source/groupdb/aliasdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Jeremy Allison 1996-1998
   5    Copyright (C) Luke Kenneth Caseson Leighton 1996-1998
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mases Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 extern fstring global_sam_name;
  25
  26 /*
  27  * NOTE. All these functions are abstracted into a structure
  28  * that points to the correct function for the selected database. JRA.
  29  */
  30
  31 static struct aliasdb_ops *aldb_ops;
  32
  33 /***************************************************************
  34  Initialise the alias db operations.
  35 ***************************************************************/
  36
  37 BOOL initialise_alias_db(void)
  38 {
  39   if (aldb_ops)
  40   {
  41     return True;
  42   }
  43
  44 #ifdef WITH_LDAP
  45   aldb_ops = ldap_initialise_alias_db();
  46 #else
  47   aldb_ops = file_initialise_alias_db();
  48 #endif
  49
  50   return (aldb_ops != NULL);
  51 }
  52
  53 /*
  54  * Functions that return/manipulate a LOCAL_GRP.
  55  */
  56
  57 /************************************************************************
  58  Utility function to search alias database by gid: the LOCAL_GRP
  59  structure does not have a gid member, so we have to convert here
  60  from gid to alias rid.
  61 *************************************************************************/
  62 LOCAL_GRP *iterate_getaliasgid(gid_t gid, LOCAL_GRP_MEMBER **mem, int *num_mem)
  63 {
  64         return iterate_getaliasrid(pwdb_gid_to_alias_rid(gid), mem, num_mem);
  65 }
  66
  67 /************************************************************************
  68  Utility function to search alias database by rid.  use this if your database
  69  does not have search facilities.
  70 *************************************************************************/
  71 LOCAL_GRP *iterate_getaliasrid(uint32 rid, LOCAL_GRP_MEMBER **mem, int *num_mem)
  72 {
  73         LOCAL_GRP *als = NULL;
  74         void *fp = NULL;
  75
  76         DEBUG(10, ("search by rid: 0x%x\n", rid));
  77
  78         /* Open the alias database file - not for update. */
  79         fp = startaliasent(False);
  80
  81         if (fp == NULL)
  82         {
  83                 DEBUG(0, ("unable to open alias database.\n"));
  84                 return NULL;
  85         }
  86
  87         while ((als = getaliasent(fp, mem, num_mem)) != NULL && als->rid != rid)
  88         {
  89         }
  90
  91         if (als != NULL)
  92         {
  93                 DEBUG(10, ("found alias %s by rid: 0x%x\n", als->name, rid));
  94         }
  95
  96         endaliasent(fp);
  97         return als;
  98 }
  99
 100 /************************************************************************
 101  Utility function to search alias database by name.  use this if your database
 102  does not have search facilities.
 103 *************************************************************************/
 104 LOCAL_GRP *iterate_getaliasnam(char *name, LOCAL_GRP_MEMBER **mem, int *num_mem)
 105 {
 106         LOCAL_GRP *als = NULL;
 107         void *fp = NULL;
 108
 109         DEBUG(10, ("search by name: %s\n", name));
 110
 111         /* Open the alias database file - not for update. */
 112         fp = startaliasent(False);
 113
 114         if (fp == NULL)
 115         {
 116                 DEBUG(0, ("unable to open alias database.\n"));
 117                 return NULL;
 118         }
 119
 120         while ((als = getaliasent(fp, mem, num_mem)) != NULL && !strequal(als->name, name))
 121         {
 122         }
 123
 124         if (als != NULL)
 125         {
 126                 DEBUG(10, ("found by name: %s\n", name));
 127         }
 128
 129         endaliasent(fp);
 130         return als;
