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 char *fast_armor_cache_string = NULL;
  78 static int use_referrals_flag = 0;
  79 static int windows_flag = 0;
  80 #ifndef NO_NTLM
  81 static char *ntlm_domain;
  82 #endif
  83
  84
  85 static struct getargs args[] = {
  86     /*
  87      * used by MIT
  88      * a: ~A
  89      * V: verbose
  90      * F: ~f
  91      * P: ~p
  92      * C: v4 cache name?
  93      * 5:
  94      *
  95      * old flags
  96      * 4:
  97      * 9:
  98      */
  99     { "afslog",         0  , arg_flag, &do_afslog,
 100       NP_("obtain afs tokens", ""), NULL },
 101
 102     { "cache",          'c', arg_string, &cred_cache,
 103       NP_("credentials cache", ""), "cachename" },
 104
 105     { "forwardable",    'F', arg_negative_flag, &forwardable_flag,
 106       NP_("get tickets not forwardable", ""), NULL },
 107
 108     { NULL,             'f', arg_flag, &forwardable_flag,
 109       NP_("get forwardable tickets", ""), NULL },
 110
 111     { "keytab",         't', arg_string, &keytab_str,
 112       NP_("keytab to use", ""), "keytabname" },
 113
 114     { "lifetime",       'l', arg_string, &lifetime,
 115       NP_("lifetime of tickets", ""), "time" },
 116
 117     { "proxiable",      'p', arg_flag, &proxiable_flag,
 118       NP_("get proxiable tickets", ""), NULL },
 119
 120     { "renew",          'R', arg_flag, &renew_flag,
 121       NP_("renew TGT", ""), NULL },
 122
 123     { "renewable",      0,   arg_flag, &renewable_flag,
 124       NP_("get renewable tickets", ""), NULL },
 125
 126     { "renewable-life", 'r', arg_string, &renew_life,
 127       NP_("renewable lifetime of tickets", ""), "time" },
 128
 129     { "server",         'S', arg_string, &server_str,
 130       NP_("server to get ticket for", ""), "principal" },
 131
 132     { "start-time",     's', arg_string, &start_str,
 133       NP_("when ticket gets valid", ""), "time" },
 134
 135     { "use-keytab",     'k', arg_flag, &use_keytab,
 136       NP_("get key from keytab", ""), NULL },
 137
 138     { "validate",       'v', arg_flag, &validate_flag,
 139       NP_("validate TGT", ""), NULL },
 140
 141     { "enctypes",       'e', arg_strings, &etype_str,
 142       NP_("encryption types to use", ""), "enctypes" },
 143
 144     { "fcache-version", 0,   arg_integer, &fcache_version,
 145       NP_("file cache version to create", ""), NULL },
 146
 147     { "addresses",      'A',   arg_negative_flag,       &addrs_flag,
 148       NP_("request a ticket with no addresses", ""), NULL },
 149
 150     { "extra-addresses",'a', arg_strings,       &extra_addresses,
 151       NP_("include these extra addresses", ""), "addresses" },
 152
 153     { "anonymous",      0,   arg_flag,  &anonymous_flag,
 154       NP_("request an anonymous ticket", ""), NULL },
 155
 156     { "request-pac",    0,   arg_flag,  &pac_flag,
 157       NP_("request a Windows PAC", ""), NULL },
 158
 159     { "password-file",  0,   arg_string, &password_file,
 160       NP_("read the password from a file", ""), NULL },
 161
 162     { "canonicalize",0,   arg_flag, &canonicalize_flag,
 163       NP_("canonicalize client principal", ""), NULL },
 164
 165     { "enterprise",0,   arg_flag, &enterprise_flag,
 166       NP_("parse principal as a KRB5-NT-ENTERPRISE name", ""), NULL },
 167 #ifdef PKINIT
 168     { "pk-enterprise",  0,      arg_flag,       &pk_enterprise_flag,
 169       NP_("use enterprise name from certificate", ""), NULL },
 170
 171     { "pk-user",        'C',    arg_string,     &pk_user_id,
 172       NP_("principal's public/private/certificate identifier", ""), "id" },
 173
 174     { "x509-anchors",   'D',  arg_string, &pk_x509_anchors,
 175       NP_("directory with CA certificates", ""), "directory" },
 176
 177     { "pk-use-enckey",  0,  arg_flag, &pk_use_enckey,
 178       NP_("Use RSA encrypted reply (instead of DH)", ""), NULL },
 179 #endif
 180 #ifndef NO_NTLM
 181     { "ntlm-domain",    0,  arg_string, &ntlm_domain,
 182       NP_("NTLM domain", ""), "domain" },
 183 #endif
 184
 185     { "change-default",  0,  arg_negative_flag, &switch_cache_flags,
