source4/heimdal/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 int forwardable_flag    = -1;
  47 int proxiable_flag      = -1;
  48 int renewable_flag      = -1;
  49 int renew_flag          = 0;
  50 int pac_flag            = -1;
  51 int validate_flag       = 0;
  52 int version_flag        = 0;
  53 int help_flag           = 0;
  54 int addrs_flag          = -1;
  55 struct getarg_strings extra_addresses;
  56 int anonymous_flag      = 0;
  57 char *lifetime          = NULL;
  58 char *renew_life        = NULL;
  59 char *server_str        = NULL;
  60 char *cred_cache        = NULL;
  61 char *start_str         = NULL;
  62 static int switch_cache_flags = 1;
  63 struct getarg_strings etype_str;
  64 int use_keytab          = 0;
  65 char *keytab_str        = NULL;
  66 int do_afslog           = -1;
  67 int fcache_version;
  68 char *password_file     = NULL;
  69 char *pk_user_id        = NULL;
  70 int pk_enterprise_flag = 0;
  71 struct hx509_certs_data *ent_user_id = NULL;
  72 char *pk_x509_anchors   = NULL;
  73 int pk_use_enckey       = 0;
  74 static int canonicalize_flag = 0;
  75 static int enterprise_flag = 0;
  76 static int ok_as_delegate_flag = 0;
  77 static int use_referrals_flag = 0;
  78 static int windows_flag = 0;
  79 #ifndef NO_NTLM
  80 static char *ntlm_domain;
  81 #endif
  82
  83
  84 static struct getargs args[] = {
  85     /*
  86      * used by MIT
  87      * a: ~A
  88      * V: verbose
  89      * F: ~f
  90      * P: ~p
  91      * C: v4 cache name?
  92      * 5:
  93      *
  94      * old flags
  95      * 4:
  96      * 9:
  97      */
  98     { "afslog",         0  , arg_flag, &do_afslog,
  99       NP_("obtain afs tokens", ""), NULL },
 100
 101     { "cache",          'c', arg_string, &cred_cache,
 102       NP_("credentials cache", ""), "cachename" },
 103
 104     { "forwardable",    0, arg_negative_flag, &forwardable_flag,
 105       NP_("get tickets not forwardable", ""), NULL },
 106
 107     { NULL,             'f', arg_flag, &forwardable_flag,
 108       NP_("get forwardable tickets", ""), NULL },
 109
 110     { "keytab",         't', arg_string, &keytab_str,
 111       NP_("keytab to use", ""), "keytabname" },
 112
 113     { "lifetime",       'l', arg_string, &lifetime,
 114       NP_("lifetime of tickets", ""), "time" },
 115
 116     { "proxiable",      'p', arg_flag, &proxiable_flag,
 117       NP_("get proxiable tickets", ""), NULL },
 118
 119     { "renew",          'R', arg_flag, &renew_flag,
 120       NP_("renew TGT", ""), NULL },
 121
 122     { "renewable",      0,   arg_flag, &renewable_flag,
 123       NP_("get renewable tickets", ""), NULL },
 124
 125     { "renewable-life", 'r', arg_string, &renew_life,
 126       NP_("renewable lifetime of tickets", ""), "time" },
 127
 128     { "server",         'S', arg_string, &server_str,
 129       NP_("server to get ticket for", ""), "principal" },
 130
 131     { "start-time",     's', arg_string, &start_str,
 132       NP_("when ticket gets valid", ""), "time" },
 133
 134     { "use-keytab",     'k', arg_flag, &use_keytab,
 135       NP_("get key from keytab", ""), NULL },
 136
 137     { "validate",       'v', arg_flag, &validate_flag,
 138       NP_("validate TGT", ""), NULL },
 139
 140     { "enctypes",       'e', arg_strings, &etype_str,
 141       NP_("encryption types to use", ""), "enctypes" },
 142
 143     { "fcache-version", 0,   arg_integer, &fcache_version,
 144       NP_("file cache version to create", ""), NULL },
 145
 146     { "addresses",      'A',   arg_negative_flag,       &addrs_flag,
 147       NP_("request a ticket with no addresses", ""), NULL },
 148
 149     { "extra-addresses",'a', arg_strings,       &extra_addresses,
 150       NP_("include these extra addresses", ""), "addresses" },
 151
 152     { "anonymous",      0,   arg_flag,  &anonymous_flag,
 153       NP_("request an anonymous ticket", ""), NULL },
 154
 155     { "request-pac",    0,   arg_flag,  &pac_flag,
