source3/libsmb/clikrb5.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    simple kerberos5 routines for active directory
   4    Copyright (C) Andrew Tridgell 2001
   5    Copyright (C) Luke Howard 2002-2003
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   7    Copyright (C) Guenther Deschner 2005
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #define KRB5_PRIVATE    1       /* this file uses PRIVATE interfaces! */
  25 #define KRB5_DEPRECATED 1       /* this file uses DEPRECATED interfaces! */
  26
  27 #include "includes.h"
  28
  29 #ifdef HAVE_KRB5
  30
  31 #ifdef HAVE_KRB5_KEYBLOCK_KEYVALUE
  32 #define KRB5_KEY_TYPE(k)        ((k)->keytype)
  33 #define KRB5_KEY_LENGTH(k)      ((k)->keyvalue.length)
  34 #define KRB5_KEY_DATA(k)        ((k)->keyvalue.data)
  35 #else
  36 #define KRB5_KEY_TYPE(k)        ((k)->enctype)
  37 #define KRB5_KEY_LENGTH(k)      ((k)->length)
  38 #define KRB5_KEY_DATA(k)        ((k)->contents)
  39 #endif /* HAVE_KRB5_KEYBLOCK_KEYVALUE */
  40
  41 /**************************************************************
  42  Wrappers around kerberos string functions that convert from
  43  utf8 -> unix charset and vica versa.
  44 **************************************************************/
  45
  46 /**************************************************************
  47  krb5_parse_name that takes a UNIX charset.
  48 **************************************************************/
  49
  50  krb5_error_code smb_krb5_parse_name(krb5_context context,
  51                                 const char *name, /* in unix charset */
  52                                 krb5_principal *principal)
  53 {
  54         krb5_error_code ret;
  55         char *utf8_name;
  56
  57         if (push_utf8_allocate(&utf8_name, name) == (size_t)-1) {
  58                 return ENOMEM;
  59         }
  60
  61         ret = krb5_parse_name(context, utf8_name, principal);
  62         SAFE_FREE(utf8_name);
  63         return ret;
  64 }
  65
  66 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
  67 /**************************************************************
  68  krb5_parse_name_norealm that takes a UNIX charset.
  69 **************************************************************/
  70
  71 static krb5_error_code smb_krb5_parse_name_norealm_conv(krb5_context context,
  72                                 const char *name, /* in unix charset */
  73                                 krb5_principal *principal)
  74 {
  75         krb5_error_code ret;
  76         char *utf8_name;
  77
  78         *principal = NULL;
  79         if (push_utf8_allocate(&utf8_name, name) == (size_t)-1) {
  80                 return ENOMEM;
  81         }
  82
  83         ret = krb5_parse_name_norealm(context, utf8_name, principal);
  84         SAFE_FREE(utf8_name);
  85         return ret;
  86 }
  87 #endif
  88
  89 /**************************************************************
  90  krb5_parse_name that returns a UNIX charset name. Must
  91  be freed with normal free() call.
  92 **************************************************************/
  93
  94  krb5_error_code smb_krb5_unparse_name(krb5_context context,
  95                                         krb5_const_principal principal,
  96                                         char **unix_name)
  97 {
  98         krb5_error_code ret;
  99         char *utf8_name;
 100
 101         *unix_name = NULL;
 102         ret = krb5_unparse_name(context, principal, &utf8_name);
 103         if (ret) {
 104                 return ret;
 105         }
 106
 107         if (pull_utf8_allocate(unix_name, utf8_name)==-1) {
 108                 krb5_free_unparsed_name(context, utf8_name);
 109                 return ENOMEM;
 110         }
 111         krb5_free_unparsed_name(context, utf8_name);
 112         return 0;
 113 }
 114
 115 #ifndef HAVE_KRB5_SET_REAL_TIME
 116 /*
 117  * This function is not in the Heimdal mainline.