 186       NP_("switch the default cache to the new credentials cache", ""), NULL },
 187
 188     { "ok-as-delegate", 0,  arg_flag, &ok_as_delegate_flag,
 189       NP_("honor ok-as-delegate on tickets", ""), NULL },
 190
 191     { "fast-armor-cache",       0,  arg_string, &fast_armor_cache_string,
 192       NP_("use this credential cache as FAST armor cache", ""), "cache" },
 193
 194     { "use-referrals",  0,  arg_flag, &use_referrals_flag,
 195       NP_("only use referrals, no dns canalisation", ""), NULL },
 196
 197     { "windows",        0,  arg_flag, &windows_flag,
 198       NP_("get windows behavior", ""), NULL },
 199
 200     { "version",        0,   arg_flag, &version_flag, NULL, NULL },
 201     { "help",           0,   arg_flag, &help_flag, NULL, NULL }
 202 };
 203
 204 static void
 205 usage (int ret)
 206 {
 207     arg_printusage_i18n (args,
 208                          sizeof(args)/sizeof(*args),
 209                          N_("Usage: ", ""),
 210                          NULL,
 211                          "[principal [command]]",
 212                          getarg_i18n);
 213     exit (ret);
 214 }
 215
 216 static krb5_error_code
 217 get_server(krb5_context context,
 218            krb5_principal client,
 219            const char *server,
 220            krb5_principal *princ)
 221 {
 222     krb5_const_realm realm;
 223     if(server)
 224         return krb5_parse_name(context, server, princ);
 225
 226     realm = krb5_principal_get_realm(context, client);
 227     return krb5_make_principal(context, princ, realm,
 228                                KRB5_TGS_NAME, realm, NULL);
 229 }
 230
 231 static int
 232 renew_validate(krb5_context context,
 233                int renew,
 234                int validate,
 235                krb5_ccache cache,
 236                const char *server,
 237                krb5_deltat life)
 238 {
 239     krb5_error_code ret;
 240     krb5_creds in, *out = NULL;
 241     krb5_kdc_flags flags;
 242
 243     memset(&in, 0, sizeof(in));
 244
 245     ret = krb5_cc_get_principal(context, cache, &in.client);
 246     if(ret) {
 247         krb5_warn(context, ret, "krb5_cc_get_principal");
 248         return ret;
 249     }
 250     ret = get_server(context, in.client, server, &in.server);
 251     if(ret) {
 252         krb5_warn(context, ret, "get_server");
 253         goto out;
 254     }
 255
 256     if (renew) {
 257         /*
 258          * no need to check the error here, it's only to be
 259          * friendly to the user
 260          */
 261         krb5_get_credentials(context, KRB5_GC_CACHED, cache, &in, &out);
 262     }
 263
 264     flags.i = 0;
 265     flags.b.renewable         = flags.b.renew = renew;
 266     flags.b.validate          = validate;
 267
 268     if (forwardable_flag != -1)
 269         flags.b.forwardable       = forwardable_flag;
 270     else if (out)
 271         flags.b.forwardable       = out->flags.b.forwardable;
 272
 273     if (proxiable_flag != -1)
 274         flags.b.proxiable         = proxiable_flag;
 275     else if (out)
 276         flags.b.proxiable         = out->flags.b.proxiable;
 277
 278     if (anonymous_flag)
 279         flags.b.request_anonymous = anonymous_flag;
 280     if(life)
 281         in.times.endtime = time(NULL) + life;
 282
 283     if (out) {
 284         krb5_free_creds (context, out);
 285         out = NULL;
 286     }
 287
 288
 289     ret = krb5_get_kdc_cred(context,
 290                             cache,
 291                             flags,
 292                             NULL,
 293                             NULL,
 294                             &in,
 295                             &out);
 296     if(ret) {
 297         krb5_warn(context, ret, "krb5_get_kdc_cred");
 298         goto out;
 299     }
 300     ret = krb5_cc_initialize(context, cache, in.client);
 301     if(ret) {
 302         krb5_free_creds (context, out);
 303         krb5_warn(context, ret, "krb5_cc_initialize");
 304         goto out;
 305     }
 306     ret = krb5_cc_store_cred(context, cache, out);
 307
 308     if(ret == 0 && server == NULL) {
