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 smb_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, ("smb_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, ("smb_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, ("smb_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 smb_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 #else /* ! HAVE_KRB5_LOCATE_KDC */
 467
 468  krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
 469                 struct sockaddr **addr_pp, int *naddrs, int get_masters)
 470 {
 471         return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
 472 }
 473
 474 #endif /* HAVE_KRB5_LOCATE_KDC */
 475
 476 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
 477  void krb5_free_unparsed_name(krb5_context context, char *val)
 478 {
 479         SAFE_FREE(val);
 480 }
 481 #endif
 482
 483  void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
 484 {
 485 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
 486         if (pdata->data) {
 487                 krb5_free_data_contents(context, pdata);
 488         }
 489 #else
 490         SAFE_FREE(pdata->data);
 491 #endif
 492 }
 493
 494  void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
 495 {
 496 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
 497         KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
 498 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
 499         KRB5_KEY_TYPE((&pcreds->session)) = enctype;
 500 #else
 501 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
 502 #endif
 503 }
 504
 505  BOOL kerberos_compatible_enctypes(krb5_context context,
 506                                   krb5_enctype enctype1,
 507                                   krb5_enctype enctype2)
 508 {
 509 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
 510         krb5_boolean similar = 0;
 511
 512         krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
 513         return similar ? True : False;
 514 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
 515         return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
 516 #endif
 517 }
 518
 519 static BOOL ads_cleanup_expired_creds(krb5_context context,
 520                                       krb5_ccache  ccache,
 521                                       krb5_creds  *credsp)
 522 {
 523         krb5_error_code retval;
 524         const char *cc_type = krb5_cc_get_type(context, ccache);
 525
 526         DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
 527                   cc_type, krb5_cc_get_name(context, ccache),
 528                   http_timestring(credsp->times.endtime)));
 529
 530         /* we will probably need new tickets if the current ones
 531            will expire within 10 seconds.
 532         */
 533         if (credsp->times.endtime >= (time(NULL) + 10))
 534                 return False;
 535
 536         /* heimdal won't remove creds from a file ccache, and
 537            perhaps we shouldn't anyway, since internally we
 538            use memory ccaches, and a FILE one probably means that
 539            we're using creds obtained outside of our exectuable
 540         */
 541         if (strequal(cc_type, "FILE")) {
 542                 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
 543                 return False;
 544         }
 545
 546         retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
 547         if (retval) {
 548                 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
 549                           error_message(retval)));
 550                 /* If we have an error in this, we want to display it,
 551                    but continue as though we deleted it */
 552         }
 553         return True;
 554 }
 555
 556 /*
 557   we can't use krb5_mk_req because w2k wants the service to be in a particular format
 558 */
 559 static krb5_error_code ads_krb5_mk_req(krb5_context context,
 560                                        krb5_auth_context *auth_context,
 561                                        const krb5_flags ap_req_options,
 562                                        const char *principal,
 563                                        krb5_ccache ccache,
 564                                        krb5_data *outbuf,
 565                                        time_t *expire_time)
 566 {
 567         krb5_error_code           retval;
 568         krb5_principal    server;
 569         krb5_creds              * credsp;
 570         krb5_creds                creds;
 571         krb5_data in_data;
 572         BOOL creds_ready = False;
 573         int i = 0, maxtries = 3;
 574
 575         retval = smb_krb5_parse_name(context, principal, &server);
 576         if (retval) {
 577                 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
 578                 return retval;
 579         }
 580
 581         /* obtain ticket & session key */
 582         ZERO_STRUCT(creds);
 583         if ((retval = krb5_copy_principal(context, server, &creds.server))) {
 584                 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
 585                          error_message(retval)));
 586                 goto cleanup_princ;
 587         }
 588
 589         if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
 590                 /* This can commonly fail on smbd startup with no ticket in the cache.
