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Changes to password generator: fallback to MD5 generator disabled
[pw-darwin.git] / pw / pw_user.c
1 /*-
2 * Copyright (C) 1996
3 * David L. Nugent. 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 *
14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $Id: pw_user.c,v 1.4 1996/12/17 01:43:30 davidn Exp $
27 */
28
29 #include <unistd.h>
30 #include <fcntl.h>
31 #include <ctype.h>
32 #include <paths.h>
33 #include <sys/param.h>
34 #include <dirent.h>
35 #include <termios.h>
36 #include <sys/types.h>
37 #include <sys/time.h>
38 #include <sys/resource.h>
39 #include <md5.h>
40 #include "pw.h"
41 #include "bitmap.h"
42 #include "pwupd.h"
43
44 static int print_user(struct passwd * pwd, int pretty);
45 static uid_t pw_uidpolicy(struct userconf * cnf, struct cargs * args);
46 static uid_t pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
47 static time_t pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
48 static time_t pw_exppolicy(struct userconf * cnf, struct cargs * args);
49 static char *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
50 static char *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
51 static char *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
52 static char *pw_checkname(char *name, int gecos);
53 static char *shell_path(char const * path, char *shells[], char *sh);
54 static void rmat(uid_t uid);
55
56 /*-
57 * -C config configuration file
58 * -q quiet operation
59 * -n name login name
60 * -u uid user id
61 * -c comment user name/comment
62 * -d directory home directory
63 * -e date account expiry date
64 * -p date password expiry date
65 * -g grp primary group
66 * -G grp1,grp2 additional groups
67 * -m [ -k dir ] create and set up home
68 * -s shell name of login shell
69 * -o duplicate uid ok
70 * -L class user class
71 * -l name new login name
72 * -h fd password filehandle
73 * -F force print or add
74 * Setting defaults:
75 * -D set user defaults
76 * -b dir default home root dir
77 * -e period default expiry period
78 * -p period default password change period
79 * -g group default group
80 * -G grp1,grp2.. default additional groups
81 * -L class default login class
82 * -k dir default home skeleton
83 * -s shell default shell
84 * -w method default password method
85 */
86
87 int
88 pw_user(struct userconf * cnf, int mode, struct cargs * args)
89 {
90 char *p = NULL;
91 struct carg *a_name;
92 struct carg *a_uid;
93 struct carg *arg;
94 struct passwd *pwd = NULL;
95 struct group *grp;
96 struct stat st;
97 char line[MAXPWLINE];
98
99 static struct passwd fakeuser =
100 {
101 NULL,
102 "*",
103 -1,
104 -1,
105 0,
106 "",
107 "User &",
108 "/bin/sh",
109 0,
110 0
111 };
112
113 /*
114 * With M_NEXT, we only need to return the
115 * next uid to stdout
116 */
117 if (mode == M_NEXT)
118 {
119 uid_t next = pw_uidpolicy(cnf, args);
120 if (getarg(args, 'q'))
121 return next;
122 printf("%ld:", (long)next);
123 pw_group(cnf, mode, args);
124 return EXIT_SUCCESS;
125 }
126
127 /*
128 * We can do all of the common legwork here
