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     aret = asprintf(&name, "ntlm-key-%s", domain);
 405     if (aret == -1 || name == NULL) {
 406         krb5_clear_error_message(context);
 407         return ENOMEM;
 408     }
 409
 410     data.length = buf->length;
 411     data.data = buf->data;
 412
 413     ret = krb5_cc_set_config(context, id, NULL, name, &data);
 414     free(name);
 415     return ret;
 416 }
 417 #endif
 418
 419 static krb5_error_code
 420 get_new_tickets(krb5_context context,
 421                 krb5_principal principal,
 422                 krb5_ccache ccache,
 423                 krb5_deltat ticket_life,
 424                 int interactive)
 425 {
 426     krb5_error_code ret;
 427     krb5_creds cred;
 428     char passwd[256];
 429     krb5_deltat start_time = 0;
 430     krb5_deltat renew = 0;
 431     const char *renewstr = NULL;
 432     krb5_enctype *enctype = NULL;
 433     krb5_ccache tempccache = NULL;
 434     krb5_init_creds_context ctx = NULL;
 435     krb5_get_init_creds_opt *opt = NULL;
 436     krb5_prompter_fct prompter = krb5_prompter_posix;
 437 #ifndef NO_NTLM
 438     struct ntlm_buf ntlmkey;
 439     memset(&ntlmkey, 0, sizeof(ntlmkey));
 440 #endif
 441     passwd[0] = '\0';
 442
 443     if (!interactive)
 444         prompter = NULL;
 445
 446     if (password_file) {
 447         FILE *f;
 448
 449         if (strcasecmp("STDIN", password_file) == 0)
 450             f = stdin;
 451         else
 452             f = fopen(password_file, "r");
 453         if (f == NULL) {
 454             krb5_warnx(context, "Failed to open the password file %s",
 455                        password_file);
 456             return errno;
 457         }
 458
 459         if (fgets(passwd, sizeof(passwd), f) == NULL) {
 460             krb5_warnx(context, N_("Failed to read password from file %s", ""),
 461                        password_file);
 462             fclose(f);
 463             return EINVAL; /* XXX Need a better error */
 464         }
 465         if (f != stdin)
 466             fclose(f);
 467         passwd[strcspn(passwd, "\n")] = '\0';
 468     }
 469
 470 #ifdef __APPLE__
 471     if (passwd[0] == '\0') {
 472         const char *realm;
 473         OSStatus osret;
 474         UInt32 length;
 475         void *buffer;
 476         char *name;
 477
 478         realm = krb5_principal_get_realm(context, principal);
 479
 480         ret = krb5_unparse_name_flags(context, principal,
 481                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &name);
 482         if (ret)
 483             goto nopassword;
 484
 485         osret = SecKeychainFindGenericPassword(NULL, strlen(realm), realm,
 486                                                strlen(name), name,
 487                                                &length, &buffer, NULL);
 488         free(name);
 489         if (osret == noErr && length < sizeof(passwd) - 1) {
 490             memcpy(passwd, buffer, length);
 491             passwd[length] = '\0';
 492         }
 493     nopassword:
 494         do { } while(0);
 495     }
 496 #endif
 497
 498     memset(&cred, 0, sizeof(cred));
 499
 500     ret = krb5_get_init_creds_opt_alloc(context, &opt);
 501     if (ret) {
 502         krb5_warn(context, ret, "krb5_get_init_creds_opt_alloc");
 503         goto out;
 504     }
 505
 506     krb5_get_init_creds_opt_set_default_flags(context, "kinit",
 507         krb5_principal_get_realm(context, principal), opt);
 508
 509     if (forwardable_flag != -1)
 510         krb5_get_init_creds_opt_set_forwardable(opt, forwardable_flag);
 511     if (proxiable_flag != -1)
 512         krb5_get_init_creds_opt_set_proxiable(opt, proxiable_flag);
 513     if (anonymous_flag)
 514         krb5_get_init_creds_opt_set_anonymous(opt, anonymous_flag);
 515     if (pac_flag != -1)
 516         krb5_get_init_creds_opt_set_pac_request(context, opt,
 517                                                 pac_flag ? TRUE : FALSE);
 518     if (canonicalize_flag)
 519         krb5_get_init_creds_opt_set_canonicalize(context, opt, TRUE);
 520     if (pk_enterprise_flag || enterprise_flag || canonicalize_flag || windows_flag)
 521         krb5_get_init_creds_opt_set_win2k(context, opt, TRUE);
