1/* 2 * Copyright (c) 1997-2005 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include "kpasswd_locl.h" 35RCSID("$Id: kpasswdd.c 22252 2007-12-09 05:59:34Z lha $"); 36 37#include <kadm5/admin.h> 38#ifdef HAVE_SYS_UN_H 39#include <sys/un.h> 40#endif 41#include <hdb.h> 42#include <kadm5/private.h> 43 44static krb5_context context; 45static krb5_log_facility *log_facility; 46 47static struct getarg_strings addresses_str; 48krb5_addresses explicit_addresses; 49 50static sig_atomic_t exit_flag = 0; 51 52static void 53add_one_address (const char *str, int first) 54{ 55 krb5_error_code ret; 56 krb5_addresses tmp; 57 58 ret = krb5_parse_address (context, str, &tmp); 59 if (ret) 60 krb5_err (context, 1, ret, "parse_address `%s'", str); 61 if (first) 62 krb5_copy_addresses(context, &tmp, &explicit_addresses); 63 else 64 krb5_append_addresses(context, &explicit_addresses, &tmp); 65 krb5_free_addresses (context, &tmp); 66} 67 68static void 69send_reply (int s, 70 struct sockaddr *sa, 71 int sa_size, 72 krb5_data *ap_rep, 73 krb5_data *rest) 74{ 75 struct msghdr msghdr; 76 struct iovec iov[3]; 77 uint16_t len, ap_rep_len; 78 u_char header[6]; 79 u_char *p; 80 81 if (ap_rep) 82 ap_rep_len = ap_rep->length; 83 else 84 ap_rep_len = 0; 85 86 len = 6 + ap_rep_len + rest->length; 87 p = header; 88 *p++ = (len >> 8) & 0xFF; 89 *p++ = (len >> 0) & 0xFF; 90 *p++ = 0; 91 *p++ = 1; 92 *p++ = (ap_rep_len >> 8) & 0xFF; 93 *p++ = (ap_rep_len >> 0) & 0xFF; 94 95 memset (&msghdr, 0, sizeof(msghdr)); 96 msghdr.msg_name = (void *)sa; 97 msghdr.msg_namelen = sa_size; 98 msghdr.msg_iov = iov; 99 msghdr.msg_iovlen = sizeof(iov)/sizeof(*iov); 100#if 0 101 msghdr.msg_control = NULL; 102 msghdr.msg_controllen = 0; 103#endif 104 105 iov[0].iov_base = (char *)header; 106 iov[0].iov_len = 6; 107 if (ap_rep_len) { 108 iov[1].iov_base = ap_rep->data; 109 iov[1].iov_len = ap_rep->length; 110 } else { 111 iov[1].iov_base = NULL; 112 iov[1].iov_len = 0; 113 } 114 iov[2].iov_base = rest->data; 115 iov[2].iov_len = rest->length; 116 117 if (sendmsg (s, &msghdr, 0) < 0) 118 krb5_warn (context, errno, "sendmsg"); 119} 120 121static int 122make_result (krb5_data *data, 123 uint16_t result_code, 124 const char *expl) 125{ 126 char *str; 127 krb5_data_zero (data); 128 129 data->length = asprintf (&str, 130 "%c%c%s", 131 (result_code >> 8) & 0xFF, 132 result_code & 0xFF, 133 expl); 134 135 if (str == NULL) { 136 krb5_warnx (context, "Out of memory generating error reply"); 137 return 1; 138 } 139 data->data = str; 140 return 0; 141} 142 143static void 144reply_error (krb5_realm realm, 145 int s, 146 struct sockaddr *sa, 147 int sa_size, 148 krb5_error_code error_code, 149 uint16_t result_code, 150 const char *expl) 151{ 152 krb5_error_code ret; 153 krb5_data error_data; 154 krb5_data e_data; 155 krb5_principal server = NULL; 156 157 if (make_result(&e_data, result_code, expl)) 158 return; 159 160 if (realm) { 161 ret = krb5_make_principal (context, &server, realm, 162 "kadmin", "changepw", NULL); 163 if (ret) { 164 krb5_data_free (&e_data); 165 return; 166 } 167 } 168 