chpass.tproj/chpass.c

   1 /*
   2  * Copyright (c) 1999-2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*-
  24  * Copyright (c) 1988, 1993, 1994
  25  *      The Regents of the University of California.  All rights reserved.
  26  * Copyright (c) 2002 Networks Associates Technology, Inc.
  27  * All rights reserved.
  28  *
  29  * Portions of this software were developed for the FreeBSD Project by
  30  * ThinkSec AS and NAI Labs, the Security Research Division of Network
  31  * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
  32  * ("CBOSS"), as part of the DARPA CHATS research program.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  */
  62
  63 #if 0
  64 #if 0
  65 #ifndef lint
  66 static const char copyright[] =
  67 "@(#) Copyright (c) 1988, 1993, 1994\n\
  68         The Regents of the University of California.  All rights reserved.\n";
  69 #endif /* not lint */
  70
  71 #ifndef lint
  72 static char sccsid[] = "@(#)chpass.c    8.4 (Berkeley) 4/2/94";
  73 #endif /* not lint */
  74 #endif
  75 #include <sys/cdefs.h>
  76 __FBSDID("$FreeBSD: src/usr.bin/chpass/chpass.c,v 1.27.8.1 2006/09/29 06:13:20 marck Exp $");
  77 #endif
  78
  79 #include <sys/param.h>
  80 #include <sys/stat.h>
  81 #include <sys/signal.h>
  82 #include <sys/time.h>
  83 #include <sys/resource.h>
  84
  85 #include <err.h>
  86 #include <errno.h>
  87 #include <pwd.h>
  88 #include <stdio.h>
  89 #include <stdlib.h>
  90 #include <string.h>
  91 #include <unistd.h>
  92 #ifdef YP
  93 #include <ypclnt.h>
  94 #endif
  95
  96 #ifndef OPEN_DIRECTORY
  97 #include <pw_scan.h>
  98 #include <libutil.h>
  99 #endif
 100
 101 #include "chpass.h"
 102
 103 int master_mode;
 104
 105 #ifdef OPEN_DIRECTORY
 106 #include "open_directory.h"
 107 char *progname = NULL;
 108 CFStringRef DSPath = NULL;
 109 #endif /* OPEN_DIRECTORY */
 110
 111 static void     baduser(void);
 112 static void     usage(void);
 113
 114 int
 115 main(int argc, char *argv[])
 116 {
 117         enum { NEWSH, LOADENTRY, EDITENTRY, NEWPW, NEWEXP } op;
 118 #ifndef OPEN_DIRECTORY
 119         struct passwd lpw, *old_pw, *pw;
 120         int ch, pfd, tfd;
 121         const char *password;
 122 #else
 123         struct passwd *old_pw, *pw;
 124         int ch, tfd;
 125         char tfn[MAXPATHLEN];
 126 #endif
 127         char *arg = NULL;
 128         uid_t uid;
 129 #ifdef YP
 130         struct ypclnt *ypclnt;
 131         const char *yp_domain = NULL, *yp_host = NULL;
 132 #endif
 133 #ifdef OPEN_DIRECTORY
 134         CFStringRef username = NULL;
 135         CFStringRef authname = NULL;
 136         CFStringRef location = NULL;
 137
 138         progname = strrchr(argv[0], '/');
 139         if (progname) progname++;
 140         else progname = argv[0];
 141 #endif /* OPEN_DIRECTORY */
 142
 143         pw = old_pw = NULL;
 144         op = EDITENTRY;
 145 #ifdef OPEN_DIRECTORY
 146         while ((ch = getopt(argc, argv, "a:s:l:u:")) != -1)
 147 #else /* OPEN_DIRECTORY */
 148 #ifdef YP
 149         while ((ch = getopt(argc, argv, "a:p:s:e:d:h:loy")) != -1)
 150 #else
 151         while ((ch = getopt(argc, argv, "a:p:s:e:")) != -1)
 152 #endif
 153 #endif /* OPEN_DIRECTORY */
 154                 switch (ch) {
 155                 case 'a':
 156                         op = LOADENTRY;
 157                         arg = optarg;
 158                         break;
 159                 case 's':
 160                         op = NEWSH;
 161                         arg = optarg;
 162                         break;
 163 #ifndef OPEN_DIRECTORY
 164                 case 'p':
 165                         op = NEWPW;
 166                         arg = optarg;
 167                         break;
 168                 case 'e':
 169                         op = NEWEXP;
 170                         arg = optarg;
 171                         break;
 172 #ifdef YP
 173                 case 'd':
 174                         yp_domain = optarg;
 175                         break;
 176                 case 'h':
 177                         yp_host = optarg;
 178                         break;
 179                 case 'l':
 180                 case 'o':
 181                 case 'y':
 182                         /* compatibility */
 183                         break;
 184 #endif
 185 #else /* OPEN_DIRECTORY */
 186                 case 'l':
 187                         location = CFStringCreateWithCString(NULL, optarg, kCFStringEncodingUTF8);
 188                         break;
 189                 case 'u':
 190                         authname = CFStringCreateWithCString(NULL, optarg, kCFStringEncodingUTF8);
 191                         break;
 192 #endif
 193                 case '?':
 194                 default:
 195                         usage();
 196                 }
 197
 198         argc -= optind;
 199         argv += optind;
 200
 201         if (argc > 1)
 202                 usage();
 203
 204         uid = getuid();
 205
 206         if (op == EDITENTRY || op == NEWSH || op == NEWPW || op == NEWEXP) {
 207                 if (argc == 0) {
 208                         if ((pw = getpwuid(uid)) == NULL)
 209                                 errx(1, "unknown user: uid %lu",
 210                                     (unsigned long)uid);
 211                 } else {
 212                         if ((pw = getpwnam(*argv)) == NULL)
 213                                 errx(1, "unknown user: %s", *argv);
 214 #ifndef OPEN_DIRECTORY
 215                         if (uid != 0 && uid != pw->pw_uid)
 216                                 baduser();
 217 #endif
 218                 }
 219
 220 #ifndef OPEN_DIRECTORY
 221                 /* Make a copy for later verification */
 222                 if ((pw = pw_dup(pw)) == NULL ||
 223                     (old_pw = pw_dup(pw)) == NULL)
 224                         err(1, "pw_dup");
 225 #endif
 226         }
 227
 228 #if OPEN_DIRECTORY
 229         master_mode = (uid == 0);
 230
 231         /*
 232          * Find the user record and copy its details.