 131 }
 132
 133 /*************************************************************************
 134  Routine to return the next entry in the smbdomainalias list.
 135  *************************************************************************/
 136 BOOL add_domain_alias(LOCAL_GRP **alss, int *num_alss, LOCAL_GRP *als)
 137 {
 138         LOCAL_GRP *talss;
 139
 140         if (alss == NULL || num_alss == NULL || als == NULL)
 141                 return False;
 142
 143         talss = Realloc((*alss), ((*num_alss)+1) * sizeof(LOCAL_GRP));
 144         if (talss == NULL) {
 145                 SAFE_FREE(*alss);
 146                 return False;
 147         } else
 148                 (*alss) = talss;
 149
 150         DEBUG(10,("adding alias %s(%s)\n", als->name, als->comment));
 151
 152         fstrcpy((*alss)[(*num_alss)].name   , als->name);
 153         fstrcpy((*alss)[(*num_alss)].comment, als->comment);
 154         (*alss)[(*num_alss)].rid = als->rid;
 155
 156         (*num_alss)++;
 157
 158         return True;
 159 }
 160
 161 /*************************************************************************
 162  checks to see if a user is a member of a domain alias
 163  *************************************************************************/
 164 static BOOL user_is_member(char *user_name, LOCAL_GRP_MEMBER *mem, int num_mem)
 165 {
 166         int i;
 167         pstring name;
 168         slprintf(name, sizeof(name)-1, "\\%s\\%s", global_sam_name, user_name);
 169
 170         for (i = 0; i < num_mem; i++)
 171         {
 172                 DEBUG(10,("searching against user %s...\n", mem[i].name));
 173                 if (strequal(mem[i].name, name))
 174                 {
 175                         DEBUG(10,("searching for user %s: found\n", name));
 176                         return True;
 177                 }
 178         }
 179         DEBUG(10,("searching for user %s: not found\n", name));
 180         return False;
 181 }
 182
 183 /*************************************************************************
 184  gets an array of aliases that a user is in.  use this if your database
 185  does not have search facilities
 186  *************************************************************************/
 187 BOOL iterate_getuseraliasnam(char *user_name, LOCAL_GRP **alss, int *num_alss)
 188 {
 189         LOCAL_GRP *als;
 190         LOCAL_GRP_MEMBER *mem = NULL;
 191         int num_mem = 0;
 192         void *fp = NULL;
 193
 194         DEBUG(10, ("search for useralias by name: %s\n", user_name));
 195
 196         if (user_name == NULL || als == NULL || num_alss == NULL)
 197         {
 198                 return False;
 199         }
 200
 201         (*alss) = NULL;
 202         (*num_alss) = 0;
 203
 204         /* Open the alias database file - not for update. */
 205         fp = startaliasent(False);
 206
 207         if (fp == NULL)
 208         {
 209                 DEBUG(0, ("unable to open alias database.\n"));
 210                 return False;
 211         }
 212
 213         /* iterate through all aliases.  search members for required user */
 214         while ((als = getaliasent(fp, &mem, &num_mem)) != NULL)
 215         {
 216                 DEBUG(5,("alias name %s members: %d\n", als->name, num_mem));
 217                 if (num_mem != 0 && mem != NULL)
 218                 {
 219                         BOOL ret = True;
 220                         if (user_is_member(user_name, mem, num_mem))
 221                         {
 222                                 ret = add_domain_alias(alss, num_alss, als);
 223                         }
 224
 225                         SAFE_FREE(mem);
 226                         num_mem = 0;
 227
 228                         if (!ret)
 229                         {
 230                                 (*num_alss) = 0;
 231                                 break;
 232                         }
 233                 }
 234         }
 235
 236         if ((*num_alss) != 0)
 237         {
 238                 DEBUG(10, ("found %d user aliases:\n", (*num_alss)));
 239         }
 240
 241         endaliasent(fp);
 242         return True;
 243 }
 244
 245 /*************************************************************************
 246  gets an array of aliases that a user is in.  use this if your database
 247  does not have search facilities
 248  *************************************************************************/
 249 BOOL enumdomaliases(LOCAL_GRP **alss, int *num_alss)
 250 {
 251         LOCAL_GRP *als;
 252         void *fp = NULL;
 253
 254         DEBUG(10, ("enum user aliases\n"));
 255
 256         if (als == NULL || num_alss == NULL)
 257         {
 258                 return False;
 259         }
 260
 261         (*alss) = NULL;
 262         (*num_alss) = 0;
 263
 264         /* Open the alias database file - not for update. */
 265         fp = startaliasent(False);
 266
 267         if (fp == NULL)
 268         {
 269                 DEBUG(0, ("unable to open alias database.\n"));
 270                 return False;
 271         }
 272
 273         /* iterate through all aliases. */
 274         while ((als = getaliasent(fp, NULL, NULL)) != NULL)
 275         {
 276                 if (!add_domain_alias(alss, num_alss, als))
 277                 {
 278                         DEBUG(0,("unable to add alias while enumerating\n"));
 279                         return False;
 280                 }
 281         }
 282
 283         if ((*num_alss) != 0)
 284         {
 285                 DEBUG(10, ("found %d user aliases:\n", (*num_alss)));
 286         }
 287
 288         endaliasent(fp);
 289         return True;
 290 }
 291
 292 /***************************************************************
 293  Start to enumerate the alias database list. Returns a void pointer
 294  to ensure no modification outside this module.
