source3/printing/nt_printing_ads.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client / server routines
   4  *  Copyright (C) Andrew Tridgell              1992-2000,
   5  *  Copyright (C) Jean François Micouleau      1998-2000.
   6  *  Copyright (C) Gerald Carter                2002-2005.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 3 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program 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
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "includes.h"
  23 #include "../librpc/gen_ndr/spoolss.h"
  24 #include "rpc_server/srv_spoolss_util.h"
  25 #include "nt_printing.h"
  26 #include "ads.h"
  27 #include "secrets.h"
  28
  29 #ifdef HAVE_ADS
  30 /*****************************************************************
  31  ****************************************************************/
  32
  33 static void store_printer_guid(struct messaging_context *msg_ctx,
  34                                const char *printer, struct GUID guid)
  35 {
  36         TALLOC_CTX *tmp_ctx;
  37         struct auth_serversupplied_info *server_info = NULL;
  38         const char *guid_str;
  39         DATA_BLOB blob;
  40         NTSTATUS status;
  41         WERROR result;
  42
  43         tmp_ctx = talloc_new(NULL);
  44         if (!tmp_ctx) {
  45                 DEBUG(0, ("store_printer_guid: Out of memory?!\n"));
  46                 return;
  47         }
  48
  49         status = make_server_info_system(tmp_ctx, &server_info);
  50         if (!NT_STATUS_IS_OK(status)) {
  51                 DEBUG(0, ("store_printer_guid: "
  52                           "Could not create system server_info\n"));
  53                 goto done;
  54         }
  55
  56         guid_str = GUID_string(tmp_ctx, &guid);
  57         if (!guid_str) {
  58                 DEBUG(0, ("store_printer_guid: Out of memory?!\n"));
  59                 goto done;
  60         }
  61
  62         /* We used to store this as a REG_BINARY but that causes
  63            Vista to whine */
  64
  65         if (!push_reg_sz(tmp_ctx, &blob, guid_str)) {
  66                 DEBUG(0, ("store_printer_guid: "
  67                           "Could not marshall string %s for objectGUID\n",
  68                           guid_str));
  69                 goto done;
  70         }
  71
  72         result = winreg_set_printer_dataex(tmp_ctx, server_info, msg_ctx,
  73                                            printer,
  74                                            SPOOL_DSSPOOLER_KEY, "objectGUID",
  75                                            REG_SZ, blob.data, blob.length);
  76         if (!W_ERROR_IS_OK(result)) {
  77                 DEBUG(0, ("store_printer_guid: "
  78                           "Failed to store GUID for printer %s\n", printer));
  79         }
  80
  81 done:
  82         talloc_free(tmp_ctx);
  83 }
  84
  85 static WERROR nt_printer_publish_ads(struct messaging_context *msg_ctx,
  86                                      ADS_STRUCT *ads,
  87                                      struct spoolss_PrinterInfo2 *pinfo2)
  88 {
  89         ADS_STATUS ads_rc;
  90         LDAPMessage *res;
  91         char *prt_dn = NULL, *srv_dn, *srv_cn_0, *srv_cn_escaped, *sharename_escaped;
  92         char *srv_dn_utf8, **srv_cn_utf8;
  93         TALLOC_CTX *ctx;
  94         ADS_MODLIST mods;
  95         const char *attrs[] = {"objectGUID", NULL};
  96         struct GUID guid;
  97         WERROR win_rc = WERR_OK;
  98         size_t converted_size;
  99         const char *printer = pinfo2->sharename;
 100
 101         /* build the ads mods */
 102         ctx = talloc_init("nt_printer_publish_ads");
 103         if (ctx == NULL) {
 104                 return WERR_NOMEM;
 105         }
 106
 107         DEBUG(5, ("publishing printer %s\n", printer));
 108
 109         /* figure out where to publish */
 110         ads_find_machine_acct(ads, &res, global_myname());
 111
 112         /* We use ldap_get_dn here as we need the answer
 113          * in utf8 to call ldap_explode_dn(). JRA. */
 114
 115         srv_dn_utf8 = ldap_get_dn((LDAP *)ads->ldap.ld, (LDAPMessage *)res);
 116         if (!srv_dn_utf8) {
 117                 TALLOC_FREE(ctx);
 118                 return WERR_SERVER_UNAVAILABLE;
 119         }
 120         ads_msgfree(ads, res);
 121         srv_cn_utf8 = ldap_explode_dn(srv_dn_utf8, 1);
 122         if (!srv_cn_utf8) {
 123                 TALLOC_FREE(ctx);
