source/utils/net_idmap.c

   1 /*
   2    Samba Unix/Linux SMB client library
   3    Distributed SMB/CIFS Server Management Utility
   4    Copyright (C) 2003 Andrew Bartlett (abartlet@samba.org)
   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 #include "includes.h"
  20 #include "utils/net.h"
  21
  22 #define ALLOC_CHECK(mem) do { \
  23         if (!mem) { \
  24                 d_fprintf(stderr, "Out of memory!\n"); \
  25                 talloc_free(ctx); \
  26                 return -1; \
  27         } } while(0)
  28
  29 /***********************************************************
  30  Helper function for net_idmap_dump. Dump one entry.
  31  **********************************************************/
  32 static int net_idmap_dump_one_entry(TDB_CONTEXT *tdb,
  33                                     TDB_DATA key,
  34                                     TDB_DATA data,
  35                                     void *unused)
  36 {
  37         if (strcmp((char *)key.dptr, "USER HWM") == 0) {
  38                 printf("USER HWM %d\n", IVAL(data.dptr,0));
  39                 return 0;
  40         }
  41
  42         if (strcmp((char *)key.dptr, "GROUP HWM") == 0) {
  43                 printf("GROUP HWM %d\n", IVAL(data.dptr,0));
  44                 return 0;
  45         }
  46
  47         if (strncmp((char *)key.dptr, "S-", 2) != 0)
  48                 return 0;
  49
  50         printf("%s %s\n", data.dptr, key.dptr);
  51         return 0;
  52 }
  53
  54 /***********************************************************
  55  Dump the current idmap
  56  **********************************************************/
  57 static int net_idmap_dump(int argc, const char **argv)
  58 {
  59         TDB_CONTEXT *idmap_tdb;
  60
  61         if ( argc != 1 )
  62                 return net_help_idmap( argc, argv );
  63
  64         idmap_tdb = tdb_open_log(argv[0], 0, TDB_DEFAULT, O_RDONLY, 0);
  65
  66         if (idmap_tdb == NULL) {
  67                 d_fprintf(stderr, "Could not open idmap: %s\n", argv[0]);
  68                 return -1;
  69         }
  70
  71         tdb_traverse(idmap_tdb, net_idmap_dump_one_entry, NULL);
  72
  73         tdb_close(idmap_tdb);
  74
  75         return 0;
  76 }
  77
  78 /***********************************************************
  79  Write entries from stdin to current local idmap
  80  **********************************************************/
  81
  82 static int net_idmap_restore(int argc, const char **argv)
  83 {
  84         TALLOC_CTX *ctx;
  85         FILE *input;
  86
  87         if (! winbind_ping()) {
  88                 d_fprintf(stderr, "To use net idmap Winbindd must be running.\n");
  89                 return -1;
  90         }
  91
  92         ctx = talloc_new(NULL);
  93         ALLOC_CHECK(ctx);
  94
  95         if (argc == 1) {
  96                 input = fopen(argv[0], "r");
  97         } else {
  98                 input = stdin;
  99         }
 100
 101         while (!feof(input)) {
 102                 char line[128], sid_string[128];
 103                 int len;
 104                 DOM_SID sid;
 105                 struct id_map map;
 106                 unsigned long idval;
 107
 108                 if (fgets(line, 127, input) == NULL)
 109                         break;
 110
 111                 len = strlen(line);
 112
 113                 if ( (len > 0) && (line[len-1] == '\n') )
 114                         line[len-1] = '\0';
 115
 116                 if (sscanf(line, "GID %lu %128s", &idval, sid_string) == 2) {
 117                         map.xid.type = ID_TYPE_GID;
 118                         map.xid.id = idval;
 119                 } else if (sscanf(line, "UID %lu %128s", &idval, sid_string) == 2) {
 120                         map.xid.type = ID_TYPE_UID;
 121                         map.xid.id = idval;
 122                 } else if (sscanf(line, "USER HWM %lu", &idval) == 1) {
 123                         /* set uid hwm */
 124                         if (! winbind_set_uid_hwm(idval)) {
 125                                 d_fprintf(stderr, "Could not set USER HWM\n");
 126                         }
 127                         continue;
 128                 } else if (sscanf(line, "GROUP HWM %lu", &idval) == 1) {
