pwd_mkdb.c revision 1.45
1 /* $NetBSD: pwd_mkdb.c,v 1.45 2009/06/19 16:46:52 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2000, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Copyright (c) 1991, 1993, 1994 31 * The Regents of the University of California. All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 3. Neither the name of the University nor the names of its contributors 42 * may be used to endorse or promote products derived from this software 43 * without specific prior written permission. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 */ 57 58 /* 59 * Portions Copyright(C) 1994, Jason Downs. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 1. Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * 2. Redistributions in binary form must reproduce the above copyright 67 * notice, this list of conditions and the following disclaimer in the 68 * documentation and/or other materials provided with the distribution. 69 * 70 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS 71 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 72 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 73 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, 74 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 75 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 76 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 77 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 78 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 79 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 80 * SUCH DAMAGE. 81 */ 82 83 #if HAVE_NBTOOL_CONFIG_H 84 #include "nbtool_config.h" 85 #endif 86 87 #include <sys/cdefs.h> 88 #if !defined(lint) 89 __COPYRIGHT("@(#) Copyright (c) 2000, 2009\ 90 The NetBSD Foundation, Inc. All rights reserved.\ 91 Copyright (c) 1991, 1993, 1994\ 92 The Regents of the University of California. All rights reserved."); 93 __SCCSID("from: @(#)pwd_mkdb.c 8.5 (Berkeley) 4/20/94"); 94 __RCSID("$NetBSD: pwd_mkdb.c,v 1.45 2009/06/19 16:46:52 christos Exp $"); 95 #endif /* not lint */ 96 97 #if HAVE_NBTOOL_CONFIG_H 98 #include "compat_pwd.h" 99 #else 100 #include <pwd.h> 101 #endif 102 103 #include <sys/param.h> 104 #include <sys/stat.h> 105 #include <sys/types.h> 106 107 #ifndef HAVE_NBTOOL_CONFIG_H 108 #include <machine/bswap.h> 109 #endif 110 111 #include <db.h> 112 #include <err.h> 113 #include <errno.h> 114 #include <fcntl.h> 115 #include <limits.h> 116 #include <signal.h> 117 #include <stdio.h> 118 #include <stdlib.h> 119 #include <string.h> 120 #include <unistd.h> 121 #include <util.h> 122 123 #define MAX_CACHESIZE 8*1024*1024 124 #define MIN_CACHESIZE 2*1024*1024 125 126 #define PERM_INSECURE (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) 127 #define PERM_SECURE (S_IRUSR | S_IWUSR) 128 129 #if HAVE_NBTOOL_CONFIG_H 130 static const char __yp_token[] = "__YP!"; 131 #else 132 /* Pull this out of the C library. */ 133 extern const char __yp_token[]; 134 #endif 135 136 static HASHINFO openinfo = { 137 4096, /* bsize */ 138 32, /* ffactor */ 139 256, /* nelem */ 140 0, /* cachesize */ 141 NULL, /* hash() */ 142 0 /* lorder */ 143 }; 144 145 #define FILE_INSECURE 0x01 146 #define FILE_SECURE 0x02 147 #define FILE_ORIG 0x04 148 149 150 struct pwddb { 151 DB *db; 152 