source/libads/authdata.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    kerberos authorization data (PAC) utility library
   4    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22
  23 #ifdef HAVE_KRB5
  24
  25 static DATA_BLOB unwrap_pac(DATA_BLOB *auth_data)
  26 {
  27         DATA_BLOB pac_contents;
  28         ASN1_DATA data;
  29         int data_type;
  30
  31         asn1_load(&data, *auth_data);
  32         asn1_start_tag(&data, ASN1_SEQUENCE(0));
  33         asn1_start_tag(&data, ASN1_SEQUENCE(0));
  34         asn1_start_tag(&data, ASN1_CONTEXT(0));
  35         asn1_read_Integer(&data, &data_type);
  36         asn1_end_tag(&data);
  37         asn1_start_tag(&data, ASN1_CONTEXT(1));
  38         asn1_read_OctetString(&data, &pac_contents);
  39         asn1_end_tag(&data);
  40         asn1_end_tag(&data);
  41         asn1_end_tag(&data);
  42         asn1_free(&data);
  43         return pac_contents;
  44 }
  45
  46 static BOOL pac_io_unknown_type_10(const char *desc, UNKNOWN_TYPE_10 *type_10,
  47                                    prs_struct *ps, int depth)
  48 {
  49         if (NULL == type_10)
  50                 return False;
  51
  52         prs_debug(ps, depth, desc, "pac_io_unknown_type_10");
  53         depth++;
  54
  55         if (!smb_io_time("unknown_time", &type_10->unknown_time, ps, depth))
  56                 return False;
  57
  58         if (!prs_uint16("len", ps, depth, &type_10->len))
  59                 return False;
  60
  61         if (UNMARSHALLING(ps) && type_10->len) {
  62                 type_10->username = (uint16 *) prs_alloc_mem(ps, type_10->len);
  63                 if (!type_10->username) {
  64                         DEBUG(3, ("No memory available\n"));
  65                         return False;
  66                 }
  67         }
  68
  69         if (!prs_uint16s(True, "name", ps, depth, type_10->username,
  70                          (type_10->len / sizeof(uint16))))
  71                 return False;
  72
  73         return True;
  74
  75 }
  76
  77
  78 static BOOL pac_io_krb_sids(const char *desc, KRB_SID_AND_ATTRS *sid_and_attr,
  79                             prs_struct *ps, int depth)
  80 {
  81         if (NULL == sid_and_attr)
  82                 return False;
  83
  84         prs_debug(ps, depth, desc, "pac_io_krb_sids");
  85         depth++;
  86
  87         if (UNMARSHALLING(ps)) {
  88                 sid_and_attr->sid =
  89                         (DOM_SID2 * ) prs_alloc_mem(ps, sizeof(DOM_SID2));
  90                 if (!sid_and_attr->sid) {
  91                         DEBUG(3, ("No memory available\n"));
  92                         return False;
  93                 }
  94         }
  95
  96         if(!smb_io_dom_sid2("sid", sid_and_attr->sid, ps, depth))
  97                 return False;
  98
  99         return True;
 100 }
 101
 102
 103 static BOOL pac_io_krb_attrs(const char *desc, KRB_SID_AND_ATTRS *sid_and_attr,
 104                              prs_struct *ps, int depth)
 105 {
 106         if (NULL == sid_and_attr)
 107                 return False;
 108
 109         prs_debug(ps, depth, desc, "pac_io_krb_attrs");
 110         depth++;
 111
 112         if (!prs_uint32("sid_ptr", ps, depth, &sid_and_attr->sid_ptr))
 113                 return False;
 114         if (!prs_uint32("attrs", ps, depth, &sid_and_attr->attrs))
 115                 return False;
 116
 117         return True;
 118 }
 119
 120 static BOOL pac_io_krb_sid_and_attr_array(const char *desc,
 121                                           KRB_SID_AND_ATTR_ARRAY *array,
 122                                           uint32 num,
 123                                           prs_struct *ps, int depth)
 124 {
 125         int i;
 126
 127         if (NULL == array)
 128                 return False;
 129
 130         prs_debug(ps, depth, desc, "pac_io_krb_sid_and_attr_array");
 131         depth++;
 132
 133
 134         if (!prs_uint32("count", ps, depth, &array->count))
 135                 return False;
 136
 137         if (UNMARSHALLING(ps)) {
