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",    'f', arg_negative_flag, &forwardable_flag,
 111       NP_("get forwardable tickets", "")},
 112
 113     { "keytab",         't', arg_string, &keytab_str,
 114       NP_("keytab to use", ""), "keytabname" },
 115
 116     { "lifetime",       'l', arg_string, &lifetime,
 117       NP_("lifetime of tickets", ""), "time"},
 118
 119     { "proxiable",      'p', arg_flag, &proxiable_flag,
 120       NP_("get proxiable tickets", "") },
 121
 122     { "renew",          'R', arg_flag, &renew_flag,
 123       NP_("renew TGT", "") },
 124
 125     { "renewable",      0,   arg_flag, &renewable_flag,
 126       NP_("get renewable tickets", "") },
 127
 128     { "renewable-life", 'r', arg_string, &renew_life,
 129       NP_("renewable lifetime of tickets", ""), "time" },
 130
 131     { "server",         'S', arg_string, &server_str,
 132       NP_("server to get ticket for", ""), "principal" },
 133
 134     { "start-time",     's', arg_string, &start_str,
 135       NP_("when ticket gets valid", ""), "time" },
 136
 137     { "use-keytab",     'k', arg_flag, &use_keytab,
 138       NP_("get key from keytab", "") },
 139
 140     { "validate",       'v', arg_flag, &validate_flag,
 141       NP_("validate TGT", "") },
 142
 143     { "enctypes",       'e', arg_strings, &etype_str,
 144       NP_("encryption types to use", ""), "enctypes" },
 145
 146     { "fcache-version", 0,   arg_integer, &fcache_version,
 147       NP_("file cache version to create", "") },
 148
 149     { "addresses",      'A',   arg_negative_flag,       &addrs_flag,
 150       NP_("request a ticket with no addresses", "") },
 151
 152     { "extra-addresses",'a', arg_strings,       &extra_addresses,
 153       NP_("include these extra addresses", ""), "addresses" },
 154
 155     { "anonymous",      0,   arg_flag,  &anonymous_flag,
 156       NP_("request an anonymous ticket", "") },
 157
 158     { "request-pac",    0,   arg_flag,  &pac_flag,
 159       NP_("request a Windows PAC", "") },
 160
 161     { "password-file",  0,   arg_string, &password_file,
 162       NP_("read the password from a file", "") },
 163
 164     { "canonicalize",0,   arg_flag, &canonicalize_flag,
 165       NP_("canonicalize client principal", "") },
 166
 167     { "enterprise",0,   arg_flag, &enterprise_flag,
 168       NP_("parse principal as a KRB5-NT-ENTERPRISE name", "") },
 169 #ifdef PKINIT
 170     { "pk-enterprise",  0,      arg_flag,       &pk_enterprise_flag,
 171       NP_("use enterprise name from certificate", "") },
 172
 173     { "pk-user",        'C',    arg_string,     &pk_user_id,
 174       NP_("principal's public/private/certificate identifier", ""), "id" },
 175
 176     { "x509-anchors",   'D',  arg_string, &pk_x509_anchors,
 177       NP_("directory with CA certificates", ""), "directory" },
 178
 179     { "pk-use-enckey",  0,  arg_flag, &pk_use_enckey,
 180       NP_("Use RSA encrypted reply (instead of DH)", "") },
 181 #endif
 182 #ifndef NO_NTLM
 183     { "ntlm-domain",    0,  arg_string, &ntlm_domain,
 184       NP_("NTLM domain", ""), "domain" },
 185 #endif
 186
 187     { "change-default",  0,  arg_negative_flag, &switch_cache_flags,
 188       NP_("switch the default cache to the new credentials cache", "") },
 189
 190     { "ok-as-delegate", 0,  arg_flag, &ok_as_delegate_flag,
 191       NP_("honor ok-as-delegate on tickets", "") },
 192
 193     { "use-referrals",  0,  arg_flag, &use_referrals_flag,
 194       NP_("only use referrals, no dns canalisation", "") },
 195
 196     { "windows",        0,  arg_flag, &windows_flag,
 197       NP_("get windows behavior", "") },
 198
 199     { "version",        0,   arg_flag, &version_flag },
 200     { "help",           0,   arg_flag, &help_flag }
 201 };
 202
 203 static void
 204 usage (int ret)
 205 {
 206     arg_printusage_i18n (args,
 207                          sizeof(args)/sizeof(*args),
 208                          N_("Usage: ", ""),
 209                          NULL,
 210                          "[principal [command]]",
 211                          getarg_i18n);
 212     exit (ret);
 213 }
 214
 215 static krb5_error_code
 216 get_server(krb5_context context,
 217            krb5_principal client,
