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 /*
  43  * A list of the rids of well known BUILTIN and Domain users
  44  * and groups.
  45  */
  46
  47 rid_name builtin_alias_rids[] =
  48 {
  49     { BUILTIN_ALIAS_RID_ADMINS       , "Administrators" },
  50     { BUILTIN_ALIAS_RID_USERS        , "Users" },
  51     { BUILTIN_ALIAS_RID_GUESTS       , "Guests" },
  52     { BUILTIN_ALIAS_RID_POWER_USERS  , "Power Users" },
  53
  54     { BUILTIN_ALIAS_RID_ACCOUNT_OPS  , "Account Operators" },
  55     { BUILTIN_ALIAS_RID_SYSTEM_OPS   , "System Operators" },
  56     { BUILTIN_ALIAS_RID_PRINT_OPS    , "Print Operators" },
  57     { BUILTIN_ALIAS_RID_BACKUP_OPS   , "Backup Operators" },
  58     { BUILTIN_ALIAS_RID_REPLICATOR   , "Replicator" },
  59     { 0                             , NULL }
  60 };
  61
  62 /* array lookup of well-known Domain RID users. */
  63 rid_name domain_user_rids[] =
  64 {
  65     { DOMAIN_USER_RID_ADMIN         , "Administrator" },
  66     { DOMAIN_USER_RID_GUEST         , "Guest" },
  67     { 0                             , NULL }
  68 };
  69
  70 /* array lookup of well-known Domain RID groups. */
  71 rid_name domain_group_rids[] =
  72 {
  73     { DOMAIN_GROUP_RID_ADMINS       , "Domain Admins" },
  74     { DOMAIN_GROUP_RID_USERS        , "Domain Users" },
  75     { DOMAIN_GROUP_RID_GUESTS       , "Domain Guests" },
  76     { 0                             , NULL }
  77 };
  78
  79 int make_dom_gids(TALLOC_CTX *ctx, char *gids_str, DOM_GID **ppgids)
  80 {
  81   char *ptr;
  82   pstring s2;
  83   int count;
  84   DOM_GID *gids;
  85
  86   *ppgids = NULL;
  87
  88   DEBUG(4,("make_dom_gids: %s\n", gids_str));
  89
  90   if (gids_str == NULL || *gids_str == 0)
  91     return 0;
  92
  93   for (count = 0, ptr = gids_str;
  94        next_token(&ptr, s2, NULL, sizeof(s2));
  95        count++)
  96     ;
  97
  98   gids = (DOM_GID *)talloc(ctx, sizeof(DOM_GID) * count );
  99   if(!gids)
 100   {
 101     DEBUG(0,("make_dom_gids: talloc fail !\n"));
 102     return 0;
 103   }
 104
 105   for (count = 0, ptr = gids_str;
 106        next_token(&ptr, s2, NULL, sizeof(s2)) &&
 107                count < LSA_MAX_GROUPS;
 108        count++)
 109   {
 110     /* the entries are of the form GID/ATTR, ATTR being optional.*/
 111     char *attr;
 112     uint32 rid = 0;
 113     int i;
 114
 115     attr = strchr_m(s2,'/');
 116     if (attr)
 117       *attr++ = 0;
 118
 119     if (!attr || !*attr)
 120       attr = "7"; /* default value for attribute is 7 */
 121
 122     /* look up the RID string and see if we can turn it into a rid number */
 123     for (i = 0; builtin_alias_rids[i].name != NULL; i++)
 124     {
 125       if (strequal(builtin_alias_rids[i].name, s2))
 126       {
 127         rid = builtin_alias_rids[i].rid;
 128         break;
 129       }
 130     }
 131
 132     if (rid == 0)
 133       rid = atoi(s2);
 134
 135     if (rid == 0)
 136     {
 137       DEBUG(1,("make_dom_gids: unknown well-known alias RID %s/%s\n", s2, attr));
 138       count--;
 139     }
 140     else
 141     {
 142       gids[count].g_rid = rid;
 143       gids[count].attr  = atoi(attr);
 144
 145       DEBUG(5,("group id: %d attr: %d\n", gids[count].g_rid, gids[count].attr));
 146     }
 147   }
 148