char dbname[MAX(MAXPATHLEN, LINE_MAX * 2)]; 153 const char *fname; 154 uint32_t rversion; 155 uint32_t wversion; 156 }; 157 158 static char *pname; /* password file name */ 159 static char prefix[MAXPATHLEN]; 160 static char oldpwdfile[MAX(MAXPATHLEN, LINE_MAX * 2)]; 161 static int lorder = BYTE_ORDER; 162 static int clean; 163 static int verbose; 164 static int warning; 165 static struct pwddb sdb, idb; 166 167 168 void bailout(void) __attribute__((__noreturn__)); 169 void cp(const char *, const char *, mode_t); 170 void deldbent(struct pwddb *, int, void *); 171 void error(const char *); 172 int getdbent(struct pwddb *, int, void *, struct passwd **); 173 void inconsistency(void); 174 void install(const char *, const char *); 175 int main(int, char **); 176 void putdbents(struct pwddb *, struct passwd *, const char *, int, int, 177 u_int, u_int); 178 void putyptoken(struct pwddb *); 179 void rm(const char *); 180 int scan(FILE *, struct passwd *, int *, int *); 181 void usage(void) __attribute__((__noreturn__)); 182 void wr_error(const char *); 183 uint32_t getversion(const char *); 184 void setversion(struct pwddb *); 185 186 #ifndef __lint__ 187 #define SWAP(sw) \ 188 ((sizeof(sw) == 2 ? (typeof(sw))bswap16((uint16_t)sw) : \ 189 (sizeof(sw) == 4 ? (typeof(sw))bswap32((uint32_t)sw) : \ 190 (sizeof(sw) == 8 ? (typeof(sw))bswap64((uint64_t)sw) : (abort(), 0))))) 191 #else 192 #define SWAP(sw) sw 193 #endif 194 195 static void 196 closedb(struct pwddb *db) 197 { 198 if ((*db->db->close)(db->db) < 0) 199 wr_error(db->dbname); 200 } 201 202 static void 203 opendb(struct pwddb *db, const char *dbname, const char *username, 204 uint32_t req_version, int flags, mode_t perm) 205 { 206 char buf[MAXPATHLEN]; 207 208 (void)snprintf(db->dbname, sizeof(db->dbname), "%s%s.tmp", prefix, 209 dbname); 210 211 if (username != NULL) { 212 (void)snprintf(buf, sizeof(buf), "%s%s", prefix, dbname); 213 cp(buf, db->dbname, perm); 214 } 215 216 db->db = dbopen(db->dbname, flags, perm, DB_HASH, &openinfo); 217 if (db->db == NULL) 218 error(db->dbname); 219 220 db->fname = dbname; 221 db->rversion = getversion(dbname); 222 if (req_version == ~0U) 223 db->wversion = db->rversion; 224 else 225 db->wversion = req_version; 226 227 if (warning && db->rversion == 0 && db->wversion == 0) { 228 warnx("Database %s is a version %u database.", 229 db->fname, db->rversion); 230 warnx("Use %s -V 1 to upgrade once you've recompiled " 231 "all your binaries.", getprogname()); 232 } 233 if (db->wversion != db->rversion) { 234 if (username != NULL) { 235 (void)fprintf(stderr, "%s: you cannot change a single " 236 "record from version %u to version %u\n", 237 getprogname(), db->rversion, db->wversion); 238 bailout(); 239 } else if (verbose) { 240 (void)fprintf(stderr, "%s: changing %s from version " 241 "%u to version %u\n", 242 getprogname(), db->fname, 243 db->rversion, db->wversion); 244 } 245 } else { 246 if (verbose) 247 (void)fprintf(stderr, "%s: %s version %u " 248 "requested %u\n", getprogname(), db->fname, 249 db->rversion, db->wversion); 250 } 251 252 setversion(db); 253 } 254 255 int 256 main(int argc, char *argv[]) 257 { 258 int ch, makeold, tfd, lineno, found, rv, hasyp, secureonly; 259 struct passwd pwd, *tpwd; 260 char *username; 261 