nsswitch/libwbclient/wbc_pwd.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 "replace.h"
  26 #include "libwbclient.h"
  27 #include "../winbind_client.h"
  28
  29 /** @brief The maximum number of pwent structs to get from winbindd
  30  *
  31  */
  32 #define MAX_GETPWENT_USERS 500
  33
  34 /** @brief The maximum number of grent structs to get from winbindd
  35  *
  36  */
  37 #define MAX_GETGRENT_GROUPS 500
  38
  39 /**
  40  *
  41  **/
  42
  43 static void wbcPasswdDestructor(void *ptr)
  44 {
  45         struct passwd *pw = (struct passwd *)ptr;
  46         free(pw->pw_name);
  47         free(pw->pw_passwd);
  48         free(pw->pw_gecos);
  49         free(pw->pw_shell);
  50         free(pw->pw_dir);
  51 }
  52
  53 static struct passwd *copy_passwd_entry(struct winbindd_pw *p)
  54 {
  55         struct passwd *pw = NULL;
  56
  57         pw = (struct passwd *)wbcAllocateMemory(1, sizeof(struct passwd),
  58                                                 wbcPasswdDestructor);
  59         if (pw == NULL) {
  60                 return NULL;
  61         }
  62         pw->pw_name = strdup(p->pw_name);
  63         if (pw->pw_name == NULL) {
  64                 goto fail;
  65         }
  66         pw->pw_passwd = strdup(p->pw_passwd);
  67         if (pw->pw_passwd == NULL) {
  68                 goto fail;
  69         }
  70         pw->pw_gecos = strdup(p->pw_gecos);
  71         if (pw->pw_gecos == NULL) {
  72                 goto fail;
  73         }
  74         pw->pw_shell = strdup(p->pw_shell);
  75         if (pw->pw_shell == NULL) {
  76                 goto fail;
  77         }
  78         pw->pw_dir = strdup(p->pw_dir);
  79         if (pw->pw_dir == NULL) {
  80                 goto fail;
  81         }
  82         pw->pw_uid = p->pw_uid;
  83         pw->pw_gid = p->pw_gid;
  84         return pw;
  85
  86 fail:
  87         wbcFreeMemory(pw);
  88         return NULL;
  89 }
  90
  91 /**
  92  *
  93  **/
  94
  95 static void wbcGroupDestructor(void *ptr)
  96 {
  97         struct group *gr = (struct group *)ptr;
  98         int i;
  99
 100         free(gr->gr_name);
 101         free(gr->gr_passwd);
 102
 103         /* if the array was partly created this can be NULL */
 104         if (gr->gr_mem == NULL) {
 105                 return;
 106         }
 107
 108         for (i=0; gr->gr_mem[i] != NULL; i++) {
 109                 free(gr->gr_mem[i]);
 110         }
 111         free(gr->gr_mem);
 112 }
 113
 114 static struct group *copy_group_entry(struct winbindd_gr *g,
 115                                       char *mem_buf)
 116 {
 117         struct group *gr = NULL;
 118         int i;
 119         char *mem_p, *mem_q;
 120
 121         gr = (struct group *)wbcAllocateMemory(
 122                 1, sizeof(struct group), wbcGroupDestructor);
 123         if (gr == NULL) {
 124                 return NULL;
 125         }
 126
 127         gr->gr_name = strdup(g->gr_name);
 128         if (gr->gr_name == NULL) {
 129                 goto fail;
 130         }
 131         gr->gr_passwd = strdup(g->gr_passwd);
 132         if (gr->gr_passwd == NULL) {
 133                 goto fail;
 134         }
 135         gr->gr_gid = g->gr_gid;
 136
 137         gr->gr_mem = (char **)calloc(g->num_gr_mem+1, sizeof(char *));
 138         if (gr->gr_mem == NULL) {
 139                 goto fail;
 140         }
 141
 142         mem_p = mem_q = mem_buf;
 143         for (i=0; i<g->num_gr_mem && mem_p; i++) {
 144                 mem_q = strchr(mem_p, ',');
 145                 if (mem_q != NULL) {
 146                         *mem_q = '\0';
 147                 }
 148
 149                 gr->gr_mem[i] = strdup(mem_p);