 138                 array->krb_sid_and_attrs = (KRB_SID_AND_ATTRS *)
 139                         prs_alloc_mem(ps, sizeof(KRB_SID_AND_ATTRS) * num);
 140                 if (!array->krb_sid_and_attrs) {
 141                         DEBUG(3, ("No memory available\n"));
 142                         return False;
 143                 }
 144         }
 145
 146         for (i=0; i<num; i++) {
 147                 if (!pac_io_krb_attrs(desc,
 148                                       &array->krb_sid_and_attrs[i],
 149                                       ps, depth))
 150                         return False;
 151
 152         }
 153         for (i=0; i<num; i++) {
 154                 if (!pac_io_krb_sids(desc,
 155                                      &array->krb_sid_and_attrs[i],
 156                                      ps, depth))
 157                         return False;
 158
 159         }
 160
 161         return True;
 162
 163 }
 164
 165 static BOOL pac_io_group_membership(const char *desc,
 166                                     GROUP_MEMBERSHIP *membership,
 167                                     prs_struct *ps, int depth)
 168 {
 169         if (NULL == membership)
 170                 return False;
 171
 172         prs_debug(ps, depth, desc, "pac_io_group_membership");
 173         depth++;
 174
 175         if (!prs_uint32("rid", ps, depth, &membership->rid))
 176                 return False;
 177         if (!prs_uint32("attrs", ps, depth, &membership->attrs))
 178                 return False;
 179
 180         return True;
 181 }
 182
 183
 184 static BOOL pac_io_group_membership_array(const char *desc,
 185                                           GROUP_MEMBERSHIP_ARRAY *array,
 186                                           uint32 num,
 187                                           prs_struct *ps, int depth)
 188 {
 189         int i;
 190
 191         if (NULL == array)
 192                 return False;
 193
 194         prs_debug(ps, depth, desc, "pac_io_group_membership_array");
 195         depth++;
 196
 197
 198         if (!prs_uint32("count", ps, depth, &array->count))
 199                 return False;
 200
 201         if (UNMARSHALLING(ps)) {
 202                 array->group_membership = (GROUP_MEMBERSHIP *)
 203                         prs_alloc_mem(ps, sizeof(GROUP_MEMBERSHIP) * num);
 204                 if (!array->group_membership) {
 205                         DEBUG(3, ("No memory available\n"));
 206                         return False;
 207                 }
 208         }
 209
 210         for (i=0; i<num; i++) {
 211                 if (!pac_io_group_membership(desc,
 212                                              &array->group_membership[i],
 213                                              ps, depth))
 214                         return False;
 215
 216         }
 217
 218         return True;
 219
 220 }
 221
 222 static BOOL pac_io_pac_logon_info(const char *desc, PAC_LOGON_INFO *info,
 223                                   prs_struct *ps, int depth)
 224 {
 225         uint32 garbage;
 226         if (NULL == info)
 227                 return False;
 228
 229         prs_debug(ps, depth, desc, "pac_io_pac_logon_info");
 230         depth++;
 231
 232         if (!prs_uint32("unknown", ps, depth, &garbage))
 233                 return False;
 234         if (!prs_uint32("unknown", ps, depth, &garbage))
 235                 return False;
 236         if (!prs_uint32("bufferlen", ps, depth, &garbage))
 237                 return False;
 238         if (!prs_uint32("bufferlenhi", ps, depth, &garbage))
 239                 return False;
 240         if (!prs_uint32("pointer", ps, depth, &garbage))
 241                 return False;
 242
 243         if (!smb_io_time("logon_time", &info->logon_time, ps, depth))
 244                 return False;
 245         if (!smb_io_time("logoff_time", &info->logoff_time, ps, depth))
 246                 return False;
 247         if (!smb_io_time("kickoff_time", &info->kickoff_time, ps, depth))
 248                 return False;