169 ret = krb5_mk_error (context, 170 error_code, 171 NULL, 172 &e_data, 173 NULL, 174 server, 175 NULL, 176 NULL, 177 &error_data); 178 if (server) 179 krb5_free_principal(context, server); 180 krb5_data_free (&e_data); 181 if (ret) { 182 krb5_warn (context, ret, "Could not even generate error reply"); 183 return; 184 } 185 send_reply (s, sa, sa_size, NULL, &error_data); 186 krb5_data_free (&error_data); 187} 188 189static void 190reply_priv (krb5_auth_context auth_context, 191 int s, 192 struct sockaddr *sa, 193 int sa_size, 194 uint16_t result_code, 195 const char *expl) 196{ 197 krb5_error_code ret; 198 krb5_data krb_priv_data; 199 krb5_data ap_rep_data; 200 krb5_data e_data; 201 202 ret = krb5_mk_rep (context, 203 auth_context, 204 &ap_rep_data); 205 if (ret) { 206 krb5_warn (context, ret, "Could not even generate error reply"); 207 return; 208 } 209 210 if (make_result(&e_data, result_code, expl)) 211 return; 212 213 ret = krb5_mk_priv (context, 214 auth_context, 215 &e_data, 216 &krb_priv_data, 217 NULL); 218 krb5_data_free (&e_data); 219 if (ret) { 220 krb5_warn (context, ret, "Could not even generate error reply"); 221 return; 222 } 223 send_reply (s, sa, sa_size, &ap_rep_data, &krb_priv_data); 224 krb5_data_free (&ap_rep_data); 225 krb5_data_free (&krb_priv_data); 226} 227 228/* 229 * Change the password for `principal', sending the reply back on `s' 230 * (`sa', `sa_size') to `pwd_data'. 231 */ 232 233static void 234change (krb5_auth_context auth_context, 235 krb5_principal admin_principal, 236 uint16_t version, 237 int s, 238 struct sockaddr *sa, 239 int sa_size, 240 krb5_data *in_data) 241{ 242 krb5_error_code ret; 243 char *client = NULL, *admin = NULL; 244 const char *pwd_reason; 245 kadm5_config_params conf; 246 void *kadm5_handle = NULL; 247 krb5_principal principal; 248 krb5_data *pwd_data = NULL; 249 char *tmp; 250 ChangePasswdDataMS chpw; 251 252 memset (&conf, 0, sizeof(conf)); 253 memset(&chpw, 0, sizeof(chpw)); 254 255 if (version == KRB5_KPASSWD_VERS_CHANGEPW) { 256 ret = krb5_copy_data(context, in_data, &pwd_data); 257 if (ret) { 258 krb5_warn (context, ret, "krb5_copy_data"); 259 reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_MALFORMED, 260 "out out memory copying password"); 261 return; 262 } 263 principal = admin_principal; 264 } else if (version == KRB5_KPASSWD_VERS_SETPW) { 265 size_t len; 266 267 ret = decode_ChangePasswdDataMS(in_data->data, in_data->length, 268 &chpw, &len); 269 if (ret) { 270 krb5_warn (context, ret, "decode_ChangePasswdDataMS"); 271 reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_MALFORMED, 272 "malformed ChangePasswdData"); 273 return; 274 } 275 276 277 ret = krb5_copy_data(context, &chpw.newpasswd, &pwd_data); 278 if (ret) { 279 krb5_warn (context, ret, "krb5_copy_data"); 280 reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_MALFORMED, 281 "out out memory copying password"); 282 goto out; 283 } 284 285 if (chpw.targname == NULL && chpw.targrealm != NULL) { 286 krb5_warn (context, ret, "kadm5_init_with_password_ctx"); 287 reply_priv (auth_context, s, sa, sa_size, 288 KRB5_KPASSWD_MALFORMED, 289 "targrealm but not targname"); 290 goto out; 291 } 292 293 if (chpw.targname) { 294 krb5_principal_data princ; 295 296 princ.name = *chpw.targname; 297 princ.realm = *chpw.targrealm; 298 if (princ.realm == NULL) { 299 ret = krb5_get_default_realm(context, &princ.realm); 300 301 if (ret) { 302 krb5_warnx (context, 303 "kadm5_init_with_password_ctx: " 304 "failed to allocate realm"); 305 reply_priv (auth_context, s, sa, sa_size, 306 KRB5_KPASSWD_SOFTERROR, 307 "failed to allocate realm"); 308 goto out; 309 } 310 } 311 ret = krb5_copy_principal(context, &princ, &principal); 312 if (*chpw.targrealm == NULL) 313 free(princ.realm); 314 if (ret) { 315 krb5_warn(context, ret, "krb5_copy_principal"); 316 reply_priv(auth_context, s, sa, sa_size, 317 KRB5_KPASSWD_HARDERROR, 318 "failed to allocate principal"); 319 goto out; 320 } 321 } else 322 principal = admin_principal; 323 } else { 324 krb5_warnx (context, "kadm5_init_with_password_ctx: unknown proto"); 325 reply_priv (auth_context, s, sa, sa_size, 326 KRB5_KPASSWD_HARDERROR, 327 "Unknown protocol used"); 328 return; 329 } 330 331 ret = krb5_unparse_name (context, admin_principal, &admin); 332 if (ret) { 333 krb5_warn (context, ret, "unparse_name failed"); 334 reply_priv (auth_context, s, sa, sa_size, 335 KRB5_KPASSWD_HARDERROR, "out of memory error"); 336 goto out; 337 } 338 339 conf.realm = principal->realm; 340 conf.mask |= KADM5_CONFIG_REALM; 341 342 ret = kadm5_init_with_password_ctx(context, 343 admin, 344 NULL, 345 KADM5_ADMIN_SERVICE, 346 &conf, 0, 0, 347 &kadm5_handle); 348 if (ret) { 349 krb5_warn (context, ret, "kadm5_init_with_password_ctx"); 350 reply_priv (auth_context, s, sa, sa_size, 2, 351 "Internal error"); 352 goto out; 353 } 354 355 ret = krb5_unparse_name(context, principal, &client); 356 if (ret) { 357 krb5_warn (context, ret, "unparse_name failed"); 358 reply_priv (auth_context, s, sa, sa_size, 359 KRB5_KPASSWD_HARDERROR, "out of memory error"); 360 goto out; 361 } 362 363 /* 364 * Check password quality if not changing as administrator 365 */ 366 367 if (krb5_principal_compare(context, admin_principal, principal) == TRUE) { 368 369 pwd_reason = kadm5_check_password_quality (context, principal, 370 pwd_data); 371 if (pwd_reason != NULL ) { 372 krb5_warnx (context, 373 "%s didn't pass password quality check with error: %s", 374 client, pwd_reason); 375 reply_priv (auth_context, s, sa, sa_size, 376 KRB5_KPASSWD_SOFTERROR, pwd_reason); 377 goto out; 378 } 379 krb5_warnx (context, "Changing password for %s", client); 380 } else { 381 ret = _kadm5_acl_check_permission(kadm5_handle, KADM5_PRIV_CPW, 382 principal); 383 if (ret) { 384 krb5_warn (context, ret, 385 "Check ACL failed for %s for changing %s password", 386 admin, client); 387 reply_priv (auth_context, s, sa, sa_size, 388 KRB5_KPASSWD_HARDERROR, "permission denied"); 389 goto out; 390 } 391 krb5_warnx (context, "%s is changing password for %s", admin, client); 392 } 393 394 ret = krb5_data_realloc(pwd_data, pwd_data->length + 1); 395 if (ret) { 396 krb5_warn (context, ret, "malloc: out of memory"); 397 reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_HARDERROR, 398 "Internal error"); 399 goto out; 400 } 401 tmp = pwd_data->data; 402 tmp[pwd_data->length - 1] = '\0'; 403 404 ret = kadm5_s_chpass_principal_cond (kadm5_handle, principal, tmp); 405 krb5_free_data (context, pwd_data); 406 pwd_data = NULL; 407 if (ret) { 408 char *str = krb5_get_error_message(context, ret); 409 krb5_warnx(context, "kadm5_s_chpass_principal_cond: %s", str); 410 reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_SOFTERROR, 411 str ? str : "Internal error"); 412 krb5_free_error_string(context, str); 413 goto out; 414 } 415 reply_priv (auth_context, s, sa, sa_size, KRB5_KPASSWD_SUCCESS, 416 "Password changed"); 417out: 418 free_ChangePasswdDataMS(&chpw); 419 if (admin) 420 free(admin); 421 if (client) 422 free(client); 423 if (pwd_data) 424 krb5_free_data(context, pwd_data); 425 if (kadm5_handle) 426 kadm5_destroy (kadm5_handle); 427} 428 429static int 430verify (krb5_auth_context *auth_context, 431 krb5_realm *realms, 432 krb5_keytab keytab, 433 krb5_ticket **ticket, 434 krb5_data *out_data, 435 uint16_t *version, 436 int s, 437 struct sockaddr *sa, 438 int sa_size, 439 u_char *msg, 440 size_t len) 441{ 442 krb5_error_code ret; 443 uint16_t pkt_len, pkt_ver, ap_req_len; 444 krb5_data ap_req_data; 445 krb5_data krb_priv_data; 446 krb5_realm *r; 447 448 pkt_len = (msg[0] << 8) | (msg[1]); 449 pkt_ver = (msg[2] << 8) | (msg[3]); 450 ap_req_len = (msg[4] << 8) | (msg[5]); 451 if (pkt_len != len) { 452 krb5_warnx (context, "Strange len: %ld != %ld", 453 (long)pkt_len, (long)len); 454 reply_error (NULL, s, sa, sa_size, 0, 1, "Bad request"); 455 return 1; 456 } 457 if (pkt_ver != KRB5_KPASSWD_VERS_CHANGEPW && 458 pkt_ver != KRB5_KPASSWD_VERS_SETPW) { 459 krb5_warnx (context, "Bad version (%d)", pkt_ver); 460 reply_error (NULL, s, sa, sa_size, 0, 1, "Wrong program version"); 461 return 1; 462 } 463 *version = pkt_ver; 464 465 ap_req_data.data = msg + 6; 466 ap_req_data.length = ap_req_len; 467 468 ret = krb5_rd_req (context, 469 auth_context, 470 &ap_req_data, 471 NULL, 472 keytab, 473 NULL, 474 ticket); 475 if (ret) { 476 krb5_warn (context, ret, "krb5_rd_req"); 477 reply_error (NULL, s, sa, sa_size, ret, 3, "Authentication failed"); 478 return 1; 479 } 480 481 /* verify realm and principal */ 482 for (r = realms; *r != NULL; r++) { 483 krb5_principal principal; 484 krb5_boolean same; 485 486 ret = krb5_make_principal (context, 487 &principal, 488 *r, 489 "kadmin", 490 "changepw", 491 NULL); 492 if (ret) 493 krb5_err (context, 1, ret, "krb5_make_principal"); 494 495 same = krb5_principal_compare(context, principal, (*ticket)->server); 496 krb5_free_principal(context, principal); 497 if (same == TRUE) 498 break; 499 } 500 if (*r == NULL) { 501 char *str; 502 krb5_unparse_name(context, (*ticket)->server, &str); 503 krb5_warnx (context, "client used not valid principal %s", str); 504 free(str); 505 reply_error (NULL, s, sa, sa_size, ret, 1, 506 "Bad request"); 507 goto out; 508 } 509 510 if (strcmp((*ticket)->server->realm, (*ticket)->client->realm) != 0) { 511 krb5_warnx (context, "server realm (%s) not same a client realm (%s)", 512 (*ticket)->server->realm, (*ticket)->client->realm); 513 reply_error ((*ticket)->server->realm, s, sa, sa_size, ret, 1, 514 "Bad request"); 515 goto out; 516 } 517 518 if (!