1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/types.h> 29 #include <fcntl.h> 30 #include <errno.h> 31 #include <stdlib.h> 32 #include <sys/stat.h> 33 #include <pwd.h> 34 #include <shadow.h> 35 #include <string.h> 36 #include <strings.h> 37 #include <stdlib.h> 38 #include <unistd.h> 39 #include <nss_dbdefs.h> 40 #include <macros.h> 41 #include <syslog.h> 42 43 #include <limits.h> /* LOGNAME_MAX -- max Solaris user name */ 44 45 #include "passwdutil.h" 46 47 int files_lock(void); 48 int files_unlock(void); 49 int files_checkhistory(char *user, char *passwd, pwu_repository_t *rep); 50 int files_getattr(char *name, attrlist *item, pwu_repository_t *rep); 51 int files_getpwnam(char *name, attrlist *items, pwu_repository_t *rep, 52 void **buf); 53 int files_update(attrlist *items, pwu_repository_t *rep, void *buf); 54 int files_putpwnam(char *name, char *oldpw, char *dummy, 55 pwu_repository_t *rep, void *buf); 56 int files_user_to_authenticate(char *name, pwu_repository_t *rep, 57 char **auth_user, int *privileged); 58 59 static int files_update_history(char *name, struct spwd *spwd); 60 61 /* 62 * files function pointer table, used by passwdutil_init to initialize 63 * the global Repository-OPerations table "rops" 64 */ 65 struct repops files_repops = { 66 files_checkhistory, 67 files_getattr, 68 files_getpwnam, 69 files_update, 70 files_putpwnam, 71 files_user_to_authenticate, 72 files_lock, 73 files_unlock 74 }; 75 76 /* 77 * this structure defines the buffer used to keep state between 78 * get/update/put calls 79 */ 80 struct pwbuf { 81 int update_history; 82 struct passwd *pwd; 83 char *pwd_scratch; 84 struct spwd *spwd; 85 char *spwd_scratch; 86 char *new_sp_pwdp; 87 }; 88 89 /* 90 * We should use sysconf, but there is no sysconf name for SHADOW 91 * so we use these from nss_dbdefs 92 */ 93 #define PWD_SCRATCH_SIZE NSS_LINELEN_PASSWD 94 #define SPW_SCRATCH_SIZE NSS_LINELEN_SHADOW 95 96 /* 97 * lock functions for files repository 98 */ 99 int 100 files_lock(void) 101 { 102 int res; 103 104 if (lckpwdf()) { 105 switch (errno) { 106 case EINTR: 107 res = PWU_BUSY; 108 break; 109 case EACCES: 110 res = PWU_DENIED; 111 break; 112 case 0: 113 res = PWU_SUCCESS; 114 break; 115 } 116 } else 117 res = PWU_SUCCESS; 118 119 return (res); 120 } 121 122 int 123 files_unlock(void) 124 { 125 if (ulckpwdf()) 126 return (PWU_SYSTEM_ERROR); 127 128 return (PWU_SUCCESS); 129 } 130 131 /* 132 * files_privileged 133 * 134 * Are we a privileged user with regard to the files repository? 135 */ 136 int 137 files_privileged(void) 138 { 139 return (getuid() == 0); 140 } 141 142 /* 143 * 144 * private_getpwnam_r() 145 * 146 * A private implementation of getpwnam_r which does *not* fall back to 147 * other services possibly defined in nsswitch.conf 148 * 149 * behaves like getpwnam_r(). 150 */ 151 struct passwd * 152 private_getpwnam_r(const char *name, struct passwd *result, char *buffer, 153 int buflen) 154 { 155 FILE *fp; 156 int found; 157 158 if ((fp = fopen(PASSWD, "rF")) == NULL) 159 return (NULL); 160 161 found = 0; 162 while (!found && fgetpwent_r(fp, result, buffer, buflen) != NULL) { 163 if (strcmp(name, result->pw_name) == 0) 164 found = 1; 165 } 166 167 (void) fclose(fp); 168 169 if (!found) { 170 (void) memset(buffer, 0, buflen); 171 (void) memset(result, 0, sizeof (*result)); 172 return (NULL); 173 } 174 175 return (result); 176 } 177 178 /* 179 * private_getspnam_r() 180 * 181 * A private implementation of getspnam_r which does *not* fall back to 182 * other services possibly defined in nsswitch.conf. 183 * 184 * Behaves like getspnam_r(). Since we use fgetspent_t(), all numeric 185 * fields that are undefined in /etc/shadow will be set to -1. 