kuser/kinit.c

   1 /*
   2  * Copyright (c) 1997-2007 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "kuser_locl.h"
  37
  38 #ifdef __APPLE__
  39 #include <Security/Security.h>
  40 #endif
  41
  42 #ifndef NO_NTLM
  43 #include "heimntlm.h"
  44 #endif
  45
  46 #ifndef SIGINFO
  47 #define SIGINFO SIGUSR1
  48 #endif
  49
  50 int forwardable_flag    = -1;
  51 int proxiable_flag      = -1;
  52 int renewable_flag      = -1;
  53 int renew_flag          = 0;
  54 int pac_flag            = -1;
  55 int validate_flag       = 0;
  56 int version_flag        = 0;
  57 int help_flag           = 0;
  58 int addrs_flag          = -1;
  59 struct getarg_strings extra_addresses;
  60 int anonymous_flag      = 0;
  61 char *lifetime          = NULL;
  62 char *renew_life        = NULL;
  63 char *server_str        = NULL;
  64 char *cred_cache        = NULL;
  65 char *start_str         = NULL;
  66 static int switch_cache_flags = 1;
  67 struct getarg_strings etype_str;
  68 int use_keytab          = 0;
  69 char *keytab_str        = NULL;
  70 static krb5_keytab kt   = NULL;
  71 int do_afslog           = -1;
  72 int fcache_version;
  73 char *password_file     = NULL;
  74 char *pk_user_id        = NULL;
  75 int pk_enterprise_flag = 0;
  76 struct hx509_certs_data *ent_user_id = NULL;
  77 char *pk_x509_anchors   = NULL;
  78 int pk_use_enckey       = 0;
  79 static int canonicalize_flag = 0;
  80 static int enterprise_flag = 0;
  81 static int ok_as_delegate_flag = 0;
  82 static char *fast_armor_cache_string = NULL;
  83 static int use_referrals_flag = 0;
  84 static int windows_flag = 0;
  85 #ifndef NO_NTLM
  86 static char *ntlm_domain;
  87 #endif
  88
  89
  90 static struct getargs args[] = {
  91     /*
  92      * used by MIT
  93      * a: ~A
  94      * V: verbose
  95      * F: ~f
  96      * P: ~p
  97      * C: v4 cache name?
  98      * 5:
  99      *
 100      * old flags
 101      * 4:
 102      * 9:
 103      */
 104     { "afslog",         0  , arg_flag, &do_afslog,
 105       NP_("obtain afs tokens", ""), NULL },
 106
 107     { "cache",          'c', arg_string, &cred_cache,
 108       NP_("credentials cache", ""), "cachename" },
 109
 110     { "forwardable",    'F', arg_negative_flag, &forwardable_flag,
 111       NP_("get tickets not forwardable", ""), NULL },
 112
 113     { NULL,             'f', arg_flag, &forwardable_flag,
 114       NP_("get forwardable tickets", ""), NULL },
 115
 116     { "keytab",         't', arg_string, &keytab_str,
 117       NP_("keytab to use", ""), "keytabname" },
 118
 119     { "lifetime",       'l', arg_string, &lifetime,
 120       NP_("lifetime of tickets", ""), "time" },
 121
 122     { "proxiable",      'p', arg_flag, &proxiable_flag,
 123       NP_("get proxiable tickets", ""), NULL },
 124
 125     { "renew",          'R', arg_flag, &renew_flag,
 126       NP_("renew TGT", ""), NULL },
 127
 128     { "renewable",      0,   arg_flag, &renewable_flag,
 129       NP_("get renewable tickets", ""), NULL },
 130
 131     { "renewable-life", 'r', arg_string, &renew_life,
 132       NP_("renewable lifetime of tickets", ""), "time" },
 133
 134     { "server",         'S', arg_string, &server_str,
 135       NP_("server to get ticket for", ""), "principal" },
 136
 137     { "start-time",     's', arg_string, &start_str,
 138       NP_("when ticket gets valid", ""), "time" },
 139
 140     { "use-keytab",     'k', arg_flag, &use_keytab,
 141       NP_("get key from keytab", ""), NULL },
 142
 143     { "validate",       'v', arg_flag, &validate_flag,
 144       NP_("validate TGT", ""), NULL },
 145
 146     { "enctypes",       'e', arg_strings, &etype_str,
 147       NP_("encryption types to use", ""), "enctypes" },
 148
 149     { "fcache-version", 0,   arg_integer, &fcache_version,
 150       NP_("file cache version to create", ""), NULL },
 151
 152     { "addresses",      'A',   arg_negative_flag,       &addrs_flag,
 153       NP_("request a ticket with no addresses", ""), NULL },
 154
 155     { "extra-addresses",'a', arg_strings,       &extra_addresses,
 156       NP_("include these extra addresses", ""), "addresses" },
 157
 158     { "anonymous",      0,   arg_flag,  &anonymous_flag,
 159       NP_("request an anonymous ticket", ""), NULL },
 160
 161     { "request-pac",    0,   arg_flag,  &pac_flag,
 162       NP_("request a Windows PAC", ""), NULL },
 163
 164     { "password-file",  0,   arg_string, &password_file,
 165       NP_("read the password from a file", ""), NULL },
 166
 167     { "canonicalize",0,   arg_flag, &canonicalize_flag,
 168       NP_("canonicalize client principal", ""), NULL },
 169
 170     { "enterprise",0,   arg_flag, &enterprise_flag,
 171       NP_("parse principal as a KRB5-NT-ENTERPRISE name", ""), NULL },
 172 #ifdef PKINIT
 173     { "pk-enterprise",  0,      arg_flag,       &pk_enterprise_flag,
 174       NP_("use enterprise name from certificate", ""), NULL },
 175
 176     { "pk-user",        'C',    arg_string,     &pk_user_id,
 177       NP_("principal's public/private/certificate identifier", ""), "id" },
 178
 179     { "x509-anchors",   'D',  arg_string, &pk_x509_anchors,
 180       NP_("directory with CA certificates", ""), "directory" },
 181
 182     { "pk-use-enckey",  0,  arg_flag, &pk_use_enckey,
 183       NP_("Use RSA encrypted reply (instead of DH)", ""), NULL },
 184 #endif
 185 #ifndef NO_NTLM
 186     { "ntlm-domain",    0,  arg_string, &ntlm_domain,
 187       NP_("NTLM domain", ""), "domain" },
 188 #endif
 189
 190     { "change-default",  0,  arg_negative_flag, &switch_cache_flags,
 191       NP_("switch the default cache to the new credentials cache", ""), NULL },
 192
 193     { "ok-as-delegate", 0,  arg_flag, &ok_as_delegate_flag,
 194       NP_("honor ok-as-delegate on tickets", ""), NULL },
 195
 196     { "fast-armor-cache",       0,  arg_string, &fast_armor_cache_string,
 197       NP_("use this credential cache as FAST armor cache", ""), "cache" },
 198
 199     { "use-referrals",  0,  arg_flag, &use_referrals_flag,