 218            const char *server,
 219            krb5_principal *princ)
 220 {
 221     krb5_const_realm realm;
 222     if(server)
 223         return krb5_parse_name(context, server, princ);
 224
 225     realm = krb5_principal_get_realm(context, client);
 226     return krb5_make_principal(context, princ, realm,
 227                                KRB5_TGS_NAME, realm, NULL);
 228 }
 229
 230 static int
 231 renew_validate(krb5_context context,
 232                int renew,
 233                int validate,
 234                krb5_ccache cache,
 235                const char *server,
 236                krb5_deltat life)
 237 {
 238     krb5_error_code ret;
 239     krb5_creds in, *out = NULL;
 240     krb5_kdc_flags flags;
 241
 242     memset(&in, 0, sizeof(in));
 243
 244     ret = krb5_cc_get_principal(context, cache, &in.client);
 245     if(ret) {
 246         krb5_warn(context, ret, "krb5_cc_get_principal");
 247         return ret;
 248     }
 249     ret = get_server(context, in.client, server, &in.server);
 250     if(ret) {
 251         krb5_warn(context, ret, "get_server");
 252         goto out;
 253     }
 254
 255     if (renew) {
 256         /*
 257          * no need to check the error here, it's only to be
 258          * friendly to the user
 259          */
 260         krb5_get_credentials(context, KRB5_GC_CACHED, cache, &in, &out);
 261     }
 262
 263     flags.i = 0;
 264     flags.b.renewable         = flags.b.renew = renew;
 265     flags.b.validate          = validate;
 266
 267     if (forwardable_flag != -1)
 268         flags.b.forwardable       = forwardable_flag;
 269     else if (out)
 270         flags.b.forwardable       = out->flags.b.forwardable;
 271
 272     if (proxiable_flag != -1)
 273         flags.b.proxiable         = proxiable_flag;
 274     else if (out)
 275         flags.b.proxiable         = out->flags.b.proxiable;
 276
 277     if (anonymous_flag)
 278         flags.b.request_anonymous = anonymous_flag;
 279     if(life)
 280         in.times.endtime = time(NULL) + life;
 281
 282     if (out) {
 283         krb5_free_creds (context, out);
 284         out = NULL;
 285     }
 286
 287
 288     ret = krb5_get_kdc_cred(context,
 289                             cache,
 290                             flags,
 291                             NULL,
 292                             NULL,
 293                             &in,
 294                             &out);
 295     if(ret) {
 296         krb5_warn(context, ret, "krb5_get_kdc_cred");
 297         goto out;
 298     }
 299     ret = krb5_cc_initialize(context, cache, in.client);
 300     if(ret) {
 301         krb5_free_creds (context, out);
 302         krb5_warn(context, ret, "krb5_cc_initialize");
 303         goto out;
 304     }
 305     ret = krb5_cc_store_cred(context, cache, out);
 306
 307     if(ret == 0 && server == NULL) {
 308         /* only do this if it's a general renew-my-tgt request */
 309 #ifndef NO_AFS
 310         if(do_afslog && k_hasafs())
 311             krb5_afslog(context, cache, NULL, NULL);
 312 #endif
 313     }
 314
 315     krb5_free_creds (context, out);
 316     if(ret) {
 317         krb5_warn(context, ret, "krb5_cc_store_cred");
 318         goto out;
 319     }
 320 out:
 321     krb5_free_cred_contents(context, &in);
 322     return ret;
 323 }
 324
 325 #ifndef NO_NTLM
 326
 327 static krb5_error_code
 328 store_ntlmkey(krb5_context context, krb5_ccache id,
 329               const char *domain, struct ntlm_buf *buf)
 330 {
 331     krb5_error_code ret;
 332     krb5_data data;
 333     char *name;
 334
 335     asprintf(&name, "ntlm-key-%s", domain);
 336     if (name == NULL) {
 337         krb5_clear_error_message(context);
 338         return ENOMEM;
 339     }
 340
 341     data.length = buf->length;
 342     data.data = buf->data;
 343
 344     ret = krb5_cc_set_config(context, id, NULL, name, &data);
 345     free(name);
 346     return ret;
 347 }
 348 #endif
 349
 350 static krb5_error_code
 351 get_new_tickets(krb5_context context,
 352                 krb5_principal principal,
 353                 krb5_ccache ccache,
 354                 krb5_deltat ticket_life,
 355                 int interactive)
 356 {
 357     krb5_error_code ret;