186 * 187 */ 188 struct spwd * 189 private_getspnam_r(const char *name, struct spwd *result, char *buffer, 190 int buflen) 191 { 192 FILE *fp; 193 int found; 194 195 fp = fopen(SHADOW, "rF"); 196 if (fp == NULL) 197 return (NULL); 198 199 found = 0; 200 while (!found && fgetspent_r(fp, result, buffer, buflen) != NULL) { 201 if (strcmp(name, result->sp_namp) == 0) 202 found = 1; 203 } 204 205 (void) fclose(fp); 206 207 if (!found) { 208 (void) memset(buffer, 0, buflen); 209 (void) memset(result, 0, sizeof (*result)); 210 return (NULL); 211 } 212 return (result); 213 } 214 215 /* 216 * files_getpwnam(name, items, rep, buf) 217 * 218 */ 219 /*ARGSUSED*/ 220 int 221 files_getpwnam(char *name, attrlist *items, pwu_repository_t *rep, void **buf) 222 { 223 attrlist *p; 224 struct pwbuf *pwbuf; 225 int err = PWU_SUCCESS; 226 227 *buf = calloc(1, sizeof (struct pwbuf)); 228 pwbuf = (struct pwbuf *)*buf; 229 if (pwbuf == NULL) 230 return (PWU_NOMEM); 231 232 /* 233 * determine which password structure (/etc/passwd or /etc/shadow) 234 * we need for the items we need to update 235 */ 236 for (p = items; p != NULL; p = p->next) { 237 switch (p->type) { 238 case ATTR_NAME: 239 case ATTR_UID: 240 case ATTR_GID: 241 case ATTR_AGE: 242 case ATTR_COMMENT: 243 case ATTR_GECOS: 244 case ATTR_HOMEDIR: 245 case ATTR_SHELL: 246 if (pwbuf->pwd == NULL) { 247 pwbuf->pwd = malloc(sizeof (struct passwd)); 248 if (pwbuf->pwd == NULL) { 249 err = PWU_NOMEM; 250 goto error; 251 } 252 } 253 break; 254 case ATTR_PASSWD: 255 case ATTR_PASSWD_SERVER_POLICY: 256 case ATTR_LSTCHG: 257 case ATTR_MIN: 258 case ATTR_MAX: 259 case ATTR_WARN: 260 case ATTR_INACT: 261 case ATTR_EXPIRE: 262 case ATTR_FLAG: 263 case ATTR_LOCK_ACCOUNT: 264 case ATTR_EXPIRE_PASSWORD: 265 case ATTR_FAILED_LOGINS: 266 case ATTR_INCR_FAILED_LOGINS: 267 case ATTR_RST_FAILED_LOGINS: 268 case ATTR_NOLOGIN_ACCOUNT: 269 case ATTR_UNLOCK_ACCOUNT: 270 if (pwbuf->spwd == NULL) { 271 pwbuf->spwd = malloc(sizeof (struct spwd)); 272 if (pwbuf->spwd == NULL) { 273 err = PWU_NOMEM; 274 goto error; 275 } 276 } 277 break; 278 default: 279 /* 280 * Some other repository might have different values 281 * so we ignore those. 282 */ 283 break; 284 } 285 } 286 287 if (pwbuf->pwd) { 288 if ((pwbuf->pwd_scratch = malloc(PWD_SCRATCH_SIZE)) == NULL) { 289 err = PWU_NOMEM; 290 goto error; 291 } 292 if (private_getpwnam_r(name, pwbuf->pwd, pwbuf->pwd_scratch, 293 PWD_SCRATCH_SIZE) == NULL) { 294 err = PWU_NOT_FOUND; 295 goto error; 296 } 297 } 298 299 if (pwbuf->spwd) { 300 if ((pwbuf->spwd_scratch = malloc(SPW_SCRATCH_SIZE)) == NULL) { 301 err = PWU_NOMEM; 302 goto error; 303 } 304 if (private_getspnam_r(name, pwbuf->spwd, pwbuf->spwd_scratch, 305 SPW_SCRATCH_SIZE) == NULL) { 306 err = PWU_NOT_FOUND; 307 goto error; 308 } 309 } 310 311 return (PWU_SUCCESS); 312 error: 313 if (pwbuf->pwd) free(pwbuf->pwd); 314 if (pwbuf->pwd_scratch) free(pwbuf->pwd_scratch); 315 if (pwbuf->spwd) free(pwbuf->spwd); 316 if (pwbuf->spwd_scratch) free(pwbuf->spwd_scratch); 317 free(pwbuf); 318 *buf = NULL; 319 320 return (err); 321 } 322 323 /* 324 * int files_user_to_authenticate(name, rep, auth_user, privileged) 325 * Determine which user needs to be authenticated. For files, the 326 * possible return values are: 327 * PWU_NOT_FOUND 328 * PWU_SUCCESS and (auth_user == NULL || auth_user = user) 329 * PWU_DENIED 330 */ 331 /*ARGSUSED*/ 332 int 333 files_user_to_authenticate(char *user, pwu_repository_t *rep, 334 char **auth_user, int *privileged) 335 { 336 struct pwbuf *pwbuf; 337 int res; 338 attrlist attr_tmp[1] = { { ATTR_UID, NULL, NULL } }; 339 340 /* check to see if target user is present in files */ 341 res = files_getpwnam(user, &attr_tmp[0], rep, (void **)&pwbuf); 342 if (res != PWU_SUCCESS) 343 return (res); 344 345 if (files_privileged()) { 346 *auth_user = NULL; 347 *privileged = 1; 348 res = PWU_SUCCESS; 349 } else { 350 *privileged = 0; 