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 struct krb5_dh_moduli;
  43 struct AlgorithmIdentifier;
  44 struct _krb5_krb_auth_data;
  45 struct hx509_certs_data;
  46 #include <krb5-private.h>
  47
  48 #ifndef NO_NTLM
  49 #include "heimntlm.h"
  50 #endif
  51
  52 int forwardable_flag    = -1;
  53 int proxiable_flag      = -1;
  54 int renewable_flag      = -1;
  55 int renew_flag          = 0;
  56 int pac_flag            = -1;
  57 int validate_flag       = 0;
  58 int version_flag        = 0;
  59 int help_flag           = 0;
  60 int addrs_flag          = -1;
  61 struct getarg_strings extra_addresses;
  62 int anonymous_flag      = 0;
  63 char *lifetime          = NULL;
  64 char *renew_life        = NULL;
  65 char *server_str        = NULL;
  66 char *cred_cache        = NULL;
  67 char *start_str         = NULL;
  68 static int switch_cache_flags = 1;
  69 struct getarg_strings etype_str;
  70 int use_keytab          = 0;
  71 char *keytab_str        = NULL;
  72 int do_afslog           = -1;
  73 int fcache_version;
  74 char *password_file     = NULL;
  75 char *pk_user_id        = NULL;
  76 int pk_enterprise_flag = 0;
  77 struct hx509_certs_data *ent_user_id = NULL;
  78 char *pk_x509_anchors   = NULL;
  79 int pk_use_enckey       = 0;
  80 static int canonicalize_flag = 0;
  81 static int enterprise_flag = 0;
  82 static int ok_as_delegate_flag = 0;
  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", "")  },
 106
 107     { "cache",          'c', arg_string, &cred_cache,
 108       NP_("credentials cache", ""), "cachename" },
 109
 110     { "forwardable",    0, arg_negative_flag, &forwardable_flag,
 111       NP_("get tickets not forwardable", "")},
 112
 113     { NULL,             'f', arg_flag, &forwardable_flag,
 114       NP_("get forwardable tickets", "")},
 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", "") },
 124
 125     { "renew",          'R', arg_flag, &renew_flag,
 126       NP_("renew TGT", "") },
 127
 128     { "renewable",      0,   arg_flag, &renewable_flag,
 129       NP_("get renewable tickets", "") },
 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", "") },
 142
 143     { "validate",       'v', arg_flag, &validate_flag,
 144       NP_("validate TGT", "") },
 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", "") },
 151
 152     { "addresses",      'A',   arg_negative_flag,       &addrs_flag,
 153       NP_("request a ticket with no addresses", "") },
 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", "") },
 160
 161     { "request-pac",    0,   arg_flag,  &pac_flag,
 162       NP_("request a Windows PAC", "") },
 163
 164     { "password-file",  0,   arg_string, &password_file,
 165       NP_("read the password from a file", "") },
 166
 167     { "canonicalize",0,   arg_flag, &canonicalize_flag,
 168       NP_("canonicalize client principal", "") },
 169
 170     { "enterprise",0,   arg_flag, &enterprise_flag,
 171       NP_("parse principal as a KRB5-NT-ENTERPRISE name", "") },
 172 #ifdef PKINIT
 173     { "pk-enterprise",  0,      arg_flag,       &pk_enterprise_flag,
 174       NP_("use enterprise name from certificate", "") },
 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)", "") },
 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", "") },
 192
 193     { "ok-as-delegate", 0,  arg_flag, &ok_as_delegate_flag,
 194       NP_("honor ok-as-delegate on tickets", "") },
 195
 196     { "use-referrals",  0,  arg_flag, &use_referrals_flag,
 197       NP_("only use referrals, no dns canalisation", "") },
 198
 199     { "windows",        0,  arg_flag, &windows_flag,
 200       NP_("get windows behavior", "") },
 201
 202     { "version",        0,   arg_flag, &version_flag },
 203     { "help",           0,   arg_flag, &help_flag }
 204 };
 205
 206 static void
 207 usage (int ret)
 208 {
 209     arg_printusage_i18n (args,
 210                          sizeof(args)/sizeof(*args),
 211                          N_("Usage: ", ""),
 212                          NULL,
 213                          "[principal [command]]",
 214                          getarg_i18n);
 215     exit (ret);
 216 }
 217
 218 static krb5_error_code
 219 get_server(krb5_context context,
 220            krb5_principal client,