 118  */
 119  krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
 120 {
 121         krb5_error_code ret;
 122         int32_t sec, usec;
 123
 124         ret = krb5_us_timeofday(context, &sec, &usec);
 125         if (ret)
 126                 return ret;
 127
 128         context->kdc_sec_offset = seconds - sec;
 129         context->kdc_usec_offset = microseconds - usec;
 130
 131         return 0;
 132 }
 133 #endif
 134
 135 #if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
 136
 137 #if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
 138
 139 /* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
 140  * to krb5_set_default_tgs_ktypes. See
 141  *         http://lists.samba.org/archive/samba-technical/2006-July/048271.html
 142  *
 143  * If the MIT libraries are not exporting internal symbols, we will end up in
 144  * this branch, which is correct. Otherwise we will continue to use the
 145  * internal symbol
 146  */
 147  krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
 148 {
 149     return krb5_set_default_tgs_enctypes(ctx, enc);
 150 }
 151
 152 #elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
 153
 154 /* Heimdal */
 155  krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
 156 {
 157         return krb5_set_default_in_tkt_etypes(ctx, enc);
 158 }
 159
 160 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
 161
 162 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
 163
 164 #if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
 165 /* HEIMDAL */
 166  void setup_kaddr( krb5_address *pkaddr, struct sockaddr *paddr)
 167 {
 168         pkaddr->addr_type = KRB5_ADDRESS_INET;
 169         pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
 170         pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
 171 }
 172 #elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
 173 /* MIT */
 174  void setup_kaddr( krb5_address *pkaddr, struct sockaddr *paddr)
 175 {
 176         pkaddr->addrtype = ADDRTYPE_INET;
 177         pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
 178         pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
 179 }
 180 #else
 181 #error UNKNOWN_ADDRTYPE
 182 #endif
 183
 184 #if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
 185  int create_kerberos_key_from_string_direct(krb5_context context,
 186                                         krb5_principal host_princ,
 187                                         krb5_data *password,
 188                                         krb5_keyblock *key,
 189                                         krb5_enctype enctype)
 190 {
 191         int ret;
 192         krb5_data salt;
 193         krb5_encrypt_block eblock;
 194
 195         ret = krb5_principal2salt(context, host_princ, &salt);
 196         if (ret) {
 197                 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
 198                 return ret;
 199         }
 200         krb5_use_enctype(context, &eblock, enctype);
 201         ret = krb5_string_to_key(context, &eblock, key, password, &salt);
 202         SAFE_FREE(salt.data);
 203         return ret;
 204 }
 205 #elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
 206  int create_kerberos_key_from_string_direct(krb5_context context,
 207                                         krb5_principal host_princ,
 208                                         krb5_data *password,
 209                                         krb5_keyblock *key,
 210                                         krb5_enctype enctype)
 211 {
 212         int ret;
 213         krb5_salt salt;
 214
 215         ret = krb5_get_pw_salt(context, host_princ, &salt);
 216         if (ret) {
 217                 DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
 218                 return ret;
 219         }
 220
 221         ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
 222         krb5_free_salt(context, salt);
 223         return ret;
 224 }
 225 #else
 226 #error UNKNOWN_CREATE_KEY_FUNCTIONS
 227 #endif
 228
 229  int create_kerberos_key_from_string(krb5_context context,
 230                                         krb5_principal host_princ,
 231                                         krb5_data *password,
 232                                         krb5_keyblock *key,
 233                                         krb5_enctype enctype)
 234 {
 235         krb5_principal salt_princ = NULL;
 236         int ret;
 237         /*
 238          * Check if we've determined that the KDC is salting keys for this
 239          * principal/enctype in a non-obvious way.  If it is, try to match
 240          * its behavior.
 241          */
 242         salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
 243         ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
 244         if (salt_princ) {
 245                 krb5_free_principal(context, salt_princ);
 246         }
 247         return ret;
 248 }
 249
 250 #if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
 251  krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
 252                                             krb5_enctype **enctypes)
 253 {
 254         return krb5_get_permitted_enctypes(context, enctypes);
 255 }
 256 #elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
 257  krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
 258                                             krb5_enctype **enctypes)
 259 {
 260         return krb5_get_default_in_tkt_etypes(context, enctypes);
 261 }
 262 #else
 263 #error UNKNOWN_GET_ENCTYPES_FUNCTIONS
 264 #endif
 265
 266 #if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
 267  krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
 268                                         krb5_auth_context auth_context,
 269                                         krb5_keyblock *keyblock)
 270 {
 271         return krb5_auth_con_setkey(context, auth_context, keyblock);
 272 }
 273 #endif
 274
 275 BOOL unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
 276 {
 277         DATA_BLOB pac_contents;
 278         ASN1_DATA data;
 279         int data_type;
 280
 281         if (!auth_data->length) {
 282                 return False;
 283         }
 284
 285         asn1_load(&data, *auth_data);
 286         asn1_start_tag(&data, ASN1_SEQUENCE(0));
 287         asn1_start_tag(&data, ASN1_SEQUENCE(0));
 288         asn1_start_tag(&data, ASN1_CONTEXT(0));
 289         asn1_read_Integer(&data, &data_type);
 290
 291         if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
 292                 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
 293                 asn1_free(&data);
 294                 return False;
 295         }
 296
 297         asn1_end_tag(&data);
 298         asn1_start_tag(&data, ASN1_CONTEXT(1));
 299         asn1_read_OctetString(&data, &pac_contents);
 300         asn1_end_tag(&data);
 301         asn1_end_tag(&data);
 302         asn1_end_tag(&data);
 303         asn1_free(&data);
 304
 305         *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
 306
 307         data_blob_free(&pac_contents);
 308
 309         return True;
 310 }
 311
 312  BOOL get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
 313 {
 314         DATA_BLOB auth_data_wrapped;
 315         BOOL got_auth_data_pac = False;
 316         int i;
 317
 318 #if defined(HAVE_KRB5_TKT_ENC_PART2)
 319         if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
 320             tkt->enc_part2->authorization_data[0] &&
 321             tkt->enc_part2->authorization_data[0]->length)
 322         {
 323                 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
 324
 325                         if (tkt->enc_part2->authorization_data[i]->ad_type !=
 326                             KRB5_AUTHDATA_IF_RELEVANT) {
 327                                 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
 328                                         tkt->enc_part2->authorization_data[i]->ad_type));
 329                                 continue;
 330                         }
 331
 332                         auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
 333                                                       tkt->enc_part2->authorization_data[i]->length);
 334
 335                         /* check if it is a PAC */
 336                         got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
 337                         data_blob_free(&auth_data_wrapped);
 338
 339                         if (!got_auth_data_pac) {
 340                                 continue;
 341                         }
 342                 }
 343
 344                 return got_auth_data_pac;
 345         }
 346
 347 #else
 348         if (tkt->ticket.authorization_data &&
 349             tkt->ticket.authorization_data->len)
 350         {
 351                 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
 352
 353                         if (tkt->ticket.authorization_data->val[i].ad_type !=
 354                             KRB5_AUTHDATA_IF_RELEVANT) {
 355                                 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
 356                                         tkt->ticket.authorization_data->val[i].ad_type));
 357                                 continue;
 358                         }
 359
 360                         auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
 361                                                       tkt->ticket.authorization_data->val[i].ad_data.length);
 362
 363                         /* check if it is a PAC */
 364                         got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
 365                         data_blob_free(&auth_data_wrapped);
 366
 367                         if (!got_auth_data_pac) {
 368                                 continue;
 369                         }
 370                 }
 371
 372                 return got_auth_data_pac;
 373         }
 374 #endif
 375         return False;
 376 }
 377
 378  krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
 379 {
 380 #if defined(HAVE_KRB5_TKT_ENC_PART2)
 381         return tkt->enc_part2->client;
 382 #else
 383         return tkt->client;
 384 #endif
 385 }
 386
 387 #if !defined(HAVE_KRB5_LOCATE_KDC)
 388
 389 /* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
 390  * to a public interface for this functionality, so we have to be able to live
 391  * without it if the MIT libraries are hiding their internal symbols.