FILE *fp, *oldfp; 262 sigset_t set; 263 u_int dbflg, uid_dbflg; 264 int newuser, olduid, flags; 265 struct stat st; 266 u_int cachesize; 267 uint32_t req_version; 268 269 prefix[0] = '\0'; 270 makeold = 0; 271 oldfp = NULL; 272 username = NULL; 273 hasyp = 0; 274 secureonly = 0; 275 found = 0; 276 newuser = 0; 277 cachesize = 0; 278 verbose = 0; 279 warning = 0; 280 req_version = ~0U; 281 282 while ((ch = getopt(argc, argv, "BLc:d:psu:V:vw")) != -1) 283 switch (ch) { 284 case 'B': /* big-endian output */ 285 lorder = BIG_ENDIAN; 286 break; 287 case 'L': /* little-endian output */ 288 lorder = LITTLE_ENDIAN; 289 break; 290 case 'c': 291 cachesize = atoi(optarg) * 1024 * 1024; 292 break; 293 case 'd': /* set prefix */ 294 (void)strlcpy(prefix, optarg, sizeof(prefix)); 295 break; 296 case 'p': /* create V7 "file.orig" */ 297 makeold = 1; 298 break; 299 case 's': /* modify secure db only */ 300 secureonly = 1; 301 break; 302 case 'u': /* modify one user only */ 303 username = optarg; 304 break; 305 case 'V': 306 req_version = (uint32_t)atoi(optarg); 307 if (req_version > 1) 308 err(1, "Unknown version %u\n", req_version); 309 break; 310 case 'v': 311 verbose++; 312 break; 313 case 'w': 314 warning++; 315 break; 316 case '?': 317 default: 318 usage(); 319 } 320 argc -= optind; 321 argv += optind; 322 323 if (argc != 1) 324 usage(); 325 if (username != NULL) 326 if (username[0] == '+' || username[0] == '-') 327 usage(); 328 if (secureonly) 329 makeold = 0; 330 331 /* 332 * This could be changed to allow the user to interrupt. 333 * Probably not worth the effort. 334 */ 335 (void)sigemptyset(&set); 336 (void)sigaddset(&set, SIGTSTP); 337 (void)sigaddset(&set, SIGHUP); 338 (void)sigaddset(&set, SIGINT); 339 (void)sigaddset(&set, SIGQUIT); 340 (void)sigaddset(&set, SIGTERM); 341 (void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL); 342 343 /* We don't care what the user wants. */ 344 (void)umask(0); 345 346 if (username == NULL) 347 flags = O_RDWR | O_CREAT | O_EXCL; 348 else 349 flags = O_RDWR; 350 351 pname = *argv; 352 /* Open the original password file */ 353 if ((fp = fopen(pname, "r")) == NULL) 354 error(pname); 355 356 openinfo.lorder = lorder; 357 358 if (fstat(fileno(fp), &st) == -1) 359 error(pname); 360 361 if (cachesize) { 362 openinfo.cachesize = cachesize; 363 } else { 364 /* Tweak openinfo values for large passwd files. */ 365 cachesize = (u_int)(st.st_size * 20); 366 if (cachesize > MAX_CACHESIZE) 367 cachesize = MAX_CACHESIZE; 368 else if (cachesize < MIN_CACHESIZE) 369 cachesize = MIN_CACHESIZE; 370 openinfo.cachesize = cachesize; 371 } 372 373 /* Open the temporary insecure password database. */ 374 if (!secureonly) { 375 opendb(&idb, _PATH_MP_DB, username, req_version, 376 flags, PERM_INSECURE); 377 clean |= FILE_INSECURE; 378 } 379 380 381 /* Open the temporary encrypted password database. */ 382 opendb(&sdb, _PATH_SMP_DB, username, req_version, flags, PERM_SECURE); 383 clean |= FILE_SECURE; 384 385 /* 386 * Open file for old password file. Minor trickiness -- don't want to 387 * chance the file already existing, since someone (stupidly) might 388 * still be using this for permission checking. So, open it first and 389 * fdopen the resulting fd. The resulting file should be readable by 390 * everyone. 