 309         /* only do this if it's a general renew-my-tgt request */
 310 #ifndef NO_AFS
 311         if(do_afslog && k_hasafs())
 312             krb5_afslog(context, cache, NULL, NULL);
 313 #endif
 314     }
 315
 316     krb5_free_creds (context, out);
 317     if(ret) {
 318         krb5_warn(context, ret, "krb5_cc_store_cred");
 319         goto out;
 320     }
 321 out:
 322     krb5_free_cred_contents(context, &in);
 323     return ret;
 324 }
 325
 326 #ifndef NO_NTLM
 327
 328 static krb5_error_code
 329 store_ntlmkey(krb5_context context, krb5_ccache id,
 330               const char *domain, struct ntlm_buf *buf)
 331 {
 332     krb5_error_code ret;
 333     krb5_data data;
 334     char *name;
 335     int aret;
 336
 337     aret = asprintf(&name, "ntlm-key-%s", domain);
 338     if (aret == -1 || name == NULL) {
 339         krb5_clear_error_message(context);
 340         return ENOMEM;
 341     }
 342
 343     data.length = buf->length;
 344     data.data = buf->data;
 345
 346     ret = krb5_cc_set_config(context, id, NULL, name, &data);
 347     free(name);
 348     return ret;
 349 }
 350 #endif
 351
 352 static krb5_error_code
 353 get_new_tickets(krb5_context context,
 354                 krb5_principal principal,
 355                 krb5_ccache ccache,
 356                 krb5_deltat ticket_life,
 357                 int interactive)
 358 {
 359     krb5_error_code ret;
 360     krb5_get_init_creds_opt *opt;
 361     krb5_creds cred;
 362     char passwd[256];
 363     krb5_deltat start_time = 0;
 364     krb5_deltat renew = 0;
 365     const char *renewstr = NULL;
 366     krb5_enctype *enctype = NULL;
 367     krb5_ccache tempccache;
 368     krb5_keytab kt = NULL;
 369     krb5_init_creds_context ctx;
 370 #ifndef NO_NTLM
 371     struct ntlm_buf ntlmkey;
 372     memset(&ntlmkey, 0, sizeof(ntlmkey));
 373 #endif
 374     passwd[0] = '\0';
 375
 376     if (password_file) {
 377         FILE *f;
 378
 379         if (strcasecmp("STDIN", password_file) == 0)
 380             f = stdin;
 381         else
 382             f = fopen(password_file, "r");
 383         if (f == NULL)
 384             krb5_errx(context, 1, "Failed to open the password file %s",
 385                       password_file);
 386
 387         if (fgets(passwd, sizeof(passwd), f) == NULL)
 388             krb5_errx(context, 1,
 389                       N_("Failed to read password from file %s", ""),
 390                       password_file);
 391         if (f != stdin)
 392             fclose(f);
 393         passwd[strcspn(passwd, "\n")] = '\0';
 394     }
 395
 396 #ifdef __APPLE__
 397     if (passwd[0] == '\0') {
 398         const char *realm;
 399         OSStatus osret;
 400         UInt32 length;
 401         void *buffer;
 402         char *name;
 403
 404         realm = krb5_principal_get_realm(context, principal);
 405
 406         ret = krb5_unparse_name_flags(context, principal,
 407                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &name);
 408         if (ret)
 409             goto nopassword;
 410
 411         osret = SecKeychainFindGenericPassword(NULL, strlen(realm), realm,
 412                                                strlen(name), name,
 413                                                &length, &buffer, NULL);
 414         free(name);
 415         if (osret == noErr && length < sizeof(passwd) - 1) {
 416             memcpy(passwd, buffer, length);
 417             passwd[length] = '\0';
 418         }
 419     nopassword:
 420         do { } while(0);
 421     }
 422 #endif
 423
 424     memset(&cred, 0, sizeof(cred));
 425
 426     ret = krb5_get_init_creds_opt_alloc (context, &opt);
 427     if (ret)
 428         krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc");
 429
 430     krb5_get_init_creds_opt_set_default_flags(context, "kinit",
 431         krb5_principal_get_realm(context, principal), opt);
 432
 433     if(forwardable_flag != -1)
 434         krb5_get_init_creds_opt_set_forwardable (opt, forwardable_flag);
 435     if(proxiable_flag != -1)
 436         krb5_get_init_creds_opt_set_proxiable (opt, proxiable_flag);