 150                 if (gr->gr_mem[i] == NULL) {
 151                         goto fail;
 152                 }
 153
 154                 if (mem_q == NULL) {
 155                         i += 1;
 156                         break;
 157                 }
 158                 mem_p = mem_q + 1;
 159         }
 160         gr->gr_mem[i] = NULL;
 161
 162         return gr;
 163
 164 fail:
 165         wbcFreeMemory(gr);
 166         return NULL;
 167 }
 168
 169 /* Fill in a struct passwd* for a domain user based on username */
 170 wbcErr wbcGetpwnam(const char *name, struct passwd **pwd)
 171 {
 172         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 173         struct winbindd_request request;
 174         struct winbindd_response response;
 175
 176         if (!name || !pwd) {
 177                 wbc_status = WBC_ERR_INVALID_PARAM;
 178                 BAIL_ON_WBC_ERROR(wbc_status);
 179         }
 180
 181         /* Initialize request */
 182
 183         ZERO_STRUCT(request);
 184         ZERO_STRUCT(response);
 185
 186         /* dst is already null terminated from the memset above */
 187
 188         strncpy(request.data.username, name, sizeof(request.data.username)-1);
 189
 190         wbc_status = wbcRequestResponse(WINBINDD_GETPWNAM,
 191                                         &request,
 192                                         &response);
 193         BAIL_ON_WBC_ERROR(wbc_status);
 194
 195         *pwd = copy_passwd_entry(&response.data.pw);
 196         BAIL_ON_PTR_ERROR(*pwd, wbc_status);
 197
 198  done:
 199         return wbc_status;
 200 }
 201
 202 /* Fill in a struct passwd* for a domain user based on uid */
 203 wbcErr wbcGetpwuid(uid_t uid, struct passwd **pwd)
 204 {
 205         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 206         struct winbindd_request request;
 207         struct winbindd_response response;
 208
 209         if (!pwd) {
 210                 wbc_status = WBC_ERR_INVALID_PARAM;
 211                 BAIL_ON_WBC_ERROR(wbc_status);
 212         }
 213
 214         /* Initialize request */
 215
 216         ZERO_STRUCT(request);
 217         ZERO_STRUCT(response);
 218
 219         request.data.uid = uid;
 220
 221         wbc_status = wbcRequestResponse(WINBINDD_GETPWUID,
 222                                         &request,
 223                                         &response);
 224         BAIL_ON_WBC_ERROR(wbc_status);
 225
 226         *pwd = copy_passwd_entry(&response.data.pw);
 227         BAIL_ON_PTR_ERROR(*pwd, wbc_status);
 228
 229  done:
 230         return wbc_status;
 231 }
 232
 233 /* Fill in a struct passwd* for a domain user based on sid */
 234 wbcErr wbcGetpwsid(struct wbcDomainSid *sid, struct passwd **pwd)
 235 {
 236         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 237         struct winbindd_request request;
 238         struct winbindd_response response;
 239         char * sid_string = NULL;
 240
 241         if (!pwd) {
 242                 wbc_status = WBC_ERR_INVALID_PARAM;
 243                 BAIL_ON_WBC_ERROR(wbc_status);
 244         }
 245
 246         wbc_status = wbcSidToString(sid, &sid_string);
 247         BAIL_ON_WBC_ERROR(wbc_status);
 248
 249         /* Initialize request */
 250
 251         ZERO_STRUCT(request);
 252         ZERO_STRUCT(response);
 253
 254         strncpy(request.data.sid, sid_string, sizeof(request.data.sid));
 255
 256         wbc_status = wbcRequestResponse(WINBINDD_GETPWSID,
 257                                         &request,
 258                                         &response);
 259         BAIL_ON_WBC_ERROR(wbc_status);
 260
 261         *pwd = copy_passwd_entry(&response.data.pw);
 262         BAIL_ON_PTR_ERROR(*pwd, wbc_status);
 263