 156       NP_("request a Windows PAC", ""), NULL },
 157
 158     { "password-file",  0,   arg_string, &password_file,
 159       NP_("read the password from a file", ""), NULL },
 160
 161     { "canonicalize",0,   arg_flag, &canonicalize_flag,
 162       NP_("canonicalize client principal", ""), NULL },
 163
 164     { "enterprise",0,   arg_flag, &enterprise_flag,
 165       NP_("parse principal as a KRB5-NT-ENTERPRISE name", ""), NULL },
 166 #ifdef PKINIT
 167     { "pk-enterprise",  0,      arg_flag,       &pk_enterprise_flag,
 168       NP_("use enterprise name from certificate", ""), NULL },
 169
 170     { "pk-user",        'C',    arg_string,     &pk_user_id,
 171       NP_("principal's public/private/certificate identifier", ""), "id" },
 172
 173     { "x509-anchors",   'D',  arg_string, &pk_x509_anchors,
 174       NP_("directory with CA certificates", ""), "directory" },
 175
 176     { "pk-use-enckey",  0,  arg_flag, &pk_use_enckey,
 177       NP_("Use RSA encrypted reply (instead of DH)", ""), NULL },
 178 #endif
 179 #ifndef NO_NTLM
 180     { "ntlm-domain",    0,  arg_string, &ntlm_domain,
 181       NP_("NTLM domain", ""), "domain" },
 182 #endif
 183
 184     { "change-default",  0,  arg_negative_flag, &switch_cache_flags,
 185       NP_("switch the default cache to the new credentials cache", ""), NULL },
 186
 187     { "ok-as-delegate", 0,  arg_flag, &ok_as_delegate_flag,
 188       NP_("honor ok-as-delegate on tickets", ""), NULL },
 189
 190     { "use-referrals",  0,  arg_flag, &use_referrals_flag,
 191       NP_("only use referrals, no dns canalisation", ""), NULL },
 192
 193     { "windows",        0,  arg_flag, &windows_flag,
 194       NP_("get windows behavior", ""), NULL },
 195
 196     { "version",        0,   arg_flag, &version_flag, NULL, NULL },
 197     { "help",           0,   arg_flag, &help_flag, NULL, NULL }
 198 };
 199
 200 static void
 201 usage (int ret)
 202 {
 203     arg_printusage_i18n (args,
 204                          sizeof(args)/sizeof(*args),
 205                          N_("Usage: ", ""),
 206                          NULL,
 207                          "[principal [command]]",
 208                          getarg_i18n);
 209     exit (ret);
 210 }
 211
 212 static krb5_error_code
 213 get_server(krb5_context context,
 214            krb5_principal client,
 215            const char *server,
 216            krb5_principal *princ)
 217 {
 218     krb5_const_realm realm;
 219     if(server)
 220         return krb5_parse_name(context, server, princ);
 221
 222     realm = krb5_principal_get_realm(context, client);
 223     return krb5_make_principal(context, princ, realm,
 224                                KRB5_TGS_NAME, realm, NULL);
 225 }
 226
 227 static int
 228 renew_validate(krb5_context context,
 229                int renew,
 230                int validate,
 231                krb5_ccache cache,
 232                const char *server,
 233                krb5_deltat life)
 234 {
 235     krb5_error_code ret;
 236     krb5_creds in, *out = NULL;
 237     krb5_kdc_flags flags;
 238
 239     memset(&in, 0, sizeof(in));
 240
 241     ret = krb5_cc_get_principal(context, cache, &in.client);
 242     if(ret) {
 243         krb5_warn(context, ret, "krb5_cc_get_principal");
 244         return ret;
 245     }
 246     ret = get_server(context, in.client, server, &in.server);
 247     if(ret) {
 248         krb5_warn(context, ret, "get_server");
 249         goto out;
 250     }
 251
 252     if (renew) {
 253         /*
 254          * no need to check the error here, it's only to be
 255          * friendly to the user
 256          */
 257         krb5_get_credentials(context, KRB5_GC_CACHED, cache, &in, &out);
 258     }
 259
 260     flags.i = 0;
 261     flags.b.renewable         = flags.b.renew = renew;
 262     flags.b.validate          = validate;
 263
 264     if (forwardable_flag != -1)
 265         flags.b.forwardable       = forwardable_flag;
