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 2005-2007
   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 /* Heimdal */
  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 /* MIT */
  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_edata_ntstatus(TALLOC_CTX *mem_ctx,
 276                            DATA_BLOB *edata,
 277                            DATA_BLOB *edata_out)
 278 {
 279         DATA_BLOB edata_contents;
 280         ASN1_DATA data;
 281         int edata_type;
 282
 283         if (!edata->length) {
 284                 return False;
 285         }
 286
 287         asn1_load(&data, *edata);
 288         asn1_start_tag(&data, ASN1_SEQUENCE(0));
 289         asn1_start_tag(&data, ASN1_CONTEXT(1));
 290         asn1_read_Integer(&data, &edata_type);
 291
 292         if (edata_type != KRB5_PADATA_PW_SALT) {
 293                 DEBUG(0,("edata is not of required type %d but of type %d\n",
 294                         KRB5_PADATA_PW_SALT, edata_type));
 295                 asn1_free(&data);
 296                 return False;
 297         }
 298
 299         asn1_start_tag(&data, ASN1_CONTEXT(2));
 300         asn1_read_OctetString(&data, &edata_contents);
 301         asn1_end_tag(&data);
 302         asn1_end_tag(&data);
 303         asn1_end_tag(&data);
 304         asn1_free(&data);
 305
 306         *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
 307
 308         data_blob_free(&edata_contents);
 309
 310         return True;
 311 }
 312
 313
 314 BOOL unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
 315 {
 316         DATA_BLOB pac_contents;
 317         ASN1_DATA data;
 318         int data_type;
 319
 320         if (!auth_data->length) {
 321                 return False;
 322         }
 323
 324         asn1_load(&data, *auth_data);
 325         asn1_start_tag(&data, ASN1_SEQUENCE(0));
 326         asn1_start_tag(&data, ASN1_SEQUENCE(0));
 327         asn1_start_tag(&data, ASN1_CONTEXT(0));
 328         asn1_read_Integer(&data, &data_type);
 329
 330         if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
 331                 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
 332                 asn1_free(&data);
 333                 return False;
 334         }
 335
 336         asn1_end_tag(&data);
 337         asn1_start_tag(&data, ASN1_CONTEXT(1));
 338         asn1_read_OctetString(&data, &pac_contents);
 339         asn1_end_tag(&data);
 340         asn1_end_tag(&data);
 341         asn1_end_tag(&data);
 342         asn1_free(&data);
 343
 344         *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
 345
 346         data_blob_free(&pac_contents);
 347
 348         return True;
 349 }
 350
 351  BOOL get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
 352 {
 353         DATA_BLOB auth_data_wrapped;
 354         BOOL got_auth_data_pac = False;
 355         int i;
 356
 357 #if defined(HAVE_KRB5_TKT_ENC_PART2)
 358         if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
 359             tkt->enc_part2->authorization_data[0] &&
 360             tkt->enc_part2->authorization_data[0]->length)
 361         {
 362                 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
 363
 364                         if (tkt->enc_part2->authorization_data[i]->ad_type !=
 365                             KRB5_AUTHDATA_IF_RELEVANT) {
 366                                 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
 367                                         tkt->enc_part2->authorization_data[i]->ad_type));
 368                                 continue;
 369                         }
 370
 371                         auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
 372                                                       tkt->enc_part2->authorization_data[i]->length);
 373
 374                         /* check if it is a PAC */
 375                         got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
 376                         data_blob_free(&auth_data_wrapped);
 377
 378                         if (!got_auth_data_pac) {
 379                                 continue;
 380                         }
 381                 }
 382
 383                 return got_auth_data_pac;
 384         }
 385
 386 #else
 387         if (tkt->ticket.authorization_data &&
 388             tkt->ticket.authorization_data->len)
 389         {
 390                 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
 391
 392                         if (tkt->ticket.authorization_data->val[i].ad_type !=
 393                             KRB5_AUTHDATA_IF_RELEVANT) {
 394                                 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
 395                                         tkt->ticket.authorization_data->val[i].ad_type));
 396                                 continue;
 397                         }
 398
 399                         auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
 400                                                       tkt->ticket.authorization_data->val[i].ad_data.length);
 401
 402                         /* check if it is a PAC */
 403                         got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
 404                         data_blob_free(&auth_data_wrapped);
 405
 406                         if (!got_auth_data_pac) {
 407                                 continue;
 408                         }
 409                 }
 410
 411                 return got_auth_data_pac;
 412         }
 413 #endif
 414         return False;
 415 }
 416
 417  krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
 418 {
 419 #if defined(HAVE_KRB5_TKT_ENC_PART2)
 420         return tkt->enc_part2->client;
 421 #else
 422         return tkt->client;
 423 #endif
 424 }
 425
 426 #if !defined(HAVE_KRB5_LOCATE_KDC)
 427
 428 /* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
 429  * to a public interface for this functionality, so we have to be able to live
 430  * without it if the MIT libraries are hiding their internal symbols.