(*ticket)->ticket.flags.initial) { 519 krb5_warnx (context, "initial flag not set"); 520 reply_error ((*ticket)->server->realm, s, sa, sa_size, ret, 1, 521 "Bad request"); 522 goto out; 523 } 524 krb_priv_data.data = msg + 6 + ap_req_len; 525 krb_priv_data.length = len - 6 - ap_req_len; 526 527 ret = krb5_rd_priv (context, 528 *auth_context, 529 &krb_priv_data, 530 out_data, 531 NULL); 532 533 if (ret) { 534 krb5_warn (context, ret, "krb5_rd_priv"); 535 reply_error ((*ticket)->server->realm, s, sa, sa_size, ret, 3, 536 "Bad request"); 537 goto out; 538 } 539 return 0; 540out: 541 krb5_free_ticket (context, *ticket); 542 ticket = NULL; 543 return 1; 544} 545 546static void 547process (krb5_realm *realms, 548 krb5_keytab keytab, 549 int s, 550 krb5_address *this_addr, 551 struct sockaddr *sa, 552 int sa_size, 553 u_char *msg, 554 int len) 555{ 556 krb5_error_code ret; 557 krb5_auth_context auth_context = NULL; 558 krb5_data out_data; 559 krb5_ticket *ticket; 560 krb5_address other_addr; 561 uint16_t version; 562 563 564 krb5_data_zero (&out_data); 565 566 ret = krb5_auth_con_init (context, &auth_context); 567 if (ret) { 568 krb5_warn (context, ret, "krb5_auth_con_init"); 569 return; 570 } 571 572 krb5_auth_con_setflags (context, auth_context, 573 KRB5_AUTH_CONTEXT_DO_SEQUENCE); 574 575 ret = krb5_sockaddr2address (context, sa, &other_addr); 576 if (ret) { 577 krb5_warn (context, ret, "krb5_sockaddr2address"); 578 goto out; 579 } 580 581 ret = krb5_auth_con_setaddrs (context, 582 auth_context, 583 this_addr, 584 &other_addr); 585 krb5_free_address (context, &other_addr); 586 if (ret) { 587 krb5_warn (context, ret, "krb5_auth_con_setaddr"); 588 goto out; 589 } 590 591 if (verify (&auth_context, realms, keytab, &ticket, &out_data, 592 &version, s, sa, sa_size, msg, len) == 0) { 593 change (auth_context, 594 ticket->client, 595 version, 596 s, 597 sa, sa_size, 598 &out_data); 599 memset (out_data.data, 0, out_data.length); 600 krb5_free_ticket (context, ticket); 601 } 602 603out: 604 krb5_data_free (&out_data); 605 krb5_auth_con_free (context, auth_context); 606} 607 608static int 609doit (krb5_keytab keytab, int port) 610{ 611 krb5_error_code ret; 612 int *sockets; 613 int maxfd; 614 krb5_realm *realms; 615 krb5_addresses addrs; 616 unsigned n, i; 617 fd_set real_fdset; 618 struct sockaddr_storage __ss; 619 struct sockaddr *sa = (struct sockaddr *)&__ss; 620 621 ret = krb5_get_default_realms(context, &realms); 622 if (ret) 623 krb5_err (context, 1, ret, "krb5_get_default_realms"); 624 625 if (explicit_addresses.len) { 626 addrs = explicit_addresses; 627 } else { 628 ret = krb5_get_all_server_addrs (context, &addrs); 629 if (ret) 630 krb5_err (context, 1, ret, "krb5_get_all_server_addrs"); 631 } 632 n = addrs.len; 633 634 