 358     krb5_get_init_creds_opt *opt;
 359     krb5_creds cred;
 360     char passwd[256];
 361     krb5_deltat start_time = 0;
 362     krb5_deltat renew = 0;
 363     char *renewstr = NULL;
 364     krb5_enctype *enctype = NULL;
 365     krb5_ccache tempccache;
 366 #ifndef NO_NTLM
 367     struct ntlm_buf ntlmkey;
 368     memset(&ntlmkey, 0, sizeof(ntlmkey));
 369 #endif
 370     passwd[0] = '\0';
 371
 372     if (password_file) {
 373         FILE *f;
 374
 375         if (strcasecmp("STDIN", password_file) == 0)
 376             f = stdin;
 377         else
 378             f = fopen(password_file, "r");
 379         if (f == NULL)
 380             krb5_errx(context, 1, "Failed to open the password file %s",
 381                       password_file);
 382
 383         if (fgets(passwd, sizeof(passwd), f) == NULL)
 384             krb5_errx(context, 1,
 385                       N_("Failed to read password from file %s", ""),
 386                       password_file);
 387         if (f != stdin)
 388             fclose(f);
 389         passwd[strcspn(passwd, "\n")] = '\0';
 390     }
 391
 392 #ifdef __APPLE__
 393     if (passwd[0] == '\0') {
 394         const char *realm;
 395         OSStatus osret;
 396         UInt32 length;
 397         void *buffer;
 398         char *name;
 399
 400         realm = krb5_principal_get_realm(context, principal);
 401
 402         ret = krb5_unparse_name_flags(context, principal,
 403                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &name);
 404         if (ret)
 405             goto nopassword;
 406
 407         osret = SecKeychainFindGenericPassword(NULL, strlen(realm), realm,
 408                                                strlen(name), name,
 409                                                &length, &buffer, NULL);
 410         free(name);
 411         if (osret == noErr && length < sizeof(passwd) - 1) {
 412             memcpy(passwd, buffer, length);
 413             passwd[length] = '\0';
 414         }
 415     nopassword:
 416         do { } while(0);
 417     }
 418 #endif
 419
 420     memset(&cred, 0, sizeof(cred));
 421
 422     ret = krb5_get_init_creds_opt_alloc (context, &opt);
 423     if (ret)
 424         krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
 425
 426     krb5_get_init_creds_opt_set_default_flags(context, "kinit",
 427         krb5_principal_get_realm(context, principal), opt);
 428
 429     if(forwardable_flag != -1)
 430         krb5_get_init_creds_opt_set_forwardable (opt, forwardable_flag);
 431     if(proxiable_flag != -1)
 432         krb5_get_init_creds_opt_set_proxiable (opt, proxiable_flag);
 433     if(anonymous_flag)
 434         krb5_get_init_creds_opt_set_anonymous (opt, anonymous_flag);
 435     if (pac_flag != -1)
 436         krb5_get_init_creds_opt_set_pac_request(context, opt,
 437                                                 pac_flag ? TRUE : FALSE);
 438     if (canonicalize_flag)
 439         krb5_get_init_creds_opt_set_canonicalize(context, opt, TRUE);
 440     if ((pk_enterprise_flag || enterprise_flag || canonicalize_flag) && windows_flag)
 441         krb5_get_init_creds_opt_set_win2k(context, opt, TRUE);
 442     if (pk_user_id || ent_user_id || anonymous_flag) {
 443         ret = krb5_get_init_creds_opt_set_pkinit(context, opt,
 444                                                  principal,
 445                                                  pk_user_id,
 446                                                  pk_x509_anchors,
 447                                                  NULL,
 448                                                  NULL,
 449                                                  pk_use_enckey ? 2 : 0 |
 450                                                  anonymous_flag ? 4 : 0,
 451                                                  krb5_prompter_posix,
 452                                                  NULL,
 453                                                  passwd);
 454         if (ret)
 455             krb5_err(context, 1, ret, "krb5_get_init_creds_opt_set_pkinit");
 456         if (ent_user_id)
 457             _krb5_get_init_creds_opt_set_pkinit_user_certs(context, opt, ent_user_id);
 458     }
 459
