source3/printing/nt_printing_tdb.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  *  Copyright (c) Andreas Schneider            2010.
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 3 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program 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
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include "includes.h"
  24 #include "system/filesys.h"
  25 #include "printing/nt_printing_tdb.h"
  26 #include "librpc/gen_ndr/spoolss.h"
  27 #include "librpc/gen_ndr/ndr_security.h"
  28 #include "libcli/security/security.h"
  29 #include "util_tdb.h"
  30
  31 #define FORMS_PREFIX "FORMS/"
  32 #define DRIVERS_PREFIX "DRIVERS/"
  33 #define PRINTERS_PREFIX "PRINTERS/"
  34 #define SECDESC_PREFIX "SECDESC/"
  35
  36 #define NTDRIVERS_DATABASE_VERSION_1 1
  37 #define NTDRIVERS_DATABASE_VERSION_2 2
  38 #define NTDRIVERS_DATABASE_VERSION_3 3 /* little endian version of v2 */
  39 #define NTDRIVERS_DATABASE_VERSION_4 4 /* fix generic bits in security descriptors */
  40 #define NTDRIVERS_DATABASE_VERSION_5 5 /* normalize keys in ntprinters.tdb */
  41
  42 static TDB_CONTEXT *tdb_forms; /* used for forms files */
  43 static TDB_CONTEXT *tdb_drivers; /* used for driver files */
  44 static TDB_CONTEXT *tdb_printers; /* used for printers files */
  45
  46 /****************************************************************************
  47  generate a new TDB_DATA key for storing a printer
  48 ****************************************************************************/
  49
  50 static TDB_DATA make_printer_tdbkey(TALLOC_CTX *ctx, const char *sharename )
  51 {
  52         fstring share;
  53         char *keystr = NULL;
  54         TDB_DATA key;
  55
  56         fstrcpy(share, sharename);
  57         strlower_m(share);
  58
  59         keystr = talloc_asprintf(ctx, "%s%s", PRINTERS_PREFIX, share);
  60         key = string_term_tdb_data(keystr ? keystr : "");
  61
  62         return key;
  63 }
  64
  65 /****************************************************************************
  66  generate a new TDB_DATA key for storing a printer security descriptor
  67 ****************************************************************************/
  68
  69 static TDB_DATA make_printers_secdesc_tdbkey(TALLOC_CTX *ctx,
  70                                         const char* sharename  )
  71 {
  72         fstring share;
  73         char *keystr = NULL;
  74         TDB_DATA key;
  75
  76         fstrcpy(share, sharename );
  77         strlower_m(share);
  78
  79         keystr = talloc_asprintf(ctx, "%s%s", SECDESC_PREFIX, share);
  80         key = string_term_tdb_data(keystr ? keystr : "");
  81
  82         return key;
  83 }
  84
  85 /****************************************************************************
  86  Upgrade the tdb files to version 3
  87 ****************************************************************************/
  88
  89 static bool upgrade_to_version_3(void)
  90 {
  91         TDB_DATA kbuf, newkey, dbuf;
  92
  93         DEBUG(0,("upgrade_to_version_3: upgrading print tdb's to version 3\n"));
  94
  95         for (kbuf = tdb_firstkey(tdb_drivers); kbuf.dptr;
  96                         newkey = tdb_nextkey(tdb_drivers, kbuf), free(kbuf.dptr), kbuf=newkey) {
  97