 431  */
 432
 433 #if defined(KRB5_KRBHST_INIT)
 434 /* Heimdal */
 435  krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
 436 {
 437         krb5_krbhst_handle hnd;
 438         krb5_krbhst_info *hinfo;
 439         krb5_error_code rc;
 440         int num_kdcs, i;
 441         struct sockaddr *sa;
 442         struct addrinfo *ai;
 443
 444         *addr_pp = NULL;
 445         *naddrs = 0;
 446
 447         rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
 448         if (rc) {
 449                 DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
 450                 return rc;
 451         }
 452
 453         for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
 454                 ;
 455
 456         krb5_krbhst_reset(ctx, hnd);
 457
 458         if (!num_kdcs) {
 459                 DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
 460                 krb5_krbhst_free(ctx, hnd);
 461                 return -1;
 462         }
 463
 464         sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
 465         if (!sa) {
 466                 DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
 467                 krb5_krbhst_free(ctx, hnd);
 468                 naddrs = 0;
 469                 return -1;
 470         }
 471
 472         memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
 473
 474         for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
 475
 476 #if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
 477                 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
 478                 if (rc) {
 479                         DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
 480                         continue;
 481                 }
 482 #endif
 483                 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
 484                         memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
 485         }
 486
 487         krb5_krbhst_free(ctx, hnd);
 488
 489         *naddrs = num_kdcs;
 490         *addr_pp = sa;
 491         return 0;
 492 }
 493
 494 #else /* ! defined(KRB5_KRBHST_INIT) */
 495
 496  krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
 497                 struct sockaddr **addr_pp, int *naddrs, int get_masters)
 498 {
 499         DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
 500         return KRB5_KDC_UNREACH;
 501 }
 502
 503 #endif /* KRB5_KRBHST_INIT */
 504
 505 #else /* ! HAVE_KRB5_LOCATE_KDC */
 506
 507  krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
 508                 struct sockaddr **addr_pp, int *naddrs, int get_masters)
 509 {
 510         return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
 511 }
 512
 513 #endif /* HAVE_KRB5_LOCATE_KDC */
 514
 515 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
 516  void krb5_free_unparsed_name(krb5_context context, char *val)
 517 {
 518         SAFE_FREE(val);
 519 }
 520 #endif
 521
 522  void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
 523 {
 524 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
 525         if (pdata->data) {
 526                 krb5_free_data_contents(context, pdata);
 527         }
 528 #else
 529         SAFE_FREE(pdata->data);
 530 #endif
 531 }
 532
 533  void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
 534 {
 535 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
 536         KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
 537 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
 538         KRB5_KEY_TYPE((&pcreds->session)) = enctype;
 539 #else
 540 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
 541 #endif
 542 }
 543
 544  BOOL kerberos_compatible_enctypes(krb5_context context,
 545                                   krb5_enctype enctype1,
 546                                   krb5_enctype enctype2)
 547 {
 548 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
 549         krb5_boolean similar = 0;
 550
 551         krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
 552         return similar ? True : False;
 553 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
 554         return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
 555 #endif
 556 }
 557
 558 static BOOL ads_cleanup_expired_creds(krb5_context context,
 559                                       krb5_ccache  ccache,
 560                                       krb5_creds  *credsp)
 561 {
 562         krb5_error_code retval;
 563         const char *cc_type = krb5_cc_get_type(context, ccache);
 564
 565         DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
 566                   cc_type, krb5_cc_get_name(context, ccache),
 567                   http_timestring(credsp->times.endtime)));
 568
 569         /* we will probably need new tickets if the current ones
 570            will expire within 10 seconds.
 571         */
 572         if (credsp->times.endtime >= (time(NULL) + 10))
 573                 return False;
 574
 575         /* heimdal won't remove creds from a file ccache, and
 576            perhaps we shouldn't anyway, since internally we
 577            use memory ccaches, and a FILE one probably means that
 578            we're using creds obtained outside of our exectuable
 579         */
 580         if (strequal(cc_type, "FILE")) {
 581                 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
 582                 return False;
 583         }
 584
 585         retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
 586         if (retval) {
 587                 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
 588                           error_message(retval)));
 589                 /* If we have an error in this, we want to display it,
 590                    but continue as though we deleted it */
 591         }
 592         return True;
 593 }
 594
 595 /*
 596   we can't use krb5_mk_req because w2k wants the service to be in a particular format
 597 */
 598 static krb5_error_code ads_krb5_mk_req(krb5_context context,
 599                                        krb5_auth_context *auth_context,
 600                                        const krb5_flags ap_req_options,
 601                                        const char *principal,
 602                                        krb5_ccache ccache,
 603                                        krb5_data *outbuf,
 604                                        time_t *expire_time)
 605 {
 606         krb5_error_code           retval;
 607         krb5_principal    server;
 608         krb5_creds              * credsp;
 609         krb5_creds                creds;
 610         krb5_data in_data;
 611         BOOL creds_ready = False;
 612         int i = 0, maxtries = 3;
 613
 614         retval = smb_krb5_parse_name(context, principal, &server);
 615         if (retval) {
 616                 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
 617                 return retval;
 618         }
 619
 620         /* obtain ticket & session key */
 621         ZERO_STRUCT(creds);
 622         if ((retval = krb5_copy_principal(context, server, &creds.server))) {
 623                 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
 624                          error_message(retval)));
 625                 goto cleanup_princ;
 626         }
 627
 628         if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
 629                 /* This can commonly fail on smbd startup with no ticket in the cache.
