type ) ) ;
return True ;
}
/*****************************************************************
* THE CANONICAL * convert SID to name function .
Tries winbind first - then uses local lookup .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
BOOL lookup_sid ( DOM_SID * sid , fstring dom_name , fstring name , enum SID_NAME_USE * name_type )
{
if ( ! name_type )
return False ;
/* Check if this is our own sid. This should perhaps be done by
winbind ? For the moment handle it here . */
if ( sid - > num_auths = = 5 ) {
DOM_SID tmp_sid ;
uint32 rid ;
sid_copy ( & tmp_sid , sid ) ;
sid_split_rid ( & tmp_sid , & rid ) ;
if ( sid_equal ( & global_sam_sid , & tmp_sid ) ) {
return map_domain_sid_to_name ( & tmp_sid , dom_name ) & &
local_lookup_rid ( rid , name , name_type ) ;
}
}
if ( ! winbind_lookup_sid ( sid , dom_name , name , name_type ) ) {
fstring sid_str ;
DOM_SID tmp_sid ;
uint32 rid ;
DEBUG ( 10 , ( " lookup_sid: winbind lookup for SID %s failed - trying local. \n " , sid_to_string ( sid_str , sid ) ) ) ;
sid_copy ( & tmp_sid , sid ) ;
sid_split_rid ( & tmp_sid , & rid ) ;
return map_domain_sid_to_name ( & tmp_sid , dom_name ) & &
lookup_known_rid ( & tmp_sid , rid , name , name_type ) ;
}
return True ;
}
/*****************************************************************
* THE CANONICAL * convert uid_t to SID function .
Tries winbind first - then uses local lookup .
Returns SID pointer .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
DOM_SID * uid_to_sid ( DOM_SID * psid , uid_t uid )
{
fstring sid ;
if ( ! winbind_uid_to_sid ( psid , uid ) ) {
DEBUG ( 10 , ( " uid_to_sid: winbind lookup for uid %u failed - trying local. \n " , ( unsigned int ) uid ) ) ;
return local_uid_to_sid ( psid , uid ) ;
}
DEBUG ( 10 , ( " uid_to_sid: winbindd %u -> %s \n " ,
( unsigned int ) uid , sid_to_string ( sid , psid ) ) ) ;
return psid ;
}
/*****************************************************************
* THE CANONICAL * convert gid_t to SID function .
Tries winbind first - then uses local lookup .
Returns SID pointer .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
DOM_SID * gid_to_sid ( DOM_SID * psid , gid_t gid )
{
fstring sid ;
if ( ! winbind_gid_to_sid ( psid , gid ) ) {
DEBUG ( 10 , ( " gid_to_sid: winbind lookup for gid %u failed - trying local. \n " , ( unsigned int ) gid ) ) ;
return local_gid_to_sid ( psid , gid ) ;
}
DEBUG ( 10 , ( " gid_to_sid: winbindd %u -> %s \n " ,
( unsigned int ) gid , sid_to_string ( sid , psid ) ) ) ;
return psid ;
}
/*****************************************************************
* THE CANONICAL * convert SID to uid function .
Tries winbind first - then uses local lookup .
Returns True if this name is a user sid and the conversion
was done correctly , False if not .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
BOOL sid_to_uid ( DOM_SID * psid , uid_t * puid , enum SID_NAME_USE * sidtype )
{
fstring dom_name , name , sid_str ;
enum SID_NAME_USE name_type ;
* sidtype = SID_NAME_UNKNOWN ;
/*
* First we must look up the name and decide if this is a user sid .
*/
if ( ! winbind_lookup_sid ( psid , dom_name , name , & name_type ) ) {
DEBUG ( 10 , ( " sid_to_uid: winbind lookup for sid %s failed - trying local. \n " ,
sid_to_string ( sid_str , psid ) ) ) ;
return local_sid_to_uid ( puid , psid , sidtype ) ;
}
/*
* Ensure this is a user sid .
*/
if ( name_type ! = SID_NAME_USER ) {
DEBUG ( 10 , ( " sid_to_uid: winbind lookup succeeded but SID is not a uid (%u) \n " ,
( unsigned int ) name_type ) ) ;
return False ;
}
* sidtype = SID_NAME_USER ;
/*
* Get the uid for this SID .
*/
if ( ! winbind_sid_to_uid ( puid , psid ) ) {
DEBUG ( 10 , ( " sid_to_uid: winbind lookup for sid %s failed. \n " ,
sid_to_string ( sid_str , psid ) ) ) ;
return False ;
}
DEBUG ( 10 , ( " sid_to_uid: winbindd %s -> %u \n " ,
sid_to_string ( sid_str , psid ) ,
( unsigned int ) * puid ) ) ;
return True ;
}
/*****************************************************************
* THE CANONICAL * convert SID to gid function .
Tries winbind first - then uses local lookup .
Returns True if this name is a user sid and the conversion
was done correctly , False if not .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
BOOL sid_to_gid ( DOM_SID * psid , gid_t * pgid , enum SID_NAME_USE * sidtype )
{
fstring dom_name , name , sid_str ;
enum SID_NAME_USE name_type ;
* sidtype = SID_NAME_UNKNOWN ;
/*
* First we must look up the name and decide if this is a group sid .
*/
if ( ! winbind_lookup_sid ( psid , dom_name , name , & name_type ) ) {
DEBUG ( 10 , ( " sid_to_gid: winbind lookup for sid %s failed - trying local. \n " ,
sid_to_string ( sid_str , psid ) ) ) ;
return local_sid_to_gid ( pgid , psid , sidtype ) ;
}
/*
* Ensure this is a group sid .
*/
if ( ( name_type ! = SID_NAME_DOM_GRP ) & & ( name_type ! = SID_NAME_ALIAS ) & & ( name_type ! = SID_NAME_WKN_GRP ) ) {
DEBUG ( 10 , ( " sid_to_gid: winbind lookup succeeded but SID is not a know group (%u) \n " ,
( unsigned int ) name_type ) ) ;
return local_sid_to_gid ( pgid , psid , sidtype ) ;
}
* sidtype = name_type ;
/*
* Get the gid for this SID .
*/
if ( ! winbind_sid_to_gid ( pgid , psid ) ) {
DEBUG ( 10 , ( " sid_to_gid: winbind lookup for sid %s failed. \n " ,
sid_to_string ( sid_str , psid ) ) ) ;
return False ;
}
DEBUG ( 10 , ( " gid_to_uid: winbindd %s -> %u \n " ,
sid_to_string ( sid_str , psid ) ,
( unsigned int ) * pgid ) ) ;
return True ;
}
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# undef OLD_NTDOMAIN