 221            const char *server,
 222            krb5_principal *princ)
 223 {
 224     krb5_const_realm realm;
 225     if(server)
 226         return krb5_parse_name(context, server, princ);
 227
 228     realm = krb5_principal_get_realm(context, client);
 229     return krb5_make_principal(context, princ, realm,
 230                                KRB5_TGS_NAME, realm, NULL);
 231 }
 232
 233 static int
 234 renew_validate(krb5_context context,
 235                int renew,
 236                int validate,
 237                krb5_ccache cache,
 238                const char *server,
 239                krb5_deltat life)
 240 {
 241     krb5_error_code ret;
 242     krb5_creds in, *out = NULL;
 243     krb5_kdc_flags flags;
 244
 245     memset(&in, 0, sizeof(in));
 246
 247     ret = krb5_cc_get_principal(context, cache, &in.client);
 248     if(ret) {
 249         krb5_warn(context, ret, "krb5_cc_get_principal");
 250         return ret;
 251     }
 252     ret = get_server(context, in.client, server, &in.server);
 253     if(ret) {
 254         krb5_warn(context, ret, "get_server");
 255         goto out;
 256     }
 257
 258     if (renew) {
 259         /*
 260          * no need to check the error here, it's only to be
 261          * friendly to the user
 262          */
 263         krb5_get_credentials(context, KRB5_GC_CACHED, cache, &in, &out);
 264     }
 265
 266     flags.i = 0;
 267     flags.b.renewable         = flags.b.renew = renew;
 268     flags.b.validate          = validate;
 269
 270     if (forwardable_flag != -1)
 271         flags.b.forwardable       = forwardable_flag;
 272     else if (out)
 273         flags.b.forwardable       = out->flags.b.forwardable;
 274
 275     if (proxiable_flag != -1)
 276         flags.b.proxiable         = proxiable_flag;
 277     else if (out)
 278         flags.b.proxiable         = out->flags.b.proxiable;
 279
 280     if (anonymous_flag)
 281         flags.b.request_anonymous = anonymous_flag;
 282     if(life)
 283         in.times.endtime = time(NULL) + life;
 284
 285     if (out) {
 286         krb5_free_creds (context, out);
 287         out = NULL;
 288     }
 289
 290
 291     ret = krb5_get_kdc_cred(context,
 292                             cache,
 293                             flags,
 294                             NULL,
 295                             NULL,
 296                             &in,
 297                             &out);
 298     if(ret) {
 299         krb5_warn(context, ret, "krb5_get_kdc_cred");
 300         goto out;
 301     }
 302     ret = krb5_cc_initialize(context, cache, in.client);
 303     if(ret) {
 304         krb5_free_creds (context, out);
 305         krb5_warn(context, ret, "krb5_cc_initialize");
 306         goto out;
 307     }
 308     ret = krb5_cc_store_cred(context, cache, out);
 309
 310     if(ret == 0 && server == NULL) {
 311         /* only do this if it's a general renew-my-tgt request */
 312 #ifndef NO_AFS
 313         if(do_afslog && k_hasafs())
 314             krb5_afslog(context, cache, NULL, NULL);
 315 #endif
 316     }
 317
 318     krb5_free_creds (context, out);
 319     if(ret) {
 320         krb5_warn(context, ret, "krb5_cc_store_cred");
 321         goto out;
 322     }
 323 out:
 324     krb5_free_cred_contents(context, &in);
 325     return ret;
 326 }
 327
 328 #ifndef NO_NTLM
 329
 330 static krb5_error_code
 331 store_ntlmkey(krb5_context context, krb5_ccache id,
 332               const char *domain, struct ntlm_buf *buf)
 333 {
 334     krb5_error_code ret;
 335     krb5_data data;
 336     char *name;
 337
 338     asprintf(&name, "ntlm-key-%s", domain);
 339     if (name == NULL) {
 340         krb5_clear_error_message(context);
 341         return ENOMEM;
 342     }
 343
 344     data.length = buf->length;
 345     data.data = buf->data;
 346
 347     ret = krb5_cc_set_config(context, id, NULL, name, &data);
 348     free(name);
 349     return ret;
 350 }
 351 #endif
 352
 353 static krb5_error_code
 354 get_new_tickets(krb5_context context,
 355                 krb5_principal principal,
 356                 krb5_ccache ccache,
 357                 krb5_deltat ticket_life,
 358                 int interactive)
 359 {
 360     krb5_error_code ret;
