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
 240         if (!pwd) {
 241                 wbc_status = WBC_ERR_INVALID_PARAM;
 242                 BAIL_ON_WBC_ERROR(wbc_status);
 243         }
 244
 245         /* Initialize request */
 246
 247         ZERO_STRUCT(request);
 248         ZERO_STRUCT(response);
 249
 250         wbcSidToStringBuf(sid, request.data.sid, sizeof(request.data.sid));
 251
 252         wbc_status = wbcRequestResponse(WINBINDD_GETPWSID,
 253                                         &request,
 254                                         &response);
 255         BAIL_ON_WBC_ERROR(wbc_status);
 256
 257         *pwd = copy_passwd_entry(&response.data.pw);
 258         BAIL_ON_PTR_ERROR(*pwd, wbc_status);
 259
 260  done:
 261         return wbc_status;
 262 }
 263
 264 /* Fill in a struct passwd* for a domain user based on username */
 265 wbcErr wbcGetgrnam(const char *name, struct group **grp)
 266 {
 267         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 268         struct winbindd_request request;
 269         struct winbindd_response response;
 270
 271         /* Initialize request */
 272
 273         ZERO_STRUCT(request);
 274         ZERO_STRUCT(response);
 275
 276         if (!name || !grp) {
 277                 wbc_status = WBC_ERR_INVALID_PARAM;
 278                 BAIL_ON_WBC_ERROR(wbc_status);
 279         }
 280
 281         /* dst is already null terminated from the memset above */
 282
 283         strncpy(request.data.groupname, name, sizeof(request.data.groupname)-1);
 284
 285         wbc_status = wbcRequestResponse(WINBINDD_GETGRNAM,
 286                                         &request,
 287                                         &response);
 288         BAIL_ON_WBC_ERROR(wbc_status);
 289
 290         *grp = copy_group_entry(&response.data.gr,
 291                                 (char*)response.extra_data.data);
 292         BAIL_ON_PTR_ERROR(*grp, wbc_status);
 293
 294  done:
 295         winbindd_free_response(&response);
 296
 297         return wbc_status;
 298 }
 299
 300 /* Fill in a struct passwd* for a domain user based on uid */
 301 wbcErr wbcGetgrgid(gid_t gid, struct group **grp)
 302 {
 303         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 304         struct winbindd_request request;
 305         struct winbindd_response response;
 306
 307         /* Initialize request */
 308
 309         ZERO_STRUCT(request);
 310         ZERO_STRUCT(response);
 311
 312         if (!grp) {
 313                 wbc_status = WBC_ERR_INVALID_PARAM;
 314                 BAIL_ON_WBC_ERROR(wbc_status);
 315         }
 316
 317         request.data.gid = gid;
 318
 319         wbc_status = wbcRequestResponse(WINBINDD_GETGRGID,
 320                                         &request,
 321                                         &response);
 322         BAIL_ON_WBC_ERROR(wbc_status);
 323
 324         *grp = copy_group_entry(&response.data.gr,
 325                                 (char*)response.extra_data.data);
 326         BAIL_ON_PTR_ERROR(*grp, wbc_status);
 327
 328  done:
 329         winbindd_free_response(&response);
 330
 331         return wbc_status;
 332 }
 333
 334 /** @brief Number of cached passwd structs
 335  *
 336  */
 337 static uint32_t pw_cache_size;
 338
 339 /** @brief Position of the pwent context
 340  *
 341  */
 342 static uint32_t pw_cache_idx;
 343
 344 /** @brief Winbindd response containing the passwd structs
 345  *
 346  */
 347 static struct winbindd_response pw_response;
 348
 349 /* Reset the passwd iterator */
 350 wbcErr wbcSetpwent(void)
 351 {
 352         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 353
 354         if (pw_cache_size > 0) {
 355                 pw_cache_idx = pw_cache_size = 0;
 356                 winbindd_free_response(&pw_response);
 357         }
 358
 359         ZERO_STRUCT(pw_response);
 360
 361         wbc_status = wbcRequestResponse(WINBINDD_SETPWENT,
