1/*
2 * Copyright (c) 1995, 1996
3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
| 1/*
2 * Copyright (c) 1995, 1996
3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
|
34__FBSDID("$FreeBSD: head/usr.sbin/rpc.yppasswdd/yppasswdd_server.c 188766 2009-02-18 22:27:46Z imp $");
| 34__FBSDID("$FreeBSD: head/usr.sbin/rpc.yppasswdd/yppasswdd_server.c 231994 2012-02-22 06:27:20Z kevlo $");
|
35
36#include <sys/param.h>
37#include <sys/fcntl.h>
38#include <sys/socket.h>
39#include <sys/stat.h>
40#include <sys/wait.h>
41
42#include <arpa/inet.h>
43#include <netinet/in.h>
44
45#include <ctype.h>
46#include <db.h>
47#include <dirent.h>
48#include <errno.h>
49#include <limits.h>
50#include <pwd.h>
51#include <signal.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <unistd.h>
56
57#include <libgen.h>
58#include <libutil.h>
59
60#include <rpc/rpc.h>
61#include <rpcsvc/yp.h>
62struct dom_binding;
63#include <rpcsvc/ypclnt.h>
64#include "yppasswdd_extern.h"
65#include "yppasswd.h"
66#include "yppasswd_private.h"
67#include "ypxfr_extern.h"
68#include "yp_extern.h"
69
70static struct passwd yp_password;
71
72static void
73xlate_passwd(struct x_master_passwd *xpwd, struct passwd *pwd)
74{
75 pwd->pw_name = xpwd->pw_name;
76 pwd->pw_passwd = xpwd->pw_passwd;
77 pwd->pw_uid = xpwd->pw_uid;
78 pwd->pw_gid = xpwd->pw_gid;
79 pwd->pw_change = xpwd->pw_change;
80 pwd->pw_class = xpwd->pw_class;
81 pwd->pw_gecos = xpwd->pw_gecos;
82 pwd->pw_dir = xpwd->pw_dir;
83 pwd->pw_shell = xpwd->pw_shell;
84 pwd->pw_expire = xpwd->pw_expire;
85 pwd->pw_fields = xpwd->pw_fields;
86}
87
88static void
89copy_yp_pass(char *p, int x, int m)
90{
91 char *t, *s = p;
92 static char *buf;
93
94 yp_password.pw_fields = 0;
95
96 buf = realloc(buf, m + 10);
97 bzero(buf, m + 10);
98
99 /* Turn all colons into NULLs */
100 while (strchr(s, ':')) {
101 s = (strchr(s, ':') + 1);
102 *(s - 1)= '\0';
103 }
104
105 t = buf;
106#define EXPAND(e) e = t; while ((*t++ = *p++));
107 EXPAND(yp_password.pw_name);
108 yp_password.pw_fields |= _PWF_NAME;
109 EXPAND(yp_password.pw_passwd);
110 yp_password.pw_fields |= _PWF_PASSWD;
111 yp_password.pw_uid = atoi(p);
112 p += (strlen(p) + 1);
113 yp_password.pw_fields |= _PWF_UID;
114 yp_password.pw_gid = atoi(p);
115 p += (strlen(p) + 1);
116 yp_password.pw_fields |= _PWF_GID;
117 if (x) {
118 EXPAND(yp_password.pw_class);
119 yp_password.pw_fields |= _PWF_CLASS;
120 yp_password.pw_change = atol(p);
121 p += (strlen(p) + 1);
122 yp_password.pw_fields |= _PWF_CHANGE;
123 yp_password.pw_expire = atol(p);
124 p += (strlen(p) + 1);
125 yp_password.pw_fields |= _PWF_EXPIRE;
126 }
127 EXPAND(yp_password.pw_gecos);
128 yp_password.pw_fields |= _PWF_GECOS;
129 EXPAND(yp_password.pw_dir);
130 yp_password.pw_fields |= _PWF_DIR;
131 EXPAND(yp_password.pw_shell);
132 yp_password.pw_fields |= _PWF_SHELL;
133
134 return;
135}
136
137static int
138validchars(char *arg)
139{
140 size_t i;
141
142 for (i = 0; i < strlen(arg); i++) {
143 if (iscntrl(arg[i])) {
144 yp_error("string contains a control character");
145 return(1);
146 }
147 if (arg[i] == ':') {
148 yp_error("string contains a colon");
149 return(1);
150 }
151 /* Be evil: truncate strings with \n in them silently. */
152 if (arg[i] == '\n') {
153 arg[i] = '\0';
154 return(0);
155 }
156 }
157 return(0);
158}
159
160static int
161validate_master(struct passwd *opw __unused, struct x_master_passwd *npw)
162{
163
164 if (npw->pw_name[0] == '+' || npw->pw_name[0] == '-') {
165 yp_error("client tried to modify an NIS entry");
166 return(1);
167 }
168
169 if (validchars(npw->pw_shell)) {
170 yp_error("specified shell contains invalid characters");
171 return(1);
172 }
173
174 if (validchars(npw->pw_gecos)) {
175 yp_error("specified gecos field contains invalid characters");
176 return(1);
177 }
178
179 if (validchars(npw->pw_passwd)) {
180 yp_error("specified password contains invalid characters");
181 return(1);
182 }
183 return(0);
184}
185
186static int
187validate(struct passwd *opw, struct x_passwd *npw)
188{
189
190 if (npw->pw_name[0] == '+' || npw->pw_name[0] == '-') {
191 yp_error("client tried to modify an NIS entry");
192 return(1);
193 }
194
195 if ((uid_t)npw->pw_uid != opw->pw_uid) {
196 yp_error("UID mismatch: client says user %s has UID %d",
197 npw->pw_name, npw->pw_uid);
198 yp_error("database says user %s has UID %d", opw->pw_name,
199 opw->pw_uid);
200 return(1);
201 }
202
203 if ((gid_t)npw->pw_gid != opw->pw_gid) {
204 yp_error("GID mismatch: client says user %s has GID %d",
205 npw->pw_name, npw->pw_gid);
206 yp_error("database says user %s has GID %d", opw->pw_name,
207 opw->pw_gid);
208 return(1);
209 }
210
211 /*
212 * Don't allow the user to shoot himself in the foot,
213 * even on purpose.
214 */
215 if (!ok_shell(npw->pw_shell)) {
216 yp_error("%s is not a valid shell", npw->pw_shell);
217 return(1);
218 }
219
220 if (validchars(npw->pw_shell)) {
221 yp_error("specified shell contains invalid characters");
222 return(1);
223 }
224
225 if (validchars(npw->pw_gecos)) {
226 yp_error("specified gecos field contains invalid characters");
227 return(1);
228 }
229
230 if (validchars(npw->pw_passwd)) {
231 yp_error("specified password contains invalid characters");
232 return(1);
233 }
234 return(0);
235}
236
237/*
238 * Kludge alert:
239 * In order to have one rpc.yppasswdd support multiple domains,
240 * we have to cheat: we search each directory under /var/yp
241 * and try to match the user in each master.passwd.byname
242 * map that we find. If the user matches (username, uid and gid
243 * all agree), then we use that domain. If we match the user in
244 * more than one database, we must abort.