 200       NP_("only use referrals, no dns canalisation", ""), NULL },
 201
 202     { "windows",        0,  arg_flag, &windows_flag,
 203       NP_("get windows behavior", ""), NULL },
 204
 205     { "version",        0,   arg_flag, &version_flag, NULL, NULL },
 206     { "help",           0,   arg_flag, &help_flag, NULL, NULL }
 207 };
 208
 209 static void
 210 usage(int ret)
 211 {
 212     arg_printusage_i18n(args, sizeof(args)/sizeof(*args), N_("Usage: ", ""),
 213                         NULL, "[principal [command]]", getarg_i18n);
 214     exit(ret);
 215 }
 216
 217 static krb5_error_code
 218 get_server(krb5_context context,
 219            krb5_principal client,
 220            const char *server,
 221            krb5_principal *princ)
 222 {
 223     krb5_const_realm realm;
 224     if (server)
 225         return krb5_parse_name(context, server, princ);
 226
 227     realm = krb5_principal_get_realm(context, client);
 228     return krb5_make_principal(context, princ, realm,
 229                                KRB5_TGS_NAME, realm, NULL);
 230 }
 231
 232 static krb5_error_code
 233 copy_configs(krb5_context context,
 234              krb5_ccache dst,
 235              krb5_ccache src,
 236              krb5_principal start_ticket_server)
 237 {
 238     krb5_error_code ret;
 239     const char *cfg_names[] = {"realm-config", "FriendlyName", NULL};
 240     const char *cfg_names_w_pname[] = {"fast_avail", NULL};
 241     krb5_data cfg_data;
 242     size_t i;
 243
 244     for (i = 0; cfg_names[i]; i++) {
 245         ret = krb5_cc_get_config(context, src, NULL, cfg_names[i], &cfg_data);
 246         if (ret == KRB5_CC_NOTFOUND || ret == KRB5_CC_END) {
 247             continue;
 248         } else if (ret) {
 249             krb5_warn(context, ret, "krb5_cc_get_config");
 250             return ret;
 251         }
 252         ret = krb5_cc_set_config(context, dst, NULL, cfg_names[i], &cfg_data);
 253         if (ret)
 254             krb5_warn(context, ret, "krb5_cc_set_config");
 255     }
 256     for (i = 0; start_ticket_server && cfg_names_w_pname[i]; i++) {
 257         ret = krb5_cc_get_config(context, src, start_ticket_server,
 258                                  cfg_names_w_pname[i], &cfg_data);
 259         if (ret == KRB5_CC_NOTFOUND || ret == KRB5_CC_END) {
 260             continue;
 261         } else if (ret) {
 262             krb5_warn(context, ret, "krb5_cc_get_config");
 263             return ret;
 264         }
 265         ret = krb5_cc_set_config(context, dst, start_ticket_server,
 266                                  cfg_names_w_pname[i], &cfg_data);
 267         if (ret && ret != KRB5_CC_NOTFOUND)
 268             krb5_warn(context, ret, "krb5_cc_set_config");
 269     }
 270     /*
 271      * We don't copy cc configs for any other principals though (mostly
 272      * those are per-target time offsets and the like, so it's bad to
 273      * lose them, but hardly the end of the world, and as they may not
 274      * expire anyways, it's good to let them go).
 275      */
 276     return 0;
 277 }
 278
 279 static krb5_error_code
 280 renew_validate(krb5_context context,
 281                int renew,
 282                int validate,
 283                krb5_ccache cache,
 284                const char *server,
 285                krb5_deltat life)
 286 {
 287     krb5_error_code ret;
 288     krb5_ccache tempccache = NULL;
 289     krb5_creds in, *out = NULL;
 290     krb5_kdc_flags flags;
 291
 292     memset(&in, 0, sizeof(in));
 293
 294     ret = krb5_cc_get_principal(context, cache, &in.client);
 295     if (ret) {
 296         krb5_warn(context, ret, "krb5_cc_get_principal");
 297         return ret;
 298     }
 299     ret = get_server(context, in.client, server, &in.server);
 300     if (ret) {
 301         krb5_warn(context, ret, "get_server");
 302         goto out;
 303     }
 304
 305     if (renew) {
 306         /*
 307          * no need to check the error here, it's only to be
 308          * friendly to the user
 309          */
 310         krb5_get_credentials(context, KRB5_GC_CACHED, cache, &in, &out);
 311     }
 312
 313     flags.i = 0;
 314     flags.b.renewable         = flags.b.renew = renew;
 315     flags.b.validate          = validate;
 316
 317     if (forwardable_flag != -1)
 318         flags.b.forwardable       = forwardable_flag;
 319     else if (out)
 320         flags.b.forwardable       = out->flags.b.forwardable;
 321
 322     if (proxiable_flag != -1)
 323         flags.b.proxiable         = proxiable_flag;
 324     else if (out)
 325         flags.b.proxiable         = out->flags.b.proxiable;
 326
 327     if (anonymous_flag)
 328         flags.b.request_anonymous = anonymous_flag;
 329     if (life)
 330         in.times.endtime = time(NULL) + life;
 331
 332     if (out) {
 333         krb5_free_creds(context, out);
 334         out = NULL;
 335     }
 336
 337
 338     ret = krb5_get_kdc_cred(context,
 339                             cache,
 340                             flags,
 341                             NULL,
 342                             NULL,
 343                             &in,
 344                             &out);
 345     if (ret) {
 346         krb5_warn(context, ret, "krb5_get_kdc_cred");
 347         goto out;
 348     }
 349
 350     ret = krb5_cc_new_unique(context, krb5_cc_get_type(context, cache),
 351                              NULL, &tempccache);
 352     if (ret) {
 353         krb5_warn(context, ret, "krb5_cc_new_unique");
 354         goto out;
 355     }
 356
 357     ret = krb5_cc_initialize(context, tempccache, in.client);
 358     if (ret) {
 359         krb5_warn(context, ret, "krb5_cc_initialize");
 360         goto out;
 361     }
 362
 363     ret = krb5_cc_store_cred(context, tempccache, out);
 364     if (ret) {
 365         krb5_warn(context, ret, "krb5_cc_store_cred");
 366         goto out;
 367     }
 368
 369     /*
 370      * We want to preserve cc configs as some are security-relevant, and
 371      * anyways it's the friendly thing to do.
