source3/nsswitch/libwbclient/wbc_sid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind client API
   5
   6    Copyright (C) Gerald (Jerry) Carter 2007
   7
   8
   9    This library is free software; you can redistribute it and/or
  10    modify it under the terms of the GNU Lesser General Public
  11    License as published by the Free Software Foundation; either
  12    version 3 of the License, or (at your option) any later version.
  13
  14    This library 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 GNU
  17    Library General Public License for more details.
  18
  19    You should have received a copy of the GNU Lesser General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 /* Required Headers */
  24
  25 #include "libwbclient.h"
  26
  27
  28 /** @brief Convert a binary SID to a character string
  29  *
  30  * @param sid           Binary Security Identifier
  31  * @param **sid_string  Resulting character string
  32  *
  33  * @return #wbcErr
  34  **/
  35
  36 wbcErr wbcSidToString(const struct wbcDomainSid *sid,
  37                       char **sid_string)
  38 {
  39         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
  40         uint32_t id_auth;
  41         int i;
  42         char *tmp = NULL;
  43         TALLOC_CTX *ctx = NULL;
  44
  45         if (!sid) {
  46                 wbc_status = WBC_ERR_INVALID_SID;
  47                 BAIL_ON_WBC_ERROR(wbc_status);
  48         }
  49
  50         ctx = talloc_init("wbcSidToString");
  51         BAIL_ON_PTR_ERROR(ctx, wbc_status);
  52
  53         id_auth = sid->id_auth[5] +
  54                 (sid->id_auth[4] << 8) +
  55                 (sid->id_auth[3] << 16) +
  56                 (sid->id_auth[2] << 24);
  57
  58         tmp = talloc_asprintf(ctx, "S-%d-%d", sid->sid_rev_num, id_auth);
  59         BAIL_ON_PTR_ERROR(tmp, wbc_status);
  60
  61         for (i=0; i<sid->num_auths; i++) {
  62                 char *tmp2;
  63                 tmp2 = talloc_asprintf_append(tmp, "-%u", sid->sub_auths[i]);
  64                 BAIL_ON_PTR_ERROR(tmp2, wbc_status);
  65
  66                 tmp = tmp2;
  67         }
  68
  69         *sid_string=talloc_strdup(NULL, tmp);
  70         BAIL_ON_PTR_ERROR((*sid_string), wbc_status);
  71
  72         wbc_status = WBC_ERR_SUCCESS;
  73
  74 done:
  75         talloc_free(ctx);
  76
  77         return wbc_status;
  78 }
  79
  80 /** @brief Convert a character string to a binary SID
  81  *
  82  * @param *str          Character string in the form of S-...
  83  * @param sid           Resulting binary SID
  84  *
  85  * @return #wbcErr
  86  **/
  87
  88 wbcErr wbcStringToSid(const char *str,
  89                       struct wbcDomainSid *sid)
  90 {
  91         const char *p;
  92         char *q;
  93         uint32_t x;
  94         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
  95
  96         if (!sid) {
  97                 wbc_status = WBC_ERR_INVALID_PARAM;
  98                 BAIL_ON_WBC_ERROR(wbc_status);
  99         }
 100
 101         /* Sanity check for either "S-" or "s-" */
 102
 103         if (!str
 104             || (str[0]!='S' && str[0]!='s')
 105             || (str[1]!='-'))
 106         {
 107                 wbc_status = WBC_ERR_INVALID_PARAM;
 108                 BAIL_ON_WBC_ERROR(wbc_status);
 109         }
 110
 111         /* Get the SID revision number */
 112
 113         p = str+2;
 114         x = (uint32_t)strtol(p, &q, 10);
 115         if (x==0 || !q || *q!='-') {
 116                 wbc_status = WBC_ERR_INVALID_SID;
 117                 BAIL_ON_WBC_ERROR(wbc_status);
 118         }
 119         sid->sid_rev_num = (uint8_t)x;
 120
 121         /* Next the Identifier Authority.  This is stored in big-endian
 122            in a 6 byte array. */
 123
 124         p = q+1;
 125         x = (uint32_t)strtol(p, &q, 10);
 126         if (x==0 || !q || *q!='-') {
 127                 wbc_status = WBC_ERR_INVALID_SID;
 128                 BAIL_ON_WBC_ERROR(wbc_status);
 129         }
 130         sid->id_auth[5] = (x & 0x000000ff);
 131         sid->id_auth[4] = (x & 0x0000ff00) >> 8;
 132         sid->id_auth[3] = (x & 0x00ff0000) >> 16;
 133         sid->id_auth[2] = (x & 0xff000000) >> 24;
 134         sid->id_auth[1] = 0;
 135         sid->id_auth[0] = 0;
 136
 137         /* now read the the subauthorities */
 138
 139         p = q +1;
 140         sid->num_auths = 0;