 149   *ppgids = gids;
 150   return count;
 151 }
 152
 153
 154 /*******************************************************************
 155  gets a domain user's groups
 156  ********************************************************************/
 157 void get_domain_user_groups(char *domain_groups, const char *user)
 158 {
 159         pstring tmp;
 160
 161         if (domain_groups == NULL || user == NULL) return;
 162
 163         /* can only be a user or a guest.  cannot be guest _and_ admin */
 164         if (user_in_list(user, lp_domain_guest_group()))
 165         {
 166                 slprintf(tmp, sizeof(tmp) - 1, " %ld/7 ", DOMAIN_GROUP_RID_GUESTS);
 167                 pstrcat(domain_groups, tmp);
 168
 169                 DEBUG(3,("domain guest group access %s granted\n", tmp));
 170         }
 171         else
 172         {
 173                 slprintf(tmp, sizeof(tmp) -1, " %ld/7 ", DOMAIN_GROUP_RID_USERS);
 174                 pstrcat(domain_groups, tmp);
 175
 176                 DEBUG(3,("domain group access %s granted\n", tmp));
 177
 178                 if (user_in_list(user, lp_domain_admin_group()))
 179                 {
 180                         slprintf(tmp, sizeof(tmp) - 1, " %ld/7 ", DOMAIN_GROUP_RID_ADMINS);
 181                         pstrcat(domain_groups, tmp);
 182
 183                         DEBUG(3,("domain admin group access %s granted\n", tmp));
 184                 }
 185         }
 186 }
 187
 188 /*******************************************************************
 189  Look up a local (domain) rid and return a name and type.
 190  ********************************************************************/
 191 NTSTATUS local_lookup_group_name(uint32 rid, char *group_name, uint32 *type)
 192 {
 193         int i = 0;
 194         (*type) = SID_NAME_DOM_GRP;
 195
 196         DEBUG(5,("lookup_group_name: rid: %d", rid));
 197
 198         while (domain_group_rids[i].rid != rid && domain_group_rids[i].rid != 0)
 199         {
 200                 i++;
 201         }
 202
 203         if (domain_group_rids[i].rid != 0)
 204         {
 205                 fstrcpy(group_name, domain_group_rids[i].name);
 206                 DEBUG(5,(" = %s\n", group_name));
 207                 return NT_STATUS_OK;
 208         }
 209
 210         DEBUG(5,(" none mapped\n"));
 211         return NT_STATUS_NONE_MAPPED;
 212 }
 213
 214 /*******************************************************************
 215  Look up a local alias rid and return a name and type.
 216  ********************************************************************/
 217 NTSTATUS local_lookup_alias_name(uint32 rid, char *alias_name, uint32 *type)
 218 {
 219         int i = 0;
 220         (*type) = SID_NAME_WKN_GRP;
 221
 222         DEBUG(5,("lookup_alias_name: rid: %d", rid));
 223
 224         while (builtin_alias_rids[i].rid != rid && builtin_alias_rids[i].rid != 0)
 225         {
 226                 i++;
 227         }
 228
 229         if (builtin_alias_rids[i].rid != 0)
 230         {
 231                 fstrcpy(alias_name, builtin_alias_rids[i].name);
 232                 DEBUG(5,(" = %s\n", alias_name));
 233                 return NT_STATUS_OK;
 234         }
 235
 236         DEBUG(5,(" none mapped\n"));
 237         return NT_STATUS_NONE_MAPPED;