 522     if (pk_user_id || ent_user_id || anonymous_flag) {
 523         ret = krb5_get_init_creds_opt_set_pkinit(context, opt,
 524                                                  principal,
 525                                                  pk_user_id,
 526                                                  pk_x509_anchors,
 527                                                  NULL,
 528                                                  NULL,
 529                                                  pk_use_enckey ? 2 : 0 |
 530                                                  anonymous_flag ? 4 : 0,
 531                                                  prompter,
 532                                                  NULL,
 533                                                  passwd);
 534         if (ret) {
 535             krb5_warn(context, ret, "krb5_get_init_creds_opt_set_pkinit");
 536             goto out;
 537         }
 538         if (ent_user_id)
 539             krb5_get_init_creds_opt_set_pkinit_user_certs(context, opt, ent_user_id);
 540     }
 541
 542     if (addrs_flag != -1)
 543         krb5_get_init_creds_opt_set_addressless(context, opt,
 544                                                 addrs_flag ? FALSE : TRUE);
 545
 546     if (renew_life == NULL && renewable_flag)
 547         renewstr = "1 month";
 548     if (renew_life)
 549         renewstr = renew_life;
 550     if (renewstr) {
 551         renew = parse_time(renewstr, "s");
 552         if (renew < 0)
 553             errx(1, "unparsable time: %s", renewstr);
 554
 555         krb5_get_init_creds_opt_set_renew_life(opt, renew);
 556     }
 557
 558     if (ticket_life != 0)
 559         krb5_get_init_creds_opt_set_tkt_life(opt, ticket_life);
 560
 561     if (start_str) {
 562         int tmp = parse_time(start_str, "s");
 563         if (tmp < 0)
 564             errx(1, N_("unparsable time: %s", ""), start_str);
 565
 566         start_time = tmp;
 567     }
 568
 569     if (etype_str.num_strings) {
 570         int i;
 571
 572         enctype = malloc(etype_str.num_strings * sizeof(*enctype));
 573         if (enctype == NULL)
 574             errx(1, "out of memory");
 575         for(i = 0; i < etype_str.num_strings; i++) {
 576             ret = krb5_string_to_enctype(context,
 577                                          etype_str.strings[i],
 578                                          &enctype[i]);
 579             if (ret)
 580                 errx(1, "unrecognized enctype: %s", etype_str.strings[i]);
 581         }
 582         krb5_get_init_creds_opt_set_etype_list(opt, enctype,
 583                                                etype_str.num_strings);
 584     }
 585
 586     ret = krb5_init_creds_init(context, principal, prompter, NULL, start_time, opt, &ctx);
 587     if (ret) {
 588         krb5_warn(context, ret, "krb5_init_creds_init");
 589         goto out;
 590     }
 591
 592     if (server_str) {
 593         ret = krb5_init_creds_set_service(context, ctx, server_str);
 594         if (ret) {
 595             krb5_warn(context, ret, "krb5_init_creds_set_service");
 596             goto out;
 597         }
 598     }
 599
 600     if (fast_armor_cache_string) {
 601         krb5_ccache fastid;
 602
 603         ret = krb5_cc_resolve(context, fast_armor_cache_string, &fastid);
 604         if (ret) {
 605             krb5_warn(context, ret, "krb5_cc_resolve(FAST cache)");
 606             goto out;
 607         }
 608
 609         ret = krb5_init_creds_set_fast_ccache(context, ctx, fastid);
 610         if (ret) {
 611             krb5_warn(context, ret, "krb5_init_creds_set_fast_ccache");
 612             goto out;
 613         }
 614     }
 615
 616     if (use_keytab || keytab_str) {
 617         ret = krb5_init_creds_set_keytab(context, ctx, kt);
 618         if (ret) {
 619             krb5_warn(context, ret, "krb5_init_creds_set_keytab");
 620             goto out;
 621         }
 622     } else if (pk_user_id || ent_user_id || anonymous_flag) {
 623
 624     } else if (!interactive && passwd[0] == '\0') {
 625         static int already_warned = 0;
 626
 627         if (!already_warned)
 628             krb5_warnx(context, "Not interactive, failed to get "
 629               "initial ticket");
 630         krb5_get_init_creds_opt_free(context, opt);