129 */
130
131 if ((arg = getarg(args, 'b')) != NULL) {
132 cnf->home = arg->val;
133 if (stat(cnf->home, &st) == -1 || !S_ISDIR(st.st_mode))
134 cmderr(EX_OSFILE, "root home `%s' is not a directory or does not exist\n", cnf->home);
135 }
136 if ((arg = getarg(args, 'e')) != NULL)
137 cnf->expire_days = atoi(arg->val);
138
139 if ((arg = getarg(args, 'p')) != NULL && arg->val)
140 cnf->password_days = atoi(arg->val);
141
142 if ((arg = getarg(args, 'g')) != NULL) {
143 p = arg->val;
144 if ((grp = getgrnam(p)) == NULL) {
145 if (!isdigit(*p) || (grp = getgrgid((gid_t) atoi(p))) == NULL)
146 cmderr(EX_NOUSER, "group `%s' does not exist\n", p);
147 }
148 cnf->default_group = newstr(grp->gr_name);
149 }
150 if ((arg = getarg(args, 'L')) != NULL)
151 cnf->default_class = pw_checkname(arg->val, 0);
152
153 if ((arg = getarg(args, 'G')) != NULL && arg->val) {
154 int i = 0;
155
156 for (p = strtok(arg->val, ", \t"); i < _UC_MAXGROUPS && p != NULL; p = strtok(NULL, ", \t")) {
157 if ((grp = getgrnam(p)) == NULL) {
158 if (!isdigit(*p) || (grp = getgrgid((gid_t) atoi(p))) == NULL)
159 cmderr(EX_NOUSER, "group `%s' does not exist\n", p);
160 }
161 cnf->groups[i++] = newstr(grp->gr_name);
162 }
163 while (i < _UC_MAXGROUPS)
164 cnf->groups[i++] = NULL;
165 }
166 if ((arg = getarg(args, 'k')) != NULL) {
167 if (stat(cnf->dotdir = arg->val, &st) == -1 || S_ISDIR(st.st_mode))
168 cmderr(EX_OSFILE, "skeleton `%s' is not a directory or does not exist\n", cnf->dotdir);
169 }
170 if ((arg = getarg(args, 's')) != NULL)
171 cnf->shell_default = arg->val;
172
173 if (mode == M_ADD && getarg(args, 'D')) {
174 if (getarg(args, 'n') != NULL)
175 cmderr(EX_DATAERR, "can't combine `-D' with `-n name'\n");
176 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
177 if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
178 cnf->min_uid = 1000;
179 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
180 cnf->max_uid = 32000;
181 }
182 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
183 if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
184 cnf->min_gid = 1000;
185 if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
186 cnf->max_gid = 32000;
187 }
188 if ((arg = getarg(args, 'w')) != NULL)
189 cnf->default_password = boolean_val(arg->val, cnf->default_password);
190
191 arg = getarg(args, 'C');
192 if (write_userconfig(arg ? arg->val : NULL))
193 return EXIT_SUCCESS;
194 perror("config update");
195 return EX_IOERR;
196 }
197 if (mode == M_PRINT && getarg(args, 'a')) {
198 int pretty = getarg(args, 'P') != NULL;
199
200 setpwent();
201 while ((pwd = getpwent()) != NULL)
202 print_user(pwd, pretty);
203 endpwent();
204 return EXIT_SUCCESS;
205 }
206 if ((a_name = getarg(args, 'n')) != NULL)
207 pwd = getpwnam(pw_checkname(a_name->val, 0));
208 a_uid = getarg(args, 'u');
209
210 if (a_uid == NULL) {
211 if (a_name == NULL)
212 cmderr(EX_DATAERR, "user name or id required\n");
213
214 /*
215 * Determine whether 'n' switch is name or uid - we don't
216 * really don't really care which we have, but we need to
217 * know.