 249         if (!smb_io_time("pass_last_set_time", &info->pass_last_set_time,
 250                          ps, depth))
 251                 return False;
 252         if (!smb_io_time("pass_can_change_time", &info->pass_can_change_time,
 253                          ps, depth))
 254                 return False;
 255         if (!smb_io_time("pass_must_change_time", &info->pass_must_change_time,
 256                          ps, depth))
 257                 return False;
 258
 259         if (!smb_io_unihdr("hdr_user_name", &info->hdr_user_name, ps, depth))
 260                 return False;
 261         if (!smb_io_unihdr("hdr_full_name", &info->hdr_full_name, ps, depth))
 262                 return False;
 263         if (!smb_io_unihdr("hdr_logon_script", &info->hdr_logon_script,
 264                            ps, depth))
 265                 return False;
 266         if (!smb_io_unihdr("hdr_profile_path", &info->hdr_profile_path,
 267                            ps, depth))
 268                 return False;
 269         if (!smb_io_unihdr("hdr_home_dir", &info->hdr_home_dir, ps, depth))
 270                 return False;
 271         if (!smb_io_unihdr("hdr_dir_drive", &info->hdr_dir_drive, ps, depth))
 272                 return False;
 273
 274         if (!prs_uint16("logon_count", ps, depth, &info->logon_count))
 275                 return False;
 276         if (!prs_uint16("reserved12", ps, depth, &info->reserved12))
 277                 return False;
 278         if (!prs_uint32("user_rid", ps, depth, &info->user_rid))
 279                 return False;
 280         if (!prs_uint32("group_rid", ps, depth, &info->group_rid))
 281                 return False;
 282         if (!prs_uint32("group_count", ps, depth, &info->group_count))
 283                 return False;
 284         /* I haven't seen this contain anything yet, but when it does
 285            we will have to make sure we decode the contents in the middle
 286            all the unistr2s ... */
 287         if (!prs_uint32("group_mem_ptr", ps, depth,
 288                         &info->group_membership_ptr))
 289                 return False;
 290         if (!prs_uint32("user_flags", ps, depth, &info->user_flags))
 291                 return False;
 292
 293         if (!prs_uint32("reserved13.0", ps, depth, &info->reserved13[0]))
 294                 return False;
 295         if (!prs_uint32("reserved13.1", ps, depth, &info->reserved13[1]))
 296                 return False;
 297         if (!prs_uint32("reserved13.2", ps, depth, &info->reserved13[2]))
 298                 return False;
 299         if (!prs_uint32("reserved13.3", ps, depth, &info->reserved13[3]))
 300                 return False;
 301
 302         if (!smb_io_unihdr("hdr_dom_controller",
 303                            &info->hdr_dom_controller, ps, depth))
 304                 return False;
 305         if (!smb_io_unihdr("hdr_dom_name", &info->hdr_dom_name, ps, depth))
 306                 return False;
 307
 308         /* this should be followed, but just get ptr for now */
 309         if (!prs_uint32("ptr_dom_sid", ps, depth, &info->ptr_dom_sid))
 310                 return False;
 311
 312         if (!prs_uint32("reserved16.0", ps, depth, &info->reserved16[0]))
 313                 return False;
 314         if (!prs_uint32("reserved16.1", ps, depth, &info->reserved16[1]))
 315                 return False;
 316
 317         /* might be acb_info */
 318         if (!prs_uint32("reserved17", ps, depth, &info->reserved17))
 319                 return False;
 320
 321
 322         if (!prs_uint32("reserved18.0", ps, depth, &info->reserved18[0]))
 323                 return False;
 324         if (!prs_uint32("reserved18.1", ps, depth, &info->reserved18[1]))
 325                 return False;
 326         if (!prs_uint32("reserved18.2", ps, depth, &info->reserved18[2]))
 327                 return False;
 328         if (!prs_uint32("reserved18.3", ps, depth, &info->reserved18[3]))
 329                 return False;
 330         if (!prs_uint32("reserved18.4", ps, depth, &info->reserved18[4]))
