nsswitch/libwbclient/wbc_idmap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind client API
   5
   6    Copyright (C) Gerald (Jerry) Carter 2007
   7
   8    This library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU Lesser General Public
  10    License as published by the Free Software Foundation; either
  11    version 3 of the License, or (at your option) any later version.
  12
  13    This library is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    Library General Public License for more details.
  17
  18    You should have received a copy of the GNU Lesser General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 /* Required Headers */
  23
  24 #include "replace.h"
  25 #include "libwbclient.h"
  26 #include "../winbind_client.h"
  27
  28 /* Convert a Windows SID to a Unix uid, allocating an uid if needed */
  29 wbcErr wbcCtxSidToUid(struct wbcContext *ctx, const struct wbcDomainSid *sid,
  30                       uid_t *puid)
  31 {
  32         struct wbcUnixId xid;
  33         wbcErr wbc_status;
  34
  35         if (!sid || !puid) {
  36                 wbc_status = WBC_ERR_INVALID_PARAM;
  37                 BAIL_ON_WBC_ERROR(wbc_status);
  38         }
  39
  40         wbc_status = wbcCtxSidsToUnixIds(ctx, sid, 1, &xid);
  41         if (!WBC_ERROR_IS_OK(wbc_status)) {
  42                 goto done;
  43         }
  44
  45         if ((xid.type == WBC_ID_TYPE_UID) || (xid.type == WBC_ID_TYPE_BOTH)) {
  46                 *puid = xid.id.uid;
  47                 wbc_status = WBC_ERR_SUCCESS;
  48         } else {
  49                 wbc_status = WBC_ERR_DOMAIN_NOT_FOUND;
  50         }
  51
  52  done:
  53         return wbc_status;
  54 }
  55
  56 wbcErr wbcSidToUid(const struct wbcDomainSid *sid, uid_t *puid)
  57 {
  58         return wbcCtxSidToUid(NULL, sid, puid);
  59 }
  60
  61 /* Convert a Windows SID to a Unix uid if there already is a mapping */
  62 wbcErr wbcQuerySidToUid(const struct wbcDomainSid *sid,
  63                         uid_t *puid)
  64 {
  65         return WBC_ERR_NOT_IMPLEMENTED;
  66 }
  67
  68 /* Convert a Unix uid to a Windows SID, allocating a SID if needed */
  69 wbcErr wbcCtxUidToSid(struct wbcContext *ctx, uid_t uid,
  70                       struct wbcDomainSid *psid)
  71 {
  72         struct wbcUnixId xid;
  73         struct wbcDomainSid sid;
  74         struct wbcDomainSid null_sid = { 0 };
  75         wbcErr wbc_status;
  76
  77         if (!psid) {
  78                 wbc_status = WBC_ERR_INVALID_PARAM;
  79                 BAIL_ON_WBC_ERROR(wbc_status);
  80         }
  81
  82         xid = (struct wbcUnixId) { .type = WBC_ID_TYPE_UID, .id.uid = uid };
  83
  84         wbc_status = wbcCtxUnixIdsToSids(ctx, &xid, 1, &sid);
  85         if (!WBC_ERROR_IS_OK(wbc_status)) {
  86                 goto done;
  87         }
  88
  89         if (memcmp(&sid, &null_sid, sizeof(sid)) != 0) {
  90                 *psid = sid;
  91         } else {
  92                 wbc_status = WBC_ERR_DOMAIN_NOT_FOUND;
  93         }
  94
  95 done:
  96         return wbc_status;
  97 }
  98
  99 wbcErr wbcUidToSid(uid_t uid, struct wbcDomainSid *sid)
 100 {
 101         return wbcCtxUidToSid(NULL, uid, sid);
 102 }
 103
 104 /* Convert a Unix uid to a Windows SID if there already is a mapping */
 105 wbcErr wbcQueryUidToSid(uid_t uid,
 106                         struct wbcDomainSid *sid)
 107 {
 108         return WBC_ERR_NOT_IMPLEMENTED;
 109 }
 110
 111 /** @brief Convert a Windows SID to a Unix gid, allocating a gid if needed
 112  *
 113  * @param *sid        Pointer to the domain SID to be resolved
 114  * @param *pgid       Pointer to the resolved gid_t value
 115  *
 116  * @return #wbcErr
 117  *
 118  **/
 119
 120 wbcErr wbcCtxSidToGid(struct wbcContext *ctx, const struct wbcDomainSid *sid,
 121                       gid_t *pgid)
 122 {
 123         struct wbcUnixId xid;
 124         wbcErr wbc_status;
 125
 126         if (!sid || !pgid) {
 127                 wbc_status = WBC_ERR_INVALID_PARAM;
 128                 BAIL_ON_WBC_ERROR(wbc_status);
