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  Dump the current idmap
  32  **********************************************************/
  33 static int net_idmap_dump(int argc, const char **argv)
  34 {
  35         TALLOC_CTX *ctx;
  36         char *filename;
  37
  38         if (argc != 1) {
  39                 return net_help_idmap(argc, argv);
  40         }
  41
  42         if (! winbind_ping()) {
  43                 d_fprintf(stderr, "To use net idmap Winbindd must be running.\n");
  44                 return -1;
  45         }
  46
  47         ctx = talloc_new(NULL);
  48         ALLOC_CHECK(ctx);
  49
  50         filename = talloc_strdup(ctx, argv[0]);
  51         ALLOC_CHECK(filename);
  52
  53         /* filename must be absolute */
  54         if (*filename != '/') {
  55                 char path[4096];
  56
  57                 filename = getcwd(path, 4095);
  58                 if ( ! filename) {
  59                         d_fprintf(stderr, "Failed to obtain full output file path");
  60                         talloc_free(ctx);
  61                         return -1;
  62                 }
  63
  64                 filename = talloc_asprintf(ctx, "%s/%s", path, argv[0]);
  65                 ALLOC_CHECK(filename);
  66         }
  67
  68         if ( ! winbind_idmap_dump_maps(ctx, filename)) {
  69                 d_fprintf(stderr, "Failed to obtain idmap data from winbindd\n");
  70                 talloc_free(ctx);
  71                 return -1;
  72         }
  73
  74         talloc_free(ctx);
  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, sid_string_static(map.sid));
 149                         continue;
 150                 }
 151
 152         }
 153
 154         if (input != stdin) {
 155                 fclose(input);
 156         }
 157
 158         talloc_free(ctx);
 159         return 0;
 160 }
 161
 162 /***********************************************************
 163  Delete a SID mapping from a winbindd_idmap.tdb
 164  **********************************************************/
 165 static int net_idmap_delete(int argc, const char **argv)
 166 {
 167         d_printf("Not Implemented yet\n");
 168         return -1;
 169 }
 170
 171 static int net_idmap_set(int argc, const char **argv)
 172 {
 173         d_printf("Not Implemented yet\n");
 174         return -1;
 175 }
 176 BOOL idmap_store_secret(const char *backend, bool alloc,
 177                         const char *domain, const char *identity,
 178                         const char *secret)
 179 {
 180         char *tmp;
 181         int r;
 182         BOOL ret;
 183
 184         if (alloc) {
 185                 r = asprintf(&tmp, "IDMAP_ALLOC_%s", backend);
 186         } else {
 187                 r = asprintf(&tmp, "IDMAP_%s_%s", backend, domain);
 188         }
 189
 190         if (r < 0) return false;
 191
 192         strupper_m(tmp); /* make sure the key is case insensitive */
 193         ret = secrets_store_generic(tmp, identity, secret);
 194
 195         free(tmp);
 196         return ret;
 197 }
 198
 199
 200 static int net_idmap_secret(int argc, const char **argv)
 201 {
 202         TALLOC_CTX *ctx;
 203         const char *secret;
 204         const char *dn;
 205         char *domain;
 206         char *backend;
 207         char *opt = NULL;
 208         BOOL ret;
 209
 210         if (argc != 2) {
 211                 return net_help_idmap(argc, argv);
 212         }
 213
 214         secret = argv[1];
 215
 216         ctx = talloc_new(NULL);
 217         ALLOC_CHECK(ctx);
 218
 219         if (strcmp(argv[0], "alloc") == 0) {
 220                 domain = NULL;
 221                 backend = lp_idmap_alloc_backend();
 222         } else {
 223                 domain = talloc_strdup(ctx, argv[0]);
 224                 ALLOC_CHECK(domain);
 225
 226                 opt = talloc_asprintf(ctx, "idmap config %s", domain);
 227                 ALLOC_CHECK(opt);
 228
 229                 backend = talloc_strdup(ctx, lp_parm_const_string(-1, opt, "backend", "tdb"));
 230                 ALLOC_CHECK(backend);
 231         }
 232
 233         if ( ( ! backend) || ( ! strequal(backend, "ldap"))) {
 234                 d_fprintf(stderr, "The only currently supported backend is LDAP\n");
 235                 talloc_free(ctx);
 236                 return -1;
 237         }
 238
 239         if (domain) {
 240
 241                 dn = lp_parm_const_string(-1, opt, "ldap_user_dn", NULL);
 242                 if ( ! dn) {
 243                         d_fprintf(stderr, "Missing ldap_user_dn option for domain %s\n", domain);
 244                         talloc_free(ctx);
 245                         return -1;
 246                 }
 247
 248                 ret = idmap_store_secret("ldap", false, domain, dn, secret);
 249         } else {
 250                 dn = lp_parm_const_string(-1, "idmap alloc config", "ldap_user_dn", NULL);
 251                 if ( ! dn) {
 252                         d_fprintf(stderr, "Missing ldap_user_dn option for alloc backend\n");
 253                         talloc_free(ctx);
 254                         return -1;
 255                 }
 256
 257                 ret = idmap_store_secret("ldap", true, NULL, dn, secret);
 258         }
 259
 260         if ( ! ret) {
 261                 d_fprintf(stderr, "Failed to store secret\n");
 262                 talloc_free(ctx);
 263                 return -1;
 264         }
 265
 266         d_printf("Secret stored\n");
 267         return 0;
 268 }
 269
 270 int net_help_idmap(int argc, const char **argv)
 271 {
 272         d_printf("net idmap dump <outputfile>\n"\
 273                  "    Dump current id mapping\n");
 274
 275         d_printf("net idmap restore\n"\
 276                  "    Restore entries from stdin\n");
 277
 278         /* Deliberately *not* document net idmap delete */
 279
 280         d_printf("net idmap secret <DOMAIN>|alloc <secret>\n"\
 281                  "    Set the secret for the specified DOMAIN (or the alloc module)\n");
 282
 283         return -1;
 284 }
 285
 286 /***********************************************************
 287  Look at the current idmap
 288  **********************************************************/
 289 int net_idmap(int argc, const char **argv)
 290 {
 291         struct functable func[] = {
 292                 {"dump", net_idmap_dump},
 293                 {"restore", net_idmap_restore},
 294                 {"setmap", net_idmap_set },
 295                 {"delete", net_idmap_delete},
 296                 {"secret", net_idmap_secret},
 297                 {"help", net_help_idmap},
 298                 {NULL, NULL}
 299         };
 300
 301         return net_run_function(argc, argv, func, net_help_idmap);
 302 }
 303
 304