 630                  * Report at higher level than 1. */
 631                 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
 632                          error_message(retval)));
 633                 goto cleanup_creds;
 634         }
 635
 636         while (!creds_ready && (i < maxtries)) {
 637
 638                 if ((retval = krb5_get_credentials(context, 0, ccache,
 639                                                    &creds, &credsp))) {
 640                         DEBUG(1,("ads_krb5_mk_req: krb5_get_credentials failed for %s (%s)\n",
 641                                  principal, error_message(retval)));
 642                         goto cleanup_creds;
 643                 }
 644
 645                 /* cope with ticket being in the future due to clock skew */
 646                 if ((unsigned)credsp->times.starttime > time(NULL)) {
 647                         time_t t = time(NULL);
 648                         int time_offset =(int)((unsigned)credsp->times.starttime-t);
 649                         DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
 650                         krb5_set_real_time(context, t + time_offset + 1, 0);
 651                 }
 652
 653                 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
 654                         creds_ready = True;
 655                 }
 656
 657                 i++;
 658         }
 659
 660         DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
 661                   principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
 662                   http_timestring((unsigned)credsp->times.endtime),
 663                   (unsigned)credsp->times.endtime));
 664
 665         if (expire_time) {
 666                 *expire_time = (time_t)credsp->times.endtime;
 667         }
 668
 669         in_data.length = 0;
 670         retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
 671                                       &in_data, credsp, outbuf);
 672         if (retval) {
 673                 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
 674                          error_message(retval)));
 675         }
 676
 677         krb5_free_creds(context, credsp);
 678
 679 cleanup_creds:
 680         krb5_free_cred_contents(context, &creds);
 681
 682 cleanup_princ:
 683         krb5_free_principal(context, server);
 684
 685         return retval;
 686 }
 687
 688 /*
 689   get a kerberos5 ticket for the given service
 690 */
 691 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
 692                         DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
 693                         uint32 extra_ap_opts, const char *ccname,
 694                         time_t *tgs_expire)
 695
 696 {
 697         krb5_error_code retval;
 698         krb5_data packet;
 699         krb5_context context = NULL;
 700         krb5_ccache ccdef = NULL;
 701         krb5_auth_context auth_context = NULL;
 702         krb5_enctype enc_types[] = {
 703 #ifdef ENCTYPE_ARCFOUR_HMAC
 704                 ENCTYPE_ARCFOUR_HMAC,
 705 #endif
 706                 ENCTYPE_DES_CBC_MD5,
 707                 ENCTYPE_DES_CBC_CRC,
 708                 ENCTYPE_NULL};
 709
 710         initialize_krb5_error_table();
 711         retval = krb5_init_context(&context);
 712         if (retval) {
 713                 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
 714                          error_message(retval)));
 715                 goto failed;
 716         }
 717
 718         if (time_offset != 0) {
 719                 krb5_set_real_time(context, time(NULL) + time_offset, 0);
 720         }
 721
 722         if ((retval = krb5_cc_resolve(context, ccname ?
 723                         ccname : krb5_cc_default_name(context), &ccdef))) {
 724                 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
 725                          error_message(retval)));
 726                 goto failed;
 727         }
 728
 729         if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
 730                 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
 731                          error_message(retval)));
 732                 goto failed;
 733         }
 734
 735         if ((retval = ads_krb5_mk_req(context,
 736                                         &auth_context,
 737                                         AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
 738                                         principal,
 739                                         ccdef, &packet,
 740                                         tgs_expire))) {
 741                 goto failed;
 742         }
 743
 744         get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
 745
 746         *ticket = data_blob(packet.data, packet.length);
 747
 748         kerberos_free_data_contents(context, &packet);
 749
 750 failed:
 751
 752         if ( context ) {
 753                 if (ccdef)
 754                         krb5_cc_close(context, ccdef);
 755                 if (auth_context)
 756                         krb5_auth_con_free(context, auth_context);
 757                 krb5_free_context(context);
 758         }
 759
 760         return retval;
 761 }
 762
 763  BOOL get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, BOOL remote)
 764  {
 765         krb5_keyblock *skey;
 766         krb5_error_code err;
 767         BOOL ret = False;
 768
 769         if (remote)
 770                 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
 771         else
 772                 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
 773         if (err == 0 && skey != NULL) {
 774                 DEBUG(10, ("Got KRB5 session key of length %d\n",  (int)KRB5_KEY_LENGTH(skey)));
 775                 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
 776                 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
 777
 778                 ret = True;
 779
 780                 krb5_free_keyblock(context, skey);
 781         } else {
 782                 DEBUG(10, ("KRB5 error getting session key %d\n", err));
 783         }
 784
 785         return ret;
 786  }
 787
 788
 789 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
 790  const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
 791
 792  const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
 793 {
 794         static krb5_data kdata;
 795
 796         kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
 797         kdata.length = strlen((const char *)kdata.data);
 798         return &kdata;
 799 }
 800 #endif
 801
 802  krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
 803 {
 804 #if defined(HAVE_KRB5_KT_FREE_ENTRY)
 805         return krb5_kt_free_entry(context, kt_entry);
 806 #elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
 807         return krb5_free_keytab_entry_contents(context, kt_entry);
 808 #else
 809 #error UNKNOWN_KT_FREE_FUNCTION