 129         }
 130
 131         wbc_status = wbcCtxSidsToUnixIds(ctx, sid, 1, &xid);
 132         if (!WBC_ERROR_IS_OK(wbc_status)) {
 133                 goto done;
 134         }
 135
 136         if ((xid.type == WBC_ID_TYPE_GID) || (xid.type == WBC_ID_TYPE_BOTH)) {
 137                 *pgid = xid.id.gid;
 138                 wbc_status = WBC_ERR_SUCCESS;
 139         } else {
 140                 wbc_status = WBC_ERR_DOMAIN_NOT_FOUND;
 141         }
 142
 143  done:
 144         return wbc_status;
 145 }
 146
 147 wbcErr wbcSidToGid(const struct wbcDomainSid *sid, gid_t *pgid)
 148 {
 149         return wbcCtxSidToGid(NULL, sid, pgid);
 150 }
 151
 152 /* Convert a Windows SID to a Unix gid if there already is a mapping */
 153
 154 wbcErr wbcQuerySidToGid(const struct wbcDomainSid *sid,
 155                         gid_t *pgid)
 156 {
 157         return WBC_ERR_NOT_IMPLEMENTED;
 158 }
 159
 160
 161 /* Convert a Unix gid to a Windows SID, allocating a SID if needed */
 162 wbcErr wbcCtxGidToSid(struct wbcContext *ctx, gid_t gid,
 163                       struct wbcDomainSid *psid)
 164 {
 165         struct wbcUnixId xid;
 166         struct wbcDomainSid sid;
 167         struct wbcDomainSid null_sid = { 0 };
 168         wbcErr wbc_status;
 169
 170         if (!psid) {
 171                 wbc_status = WBC_ERR_INVALID_PARAM;
 172                 BAIL_ON_WBC_ERROR(wbc_status);
 173         }
 174
 175         xid = (struct wbcUnixId) { .type = WBC_ID_TYPE_GID, .id.gid = gid };
 176
 177         wbc_status = wbcCtxUnixIdsToSids(ctx, &xid, 1, &sid);
 178         if (!WBC_ERROR_IS_OK(wbc_status)) {
 179                 goto done;
 180         }
 181
 182         if (memcmp(&sid, &null_sid, sizeof(sid)) != 0) {
 183                 *psid = sid;
 184         } else {
 185                 wbc_status = WBC_ERR_DOMAIN_NOT_FOUND;
 186         }
 187
 188 done:
 189         return wbc_status;
 190 }
 191
 192 wbcErr wbcGidToSid(gid_t gid, struct wbcDomainSid *sid)
 193 {
 194         return wbcCtxGidToSid(NULL, gid, sid);
 195 }
 196
 197 /* Convert a Unix gid to a Windows SID if there already is a mapping */
 198 wbcErr wbcQueryGidToSid(gid_t gid,
 199                         struct wbcDomainSid *sid)
 200 {
 201         return WBC_ERR_NOT_IMPLEMENTED;
 202 }
 203
 204 /* Obtain a new uid from Winbind */
 205 wbcErr wbcCtxAllocateUid(struct wbcContext *ctx, uid_t *puid)
 206 {
 207         struct winbindd_request request;
 208         struct winbindd_response response;
 209         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 210
 211         if (!puid)
 212                 return WBC_ERR_INVALID_PARAM;
 213
 214         /* Initialise request */
 215
 216         ZERO_STRUCT(request);
 217         ZERO_STRUCT(response);
 218
 219         /* Make request */
 220
 221         wbc_status = wbcRequestResponsePriv(ctx, WINBINDD_ALLOCATE_UID,
 222                                             &request, &response);
 223         BAIL_ON_WBC_ERROR(wbc_status);
 224
 225         /* Copy out result */
 226         *puid = response.data.uid;
 227
 228         wbc_status = WBC_ERR_SUCCESS;
 229
 230  done:
 231         return wbc_status;
 232 }
 233
 234 wbcErr wbcAllocateUid(uid_t *puid)
 235 {
 236         return wbcCtxAllocateUid(NULL, puid);
 237 }
 238
 239 /* Obtain a new gid from Winbind */
 240 wbcErr wbcCtxAllocateGid(struct wbcContext *ctx, gid_t *pgid)
 241 {
 242         struct winbindd_request request;
 243         struct winbindd_response response;
 244         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 245
 246         if (!pgid)
 247                 return WBC_ERR_INVALID_PARAM;
 248
 249         /* Initialise request */
 250
 251         ZERO_STRUCT(request);
 252         ZERO_STRUCT(response);
 253
 254         /* Make request */
 255
 256         wbc_status = wbcRequestResponsePriv(ctx, WINBINDD_ALLOCATE_GID,
 257                                             &request, &response);
 258         BAIL_ON_WBC_ERROR(wbc_status);
 259
 260         /* Copy out result */
 261         *pgid = response.data.gid;
