crypto/heimdal-0.6.3/kuser/kinit.c

   1 /*
   2  * Copyright (c) 1997-2002 Kungliga Tekniska Högskolan
   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 1.90.4.5 2004/06/21 08:17:06 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         if(ret) {
 294             krb5_free_principal(context, client);
 295             return ret;
 296         }
 297         in_creds.client = client;
 298         ret = krb5_get_credentials(context, 0, ccache, &in_creds, &real_creds);
 299         krb5_free_principal(context, client);
 300         krb5_free_principal(context, in_creds.server);
 301         if(ret)
 302             return ret;
 303     }
 304     ret = krb524_convert_creds_kdc_ccache(context, ccache, real_creds, &c);
 305     if(ret)
 306         krb5_warn(context, ret, "converting creds");
 307     else {
 308         int tret = tf_setup(&c, c.pname, c.pinst);
 309         if(tret)
 310             krb5_warnx(context, "saving v4 creds: %s", krb_get_err_text(tret));
 311     }
 312
 313     if(creds == NULL)
 314         krb5_free_creds(context, real_creds);
 315     memset(&c, 0, sizeof(c));
 316
 317     return ret;
 318 }
 319 #endif
 320
 321 static int
 322 renew_validate(krb5_context context,
 323                int renew,
 324                int validate,
 325                krb5_ccache cache,
 326                const char *server,
 327                krb5_deltat life)
 328 {
 329     krb5_error_code ret;
 330     krb5_creds in, *out;
 331     krb5_kdc_flags flags;
 332
 333     memset(&in, 0, sizeof(in));
 334
 335     ret = krb5_cc_get_principal(context, cache, &in.client);
 336     if(ret) {
 337         krb5_warn(context, ret, "krb5_cc_get_principal");
 338         return ret;
 339     }
 340     ret = get_server(context, in.client, server, &in.server);
 341     if(ret) {
 342         krb5_warn(context, ret, "get_server");
 343         goto out;
 344     }
 345     flags.i = 0;
 346     flags.b.renewable         = flags.b.renew = renew;
 347     flags.b.validate          = validate;
 348     if (forwardable_flag != -1)
 349         flags.b.forwardable       = forwardable_flag;
 350     if (proxiable_flag != -1)
 351         flags.b.proxiable         = proxiable_flag;
 352     if (anonymous_flag != -1)
 353         flags.b.request_anonymous = anonymous_flag;
 354     if(life)
 355         in.times.endtime = time(NULL) + life;
 356
 357     ret = krb5_get_kdc_cred(context,
 358                             cache,
 359                             flags,
 360                             NULL,
 361                             NULL,
 362                             &in,
 363                             &out);
 364     if(ret) {
 365         krb5_warn(context, ret, "krb5_get_kdc_cred");
 366         goto out;
 367     }
 368     ret = krb5_cc_initialize(context, cache, in.client);
 369     if(ret) {
 370         krb5_free_creds (context, out);
 371         krb5_warn(context, ret, "krb5_cc_initialize");
 372         goto out;
 373     }
 374     ret = krb5_cc_store_cred(context, cache, out);
 375
 376     if(ret == 0 && server == NULL) {
 377 #ifdef KRB4
 378         /* only do this if it's a general renew-my-tgt request */
 379         if(get_v4_tgt)
 380             do_524init(context, cache, out, NULL);
 381 #endif
 382         if(do_afslog && k_hasafs())
 383             krb5_afslog(context, cache, NULL, NULL);
 384     }
 385
 386     krb5_free_creds (context, out);
 387     if(ret) {
 388         krb5_warn(context, ret, "krb5_cc_store_cred");
 389         goto out;
 390     }
 391 out:
 392     krb5_free_creds_contents(context, &in);
 393     return ret;
 394 }
 395
 396 static krb5_error_code
 397 get_new_tickets(krb5_context context,
 398                 krb5_principal principal,
 399                 krb5_ccache ccache,
 400                 krb5_deltat ticket_life)
 401 {
 402     krb5_error_code ret;
 403     krb5_get_init_creds_opt opt;
 404     krb5_addresses no_addrs;
 405     krb5_creds cred;
 406     char passwd[256];
 407     krb5_deltat start_time = 0;
 408     krb5_deltat renew = 0;
 409
 410     memset(&cred, 0, sizeof(cred));
 411
 412     krb5_get_init_creds_opt_init (&opt);
 413
 414     krb5_get_init_creds_opt_set_default_flags(context, "kinit",
 415                                               /* XXX */principal->realm, &opt);
 416
 417     if(forwardable_flag != -1)
 418         krb5_get_init_creds_opt_set_forwardable (&opt, forwardable_flag);
 419     if(proxiable_flag != -1)
 420         krb5_get_init_creds_opt_set_proxiable (&opt, proxiable_flag);
 421     if(anonymous_flag != -1)
 422         krb5_get_init_creds_opt_set_anonymous (&opt, anonymous_flag);
 423
 424     if (!addrs_flag) {
 425         no_addrs.len = 0;
 426         no_addrs.val = NULL;
 427
 428         krb5_get_init_creds_opt_set_address_list (&opt, &no_addrs);
 429     }
 430
 431     if (renew_life == NULL && renewable_flag)