 392  */
 393
 394 #if defined(KRB5_KRBHST_INIT)
 395 /* Heimdal */
 396  krb5_error_code krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
 397 {
 398         krb5_krbhst_handle hnd;
 399         krb5_krbhst_info *hinfo;
 400         krb5_error_code rc;
 401         int num_kdcs, i;
 402         struct sockaddr *sa;
 403         struct addrinfo *ai;
 404
 405         *addr_pp = NULL;
 406         *naddrs = 0;
 407
 408         rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
 409         if (rc) {
 410                 DEBUG(0, ("krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
 411                 return rc;
 412         }
 413
 414         for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
 415                 ;
 416
 417         krb5_krbhst_reset(ctx, hnd);
 418
 419         if (!num_kdcs) {
 420                 DEBUG(0, ("krb5_locate_kdc: zero kdcs found !\n"));
 421                 krb5_krbhst_free(ctx, hnd);
 422                 return -1;
 423         }
 424
 425         sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
 426         if (!sa) {
 427                 DEBUG(0, ("krb5_locate_kdc: malloc failed\n"));
 428                 krb5_krbhst_free(ctx, hnd);
 429                 naddrs = 0;
 430                 return -1;
 431         }
 432
 433         memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
 434
 435         for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
 436
 437 #if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
 438                 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
 439                 if (rc) {
 440                         DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
 441                         continue;
 442                 }
 443 #endif
 444                 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
 445                         memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
 446         }
 447
 448         krb5_krbhst_free(ctx, hnd);
 449
 450         *naddrs = num_kdcs;
 451         *addr_pp = sa;
 452         return 0;
 453 }
 454
 455 #else /* ! defined(KRB5_KRBHST_INIT) */
 456
 457  krb5_error_code krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
 458                 struct sockaddr **addr_pp, int *naddrs, int get_masters)
 459 {
 460         DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
 461         return KRB5_KDC_UNREACH;
 462 }
 463
 464 #endif /* KRB5_KRBHST_INIT */
 465
 466 #endif /* HAVE_KRB5_LOCATE_KDC */
 467
 468 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
 469  void krb5_free_unparsed_name(krb5_context context, char *val)
 470 {
 471         SAFE_FREE(val);
 472 }
 473 #endif
 474
 475  void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
 476 {
 477 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
 478         if (pdata->data) {
 479                 krb5_free_data_contents(context, pdata);
 480         }
 481 #else
 482         SAFE_FREE(pdata->data);
 483 #endif
 484 }
 485
 486  void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
 487 {
 488 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
 489         KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
 490 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
 491         KRB5_KEY_TYPE((&pcreds->session)) = enctype;
 492 #else
 493 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
 494 #endif
 495 }
 496
 497  BOOL kerberos_compatible_enctypes(krb5_context context,
 498                                   krb5_enctype enctype1,
 499                                   krb5_enctype enctype2)
 500 {
 501 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
 502         krb5_boolean similar = 0;
 503
 504         krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
 505         return similar ? True : False;
 506 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
 507         return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
 508 #endif
 509 }
 510
 511 static BOOL ads_cleanup_expired_creds(krb5_context context,
 512                                       krb5_ccache  ccache,
 513                                       krb5_creds  *credsp)
 514 {
 515         krb5_error_code retval;
 516         const char *cc_type = krb5_cc_get_type(context, ccache);
 517
 518         DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
 519                   cc_type, krb5_cc_get_name(context, ccache),
 520                   http_timestring(credsp->times.endtime)));
 521
 522         /* we will probably need new tickets if the current ones
 523            will expire within 10 seconds.