 460     if (addrs_flag != -1)
 461         krb5_get_init_creds_opt_set_addressless(context, opt,
 462                                                 addrs_flag ? FALSE : TRUE);
 463
 464     if (renew_life == NULL && renewable_flag)
 465         renewstr = "1 month";
 466     if (renew_life)
 467         renewstr = renew_life;
 468     if (renewstr) {
 469         renew = parse_time (renewstr, "s");
 470         if (renew < 0)
 471             errx (1, "unparsable time: %s", renewstr);
 472
 473         krb5_get_init_creds_opt_set_renew_life (opt, renew);
 474     }
 475
 476     if(ticket_life != 0)
 477         krb5_get_init_creds_opt_set_tkt_life (opt, ticket_life);
 478
 479     if(start_str) {
 480         int tmp = parse_time (start_str, "s");
 481         if (tmp < 0)
 482             errx (1, N_("unparsable time: %s", ""), start_str);
 483
 484         start_time = tmp;
 485     }
 486
 487     if(etype_str.num_strings) {
 488         int i;
 489
 490         enctype = malloc(etype_str.num_strings * sizeof(*enctype));
 491         if(enctype == NULL)
 492             errx(1, "out of memory");
 493         for(i = 0; i < etype_str.num_strings; i++) {
 494             ret = krb5_string_to_enctype(context,
 495                                          etype_str.strings[i],
 496                                          &enctype[i]);
 497             if(ret)
 498                 errx(1, "unrecognized enctype: %s", etype_str.strings[i]);
 499         }
 500         krb5_get_init_creds_opt_set_etype_list(opt, enctype,
 501                                                etype_str.num_strings);
 502     }
 503
 504     if(use_keytab || keytab_str) {
 505         krb5_keytab kt;
 506         if(keytab_str)
 507             ret = krb5_kt_resolve(context, keytab_str, &kt);
 508         else
 509             ret = krb5_kt_default(context, &kt);
 510         if (ret)
 511             krb5_err (context, 1, ret, "resolving keytab");
 512         ret = krb5_get_init_creds_keytab (context,
 513                                           &cred,
 514                                           principal,
 515                                           kt,
 516                                           start_time,
 517                                           server_str,
 518                                           opt);
 519         krb5_kt_close(context, kt);
 520     } else if (pk_user_id || ent_user_id || anonymous_flag) {
 521         ret = krb5_get_init_creds_password (context,
 522                                             &cred,
 523                                             principal,
 524                                             passwd,
 525                                             krb5_prompter_posix,
 526                                             NULL,
 527                                             start_time,
 528                                             server_str,
 529                                             opt);
 530     } else if (!interactive) {
 531         krb5_warnx(context, "Not interactive, failed to get initial ticket");
 532         krb5_get_init_creds_opt_free(context, opt);
 533         return 0;
 534     } else {
 535
 536         if (passwd[0] == '\0') {
 537             char *p, *prompt;
 538
 539             krb5_unparse_name (context, principal, &p);
 540             asprintf (&prompt, N_("%s's Password: ", ""), p);
 541             free (p);
 542
 543             if (UI_UTIL_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){
 544                 memset(passwd, 0, sizeof(passwd));
 545                 exit(1);
 546             }
 547             free (prompt);
 548         }
 549
 550
 551         ret = krb5_get_init_creds_password (context,
 552                                             &cred,
 553                                             principal,
 554                                             passwd,
 555                                             krb5_prompter_posix,
 556                                             NULL,
 557                                             start_time,
 558                                             server_str,
 559                                             opt);
 560     }
 561     krb5_get_init_creds_opt_free(context, opt);