 362                                         NULL, NULL);
 363         BAIL_ON_WBC_ERROR(wbc_status);
 364
 365  done:
 366         return wbc_status;
 367 }
 368
 369 /* Close the passwd iterator */
 370 wbcErr wbcEndpwent(void)
 371 {
 372         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 373
 374         if (pw_cache_size > 0) {
 375                 pw_cache_idx = pw_cache_size = 0;
 376                 winbindd_free_response(&pw_response);
 377         }
 378
 379         wbc_status = wbcRequestResponse(WINBINDD_ENDPWENT,
 380                                         NULL, NULL);
 381         BAIL_ON_WBC_ERROR(wbc_status);
 382
 383  done:
 384         return wbc_status;
 385 }
 386
 387 /* Return the next struct passwd* entry from the pwent iterator */
 388 wbcErr wbcGetpwent(struct passwd **pwd)
 389 {
 390         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 391         struct winbindd_request request;
 392         struct winbindd_pw *wb_pw;
 393
 394         /* If there's a cached result, return that. */
 395         if (pw_cache_idx < pw_cache_size) {
 396                 goto return_result;
 397         }
 398
 399         /* Otherwise, query winbindd for some entries. */
 400
 401         pw_cache_idx = 0;
 402
 403         winbindd_free_response(&pw_response);
 404
 405         ZERO_STRUCT(request);
 406         request.data.num_entries = MAX_GETPWENT_USERS;
 407
 408         wbc_status = wbcRequestResponse(WINBINDD_GETPWENT, &request,
 409                                         &pw_response);
 410
 411         BAIL_ON_WBC_ERROR(wbc_status);
 412
 413         pw_cache_size = pw_response.data.num_entries;
 414
 415 return_result:
 416
 417         wb_pw = (struct winbindd_pw *) pw_response.extra_data.data;
 418
 419         *pwd = copy_passwd_entry(&wb_pw[pw_cache_idx]);
 420
 421         BAIL_ON_PTR_ERROR(*pwd, wbc_status);
 422
 423         pw_cache_idx++;
 424
 425 done:
 426         return wbc_status;
 427 }
 428
 429 /** @brief Number of cached group structs
 430  *
 431  */
 432 static uint32_t gr_cache_size;
 433
 434 /** @brief Position of the grent context
 435  *
 436  */
 437 static uint32_t gr_cache_idx;
 438
 439 /** @brief Winbindd response containing the group structs
 440  *
 441  */
 442 static struct winbindd_response gr_response;
 443
 444 /* Reset the group iterator */
 445 wbcErr wbcSetgrent(void)
 446 {
 447         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 448
 449         if (gr_cache_size > 0) {
 450                 gr_cache_idx = gr_cache_size = 0;
 451                 winbindd_free_response(&gr_response);
 452         }
 453
 454         ZERO_STRUCT(gr_response);
 455
 456         wbc_status = wbcRequestResponse(WINBINDD_SETGRENT,
 457                                         NULL, NULL);
 458         BAIL_ON_WBC_ERROR(wbc_status);
 459
 460  done:
 461         return wbc_status;
 462 }
 463
 464 /* Close the group iterator */
 465 wbcErr wbcEndgrent(void)
 466 {
 467         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 468
 469         if (gr_cache_size > 0) {
 470                 gr_cache_idx = gr_cache_size = 0;
 471                 winbindd_free_response(&gr_response);
 472         }
 473
 474         wbc_status = wbcRequestResponse(WINBINDD_ENDGRENT,
 475                                         NULL, NULL);
 476         BAIL_ON_WBC_ERROR(wbc_status);
 477
 478  done:
 479         return wbc_status;
 480 }
 481
 482 /* Return the next struct group* entry from the pwent iterator */
 483 wbcErr wbcGetgrent(struct group **grp)
 484 {
 485         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 486         struct winbindd_request request;
 487         struct winbindd_gr *wb_gr;
 488         uint32_t mem_ofs;
 489
 490         /* If there's a cached result, return that. */
 491         if (gr_cache_idx < gr_cache_size) {
 492                 goto return_result;
 493         }
 494
 495         /* Otherwise, query winbindd for some entries. */
 496