  98                 dbuf = tdb_fetch(tdb_drivers, kbuf);
  99
 100                 if (strncmp((const char *)kbuf.dptr, FORMS_PREFIX, strlen(FORMS_PREFIX)) == 0) {
 101                         DEBUG(0,("upgrade_to_version_3:moving form\n"));
 102                         if (tdb_store(tdb_forms, kbuf, dbuf, TDB_REPLACE) != 0) {
 103                                 SAFE_FREE(dbuf.dptr);
 104                                 DEBUG(0,("upgrade_to_version_3: failed to move form. Error (%s).\n", tdb_errorstr(tdb_forms)));
 105                                 return False;
 106                         }
 107                         if (tdb_delete(tdb_drivers, kbuf) != 0) {
 108                                 SAFE_FREE(dbuf.dptr);
 109                                 DEBUG(0,("upgrade_to_version_3: failed to delete form. Error (%s)\n", tdb_errorstr(tdb_drivers)));
 110                                 return False;
 111                         }
 112                 }
 113
 114                 if (strncmp((const char *)kbuf.dptr, PRINTERS_PREFIX, strlen(PRINTERS_PREFIX)) == 0) {
 115                         DEBUG(0,("upgrade_to_version_3:moving printer\n"));
 116                         if (tdb_store(tdb_printers, kbuf, dbuf, TDB_REPLACE) != 0) {
 117                                 SAFE_FREE(dbuf.dptr);
 118                                 DEBUG(0,("upgrade_to_version_3: failed to move printer. Error (%s)\n", tdb_errorstr(tdb_printers)));
 119                                 return False;
 120                         }
 121                         if (tdb_delete(tdb_drivers, kbuf) != 0) {
 122                                 SAFE_FREE(dbuf.dptr);
 123                                 DEBUG(0,("upgrade_to_version_3: failed to delete printer. Error (%s)\n", tdb_errorstr(tdb_drivers)));
 124                                 return False;
 125                         }
 126                 }
 127
 128                 if (strncmp((const char *)kbuf.dptr, SECDESC_PREFIX, strlen(SECDESC_PREFIX)) == 0) {
 129                         DEBUG(0,("upgrade_to_version_3:moving secdesc\n"));
 130                         if (tdb_store(tdb_printers, kbuf, dbuf, TDB_REPLACE) != 0) {
 131                                 SAFE_FREE(dbuf.dptr);
 132                                 DEBUG(0,("upgrade_to_version_3: failed to move secdesc. Error (%s)\n", tdb_errorstr(tdb_printers)));
 133                                 return False;
 134                         }
 135                         if (tdb_delete(tdb_drivers, kbuf) != 0) {
 136                                 SAFE_FREE(dbuf.dptr);
 137                                 DEBUG(0,("upgrade_to_version_3: failed to delete secdesc. Error (%s)\n", tdb_errorstr(tdb_drivers)));
 138                                 return False;
 139                         }
 140                 }
 141
 142                 SAFE_FREE(dbuf.dptr);
 143         }
 144
 145         return True;
 146 }
 147
 148 /*******************************************************************
 149  Fix an issue with security descriptors.  Printer sec_desc must
 150  use more than the generic bits that were previously used
 151  in <= 3.0.14a.  They must also have a owner and group SID assigned.
 152  Otherwise, any printers than have been migrated to a Windows
 153  host using printmig.exe will not be accessible.