 266     else if (out)
 267         flags.b.forwardable       = out->flags.b.forwardable;
 268
 269     if (proxiable_flag != -1)
 270         flags.b.proxiable         = proxiable_flag;
 271     else if (out)
 272         flags.b.proxiable         = out->flags.b.proxiable;
 273
 274     if (anonymous_flag)
 275         flags.b.request_anonymous = anonymous_flag;
 276     if(life)
 277         in.times.endtime = time(NULL) + life;
 278
 279     if (out) {
 280         krb5_free_creds (context, out);
 281         out = NULL;
 282     }
 283
 284
 285     ret = krb5_get_kdc_cred(context,
 286                             cache,
 287                             flags,
 288                             NULL,
 289                             NULL,
 290                             &in,
 291                             &out);
 292     if(ret) {
 293         krb5_warn(context, ret, "krb5_get_kdc_cred");
 294         goto out;
 295     }
 296     ret = krb5_cc_initialize(context, cache, in.client);
 297     if(ret) {
 298         krb5_free_creds (context, out);
 299         krb5_warn(context, ret, "krb5_cc_initialize");
 300         goto out;
 301     }
 302     ret = krb5_cc_store_cred(context, cache, out);
 303
 304     if(ret == 0 && server == NULL) {
 305         /* only do this if it's a general renew-my-tgt request */
 306 #ifndef NO_AFS
 307         if(do_afslog && k_hasafs())
 308             krb5_afslog(context, cache, NULL, NULL);
 309 #endif
 310     }
 311
 312     krb5_free_creds (context, out);
 313     if(ret) {
 314         krb5_warn(context, ret, "krb5_cc_store_cred");
 315         goto out;
 316     }
 317 out:
 318     krb5_free_cred_contents(context, &in);
 319     return ret;
 320 }
 321
 322 #ifndef NO_NTLM
 323
 324 static krb5_error_code
 325 store_ntlmkey(krb5_context context, krb5_ccache id,
 326               const char *domain, struct ntlm_buf *buf)
 327 {
 328     krb5_error_code ret;
 329     krb5_data data;
 330     char *name;
 331
 332     asprintf(&name, "ntlm-key-%s", domain);
 333     if (name == NULL) {
 334         krb5_clear_error_message(context);
 335         return ENOMEM;
 336     }
 337
 338     data.length = buf->length;
 339     data.data = buf->data;
 340
 341     ret = krb5_cc_set_config(context, id, NULL, name, &data);
 342     free(name);
 343     return ret;
 344 }
 345 #endif
 346
 347 static krb5_error_code
 348 get_new_tickets(krb5_context context,
 349                 krb5_principal principal,
 350                 krb5_ccache ccache,
 351                 krb5_deltat ticket_life,
 352                 int interactive)
 353 {
 354     krb5_error_code ret;
 355     krb5_get_init_creds_opt *opt;
 356     krb5_creds cred;
 357     char passwd[256];
 358     krb5_deltat start_time = 0;
 359     krb5_deltat renew = 0;
 360     const char *renewstr = NULL;
 361     krb5_enctype *enctype = NULL;
 362     krb5_ccache tempccache;
 363 #ifndef NO_NTLM
 364     struct ntlm_buf ntlmkey;
 365     memset(&ntlmkey, 0, sizeof(ntlmkey));
 366 #endif
 367     passwd[0] = '\0';
 368
 369     if (password_file) {
 370         FILE *f;
 371
 372         if (strcasecmp("STDIN", password_file) == 0)
 373             f = stdin;
 374         else
 375             f = fopen(password_file, "r");
 376         if (f == NULL)
 377             krb5_errx(context, 1, "Failed to open the password file %s",
 378                       password_file);
 379
 380         if (fgets(passwd, sizeof(passwd), f) == NULL)
 381             krb5_errx(context, 1,
 382                       N_("Failed to read password from file %s", ""),
 383                       password_file);
 384         if (f != stdin)
 385             fclose(f);
 386         passwd[strcspn(passwd, "\n")] = '\0';
 387     }
 388
 389 #ifdef __APPLE__
 390     if (passwd[0] == '\0') {
 391         const char *realm;
 392         OSStatus osret;
 393         UInt32 length;
 394         void *buffer;
 395         char *name;
 396
