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 1.90.4.1 2003/05/08 18:58:37 lha 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 int do_afslog = -1; 56 #ifdef KRB4 57 int get_v4_tgt = -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 #endif 70 { "afslog", 0 , arg_flag, &do_afslog, 71 "obtain afs tokens" }, 72 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 if(ret == 0 && server == NULL) { 374 #ifdef KRB4 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 #endif 379 if(do_afslog && k_hasafs()) 380 krb5_afslog(context, cache, NULL, NULL); 381 } 382 383 krb5_free_creds (context, out); 384 if(ret) { 385 krb5_warn(context, ret, "krb5_cc_store_cred"); 386 goto out; 387 } 388 out: 389 krb5_free_creds_contents(context, &in); 390 return ret; 391 } 392 393 static krb5_error_code 394 get_new_tickets(krb5_context context, 395 krb5_principal principal, 396 krb5_ccache ccache, 397 krb5_deltat ticket_life) 398 { 399 krb5_error_code ret; 400 krb5_get_init_creds_opt opt; 401 krb5_addresses no_addrs; 402 krb5_creds cred; 403 char passwd[256]; 404 krb5_deltat start_time = 0; 405 krb5_deltat renew = 0; 406 407 memset(&cred, 0, sizeof(cred)); 408 409 krb5_get_init_creds_opt_init (&opt); 410 411 krb5_get_init_creds_opt_set_default_flags(context, "kinit", 412 /* XXX */principal->realm, &opt); 413 414 if(forwardable_flag != -1) 415 krb5_get_init_creds_opt_set_forwardable (&opt, forwardable_flag); 416 if(proxiable_flag != -1) 417 krb5_get_init_creds_opt_set_proxiable (&opt, proxiable_flag); 418 if(anonymous_flag != -1) 419 krb5_get_init_creds_opt_set_anonymous (&opt, anonymous_flag); 420 421 if (!addrs_flag) { 422 no_addrs.len = 0; 423 no_addrs.val = NULL; 424 425 krb5_get_init_creds_opt_set_address_list (&opt, &no_addrs); 426 } 427 428 if(renew_life) { 429 renew = parse_time (renew_life, "s"); 430 if (renew < 0) 431 errx (1, "unparsable time: %s", renew_life); 432 433 krb5_get_init_creds_opt_set_renew_life (&opt, renew); 434 } else if (renewable_flag == 1) 435 krb5_get_init_creds_opt_set_renew_life (&opt, 1 << 30); 436 437 438 if(ticket_life != 0) 439 krb5_get_init_creds_opt_set_tkt_life (&opt, ticket_life); 440 441 if(start_str) { 442 int tmp = parse_time (start_str, "s"); 443 if (tmp < 0) 444 errx (1, "unparsable time: %s", start_str); 445 446 start_time = tmp; 447 } 448 449 if(etype_str.num_strings) { 450 krb5_enctype *enctype = NULL; 451 int i; 452 enctype = malloc(etype_str.num_strings * sizeof(*enctype)); 453 if(enctype == NULL) 454 errx(1, "out of memory"); 455 for(i = 0; i < etype_str.num_strings; i++) { 456 ret = krb5_string_to_enctype(context, 457 etype_str.strings[i], 458 &enctype[i]); 459 if(ret) 460 errx(1, "unrecognized enctype: %s", etype_str.strings[i]); 461 } 462 krb5_get_init_creds_opt_set_etype_list(&opt, enctype, 463 etype_str.num_strings); 464 } 465 466 if(use_keytab || keytab_str) { 467 krb5_keytab kt; 468 if(keytab_str) 469 ret = krb5_kt_resolve(context, keytab_str, &kt); 470 else 471 ret = krb5_kt_default(context, &kt); 472 if (ret) 473 krb5_err (context, 1, ret, "resolving keytab"); 474 ret = krb5_get_init_creds_keytab (context, 475 &cred, 476 principal, 477 kt, 478 start_time, 479 server, 480 &opt); 481 krb5_kt_close(context, kt); 482 } else { 483 char *p, *prompt; 484 485 krb5_unparse_name (context, principal, &p); 486 asprintf (&prompt, "%s's Password: ", p); 487 free (p); 488 489 if (des_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){ 490 memset(passwd, 0, sizeof(passwd)); 491 exit(1); 492 } 493 494 free (prompt); 495 496 ret = krb5_get_init_creds_password (context, 497 &cred, 498 principal, 499 passwd, 500 krb5_prompter_posix, 501 NULL, 502 start_time, 503 server, 504 &opt); 505 } 506 #ifdef KRB4 507 if (ret == KRB5KRB_AP_ERR_V4_REPLY || ret == KRB5_KDC_UNREACH) { 508 int exit_val; 509 510 exit_val = do_v4_fallback (context, principal, ticket_life, 511 use_keytab, keytab_str, passwd); 512 get_v4_tgt = 0; 513 do_afslog = 0; 514 memset(passwd, 0, sizeof(passwd)); 515 if (exit_val == 0 || ret == KRB5KRB_AP_ERR_V4_REPLY) 516 return exit_val; 517 } 518 #endif 519 memset(passwd, 0, sizeof(passwd)); 520 521 switch(ret){ 522 case 0: 523 break; 524 case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */ 525 exit(1); 526 case KRB5KRB_AP_ERR_BAD_INTEGRITY: 527 case KRB5KRB_AP_ERR_MODIFIED: 528 krb5_errx(context, 1, "Password incorrect"); 529 break; 530 default: 531 krb5_err(context, 1, ret, "krb5_get_init_creds"); 532 } 533 534 if(ticket_life != 