391 */ 392 if (makeold) { 393 (void)snprintf(oldpwdfile, sizeof(oldpwdfile), "%s.orig", 394 pname); 395 if ((tfd = open(oldpwdfile, O_WRONLY | O_CREAT | O_EXCL, 396 PERM_INSECURE)) < 0) 397 error(oldpwdfile); 398 clean |= FILE_ORIG; 399 if ((oldfp = fdopen(tfd, "w")) == NULL) 400 error(oldpwdfile); 401 } 402 403 if (username != NULL) { 404 uid_dbflg = 0; 405 dbflg = 0; 406 407 /* 408 * Determine if this is a new entry. 409 */ 410 if (getdbent(&sdb, _PW_KEYBYNAME, username, &tpwd)) 411 newuser = 1; 412 else { 413 newuser = 0; 414 olduid = tpwd->pw_uid; 415 } 416 417 } else { 418 uid_dbflg = R_NOOVERWRITE; 419 dbflg = R_NOOVERWRITE; 420 } 421 422 /* 423 * If we see something go by that looks like YP, we save a special 424 * pointer record, which if YP is enabled in the C lib, will speed 425 * things up. 426 */ 427 for (lineno = 0; scan(fp, &pwd, &flags, &lineno);) { 428 /* 429 * Create original format password file entry. 430 */ 431 if (makeold) { 432 (void)fprintf(oldfp, "%s:*:%d:%d:%s:%s:%s\n", 433 pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos, 434 pwd.pw_dir, pwd.pw_shell); 435 if (ferror(oldfp)) 436 wr_error(oldpwdfile); 437 } 438 439 if (username == NULL) { 440 /* Look like YP? */ 441 if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') 442 hasyp++; 443 444 /* Warn about potentially unsafe uid/gid overrides. */ 445 if (pwd.pw_name[0] == '+') { 446 if ((flags & _PASSWORD_NOUID) == 0 && 447 pwd.pw_uid == 0) 448 warnx("line %d: superuser override " 449 "in YP inclusion", lineno); 450 if ((flags & _PASSWORD_NOGID) == 0 && 451 pwd.pw_gid == 0) 452 warnx("line %d: wheel override " 453 "in YP inclusion", lineno); 454 } 455 456 /* Write the database entry out. */ 457 if (!secureonly) 458 putdbents(&idb, &pwd, "*", flags, lineno, dbflg, 459 uid_dbflg); 460 continue; 461 } else if (strcmp(username, pwd.pw_name) != 0) 462 continue; 463 464 if (found) { 465 warnx("user `%s' listed twice in password file", 466 username); 467 bailout(); 468 } 469 470 /* 471 * Ensure that the text file and database agree on 472 * which line the record is from. 473 */ 474 rv = getdbent(&sdb, _PW_KEYBYNUM, &lineno, &tpwd); 475 if (newuser) { 476 if (rv == 0) 477 inconsistency(); 478 } else if (rv == -1 || 479 strcmp(username, tpwd->pw_name) != 0) 480 inconsistency(); 481 else if ((uid_t)olduid != pwd.pw_uid) { 482 /* 483 * If we're changing UID, remove the BYUID 484 * record for the old UID only if it has the 485 * same username. 486 */ 487 if (!getdbent(&sdb, _PW_KEYBYUID, &olduid, &tpwd)) { 488 if (strcmp(username, tpwd->pw_name) == 0) { 489 if (!secureonly) 490 deldbent(&idb, _PW_KEYBYUID, 491 &olduid); 492 deldbent(&sdb, _PW_KEYBYUID, &olduid); 493 } 494 } else 495 inconsistency(); 496 } 497 498 /* 499 * If there's an existing BYUID record for the new UID and 500 * the username doesn't match then be sure not to overwrite 501 * it. 502 */ 503 if (!getdbent(&sdb, _PW_KEYBYUID, &pwd.pw_uid, &tpwd)) 504 if (strcmp(username, tpwd->pw_name) != 0) 505 uid_dbflg = R_NOOVERWRITE; 506 507 /* Write the database entries out */ 508 if (!secureonly) 509 putdbents(&idb, &pwd, "*", flags, lineno, dbflg, 510 uid_dbflg); 511 putdbents(&sdb, &pwd, pwd.pw_passwd, flags, lineno, dbflg, 512 uid_dbflg); 513 514 found = 1; 515 