source/rpc_server/srv_util.c

   1 /*
   2  *  Unix SMB/Netbios implementation.
   3  *  Version 1.9.
   4  *  RPC Pipe client / server routines
   5  *  Copyright (C) Andrew Tridgell              1992-1998
   6  *  Copyright (C) Luke Kenneth Casson Leighton 1996-1998,
   7  *  Copyright (C) Paul Ashton                  1997-1998.
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 /*  this module apparently provides an implementation of DCE/RPC over a
  25  *  named pipe (IPC$ connection using SMBtrans).  details of DCE/RPC
  26  *  documentation are available (in on-line form) from the X-Open group.
  27  *
  28  *  this module should provide a level of abstraction between SMB
  29  *  and DCE/RPC, while minimising the amount of mallocs, unnecessary
  30  *  data copies, and network traffic.
  31  *
  32  *  in this version, which takes a "let's learn what's going on and
  33  *  get something running" approach, there is additional network
  34  *  traffic generated, but the code should be easier to understand...
  35  *
  36  *  ... if you read the docs.  or stare at packets for weeks on end.
  37  *
  38  */
  39
  40 #include "includes.h"
  41
  42 extern int DEBUGLEVEL;
  43
  44 /*
  45  * A list of the rids of well known BUILTIN and Domain users
  46  * and groups.
  47  */
  48
  49 rid_name builtin_alias_rids[] =
  50 {
  51     { BUILTIN_ALIAS_RID_ADMINS       , "Administrators" },
  52     { BUILTIN_ALIAS_RID_USERS        , "Users" },
  53     { BUILTIN_ALIAS_RID_GUESTS       , "Guests" },
  54     { BUILTIN_ALIAS_RID_POWER_USERS  , "Power Users" },
  55
  56     { BUILTIN_ALIAS_RID_ACCOUNT_OPS  , "Account Operators" },
  57     { BUILTIN_ALIAS_RID_SYSTEM_OPS   , "System Operators" },
  58     { BUILTIN_ALIAS_RID_PRINT_OPS    , "Print Operators" },
  59     { BUILTIN_ALIAS_RID_BACKUP_OPS   , "Backup Operators" },
  60     { BUILTIN_ALIAS_RID_REPLICATOR   , "Replicator" },
  61     { 0                             , NULL }
  62 };
  63
  64 /* array lookup of well-known Domain RID users. */
  65 rid_name domain_user_rids[] =
  66 {
  67     { DOMAIN_USER_RID_ADMIN         , "Administrator" },
  68     { DOMAIN_USER_RID_GUEST         , "Guest" },
  69     { 0                             , NULL }
  70 };
  71
  72 /* array lookup of well-known Domain RID groups. */
  73 rid_name domain_group_rids[] =
  74 {
  75     { DOMAIN_GROUP_RID_ADMINS       , "Domain Admins" },
  76     { DOMAIN_GROUP_RID_USERS        , "Domain Users" },
  77     { DOMAIN_GROUP_RID_GUESTS       , "Domain Guests" },
  78     { 0                             , NULL }
  79 };
  80
  81 int make_dom_gids(TALLOC_CTX *ctx, char *gids_str, DOM_GID **ppgids)
  82 {
  83   char *ptr;
  84   pstring s2;
  85   int count;
  86   DOM_GID *gids;
  87
  88   *ppgids = NULL;
  89
  90   DEBUG(4,("make_dom_gids: %s\n", gids_str));
  91
  92   if (gids_str == NULL || *gids_str == 0)
  93     return 0;
  94
  95   for (count = 0, ptr = gids_str;
  96        next_token(&ptr, s2, NULL, sizeof(s2));
  97        count++)
  98     ;
  99
 100   gids = (DOM_GID *)talloc(ctx, sizeof(DOM_GID) * count );
 101   if(!gids)
 102   {
 103     DEBUG(0,("make_dom_gids: talloc fail !\n"));
 104     return 0;
 105   }
 106
 107   for (count = 0, ptr = gids_str;
 108        next_token(&ptr, s2, NULL, sizeof(s2)) &&
 109                count < LSA_MAX_GROUPS;
 110        count++)
 111   {
 112     /* the entries are of the form GID/ATTR, ATTR being optional.*/
 113     char *attr;
 114     uint32 rid = 0;
 115     int i;
 116
 117     attr = strchr(s2,'/');
 118     if (attr)
 119       *attr++ = 0;
 120
 121     if (!attr || !*attr)
 122       attr = "7"; /* default value for attribute is 7 */
 123
 124     /* look up the RID string and see if we can turn it into a rid number */
 125     for (i = 0; builtin_alias_rids[i].name != NULL; i++)
 126     {