 631         already_warned = 1;
 632         return 0;
 633     } else {
 634
 635         if (passwd[0] == '\0') {
 636             char *p, *prompt;
 637             int aret = 0;
 638
 639             ret = krb5_unparse_name(context, principal, &p);
 640             if (ret)
 641                 errx(1, "failed to generate passwd prompt: not enough memory");
 642
 643             aret = asprintf(&prompt, N_("%s's Password: ", ""), p);
 644             free(p);
 645             if (aret == -1)
 646                 errx(1, "failed to generate passwd prompt: not enough memory");
 647
 648             if (UI_UTIL_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){
 649                 memset(passwd, 0, sizeof(passwd));
 650                 errx(1, "failed to read password");
 651             }
 652             free(prompt);
 653         }
 654
 655         if (passwd[0]) {
 656             ret = krb5_init_creds_set_password(context, ctx, passwd);
 657             if (ret) {
 658                 krb5_warn(context, ret, "krb5_init_creds_set_password");
 659                 goto out;
 660             }
 661         }
 662     }
 663
 664     ret = krb5_init_creds_get(context, ctx);
 665
 666 #ifndef NO_NTLM
 667     if (ntlm_domain && passwd[0])
 668         heim_ntlm_nt_key(passwd, &ntlmkey);
 669 #endif
 670     memset(passwd, 0, sizeof(passwd));
 671
 672     switch(ret){
 673     case 0:
 674         break;
 675     case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */
 676         exit(1);
 677     case KRB5KRB_AP_ERR_BAD_INTEGRITY:
 678     case KRB5KRB_AP_ERR_MODIFIED:
 679     case KRB5KDC_ERR_PREAUTH_FAILED:
 680     case KRB5_GET_IN_TKT_LOOP:
 681         krb5_warnx(context, N_("Password incorrect", ""));
 682         goto out;
 683     case KRB5KRB_AP_ERR_V4_REPLY:
 684         krb5_warnx(context, N_("Looks like a Kerberos 4 reply", ""));
 685         goto out;
 686     default:
 687         krb5_warn(context, ret, "krb5_get_init_creds");
 688         goto out;
 689     }
 690
 691     krb5_process_last_request(context, opt, ctx);
 692
 693     ret = krb5_init_creds_get_creds(context, ctx, &cred);
 694     if (ret) {
 695         krb5_warn(context, ret, "krb5_init_creds_get_creds");
 696         goto out;
 697     }
 698
 699     if (ticket_life != 0) {
 700         if (abs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) {
 701             char life[64];
 702             unparse_time_approx(cred.times.endtime - cred.times.starttime,
 703                                 life, sizeof(life));
 704             krb5_warnx(context, N_("NOTICE: ticket lifetime is %s", ""), life);
 705         }
 706     }
 707     if (renew_life) {
 708         if (abs(cred.times.renew_till - cred.times.starttime - renew) > 30) {
 709             char life[64];
 710             unparse_time_approx(cred.times.renew_till - cred.times.starttime,
 711                                 life, sizeof(life));
 712             krb5_warnx(context,
 713                        N_("NOTICE: ticket renewable lifetime is %s", ""),
 714                        life);
 715         }
 716     }
 717
 718     ret = krb5_cc_new_unique(context, krb5_cc_get_type(context, ccache),
 719                              NULL, &tempccache);
 720     if (ret) {
 721         krb5_warn(context, ret, "krb5_cc_new_unique");
 722         goto out;
 723     }
 724
 725     ret = krb5_init_creds_store(context, ctx, tempccache);
 726     if (ret) {
 727         krb5_warn(context, ret, "krb5_init_creds_store");
 728         goto out;
 729     }
 730
 731     krb5_init_creds_free(context, ctx);
 732     ctx = NULL;
 733
 734     ret = krb5_cc_move(context, tempccache, ccache);
 735     if (ret) {
 736         krb5_warn(context, ret, "krb5_cc_move");
 737         goto out;
 738     }
 739     tempccache = NULL;
 740
 741     if (switch_cache_flags)
 742         krb5_cc_switch(context, ccache);
 743
 744 #ifndef NO_NTLM
 745     if (ntlm_domain && ntlmkey.data)
 746         store_ntlmkey(context, ccache, ntlm_domain, &ntlmkey);
 747 #endif
 748
 749     if (ok_as_delegate_flag || windows_flag || use_referrals_flag) {
 750         unsigned char d = 0;
 751         krb5_data data;
 752
 753         if (ok_as_delegate_flag || windows_flag)