 372      */
 373     ret = copy_configs(context, tempccache, cache, out->server);
 374     if (ret)
 375         goto out;
 376
 377     ret = krb5_cc_move(context, tempccache, cache);
 378     if (ret) {
 379         krb5_warn(context, ret, "krb5_cc_move");
 380         goto out;
 381     }
 382     tempccache = NULL;
 383
 384 out:
 385     if (tempccache)
 386         krb5_cc_close(context, tempccache);
 387     if (out)
 388         krb5_free_creds(context, out);
 389     krb5_free_cred_contents(context, &in);
 390     return ret;
 391 }
 392
 393 #ifndef NO_NTLM
 394
 395 static krb5_error_code
 396 store_ntlmkey(krb5_context context, krb5_ccache id,
 397               const char *domain, struct ntlm_buf *buf)
 398 {
 399     krb5_error_code ret;
 400     krb5_data data;
 401     char *name;
 402     int aret;
 403
 404     ret = krb5_cc_get_config(context, id, NULL, "default-ntlm-domain", &data);
 405     if (ret == 0) {
 406         krb5_data_free(&data);
 407     } else {
 408         data.length = strlen(domain);
 409         data.data = rk_UNCONST(domain);
 410         ret = krb5_cc_set_config(context, id, NULL, "default-ntlm-domain", &data);
 411         if (ret != 0)
 412             return ret;
 413     }
 414
 415     aret = asprintf(&name, "ntlm-key-%s", domain);
 416     if (aret == -1 || name == NULL)
 417         return krb5_enomem(context);
 418
 419     data.length = buf->length;
 420     data.data = buf->data;
 421
 422     ret = krb5_cc_set_config(context, id, NULL, name, &data);
 423     free(name);
 424     return ret;
 425 }
 426 #endif
 427
 428 static krb5_error_code
 429 get_new_tickets(krb5_context context,
 430                 krb5_principal principal,
 431                 krb5_ccache ccache,
 432                 krb5_deltat ticket_life,
 433                 int interactive)
 434 {
 435     krb5_error_code ret;
 436     krb5_creds cred;
 437     char passwd[256];
 438     krb5_deltat start_time = 0;
 439     krb5_deltat renew = 0;
 440     const char *renewstr = NULL;
 441     krb5_enctype *enctype = NULL;
 442     krb5_ccache tempccache = NULL;
 443     krb5_init_creds_context ctx = NULL;
 444     krb5_get_init_creds_opt *opt = NULL;
 445     krb5_prompter_fct prompter = krb5_prompter_posix;
 446 #ifndef NO_NTLM
 447     struct ntlm_buf ntlmkey;
 448     memset(&ntlmkey, 0, sizeof(ntlmkey));
 449 #endif
 450     passwd[0] = '\0';
 451
 452     if (!interactive)
 453         prompter = NULL;
 454
 455     if (password_file) {
 456         FILE *f;
 457
 458         if (strcasecmp("STDIN", password_file) == 0)
 459             f = stdin;
 460         else
 461             f = fopen(password_file, "r");
 462         if (f == NULL) {
 463             krb5_warnx(context, "Failed to open the password file %s",
 464                        password_file);
 465             return errno;
 466         }
 467
 468         if (fgets(passwd, sizeof(passwd), f) == NULL) {
 469             krb5_warnx(context, N_("Failed to read password from file %s", ""),
 470                        password_file);
 471             fclose(f);
 472             return EINVAL; /* XXX Need a better error */
 473         }
 474         if (f != stdin)
 475             fclose(f);
 476         passwd[strcspn(passwd, "\n")] = '\0';
 477     }
 478
 479 #ifdef __APPLE__
 480     if (passwd[0] == '\0') {
 481         const char *realm;
 482         OSStatus osret;
 483         UInt32 length;
 484         void *buffer;
 485         char *name;
 486
 487         realm = krb5_principal_get_realm(context, principal);
 488
 489         ret = krb5_unparse_name_flags(context, principal,
 490                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &name);
 491         if (ret)
 492             goto nopassword;
 493
 494         osret = SecKeychainFindGenericPassword(NULL, strlen(realm), realm,
 495                                                strlen(name), name,
 496                                                &length, &buffer, NULL);
 497         free(name);
 498         if (osret == noErr && length < sizeof(passwd) - 1) {
 499             memcpy(passwd, buffer, length);
 500             passwd[length] = '\0';
 501         }
 502     nopassword:
 503         do { } while(0);
 504     }
 505 #endif
 506
 507     memset(&cred, 0, sizeof(cred));
 508
 509     ret = krb5_get_init_creds_opt_alloc(context, &opt);
 510     if (ret) {
 511         krb5_warn(context, ret, "krb5_get_init_creds_opt_alloc");
 512         goto out;
 513     }
 514
 515     krb5_get_init_creds_opt_set_default_flags(context, "kinit",
 516         krb5_principal_get_realm(context, principal), opt);
 517
 518     if (forwardable_flag != -1)
 519         krb5_get_init_creds_opt_set_forwardable(opt, forwardable_flag);
 520     if (proxiable_flag != -1)
 521         krb5_get_init_creds_opt_set_proxiable(opt, proxiable_flag);
 522     if (anonymous_flag)
 523         krb5_get_init_creds_opt_set_anonymous(opt, anonymous_flag);
 524     if (pac_flag != -1)
 525         krb5_get_init_creds_opt_set_pac_request(context, opt,
 526                                                 pac_flag ? TRUE : FALSE);
 527     if (canonicalize_flag)
 528         krb5_get_init_creds_opt_set_canonicalize(context, opt, TRUE);
 529     if (pk_enterprise_flag || enterprise_flag || canonicalize_flag || windows_flag)
 530         krb5_get_init_creds_opt_set_win2k(context, opt, TRUE);
 531     if (pk_user_id || ent_user_id || anonymous_flag) {
 532         ret = krb5_get_init_creds_opt_set_pkinit(context, opt,
 533                                                  principal,
 534                                                  pk_user_id,
 535                                                  pk_x509_anchors,
 536                                                  NULL,
 537                                                  NULL,
 538                                                  pk_use_enckey ? 2 : 0 |
 539                                                  anonymous_flag ? 4 : 0,
 540                                                  prompter,
 541                                                  NULL,