 437     if(anonymous_flag)
 438         krb5_get_init_creds_opt_set_anonymous (opt, anonymous_flag);
 439     if (pac_flag != -1)
 440         krb5_get_init_creds_opt_set_pac_request(context, opt,
 441                                                 pac_flag ? TRUE : FALSE);
 442     if (canonicalize_flag)
 443         krb5_get_init_creds_opt_set_canonicalize(context, opt, TRUE);
 444     if (pk_enterprise_flag || enterprise_flag || canonicalize_flag || windows_flag)
 445         krb5_get_init_creds_opt_set_win2k(context, opt, TRUE);
 446     if (pk_user_id || ent_user_id || anonymous_flag) {
 447         ret = krb5_get_init_creds_opt_set_pkinit(context, opt,
 448                                                  principal,
 449                                                  pk_user_id,
 450                                                  pk_x509_anchors,
 451                                                  NULL,
 452                                                  NULL,
 453                                                  pk_use_enckey ? 2 : 0 |
 454                                                  anonymous_flag ? 4 : 0,
 455                                                  krb5_prompter_posix,
 456                                                  NULL,
 457                                                  passwd);
 458         if (ret)
 459             krb5_err(context, 1, ret, "krb5_get_init_creds_opt_set_pkinit");
 460         if (ent_user_id)
 461             krb5_get_init_creds_opt_set_pkinit_user_certs(context, opt, ent_user_id);
 462     }
 463
 464     if (addrs_flag != -1)
 465         krb5_get_init_creds_opt_set_addressless(context, opt,
 466                                                 addrs_flag ? FALSE : TRUE);
 467
 468     if (renew_life == NULL && renewable_flag)
 469         renewstr = "1 month";
 470     if (renew_life)
 471         renewstr = renew_life;
 472     if (renewstr) {
 473         renew = parse_time (renewstr, "s");
 474         if (renew < 0)
 475             errx (1, "unparsable time: %s", renewstr);
 476
 477         krb5_get_init_creds_opt_set_renew_life (opt, renew);
 478     }
 479
 480     if(ticket_life != 0)
 481         krb5_get_init_creds_opt_set_tkt_life (opt, ticket_life);
 482
 483     if(start_str) {
 484         int tmp = parse_time (start_str, "s");
 485         if (tmp < 0)
 486             errx (1, N_("unparsable time: %s", ""), start_str);
 487
 488         start_time = tmp;
 489     }
 490
 491     if(etype_str.num_strings) {
 492         int i;
 493
 494         enctype = malloc(etype_str.num_strings * sizeof(*enctype));
 495         if(enctype == NULL)
 496             errx(1, "out of memory");
 497         for(i = 0; i < etype_str.num_strings; i++) {
 498             ret = krb5_string_to_enctype(context,
 499                                          etype_str.strings[i],
 500                                          &enctype[i]);
 501             if(ret)
 502                 errx(1, "unrecognized enctype: %s", etype_str.strings[i]);
 503         }
 504         krb5_get_init_creds_opt_set_etype_list(opt, enctype,
 505                                                etype_str.num_strings);
 506     }
 507
 508     ret = krb5_init_creds_init(context, principal, krb5_prompter_posix, NULL, start_time, opt, &ctx);
 509     if (ret)
 510         krb5_err(context, 1, ret, "krb5_init_creds_init");
 511
 512     if (server_str) {
 513         ret = krb5_init_creds_set_service(context, ctx, server_str);
 514         if (ret)
 515             krb5_err(context, 1, ret, "krb5_init_creds_set_service");
 516     }
 517
 518     if (fast_armor_cache_string) {
 519         krb5_ccache fastid;
 520
 521         ret = krb5_cc_resolve(context, fast_armor_cache_string, &fastid);
 522         if (ret)
 523             krb5_err(context, 1, ret, "krb5_cc_resolve(FAST cache)");
 524
 525         ret = krb5_init_creds_set_fast_ccache(context, ctx, fastid);
 526         if (ret)
 527             krb5_err(context, 1, ret, "krb5_init_creds_set_fast_ccache");
 528     }
 529
 530     if(use_keytab || keytab_str) {
 531
 532         if(keytab_str)