 562 #ifndef NO_NTLM
 563     if (ntlm_domain && passwd[0])
 564         heim_ntlm_nt_key(passwd, &ntlmkey);
 565 #endif
 566     memset(passwd, 0, sizeof(passwd));
 567
 568     switch(ret){
 569     case 0:
 570         break;
 571     case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */
 572         exit(1);
 573     case KRB5KRB_AP_ERR_BAD_INTEGRITY:
 574     case KRB5KRB_AP_ERR_MODIFIED:
 575     case KRB5KDC_ERR_PREAUTH_FAILED:
 576         krb5_errx(context, 1, N_("Password incorrect", ""));
 577         break;
 578     case KRB5KRB_AP_ERR_V4_REPLY:
 579         krb5_errx(context, 1, N_("Looks like a Kerberos 4 reply", ""));
 580         break;
 581     default:
 582         krb5_err(context, 1, ret, "krb5_get_init_creds");
 583     }
 584
 585     if(ticket_life != 0) {
 586         if(abs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) {
 587             char life[64];
 588             unparse_time_approx(cred.times.endtime - cred.times.starttime,
 589                                 life, sizeof(life));
 590             krb5_warnx(context, N_("NOTICE: ticket lifetime is %s", ""), life);
 591         }
 592     }
 593     if(renew_life) {
 594         if(abs(cred.times.renew_till - cred.times.starttime - renew) > 30) {
 595             char life[64];
 596             unparse_time_approx(cred.times.renew_till - cred.times.starttime,
 597                                 life, sizeof(life));
 598             krb5_warnx(context,
 599                        N_("NOTICE: ticket renewable lifetime is %s", ""),
 600                        life);
 601         }
 602     }
 603
 604     ret = krb5_cc_new_unique(context, krb5_cc_get_type(context, ccache),
 605                              NULL, &tempccache);
 606     if (ret)
 607         krb5_err (context, 1, ret, "krb5_cc_new_unique");
 608
 609     ret = krb5_cc_initialize (context, tempccache, cred.client);
 610     if (ret)
 611         krb5_err (context, 1, ret, "krb5_cc_initialize");
 612
 613     ret = krb5_cc_store_cred (context, tempccache, &cred);
 614     if (ret)
 615         krb5_err (context, 1, ret, "krb5_cc_store_cred");
 616
 617     krb5_free_cred_contents (context, &cred);
 618
 619     ret = krb5_cc_move(context, tempccache, ccache);
 620     if (ret)
 621         krb5_err (context, 1, ret, "krb5_cc_move");
 622
 623     if (switch_cache_flags)
 624         krb5_cc_switch(context, ccache);
 625
 626 #ifndef NO_NTLM
 627     if (ntlm_domain && ntlmkey.data)
 628         store_ntlmkey(context, ccache, ntlm_domain, &ntlmkey);
 629 #endif
 630
 631     if (ok_as_delegate_flag || windows_flag || use_referrals_flag) {
 632         unsigned char d = 0;
 633         krb5_data data;
 634
 635         if (ok_as_delegate_flag || windows_flag)
 636             d |= 1;
 637         if (use_referrals_flag || windows_flag)
 638             d |= 2;
 639
 640         data.length = 1;
 641         data.data = &d;
 642
 643         krb5_cc_set_config(context, ccache, NULL, "realm-config", &data);
 644     }
 645
 646
 647     if (enctype)
 648         free(enctype);
 649
 650     return 0;
 651 }
 652
 653 static time_t
 654 ticket_lifetime(krb5_context context, krb5_ccache cache,
 655                 krb5_principal client, const char *server)
 656 {
 657     krb5_creds in_cred, *cred;
 658     krb5_error_code ret;
 659     time_t timeout;
 660
 661     memset(&in_cred, 0, sizeof(in_cred));
 662
 663     ret = krb5_cc_get_principal(context, cache, &in_cred.client);
 664     if(ret) {
 665         krb5_warn(context, ret, "krb5_cc_get_principal");
 666         return 0;
 667     }
 668     ret = get_server(context, in_cred.client, server, &in_cred.server);
 669     if(ret) {
 670         krb5_free_principal(context, in_cred.client);
 671         krb5_warn(context, ret, "get_server");
 672         return 0;
 673     }
 674
 675     ret = krb5_get_credentials(context, KRB5_GC_CACHED,
 676                                cache, &in_cred, &cred);
 677     krb5_free_principal(context, in_cred.client);
 678     krb5_free_principal(context, in_cred.server);
 679     if(ret) {
 680         krb5_warn(context, ret, "krb5_get_credentials");
 681         return 0;
 682     }
 683     timeout = cred->times.endtime - cred->times.starttime;