 233          */
 234         username = CFStringCreateWithCString(NULL, pw->pw_name, kCFStringEncodingUTF8);
 235
 236         if (strcmp(progname, "chsh") == 0 || op == NEWSH) {
 237                 cfprintf(stderr, "Changing shell for %@.\n", username);
 238         } else if (strcmp(progname, "chfn") == 0) {
 239                 cfprintf(stderr, "Changing finger information for %@.\n", username);
 240         } else if (strcmp(progname, "chpass") == 0) {
 241                 cfprintf(stderr, "Changing account information for %@.\n", username);
 242         }
 243
 244         /*
 245          * odGetUser updates DSPath global variable, performs authentication
 246          * if necessary, and extracts the attributes.
 247          */
 248         CFDictionaryRef attrs_orig = NULL;
 249         CFDictionaryRef attrs = NULL;
 250         ODRecordRef rec = odGetUser(location, authname, username, &attrs_orig);
 251
 252         if (!rec || !attrs_orig) exit(1);
 253 #endif /* OPEN_DIRECTORY */
 254
 255 #ifdef YP
 256         if (pw != NULL && (pw->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
 257                 ypclnt = ypclnt_new(yp_domain, "passwd.byname", yp_host);
 258                 master_mode = (ypclnt != NULL &&
 259                     ypclnt_connect(ypclnt) != -1 &&
 260                     ypclnt_havepasswdd(ypclnt) == 1);
 261                 ypclnt_free(ypclnt);
 262         } else
 263 #endif
 264         master_mode = (uid == 0);
 265
 266         if (op == NEWSH) {
 267                 /* protect p_shell -- it thinks NULL is /bin/sh */
 268                 if (!arg[0])
 269                         usage();
 270                 if (p_shell(arg, pw, (ENTRY *)NULL) == -1)
 271                         exit(1);
 272 #ifdef OPEN_DIRECTORY
 273                 else {
 274                         ENTRY* ep;
 275
 276                         setrestricted(attrs_orig);
 277
 278                         for (ep = list; ep->prompt; ep++) {
 279                                 if (strncasecmp(ep->prompt, "shell", ep->len) == 0) {
 280                                         if (!ep->restricted) {
 281                                                 CFStringRef shell = CFStringCreateWithCString(NULL, arg, kCFStringEncodingUTF8);
 282                                                 if (shell) {
 283                                                         attrs = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
 284                                                         if (attrs) CFDictionarySetValue((CFMutableDictionaryRef)attrs, kODAttributeTypeUserShell, shell);
 285                                                         CFRelease(shell);
 286                                                 }
 287                                         } else {
 288                                                 warnx("shell is restricted");
 289                                                 exit(1);
 290                                         }
 291                                 }
 292                         }
 293                 }
 294 #endif
 295         }
 296
 297 #ifndef OPEN_DIRECTORY
 298         if (op == NEWEXP) {
 299                 if (uid)        /* only root can change expire */
 300                         baduser();
 301                 if (p_expire(arg, pw, (ENTRY *)NULL) == -1)
 302                         exit(1);
 303         }
 304 #endif
 305
 306         if (op == LOADENTRY) {
 307                 if (uid)
 308                         baduser();
 309 #ifdef OPEN_DIRECTORY
 310                 warnx("-a is not supported for Open Directory.");
 311                 exit(1);
 312 #else
 313                 pw = &lpw;
 314                 old_pw = NULL;
 315                 if (!__pw_scan(arg, pw, _PWSCAN_WARN|_PWSCAN_MASTER))
 316                         exit(1);
 317 #endif /* OPEN_DIRECTORY */
 318         }
 319
 320 #ifndef OPEN_DIRECTORY
 321         if (op == NEWPW) {
 322                 if (uid)
 323                         baduser();
 324
 325                 if (strchr(arg, ':'))
 326                         errx(1, "invalid format for password");
 327                 pw->pw_passwd = arg;
 328         }
 329 #endif /* OPEN_DIRECTORY */
 330
 331         if (op == EDITENTRY) {
 332 #ifdef OPEN_DIRECTORY
 333                 setrestricted(attrs_orig);
 334                 snprintf(tfn, sizeof(tfn), "/etc/%s.XXXXXX", progname);
 335                 if ((tfd = mkstemp(tfn)) == -1)
 336                         err(1, "%s", tfn);
 337                 attrs = (CFMutableDictionaryRef)edit(tfn, attrs_orig);
 338                 (void)unlink(tfn);
 339 #else
 340                 /*
 341                  * We don't really need pw_*() here, but pw_edit() (used
 342                  * by edit()) is just too useful...