 533             ret = krb5_kt_resolve(context, keytab_str, &kt);
 534         else
 535             ret = krb5_kt_default(context, &kt);
 536         if (ret)
 537             krb5_err(context, 1, ret, "resolving keytab");
 538
 539         ret = krb5_init_creds_set_keytab(context, ctx, kt);
 540         if (ret)
 541             krb5_err(context, 1, ret, "krb5_init_creds_set_keytab");
 542
 543     } else if (pk_user_id || ent_user_id || anonymous_flag) {
 544
 545     } else if (!interactive) {
 546         static int already_warned = 0;
 547
 548         if (!already_warned)
 549             krb5_warnx(context, "Not interactive, failed to get "
 550               "initial ticket");
 551         krb5_get_init_creds_opt_free(context, opt);
 552         already_warned = 1;
 553         return 0;
 554     } else {
 555
 556         if (passwd[0] == '\0') {
 557             char *p, *prompt;
 558             int aret = 0;
 559
 560             ret = krb5_unparse_name (context, principal, &p);
 561             if (!ret) {
 562                 aret = asprintf (&prompt, N_("%s's Password: ", ""), p);
 563                 free (p);
 564             }
 565             if (ret || aret == -1)
 566                 errx(1, "failed to generate passwd prompt: not enough memory");
 567
 568             if (UI_UTIL_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){
 569                 memset(passwd, 0, sizeof(passwd));
 570                 errx(1, "failed to read password");
 571             }
 572             free (prompt);
 573         }
 574
 575         if (passwd[0]) {
 576             ret = krb5_init_creds_set_password(context, ctx, passwd);
 577             if (ret)
 578                 krb5_err(context, 1, ret, "krb5_init_creds_set_password");
 579         }
 580     }
 581
 582     ret = krb5_init_creds_get(context, ctx);
 583
 584 #ifndef NO_NTLM
 585     if (ntlm_domain && passwd[0])
 586         heim_ntlm_nt_key(passwd, &ntlmkey);
 587 #endif
 588     memset(passwd, 0, sizeof(passwd));
 589
 590     switch(ret){
 591     case 0:
 592         break;
 593     case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */
 594         exit(1);
 595     case KRB5KRB_AP_ERR_BAD_INTEGRITY:
 596     case KRB5KRB_AP_ERR_MODIFIED:
 597     case KRB5KDC_ERR_PREAUTH_FAILED:
 598     case KRB5_GET_IN_TKT_LOOP:
 599         krb5_errx(context, 1, N_("Password incorrect", ""));
 600         break;
 601     case KRB5KRB_AP_ERR_V4_REPLY:
 602         krb5_errx(context, 1, N_("Looks like a Kerberos 4 reply", ""));
 603         break;
 604     default:
 605         krb5_err(context, 1, ret, "krb5_get_init_creds");
 606     }
 607
 608     krb5_process_last_request(context, opt, ctx);
 609
 610     ret = krb5_init_creds_get_creds(context, ctx, &cred);
 611     if (ret)
 612             krb5_err(context, 1, ret, "krb5_init_creds_get_creds");
 613
 614     if(ticket_life != 0) {
 615         if(abs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) {
 616             char life[64];
 617             unparse_time_approx(cred.times.endtime - cred.times.starttime,
 618                                 life, sizeof(life));
 619             krb5_warnx(context, N_("NOTICE: ticket lifetime is %s", ""), life);
 620         }
 621     }
 622     if(renew_life) {
 623         if(abs(cred.times.renew_till - cred.times.starttime - renew) > 30) {
 624             char life[64];
 625             unparse_time_approx(cred.times.renew_till - cred.times.starttime,
 626                                 life, sizeof(life));
 627             krb5_warnx(context,
 628                        N_("NOTICE: ticket renewable lifetime is %s", ""),
 629                        life);
 630         }
 631     }
 632
 633     ret = krb5_cc_new_unique(context, krb5_cc_get_type(context, ccache),
 634                              NULL, &tempccache);
 635     if (ret)
 636         krb5_err (context, 1, ret, "krb5_cc_new_unique");
 637
 638     ret = krb5_init_creds_store(context, ctx, tempccache);
 639     if (ret)
 640         krb5_err(context, 1, ret, "krb5_init_creds_store");
 641
 642     krb5_init_creds_free(context, ctx);