 591                  * Report at higher level than 1. */
 592                 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
 593                          error_message(retval)));
 594                 goto cleanup_creds;
 595         }
 596
 597         while (!creds_ready && (i < maxtries)) {
 598
 599                 if ((retval = krb5_get_credentials(context, 0, ccache,
 600                                                    &creds, &credsp))) {
 601                         DEBUG(1,("ads_krb5_mk_req: krb5_get_credentials failed for %s (%s)\n",
 602                                  principal, error_message(retval)));
 603                         goto cleanup_creds;
 604                 }
 605
 606                 /* cope with ticket being in the future due to clock skew */
 607                 if ((unsigned)credsp->times.starttime > time(NULL)) {
 608                         time_t t = time(NULL);
 609                         int time_offset =(int)((unsigned)credsp->times.starttime-t);
 610                         DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
 611                         krb5_set_real_time(context, t + time_offset + 1, 0);
 612                 }
 613
 614                 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
 615                         creds_ready = True;
 616                 }
 617
 618                 i++;
 619         }
 620
 621         DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
 622                   principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
 623                   http_timestring((unsigned)credsp->times.endtime),
 624                   (unsigned)credsp->times.endtime));
 625
 626         if (expire_time) {
 627                 *expire_time = (time_t)credsp->times.endtime;
 628         }
 629
 630         in_data.length = 0;
 631         retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
 632                                       &in_data, credsp, outbuf);
 633         if (retval) {
 634                 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
 635                          error_message(retval)));
 636         }
 637
 638         krb5_free_creds(context, credsp);
 639
 640 cleanup_creds:
 641         krb5_free_cred_contents(context, &creds);
 642
 643 cleanup_princ:
 644         krb5_free_principal(context, server);
 645
 646         return retval;
 647 }
 648
 649 /*
 650   get a kerberos5 ticket for the given service
 651 */
 652 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
 653                         DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
 654                         uint32 extra_ap_opts, const char *ccname,
 655                         time_t *tgs_expire)
 656
 657 {
 658         krb5_error_code retval;
 659         krb5_data packet;
 660         krb5_context context = NULL;
 661         krb5_ccache ccdef = NULL;
 662         krb5_auth_context auth_context = NULL;
 663         krb5_enctype enc_types[] = {
 664 #ifdef ENCTYPE_ARCFOUR_HMAC
 665                 ENCTYPE_ARCFOUR_HMAC,
 666 #endif
 667                 ENCTYPE_DES_CBC_MD5,
 668                 ENCTYPE_DES_CBC_CRC,
 669                 ENCTYPE_NULL};
 670
 671         initialize_krb5_error_table();
 672         retval = krb5_init_context(&context);
 673         if (retval) {
 674                 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
 675                          error_message(retval)));
 676                 goto failed;
 677         }
 678
 679         if (time_offset != 0) {
 680                 krb5_set_real_time(context, time(NULL) + time_offset, 0);
 681         }
 682
 683         if ((retval = krb5_cc_resolve(context, ccname ?
 684                         ccname : krb5_cc_default_name(context), &ccdef))) {
 685                 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
 686                          error_message(retval)));
 687                 goto failed;
 688         }
 689
 690         if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
 691                 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
 692                          error_message(retval)));
 693                 goto failed;
 694         }
 695
 696         if ((retval = ads_krb5_mk_req(context,
 697                                         &auth_context,
 698                                         AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
 699                                         principal,
 700                                         ccdef, &packet,
 701                                         tgs_expire))) {
 702                 goto failed;
 703         }
 704
 705         get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
 706
 707         *ticket = data_blob(packet.data, packet.length);
 708
 709         kerberos_free_data_contents(context, &packet);
 710
 711 failed:
 712
 713         if ( context ) {
 714                 if (ccdef)
 715                         krb5_cc_close(context, ccdef);
 716                 if (auth_context)
 717                         krb5_auth_con_free(context, auth_context);
 718                 krb5_free_context(context);
 719         }
 720
 721         return retval;
 722 }
 723
 724  BOOL get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, BOOL remote)
 725  {
 726         krb5_keyblock *skey;
 727         krb5_error_code err;
 728         BOOL ret = False;
 729
 730         if (remote)
 731                 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
 732         else
 733                 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
 734         if (err == 0 && skey != NULL) {
 735                 DEBUG(10, ("Got KRB5 session key of length %d\n",  (int)KRB5_KEY_LENGTH(skey)));
 736                 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
 737                 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
 738