 684     if (timeout < 0)
 685         timeout = 0;
 686     krb5_free_creds(context, cred);
 687     return timeout;
 688 }
 689
 690 struct renew_ctx {
 691     krb5_context context;
 692     krb5_ccache  ccache;
 693     krb5_principal principal;
 694     krb5_deltat ticket_life;
 695 };
 696
 697 static time_t
 698 renew_func(void *ptr)
 699 {
 700     struct renew_ctx *ctx = ptr;
 701     krb5_error_code ret;
 702     time_t expire;
 703     int new_tickets = 0;
 704
 705     if (renewable_flag) {
 706         ret = renew_validate(ctx->context, renewable_flag, validate_flag,
 707                              ctx->ccache, server_str, ctx->ticket_life);
 708         if (ret)
 709             new_tickets = 1;
 710     } else
 711         new_tickets = 1;
 712
 713     if (new_tickets)
 714         get_new_tickets(ctx->context, ctx->principal,
 715                         ctx->ccache, ctx->ticket_life, 0);
 716
 717 #ifndef NO_AFS
 718     if(do_afslog && k_hasafs())
 719         krb5_afslog(ctx->context, ctx->ccache, NULL, NULL);
 720 #endif
 721
 722     expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal,
 723                              server_str) / 2;
 724     return expire + 1;
 725 }
 726
 727 int
 728 main (int argc, char **argv)
 729 {
 730     krb5_error_code ret;
 731     krb5_context context;
 732     krb5_ccache  ccache;
 733     krb5_principal principal;
 734     int optidx = 0;
 735     krb5_deltat ticket_life = 0;
 736     int parseflags = 0;
 737
 738     setprogname (argv[0]);
 739
 740     setlocale (LC_ALL, "");
 741     bindtextdomain ("heimdal_kuser", HEIMDAL_LOCALEDIR);
 742     textdomain("heimdal_kuser");
 743
 744     ret = krb5_init_context (&context);
 745     if (ret == KRB5_CONFIG_BADFORMAT)
 746         errx (1, "krb5_init_context failed to parse configuration file");
 747     else if (ret)
 748         errx(1, "krb5_init_context failed: %d", ret);
 749
 750     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 751         usage(1);
 752
 753     if (help_flag)
 754         usage (0);
 755
 756     if(version_flag) {
 757         print_version(NULL);
 758         exit(0);
 759     }
 760
 761     argc -= optidx;
 762     argv += optidx;
 763
 764     if (canonicalize_flag || enterprise_flag)
 765         parseflags |= KRB5_PRINCIPAL_PARSE_ENTERPRISE;
 766
 767     if (pk_enterprise_flag) {
 768         ret = _krb5_pk_enterprise_cert(context, pk_user_id,
 769                                        argv[0], &principal,
 770                                        &ent_user_id);
 771         if (ret)
 772             krb5_err(context, 1, ret, "krb5_pk_enterprise_certs");
 773
 774         pk_user_id = NULL;
 775
 776     } else if (anonymous_flag) {
 777
 778         ret = krb5_make_principal(context, &principal, argv[0],
 779                                   KRB5_WELLKNOWN_NAME, KRB5_ANON_NAME,
 780                                   NULL);
 781         if (ret)
 782             krb5_err(context, 1, ret, "krb5_make_principal");
 783         krb5_principal_set_type(context, principal, KRB5_NT_WELLKNOWN);
 784
 785     } else {
 786         if (argv[0]) {
 787             ret = krb5_parse_name_flags (context, argv[0], parseflags,
 788                                          &principal);
 789             if (ret)
 790                 krb5_err (context, 1, ret, "krb5_parse_name");
 791         } else {
 792             ret = krb5_get_default_principal (context, &principal);
 793             if (ret)
 794                 krb5_err (context, 1, ret, "krb5_get_default_principal");
 795         }
 796     }
 797
 798     if(fcache_version)
 799         krb5_set_fcache_version(context, fcache_version);
 800
 801     if(renewable_flag == -1)
 802         /* this seems somewhat pointless, but whatever */
 803         krb5_appdefault_boolean(context, "kinit",
 804                                 krb5_principal_get_realm(context, principal),
 805                                 "renewable", FALSE, &renewable_flag);
 806     if(do_afslog == -1)
 807         krb5_appdefault_boolean(context, "kinit",
 808                                 krb5_principal_get_realm(context, principal),
 809                                 "afslog", TRUE, &do_afslog);
