2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1997-2001.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 /* internal functions */
25 static struct passwd
*uname_string_combinations(char *s
, struct passwd
* (*fn
) (const char *), int N
);
26 static struct passwd
*uname_string_combinations2(char *s
, int offset
, struct passwd
* (*fn
) (const char *), int N
);
28 /*****************************************************************
29 Check if a user or group name is local (this is a *local* name for
30 *local* people, there's nothing for you here...).
31 *****************************************************************/
33 static BOOL
name_is_local(const char *name
)
35 return !(strchr_m(name
, *lp_winbind_separator()));
38 /*****************************************************************
39 Splits passed user or group name to domain and user/group name parts
40 Returns True if name was splitted and False otherwise.
41 *****************************************************************/
43 BOOL
split_domain_and_name(const char *name
, char *domain
, char* username
)
45 char *p
= strchr(name
,*lp_winbind_separator());
48 /* Parse a string of the form DOMAIN/user into a domain and a user */
49 DEBUG(10,("split_domain_and_name: checking whether name |%s| local or not\n", name
));
52 fstrcpy(username
, p
+1);
53 fstrcpy(domain
, name
);
54 domain
[PTR_DIFF(p
, name
)] = 0;
55 } else if (lp_winbind_use_default_domain()) {
56 fstrcpy(username
, name
);
57 fstrcpy(domain
, lp_workgroup());
62 DEBUG(10,("split_domain_and_name: all is fine, domain is |%s| and name is |%s|\n", domain
, username
));
66 /****************************************************************************
67 Get a users home directory.
68 ****************************************************************************/
70 char *get_user_home_dir(const char *user
)
72 static struct passwd
*pass
;
74 /* Ensure the user exists. */
76 pass
= Get_Pwnam(user
);
80 /* Return home directory from struct passwd. */
85 /*******************************************************************
86 Map a username from a dos name to a unix name by looking in the username
87 map. Note that this modifies the name in place.
88 This is the main function that should be called *once* on
89 any incoming or new username - in order to canonicalize the name.
90 This is being done to de-couple the case conversions from the user mapping
91 function. Previously, the map_username was being called
92 every time Get_Pwnam was called.
93 Returns True if username was changed, false otherwise.
94 ********************************************************************/
96 BOOL
map_username(char *user
)
98 static BOOL initialised
=False
;
99 static fstring last_from
,last_to
;
101 char *mapfile
= lp_username_map();
104 BOOL mapped_user
= False
;
113 *last_from
= *last_to
= 0;
117 if (strequal(user
,last_to
))
120 if (strequal(user
,last_from
)) {
121 DEBUG(3,("Mapped user %s to %s\n",user
,last_to
));
122 fstrcpy(user
,last_to
);
126 f
= x_fopen(mapfile
,O_RDONLY
, 0);
128 DEBUG(0,("can't open username map %s. Error %s\n",mapfile
, strerror(errno
) ));
132 DEBUG(4,("Scanning username map %s\n",mapfile
));
134 while((s
=fgets_slash(buf
,sizeof(buf
),f
))!=NULL
) {
136 char *dosname
= strchr_m(unixname
,'=');
138 BOOL return_if_mapped
= False
;
145 while (isspace((int)*unixname
))
148 if ('!' == *unixname
) {
149 return_if_mapped
= True
;
151 while (*unixname
&& isspace((int)*unixname
))
155 if (!*unixname
|| strchr_m("#;",*unixname
))
159 int l
= strlen(unixname
);
160 while (l
&& isspace((int)unixname
[l
-1])) {
166 dosuserlist
= str_list_make(dosname
, NULL
);
168 DEBUG(0,("Unable to build user list\n"));
172 if (strchr_m(dosname
,'*') || user_in_list(user
, (const char **)dosuserlist
, NULL
, 0)) {
173 DEBUG(3,("Mapped user %s to %s\n",user
,unixname
));
175 fstrcpy(last_from
,user
);
176 sscanf(unixname
,"%s",user
);
177 fstrcpy(last_to
,user
);
178 if(return_if_mapped
) {
179 str_list_free (&dosuserlist
);
185 str_list_free (&dosuserlist
);
191 * Setup the last_from and last_to as an optimization so
192 * that we don't scan the file again for the same user.