 141         while (sid->num_auths < WBC_MAXSUBAUTHS) {
 142                 x=(uint32_t)strtoul(p, &q, 10);
 143                 if (p == q)
 144                         break;
 145                 if (q == NULL) {
 146                         wbc_status = WBC_ERR_INVALID_SID;
 147                         BAIL_ON_WBC_ERROR(wbc_status);
 148                 }
 149                 sid->sub_auths[sid->num_auths++] = x;
 150
 151                 if ((*q!='-') || (*q=='\0'))
 152                         break;
 153                 p = q + 1;
 154         }
 155
 156         /* IF we ended early, then the SID could not be converted */
 157
 158         if (q && *q!='\0') {
 159                 wbc_status = WBC_ERR_INVALID_SID;
 160                 BAIL_ON_WBC_ERROR(wbc_status);
 161         }
 162
 163         wbc_status = WBC_ERR_SUCCESS;
 164
 165 done:
 166         return wbc_status;
 167
 168 }
 169
 170 /** @brief Convert a domain and name to SID
 171  *
 172  * @param domain      Domain name (possibly "")
 173  * @param name        User or group name
 174  * @param *sid        Pointer to the resolved domain SID
 175  * @param *name_type  Pointet to the SID type
 176  *
 177  * @return #wbcErr
 178  *
 179  **/
 180
 181 wbcErr wbcLookupName(const char *domain,
 182                      const char *name,
 183                      struct wbcDomainSid *sid,
 184                      enum wbcSidType *name_type)
 185 {
 186         struct winbindd_request request;
 187         struct winbindd_response response;
 188         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 189
 190         if (!sid || !name_type) {
 191                 wbc_status = WBC_ERR_INVALID_PARAM;
 192                 BAIL_ON_WBC_ERROR(wbc_status);
 193         }
 194
 195         /* Initialize request */
 196
 197         ZERO_STRUCT(request);
 198         ZERO_STRUCT(response);
 199
 200         /* dst is already null terminated from the memset above */
 201
 202         strncpy(request.data.name.dom_name, domain,
 203                 sizeof(request.data.name.dom_name)-1);
 204         strncpy(request.data.name.name, name,
 205                 sizeof(request.data.name.name)-1);
 206
 207         wbc_status = wbcRequestResponse(WINBINDD_LOOKUPNAME,
 208                                         &request,
 209                                         &response);
 210         BAIL_ON_WBC_ERROR(wbc_status);
 211
 212         wbc_status = wbcStringToSid(response.data.sid.sid, sid);
 213         BAIL_ON_WBC_ERROR(wbc_status);
 214
 215         *name_type = (enum wbcSidType)response.data.sid.type;
 216
 217         wbc_status = WBC_ERR_SUCCESS;
 218
 219  done:
 220         return wbc_status;
 221 }
 222
 223 /** @brief Convert a SID to a domain and name
 224  *
 225  * @param *sid        Pointer to the domain SID to be resolved
 226  * @param domain      Resolved Domain name (possibly "")
 227  * @param name        Resolved User or group name
 228  * @param *name_type  Pointet to the resolved SID type
 229  *
 230  * @return #wbcErr
 231  *
 232  **/
 233
 234 wbcErr wbcLookupSid(const struct wbcDomainSid *sid,
 235                     char **pdomain,
 236                     char **pname,
 237                     enum wbcSidType *pname_type)
 238 {
 239         struct winbindd_request request;
 240         struct winbindd_response response;
 241         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 242         char *sid_string = NULL;
 243         char *domain = NULL;
 244         char *name = NULL;
 245         enum wbcSidType name_type = WBC_SID_NAME_USE_NONE;
 246
 247         if (!sid) {
 248                 wbc_status = WBC_ERR_INVALID_PARAM;
 249                 BAIL_ON_WBC_ERROR(wbc_status);
 250         }
 251
 252         /* Initialize request */
 253
 254         ZERO_STRUCT(request);
 255         ZERO_STRUCT(response);
 256
 257         /* dst is already null terminated from the memset above */
 258
 259         wbc_status = wbcSidToString(sid, &sid_string);
 260         BAIL_ON_WBC_ERROR(wbc_status);
 261
 262         strncpy(request.data.sid, sid_string, sizeof(request.data.sid)-1);
 263         wbcFreeMemory(sid_string);
 264
 265         /* Make request */
 266
 267         wbc_status = wbcRequestResponse(WINBINDD_LOOKUPSID,
 268                                            &request,
 269                                            &response);
 270         BAIL_ON_WBC_ERROR(wbc_status);
 271
 272         /* Copy out result */