 154 *******************************************************************/
 155
 156 static int sec_desc_upg_fn( TDB_CONTEXT *the_tdb, TDB_DATA key,
 157                             TDB_DATA data, void *state )
 158 {
 159         NTSTATUS status;
 160         struct sec_desc_buf *sd_orig = NULL;
 161         struct sec_desc_buf *sd_new, *sd_store;
 162         struct security_descriptor *sec, *new_sec;
 163         TALLOC_CTX *ctx = state;
 164         int result, i;
 165         uint32 sd_size;
 166         size_t size_new_sec;
 167
 168         if (!data.dptr || data.dsize == 0) {
 169                 return 0;
 170         }
 171
 172         if ( strncmp((const char *) key.dptr, SECDESC_PREFIX, strlen(SECDESC_PREFIX) ) != 0 ) {
 173                 return 0;
 174         }
 175
 176         /* upgrade the security descriptor */
 177
 178         status = unmarshall_sec_desc_buf(ctx, data.dptr, data.dsize, &sd_orig);
 179         if (!NT_STATUS_IS_OK(status)) {
 180                 /* delete bad entries */
 181                 DEBUG(0,("sec_desc_upg_fn: Failed to parse original sec_desc for %si.  Deleting....\n",
 182                         (const char *)key.dptr ));
 183                 tdb_delete( tdb_printers, key );
 184                 return 0;
 185         }
 186
 187         if (!sd_orig) {
 188                 return 0;
 189         }
 190         sec = sd_orig->sd;
 191
 192         /* is this even valid? */
 193
 194         if ( !sec->dacl ) {
 195                 return 0;
 196         }
 197
 198         /* update access masks */
 199
 200         for ( i=0; i<sec->dacl->num_aces; i++ ) {
 201                 switch ( sec->dacl->aces[i].access_mask ) {
 202                         case (GENERIC_READ_ACCESS | GENERIC_WRITE_ACCESS | GENERIC_EXECUTE_ACCESS):
 203                                 sec->dacl->aces[i].access_mask = PRINTER_ACE_PRINT;
 204                                 break;
 205
 206                         case GENERIC_ALL_ACCESS:
 207                                 sec->dacl->aces[i].access_mask = PRINTER_ACE_FULL_CONTROL;
 208                                 break;
 209
 210                         case READ_CONTROL_ACCESS:
 211                                 sec->dacl->aces[i].access_mask = PRINTER_ACE_MANAGE_DOCUMENTS;
 212
 213                         default:        /* no change */
 214                                 break;
 215                 }
 216         }
 217
 218         /* create a new struct security_descriptor with the appropriate owner and group SIDs */
 219
 220         new_sec = make_sec_desc( ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
 221                                  &global_sid_Builtin_Administrators,
 222                                  &global_sid_Builtin_Administrators,
 223                                  NULL, NULL, &size_new_sec );
 224         if (!new_sec) {
 225                 return 0;
 226         }
 227         sd_new = make_sec_desc_buf( ctx, size_new_sec, new_sec );
 228         if (!sd_new) {
 229                 return 0;
 230         }
 231
 232         if ( !(sd_store = sec_desc_merge_buf( ctx, sd_new, sd_orig )) ) {
 233                 DEBUG(0,("sec_desc_upg_fn: Failed to update sec_desc for %s\n", key.dptr ));
 234                 return 0;
 235         }
 236
 237         /* store it back */
 238
 239         sd_size = ndr_size_security_descriptor(sd_store->sd, 0)
 240                 + sizeof(struct sec_desc_buf);
 241
 242         status = marshall_sec_desc_buf(ctx, sd_store, &data.dptr, &data.dsize);
 243         if (!NT_STATUS_IS_OK(status)) {
 244                 DEBUG(0,("sec_desc_upg_fn: Failed to parse new sec_desc for %s\n", key.dptr ));
 245                 return 0;
 246         }
 247
 248         result = tdb_store( tdb_printers, key, data, TDB_REPLACE );
 249
 250         /* 0 to continue and non-zero to stop traversal */
 251
 252         return (result == -1);
 253 }
 254
 255 /*******************************************************************
 256  Upgrade the tdb files to version 4
 257 *******************************************************************/
 258
 259 static bool upgrade_to_version_4(void)
 260 {
 261         TALLOC_CTX *ctx;
 262         int result;
 263
 264         DEBUG(0,("upgrade_to_version_4: upgrading printer security descriptors\n"));
 265
 266         if ( !(ctx = talloc_init( "upgrade_to_version_4" )) )
 267                 return False;
 268
 269         result = tdb_traverse( tdb_printers, sec_desc_upg_fn, ctx );
 270
 271         talloc_destroy( ctx );
 272
 273         return ( result != -1 );
 274 }
 275
 276 /*******************************************************************
 277  Fix an issue with security descriptors.  Printer sec_desc must
 278  use more than the generic bits that were previously used
 279  in <= 3.0.14a.  They must also have a owner and group SID assigned.