 542                                                  passwd);
 543         if (ret) {
 544             krb5_warn(context, ret, "krb5_get_init_creds_opt_set_pkinit");
 545             goto out;
 546         }
 547         if (ent_user_id)
 548             krb5_get_init_creds_opt_set_pkinit_user_certs(context, opt, ent_user_id);
 549     }
 550
 551     if (addrs_flag != -1)
 552         krb5_get_init_creds_opt_set_addressless(context, opt,
 553                                                 addrs_flag ? FALSE : TRUE);
 554
 555     if (renew_life == NULL && renewable_flag)
 556         renewstr = "1 month";
 557     if (renew_life)
 558         renewstr = renew_life;
 559     if (renewstr) {
 560         renew = parse_time(renewstr, "s");
 561         if (renew < 0)
 562             errx(1, "unparsable time: %s", renewstr);
 563
 564         krb5_get_init_creds_opt_set_renew_life(opt, renew);
 565     }
 566
 567     if (ticket_life != 0)
 568         krb5_get_init_creds_opt_set_tkt_life(opt, ticket_life);
 569
 570     if (start_str) {
 571         int tmp = parse_time(start_str, "s");
 572         if (tmp < 0)
 573             errx(1, N_("unparsable time: %s", ""), start_str);
 574
 575         start_time = tmp;
 576     }
 577
 578     if (etype_str.num_strings) {
 579         int i;
 580
 581         enctype = malloc(etype_str.num_strings * sizeof(*enctype));
 582         if (enctype == NULL)
 583             errx(1, "out of memory");
 584         for(i = 0; i < etype_str.num_strings; i++) {
 585             ret = krb5_string_to_enctype(context,
 586                                          etype_str.strings[i],
 587                                          &enctype[i]);
 588             if (ret)
 589                 errx(1, "unrecognized enctype: %s", etype_str.strings[i]);
 590         }
 591         krb5_get_init_creds_opt_set_etype_list(opt, enctype,
 592                                                etype_str.num_strings);
 593     }
 594
 595     ret = krb5_init_creds_init(context, principal, prompter, NULL, start_time, opt, &ctx);
 596     if (ret) {
 597         krb5_warn(context, ret, "krb5_init_creds_init");
 598         goto out;
 599     }
 600
 601     if (server_str) {
 602         ret = krb5_init_creds_set_service(context, ctx, server_str);
 603         if (ret) {
 604             krb5_warn(context, ret, "krb5_init_creds_set_service");
 605             goto out;
 606         }
 607     }
 608
 609     if (fast_armor_cache_string) {
 610         krb5_ccache fastid;
 611
 612         ret = krb5_cc_resolve(context, fast_armor_cache_string, &fastid);
 613         if (ret) {
 614             krb5_warn(context, ret, "krb5_cc_resolve(FAST cache)");
 615             goto out;
 616         }
 617
 618         ret = krb5_init_creds_set_fast_ccache(context, ctx, fastid);
 619         if (ret) {
 620             krb5_warn(context, ret, "krb5_init_creds_set_fast_ccache");
 621             goto out;
 622         }
 623     }
 624
 625     if (use_keytab || keytab_str) {
 626         ret = krb5_init_creds_set_keytab(context, ctx, kt);
 627         if (ret) {
 628             krb5_warn(context, ret, "krb5_init_creds_set_keytab");
 629             goto out;
 630         }
 631     } else if (pk_user_id || ent_user_id || anonymous_flag) {
 632
 633     } else if (!interactive && passwd[0] == '\0') {
 634         static int already_warned = 0;
 635
 636         if (!already_warned)
 637             krb5_warnx(context, "Not interactive, failed to get "
 638               "initial ticket");
 639         krb5_get_init_creds_opt_free(context, opt);
 640         already_warned = 1;
 641         return 0;
 642     } else {
 643
 644         if (passwd[0] == '\0') {
 645             char *p, *prompt;
 646             int aret = 0;
 647
 648             ret = krb5_unparse_name(context, principal, &p);
 649             if (ret)
 650                 errx(1, "failed to generate passwd prompt: not enough memory");
 651
 652             aret = asprintf(&prompt, N_("%s's Password: ", ""), p);
 653             free(p);
 654             if (aret == -1)
 655                 errx(1, "failed to generate passwd prompt: not enough memory");
 656
 657             if (UI_UTIL_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){
 658                 memset(passwd, 0, sizeof(passwd));
 659                 errx(1, "failed to read password");
 660             }
 661             free(prompt);
 662         }
 663
 664         if (passwd[0]) {
 665             ret = krb5_init_creds_set_password(context, ctx, passwd);
 666             if (ret) {
 667                 krb5_warn(context, ret, "krb5_init_creds_set_password");
 668                 goto out;
 669             }
 670         }
 671     }
 672
 673     ret = krb5_init_creds_get(context, ctx);
 674
 675 #ifndef NO_NTLM
 676     if (ntlm_domain && passwd[0])
 677         heim_ntlm_nt_key(passwd, &ntlmkey);
 678 #endif
 679     memset(passwd, 0, sizeof(passwd));
 680
 681     switch(ret){
 682     case 0:
 683         break;
 684     case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */
 685         exit(1);
 686     case KRB5KRB_AP_ERR_BAD_INTEGRITY:
 687     case KRB5KRB_AP_ERR_MODIFIED:
 688     case KRB5KDC_ERR_PREAUTH_FAILED:
 689     case KRB5_GET_IN_TKT_LOOP:
 690         krb5_warnx(context, N_("Password incorrect", ""));
 691         goto out;
 692     case KRB5KRB_AP_ERR_V4_REPLY:
 693         krb5_warnx(context, N_("Looks like a Kerberos 4 reply", ""));
 694         goto out;
 695     case KRB5KDC_ERR_KEY_EXPIRED:
 696         krb5_warnx(context, N_("Password expired", ""));
 697         goto out;
 698     default:
 699         krb5_warn(context, ret, "krb5_get_init_creds");
 700         goto out;
 701     }
 702
 703     krb5_process_last_request(context, opt, ctx);
 704
 705     ret = krb5_init_creds_get_creds(context, ctx, &cred);
 706     if (ret) {
 707         krb5_warn(context, ret, "krb5_init_creds_get_creds");
 708         goto out;
 709     }
 710
 711     if (ticket_life != 0) {
 712         if (labs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) {
 713             char life[64];