 238 }
 239
 240 /*******************************************************************
 241  Look up a local user rid and return a name and type.
 242  ********************************************************************/
 243 NTSTATUS local_lookup_user_name(uint32 rid, char *user_name, uint32 *type)
 244 {
 245         SAM_ACCOUNT *sampwd=NULL;
 246         int i = 0;
 247         BOOL ret;
 248
 249         (*type) = SID_NAME_USER;
 250
 251         DEBUG(5,("lookup_user_name: rid: %d", rid));
 252
 253         /* look up the well-known domain user rids first */
 254         while (domain_user_rids[i].rid != rid && domain_user_rids[i].rid != 0)
 255         {
 256                 i++;
 257         }
 258
 259         if (domain_user_rids[i].rid != 0) {
 260                 fstrcpy(user_name, domain_user_rids[i].name);
 261                 DEBUG(5,(" = %s\n", user_name));
 262                 return NT_STATUS_OK;
 263         }
 264
 265         pdb_init_sam(&sampwd);
 266
 267         /* ok, it's a user.  find the user account */
 268         become_root();
 269         ret = pdb_getsampwrid(sampwd, rid);
 270         unbecome_root();
 271
 272         if (ret == True) {
 273                 fstrcpy(user_name, pdb_get_username(sampwd) );
 274                 DEBUG(5,(" = %s\n", user_name));
 275                 pdb_free_sam(&sampwd);
 276                 return NT_STATUS_OK;
 277         }
 278
 279         DEBUG(5,(" none mapped\n"));
 280         pdb_free_sam(&sampwd);
 281         return NT_STATUS_NONE_MAPPED;
 282 }
 283
 284 /*******************************************************************
 285  Look up a local (domain) group name and return a rid
 286  ********************************************************************/
 287 NTSTATUS local_lookup_group_rid(char *group_name, uint32 *rid)
 288 {
 289         char *grp_name;
 290         int i = -1; /* start do loop at -1 */
 291
 292         do /* find, if it exists, a group rid for the group name*/
 293         {
 294                 i++;
 295                 (*rid) = domain_group_rids[i].rid;
 296                 grp_name = domain_group_rids[i].name;
 297
 298         } while (grp_name != NULL && !strequal(grp_name, group_name));
 299
 300         return (grp_name != NULL) ? NT_STATUS_OK : NT_STATUS_NONE_MAPPED;
 301 }
 302
 303 /*******************************************************************
 304  Look up a local (BUILTIN) alias name and return a rid
 305  ********************************************************************/
 306 NTSTATUS local_lookup_alias_rid(char *alias_name, uint32 *rid)
 307 {
 308         char *als_name;
 309         int i = -1; /* start do loop at -1 */
 310
 311         do /* find, if it exists, a alias rid for the alias name*/
 312         {
 313                 i++;
 314                 (*rid) = builtin_alias_rids[i].rid;
 315                 als_name = builtin_alias_rids[i].name;
 316
 317         } while (als_name != NULL && !strequal(als_name, alias_name));
 318
 319         return (als_name != NULL) ? NT_STATUS_OK : NT_STATUS_NONE_MAPPED;
 320 }
 321
 322 /*******************************************************************
 323  Look up a local user name and return a rid
 324  ********************************************************************/
 325 NTSTATUS local_lookup_user_rid(char *user_name, uint32 *rid)
 326 {
 327         SAM_ACCOUNT *sampass=NULL;
 328         BOOL ret;
 329
 330         (*rid) = 0;
 331
 332         pdb_init_sam(&sampass);
 333
 334         /* find the user account */
 335         become_root();
 336         ret = pdb_getsampwnam(sampass, user_name);
 337         unbecome_root();
 338
 339         if (ret == True) {
 340                 (*rid) = pdb_get_user_rid(sampass);
 341                 pdb_free_sam(&sampass);
 342                 return NT_STATUS_OK;
 343         }
 344
 345         pdb_free_sam(&sampass);
 346         return NT_STATUS_NONE_MAPPED;
 347 }