 810 #endif
 811 }
 812
 813  void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
 814                                     PAC_SIGNATURE_DATA *sig)
 815 {
 816 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
 817         cksum->cksumtype        = (krb5_cksumtype)sig->type;
 818         cksum->checksum.length  = sig->signature.buf_len;
 819         cksum->checksum.data    = sig->signature.buffer;
 820 #else
 821         cksum->checksum_type    = (krb5_cksumtype)sig->type;
 822         cksum->length           = sig->signature.buf_len;
 823         cksum->contents         = sig->signature.buffer;
 824 #endif
 825 }
 826
 827  krb5_error_code smb_krb5_verify_checksum(krb5_context context,
 828                                          krb5_keyblock *keyblock,
 829                                          krb5_keyusage usage,
 830                                          krb5_checksum *cksum,
 831                                          uint8 *data,
 832                                          size_t length)
 833 {
 834         krb5_error_code ret;
 835
 836         /* verify the checksum */
 837
 838         /* welcome to the wonderful world of samba's kerberos abstraction layer:
 839          *
 840          * function                     heimdal 0.6.1rc3        heimdal 0.7     MIT krb 1.4.2
 841          * -----------------------------------------------------------------------------
 842          * krb5_c_verify_checksum       -                       works           works
 843          * krb5_verify_checksum         works (6 args)          works (6 args)  broken (7 args)
 844          */
 845
 846 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
 847         {
 848                 krb5_boolean checksum_valid = False;
 849                 krb5_data input;
 850
 851                 input.data = (char *)data;
 852                 input.length = length;
 853
 854                 ret = krb5_c_verify_checksum(context,
 855                                              keyblock,
 856                                              usage,
 857                                              &input,
 858                                              cksum,
 859                                              &checksum_valid);
 860                 if (ret) {
 861                         DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
 862                                 error_message(ret)));
 863                         return ret;
 864                 }
 865
 866                 if (!checksum_valid)
 867                         ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
 868         }
 869
 870 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
 871
 872         /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
 873          * without enctype and it ignores any key_usage types - Guenther */
 874
 875         {
 876
 877                 krb5_crypto crypto;
 878                 ret = krb5_crypto_init(context,
 879                                        keyblock,
 880                                        0,
 881                                        &crypto);
 882                 if (ret) {
 883                         DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
 884                                 error_message(ret)));
 885                         return ret;
 886                 }
 887
 888                 ret = krb5_verify_checksum(context,
 889                                            crypto,
 890                                            usage,
 891                                            data,
 892                                            length,
 893                                            cksum);
 894
 895                 krb5_crypto_destroy(context, crypto);
 896         }
 897
 898 #else
 899 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
 900 #endif
 901
 902         return ret;
 903 }
 904
 905  time_t get_authtime_from_tkt(krb5_ticket *tkt)
 906 {
 907 #if defined(HAVE_KRB5_TKT_ENC_PART2)
 908         return tkt->enc_part2->times.authtime;
 909 #else
 910         return tkt->ticket.authtime;
 911 #endif
 912 }
 913
 914 #ifdef HAVE_KRB5_DECODE_AP_REQ  /* Heimdal */
 915 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
 916 {
 917 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
 918         if (ap_req->ticket->enc_part.kvno)
 919                 return ap_req->ticket->enc_part.kvno;
 920 #else /* Heimdal */
 921         if (ap_req->ticket.enc_part.kvno)
 922                 return *ap_req->ticket.enc_part.kvno;
 923 #endif
 924         return 0;
 925 }
 926
 927 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
 928 {
 929 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
 930         return ap_req->ticket.enc_part.etype;
 931 #else /* MIT */
 932         return ap_req->ticket->enc_part.enctype;
 933 #endif
 934 }
 935 #endif  /* HAVE_KRB5_DECODE_AP_REQ */
 936
 937 static krb5_error_code
 938 get_key_from_keytab(krb5_context context,
 939                     krb5_const_principal server,
 940                     krb5_enctype enctype,
 941                     krb5_kvno kvno,
 942                     krb5_keyblock **out_key)
 943 {
 944         krb5_keytab_entry entry;
 945         krb5_error_code ret;
 946         krb5_keytab keytab;
 947         char *name = NULL;
 948
 949         /* We have to open a new keytab handle here, as MIT does
 950            an implicit open/getnext/close on krb5_kt_get_entry. We
 951            may be in the middle of a keytab enumeration when this is
 952            called. JRA. */
 953
 954         ret = smb_krb5_open_keytab(context, NULL, False, &keytab);
 955         if (ret) {
 956                 DEBUG(1,("get_key_from_keytab: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
 957                 goto out;
 958         }
 959
 960         if ( DEBUGLEVEL >= 10 ) {
 961                 if (smb_krb5_unparse_name(context, server, &name) == 0) {
 962                         DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
 963                                 kvno, enctype, name));
 964                         SAFE_FREE(name);
 965                 }
 966         }
 967
 968         ret = krb5_kt_get_entry(context,
 969                                 keytab,
 970                                 server,
 971                                 kvno,
 972                                 enctype,
 973                                 &entry);
 974
 975         if (ret) {
 976                 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
 977                 goto out;
 978         }
 979
 980 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
 981         ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
 982 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
 983         ret = krb5_copy_keyblock(context, &entry.key, out_key);
 984 #else
 985 #error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