 739                 ret = True;
 740
 741                 krb5_free_keyblock(context, skey);
 742         } else {
 743                 DEBUG(10, ("KRB5 error getting session key %d\n", err));
 744         }
 745
 746         return ret;
 747  }
 748
 749
 750 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
 751  const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
 752
 753  const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
 754 {
 755         static krb5_data kdata;
 756
 757         kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
 758         kdata.length = strlen((const char *)kdata.data);
 759         return &kdata;
 760 }
 761 #endif
 762
 763  krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
 764 {
 765 #if defined(HAVE_KRB5_KT_FREE_ENTRY)
 766         return krb5_kt_free_entry(context, kt_entry);
 767 #elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
 768         return krb5_free_keytab_entry_contents(context, kt_entry);
 769 #else
 770 #error UNKNOWN_KT_FREE_FUNCTION
 771 #endif
 772 }
 773
 774  void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
 775                                     PAC_SIGNATURE_DATA *sig)
 776 {
 777 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
 778         cksum->cksumtype        = (krb5_cksumtype)sig->type;
 779         cksum->checksum.length  = sig->signature.buf_len;
 780         cksum->checksum.data    = sig->signature.buffer;
 781 #else
 782         cksum->checksum_type    = (krb5_cksumtype)sig->type;
 783         cksum->length           = sig->signature.buf_len;
 784         cksum->contents         = sig->signature.buffer;
 785 #endif
 786 }
 787
 788  krb5_error_code smb_krb5_verify_checksum(krb5_context context,
 789                                          krb5_keyblock *keyblock,
 790                                          krb5_keyusage usage,
 791                                          krb5_checksum *cksum,
 792                                          uint8 *data,
 793                                          size_t length)
 794 {
 795         krb5_error_code ret;
 796
 797         /* verify the checksum */
 798
 799         /* welcome to the wonderful world of samba's kerberos abstraction layer:
 800          *
 801          * function                     heimdal 0.6.1rc3        heimdal 0.7     MIT krb 1.4.2
 802          * -----------------------------------------------------------------------------
 803          * krb5_c_verify_checksum       -                       works           works
 804          * krb5_verify_checksum         works (6 args)          works (6 args)  broken (7 args)
 805          */
 806
 807 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
 808         {
 809                 krb5_boolean checksum_valid = False;
 810                 krb5_data input;
 811
 812                 input.data = (char *)data;
 813                 input.length = length;
 814
 815                 ret = krb5_c_verify_checksum(context,
 816                                              keyblock,
 817                                              usage,
 818                                              &input,
 819                                              cksum,
 820                                              &checksum_valid);
 821                 if (ret) {
 822                         DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
 823                                 error_message(ret)));
 824                         return ret;
 825                 }
 826
 827                 if (!checksum_valid)
 828                         ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
 829         }
 830
 831 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
 832
 833         /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
 834          * without enctype and it ignores any key_usage types - Guenther */
 835
 836         {
 837
 838                 krb5_crypto crypto;
 839                 ret = krb5_crypto_init(context,
 840                                        keyblock,
 841                                        0,
 842                                        &crypto);
 843                 if (ret) {
 844                         DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
 845                                 error_message(ret)));
 846                         return ret;
 847                 }
 848
 849                 ret = krb5_verify_checksum(context,
 850                                            crypto,
 851                                            usage,
 852                                            data,
 853                                            length,
 854                                            cksum);
 855
 856                 krb5_crypto_destroy(context, crypto);
 857         }
 858
 859 #else
 860 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
 861 #endif
 862
 863         return ret;
 864 }
 865
 866  time_t get_authtime_from_tkt(krb5_ticket *tkt)
 867 {
 868 #if defined(HAVE_KRB5_TKT_ENC_PART2)
 869         return tkt->enc_part2->times.authtime;
 870 #else
 871         return tkt->ticket.authtime;
 872 #endif
 873 }
 874
 875 #ifdef HAVE_KRB5_DECODE_AP_REQ  /* Heimdal */
 876 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
 877 {
 878 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
 879         if (ap_req->ticket->enc_part.kvno)
 880                 return ap_req->ticket->enc_part.kvno;
 881 #else /* Heimdal */
 882         if (ap_req->ticket.enc_part.kvno)
 883                 return *ap_req->ticket.enc_part.kvno;
 884 #endif
 885         return 0;
 886 }
 887
 888 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
 889 {
 890 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
 891         return ap_req->ticket.enc_part.etype;
 892 #else /* MIT */
 893         return ap_req->ticket->enc_part.enctype;
 894 #endif
 895 }