 754             d |= 1;
 755         if (use_referrals_flag || windows_flag)
 756             d |= 2;
 757
 758         data.length = 1;
 759         data.data = &d;
 760
 761         krb5_cc_set_config(context, ccache, NULL, "realm-config", &data);
 762     }
 763
 764 out:
 765     krb5_get_init_creds_opt_free(context, opt);
 766     if (ctx)
 767         krb5_init_creds_free(context, ctx);
 768     if (tempccache)
 769         krb5_cc_close(context, tempccache);
 770
 771     if (enctype)
 772         free(enctype);
 773
 774     return ret;
 775 }
 776
 777 static time_t
 778 ticket_lifetime(krb5_context context, krb5_ccache cache, krb5_principal client,
 779                 const char *server, time_t *renew)
 780 {
 781     krb5_creds in_cred, *cred;
 782     krb5_error_code ret;
 783     time_t timeout;
 784     time_t curtime;
 785
 786     memset(&in_cred, 0, sizeof(in_cred));
 787
 788     ret = krb5_cc_get_principal(context, cache, &in_cred.client);
 789     if (ret) {
 790         krb5_warn(context, ret, "krb5_cc_get_principal");
 791         return 0;
 792     }
 793     ret = get_server(context, in_cred.client, server, &in_cred.server);
 794     if (ret) {
 795         krb5_free_principal(context, in_cred.client);
 796         krb5_warn(context, ret, "get_server");
 797         return 0;
 798     }
 799
 800     ret = krb5_get_credentials(context, KRB5_GC_CACHED,
 801                                cache, &in_cred, &cred);
 802     krb5_free_principal(context, in_cred.client);
 803     krb5_free_principal(context, in_cred.server);
 804     if (ret) {
 805         krb5_warn(context, ret, "krb5_get_credentials");
 806         return 0;
 807     }
 808     curtime = time(NULL);
 809     timeout = cred->times.endtime - curtime;
 810     if (timeout < 0)
 811         timeout = 0;
 812     if (renew) {
 813         *renew = cred->times.renew_till - curtime;
 814         if (*renew < 0)
 815             *renew = 0;
 816     }
 817     krb5_free_creds(context, cred);
 818     return timeout;
 819 }
 820
 821 static time_t expire;
 822
 823 static char siginfo_msg[1024] = "No credentials\n";
 824
 825 static void
 826 update_siginfo_msg(time_t exp, const char *srv)
 827 {
 828     /* Note that exp is relative time */
 829     memset(siginfo_msg, 0, sizeof(siginfo_msg));
 830     memcpy(&siginfo_msg, "Updating...\n", sizeof("Updating...\n"));
 831     if (exp) {
 832         if (srv == NULL) {
 833             snprintf(siginfo_msg, sizeof(siginfo_msg),
 834                      N_("kinit: TGT expires in %llu seconds\n", ""),
 835                      (unsigned long long)expire);
 836         } else {
 837             snprintf(siginfo_msg, sizeof(siginfo_msg),
 838                      N_("kinit: Ticket for %s expired\n", ""), srv);
 839         }
 840         return;
 841     }
 842
 843     /* Expired creds */
 844     if (srv == NULL) {
 845         snprintf(siginfo_msg, sizeof(siginfo_msg),
 846                  N_("kinit: TGT expired\n", ""));
 847     } else {
 848         snprintf(siginfo_msg, sizeof(siginfo_msg),
 849                  N_("kinit: Ticket for %s expired\n", ""), srv);
 850     }
 851 }
 852
 853 #ifdef HAVE_SIGACTION
 854 static void
 855 handle_siginfo(int sig)
 856 {
 857     struct iovec iov[2];
 858
 859     iov[0].iov_base = rk_UNCONST(siginfo_msg);
 860     iov[0].iov_len = strlen(siginfo_msg);
 861     iov[1].iov_base = "\n";
 862     iov[1].iov_len = 1;
 863
 864     writev(STDERR_FILENO, iov, sizeof(iov)/sizeof(iov[0]));
 865 }
 866 #endif
 867
 868 struct renew_ctx {
 869     krb5_context context;
 870     krb5_ccache  ccache;
 871     krb5_principal principal;
 872     krb5_deltat ticket_life;
 873     krb5_deltat timeout;
 874 };
 875
 876 static time_t
 877 renew_func(void *ptr)
 878 {
 879     krb5_error_code ret;
 880     struct renew_ctx *ctx = ptr;
 881     time_t renew_expire;
 882     static time_t exp_delay = 1;
 883
 884     /*
 885      * NOTE: We count on the ccache implementation to notice changes to the
 886      * actual ccache filesystem/whatever objects.  There should be no ccache
 887      * types for which this is not the case, but it might not hurt to
 888      * re-krb5_cc_resolve() after each successful renew_validate()/
 889      * get_new_tickets() call.