351 if (getuid() == pwbuf->pwd->pw_uid) { 352 *auth_user = strdup(user); 353 res = PWU_SUCCESS; 354 } else { 355 res = PWU_DENIED; 356 } 357 } 358 359 if (pwbuf->pwd) free(pwbuf->pwd); 360 if (pwbuf->pwd_scratch) free(pwbuf->pwd_scratch); 361 if (pwbuf->spwd) free(pwbuf->spwd); 362 if (pwbuf->spwd_scratch) free(pwbuf->spwd_scratch); 363 free(pwbuf); 364 365 return (res); 366 } 367 368 /* 369 * Password history file format: 370 * user:crypw1: ... crypwn: such that n <= MAXHISTORY 371 */ 372 #define HISTORY "/etc/security/passhistory" 373 #define HISTEMP "/etc/security/pwhistemp" 374 #define OHISTORY "/etc/security/opwhistory" 375 #define HISTMODE S_IRUSR /* mode to create history file */ 376 /* 377 * XXX 378 * 3*LOGNAME_MAX just in case there are long user names. 379 * Traditionally Solaris LOGNAME_MAX (_POSIX_LOGIN_NAME_MAX) is 13, 380 * but some sites often user more. 381 * If LOGNAME_MAX ever becomes reasonable (128) and actually enforced, 382 * fix up here. 383 * XXX 384 */ 385 #define MAX_LOGNAME (3 * LOGNAME_MAX) 386 387 /* 388 * files_checkhistory - check if a user's new password is in the user's 389 * old password history. 390 * 391 * Entry 392 * user = username. 393 * passwd = new clear text password. 394 * 395 * Exit 396 * PWU_SUCCESS, passwd found in user's old password history. 397 * The caller should only be interested and fail if 398 * PWU_SUCCESS is returned. 399 * PWU_NOT_FOUND, passwd not in user's old password history. 400 * PWU_errors, PWU_ errors from other routines. 401 * 402 */ 403 int 404 files_checkhistory(char *user, char *passwd, pwu_repository_t *rep) 405 { 406 attrlist attr; 407 int res; 408 409 attr.type = ATTR_HISTORY; 410 attr.data.val_s = NULL; 411 attr.next = NULL; 412 413 debug("files_checkhistory(user=%s)", user); 414 415 /* 416 * XXX 417 * This depends on the underlying files_getattr implementation 418 * treating user not found in backing store or no history as 419 * an error. 420 * XXX 421 */ 422 423 if ((res = files_getattr(user, &attr, rep)) == PWU_SUCCESS) { 424 char *s; 425 char *crypt_passwd; 426 int histsize; 427 char *last = attr.data.val_s; 428 429 if ((histsize = def_getint("HISTORY=", DEFHISTORY)) == 0) { 430 debug("files_checkhistory: no history requested"); 431 res = PWU_NOT_FOUND; 432 goto out; 433 } 434 435 debug("files_checkhistory: histsize = %d", histsize); 436 if (histsize > MAXHISTORY) 437 histsize = MAXHISTORY; 438 439 debug("line to test\n\t%s", last); 440 441 /* compare crypt_passwd to attr.data.val_s strings. */ 442 res = PWU_NOT_FOUND; 443 while ((histsize-- > 0) && 444 (((s = strtok_r(NULL, ":", &last)) != NULL) && 445 (*s != '\n'))) { 446 447 crypt_passwd = crypt(passwd, s); 448 debug("files_checkhistory: user_pw=%s, history_pw=%s", 449 crypt_passwd, s); 450 if (strcmp(crypt_passwd, s) == 0) { 451 res = PWU_SUCCESS; 452 break; 453 } 454 } 455 debug("files_checkhistory(%s, %s) = %d", user, crypt_passwd, 456 res); 457 } 458 out: 459 if (attr.data.val_s != NULL) 460 free(attr.data.val_s); 461 462 return (res); 463 } 464 465 /* 466 * files_getattr(name, items, rep) 467 * 468 * Get attributes specified in list 'items' 469 */ 470 int 471 files_getattr(char *name, attrlist *items, pwu_repository_t *rep) 472 { 473 struct pwbuf *pwbuf; 474 struct passwd *pw; 475 struct spwd *spw; 476 attrlist *w; 477 int res; 478 479 res = files_getpwnam(name, items, rep, (void **)&pwbuf); 480 if (res != PWU_SUCCESS) 481 return (res); 482 483 pw = pwbuf->pwd; 484 spw = pwbuf->spwd; 485 486 for (w = items; res == PWU_SUCCESS && w != NULL; w = w->next) { 487 switch (w->type) { 488 case ATTR_NAME: 489 if ((w->data.val_s = strdup(pw->pw_name)) == NULL) 490 res = PWU_NOMEM; 491 break; 492 case ATTR_COMMENT: 493 if ((w->data.val_s = strdup(pw->pw_comment)) == NULL) 494 res = PWU_NOMEM; 495 break; 496 case ATTR_GECOS: 