 124                 ldap_memfree(srv_dn_utf8);
 125                 return WERR_SERVER_UNAVAILABLE;
 126         }
 127         /* Now convert to CH_UNIX. */
 128         if (!pull_utf8_talloc(ctx, &srv_dn, srv_dn_utf8, &converted_size)) {
 129                 TALLOC_FREE(ctx);
 130                 ldap_memfree(srv_dn_utf8);
 131                 ldap_memfree(srv_cn_utf8);
 132                 return WERR_SERVER_UNAVAILABLE;
 133         }
 134         if (!pull_utf8_talloc(ctx, &srv_cn_0, srv_cn_utf8[0], &converted_size)) {
 135                 TALLOC_FREE(ctx);
 136                 ldap_memfree(srv_dn_utf8);
 137                 ldap_memfree(srv_cn_utf8);
 138                 TALLOC_FREE(srv_dn);
 139                 return WERR_SERVER_UNAVAILABLE;
 140         }
 141
 142         ldap_memfree(srv_dn_utf8);
 143         ldap_memfree(srv_cn_utf8);
 144
 145         srv_cn_escaped = escape_rdn_val_string_alloc(srv_cn_0);
 146         if (!srv_cn_escaped) {
 147                 TALLOC_FREE(ctx);
 148                 return WERR_SERVER_UNAVAILABLE;
 149         }
 150         sharename_escaped = escape_rdn_val_string_alloc(printer);
 151         if (!sharename_escaped) {
 152                 SAFE_FREE(srv_cn_escaped);
 153                 TALLOC_FREE(ctx);
 154                 return WERR_SERVER_UNAVAILABLE;
 155         }
 156
 157         prt_dn = talloc_asprintf(ctx, "cn=%s-%s,%s", srv_cn_escaped, sharename_escaped, srv_dn);
 158
 159         SAFE_FREE(srv_cn_escaped);
 160         SAFE_FREE(sharename_escaped);
 161
 162         mods = ads_init_mods(ctx);
 163
 164         if (mods == NULL) {
 165                 SAFE_FREE(prt_dn);
 166                 TALLOC_FREE(ctx);
 167                 return WERR_NOMEM;
 168         }
 169
 170         ads_mod_str(ctx, &mods, SPOOL_REG_PRINTERNAME, printer);
 171
 172         /* publish it */
 173         ads_rc = ads_mod_printer_entry(ads, prt_dn, ctx, &mods);
 174         if (ads_rc.err.rc == LDAP_NO_SUCH_OBJECT) {
 175                 int i;
 176                 for (i=0; mods[i] != 0; i++)
 177                         ;
 178                 mods[i] = (LDAPMod *)-1;
 179                 ads_rc = ads_add_printer_entry(ads, prt_dn, ctx, &mods);
 180         }
 181
 182         if (!ADS_ERR_OK(ads_rc)) {
 183                 DEBUG(3, ("error publishing %s: %s\n",
 184                           printer, ads_errstr(ads_rc)));
 185         }
 186
 187         /* retreive the guid and store it locally */
 188         if (ADS_ERR_OK(ads_search_dn(ads, &res, prt_dn, attrs))) {
 189                 ZERO_STRUCT(guid);
 190                 ads_pull_guid(ads, res, &guid);
 191                 ads_msgfree(ads, res);
 192                 store_printer_guid(msg_ctx, printer, guid);
 193         }
 194         TALLOC_FREE(ctx);
 195
 196         return win_rc;
 197 }
 198
 199 static WERROR nt_printer_unpublish_ads(ADS_STRUCT *ads,
 200                                        const char *printer)
 201 {
 202         ADS_STATUS ads_rc;
 203         LDAPMessage *res = NULL;
 204         char *prt_dn = NULL;
 205
 206         DEBUG(5, ("unpublishing printer %s\n", printer));
 207
 208         /* remove the printer from the directory */
 209         ads_rc = ads_find_printer_on_server(ads, &res,
 210                                             printer, global_myname());
 211
 212         if (ADS_ERR_OK(ads_rc) && res && ads_count_replies(ads, res)) {
 213                 prt_dn = ads_get_dn(ads, talloc_tos(), res);
 214                 if (!prt_dn) {
 215                         ads_msgfree(ads, res);
 216                         return WERR_NOMEM;
 217                 }
 218                 ads_rc = ads_del_dn(ads, prt_dn);
 219                 TALLOC_FREE(prt_dn);
 220         }
 221
 222         if (res) {
 223                 ads_msgfree(ads, res);
 224         }
 225         return WERR_OK;
 226 }
 227
 228 /****************************************************************************
 229  * Publish a printer in the directory
 230  *
 231  * @param mem_ctx      memory context
 232  * @param server_info  server_info to access winreg pipe
 233  * @param pinfo2       printer information
 234  * @param action       publish/unpublish action
 235  * @return WERROR indicating status of publishing
 236  ***************************************************************************/
 237
 238 WERROR nt_printer_publish(TALLOC_CTX *mem_ctx,
 239                           struct auth_serversupplied_info *server_info,