 397         realm = krb5_principal_get_realm(context, principal);
 398
 399         ret = krb5_unparse_name_flags(context, principal,
 400                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &name);
 401         if (ret)
 402             goto nopassword;
 403
 404         osret = SecKeychainFindGenericPassword(NULL, strlen(realm), realm,
 405                                                strlen(name), name,
 406                                                &length, &buffer, NULL);
 407         free(name);
 408         if (osret == noErr && length < sizeof(passwd) - 1) {
 409             memcpy(passwd, buffer, length);
 410             passwd[length] = '\0';
 411         }
 412     nopassword:
 413         do { } while(0);
 414     }
 415 #endif
 416
 417     memset(&cred, 0, sizeof(cred));
 418
 419     ret = krb5_get_init_creds_opt_alloc (context, &opt);
 420     if (ret)
 421         krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
 422
 423     krb5_get_init_creds_opt_set_default_flags(context, "kinit",
 424         krb5_principal_get_realm(context, principal), opt);
 425
 426     if(forwardable_flag != -1)
 427         krb5_get_init_creds_opt_set_forwardable (opt, forwardable_flag);
 428     if(proxiable_flag != -1)
 429         krb5_get_init_creds_opt_set_proxiable (opt, proxiable_flag);
 430     if(anonymous_flag)
 431         krb5_get_init_creds_opt_set_anonymous (opt, anonymous_flag);
 432     if (pac_flag != -1)
 433         krb5_get_init_creds_opt_set_pac_request(context, opt,
 434                                                 pac_flag ? TRUE : FALSE);
 435     if (canonicalize_flag)
 436         krb5_get_init_creds_opt_set_canonicalize(context, opt, TRUE);
 437     if (pk_enterprise_flag || enterprise_flag || canonicalize_flag || windows_flag)
 438         krb5_get_init_creds_opt_set_win2k(context, opt, TRUE);
 439     if (pk_user_id || ent_user_id || anonymous_flag) {
 440         ret = krb5_get_init_creds_opt_set_pkinit(context, opt,
 441                                                  principal,
 442                                                  pk_user_id,
 443                                                  pk_x509_anchors,
 444                                                  NULL,
 445                                                  NULL,
 446                                                  pk_use_enckey ? 2 : 0 |
 447                                                  anonymous_flag ? 4 : 0,
 448                                                  krb5_prompter_posix,
 449                                                  NULL,
 450                                                  passwd);
 451         if (ret)
 452             krb5_err(context, 1, ret, "krb5_get_init_creds_opt_set_pkinit");
 453         if (ent_user_id)
 454             krb5_get_init_creds_opt_set_pkinit_user_certs(context, opt, ent_user_id);
 455     }
 456
 457     if (addrs_flag != -1)
 458         krb5_get_init_creds_opt_set_addressless(context, opt,
 459                                                 addrs_flag ? FALSE : TRUE);
 460
 461     if (renew_life == NULL && renewable_flag)
 462         renewstr = "1 month";
 463     if (renew_life)
 464         renewstr = renew_life;
 465     if (renewstr) {
 466         renew = parse_time (renewstr, "s");
 467         if (renew < 0)
 468             errx (1, "unparsable time: %s", renewstr);
 469
 470         krb5_get_init_creds_opt_set_renew_life (opt, renew);
 471     }
 472
 473     if(ticket_life != 0)
 474         krb5_get_init_creds_opt_set_tkt_life (opt, ticket_life);
 475
 476     if(start_str) {
 477         int tmp = parse_time (start_str, "s");
 478         if (tmp < 0)
 479             errx (1, N_("unparsable time: %s", ""), start_str);
 480
 481         start_time = tmp;
 482     }
 483
 484     if(etype_str.num_strings) {
 485         int i;
 486
 487         enctype = malloc(etype_str.num_strings * sizeof(*enctype));
 488         if(enctype == NULL)
 489             errx(1, "out of memory");