 896 #endif  /* HAVE_KRB5_DECODE_AP_REQ */
 897
 898 static krb5_error_code
 899 get_key_from_keytab(krb5_context context,
 900                     krb5_const_principal server,
 901                     krb5_enctype enctype,
 902                     krb5_kvno kvno,
 903                     krb5_keyblock **out_key)
 904 {
 905         krb5_keytab_entry entry;
 906         krb5_error_code ret;
 907         krb5_keytab keytab;
 908         char *name = NULL;
 909
 910         /* We have to open a new keytab handle here, as MIT does
 911            an implicit open/getnext/close on krb5_kt_get_entry. We
 912            may be in the middle of a keytab enumeration when this is
 913            called. JRA. */
 914
 915         ret = krb5_kt_default(context, &keytab);
 916         if (ret) {
 917                 DEBUG(0,("get_key_from_keytab: failed to open keytab: %s\n", error_message(ret)));
 918                 return ret;
 919         }
 920
 921         if ( DEBUGLEVEL >= 10 ) {
 922                 if (smb_krb5_unparse_name(context, server, &name) == 0) {
 923                         DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
 924                                 kvno, enctype, name));
 925                         SAFE_FREE(name);
 926                 }
 927         }
 928
 929         ret = krb5_kt_get_entry(context,
 930                                 keytab,
 931                                 server,
 932                                 kvno,
 933                                 enctype,
 934                                 &entry);
 935
 936         if (ret) {
 937                 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
 938                 goto out;
 939         }
 940
 941 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
 942         ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
 943 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
 944         ret = krb5_copy_keyblock(context, &entry.key, out_key);
 945 #else
 946 #error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
 947 #endif
 948
 949         if (ret) {
 950                 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
 951                 goto out;
 952         }
 953
 954         smb_krb5_kt_free_entry(context, &entry);
 955
 956 out:
 957         krb5_kt_close(context, keytab);
 958         return ret;
 959 }
 960
 961 /* Prototypes */
 962
 963  krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
 964                                                  const krb5_data *inbuf,
 965                                                  krb5_kvno *kvno,
 966                                                  krb5_enctype *enctype)
 967 {
 968 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
 969         {
 970                 krb5_error_code ret;
 971                 krb5_ap_req ap_req;
 972
 973                 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
 974                 if (ret)
 975                         return ret;
 976
 977                 *kvno = get_kvno_from_ap_req(&ap_req);
 978                 *enctype = get_enctype_from_ap_req(&ap_req);
 979
 980                 free_AP_REQ(&ap_req);
 981                 return 0;
 982         }
 983 #endif
 984
 985         /* Possibly not an appropriate error code. */
 986         return KRB5KDC_ERR_BADOPTION;
 987 }
 988
 989  krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
 990                                                         krb5_auth_context *auth_context,
 991                                                         const krb5_data *inbuf,
 992                                                         krb5_const_principal server,
 993                                                         krb5_keytab keytab,
 994                                                         krb5_flags *ap_req_options,
 995                                                         krb5_ticket **ticket,
 996                                                         krb5_keyblock **keyblock)
 997 {
 998         krb5_error_code ret;
 999         krb5_kvno kvno;
1000         krb5_enctype enctype;
1001         krb5_keyblock *local_keyblock;
1002
1003         ret = krb5_rd_req(context,
1004                           auth_context,
1005                           inbuf,
1006                           server,
1007                           keytab,
1008                           ap_req_options,
1009                           ticket);
1010         if (ret) {
1011                 return ret;
1012         }
1013
1014 #ifdef KRB5_TICKET_HAS_KEYINFO
1015         enctype = (*ticket)->enc_part.enctype;
1016         kvno = (*ticket)->enc_part.kvno;
1017 #else
1018         ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1019         if (ret) {
1020                 return ret;
1021         }
1022 #endif
1023
1024         ret = get_key_from_keytab(context,
1025                                   server,
1026                                   enctype,
1027                                   kvno,
1028                                   &local_keyblock);
1029         if (ret) {
1030                 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1031                 goto out;
1032         }
1033
1034 out:
1035         if (ret && local_keyblock != NULL) {
1036                 krb5_free_keyblock(context, local_keyblock);
1037         } else {
1038                 *keyblock = local_keyblock;
1039         }
1040
1041         return ret;
1042 }
1043
1044  krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1045                                             const char *name,
1046                                             krb5_principal *principal)
1047 {
1048 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1049         return smb_krb5_parse_name_norealm_conv(context, name, principal);
1050 #endif
1051
1052         /* we are cheating here because parse_name will in fact set the realm.
