1 /* 2 * Copyright (c) 1997-2002 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 "kuser_locl.h" 35 RCSID("$Id: kinit.c,v 1.90 2002/09/09 22:17:53 joda Exp $"); 36 37 int forwardable_flag = -1; 38 int proxiable_flag = -1; 39 int renewable_flag = -1; 40 int renew_flag = 0; 41 int validate_flag = 0; 42 int version_flag = 0; 43 int help_flag = 0; 44 int addrs_flag = 1; 45 struct getarg_strings extra_addresses; 46 int anonymous_flag = 0; 47 char *lifetime = NULL; 48 char *renew_life = NULL; 49 char *server = NULL; 50 char *cred_cache = NULL; 51 char *start_str = NULL; 52 struct getarg_strings etype_str; 53 int use_keytab = 0; 54 char *keytab_str = NULL; 55 #ifdef KRB4 56 int get_v4_tgt = -1; 57 int do_afslog = -1; 58 int convert_524; 59 #endif 60 int fcache_version; 61 62 static struct getargs args[] = { 63 #ifdef KRB4 64 { "524init", '4', arg_flag, &get_v4_tgt, 65 "obtain version 4 TGT" }, 66 67 { "524convert", '9', arg_flag, &convert_524, 68 "only convert ticket to version 4" }, 69 70 { "afslog", 0 , arg_flag, &do_afslog, 71 "obtain afs tokens" }, 72 #endif 73 { "cache", 'c', arg_string, &cred_cache, 74 "credentials cache", "cachename" }, 75 76 { "forwardable", 'f', arg_flag, &forwardable_flag, 77 "get forwardable tickets"}, 78 79 { "keytab", 't', arg_string, &keytab_str, 80 "keytab to use", "keytabname" }, 81 82 { "lifetime", 'l', arg_string, &lifetime, 83 "lifetime of tickets", "time"}, 84 85 { "proxiable", 'p', arg_flag, &proxiable_flag, 86 "get proxiable tickets" }, 87 88 { "renew", 'R', arg_flag, &renew_flag, 89 "renew TGT" }, 90 91 { "renewable", 0, arg_flag, &renewable_flag, 92 "get renewable tickets" }, 93 94 { "renewable-life", 'r', arg_string, &renew_life, 95 "renewable lifetime of tickets", "time" }, 96 97 { "server", 'S', arg_string, &server, 98 "server to get ticket for", "principal" }, 99 100 { "start-time", 's', arg_string, &start_str, 101 "when ticket gets valid", "time" }, 102 103 { "use-keytab", 'k', arg_flag, &use_keytab, 104 "get key from keytab" }, 105 106 { "validate", 'v', arg_flag, &validate_flag, 107 "validate TGT" }, 108 109 { "enctypes", 'e', arg_strings, &etype_str, 110 "encryption types to use", "enctypes" }, 111 112 { "fcache-version", 0, arg_integer, &fcache_version, 113 "file cache version to create" }, 114 115 { "addresses", 0, arg_negative_flag, &addrs_flag, 116 "request a ticket with no addresses" }, 117 118 { "extra-addresses",'a', arg_strings, &extra_addresses, 119 "include these extra addresses", "addresses" }, 120 121 { "anonymous", 0, arg_flag, &anonymous_flag, 122 "request an anonymous ticket" }, 123 124 { "version", 0, arg_flag, &version_flag }, 125 { "help", 0, arg_flag, &help_flag } 126 }; 127 128 static void 129 usage (int ret) 130 { 131 arg_printusage (args, 132 sizeof(args)/sizeof(*args), 133 NULL, 134 "[principal [command]]"); 135 exit (ret); 136 } 137 138 #ifdef KRB4 139 /* for when the KDC tells us it's a v4 one, we try to talk that */ 140 141 static int 142 key_to_key(const char *user, 143 char *instance, 144 const char *realm, 145 const void *arg, 146 des_cblock *key) 147 { 148 memcpy(key, arg, sizeof(des_cblock)); 149 return 0; 150 } 151 152 static int 153 do_v4_fallback (krb5_context context, 154 const krb5_principal principal, 155 int lifetime, 156 int use_srvtab, const char *srvtab_str, 157 const char *passwd) 158 { 159 int ret; 160 krb_principal princ; 161 des_cblock key; 162 krb5_error_code kret; 163 164 if (lifetime == 0) 165 lifetime = DEFAULT_TKT_LIFE; 