 331                 return False;
 332         if (!prs_uint32("reserved18.5", ps, depth, &info->reserved18[5]))
 333                 return False;
 334         if (!prs_uint32("reserved18.6", ps, depth, &info->reserved18[6]))
 335                 return False;
 336
 337         if (!prs_uint32("sid_count", ps, depth, &info->sid_count))
 338                 return False;
 339         if (!prs_uint32("ptr_extra_sids", ps, depth, &info->ptr_extra_sids))
 340                 return False;
 341         if (!prs_uint32("ptr_res_group_dom_sid", ps, depth,
 342                         &info->ptr_res_group_dom_sid))
 343                 return False;
 344         if (!prs_uint32("res_group_count", ps, depth, &info->res_group_count))
 345                 return False;
 346         if (!prs_uint32("ptr_res_groups", ps, depth, &info->ptr_res_groups))
 347                 return False;
 348
 349         if(!smb_io_unistr2("uni_user_name", &info->uni_user_name,
 350                            info->hdr_user_name.buffer, ps, depth))
 351                 return False;
 352         if(!smb_io_unistr2("uni_full_name", &info->uni_full_name,
 353                            info->hdr_full_name.buffer, ps, depth))
 354                 return False;
 355         if(!smb_io_unistr2("uni_logon_script", &info->uni_logon_script,
 356                            info->hdr_logon_script.buffer, ps, depth))
 357                 return False;
 358         if(!smb_io_unistr2("uni_profile_path", &info->uni_profile_path,
 359                            info->hdr_profile_path.buffer, ps, depth))
 360                 return False;
 361         if(!smb_io_unistr2("uni_home_dir", &info->uni_home_dir,
 362                            info->hdr_home_dir.buffer, ps, depth))
 363                 return False;
 364         if(!smb_io_unistr2("uni_dir_drive", &info->uni_dir_drive,
 365                            info->hdr_dir_drive.buffer, ps, depth))
 366                 return False;
 367
 368         if (info->group_membership_ptr) {
 369                 if (!pac_io_group_membership_array("group membership",
 370                                                    &info->groups,
 371                                                    info->group_count,
 372                                                    ps, depth))
 373                         return False;
 374         }
 375
 376
 377         if(!smb_io_unistr2("uni_dom_controller", &info->uni_dom_controller,
 378                            info->hdr_dom_controller.buffer, ps, depth))
 379                 return False;
 380         if(!smb_io_unistr2("uni_dom_name", &info->uni_dom_name,
 381                            info->hdr_dom_name.buffer, ps, depth))
 382                 return False;
 383
 384         if(info->ptr_dom_sid)
 385                 if(!smb_io_dom_sid2("dom_sid", &info->dom_sid, ps, depth))
 386                         return False;
 387
 388
 389         if (info->sid_count && info->ptr_extra_sids)
 390                 if (!pac_io_krb_sid_and_attr_array("extra_sids",
 391                                                    &info->extra_sids,
 392                                                    info->sid_count,
 393                                                    ps, depth))
 394                         return False;
 395
 396         if (info->ptr_res_group_dom_sid)
 397                 if (!smb_io_dom_sid2("res_group_dom_sid",
 398                                      &info->res_group_dom_sid, ps, depth))
 399                         return False;
 400
 401         if (info->ptr_res_groups)
 402                 if (!pac_io_group_membership_array("res group membership",
 403                                                    &info->res_groups,
 404                                                    info->res_group_count,
 405                                                    ps, depth))
 406                         return False;
 407
 408         return True;
 409 }
 410
 411
 412 static BOOL pac_io_pac_signature_data(const char *desc,
 413                                       PAC_SIGNATURE_DATA *data, uint32 length,