 343                  */
 344                 if (pw_init(NULL, NULL))
 345                         err(1, "pw_init()");
 346                 if ((tfd = pw_tmp(-1)) == -1) {
 347                         pw_fini();
 348                         err(1, "pw_tmp()");
 349                 }
 350                 free(pw);
 351                 pw = edit(pw_tempname(), old_pw);
 352                 pw_fini();
 353                 if (pw == NULL)
 354                         err(1, "edit()");
 355                 /*
 356                  * pw_equal does not check for crypted passwords, so we
 357                  * should do it explicitly
 358                  */
 359                 if (pw_equal(old_pw, pw) &&
 360                     strcmp(old_pw->pw_passwd, pw->pw_passwd) == 0)
 361                         errx(0, "user information unchanged");
 362 #endif /* OPEN_DIRECTORY */
 363         }
 364
 365 #ifndef OPEN_DIRECTORY
 366         if (old_pw && !master_mode) {
 367                 password = getpass("Password: ");
 368                 if (strcmp(crypt(password, old_pw->pw_passwd),
 369                     old_pw->pw_passwd) != 0)
 370                         baduser();
 371         } else {
 372                 password = "";
 373         }
 374 #endif
 375
 376 #ifdef OPEN_DIRECTORY
 377         odUpdateUser(rec, attrs_orig, attrs);
 378
 379         if (rec) CFRelease(rec);
 380
 381         exit(0);
 382         return 0;
 383 #else /* OPEN_DIRECTORY */
 384         exit(0);
 385         if (old_pw != NULL)
 386                 pw->pw_fields |= (old_pw->pw_fields & _PWF_SOURCE);
 387         switch (pw->pw_fields & _PWF_SOURCE) {
 388 #ifdef YP
 389         case _PWF_NIS:
 390                 ypclnt = ypclnt_new(yp_domain, "passwd.byname", yp_host);
 391                 if (ypclnt == NULL ||
 392                     ypclnt_connect(ypclnt) == -1 ||
 393                     ypclnt_passwd(ypclnt, pw, password) == -1) {
 394                         warnx("%s", ypclnt->error);
 395                         ypclnt_free(ypclnt);
 396                         exit(1);
 397                 }
 398                 ypclnt_free(ypclnt);
 399                 errx(0, "NIS user information updated");
 400 #endif /* YP */
 401         case 0:
 402         case _PWF_FILES:
 403                 if (pw_init(NULL, NULL))
 404                         err(1, "pw_init()");
 405                 if ((pfd = pw_lock()) == -1) {
 406                         pw_fini();
 407                         err(1, "pw_lock()");
 408                 }
 409                 if ((tfd = pw_tmp(-1)) == -1) {
 410                         pw_fini();
 411                         err(1, "pw_tmp()");
 412                 }
 413                 if (pw_copy(pfd, tfd, pw, old_pw) == -1) {
 414                         pw_fini();
 415                         err(1, "pw_copy");
 416                 }
 417                 if (pw_mkdb(pw->pw_name) == -1) {
 418                         pw_fini();
 419                         err(1, "pw_mkdb()");
 420                 }
 421                 pw_fini();
 422                 errx(0, "user information updated");
 423                 break;
 424         default:
 425                 errx(1, "unsupported passwd source");
 426         }
 427 #endif /* OPEN_DIRECTORY */
 428 }
 429
 430 static void
 431 baduser(void)
 432 {
 433
 434         errx(1, "%s", strerror(EACCES));
 435 }
 436
 437 static void
 438 usage(void)
 439 {
 440
 441         (void)fprintf(stderr,
 442             "usage: chpass%s %s [user]\n",
 443 #ifdef OPEN_DIRECTORY
 444                 "",
 445                 "[-l location] [-u authname] [-s shell]");
 446 #else /* OPEN_DIRECTORY */
 447 #ifdef YP
 448             " [-d domain] [-h host]",
 449 #else
 450             "",
 451 #endif
 452             "[-a list] [-p encpass] [-s shell] [-e mmm dd yy]");
 453 #endif /* OPEN_DIRECTORY */
 454         exit(1);
 455 }