 432         renew_life = "1 month";
 433     if(renew_life) {
 434         renew = parse_time (renew_life, "s");
 435         if (renew < 0)
 436             errx (1, "unparsable time: %s", renew_life);
 437
 438         krb5_get_init_creds_opt_set_renew_life (&opt, renew);
 439     }
 440
 441     if(ticket_life != 0)
 442         krb5_get_init_creds_opt_set_tkt_life (&opt, ticket_life);
 443
 444     if(start_str) {
 445         int tmp = parse_time (start_str, "s");
 446         if (tmp < 0)
 447             errx (1, "unparsable time: %s", start_str);
 448
 449         start_time = tmp;
 450     }
 451
 452     if(etype_str.num_strings) {
 453         krb5_enctype *enctype = NULL;
 454         int i;
 455         enctype = malloc(etype_str.num_strings * sizeof(*enctype));
 456         if(enctype == NULL)
 457             errx(1, "out of memory");
 458         for(i = 0; i < etype_str.num_strings; i++) {
 459             ret = krb5_string_to_enctype(context,
 460                                          etype_str.strings[i],
 461                                          &enctype[i]);
 462             if(ret)
 463                 errx(1, "unrecognized enctype: %s", etype_str.strings[i]);
 464         }
 465         krb5_get_init_creds_opt_set_etype_list(&opt, enctype,
 466                                                etype_str.num_strings);
 467     }
 468
 469     if(use_keytab || keytab_str) {
 470         krb5_keytab kt;
 471         if(keytab_str)
 472             ret = krb5_kt_resolve(context, keytab_str, &kt);
 473         else
 474             ret = krb5_kt_default(context, &kt);
 475         if (ret)
 476             krb5_err (context, 1, ret, "resolving keytab");
 477         ret = krb5_get_init_creds_keytab (context,
 478                                           &cred,
 479                                           principal,
 480                                           kt,
 481                                           start_time,
 482                                           server,
 483                                           &opt);
 484         krb5_kt_close(context, kt);
 485     } else {
 486         char *p, *prompt;
 487
 488         krb5_unparse_name (context, principal, &p);
 489         asprintf (&prompt, "%s's Password: ", p);
 490         free (p);
 491
 492         if (des_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){
 493             memset(passwd, 0, sizeof(passwd));
 494             exit(1);
 495         }
 496
 497         free (prompt);
 498
 499         ret = krb5_get_init_creds_password (context,
 500                                             &cred,
 501                                             principal,
 502                                             passwd,
 503                                             krb5_prompter_posix,
 504                                             NULL,
 505                                             start_time,
 506                                             server,
 507                                             &opt);
 508     }
 509 #ifdef KRB4
 510     if (ret == KRB5KRB_AP_ERR_V4_REPLY || ret == KRB5_KDC_UNREACH) {
 511         int exit_val;
 512
 513         exit_val = do_v4_fallback (context, principal, ticket_life,
 514                                    use_keytab, keytab_str, passwd);
 515         get_v4_tgt = 0;
 516         do_afslog  = 0;
 517         memset(passwd, 0, sizeof(passwd));
 518         if (exit_val == 0 || ret == KRB5KRB_AP_ERR_V4_REPLY)
 519             return exit_val;
 520     }
 521 #endif
 522     memset(passwd, 0, sizeof(passwd));
 523
 524     switch(ret){
 525     case 0:
 526         break;
 527     case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */
 528         exit(1);
 529     case KRB5KRB_AP_ERR_BAD_INTEGRITY:
 530     case KRB5KRB_AP_ERR_MODIFIED:
 531         krb5_errx(context, 1, "Password incorrect");
 532         break;
 533     default:
 534         krb5_err(context, 1, ret, "krb5_get_init_creds");
 535     }
 536
 537     if(ticket_life != 0) {
 538         if(abs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) {
 539             char life[32];
 540             unparse_time(cred.times.endtime - cred.times.starttime,
 541                          life, sizeof(life));
 542             krb5_warnx(context, "NOTICE: ticket lifetime is %s", life);
 543         }
 544     }
 545     if(renew != 0) {
 546         if(abs(cred.times.renew_till - cred.times.starttime - renew) > 30) {
 547             char life[32];
 548             unparse_time(cred.times.renew_till - cred.times.starttime,
 549                          life, sizeof(life));
 550             krb5_warnx(context, "NOTICE: ticket renewable lifetime is %s",
 551                        life);
 552         }
 553     }
 554
 555     ret = krb5_cc_initialize (context, ccache, cred.client);
 556     if (ret)