 361     krb5_get_init_creds_opt *opt;
 362     krb5_creds cred;
 363     char passwd[256];
 364     krb5_deltat start_time = 0;
 365     krb5_deltat renew = 0;
 366     char *renewstr = NULL;
 367     krb5_enctype *enctype = NULL;
 368     krb5_ccache tempccache;
 369 #ifndef NO_NTLM
 370     struct ntlm_buf ntlmkey;
 371     memset(&ntlmkey, 0, sizeof(ntlmkey));
 372 #endif
 373     passwd[0] = '\0';
 374
 375     if (password_file) {
 376         FILE *f;
 377
 378         if (strcasecmp("STDIN", password_file) == 0)
 379             f = stdin;
 380         else
 381             f = fopen(password_file, "r");
 382         if (f == NULL)
 383             krb5_errx(context, 1, "Failed to open the password file %s",
 384                       password_file);
 385
 386         if (fgets(passwd, sizeof(passwd), f) == NULL)
 387             krb5_errx(context, 1,
 388                       N_("Failed to read password from file %s", ""),
 389                       password_file);
 390         if (f != stdin)
 391             fclose(f);
 392         passwd[strcspn(passwd, "\n")] = '\0';
 393     }
 394
 395 #ifdef __APPLE__
 396     if (passwd[0] == '\0') {
 397         const char *realm;
 398         OSStatus osret;
 399         UInt32 length;
 400         void *buffer;
 401         char *name;
 402
 403         realm = krb5_principal_get_realm(context, principal);
 404
 405         ret = krb5_unparse_name_flags(context, principal,
 406                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &name);
 407         if (ret)
 408             goto nopassword;
 409
 410         osret = SecKeychainFindGenericPassword(NULL, strlen(realm), realm,
 411                                                strlen(name), name,
 412                                                &length, &buffer, NULL);
 413         free(name);
 414         if (osret == noErr && length < sizeof(passwd) - 1) {
 415             memcpy(passwd, buffer, length);
 416             passwd[length] = '\0';
 417         }
 418     nopassword:
 419         do { } while(0);
 420     }
 421 #endif
 422
 423     memset(&cred, 0, sizeof(cred));
 424
 425     ret = krb5_get_init_creds_opt_alloc (context, &opt);
 426     if (ret)
 427         krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
 428
 429     krb5_get_init_creds_opt_set_default_flags(context, "kinit",
 430         krb5_principal_get_realm(context, principal), opt);
 431
 432     if(forwardable_flag != -1)
 433         krb5_get_init_creds_opt_set_forwardable (opt, forwardable_flag);
 434     if(proxiable_flag != -1)
 435         krb5_get_init_creds_opt_set_proxiable (opt, proxiable_flag);
 436     if(anonymous_flag)
 437         krb5_get_init_creds_opt_set_anonymous (opt, anonymous_flag);
 438     if (pac_flag != -1)
 439         krb5_get_init_creds_opt_set_pac_request(context, opt,
 440                                                 pac_flag ? TRUE : FALSE);
 441     if (canonicalize_flag)
 442         krb5_get_init_creds_opt_set_canonicalize(context, opt, TRUE);
 443     if ((pk_enterprise_flag || enterprise_flag || canonicalize_flag) && windows_flag)
 444         krb5_get_init_creds_opt_set_win2k(context, opt, TRUE);
 445     if (pk_user_id || ent_user_id || anonymous_flag) {
 446         ret = krb5_get_init_creds_opt_set_pkinit(context, opt,
 447                                                  principal,
 448                                                  pk_user_id,
 449                                                  pk_x509_anchors,
 450                                                  NULL,
 451                                                  NULL,
 452                                                  pk_use_enckey ? 2 : 0 |
 453                                                  anonymous_flag ? 4 : 0,
 454                                                  krb5_prompter_posix,
 455                                                  NULL,
 456                                                  passwd);
 457         if (ret)
 458             krb5_err(context, 1, ret, "krb5_get_init_creds_opt_set_pkinit");
 459         if (ent_user_id)
 460             _krb5_get_init_creds_opt_set_pkinit_user_certs(context, opt, ent_user_id);
 461     }
 462
