source3/utils/net_cache.c

   1 /*
   2    Samba Unix/Linux SMB client library
   3    Distributed SMB/CIFS Server Management Utility
   4    Copyright (C) Rafal Szczesniak    2002
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "net.h"
  22 #include "libsmb/samlogon_cache.h"
  23 #include "../librpc/gen_ndr/netlogon.h"
  24 #include "../librpc/gen_ndr/ndr_netlogon.h"
  25 #include "libcli/security/dom_sid.h"
  26
  27 /**
  28  * @file net_cache.c
  29  * @brief This is part of the net tool which is basically command
  30  *        line wrapper for gencache.c functions (mainly for testing)
  31  *
  32  **/
  33
  34
  35 /*
  36  * These routines are used via gencache_iterate() to display the cache's contents
  37  * (print_cache_entry) and to flush it (delete_cache_entry).
  38  * Both of them are defined by first arg of gencache_iterate() routine.
  39  */
  40 static void print_cache_entry(const char* keystr, DATA_BLOB value,
  41                               const time_t timeout, void* dptr)
  42 {
  43         char *timeout_str;
  44         char *alloc_str = NULL;
  45         const char *datastr;
  46         char *datastr_free = NULL;
  47         time_t now_t = time(NULL);
  48         struct tm timeout_tm, now_tm;
  49         struct tm *ptimeout_tm, *pnow_tm;
  50
  51         ptimeout_tm = localtime_r(&timeout, &timeout_tm);
  52         if (ptimeout_tm == NULL) {
  53                 return;
  54         }
  55         pnow_tm = localtime_r(&now_t, &now_tm);
  56         if (pnow_tm == NULL) {
  57                 return;
  58         }
  59
  60         /* form up timeout string depending whether it's today's date or not */
  61         if (timeout_tm.tm_year != now_tm.tm_year ||
  62                         timeout_tm.tm_mon != now_tm.tm_mon ||
  63                         timeout_tm.tm_mday != now_tm.tm_mday) {
  64
  65                 timeout_str = asctime(&timeout_tm);
  66                 if (!timeout_str) {
  67                         return;
  68                 }
  69                 timeout_str[strlen(timeout_str) - 1] = '\0';    /* remove tailing CR */
  70         } else {
  71                 if (asprintf(&alloc_str, "%.2d:%.2d:%.2d", timeout_tm.tm_hour,
  72                          timeout_tm.tm_min, timeout_tm.tm_sec) == -1) {
  73                         return;
  74                 }
  75                 timeout_str = alloc_str;
  76         }
  77
  78         datastr = (char *)value.data;
  79
  80         if ((value.length > 0) && (value.data[value.length-1] != '\0')) {
  81                 datastr_free = talloc_asprintf(
  82                         talloc_tos(), "<binary length %d>",
  83                         (int)value.length);
  84                 datastr = datastr_free;
  85                 if (datastr == NULL) {
  86                         datastr = "<binary>";
  87                 }
  88         }
  89
  90         d_printf(_("Key: %s\t Timeout: %s\t Value: %s  %s\n"), keystr,
  91                  timeout_str, datastr, timeout > now_t ? "": _("(expired)"));
  92
  93         SAFE_FREE(alloc_str);
  94 }
  95
  96 static void delete_cache_entry(const char* keystr, const char* datastr,
  97                                const time_t timeout, void* dptr)
  98 {
  99         if (!gencache_del(keystr))
 100                 d_fprintf(stderr, _("Couldn't delete entry! key = %s\n"),
 101                           keystr);
 102 }
 103
 104
 105 /**
 106  * Parse text representation of timeout value
 107  *
 108  * @param timeout_str string containing text representation of the timeout
 109  * @return numeric timeout of time_t type
 110  **/
 111 static time_t parse_timeout(const char* timeout_str)
 112 {
 113         char sign = '\0', *number = NULL, unit = '\0';
 114         int len, number_begin, number_end;
 115         time_t timeout;
 116
 117         /* sign detection */
 118         if (timeout_str[0] == '!' || timeout_str[0] == '+') {
 119                 sign = timeout_str[0];
 120                 number_begin = 1;
 121         } else {
 122                 number_begin = 0;
 123         }
 124
 125         /* unit detection */
 126         len = strlen(timeout_str);
 127         switch (timeout_str[len - 1]) {
 128         case 's':
 129         case 'm':
 130         case 'h':
 131         case 'd':
 132         case 'w': unit = timeout_str[len - 1];
 133         }
 134
 135         /* number detection */
 136         len = (sign) ? strlen(&timeout_str[number_begin]) : len;
 137         number_end = (unit) ? len - 1 : len;
 138         number = SMB_STRNDUP(&timeout_str[number_begin], number_end);
 139
 140         /* calculate actual timeout value */
 141         timeout = (time_t)atoi(number);
 142
 143         switch (unit) {
 144         case 'm': timeout *= 60; break;
 145         case 'h': timeout *= 60*60; break;
 146         case 'd': timeout *= 60*60*24; break;
 147         case 'w': timeout *= 60*60*24*7; break;  /* that's fair enough, I think :) */
 148         }
 149
 150         switch (sign) {
 151         case '!': timeout = time(NULL) - timeout; break;
 152         case '+':
 153         default:  timeout += time(NULL); break;
 154         }
 155
 156         if (number) SAFE_FREE(number);
 157         return timeout;
 158 }
 159
 160
 161 /**
 162  * Add an entry to the cache. If it does exist, then set it.
