2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1997-2001.
6 Copyright (C) Volker Lendecke 2006
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "system/filesys.h"
26 /*******************************************************************
27 Map a username from a dos name to a unix name by looking in the username
28 map. Note that this modifies the name in place.
29 This is the main function that should be called *once* on
30 any incoming or new username - in order to canonicalize the name.
31 This is being done to de-couple the case conversions from the user mapping
32 function. Previously, the map_username was being called
33 every time Get_Pwnam_alloc was called.
34 Returns True if username was changed, false otherwise.
35 ********************************************************************/
37 static char *last_from = NULL;
38 static char *last_to = NULL;
40 static const char *get_last_from(void)
48 static const char *get_last_to(void)
56 static bool set_last_from_to(const char *from, const char *to)
58 char *orig_from = last_from;
59 char *orig_to = last_to;
61 last_from = SMB_STRDUP(from);
62 last_to = SMB_STRDUP(to);
67 if (!last_from || !last_to) {
75 static char *skip_space(char *s)
77 while (isspace((int)(*s))) {
83 static bool fetch_map_from_gencache(TALLOC_CTX *ctx,
90 if (lp_username_map_cache_time() == 0) {
94 key = talloc_asprintf_strupper_m(ctx, "USERNAME_MAP/%s",
99 found = gencache_get(key, ctx, &value, NULL);
104 TALLOC_FREE(*p_user_out);
112 static void store_map_in_gencache(TALLOC_CTX *ctx, const char *from, const char *to)
115 int cache_time = lp_username_map_cache_time();
117 if (cache_time == 0) {
121 key = talloc_asprintf_strupper_m(ctx, "USERNAME_MAP/%s",
126 gencache_set(key, to, cache_time + time(NULL));
130 /****************************************************************************
131 Check if a user is in a netgroup user list. If at first we don't succeed,
133 ****************************************************************************/
135 bool user_in_netgroup(TALLOC_CTX *ctx, const char *user, const char *ngname)
138 static char *my_yp_domain = NULL;
139 char *lowercase_user = NULL;
141 if (my_yp_domain == NULL) {
142 yp_get_default_domain(&my_yp_domain);
145 if (my_yp_domain == NULL) {
146 DEBUG(5,("Unable to get default yp domain, "
147 "let's try without specifying it\n"));
150 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
151 user, my_yp_domain?my_yp_domain:"(ANY)", ngname));
153 if (innetgr(ngname, NULL, user, my_yp_domain)) {
154 DEBUG(5,("user_in_netgroup: Found\n"));
159 * Ok, innetgr is case sensitive. Try once more with lowercase
160 * just in case. Attempt to fix #703. JRA.
162 lowercase_user = talloc_strdup(ctx, user);
163 if (!lowercase_user) {
166 if (!strlower_m(lowercase_user)) {
170 if (strcmp(user,lowercase_user) == 0) {
171 /* user name was already lower case! */
175 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
176 lowercase_user, my_yp_domain?my_yp_domain:"(ANY)", ngname));
178 if (innetgr(ngname, NULL, lowercase_user, my_yp_domain)) {
179 DEBUG(5,("user_in_netgroup: Found\n"));
182 #endif /* HAVE_NETGROUP */
186 /****************************************************************************
187 Check if a user is in a user list - can check combinations of UNIX
189 ****************************************************************************/
191 bool user_in_list(TALLOC_CTX *ctx, const char *user,const char **list)
196 DEBUG(10,("user_in_list: checking user %s in list\n", user));
200 DEBUG(10,("user_in_list: checking user |%s| against |%s|\n",
204 * Check raw username.
206 if (strequal(user, *list))
210 * Now check to see if any combination
211 * of UNIX and netgroups has been specified.
216 * Old behaviour. Check netgroup list
217 * followed by UNIX list.
219 if(user_in_netgroup(ctx, user, *list +1))
221 if(user_in_group(user, *list +1))
223 } else if (**list == '+') {
225 if((*(*list +1)) == '&') {
227 * Search UNIX list followed by netgroup.
229 if(user_in_group(user, *list +2))
231 if(user_in_netgroup(ctx, user, *list +2))
237 * Just search UNIX list.