218 */
219 if (mode != M_ADD && pwd == NULL && isdigit(*a_name->val) && atoi(a_name->val) > 0) { /* Assume uid */
220 (a_uid = a_name)->ch = 'u';
221 a_name = NULL;
222 }
223 }
224 /*
225 * Update, delete & print require that the user exists
226 */
227 if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) {
228 if (a_name == NULL && pwd == NULL) /* Try harder */
229 pwd = getpwuid(atoi(a_uid->val));
230
231 if (pwd == NULL) {
232 if (mode == M_PRINT && getarg(args, 'F')) {
233 fakeuser.pw_name = a_name ? a_name->val : "nouser";
234 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
235 return print_user(&fakeuser, getarg(args, 'P') != NULL);
236 }
237 if (a_name == NULL)
238 cmderr(EX_NOUSER, "no such uid `%s'\n", a_uid->val);
239 cmderr(EX_NOUSER, "no such user `%s'\n", a_name->val);
240 }
241 if (a_name == NULL) /* May be needed later */
242 a_name = addarg(args, 'n', newstr(pwd->pw_name));
243
244 /*
245 * Handle deletions now
246 */
247 if (mode == M_DELETE) {
248 char file[MAXPATHLEN];
249 char home[MAXPATHLEN];
250 uid_t uid = pwd->pw_uid;
251
252 if (strcmp(pwd->pw_name, "root") == 0)
253 cmderr(EX_DATAERR, "cannot remove user 'root'\n");
254
255 /*
256 * Remove crontabs
257 */
258 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name);
259 if (access(file, F_OK) == 0) {
260 sprintf(file, "crontab -u %s -r", pwd->pw_name);
261 system(file);
262 }
263 /*
264 * Save these for later, since contents of pwd may be
265 * invalidated by deletion
266 */
267 sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
268 strncpy(home, pwd->pw_dir, sizeof home);
269 home[sizeof home - 1] = '\0';
270
271 if (!delpwent(pwd))
272 cmderr(EX_IOERR, "Error updating passwd file: %s\n", strerror(errno));
273 editgroups(a_name->val, NULL);
274
275 pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
276
277 /*
278 * Remove mail file
279 */
280 remove(file);
281
282 /*
283 * Remove at jobs
284 */
285 if (getpwuid(uid) == NULL)
286 rmat(uid);
287
288 /*
289 * Remove home directory and contents
290 */
291 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
292 if (stat(home, &st) != -1) {
293 rm_r(home, uid);
294 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
295 a_name->val, (long) uid, home,
296 stat(home, &st) == -1 ? "" : "not completely ");
297 }
298 }
299 return EXIT_SUCCESS;
300 } else if (mode == M_PRINT)
301 return print_user(pwd, getarg(args, 'P') != NULL);
302
303 /*
304 * The rest is edit code
305 */
306 if ((arg = getarg(args, 'l')) != NULL) {
307 if (strcmp(pwd->pw_name, "root") == 0)
308 cmderr(EX_DATAERR, "can't rename `root' account\n");
309 pwd->pw_name = pw_checkname(arg->val, 0);
310 }
311 if ((arg = getarg(args, 'u')) != NULL && isdigit(*arg->val)) {
312 pwd->pw_uid = (uid_t) atol(arg->val);
313 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
314 cmderr(EX_DATAERR, "can't change uid of `root' account\n");
315 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
316 fprintf(stderr, "WARNING: account `%s' will have a uid of 0 (superuser access!)\n", pwd->pw_name);
317 }
318 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) /* Already checked this */
319 pwd->pw_gid = (gid_t) getgrnam(cnf->default_group)->gr_gid;
320
321 if ((arg = getarg(args, 'p')) != NULL) {
322 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0)
323 pwd->pw_change = 0;
324 else {
325 time_t now = time(NULL);
326 time_t expire = parse_date(now, arg->val);
327
328 if (now == expire)
329 cmderr(EX_DATAERR, "Invalid password change date `%s'\n", arg->val);
330 pwd->pw_change = expire;
331 }
332 }
333 if ((arg = getarg(args, 'e')) != NULL) {
334 if (*arg->val == '\0' || strcmp(arg->val, "0") == 0)
335 pwd->pw_expire = 0;
336 else {
337 time_t now = time(NULL);
338 time_t expire = parse_date(now, arg->val);
339
340 if (now == expire)
341 cmderr(EX_DATAERR, "Invalid account expiry date `%s'\n", arg->val);
342 pwd->pw_expire = expire;
343 }
344 }
345 if ((arg = getarg(args, 's')) != NULL)
346 pwd->pw_shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
347
348 if (getarg(args, 'L'))
349 pwd->pw_class = cnf->default_class;
350
351 if ((arg = getarg(args, 'w')) != NULL && getarg(args, 'h') == NULL)
352 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