 163  *
 164  * @param c     A net_context structure
 165  * @param argv key, value and timeout are passed in command line
 166  * @return 0 on success, otherwise failure
 167  **/
 168 static int net_cache_add(struct net_context *c, int argc, const char **argv)
 169 {
 170         const char *keystr, *datastr, *timeout_str;
 171         time_t timeout;
 172
 173         if (argc < 3 || c->display_usage) {
 174                 d_printf("%s\n%s",
 175                          _("Usage:"),
 176                          _("net cache add <key string> <data string> "
 177                            "<timeout>\n"));
 178                 return -1;
 179         }
 180
 181         keystr = argv[0];
 182         datastr = argv[1];
 183         timeout_str = argv[2];
 184
 185         /* parse timeout given in command line */
 186         timeout = parse_timeout(timeout_str);
 187         if (!timeout) {
 188                 d_fprintf(stderr, _("Invalid timeout argument.\n"));
 189                 return -1;
 190         }
 191
 192         if (gencache_set(keystr, datastr, timeout)) {
 193                 d_printf(_("New cache entry stored successfully.\n"));
 194                 return 0;
 195         }
 196
 197         d_fprintf(stderr, _("Entry couldn't be added. Perhaps there's already such a key.\n"));
 198         return -1;
 199 }
 200
 201 /**
 202  * Delete an entry in the cache
 203  *
 204  * @param c     A net_context structure
 205  * @param argv key to delete an entry of
 206  * @return 0 on success, otherwise failure
 207  **/
 208 static int net_cache_del(struct net_context *c, int argc, const char **argv)
 209 {
 210         const char *keystr = argv[0];
 211
 212         if (argc < 1 || c->display_usage) {
 213                 d_printf("%s\n%s",
 214                          _("Usage:"),
 215                          _(" net cache del <key string>\n"));
 216                 return -1;
 217         }
 218
 219         if(gencache_del(keystr)) {
 220                 d_printf(_("Entry deleted.\n"));
 221                 return 0;
 222         }
 223
 224         d_fprintf(stderr, _("Couldn't delete specified entry\n"));
 225         return -1;
 226 }
 227
 228
 229 /**
 230  * Get and display an entry from the cache
 231  *
 232  * @param c     A net_context structure
 233  * @param argv key to search an entry of
 234  * @return 0 on success, otherwise failure
 235  **/
 236 static int net_cache_get(struct net_context *c, int argc, const char **argv)
 237 {
 238         const char* keystr = argv[0];
 239         DATA_BLOB value;
 240         time_t timeout;
 241
 242         if (argc < 1 || c->display_usage) {
 243                 d_printf("%s\n%s",
 244                          _("Usage:"),
 245                          _(" net cache get <key>\n"));
 246                 return -1;
 247         }
 248
 249         if (gencache_get_data_blob(keystr, NULL, &value, &timeout, NULL)) {
 250                 print_cache_entry(keystr, value, timeout, NULL);
 251                 data_blob_free(&value);
 252                 return 0;
 253         }
 254
 255         d_fprintf(stderr, _("Failed to find entry\n"));
 256         return -1;
 257 }
 258
 259
 260 /**
 261  * Search an entry/entries in the cache
 262  *
 263  * @param c     A net_context structure
 264  * @param argv key pattern to match the entries to
 265  * @return 0 on success, otherwise failure
 266  **/
 267 static int net_cache_search(struct net_context *c, int argc, const char **argv)
 268 {
 269         const char* pattern;
 270
 271         if (argc < 1 || c->display_usage) {
 272                 d_printf("%s\n%s",
 273                          _("Usage:"),
 274                          _(" net cache search <pattern>\n"));
 275                 return -1;
 276         }
 277
 278         pattern = argv[0];
 279         gencache_iterate_blobs(print_cache_entry, NULL, pattern);
 280         return 0;
 281 }
 282
 283
 284 /**
 285  * List the contents of the cache
 286  *
 287  * @param c     A net_context structure
 288  * @param argv ignored in this functionailty
 289  * @return always returns 0
 290  **/
 291 static int net_cache_list(struct net_context *c, int argc, const char **argv)
 292 {
 293         const char* pattern = "*";
 294
 295         if (c->display_usage) {
 296                 d_printf(  "%s\n"
 297                            "net cache list\n"
 298                            "    %s\n",
 299                          _("Usage:"),
 300                          _("List all cache entries."));