 986 #endif
 987
 988         if (ret) {
 989                 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
 990                 goto out;
 991         }
 992
 993         smb_krb5_kt_free_entry(context, &entry);
 994
 995 out:
 996         krb5_kt_close(context, keytab);
 997         return ret;
 998 }
 999
1000 /* Prototypes */
1001
1002  krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
1003                                                  const krb5_data *inbuf,
1004                                                  krb5_kvno *kvno,
1005                                                  krb5_enctype *enctype)
1006 {
1007 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1008         {
1009                 krb5_error_code ret;
1010                 krb5_ap_req ap_req;
1011
1012                 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
1013                 if (ret)
1014                         return ret;
1015
1016                 *kvno = get_kvno_from_ap_req(&ap_req);
1017                 *enctype = get_enctype_from_ap_req(&ap_req);
1018
1019                 free_AP_REQ(&ap_req);
1020                 return 0;
1021         }
1022 #endif
1023
1024         /* Possibly not an appropriate error code. */
1025         return KRB5KDC_ERR_BADOPTION;
1026 }
1027
1028  krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
1029                                                         krb5_auth_context *auth_context,
1030                                                         const krb5_data *inbuf,
1031                                                         krb5_const_principal server,
1032                                                         krb5_keytab keytab,
1033                                                         krb5_flags *ap_req_options,
1034                                                         krb5_ticket **ticket,
1035                                                         krb5_keyblock **keyblock)
1036 {
1037         krb5_error_code ret;
1038         krb5_kvno kvno;
1039         krb5_enctype enctype;
1040         krb5_keyblock *local_keyblock;
1041
1042         ret = krb5_rd_req(context,
1043                           auth_context,
1044                           inbuf,
1045                           server,
1046                           keytab,
1047                           ap_req_options,
1048                           ticket);
1049         if (ret) {
1050                 return ret;
1051         }
1052
1053 #ifdef KRB5_TICKET_HAS_KEYINFO
1054         enctype = (*ticket)->enc_part.enctype;
1055         kvno = (*ticket)->enc_part.kvno;
1056 #else
1057         ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1058         if (ret) {
1059                 return ret;
1060         }
1061 #endif
1062
1063         ret = get_key_from_keytab(context,
1064                                   server,
1065                                   enctype,
1066                                   kvno,
1067                                   &local_keyblock);
1068         if (ret) {
1069                 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1070                 goto out;
1071         }
1072
1073 out:
1074         if (ret && local_keyblock != NULL) {
1075                 krb5_free_keyblock(context, local_keyblock);
1076         } else {
1077                 *keyblock = local_keyblock;
1078         }
1079
1080         return ret;
1081 }
1082
1083  krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1084                                             const char *name,
1085                                             krb5_principal *principal)
1086 {
1087 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1088         return smb_krb5_parse_name_norealm_conv(context, name, principal);
1089 #endif
1090
1091         /* we are cheating here because parse_name will in fact set the realm.
1092          * We don't care as the only caller of smb_krb5_parse_name_norealm
1093          * ignores the realm anyway when calling
1094          * smb_krb5_principal_compare_any_realm later - Guenther */
1095
1096         return smb_krb5_parse_name(context, name, principal);
1097 }
1098
1099  BOOL smb_krb5_principal_compare_any_realm(krb5_context context,
1100                                           krb5_const_principal princ1,
1101                                           krb5_const_principal princ2)
1102 {
1103 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1104
1105         return krb5_principal_compare_any_realm(context, princ1, princ2);
1106
1107 /* krb5_princ_size is a macro in MIT */
1108 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1109
1110         int i, len1, len2;
1111         const krb5_data *p1, *p2;
1112
1113         len1 = krb5_princ_size(context, princ1);
1114         len2 = krb5_princ_size(context, princ2);
1115
1116         if (len1 != len2)
1117                 return False;
1118
1119         for (i = 0; i < len1; i++) {
1120
1121                 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1122                 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1123
1124                 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1125                         return False;
1126         }
1127
1128         return True;
1129 #else
1130 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1131 #endif
1132 }
1133
1134  krb5_error_code smb_krb5_renew_ticket(const char *ccache_string,       /* FILE:/tmp/krb5cc_0 */
1135                                        const char *client_string,       /* gd@BER.SUSE.DE */
1136                                        const char *service_string,      /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1137                                        time_t *expire_time)
1138 {
1139         krb5_error_code ret;
1140         krb5_context context = NULL;
1141         krb5_ccache ccache = NULL;
1142         krb5_principal client = NULL;
1143         krb5_creds creds, creds_in, *creds_out = NULL;
1144
1145         ZERO_STRUCT(creds);
1146         ZERO_STRUCT(creds_in);
1147
1148         initialize_krb5_error_table();
1149         ret = krb5_init_context(&context);
1150         if (ret) {
1151                 goto done;
1152         }
1153
1154         if (!ccache_string) {
1155                 ccache_string = krb5_cc_default_name(context);
1156         }
1157
1158         if (!ccache_string) {
1159                 ret = EINVAL;
1160                 goto done;
1161         }
1162
1163         DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1164
1165         /* FIXME: we should not fall back to defaults */
1166         ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1167         if (ret) {
1168                 goto done;
1169         }
1170
1171         if (client_string) {
1172                 ret = smb_krb5_parse_name(context, client_string, &client);
1173                 if (ret) {
1174                         goto done;