 524         */
 525         if (credsp->times.endtime >= (time(NULL) + 10))
 526                 return False;
 527
 528         /* heimdal won't remove creds from a file ccache, and
 529            perhaps we shouldn't anyway, since internally we
 530            use memory ccaches, and a FILE one probably means that
 531            we're using creds obtained outside of our exectuable
 532         */
 533         if (strequal(cc_type, "FILE")) {
 534                 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
 535                 return False;
 536         }
 537
 538         retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
 539         if (retval) {
 540                 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
 541                           error_message(retval)));
 542                 /* If we have an error in this, we want to display it,
 543                    but continue as though we deleted it */
 544         }
 545         return True;
 546 }
 547
 548 /*
 549   we can't use krb5_mk_req because w2k wants the service to be in a particular format
 550 */
 551 static krb5_error_code ads_krb5_mk_req(krb5_context context,
 552                                        krb5_auth_context *auth_context,
 553                                        const krb5_flags ap_req_options,
 554                                        const char *principal,
 555                                        krb5_ccache ccache,
 556                                        krb5_data *outbuf,
 557                                        time_t *expire_time)
 558 {
 559         krb5_error_code           retval;
 560         krb5_principal    server;
 561         krb5_creds              * credsp;
 562         krb5_creds                creds;
 563         krb5_data in_data;
 564         BOOL creds_ready = False;
 565         int i = 0, maxtries = 3;
 566
 567         retval = smb_krb5_parse_name(context, principal, &server);
 568         if (retval) {
 569                 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
 570                 return retval;
 571         }
 572
 573         /* obtain ticket & session key */
 574         ZERO_STRUCT(creds);
 575         if ((retval = krb5_copy_principal(context, server, &creds.server))) {
 576                 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
 577                          error_message(retval)));
 578                 goto cleanup_princ;
 579         }
 580
 581         if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
 582                 /* This can commonly fail on smbd startup with no ticket in the cache.
 583                  * Report at higher level than 1. */
 584                 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
 585                          error_message(retval)));
 586                 goto cleanup_creds;
 587         }
 588
 589         while (!creds_ready && (i < maxtries)) {
 590
 591                 if ((retval = krb5_get_credentials(context, 0, ccache,
 592                                                    &creds, &credsp))) {
 593                         DEBUG(1,("ads_krb5_mk_req: krb5_get_credentials failed for %s (%s)\n",
 594                                  principal, error_message(retval)));
 595                         goto cleanup_creds;
 596                 }
 597
 598                 /* cope with ticket being in the future due to clock skew */
 599                 if ((unsigned)credsp->times.starttime > time(NULL)) {
 600                         time_t t = time(NULL);
 601                         int time_offset =(int)((unsigned)credsp->times.starttime-t);
 602                         DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
 603                         krb5_set_real_time(context, t + time_offset + 1, 0);
 604                 }
 605
 606                 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
 607                         creds_ready = True;
 608                 }
 609
 610                 i++;
 611         }
 612
 613         DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
 614                   principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
 615                   http_timestring((unsigned)credsp->times.endtime),
 616                   (unsigned)credsp->times.endtime));
 617
 618         if (expire_time) {
 619                 *expire_time = (time_t)credsp->times.endtime;
 620         }
 621
 622         in_data.length = 0;
 623         retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
 624                                       &in_data, credsp, outbuf);
 625         if (retval) {
 626                 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
 627                          error_message(retval)));
 628         }
 629
 630         krb5_free_creds(context, credsp);
 631
 632 cleanup_creds:
 633         krb5_free_cred_contents(context, &creds);
 634
 635 cleanup_princ:
 636         krb5_free_principal(context, server);
 637
 638         return retval;
 639 }
 640
 641 /*
 642   get a kerberos5 ticket for the given service
 643 */
 644 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
 645                         DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
 646                         uint32 extra_ap_opts, const char *ccname,
 647                         time_t *tgs_expire)
 648
 649 {
 650         krb5_error_code retval;
 651         krb5_data packet;
 652         krb5_context context = NULL;
 653         krb5_ccache ccdef = NULL;
 654         krb5_auth_context auth_context = NULL;
 655         krb5_enctype enc_types[] = {
 656 #ifdef ENCTYPE_ARCFOUR_HMAC
 657                 ENCTYPE_ARCFOUR_HMAC,
 658 #endif
 659                 ENCTYPE_DES_CBC_MD5,
 660                 ENCTYPE_DES_CBC_CRC,
 661                 ENCTYPE_NULL};
 662
 663         initialize_krb5_error_table();
 664         retval = krb5_init_context(&context);
 665         if (retval) {
 666                 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
 667                          error_message(retval)));
 668                 goto failed;
 669         }
 670
 671         if (time_offset != 0) {
 672                 krb5_set_real_time(context, time(NULL) + time_offset, 0);
 673         }
 674
 675         if ((retval = krb5_cc_resolve(context, ccname ?