497 if ((w->data.val_s = strdup(pw->pw_gecos)) == NULL) 498 res = PWU_NOMEM; 499 break; 500 case ATTR_HOMEDIR: 501 if ((w->data.val_s = strdup(pw->pw_dir)) == NULL) 502 res = PWU_NOMEM; 503 break; 504 case ATTR_SHELL: 505 if ((w->data.val_s = strdup(pw->pw_shell)) == NULL) 506 res = PWU_NOMEM; 507 break; 508 /* 509 * Nothing special needs to be done for 510 * server policy 511 */ 512 case ATTR_PASSWD: 513 case ATTR_PASSWD_SERVER_POLICY: 514 if ((w->data.val_s = strdup(spw->sp_pwdp)) == NULL) 515 res = PWU_NOMEM; 516 break; 517 case ATTR_AGE: 518 if ((w->data.val_s = strdup(pw->pw_age)) == NULL) 519 res = PWU_NOMEM; 520 break; 521 case ATTR_REP_NAME: 522 if ((w->data.val_s = strdup("files")) == NULL) 523 res = PWU_NOMEM; 524 break; 525 case ATTR_HISTORY: { 526 FILE *history; 527 char buf[MAX_LOGNAME + MAXHISTORY + 528 (MAXHISTORY * CRYPT_MAXCIPHERTEXTLEN)+1]; 529 char *s, *s1; 530 531 debug("files_getattr: Get password history for %s ", 532 name); 533 534 if ((history = fopen(HISTORY, "rF")) == NULL) { 535 debug("files_getattr: %s not found", HISTORY); 536 res = PWU_OPEN_FAILED; 537 goto getattr_exit; 538 } 539 res = PWU_NOT_FOUND; 540 while ((s = fgets(buf, sizeof (buf), history)) != 541 NULL) { 542 s1 = strchr(s, ':'); 543 if (s1 != NULL) { 544 *s1 = '\0'; 545 } else { 546 res = PWU_NOT_FOUND; 547 break; 548 } 549 #ifdef DEBUG 550 debug("got history line for %s", s); 551 #endif /* DEBUG */ 552 if (strcmp(s, name) == 0) { 553 /* found user */ 554 if ((items->data.val_s = 555 strdup(s1+1)) == NULL) 556 res = PWU_NOMEM; 557 else 558 res = PWU_SUCCESS; 559 break; 560 } 561 } 562 (void) fclose(history); 563 break; 564 } 565 566 /* integer values */ 567 case ATTR_UID: 568 w->data.val_i = pw->pw_uid; 569 break; 570 case ATTR_GID: 571 w->data.val_i = pw->pw_gid; 572 break; 573 case ATTR_LSTCHG: 574 w->data.val_i = spw->sp_lstchg; 575 break; 576 case ATTR_MIN: 577 w->data.val_i = spw->sp_min; 578 break; 579 case ATTR_MAX: 580 w->data.val_i = spw->sp_max; 581 break; 582 case ATTR_WARN: 583 w->data.val_i = spw->sp_warn; 584 break; 585 case ATTR_INACT: 586 w->data.val_i = spw->sp_inact; 587 break; 588 case ATTR_EXPIRE: 589 w->data.val_i = spw->sp_expire; 590 break; 591 case ATTR_FLAG: 592 w->data.val_i = spw->sp_flag; 593 break; 594 case ATTR_FAILED_LOGINS: 595 w->data.val_i = spw->sp_flag & FAILCOUNT_MASK; 596 break; 597 default: 598 break; 599 } 600 } 601 602 getattr_exit: 603 if (pwbuf->pwd) free(pwbuf->pwd); 604 if (pwbuf->pwd_scratch) free(pwbuf->pwd_scratch); 605 if (pwbuf->spwd) free(pwbuf->spwd); 606 if (pwbuf->spwd_scratch) free(pwbuf->spwd_scratch); 607 free(pwbuf); 608 609 return (res); 610 } 611 612 /* 613 * max_present(list) 614 * 615 * see if attribute ATTR_MAX, with value != -1, is present in 616 * attribute-list "list". 617 * 618 * returns 1 if present, 0 otherwise. 619 */ 620 static int 621 max_present(attrlist *list) 622 { 623 while (list != NULL) 624 if (list->type == ATTR_MAX && list->data.val_i != -1) 625 return (1); 626 else 627 list = list->next; 628 629 return (0); 630 } 631 632 /* 633 * files_update(items, rep, buf) 634 * 635 * update the information in buf with the attributes specified in 636 * items. 637 */ 638 /*ARGSUSED*/ 639 int 640 files_update(attrlist *items, pwu_repository_t *rep, void *buf) 641 { 642 struct pwbuf *pwbuf = (struct pwbuf *)buf; 643 struct passwd *pw; 644 struct spwd *spw; 645 attrlist *p; 646 int aging_needed = 0; 647 int aging_set = 0; 648 int disable_aging; 649 char *pword; 650 int len; 651 652 pw = pwbuf->pwd; 653 spw = pwbuf->spwd; 654 pwbuf->update_history = 0; 655 656 /* 657 * if sp_max==0 : disable passwd aging after updating the password 658 */ 659 disable_aging = (spw != NULL && spw->sp_max == 0); 660 661 for (p = items; p != NULL; p = p->next) { 662 switch (p->type) { 663 case ATTR_NAME: 