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 66static 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 72static 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 103int master_mode; 104 105#ifdef OPEN_DIRECTORY 106#include "open_directory.h" 107char *progname = NULL; 108CFStringRef DSPath = NULL; 109#endif /* OPEN_DIRECTORY */ 110 111static void baduser(void); 112static void usage(void); 113 114int 115main(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 char *tmpdir; 127#endif 128 char *arg = NULL; 129 uid_t uid; 130#ifdef YP 131 struct ypclnt *ypclnt; 132 const char *yp_domain = NULL, *yp_host = NULL; 133#endif 134#ifdef OPEN_DIRECTORY 135 CFStringRef username = NULL; 136 CFStringRef authname = NULL; 137 CFStringRef location = NULL; 138 139 progname = strrchr(argv[0], '/'); 140 if (progname) progname++; 141 else progname = argv[0]; 142#endif /* OPEN_DIRECTORY */ 143 144 pw = old_pw = NULL; 145 op = EDITENTRY; 146#ifdef OPEN_DIRECTORY 147 while ((ch = getopt(argc, argv, "a:s:l:u:")) != -1) 148#else /* OPEN_DIRECTORY */ 149#ifdef YP 150 while ((ch = getopt(argc, argv, "a:p:s:e:d:h:loy")) != -1) 151#else 152 while ((ch = getopt(argc, argv, "a:p:s:e:")) != -1) 153#endif 154#endif /* OPEN_DIRECTORY */ 155 switch (ch) { 156 case 'a': 157 op = LOADENTRY; 158 arg = optarg; 159 break; 160 case 's': 161 op = NEWSH; 162 arg = optarg; 163 break; 164#ifndef OPEN_DIRECTORY 165 case 'p': 166 op = NEWPW; 167 arg = optarg; 168 break; 169 case 'e': 170 op = NEWEXP; 171 arg = optarg; 172 break; 173#ifdef YP 174 case 'd': 175 yp_domain = optarg; 176 break; 177 case 'h': 178 yp_host = optarg; 179 break; 180 case 'l': 181 case 'o': 182 case 'y': 183 /* compatibility */ 184 break; 185#endif 186#else /* OPEN_DIRECTORY */ 187 case 'l': 188 location = CFStringCreateWithCString(NULL, optarg, kCFStringEncodingUTF8); 189 break; 190 case 'u': 191 authname = CFStringCreateWithCString(NULL, optarg, kCFStringEncodingUTF8); 192 break; 193#endif 194 case '?': 195 default: 196 usage(); 197 } 198 199 argc -= optind; 200 argv += optind; 201 202 if (argc > 1) 203 usage(); 204 205 uid = getuid(); 206 207 if (op == EDITENTRY || op == NEWSH || op == NEWPW || op == NEWEXP) { 208 if (argc == 0) { 209 if ((pw = getpwuid(uid)) == NULL) 210 errx(1, "unknown user: uid %lu", 211 (unsigned long)uid); 212 } else { 213 if ((pw = getpwnam(*argv)) == NULL) 214 errx(1, "unknown user: %s", *argv); 215#ifndef OPEN_DIRECTORY 216 if (uid != 0 && uid != pw->pw_uid) 217 baduser(); 218#endif 219 } 220 221#ifndef OPEN_DIRECTORY 222 /* Make a copy for later verification */ 223 if ((pw = pw_dup(pw)) == NULL || 224 (old_pw = pw_dup(pw)) == NULL) 225 err(1, "pw_dup"); 226#endif 227 } 228 229#if OPEN_DIRECTORY 230 master_mode = (uid == 0); 231 232 /* 233 * Find the user record and copy its details. 