1053          * We don't care as the only caller of smb_krb5_parse_name_norealm
1054          * ignores the realm anyway when calling
1055          * smb_krb5_principal_compare_any_realm later - Guenther */
1056
1057         return smb_krb5_parse_name(context, name, principal);
1058 }
1059
1060  BOOL smb_krb5_principal_compare_any_realm(krb5_context context,
1061                                           krb5_const_principal princ1,
1062                                           krb5_const_principal princ2)
1063 {
1064 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1065
1066         return krb5_principal_compare_any_realm(context, princ1, princ2);
1067
1068 /* krb5_princ_size is a macro in MIT */
1069 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1070
1071         int i, len1, len2;
1072         const krb5_data *p1, *p2;
1073
1074         len1 = krb5_princ_size(context, princ1);
1075         len2 = krb5_princ_size(context, princ2);
1076
1077         if (len1 != len2)
1078                 return False;
1079
1080         for (i = 0; i < len1; i++) {
1081
1082                 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1083                 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1084
1085                 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1086                         return False;
1087         }
1088
1089         return True;
1090 #else
1091 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1092 #endif
1093 }
1094
1095  krb5_error_code smb_krb5_renew_ticket(const char *ccache_string,       /* FILE:/tmp/krb5cc_0 */
1096                                        const char *client_string,       /* gd@BER.SUSE.DE */
1097                                        const char *service_string,      /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1098                                        time_t *new_start_time)
1099 {
1100         krb5_error_code ret;
1101         krb5_context context = NULL;
1102         krb5_ccache ccache = NULL;
1103         krb5_principal client = NULL;
1104
1105         initialize_krb5_error_table();
1106         ret = krb5_init_context(&context);
1107         if (ret) {
1108                 goto done;
1109         }
1110
1111         if (!ccache_string) {
1112                 ccache_string = krb5_cc_default_name(context);
1113         }
1114
1115         DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1116
1117         /* FIXME: we should not fall back to defaults */
1118         ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1119         if (ret) {
1120                 goto done;
1121         }
1122
1123 #ifdef HAVE_KRB5_GET_RENEWED_CREDS      /* MIT */
1124         {
1125                 krb5_creds creds;
1126
1127                 if (client_string) {
1128                         ret = smb_krb5_parse_name(context, client_string, &client);
1129                         if (ret) {
1130                                 goto done;
1131                         }
1132                 } else {
1133                         ret = krb5_cc_get_principal(context, ccache, &client);
1134                         if (ret) {
1135                                 goto done;
1136                         }
1137                 }
1138
1139                 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1140                 if (ret) {
1141                         DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1142                         goto done;
1143                 }
1144
1145                 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1146                 ret = krb5_cc_initialize(context, ccache, client);
1147                 if (ret) {
1148                         goto done;
1149                 }
1150
1151                 ret = krb5_cc_store_cred(context, ccache, &creds);
1152
1153                 if (new_start_time) {
1154                         *new_start_time = (time_t) creds.times.renew_till;
1155                 }
1156
1157                 krb5_free_cred_contents(context, &creds);
1158         }
1159 #elif defined(HAVE_KRB5_GET_KDC_CRED)   /* Heimdal */
1160         {
1161                 krb5_kdc_flags flags;
1162                 krb5_creds creds_in;
1163                 krb5_realm *client_realm;
1164                 krb5_creds *creds;
1165
1166                 memset(&creds_in, 0, sizeof(creds_in));
1167
1168                 if (client_string) {
1169                         ret = smb_krb5_parse_name(context, client_string, &creds_in.client);
1170                         if (ret) {
1171                                 goto done;
1172                         }
1173                 } else {
1174                         ret = krb5_cc_get_principal(context, ccache, &creds_in.client);
1175                         if (ret) {
1176                                 goto done;
1177                         }
1178                 }
1179
1180                 if (service_string) {
1181                         ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1182                         if (ret) {
1183                                 goto done;
1184                         }
1185                 } else {
1186                         /* build tgt service by default */
1187                         client_realm = krb5_princ_realm(context, client);
1188                         ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1189                         if (ret) {
1190                                 goto done;