664 break; /* We are able to handle this, but... */ 665 case ATTR_UID: 666 pw->pw_uid = (uid_t)p->data.val_i; 667 break; 668 case ATTR_GID: 669 pw->pw_gid = (gid_t)p->data.val_i; 670 break; 671 case ATTR_AGE: 672 pw->pw_age = p->data.val_s; 673 break; 674 case ATTR_COMMENT: 675 pw->pw_comment = p->data.val_s; 676 break; 677 case ATTR_GECOS: 678 pw->pw_gecos = p->data.val_s; 679 break; 680 case ATTR_HOMEDIR: 681 pw->pw_dir = p->data.val_s; 682 break; 683 case ATTR_SHELL: 684 pw->pw_shell = p->data.val_s; 685 break; 686 687 /* 688 * Nothing special needs to be done for 689 * server policy 690 */ 691 case ATTR_PASSWD: 692 case ATTR_PASSWD_SERVER_POLICY: 693 /* 694 * There is a special case only for files: if the 695 * password is to be deleted (-d to passwd), 696 * p->data.val_s will be NULL. 697 */ 698 if (p->data.val_s == NULL) { 699 spw->sp_pwdp = ""; 700 } else { 701 char *salt = NULL; 702 char *hash = NULL; 703 704 salt = crypt_gensalt(spw->sp_pwdp, pw); 705 706 if (salt == NULL) { 707 if (errno == ENOMEM) 708 return (PWU_NOMEM); 709 /* algorithm problem? */ 710 syslog(LOG_AUTH | LOG_ALERT, 711 "passwdutil: crypt_gensalt %m"); 712 return (PWU_UPDATE_FAILED); 713 } 714 hash = crypt(p->data.val_s, salt); 715 free(salt); 716 if (hash == NULL) { 717 errno = ENOMEM; 718 return (PWU_NOMEM); 719 } 720 pword = strdup(hash); 721 if (pword == NULL) { 722 errno = ENOMEM; 723 return (PWU_NOMEM); 724 } 725 726 if (pwbuf->new_sp_pwdp) 727 free(pwbuf->new_sp_pwdp); 728 pwbuf->new_sp_pwdp = pword; 729 spw->sp_pwdp = pword; 730 aging_needed = 1; 731 pwbuf->update_history = 1; 732 } 733 spw->sp_flag &= ~FAILCOUNT_MASK; /* reset count */ 734 spw->sp_lstchg = DAY_NOW_32; 735 break; 736 case ATTR_LOCK_ACCOUNT: 737 if (spw->sp_pwdp == NULL) { 738 spw->sp_pwdp = LOCKSTRING; 739 } else if (strncmp(spw->sp_pwdp, LOCKSTRING, 740 sizeof (LOCKSTRING)-1) != 0) { 741 len = sizeof (LOCKSTRING)-1 + 742 strlen(spw->sp_pwdp) + 1; 743 pword = malloc(len); 744 if (pword == NULL) { 745 errno = ENOMEM; 746 return (PWU_NOMEM); 747 } 748 (void) strlcpy(pword, LOCKSTRING, len); 749 (void) strlcat(pword, spw->sp_pwdp, len); 750 if (pwbuf->new_sp_pwdp) 751 free(pwbuf->new_sp_pwdp); 752 pwbuf->new_sp_pwdp = pword; 753 spw->sp_pwdp = pword; 754 } 755 spw->sp_lstchg = DAY_NOW_32; 756 break; 757 case ATTR_UNLOCK_ACCOUNT: 758 if (spw->sp_pwdp != NULL && 759 strncmp(spw->sp_pwdp, LOCKSTRING, 760 sizeof (LOCKSTRING)-1) == 0) { 761 (void) strcpy(spw->sp_pwdp, spw->sp_pwdp + 762 sizeof (LOCKSTRING)-1); 763 } 764 spw->sp_lstchg = DAY_NOW_32; 765 break; 766 case ATTR_NOLOGIN_ACCOUNT: 767 spw->sp_pwdp = NOLOGINSTRING; 768 if (pwbuf->new_sp_pwdp) { 769 free(pwbuf->new_sp_pwdp); 770 pwbuf->new_sp_pwdp = NULL; 771 } 772 spw->sp_lstchg = DAY_NOW_32; 773 break; 774 case ATTR_EXPIRE_PASSWORD: 775 spw->sp_lstchg = 0; 776 break; 777 case ATTR_LSTCHG: 778 spw->sp_lstchg = p->data.val_i; 779 break; 780 case ATTR_MIN: 781 if (spw->sp_max == -1 && 782 p->data.val_i != -1 && max_present(p->next) == 0) 783 return (PWU_AGING_DISABLED); 784 spw->sp_min = p->data.val_i; 785 aging_set = 1; 786 break; 787 case ATTR_MAX: 788 if (p->data.val_i == -1) { 789 /* Turn aging off -> Reset min and warn too */ 790 791 spw->sp_min = -1; 792 spw->sp_warn = -1; 793 } else { 794 /* Turn aging on */ 795 796 if (spw->sp_min == -1) { 797 /* 798 * If minage has not been set with 799 * a command-line option, we set it 800 * to zero. 801 */ 802 spw->sp_min = 0; 803 } 804 805 /* 806 * If aging was turned off, we update lstchg. 807 * 808 * We take care not to update lstchg if the 809 * user has no password, otherwise the user 810 * might not be required to provide a password 811 * the next time [s]he logs-in. 812 * 813 * Also, if lstchg != -1 (i.e., not set in 814 * /etc/shadow), we keep the old value. 