 301                 return 0;
 302         }
 303         gencache_iterate_blobs(print_cache_entry, NULL, pattern);
 304         return 0;
 305 }
 306
 307
 308 /**
 309  * Flush the whole cache
 310  *
 311  * @param c     A net_context structure
 312  * @param argv ignored in this functionality
 313  * @return always returns 0
 314  **/
 315 static int net_cache_flush(struct net_context *c, int argc, const char **argv)
 316 {
 317         const char* pattern = "*";
 318         if (c->display_usage) {
 319                 d_printf(  "%s\n"
 320                            "net cache flush\n"
 321                            "    %s",
 322                          _("Usage:"),
 323                          _("Delete all cache entries."));
 324                 return 0;
 325         }
 326         gencache_iterate(delete_cache_entry, NULL, pattern);
 327         return 0;
 328 }
 329
 330 static int net_cache_stabilize(struct net_context *c, int argc,
 331                                const char **argv)
 332 {
 333         if (c->display_usage) {
 334                 d_printf(  "%s\n"
 335                            "net cache stabilize\n"
 336                            "    %s\n",
 337                          _("Usage:"),
 338                          _("Move transient cache content to stable storage"));
 339                 return 0;
 340         }
 341
 342         if (!gencache_stabilize()) {
 343                 return -1;
 344         }
 345         return 0;
 346 }
 347
 348 static int netsamlog_cache_for_all_cb(const char *sid_str,
 349                                       time_t when_cached,
 350                                       struct netr_SamInfo3 *info3,
 351                                       void *private_data)
 352 {
 353         struct net_context *c = (struct net_context *)private_data;
 354         char *name = NULL;
 355
 356         name = talloc_asprintf(c, "%s\\%s",
 357                                info3->base.logon_domain.string,
 358                                info3->base.account_name.string);
 359         if (name == NULL) {
 360                 return -1;
 361         }
 362
 363         d_printf("%-50s %-40s %s\n",
 364                  sid_str,
 365                  name,
 366                  timestring(c, when_cached));
 367
 368         return 0;
 369 }
 370
 371 static int net_cache_samlogon_list(struct net_context *c,
 372                                    int argc,
 373                                    const char **argv)
 374 {
 375         int ret;
 376
 377         d_printf("%-50s %-40s When cached\n", "SID", "Name");
 378         d_printf("------------------------------------------------------------"
 379                  "------------------------------------------------------------"
 380                  "----\n");
 381
 382         ret = netsamlog_cache_for_all(netsamlog_cache_for_all_cb, c);
 383         if (ret == -1) {
 384                 return -1;
 385         }
 386
 387         return 0;
 388 }
 389
 390 static int net_cache_samlogon_show(struct net_context *c,
 391                                    int argc,
 392                                    const char **argv)
 393 {
 394         const char *sid_str = argv[0];
 395         struct dom_sid sid;
 396         struct dom_sid *user_sids = NULL;
 397         uint32_t num_user_sids;
 398         struct netr_SamInfo3 *info3 = NULL;
 399         char *name = NULL;
 400         uint32_t i;
 401         NTSTATUS status;
 402         bool ok;
 403
 404         if (argc != 1 || c->display_usage) {
 405                 d_printf("%s\n"
 406                          "net cache samlogon show SID\n"
 407                          "    %s\n",
 408                          _("Usage:"),
 409                          _("Show samlogon cache entry for SID."));
 410                 return 0;
 411         }
 412
 413         ok = string_to_sid(&sid, sid_str);
 414         if (!ok) {
 415                 d_printf("String to SID failed for %s\n", sid_str);
 416                 return -1;
 417         }
 418
 419         info3 = netsamlogon_cache_get(c, &sid);
 420         if (info3 == NULL) {
 421                 d_printf("SID %s not found in samlogon cache\n", sid_str);
 422                 return -1;
 423         }
 424
 425         name = talloc_asprintf(c, "%s\\%s",
 426                                info3->base.logon_domain.string,
 427                                info3->base.account_name.string);
 428         if (name == NULL) {
 429                 return -1;
 430         }
 431