 890      */
 891
 892     expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal,
 893                              server_str, &renew_expire);
 894
 895     /*
 896      * When a keytab is available to obtain new tickets, if we are within
 897      * half of the original ticket lifetime of the renew limit, get a new
 898      * TGT instead of renewing the existing TGT.  Note, ctx->ticket_life
 899      * is zero by default (without a '-l' option) and cannot be used to
 900      * set the time scale on which we decide whether we're "close to the
 901      * renew limit".
 902      */
 903     if (use_keytab || keytab_str)
 904         expire += ctx->timeout;
 905     if (renew_expire > expire) {
 906         ret = renew_validate(ctx->context, 1, validate_flag, ctx->ccache,
 907                        server_str, ctx->ticket_life);
 908     } else {
 909         ret = get_new_tickets(ctx->context, ctx->principal, ctx->ccache,
 910                               ctx->ticket_life, 0);
 911     }
 912     expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal,
 913                              server_str, &renew_expire);
 914
 915 #ifndef NO_AFS
 916     if (ret == 0 && server_str == NULL && do_afslog && k_hasafs())
 917         krb5_afslog(ctx->context, ctx->ccache, NULL, NULL);
 918 #endif
 919
 920     update_siginfo_msg(expire, server_str);
 921
 922     /*
 923      * If our tickets have expired and we been able to either renew them
 924      * or obtain new tickets, then we still call this function but we use
 925      * an exponential backoff.  This should take care of the case where
 926      * we are using stored credentials but the KDC has been unavailable
 927      * for some reason...
 928      */
 929
 930     if (expire < 1) {
 931         /*
 932          * We can't ask to keep spamming stderr but not syslog, so we warn
 933          * only once.
 934          */
 935         if (exp_delay == 1) {
 936             krb5_warnx(ctx->context, N_("NOTICE: Could not renew/refresh "
 937                                         "tickets", ""));
 938         }
 939         if (exp_delay < 7200)
 940             exp_delay += exp_delay / 2 + 1;
 941         return exp_delay;
 942     }
 943     exp_delay = 1;
 944
 945     return expire / 2 + 1;
 946 }
 947
 948 static void
 949 set_princ_realm(krb5_context context,
 950                 krb5_principal principal,
 951                 const char *realm)
 952 {
 953     krb5_error_code ret;
 954
 955     if ((ret = krb5_principal_set_realm(context, principal, realm)) != 0)
 956         krb5_err(context, 1, ret, "krb5_principal_set_realm");
 957 }
 958
 959 static void
 960 parse_name_realm(krb5_context context,
 961                  const char *name,
 962                  int flags,
 963                  const char *realm,
 964                  krb5_principal *princ)
 965 {
 966     krb5_error_code ret;
 967
 968     if (realm)
 969         flags |= KRB5_PRINCIPAL_PARSE_NO_DEF_REALM;
 970     if ((ret = krb5_parse_name_flags(context, name, flags, princ)) != 0)
 971         krb5_err(context, 1, ret, "krb5_parse_name_flags");
 972     if (realm && krb5_principal_get_realm(context, *princ) == NULL)
 973         set_princ_realm(context, *princ, realm);
 974 }
 975
 976 static char *
 977 get_default_realm(krb5_context context)
 978 {
 979     char *realm;
 980     krb5_error_code ret;
 981
 982     if ((ret = krb5_get_default_realm(context, &realm)) != 0)
 983         krb5_err(context, 1, ret, "krb5_get_default_realm");
 984     return realm;
 985 }
 986
 987 static void
 988 get_default_principal(krb5_context context, krb5_principal *princ)
 989 {
 990     krb5_error_code ret;
 991
 992     if ((ret = krb5_get_default_principal(context, princ)) != 0)
 993         krb5_err(context, 1, ret, "krb5_get_default_principal");
 994 }
 995
 996 static char *
 997 get_user_realm(krb5_context context)
 998 {
 999     krb5_error_code ret;
1000     char *user_realm = NULL;
1001
1002     /*
1003      * If memory allocation fails, we don't try to use the wrong realm,
1004      * that will trigger misleading error messages complicate support.