 264  done:
 265         wbcFreeMemory(sid_string);
 266         return wbc_status;
 267 }
 268
 269 /* Fill in a struct passwd* for a domain user based on username */
 270 wbcErr wbcGetgrnam(const char *name, struct group **grp)
 271 {
 272         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 273         struct winbindd_request request;
 274         struct winbindd_response response;
 275
 276         /* Initialize request */
 277
 278         ZERO_STRUCT(request);
 279         ZERO_STRUCT(response);
 280
 281         if (!name || !grp) {
 282                 wbc_status = WBC_ERR_INVALID_PARAM;
 283                 BAIL_ON_WBC_ERROR(wbc_status);
 284         }
 285
 286         /* dst is already null terminated from the memset above */
 287
 288         strncpy(request.data.groupname, name, sizeof(request.data.groupname)-1);
 289
 290         wbc_status = wbcRequestResponse(WINBINDD_GETGRNAM,
 291                                         &request,
 292                                         &response);
 293         BAIL_ON_WBC_ERROR(wbc_status);
 294
 295         *grp = copy_group_entry(&response.data.gr,
 296                                 (char*)response.extra_data.data);
 297         BAIL_ON_PTR_ERROR(*grp, wbc_status);
 298
 299  done:
 300         winbindd_free_response(&response);
 301
 302         return wbc_status;
 303 }
 304
 305 /* Fill in a struct passwd* for a domain user based on uid */
 306 wbcErr wbcGetgrgid(gid_t gid, struct group **grp)
 307 {
 308         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 309         struct winbindd_request request;
 310         struct winbindd_response response;
 311
 312         /* Initialize request */
 313
 314         ZERO_STRUCT(request);
 315         ZERO_STRUCT(response);
 316
 317         if (!grp) {
 318                 wbc_status = WBC_ERR_INVALID_PARAM;
 319                 BAIL_ON_WBC_ERROR(wbc_status);
 320         }
 321
 322         request.data.gid = gid;
 323
 324         wbc_status = wbcRequestResponse(WINBINDD_GETGRGID,
 325                                         &request,
 326                                         &response);
 327         BAIL_ON_WBC_ERROR(wbc_status);
 328
 329         *grp = copy_group_entry(&response.data.gr,
 330                                 (char*)response.extra_data.data);
 331         BAIL_ON_PTR_ERROR(*grp, wbc_status);
 332
 333  done:
 334         winbindd_free_response(&response);
 335
 336         return wbc_status;
 337 }
 338
 339 /** @brief Number of cached passwd structs
 340  *
 341  */
 342 static uint32_t pw_cache_size;
 343
 344 /** @brief Position of the pwent context
 345  *
 346  */
 347 static uint32_t pw_cache_idx;
 348
 349 /** @brief Winbindd response containing the passwd structs
 350  *
 351  */
 352 static struct winbindd_response pw_response;
 353
 354 /* Reset the passwd iterator */
 355 wbcErr wbcSetpwent(void)
 356 {
 357         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 358
 359         if (pw_cache_size > 0) {
 360                 pw_cache_idx = pw_cache_size = 0;
 361                 winbindd_free_response(&pw_response);
 362         }
 363
 364         ZERO_STRUCT(pw_response);
 365
 366         wbc_status = wbcRequestResponse(WINBINDD_SETPWENT,
 367                                         NULL, NULL);
 368         BAIL_ON_WBC_ERROR(wbc_status);
 369
 370  done:
 371         return wbc_status;
 372 }
 373
 374 /* Close the passwd iterator */
 375 wbcErr wbcEndpwent(void)
 376 {
 377         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 378
 379         if (pw_cache_size > 0) {
 380                 pw_cache_idx = pw_cache_size = 0;
 381                 winbindd_free_response(&pw_response);
 382         }
 383