 643
 644     ret = krb5_cc_move(context, tempccache, ccache);
 645     if (ret)
 646         krb5_err (context, 1, ret, "krb5_cc_move");
 647
 648     if (switch_cache_flags)
 649         krb5_cc_switch(context, ccache);
 650
 651 #ifndef NO_NTLM
 652     if (ntlm_domain && ntlmkey.data)
 653         store_ntlmkey(context, ccache, ntlm_domain, &ntlmkey);
 654 #endif
 655
 656     if (ok_as_delegate_flag || windows_flag || use_referrals_flag) {
 657         unsigned char d = 0;
 658         krb5_data data;
 659
 660         if (ok_as_delegate_flag || windows_flag)
 661             d |= 1;
 662         if (use_referrals_flag || windows_flag)
 663             d |= 2;
 664
 665         data.length = 1;
 666         data.data = &d;
 667
 668         krb5_cc_set_config(context, ccache, NULL, "realm-config", &data);
 669     }
 670
 671     krb5_get_init_creds_opt_free(context, opt);
 672
 673     if (kt)
 674         krb5_kt_close(context, kt);
 675     if (enctype)
 676         free(enctype);
 677
 678     return 0;
 679 }
 680
 681 static time_t
 682 ticket_lifetime(krb5_context context, krb5_ccache cache, krb5_principal client,
 683                 const char *server, time_t *renew)
 684 {
 685     krb5_creds in_cred, *cred;
 686     krb5_error_code ret;
 687     time_t timeout;
 688     time_t curtime;
 689
 690     memset(&in_cred, 0, sizeof(in_cred));
 691
 692     ret = krb5_cc_get_principal(context, cache, &in_cred.client);
 693     if(ret) {
 694         krb5_warn(context, ret, "krb5_cc_get_principal");
 695         return 0;
 696     }
 697     ret = get_server(context, in_cred.client, server, &in_cred.server);
 698     if(ret) {
 699         krb5_free_principal(context, in_cred.client);
 700         krb5_warn(context, ret, "get_server");
 701         return 0;
 702     }
 703
 704     ret = krb5_get_credentials(context, KRB5_GC_CACHED,
 705                                cache, &in_cred, &cred);
 706     krb5_free_principal(context, in_cred.client);
 707     krb5_free_principal(context, in_cred.server);
 708     if(ret) {
 709         krb5_warn(context, ret, "krb5_get_credentials");
 710         return 0;
 711     }
 712     curtime = time(NULL);
 713     timeout = cred->times.endtime - curtime;
 714     if (timeout < 0)
 715         timeout = 0;
 716     if (renew) {
 717         *renew = cred->times.renew_till - curtime;
 718         if (*renew < 0)
 719             *renew = 0;
 720     }
 721     krb5_free_creds(context, cred);
 722     return timeout;
 723 }
 724
 725 struct renew_ctx {
 726     krb5_context context;
 727     krb5_ccache  ccache;
 728     krb5_principal principal;
 729     krb5_deltat ticket_life;
 730 };
 731
 732 static time_t
 733 renew_func(void *ptr)
 734 {
 735     struct renew_ctx *ctx = ptr;
 736     time_t expire;
 737     time_t renew_expire;
 738     static time_t exp_delay = 1;
 739
 740     expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal,
 741                              server_str, &renew_expire);
 742
 743     if (renew_expire > expire) {
 744         renew_validate(ctx->context, 1, validate_flag, ctx->ccache,
 745                        server_str, ctx->ticket_life);
 746         expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal,
 747                                  server_str, &renew_expire);
 748     }
 749
 750     if (expire < ctx->ticket_life / 2) {
 751         get_new_tickets(ctx->context, ctx->principal,
 752                         ctx->ccache, ctx->ticket_life, 0);
 753         expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal,
 754                                  server_str, &renew_expire);
 755     }
 756
 757 #ifndef NO_AFS
 758     if(do_afslog && k_hasafs())
 759         krb5_afslog(ctx->context, ctx->ccache, NULL, NULL);
 760 #endif
 761
 762     /*
 763      * If our tickets have expired and we been able to either renew them
 764      * or obtain new tickets, then we still call this function but we use
 765      * an exponential backoff.  This should take care of the case where
 766      * we are using stored credentials but the KDC has been unavailable
 767      * for some reason...