245 */
246static char *
247find_domain(struct x_passwd *pw)
248{
249 struct stat statbuf;
250 struct dirent *dirp;
251 DIR *dird;
252 char yp_mapdir[MAXPATHLEN + 2];
253 static char domain[YPMAXDOMAIN];
254 char *tmp = NULL;
255 DBT key, data;
256 int hit = 0;
257
258 yp_error("performing multidomain lookup");
259
260 if ((dird = opendir(yp_dir)) == NULL) {
261 yp_error("opendir(%s) failed: %s", yp_dir, strerror(errno));
262 return(NULL);
263 }
264
265 while ((dirp = readdir(dird)) != NULL) {
266 snprintf(yp_mapdir, sizeof yp_mapdir, "%s/%s",
267 yp_dir, dirp->d_name);
268 if (stat(yp_mapdir, &statbuf) < 0) {
269 yp_error("stat(%s) failed: %s", yp_mapdir,
270 strerror(errno));
271 closedir(dird);
272 return(NULL);
273 }
274 if (S_ISDIR(statbuf.st_mode)) {
275 tmp = (char *)dirp->d_name;
276 key.data = pw->pw_name;
277 key.size = strlen(pw->pw_name);
278
279 if (yp_get_record(tmp,"master.passwd.byname",
280 &key, &data, 0) != YP_TRUE) {
281 continue;
282 }
283 *((char *)data.data + data.size) = '\0';
284 copy_yp_pass(data.data, 1, data.size);
285 if (yp_password.pw_uid == (uid_t)pw->pw_uid &&
286 yp_password.pw_gid == (gid_t)pw->pw_gid) {
287 hit++;
288 snprintf(domain, YPMAXDOMAIN, "%s", tmp);
289 }
290 }
291 }
292
293 closedir(dird);
294 if (hit > 1) {
295 yp_error("found same user in two different domains");
296 return(NULL);
297 } else
298 return((char *)&domain);
299}
300
301static const char *maps[] = {
302 "master.passwd.byname",
303 "master.passwd.byuid",
304 "passwd.byname",
305 "passwd.byuid"
306};
307
308static const char *formats[] = {
309 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s",
310 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s",
311 "%s:%s:%d:%d:%s:%s:%s",
312 "%s:%s:%d:%d:%s:%s:%s"
313};
314
315static int
316update_inplace(struct passwd *pw, char *domain)
317{
318 DB *dbp = NULL;
319 DBT key = { NULL, 0 };
320 DBT data = { NULL, 0 };
321 char pwbuf[YPMAXRECORD];
322 char keybuf[20];
323 int i;
324 char *ptr = NULL;
325 static char yp_last[] = "YP_LAST_MODIFIED";
326 char yplastbuf[YPMAXRECORD];
327
328 snprintf(yplastbuf, sizeof yplastbuf, "%llu",
329 (unsigned long long)time(NULL));
330
331 for (i = 0; i < 4; i++) {
332
333 if (i % 2) {
334 snprintf(keybuf, sizeof keybuf,
335 "%llu", (unsigned long long)pw->pw_uid);
336 key.data = &keybuf;
337 key.size = strlen(keybuf);
338 } else {
339 key.data = pw->pw_name;
340 key.size = strlen(pw->pw_name);
341 }
342
343 /*
344 * XXX The passwd.byname and passwd.byuid maps come in
345 * two flavors: secure and insecure. The secure version
346 * has a '*' in the password field whereas the insecure one
347 * has a real crypted password. The maps will be insecure
348 * if they were built with 'unsecure = TRUE' enabled in
349 * /var/yp/Makefile, but we'd have no way of knowing if
350 * this has been done unless we were to try parsing the
351 * Makefile, which is a disgusting thought. Instead, we
352 * read the records from the maps, skip to the first ':'
353 * in them, and then look at the character immediately
354 * following it. If it's an '*' then the map is 'secure'
355 * and we must not insert a real password into the pw_passwd
356 * field. If it's not an '*', then we put the real crypted
357 * password in.
358 */
359 if (yp_get_record(domain,maps[i],&key,&data,1) != YP_TRUE) {
360 yp_error("couldn't read %s/%s: %s", domain,
361 maps[i], strerror(errno));
362 return(1);
363 }
364
365 if ((ptr = strchr(data.data, ':')) == NULL) {
366 yp_error("no colon in passwd record?!");
367 return(1);
368 }
369
370 /*
371 * XXX Supposing we have more than one user with the same
372 * UID? (Or more than one user with the same name?) We could
373 * end up modifying the wrong record if were not careful.
374 */
375 if (i % 2) {
376 if (strncmp(data.data, pw->pw_name,
377 strlen(pw->pw_name))) {
378 yp_error("warning: found entry for UID %d \
379in map %s@%s with wrong name (%.*s)", pw->pw_uid, maps[i], domain,
380 (int)(ptr - (char *)data.data),
381 (char *)data.data);
382 yp_error("there may be more than one user \
383with the same UID - continuing");
384 continue;
385 }
386 } else {
387 /*
388 * We're really being ultra-paranoid here.
389 * This is generally a 'can't happen' condition.
390 */
391 snprintf(pwbuf, sizeof pwbuf, ":%d:%d:", pw->pw_uid,
392 pw->pw_gid);
393 if (!strstr(data.data, pwbuf)) {
394 yp_error("warning: found entry for user %s \
395in map %s@%s with wrong UID", pw->pw_name, maps[i], domain);
396 yp_error("there may be more than one user \
397with the same name - continuing");
398 continue;
399 }
400 }
401
402 if (i < 2) {
403 snprintf(pwbuf, sizeof pwbuf, formats[i],
404 pw->pw_name, pw->pw_passwd, pw->pw_uid,
405 pw->pw_gid, pw->pw_class, pw->pw_change,
406 pw->pw_expire, pw->pw_gecos, pw->pw_dir,
407 pw->pw_shell);
408 } else {
409 snprintf(pwbuf, sizeof pwbuf, formats[i],
410 pw->pw_name, *(ptr+1) == '*' ? "*" : pw->pw_passwd,
411 pw->pw_uid, pw->pw_gid, pw->pw_gecos, pw->pw_dir,
412 pw->pw_shell);
413 }
414
415#define FLAGS O_RDWR|O_CREAT
416
417 if ((dbp = yp_open_db_rw(domain, maps[i], FLAGS)) == NULL) {
418 yp_error("couldn't open %s/%s r/w: %s",domain,
419 maps[i],strerror(errno));
420 return(1);
421 }
422
423 data.data = pwbuf;
424 data.size = strlen(pwbuf);
425
426 if (yp_put_record(dbp, &key, &data, 1) != YP_TRUE) {
427 yp_error("failed to update record in %s/%s", domain,
428 maps[i]);
429 (void)(dbp->close)(dbp);
430 return(1);
431 }
432
433 key.data = yp_last;
434 key.size = strlen(yp_last);
435 data.data = (char *)&yplastbuf;
436 data.size = strlen(yplastbuf);
437
438 if (yp_put_record(dbp, &key, &data, 1) != YP_TRUE) {
439 yp_error("failed to update timestamp in %s/%s", domain,