 676                         ccname : krb5_cc_default_name(context), &ccdef))) {
 677                 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
 678                          error_message(retval)));
 679                 goto failed;
 680         }
 681
 682         if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
 683                 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
 684                          error_message(retval)));
 685                 goto failed;
 686         }
 687
 688         if ((retval = ads_krb5_mk_req(context,
 689                                         &auth_context,
 690                                         AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
 691                                         principal,
 692                                         ccdef, &packet,
 693                                         tgs_expire))) {
 694                 goto failed;
 695         }
 696
 697         get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
 698
 699         *ticket = data_blob(packet.data, packet.length);
 700
 701         kerberos_free_data_contents(context, &packet);
 702
 703 failed:
 704
 705         if ( context ) {
 706                 if (ccdef)
 707                         krb5_cc_close(context, ccdef);
 708                 if (auth_context)
 709                         krb5_auth_con_free(context, auth_context);
 710                 krb5_free_context(context);
 711         }
 712
 713         return retval;
 714 }
 715
 716  BOOL get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, BOOL remote)
 717  {
 718         krb5_keyblock *skey;
 719         krb5_error_code err;
 720         BOOL ret = False;
 721
 722         if (remote)
 723                 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
 724         else
 725                 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
 726         if (err == 0 && skey != NULL) {
 727                 DEBUG(10, ("Got KRB5 session key of length %d\n",  (int)KRB5_KEY_LENGTH(skey)));
 728                 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
 729                 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
 730
 731                 ret = True;
 732
 733                 krb5_free_keyblock(context, skey);
 734         } else {
 735                 DEBUG(10, ("KRB5 error getting session key %d\n", err));
 736         }
 737
 738         return ret;
 739  }
 740
 741
 742 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
 743  const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
 744
 745  const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
 746 {
 747         static krb5_data kdata;
 748
 749         kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
 750         kdata.length = strlen((const char *)kdata.data);
 751         return &kdata;
 752 }
 753 #endif
 754
 755  krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
 756 {
 757 #if defined(HAVE_KRB5_KT_FREE_ENTRY)
 758         return krb5_kt_free_entry(context, kt_entry);
 759 #elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
 760         return krb5_free_keytab_entry_contents(context, kt_entry);
 761 #else
 762 #error UNKNOWN_KT_FREE_FUNCTION
 763 #endif
 764 }
 765
 766  void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
 767                                     PAC_SIGNATURE_DATA *sig)
 768 {
 769 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
 770         cksum->cksumtype        = (krb5_cksumtype)sig->type;
 771         cksum->checksum.length  = sig->signature.buf_len;
 772         cksum->checksum.data    = sig->signature.buffer;
 773 #else
 774         cksum->checksum_type    = (krb5_cksumtype)sig->type;
 775         cksum->length           = sig->signature.buf_len;
 776         cksum->contents         = sig->signature.buffer;
 777 #endif
 778 }
 779
 780  krb5_error_code smb_krb5_verify_checksum(krb5_context context,
 781                                          krb5_keyblock *keyblock,
 782                                          krb5_keyusage usage,
 783                                          krb5_checksum *cksum,
 784                                          uint8 *data,
 785                                          size_t length)
 786 {
 787         krb5_error_code ret;
 788
 789         /* verify the checksum */
 790
 791         /* welcome to the wonderful world of samba's kerberos abstraction layer:
 792          *
 793          * function                     heimdal 0.6.1rc3        heimdal 0.7     MIT krb 1.4.2
 794          * -----------------------------------------------------------------------------
 795          * krb5_c_verify_checksum       -                       works           works
 796          * krb5_verify_checksum         works (6 args)          works (6 args)  broken (7 args)
 797          */
 798
 799 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
 800         {
 801                 krb5_boolean checksum_valid = False;
 802                 krb5_data input;
 803
 804                 input.data = (char *)data;
 805                 input.length = length;
 806
 807                 ret = krb5_c_verify_checksum(context,
 808                                              keyblock,
 809                                              usage,
 810                                              &input,
 811                                              cksum,
 812                                              &checksum_valid);
 813                 if (ret) {
 814                         DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
 815                                 error_message(ret)));
 816                         return ret;
 817                 }
 818
 819                 if (!checksum_valid)
 820                         ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
 821         }
 822
 823 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
 824
 825         /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
 826          * without enctype and it ignores any key_usage types - Guenther */
 827
 828         {
 829
 830                 krb5_crypto crypto;
 831                 ret = krb5_crypto_init(context,
 832                                        keyblock,
 833                                        0,
 834                                        &crypto);
 835                 if (ret) {
 836                         DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
 837                                 error_message(ret)));
 838                         return ret;
 839                 }
 840
 841                 ret = krb5_verify_checksum(context,
 842                                            crypto,
 843                                            usage,
 844                                            data,
 845                                            length,
 846                                            cksum);
 847
 848                 krb5_crypto_destroy(context, crypto);
 849         }