1005      */
1006     krb5_appdefault_string(context, "kinit", NULL, "user_realm", "",
1007                            &user_realm);
1008     if (user_realm == NULL) {
1009         ret = krb5_enomem(context);
1010         krb5_err(context, 1, ret, "krb5_appdefault_string");
1011     }
1012
1013     if (*user_realm == 0) {
1014         free(user_realm);
1015         user_realm = NULL;
1016     }
1017
1018     return user_realm;
1019 }
1020
1021 static void
1022 get_princ(krb5_context context, krb5_principal *principal, const char *name)
1023 {
1024     krb5_error_code ret;
1025     krb5_principal tmp;
1026     int parseflags = 0;
1027     char *user_realm;
1028
1029     if (name == NULL) {
1030         krb5_ccache ccache;
1031
1032         /* If credential cache provides a client principal, use that. */
1033         if (krb5_cc_default(context, &ccache) == 0) {
1034             ret = krb5_cc_get_principal(context, ccache, principal);
1035             krb5_cc_close(context, ccache);
1036             if (ret == 0)
1037                 return;
1038         }
1039     }
1040
1041     user_realm = get_user_realm(context);
1042
1043     if (name) {
1044         if (canonicalize_flag || enterprise_flag)
1045             parseflags |= KRB5_PRINCIPAL_PARSE_ENTERPRISE;
1046
1047         parse_name_realm(context, name, parseflags, user_realm, &tmp);
1048
1049         if (user_realm && krb5_principal_get_num_comp(context, tmp) > 1) {
1050             /* Principal is instance qualified, reparse with default realm. */
1051             krb5_free_principal(context, tmp);
1052             parse_name_realm(context, name, parseflags, NULL, principal);
1053         } else {
1054             *principal = tmp;
1055         }
1056     } else {
1057         get_default_principal(context, principal);
1058         if (user_realm)
1059             set_princ_realm(context, *principal, user_realm);
1060     }
1061
1062     if (user_realm)
1063         free(user_realm);
1064 }
1065
1066 static void
1067 get_princ_kt(krb5_context context,
1068              krb5_principal *principal,
1069              char *name)
1070 {
1071     krb5_error_code ret;
1072     krb5_principal tmp;
1073     krb5_ccache ccache;
1074     krb5_kt_cursor cursor;
1075     krb5_keytab_entry entry;
1076     char *def_realm;
1077
1078     if (name == NULL) {
1079         /*
1080          * If the credential cache exists and specifies a client principal,
1081          * use that.
1082          */
1083         if (krb5_cc_default(context, &ccache) == 0) {
1084             ret = krb5_cc_get_principal(context, ccache, principal);
1085             krb5_cc_close(context, ccache);
1086             if (ret == 0)
1087                 return;
1088         }
1089     }
1090
1091     if (name) {
1092         /* If the principal specifies an explicit realm, just use that. */
1093         int parseflags = KRB5_PRINCIPAL_PARSE_NO_DEF_REALM;
1094
1095         parse_name_realm(context, name, parseflags, NULL, &tmp);
1096         if (krb5_principal_get_realm(context, tmp) != NULL) {
1097             *principal = tmp;
1098             return;
1099         }
1100     } else {
1101         /* Otherwise, search keytab for bare name of the default principal. */
1102         get_default_principal(context, &tmp);
1103         set_princ_realm(context, tmp, NULL);
1104     }
1105
1106     def_realm = get_default_realm(context);
1107
1108     ret = krb5_kt_start_seq_get(context, kt, &cursor);
1109     if (ret)
1110         krb5_err(context, 1, ret, "krb5_kt_start_seq_get");
1111
1112     while (ret == 0 &&
1113            krb5_kt_next_entry(context, kt, &entry, &cursor) == 0) {
1114         const char *realm;
1115
1116         if (!krb5_principal_compare_any_realm(context, tmp, entry.principal))
1117             continue;
1118         if (*principal &&
1119             krb5_principal_compare(context, *principal, entry.principal))
1120             continue;
1121         /* The default realm takes precedence */
1122         realm = krb5_principal_get_realm(context, entry.principal);
1123         if (*principal && strcmp(def_realm, realm) == 0) {
1124             krb5_free_principal(context, *principal);
1125             ret = krb5_copy_principal(context, entry.principal, principal);