1191                         }
1192                 }
1193
1194                 flags.i = 0;
1195                 flags.b.renewable = flags.b.renew = True;
1196
1197                 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds);
1198                 if (ret) {
1199                         DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1200                         goto done;
1201                 }
1202
1203                 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1204                 ret = krb5_cc_initialize(context, ccache, creds_in.client);
1205                 if (ret) {
1206                         goto done;
1207                 }
1208
1209                 ret = krb5_cc_store_cred(context, ccache, creds);
1210
1211                 if (new_start_time) {
1212                         *new_start_time = (time_t) creds->times.renew_till;
1213                 }
1214
1215                 krb5_free_cred_contents(context, &creds_in);
1216                 krb5_free_creds(context, creds);
1217         }
1218 #else
1219 #error No suitable krb5 ticket renew function available
1220 #endif
1221
1222
1223 done:
1224         if (client) {
1225                 krb5_free_principal(context, client);
1226         }
1227         if (context) {
1228                 krb5_free_context(context);
1229         }
1230         if (ccache) {
1231                 krb5_cc_close(context, ccache);
1232         }
1233
1234         return ret;
1235
1236 }
1237
1238  krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1239 {
1240         krb5_error_code ret = 0;
1241         if (addr == NULL) {
1242                 return ret;
1243         }
1244 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1245         krb5_free_addresses(context, addr->addrs);
1246 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1247         ret = krb5_free_addresses(context, addr->addrs);
1248         SAFE_FREE(addr->addrs);
1249 #endif
1250         SAFE_FREE(addr);
1251         addr = NULL;
1252         return ret;
1253 }
1254
1255  krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1256 {
1257         krb5_error_code ret = 0;
1258         nstring buf;
1259 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1260         krb5_address **addrs = NULL;
1261 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1262         krb5_addresses *addrs = NULL;
1263 #endif
1264
1265         *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1266         if (*kerb_addr == NULL) {
1267                 return ENOMEM;
1268         }
1269
1270         put_name(buf, global_myname(), ' ', 0x20);
1271
1272 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1273         {
1274                 int num_addr = 2;
1275
1276                 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1277                 if (addrs == NULL) {
1278                         SAFE_FREE(kerb_addr);
1279                         return ENOMEM;
1280                 }
1281
1282                 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1283
1284                 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1285                 if (addrs[0] == NULL) {
1286                         SAFE_FREE(addrs);
1287                         SAFE_FREE(kerb_addr);
1288                         return ENOMEM;
1289                 }
1290
1291                 addrs[0]->magic = KV5M_ADDRESS;
1292                 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1293                 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1294                 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1295                 if (addrs[0]->contents == NULL) {
1296                         SAFE_FREE(addrs[0]);
1297                         SAFE_FREE(addrs);
1298                         SAFE_FREE(kerb_addr);
1299                         return ENOMEM;
1300                 }
1301
1302                 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1303
1304                 addrs[1] = NULL;
1305         }
1306 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1307         {
1308                 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1309                 if (addrs == NULL) {
1310                         SAFE_FREE(kerb_addr);
1311                         return ENOMEM;
1312                 }
1313
1314                 memset(addrs, 0, sizeof(krb5_addresses));
1315
1316                 addrs->len = 1;
1317                 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1318                 if (addrs->val == NULL) {
1319                         SAFE_FREE(addrs);
1320                         SAFE_FREE(kerb_addr);
1321                         return ENOMEM;
1322                 }
1323
1324                 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1325                 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1326                 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1327                 if (addrs->val[0].address.data == NULL) {
1328                         SAFE_FREE(addrs->val);
1329                         SAFE_FREE(addrs);
1330                         SAFE_FREE(kerb_addr);
1331                         return ENOMEM;
1332                 }
1333
1334                 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1335         }
1336 #else
1337 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1338 #endif
1339         (*kerb_addr)->addrs = addrs;
1340