 463     if (addrs_flag != -1)
 464         krb5_get_init_creds_opt_set_addressless(context, opt,
 465                                                 addrs_flag ? FALSE : TRUE);
 466
 467     if (renew_life == NULL && renewable_flag)
 468         renewstr = "1 month";
 469     if (renew_life)
 470         renewstr = renew_life;
 471     if (renewstr) {
 472         renew = parse_time (renewstr, "s");
 473         if (renew < 0)
 474             errx (1, "unparsable time: %s", renewstr);
 475
 476         krb5_get_init_creds_opt_set_renew_life (opt, renew);
 477     }
 478
 479     if(ticket_life != 0)
 480         krb5_get_init_creds_opt_set_tkt_life (opt, ticket_life);
 481
 482     if(start_str) {
 483         int tmp = parse_time (start_str, "s");
 484         if (tmp < 0)
 485             errx (1, N_("unparsable time: %s", ""), start_str);
 486
 487         start_time = tmp;
 488     }
 489
 490     if(etype_str.num_strings) {
 491         int i;
 492
 493         enctype = malloc(etype_str.num_strings * sizeof(*enctype));
 494         if(enctype == NULL)
 495             errx(1, "out of memory");
 496         for(i = 0; i < etype_str.num_strings; i++) {
 497             ret = krb5_string_to_enctype(context,
 498                                          etype_str.strings[i],
 499                                          &enctype[i]);
 500             if(ret)
 501                 errx(1, "unrecognized enctype: %s", etype_str.strings[i]);
 502         }
 503         krb5_get_init_creds_opt_set_etype_list(opt, enctype,
 504                                                etype_str.num_strings);
 505     }
 506
 507     if(use_keytab || keytab_str) {
 508         krb5_keytab kt;
 509         if(keytab_str)
 510             ret = krb5_kt_resolve(context, keytab_str, &kt);
 511         else
 512             ret = krb5_kt_default(context, &kt);
 513         if (ret)
 514             krb5_err (context, 1, ret, "resolving keytab");
 515         ret = krb5_get_init_creds_keytab (context,
 516                                           &cred,
 517                                           principal,
 518                                           kt,
 519                                           start_time,
 520                                           server_str,
 521                                           opt);
 522         krb5_kt_close(context, kt);
 523     } else if (pk_user_id || ent_user_id || anonymous_flag) {
 524         ret = krb5_get_init_creds_password (context,
 525                                             &cred,
 526                                             principal,
 527                                             passwd,
 528                                             krb5_prompter_posix,
 529                                             NULL,
 530                                             start_time,
 531                                             server_str,
 532                                             opt);
 533     } else if (!interactive) {
 534         krb5_warnx(context, "Not interactive, failed to get initial ticket");
 535         krb5_get_init_creds_opt_free(context, opt);
 536         return 0;
 537     } else {
 538
 539         if (passwd[0] == '\0') {
 540             char *p, *prompt;
 541
 542             krb5_unparse_name (context, principal, &p);
 543             asprintf (&prompt, N_("%s's Password: ", ""), p);
 544             free (p);
 545
 546             if (UI_UTIL_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){
 547                 memset(passwd, 0, sizeof(passwd));
 548                 exit(1);
 549             }
 550             free (prompt);
 551         }
 552
 553
 554         ret = krb5_get_init_creds_password (context,
 555                                             &cred,
 556                                             principal,
 557                                             passwd,
 558                                             krb5_prompter_posix,
 559                                             NULL,
 560                                             start_time,
 561                                             server_str,
 562                                             opt);
 563     }
 564     krb5_get_init_creds_opt_free(context, opt);