353
354 } else {
355 if (a_name == NULL) /* Required */
356 cmderr(EX_DATAERR, "login name required\n");
357 else if ((pwd = getpwnam(a_name->val)) != NULL) /* Exists */
358 cmderr(EX_DATAERR, "login name `%s' already exists\n", a_name->val);
359
360 /*
361 * Now, set up defaults for a new user
362 */
363 pwd = &fakeuser;
364 pwd->pw_name = a_name->val;
365 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
366 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
367 pwd->pw_uid = pw_uidpolicy(cnf, args);
368 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
369 pwd->pw_change = pw_pwdpolicy(cnf, args);
370 pwd->pw_expire = pw_exppolicy(cnf, args);
371 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
372 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
373
374 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
375 fprintf(stderr, "WARNING: new account `%s' has a uid of 0 (superuser access!)\n", pwd->pw_name);
376 }
377
378 /*
379 * Shared add/edit code
380 */
381 if ((arg = getarg(args, 'c')) != NULL)
382 pwd->pw_gecos = pw_checkname(arg->val, 1);
383
384 if ((arg = getarg(args, 'h')) != NULL) {
385 if (strcmp(arg->val, "-") == 0)
386 pwd->pw_passwd = "*"; /* No access */
387 else {
388 int fd = atoi(arg->val);
389 int b;
390 int istty = isatty(fd);
391 struct termios t;
392
393 if (istty) {
394 if (tcgetattr(fd, &t) == -1)
395 istty = 0;
396 else {
397 struct termios n = t;
398
399 /* Disable echo */
400 n.c_lflag &= ~(ECHO);
401 tcsetattr(fd, TCSANOW, &n);
402 printf("%sassword for user %s:", (mode == M_UPDATE) ? "New p" : "P", pwd->pw_name);
403 fflush(stdout);
404 }
405 }
406 b = read(fd, line, sizeof(line) - 1);
407 if (istty) { /* Restore state */
408 tcsetattr(fd, TCSANOW, &t);
409 fputc('\n', stdout);
410 fflush(stdout);
411 }
412 if (b < 0) {
413 perror("-h file descriptor");
414 return EX_IOERR;
415 }
416 line[b] = '\0';
417 if ((p = strpbrk(line, " \t\r\n")) != NULL)
418 *p = '\0';
419 if (!*line)
420 cmderr(EX_DATAERR, "empty password read on file descriptor %d\n", fd);
421 pwd->pw_passwd = pw_pwcrypt(line);
422 }
423 }
424
425 /*
426 * Special case: -N only displays & exits
427 */
428 if (getarg(args, 'N') != NULL)
429 return print_user(pwd, getarg(args, 'P') != NULL);
430
431 if ((mode == M_ADD && !addpwent(pwd)) ||
432 (mode == M_UPDATE && !chgpwent(a_name->val, pwd))) {
433 perror("password update");
434 return EX_IOERR;
435 }
436 /*
437 * Ok, user is created or changed - now edit group file
438 */
439
440 if (mode == M_ADD || getarg(args, 'G') != NULL)
441 editgroups(pwd->pw_name, cnf->groups);
442
443 /* pwd may have been invalidated */
444 if ((pwd = getpwnam(a_name->val)) == NULL)
445 cmderr(EX_NOUSER, "user '%s' disappeared during update\n", a_name->val);
446
447 grp = getgrgid(pwd->pw_gid);
448 pw_log(cnf, mode, W_USER, "%s(%ld):%s(%d):%s:%s:%s",
449 pwd->pw_name, (long) pwd->pw_uid,
450 grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
451 pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
452
453 /*
454 * If adding, let's touch and chown the user's mail file. This is not
455 * strictly necessary under BSD with a 0755 maildir but it also
456 * doesn't hurt anything to create the empty mailfile
457 */
458 if (mode == M_ADD) {
459 FILE *fp;
460
461 sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
462 close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents &
463 * mtime */
464 chown(line, pwd->pw_uid, pwd->pw_gid);
465
466 /*
467 * Send mail to the new user as well, if we are asked to
468 */
469 if (cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
470 FILE *pfp = popen(_PATH_SENDMAIL " -t", "w");
471
472 if (pfp == NULL)
473 perror("sendmail");
474 else {
475 fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
476 while (fgets(line, sizeof(line), fp) != NULL) {
477 /* Do substitutions? */
478 fputs(line, pfp);
479 }
480 pclose(pfp);
481 pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
482 pwd->pw_name, (long) pwd->pw_uid);
483 }
484 fclose(fp);
485 }
486 }
487 /*
488 * Finally, let's create and populate the user's home directory. Note
489 * that this also `works' for editing users if -m is used, but
490 * existing files will *not* be overwritten.