815 */ 816 if (spw->sp_max == -1 && 817 spw->sp_pwdp != NULL && *spw->sp_pwdp && 818 spw->sp_lstchg == -1) { 819 spw->sp_lstchg = DAY_NOW_32; 820 } 821 } 822 823 spw->sp_max = p->data.val_i; 824 825 aging_set = 1; 826 827 break; 828 case ATTR_WARN: 829 if (spw->sp_max == -1 && p->data.val_i != -1 && 830 max_present(p->next) == 0) 831 return (PWU_AGING_DISABLED); 832 spw->sp_warn = p->data.val_i; 833 break; 834 case ATTR_INACT: 835 spw->sp_inact = p->data.val_i; 836 break; 837 case ATTR_EXPIRE: 838 spw->sp_expire = p->data.val_i; 839 break; 840 case ATTR_FLAG: 841 spw->sp_flag = p->data.val_i; 842 break; 843 case ATTR_INCR_FAILED_LOGINS: 844 { 845 int count = (spw->sp_flag & FAILCOUNT_MASK) + 1; 846 spw->sp_flag &= ~FAILCOUNT_MASK; 847 spw->sp_flag |= min(FAILCOUNT_MASK, count); 848 p->data.val_i = count; 849 } 850 break; 851 case ATTR_RST_FAILED_LOGINS: 852 p->data.val_i = spw->sp_flag & FAILCOUNT_MASK; 853 spw->sp_flag &= ~FAILCOUNT_MASK; 854 break; 855 default: 856 break; 857 } 858 } 859 860 /* 861 * What should the new aging values look like? 862 * 863 * There are a number of different conditions 864 * 865 * a) aging is already configured: don't touch it 866 * 867 * b) disable_aging is set: disable aging 868 * 869 * c) aging is not configured: turn on default aging; 870 * 871 * b) and c) of course only if aging_needed and !aging_set. 872 * (i.e., password changed, and aging values not changed) 873 */ 874 875 if (spw != NULL && spw->sp_max <= 0) { 876 /* a) aging not yet configured */ 877 if (aging_needed && !aging_set) { 878 if (disable_aging) { 879 /* b) turn off aging */ 880 spw->sp_min = spw->sp_max = spw->sp_warn = -1; 881 } else { 882 /* c) */ 883 turn_on_default_aging(spw); 884 } 885 } 886 } 887 888 return (PWU_SUCCESS); 889 } 890 891 /* 892 * files_update_shadow(char *name, struct spwd *spwd) 893 * 894 * update the shadow password file SHADOW to contain the spwd structure 895 * "spwd" for user "name" 896 */ 897 int 898 files_update_shadow(char *name, struct spwd *spwd) 899 { 900 struct stat64 stbuf; 901 FILE *dst; 902 FILE *src; 903 struct spwd cur; 904 char buf[SPW_SCRATCH_SIZE]; 905 int tempfd; 906 mode_t filemode; 907 int result = -1; 908 int err = PWU_SUCCESS; 909 910 /* Mode of the shadow file should be 400 or 000 */ 911 if (stat64(SHADOW, &stbuf) < 0) { 912 err = PWU_STAT_FAILED; 913 goto shadow_exit; 914 } 915 916 /* copy mode from current shadow file (0400 or 0000) */ 917 filemode = stbuf.st_mode & S_IRUSR; 918 919 /* 920 * we can't specify filemodes to fopen(), and we SHOULD NOT 921 * set umask in multi-thread safe libraries, so we use 922 * a combination of open() and fdopen() 923 */ 924 tempfd = open(SHADTEMP, O_WRONLY|O_CREAT|O_TRUNC, filemode); 925 if (tempfd < 0) { 926 err = PWU_OPEN_FAILED; 927 goto shadow_exit; 928 } 929 (void) fchown(tempfd, (uid_t)0, stbuf.st_gid); 930 931 if ((dst = fdopen(tempfd, "wF")) == NULL) { 932 err = PWU_OPEN_FAILED; 933 goto shadow_exit; 934 } 935 936 if ((src = fopen(SHADOW, "rF")) == NULL) { 937 err = PWU_OPEN_FAILED; 938 (void) fclose(dst); 939 (void) unlink(SHADTEMP); 940 goto shadow_exit; 941 } 942 943 /* 944 * copy old shadow to temporary file while replacing the entry 945 * that matches "name". 946 */ 947 while (fgetspent_r(src, &cur, buf, sizeof (buf)) != NULL) { 948 949 if (strcmp(cur.sp_namp, name) == 0) 950 result = putspent(spwd, dst); 951 else 952 result = putspent(&cur, dst); 953 954 if (result != 0) { 955 err = PWU_WRITE_FAILED; 956 (void) fclose(src); 957 (void) fclose(dst); 958 goto shadow_exit; 959 } 960 } 961 962 (void) fclose(src); 963 964 if (fclose(dst) != 0) { 965 /* 966 * Something went wrong (ENOSPC for example). Don't 967 * use the resulting temporary file! 968 */ 969 err = PWU_CLOSE_FAILED; 970 (void) unlink(SHADTEMP); 971 goto shadow_exit; 972 } 973 974 /* 975 * Rename stmp to shadow: 976 * 