0) { 535 if(abs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) { 536 char life[32]; 537 unparse_time(cred.times.endtime - cred.times.starttime, 538 life, sizeof(life)); 539 krb5_warnx(context, "NOTICE: ticket lifetime is %s", life); 540 } 541 } 542 if(renew != 0) { 543 if(abs(cred.times.renew_till - cred.times.starttime - renew) > 30) { 544 char life[32]; 545 unparse_time(cred.times.renew_till - cred.times.starttime, 546 life, sizeof(life)); 547 krb5_warnx(context, "NOTICE: ticket renewable lifetime is %s", 548 life); 549 } 550 } 551 552 ret = krb5_cc_initialize (context, ccache, cred.client); 553 if (ret) 554 krb5_err (context, 1, ret, "krb5_cc_initialize"); 555 556 ret = krb5_cc_store_cred (context, ccache, &cred); 557 if (ret) 558 krb5_err (context, 1, ret, "krb5_cc_store_cred"); 559 560 krb5_free_creds_contents (context, &cred); 561 562 return 0; 563 } 564 565 int 566 main (int argc, char **argv) 567 { 568 krb5_error_code ret; 569 krb5_context context; 570 krb5_ccache ccache; 571 krb5_principal principal; 572 int optind = 0; 573 krb5_deltat ticket_life = 0; 574 575 setprogname (argv[0]); 576 577 ret = krb5_init_context (&context); 578 if (ret) 579 errx(1, "krb5_init_context failed: %d", ret); 580 581 if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optind)) 582 usage(1); 583 584 if (help_flag) 585 usage (0); 586 587 if(version_flag) { 588 print_version(NULL); 589 exit(0); 590 } 591 592 argc -= optind; 593 argv += optind; 594 595 if (argv[0]) { 596 ret = krb5_parse_name (context, argv[0], &principal); 597 if (ret) 598 krb5_err (context, 1, ret, "krb5_parse_name"); 599 } else { 600 ret = kinit_get_default_principal (context, &principal); 601 if (ret) 602 krb5_err (context, 1, ret, "krb5_get_default_principal"); 603 } 604 605 if(fcache_version) 606 krb5_set_fcache_version(context, fcache_version); 607 608 if(cred_cache) 609 ret = krb5_cc_resolve(context, cred_cache, &ccache); 610 else { 611 if(argc > 1) { 612 char s[1024]; 613 ret = krb5_cc_gen_new(context, &krb5_fcc_ops, &ccache); 614 if(ret) 615 krb5_err(context, 1, ret, "creating cred cache"); 616 snprintf(s, sizeof(s), "%s:%s", 617 krb5_cc_get_type(context, ccache), 618 krb5_cc_get_name(context, ccache)); 619 setenv("KRB5CCNAME", s, 1); 620 #ifdef KRB4 621 { 622 int fd; 623 snprintf(s, sizeof(s), "%s_XXXXXX", TKT_ROOT); 624 if((fd = mkstemp(s)) >= 0) { 625 close(fd); 626 setenv("KRBTKFILE", s, 1); 627 if (k_hasafs ()) 628 k_setpag(); 629 } 630 } 631 #endif 632 } else 633 ret = krb5_cc_default (context, &ccache); 634 } 635 if (ret) 636 krb5_err (context, 1, ret, "resolving credentials cache"); 637 638 if (lifetime) { 639 int tmp = parse_time (lifetime, "s"); 640 if (tmp < 0) 641 errx (1, "unparsable time: %s", lifetime); 642 643 ticket_life = tmp; 644 } 645 #ifdef KRB4 646 if(get_v4_tgt == -1) 647 krb5_appdefault_boolean(context, "kinit", 648 krb5_principal_get_realm(context, principal), 649 "krb4_get_tickets", TRUE, &get_v4_tgt); 650 #endif 651 if(do_afslog == -1) 652 krb5_appdefault_boolean(context, "kinit", 653 krb5_principal_get_realm(context, principal), 654 "afslog", TRUE, &do_afslog); 655 656 if(!addrs_flag && extra_addresses.num_strings > 0) 657 krb5_errx(context, 1, "specifying both extra addresses and " 658 "no addresses makes no sense"); 659 { 660 int i; 661 krb5_addresses addresses; 662 memset(&addresses, 0, sizeof(addresses)); 663 for(i = 0; i < extra_addresses.num_strings; i++) { 664 ret = krb5_parse_address(context, extra_addresses.strings[i], 665 &addresses); 666 if (ret == 0) { 667 krb5_add_extra_addresses(context, &addresses); 668 krb5_free_addresses(context, &addresses); 669 } 670 } 671 free_getarg_strings(&extra_addresses); 672 } 673 674 675 if(renew_flag || validate_flag) { 676 ret = renew_validate(context, renew_flag, validate_flag, 677 ccache, server, ticket_life); 678 exit(ret != 0); 679 } 680 681 #ifdef KRB4 682 if(!convert_524) 683 #endif 684 get_new_tickets(context, principal, ccache, ticket_life); 685 686 #ifdef KRB4 687 if(get_v4_tgt) 688 do_524init(context, ccache, NULL, server); 689 #endif 690 if(do_afslog && k_hasafs()) 691 krb5_afslog(context, ccache, NULL, NULL); 692 if(argc > 1) { 693 simple_execvp(argv[1], argv+1); 694 krb5_cc_destroy(context, ccache); 695 #ifdef KRB4 696 dest_tkt(); 697 #endif 698 if(k_hasafs()) 699 k_unlog(); 700 } else 701 krb5_cc_close (context, ccache); 702 krb5_free_principal(context, principal); 703 krb5_free_context (context); 704 return 0; 705 } 706