 432         d_printf("Name: %s\n", name);
 433
 434         status = sid_array_from_info3(c,
 435                                       info3,
 436                                       &user_sids,
 437                                       &num_user_sids,
 438                                       true);
 439         if (!NT_STATUS_IS_OK(status)) {
 440                 d_printf("sid_array_from_info3 failed for %s\n", sid_str);
 441                 return -1;
 442         }
 443
 444         for (i = 0; i < num_user_sids; i++) {
 445                 d_printf("SID %2" PRIu32 ": %s\n",
 446                          i, sid_string_dbg(&user_sids[i]));
 447         }
 448
 449         return 0;
 450 }
 451
 452 static int net_cache_samlogon_ndrdump(struct net_context *c,
 453                                       int argc,
 454                                       const char **argv)
 455 {
 456         const char *sid_str = NULL;
 457         struct dom_sid sid;
 458         struct netr_SamInfo3 *info3 = NULL;
 459         struct ndr_print *ndr_print = NULL;
 460         bool ok;
 461
 462         if (argc != 1 || c->display_usage) {
 463                 d_printf(  "%s\n"
 464                            "net cache samlogon ndrdump SID\n"
 465                            "    %s\n",
 466                            _("Usage:"),
 467                            _("Show samlogon cache entry for SID."));
 468                 return 0;
 469         }
 470
 471         sid_str = argv[0];
 472
 473         ok = string_to_sid(&sid, sid_str);
 474         if (!ok) {
 475                 d_printf("String to SID failed for %s\n", sid_str);
 476                 return -1;
 477         }
 478
 479         info3 = netsamlogon_cache_get(c, &sid);
 480         if (info3 == NULL) {
 481                 d_printf("SID %s not found in samlogon cache\n", sid_str);
 482                 return -1;
 483         }
 484
 485         ndr_print = talloc_zero(c, struct ndr_print);
 486         if (ndr_print == NULL) {
 487                 d_printf("Could not allocate memory.\n");
 488                 return -1;
 489         }
 490
 491         ndr_print->print = ndr_print_printf_helper;
 492         ndr_print->depth = 1;
 493         ndr_print_netr_SamInfo3(ndr_print, "netr_SamInfo3", info3);
 494         TALLOC_FREE(ndr_print);
 495
 496         return 0;
 497 }
 498
 499 static int net_cache_samlogon_delete(struct net_context *c,
 500                                      int argc,
 501                                      const char **argv)
 502 {
 503         const char *sid_str = argv[0];
 504         struct dom_sid sid;
 505         bool ok;
 506
 507         if (argc != 1 || c->display_usage) {
 508                 d_printf(  "%s\n"
 509                            "net cache samlogon delete SID\n"
 510                            "    %s\n",
 511                          _("Usage:"),
 512                          _("Delete samlogon cache entry for SID."));
 513                 return 0;
 514         }
 515
 516         ok = string_to_sid(&sid, sid_str);
 517         if (!ok) {
 518                 d_printf("String to SID failed for %s\n", sid_str);
 519                 return -1;
 520         }
 521
 522         netsamlogon_clear_cached_user(&sid);
 523
 524         return 0;
 525 }
 526
 527 static int net_cache_samlogon(struct net_context *c, int argc, const char **argv)
 528 {
 529         struct functable func[] = {
 530                 {
 531                         "list",
 532                         net_cache_samlogon_list,
 533                         NET_TRANSPORT_LOCAL,
 534                         N_("List samlogon cache"),
 535                         N_("net cache samlogon list\n"
 536                            "    List samlogon cachen\n")
 537                 },
 538                 {
 539                         "show",
 540                         net_cache_samlogon_show,
 541                         NET_TRANSPORT_LOCAL,
 542                         N_("Show samlogon cache entry"),
 543                         N_("net cache samlogon show SID\n"
 544                            "    Show samlogon cache entry\n")
 545                 },
 546                 {
 547                         "ndrdump",
 548                         net_cache_samlogon_ndrdump,
 549                         NET_TRANSPORT_LOCAL,
 550                         N_("Dump the samlogon cache entry NDR blob"),
 551                         N_("net cache samlogon ndrdump SID\n"
 552                            "    Dump the samlogon cache entry NDR blob\n")