1341         return ret;
1342 }
1343
1344  void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1345 {
1346 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1347         krb5_free_error_contents(context, krberror);
1348 #else /* MIT */
1349         krb5_free_error(context, krberror);
1350 #endif
1351 }
1352
1353  krb5_error_code handle_krberror_packet(krb5_context context,
1354                                         krb5_data *packet)
1355 {
1356         krb5_error_code ret;
1357         BOOL got_error_code = False;
1358
1359         DEBUG(10,("handle_krberror_packet: got error packet\n"));
1360
1361 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1362         {
1363                 krb5_error krberror;
1364
1365                 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1366                         DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1367                                 error_message(ret)));
1368                         return ret;
1369                 }
1370
1371                 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1372                         ret = (krb5_error_code) krberror.error_code;
1373                         got_error_code = True;
1374                 }
1375
1376                 smb_krb5_free_error(context, &krberror);
1377         }
1378 #else /* MIT */
1379         {
1380                 krb5_error *krberror;
1381
1382                 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1383                         DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1384                                 error_message(ret)));
1385                         return ret;
1386                 }
1387
1388                 if (krberror->e_data.data == NULL) {
1389                         ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1390                         got_error_code = True;
1391                 }
1392                 smb_krb5_free_error(context, krberror);
1393         }
1394 #endif
1395         if (got_error_code) {
1396                 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1397                         error_message(ret), ret));
1398         }
1399         return ret;
1400 }
1401
1402  krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1403                                             krb5_get_init_creds_opt **opt)
1404 {
1405 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1406         /* Heimdal or modern MIT version */
1407         return krb5_get_init_creds_opt_alloc(context, opt);
1408 #else
1409         /* Historical MIT version */
1410         krb5_get_init_creds_opt *my_opt;
1411
1412         *opt = NULL;
1413
1414         if ((my_opt = SMB_MALLOC(sizeof(krb5_get_init_creds_opt))) == NULL) {
1415                 return ENOMEM;
1416         }
1417
1418         krb5_get_init_creds_opt_init(my_opt);
1419
1420         *opt =  my_opt;
1421         return 0;
1422 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC  */
1423 }
1424
1425  void smb_krb5_get_init_creds_opt_free(krb5_context context,
1426                                 krb5_get_init_creds_opt *opt)
1427 {
1428 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1429
1430 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1431         /* Modern MIT version */
1432         krb5_get_init_creds_opt_free(context, opt);
1433 #else
1434         /* Heimdal version */
1435         krb5_get_init_creds_opt_free(opt);
1436 #endif
1437
1438 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1439         /* Historical MIT version */
1440         SAFE_FREE(opt);
1441         opt = NULL;
1442 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1443 }
1444
1445  krb5_error_code smb_krb5_mk_error(krb5_context context,
1446                                 krb5_error_code error_code,
1447                                 const krb5_principal server,
1448                                 krb5_data *reply)
1449 {
1450 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1451         /*
1452          * The MIT interface is *terrible*.
1453          * We have to construct this ourselves...
1454          */
1455         krb5_error e;
1456
1457         memset(&e, 0, sizeof(e));
1458         krb5_us_timeofday(context, &e.stime, &e.susec);
1459         e.server = server;
1460 #if defined(krb5_err_base)
1461         e.error = error_code - krb5_err_base;
1462 #elif defined(ERROR_TABLE_BASE_krb5)
1463         e.error = error_code - ERROR_TABLE_BASE_krb5;
1464 #else
1465         e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1466 #endif
1467
1468         return krb5_mk_error(context, &e, reply);
1469 #else /* Heimdal. */
1470         return krb5_mk_error(context,
1471                                 error_code,
1472                                 NULL,
1473                                 NULL, /* e_data */
1474                                 NULL,
1475                                 server,
1476                                 NULL,
1477                                 NULL,
1478                                 reply);
1479 #endif
1480 }
1481
1482 #else /* HAVE_KRB5 */
1483  /* this saves a few linking headaches */
1484  int cli_krb5_get_ticket(const char *principal, time_t time_offset,
1485                         DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
1486                         const char *ccname, time_t *tgs_expire)
1487 {
1488          DEBUG(0,("NO KERBEROS SUPPORT\n"));
1489          return 1;
1490 }
1491
1492 #endif