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, &value, NULL);
104 TALLOC_FREE(*p_user_out);
105 *p_user_out = talloc_strdup(ctx, value);
113 static void store_map_in_gencache(TALLOC_CTX *ctx, const char *from, const char *to)
116 int cache_time = lp_username_map_cache_time();
118 if (cache_time == 0) {
122 key = talloc_asprintf_strupper_m(ctx, "USERNAME_MAP/%s",
127 gencache_set(key, to, cache_time + time(NULL));
131 /****************************************************************************
132 Check if a user is in a netgroup user list. If at first we don't succeed,
134 ****************************************************************************/
136 bool user_in_netgroup(TALLOC_CTX *ctx, const char *user, const char *ngname)
139 static char *my_yp_domain = NULL;
140 char *lowercase_user = NULL;
142 if (my_yp_domain == NULL) {
143 yp_get_default_domain(&my_yp_domain);
146 if (my_yp_domain == NULL) {
147 DEBUG(5,("Unable to get default yp domain, "
148 "let's try without specifying it\n"));
151 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
152 user, my_yp_domain?my_yp_domain:"(ANY)", ngname));
154 if (innetgr(ngname, NULL, user, my_yp_domain)) {
155 DEBUG(5,("user_in_netgroup: Found\n"));
160 * Ok, innetgr is case sensitive. Try once more with lowercase
161 * just in case. Attempt to fix #703. JRA.
163 lowercase_user = talloc_strdup(ctx, user);
164 if (!lowercase_user) {
167 if (!strlower_m(lowercase_user)) {
171 if (strcmp(user,lowercase_user) == 0) {
172 /* user name was already lower case! */
176 DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
177 lowercase_user, my_yp_domain?my_yp_domain:"(ANY)", ngname));
179 if (innetgr(ngname, NULL, lowercase_user, my_yp_domain)) {
180 DEBUG(5,("user_in_netgroup: Found\n"));
183 #endif /* HAVE_NETGROUP */
187 /****************************************************************************
188 Check if a user is in a user list - can check combinations of UNIX
190 ****************************************************************************/
192 bool user_in_list(TALLOC_CTX *ctx, const char *user,const char **list)
197 DEBUG(10,("user_in_list: checking user %s in list\n", user));
201 DEBUG(10,("user_in_list: checking user |%s| against |%s|\n",
205 * Check raw username.
207 if (strequal(user, *list))
211 * Now check to see if any combination
212 * of UNIX and netgroups has been specified.
217 * Old behaviour. Check netgroup list
218 * followed by UNIX list.
220 if(user_in_netgroup(ctx, user, *list +1))
222 if(user_in_group(user, *list +1))
224 } else if (**list == '+') {
226 if((*(*list +1)) == '&') {
228 * Search UNIX list followed by netgroup.
230 if(user_in_group(user, *list +2))
232 if(user_in_netgroup(ctx, user, *list +2))
238 * Just search UNIX list.
241 if(user_in_group(user, *list +1))
245 } else if (**list == '&') {
247 if(*(*list +1) == '+') {
249 * Search netgroup list followed by UNIX list.
251 if(user_in_netgroup(ctx, user, *list +2))
253 if(user_in_group(user, *list +2))
257 * Just search netgroup list.
259 if(user_in_netgroup(ctx, user, *list +1))
269 bool map_username(TALLOC_CTX *ctx, const char *user_in, char **p_user_out)
272 char *mapfile = lp_username_map(talloc_tos());
275 bool mapped_user = False;
276 char *cmd = lp_username_map_script(talloc_tos());
283 /* Initially make a copy of the incoming name. */
284 *p_user_out = talloc_strdup(ctx, user_in);
289 if (strequal(user_in,get_last_to()))
292 if (strequal(user_in,get_last_from())) {
293 DEBUG(3,("Mapped user %s to %s\n",user_in,get_last_to()));
294 TALLOC_FREE(*p_user_out);
295 *p_user_out = talloc_strdup(ctx, get_last_to());
299 if (fetch_map_from_gencache(ctx, user_in, p_user_out)) {
303 /* first try the username map script */
307 char *command = NULL;
308 int numlines, ret, fd;
310 command = talloc_asprintf(ctx,
318 DEBUG(10,("Running [%s]\n", command));
319 ret = smbrun(command, &fd);
320 DEBUGADD(10,("returned [%d]\n", ret));
322 TALLOC_FREE(command);
331 qlines = fd_lines_load(fd, &numlines, 0, ctx);
332 DEBUGADD(10,("Lines returned = [%d]\n", numlines));
335 /* should be either no lines or a single line with the mapped username */
337 if (numlines && qlines) {
338 DEBUG(3,("Mapped user %s to %s\n", user_in, qlines[0] ));
339 set_last_from_to(user_in, qlines[0]);
340 store_map_in_gencache(ctx, user_in, qlines[0]);
341 TALLOC_FREE(*p_user_out);
342 *p_user_out = talloc_strdup(ctx, qlines[0]);
350 return numlines != 0;
353 /* ok. let's try the mapfile */
357 f = x_fopen(mapfile,O_RDONLY, 0);
359 DEBUG(0,("can't open username map %s. Error %s\n",mapfile, strerror(errno) ));
363 DEBUG(4,("Scanning username map %s\n",mapfile));
365 while((s=fgets_slash(buf,sizeof(buf),f))!=NULL) {
367 char *dosname = strchr_m(unixname,'=');
369 bool return_if_mapped = False;
376 unixname = skip_space(unixname);
378 if ('!' == *unixname) {
379 return_if_mapped = True;
380 unixname = skip_space(unixname+1);
383 if (!*unixname || strchr_m("#;",*unixname))
387 int l = strlen(unixname);
388 while (l && isspace((int)unixname[l-1])) {
394 /* skip lines like 'user = ' */
396 dosuserlist = str_list_make_v3(ctx, dosname, NULL);
398 DEBUG(0,("Bad username map entry. Unable to build user list. Ignoring.\n"));
402 if (strchr_m(dosname,'*') ||
403 user_in_list(ctx, user_in, (const char **)dosuserlist)) {
404 DEBUG(3,("Mapped user %s to %s\n",user_in,unixname));
407 set_last_from_to(user_in, unixname);
408 store_map_in_gencache(ctx, user_in, unixname);
409 TALLOC_FREE(*p_user_out);
410 *p_user_out = talloc_strdup(ctx, unixname);
412 TALLOC_FREE(dosuserlist);
417 if ( return_if_mapped ) {
418 TALLOC_FREE(dosuserlist);
424 TALLOC_FREE(dosuserlist);
430 * If we didn't successfully map a user in the loop above,
431 * setup the last_from and last_to as an optimization so
432 * that we don't scan the file again for the same user.
435 DEBUG(8, ("The user '%s' has no mapping. "
436 "Skip it next time.\n", user_in));
437 set_last_from_to(user_in, user_in);
438 store_map_in_gencache(ctx, user_in, user_in);