 414                                       prs_struct *ps, int depth)
 415 {
 416         uint32 siglen = length - sizeof(uint32);
 417         if (NULL == data)
 418                 return False;
 419
 420         prs_debug(ps, depth, desc, "pac_io_pac_signature_data");
 421         depth++;
 422
 423         if (!prs_uint32("type", ps, depth, &data->type))
 424                 return False;
 425         if (UNMARSHALLING(ps)) {
 426                 data->signature = (unsigned char *)prs_alloc_mem(ps, siglen);
 427                 if (!data->signature) {
 428                         DEBUG(3, ("No memory available\n"));
 429                         return False;
 430                 }
 431         }
 432         if (!prs_uint8s(False, "signature", ps, depth, data->signature,siglen))
 433                 return False;
 434
 435         return True;
 436 }
 437
 438 static BOOL pac_io_pac_info_hdr_ctr(const char *desc, PAC_INFO_HDR *hdr,
 439                                     prs_struct *ps, int depth)
 440 {
 441         if (NULL == hdr)
 442                 return False;
 443
 444         prs_debug(ps, depth, desc, "pac_io_pac_info_hdr_ctr");
 445         depth++;
 446
 447         if (!prs_align(ps))
 448                 return False;
 449
 450         if (hdr->offset != prs_offset(ps)) {
 451                 DEBUG(5, ("offset in header(x%x) and data(x%x) do not match\n",
 452                           hdr->offset, prs_offset(ps)));
 453                 prs_set_offset(ps, hdr->offset);
 454         }
 455
 456         if (UNMARSHALLING(ps) && hdr->size > 0) {
 457                 hdr->ctr = (PAC_INFO_CTR *)
 458                         prs_alloc_mem(ps, sizeof(PAC_INFO_CTR));
 459                 if (!hdr->ctr) {
 460                         DEBUG(3, ("No memory available\n"));
 461                         return False;
 462                 }
 463         }
 464
 465         switch(hdr->type) {
 466         case PAC_TYPE_LOGON_INFO:
 467                 DEBUG(5, ("PAC_TYPE_LOGON_INFO\n"));
 468                 if (UNMARSHALLING(ps))
 469                         hdr->ctr->pac.logon_info = (PAC_LOGON_INFO *)
 470                                 prs_alloc_mem(ps, sizeof(PAC_LOGON_INFO));
 471                 if (!hdr->ctr->pac.logon_info) {
 472                         DEBUG(3, ("No memory available\n"));
 473                         return False;
 474                 }
 475                 if (!pac_io_pac_logon_info(desc, hdr->ctr->pac.logon_info,
 476                                            ps, depth))
 477                         return False;
 478                 break;
 479
 480         case PAC_TYPE_SERVER_CHECKSUM:
 481                 DEBUG(5, ("PAC_TYPE_SERVER_CHECKSUM\n"));
 482                 if (UNMARSHALLING(ps))
 483                         hdr->ctr->pac.srv_cksum = (PAC_SIGNATURE_DATA *)
 484                                 prs_alloc_mem(ps, sizeof(PAC_SIGNATURE_DATA));
 485                 if (!hdr->ctr->pac.srv_cksum) {
 486                         DEBUG(3, ("No memory available\n"));
 487                         return False;
 488                 }
 489                 if (!pac_io_pac_signature_data(desc, hdr->ctr->pac.srv_cksum,
 490                                                hdr->size, ps, depth))
 491                         return False;
 492                 break;
 493
 494         case PAC_TYPE_PRIVSVR_CHECKSUM:
 495                 DEBUG(5, ("PAC_TYPE_PRIVSVR_CHECKSUM\n"));
 496                 if (UNMARSHALLING(ps))
 497                         hdr->ctr->pac.privsrv_cksum = (PAC_SIGNATURE_DATA *)
 498                                 prs_alloc_mem(ps, sizeof(PAC_SIGNATURE_DATA));
 499                 if (!hdr->ctr->pac.privsrv_cksum) {
 500                         DEBUG(3, ("No memory available\n"));
 501                         return False;
 502                 }
 503                 if (!pac_io_pac_signature_data(desc,
 504                                                hdr->ctr->pac.privsrv_cksum,
 505                                                hdr->size, ps, depth))