 273
 274         domain = talloc_strdup(NULL, response.data.name.dom_name);
 275         BAIL_ON_PTR_ERROR(domain, wbc_status);
 276
 277         name = talloc_strdup(NULL, response.data.name.name);
 278         BAIL_ON_PTR_ERROR(name, wbc_status);
 279
 280         name_type = (enum wbcSidType)response.data.name.type;
 281
 282         wbc_status = WBC_ERR_SUCCESS;
 283
 284  done:
 285         if (WBC_ERROR_IS_OK(wbc_status)) {
 286                 if (pdomain != NULL) {
 287                         *pdomain = domain;
 288                 }
 289                 if (pname != NULL) {
 290                         *pname = name;
 291                 }
 292                 if (pname_type != NULL) {
 293                         *pname_type = name_type;
 294                 }
 295         }
 296         else {
 297                 if (name != NULL) {
 298                         talloc_free(name);
 299                 }
 300                 if (domain != NULL) {
 301                         talloc_free(domain);
 302                 }
 303         }
 304
 305         return wbc_status;
 306 }
 307
 308 /** @brief Translate a collection of RIDs within a domain to names
 309  *
 310  **/
 311
 312 wbcErr wbcLookupRids(struct wbcDomainSid *dom_sid,
 313                      int num_rids,
 314                      uint32_t *rids,
 315                      const char **pp_domain_name,
 316                      const char ***pnames,
 317                      enum wbcSidType **ptypes)
 318 {
 319         size_t i, len, ridbuf_size;
 320         char *ridlist;
 321         char *p;
 322         struct winbindd_request request;
 323         struct winbindd_response response;
 324         char *sid_string = NULL;
 325         char *domain_name = NULL;
 326         const char **names = NULL;
 327         enum wbcSidType *types = NULL;
 328         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 329
 330         /* Initialise request */
 331
 332         ZERO_STRUCT(request);
 333         ZERO_STRUCT(response);
 334
 335         if (!dom_sid || (num_rids == 0)) {
 336                 wbc_status = WBC_ERR_INVALID_PARAM;
 337                 BAIL_ON_WBC_ERROR(wbc_status);
 338         }
 339
 340         wbc_status = wbcSidToString(dom_sid, &sid_string);
 341         BAIL_ON_WBC_ERROR(wbc_status);
 342
 343         strncpy(request.data.sid, sid_string, sizeof(request.data.sid)-1);
 344         wbcFreeMemory(sid_string);
 345
 346         /* Even if all the Rids were of maximum 32bit values,
 347            we would only have 11 bytes per rid in the final array
 348            ("4294967296" + \n).  Add one more byte for the
 349            terminating '\0' */
 350
 351         ridbuf_size = (sizeof(char)*11) * num_rids + 1;
 352
 353         ridlist = talloc_zero_array(NULL, char, ridbuf_size);
 354         BAIL_ON_PTR_ERROR(ridlist, wbc_status);
 355
 356         len = 0;
 357         for (i=0; i<num_rids && (len-1)>0; i++) {
 358                 char ridstr[12];
 359
 360                 len = strlen(ridlist);
 361                 p = ridlist + len;
 362
 363                 snprintf( ridstr, sizeof(ridstr)-1, "%u\n", rids[i]);
 364                 strncat(p, ridstr, ridbuf_size-len-1);
 365         }
 366
 367         request.extra_data.data = ridlist;
 368         request.extra_len = strlen(ridlist)+1;
 369
 370         wbc_status = wbcRequestResponse(WINBINDD_LOOKUPRIDS,
 371                                         &request,
 372                                         &response);
 373         talloc_free(ridlist);
 374         BAIL_ON_WBC_ERROR(wbc_status);
 375
 376         domain_name = talloc_strdup(NULL, response.data.domain_name);
 377         BAIL_ON_PTR_ERROR(domain_name, wbc_status);
 378
 379         names = talloc_array(NULL, const char*, num_rids);
 380         BAIL_ON_PTR_ERROR(names, wbc_status);
 381
 382         types = talloc_array(NULL, enum wbcSidType, num_rids);
 383         BAIL_ON_PTR_ERROR(types, wbc_status);
 384
 385         p = (char *)response.extra_data.data;
 386
 387         for (i=0; i<num_rids; i++) {
 388                 char *q;
 389
 390                 if (*p == '\0') {
 391                         wbc_status = WBC_ERR_INVALID_RESPONSE;
 392                         BAIL_ON_WBC_ERROR(wbc_status);
 393                 }
 394
 395                 types[i] = (enum wbcSidType)strtoul(p, &q, 10);
 396
 397                 if (*q != ' ') {