491 */
492 if (getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
493 copymkdir(pwd->pw_dir, cnf->dotdir, 0755, pwd->pw_uid, pwd->pw_gid);
494 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
495 pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
496 }
497 return EXIT_SUCCESS;
498 }
499
500
501 static uid_t
502 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
503 {
504 struct passwd *pwd;
505 uid_t uid = (uid_t) - 1;
506 struct carg *a_uid = getarg(args, 'u');
507
508 /*
509 * Check the given uid, if any
510 */
511 if (a_uid != NULL) {
512 uid = (uid_t) atol(a_uid->val);
513
514 if ((pwd = getpwuid(uid)) != NULL && getarg(args, 'o') == NULL)
515 cmderr(EX_DATAERR, "uid `%ld' has already been allocated\n", (long) pwd->pw_uid);
516 } else {
517 struct bitmap bm;
518
519 /*
520 * We need to allocate the next available uid under one of
521 * two policies a) Grab the first unused uid b) Grab the
522 * highest possible unused uid
523 */
524 if (cnf->min_uid >= cnf->max_uid) { /* Sanity
525 * claus^H^H^H^Hheck */
526 cnf->min_uid = 1000;
527 cnf->max_uid = 32000;
528 }
529 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
530
531 /*
532 * Now, let's fill the bitmap from the password file
533 */
534 setpwent();
535 while ((pwd = getpwent()) != NULL)
536 if (pwd->pw_uid >= (int) cnf->min_uid && pwd->pw_uid <= (int) cnf->max_uid)
537 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
538 endpwent();
539
540 /*
541 * Then apply the policy, with fallback to reuse if necessary
542 */
543 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
544 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
545
546 /*
547 * Another sanity check
548 */
549 if (uid < cnf->min_uid || uid > cnf->max_uid)
550 cmderr(EX_SOFTWARE, "unable to allocate a new uid - range fully used\n");
551 bm_dealloc(&bm);
552 }
553 return uid;
554 }
555
556
557 static uid_t
558 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
559 {
560 struct group *grp;
561 gid_t gid = (uid_t) - 1;
562 struct carg *a_gid = getarg(args, 'g');
563
564 /*
565 * If no arg given, see if default can help out
566 */
567 if (a_gid == NULL && cnf->default_group && *cnf->default_group)
568 a_gid = addarg(args, 'g', cnf->default_group);
569
570 /*
571 * Check the given gid, if any
572 */
573 setgrent();
574 if (a_gid != NULL) {
575 if ((grp = getgrnam(a_gid->val)) == NULL) {
576 gid = (gid_t) atol(a_gid->val);
577 if ((gid == 0 && !isdigit(*a_gid->val)) || (grp = getgrgid(gid)) == NULL)
578 cmderr(EX_NOUSER, "group `%s' is not defined\n", a_gid->val);
579 }
580 gid = grp->gr_gid;
581 } else if ((grp = getgrnam(nam)) != NULL && grp->gr_mem[0] == NULL) {
582 gid = grp->gr_gid; /* Already created? Use it anyway... */
583 } else {
584 struct cargs grpargs;
585 char tmp[32];
586
587 LIST_INIT(&grpargs);
588 addarg(&grpargs, 'n', nam);
589
590 /*
591 * We need to auto-create a group with the user's name. We
592 * can send all the appropriate output to our sister routine
593 * bit first see if we can create a group with gid==uid so we
594 * can keep the user and group ids in sync. We purposely do
595 * NOT check the gid range if we can force the sync. If the
596 * user's name dups an existing group, then the group add
597 * function will happily handle that case for us and exit.