 768      */
 769
 770     if (expire < 1) {
 771         if (exp_delay < 7200)
 772             exp_delay *= 2;
 773         return exp_delay;
 774     }
 775     exp_delay = 1;
 776
 777     return expire / 2 + 1;
 778 }
 779
 780 int
 781 main (int argc, char **argv)
 782 {
 783     krb5_error_code ret;
 784     krb5_context context;
 785     krb5_ccache  ccache;
 786     krb5_principal principal;
 787     int optidx = 0;
 788     krb5_deltat ticket_life = 0;
 789     int parseflags = 0;
 790
 791     setprogname (argv[0]);
 792
 793     setlocale (LC_ALL, "");
 794     bindtextdomain ("heimdal_kuser", HEIMDAL_LOCALEDIR);
 795     textdomain("heimdal_kuser");
 796
 797     ret = krb5_init_context (&context);
 798     if (ret == KRB5_CONFIG_BADFORMAT)
 799         errx (1, "krb5_init_context failed to parse configuration file");
 800     else if (ret)
 801         errx(1, "krb5_init_context failed: %d", ret);
 802
 803     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 804         usage(1);
 805
 806     if (help_flag)
 807         usage (0);
 808
 809     if(version_flag) {
 810         print_version(NULL);
 811         exit(0);
 812     }
 813
 814     argc -= optidx;
 815     argv += optidx;
 816
 817     if (canonicalize_flag || enterprise_flag)
 818         parseflags |= KRB5_PRINCIPAL_PARSE_ENTERPRISE;
 819
 820     if (pk_enterprise_flag) {
 821         ret = krb5_pk_enterprise_cert(context, pk_user_id,
 822                                       argv[0], &principal,
 823                                       &ent_user_id);
 824         if (ret)
 825             krb5_err(context, 1, ret, "krb5_pk_enterprise_certs");
 826
 827         pk_user_id = NULL;
 828
 829     } else if (anonymous_flag) {
 830
 831         ret = krb5_make_principal(context, &principal, argv[0],
 832                                   KRB5_WELLKNOWN_NAME, KRB5_ANON_NAME,
 833                                   NULL);
 834         if (ret)
 835             krb5_err(context, 1, ret, "krb5_make_principal");
 836         krb5_principal_set_type(context, principal, KRB5_NT_WELLKNOWN);
 837
 838     } else {
 839         if (argv[0]) {
 840             ret = krb5_parse_name_flags (context, argv[0], parseflags,
 841                                          &principal);
 842             if (ret)
 843                 krb5_err (context, 1, ret, "krb5_parse_name");
 844         } else {
 845             ret = krb5_get_default_principal (context, &principal);
 846             if (ret)
 847                 krb5_err (context, 1, ret, "krb5_get_default_principal");
 848         }
 849     }
 850
 851     if(fcache_version)
 852         krb5_set_fcache_version(context, fcache_version);
 853
 854     if(renewable_flag == -1)
 855         /* this seems somewhat pointless, but whatever */
 856         krb5_appdefault_boolean(context, "kinit",
 857                                 krb5_principal_get_realm(context, principal),
 858                                 "renewable", FALSE, &renewable_flag);
 859     if(do_afslog == -1)
 860         krb5_appdefault_boolean(context, "kinit",
 861                                 krb5_principal_get_realm(context, principal),
 862                                 "afslog", TRUE, &do_afslog);
 863
 864     if(cred_cache)
 865         ret = krb5_cc_resolve(context, cred_cache, &ccache);
 866     else {
 867         if(argc > 1) {
 868             char s[1024];
 869             ret = krb5_cc_new_unique(context, NULL, NULL, &ccache);
 870             if(ret)
 871                 krb5_err(context, 1, ret, "creating cred cache");
 872             snprintf(s, sizeof(s), "%s:%s",
 873                      krb5_cc_get_type(context, ccache),
 874                      krb5_cc_get_name(context, ccache));