 490         for(i = 0; i < etype_str.num_strings; i++) {
 491             ret = krb5_string_to_enctype(context,
 492                                          etype_str.strings[i],
 493                                          &enctype[i]);
 494             if(ret)
 495                 errx(1, "unrecognized enctype: %s", etype_str.strings[i]);
 496         }
 497         krb5_get_init_creds_opt_set_etype_list(opt, enctype,
 498                                                etype_str.num_strings);
 499     }
 500
 501     if(use_keytab || keytab_str) {
 502         krb5_keytab kt;
 503         if(keytab_str)
 504             ret = krb5_kt_resolve(context, keytab_str, &kt);
 505         else
 506             ret = krb5_kt_default(context, &kt);
 507         if (ret)
 508             krb5_err (context, 1, ret, "resolving keytab");
 509         ret = krb5_get_init_creds_keytab (context,
 510                                           &cred,
 511                                           principal,
 512                                           kt,
 513                                           start_time,
 514                                           server_str,
 515                                           opt);
 516         krb5_kt_close(context, kt);
 517     } else if (pk_user_id || ent_user_id || anonymous_flag) {
 518         ret = krb5_get_init_creds_password (context,
 519                                             &cred,
 520                                             principal,
 521                                             passwd,
 522                                             krb5_prompter_posix,
 523                                             NULL,
 524                                             start_time,
 525                                             server_str,
 526                                             opt);
 527     } else if (!interactive) {
 528         krb5_warnx(context, "Not interactive, failed to get initial ticket");
 529         krb5_get_init_creds_opt_free(context, opt);
 530         return 0;
 531     } else {
 532
 533         if (passwd[0] == '\0') {
 534             char *p, *prompt;
 535
 536             krb5_unparse_name (context, principal, &p);
 537             asprintf (&prompt, N_("%s's Password: ", ""), p);
 538             free (p);
 539
 540             if (UI_UTIL_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){
 541                 memset(passwd, 0, sizeof(passwd));
 542                 exit(1);
 543             }
 544             free (prompt);
 545         }
 546
 547
 548         ret = krb5_get_init_creds_password (context,
 549                                             &cred,
 550                                             principal,
 551                                             passwd,
 552                                             krb5_prompter_posix,
 553                                             NULL,
 554                                             start_time,
 555                                             server_str,
 556                                             opt);
 557     }
 558     krb5_get_init_creds_opt_free(context, opt);
 559 #ifndef NO_NTLM
 560     if (ntlm_domain && passwd[0])
 561         heim_ntlm_nt_key(passwd, &ntlmkey);
 562 #endif
 563     memset(passwd, 0, sizeof(passwd));
 564
 565     switch(ret){
 566     case 0:
 567         break;
 568     case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */
 569         exit(1);
 570     case KRB5KRB_AP_ERR_BAD_INTEGRITY:
 571     case KRB5KRB_AP_ERR_MODIFIED:
 572     case KRB5KDC_ERR_PREAUTH_FAILED:
 573         krb5_errx(context, 1, N_("Password incorrect", ""));
 574         break;
 575     case KRB5KRB_AP_ERR_V4_REPLY:
 576         krb5_errx(context, 1, N_("Looks like a Kerberos 4 reply", ""));
 577         break;
 578     default:
 579         krb5_err(context, 1, ret, "krb5_get_init_creds");
 580     }
 581
 582     if(ticket_life != 0) {