 850
 851 #else
 852 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
 853 #endif
 854
 855         return ret;
 856 }
 857
 858  time_t get_authtime_from_tkt(krb5_ticket *tkt)
 859 {
 860 #if defined(HAVE_KRB5_TKT_ENC_PART2)
 861         return tkt->enc_part2->times.authtime;
 862 #else
 863         return tkt->ticket.authtime;
 864 #endif
 865 }
 866
 867 #ifdef HAVE_KRB5_DECODE_AP_REQ  /* Heimdal */
 868 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
 869 {
 870 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
 871         if (ap_req->ticket->enc_part.kvno)
 872                 return ap_req->ticket->enc_part.kvno;
 873 #else /* Heimdal */
 874         if (ap_req->ticket.enc_part.kvno)
 875                 return *ap_req->ticket.enc_part.kvno;
 876 #endif
 877         return 0;
 878 }
 879
 880 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
 881 {
 882 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
 883         return ap_req->ticket.enc_part.etype;
 884 #else /* MIT */
 885         return ap_req->ticket->enc_part.enctype;
 886 #endif
 887 }
 888 #endif  /* HAVE_KRB5_DECODE_AP_REQ */
 889
 890 static krb5_error_code
 891 get_key_from_keytab(krb5_context context,
 892                     krb5_const_principal server,
 893                     krb5_enctype enctype,
 894                     krb5_kvno kvno,
 895                     krb5_keyblock **out_key)
 896 {
 897         krb5_keytab_entry entry;
 898         krb5_error_code ret;
 899         krb5_keytab keytab;
 900         char *name = NULL;
 901
 902         /* We have to open a new keytab handle here, as MIT does
 903            an implicit open/getnext/close on krb5_kt_get_entry. We
 904            may be in the middle of a keytab enumeration when this is
 905            called. JRA. */
 906
 907         ret = krb5_kt_default(context, &keytab);
 908         if (ret) {
 909                 DEBUG(0,("get_key_from_keytab: failed to open keytab: %s\n", error_message(ret)));
 910                 return ret;
 911         }
 912
 913         if ( DEBUGLEVEL >= 10 ) {
 914                 if (smb_krb5_unparse_name(context, server, &name) == 0) {
 915                         DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
 916                                 kvno, enctype, name));
 917                         SAFE_FREE(name);
 918                 }
 919         }
 920
 921         ret = krb5_kt_get_entry(context,
 922                                 keytab,
 923                                 server,
 924                                 kvno,
 925                                 enctype,
 926                                 &entry);
 927
 928         if (ret) {
 929                 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
 930                 goto out;
 931         }
 932
 933 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
 934         ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
 935 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
 936         ret = krb5_copy_keyblock(context, &entry.key, out_key);
 937 #else
 938 #error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
 939 #endif
 940
 941         if (ret) {
 942                 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
 943                 goto out;
 944         }
 945
 946         smb_krb5_kt_free_entry(context, &entry);
 947
 948 out:
 949         krb5_kt_close(context, keytab);
 950         return ret;
 951 }
 952
 953 /* Prototypes */
 954
 955  krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
 956                                                  const krb5_data *inbuf,
 957                                                  krb5_kvno *kvno,
 958                                                  krb5_enctype *enctype)
 959 {
 960 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
 961         {
 962                 krb5_error_code ret;
 963                 krb5_ap_req ap_req;
 964
 965                 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
 966                 if (ret)
 967                         return ret;
 968
 969                 *kvno = get_kvno_from_ap_req(&ap_req);
 970                 *enctype = get_enctype_from_ap_req(&ap_req);
 971
 972                 free_AP_REQ(&ap_req);
 973                 return 0;
 974         }
 975 #endif
 976
 977         /* Possibly not an appropriate error code. */
 978         return KRB5KDC_ERR_BADOPTION;
 979 }
 980
 981  krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
 982                                                         krb5_auth_context *auth_context,
 983                                                         const krb5_data *inbuf,
 984                                                         krb5_const_principal server,
 985                                                         krb5_keytab keytab,
 986                                                         krb5_flags *ap_req_options,
 987                                                         krb5_ticket **ticket,
 988                                                         krb5_keyblock **keyblock)
 989 {
 990         krb5_error_code ret;
 991         krb5_kvno kvno;
 992         krb5_enctype enctype;
 993         krb5_keyblock *local_keyblock;
 994
 995         ret = krb5_rd_req(context,
 996                           auth_context,
 997                           inbuf,
 998                           server,
 999                           keytab,
1000                           ap_req_options,
1001                           ticket);
1002         if (ret) {
1003                 return ret;
1004         }
1005
1006 #ifdef KRB5_TICKET_HAS_KEYINFO
1007         enctype = (*ticket)->enc_part.enctype;
1008         kvno = (*ticket)->enc_part.kvno;
1009 #else
1010         ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1011         if (ret) {
1012                 return ret;
1013         }
1014 #endif
1015
1016         ret = get_key_from_keytab(context,
1017                                   server,
1018                                   enctype,
1019                                   kvno,
1020                                   &local_keyblock);
1021         if (ret) {
1022                 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1023                 goto out;
1024         }
1025
1026 out:
1027         if (ret && local_keyblock != NULL) {
1028                 krb5_free_keyblock(context, local_keyblock);
1029         } else {
1030                 *keyblock = local_keyblock;
1031         }
1032
1033         return ret;
1034 }
1035
1036  krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1037                                             const char *name,
1038                                             krb5_principal *principal)
1039 {
1040 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1041         return smb_krb5_parse_name_norealm_conv(context, name, principal);
1042 #endif
1043
1044         /* we are cheating here because parse_name will in fact set the realm.
