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         for (i=0; gr->gr_mem[i] != NULL; i++) {
 104                 free(gr->gr_mem[i]);
 105         }
 106         free(gr->gr_mem);
 107 }
 108
 109 static struct group *copy_group_entry(struct winbindd_gr *g,
 110                                       char *mem_buf)
 111 {
 112         struct group *gr = NULL;
 113         int i;
 114         char *mem_p, *mem_q;
 115
 116         gr = (struct group *)wbcAllocateMemory(
 117                 1, sizeof(struct group), wbcGroupDestructor);
 118         if (gr == NULL) {
 119                 return NULL;
 120         }
 121
 122         gr->gr_name = strdup(g->gr_name);
 123         if (gr->gr_name == NULL) {
 124                 goto fail;
 125         }
 126         gr->gr_passwd = strdup(g->gr_passwd);
 127         if (gr->gr_passwd == NULL) {
 128                 goto fail;
 129         }
 130         gr->gr_gid = g->gr_gid;
 131
 132         gr->gr_mem = (char **)calloc(g->num_gr_mem+1, sizeof(char *));
 133         if (gr->gr_mem == NULL) {
 134                 goto fail;
 135         }
 136
 137         mem_p = mem_q = mem_buf;
 138         for (i=0; i<g->num_gr_mem && mem_p; i++) {
 139                 mem_q = strchr(mem_p, ',');
 140                 if (mem_q != NULL) {
 141                         *mem_q = '\0';
 142                 }
 143
 144                 gr->gr_mem[i] = strdup(mem_p);
 145                 if (gr->gr_mem[i] == NULL) {
 146                         goto fail;
 147                 }
 148
 149                 if (mem_q == NULL) {
 150                         i += 1;
 151                         break;
 152                 }
 153                 mem_p = mem_q + 1;
 154         }
 155         gr->gr_mem[i] = NULL;
 156
 157         return gr;
 158
 159 fail:
 160         wbcFreeMemory(gr);
 161         return NULL;
 162 }
 163
 164 /* Fill in a struct passwd* for a domain user based on username */
 165 wbcErr wbcGetpwnam(const char *name, struct passwd **pwd)
 166 {
 167         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 168         struct winbindd_request request;
 169         struct winbindd_response response;
 170
 171         if (!name || !pwd) {
 172                 wbc_status = WBC_ERR_INVALID_PARAM;
 173                 BAIL_ON_WBC_ERROR(wbc_status);
 174         }
 175
 176         /* Initialize request */
 177
 178         ZERO_STRUCT(request);
 179         ZERO_STRUCT(response);
 180
 181         /* dst is already null terminated from the memset above */
 182
 183         strncpy(request.data.username, name, sizeof(request.data.username)-1);
 184
 185         wbc_status = wbcRequestResponse(WINBINDD_GETPWNAM,
 186                                         &request,
 187                                         &response);
 188         BAIL_ON_WBC_ERROR(wbc_status);
 189
 190         *pwd = copy_passwd_entry(&response.data.pw);
 191         BAIL_ON_PTR_ERROR(*pwd, wbc_status);
 192
 193  done:
 194         return wbc_status;
 195 }
 196
 197 /* Fill in a struct passwd* for a domain user based on uid */
 198 wbcErr wbcGetpwuid(uid_t uid, struct passwd **pwd)
 199 {
 200         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 201         struct winbindd_request request;
 202         struct winbindd_response response;
 203
 204         if (!pwd) {
 205                 wbc_status = WBC_ERR_INVALID_PARAM;
 206                 BAIL_ON_WBC_ERROR(wbc_status);
 207         }
 208
 209         /* Initialize request */
 210
 211         ZERO_STRUCT(request);
 212         ZERO_STRUCT(response);
 213
 214         request.data.uid = uid;
 215
 216         wbc_status = wbcRequestResponse(WINBINDD_GETPWUID,
 217                                         &request,
 218                                         &response);
 219         BAIL_ON_WBC_ERROR(wbc_status);
 220
 221         *pwd = copy_passwd_entry(&response.data.pw);
 222         BAIL_ON_PTR_ERROR(*pwd, wbc_status);
 223
 224  done:
 225         return wbc_status;
 226 }
 227
 228 /* Fill in a struct passwd* for a domain user based on sid */
 229 wbcErr wbcGetpwsid(struct wbcDomainSid *sid, struct passwd **pwd)
 230 {
 231         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 232         struct winbindd_request request;
 233         struct winbindd_response response;
 234         char * sid_string = NULL;
 235
 236         if (!pwd) {
 237                 wbc_status = WBC_ERR_INVALID_PARAM;
 238                 BAIL_ON_WBC_ERROR(wbc_status);
 239         }
 240
 241         wbc_status = wbcSidToString(sid, &sid_string);
 242         BAIL_ON_WBC_ERROR(wbc_status);
 243
 244         /* Initialize request */
 245
 246         ZERO_STRUCT(request);
 247         ZERO_STRUCT(response);
 248
 249         strncpy(request.data.sid, sid_string, sizeof(request.data.sid));
 250
 251         wbc_status = wbcRequestResponse(WINBINDD_GETPWSID,
 252                                         &request,
 253                                         &response);
 254         BAIL_ON_WBC_ERROR(wbc_status);
 255
 256         *pwd = copy_passwd_entry(&response.data.pw);
 257         BAIL_ON_PTR_ERROR(*pwd, wbc_status);
 258
 259  done:
 260         wbcFreeMemory(sid_string);
 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 = talloc_array(NULL, gid_t, response.data.num_entries);
 603         BAIL_ON_PTR_ERROR(groups, wbc_status);
 604
 605         for (i = 0; i < response.data.num_entries; i++) {
 606                 groups[i] = ((gid_t *)response.extra_data.data)[i];
 607         }
 608
 609         *num_groups = response.data.num_entries;
 610         *_groups = groups;
 611         groups = NULL;
 612
 613         wbc_status = WBC_ERR_SUCCESS;
 614
 615  done:
 616         winbindd_free_response(&response);
 617         if (groups) {
 618                 talloc_free(groups);
 619         }
 620
 621         return wbc_status;
 622 }