 583         if(abs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) {
 584             char life[64];
 585             unparse_time_approx(cred.times.endtime - cred.times.starttime,
 586                                 life, sizeof(life));
 587             krb5_warnx(context, N_("NOTICE: ticket lifetime is %s", ""), life);
 588         }
 589     }
 590     if(renew_life) {
 591         if(abs(cred.times.renew_till - cred.times.starttime - renew) > 30) {
 592             char life[64];
 593             unparse_time_approx(cred.times.renew_till - cred.times.starttime,
 594                                 life, sizeof(life));
 595             krb5_warnx(context,
 596                        N_("NOTICE: ticket renewable lifetime is %s", ""),
 597                        life);
 598         }
 599     }
 600
 601     ret = krb5_cc_new_unique(context, krb5_cc_get_type(context, ccache),
 602                              NULL, &tempccache);
 603     if (ret)
 604         krb5_err (context, 1, ret, "krb5_cc_new_unique");
 605
 606     ret = krb5_cc_initialize (context, tempccache, cred.client);
 607     if (ret)
 608         krb5_err (context, 1, ret, "krb5_cc_initialize");
 609
 610     ret = krb5_cc_store_cred (context, tempccache, &cred);
 611     if (ret)
 612         krb5_err (context, 1, ret, "krb5_cc_store_cred");
 613
 614     krb5_free_cred_contents (context, &cred);
 615
 616     ret = krb5_cc_move(context, tempccache, ccache);
 617     if (ret)
 618         krb5_err (context, 1, ret, "krb5_cc_move");
 619
 620     if (switch_cache_flags)
 621         krb5_cc_switch(context, ccache);
 622
 623 #ifndef NO_NTLM
 624     if (ntlm_domain && ntlmkey.data)
 625         store_ntlmkey(context, ccache, ntlm_domain, &ntlmkey);
 626 #endif
 627
 628     if (ok_as_delegate_flag || windows_flag || use_referrals_flag) {
 629         unsigned char d = 0;
 630         krb5_data data;
 631
 632         if (ok_as_delegate_flag || windows_flag)
 633             d |= 1;
 634         if (use_referrals_flag || windows_flag)
 635             d |= 2;
 636
 637         data.length = 1;
 638         data.data = &d;
 639
 640         krb5_cc_set_config(context, ccache, NULL, "realm-config", &data);
 641     }
 642
 643
 644     if (enctype)
 645         free(enctype);
 646
 647     return 0;
 648 }
 649
 650 static time_t
 651 ticket_lifetime(krb5_context context, krb5_ccache cache,
 652                 krb5_principal client, const char *server)
 653 {
 654     krb5_creds in_cred, *cred;
 655     krb5_error_code ret;
 656     time_t timeout;
 657
 658     memset(&in_cred, 0, sizeof(in_cred));
 659
 660     ret = krb5_cc_get_principal(context, cache, &in_cred.client);
 661     if(ret) {
 662         krb5_warn(context, ret, "krb5_cc_get_principal");
 663         return 0;
 664     }
 665     ret = get_server(context, in_cred.client, server, &in_cred.server);
 666     if(ret) {
 667         krb5_free_principal(context, in_cred.client);
 668         krb5_warn(context, ret, "get_server");
 669         return 0;
 670     }
 671
 672     ret = krb5_get_credentials(context, KRB5_GC_CACHED,
 673                                cache, &in_cred, &cred);
 674     krb5_free_principal(context, in_cred.client);
 675     krb5_free_principal(context, in_cred.server);
 676     if(ret) {
 677         krb5_warn(context, ret, "krb5_get_credentials");
 678         return 0;
 679     }
 680     timeout = cred->times.endtime - cred->times.starttime;
 681     if (timeout < 0)
 682         timeout = 0;
 683     krb5_free_creds(context, cred);
 684     return timeout;
 685 }
 686
 687 struct renew_ctx {
 688     krb5_context context;
 689     krb5_ccache  ccache;
 690     krb5_principal principal;
 691     krb5_deltat ticket_life;
 692 };
 693
 694 static time_t
 695 renew_func(void *ptr)
 696 {
 697     struct renew_ctx *ctx = ptr;
 698     krb5_error_code ret;
 699     time_t expire;
 700     int new_tickets = 0;
 701
 702     if (renewable_flag) {