 384         wbc_status = wbcRequestResponse(WINBINDD_ENDPWENT,
 385                                         NULL, NULL);
 386         BAIL_ON_WBC_ERROR(wbc_status);
 387
 388  done:
 389         return wbc_status;
 390 }
 391
 392 /* Return the next struct passwd* entry from the pwent iterator */
 393 wbcErr wbcGetpwent(struct passwd **pwd)
 394 {
 395         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 396         struct winbindd_request request;
 397         struct winbindd_pw *wb_pw;
 398
 399         /* If there's a cached result, return that. */
 400         if (pw_cache_idx < pw_cache_size) {
 401                 goto return_result;
 402         }
 403
 404         /* Otherwise, query winbindd for some entries. */
 405
 406         pw_cache_idx = 0;
 407
 408         winbindd_free_response(&pw_response);
 409
 410         ZERO_STRUCT(request);
 411         request.data.num_entries = MAX_GETPWENT_USERS;
 412
 413         wbc_status = wbcRequestResponse(WINBINDD_GETPWENT, &request,
 414                                         &pw_response);
 415
 416         BAIL_ON_WBC_ERROR(wbc_status);
 417
 418         pw_cache_size = pw_response.data.num_entries;
 419
 420 return_result:
 421
 422         wb_pw = (struct winbindd_pw *) pw_response.extra_data.data;
 423
 424         *pwd = copy_passwd_entry(&wb_pw[pw_cache_idx]);
 425
 426         BAIL_ON_PTR_ERROR(*pwd, wbc_status);
 427
 428         pw_cache_idx++;
 429
 430 done:
 431         return wbc_status;
 432 }
 433
 434 /** @brief Number of cached group structs
 435  *
 436  */
 437 static uint32_t gr_cache_size;
 438
 439 /** @brief Position of the grent context
 440  *
 441  */
 442 static uint32_t gr_cache_idx;
 443
 444 /** @brief Winbindd response containing the group structs
 445  *
 446  */
 447 static struct winbindd_response gr_response;
 448
 449 /* Reset the group iterator */
 450 wbcErr wbcSetgrent(void)
 451 {
 452         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 453
 454         if (gr_cache_size > 0) {
 455                 gr_cache_idx = gr_cache_size = 0;
 456                 winbindd_free_response(&gr_response);
 457         }
 458
 459         ZERO_STRUCT(gr_response);
 460
 461         wbc_status = wbcRequestResponse(WINBINDD_SETGRENT,
 462                                         NULL, NULL);
 463         BAIL_ON_WBC_ERROR(wbc_status);
 464
 465  done:
 466         return wbc_status;
 467 }
 468
 469 /* Close the group iterator */
 470 wbcErr wbcEndgrent(void)
 471 {
 472         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 473
 474         if (gr_cache_size > 0) {
 475                 gr_cache_idx = gr_cache_size = 0;
 476                 winbindd_free_response(&gr_response);
 477         }
 478
 479         wbc_status = wbcRequestResponse(WINBINDD_ENDGRENT,
 480                                         NULL, NULL);
 481         BAIL_ON_WBC_ERROR(wbc_status);
 482
 483  done:
 484         return wbc_status;
 485 }
 486
 487 /* Return the next struct group* entry from the pwent iterator */
 488 wbcErr wbcGetgrent(struct group **grp)
 489 {
 490         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 491         struct winbindd_request request;
 492         struct winbindd_gr *wb_gr;
 493         uint32_t mem_ofs;
 494
 495         /* If there's a cached result, return that. */
 496         if (gr_cache_idx < gr_cache_size) {
 497                 goto return_result;
 498         }
 499
 500         /* Otherwise, query winbindd for some entries. */
 501
 502         gr_cache_idx = 0;
 503
 504         winbindd_free_response(&gr_response);
 505
 506         ZERO_STRUCT(request);
 507         request.data.num_entries = MAX_GETGRENT_GROUPS;
 508
 509         wbc_status = wbcRequestResponse(WINBINDD_GETGRENT, &request,