1126             break;
1127         }
1128         if (!*principal)
1129             ret = krb5_copy_principal(context, entry.principal, principal);
1130     }
1131     if (ret != 0 || (ret = krb5_kt_end_seq_get(context, kt, &cursor)) != 0)
1132         krb5_err(context, 1, ret, "get_princ_kt");
1133     if (!*principal)
1134         parse_name_realm(context, name, 0, NULL, principal);
1135
1136     krb5_free_principal(context, tmp);
1137     free(def_realm);
1138 }
1139
1140 int
1141 main(int argc, char **argv)
1142 {
1143     krb5_error_code ret;
1144     krb5_context context;
1145     krb5_ccache  ccache;
1146     krb5_principal principal = NULL;
1147     int optidx = 0;
1148     krb5_deltat ticket_life = 0;
1149 #ifdef HAVE_SIGACTION
1150     struct sigaction sa;
1151 #endif
1152
1153     setprogname(argv[0]);
1154
1155     setlocale(LC_ALL, "");
1156     bindtextdomain("heimdal_kuser", HEIMDAL_LOCALEDIR);
1157     textdomain("heimdal_kuser");
1158
1159     ret = krb5_init_context(&context);
1160     if (ret == KRB5_CONFIG_BADFORMAT)
1161         errx(1, "krb5_init_context failed to parse configuration file");
1162     else if (ret)
1163         errx(1, "krb5_init_context failed: %d", ret);
1164
1165     if (getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
1166         usage(1);
1167
1168     if (help_flag)
1169         usage(0);
1170
1171     if (version_flag) {
1172         print_version(NULL);
1173         exit(0);
1174     }
1175
1176     argc -= optidx;
1177     argv += optidx;
1178
1179     /*
1180      * Open the keytab now, we use the keytab to determine the principal's
1181      * realm when the requested principal has no realm.
1182      */
1183     if (use_keytab || keytab_str) {
1184         if (keytab_str)
1185             ret = krb5_kt_resolve(context, keytab_str, &kt);
1186         else
1187             ret = krb5_kt_default(context, &kt);
1188         if (ret)
1189             krb5_err(context, 1, ret, "resolving keytab");
1190     }
1191
1192     if (pk_enterprise_flag) {
1193         ret = krb5_pk_enterprise_cert(context, pk_user_id,
1194                                       argv[0], &principal,
1195                                       &ent_user_id);
1196         if (ret)
1197             krb5_err(context, 1, ret, "krb5_pk_enterprise_certs");
1198
1199         pk_user_id = NULL;
1200
1201     } else if (anonymous_flag) {
1202
1203         ret = krb5_make_principal(context, &principal, argv[0],
1204                                   KRB5_WELLKNOWN_NAME, KRB5_ANON_NAME,
1205                                   NULL);
1206         if (ret)
1207             krb5_err(context, 1, ret, "krb5_make_principal");
1208         krb5_principal_set_type(context, principal, KRB5_NT_WELLKNOWN);
1209
1210     } else if (use_keytab || keytab_str) {
1211         get_princ_kt(context, &principal, argv[0]);
1212     } else {
1213         get_princ(context, &principal, argv[0]);
1214     }
1215
1216     if (fcache_version)
1217         krb5_set_fcache_version(context, fcache_version);
1218
1219     if (renewable_flag == -1)
1220         /* this seems somewhat pointless, but whatever */
1221         krb5_appdefault_boolean(context, "kinit",
1222                                 krb5_principal_get_realm(context, principal),
1223                                 "renewable", FALSE, &renewable_flag);
1224     if (do_afslog == -1)
1225         krb5_appdefault_boolean(context, "kinit",
1226                                 krb5_principal_get_realm(context, principal),
1227                                 "afslog", TRUE, &do_afslog);
1228
1229     if (cred_cache)
1230         ret = krb5_cc_resolve(context, cred_cache, &ccache);
1231     else {
1232         if (argc > 1) {
1233             char s[1024];
1234             ret = krb5_cc_new_unique(context, NULL, NULL, &ccache);
1235             if (ret)
1236                 krb5_err(context, 1, ret, "creating cred cache");
1237             snprintf(s, sizeof(s), "%s:%s",
1238                      krb5_cc_get_type(context, ccache),
1239                      krb5_cc_get_name(context, ccache));
1240             setenv("KRB5CCNAME", s, 1);
1241         } else {
1242             ret = krb5_cc_cache_match(context, principal, &ccache);