 714             unparse_time_approx(cred.times.endtime - cred.times.starttime,
 715                                 life, sizeof(life));
 716             krb5_warnx(context, N_("NOTICE: ticket lifetime is %s", ""), life);
 717         }
 718     }
 719     if (renew_life) {
 720         if (labs(cred.times.renew_till - cred.times.starttime - renew) > 30) {
 721             char life[64];
 722             unparse_time_approx(cred.times.renew_till - cred.times.starttime,
 723                                 life, sizeof(life));
 724             krb5_warnx(context,
 725                        N_("NOTICE: ticket renewable lifetime is %s", ""),
 726                        life);
 727         }
 728     }
 729     krb5_free_cred_contents(context, &cred);
 730
 731     ret = krb5_cc_new_unique(context, krb5_cc_get_type(context, ccache),
 732                              NULL, &tempccache);
 733     if (ret) {
 734         krb5_warn(context, ret, "krb5_cc_new_unique");
 735         goto out;
 736     }
 737
 738     ret = krb5_init_creds_store(context, ctx, tempccache);
 739     if (ret) {
 740         krb5_warn(context, ret, "krb5_init_creds_store");
 741         goto out;
 742     }
 743
 744     krb5_init_creds_free(context, ctx);
 745     ctx = NULL;
 746
 747     ret = krb5_cc_move(context, tempccache, ccache);
 748     if (ret) {
 749         krb5_warn(context, ret, "krb5_cc_move");
 750         goto out;
 751     }
 752     tempccache = NULL;
 753
 754     if (switch_cache_flags)
 755         krb5_cc_switch(context, ccache);
 756
 757 #ifndef NO_NTLM
 758     if (ntlm_domain && ntlmkey.data)
 759         store_ntlmkey(context, ccache, ntlm_domain, &ntlmkey);
 760 #endif
 761
 762     if (ok_as_delegate_flag || windows_flag || use_referrals_flag) {
 763         unsigned char d = 0;
 764         krb5_data data;
 765
 766         if (ok_as_delegate_flag || windows_flag)
 767             d |= 1;
 768         if (use_referrals_flag || windows_flag)
 769             d |= 2;
 770
 771         data.length = 1;
 772         data.data = &d;
 773
 774         krb5_cc_set_config(context, ccache, NULL, "realm-config", &data);
 775     }
 776
 777 out:
 778     krb5_get_init_creds_opt_free(context, opt);
 779     if (ctx)
 780         krb5_init_creds_free(context, ctx);
 781     if (tempccache)
 782         krb5_cc_close(context, tempccache);
 783
 784     if (enctype)
 785         free(enctype);
 786
 787     return ret;
 788 }
 789
 790 static time_t
 791 ticket_lifetime(krb5_context context, krb5_ccache cache, krb5_principal client,
 792                 const char *server, time_t *renew)
 793 {
 794     krb5_creds in_cred, *cred;
 795     krb5_error_code ret;
 796     time_t timeout;
 797     time_t curtime;
 798
 799     memset(&in_cred, 0, sizeof(in_cred));
 800
 801     ret = krb5_cc_get_principal(context, cache, &in_cred.client);
 802     if (ret) {
 803         krb5_warn(context, ret, "krb5_cc_get_principal");
 804         return 0;
 805     }
 806     ret = get_server(context, in_cred.client, server, &in_cred.server);
 807     if (ret) {
 808         krb5_free_principal(context, in_cred.client);
 809         krb5_warn(context, ret, "get_server");
 810         return 0;
 811     }
 812
 813     ret = krb5_get_credentials(context, KRB5_GC_CACHED,
 814                                cache, &in_cred, &cred);
 815     krb5_free_principal(context, in_cred.client);
 816     krb5_free_principal(context, in_cred.server);
 817     if (ret) {
 818         krb5_warn(context, ret, "krb5_get_credentials");
 819         return 0;
 820     }
 821     curtime = time(NULL);
 822     timeout = cred->times.endtime - curtime;
 823     if (timeout < 0)
 824         timeout = 0;
 825     if (renew) {
 826         *renew = cred->times.renew_till - curtime;
 827         if (*renew < 0)
 828             *renew = 0;
 829     }
 830     krb5_free_creds(context, cred);
 831     return timeout;
 832 }
 833
 834 static time_t expire;
 835
 836 static char siginfo_msg[1024] = "No credentials\n";
 837
 838 static void
 839 update_siginfo_msg(time_t exp, const char *srv)
 840 {
 841     /* Note that exp is relative time */
 842     memset(siginfo_msg, 0, sizeof(siginfo_msg));
 843     memcpy(&siginfo_msg, "Updating...\n", sizeof("Updating...\n"));
 844     if (exp) {
 845         if (srv == NULL) {
 846             snprintf(siginfo_msg, sizeof(siginfo_msg),
 847                      N_("kinit: TGT expires in %llu seconds\n", ""),
 848                      (unsigned long long)expire);
 849         } else {
 850             snprintf(siginfo_msg, sizeof(siginfo_msg),
 851                      N_("kinit: Ticket for %s expired\n", ""), srv);
 852         }
 853         return;
 854     }
 855
 856     /* Expired creds */
 857     if (srv == NULL) {
 858         snprintf(siginfo_msg, sizeof(siginfo_msg),
 859                  N_("kinit: TGT expired\n", ""));
 860     } else {
 861         snprintf(siginfo_msg, sizeof(siginfo_msg),
 862                  N_("kinit: Ticket for %s expired\n", ""), srv);
 863     }
 864 }
 865
 866 #ifdef HAVE_SIGACTION
 867 static void
 868 handle_siginfo(int sig)
 869 {
 870     struct iovec iov[2];
 871
 872     iov[0].iov_base = rk_UNCONST(siginfo_msg);
 873     iov[0].iov_len = strlen(siginfo_msg);
 874     iov[1].iov_base = "\n";
 875     iov[1].iov_len = 1;
 876
 877     writev(STDERR_FILENO, iov, sizeof(iov)/sizeof(iov[0]));
 878 }
 879 #endif
 880
 881 struct renew_ctx {
 882     krb5_context context;
 883     krb5_ccache  ccache;
 884     krb5_principal principal;
 885     krb5_deltat ticket_life;
 886     krb5_deltat timeout;
 887 };
 888
 889 static time_t
 890 renew_func(void *ptr)
 891 {
 892     krb5_error_code ret;
 893     struct renew_ctx *ctx = ptr;
 894     time_t renew_expire;
 895     static time_t exp_delay = 1;
 896
 897     /*
 898      * NOTE: We count on the ccache implementation to notice changes to the
 899      * actual ccache filesystem/whatever objects.  There should be no ccache
 900      * types for which this is not the case, but it might not hurt to
 901      * re-krb5_cc_resolve() after each successful renew_validate()/
 902      * get_new_tickets() call.