440 maps[i]);
441 (void)(dbp->close)(dbp);
442 return(1);
443 }
444
445 (void)(dbp->close)(dbp);
446 }
447
448 return(0);
449}
450
451int *
452yppasswdproc_update_1_svc(yppasswd *argp, struct svc_req *rqstp)
453{
454 static int result;
455 struct sockaddr_in *rqhost;
456 DBT key, data;
457 int rval = 0;
458 int pfd, tfd;
459 int pid;
460 int passwd_changed = 0;
461 int shell_changed = 0;
462 int gecos_changed = 0;
| 35
36#include <sys/param.h>
37#include <sys/fcntl.h>
38#include <sys/socket.h>
39#include <sys/stat.h>
40#include <sys/wait.h>
41
42#include <arpa/inet.h>
43#include <netinet/in.h>
44
45#include <ctype.h>
46#include <db.h>
47#include <dirent.h>
48#include <errno.h>
49#include <limits.h>
50#include <pwd.h>
51#include <signal.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <unistd.h>
56
57#include <libgen.h>
58#include <libutil.h>
59
60#include <rpc/rpc.h>
61#include <rpcsvc/yp.h>
62struct dom_binding;
63#include <rpcsvc/ypclnt.h>
64#include "yppasswdd_extern.h"
65#include "yppasswd.h"
66#include "yppasswd_private.h"
67#include "ypxfr_extern.h"
68#include "yp_extern.h"
69
70static struct passwd yp_password;
71
72static void
73xlate_passwd(struct x_master_passwd *xpwd, struct passwd *pwd)
74{
75 pwd->pw_name = xpwd->pw_name;
76 pwd->pw_passwd = xpwd->pw_passwd;
77 pwd->pw_uid = xpwd->pw_uid;
78 pwd->pw_gid = xpwd->pw_gid;
79 pwd->pw_change = xpwd->pw_change;
80 pwd->pw_class = xpwd->pw_class;
81 pwd->pw_gecos = xpwd->pw_gecos;
82 pwd->pw_dir = xpwd->pw_dir;
83 pwd->pw_shell = xpwd->pw_shell;
84 pwd->pw_expire = xpwd->pw_expire;
85 pwd->pw_fields = xpwd->pw_fields;
86}
87
88static void
89copy_yp_pass(char *p, int x, int m)
90{
91 char *t, *s = p;
92 static char *buf;
93
94 yp_password.pw_fields = 0;
95
96 buf = realloc(buf, m + 10);
97 bzero(buf, m + 10);
98
99 /* Turn all colons into NULLs */
100 while (strchr(s, ':')) {
101 s = (strchr(s, ':') + 1);
102 *(s - 1)= '\0';
103 }
104
105 t = buf;
106#define EXPAND(e) e = t; while ((*t++ = *p++));
107 EXPAND(yp_password.pw_name);
108 yp_password.pw_fields |= _PWF_NAME;
109 EXPAND(yp_password.pw_passwd);
110 yp_password.pw_fields |= _PWF_PASSWD;
111 yp_password.pw_uid = atoi(p);
112 p += (strlen(p) + 1);
113 yp_password.pw_fields |= _PWF_UID;
114 yp_password.pw_gid = atoi(p);
115 p += (strlen(p) + 1);
116 yp_password.pw_fields |= _PWF_GID;
117 if (x) {
118 EXPAND(yp_password.pw_class);
119 yp_password.pw_fields |= _PWF_CLASS;
120 yp_password.pw_change = atol(p);
121 p += (strlen(p) + 1);
122 yp_password.pw_fields |= _PWF_CHANGE;
123 yp_password.pw_expire = atol(p);
124 p += (strlen(p) + 1);
125 yp_password.pw_fields |= _PWF_EXPIRE;
126 }
127 EXPAND(yp_password.pw_gecos);
128 yp_password.pw_fields |= _PWF_GECOS;
129 EXPAND(yp_password.pw_dir);
130 yp_password.pw_fields |= _PWF_DIR;
131 EXPAND(yp_password.pw_shell);
132 yp_password.pw_fields |= _PWF_SHELL;
133
134 return;
135}
136
137static int
138validchars(char *arg)
139{
140 size_t i;
141
142 for (i = 0; i < strlen(arg); i++) {
143 if (iscntrl(arg[i])) {
144 yp_error("string contains a control character");
145 return(1);
146 }
147 if (arg[i] == ':') {
148 yp_error("string contains a colon");
149 return(1);
150 }
151 /* Be evil: truncate strings with \n in them silently. */
152 if (arg[i] == '\n') {
153 arg[i] = '\0';
154 return(0);
155 }
156 }
157 return(0);
158}
159
160static int
161validate_master(struct passwd *opw __unused, struct x_master_passwd *npw)
162{
163
164 if (npw->pw_name[0] == '+' || npw->pw_name[0] == '-') {
165 yp_error("client tried to modify an NIS entry");
166 return(1);
167 }
168
169 if (validchars(npw->pw_shell)) {
170 yp_error("specified shell contains invalid characters");
171 return(1);
172 }
173
174 if (validchars(npw->pw_gecos)) {
175 yp_error("specified gecos field contains invalid characters");
176 return(1);
177 }
178
179 if (validchars(npw->pw_passwd)) {
180 yp_error("specified password contains invalid characters");
181 return(1);
182 }
183 return(0);
184}
185
186static int
187validate(struct passwd *opw, struct x_passwd *npw)
188{
189
190 if (npw->pw_name[0] == '+' || npw->pw_name[0] == '-') {
191 yp_error("client tried to modify an NIS entry");
192 return(1);
193 }
194
195 if ((uid_t)npw->pw_uid != opw->pw_uid) {
196 yp_error("UID mismatch: client says user %s has UID %d",
197 npw->pw_name, npw->pw_uid);
198 yp_error("database says user %s has UID %d", opw->pw_name,
199 opw->pw_uid);
200 return(1);
201 }
202
203 if ((gid_t)npw->pw_gid != opw->pw_gid) {
204 yp_error("GID mismatch: client says user %s has GID %d",
205 npw->pw_name, npw->pw_gid);
206 yp_error("database says user %s has GID %d", opw->pw_name,
207 opw->pw_gid);
208 return(1);
209 }
210
211 /*
212 * Don't allow the user to shoot himself in the foot,
213 * even on purpose.
214 */
215 if (!ok_shell(npw->pw_shell)) {
216 yp_error("%s is not a valid shell", npw->pw_shell);
217 return(1);
218 }
219
220 if (validchars(npw->pw_shell)) {
221 yp_error("specified shell contains invalid characters");
222 return(1);
223 }
224
225 if (validchars(npw->pw_gecos)) {
226 yp_error("specified gecos field contains invalid characters");
227 return(1);
228 }
229
230 if (validchars(npw->pw_passwd)) {
231 yp_error("specified password contains invalid characters");
232 return(1);
233 }
234 return(0);
235}
236
237/*
238 * Kludge alert:
239 * In order to have one rpc.yppasswdd support multiple domains,
240 * we have to cheat: we search each directory under /var/yp
241 * and try to match the user in each master.passwd.byname
242 * map that we find. If the user matches (username, uid and gid
243 * all agree), then we use that domain. If we match the user in
244 * more than one database, we must abort.