if (!makeold) 516 break; 517 } 518 519 if (!secureonly) { 520 /* Store YP token if needed. */ 521 if (hasyp) 522 putyptoken(&idb); 523 524 /* Close the insecure database. */ 525 closedb(&idb); 526 } 527 528 /* 529 * If rebuilding the databases, we re-parse the text file and write 530 * the secure entries out in a separate pass. 531 */ 532 if (username == NULL) { 533 rewind(fp); 534 for (lineno = 0; scan(fp, &pwd, &flags, &lineno);) 535 putdbents(&sdb, &pwd, pwd.pw_passwd, flags, 536 lineno, dbflg, uid_dbflg); 537 538 /* Store YP token if needed. */ 539 if (hasyp) 540 putyptoken(&sdb); 541 } else if (!found) { 542 warnx("user `%s' not found in password file", username); 543 bailout(); 544 } 545 546 /* Close the secure database. */ 547 closedb(&sdb); 548 549 /* Install as the real password files. */ 550 if (!secureonly) 551 install(idb.dbname, idb.fname); 552 install(sdb.dbname, sdb.fname); 553 554 /* Install the V7 password file. */ 555 if (makeold) { 556 if (fflush(oldfp) == EOF) 557 wr_error(oldpwdfile); 558 if (fclose(oldfp) == EOF) 559 wr_error(oldpwdfile); 560 install(oldpwdfile, _PATH_PASSWD); 561 } 562 563 /* Set master.passwd permissions, in case caller forgot. */ 564 (void)fchmod(fileno(fp), S_IRUSR|S_IWUSR); 565 if (fclose(fp) == EOF) 566 wr_error(pname); 567 568 /* 569 * Move the temporary master password file LAST -- chpass(1), 570 * passwd(1), vipw(8) and friends all use its existence to block 571 * other incarnations of themselves. The rename means that 572 * everything is unlocked, as the original file can no longer be 573 * accessed. 574 */ 575 install(pname, _PATH_MASTERPASSWD); 576 exit(EXIT_SUCCESS); 577 /* NOTREACHED */ 578 } 579 580 int 581 scan(FILE *fp, struct passwd *pw, int *flags, int *lineno) 582 { 583 static char line[LINE_MAX]; 584 char *p; 585 int oflags; 586 587 if (fgets(line, (int)sizeof(line), fp) == NULL) 588 return (0); 589 (*lineno)++; 590 591 /* 592 * ``... if I swallow anything evil, put your fingers down my 593 * throat...'' 594 * -- The Who 595 */ 596 if ((p = strchr(line, '\n')) == NULL) { 597 warnx("line too long"); 598 errno = EFTYPE; /* XXX */ 599 error(pname); 600 } 601 *p = '\0'; 602 if (strcmp(line, "+") == 0) { 603 /* pw_scan() can't handle "+" */ 604 (void)strcpy(line, "+:::::::::"); 605 } 606 oflags = 0; 607 if (!pw_scan(line, pw, &oflags)) { 608 warnx("at line #%d", *lineno); 609 errno = EFTYPE; /* XXX */ 610 error(pname); 611 } 612 *flags = oflags; 613 614 return (1); 615 } 616 617 void 618 install(const char *from, const char *to) 619 { 620 char buf[MAXPATHLEN]; 621 char errbuf[BUFSIZ]; 622 int sverrno; 623 624 (void)snprintf(buf, sizeof(buf), "%s%s", prefix, to); 625 if (rename(from, buf)) { 626 sverrno = errno; 627 (void)snprintf(errbuf, sizeof(errbuf), "%s to %s", from, buf); 628 errno = sverrno; 629 error(errbuf); 630 } 631 } 632 633 void 634 rm(const char *victim) 635 { 636 637 if (unlink(victim) < 0) 638 warn("unlink(%s)", victim); 639 } 640 641 void 642 cp(const char *from, const char *to, mode_t mode) 643 { 644 static char buf[MAXBSIZE]; 645 int from_fd, to_fd, sverrno; 646 ssize_t rcount, wcount; 647 648 if ((from_fd = open(from, O_RDONLY, 0)) < 0) 649 error(from); 650 if ((to_fd = open(to, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) 