 280  Otherwise, any printers than have been migrated to a Windows
 281  host using printmig.exe will not be accessible.
 282 *******************************************************************/
 283
 284 static int normalize_printers_fn( TDB_CONTEXT *the_tdb, TDB_DATA key,
 285                                   TDB_DATA data, void *state )
 286 {
 287         TALLOC_CTX *ctx = talloc_tos();
 288         TDB_DATA new_key;
 289
 290         if (!data.dptr || data.dsize == 0)
 291                 return 0;
 292
 293         /* upgrade printer records and security descriptors */
 294
 295         if ( strncmp((const char *) key.dptr, PRINTERS_PREFIX, strlen(PRINTERS_PREFIX) ) == 0 ) {
 296                 new_key = make_printer_tdbkey(ctx, (const char *)key.dptr+strlen(PRINTERS_PREFIX) );
 297         }
 298         else if ( strncmp((const char *) key.dptr, SECDESC_PREFIX, strlen(SECDESC_PREFIX) ) == 0 ) {
 299                 new_key = make_printers_secdesc_tdbkey(ctx, (const char *)key.dptr+strlen(SECDESC_PREFIX) );
 300         }
 301         else {
 302                 /* ignore this record */
 303                 return 0;
 304         }
 305
 306         /* delete the original record and store under the normalized key */
 307
 308         if ( tdb_delete( the_tdb, key ) != 0 ) {
 309                 DEBUG(0,("normalize_printers_fn: tdb_delete for [%s] failed!\n",
 310                         key.dptr));
 311                 return 1;
 312         }
 313
 314         if ( tdb_store( the_tdb, new_key, data, TDB_REPLACE) != 0 ) {
 315                 DEBUG(0,("normalize_printers_fn: failed to store new record for [%s]!\n",
 316                         key.dptr));
 317                 return 1;
 318         }
 319
 320         return 0;
 321 }
 322
 323 /*******************************************************************
 324  Upgrade the tdb files to version 5
 325 *******************************************************************/
 326
 327 static bool upgrade_to_version_5(void)
 328 {
 329         TALLOC_CTX *ctx;
 330         int result;
 331
 332         DEBUG(0,("upgrade_to_version_5: normalizing printer keys\n"));
 333
 334         if ( !(ctx = talloc_init( "upgrade_to_version_5" )) )
 335                 return False;
 336
 337         result = tdb_traverse( tdb_printers, normalize_printers_fn, NULL );
 338
 339         talloc_destroy( ctx );
 340
 341         return ( result != -1 );
 342 }
 343
 344 bool nt_printing_tdb_upgrade(void)
 345 {
 346         const char *drivers_path = state_path("ntdrivers.tdb");
 347         const char *printers_path = state_path("ntprinters.tdb");
 348         const char *forms_path = state_path("ntforms.tdb");
 349         bool drivers_exists = file_exist(drivers_path);
 350         bool printers_exists = file_exist(printers_path);
 351         bool forms_exists = file_exist(forms_path);
 352         const char *vstring = "INFO/version";
 353         int32_t vers_id;
 354
 355         if (!drivers_exists && !printers_exists && !forms_exists) {
 356                 return true;
 357         }
 358
 359         tdb_drivers = tdb_open_log(drivers_path,
 360                                    0,
 361                                    TDB_DEFAULT,
 362                                    O_RDWR|O_CREAT,
 363                                    0600);
 364         if (tdb_drivers == NULL) {
 365                 DEBUG(0,("nt_printing_init: Failed to open nt drivers "
 366                          "database %s (%s)\n",
 367                          drivers_path, strerror(errno)));
 368                 return false;
 369         }
 370
 371         tdb_printers = tdb_open_log(printers_path,
 372                                     0,
 373                                     TDB_DEFAULT,
 374                                     O_RDWR|O_CREAT,
 375                                     0600);