 903      */
 904
 905     expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal,
 906                              server_str, &renew_expire);
 907
 908     /*
 909      * When a keytab is available to obtain new tickets, if we are within
 910      * half of the original ticket lifetime of the renew limit, get a new
 911      * TGT instead of renewing the existing TGT.  Note, ctx->ticket_life
 912      * is zero by default (without a '-l' option) and cannot be used to
 913      * set the time scale on which we decide whether we're "close to the
 914      * renew limit".
 915      */
 916     if (use_keytab || keytab_str)
 917         expire += ctx->timeout;
 918     if (renew_expire > expire) {
 919         ret = renew_validate(ctx->context, 1, validate_flag, ctx->ccache,
 920                        server_str, ctx->ticket_life);
 921     } else {
 922         ret = get_new_tickets(ctx->context, ctx->principal, ctx->ccache,
 923                               ctx->ticket_life, 0);
 924     }
 925     expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal,
 926                              server_str, &renew_expire);
 927
 928 #ifndef NO_AFS
 929     if (ret == 0 && server_str == NULL && do_afslog && k_hasafs())
 930         krb5_afslog(ctx->context, ctx->ccache, NULL, NULL);
 931 #endif
 932
 933     update_siginfo_msg(expire, server_str);
 934
 935     /*
 936      * If our tickets have expired and we been able to either renew them
 937      * or obtain new tickets, then we still call this function but we use
 938      * an exponential backoff.  This should take care of the case where
 939      * we are using stored credentials but the KDC has been unavailable
 940      * for some reason...
 941      */
 942
 943     if (expire < 1) {
 944         /*
 945          * We can't ask to keep spamming stderr but not syslog, so we warn
 946          * only once.
 947          */
 948         if (exp_delay == 1) {
 949             krb5_warnx(ctx->context, N_("NOTICE: Could not renew/refresh "
 950                                         "tickets", ""));
 951         }
 952         if (exp_delay < 7200)
 953             exp_delay += exp_delay / 2 + 1;
 954         return exp_delay;
 955     }
 956     exp_delay = 1;
 957
 958     return expire / 2 + 1;
 959 }
 960
 961 static void
 962 set_princ_realm(krb5_context context,
 963                 krb5_principal principal,
 964                 const char *realm)
 965 {
 966     krb5_error_code ret;
 967
 968     if ((ret = krb5_principal_set_realm(context, principal, realm)) != 0)
 969         krb5_err(context, 1, ret, "krb5_principal_set_realm");
 970 }
 971
 972 static void
 973 parse_name_realm(krb5_context context,
 974                  const char *name,
 975                  int flags,
 976                  const char *realm,
 977                  krb5_principal *princ)
 978 {
 979     krb5_error_code ret;
 980
 981     if (realm)
 982         flags |= KRB5_PRINCIPAL_PARSE_NO_DEF_REALM;
 983     if ((ret = krb5_parse_name_flags(context, name, flags, princ)) != 0)
 984         krb5_err(context, 1, ret, "krb5_parse_name_flags");
 985     if (realm && krb5_principal_get_realm(context, *princ) == NULL)
 986         set_princ_realm(context, *princ, realm);
 987 }
 988
 989 static char *
 990 get_default_realm(krb5_context context)
 991 {
 992     char *realm;
 993     krb5_error_code ret;
 994
 995     if ((ret = krb5_get_default_realm(context, &realm)) != 0)
 996         krb5_err(context, 1, ret, "krb5_get_default_realm");
 997     return realm;
 998 }
 999
1000 static void
1001 get_default_principal(krb5_context context, krb5_principal *princ)
1002 {
1003     krb5_error_code ret;
1004
1005     if ((ret = krb5_get_default_principal(context, princ)) != 0)
1006         krb5_err(context, 1, ret, "krb5_get_default_principal");
1007 }
1008
1009 static char *
1010 get_user_realm(krb5_context context)
1011 {
1012     krb5_error_code ret;
1013     char *user_realm = NULL;
1014
1015     /*
1016      * If memory allocation fails, we don't try to use the wrong realm,
1017      * that will trigger misleading error messages complicate support.
1018      */
1019     krb5_appdefault_string(context, "kinit", NULL, "user_realm", "",
1020                            &user_realm);
1021     if (user_realm == NULL) {
1022         ret = krb5_enomem(context);
1023         krb5_err(context, 1, ret, "krb5_appdefault_string");
1024     }
1025
1026     if (*user_realm == 0) {
1027         free(user_realm);
1028         user_realm = NULL;
1029     }
1030
1031     return user_realm;
1032 }
1033
1034 static void
1035 get_princ(krb5_context context, krb5_principal *principal, const char *name)
1036 {
1037     krb5_error_code ret;
1038     krb5_principal tmp;
1039     int parseflags = 0;
1040     char *user_realm;
1041
1042     if (name == NULL) {
1043         krb5_ccache ccache;
1044
1045         /* If credential cache provides a client principal, use that. */
1046         if (krb5_cc_default(context, &ccache) == 0) {
1047             ret = krb5_cc_get_principal(context, ccache, principal);
1048             krb5_cc_close(context, ccache);
1049             if (ret == 0)
1050                 return;
1051         }
1052     }
1053
1054     user_realm = get_user_realm(context);
1055
1056     if (name) {
1057         if (canonicalize_flag || enterprise_flag)
1058             parseflags |= KRB5_PRINCIPAL_PARSE_ENTERPRISE;
1059
1060         parse_name_realm(context, name, parseflags, user_realm, &tmp);
1061
1062         if (user_realm && krb5_principal_get_num_comp(context, tmp) > 1) {
1063             /* Principal is instance qualified, reparse with default realm. */
1064             krb5_free_principal(context, tmp);
1065             parse_name_realm(context, name, parseflags, NULL, principal);
1066         } else {
1067             *principal = tmp;
1068         }
1069     } else {
1070         get_default_principal(context, principal);
1071         if (user_realm)
1072             set_princ_realm(context, *principal, user_realm);
1073     }
1074
1075     if (user_realm)
1076         free(user_realm);
1077 }
1078
1079 static void
1080 get_princ_kt(krb5_context context,
1081              krb5_principal *principal,
1082              char *name)
1083 {
1084     krb5_error_code ret;
1085     krb5_principal tmp;
1086     krb5_ccache ccache;
1087     krb5_kt_cursor cursor;
1088     krb5_keytab_entry entry;
1089     char *def_realm;
1090
1091     if (name == NULL) {
1092         /*
1093          * If the credential cache exists and specifies a client principal,
1094          * use that.