 127       if (strequal(builtin_alias_rids[i].name, s2))
 128       {
 129         rid = builtin_alias_rids[i].rid;
 130         break;
 131       }
 132     }
 133
 134     if (rid == 0)
 135       rid = atoi(s2);
 136
 137     if (rid == 0)
 138     {
 139       DEBUG(1,("make_dom_gids: unknown well-known alias RID %s/%s\n", s2, attr));
 140       count--;
 141     }
 142     else
 143     {
 144       gids[count].g_rid = rid;
 145       gids[count].attr  = atoi(attr);
 146
 147       DEBUG(5,("group id: %d attr: %d\n", gids[count].g_rid, gids[count].attr));
 148     }
 149   }
 150
 151   *ppgids = gids;
 152   return count;
 153 }
 154
 155
 156 /*******************************************************************
 157  gets a domain user's groups
 158  ********************************************************************/
 159 void get_domain_user_groups(char *domain_groups, char *user)
 160 {
 161         pstring tmp;
 162
 163         if (domain_groups == NULL || user == NULL) return;
 164
 165         /* can only be a user or a guest.  cannot be guest _and_ admin */
 166         if (user_in_list(user, lp_domain_guest_group()))
 167         {
 168                 slprintf(tmp, sizeof(tmp) - 1, " %ld/7 ", DOMAIN_GROUP_RID_GUESTS);
 169                 pstrcat(domain_groups, tmp);
 170
 171                 DEBUG(3,("domain guest group access %s granted\n", tmp));
 172         }
 173         else
 174         {
 175                 slprintf(tmp, sizeof(tmp) -1, " %ld/7 ", DOMAIN_GROUP_RID_USERS);
 176                 pstrcat(domain_groups, tmp);
 177
 178                 DEBUG(3,("domain group access %s granted\n", tmp));
 179
 180                 if (user_in_list(user, lp_domain_admin_group()))
 181                 {
 182                         slprintf(tmp, sizeof(tmp) - 1, " %ld/7 ", DOMAIN_GROUP_RID_ADMINS);
 183                         pstrcat(domain_groups, tmp);
 184
 185                         DEBUG(3,("domain admin group access %s granted\n", tmp));
 186                 }
 187         }
 188 }
 189
 190 /*******************************************************************
 191  Look up a local (domain) rid and return a name and type.
 192  ********************************************************************/
 193 uint32 local_lookup_group_name(uint32 rid, char *group_name, uint32 *type)
 194 {
 195         int i = 0;
 196         (*type) = SID_NAME_DOM_GRP;
 197
 198         DEBUG(5,("lookup_group_name: rid: %d", rid));
 199
 200         while (domain_group_rids[i].rid != rid && domain_group_rids[i].rid != 0)
 201         {
 202                 i++;
 203         }
 204
 205         if (domain_group_rids[i].rid != 0)
 206         {
 207                 fstrcpy(group_name, domain_group_rids[i].name);
 208                 DEBUG(5,(" = %s\n", group_name));
 209                 return 0x0;
 210         }
 211
 212         DEBUG(5,(" none mapped\n"));
 213         return NT_STATUS_NONE_MAPPED;
 214 }
 215
 216 /*******************************************************************
 217  Look up a local alias rid and return a name and type.
 218  ********************************************************************/
 219 uint32 local_lookup_alias_name(uint32 rid, char *alias_name, uint32 *type)
 220 {
 221         int i = 0;
 222         (*type) = SID_NAME_WKN_GRP;
 223
 224         DEBUG(5,("lookup_alias_name: rid: %d", rid));
 225
 226         while (builtin_alias_rids[i].rid != rid && builtin_alias_rids[i].rid != 0)
 227         {
 228                 i++;
 229         }
 230
 231         if (builtin_alias_rids[i].rid != 0)
 232         {
 233                 fstrcpy(alias_name, builtin_alias_rids[i].name);
 234                 DEBUG(5,(" = %s\n", alias_name));
 235                 return 0x0;
 236         }
 237
 238         DEBUG(5,(" none mapped\n"));
 239         return NT_STATUS_NONE_MAPPED;