651 error(to); 652 while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) { 653 wcount = write(to_fd, buf, (size_t)rcount); 654 if (rcount != wcount || wcount == -1) { 655 sverrno = errno; 656 (void)snprintf(buf, sizeof(buf), "%s to %s", from, to); 657 errno = sverrno; 658 error(buf); 659 } 660 } 661 662 if (rcount < 0) { 663 sverrno = errno; 664 (void)snprintf(buf, sizeof(buf), "%s to %s", from, to); 665 errno = sverrno; 666 error(buf); 667 } 668 } 669 670 void 671 wr_error(const char *str) 672 { 673 char errbuf[BUFSIZ]; 674 int sverrno; 675 676 sverrno = errno; 677 678 (void)snprintf(errbuf, sizeof(errbuf), 679 "attempt to write %s failed", str); 680 681 errno = sverrno; 682 error(errbuf); 683 } 684 685 void 686 error(const char *str) 687 { 688 689 warn("%s", str); 690 bailout(); 691 } 692 693 void 694 inconsistency(void) 695 { 696 697 warnx("text files and databases are inconsistent"); 698 warnx("re-build the databases without -u"); 699 bailout(); 700 } 701 702 void 703 bailout(void) 704 { 705 706 if ((clean & FILE_ORIG) != 0) 707 rm(oldpwdfile); 708 if ((clean & FILE_SECURE) != 0) 709 rm(sdb.dbname); 710 if ((clean & FILE_INSECURE) != 0) 711 rm(idb.dbname); 712 713 exit(EXIT_FAILURE); 714 } 715 716 uint32_t 717 getversion(const char *fname) 718 { 719 DBT data, key; 720 int ret; 721 uint32_t version = 0; 722 DB *db; 723 724 db = dbopen(fname, O_RDONLY, PERM_INSECURE, DB_HASH, NULL); 725 if (db == NULL) { 726 /* If we are building on a separate root, assume version 1 */ 727 if (errno == EACCES && prefix[0]) 728 return 1; 729 warn("Cannot open database %s", fname); 730 bailout(); 731 } 732 key.data = __UNCONST("VERSION"); 733 key.size = strlen((const char *)key.data) + 1; 734 735 switch (ret = (*db->get)(db, &key, &data, 0)) { 736 case -1: /* Error */ 737 warn("Cannot get VERSION record from database"); 738 goto out; 739 case 0: 740 if (data.size != sizeof(version)) { 741 warnx("Bad VERSION record in database"); 742 goto out; 743 } 744 (void)memcpy(&version, data.data, sizeof(version)); 745 /*FALLTHROUGH*/ 746 case 1: 747 if (ret == 1) 748 warnx("Database %s has no version info", fname); 749 (*db->close)(db); 750 return version; 751 default: 752 warnx("internal error db->get returns %d", ret); 753 goto out; 754 } 755 out: 756 (*db->close)(db); 757 bailout(); 758 /*NOTREACHED*/ 759 } 760 761 void 762 setversion(struct pwddb *db) 763 { 764 DBT data, key; 765 key.data = __UNCONST("VERSION"); 766 key.size = strlen((const char *)key.data) + 1; 767 768 data.data = &db->wversion; 769 data.size = sizeof(uint32_t); 770 771 if ((*db->db->put)(db->db, &key, &data, 0) != 0) { 772 warn("Can't write VERSION record to %s", db->dbname); 773 bailout(); 774 } 775 } 776 777 778 /* 779 * Write entries to a database for a single user. 780 * 781 * The databases actually contain three copies of the original data. Each 782 * password file entry is converted into a rough approximation of a ``struct 783 * passwd'', with the strings placed inline. This object is then stored as 784 * the data for three separate keys. The first key * is the pw_name field 785 * prepended by the _PW_KEYBYNAME character. The second key is the pw_uid 786 * field prepended by the _PW_KEYBYUID character. The third key is the line 787 * number in the original file prepended by the _PW_KEYBYNUM character. 