245 */
246static char *
247find_domain(struct x_passwd *pw)
248{
249 struct stat statbuf;
250 struct dirent *dirp;
251 DIR *dird;
252 char yp_mapdir[MAXPATHLEN + 2];
253 static char domain[YPMAXDOMAIN];
254 char *tmp = NULL;
255 DBT key, data;
256 int hit = 0;
257
258 yp_error("performing multidomain lookup");
259
260 if ((dird = opendir(yp_dir)) == NULL) {
261 yp_error("opendir(%s) failed: %s", yp_dir, strerror(errno));
262 return(NULL);
263 }
264
265 while ((dirp = readdir(dird)) != NULL) {
266 snprintf(yp_mapdir, sizeof yp_mapdir, "%s/%s",
267 yp_dir, dirp->d_name);
268 if (stat(yp_mapdir, &statbuf) < 0) {
269 yp_error("stat(%s) failed: %s", yp_mapdir,
270 strerror(errno));
271 closedir(dird);
272 return(NULL);
273 }
274 if (S_ISDIR(statbuf.st_mode)) {
275 tmp = (char *)dirp->d_name;
276 key.data = pw->pw_name;
277 key.size = strlen(pw->pw_name);
278
279 if (yp_get_record(tmp,"master.passwd.byname",
280 &key, &data, 0) != YP_TRUE) {
281 continue;
282 }
283 *((char *)data.data + data.size) = '\0';
284 copy_yp_pass(data.data, 1, data.size);
285 if (yp_password.pw_uid == (uid_t)pw->pw_uid &&
286 yp_password.pw_gid == (gid_t)pw->pw_gid) {
287 hit++;
288 snprintf(domain, YPMAXDOMAIN, "%s", tmp);
289 }
290 }
291 }
292
293 closedir(dird);
294 if (hit > 1) {
295 yp_error("found same user in two different domains");
296 return(NULL);
297 } else
298 return((char *)&domain);
299}
300
301static const char *maps[] = {
302 "master.passwd.byname",
303 "master.passwd.byuid",
304 "passwd.byname",
305 "passwd.byuid"
306};
307
308static const char *formats[] = {
309 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s",
310 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s",
311 "%s:%s:%d:%d:%s:%s:%s",
312 "%s:%s:%d:%d:%s:%s:%s"
313};
314
315static int
316update_inplace(struct passwd *pw, char *domain)
317{
318 DB *dbp = NULL;
319 DBT key = { NULL, 0 };
320 DBT data = { NULL, 0 };
321 char pwbuf[YPMAXRECORD];
322 char keybuf[20];
323 int i;
324 char *ptr = NULL;
325 static char yp_last[] = "YP_LAST_MODIFIED";
326 char yplastbuf[YPMAXRECORD];
327
328 snprintf(yplastbuf, sizeof yplastbuf, "%llu",
329 (unsigned long long)time(NULL));
330
331 for (i = 0; i < 4; i++) {
332
333 if (i % 2) {
334 snprintf(keybuf, sizeof keybuf,
335 "%llu", (unsigned long long)pw->pw_uid);
336 key.data = &keybuf;
337 key.size = strlen(keybuf);
338 } else {
339 key.data = pw->pw_name;
340 key.size = strlen(pw->pw_name);
341 }
342
343 /*
344 * XXX The passwd.byname and passwd.byuid maps come in
345 * two flavors: secure and insecure. The secure version
346 * has a '*' in the password field whereas the insecure one
347 * has a real crypted password. The maps will be insecure
348 * if they were built with 'unsecure = TRUE' enabled in
349 * /var/yp/Makefile, but we'd have no way of knowing if
350 * this has been done unless we were to try parsing the
351 * Makefile, which is a disgusting thought. Instead, we
352 * read the records from the maps, skip to the first ':'
353 * in them, and then look at the character immediately
354 * following it. If it's an '*' then the map is 'secure'
355 * and we must not insert a real password into the pw_passwd
356 * field. If it's not an '*', then we put the real crypted
357 * password in.
358 */
359 if (yp_get_record(domain,maps[i],&key,&data,1) != YP_TRUE) {
360 yp_error("couldn't read %s/%s: %s", domain,
361 maps[i], strerror(errno));
362 return(1);
363 }
364
365 if ((ptr = strchr(data.data, ':')) == NULL) {
366 yp_error("no colon in passwd record?!");
367 return(1);
368 }
369
370 /*
371 * XXX Supposing we have more than one user with the same
372 * UID? (Or more than one user with the same name?) We could
373 * end up modifying the wrong record if were not careful.
374 */
375 if (i % 2) {
376 if (strncmp(data.data, pw->pw_name,
377 strlen(pw->pw_name))) {
378 yp_error("warning: found entry for UID %d \
379in map %s@%s with wrong name (%.*s)", pw->pw_uid, maps[i], domain,
380 (int)(ptr - (char *)data.data),
381 (char *)data.data);
382 yp_error("there may be more than one user \
383with the same UID - continuing");
384 continue;
385 }
386 } else {
387 /*
388 * We're really being ultra-paranoid here.
389 * This is generally a 'can't happen' condition.
390 */
391 snprintf(pwbuf, sizeof pwbuf, ":%d:%d:", pw->pw_uid,
392 pw->pw_gid);
393 if (!strstr(data.data, pwbuf)) {
394 yp_error("warning: found entry for user %s \
395in map %s@%s with wrong UID", pw->pw_name, maps[i], domain);
396 yp_error("there may be more than one user \
397with the same name - continuing");
398 continue;
399 }
400 }
401
402 if (i < 2) {
403 snprintf(pwbuf, sizeof pwbuf, formats[i],
404 pw->pw_name, pw->pw_passwd, pw->pw_uid,
405 pw->pw_gid, pw->pw_class, pw->pw_change,
406 pw->pw_expire, pw->pw_gecos, pw->pw_dir,
407 pw->pw_shell);
408 } else {
409 snprintf(pwbuf, sizeof pwbuf, formats[i],
410 pw->pw_name, *(ptr+1) == '*' ? "*" : pw->pw_passwd,
411 pw->pw_uid, pw->pw_gid, pw->pw_gecos, pw->pw_dir,
412 pw->pw_shell);
413 }
414
415#define FLAGS O_RDWR|O_CREAT
416
417 if ((dbp = yp_open_db_rw(domain, maps[i], FLAGS)) == NULL) {
418 yp_error("couldn't open %s/%s r/w: %s",domain,
419 maps[i],strerror(errno));
420 return(1);
421 }
422
423 data.data = pwbuf;
424 data.size = strlen(pwbuf);
425
426 if (yp_put_record(dbp, &key, &data, 1) != YP_TRUE) {
427 yp_error("failed to update record in %s/%s", domain,
428 maps[i]);
429 (void)(dbp->close)(dbp);
430 return(1);
431 }
432
433 key.data = yp_last;
434 key.size = strlen(yp_last);
435 data.data = (char *)&yplastbuf;
436 data.size = strlen(yplastbuf);
437
438 if (yp_put_record(dbp, &key, &data, 1) != YP_TRUE) {
439 yp_error("failed to update timestamp in %s/%s", domain,
440 maps[i]);
441 (void)(dbp->close)(dbp);
442 return(1);
443 }
444
445 (void)(dbp->close)(dbp);
446 }
447
448 return(0);
449}
450
451int *
452yppasswdproc_update_1_svc(yppasswd *argp, struct svc_req *rqstp)
453{
454 static int result;
455 struct sockaddr_in *rqhost;
456 DBT key, data;
457 int rval = 0;
458 int pfd, tfd;
459 int pid;
460 int passwd_changed = 0;
461 int shell_changed = 0;
462 int gecos_changed = 0;
|
| 463 char *cryptpw;
|
463 char *oldshell = NULL;
464 char *oldgecos = NULL;
465 char *passfile_hold;
466 char passfile_buf[MAXPATHLEN + 2];
467 char passfile_hold_buf[MAXPATHLEN + 2];
468 char *domain = yppasswd_domain;
469 static struct sockaddr_in clntaddr;
470 static struct timeval t_saved, t_test;
471
472 /*
473 * Normal user updates always use the 'default' master.passwd file.