1095          */
1096         if (krb5_cc_default(context, &ccache) == 0) {
1097             ret = krb5_cc_get_principal(context, ccache, principal);
1098             krb5_cc_close(context, ccache);
1099             if (ret == 0)
1100                 return;
1101         }
1102     }
1103
1104     if (name) {
1105         /* If the principal specifies an explicit realm, just use that. */
1106         int parseflags = KRB5_PRINCIPAL_PARSE_NO_DEF_REALM;
1107
1108         parse_name_realm(context, name, parseflags, NULL, &tmp);
1109         if (krb5_principal_get_realm(context, tmp) != NULL) {
1110             *principal = tmp;
1111             return;
1112         }
1113     } else {
1114         /* Otherwise, search keytab for bare name of the default principal. */
1115         get_default_principal(context, &tmp);
1116         set_princ_realm(context, tmp, NULL);
1117     }
1118
1119     def_realm = get_default_realm(context);
1120
1121     ret = krb5_kt_start_seq_get(context, kt, &cursor);
1122     if (ret)
1123         krb5_err(context, 1, ret, "krb5_kt_start_seq_get");
1124
1125     while (ret == 0 &&
1126            krb5_kt_next_entry(context, kt, &entry, &cursor) == 0) {
1127         const char *realm;
1128
1129         if (!krb5_principal_compare_any_realm(context, tmp, entry.principal))
1130             continue;
1131         if (*principal &&
1132             krb5_principal_compare(context, *principal, entry.principal))
1133             continue;
1134         /* The default realm takes precedence */
1135         realm = krb5_principal_get_realm(context, entry.principal);
1136         if (*principal && strcmp(def_realm, realm) == 0) {
1137             krb5_free_principal(context, *principal);
1138             ret = krb5_copy_principal(context, entry.principal, principal);
1139             break;
1140         }
1141         if (!*principal)
1142             ret = krb5_copy_principal(context, entry.principal, principal);
1143     }
1144     if (ret != 0 || (ret = krb5_kt_end_seq_get(context, kt, &cursor)) != 0)
1145         krb5_err(context, 1, ret, "get_princ_kt");
1146     if (!*principal) {
1147         if (name)
1148             parse_name_realm(context, name, 0, NULL, principal);
1149         else
1150             krb5_err(context, 1, KRB5_CC_NOTFOUND, "get_princ_kt");
1151     }
1152
1153     krb5_free_principal(context, tmp);
1154     free(def_realm);
1155 }
1156
1157 static krb5_error_code
1158 get_switched_ccache(krb5_context context,
1159                     const char * type,
1160                     krb5_principal principal,
1161                     krb5_ccache *ccache)
1162 {
1163     krb5_error_code ret;
1164
1165 #ifdef _WIN32
1166     if (strcmp(type, "API") == 0) {
1167         /*
1168          * Windows stores the default ccache name in the
1169          * registry which is shared across multiple logon
1170          * sessions for the same user.  The API credential
1171          * cache provides a unique name space per logon
1172          * session.  Therefore there is no need to generate
1173          * a unique ccache name.  Instead use the principal
1174          * name.  This provides a friendlier user experience.
1175          */
1176         char * unparsed_name;
1177         char * cred_cache;
1178
1179         ret = krb5_unparse_name(context, principal,
1180                                 &unparsed_name);
1181         if (ret)
1182             krb5_err(context, 1, ret,
1183                      N_("unparsing principal name", ""));
1184
1185         ret = asprintf(&cred_cache, "API:%s", unparsed_name);
1186         krb5_free_unparsed_name(context, unparsed_name);
1187         if (ret == -1 || cred_cache == NULL)
1188             krb5_err(context, 1, ret,
1189                       N_("building credential cache name", ""));
1190
1191         ret = krb5_cc_resolve(context, cred_cache, ccache);
1192         free(cred_cache);
1193     } else if (strcmp(type, "MSLSA") == 0) {
1194         /*
1195          * The Windows MSLSA cache when it is writeable
1196          * stores tickets for multiple client principals
1197          * in a single credential cache.
1198          */
1199         ret = krb5_cc_resolve(context, "MSLSA:", ccache);
1200     } else {
1201         ret = krb5_cc_new_unique(context, type, NULL, ccache);
1202     }
1203 #else /* !_WIN32 */
1204     ret = krb5_cc_new_unique(context, type, NULL, ccache);
1205 #endif /* _WIN32 */
1206
1207     return ret;
1208 }
1209
1210 int
1211 main(int argc, char **argv)
1212 {
1213     krb5_error_code ret;
1214     krb5_context context;
1215     krb5_ccache  ccache;
1216     krb5_principal principal = NULL;
1217     int optidx = 0;
1218     krb5_deltat ticket_life = 0;
1219 #ifdef HAVE_SIGACTION
1220     struct sigaction sa;
1221 #endif
1222
1223     setprogname(argv[0]);
1224
1225     setlocale(LC_ALL, "");
1226     bindtextdomain("heimdal_kuser", HEIMDAL_LOCALEDIR);
1227     textdomain("heimdal_kuser");
1228
1229     ret = krb5_init_context(&context);
1230     if (ret == KRB5_CONFIG_BADFORMAT)
1231         errx(1, "krb5_init_context failed to parse configuration file");
1232     else if (ret)
1233         errx(1, "krb5_init_context failed: %d", ret);
1234
1235     if (getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
1236         usage(1);
1237
1238     if (help_flag)
1239         usage(0);
1240
1241     if (version_flag) {
1242         print_version(NULL);
1243         exit(0);
1244     }
1245
1246     argc -= optidx;
1247     argv += optidx;
1248
1249     /*
1250      * Open the keytab now, we use the keytab to determine the principal's
1251      * realm when the requested principal has no realm.