1175                 }
1176         } else {
1177                 ret = krb5_cc_get_principal(context, ccache, &client);
1178                 if (ret) {
1179                         goto done;
1180                 }
1181         }
1182
1183 #ifdef HAVE_KRB5_GET_RENEWED_CREDS      /* MIT */
1184         {
1185                 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1186                 if (ret) {
1187                         DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1188                         goto done;
1189                 }
1190         }
1191 #elif defined(HAVE_KRB5_GET_KDC_CRED)   /* Heimdal */
1192         {
1193                 krb5_kdc_flags flags;
1194                 krb5_realm *client_realm = NULL;
1195
1196                 ret = krb5_copy_principal(context, client, &creds_in.client);
1197                 if (ret) {
1198                         goto done;
1199                 }
1200
1201                 if (service_string) {
1202                         ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1203                         if (ret) {
1204                                 goto done;
1205                         }
1206                 } else {
1207                         /* build tgt service by default */
1208                         client_realm = krb5_princ_realm(context, creds_in.client);
1209                         if (!client_realm) {
1210                                 ret = ENOMEM;
1211                                 goto done;
1212                         }
1213                         ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1214                         if (ret) {
1215                                 goto done;
1216                         }
1217                 }
1218
1219                 flags.i = 0;
1220                 flags.b.renewable = flags.b.renew = True;
1221
1222                 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds_out);
1223                 if (ret) {
1224                         DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1225                         goto done;
1226                 }
1227
1228                 creds = *creds_out;
1229         }
1230 #else
1231 #error NO_SUITABLE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE
1232 #endif
1233
1234         /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1235         ret = krb5_cc_initialize(context, ccache, client);
1236         if (ret) {
1237                 goto done;
1238         }
1239
1240         ret = krb5_cc_store_cred(context, ccache, &creds);
1241
1242         if (expire_time) {
1243                 *expire_time = (time_t) creds.times.endtime;
1244         }
1245
1246 done:
1247         krb5_free_cred_contents(context, &creds_in);
1248
1249         if (creds_out) {
1250                 krb5_free_creds(context, creds_out);
1251         } else {
1252                 krb5_free_cred_contents(context, &creds);
1253         }
1254
1255         if (client) {
1256                 krb5_free_principal(context, client);
1257         }
1258         if (ccache) {
1259                 krb5_cc_close(context, ccache);
1260         }
1261         if (context) {
1262                 krb5_free_context(context);
1263         }
1264
1265         return ret;
1266 }
1267
1268  krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1269 {
1270         krb5_error_code ret = 0;
1271         if (addr == NULL) {
1272                 return ret;
1273         }
1274 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1275         krb5_free_addresses(context, addr->addrs);
1276 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1277         ret = krb5_free_addresses(context, addr->addrs);
1278         SAFE_FREE(addr->addrs);
1279 #endif
1280         SAFE_FREE(addr);
1281         addr = NULL;
1282         return ret;
1283 }
1284
1285  krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1286 {
1287         krb5_error_code ret = 0;
1288         nstring buf;
1289 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1290         krb5_address **addrs = NULL;
1291 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1292         krb5_addresses *addrs = NULL;
1293 #endif
1294
1295         *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1296         if (*kerb_addr == NULL) {
1297                 return ENOMEM;
1298         }
1299
1300         put_name(buf, global_myname(), ' ', 0x20);
1301
1302 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1303         {
1304                 int num_addr = 2;
1305
1306                 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1307                 if (addrs == NULL) {
1308                         SAFE_FREE(kerb_addr);
1309                         return ENOMEM;
1310                 }
1311
1312                 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1313
1314                 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1315                 if (addrs[0] == NULL) {
1316                         SAFE_FREE(addrs);
1317                         SAFE_FREE(kerb_addr);
1318                         return ENOMEM;
1319                 }
1320
1321                 addrs[0]->magic = KV5M_ADDRESS;
1322                 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1323                 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1324                 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1325                 if (addrs[0]->contents == NULL) {
1326                         SAFE_FREE(addrs[0]);
1327                         SAFE_FREE(addrs);
1328                         SAFE_FREE(kerb_addr);
1329                         return ENOMEM;
1330                 }
1331
1332                 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1333
1334                 addrs[1] = NULL;
1335         }
1336 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1337         {
1338                 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1339                 if (addrs == NULL) {
1340                         SAFE_FREE(kerb_addr);
1341                         return ENOMEM;
1342                 }
1343
1344                 memset(addrs, 0, sizeof(krb5_addresses));
1345
1346                 addrs->len = 1;
1347                 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1348                 if (addrs->val == NULL) {
1349                         SAFE_FREE(addrs);
1350                         SAFE_FREE(kerb_addr);
1351                         return ENOMEM;
1352                 }
1353
1354                 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1355                 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1356                 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1357                 if (addrs->val[0].address.data == NULL) {
1358                         SAFE_FREE(addrs->val);
1359                         SAFE_FREE(addrs);
1360                         SAFE_FREE(kerb_addr);