 262
 263         wbc_status = WBC_ERR_SUCCESS;
 264
 265  done:
 266         return wbc_status;
 267 }
 268
 269 wbcErr wbcAllocateGid(gid_t *pgid)
 270 {
 271         return wbcCtxAllocateGid(NULL, pgid);
 272 }
 273
 274 /* we can't include smb.h here... */
 275 #define _ID_TYPE_UID 1
 276 #define _ID_TYPE_GID 2
 277
 278 /* Set an user id mapping - not implemented any more */
 279 wbcErr wbcSetUidMapping(uid_t uid, const struct wbcDomainSid *sid)
 280 {
 281         return WBC_ERR_NOT_IMPLEMENTED;
 282 }
 283
 284 /* Set a group id mapping - not implemented any more */
 285 wbcErr wbcSetGidMapping(gid_t gid, const struct wbcDomainSid *sid)
 286 {
 287         return WBC_ERR_NOT_IMPLEMENTED;
 288 }
 289
 290 /* Remove a user id mapping - not implemented any more */
 291 wbcErr wbcRemoveUidMapping(uid_t uid, const struct wbcDomainSid *sid)
 292 {
 293         return WBC_ERR_NOT_IMPLEMENTED;
 294 }
 295
 296 /* Remove a group id mapping - not implemented any more */
 297 wbcErr wbcRemoveGidMapping(gid_t gid, const struct wbcDomainSid *sid)
 298 {
 299         return WBC_ERR_NOT_IMPLEMENTED;
 300 }
 301
 302 /* Set the highwater mark for allocated uids - not implemented any more */
 303 wbcErr wbcSetUidHwm(uid_t uid_hwm)
 304 {
 305         return WBC_ERR_NOT_IMPLEMENTED;
 306 }
 307
 308 /* Set the highwater mark for allocated gids - not implemented any more */
 309 wbcErr wbcSetGidHwm(gid_t gid_hwm)
 310 {
 311         return WBC_ERR_NOT_IMPLEMENTED;
 312 }
 313
 314 /* Convert a list of SIDs */
 315 wbcErr wbcCtxSidsToUnixIds(struct wbcContext *ctx,
 316                            const struct wbcDomainSid *sids,
 317                            uint32_t num_sids, struct wbcUnixId *ids)
 318 {
 319         struct winbindd_request request;
 320         struct winbindd_response response;
 321         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 322         int buflen, extra_len;
 323         uint32_t i;
 324         char *sidlist, *p, *extra_data;
 325
 326         buflen = num_sids * (WBC_SID_STRING_BUFLEN + 1) + 1;
 327
 328         sidlist = (char *)malloc(buflen);
 329         if (sidlist == NULL) {
 330                 return WBC_ERR_NO_MEMORY;
 331         }
 332
 333         p = sidlist;
 334
 335         for (i=0; i<num_sids; i++) {
 336                 int remaining;
 337                 int len;
 338
 339                 remaining = buflen - (p - sidlist);
 340
 341                 len = wbcSidToStringBuf(&sids[i], p, remaining);
 342                 if (len > remaining) {
 343                         free(sidlist);
 344                         return WBC_ERR_UNKNOWN_FAILURE;
 345                 }
 346
 347                 p += len;
 348                 *p++ = '\n';
 349         }
 350         *p++ = '\0';
 351
 352         ZERO_STRUCT(request);
 353         ZERO_STRUCT(response);
 354
 355         request.extra_data.data = sidlist;
 356         request.extra_len = p - sidlist;
 357
 358         wbc_status = wbcRequestResponse(ctx, WINBINDD_SIDS_TO_XIDS,
 359                                         &request, &response);
 360         free(sidlist);
 361         if (!WBC_ERROR_IS_OK(wbc_status)) {
 362                 return wbc_status;
 363         }
 364
 365         extra_len = response.length - sizeof(struct winbindd_response);
 366         extra_data = (char *)response.extra_data.data;
 367
 368         if ((extra_len <= 0) || (extra_data[extra_len-1] != '\0')) {
 369                 goto wbc_err_invalid;
 370         }
 371
 372         p = extra_data;
 373
 374         for (i=0; i<num_sids; i++) {
 375                 struct wbcUnixId *id = &ids[i];
 376                 char *q;
 377
 378                 switch (p[0]) {
 379                 case 'U':
 380                         id->type = WBC_ID_TYPE_UID;
 381                         id->id.uid = strtoul(p+1, &q, 10);
 382                         break;
 383                 case 'G':
 384                         id->type = WBC_ID_TYPE_GID;
 385                         id->id.gid = strtoul(p+1, &q, 10);
 386                         break;