 557         krb5_err (context, 1, ret, "krb5_cc_initialize");
 558
 559     ret = krb5_cc_store_cred (context, ccache, &cred);
 560     if (ret)
 561         krb5_err (context, 1, ret, "krb5_cc_store_cred");
 562
 563     krb5_free_creds_contents (context, &cred);
 564
 565     return 0;
 566 }
 567
 568 int
 569 main (int argc, char **argv)
 570 {
 571     krb5_error_code ret;
 572     krb5_context context;
 573     krb5_ccache  ccache;
 574     krb5_principal principal;
 575     int optind = 0;
 576     krb5_deltat ticket_life = 0;
 577
 578     setprogname (argv[0]);
 579
 580     ret = krb5_init_context (&context);
 581     if (ret)
 582         errx(1, "krb5_init_context failed: %d", ret);
 583
 584     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optind))
 585         usage(1);
 586
 587     if (help_flag)
 588         usage (0);
 589
 590     if(version_flag) {
 591         print_version(NULL);
 592         exit(0);
 593     }
 594
 595     argc -= optind;
 596     argv += optind;
 597
 598     if (argv[0]) {
 599         ret = krb5_parse_name (context, argv[0], &principal);
 600         if (ret)
 601             krb5_err (context, 1, ret, "krb5_parse_name");
 602     } else {
 603         ret = kinit_get_default_principal (context, &principal);
 604         if (ret)
 605             krb5_err (context, 1, ret, "krb5_get_default_principal");
 606     }
 607
 608     if(fcache_version)
 609         krb5_set_fcache_version(context, fcache_version);
 610
 611     if(cred_cache)
 612         ret = krb5_cc_resolve(context, cred_cache, &ccache);
 613     else {
 614         if(argc > 1) {
 615             char s[1024];
 616             ret = krb5_cc_gen_new(context, &krb5_fcc_ops, &ccache);
 617             if(ret)
 618                 krb5_err(context, 1, ret, "creating cred cache");
 619             snprintf(s, sizeof(s), "%s:%s",
 620                      krb5_cc_get_type(context, ccache),
 621                      krb5_cc_get_name(context, ccache));
 622             setenv("KRB5CCNAME", s, 1);
 623 #ifdef KRB4
 624             {
 625                 int fd;
 626                 snprintf(s, sizeof(s), "%s_XXXXXX", TKT_ROOT);
 627                 if((fd = mkstemp(s)) >= 0) {
 628                     close(fd);
 629                     setenv("KRBTKFILE", s, 1);
 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 (argc > 1 && k_hasafs ())
 640         k_setpag();
 641
 642     if (lifetime) {
 643         int tmp = parse_time (lifetime, "s");
 644         if (tmp < 0)
 645             errx (1, "unparsable time: %s", lifetime);
 646
 647         ticket_life = tmp;
 648     }
 649 #ifdef KRB4
 650     if(get_v4_tgt == -1)
 651         krb5_appdefault_boolean(context, "kinit",
 652                                 krb5_principal_get_realm(context, principal),
 653                                 "krb4_get_tickets", TRUE, &get_v4_tgt);
 654 #endif
 655     if(do_afslog == -1)
 656         krb5_appdefault_boolean(context, "kinit",
 657                                 krb5_principal_get_realm(context, principal),
 658                                 "afslog", TRUE, &do_afslog);
 659
 660     if(!addrs_flag && extra_addresses.num_strings > 0)
 661         krb5_errx(context, 1, "specifying both extra addresses and "
 662                   "no addresses makes no sense");
 663     {
 664         int i;
 665         krb5_addresses addresses;
 666         memset(&addresses, 0, sizeof(addresses));
 667         for(i = 0; i < extra_addresses.num_strings; i++) {
 668             ret = krb5_parse_address(context, extra_addresses.strings[i],
 669                                      &addresses);
 670             if (ret == 0) {
 671                 krb5_add_extra_addresses(context, &addresses);
 672                 krb5_free_addresses(context, &addresses);
 673             }
 674         }
 675         free_getarg_strings(&extra_addresses);
 676     }
 677
 678
 679     if(renew_flag || validate_flag) {
 680         ret = renew_validate(context, renew_flag, validate_flag,
 681                              ccache, server, ticket_life);
 682         exit(ret != 0);
 683     }
 684
 685 #ifdef KRB4
 686     if(!convert_524)
 687 #endif
 688         get_new_tickets(context, principal, ccache, ticket_life);
 689
 690 #ifdef KRB4
 691     if(get_v4_tgt)
 692         do_524init(context, ccache, NULL, server);
 693 #endif
 694     if(do_afslog && k_hasafs())
 695         krb5_afslog(context, ccache, NULL, NULL);
 696     if(argc > 1) {
 697         ret = simple_execvp(argv[1], argv+1);
 698         krb5_cc_destroy(context, ccache);
 699 #ifdef KRB4
 700         dest_tkt();
 701 #endif
 702         if(k_hasafs())
 703             k_unlog();
 704     } else {
 705         krb5_cc_close (context, ccache);
 706         ret = 0;
 707     }
 708     krb5_free_principal(context, principal);
 709     krb5_free_context (context);
 710     return ret;
 711 }