194 fstrcpy(last_from
,user
);
195 fstrcpy(last_to
,user
);
200 /****************************************************************************
201 * A wrapper for sys_getpwnam(). The following variations are tried:
203 * - in all lower case if this differs from transmitted
204 * - in all upper case if this differs from transmitted
205 * - using lp_usernamelevel() for permutations.
206 ****************************************************************************/
208 static struct passwd
*Get_Pwnam_ret
= NULL
;
210 static struct passwd
*Get_Pwnam_internals(const char *user
, char *user2
)
212 struct passwd
*ret
= NULL
;
214 if (!user2
|| !(*user2
))
217 if (!user
|| !(*user
))
220 /* Try in all lower case first as this is the most
221 common case on UNIX systems */
223 DEBUG(5,("Trying _Get_Pwnam(), username as lowercase is %s\n",user2
));
224 ret
= getpwnam_alloc(user2
);
228 /* Try as given, if username wasn't originally lowercase */
229 if(strcmp(user
, user2
) != 0) {
230 DEBUG(5,("Trying _Get_Pwnam(), username as given is %s\n", user
));
231 ret
= getpwnam_alloc(user
);
236 /* Try as uppercase, if username wasn't originally uppercase */
238 if(strcmp(user
, user2
) != 0) {
239 DEBUG(5,("Trying _Get_Pwnam(), username as uppercase is %s\n", user2
));
240 ret
= getpwnam_alloc(user2
);
245 /* Try all combinations up to usernamelevel */
247 DEBUG(5,("Checking combinations of %d uppercase letters in %s\n", lp_usernamelevel(), user2
));
248 ret
= uname_string_combinations(user2
, getpwnam_alloc
, lp_usernamelevel());
251 DEBUG(5,("Get_Pwnam_internals %s find user [%s]!\n",ret
? "did":"didn't", user
));
253 /* This call used to just return the 'passwd' static buffer.
254 This could then have accidental reuse implications, so
255 we now malloc a copy, and free it in the next use.
257 This should cause the (ab)user to segfault if it
260 This is better than useing the wrong data in security
263 The real fix is to make the callers free the returned
268 passwd_free(&Get_Pwnam_ret
);
276 /****************************************************************************
277 Get_Pwnam wrapper without modification.
278 NOTE: This with NOT modify 'user'!
279 ****************************************************************************/
281 struct passwd
*Get_Pwnam(const char *user
)
286 if ( *user
== '\0' ) {
287 DEBUG(10,("Get_Pwnam: empty username!\n"));
291 fstrcpy(user2
, user
);
293 DEBUG(5,("Finding user %s\n", user
));
295 ret
= Get_Pwnam_internals(user
, user2
);
300 /****************************************************************************
301 Check if a user is in a netgroup user list. If at first we don't succeed,
303 ****************************************************************************/
305 static BOOL
user_in_netgroup_list(const char *user
, const char *ngname
)
308 static char *mydomain
= NULL
;
309 fstring lowercase_user
, lowercase_ngname
;
311 if (mydomain
== NULL
)
312 yp_get_default_domain(&mydomain
);
314 if(mydomain
== NULL
) {
315 DEBUG(5,("Unable to get default yp domain\n"));
319 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
320 user
, mydomain
, ngname
));
321 DEBUG(5,("innetgr is %s\n", innetgr(ngname
, NULL
, user
, mydomain
)
322 ? "TRUE" : "FALSE"));
324 if (innetgr(ngname
, NULL
, user
, mydomain
))
328 * Ok, innetgr is case sensitive. Try once more with lowercase
329 * just in case. Attempt to fix #703. JRA.