 398                         wbc_status = WBC_ERR_INVALID_RESPONSE;
 399                         BAIL_ON_WBC_ERROR(wbc_status);
 400                 }
 401
 402                 p = q+1;
 403
 404                 if ((q = strchr(p, '\n')) == NULL) {
 405                         wbc_status = WBC_ERR_INVALID_RESPONSE;
 406                         BAIL_ON_WBC_ERROR(wbc_status);
 407                 }
 408
 409                 *q = '\0';
 410
 411                 names[i] = talloc_strdup(names, p);
 412                 BAIL_ON_PTR_ERROR(names[i], wbc_status);
 413
 414                 p = q+1;
 415         }
 416
 417         if (*p != '\0') {
 418                 wbc_status = WBC_ERR_INVALID_RESPONSE;
 419                 BAIL_ON_WBC_ERROR(wbc_status);
 420         }
 421
 422         wbc_status = WBC_ERR_SUCCESS;
 423
 424  done:
 425         if (response.extra_data.data) {
 426                 free(response.extra_data.data);
 427         }
 428
 429         if (WBC_ERROR_IS_OK(wbc_status)) {
 430                 *pp_domain_name = domain_name;
 431                 *pnames = names;
 432                 *ptypes = types;
 433         }
 434         else {
 435                 if (domain_name)
 436                         talloc_free(domain_name);
 437                 if (names)
 438                         talloc_free(names);
 439                 if (types)
 440                         talloc_free(types);
 441         }
 442
 443         return wbc_status;
 444 }
 445
 446 /** @brief Get the groups a user belongs to
 447  *
 448  **/
 449
 450 wbcErr wbcLookupUserSids(const struct wbcDomainSid *user_sid,
 451                          bool domain_groups_only,
 452                          uint32_t *num_sids,
 453                          struct wbcDomainSid **_sids)
 454 {
 455         uint32_t i;
 456         const char *s;
 457         struct winbindd_request request;
 458         struct winbindd_response response;
 459         char *sid_string = NULL;
 460         struct wbcDomainSid *sids = NULL;
 461         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 462         int cmd;
 463
 464         /* Initialise request */
 465
 466         ZERO_STRUCT(request);
 467         ZERO_STRUCT(response);
 468
 469         if (!user_sid) {
 470                 wbc_status = WBC_ERR_INVALID_PARAM;
 471                 BAIL_ON_WBC_ERROR(wbc_status);
 472         }
 473
 474         wbc_status = wbcSidToString(user_sid, &sid_string);
 475         BAIL_ON_WBC_ERROR(wbc_status);
 476
 477         strncpy(request.data.sid, sid_string, sizeof(request.data.sid)-1);
 478         wbcFreeMemory(sid_string);
 479
 480         if (domain_groups_only) {
 481                 cmd = WINBINDD_GETUSERDOMGROUPS;
 482         } else {
 483                 cmd = WINBINDD_GETUSERSIDS;
 484         }
 485
 486         wbc_status = wbcRequestResponse(cmd,
 487                                         &request,
 488                                         &response);
 489         BAIL_ON_WBC_ERROR(wbc_status);
 490
 491         if (response.data.num_entries &&
 492             !response.extra_data.data) {
 493                 wbc_status = WBC_ERR_INVALID_RESPONSE;
 494                 BAIL_ON_WBC_ERROR(wbc_status);
 495         }
 496
 497         sids = talloc_array(NULL, struct wbcDomainSid,
 498                             response.data.num_entries);
 499         BAIL_ON_PTR_ERROR(sids, wbc_status);
 500
 501         s = (const char *)response.extra_data.data;
 502         for (i = 0; i < response.data.num_entries; i++) {
 503                 char *n = strchr(s, '\n');
 504                 if (n) {
 505                         *n = '\0';
 506                 }
 507                 wbc_status = wbcStringToSid(s, &sids[i]);
 508                 BAIL_ON_WBC_ERROR(wbc_status);
 509                 s += strlen(s) + 1;
 510         }
 511
 512         *num_sids = response.data.num_entries;
 513         *_sids = sids;
 514         sids = NULL;
 515         wbc_status = WBC_ERR_SUCCESS;
 516
 517  done:
 518         if (response.extra_data.data) {
 519                 free(response.extra_data.data);
 520         }
 521         if (sids) {
 522                 talloc_free(sids);
 523         }
 524
 525         return wbc_status;
 526 }
 527
 528 /** @brief Lists Users
 529  *
 530  **/
 531
 532 wbcErr wbcListUsers(const char *domain_name,
 533                     uint32_t *_num_users,
 534                     const char ***_users)
 535 {