 129                         /* set gid hwm */
 130                         if (! winbind_set_gid_hwm(idval)) {
 131                                 d_fprintf(stderr, "Could not set GROUP HWM\n");
 132                         }
 133                         continue;
 134                 } else {
 135                         d_fprintf(stderr, "ignoring invalid line [%s]\n", line);
 136                         continue;
 137                 }
 138
 139                 if (!string_to_sid(&sid, sid_string)) {
 140                         d_fprintf(stderr, "ignoring invalid sid [%s]\n", sid_string);
 141                         continue;
 142                 }
 143                 map.sid = &sid;
 144
 145                 if (!winbind_set_mapping(&map)) {
 146                         d_fprintf(stderr, "Could not set mapping of %s %lu to sid %s\n",
 147                                  (map.xid.type == ID_TYPE_GID) ? "GID" : "UID",
 148                                  (unsigned long)map.xid.id,
 149                                   sid_string_tos(map.sid));
 150                         continue;
 151                 }
 152
 153         }
 154
 155         if (input != stdin) {
 156                 fclose(input);
 157         }
 158
 159         talloc_free(ctx);
 160         return 0;
 161 }
 162
 163 /***********************************************************
 164  Delete a SID mapping from a winbindd_idmap.tdb
 165  **********************************************************/
 166 static int net_idmap_delete(int argc, const char **argv)
 167 {
 168         d_printf("Not Implemented yet\n");
 169         return -1;
 170 }
 171
 172 static int net_idmap_set(int argc, const char **argv)
 173 {
 174         d_printf("Not Implemented yet\n");
 175         return -1;
 176 }
 177 bool idmap_store_secret(const char *backend, bool alloc,
 178                         const char *domain, const char *identity,
 179                         const char *secret)
 180 {
 181         char *tmp;
 182         int r;
 183         bool ret;
 184
 185         if (alloc) {
 186                 r = asprintf(&tmp, "IDMAP_ALLOC_%s", backend);
 187         } else {
 188                 r = asprintf(&tmp, "IDMAP_%s_%s", backend, domain);
 189         }
 190
 191         if (r < 0) return false;
 192
 193         strupper_m(tmp); /* make sure the key is case insensitive */
 194         ret = secrets_store_generic(tmp, identity, secret);
 195
 196         free(tmp);
 197         return ret;
 198 }
 199
 200
 201 static int net_idmap_secret(int argc, const char **argv)
 202 {
 203         TALLOC_CTX *ctx;
 204         const char *secret;
 205         const char *dn;
 206         char *domain;
 207         char *backend;
 208         char *opt = NULL;
 209         bool ret;
 210
 211         if (argc != 2) {
 212                 return net_help_idmap(argc, argv);
 213         }
 214
 215         secret = argv[1];
 216
 217         ctx = talloc_new(NULL);
 218         ALLOC_CHECK(ctx);
 219
 220         if (strcmp(argv[0], "alloc") == 0) {
 221                 domain = NULL;
 222                 backend = lp_idmap_alloc_backend();
 223         } else {
 224                 domain = talloc_strdup(ctx, argv[0]);
 225                 ALLOC_CHECK(domain);
 226
 227                 opt = talloc_asprintf(ctx, "idmap config %s", domain);
 228                 ALLOC_CHECK(opt);
 229
 230                 backend = talloc_strdup(ctx, lp_parm_const_string(-1, opt, "backend", "tdb"));
 231                 ALLOC_CHECK(backend);
 232         }
 233
 234         if ( ( ! backend) || ( ! strequal(backend, "ldap"))) {
 235                 d_fprintf(stderr, "The only currently supported backend is LDAP\n");
 236                 talloc_free(ctx);
 237                 return -1;
 238         }
 239
 240         if (domain) {
 241
 242                 dn = lp_parm_const_string(-1, opt, "ldap_user_dn", NULL);
 243                 if ( ! dn) {
 244                         d_fprintf(stderr, "Missing ldap_user_dn option for domain %s\n", domain);
 245                         talloc_free(ctx);
 246                         return -1;
 247                 }
 248
 249                 ret = idmap_store_secret("ldap", false, domain, dn, secret);