166 else 167 lifetime = krb_time_to_life (0, lifetime); 168 169 kret = krb5_524_conv_principal (context, principal, 170 princ.name, 171 princ.instance, 172 princ.realm); 173 if (kret) { 174 krb5_warn (context, kret, "krb5_524_conv_principal"); 175 return 1; 176 } 177 178 if (use_srvtab || srvtab_str) { 179 if (srvtab_str == NULL) 180 srvtab_str = KEYFILE; 181 182 ret = read_service_key (princ.name, princ.instance, princ.realm, 183 0, srvtab_str, (char *)&key); 184 if (ret) { 185 warnx ("read_service_key %s: %s", srvtab_str, 186 krb_get_err_text (ret)); 187 return 1; 188 } 189 ret = krb_get_in_tkt (princ.name, princ.instance, princ.realm, 190 KRB_TICKET_GRANTING_TICKET, princ.realm, 191 lifetime, key_to_key, NULL, key); 192 } else { 193 ret = krb_get_pw_in_tkt(princ.name, princ.instance, princ.realm, 194 KRB_TICKET_GRANTING_TICKET, princ.realm, 195 lifetime, passwd); 196 } 197 memset (key, 0, sizeof(key)); 198 if (ret) { 199 warnx ("%s", krb_get_err_text(ret)); 200 return 1; 201 } 202 if (do_afslog && k_hasafs()) { 203 if ((ret = krb_afslog(NULL, NULL)) != 0 && ret != KDC_PR_UNKNOWN) { 204 if(ret > 0) 205 warnx ("%s", krb_get_err_text(ret)); 206 else 207 warnx ("failed to store AFS token"); 208 } 209 } 210 return 0; 211 } 212 213 214 /* 215 * the special version of get_default_principal that takes v4 into account 216 */ 217 218 static krb5_error_code 219 kinit_get_default_principal (krb5_context context, 220 krb5_principal *princ) 221 { 222 krb5_error_code ret; 223 krb5_ccache id; 224 krb_principal v4_princ; 225 int kret; 226 227 ret = krb5_cc_default (context, &id); 228 if (ret == 0) { 229 ret = krb5_cc_get_principal (context, id, princ); 230 krb5_cc_close (context, id); 231 if (ret == 0) 232 return 0; 233 } 234 235 kret = krb_get_tf_fullname (tkt_string(), 236 v4_princ.name, 237 v4_princ.instance, 238 v4_princ.realm); 239 if (kret == KSUCCESS) { 240 ret = krb5_425_conv_principal (context, 241 v4_princ.name, 242 v4_princ.instance, 243 v4_princ.realm, 244 princ); 245 if (ret == 0) 246 return 0; 247 } 248 return krb5_get_default_principal (context, princ); 249 } 250 251 #else /* !KRB4 */ 252 253 static krb5_error_code 254 kinit_get_default_principal (krb5_context context, 255 krb5_principal *princ) 256 { 257 return krb5_get_default_principal (context, princ); 258 } 259 260 #endif /* !KRB4 */ 261 262 static krb5_error_code 263 get_server(krb5_context context, 264 krb5_principal client, 265 const char *server, 266 krb5_principal *princ) 267 { 268 krb5_realm *client_realm; 269 if(server) 270 return krb5_parse_name(context, server, princ); 271 272 client_realm = krb5_princ_realm (context, client); 273 return krb5_make_principal(context, princ, *client_realm, 274 KRB5_TGS_NAME, *client_realm, NULL); 275 } 276 277 #ifdef KRB4 278 static krb5_error_code 279 do_524init(krb5_context context, krb5_ccache ccache, 280 krb5_creds *creds, const char *server) 281 { 282 krb5_error_code ret; 283 CREDENTIALS c; 284 krb5_creds in_creds, *real_creds; 285 286 if(creds != NULL) 287 real_creds = creds; 288 else { 289 krb5_principal client; 290 krb5_cc_get_principal(context, ccache, &client); 291 memset(&in_creds, 0, sizeof(in_creds)); 292 ret = get_server(context, client, server, &in_creds.server); 293 krb5_free_principal(context, client); 294 if(ret) 295 return ret; 296 ret = krb5_get_credentials(context, 0, ccache, &in_creds, &real_creds); 297 krb5_free_principal(context, in_creds.server); 298 if(ret) 299 return ret; 300 } 301 ret = krb524_convert_creds_kdc_ccache(context, ccache, real_creds, &c); 302 if(ret) 303 krb5_warn(context, ret, "converting creds"); 304 else { 305 int tret = tf_setup(&c, c.pname, c.pinst); 306 if(tret) 307 krb5_warnx(context, "saving v4 creds: %s", krb_get_err_text(tret)); 308 } 309 310 if(creds == NULL) 311 krb5_free_creds(context, real_creds); 312 memset(&c, 0, sizeof(c)); 313 314 return ret; 315 } 316 #endif 317 318 static int 319 renew_validate(krb5_context context, 320 int renew, 321 int validate, 322 krb5_ccache cache, 323 const char *server, 324 krb5_deltat life) 325 { 326 krb5_error_code ret; 327 krb5_creds in, *out; 328 krb5_kdc_flags flags; 329 330 memset(&in, 0, sizeof(in)); 331 332 ret = krb5_cc_get_principal(context, cache, &in.client); 333 if(ret) { 334 krb5_warn(context, ret, "krb5_cc_get_principal"); 335 return ret; 336 } 337 ret = get_server(context, in.client, server, &in.server); 338 if(ret) { 339 krb5_warn(context, ret, "get_server"); 340 goto out; 341 } 342 flags.i = 0; 343 flags.b.renewable = flags.b.renew = renew; 344 flags.b.validate = validate; 345 if (forwardable_flag != -1) 346 flags.b.forwardable = forwardable_flag; 347 if (proxiable_flag != -1) 348 flags.b.proxiable = proxiable_flag; 349 if (anonymous_flag != -1) 350 flags.b.request_anonymous = anonymous_flag; 351 if(life) 352 in.times.endtime = time(NULL) + life; 353 354 ret = krb5_get_kdc_cred(context, 355 cache, 356 flags, 357 NULL, 358 NULL, 359 &in, 360 &out); 361 if(ret) { 362 krb5_warn(context, ret, "krb5_get_kdc_cred"); 363 goto out; 364 } 365 ret = krb5_cc_initialize(context, cache, in.client); 366 if(ret) { 367 krb5_free_creds (context, out); 368 krb5_warn(context, ret, "krb5_cc_initialize"); 369 goto out; 370 } 371 ret = krb5_cc_store_cred(context, cache, out); 372 373 #ifdef KRB4 374 if(ret == 0 && server == NULL) { 375 /* only do this if it's a general renew-my-tgt request */ 376 if(get_v4_tgt) 377 do_524init(context, cache, out, NULL); 378 379 if(do_afslog && k_hasafs()) 380 krb5_afslog(context, cache, NULL, NULL); 381 } 382 #endif 383 384 krb5_free_creds (context, out); 385 if(ret) { 386 krb5_warn(context, ret, "krb5_cc_store_cred"); 387 goto out; 388 } 389 out: 390 krb5_free_creds_contents(context, &in); 391 return ret; 392 } 393 394 static krb5_error_code 395 get_new_tickets(krb5_context context, 396 krb5_principal principal, 397 krb5_ccache ccache, 398 krb5_deltat ticket_life) 399 { 400 krb5_error_code ret; 401 krb5_get_init_creds_opt opt; 402 krb5_addresses no_addrs; 403 krb5_creds cred; 404 char passwd[256]; 405 krb5_deltat start_time = 0; 406 krb5_deltat renew = 0; 407 408 memset(&cred, 0, sizeof(cred)); 409 410 krb5_get_init_creds_opt_init (&opt); 411 412 krb5_get_init_creds_opt_set_default_flags(context, "kinit", 413 /* XXX */principal->realm, &opt); 414 415 if(forwardable_flag != -1) 416 krb5_get_init_creds_opt_set_forwardable (&opt, forwardable_flag); 417 if(proxiable_flag != -1) 418 krb5_get_init_creds_opt_set_proxiable (&opt, proxiable_flag); 419 if(anonymous_flag != -1) 420 krb5_get_init_creds_opt_set_anonymous (&opt, anonymous_flag); 421 422 if (!addrs_flag) { 423 no_addrs.len = 0; 424 no_addrs.val = NULL; 425 426 krb5_get_init_creds_opt_set_address_list (&opt, &no_addrs); 427 } 428 429 if(renew_life) { 430 renew = parse_time (renew_life, "s"); 431 if (renew < 0) 432 errx (1, "unparsable time: %s", renew_life); 433 434 krb5_get_init_creds_opt_set_renew_life (&opt, renew); 435 } else if (renewable_flag == 1) 436 krb5_get_init_creds_opt_set_renew_life (&opt, 1 << 30); 437 438 439 if(ticket_life != 0) 440 krb5_get_init_creds_opt_set_tkt_life (&opt, ticket_life); 441 442 if(start_str) { 443 int tmp = parse_time (start_str, "s"); 444 if (tmp < 0) 445 errx (1, "unparsable time: %s", start_str); 446 447 start_time = tmp; 448 } 449 450 if(etype_str.num_strings) { 451 krb5_enctype *enctype = NULL; 452 int i; 453 enctype = malloc(etype_str.num_strings * sizeof(*enctype)); 454 if(enctype == NULL) 455 errx(1, "out of memory"); 456 for(i = 0; i < etype_str.num_strings; i++) { 457 ret = krb5_string_to_enctype(context, 458 etype_str.strings[i], 459 &enctype[i]); 460 if(ret) 461 errx(1, "unrecognized enctype: %s", etype_str.strings[i]); 462 } 463 krb5_get_init_creds_opt_set_etype_list(&opt, enctype, 464 etype_str.num_strings); 465 } 466 467 if(use_keytab || keytab_str) { 468 krb5_keytab kt; 469 if(keytab_str) 470 ret = krb5_kt_resolve(context, keytab_str, &kt); 471 else 472 ret = krb5_kt_default(context, &kt); 473 if (ret) 474 krb5_err (context, 1, ret, "resolving keytab"); 475 ret = krb5_get_init_creds_keytab (context, 476 &cred, 477 principal, 478 kt, 479 start_time, 480 server, 481 &opt); 482 krb5_kt_close(context, kt); 483 } else { 484 char *p, *prompt; 485 486 krb5_unparse_name (context, principal, &p); 487 asprintf (&prompt, "%s's Password: ", p); 488 free (p); 489 490 if (des_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){ 491 memset(passwd, 0, sizeof(passwd)); 492 exit(1); 493 } 494 495 free (prompt); 496 497 ret = krb5_get_init_creds_password (context, 498 &cred, 499 principal, 500 passwd, 501 krb5_prompter_posix, 502 NULL, 503 start_time, 504 server, 505 &opt); 506 } 507 #ifdef KRB4 508 if (ret == KRB5KRB_AP_ERR_V4_REPLY || ret == KRB5_KDC_UNREACH) { 509 int exit_val; 510 511 exit_val = do_v4_fallback (context, principal, ticket_life, 512 use_keytab, keytab_str, passwd); 513 get_v4_tgt = 0; 514 do_afslog = 0; 515 memset(passwd, 0, sizeof(passwd)); 516 if (exit_val == 0 || ret == KRB5KRB_AP_ERR_V4_REPLY) 517 return exit_val; 518 } 519 #endif 520 memset(passwd, 0, sizeof(passwd)); 521 522 switch(ret){ 523 case 0: 524 break; 525 case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */ 526 exit(1); 527 case KRB5KRB_AP_ERR_BAD_INTEGRITY: 528 case KRB5KRB_AP_ERR_MODIFIED: 529 krb5_errx(context, 1, "Password incorrect"); 530 break; 531 default: 532 krb5_err(context, 1, ret, "krb5_get_init_creds"); 533 } 534 535 if(ticket_life != 0) { 536 if(abs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) { 537 char life[32]; 538 unparse_time(cred.times.endtime - cred.times.starttime, 539 life, sizeof(life)); 540 krb5_warnx(context, "NOTICE: ticket lifetime is %s", life); 541 } 542 } 543 if(renew != 0) { 544 if(abs(cred.times.renew_till - cred.times.starttime - renew) > 30) { 545 char life[32]; 546 unparse_time(cred.times.renew_till - cred.times.starttime, 547 life, sizeof(life)); 548 krb5_warnx(context, "NOTICE: ticket renewable lifetime is %s", 549 life); 550 } 551 } 552 553 ret = krb5_cc_initialize (context, ccache, cred.client); 554 if (ret) 555 krb5_err (context, 1, ret, "krb5_cc_initialize"); 556 557 ret = krb5_cc_store_cred (context, ccache, &cred); 558 if (ret) 559 krb5_err (context, 1, ret, "krb5_cc_store_cred"); 560 561 krb5_free_creds_contents (context, &cred); 562 563 return 0; 564 } 565 566 int 567 main (int argc, char **argv) 568 { 569 krb5_error_code ret; 570 krb5_context context; 571 krb5_ccache