 703         ret = renew_validate(ctx->context, renewable_flag, validate_flag,
 704                              ctx->ccache, server_str, ctx->ticket_life);
 705         if (ret)
 706             new_tickets = 1;
 707     } else
 708         new_tickets = 1;
 709
 710     if (new_tickets)
 711         get_new_tickets(ctx->context, ctx->principal,
 712                         ctx->ccache, ctx->ticket_life, 0);
 713
 714 #ifndef NO_AFS
 715     if(do_afslog && k_hasafs())
 716         krb5_afslog(ctx->context, ctx->ccache, NULL, NULL);
 717 #endif
 718
 719     expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal,
 720                              server_str) / 2;
 721     return expire + 1;
 722 }
 723
 724 int
 725 main (int argc, char **argv)
 726 {
 727     krb5_error_code ret;
 728     krb5_context context;
 729     krb5_ccache  ccache;
 730     krb5_principal principal;
 731     int optidx = 0;
 732     krb5_deltat ticket_life = 0;
 733     int parseflags = 0;
 734
 735     setprogname (argv[0]);
 736
 737     setlocale (LC_ALL, "");
 738     bindtextdomain ("heimdal_kuser", HEIMDAL_LOCALEDIR);
 739     textdomain("heimdal_kuser");
 740
 741     ret = krb5_init_context (&context);
 742     if (ret == KRB5_CONFIG_BADFORMAT)
 743         errx (1, "krb5_init_context failed to parse configuration file");
 744     else if (ret)
 745         errx(1, "krb5_init_context failed: %d", ret);
 746
 747     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 748         usage(1);
 749
 750     if (help_flag)
 751         usage (0);
 752
 753     if(version_flag) {
 754         print_version(NULL);
 755         exit(0);
 756     }
 757
 758     argc -= optidx;
 759     argv += optidx;
 760
 761     if (canonicalize_flag || enterprise_flag)
 762         parseflags |= KRB5_PRINCIPAL_PARSE_ENTERPRISE;
 763
 764     if (pk_enterprise_flag) {
 765         ret = krb5_pk_enterprise_cert(context, pk_user_id,
 766                                       argv[0], &principal,
 767                                       &ent_user_id);
 768         if (ret)
 769             krb5_err(context, 1, ret, "krb5_pk_enterprise_certs");
 770
 771         pk_user_id = NULL;
 772
 773     } else if (anonymous_flag) {
 774
 775         ret = krb5_make_principal(context, &principal, argv[0],
 776                                   KRB5_WELLKNOWN_NAME, KRB5_ANON_NAME,
 777                                   NULL);
 778         if (ret)
 779             krb5_err(context, 1, ret, "krb5_make_principal");
 780         krb5_principal_set_type(context, principal, KRB5_NT_WELLKNOWN);
 781
 782     } else {
 783         if (argv[0]) {
 784             ret = krb5_parse_name_flags (context, argv[0], parseflags,
 785                                          &principal);
 786             if (ret)
 787                 krb5_err (context, 1, ret, "krb5_parse_name");
 788         } else {
 789             ret = krb5_get_default_principal (context, &principal);
 790             if (ret)
 791                 krb5_err (context, 1, ret, "krb5_get_default_principal");
 792         }
 793     }
 794
 795     if(fcache_version)
 796         krb5_set_fcache_version(context, fcache_version);
 797
 798     if(renewable_flag == -1)
 799         /* this seems somewhat pointless, but whatever */
 800         krb5_appdefault_boolean(context, "kinit",
 801                                 krb5_principal_get_realm(context, principal),
 802                                 "renewable", FALSE, &renewable_flag);
 803     if(do_afslog == -1)
 804         krb5_appdefault_boolean(context, "kinit",
 805                                 krb5_principal_get_realm(context, principal),
 806                                 "afslog", TRUE, &do_afslog);
 807
 808     if(cred_cache)
 809         ret = krb5_cc_resolve(context, cred_cache, &ccache);
 810     else {
 811         if(argc > 1) {
 812             char s[1024];
 813             ret = krb5_cc_new_unique(context, NULL, NULL, &ccache);
 814             if(ret)