332 fstrcpy(lowercase_user
, user
);
333 strlower_m(lowercase_user
);
334 fstrcpy(lowercase_ngname
, ngname
);
335 strlower_m(lowercase_ngname
);
337 if (innetgr(lowercase_ngname
, NULL
, lowercase_user
, mydomain
))
340 #endif /* HAVE_NETGROUP */
344 /****************************************************************************
345 Check if a user is in a winbind group.
346 ****************************************************************************/
348 static BOOL
user_in_winbind_group_list(const char *user
, const char *gname
, BOOL
*winbind_answered
)
351 gid_t gid
, gid_low
, gid_high
;
353 static gid_t
*groups
= NULL
;
354 static int num_groups
= 0;
355 static fstring last_user
= "";
357 *winbind_answered
= False
;
359 if ((gid
= nametogid(gname
)) == (gid_t
)-1) {
360 DEBUG(0,("user_in_winbind_group_list: nametogid for group %s failed.\n",
365 if (!lp_idmap_gid(&gid_low
, &gid_high
)) {
366 DEBUG(4, ("winbind gid range not configured, therefore %s cannot be a winbind group\n", gname
));
370 if (gid
< gid_low
|| gid
> gid_high
) {
371 DEBUG(4, ("group %s is not a winbind group\n", gname
));
375 /* try to user the last user we looked up */
376 /* otherwise fall back to lookups */
378 if ( !strequal( last_user
, user
) || !groups
)
380 /* clear any cached information */
383 fstrcpy( last_user
, "" );
386 * Get the gid's that this user belongs to.
389 if ((num_groups
= winbind_getgroups(user
, &groups
)) == -1)
392 if ( num_groups
== -1 )
395 if ( num_groups
== 0 ) {
396 *winbind_answered
= True
;
400 /* save the last username */
402 fstrcpy( last_user
, user
);
406 DEBUG(10,("user_in_winbind_group_list: using cached user groups for [%s]\n", user
));
408 if ( DEBUGLEVEL
>= 10 ) {
409 DEBUG(10,("user_in_winbind_group_list: using groups -- "));
410 for ( i
=0; i
<num_groups
; i
++ )
411 DEBUGADD(10,("%lu ", (unsigned long)groups
[i
]));
416 * Now we have the gid list for this user - convert the gname
417 * to a gid_t via either winbind or the local UNIX lookup and do the comparison.
420 for (i
= 0; i
< num_groups
; i
++) {
421 if (gid
== groups
[i
]) {
427 *winbind_answered
= True
;
433 *winbind_answered
= False
;
438 /****************************************************************************
439 Check if a user is in a UNIX group.
440 ****************************************************************************/
442 BOOL
user_in_unix_group_list(const char *user
,const char *gname
)
444 struct passwd
*pass
= Get_Pwnam(user
);
445 struct sys_userlist
*user_list
;
446 struct sys_userlist
*member
;
448 DEBUG(10,("user_in_unix_group_list: checking user %s in group %s\n", user
, gname
));
451 * We need to check the users primary group as this
452 * group is implicit and often not listed in the group database.
456 if (strequal(gname
,gidtoname(pass
->pw_gid
))) {
457 DEBUG(10,("user_in_unix_group_list: group %s is primary group.\n", gname
));
462 user_list
= get_users_in_group(gname
);
463 if (user_list
== NULL
) {
464 DEBUG(10,("user_in_unix_group_list: no such group %s\n", gname
));
468 for (member
= user_list
; member
; member
= member
->next
) {
469 DEBUG(10,("user_in_unix_group_list: checking user %s against member %s\n",
470 user
, member
->unix_name
));
471 if (strequal(member
->unix_name
,user
)) {
472 free_userlist(user_list
);
477 free_userlist(user_list
);
481 /****************************************************************************
482 Check if a user is in a group list. Ask winbind first, then use UNIX.
483 ****************************************************************************/
485 BOOL
user_in_group_list(const char *user
, const char *gname
, gid_t
*groups
, size_t n_groups
)
487 BOOL winbind_answered
= False
;
492 gid
= nametogid(gname
);
493 if (gid
== (gid_t
)-1)
496 if (groups
&& n_groups
> 0) {
497 for (i
=0; i
< n_groups
; i
++) {
498 if (groups
[i
] == gid
) {
505 /* fallback if we don't yet have the group list */
507 ret
= user_in_winbind_group_list(user
, gname
, &winbind_answered
);
508 if (!winbind_answered
)
509 ret
= user_in_unix_group_list(user
, gname
);
512 DEBUG(10,("user_in_group_list: user |%s| is in group |%s|\n", user
, gname
));
516 /****************************************************************************
517 Check if a user is in a user list - can check combinations of UNIX
519 ****************************************************************************/
521 BOOL
user_in_list(const char *user
,const char **list
, gid_t
*groups
, size_t n_groups
)
526 DEBUG(10,("user_in_list: checking user %s in list\n", user
));
530 DEBUG(10,("user_in_list: checking user |%s| against |%s|\n", user
, *list
));
533 * Check raw username.