 376         if (tdb_printers == NULL) {
 377                 DEBUG(0,("nt_printing_init: Failed to open nt printers "
 378                          "database %s (%s)\n",
 379                          printers_path, strerror(errno)));
 380                 return false;
 381         }
 382
 383         tdb_forms = tdb_open_log(forms_path,
 384                                  0,
 385                                  TDB_DEFAULT,
 386                                  O_RDWR|O_CREAT,
 387                                  0600);
 388         if (tdb_forms == NULL) {
 389                 DEBUG(0,("nt_printing_init: Failed to open nt forms "
 390                          "database %s (%s)\n",
 391                          forms_path, strerror(errno)));
 392                 return false;
 393         }
 394
 395         /* Samba upgrade */
 396         vers_id = tdb_fetch_int32(tdb_drivers, vstring);
 397         if (vers_id == -1) {
 398                 DEBUG(10, ("Fresh database\n"));
 399                 tdb_store_int32(tdb_drivers, vstring, NTDRIVERS_DATABASE_VERSION_5);
 400                 vers_id = NTDRIVERS_DATABASE_VERSION_5;
 401         }
 402
 403         if (vers_id != NTDRIVERS_DATABASE_VERSION_5) {
 404                 if ((vers_id == NTDRIVERS_DATABASE_VERSION_1) ||
 405                     (IREV(vers_id) == NTDRIVERS_DATABASE_VERSION_1)) {
 406                         if (!upgrade_to_version_3()) {
 407                                 return false;
 408                         }
 409
 410                         tdb_store_int32(tdb_drivers, vstring, NTDRIVERS_DATABASE_VERSION_3);
 411                         vers_id = NTDRIVERS_DATABASE_VERSION_3;
 412                 }
 413
 414                 if ((vers_id == NTDRIVERS_DATABASE_VERSION_2) ||
 415                     (IREV(vers_id) == NTDRIVERS_DATABASE_VERSION_2)) {
 416                         /*
 417                          * Written on a bigendian machine with old fetch_int
 418                          * code. Save as le. The only upgrade between V2 and V3
 419                          * is to save the version in little-endian.
 420                          */
 421                         tdb_store_int32(tdb_drivers, vstring, NTDRIVERS_DATABASE_VERSION_3);
 422                         vers_id = NTDRIVERS_DATABASE_VERSION_3;
 423                 }
 424
 425                 if (vers_id == NTDRIVERS_DATABASE_VERSION_3) {
 426                         if (!upgrade_to_version_4()) {
 427                                 return false;
 428                         }
 429                         tdb_store_int32(tdb_drivers, vstring, NTDRIVERS_DATABASE_VERSION_4);
 430                         vers_id = NTDRIVERS_DATABASE_VERSION_4;
 431                 }
 432
 433                 if (vers_id == NTDRIVERS_DATABASE_VERSION_4 ) {
 434                         if (!upgrade_to_version_5()) {
 435                                 return false;
 436                         }
 437                         tdb_store_int32(tdb_drivers, vstring, NTDRIVERS_DATABASE_VERSION_5);
 438                         vers_id = NTDRIVERS_DATABASE_VERSION_5;
 439                 }
 440
 441                 if (vers_id != NTDRIVERS_DATABASE_VERSION_5) {
 442                         DEBUG(0,("nt_printing_init: Unknown printer database version [%d]\n", vers_id));
 443                         return false;
 444                 }
 445         }
 446
 447         if (tdb_drivers) {
 448                 tdb_close(tdb_drivers);
 449                 tdb_drivers = NULL;
 450         }
 451
 452         if (tdb_printers) {
 453                 tdb_close(tdb_printers);
 454                 tdb_printers = NULL;
 455         }
 456
 457         if (tdb_forms) {
 458                 tdb_close(tdb_forms);
 459                 tdb_forms = NULL;
 460         }
 461
 462         return true;
 463 }