1361                         return ENOMEM;
1362                 }
1363
1364                 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1365         }
1366 #else
1367 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1368 #endif
1369         (*kerb_addr)->addrs = addrs;
1370
1371         return ret;
1372 }
1373
1374  void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1375 {
1376 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1377         krb5_free_error_contents(context, krberror);
1378 #else /* MIT */
1379         krb5_free_error(context, krberror);
1380 #endif
1381 }
1382
1383  krb5_error_code handle_krberror_packet(krb5_context context,
1384                                         krb5_data *packet)
1385 {
1386         krb5_error_code ret;
1387         BOOL got_error_code = False;
1388
1389         DEBUG(10,("handle_krberror_packet: got error packet\n"));
1390
1391 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1392         {
1393                 krb5_error krberror;
1394
1395                 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1396                         DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1397                                 error_message(ret)));
1398                         return ret;
1399                 }
1400
1401                 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1402                         ret = (krb5_error_code) krberror.error_code;
1403                         got_error_code = True;
1404                 }
1405
1406                 smb_krb5_free_error(context, &krberror);
1407         }
1408 #else /* MIT */
1409         {
1410                 krb5_error *krberror;
1411
1412                 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1413                         DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1414                                 error_message(ret)));
1415                         return ret;
1416                 }
1417
1418                 if (krberror->e_data.data == NULL) {
1419                         ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1420                         got_error_code = True;
1421                 }
1422                 smb_krb5_free_error(context, krberror);
1423         }
1424 #endif
1425         if (got_error_code) {
1426                 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1427                         error_message(ret), ret));
1428         }
1429         return ret;
1430 }
1431
1432  krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1433                                             krb5_get_init_creds_opt **opt)
1434 {
1435 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1436         /* Heimdal or modern MIT version */
1437         return krb5_get_init_creds_opt_alloc(context, opt);
1438 #else
1439         /* Historical MIT version */
1440         krb5_get_init_creds_opt *my_opt;
1441
1442         *opt = NULL;
1443
1444         if ((my_opt = SMB_MALLOC_P(krb5_get_init_creds_opt)) == NULL) {
1445                 return ENOMEM;
1446         }
1447
1448         krb5_get_init_creds_opt_init(my_opt);
1449
1450         *opt =  my_opt;
1451         return 0;
1452 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC  */
1453 }
1454
1455  void smb_krb5_get_init_creds_opt_free(krb5_context context,
1456                                 krb5_get_init_creds_opt *opt)
1457 {
1458 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1459
1460 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1461         /* Modern MIT or Heimdal version */
1462         krb5_get_init_creds_opt_free(context, opt);
1463 #else
1464         /* Heimdal version */
1465         krb5_get_init_creds_opt_free(opt);
1466 #endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */
1467
1468 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1469         /* Historical MIT version */
1470         SAFE_FREE(opt);
1471         opt = NULL;
1472 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1473 }
1474
1475  krb5_enctype smb_get_enctype_from_kt_entry(const krb5_keytab_entry *kt_entry)
1476 {
1477 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEY               /* MIT */
1478         return kt_entry->key.enctype;
1479 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK)  /* Heimdal */
1480         return kt_entry->keyblock.keytype;
1481 #else
1482 #error UNKNOWN_KRB5_KEYTAB_ENTRY_KEYBLOCK_FORMAT
1483 #endif
1484 }
1485
1486
1487 /* caller needs to free etype_s */
1488  krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
1489                                             krb5_enctype enctype,
1490                                             char **etype_s)
1491 {
1492 #ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
1493         return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
1494 #elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
1495         char buf[256];
1496         krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
1497         if (ret) {
1498                 return ret;
1499         }
1500         *etype_s = SMB_STRDUP(buf);
1501         if (!*etype_s) {
1502                 return ENOMEM;
1503         }
1504         return ret;
1505 #else
1506 #error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
1507 #endif
1508 }
1509
1510  krb5_error_code smb_krb5_mk_error(krb5_context context,
1511                                 krb5_error_code error_code,
1512                                 const krb5_principal server,
1513                                 krb5_data *reply)
1514 {
1515 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1516         /*
1517          * The MIT interface is *terrible*.
1518          * We have to construct this ourselves...
1519          */
1520         krb5_error e;
1521
1522         memset(&e, 0, sizeof(e));
1523         krb5_us_timeofday(context, &e.stime, &e.susec);
1524         e.server = server;
1525 #if defined(krb5_err_base)
1526         e.error = error_code - krb5_err_base;
1527 #elif defined(ERROR_TABLE_BASE_krb5)
1528         e.error = error_code - ERROR_TABLE_BASE_krb5;
1529 #else
1530         e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1531 #endif
1532
1533         return krb5_mk_error(context, &e, reply);
1534 #else /* Heimdal. */
1535         return krb5_mk_error(context,
1536                                 error_code,
1537                                 NULL,
1538                                 NULL, /* e_data */
1539                                 NULL,
1540                                 server,
1541                                 NULL,
1542                                 NULL,
1543                                 reply);
1544 #endif
1545 }
1546
1547 /**********************************************************************
1548  * Open a krb5 keytab with flags, handles readonly or readwrite access and
1549  * allows to process non-default keytab names.