598 */
599 if (getgrgid(prefer) == NULL) {
600 sprintf(tmp, "%lu", (unsigned long) prefer);
601 addarg(&grpargs, 'g', tmp);
602 }
603 if (getarg(args, 'N'))
604 {
605 addarg(&grpargs, 'N', NULL);
606 addarg(&grpargs, 'q', NULL);
607 gid = pw_group(cnf, M_NEXT, &grpargs);
608 }
609 else
610 {
611 pw_group(cnf, M_ADD, &grpargs);
612 if ((grp = getgrnam(nam)) != NULL)
613 gid = grp->gr_gid;
614 }
615 a_gid = grpargs.lh_first;
616 while (a_gid != NULL) {
617 struct carg *t = a_gid->list.le_next;
618 LIST_REMOVE(a_gid, list);
619 a_gid = t;
620 }
621 }
622 endgrent();
623 return gid;
624 }
625
626
627 static time_t
628 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
629 {
630 time_t result = 0;
631 time_t now = time(NULL);
632 struct carg *arg = getarg(args, 'e');
633
634 if (arg != NULL) {
635 if ((result = parse_date(now, arg->val)) == now)
636 cmderr(EX_DATAERR, "invalid date/time `%s'\n", arg->val);
637 } else if (cnf->password_days > 0)
638 result = now + ((long) cnf->password_days * 86400L);
639 return result;
640 }
641
642
643 static time_t
644 pw_exppolicy(struct userconf * cnf, struct cargs * args)
645 {
646 time_t result = 0;
647 time_t now = time(NULL);
648 struct carg *arg = getarg(args, 'e');
649
650 if (arg != NULL) {
651 if ((result = parse_date(now, arg->val)) == now)
652 cmderr(EX_DATAERR, "invalid date/time `%s'\n", arg->val);
653 } else if (cnf->expire_days > 0)
654 result = now + ((long) cnf->expire_days * 86400L);
655 return result;
656 }
657
658
659 static char *
660 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
661 {
662 struct carg *arg = getarg(args, 'd');
663
664 if (arg)
665 return arg->val;
666 else {
667 static char home[128];
668
669 if (cnf->home == NULL || *cnf->home == '\0')
670 cmderr(EX_CONFIG, "no base home directory set\n");
671 sprintf(home, "%s/%s", cnf->home, user);
672 return home;
673 }
674 }
675
676 static char *
677 shell_path(char const * path, char *shells[], char *sh)
678 {
679 if (sh != NULL && (*sh == '/' || *sh == '\0'))
680 return sh; /* specified full path or forced none */
681 else {
682 char *p;
683 char paths[_UC_MAXLINE];
684
685 /*
686 * We need to search paths
687 */
688 strncpy(paths, path, sizeof paths);
689 paths[sizeof paths - 1] = '\0';
690 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
691 int i;
692 static char shellpath[256];
693
694 if (sh != NULL) {
695 sprintf(shellpath, "%s/%s", p, sh);
696 if (access(shellpath, X_OK) == 0)
697 return shellpath;
698 } else
699 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
700 sprintf(shellpath, "%s/%s", p, shells[i]);
701 if (access(shellpath, X_OK) == 0)
702 return shellpath;
703 }
704 }
705 if (sh == NULL)
706 cmderr(EX_OSFILE, "can't find shell `%s' in shell paths\n", sh);
707 cmderr(EX_CONFIG, "no default shell available or defined\n");
708 return NULL;
709 }
710 }
711
712
713 static char *
714 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
715 {
716 char *sh = newshell;
717 struct carg *arg = getarg(args, 's');
718
719 if (newshell == NULL && arg != NULL)
720 sh = arg->val;
721 return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
722 }
723
724 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.";