1045          * We don't care as the only caller of smb_krb5_parse_name_norealm
1046          * ignores the realm anyway when calling
1047          * smb_krb5_principal_compare_any_realm later - Guenther */
1048
1049         return smb_krb5_parse_name(context, name, principal);
1050 }
1051
1052  BOOL smb_krb5_principal_compare_any_realm(krb5_context context,
1053                                           krb5_const_principal princ1,
1054                                           krb5_const_principal princ2)
1055 {
1056 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1057
1058         return krb5_principal_compare_any_realm(context, princ1, princ2);
1059
1060 /* krb5_princ_size is a macro in MIT */
1061 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1062
1063         int i, len1, len2;
1064         const krb5_data *p1, *p2;
1065
1066         len1 = krb5_princ_size(context, princ1);
1067         len2 = krb5_princ_size(context, princ2);
1068
1069         if (len1 != len2)
1070                 return False;
1071
1072         for (i = 0; i < len1; i++) {
1073
1074                 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1075                 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1076
1077                 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1078                         return False;
1079         }
1080
1081         return True;
1082 #else
1083 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1084 #endif
1085 }
1086
1087  krb5_error_code smb_krb5_renew_ticket(const char *ccache_string,       /* FILE:/tmp/krb5cc_0 */
1088                                        const char *client_string,       /* gd@BER.SUSE.DE */
1089                                        const char *service_string,      /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1090                                        time_t *new_start_time)
1091 {
1092         krb5_error_code ret;
1093         krb5_context context = NULL;
1094         krb5_ccache ccache = NULL;
1095         krb5_principal client = NULL;
1096
1097         initialize_krb5_error_table();
1098         ret = krb5_init_context(&context);
1099         if (ret) {
1100                 goto done;
1101         }
1102
1103         if (!ccache_string) {
1104                 ccache_string = krb5_cc_default_name(context);
1105         }
1106
1107         DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1108
1109         /* FIXME: we should not fall back to defaults */
1110         ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1111         if (ret) {
1112                 goto done;
1113         }
1114
1115 #ifdef HAVE_KRB5_GET_RENEWED_CREDS      /* MIT */
1116         {
1117                 krb5_creds creds;
1118
1119                 if (client_string) {
1120                         ret = smb_krb5_parse_name(context, client_string, &client);
1121                         if (ret) {
1122                                 goto done;
1123                         }
1124                 } else {
1125                         ret = krb5_cc_get_principal(context, ccache, &client);
1126                         if (ret) {
1127                                 goto done;
1128                         }
1129                 }
1130
1131                 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1132                 if (ret) {
1133                         DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1134                         goto done;
1135                 }
1136
1137                 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1138                 ret = krb5_cc_initialize(context, ccache, client);
1139                 if (ret) {
1140                         goto done;
1141                 }
1142
1143                 ret = krb5_cc_store_cred(context, ccache, &creds);
1144
1145                 if (new_start_time) {
1146                         *new_start_time = (time_t) creds.times.renew_till;
1147                 }
1148
1149                 krb5_free_cred_contents(context, &creds);
1150         }
1151 #elif defined(HAVE_KRB5_GET_KDC_CRED)   /* Heimdal */
1152         {
1153                 krb5_kdc_flags flags;
1154                 krb5_creds creds_in;
1155                 krb5_realm *client_realm;
1156                 krb5_creds *creds;
1157
1158                 memset(&creds_in, 0, sizeof(creds_in));
1159
1160                 if (client_string) {
1161                         ret = smb_krb5_parse_name(context, client_string, &creds_in.client);
1162                         if (ret) {
1163                                 goto done;
1164                         }
1165                 } else {
1166                         ret = krb5_cc_get_principal(context, ccache, &creds_in.client);
1167                         if (ret) {
1168                                 goto done;
1169                         }
1170                 }
1171
1172                 if (service_string) {
1173                         ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1174                         if (ret) {
1175                                 goto done;
1176                         }
1177                 } else {
1178                         /* build tgt service by default */
1179                         client_realm = krb5_princ_realm(context, client);
1180                         ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1181                         if (ret) {
1182                                 goto done;
1183                         }
1184                 }
1185
1186                 flags.i = 0;
1187                 flags.b.renewable = flags.b.renew = True;
1188
1189                 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds);
1190                 if (ret) {
1191                         DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1192                         goto done;
1193                 }
1194
1195                 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1196                 ret = krb5_cc_initialize(context, ccache, creds_in.client);
1197                 if (ret) {
1198                         goto done;
1199                 }
1200
1201                 ret = krb5_cc_store_cred(context, ccache, creds);
1202
1203                 if (new_start_time) {
1204                         *new_start_time = (time_t) creds->times.renew_till;
1205                 }
1206
1207                 krb5_free_cred_contents(context, &creds_in);
1208                 krb5_free_creds(context, creds);
1209         }
1210 #else
1211 #error No suitable krb5 ticket renew function available
1212 #endif
1213
1214
1215 done:
1216         if (client) {
1217                 krb5_free_principal(context, client);
1218         }
1219         if (context) {
1220                 krb5_free_context(context);
1221         }
1222         if (ccache) {
1223                 krb5_cc_close(context, ccache);
1224         }
1225
1226         return ret;
1227
1228 }
1229
1230  krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1231 {
1232         krb5_error_code ret = 0;
1233         if (addr == NULL) {
1234                 return ret;
1235         }
1236 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1237         krb5_free_addresses(context, addr->addrs);
1238 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1239         ret = krb5_free_addresses(context, addr->addrs);
1240         SAFE_FREE(addr->addrs);
1241 #endif
1242         SAFE_FREE(addr);
1243         addr = NULL;
1244         return ret;
1245 }
1246
1247  krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1248 {
1249         krb5_error_code ret = 0;
1250         nstring buf;
1251 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1252         krb5_address **addrs = NULL;
1253 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1254         krb5_addresses *addrs = NULL;
1255 #endif
1256
1257         *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1258         if (*kerb_addr == NULL) {
1259                 return ENOMEM;
1260         }
1261
1262         put_name(buf, global_myname(), ' ', 0x20);
1263
1264 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1265         {
1266                 int num_addr = 2;