1550  * @param context krb5_context
1551  * @param keytab_name_req string
1552  * @param write_access BOOL if writable keytab is required
1553  * @param krb5_keytab pointer to krb5_keytab (close with krb5_kt_close())
1554  * @return krb5_error_code
1555 **********************************************************************/
1556
1557 /* This MAX_NAME_LEN is a constant defined in krb5.h */
1558 #ifndef MAX_KEYTAB_NAME_LEN
1559 #define MAX_KEYTAB_NAME_LEN 1100
1560 #endif
1561
1562  krb5_error_code smb_krb5_open_keytab(krb5_context context,
1563                                       const char *keytab_name_req,
1564                                       BOOL write_access,
1565                                       krb5_keytab *keytab)
1566 {
1567         krb5_error_code ret = 0;
1568         TALLOC_CTX *mem_ctx;
1569         char keytab_string[MAX_KEYTAB_NAME_LEN];
1570         BOOL found_valid_name = False;
1571         const char *pragma = "FILE";
1572         const char *tmp = NULL;
1573
1574         if (!write_access && !keytab_name_req) {
1575                 /* caller just wants to read the default keytab readonly, so be it */
1576                 return krb5_kt_default(context, keytab);
1577         }
1578
1579         mem_ctx = talloc_init("smb_krb5_open_keytab");
1580         if (!mem_ctx) {
1581                 return ENOMEM;
1582         }
1583
1584 #ifdef HAVE_WRFILE_KEYTAB
1585         if (write_access) {
1586                 pragma = "WRFILE";
1587         }
1588 #endif
1589
1590         if (keytab_name_req) {
1591
1592                 if (strlen(keytab_name_req) > MAX_KEYTAB_NAME_LEN) {
1593                         ret = KRB5_CONFIG_NOTENUFSPACE;
1594                         goto out;
1595                 }
1596
1597                 if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
1598                     (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
1599                         tmp = keytab_name_req;
1600                         goto resolve;
1601                 }
1602
1603                 if (keytab_name_req[0] != '/') {
1604                         ret = KRB5_KT_BADNAME;
1605                         goto out;
1606                 }
1607
1608                 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, keytab_name_req);
1609                 if (!tmp) {
1610                         ret = ENOMEM;
1611                         goto out;
1612                 }
1613
1614                 goto resolve;
1615         }
1616
1617         /* we need to handle more complex keytab_strings, like:
1618          * "ANY:FILE:/etc/krb5.keytab,krb4:/etc/srvtab" */
1619
1620         ret = krb5_kt_default_name(context, &keytab_string[0], MAX_KEYTAB_NAME_LEN - 2);
1621         if (ret) {
1622                 goto out;
1623         }
1624
1625         DEBUG(10,("smb_krb5_open_keytab: krb5_kt_default_name returned %s\n", keytab_string));
1626
1627         tmp = talloc_strdup(mem_ctx, keytab_string);
1628         if (!tmp) {
1629                 ret = ENOMEM;
1630                 goto out;
1631         }
1632
1633         if (strncmp(tmp, "ANY:", 4) == 0) {
1634                 tmp += 4;
1635         }
1636
1637         memset(&keytab_string, '\0', sizeof(keytab_string));
1638
1639         while (next_token(&tmp, keytab_string, ",", sizeof(keytab_string))) {
1640
1641                 if (strncmp(keytab_string, "WRFILE:", 7) == 0) {
1642                         found_valid_name = True;
1643                         tmp = keytab_string;
1644                         tmp += 7;
1645                 }
1646
1647                 if (strncmp(keytab_string, "FILE:", 5) == 0) {
1648                         found_valid_name = True;
1649                         tmp = keytab_string;
1650                         tmp += 5;
1651                 }
1652
1653                 if (found_valid_name) {
1654
1655                         if (tmp[0] != '/') {
1656                                 ret = KRB5_KT_BADNAME;
1657                                 goto out;
1658                         }
1659
1660                         tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, tmp);
1661                         if (!tmp) {
1662                                 ret = ENOMEM;
1663                                 goto out;
1664                         }
1665                         break;
1666                 }
1667         }
1668
1669         if (!found_valid_name) {
1670                 ret = KRB5_KT_UNKNOWN_TYPE;
1671                 goto out;
1672         }
1673
1674  resolve:
1675         DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
1676         ret = krb5_kt_resolve(context, tmp, keytab);
1677
1678  out:
1679         TALLOC_FREE(mem_ctx);
1680         return ret;
1681 }
1682
1683 #else /* HAVE_KRB5 */
1684  /* this saves a few linking headaches */
1685  int cli_krb5_get_ticket(const char *principal, time_t time_offset,
1686                         DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
1687                         const char *ccname, time_t *tgs_expire)
1688 {
1689          DEBUG(0,("NO KERBEROS SUPPORT\n"));
1690          return 1;
1691 }
1692
1693 #endif