 810
 811     if(cred_cache)
 812         ret = krb5_cc_resolve(context, cred_cache, &ccache);
 813     else {
 814         if(argc > 1) {
 815             char s[1024];
 816             ret = krb5_cc_new_unique(context, NULL, NULL, &ccache);
 817             if(ret)
 818                 krb5_err(context, 1, ret, "creating cred cache");
 819             snprintf(s, sizeof(s), "%s:%s",
 820                      krb5_cc_get_type(context, ccache),
 821                      krb5_cc_get_name(context, ccache));
 822             setenv("KRB5CCNAME", s, 1);
 823         } else {
 824             ret = krb5_cc_cache_match(context, principal, &ccache);
 825             if (ret) {
 826                 const char *type;
 827                 ret = krb5_cc_default (context, &ccache);
 828                 if (ret)
 829                     krb5_err (context, 1, ret, N_("resolving credentials cache", ""));
 830
 831                 /*
 832                  * Check if the type support switching, and we do,
 833                  * then do that instead over overwriting the current
 834                  * default credential
 835                  */
 836                 type = krb5_cc_get_type(context, ccache);
 837                 if (krb5_cc_support_switch(context, type)) {
 838                     krb5_cc_close(context, ccache);
 839                     ret = krb5_cc_new_unique(context, type, NULL, &ccache);
 840                 }
 841             }
 842         }
 843     }
 844     if (ret)
 845         krb5_err (context, 1, ret, N_("resolving credentials cache", ""));
 846
 847 #ifndef NO_AFS
 848     if(argc > 1 && k_hasafs ())
 849         k_setpag();
 850 #endif
 851
 852     if (lifetime) {
 853         int tmp = parse_time (lifetime, "s");
 854         if (tmp < 0)
 855             errx (1, N_("unparsable time: %s", ""), lifetime);
 856
 857         ticket_life = tmp;
 858     }
 859
 860     if(addrs_flag == 0 && extra_addresses.num_strings > 0)
 861         krb5_errx(context, 1,
 862                   N_("specifying both extra addresses and "
 863                      "no addresses makes no sense", ""));
 864     {
 865         int i;
 866         krb5_addresses addresses;
 867         memset(&addresses, 0, sizeof(addresses));
 868         for(i = 0; i < extra_addresses.num_strings; i++) {
 869             ret = krb5_parse_address(context, extra_addresses.strings[i],
 870                                      &addresses);
 871             if (ret == 0) {
 872                 krb5_add_extra_addresses(context, &addresses);
 873                 krb5_free_addresses(context, &addresses);
 874             }
 875         }
 876         free_getarg_strings(&extra_addresses);
 877     }
 878
 879     if(renew_flag || validate_flag) {
 880         ret = renew_validate(context, renew_flag, validate_flag,
 881                              ccache, server_str, ticket_life);
 882         exit(ret != 0);
 883     }
 884
 885     get_new_tickets(context, principal, ccache, ticket_life, 1);
 886
 887 #ifndef NO_AFS
 888     if(do_afslog && k_hasafs())
 889         krb5_afslog(context, ccache, NULL, NULL);
 890 #endif
 891     if(argc > 1) {
 892         struct renew_ctx ctx;
 893         time_t timeout;
 894
 895         timeout = ticket_lifetime(context, ccache, principal, server_str) / 2;
 896
 897         ctx.context = context;
 898         ctx.ccache = ccache;
 899         ctx.principal = principal;
 900         ctx.ticket_life = ticket_life;
 901
 902         ret = simple_execvp_timed(argv[1], argv+1,
 903                                   renew_func, &ctx, timeout);
 904 #define EX_NOEXEC       126
 905 #define EX_NOTFOUND     127
 906         if(ret == EX_NOEXEC)
 907             krb5_warnx(context, N_("permission denied: %s", ""), argv[1]);
 908         else if(ret == EX_NOTFOUND)
 909             krb5_warnx(context, N_("command not found: %s", ""), argv[1]);
 910
 911         krb5_cc_destroy(context, ccache);
 912 #ifndef NO_AFS
 913         if(k_hasafs())
 914             k_unlog();
 915 #endif
 916     } else {
 917         krb5_cc_close (context, ccache);
 918         ret = 0;
 919     }
 920     krb5_free_principal(context, principal);
 921     krb5_free_context (context);
 922     return ret;
 923 }