1252      */
1253     if (use_keytab || keytab_str) {
1254         if (keytab_str)
1255             ret = krb5_kt_resolve(context, keytab_str, &kt);
1256         else
1257             ret = krb5_kt_default(context, &kt);
1258         if (ret)
1259             krb5_err(context, 1, ret, "resolving keytab");
1260     }
1261
1262     if (pk_enterprise_flag) {
1263         ret = krb5_pk_enterprise_cert(context, pk_user_id,
1264                                       argv[0], &principal,
1265                                       &ent_user_id);
1266         if (ret)
1267             krb5_err(context, 1, ret, "krb5_pk_enterprise_certs");
1268
1269         pk_user_id = NULL;
1270
1271     } else if (anonymous_flag) {
1272
1273         ret = krb5_make_principal(context, &principal, argv[0],
1274                                   KRB5_WELLKNOWN_NAME, KRB5_ANON_NAME,
1275                                   NULL);
1276         if (ret)
1277             krb5_err(context, 1, ret, "krb5_make_principal");
1278         krb5_principal_set_type(context, principal, KRB5_NT_WELLKNOWN);
1279
1280     } else if (use_keytab || keytab_str) {
1281         get_princ_kt(context, &principal, argv[0]);
1282     } else {
1283         get_princ(context, &principal, argv[0]);
1284     }
1285
1286     if (fcache_version)
1287         krb5_set_fcache_version(context, fcache_version);
1288
1289     if (renewable_flag == -1)
1290         /* this seems somewhat pointless, but whatever */
1291         krb5_appdefault_boolean(context, "kinit",
1292                                 krb5_principal_get_realm(context, principal),
1293                                 "renewable", FALSE, &renewable_flag);
1294     if (do_afslog == -1)
1295         krb5_appdefault_boolean(context, "kinit",
1296                                 krb5_principal_get_realm(context, principal),
1297                                 "afslog", TRUE, &do_afslog);
1298
1299     if (cred_cache)
1300         ret = krb5_cc_resolve(context, cred_cache, &ccache);
1301     else {
1302         if (argc > 1) {
1303             char s[1024];
1304             ret = krb5_cc_new_unique(context, NULL, NULL, &ccache);
1305             if (ret)
1306                 krb5_err(context, 1, ret, "creating cred cache");
1307             snprintf(s, sizeof(s), "%s:%s",
1308                      krb5_cc_get_type(context, ccache),
1309                      krb5_cc_get_name(context, ccache));
1310             setenv("KRB5CCNAME", s, 1);
1311         } else {
1312             ret = krb5_cc_cache_match(context, principal, &ccache);
1313             if (ret) {
1314                 const char *type;
1315                 ret = krb5_cc_default(context, &ccache);
1316                 if (ret)
1317                     krb5_err(context, 1, ret,
1318                              N_("resolving credentials cache", ""));
1319
1320                 /*
1321                  * Check if the type support switching, and we do,
1322                  * then do that instead over overwriting the current
1323                  * default credential
1324                  */
1325                 type = krb5_cc_get_type(context, ccache);
1326                 if (krb5_cc_support_switch(context, type)) {
1327                     krb5_cc_close(context, ccache);
1328                     ret = get_switched_ccache(context, type, principal,
1329                                               &ccache);
1330                 }
1331             }
1332         }
1333     }
1334     if (ret)
1335         krb5_err(context, 1, ret, N_("resolving credentials cache", ""));
1336
1337 #ifndef NO_AFS
1338     if (argc > 1 && k_hasafs())
1339         k_setpag();
1340 #endif
1341
1342     if (lifetime) {
1343         int tmp = parse_time(lifetime, "s");
1344         if (tmp < 0)
1345             errx(1, N_("unparsable time: %s", ""), lifetime);
1346
1347         ticket_life = tmp;
1348     }
1349
1350     if (addrs_flag == 0 && extra_addresses.num_strings > 0)
1351         krb5_errx(context, 1,
1352                   N_("specifying both extra addresses and "
1353                      "no addresses makes no sense", ""));
1354     {
1355         int i;
1356         krb5_addresses addresses;
1357         memset(&addresses, 0, sizeof(addresses));
1358         for(i = 0; i < extra_addresses.num_strings; i++) {
1359             ret = krb5_parse_address(context, extra_addresses.strings[i],
1360                                      &addresses);
1361             if (ret == 0) {
1362                 krb5_add_extra_addresses(context, &addresses);
1363                 krb5_free_addresses(context, &addresses);
1364             }
1365         }
1366         free_getarg_strings(&extra_addresses);
1367     }
1368
1369     if (renew_flag || validate_flag) {
1370         ret = renew_validate(context, renew_flag, validate_flag,
1371                              ccache, server_str, ticket_life);
1372
1373 #ifndef NO_AFS
1374         if (ret == 0 && server_str == NULL && do_afslog && k_hasafs())
1375             krb5_afslog(context, ccache, NULL, NULL);
1376 #endif
1377
1378         exit(ret != 0);
1379     }
1380
1381     ret = get_new_tickets(context, principal, ccache, ticket_life, 1);
1382     if (ret)
1383         exit(1);
1384
1385 #ifndef NO_AFS
1386     if (ret == 0 && server_str == NULL && do_afslog && k_hasafs())
1387         krb5_afslog(context, ccache, NULL, NULL);
1388 #endif
1389
1390     if (argc > 1) {
1391         struct renew_ctx ctx;
1392         time_t timeout;
1393
1394         timeout = ticket_lifetime(context, ccache, principal,
1395                                   server_str, NULL) / 2;
1396
1397         ctx.context = context;
1398         ctx.ccache = ccache;
1399         ctx.principal = principal;
1400         ctx.ticket_life = ticket_life;
1401         ctx.timeout = timeout;
1402
1403 #ifdef HAVE_SIGACTION
1404         memset(&sa, 0, sizeof(sa));
1405         sigemptyset(&sa.sa_mask);
1406         sa.sa_handler = handle_siginfo;
1407
1408         sigaction(SIGINFO, &sa, NULL);
1409 #endif
1410
1411         ret = simple_execvp_timed(argv[1], argv+1,
1412                                   renew_func, &ctx, timeout);
1413 #define EX_NOEXEC       126
1414 #define EX_NOTFOUND     127
1415         if (ret == EX_NOEXEC)
1416             krb5_warnx(context, N_("permission denied: %s", ""), argv[1]);
1417         else if (ret == EX_NOTFOUND)
1418             krb5_warnx(context, N_("command not found: %s", ""), argv[1]);
1419
1420         krb5_cc_destroy(context, ccache);
1421 #ifndef NO_AFS
1422         if (k_hasafs())
1423             k_unlog();
1424 #endif
1425     } else {
1426         krb5_cc_close(context, ccache);
1427         ret = 0;
1428     }
1429     krb5_free_principal(context, principal);
1430     if (kt)
1431         krb5_kt_close(context, kt);
1432     krb5_free_context(context);
1433     return ret;
1434 }