 510                                         &gr_response);
 511
 512         BAIL_ON_WBC_ERROR(wbc_status);
 513
 514         gr_cache_size = gr_response.data.num_entries;
 515
 516 return_result:
 517
 518         wb_gr = (struct winbindd_gr *) gr_response.extra_data.data;
 519
 520         mem_ofs = wb_gr[gr_cache_idx].gr_mem_ofs +
 521                   gr_cache_size * sizeof(struct winbindd_gr);
 522
 523         *grp = copy_group_entry(&wb_gr[gr_cache_idx],
 524                                 ((char *)gr_response.extra_data.data)+mem_ofs);
 525
 526         BAIL_ON_PTR_ERROR(*grp, wbc_status);
 527
 528         gr_cache_idx++;
 529
 530 done:
 531         return wbc_status;
 532 }
 533
 534 /* Return the next struct group* entry from the pwent iterator */
 535 wbcErr wbcGetgrlist(struct group **grp)
 536 {
 537         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 538         struct winbindd_request request;
 539         struct winbindd_gr *wb_gr;
 540
 541         /* If there's a cached result, return that. */
 542         if (gr_cache_idx < gr_cache_size) {
 543                 goto return_result;
 544         }
 545
 546         /* Otherwise, query winbindd for some entries. */
 547
 548         gr_cache_idx = 0;
 549
 550         winbindd_free_response(&gr_response);
 551         ZERO_STRUCT(gr_response);
 552
 553         ZERO_STRUCT(request);
 554         request.data.num_entries = MAX_GETGRENT_GROUPS;
 555
 556         wbc_status = wbcRequestResponse(WINBINDD_GETGRLST, &request,
 557                                         &gr_response);
 558
 559         BAIL_ON_WBC_ERROR(wbc_status);
 560
 561         gr_cache_size = gr_response.data.num_entries;
 562
 563 return_result:
 564
 565         wb_gr = (struct winbindd_gr *) gr_response.extra_data.data;
 566
 567         *grp = copy_group_entry(&wb_gr[gr_cache_idx], NULL);
 568
 569         BAIL_ON_PTR_ERROR(*grp, wbc_status);
 570
 571         gr_cache_idx++;
 572
 573 done:
 574         return wbc_status;
 575 }
 576
 577 /* Return the unix group array belonging to the given user */
 578 wbcErr wbcGetGroups(const char *account,
 579                     uint32_t *num_groups,
 580                     gid_t **_groups)
 581 {
 582         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 583         struct winbindd_request request;
 584         struct winbindd_response response;
 585         uint32_t i;
 586         gid_t *groups = NULL;
 587
 588         /* Initialize request */
 589
 590         ZERO_STRUCT(request);
 591         ZERO_STRUCT(response);
 592
 593         if (!account) {
 594                 wbc_status = WBC_ERR_INVALID_PARAM;
 595                 BAIL_ON_WBC_ERROR(wbc_status);
 596         }
 597
 598         /* Send request */
 599
 600         strncpy(request.data.username, account, sizeof(request.data.username)-1);
 601
 602         wbc_status = wbcRequestResponse(WINBINDD_GETGROUPS,
 603                                         &request,
 604                                         &response);
 605         BAIL_ON_WBC_ERROR(wbc_status);
 606
 607         groups = (gid_t *)wbcAllocateMemory(
 608                 sizeof(gid_t), response.data.num_entries, NULL);
 609         BAIL_ON_PTR_ERROR(groups, wbc_status);
 610
 611         for (i = 0; i < response.data.num_entries; i++) {
 612                 groups[i] = ((gid_t *)response.extra_data.data)[i];
 613         }
 614
 615         *num_groups = response.data.num_entries;
 616         *_groups = groups;
 617         groups = NULL;
 618
 619         wbc_status = WBC_ERR_SUCCESS;
 620
 621  done:
 622         winbindd_free_response(&response);
 623         wbcFreeMemory(groups);
 624         return wbc_status;
 625 }