474 */
475
476 passfile = passfile_default;
477 result = 1;
478
479 rqhost = svc_getcaller(rqstp->rq_xprt);
480
481 gettimeofday(&t_test, NULL);
482 if (!bcmp(rqhost, &clntaddr, sizeof *rqhost) &&
483 t_test.tv_sec > t_saved.tv_sec &&
484 t_test.tv_sec - t_saved.tv_sec < 300) {
485
486 bzero(&clntaddr, sizeof clntaddr);
487 bzero(&t_saved, sizeof t_saved);
488 return(NULL);
489 }
490
491 bcopy(rqhost, &clntaddr, sizeof clntaddr);
492 gettimeofday(&t_saved, NULL);
493
494 if (yp_access(resvport ? "master.passwd.byname" : NULL, rqstp)) {
495 yp_error("rejected update request from unauthorized host");
496 svcerr_auth(rqstp->rq_xprt, AUTH_BADCRED);
497 return(&result);
498 }
499
500 /*
501 * Step one: find the user. (It's kinda pointless to
502 * proceed if the user doesn't exist.) We look for the
503 * user in the master.passwd.byname database, _NOT_ by
504 * using getpwent() and friends! We can't use getpwent()
505 * since the NIS master server is not guaranteed to be
506 * configured as an NIS client.
507 */
508
509 if (multidomain) {
510 if ((domain = find_domain(&argp->newpw)) == NULL) {
511 yp_error("multidomain lookup failed - aborting update");
512 return(&result);
513 } else
514 yp_error("updating user %s in domain %s",
515 argp->newpw.pw_name, domain);
516 }
517
518 key.data = argp->newpw.pw_name;
519 key.size = strlen(argp->newpw.pw_name);
520
521 if ((rval = yp_get_record(domain,"master.passwd.byname",
522 &key, &data, 0)) != YP_TRUE) {
523 if (rval == YP_NOKEY) {
524 yp_error("user %s not found in passwd database",
525 argp->newpw.pw_name);
526 } else {
527 yp_error("database access error: %s",
528 yperr_string(rval));
529 }
530 return(&result);
531 }
532
533 /* Nul terminate, please. */
534 *((char *)data.data + data.size) = '\0';
535
536 copy_yp_pass(data.data, 1, data.size);
537
538 /* Step 2: check that the supplied oldpass is valid. */
539
| 464 char *oldshell = NULL;
465 char *oldgecos = NULL;
466 char *passfile_hold;
467 char passfile_buf[MAXPATHLEN + 2];
468 char passfile_hold_buf[MAXPATHLEN + 2];
469 char *domain = yppasswd_domain;
470 static struct sockaddr_in clntaddr;
471 static struct timeval t_saved, t_test;
472
473 /*
474 * Normal user updates always use the 'default' master.passwd file.
475 */
476
477 passfile = passfile_default;
478 result = 1;
479
480 rqhost = svc_getcaller(rqstp->rq_xprt);
481
482 gettimeofday(&t_test, NULL);
483 if (!bcmp(rqhost, &clntaddr, sizeof *rqhost) &&
484 t_test.tv_sec > t_saved.tv_sec &&
485 t_test.tv_sec - t_saved.tv_sec < 300) {
486
487 bzero(&clntaddr, sizeof clntaddr);
488 bzero(&t_saved, sizeof t_saved);
489 return(NULL);
490 }
491
492 bcopy(rqhost, &clntaddr, sizeof clntaddr);
493 gettimeofday(&t_saved, NULL);
494
495 if (yp_access(resvport ? "master.passwd.byname" : NULL, rqstp)) {
496 yp_error("rejected update request from unauthorized host");
497 svcerr_auth(rqstp->rq_xprt, AUTH_BADCRED);
498 return(&result);
499 }
500
501 /*
502 * Step one: find the user. (It's kinda pointless to
503 * proceed if the user doesn't exist.) We look for the
504 * user in the master.passwd.byname database, _NOT_ by
505 * using getpwent() and friends! We can't use getpwent()
506 * since the NIS master server is not guaranteed to be
507 * configured as an NIS client.
508 */
509
510 if (multidomain) {
511 if ((domain = find_domain(&argp->newpw)) == NULL) {
512 yp_error("multidomain lookup failed - aborting update");
513 return(&result);
514 } else
515 yp_error("updating user %s in domain %s",
516 argp->newpw.pw_name, domain);
517 }
518
519 key.data = argp->newpw.pw_name;
520 key.size = strlen(argp->newpw.pw_name);
521
522 if ((rval = yp_get_record(domain,"master.passwd.byname",
523 &key, &data, 0)) != YP_TRUE) {
524 if (rval == YP_NOKEY) {
525 yp_error("user %s not found in passwd database",
526 argp->newpw.pw_name);
527 } else {
528 yp_error("database access error: %s",
529 yperr_string(rval));
530 }
531 return(&result);
532 }
533
534 /* Nul terminate, please. */
535 *((char *)data.data + data.size) = '\0';
536
537 copy_yp_pass(data.data, 1, data.size);
538
539 /* Step 2: check that the supplied oldpass is valid. */
540
|
540 if (strcmp(crypt(argp->oldpass, yp_password.pw_passwd),
541 yp_password.pw_passwd)) {
| 541 cryptpw = crypt(argp->oldpass, yp_password.pw_passwd);
542 if (cryptpw == NULL || strcmp(cryptpw, yp_password.pw_passwd)) {
|
542 yp_error("rejected change attempt -- bad password");
543 yp_error("client address: %s username: %s",
544 inet_ntoa(rqhost->sin_addr),
545 argp->newpw.pw_name);
546 return(&result);
547 }
548
549 /* Step 3: validate the arguments passed to us by the client. */
550
551 if (validate(&yp_password, &argp->newpw)) {
552 yp_error("rejecting change attempt: bad arguments");
553 yp_error("client address: %s username: %s",
554 inet_ntoa(rqhost->sin_addr),
555 argp->newpw.pw_name);
556 svcerr_decode(rqstp->rq_xprt);
557 return(&result);
558 }
559
560 /* Step 4: update the user's passwd structure. */
561
562 if (!no_chsh && strcmp(argp->newpw.pw_shell, yp_password.pw_shell)) {
563 oldshell = yp_password.pw_shell;
564 yp_password.pw_shell = argp->newpw.pw_shell;
565 shell_changed++;
566 }
567
568
569 if (!no_chfn && strcmp(argp->newpw.pw_gecos, yp_password.pw_gecos)) {
570 oldgecos = yp_password.pw_gecos;
571 yp_password.pw_gecos = argp->newpw.pw_gecos;
572 gecos_changed++;
573 }
574
575 if (strcmp(argp->newpw.pw_passwd, yp_password.pw_passwd)) {
576 yp_password.pw_passwd = argp->newpw.pw_passwd;
577 yp_password.pw_change = 0;
578 passwd_changed++;
579 }
580
581 /*
582 * If the caller specified a domain other than our 'default'
583 * domain, change the path to master.passwd accordingly.
584 */
585
586 if (strcmp(domain, yppasswd_domain)) {
587 snprintf(passfile_buf, sizeof(passfile_buf),
588 "%s/%s/master.passwd", yp_dir, domain);
589 passfile = (char *)&passfile_buf;
590 }
591
592 /*
593 * Create a filename to hold the original master.passwd
594 * so if our call to yppwupdate fails we can roll back
595 */
596 snprintf(passfile_hold_buf, sizeof(passfile_hold_buf),
597 "%s.hold", passfile);
598 passfile_hold = (char *)&passfile_hold_buf;
599
600
601 /* Step 5: make a new password file with the updated info. */
602
603 if (pw_init(dirname(passfile), passfile)) {
604 yp_error("pw_init() failed");
605 return &result;
606 }
607 if ((pfd = pw_lock()) == -1) {
608 pw_fini();
609 yp_error("pw_lock() failed");
610 return &result;
611 }
612 if ((tfd = pw_tmp(-1)) == -1) {
613 pw_fini();
614 yp_error("pw_tmp() failed");
615 return &result;
616 }
617 if (pw_copy(pfd, tfd, &yp_password, NULL) == -1) {
618 pw_fini();
619 yp_error("pw_copy() failed");
620 return &result;
621 }
622 if (rename(passfile, passfile_hold) == -1) {
623 pw_fini();
624 yp_error("rename of %s to %s failed", passfile,
625 passfile_hold);
626 return &result;
627 }
628
629 if (strcmp(passfile, _PATH_MASTERPASSWD) == 0) {
630 /*
631 * NIS server is exporting the system's master.passwd.