 506                         return False;
 507                 break;
 508
 509         case PAC_TYPE_UNKNOWN_10:
 510                 DEBUG(5, ("PAC_TYPE_UNKNOWN_10\n"));
 511                 if (UNMARSHALLING(ps))
 512                         hdr->ctr->pac.type_10 = (UNKNOWN_TYPE_10 *)
 513                                 prs_alloc_mem(ps, sizeof(UNKNOWN_TYPE_10));
 514                 if (!hdr->ctr->pac.type_10) {
 515                         DEBUG(3, ("No memory available\n"));
 516                         return False;
 517                 }
 518                 if (!pac_io_unknown_type_10(desc, hdr->ctr->pac.type_10,
 519                                             ps, depth))
 520                         return False;
 521                 break;
 522
 523         default:
 524                 /* dont' know, so we need to skip it */
 525                 DEBUG(3, ("unknown PAC type %d\n", hdr->type));
 526                 prs_set_offset(ps, prs_offset(ps) + hdr->size);
 527         }
 528
 529         return True;
 530 }
 531
 532 static BOOL pac_io_pac_info_hdr(const char *desc, PAC_INFO_HDR *hdr,
 533                                 prs_struct *ps, int depth)
 534 {
 535         if (NULL == hdr)
 536                 return False;
 537
 538         prs_debug(ps, depth, desc, "pac_io_pac_info_hdr");
 539         depth++;
 540
 541         if (!prs_align(ps))
 542                 return False;
 543         if (!prs_uint32("type", ps, depth, &hdr->type))
 544                 return False;
 545         if (!prs_uint32("size", ps, depth, &hdr->size))
 546                 return False;
 547         if (!prs_uint32("offset", ps, depth, &hdr->offset))
 548                 return False;
 549         if (!prs_uint32("offsethi", ps, depth, &hdr->offsethi))
 550                 return False;
 551
 552         return True;
 553 }
 554
 555 static BOOL pac_io_pac_data(const char *desc, PAC_DATA *data,
 556                             prs_struct *ps, int depth)
 557 {
 558         int i;
 559
 560         if (NULL == data)
 561                 return False;
 562
 563         prs_debug(ps, depth, desc, "pac_io_pac_data");
 564         depth++;
 565
 566         if (!prs_align(ps))
 567                 return False;
 568         if (!prs_uint32("num_buffers", ps, depth, &data->num_buffers))
 569                 return False;
 570         if (!prs_uint32("version", ps, depth, &data->version))
 571                 return False;
 572
 573         if (UNMARSHALLING(ps) && data->num_buffers > 0) {
 574                 if ((data->pac_info_hdr_ptr = (PAC_INFO_HDR *)
 575                      prs_alloc_mem(ps, sizeof(PAC_INFO_HDR) *
 576                                    data->num_buffers)) == NULL) {
 577                         return False;
 578                 }
 579         }
 580
 581         for (i=0; i<data->num_buffers; i++) {
 582                 if (!pac_io_pac_info_hdr(desc, &data->pac_info_hdr_ptr[i], ps,
 583                                          depth))
 584                         return False;
 585         }
 586
 587         for (i=0; i<data->num_buffers; i++) {
 588                 if (!pac_io_pac_info_hdr_ctr(desc, &data->pac_info_hdr_ptr[i],
 589                                              ps, depth))
 590                         return False;
 591         }
 592
 593         return True;
 594 }
 595
 596 PAC_DATA *decode_pac_data(DATA_BLOB *auth_data, TALLOC_CTX *ctx)
 597 {
 598         DATA_BLOB pac_data_blob = unwrap_pac(auth_data);
 599         prs_struct ps;
 600         PAC_DATA *pac_data;
 601
 602         DEBUG(5,("dump_pac_data\n"));
 603         prs_init(&ps, pac_data_blob.length, ctx, UNMARSHALL);
 604         prs_copy_data_in(&ps, (char *)pac_data_blob.data, pac_data_blob.length);
 605         prs_set_offset(&ps, 0);
 606
 607         data_blob_free(&pac_data_blob);
 608
 609         pac_data = (PAC_DATA *) talloc_zero(ctx, sizeof(PAC_DATA));
 610         pac_io_pac_data("pac data", pac_data, &ps, 0);
 611
 612         prs_mem_free(&ps);
 613
 614         return pac_data;
 615 }
 616
 617 #endif