 553                 },
 554                 {
 555                         "delete",
 556                         net_cache_samlogon_delete,
 557                         NET_TRANSPORT_LOCAL,
 558                         N_("Delete samlogon cache entry"),
 559                         N_("net cache samlogon delete SID\n"
 560                            "    Delete samlogon cache entry\n")
 561                 },
 562                 {NULL, NULL, 0, NULL, NULL}
 563         };
 564
 565         return net_run_function(c, argc, argv, "net cache samlogon", func);
 566 }
 567
 568 /**
 569  * Entry point to 'net cache' subfunctionality
 570  *
 571  * @param c     A net_context structure
 572  * @param argv arguments passed to further called functions
 573  * @return whatever further functions return
 574  **/
 575 int net_cache(struct net_context *c, int argc, const char **argv)
 576 {
 577         struct functable func[] = {
 578                 {
 579                         "add",
 580                         net_cache_add,
 581                         NET_TRANSPORT_LOCAL,
 582                         N_("Add new cache entry"),
 583                         N_("net cache add <key string> <data string> <timeout>\n"
 584                            "  Add new cache entry.\n"
 585                            "    key string\tKey string to add cache data under.\n"
 586                            "    data string\tData to store under given key.\n"
 587                            "    timeout\tTimeout for cache data.")
 588                 },
 589                 {
 590                         "del",
 591                         net_cache_del,
 592                         NET_TRANSPORT_LOCAL,
 593                         N_("Delete existing cache entry by key"),
 594                         N_("net cache del <key string>\n"
 595                            "  Delete existing cache entry by key.\n"
 596                            "    key string\tKey string to delete.")
 597                 },
 598                 {
 599                         "get",
 600                         net_cache_get,
 601                         NET_TRANSPORT_LOCAL,
 602                         N_("Get cache entry by key"),
 603                         N_("net cache get <key string>\n"
 604                            "  Get cache entry by key.\n"
 605                            "    key string\tKey string to look up cache entry for.")
 606
 607                 },
 608                 {
 609                         "search",
 610                         net_cache_search,
 611                         NET_TRANSPORT_LOCAL,
 612                         N_("Search entry by pattern"),
 613                         N_("net cache search <pattern>\n"
 614                            "  Search entry by pattern.\n"
 615                            "    pattern\tPattern to search for in cache.")
 616                 },
 617                 {
 618                         "list",
 619                         net_cache_list,
 620                         NET_TRANSPORT_LOCAL,
 621                         N_("List all cache entries"),
 622                         N_("net cache list\n"
 623                            "  List all cache entries")
 624                 },
 625                 {
 626                         "flush",
 627                         net_cache_flush,
 628                         NET_TRANSPORT_LOCAL,
 629                         N_("Delete all cache entries"),
 630                         N_("net cache flush\n"
 631                            "  Delete all cache entries")
 632                 },
 633                 {
 634                         "stabilize",
 635                         net_cache_stabilize,
 636                         NET_TRANSPORT_LOCAL,
 637                         N_("Move transient cache content to stable storage"),
 638                         N_("net cache stabilize\n"
 639                            "  Move transient cache content to stable storage")
 640                 },
 641                 {
 642                         "samlogon",
 643                         net_cache_samlogon,
 644                         NET_TRANSPORT_LOCAL,
 645                         N_("List contents of the samlogon cache"),
 646                         N_("net cache samlogon\n"
 647                            "  List contents of the samlogon cache")
 648                 },
 649                 {NULL, NULL, 0, NULL, NULL}
 650         };
 651
 652         return net_run_function(c, argc, argv, "net cache", func);
 653 }