1267
1268                 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1269                 if (addrs == NULL) {
1270                         SAFE_FREE(kerb_addr);
1271                         return ENOMEM;
1272                 }
1273
1274                 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1275
1276                 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1277                 if (addrs[0] == NULL) {
1278                         SAFE_FREE(addrs);
1279                         SAFE_FREE(kerb_addr);
1280                         return ENOMEM;
1281                 }
1282
1283                 addrs[0]->magic = KV5M_ADDRESS;
1284                 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1285                 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1286                 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1287                 if (addrs[0]->contents == NULL) {
1288                         SAFE_FREE(addrs[0]);
1289                         SAFE_FREE(addrs);
1290                         SAFE_FREE(kerb_addr);
1291                         return ENOMEM;
1292                 }
1293
1294                 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1295
1296                 addrs[1] = NULL;
1297         }
1298 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1299         {
1300                 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1301                 if (addrs == NULL) {
1302                         SAFE_FREE(kerb_addr);
1303                         return ENOMEM;
1304                 }
1305
1306                 memset(addrs, 0, sizeof(krb5_addresses));
1307
1308                 addrs->len = 1;
1309                 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1310                 if (addrs->val == NULL) {
1311                         SAFE_FREE(addrs);
1312                         SAFE_FREE(kerb_addr);
1313                         return ENOMEM;
1314                 }
1315
1316                 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1317                 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1318                 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1319                 if (addrs->val[0].address.data == NULL) {
1320                         SAFE_FREE(addrs->val);
1321                         SAFE_FREE(addrs);
1322                         SAFE_FREE(kerb_addr);
1323                         return ENOMEM;
1324                 }
1325
1326                 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1327         }
1328 #else
1329 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1330 #endif
1331         (*kerb_addr)->addrs = addrs;
1332
1333         return ret;
1334 }
1335
1336  void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1337 {
1338 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1339         krb5_free_error_contents(context, krberror);
1340 #else /* MIT */
1341         krb5_free_error(context, krberror);
1342 #endif
1343 }
1344
1345  krb5_error_code handle_krberror_packet(krb5_context context,
1346                                         krb5_data *packet)
1347 {
1348         krb5_error_code ret;
1349         BOOL got_error_code = False;
1350
1351         DEBUG(10,("handle_krberror_packet: got error packet\n"));
1352
1353 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1354         {
1355                 krb5_error krberror;
1356
1357                 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1358                         DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1359                                 error_message(ret)));
1360                         return ret;
1361                 }
1362
1363                 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1364                         ret = (krb5_error_code) krberror.error_code;
1365                         got_error_code = True;
1366                 }
1367
1368                 smb_krb5_free_error(context, &krberror);
1369         }
1370 #else /* MIT */
1371         {
1372                 krb5_error *krberror;
1373
1374                 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1375                         DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1376                                 error_message(ret)));
1377                         return ret;
1378                 }
1379
1380                 if (krberror->e_data.data == NULL) {
1381                         ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1382                         got_error_code = True;
1383                 }
1384                 smb_krb5_free_error(context, krberror);
1385         }
1386 #endif
1387         if (got_error_code) {
1388                 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1389                         error_message(ret), ret));
1390         }
1391         return ret;
1392 }
1393
1394  krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1395                                             krb5_get_init_creds_opt **opt)
1396 {
1397 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1398         /* Heimdal or modern MIT version */
1399         return krb5_get_init_creds_opt_alloc(context, opt);
1400 #else
1401         /* Historical MIT version */
1402         krb5_get_init_creds_opt *my_opt;
1403
1404         *opt = NULL;
1405
1406         if ((my_opt = SMB_MALLOC(sizeof(krb5_get_init_creds_opt))) == NULL) {
1407                 return ENOMEM;
1408         }
1409
1410         krb5_get_init_creds_opt_init(my_opt);
1411
1412         *opt =  my_opt;
1413         return 0;
1414 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC  */
1415 }
1416
1417  void smb_krb5_get_init_creds_opt_free(krb5_context context,
1418                                 krb5_get_init_creds_opt *opt)
1419 {
1420 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1421
1422 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1423         /* Modern MIT version */
1424         krb5_get_init_creds_opt_free(context, opt);
1425 #else
1426         /* Heimdal version */
1427         krb5_get_init_creds_opt_free(opt);
1428 #endif
1429
1430 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1431         /* Historical MIT version */
1432         SAFE_FREE(opt);
1433         opt = NULL;
1434 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1435 }
1436
1437  krb5_error_code smb_krb5_mk_error(krb5_context context,
1438                                 krb5_error_code error_code,
1439                                 const krb5_principal server,
1440                                 krb5_data *reply)
1441 {
1442 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1443         /*
1444          * The MIT interface is *terrible*.
1445          * We have to construct this ourselves...
1446          */
1447         krb5_error e;
1448
1449         memset(&e, 0, sizeof(e));
1450         krb5_us_timeofday(context, &e.stime, &e.susec);
1451         e.server = server;
1452 #if defined(krb5_err_base)
1453         e.error = error_code - krb5_err_base;
1454 #elif defined(ERROR_TABLE_BASE_krb5)
1455         e.error = error_code - ERROR_TABLE_BASE_krb5;
1456 #else
1457         e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1458 #endif
1459
1460         return krb5_mk_error(context, &e, reply);
1461 #else /* Heimdal. */
1462         return krb5_mk_error(context,
1463                                 error_code,
1464                                 NULL,
1465                                 NULL, /* e_data */
1466                                 NULL,
1467                                 server,
1468                                 NULL,
1469                                 NULL,
1470                                 reply);
1471 #endif
1472 }
1473
1474 #else /* HAVE_KRB5 */
1475  /* this saves a few linking headaches */
1476  int cli_krb5_get_ticket(const char *principal, time_t time_offset,
1477                         DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
1478                         const char *ccname, time_t *tgs_expire)
1479 {
1480          DEBUG(0,("NO KERBEROS SUPPORT\n"));
1481          return 1;
1482 }
1483
1484 #endif