sockets = malloc (n * sizeof(*sockets)); 635 if (sockets == NULL) 636 krb5_errx (context, 1, "out of memory"); 637 maxfd = -1; 638 FD_ZERO(&real_fdset); 639 for (i = 0; i < n; ++i) { 640 krb5_socklen_t sa_size = sizeof(__ss); 641 642 krb5_addr2sockaddr (context, &addrs.val[i], sa, &sa_size, port); 643 644 sockets[i] = socket (sa->sa_family, SOCK_DGRAM, 0); 645 if (sockets[i] < 0) 646 krb5_err (context, 1, errno, "socket"); 647 if (bind (sockets[i], sa, sa_size) < 0) { 648 char str[128]; 649 size_t len; 650 int save_errno = errno; 651 652 ret = krb5_print_address (&addrs.val[i], str, sizeof(str), &len); 653 if (ret) 654 strlcpy(str, "unknown address", sizeof(str)); 655 krb5_warn (context, save_errno, "bind(%s)", str); 656 continue; 657 } 658 maxfd = max (maxfd, sockets[i]); 659 if (maxfd >= FD_SETSIZE) 660 krb5_errx (context, 1, "fd too large"); 661 FD_SET(sockets[i], &real_fdset); 662 } 663 if (maxfd == -1) 664 krb5_errx (context, 1, "No sockets!"); 665 666 while(exit_flag == 0) { 667 int ret; 668 fd_set fdset = real_fdset; 669 670 ret = select (maxfd + 1, &fdset, NULL, NULL, NULL); 671 if (ret < 0) { 672 if (errno == EINTR) 673 continue; 674 else 675 krb5_err (context, 1, errno, "select"); 676 } 677 for (i = 0; i < n; ++i) 678 if (FD_ISSET(sockets[i], &fdset)) { 679 u_char buf[BUFSIZ]; 680 socklen_t addrlen = sizeof(__ss); 681 682 ret = recvfrom (sockets[i], buf, sizeof(buf), 0, 683 sa, &addrlen); 684 if (ret < 0) { 685 if(errno == EINTR) 686 break; 687 else 688 krb5_err (context, 1, errno, "recvfrom"); 689 } 690 691 process (realms, keytab, sockets[i], 692 &addrs.val[i], 693 sa, addrlen, 694 buf, ret); 695 } 696 } 697 698 for (i = 0; i < n; ++i) 699 close(sockets[i]); 700 free(sockets); 701 702 krb5_free_addresses (context, &addrs); 703 krb5_free_host_realm (context, realms); 704 krb5_free_context (context); 705 return 0; 706} 707 708static RETSIGTYPE 709sigterm(int sig) 710{ 711 exit_flag = 1; 712} 713 714static const char *check_library = NULL; 715static const char *check_function = NULL; 716static getarg_strings policy_libraries = { 0, NULL }; 717static char *keytab_str = "HDB:"; 718static char *realm_str; 719static int version_flag; 720static int help_flag; 721static char *port_str; 722static char *config_file; 723 724struct getargs args[] = { 725#ifdef HAVE_DLOPEN 726 { "check-library", 0, arg_string, &check_library, 727 "library to load password check function from", "library" }, 728 { "check-function", 0, arg_string, &check_function, 729 "password check function to load", "function" }, 730 { "policy-libraries", 0, arg_strings, &policy_libraries, 731 "password check function to load", "function" }, 732#endif 733 { "addresses", 0, arg_strings, &addresses_str, 734 "addresses to listen on", "list of addresses" }, 735 { "keytab", 'k', arg_string, &keytab_str, 736 "keytab to get authentication key from", "kspec" }, 737 { "config-file", 'c', arg_string, &config_file }, 738 { "realm", 'r', arg_string, &realm_str, "default realm", "realm" }, 739 { "port", 'p', arg_string, &port_str, "port" }, 740 { "version", 