1. make sure /etc/oshadow is gone 977 * 2. ln /etc/shadow /etc/oshadow 978 * 3. mv /etc/stmp /etc/shadow 979 */ 980 if (unlink(OSHADOW) && access(OSHADOW, 0) == 0) { 981 err = PWU_UPDATE_FAILED; 982 (void) unlink(SHADTEMP); 983 goto shadow_exit; 984 } 985 986 if (link(SHADOW, OSHADOW) == -1) { 987 err = PWU_UPDATE_FAILED; 988 (void) unlink(SHADTEMP); 989 goto shadow_exit; 990 } 991 992 if (rename(SHADTEMP, SHADOW) == -1) { 993 err = PWU_UPDATE_FAILED; 994 (void) unlink(SHADTEMP); 995 goto shadow_exit; 996 } 997 (void) unlink(OSHADOW); 998 999 shadow_exit: 1000 return (err); 1001 } 1002 1003 int 1004 files_update_passwd(char *name, struct passwd *pwd) 1005 { 1006 struct stat64 stbuf; 1007 FILE *src, *dst; 1008 int tempfd; 1009 struct passwd cur; 1010 char buf[PWD_SCRATCH_SIZE]; 1011 int result; 1012 int err = PWU_SUCCESS; 1013 1014 if (stat64(PASSWD, &stbuf) < 0) { 1015 err = PWU_STAT_FAILED; 1016 goto passwd_exit; 1017 } 1018 1019 /* see files_update_shadow() for open()+fdopen() rationale */ 1020 1021 if ((tempfd = open(PASSTEMP, O_WRONLY|O_CREAT|O_TRUNC, 0600)) < 0) { 1022 err = PWU_OPEN_FAILED; 1023 goto passwd_exit; 1024 } 1025 if ((dst = fdopen(tempfd, "wF")) == NULL) { 1026 err = PWU_OPEN_FAILED; 1027 goto passwd_exit; 1028 } 1029 if ((src = fopen(PASSWD, "rF")) == NULL) { 1030 err = PWU_OPEN_FAILED; 1031 (void) fclose(dst); 1032 (void) unlink(PASSTEMP); 1033 goto passwd_exit; 1034 } 1035 1036 /* 1037 * copy old password entries to temporary file while replacing 1038 * the entry that matches "name" 1039 */ 1040 while (fgetpwent_r(src, &cur, buf, sizeof (buf)) != NULL) { 1041 if (strcmp(cur.pw_name, name) == 0) 1042 result = putpwent(pwd, dst); 1043 else 1044 result = putpwent(&cur, dst); 1045 if (result != 0) { 1046 err = PWU_WRITE_FAILED; 1047 (void) fclose(src); 1048 (void) fclose(dst); 1049 goto passwd_exit; 1050 } 1051 } 1052 1053 (void) fclose(src); 1054 if (fclose(dst) != 0) { 1055 err = PWU_CLOSE_FAILED; 1056 goto passwd_exit; /* Don't trust the temporary file */ 1057 } 1058 1059 /* Rename temp to passwd */ 1060 if (unlink(OPASSWD) && access(OPASSWD, 0) == 0) { 1061 err = PWU_UPDATE_FAILED; 1062 (void) unlink(PASSTEMP); 1063 goto passwd_exit; 1064 } 1065 1066 if (link(PASSWD, OPASSWD) == -1) { 1067 err = PWU_UPDATE_FAILED; 1068 (void) unlink(PASSTEMP); 1069 goto passwd_exit; 1070 } 1071 1072 if (rename(PASSTEMP, PASSWD) == -1) { 1073 err = PWU_UPDATE_FAILED; 1074 (void) unlink(PASSTEMP); 1075 goto passwd_exit; 1076 } 1077 1078 (void) chmod(PASSWD, 0644); 1079 1080 passwd_exit: 1081 return (err); 1082 1083 } 1084 1085 /* 1086 * files_putpwnam(name, oldpw, dummy, rep, buf) 1087 * 1088 * store the password attributes contained in "buf" in /etc/passwd and 1089 * /etc/shadow. The dummy parameter is a placeholder for NIS+ 1090 * updates where the "oldrpc" password is passed. 1091 */ 1092 /*ARGSUSED*/ 1093 int 1094 files_putpwnam(char *name, char *oldpw, char *dummy, 1095 pwu_repository_t *rep, void *buf) 1096 { 1097 struct pwbuf *pwbuf = (struct pwbuf *)buf; 1098 int result = PWU_SUCCESS; 1099 1100 if (pwbuf->pwd) { 1101 result = files_update_passwd(name, pwbuf->pwd); 1102 } 1103 1104 if (result == PWU_SUCCESS && pwbuf->spwd) { 1105 if (pwbuf->update_history != 0) { 1106 debug("update_history = %d", pwbuf->update_history); 1107 result = files_update_history(name, pwbuf->spwd); 1108 } else { 1109 debug("no password change"); 1110 } 1111 if (result == PWU_SUCCESS) { 1112 result = files_update_shadow(name, pwbuf->spwd); 1113 } 1114 } 1115 1116 if (pwbuf->pwd) { 1117 (void) memset(pwbuf->pwd, 0, sizeof (struct passwd)); 1118 (void) memset(pwbuf->pwd_scratch, 0, PWD_SCRATCH_SIZE); 1119 free(pwbuf->pwd); 1120 free(pwbuf->pwd_scratch); 1121 } 1122 if (pwbuf->spwd) { 1123 (void) memset(pwbuf->spwd, 0, sizeof (struct spwd)); 1124 (void) memset(pwbuf->spwd_scratch, 0, SPW_SCRATCH_SIZE); 1125 free(pwbuf->spwd); 1126 free(pwbuf->spwd_scratch); 1127 } 1128 if (pwbuf->new_sp_pwdp) { 1129 free(pwbuf->new_sp_pwdp); 1130 } 1131 1132 return (result); 1133 } 1134 1135 /* 1136 * NOTE: This is all covered under the repository lock held for updating 1137 * passwd(4) and shadow(4). 