535 if (strequal(user
, *list
))
539 * Now check to see if any combination
540 * of UNIX and netgroups has been specified.
545 * Old behaviour. Check netgroup list
546 * followed by UNIX list.
548 if(user_in_netgroup_list(user
, *list
+1))
550 if(user_in_group_list(user
, *list
+1, groups
, n_groups
))
552 } else if (**list
== '+') {
554 if((*(*list
+1)) == '&') {
556 * Search UNIX list followed by netgroup.
558 if(user_in_group_list(user
, *list
+2, groups
, n_groups
))
560 if(user_in_netgroup_list(user
, *list
+2))
566 * Just search UNIX list.
569 if(user_in_group_list(user
, *list
+1, groups
, n_groups
))
573 } else if (**list
== '&') {
575 if(*(*list
+1) == '+') {
577 * Search netgroup list followed by UNIX list.
579 if(user_in_netgroup_list(user
, *list
+2))
581 if(user_in_group_list(user
, *list
+2, groups
, n_groups
))
585 * Just search netgroup list.
587 if(user_in_netgroup_list(user
, *list
+1))
590 } else if (!name_is_local(*list
)) {
592 * If user name did not match and token is not
593 * a unix group and the token has a winbind separator in the
594 * name then see if it is a Windows group.
598 enum SID_NAME_USE name_type
;
599 BOOL winbind_answered
= False
;
601 fstring groupname
, domain
;
603 /* Parse a string of the form DOMAIN/user into a domain and a user */
605 char *p
= strchr(*list
,*lp_winbind_separator());
607 DEBUG(10,("user_in_list: checking if user |%s| is in winbind group |%s|\n", user
, *list
));
610 fstrcpy(groupname
, p
+1);
611 fstrcpy(domain
, *list
);
612 domain
[PTR_DIFF(p
, *list
)] = 0;
614 /* Check to see if name is a Windows group; Win2k native mode DCs
615 will return domain local groups; while NT4 or mixed mode 2k DCs
618 if ( winbind_lookup_name(domain
, groupname
, &g_sid
, &name_type
)
619 && ( name_type
==SID_NAME_DOM_GRP
||
620 (strequal(lp_workgroup(), domain
) && name_type
==SID_NAME_ALIAS
) ) )
623 /* Check if user name is in the Windows group */
624 ret
= user_in_winbind_group_list(user
, *list
, &winbind_answered
);
626 if (winbind_answered
&& ret
== True
) {
627 DEBUG(10,("user_in_list: user |%s| is in winbind group |%s|\n", user
, *list
));
639 /* The functions below have been taken from password.c and slightly modified */
640 /****************************************************************************
641 Apply a function to upper/lower case combinations
642 of a string and return true if one of them returns true.
643 Try all combinations with N uppercase letters.
644 offset is the first char to try and change (start with 0)
645 it assumes the string starts lowercased
646 ****************************************************************************/
648 static struct passwd
*uname_string_combinations2(char *s
,int offset
,struct passwd
*(*fn
)(const char *),int N
)
650 ssize_t len
= (ssize_t
)strlen(s
);
654 if (N
<= 0 || offset
>= len
)
657 for (i
=offset
;i
<(len
-(N
-1));i
++) {
659 if (!islower((int)c
))
662 ret
= uname_string_combinations2(s
,i
+1,fn
,N
-1);
670 /****************************************************************************
671 Apply a function to upper/lower case combinations
672 of a string and return true if one of them returns true.
673 Try all combinations with up to N uppercase letters.
674 offset is the first char to try and change (start with 0)
675 it assumes the string starts lowercased
676 ****************************************************************************/
678 static struct passwd
* uname_string_combinations(char *s
,struct passwd
* (*fn
)(const char *),int N
)
684 ret
= uname_string_combinations2(s
,0,fn
,n
);