1243             if (ret) {
1244                 const char *type;
1245                 ret = krb5_cc_default(context, &ccache);
1246                 if (ret)
1247                     krb5_err(context, 1, ret,
1248                              N_("resolving credentials cache", ""));
1249
1250                 /*
1251                  * Check if the type support switching, and we do,
1252                  * then do that instead over overwriting the current
1253                  * default credential
1254                  */
1255                 type = krb5_cc_get_type(context, ccache);
1256                 if (krb5_cc_support_switch(context, type)) {
1257                     krb5_cc_close(context, ccache);
1258                     ret = krb5_cc_new_unique(context, type, NULL, &ccache);
1259                 }
1260             }
1261         }
1262     }
1263     if (ret)
1264         krb5_err(context, 1, ret, N_("resolving credentials cache", ""));
1265
1266 #ifndef NO_AFS
1267     if (argc > 1 && k_hasafs())
1268         k_setpag();
1269 #endif
1270
1271     if (lifetime) {
1272         int tmp = parse_time(lifetime, "s");
1273         if (tmp < 0)
1274             errx(1, N_("unparsable time: %s", ""), lifetime);
1275
1276         ticket_life = tmp;
1277     }
1278
1279     if (addrs_flag == 0 && extra_addresses.num_strings > 0)
1280         krb5_errx(context, 1,
1281                   N_("specifying both extra addresses and "
1282                      "no addresses makes no sense", ""));
1283     {
1284         int i;
1285         krb5_addresses addresses;
1286         memset(&addresses, 0, sizeof(addresses));
1287         for(i = 0; i < extra_addresses.num_strings; i++) {
1288             ret = krb5_parse_address(context, extra_addresses.strings[i],
1289                                      &addresses);
1290             if (ret == 0) {
1291                 krb5_add_extra_addresses(context, &addresses);
1292                 krb5_free_addresses(context, &addresses);
1293             }
1294         }
1295         free_getarg_strings(&extra_addresses);
1296     }
1297
1298     if (renew_flag || validate_flag) {
1299         ret = renew_validate(context, renew_flag, validate_flag,
1300                              ccache, server_str, ticket_life);
1301
1302 #ifndef NO_AFS
1303         if (ret == 0 && server_str == NULL && do_afslog && k_hasafs())
1304             krb5_afslog(context, ccache, NULL, NULL);
1305 #endif
1306
1307         exit(ret != 0);
1308     }
1309
1310     ret = get_new_tickets(context, principal, ccache, ticket_life, 1);
1311     if (ret)
1312         exit(1);
1313
1314 #ifndef NO_AFS
1315     if (ret == 0 && server_str == NULL && do_afslog && k_hasafs())
1316         krb5_afslog(context, ccache, NULL, NULL);
1317 #endif
1318
1319     if (argc > 1) {
1320         struct renew_ctx ctx;
1321         time_t timeout;
1322
1323         timeout = ticket_lifetime(context, ccache, principal,
1324                                   server_str, NULL) / 2;
1325
1326         ctx.context = context;
1327         ctx.ccache = ccache;
1328         ctx.principal = principal;
1329         ctx.ticket_life = ticket_life;
1330         ctx.timeout = timeout;
1331
1332 #ifdef HAVE_SIGACTION
1333         memset(&sa, 0, sizeof(sa));
1334         sigemptyset(&sa.sa_mask);
1335         sa.sa_handler = handle_siginfo;
1336
1337         sigaction(SIGINFO, &sa, NULL);
1338 #endif
1339
1340         ret = simple_execvp_timed(argv[1], argv+1,
1341                                   renew_func, &ctx, timeout);
1342 #define EX_NOEXEC       126
1343 #define EX_NOTFOUND     127
1344         if (ret == EX_NOEXEC)
1345             krb5_warnx(context, N_("permission denied: %s", ""), argv[1]);
1346         else if (ret == EX_NOTFOUND)
1347             krb5_warnx(context, N_("command not found: %s", ""), argv[1]);
1348
1349         krb5_cc_destroy(context, ccache);
1350 #ifndef NO_AFS
1351         if (k_hasafs())
1352             k_unlog();
1353 #endif
1354     } else {
1355         krb5_cc_close(context, ccache);
1356         ret = 0;
1357     }
1358     krb5_free_principal(context, principal);
1359     if (kt)
1360         krb5_kt_close(context, kt);
1361     krb5_free_context(context);
1362     return ret;
1363 }