 815                 krb5_err(context, 1, ret, "creating cred cache");
 816             snprintf(s, sizeof(s), "%s:%s",
 817                      krb5_cc_get_type(context, ccache),
 818                      krb5_cc_get_name(context, ccache));
 819             setenv("KRB5CCNAME", s, 1);
 820         } else {
 821             ret = krb5_cc_cache_match(context, principal, &ccache);
 822             if (ret) {
 823                 const char *type;
 824                 ret = krb5_cc_default (context, &ccache);
 825                 if (ret)
 826                     krb5_err (context, 1, ret, N_("resolving credentials cache", ""));
 827
 828                 /*
 829                  * Check if the type support switching, and we do,
 830                  * then do that instead over overwriting the current
 831                  * default credential
 832                  */
 833                 type = krb5_cc_get_type(context, ccache);
 834                 if (krb5_cc_support_switch(context, type)) {
 835                     krb5_cc_close(context, ccache);
 836                     ret = krb5_cc_new_unique(context, type, NULL, &ccache);
 837                 }
 838             }
 839         }
 840     }
 841     if (ret)
 842         krb5_err (context, 1, ret, N_("resolving credentials cache", ""));
 843
 844 #ifndef NO_AFS
 845     if(argc > 1 && k_hasafs ())
 846         k_setpag();
 847 #endif
 848
 849     if (lifetime) {
 850         int tmp = parse_time (lifetime, "s");
 851         if (tmp < 0)
 852             errx (1, N_("unparsable time: %s", ""), lifetime);
 853
 854         ticket_life = tmp;
 855     }
 856
 857     if(addrs_flag == 0 && extra_addresses.num_strings > 0)
 858         krb5_errx(context, 1,
 859                   N_("specifying both extra addresses and "
 860                      "no addresses makes no sense", ""));
 861     {
 862         int i;
 863         krb5_addresses addresses;
 864         memset(&addresses, 0, sizeof(addresses));
 865         for(i = 0; i < extra_addresses.num_strings; i++) {
 866             ret = krb5_parse_address(context, extra_addresses.strings[i],
 867                                      &addresses);
 868             if (ret == 0) {
 869                 krb5_add_extra_addresses(context, &addresses);
 870                 krb5_free_addresses(context, &addresses);
 871             }
 872         }
 873         free_getarg_strings(&extra_addresses);
 874     }
 875
 876     if(renew_flag || validate_flag) {
 877         ret = renew_validate(context, renew_flag, validate_flag,
 878                              ccache, server_str, ticket_life);
 879         exit(ret != 0);
 880     }
 881
 882     get_new_tickets(context, principal, ccache, ticket_life, 1);
 883
 884 #ifndef NO_AFS
 885     if(do_afslog && k_hasafs())
 886         krb5_afslog(context, ccache, NULL, NULL);
 887 #endif
 888     if(argc > 1) {
 889         struct renew_ctx ctx;
 890         time_t timeout;
 891
 892         timeout = ticket_lifetime(context, ccache, principal, server_str) / 2;
 893
 894         ctx.context = context;
 895         ctx.ccache = ccache;
 896         ctx.principal = principal;
 897         ctx.ticket_life = ticket_life;
 898
 899         ret = simple_execvp_timed(argv[1], argv+1,
 900                                   renew_func, &ctx, timeout);
 901 #define EX_NOEXEC       126
 902 #define EX_NOTFOUND     127
 903         if(ret == EX_NOEXEC)
 904             krb5_warnx(context, N_("permission denied: %s", ""), argv[1]);
 905         else if(ret == EX_NOTFOUND)
 906             krb5_warnx(context, N_("command not found: %s", ""), argv[1]);
 907
 908         krb5_cc_destroy(context, ccache);
 909 #ifndef NO_AFS
 910         if(k_hasafs())
 911             k_unlog();
 912 #endif
 913     } else {
 914         krb5_cc_close (context, ccache);
 915         ret = 0;
 916     }
 917     krb5_free_principal(context, principal);
 918     krb5_free_context (context);
 919     return ret;
 920 }