632 * Call pw_mkdb to rebuild passwd and the .db files
633 */
634 if (pw_mkdb(yp_password.pw_name) == -1) {
635 pw_fini();
636 yp_error("pw_mkdb() failed");
637 rename(passfile_hold, passfile);
638 return &result;
639 }
640 } else {
641 /*
642 * NIS server is exporting a private master.passwd.
643 * Rename tempfile into final location
644 */
645 if (rename(pw_tempname(), passfile) == -1) {
646 pw_fini();
647 yp_error("rename of %s to %s failed",
648 pw_tempname(), passfile);
649 rename(passfile_hold, passfile);
650 return &result;
651 }
652 }
653
654 pw_fini();
655
656 if (inplace) {
657 if ((rval = update_inplace(&yp_password, domain))) {
658 yp_error("inplace update failed -- rebuilding maps");
659 }
660 }
661
662 switch ((pid = fork())) {
663 case 0:
664 if (inplace && !rval) {
665 execlp(MAP_UPDATE_PATH, MAP_UPDATE, passfile,
666 yppasswd_domain, "pushpw", (char *)NULL);
667 } else {
668 execlp(MAP_UPDATE_PATH, MAP_UPDATE, passfile,
669 yppasswd_domain, (char *)NULL);
670 }
671 yp_error("couldn't exec map update process: %s",
672 strerror(errno));
673 unlink(passfile);
674 rename(passfile_hold, passfile);
675 exit(1);
676 break;
677 case -1:
678 yp_error("fork() failed: %s", strerror(errno));
679 unlink(passfile);
680 rename(passfile_hold, passfile);
681 return(&result);
682 break;
683 default:
684 unlink(passfile_hold);
685 break;
686 }
687
688 if (verbose) {
689 yp_error("update completed for user %s (uid %d) in %s:",
690 argp->newpw.pw_name, argp->newpw.pw_uid, passfile);
691
692 if (passwd_changed)
693 yp_error("password changed");
694
695 if (gecos_changed)
696 yp_error("gecos changed ('%s' -> '%s')",
697 oldgecos, argp->newpw.pw_gecos);
698
699 if (shell_changed)
700 yp_error("shell changed ('%s' -> '%s')",
701 oldshell, argp->newpw.pw_shell);
702 }
703
704 result = 0;
705 return (&result);
706}
707
708/*
709 * Note that this function performs a little less sanity checking
710 * than the last one. Since only the superuser is allowed to use it,
711 * it is assumed that the caller knows what he's doing.
712 */
713int *
714yppasswdproc_update_master_1_svc(master_yppasswd *argp,
715 struct svc_req *rqstp)
716{
717 static int result;
718 int pfd, tfd;
719 int pid;
720 uid_t uid;
721 int rval = 0;
722 DBT key, data;
723 char *passfile_hold;
724 char passfile_buf[MAXPATHLEN + 2];
725 char passfile_hold_buf[MAXPATHLEN + 2];
726 struct sockaddr_in *rqhost;
727 SVCXPRT *transp;
728 struct passwd newpasswd;
729
730 result = 1;
731 transp = rqstp->rq_xprt;
732
733 /*
734 * NO AF_INET CONNETCIONS ALLOWED!
735 */
736 rqhost = svc_getcaller(transp);
737 if (rqhost->sin_family != AF_UNIX) {
738 yp_error("Alert! %s/%d attempted to use superuser-only \
739procedure!\n", inet_ntoa(rqhost->sin_addr), rqhost->sin_port);
740 svcerr_auth(transp, AUTH_BADCRED);
741 return(&result);
742 }
743
744 if (rqstp->rq_cred.oa_flavor != AUTH_SYS) {
745 yp_error("caller didn't send proper credentials");
746 svcerr_auth(transp, AUTH_BADCRED);
747 return(&result);
748 }
749
750 if (__rpc_get_local_uid(transp, &uid) < 0) {
751 yp_error("caller didn't send proper credentials");
752 svcerr_auth(transp, AUTH_BADCRED);
753 return(&result);
754 }
755
756 if (uid) {
757 yp_error("caller euid is %d, expecting 0 -- rejecting request",
758 uid);
759 svcerr_auth(rqstp->rq_xprt, AUTH_BADCRED);
760 return(&result);
761 }
762
763 passfile = passfile_default;
764
765 key.data = argp->newpw.pw_name;
766 key.size = strlen(argp->newpw.pw_name);
767
768 /*
769 * The superuser may add entries to the passwd maps if
770 * rpc.yppasswdd is started with the -a flag. Paranoia
771 * prevents me from allowing additions by default.
772 */
773 if ((rval = yp_get_record(argp->domain, "master.passwd.byname",
774 &key, &data, 0)) != YP_TRUE) {
775 if (rval == YP_NOKEY) {
776 yp_error("user %s not found in passwd database",
777 argp->newpw.pw_name);
778 if (allow_additions)
779 yp_error("notice: adding user %s to \
780master.passwd database for domain %s", argp->newpw.pw_name, argp->domain);
781 else
782 yp_error("restart rpc.yppasswdd with the -a flag to \
783allow additions to be made to the password database");
784 } else {
785 yp_error("database access error: %s",
786 yperr_string(rval));
787 }
788 if (!allow_additions)
789 return(&result);
790 } else {
791
792 /* Nul terminate, please. */
793 *((char *)data.data + data.size) = '\0';
794
795 copy_yp_pass(data.data, 1, data.size);
796 }
797
798 /*
799 * Perform a small bit of sanity checking.
800 */
801 if (validate_master(rval == YP_TRUE ? &yp_password:NULL,&argp->newpw)){
802 yp_error("rejecting update attempt for %s: bad arguments",
803 argp->newpw.pw_name);
804 return(&result);
805 }
806
807 /*
808 * If the caller specified a domain other than our 'default'
809 * domain, change the path to master.passwd accordingly.
810 */
811
812 if (strcmp(argp->domain, yppasswd_domain)) {
813 snprintf(passfile_buf, sizeof(passfile_buf),
814 "%s/%s/master.passwd", yp_dir, argp->domain);
815 passfile = (char *)&passfile_buf;
816 }
817
818 /*
819 * Create a filename to hold the original master.passwd
820 * so if our call to yppwupdate fails we can roll back
821 */
822 snprintf(passfile_hold_buf, sizeof(passfile_hold_buf),
823 "%s.hold", passfile);
824 passfile_hold = (char *)&passfile_hold_buf;
825
826 if (pw_init(dirname(passfile), passfile)) {
827 yp_error("pw_init() failed");
828 return &result;
829 }
830 if ((pfd = pw_lock()) == -1) {
831 pw_fini();
832 yp_error("pw_lock() failed");
833 return &result;
834 }
835 if ((tfd = pw_tmp(-1)) == -1) {
836 pw_fini();
837 yp_error("pw_tmp() failed");
838 return &result;
839 }
840 xlate_passwd(&argp->newpw, &newpasswd);
841 if (pw_copy(pfd, tfd, &newpasswd, NULL) == -1) {
842 pw_fini();
843 yp_error("pw_copy() failed");
844 return &result;
845 }
846 if (rename(passfile, passfile_hold) == -1) {
847 pw_fini();
848 yp_error("rename of %s to %s failed", passfile,
849 passfile_hold);
850 return &result;
851 }
852 if (strcmp(passfile, _PATH_MASTERPASSWD) == 0) {
853 /*
854 * NIS server is exporting the system's master.passwd.