 565 #ifndef NO_NTLM
 566     if (ntlm_domain && passwd[0])
 567         heim_ntlm_nt_key(passwd, &ntlmkey);
 568 #endif
 569     memset(passwd, 0, sizeof(passwd));
 570
 571     switch(ret){
 572     case 0:
 573         break;
 574     case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */
 575         exit(1);
 576     case KRB5KRB_AP_ERR_BAD_INTEGRITY:
 577     case KRB5KRB_AP_ERR_MODIFIED:
 578     case KRB5KDC_ERR_PREAUTH_FAILED:
 579         krb5_errx(context, 1, N_("Password incorrect", ""));
 580         break;
 581     case KRB5KRB_AP_ERR_V4_REPLY:
 582         krb5_errx(context, 1, N_("Looks like a Kerberos 4 reply", ""));
 583         break;
 584     default:
 585         krb5_err(context, 1, ret, "krb5_get_init_creds");
 586     }
 587
 588     if(ticket_life != 0) {
 589         if(abs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) {
 590             char life[64];
 591             unparse_time_approx(cred.times.endtime - cred.times.starttime,
 592                                 life, sizeof(life));
 593             krb5_warnx(context, N_("NOTICE: ticket lifetime is %s", ""), life);
 594         }
 595     }
 596     if(renew_life) {
 597         if(abs(cred.times.renew_till - cred.times.starttime - renew) > 30) {
 598             char life[64];
 599             unparse_time_approx(cred.times.renew_till - cred.times.starttime,
 600                                 life, sizeof(life));
 601             krb5_warnx(context,
 602                        N_("NOTICE: ticket renewable lifetime is %s", ""),
 603                        life);
 604         }
 605     }
 606
 607     ret = krb5_cc_new_unique(context, krb5_cc_get_type(context, ccache),
 608                              NULL, &tempccache);
 609     if (ret)
 610         krb5_err (context, 1, ret, "krb5_cc_new_unique");
 611
 612     ret = krb5_cc_initialize (context, tempccache, cred.client);
 613     if (ret)
 614         krb5_err (context, 1, ret, "krb5_cc_initialize");
 615
 616     ret = krb5_cc_store_cred (context, tempccache, &cred);
 617     if (ret)
 618         krb5_err (context, 1, ret, "krb5_cc_store_cred");
 619
 620     krb5_free_cred_contents (context, &cred);
 621
 622     ret = krb5_cc_move(context, tempccache, ccache);
 623     if (ret)
 624         krb5_err (context, 1, ret, "krb5_cc_move");
 625
 626     if (switch_cache_flags)
 627         krb5_cc_switch(context, ccache);
 628
 629 #ifndef NO_NTLM
 630     if (ntlm_domain && ntlmkey.data)
 631         store_ntlmkey(context, ccache, ntlm_domain, &ntlmkey);
 632 #endif
 633
 634     if (ok_as_delegate_flag || windows_flag || use_referrals_flag) {
 635         unsigned char d = 0;
 636         krb5_data data;
 637
 638         if (ok_as_delegate_flag || windows_flag)
 639             d |= 1;
 640         if (use_referrals_flag || windows_flag)
 641             d |= 2;
 642
 643         data.length = 1;
 644         data.data = &d;
 645
 646         krb5_cc_set_config(context, ccache, NULL, "realm-config", &data);
 647     }
 648
 649
 650     if (enctype)
 651         free(enctype);
 652
 653     return 0;
 654 }
 655
 656 static time_t
 657 ticket_lifetime(krb5_context context, krb5_ccache cache,
 658                 krb5_principal client, const char *server)
 659 {
 660     krb5_creds in_cred, *cred;
 661     krb5_error_code ret;
 662     time_t timeout;
 663
 664     memset(&in_cred, 0, sizeof(in_cred));
 665
 666     ret = krb5_cc_get_principal(context, cache, &in_cred.client);
 667     if(ret) {
 668         krb5_warn(context, ret, "krb5_cc_get_principal");
 669         return 0;
 670     }
 671     ret = get_server(context, in_cred.client, server, &in_cred.server);
 672     if(ret) {
 673         krb5_free_principal(context, in_cred.client);
 674         krb5_warn(context, ret, "get_server");
 675         return 0;
 676     }
 677
 678     ret = krb5_get_credentials(context, KRB5_GC_CACHED,
 679                                cache, &in_cred, &cred);
 680     krb5_free_principal(context, in_cred.client);
 681     krb5_free_principal(context, in_cred.server);
 682     if(ret) {
 683         krb5_warn(context, ret, "krb5_get_credentials");
 684         return 0;
 685     }
 686     timeout = cred->times.endtime - cred->times.starttime;