 240                           struct spoolss_PrinterInfo2 *pinfo2,
 241                           int action)
 242 {
 243         uint32_t info2_mask = SPOOLSS_PRINTER_INFO_ATTRIBUTES;
 244         struct spoolss_SetPrinterInfo2 *sinfo2;
 245         ADS_STATUS ads_rc;
 246         ADS_STRUCT *ads = NULL;
 247         WERROR win_rc;
 248
 249         sinfo2 = talloc_zero(mem_ctx, struct spoolss_SetPrinterInfo2);
 250         if (!sinfo2) {
 251                 return WERR_NOMEM;
 252         }
 253
 254         switch (action) {
 255         case DSPRINT_PUBLISH:
 256         case DSPRINT_UPDATE:
 257                 pinfo2->attributes |= PRINTER_ATTRIBUTE_PUBLISHED;
 258                 break;
 259         case DSPRINT_UNPUBLISH:
 260                 pinfo2->attributes ^= PRINTER_ATTRIBUTE_PUBLISHED;
 261                 break;
 262         default:
 263                 win_rc = WERR_NOT_SUPPORTED;
 264                 goto done;
 265         }
 266
 267         sinfo2->attributes = pinfo2->attributes;
 268
 269         win_rc = winreg_update_printer(mem_ctx, server_info,
 270                                         smbd_messaging_context(),
 271                                         pinfo2->sharename, info2_mask,
 272                                         sinfo2, NULL, NULL);
 273         if (!W_ERROR_IS_OK(win_rc)) {
 274                 DEBUG(3, ("err %d saving data\n", W_ERROR_V(win_rc)));
 275                 goto done;
 276         }
 277
 278         TALLOC_FREE(sinfo2);
 279
 280         ads = ads_init(lp_realm(), lp_workgroup(), NULL);
 281         if (!ads) {
 282                 DEBUG(3, ("ads_init() failed\n"));
 283                 win_rc = WERR_SERVER_UNAVAILABLE;
 284                 goto done;
 285         }
 286         setenv(KRB5_ENV_CCNAME, "MEMORY:prtpub_cache", 1);
 287         SAFE_FREE(ads->auth.password);
 288         ads->auth.password = secrets_fetch_machine_password(lp_workgroup(),
 289                 NULL, NULL);
 290
 291         /* ads_connect() will find the DC for us */
 292         ads_rc = ads_connect(ads);
 293         if (!ADS_ERR_OK(ads_rc)) {
 294                 DEBUG(3, ("ads_connect failed: %s\n", ads_errstr(ads_rc)));
 295                 win_rc = WERR_ACCESS_DENIED;
 296                 goto done;
 297         }
 298
 299         switch (action) {
 300         case DSPRINT_PUBLISH:
 301         case DSPRINT_UPDATE:
 302                 win_rc = nt_printer_publish_ads(smbd_messaging_context(),
 303                                                 ads, pinfo2);
 304                 break;
 305         case DSPRINT_UNPUBLISH:
 306                 win_rc = nt_printer_unpublish_ads(ads, pinfo2->sharename);
 307                 break;
 308         }
 309
 310 done:
 311         ads_destroy(&ads);
 312         return win_rc;
 313 }
 314
 315 WERROR check_published_printers(void)
 316 {
 317         ADS_STATUS ads_rc;
 318         ADS_STRUCT *ads = NULL;
 319         int snum;
 320         int n_services = lp_numservices();
 321         TALLOC_CTX *tmp_ctx = NULL;
 322         struct auth_serversupplied_info *server_info = NULL;
 323         struct spoolss_PrinterInfo2 *pinfo2;
 324         NTSTATUS status;
 325         WERROR result;
 326
 327         tmp_ctx = talloc_new(NULL);
 328         if (!tmp_ctx) return WERR_NOMEM;
 329
 330         ads = ads_init(lp_realm(), lp_workgroup(), NULL);
 331         if (!ads) {
 332                 DEBUG(3, ("ads_init() failed\n"));
 333                 return WERR_SERVER_UNAVAILABLE;
 334         }
 335         setenv(KRB5_ENV_CCNAME, "MEMORY:prtpub_cache", 1);
 336         SAFE_FREE(ads->auth.password);
 337         ads->auth.password = secrets_fetch_machine_password(lp_workgroup(),
 338                 NULL, NULL);
 339
 340         /* ads_connect() will find the DC for us */
 341         ads_rc = ads_connect(ads);
 342         if (!ADS_ERR_OK(ads_rc)) {
 343                 DEBUG(3, ("ads_connect failed: %s\n", ads_errstr(ads_rc)));
 344                 result = WERR_ACCESS_DENIED;
 345                 goto done;
 346         }
 347
 348         status = make_server_info_system(tmp_ctx, &server_info);
 349         if (!NT_STATUS_IS_OK(status)) {
 350                 DEBUG(0, ("check_published_printers: "
 351                           "Could not create system server_info\n"));
 352                 result = WERR_ACCESS_DENIED;
 353                 goto done;
 354         }
 355
 356         for (snum = 0; snum < n_services; snum++) {