 295 ****************************************************************/
 296
 297 void *startaliasent(BOOL update)
 298 {
 299   return aldb_ops->startaliasent(update);
 300 }
 301
 302 /***************************************************************
 303  End enumeration of the alias database list.
 304 ****************************************************************/
 305
 306 void endaliasent(void *vp)
 307 {
 308   aldb_ops->endaliasent(vp);
 309 }
 310
 311 /*************************************************************************
 312  Routine to return the next entry in the alias database list.
 313  *************************************************************************/
 314
 315 LOCAL_GRP *getaliasent(void *vp, LOCAL_GRP_MEMBER **mem, int *num_mem)
 316 {
 317         return aldb_ops->getaliasent(vp, mem, num_mem);
 318 }
 319
 320 /************************************************************************
 321  Routine to add an entry to the alias database file.
 322 *************************************************************************/
 323
 324 BOOL add_alias_entry(LOCAL_GRP *newals)
 325 {
 326         return aldb_ops->add_alias_entry(newals);
 327 }
 328
 329 /************************************************************************
 330  Routine to search the alias database file for an entry matching the aliasname.
 331  and then replace the entry.
 332 ************************************************************************/
 333
 334 BOOL mod_alias_entry(LOCAL_GRP* als)
 335 {
 336         return aldb_ops->mod_alias_entry(als);
 337 }
 338
 339 /************************************************************************
 340  Routine to search alias database by name.
 341 *************************************************************************/
 342
 343 LOCAL_GRP *getaliasnam(char *name, LOCAL_GRP_MEMBER **mem, int *num_mem)
 344 {
 345         return aldb_ops->getaliasnam(name, mem, num_mem);
 346 }
 347
 348 /************************************************************************
 349  Routine to search alias database by alias rid.
 350 *************************************************************************/
 351
 352 LOCAL_GRP *getaliasrid(uint32 alias_rid, LOCAL_GRP_MEMBER **mem, int *num_mem)
 353 {
 354         return aldb_ops->getaliasrid(alias_rid, mem, num_mem);
 355 }
 356
 357 /************************************************************************
 358  Routine to search alias database by gid.
 359 *************************************************************************/
 360
 361 LOCAL_GRP *getaliasgid(gid_t gid, LOCAL_GRP_MEMBER **mem, int *num_mem)
 362 {
 363         return aldb_ops->getaliasgid(gid, mem, num_mem);
 364 }
 365
 366 /*************************************************************************
 367  gets an array of aliases that a user is in.
 368  *************************************************************************/
 369 BOOL getuseraliasnam(char *user_name, LOCAL_GRP **als, int *num_alss)
 370 {
 371         return aldb_ops->getuseraliasnam(user_name, als, num_alss);
 372 }
 373
 374 /*************************************************************
 375  initialises a LOCAL_GRP.
 376  **************************************************************/
 377
 378 void aldb_init_als(LOCAL_GRP *als)
 379 {
 380         if (als == NULL) return;
 381         ZERO_STRUCTP(als);
 382 }
 383