 687     if (timeout < 0)
 688         timeout = 0;
 689     krb5_free_creds(context, cred);
 690     return timeout;
 691 }
 692
 693 struct renew_ctx {
 694     krb5_context context;
 695     krb5_ccache  ccache;
 696     krb5_principal principal;
 697     krb5_deltat ticket_life;
 698 };
 699
 700 static time_t
 701 renew_func(void *ptr)
 702 {
 703     struct renew_ctx *ctx = ptr;
 704     krb5_error_code ret;
 705     time_t expire;
 706     int new_tickets = 0;
 707
 708     if (renewable_flag) {
 709         ret = renew_validate(ctx->context, renewable_flag, validate_flag,
 710                              ctx->ccache, server_str, ctx->ticket_life);
 711         if (ret)
 712             new_tickets = 1;
 713     } else
 714         new_tickets = 1;
 715
 716     if (new_tickets)
 717         get_new_tickets(ctx->context, ctx->principal,
 718                         ctx->ccache, ctx->ticket_life, 0);
 719
 720 #ifndef NO_AFS
 721     if(do_afslog && k_hasafs())
 722         krb5_afslog(ctx->context, ctx->ccache, NULL, NULL);
 723 #endif
 724
 725     expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal,
 726                              server_str) / 2;
 727     return expire + 1;
 728 }
 729
 730 int
 731 main (int argc, char **argv)
 732 {
 733     krb5_error_code ret;
 734     krb5_context context;
 735     krb5_ccache  ccache;
 736     krb5_principal principal;
 737     int optidx = 0;
 738     krb5_deltat ticket_life = 0;
 739     int parseflags = 0;
 740
 741     setprogname (argv[0]);
 742
 743     setlocale (LC_ALL, "");
 744     bindtextdomain ("heimdal_kuser", HEIMDAL_LOCALEDIR);
 745     textdomain("heimdal_kuser");
 746
 747     ret = krb5_init_context (&context);
 748     if (ret == KRB5_CONFIG_BADFORMAT)
 749         errx (1, "krb5_init_context failed to parse configuration file");
 750     else if (ret)
 751         errx(1, "krb5_init_context failed: %d", ret);
 752
 753     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 754         usage(1);
 755
 756     if (help_flag)
 757         usage (0);
 758
 759     if(version_flag) {
 760         print_version(NULL);
 761         exit(0);
 762     }
 763
 764     argc -= optidx;
 765     argv += optidx;
 766
 767     if (canonicalize_flag || enterprise_flag)
 768         parseflags |= KRB5_PRINCIPAL_PARSE_ENTERPRISE;
 769
 770     if (pk_enterprise_flag) {
 771         ret = _krb5_pk_enterprise_cert(context, pk_user_id,
 772                                        argv[0], &principal,
 773                                        &ent_user_id);
 774         if (ret)
 775             krb5_err(context, 1, ret, "krb5_pk_enterprise_certs");
 776
 777         pk_user_id = NULL;
 778
 779     } else if (anonymous_flag) {
 780
 781         ret = krb5_make_principal(context, &principal, argv[0],
 782                                   KRB5_WELLKNOWN_NAME, KRB5_ANON_NAME,
 783                                   NULL);
 784         if (ret)
 785             krb5_err(context, 1, ret, "krb5_make_principal");
 786         krb5_principal_set_type(context, principal, KRB5_NT_WELLKNOWN);
 787
 788     } else {
 789         if (argv[0]) {
 790             ret = krb5_parse_name_flags (context, argv[0], parseflags,
 791                                          &principal);
 792             if (ret)
 793                 krb5_err (context, 1, ret, "krb5_parse_name");
 794         } else {
 795             ret = krb5_get_default_principal (context, &principal);
 796             if (ret)
 797                 krb5_err (context, 1, ret, "krb5_get_default_principal");
 798         }
 799     }
 800
 801     if(fcache_version)
 802         krb5_set_fcache_version(context, fcache_version);
 803
 804     if(renewable_flag == -1)
 805         /* this seems somewhat pointless, but whatever */
 806         krb5_appdefault_boolean(context, "kinit",
 807                                 krb5_principal_get_realm(context, principal),
 808                                 "renewable", FALSE, &renewable_flag);
 809     if(do_afslog == -1)
 810         krb5_appdefault_boolean(context, "kinit",
 811                                 krb5_principal_get_realm(context, principal),
 812                                 "afslog", TRUE, &do_afslog);