240 if(user_in_group(user, *list +1))
244 } else if (**list == '&') {
246 if(*(*list +1) == '+') {
248 * Search netgroup list followed by UNIX list.
250 if(user_in_netgroup(ctx, user, *list +2))
252 if(user_in_group(user, *list +2))
256 * Just search netgroup list.
258 if(user_in_netgroup(ctx, user, *list +1))
268 bool map_username(TALLOC_CTX *ctx, const char *user_in, char **p_user_out)
271 char *mapfile = lp_username_map(talloc_tos());
274 bool mapped_user = False;
275 char *cmd = lp_username_map_script(talloc_tos());
282 /* Initially make a copy of the incoming name. */
283 *p_user_out = talloc_strdup(ctx, user_in);
288 if (strequal(user_in,get_last_to()))
291 if (strequal(user_in,get_last_from())) {
292 DEBUG(3,("Mapped user %s to %s\n",user_in,get_last_to()));
293 TALLOC_FREE(*p_user_out);
294 *p_user_out = talloc_strdup(ctx, get_last_to());
298 if (fetch_map_from_gencache(ctx, user_in, p_user_out)) {
302 /* first try the username map script */
306 char *command = NULL;
307 int numlines, ret, fd;
309 command = talloc_asprintf(ctx,
317 DEBUG(10,("Running [%s]\n", command));
318 ret = smbrun(command, &fd);
319 DEBUGADD(10,("returned [%d]\n", ret));
321 TALLOC_FREE(command);
330 qlines = fd_lines_load(fd, &numlines, 0, ctx);
331 DEBUGADD(10,("Lines returned = [%d]\n", numlines));
334 /* should be either no lines or a single line with the mapped username */
336 if (numlines && qlines) {
337 DEBUG(3,("Mapped user %s to %s\n", user_in, qlines[0] ));
338 set_last_from_to(user_in, qlines[0]);
339 store_map_in_gencache(ctx, user_in, qlines[0]);
340 TALLOC_FREE(*p_user_out);
341 *p_user_out = talloc_strdup(ctx, qlines[0]);
349 return numlines != 0;
352 /* ok. let's try the mapfile */
356 f = x_fopen(mapfile,O_RDONLY, 0);
358 DEBUG(0,("can't open username map %s. Error %s\n",mapfile, strerror(errno) ));
362 DEBUG(4,("Scanning username map %s\n",mapfile));
364 while((s=fgets_slash(buf,sizeof(buf),f))!=NULL) {
366 char *dosname = strchr_m(unixname,'=');
368 bool return_if_mapped = False;
375 unixname = skip_space(unixname);
377 if ('!' == *unixname) {
378 return_if_mapped = True;
379 unixname = skip_space(unixname+1);
382 if (!*unixname || strchr_m("#;",*unixname))
386 int l = strlen(unixname);
387 while (l && isspace((int)unixname[l-1])) {
393 /* skip lines like 'user = ' */
395 dosuserlist = str_list_make_v3(ctx, dosname, NULL);
397 DEBUG(0,("Bad username map entry. Unable to build user list. Ignoring.\n"));
401 if (strchr_m(dosname,'*') ||
402 user_in_list(ctx, user_in, (const char **)dosuserlist)) {
403 DEBUG(3,("Mapped user %s to %s\n",user_in,unixname));
406 set_last_from_to(user_in, unixname);
407 store_map_in_gencache(ctx, user_in, unixname);
408 TALLOC_FREE(*p_user_out);
409 *p_user_out = talloc_strdup(ctx, unixname);
411 TALLOC_FREE(dosuserlist);
416 if ( return_if_mapped ) {
417 TALLOC_FREE(dosuserlist);
423 TALLOC_FREE(dosuserlist);
429 * If we didn't successfully map a user in the loop above,
430 * setup the last_from and last_to as an optimization so
431 * that we don't scan the file again for the same user.
434 DEBUG(8, ("The user '%s' has no mapping. "
435 "Skip it next time.\n", user_in));
436 set_last_from_to(user_in, user_in);
437 store_map_in_gencache(ctx, user_in, user_in);