 387                 case 'B':
 388                         id->type = WBC_ID_TYPE_BOTH;
 389                         id->id.uid = strtoul(p+1, &q, 10);
 390                         break;
 391                 default:
 392                         id->type = WBC_ID_TYPE_NOT_SPECIFIED;
 393                         q = strchr(p, '\n');
 394                         break;
 395                 };
 396                 if (q == NULL || q[0] != '\n') {
 397                         goto wbc_err_invalid;
 398                 }
 399                 p = q+1;
 400         }
 401         wbc_status = WBC_ERR_SUCCESS;
 402         goto done;
 403
 404 wbc_err_invalid:
 405         wbc_status = WBC_ERR_INVALID_RESPONSE;
 406 done:
 407         winbindd_free_response(&response);
 408         return wbc_status;
 409 }
 410
 411 wbcErr wbcSidsToUnixIds(const struct wbcDomainSid *sids, uint32_t num_sids,
 412                         struct wbcUnixId *ids)
 413 {
 414         return wbcCtxSidsToUnixIds(NULL, sids, num_sids, ids);
 415 }
 416
 417 wbcErr wbcCtxUnixIdsToSids(struct wbcContext *ctx,
 418                            const struct wbcUnixId *ids, uint32_t num_ids,
 419                            struct wbcDomainSid *sids)
 420 {
 421         struct winbindd_request request;
 422         struct winbindd_response response;
 423         wbcErr wbc_status;
 424         char *buf;
 425         char *s;
 426         size_t ofs, buflen;
 427         uint32_t i;
 428
 429         buflen = num_ids * (1 /* U/G */ + 10 /* 2^32 */ + 1 /* \n */) + 1;
 430         buf = malloc(buflen);
 431         if (buf == NULL) {
 432                 return WBC_ERR_NO_MEMORY;
 433         }
 434
 435         ofs = 0;
 436
 437         for (i=0; i<num_ids; i++) {
 438                 const struct wbcUnixId *id = &ids[i];
 439                 int len;
 440
 441                 switch (id->type) {
 442                 case WBC_ID_TYPE_UID:
 443                         len = snprintf(buf+ofs, buflen-ofs, "U%"PRIu32"\n",
 444                                        (uint32_t)id->id.uid);
 445                         break;
 446                 case WBC_ID_TYPE_GID:
 447                         len = snprintf(buf+ofs, buflen-ofs, "G%"PRIu32"\n",
 448                                        (uint32_t)id->id.gid);
 449                         break;
 450                 default:
 451                         free(buf);
 452                         return WBC_ERR_INVALID_PARAM;
 453                 }
 454
 455                 if (len + ofs >= buflen) { /* >= for the terminating '\0' */
 456                         free(buf);
 457                         return WBC_ERR_UNKNOWN_FAILURE;
 458                 }
 459                 ofs += len;
 460         }
 461
 462         request = (struct winbindd_request) {
 463                 .extra_data.data = buf, .extra_len = ofs+1
 464         };
 465         response = (struct winbindd_response) {0};
 466
 467         wbc_status = wbcRequestResponse(ctx, WINBINDD_XIDS_TO_SIDS,
 468                                         &request, &response);
 469         free(buf);
 470         if (!WBC_ERROR_IS_OK(wbc_status)) {
 471                 return wbc_status;
 472         }
 473
 474         s = response.extra_data.data;
 475         for (i=0; i<num_ids; i++) {
 476                 char *n = strchr(s, '\n');
 477
 478                 if (n == NULL) {
 479                         goto fail;
 480                 }
 481                 *n = '\0';
 482
 483                 wbc_status = wbcStringToSid(s, &sids[i]);
 484                 if (!WBC_ERROR_IS_OK(wbc_status)) {
 485                         sids[i] = (struct wbcDomainSid) {0};
 486                 }
 487                 s = n+1;
 488         }
 489
 490         wbc_status = WBC_ERR_SUCCESS;
 491 fail:
 492         winbindd_free_response(&response);
 493         return wbc_status;
 494 }
 495
 496 wbcErr wbcUnixIdsToSids(const struct wbcUnixId *ids, uint32_t num_ids,
 497                         struct wbcDomainSid *sids)
 498 {
 499         return wbcCtxUnixIdsToSids(NULL, ids, num_ids, sids);
 500 }