0, arg_flag, &version_flag }, 741 { "help", 0, arg_flag, &help_flag } 742}; 743int num_args = sizeof(args) / sizeof(args[0]); 744 745int 746main (int argc, char **argv) 747{ 748 int optind; 749 krb5_keytab keytab; 750 krb5_error_code ret; 751 char **files; 752 int port, i; 753 754 optind = krb5_program_setup(&context, argc, argv, args, num_args, NULL); 755 756 if(help_flag) 757 krb5_std_usage(0, args, num_args); 758 if(version_flag) { 759 print_version(NULL); 760 exit(0); 761 } 762 763 if (config_file == NULL) { 764 asprintf(&config_file, "%s/kdc.conf", hdb_db_dir(context)); 765 if (config_file == NULL) 766 errx(1, "out of memory"); 767 } 768 769 ret = krb5_prepend_config_files_default(config_file, &files); 770 if (ret) 771 krb5_err(context, 1, ret, "getting configuration files"); 772 773 ret = krb5_set_config_files(context, files); 774 krb5_free_config_files(files); 775 if (ret) 776 krb5_err(context, 1, ret, "reading configuration files"); 777 778 if(realm_str) 779 krb5_set_default_realm(context, realm_str); 780 781 krb5_openlog (context, "kpasswdd", &log_facility); 782 krb5_set_warn_dest(context, log_facility); 783 784 if (port_str != NULL) { 785 struct servent *s = roken_getservbyname (port_str, "udp"); 786 787 if (s != NULL) 788 port = s->s_port; 789 else { 790 char *ptr; 791 792 port = strtol (port_str, &ptr, 10); 793 if (port == 0 && ptr == port_str) 794 krb5_errx (context, 1, "bad port `%s'", port_str); 795 port = htons(port); 796 } 797 } else 798 port = krb5_getportbyname (context, "kpasswd", "udp", KPASSWD_PORT); 799 800 ret = krb5_kt_register(context, &hdb_kt_ops); 801 if(ret) 802 krb5_err(context, 1, ret, "krb5_kt_register"); 803 804 ret = krb5_kt_resolve(context, keytab_str, &keytab); 805 if(ret) 806 krb5_err(context, 1, ret, "%s", keytab_str); 807 808 kadm5_setup_passwd_quality_check (context, check_library, check_function); 809 810 for (i = 0; i < policy_libraries.num_strings; i++) { 811 ret = kadm5_add_passwd_quality_verifier(context, 812 policy_libraries.strings[i]); 813 if (ret) 814 krb5_err(context, 1, ret, "kadm5_add_passwd_quality_verifier"); 815 } 816 ret = kadm5_add_passwd_quality_verifier(context, NULL); 817 if (ret) 818 krb5_err(context, 1, ret, "kadm5_add_passwd_quality_verifier"); 819 820 821 explicit_addresses.len = 0; 822 823 if (addresses_str.num_strings) { 824 int i; 825 826 for (i = 0; i < addresses_str.num_strings; ++i) 827 add_one_address (addresses_str.strings[i], i == 0); 828 free_getarg_strings (&addresses_str); 829 } else { 830 char **foo = krb5_config_get_strings (context, NULL, 831 "kdc", "addresses", NULL); 832 833 if (foo != NULL) { 834 add_one_address (*foo++, TRUE); 835 while (*foo) 836 add_one_address (*foo++, FALSE); 837 } 838 } 839 840#ifdef HAVE_SIGACTION 841 { 842 struct sigaction sa; 843 844 sa.sa_flags = 0; 845 sa.sa_handler = sigterm; 846 sigemptyset(&sa.sa_mask); 847 848 sigaction(SIGINT, &sa, NULL); 849 sigaction(SIGTERM, &sa, NULL); 850 } 851#else 852 signal(SIGINT, sigterm); 853 signal(SIGTERM, sigterm); 854#endif 855 856 pidfile(NULL); 857 858 return doit (keytab, port); 859} 860