 357                 if (!lp_snum_ok(snum) || !lp_print_ok(snum)) {
 358                         continue;
 359                 }
 360
 361                 result = winreg_get_printer(tmp_ctx, server_info,
 362                                             smbd_messaging_context(), NULL,
 363                                             lp_servicename(snum), &pinfo2);
 364                 if (!W_ERROR_IS_OK(result)) {
 365                         continue;
 366                 }
 367
 368                 if (pinfo2->attributes & PRINTER_ATTRIBUTE_PUBLISHED) {
 369                         nt_printer_publish_ads(smbd_messaging_context(),
 370                                                ads, pinfo2);
 371                 }
 372
 373                 TALLOC_FREE(pinfo2);
 374         }
 375
 376         result = WERR_OK;
 377 done:
 378         ads_destroy(&ads);
 379         ads_kdestroy("MEMORY:prtpub_cache");
 380         talloc_free(tmp_ctx);
 381         return result;
 382 }
 383
 384 bool is_printer_published(TALLOC_CTX *mem_ctx,
 385                           struct auth_serversupplied_info *server_info,
 386                           char *servername, char *printer, struct GUID *guid,
 387                           struct spoolss_PrinterInfo2 **info2)
 388 {
 389         struct spoolss_PrinterInfo2 *pinfo2 = NULL;
 390         enum winreg_Type type;
 391         uint8_t *data;
 392         uint32_t data_size;
 393         WERROR result;
 394         NTSTATUS status;
 395
 396         result = winreg_get_printer(mem_ctx, server_info,
 397                                     smbd_messaging_context(),
 398                                     servername, printer, &pinfo2);
 399         if (!W_ERROR_IS_OK(result)) {
 400                 return false;
 401         }
 402
 403         if (!(pinfo2->attributes & PRINTER_ATTRIBUTE_PUBLISHED)) {
 404                 TALLOC_FREE(pinfo2);
 405                 return false;
 406         }
 407
 408         if (!guid) {
 409                 goto done;
 410         }
 411
 412         /* fetching printer guids really ought to be a separate function. */
 413
 414         result = winreg_get_printer_dataex(mem_ctx, server_info,
 415                                            smbd_messaging_context(), printer,
 416                                            SPOOL_DSSPOOLER_KEY, "objectGUID",
 417                                            &type, &data, &data_size);
 418         if (!W_ERROR_IS_OK(result)) {
 419                 TALLOC_FREE(pinfo2);
 420                 return false;
 421         }
 422
 423         /* We used to store the guid as REG_BINARY, then swapped
 424            to REG_SZ for Vista compatibility so check for both */
 425
 426         switch (type) {
 427         case REG_SZ:
 428                 status = GUID_from_string((char *)data, guid);
 429                 if (!NT_STATUS_IS_OK(status)) {
 430                         TALLOC_FREE(pinfo2);
 431                         return false;
 432                 }
 433                 break;
 434
 435         case REG_BINARY:
 436                 if (data_size != sizeof(struct GUID)) {
 437                         TALLOC_FREE(pinfo2);
 438                         return false;
 439                 }
 440                 memcpy(guid, data, sizeof(struct GUID));
 441                 break;
 442         default:
 443                 DEBUG(0,("is_printer_published: GUID value stored as "
 444                          "invaluid type (%d)\n", type));
 445                 break;
 446         }
 447
 448 done:
 449         if (info2) {
 450                 *info2 = talloc_move(mem_ctx, &pinfo2);
 451         }
 452         talloc_free(pinfo2);
 453         return true;
 454 }
 455 #else
 456 WERROR nt_printer_publish(TALLOC_CTX *mem_ctx,
 457                           struct auth_serversupplied_info *server_info,
 458                           struct spoolss_PrinterInfo2 *pinfo2,
 459                           int action)
 460 {
 461         return WERR_OK;
 462 }
 463
 464 WERROR check_published_printers(void)
 465 {
 466         return WERR_OK;
 467 }
 468
 469 bool is_printer_published(TALLOC_CTX *mem_ctx,
 470                           struct auth_serversupplied_info *server_info,
 471                           char *servername, char *printer, struct GUID *guid,
 472                           struct spoolss_PrinterInfo2 **info2)
 473 {
 474         return False;
 475 }
 476 #endif /* HAVE_ADS */