 250         } else {
 251                 dn = lp_parm_const_string(-1, "idmap alloc config", "ldap_user_dn", NULL);
 252                 if ( ! dn) {
 253                         d_fprintf(stderr, "Missing ldap_user_dn option for alloc backend\n");
 254                         talloc_free(ctx);
 255                         return -1;
 256                 }
 257
 258                 ret = idmap_store_secret("ldap", true, NULL, dn, secret);
 259         }
 260
 261         if ( ! ret) {
 262                 d_fprintf(stderr, "Failed to store secret\n");
 263                 talloc_free(ctx);
 264                 return -1;
 265         }
 266
 267         d_printf("Secret stored\n");
 268         return 0;
 269 }
 270
 271 int net_help_idmap(int argc, const char **argv)
 272 {
 273         d_printf("net idmap dump <inputfile>\n"\
 274                  "    Dump current id mapping\n");
 275
 276         d_printf("net idmap restore\n"\
 277                  "    Restore entries from stdin\n");
 278
 279         /* Deliberately *not* document net idmap delete */
 280
 281         d_printf("net idmap secret <DOMAIN>|alloc <secret>\n"\
 282                  "    Set the secret for the specified DOMAIN (or the alloc module)\n");
 283
 284         return -1;
 285 }
 286
 287 static int net_idmap_aclmapset(int argc, const char **argv)
 288 {
 289         TALLOC_CTX *mem_ctx;
 290         int result = -1;
 291         DOM_SID src_sid, dst_sid;
 292         char *src, *dst;
 293         struct db_context *db;
 294         struct db_record *rec;
 295         NTSTATUS status;
 296
 297         if (argc != 3) {
 298                 d_fprintf(stderr, "usage: net idmap aclmapset <tdb> "
 299                           "<src-sid> <dst-sid>\n");
 300                 return -1;
 301         }
 302
 303         if (!(mem_ctx = talloc_init("net idmap aclmapset"))) {
 304                 d_fprintf(stderr, "talloc_init failed\n");
 305                 return -1;
 306         }
 307
 308         if (!(db = db_open(mem_ctx, argv[0], 0, TDB_DEFAULT,
 309                            O_RDWR|O_CREAT, 0600))) {
 310                 d_fprintf(stderr, "db_open failed: %s\n", strerror(errno));
 311                 goto fail;
 312         }
 313
 314         if (!string_to_sid(&src_sid, argv[1])) {
 315                 d_fprintf(stderr, "%s is not a valid sid\n", argv[1]);
 316                 goto fail;
 317         }
 318
 319         if (!string_to_sid(&dst_sid, argv[2])) {
 320                 d_fprintf(stderr, "%s is not a valid sid\n", argv[2]);
 321                 goto fail;
 322         }
 323
 324         if (!(src = sid_string_talloc(mem_ctx, &src_sid))
 325             || !(dst = sid_string_talloc(mem_ctx, &dst_sid))) {
 326                 d_fprintf(stderr, "talloc_strdup failed\n");
 327                 goto fail;
 328         }
 329
 330         if (!(rec = db->fetch_locked(
 331                       db, mem_ctx, string_term_tdb_data(src)))) {
 332                 d_fprintf(stderr, "could not fetch db record\n");
 333                 goto fail;
 334         }
 335
 336         status = rec->store(rec, string_term_tdb_data(dst), 0);
 337         TALLOC_FREE(rec);
 338
 339         if (!NT_STATUS_IS_OK(status)) {
 340                 d_fprintf(stderr, "could not store record: %s\n",
 341                           nt_errstr(status));
 342                 goto fail;
 343         }
 344
 345         result = 0;
 346 fail:
 347         TALLOC_FREE(mem_ctx);
 348         return result;
 349 }
 350
 351 /***********************************************************
 352  Look at the current idmap
 353  **********************************************************/
 354 int net_idmap(int argc, const char **argv)
 355 {
 356         struct functable func[] = {
 357                 {"dump", net_idmap_dump},
 358                 {"restore", net_idmap_restore},
 359                 {"setmap", net_idmap_set },
 360                 {"delete", net_idmap_delete},
 361                 {"secret", net_idmap_secret},
 362                 {"aclmapset", net_idmap_aclmapset},
 363                 {"help", net_help_idmap},
 364                 {NULL, NULL}
 365         };
 366
 367         return net_run_function(argc, argv, func, net_help_idmap);
 368 }
 369
 370