725
726 char *
727 pw_pwcrypt(char *password)
728 {
729 int i;
730 char salt[12];
731
732 static char buf[256];
733
734 /*
735 * Calculate a salt value
736 */
737 srandom((unsigned) (time(NULL) ^ getpid()));
738 for (i = 0; i < 8; i++)
739 salt[i] = chars[random() % 63];
740 salt[i] = '\0';
741
742 return strcpy(buf, crypt(password, salt));
743 }
744
745 #if defined(__FreeBSD__)
746
747 #if defined(USE_MD5RAND)
748 u_char *
749 pw_getrand(u_char *buf, int len) /* cryptographically secure rng */
750 {
751 int i;
752 for (i=0;i<len;i+=16) {
753 u_char ubuf[16];
754
755 MD5_CTX md5_ctx;
756 struct timeval tv, tvo;
757 struct rusage ru;
758 int n=0;
759 int t;
760
761 MD5Init (&md5_ctx);
762 t=getpid();
763 MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
764 t=getppid();
765 MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
766 gettimeofday (&tvo, NULL);
767 do {
768 getrusage (RUSAGE_SELF, &ru);
769 MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru);
770 gettimeofday (&tv, NULL);
771 MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv);
772 } while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000);
773 MD5Final (ubuf, &md5_ctx);
774 memcpy(buf+i, ubuf, MIN(16, len-n));
775 }
776 return buf;
777 }
778
779 #else /* Use random device (preferred) */
780
781 static u_char *
782 pw_getrand(u_char *buf, int len)
783 {
784 int fd;
785 fd = open("/dev/urandom", O_RDONLY);
786 if (fd==-1)
787 cmderr(EX_OSFILE, "can't open /dev/urandom: %s\n", strerror(errno));
788 else if (read(fd, buf, len)!=len)
789 cmderr(EX_IOERR, "read error on /dev/urandom\n");
790 close(fd);
791 return buf;
792 }
793
794 #endif
795
796 #else /* Portable version */
797
798 static u_char *
799 pw_getrand(u_char *buf, int len)
800 {
801 int i;
802
803 for (i = 0; i < len; i++) {
804 unsigned val = random();
805 /* Use all bits in the random value */
806 buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val);
807 }
808 return buf;
809 }
810
811 #endif
812
813 static char *
814 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
815 {
816 int i, l;
817 char pwbuf[32];
818 u_char rndbuf[sizeof pwbuf];
819
820 switch (cnf->default_password) {
821 case -1: /* Random password */
822 srandom((unsigned) (time(NULL) ^ getpid()));
823 l = (random() % 8 + 8); /* 8 - 16 chars */
824 pw_getrand(rndbuf, l);
825 for (i = 0; i < l; i++)
826 pwbuf[i] = chars[rndbuf[i] % sizeof(chars)];
827 pwbuf[i] = '\0';
828
829 /*
830 * We give this information back to the user
831 */
832 if (getarg(args, 'h') == NULL && getarg(args, 'N') == NULL) {
833 if (isatty(0))
834 printf("Password is: ");
835 printf("%s\n", pwbuf);
836 fflush(stdout);
837 }
838 break;
839
840 case -2: /* No password at all! */
841 return "";
842
843 case 0: /* No login - default */
844 default:
845 return "*";
846
847 case 1: /* user's name */
848 strncpy(pwbuf, user, sizeof pwbuf);
849 pwbuf[sizeof pwbuf - 1] = '\0';
850 break;
851 }
852 return pw_pwcrypt(pwbuf);
853 }
854
855
856 static int
857 print_user(struct passwd * pwd, int pretty)
858 {
859 if (!pretty) {
860 char buf[_UC_MAXLINE];
861
862 fmtpwent(buf, pwd);
863 fputs(buf, stdout);
864 } else {
865 int j;
