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 2 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, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #include "includes.h"
  21 #include "utils/net.h"
  22
  23 #define ALLOC_CHECK(mem) do { \
  24         if (!mem) { \
  25                 d_fprintf(stderr, "Out of memory!\n"); \
  26                 talloc_free(ctx); \
  27                 return -1; \
  28         } } while(0)
  29
  30 /***********************************************************
  31  Helper function for net_idmap_dump. Dump one entry.
  32  **********************************************************/
  33 static int net_idmap_dump_one_entry(TDB_CONTEXT *tdb,
  34                                     TDB_DATA key,
  35                                     TDB_DATA data,
  36                                     void *unused)
  37 {
  38         if (strcmp(key.dptr, "USER HWM") == 0) {
  39                 printf("USER HWM %d\n", IVAL(data.dptr,0));
  40                 return 0;
  41         }
  42
  43         if (strcmp(key.dptr, "GROUP HWM") == 0) {
  44                 printf("GROUP HWM %d\n", IVAL(data.dptr,0));
  45                 return 0;
  46         }
  47
  48         if (strncmp(key.dptr, "S-", 2) != 0)
  49                 return 0;
  50
  51         printf("%s %s\n", data.dptr, key.dptr);
  52         return 0;
  53 }
  54
  55 /***********************************************************
  56  Dump the current idmap
  57  **********************************************************/
  58 static int net_idmap_dump(int argc, const char **argv)
  59 {
  60         TDB_CONTEXT *idmap_tdb;
  61
  62         if ( argc != 1 )
  63                 return net_help_idmap( argc, argv );
  64
  65         idmap_tdb = tdb_open_log(argv[0], 0, TDB_DEFAULT, O_RDONLY, 0);
  66
  67         if (idmap_tdb == NULL) {
  68                 d_fprintf(stderr, "Could not open idmap: %s\n", argv[0]);
  69                 return -1;
  70         }
  71
  72         tdb_traverse(idmap_tdb, net_idmap_dump_one_entry, NULL);
  73
  74         tdb_close(idmap_tdb);
  75
  76         return 0;
  77 }
  78
  79 /***********************************************************
  80  Write entries from stdin to current local idmap
  81  **********************************************************/
  82
  83 static int net_idmap_restore(int argc, const char **argv)
  84 {
  85         TALLOC_CTX *ctx;
  86         FILE *input;
  87
  88         if (! winbind_ping()) {
  89                 d_fprintf(stderr, "To use net idmap Winbindd must be running.\n");
  90                 return -1;
  91         }
  92
  93         ctx = talloc_new(NULL);
  94         ALLOC_CHECK(ctx);
  95
  96         if (argc == 1) {
  97                 input = fopen(argv[0], "r");
  98         } else {
  99                 input = stdin;
 100         }
 101
 102         while (!feof(input)) {
 103                 char line[128], sid_string[128];
 104                 int len;
 105                 DOM_SID sid;
 106                 struct id_map map;
 107                 unsigned long idval;
 108
 109                 if (fgets(line, 127, input) == NULL)
 110                         break;
 111
 112                 len = strlen(line);
 113
 114                 if ( (len > 0) && (line[len-1] == '\n') )
 115                         line[len-1] = '\0';
 116
 117                 if (sscanf(line, "GID %lu %128s", &idval, sid_string) == 2) {
 118                         map.xid.type = ID_TYPE_GID;
 119                         map.xid.id = idval;
 120                 } else if (sscanf(line, "UID %lu %128s", &idval, sid_string) == 2) {
 121                         map.xid.type = ID_TYPE_UID;
 122                         map.xid.id = idval;
 123                 } else if (sscanf(line, "USER HWM %lu", &idval) == 1) {
 124                         /* set uid hwm */
 125                         if (! winbind_set_uid_hwm(idval)) {
 126                                 d_fprintf(stderr, "Could not set USER HWM\n");
 127                         }
 128                         continue;
 129                 } else if (sscanf(line, "GROUP HWM %lu", &idval) == 1) {
 130                         /* set gid hwm */
 131                         if (! winbind_set_gid_hwm(idval)) {
 132                                 d_fprintf(stderr, "Could not set GROUP HWM\n");
 133                         }
 134                         continue;
 135                 } else {
 136                         d_fprintf(stderr, "ignoring invalid line [%s]\n", line);
 137                         continue;
 138                 }
 139
 140                 if (!string_to_sid(&sid, sid_string)) {
 141                         d_fprintf(stderr, "ignoring invalid sid [%s]\n", sid_string);
 142                         continue;
 143                 }
 144                 map.sid = &sid;
 145
 146                 if (!winbind_set_mapping(&map)) {
 147                         d_fprintf(stderr, "Could not set mapping of %s %lu to sid %s\n",
 148                                  (map.xid.type == ID_TYPE_GID) ? "GID" : "UID",
 149                                  (unsigned long)map.xid.id, sid_string_static(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 <outputfile>\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 /***********************************************************
 288  Look at the current idmap
 289  **********************************************************/
 290 int net_idmap(int argc, const char **argv)
 291 {
 292         struct functable func[] = {
 293                 {"dump", net_idmap_dump},
 294                 {"restore", net_idmap_restore},
 295                 {"setmap", net_idmap_set },
 296                 {"delete", net_idmap_delete},
 297                 {"secret", net_idmap_secret},
 298                 {"help", net_help_idmap},
 299                 {NULL, NULL}
 300         };
 301
 302         return net_run_function(argc, argv, func, net_help_idmap);
 303 }
 304
 305