788 * (The special characters are prepended to ensure that the keys do not 789 * collide.) 790 */ 791 #define COMPACT(e) for (t = e; (*p++ = *t++) != '\0';) 792 793 void 794 putdbents(struct pwddb *db, struct passwd *pw, const char *passwd, int flags, 795 int lineno, u_int dbflg, u_int uid_dbflg) 796 { 797 struct passwd pwd; 798 char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024], *p; 799 DBT data, key; 800 const char *t; 801 u_int32_t x; 802 size_t len; 803 804 (void)memcpy(&pwd, pw, sizeof(pwd)); 805 data.data = (u_char *)buf; 806 key.data = (u_char *)tbuf; 807 808 if (lorder != BYTE_ORDER) { 809 pwd.pw_uid = SWAP(pwd.pw_uid); 810 pwd.pw_gid = SWAP(pwd.pw_gid); 811 } 812 813 #define WRITEPWTIMEVAR(pwvar) \ 814 do { \ 815 if (db->wversion == 0 && \ 816 /*CONSTCOND*/sizeof(pwvar) == sizeof(uint64_t)) { \ 817 uint32_t tmp = (uint32_t)pwvar; \ 818 if (lorder != BYTE_ORDER) \ 819 tmp = SWAP(tmp); \ 820 (void)memmove(p, &tmp, sizeof(tmp)); \ 821 p += sizeof(tmp); \ 822 } else if (db->wversion == 1 && \ 823 /*CONSTCOND*/sizeof(pwvar) == sizeof(uint32_t)) { \ 824 uint64_t tmp = pwvar; \ 825 if (lorder != BYTE_ORDER) \ 826 tmp = SWAP(tmp); \ 827 (void)memmove(p, &tmp, sizeof(tmp)); \ 828 p += sizeof(tmp); \ 829 } else { \ 830 if (lorder != BYTE_ORDER) \ 831 pwvar = SWAP(pwvar); \ 832 (void)memmove(p, &pwvar, sizeof(pwvar)); \ 833 p += sizeof(pwvar); \ 834 } \ 835 } while (/*CONSTCOND*/0) 836 837 /* Create insecure data. */ 838 p = buf; 839 COMPACT(pwd.pw_name); 840 COMPACT(passwd); 841 (void)memmove(p, &pwd.pw_uid, sizeof(pwd.pw_uid)); 842 p += sizeof(pwd.pw_uid); 843 (void)memmove(p, &pwd.pw_gid, sizeof(pwd.pw_gid)); 844 p += sizeof(pwd.pw_gid); 845 WRITEPWTIMEVAR(pwd.pw_change); 846 COMPACT(pwd.pw_class); 847 COMPACT(pwd.pw_gecos); 848 COMPACT(pwd.pw_dir); 849 COMPACT(pwd.pw_shell); 850 WRITEPWTIMEVAR(pwd.pw_expire); 851 x = flags; 852 if (lorder != BYTE_ORDER) 853 x = SWAP(x); 854 (void)memmove(p, &x, sizeof(x)); 855 p += sizeof(flags); 856 data.size = p - buf; 857 858 /* Store insecure by name. */ 859 tbuf[0] = _PW_KEYBYNAME; 860 len = strlen(pwd.pw_name); 861 (void)memmove(tbuf + 1, pwd.pw_name, len); 862 key.size = len + 1; 863 if ((*db->db->put)(db->db, &key, &data, dbflg) == -1) 864 wr_error(db->dbname); 865 866 /* Store insecure by number. */ 867 tbuf[0] = _PW_KEYBYNUM; 868 x = lineno; 869 if (lorder != BYTE_ORDER) 870 x = SWAP(x); 871 (void)memmove(tbuf + 1, &x, sizeof(x)); 872 key.size = sizeof(x) + 1; 873 if ((*db->db->put)(db->db, &key, &data, dbflg) == -1) 874 wr_error(db->dbname); 875 876 /* Store insecure by uid. */ 877 tbuf[0] = _PW_KEYBYUID; 878 (void)memmove(tbuf + 1, &pwd.pw_uid, sizeof(pwd.pw_uid)); 879 key.size = sizeof(pwd.pw_uid) + 1; 880 if ((*db->db->put)(db->db, &key, &data, uid_dbflg) == -1) 881 wr_error(db->dbname); 882 } 883 884 void 885 deldbent(struct pwddb *db, int type, void *keyp) 886 { 887 char tbuf[1024]; 888 DBT key; 889 u_int32_t x; 890 size_t len; 891 892 key.data = (u_char *)tbuf; 893 894 switch (tbuf[0] = type) { 895 case _PW_KEYBYNAME: 896 len = strlen((char *)keyp); 897 (void)memcpy(tbuf + 1, keyp, len); 898 key.size = len + 1; 899 break; 900 901 case _PW_KEYBYNUM: 902 case _PW_KEYBYUID: 903 x = *(int *)keyp; 