 813
 814     if(cred_cache)
 815         ret = krb5_cc_resolve(context, cred_cache, &ccache);
 816     else {
 817         if(argc > 1) {
 818             char s[1024];
 819             ret = krb5_cc_new_unique(context, NULL, NULL, &ccache);
 820             if(ret)
 821                 krb5_err(context, 1, ret, "creating cred cache");
 822             snprintf(s, sizeof(s), "%s:%s",
 823                      krb5_cc_get_type(context, ccache),
 824                      krb5_cc_get_name(context, ccache));
 825             setenv("KRB5CCNAME", s, 1);
 826         } else {
 827             ret = krb5_cc_cache_match(context, principal, &ccache);
 828             if (ret) {
 829                 const char *type;
 830                 ret = krb5_cc_default (context, &ccache);
 831                 if (ret)
 832                     krb5_err (context, 1, ret, N_("resolving credentials cache", ""));
 833
 834                 /*
 835                  * Check if the type support switching, and we do,
 836                  * then do that instead over overwriting the current
 837                  * default credential
 838                  */
 839                 type = krb5_cc_get_type(context, ccache);
 840                 if (krb5_cc_support_switch(context, type)) {
 841                     krb5_cc_close(context, ccache);
 842                     ret = krb5_cc_new_unique(context, type, NULL, &ccache);
 843                 }
 844             }
 845         }
 846     }
 847     if (ret)
 848         krb5_err (context, 1, ret, N_("resolving credentials cache", ""));
 849
 850 #ifndef NO_AFS
 851     if(argc > 1 && k_hasafs ())
 852         k_setpag();
 853 #endif
 854
 855     if (lifetime) {
 856         int tmp = parse_time (lifetime, "s");
 857         if (tmp < 0)
 858             errx (1, N_("unparsable time: %s", ""), lifetime);
 859
 860         ticket_life = tmp;
 861     }
 862
 863     if(addrs_flag == 0 && extra_addresses.num_strings > 0)
 864         krb5_errx(context, 1,
 865                   N_("specifying both extra addresses and "
 866                      "no addresses makes no sense", ""));
 867     {
 868         int i;
 869         krb5_addresses addresses;
 870         memset(&addresses, 0, sizeof(addresses));
 871         for(i = 0; i < extra_addresses.num_strings; i++) {
 872             ret = krb5_parse_address(context, extra_addresses.strings[i],
 873                                      &addresses);
 874             if (ret == 0) {
 875                 krb5_add_extra_addresses(context, &addresses);
 876                 krb5_free_addresses(context, &addresses);
 877             }
 878         }
 879         free_getarg_strings(&extra_addresses);
 880     }
 881
 882     if(renew_flag || validate_flag) {
 883         ret = renew_validate(context, renew_flag, validate_flag,
 884                              ccache, server_str, ticket_life);
 885         exit(ret != 0);
 886     }
 887
 888     get_new_tickets(context, principal, ccache, ticket_life, 1);
 889
 890 #ifndef NO_AFS
 891     if(do_afslog && k_hasafs())
 892         krb5_afslog(context, ccache, NULL, NULL);
 893 #endif
 894     if(argc > 1) {
 895         struct renew_ctx ctx;
 896         time_t timeout;
 897
 898         timeout = ticket_lifetime(context, ccache, principal, server_str) / 2;
 899
 900         ctx.context = context;
 901         ctx.ccache = ccache;
 902         ctx.principal = principal;
 903         ctx.ticket_life = ticket_life;
 904
 905         ret = simple_execvp_timed(argv[1], argv+1,
 906                                   renew_func, &ctx, timeout);
 907 #define EX_NOEXEC       126
 908 #define EX_NOTFOUND     127
 909         if(ret == EX_NOEXEC)
 910             krb5_warnx(context, N_("permission denied: %s", ""), argv[1]);
 911         else if(ret == EX_NOTFOUND)
 912             krb5_warnx(context, N_("command not found: %s", ""), argv[1]);
 913
 914         krb5_cc_destroy(context, ccache);
 915 #ifndef NO_AFS
 916         if(k_hasafs())
 917             k_unlog();
 918 #endif
 919     } else {
 920         krb5_cc_close (context, ccache);
 921         ret = 0;
 922     }
 923     krb5_free_principal(context, principal);
 924     krb5_free_context (context);
 925     return ret;
 926 }