866 char *p;
867 struct group *grp = getgrgid(pwd->pw_gid);
868 char uname[60] = "User &", office[60] = "[None]",
869 wphone[60] = "[None]", hphone[60] = "[None]";
870 char acexpire[32] = "[None]", pwexpire[32] = "[None]";
871 struct tm * tptr;
872
873 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
874 strncpy(uname, p, sizeof uname);
875 uname[sizeof uname - 1] = '\0';
876 if ((p = strtok(NULL, ",")) != NULL) {
877 strncpy(office, p, sizeof office);
878 office[sizeof office - 1] = '\0';
879 if ((p = strtok(NULL, ",")) != NULL) {
880 strncpy(wphone, p, sizeof wphone);
881 wphone[sizeof wphone - 1] = '\0';
882 if ((p = strtok(NULL, "")) != NULL) {
883 strncpy(hphone, p, sizeof hphone);
884 hphone[sizeof hphone - 1] = '\0';
885 }
886 }
887 }
888 }
889 /*
890 * Handle '&' in gecos field
891 */
892 if ((p = strchr(uname, '&')) != NULL) {
893 int l = strlen(pwd->pw_name);
894 int m = strlen(p);
895
896 memmove(p + l, p + 1, m);
897 memmove(p, pwd->pw_name, l);
898 *p = (char) toupper(*p);
899 }
900 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
901 strftime(acexpire, sizeof acexpire, "%c", tptr);
902 if (pwd->pw_change > (time_t)9 && (tptr = localtime(&pwd->pw_change)) != NULL)
903 strftime(pwexpire, sizeof pwexpire, "%c", tptr);
904 printf("Login Name : %-10s #%-22ld Group : %-10s #%ld\n"
905 " Full Name : %s\n"
906 " Home : %-32.32s Class : %s\n"
907 " Shell : %-32.32s Office : %s\n"
908 "Work Phone : %-32.32s Home Phone : %s\n"
909 "Acc Expire : %-32.32s Pwd Expire : %s\n",
910 pwd->pw_name, (long) pwd->pw_uid,
911 grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
912 uname, pwd->pw_dir, pwd->pw_class,
913 pwd->pw_shell, office, wphone, hphone,
914 acexpire, pwexpire);
915 setgrent();
916 j = 0;
917 while ((grp=getgrent()) != NULL)
918 {
919 int i = 0;
920 while (i < _UC_MAXGROUPS && grp->gr_mem[i] != NULL)
921 {
922 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
923 {
924 printf(j++ == 0 ? " Groups : %s" : ",%s", grp->gr_name);
925 break;
926 }
927 ++i;
928 }
929 }
930 endgrent();
931 printf("%s\n", j ? "\n" : "");
932 }
933 return EXIT_SUCCESS;
934 }
935
936 static char *
937 pw_checkname(char *name, int gecos)
938 {
939 int l = 0;
940 char const *notch = gecos ? ":" : " ,\t:+-&#%$^()!@~*?<>=|\\/\"";
941
942 while (name[l]) {
943 if (strchr(notch, name[l]) != NULL || name[l] < ' ' || name[l] > 126)
944 cmderr(EX_DATAERR, (name[l]<' ' || (unsigned char)name[l] > 126)
945 ? "invalid character `%c' in field\n"
946 : "invalid character 0x$02x in field\n",
947 name[l]);
948 ++l;
949 }
950 if (!gecos && l > MAXLOGNAME)
951 cmderr(EX_DATAERR, "name too long `%s'\n", name);
952 return name;
953 }
954
955
956 static void
957 rmat(uid_t uid)
958 {
959 DIR *d = opendir("/var/at/jobs");
960
961 if (d != NULL) {
962 struct dirent *e;
963
964 while ((e = readdir(d)) != NULL) {
965 struct stat st;
966
967 if (strncmp(e->d_name, ".lock", 5) != 0 &&
968 stat(e->d_name, &st) == 0 &&
969 !S_ISDIR(st.st_mode) &&
970 st.st_uid == uid) {
971 char tmp[MAXPATHLEN];
972
973 sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
974 system(tmp);
975 }
976 }
977 closedir(d);
978 }
979 }
A port of FreeBSDs pw for Darwin