234 */ 235 username = CFStringCreateWithCString(NULL, pw->pw_name, kCFStringEncodingUTF8); 236 237 if (strcmp(progname, "chsh") == 0 || op == NEWSH) { 238 cfprintf(stderr, "Changing shell for %@.\n", username); 239 } else if (strcmp(progname, "chfn") == 0) { 240 cfprintf(stderr, "Changing finger information for %@.\n", username); 241 } else if (strcmp(progname, "chpass") == 0) { 242 cfprintf(stderr, "Changing account information for %@.\n", username); 243 } 244 245 /* 246 * odGetUser updates DSPath global variable, performs authentication 247 * if necessary, and extracts the attributes. 248 */ 249 CFDictionaryRef attrs_orig = NULL; 250 CFDictionaryRef attrs = NULL; 251 ODRecordRef rec = odGetUser(location, authname, username, &attrs_orig); 252 253 if (!rec || !attrs_orig) exit(1); 254#endif /* OPEN_DIRECTORY */ 255 256#ifdef YP 257 if (pw != NULL && (pw->pw_fields & _PWF_SOURCE) == _PWF_NIS) { 258 ypclnt = ypclnt_new(yp_domain, "passwd.byname", yp_host); 259 master_mode = (ypclnt != NULL && 260 ypclnt_connect(ypclnt) != -1 && 261 ypclnt_havepasswdd(ypclnt) == 1); 262 ypclnt_free(ypclnt); 263 } else 264#endif 265 master_mode = (uid == 0); 266 267 if (op == NEWSH) { 268 /* protect p_shell -- it thinks NULL is /bin/sh */ 269 if (!arg[0]) 270 usage(); 271 if (p_shell(arg, pw, (ENTRY *)NULL) == -1) 272 exit(1); 273#ifdef OPEN_DIRECTORY 274 else { 275 ENTRY* ep; 276 277 setrestricted(attrs_orig); 278 279 for (ep = list; ep->prompt; ep++) { 280 if (strncasecmp(ep->prompt, "shell", ep->len) == 0) { 281 if (!ep->restricted) { 282 CFStringRef shell = CFStringCreateWithCString(NULL, arg, kCFStringEncodingUTF8); 283 if (shell) { 284 attrs = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); 285 if (attrs) CFDictionarySetValue((CFMutableDictionaryRef)attrs, kODAttributeTypeUserShell, shell); 286 CFRelease(shell); 287 } 288 } else { 289 warnx("shell is restricted"); 290 exit(1); 291 } 292 } 293 } 294 } 295#endif 296 } 297 298#ifndef OPEN_DIRECTORY 299 if (op == NEWEXP) { 300 if (uid) /* only root can change expire */ 301 baduser(); 302 if (p_expire(arg, pw, (ENTRY *)NULL) == -1) 303 exit(1); 304 } 305#endif 306 307 if (op == LOADENTRY) { 308 if (uid) 309 baduser(); 310#ifdef OPEN_DIRECTORY 311 warnx("-a is not supported for Open Directory."); 312 exit(1); 313#else 314 pw = &lpw; 315 old_pw = NULL; 316 if (!__pw_scan(arg, pw, _PWSCAN_WARN|_PWSCAN_MASTER)) 317 exit(1); 318#endif /* OPEN_DIRECTORY */ 319 } 320 321#ifndef OPEN_DIRECTORY 322 if (op == NEWPW) { 323 if (uid) 324 baduser(); 325 326 if (strchr(arg, ':')) 327 errx(1, "invalid format for password"); 328 pw->pw_passwd = arg; 329 } 330#endif /* OPEN_DIRECTORY */ 331 332 if (op == EDITENTRY) { 333#ifdef OPEN_DIRECTORY 334 setrestricted(attrs_orig); 335 tmpdir = getenv("TMPDIR"); 336 if (!tmpdir) 337 tmpdir = P_tmpdir; // defined in the system headers, defaults to /tmp 338 snprintf(tfn, sizeof(tfn), "%s/%s.XXXXXX", tmpdir, progname); 339 if ((tfd = mkstemp(tfn)) == -1) 340 err(1, "%s", tfn); 341 attrs = (CFMutableDictionaryRef)edit(tfn, attrs_orig); 342 (void)unlink(tfn); 343#else 344 /* 345 * We don't really need pw_*() here, but pw_edit() (used 346 * by edit()) is just too useful... 