 240 }
 241
 242 /*******************************************************************
 243  Look up a local user rid and return a name and type.
 244  ********************************************************************/
 245 uint32 local_lookup_user_name(uint32 rid, char *user_name, uint32 *type)
 246 {
 247         SAM_ACCOUNT *sampwd=NULL;
 248         int i = 0;
 249         BOOL ret;
 250
 251         (*type) = SID_NAME_USER;
 252
 253         DEBUG(5,("lookup_user_name: rid: %d", rid));
 254
 255         /* look up the well-known domain user rids first */
 256         while (domain_user_rids[i].rid != rid && domain_user_rids[i].rid != 0)
 257         {
 258                 i++;
 259         }
 260
 261         if (domain_user_rids[i].rid != 0) {
 262                 fstrcpy(user_name, domain_user_rids[i].name);
 263                 DEBUG(5,(" = %s\n", user_name));
 264                 return 0x0;
 265         }
 266
 267         pdb_init_sam(&sampwd);
 268
 269         /* ok, it's a user.  find the user account */
 270         become_root();
 271         ret = pdb_getsampwrid(sampwd, rid);
 272         unbecome_root();
 273
 274         if (ret == True) {
 275                 fstrcpy(user_name, pdb_get_username(sampwd) );
 276                 DEBUG(5,(" = %s\n", user_name));
 277                 pdb_free_sam(sampwd);
 278                 return 0x0;
 279         }
 280
 281         DEBUG(5,(" none mapped\n"));
 282         pdb_free_sam(sampwd);
 283         return NT_STATUS_NONE_MAPPED;
 284 }
 285
 286 /*******************************************************************
 287  Look up a local (domain) group name and return a rid
 288  ********************************************************************/
 289 uint32 local_lookup_group_rid(char *group_name, uint32 *rid)
 290 {
 291         char *grp_name;
 292         int i = -1; /* start do loop at -1 */
 293
 294         do /* find, if it exists, a group rid for the group name*/
 295         {
 296                 i++;
 297                 (*rid) = domain_group_rids[i].rid;
 298                 grp_name = domain_group_rids[i].name;
 299
 300         } while (grp_name != NULL && !strequal(grp_name, group_name));
 301
 302         return (grp_name != NULL) ? 0 : NT_STATUS_NONE_MAPPED;
 303 }
 304
 305 /*******************************************************************
 306  Look up a local (BUILTIN) alias name and return a rid
 307  ********************************************************************/
 308 uint32 local_lookup_alias_rid(char *alias_name, uint32 *rid)
 309 {
 310         char *als_name;
 311         int i = -1; /* start do loop at -1 */
 312
 313         do /* find, if it exists, a alias rid for the alias name*/
 314         {
 315                 i++;
 316                 (*rid) = builtin_alias_rids[i].rid;
 317                 als_name = builtin_alias_rids[i].name;
 318
 319         } while (als_name != NULL && !strequal(als_name, alias_name));
 320
 321         return (als_name != NULL) ? 0 : NT_STATUS_NONE_MAPPED;
 322 }
 323
 324 /*******************************************************************
 325  Look up a local user name and return a rid
 326  ********************************************************************/
 327 uint32 local_lookup_user_rid(char *user_name, uint32 *rid)
 328 {
 329         SAM_ACCOUNT *sampass=NULL;
 330         BOOL ret;
 331
 332         (*rid) = 0;
 333
 334         pdb_init_sam(&sampass);
 335
 336         /* find the user account */
 337         become_root();
 338         ret = pdb_getsampwnam(sampass, user_name);
 339         unbecome_root();
 340
 341         if (ret == True) {
 342                 (*rid) = pdb_get_user_rid(sampass);
 343                 pdb_free_sam(sampass);
 344                 return 0x0;
 345         }
 346
 347         pdb_free_sam(sampass);
 348         return NT_STATUS_NONE_MAPPED;
 349 }