ccache; 572 krb5_principal principal; 573 int optind = 0; 574 krb5_deltat ticket_life = 0; 575 576 setprogname (argv[0]); 577 578 ret = krb5_init_context (&context); 579 if (ret) 580 errx(1, "krb5_init_context failed: %d", ret); 581 582 if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optind)) 583 usage(1); 584 585 if (help_flag) 586 usage (0); 587 588 if(version_flag) { 589 print_version(NULL); 590 exit(0); 591 } 592 593 argc -= optind; 594 argv += optind; 595 596 if (argv[0]) { 597 ret = krb5_parse_name (context, argv[0], &principal); 598 if (ret) 599 krb5_err (context, 1, ret, "krb5_parse_name"); 600 } else { 601 ret = kinit_get_default_principal (context, &principal); 602 if (ret) 603 krb5_err (context, 1, ret, "krb5_get_default_principal"); 604 } 605 606 if(fcache_version) 607 krb5_set_fcache_version(context, fcache_version); 608 609 if(cred_cache) 610 ret = krb5_cc_resolve(context, cred_cache, &ccache); 611 else { 612 if(argc > 1) { 613 char s[1024]; 614 ret = krb5_cc_gen_new(context, &krb5_fcc_ops, &ccache); 615 if(ret) 616 krb5_err(context, 1, ret, "creating cred cache"); 617 snprintf(s, sizeof(s), "%s:%s", 618 krb5_cc_get_type(context, ccache), 619 krb5_cc_get_name(context, ccache)); 620 setenv("KRB5CCNAME", s, 1); 621 #ifdef KRB4 622 { 623 int fd; 624 snprintf(s, sizeof(s), "%s_XXXXXX", TKT_ROOT); 625 if((fd = mkstemp(s)) >= 0) { 626 close(fd); 627 setenv("KRBTKFILE", s, 1); 628 if (k_hasafs ()) 629 k_setpag(); 630 } 631 } 632 #endif 633 } else 634 ret = krb5_cc_default (context, &ccache); 635 } 636 if (ret) 637 krb5_err (context, 1, ret, "resolving credentials cache"); 638 639 if (lifetime) { 640 int tmp = parse_time (lifetime, "s"); 641 if (tmp < 0) 642 errx (1, "unparsable time: %s", lifetime); 643 644 ticket_life = tmp; 645 } 646 #ifdef KRB4 647 if(get_v4_tgt == -1) 648 krb5_appdefault_boolean(context, "kinit", 649 krb5_principal_get_realm(context, principal), 650 "krb4_get_tickets", TRUE, &get_v4_tgt); 651 if(do_afslog == -1) 652 krb5_appdefault_boolean(context, "kinit", 653 krb5_principal_get_realm(context, principal), 654 "afslog", TRUE, &do_afslog); 655 #endif 656 657 if(!addrs_flag && extra_addresses.num_strings > 0) 658 krb5_errx(context, 1, "specifying both extra addresses and " 659 "no addresses makes no sense"); 660 { 661 int i; 662 krb5_addresses addresses; 663 memset(&addresses, 0, sizeof(addresses)); 664 for(i = 0; i < extra_addresses.num_strings; i++) { 665 ret = krb5_parse_address(context, extra_addresses.strings[i], 666 &addresses); 667 if (ret == 0) { 668 krb5_add_extra_addresses(context, &addresses); 669 krb5_free_addresses(context, &addresses); 670 } 671 } 672 free_getarg_strings(&extra_addresses); 673 } 674 675 676 if(renew_flag || validate_flag) { 677 ret = renew_validate(context, renew_flag, validate_flag, 678 ccache, server, ticket_life); 679 exit(ret != 0); 680 } 681 682 #ifdef KRB4 683 if(!convert_524) 684 #endif 685 get_new_tickets(context, principal, ccache, ticket_life); 686 687 #ifdef KRB4 688 if(get_v4_tgt) 689 do_524init(context, ccache, NULL, server); 690 if(do_afslog && k_hasafs()) 691 krb5_afslog(context, ccache, NULL, NULL); 692 #endif 693 if(argc > 1) { 694 simple_execvp(argv[1], argv+1); 695 krb5_cc_destroy(context, ccache); 696 #ifdef KRB4 697 dest_tkt(); 698 if(k_hasafs()) 699 k_unlog(); 700 #endif 701 } else 702 krb5_cc_close (context, ccache); 703 krb5_free_principal(context, principal); 704 krb5_free_context (context); 705 return 0; 706 } 707