 536         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 537         struct winbindd_request request;
 538         struct winbindd_response response;
 539         uint32_t num_users = 0;
 540         const char **users = NULL;
 541         const char *next;
 542
 543         /* Initialise request */
 544
 545         ZERO_STRUCT(request);
 546         ZERO_STRUCT(response);
 547
 548         if (domain_name) {
 549                 strncpy(request.domain_name, domain_name,
 550                         sizeof(request.domain_name)-1);
 551         }
 552
 553         wbc_status = wbcRequestResponse(WINBINDD_LIST_USERS,
 554                                         &request,
 555                                         &response);
 556         BAIL_ON_WBC_ERROR(wbc_status);
 557
 558         /* Look through extra data */
 559
 560         next = (const char *)response.extra_data.data;
 561         while (next) {
 562                 const char **tmp;
 563                 const char *current = next;
 564                 char *k = strchr(next, ',');
 565                 if (k) {
 566                         k[0] = '\0';
 567                         next = k+1;
 568                 } else {
 569                         next = NULL;
 570                 }
 571
 572                 tmp = talloc_realloc(NULL, users,
 573                                      const char *,
 574                                      num_users+1);
 575                 BAIL_ON_PTR_ERROR(tmp, wbc_status);
 576                 users = tmp;
 577
 578                 users[num_users] = talloc_strdup(users, current);
 579                 BAIL_ON_PTR_ERROR(users[num_users], wbc_status);
 580
 581                 num_users++;
 582         }
 583
 584         *_num_users = num_users;
 585         *_users = users;
 586         users = NULL;
 587         wbc_status = WBC_ERR_SUCCESS;
 588
 589  done:
 590         if (response.extra_data.data) {
 591                 free(response.extra_data.data);
 592         }
 593         if (users) {
 594                 talloc_free(users);
 595         }
 596         return wbc_status;
 597 }
 598
 599 /** @brief Lists Groups
 600  *
 601  **/
 602
 603 wbcErr wbcListGroups(const char *domain_name,
 604                      uint32_t *_num_groups,
 605                      const char ***_groups)
 606 {
 607         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 608         struct winbindd_request request;
 609         struct winbindd_response response;
 610         uint32_t num_groups = 0;
 611         const char **groups = NULL;
 612         const char *next;
 613
 614         /* Initialise request */
 615
 616         ZERO_STRUCT(request);
 617         ZERO_STRUCT(response);
 618
 619         if (domain_name) {
 620                 strncpy(request.domain_name, domain_name,
 621                         sizeof(request.domain_name)-1);
 622         }
 623
 624         wbc_status = wbcRequestResponse(WINBINDD_LIST_GROUPS,
 625                                         &request,
 626                                         &response);
 627         BAIL_ON_WBC_ERROR(wbc_status);
 628
 629         /* Look through extra data */
 630
 631         next = (const char *)response.extra_data.data;
 632         while (next) {
 633                 const char **tmp;
 634                 const char *current = next;
 635                 char *k = strchr(next, ',');
 636                 if (k) {
 637                         k[0] = '\0';
 638                         next = k+1;
 639                 } else {
 640                         next = NULL;
 641                 }
 642
 643                 tmp = talloc_realloc(NULL, groups,
 644                                      const char *,
 645                                      num_groups+1);
 646                 BAIL_ON_PTR_ERROR(tmp, wbc_status);
 647                 groups = tmp;
 648
 649                 groups[num_groups] = talloc_strdup(groups, current);
 650                 BAIL_ON_PTR_ERROR(groups[num_groups], wbc_status);
 651
 652                 num_groups++;
 653         }
 654
 655         *_num_groups = num_groups;
 656         *_groups = groups;
 657         groups = NULL;
 658         wbc_status = WBC_ERR_SUCCESS;
 659
 660  done:
 661         if (response.extra_data.data) {
 662                 free(response.extra_data.data);
 663         }
 664         if (groups) {
 665                 talloc_free(groups);
 666         }
 667         return wbc_status;
 668 }