 875             setenv("KRB5CCNAME", s, 1);
 876         } else {
 877             ret = krb5_cc_cache_match(context, principal, &ccache);
 878             if (ret) {
 879                 const char *type;
 880                 ret = krb5_cc_default (context, &ccache);
 881                 if (ret)
 882                     krb5_err (context, 1, ret, N_("resolving credentials cache", ""));
 883
 884                 /*
 885                  * Check if the type support switching, and we do,
 886                  * then do that instead over overwriting the current
 887                  * default credential
 888                  */
 889                 type = krb5_cc_get_type(context, ccache);
 890                 if (krb5_cc_support_switch(context, type)) {
 891                     krb5_cc_close(context, ccache);
 892                     ret = krb5_cc_new_unique(context, type, NULL, &ccache);
 893                 }
 894             }
 895         }
 896     }
 897     if (ret)
 898         krb5_err (context, 1, ret, N_("resolving credentials cache", ""));
 899
 900 #ifndef NO_AFS
 901     if(argc > 1 && k_hasafs ())
 902         k_setpag();
 903 #endif
 904
 905     if (lifetime) {
 906         int tmp = parse_time (lifetime, "s");
 907         if (tmp < 0)
 908             errx (1, N_("unparsable time: %s", ""), lifetime);
 909
 910         ticket_life = tmp;
 911     }
 912
 913     if(addrs_flag == 0 && extra_addresses.num_strings > 0)
 914         krb5_errx(context, 1,
 915                   N_("specifying both extra addresses and "
 916                      "no addresses makes no sense", ""));
 917     {
 918         int i;
 919         krb5_addresses addresses;
 920         memset(&addresses, 0, sizeof(addresses));
 921         for(i = 0; i < extra_addresses.num_strings; i++) {
 922             ret = krb5_parse_address(context, extra_addresses.strings[i],
 923                                      &addresses);
 924             if (ret == 0) {
 925                 krb5_add_extra_addresses(context, &addresses);
 926                 krb5_free_addresses(context, &addresses);
 927             }
 928         }
 929         free_getarg_strings(&extra_addresses);
 930     }
 931
 932     if(renew_flag || validate_flag) {
 933         ret = renew_validate(context, renew_flag, validate_flag,
 934                              ccache, server_str, ticket_life);
 935         exit(ret != 0);
 936     }
 937
 938     get_new_tickets(context, principal, ccache, ticket_life, 1);
 939
 940 #ifndef NO_AFS
 941     if(do_afslog && k_hasafs())
 942         krb5_afslog(context, ccache, NULL, NULL);
 943 #endif
 944     if(argc > 1) {
 945         struct renew_ctx ctx;
 946         time_t timeout;
 947
 948         timeout = ticket_lifetime(context, ccache, principal,
 949                                   server_str, NULL) / 2;
 950
 951         ctx.context = context;
 952         ctx.ccache = ccache;
 953         ctx.principal = principal;
 954         ctx.ticket_life = ticket_life;
 955
 956         ret = simple_execvp_timed(argv[1], argv+1,
 957                                   renew_func, &ctx, timeout);
 958 #define EX_NOEXEC       126
 959 #define EX_NOTFOUND     127
 960         if(ret == EX_NOEXEC)
 961             krb5_warnx(context, N_("permission denied: %s", ""), argv[1]);
 962         else if(ret == EX_NOTFOUND)
 963             krb5_warnx(context, N_("command not found: %s", ""), argv[1]);
 964
 965         krb5_cc_destroy(context, ccache);
 966 #ifndef NO_AFS
 967         if(k_hasafs())
 968             k_unlog();
 969 #endif
 970     } else {
 971         krb5_cc_close (context, ccache);
 972         ret = 0;
 973     }
 974     krb5_free_principal(context, principal);
 975     krb5_free_context (context);
 976     return ret;
 977 }