347 */ 348 if (pw_init(NULL, NULL)) 349 err(1, "pw_init()"); 350 if ((tfd = pw_tmp(-1)) == -1) { 351 pw_fini(); 352 err(1, "pw_tmp()"); 353 } 354 free(pw); 355 pw = edit(pw_tempname(), old_pw); 356 pw_fini(); 357 if (pw == NULL) 358 err(1, "edit()"); 359 /* 360 * pw_equal does not check for crypted passwords, so we 361 * should do it explicitly 362 */ 363 if (pw_equal(old_pw, pw) && 364 strcmp(old_pw->pw_passwd, pw->pw_passwd) == 0) 365 errx(0, "user information unchanged"); 366#endif /* OPEN_DIRECTORY */ 367 } 368 369#ifndef OPEN_DIRECTORY 370 if (old_pw && !master_mode) { 371 password = getpass("Password: "); 372 if (strcmp(crypt(password, old_pw->pw_passwd), 373 old_pw->pw_passwd) != 0) 374 baduser(); 375 } else { 376 password = ""; 377 } 378#endif 379 380#ifdef OPEN_DIRECTORY 381 odUpdateUser(rec, attrs_orig, attrs); 382 383 if (rec) CFRelease(rec); 384 385 exit(0); 386 return 0; 387#else /* OPEN_DIRECTORY */ 388 exit(0); 389 if (old_pw != NULL) 390 pw->pw_fields |= (old_pw->pw_fields & _PWF_SOURCE); 391 switch (pw->pw_fields & _PWF_SOURCE) { 392#ifdef YP 393 case _PWF_NIS: 394 ypclnt = ypclnt_new(yp_domain, "passwd.byname", yp_host); 395 if (ypclnt == NULL || 396 ypclnt_connect(ypclnt) == -1 || 397 ypclnt_passwd(ypclnt, pw, password) == -1) { 398 warnx("%s", ypclnt->error); 399 ypclnt_free(ypclnt); 400 exit(1); 401 } 402 ypclnt_free(ypclnt); 403 errx(0, "NIS user information updated"); 404#endif /* YP */ 405 case 0: 406 case _PWF_FILES: 407 if (pw_init(NULL, NULL)) 408 err(1, "pw_init()"); 409 if ((pfd = pw_lock()) == -1) { 410 pw_fini(); 411 err(1, "pw_lock()"); 412 } 413 if ((tfd = pw_tmp(-1)) == -1) { 414 pw_fini(); 415 err(1, "pw_tmp()"); 416 } 417 if (pw_copy(pfd, tfd, pw, old_pw) == -1) { 418 pw_fini(); 419 err(1, "pw_copy"); 420 } 421 if (pw_mkdb(pw->pw_name) == -1) { 422 pw_fini(); 423 err(1, "pw_mkdb()"); 424 } 425 pw_fini(); 426 errx(0, "user information updated"); 427 break; 428 default: 429 errx(1, "unsupported passwd source"); 430 } 431#endif /* OPEN_DIRECTORY */ 432} 433 434static void 435baduser(void) 436{ 437 438 errx(1, "%s", strerror(EACCES)); 439} 440 441static void 442usage(void) 443{ 444 445 (void)fprintf(stderr, 446 "usage: chpass%s %s [user]\n", 447#ifdef OPEN_DIRECTORY 448 "", 449 "[-l location] [-u authname] [-s shell]"); 450#else /* OPEN_DIRECTORY */ 451#ifdef YP 452 " [-d domain] [-h host]", 453#else 454 "", 455#endif 456 "[-a list] [-p encpass] [-s shell] [-e mmm dd yy]"); 457#endif /* OPEN_DIRECTORY */ 458 exit(1); 459} 460