855 * Call pw_mkdb to rebuild passwd and the .db files
856 */
857 if (pw_mkdb(argp->newpw.pw_name) == -1) {
858 pw_fini();
859 yp_error("pw_mkdb() failed");
860 rename(passfile_hold, passfile);
861 return &result;
862 }
863 } else {
864 /*
865 * NIS server is exporting a private master.passwd.
866 * Rename tempfile into final location
867 */
868 if (rename(pw_tempname(), passfile) == -1) {
869 pw_fini();
870 yp_error("rename of %s to %s failed",
871 pw_tempname(), passfile);
872 rename(passfile_hold, passfile);
873 return &result;
874 }
875 }
876 pw_fini();
877
878 if (inplace) {
879 xlate_passwd(&argp->newpw, &newpasswd);
880 if ((rval = update_inplace(&newpasswd, argp->domain))) {
881 yp_error("inplace update failed -- rebuilding maps");
882 }
883 }
884
885 switch ((pid = fork())) {
886 case 0:
887 if (inplace && !rval) {
888 execlp(MAP_UPDATE_PATH, MAP_UPDATE, passfile,
889 argp->domain, "pushpw", (char *)NULL);
890 } else {
891 execlp(MAP_UPDATE_PATH, MAP_UPDATE, passfile,
892 argp->domain, (char *)NULL);
893 }
894 yp_error("couldn't exec map update process: %s",
895 strerror(errno));
896 unlink(passfile);
897 rename(passfile_hold, passfile);
898 exit(1);
899 break;
900 case -1:
901 yp_error("fork() failed: %s", strerror(errno));
902 unlink(passfile);
903 rename(passfile_hold, passfile);
904 return(&result);
905 break;
906 default:
907 unlink(passfile_hold);
908 break;
909 }
910
911 yp_error("performed update of user %s (uid %d) domain %s",
912 argp->newpw.pw_name,
913 argp->newpw.pw_uid,
914 argp->domain);
915
916 result = 0;
917 return(&result);
918}
| 543 yp_error("rejected change attempt -- bad password");
544 yp_error("client address: %s username: %s",
545 inet_ntoa(rqhost->sin_addr),
546 argp->newpw.pw_name);
547 return(&result);
548 }
549
550 /* Step 3: validate the arguments passed to us by the client. */
551
552 if (validate(&yp_password, &argp->newpw)) {
553 yp_error("rejecting change attempt: bad arguments");
554 yp_error("client address: %s username: %s",
555 inet_ntoa(rqhost->sin_addr),
556 argp->newpw.pw_name);
557 svcerr_decode(rqstp->rq_xprt);
558 return(&result);
559 }
560
561 /* Step 4: update the user's passwd structure. */
562
563 if (!no_chsh && strcmp(argp->newpw.pw_shell, yp_password.pw_shell)) {
564 oldshell = yp_password.pw_shell;
565 yp_password.pw_shell = argp->newpw.pw_shell;
566 shell_changed++;
567 }
568
569
570 if (!no_chfn && strcmp(argp->newpw.pw_gecos, yp_password.pw_gecos)) {
571 oldgecos = yp_password.pw_gecos;
572 yp_password.pw_gecos = argp->newpw.pw_gecos;
573 gecos_changed++;
574 }
575
576 if (strcmp(argp->newpw.pw_passwd, yp_password.pw_passwd)) {
577 yp_password.pw_passwd = argp->newpw.pw_passwd;
578 yp_password.pw_change = 0;
579 passwd_changed++;
580 }
581
582 /*
583 * If the caller specified a domain other than our 'default'
584 * domain, change the path to master.passwd accordingly.
585 */
586
587 if (strcmp(domain, yppasswd_domain)) {
588 snprintf(passfile_buf, sizeof(passfile_buf),
589 "%s/%s/master.passwd", yp_dir, domain);
590 passfile = (char *)&passfile_buf;
591 }
592
593 /*
594 * Create a filename to hold the original master.passwd
595 * so if our call to yppwupdate fails we can roll back
596 */
597 snprintf(passfile_hold_buf, sizeof(passfile_hold_buf),
598 "%s.hold", passfile);
599 passfile_hold = (char *)&passfile_hold_buf;
600
601
602 /* Step 5: make a new password file with the updated info. */
603
604 if (pw_init(dirname(passfile), passfile)) {
605 yp_error("pw_init() failed");
606 return &result;
607 }
608 if ((pfd = pw_lock()) == -1) {
609 pw_fini();
610 yp_error("pw_lock() failed");
611 return &result;
612 }
613 if ((tfd = pw_tmp(-1)) == -1) {
614 pw_fini();
615 yp_error("pw_tmp() failed");
616 return &result;
617 }
618 if (pw_copy(pfd, tfd, &yp_password, NULL) == -1) {
619 pw_fini();
620 yp_error("pw_copy() failed");
621 return &result;
622 }
623 if (rename(passfile, passfile_hold) == -1) {
624 pw_fini();
625 yp_error("rename of %s to %s failed", passfile,
626 passfile_hold);
627 return &result;
628 }
629
630 if (strcmp(passfile, _PATH_MASTERPASSWD) == 0) {
631 /*
632 * NIS server is exporting the system's master.passwd.
633 * Call pw_mkdb to rebuild passwd and the .db files
634 */
635 if (pw_mkdb(yp_password.pw_name) == -1) {
636 pw_fini();
637 yp_error("pw_mkdb() failed");
638 rename(passfile_hold, passfile);
639 return &result;
640 }
641 } else {
642 /*
643 * NIS server is exporting a private master.passwd.
644 * Rename tempfile into final location
645 */
646 if (rename(pw_tempname(), passfile) == -1) {
647 pw_fini();
648 yp_error("rename of %s to %s failed",
649 pw_tempname(), passfile);
650 rename(passfile_hold, passfile);
651 return &result;
652 }
653 }
654
655 pw_fini();
656
657 if (inplace) {
658 if ((rval = update_inplace(&yp_password, domain))) {
659 yp_error("inplace update failed -- rebuilding maps");
660 }
661 }
662
663 switch ((pid = fork())) {
664 case 0:
665 if (inplace && !rval) {
666 execlp(MAP_UPDATE_PATH, MAP_UPDATE, passfile,
667 yppasswd_domain, "pushpw", (char *)NULL);
668 } else {
669 execlp(MAP_UPDATE_PATH, MAP_UPDATE, passfile,
670 yppasswd_domain, (char *)NULL);
671 }
672 yp_error("couldn't exec map update process: %s",
673 strerror(errno));
674 unlink(passfile);
675 rename(passfile_hold, passfile);
676 exit(1);
677 break;
678 case -1:
679 yp_error("fork() failed: %s", strerror(errno));
680 unlink(passfile);
681 rename(passfile_hold, passfile);
682 return(&result);
683 break;
684 default:
685 unlink(passfile_hold);
686 break;
687 }
688
689 if (verbose) {
690 yp_error("update completed for user %s (uid %d) in %s:",
691 argp->newpw.pw_name, argp->newpw.pw_uid, passfile);
692
693 if (passwd_changed)
694 yp_error("password changed");
695
696 if (gecos_changed)
697 yp_error("gecos changed ('%s' -> '%s')",
698 oldgecos, argp->newpw.pw_gecos);
699
700 if (shell_changed)
701 yp_error("shell changed ('%s' -> '%s')",
702 oldshell, argp->newpw.pw_shell);
703 }
704
705 result = 0;
706 return (&result);
707}
708
709/*
710 * Note that this function performs a little less sanity checking
711 * than the last one. Since only the superuser is allowed to use it,
712 * it is assumed that the caller knows what he's doing.