 497         gr_cache_idx = 0;
 498
 499         winbindd_free_response(&gr_response);
 500
 501         ZERO_STRUCT(request);
 502         request.data.num_entries = MAX_GETGRENT_GROUPS;
 503
 504         wbc_status = wbcRequestResponse(WINBINDD_GETGRENT, &request,
 505                                         &gr_response);
 506
 507         BAIL_ON_WBC_ERROR(wbc_status);
 508
 509         gr_cache_size = gr_response.data.num_entries;
 510
 511 return_result:
 512
 513         wb_gr = (struct winbindd_gr *) gr_response.extra_data.data;
 514
 515         mem_ofs = wb_gr[gr_cache_idx].gr_mem_ofs +
 516                   gr_cache_size * sizeof(struct winbindd_gr);
 517
 518         *grp = copy_group_entry(&wb_gr[gr_cache_idx],
 519                                 ((char *)gr_response.extra_data.data)+mem_ofs);
 520
 521         BAIL_ON_PTR_ERROR(*grp, wbc_status);
 522
 523         gr_cache_idx++;
 524
 525 done:
 526         return wbc_status;
 527 }
 528
 529 /* Return the next struct group* entry from the pwent iterator */
 530 wbcErr wbcGetgrlist(struct group **grp)
 531 {
 532         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 533         struct winbindd_request request;
 534         struct winbindd_gr *wb_gr;
 535
 536         /* If there's a cached result, return that. */
 537         if (gr_cache_idx < gr_cache_size) {
 538                 goto return_result;
 539         }
 540
 541         /* Otherwise, query winbindd for some entries. */
 542
 543         gr_cache_idx = 0;
 544
 545         winbindd_free_response(&gr_response);
 546         ZERO_STRUCT(gr_response);
 547
 548         ZERO_STRUCT(request);
 549         request.data.num_entries = MAX_GETGRENT_GROUPS;
 550
 551         wbc_status = wbcRequestResponse(WINBINDD_GETGRLST, &request,
 552                                         &gr_response);
 553
 554         BAIL_ON_WBC_ERROR(wbc_status);
 555
 556         gr_cache_size = gr_response.data.num_entries;
 557
 558 return_result:
 559
 560         wb_gr = (struct winbindd_gr *) gr_response.extra_data.data;
 561
 562         *grp = copy_group_entry(&wb_gr[gr_cache_idx], NULL);
 563
 564         BAIL_ON_PTR_ERROR(*grp, wbc_status);
 565
 566         gr_cache_idx++;
 567
 568 done:
 569         return wbc_status;
 570 }
 571
 572 /* Return the unix group array belonging to the given user */
 573 wbcErr wbcGetGroups(const char *account,
 574                     uint32_t *num_groups,
 575                     gid_t **_groups)
 576 {
 577         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 578         struct winbindd_request request;
 579         struct winbindd_response response;
 580         uint32_t i;
 581         gid_t *groups = NULL;
 582
 583         /* Initialize request */
 584
 585         ZERO_STRUCT(request);
 586         ZERO_STRUCT(response);
 587
 588         if (!account) {
 589                 wbc_status = WBC_ERR_INVALID_PARAM;
 590                 BAIL_ON_WBC_ERROR(wbc_status);
 591         }
 592
 593         /* Send request */
 594
 595         strncpy(request.data.username, account, sizeof(request.data.username)-1);
 596
 597         wbc_status = wbcRequestResponse(WINBINDD_GETGROUPS,
 598                                         &request,
 599                                         &response);
 600         BAIL_ON_WBC_ERROR(wbc_status);
 601
 602         groups = (gid_t *)wbcAllocateMemory(
 603                 response.data.num_entries, sizeof(gid_t), NULL);
 604         BAIL_ON_PTR_ERROR(groups, wbc_status);
 605
 606         for (i = 0; i < response.data.num_entries; i++) {
 607                 groups[i] = ((gid_t *)response.extra_data.data)[i];
 608         }
 609
 610         *num_groups = response.data.num_entries;
 611         *_groups = groups;
 612         groups = NULL;
 613
 614         wbc_status = WBC_ERR_SUCCESS;
 615
 616  done:
 617         winbindd_free_response(&response);
 618         wbcFreeMemory(groups);
 619         return wbc_status;
 620 }