1138 */ 1139 int 1140 files_update_history(char *name, struct spwd *spwd) 1141 { 1142 int histsize; 1143 int tmpfd; 1144 FILE *src; /* history database file */ 1145 FILE *dst; /* temp history database being updated */ 1146 struct stat64 statbuf; 1147 char buf[MAX_LOGNAME + MAXHISTORY + 1148 (MAXHISTORY * CRYPT_MAXCIPHERTEXTLEN)+1]; 1149 int found; 1150 1151 if ((histsize = def_getint("HISTORY=", DEFHISTORY)) == 0) { 1152 debug("files_update_history(%s) no history, unlinking", name); 1153 (void) unlink(HISTORY); 1154 return (PWU_SUCCESS); /* no history update defined */ 1155 } 1156 debug("files_update_history(%s, %s) histsize = %d", name, spwd->sp_pwdp, 1157 histsize); 1158 1159 if (histsize > MAXHISTORY) 1160 histsize = MAXHISTORY; 1161 if ((tmpfd = open(HISTEMP, O_WRONLY|O_CREAT|O_TRUNC, HISTMODE)) < 0) { 1162 return (PWU_OPEN_FAILED); 1163 } 1164 (void) fchown(tmpfd, (uid_t)0, (gid_t)0); 1165 1166 /* get ready to copy */ 1167 if (((src = fopen(HISTORY, "rF")) == NULL) && 1168 (errno != ENOENT)) { 1169 (void) unlink(HISTEMP); 1170 return (PWU_OPEN_FAILED); 1171 } 1172 if ((dst = fdopen(tmpfd, "wF")) == NULL) { 1173 (void) fclose(src); 1174 (void) unlink(HISTEMP); 1175 return (PWU_OPEN_FAILED); 1176 } 1177 1178 /* Copy and update if found. Add if not found. */ 1179 1180 found = 0; 1181 1182 while ((src != NULL) && 1183 (fgets(buf, sizeof (buf), src) != NULL)) { 1184 char *user; 1185 char *last; 1186 1187 /* get username field */ 1188 user = strtok_r(buf, ":", &last); 1189 1190 #ifdef DEBUG 1191 debug("files_update_history: read=\"%s\"", user); 1192 #endif /* DEBUG */ 1193 1194 if (strcmp(user, name) == 0) { 1195 char *crypt; 1196 int i; 1197 1198 /* found user, update */ 1199 found++; 1200 (void) fprintf(dst, "%s:%s:", name, spwd->sp_pwdp); 1201 debug("files_update_history: update user\n" 1202 "\t%s:%s:", name, spwd->sp_pwdp); 1203 1204 /* get old crypted password history */ 1205 for (i = 0; i < MAXHISTORY-1; i++) { 1206 crypt = strtok_r(NULL, ":", &last); 1207 if (crypt == NULL || 1208 *crypt == '\n') { 1209 break; 1210 } 1211 (void) fprintf(dst, "%s:", crypt); 1212 debug("\t%d = %s:", i+1, crypt); 1213 } 1214 (void) fprintf(dst, "\n"); 1215 } else { 1216 1217 /* copy other users to updated file */ 1218 (void) fprintf(dst, "%s:%s", user, last); 1219 #ifdef DEBUG 1220 debug("files_update_history: copy line %s", 1221 user); 1222 #endif /* DEBUG */ 1223 } 1224 } 1225 1226 if (found == 0) { 1227 1228 /* user not found, add to history file */ 1229 (void) fprintf(dst, "%s:%s:\n", name, spwd->sp_pwdp); 1230 debug("files_update_history: add line\n" 1231 "\t%s:%s:", name, spwd->sp_pwdp); 1232 } 1233 1234 (void) fclose(src); 1235 1236 /* If something messed up in file system, loose the update */ 1237 if (fclose(dst) != 0) { 1238 1239 debug("files_update_history: update file close failed %d", 1240 errno); 1241 (void) unlink(HISTEMP); 1242 return (PWU_CLOSE_FAILED); 1243 } 1244 1245 /* 1246 * rename history to ohistory, 1247 * rename tmp to history, 1248 * unlink ohistory. 1249 */ 1250 1251 (void) unlink(OHISTORY); 1252 1253 if (stat64(OHISTORY, &statbuf) == 0 || 1254 ((src != NULL) && (link(HISTORY, OHISTORY) != 0)) || 1255 rename(HISTEMP, HISTORY) != 0) { 1256 1257 /* old history won't go away, loose the update */ 1258 debug("files_update_history: update file rename failed %d", 1259 errno); 1260 (void) unlink(HISTEMP); 1261 return (PWU_UPDATE_FAILED); 1262 } 1263 1264 (void) unlink(OHISTORY); 1265 return (PWU_SUCCESS); 1266 } 1267