713 */
714int *
715yppasswdproc_update_master_1_svc(master_yppasswd *argp,
716 struct svc_req *rqstp)
717{
718 static int result;
719 int pfd, tfd;
720 int pid;
721 uid_t uid;
722 int rval = 0;
723 DBT key, data;
724 char *passfile_hold;
725 char passfile_buf[MAXPATHLEN + 2];
726 char passfile_hold_buf[MAXPATHLEN + 2];
727 struct sockaddr_in *rqhost;
728 SVCXPRT *transp;
729 struct passwd newpasswd;
730
731 result = 1;
732 transp = rqstp->rq_xprt;
733
734 /*
735 * NO AF_INET CONNETCIONS ALLOWED!
736 */
737 rqhost = svc_getcaller(transp);
738 if (rqhost->sin_family != AF_UNIX) {
739 yp_error("Alert! %s/%d attempted to use superuser-only \
740procedure!\n", inet_ntoa(rqhost->sin_addr), rqhost->sin_port);
741 svcerr_auth(transp, AUTH_BADCRED);
742 return(&result);
743 }
744
745 if (rqstp->rq_cred.oa_flavor != AUTH_SYS) {
746 yp_error("caller didn't send proper credentials");
747 svcerr_auth(transp, AUTH_BADCRED);
748 return(&result);
749 }
750
751 if (__rpc_get_local_uid(transp, &uid) < 0) {
752 yp_error("caller didn't send proper credentials");
753 svcerr_auth(transp, AUTH_BADCRED);
754 return(&result);
755 }
756
757 if (uid) {
758 yp_error("caller euid is %d, expecting 0 -- rejecting request",
759 uid);
760 svcerr_auth(rqstp->rq_xprt, AUTH_BADCRED);
761 return(&result);
762 }
763
764 passfile = passfile_default;
765
766 key.data = argp->newpw.pw_name;
767 key.size = strlen(argp->newpw.pw_name);
768
769 /*
770 * The superuser may add entries to the passwd maps if
771 * rpc.yppasswdd is started with the -a flag. Paranoia
772 * prevents me from allowing additions by default.
773 */
774 if ((rval = yp_get_record(argp->domain, "master.passwd.byname",
775 &key, &data, 0)) != YP_TRUE) {
776 if (rval == YP_NOKEY) {
777 yp_error("user %s not found in passwd database",
778 argp->newpw.pw_name);
779 if (allow_additions)
780 yp_error("notice: adding user %s to \
781master.passwd database for domain %s", argp->newpw.pw_name, argp->domain);
782 else
783 yp_error("restart rpc.yppasswdd with the -a flag to \
784allow additions to be made to the password database");
785 } else {
786 yp_error("database access error: %s",
787 yperr_string(rval));
788 }
789 if (!allow_additions)
790 return(&result);
791 } else {
792
793 /* Nul terminate, please. */
794 *((char *)data.data + data.size) = '\0';
795
796 copy_yp_pass(data.data, 1, data.size);
797 }
798
799 /*
800 * Perform a small bit of sanity checking.
801 */
802 if (validate_master(rval == YP_TRUE ? &yp_password:NULL,&argp->newpw)){
803 yp_error("rejecting update attempt for %s: bad arguments",
804 argp->newpw.pw_name);
805 return(&result);
806 }
807
808 /*
809 * If the caller specified a domain other than our 'default'
810 * domain, change the path to master.passwd accordingly.
811 */
812
813 if (strcmp(argp->domain, yppasswd_domain)) {
814 snprintf(passfile_buf, sizeof(passfile_buf),
815 "%s/%s/master.passwd", yp_dir, argp->domain);
816 passfile = (char *)&passfile_buf;
817 }
818
819 /*
820 * Create a filename to hold the original master.passwd
821 * so if our call to yppwupdate fails we can roll back
822 */
823 snprintf(passfile_hold_buf, sizeof(passfile_hold_buf),
824 "%s.hold", passfile);
825 passfile_hold = (char *)&passfile_hold_buf;
826
827 if (pw_init(dirname(passfile), passfile)) {
828 yp_error("pw_init() failed");
829 return &result;
830 }
831 if ((pfd = pw_lock()) == -1) {
832 pw_fini();
833 yp_error("pw_lock() failed");
834 return &result;
835 }
836 if ((tfd = pw_tmp(-1)) == -1) {
837 pw_fini();
838 yp_error("pw_tmp() failed");
839 return &result;
840 }
841 xlate_passwd(&argp->newpw, &newpasswd);
842 if (pw_copy(pfd, tfd, &newpasswd, NULL) == -1) {
843 pw_fini();
844 yp_error("pw_copy() failed");
845 return &result;
846 }
847 if (rename(passfile, passfile_hold) == -1) {
848 pw_fini();
849 yp_error("rename of %s to %s failed", passfile,
850 passfile_hold);
851 return &result;
852 }
853 if (strcmp(passfile, _PATH_MASTERPASSWD) == 0) {
854 /*
855 * NIS server is exporting the system's master.passwd.
856 * Call pw_mkdb to rebuild passwd and the .db files
857 */
858 if (pw_mkdb(argp->newpw.pw_name) == -1) {
859 pw_fini();
860 yp_error("pw_mkdb() failed");
861 rename(passfile_hold, passfile);
862 return &result;
863 }
864 } else {
865 /*
866 * NIS server is exporting a private master.passwd.
867 * Rename tempfile into final location
868 */
869 if (rename(pw_tempname(), passfile) == -1) {
870 pw_fini();
871 yp_error("rename of %s to %s failed",
872 pw_tempname(), passfile);
873 rename(passfile_hold, passfile);
874 return &result;
875 }
876 }
877 pw_fini();
878
879 if (inplace) {
880 xlate_passwd(&argp->newpw, &newpasswd);
881 if ((rval = update_inplace(&newpasswd, argp->domain))) {
882 yp_error("inplace update failed -- rebuilding maps");
883 }
884 }
885
886 switch ((pid = fork())) {
887 case 0:
888 if (inplace && !rval) {
889 execlp(MAP_UPDATE_PATH, MAP_UPDATE, passfile,
890 argp->domain, "pushpw", (char *)NULL);
891 } else {
892 execlp(MAP_UPDATE_PATH, MAP_UPDATE, passfile,
893 argp->domain, (char *)NULL);
894 }
895 yp_error("couldn't exec map update process: %s",
896 strerror(errno));
897 unlink(passfile);
898 rename(passfile_hold, passfile);
899 exit(1);
900 break;
901 case -1:
902 yp_error("fork() failed: %s", strerror(errno));
903 unlink(passfile);
904 rename(passfile_hold, passfile);
905 return(&result);
906 break;
907 default:
908 unlink(passfile_hold);
909 break;
910 }
911
912 yp_error("performed update of user %s (uid %d) domain %s",
913 argp->newpw.pw_name,
914 argp->newpw.pw_uid,
915 argp->domain);
916
917 result = 0;
918 return(&result);
919}
|