904 if (lorder != BYTE_ORDER) 905 x = SWAP(x); 906 (void)memmove(tbuf + 1, &x, sizeof(x)); 907 key.size = sizeof(x) + 1; 908 break; 909 } 910 911 if ((*db->db->del)(db->db, &key, 0) == -1) 912 wr_error(db->dbname); 913 } 914 915 int 916 getdbent(struct pwddb *db, int type, void *keyp, struct passwd **tpwd) 917 { 918 static char buf[MAX(MAXPATHLEN, LINE_MAX * 2)]; 919 static struct passwd pwd; 920 char tbuf[1024], *p; 921 DBT key, data; 922 u_int32_t x; 923 size_t len; 924 int rv; 925 926 data.data = (u_char *)buf; 927 data.size = sizeof(buf); 928 key.data = (u_char *)tbuf; 929 930 switch (tbuf[0] = type) { 931 case _PW_KEYBYNAME: 932 len = strlen((char *)keyp); 933 (void)memcpy(tbuf + 1, keyp, len); 934 key.size = len + 1; 935 break; 936 937 case _PW_KEYBYNUM: 938 case _PW_KEYBYUID: 939 x = *(int *)keyp; 940 if (lorder != BYTE_ORDER) 941 x = SWAP(x); 942 (void)memmove(tbuf + 1, &x, sizeof(x)); 943 key.size = sizeof(x) + 1; 944 break; 945 } 946 947 if ((rv = (*db->db->get)(db->db, &key, &data, 0)) == 1) 948 return (rv); 949 if (rv == -1) 950 error(db->dbname); 951 952 p = (char *)data.data; 953 954 pwd.pw_name = p; 955 while (*p++ != '\0') 956 continue; 957 pwd.pw_passwd = p; 958 while (*p++ != '\0') 959 continue; 960 961 (void)memcpy(&pwd.pw_uid, p, sizeof(pwd.pw_uid)); 962 p += sizeof(pwd.pw_uid); 963 (void)memcpy(&pwd.pw_gid, p, sizeof(pwd.pw_gid)); 964 p += sizeof(pwd.pw_gid); 965 966 #define READPWTIMEVAR(pwvar) \ 967 do { \ 968 if (db->rversion == 0 && \ 969 /*CONSTCOND*/sizeof(pwvar) == sizeof(uint64_t)) { \ 970 uint32_t tmp; \ 971 (void)memcpy(&tmp, p, sizeof(tmp)); \ 972 p += sizeof(tmp); \ 973 if (lorder != BYTE_ORDER) \ 974 pwvar = SWAP(tmp); \ 975 else \ 976 pwvar = tmp; \ 977 } else if (db->rversion == 1 && \ 978 /*CONSTCOND*/sizeof(pwvar) == sizeof(uint32_t)) { \ 979 uint64_t tmp; \ 980 (void)memcpy(&tmp, p, sizeof(tmp)); \ 981 p += sizeof(tmp); \ 982 if (lorder != BYTE_ORDER) \ 983 pwvar = (uint32_t)SWAP(tmp); \ 984 else \ 985 pwvar = (uint32_t)tmp; \ 986 } else { \ 987 (void)memcpy(&pwvar, p, sizeof(pwvar)); \ 988 p += sizeof(pwvar); \ 989 if (lorder != BYTE_ORDER) \ 990 pwvar = SWAP(pwvar); \ 991 } \ 992 } while (/*CONSTCOND*/0) 993 994 READPWTIMEVAR(pwd.pw_change); 995 996 pwd.pw_class = p; 997 while (*p++ != '\0') 998 continue; 999 pwd.pw_gecos = p; 1000 while (*p++ != '\0') 1001 continue; 1002 pwd.pw_dir = p; 1003 while (*p++ != '\0') 1004 continue; 1005 pwd.pw_shell = p; 1006 while (*p++ != '\0') 1007 continue; 1008 1009 READPWTIMEVAR(pwd.pw_expire); 1010 1011 if (lorder != BYTE_ORDER) { 1012 pwd.pw_uid = SWAP(pwd.pw_uid); 1013 pwd.pw_gid = SWAP(pwd.pw_gid); 1014 } 1015 1016 *tpwd = &pwd; 1017 return (0); 1018 } 1019 1020 void 1021 putyptoken(struct pwddb *db) 1022 { 1023 DBT data, key; 1024 1025 key.data = __UNCONST(__yp_token); 1026 key.size = strlen(__yp_token); 1027 data.data = (u_char *)NULL; 1028 data.size = 0; 1029 1030 if ((*db->db->put)(db->db, &key, &data, R_NOOVERWRITE) == -1) 1031 wr_error(db->dbname); 1032 } 1033 1034 void 1035 usage(void) 1036 { 1037 1038 (void)fprintf(stderr, 1039 "Usage: %s [-BLpsvw] [-c cachesize] [-d directory] [-u user] " 1040 "[-V version] file\n", 1041 getprogname()); 1042 exit(EXIT_FAILURE); 1043 } 1044
Indexes created Tue Sep 30 20:09:53 GMT 2025