source/groupdb/aliasfile.c

   1 /*
   2  * Unix SMB/Netbios implementation. Version 1.9. SMB parameters and setup
   3  * Copyright (C) Andrew Tridgell 1992-1998 Modified by Jeremy Allison 1995.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License as published by the Free
   7  * Software Foundation; either version 2 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 675
  17  * Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include "includes.h"
  21
  22 #ifdef USE_SMBGROUP_DB
  23
  24 static int al_file_lock_depth = 0;
  25 extern int DEBUGLEVEL;
  26
  27 static char s_readbuf[1024];
  28
  29 /***************************************************************
  30  Start to enumerate the aliasdb list. Returns a void pointer
  31  to ensure no modification outside this module.
  32 ****************************************************************/
  33
  34 static void *startalsfilepwent(BOOL update)
  35 {
  36         return startfileent(lp_smb_alias_file(),
  37                               s_readbuf, sizeof(s_readbuf),
  38                               &al_file_lock_depth, update);
  39 }
  40
  41 /***************************************************************
  42  End enumeration of the aliasdb list.
  43 ****************************************************************/
  44
  45 static void endalsfilepwent(void *vp)
  46 {
  47         endfileent(vp, &al_file_lock_depth);
  48 }
  49
  50 /*************************************************************************
  51  Return the current position in the aliasdb list as an SMB_BIG_UINT.
  52  This must be treated as an opaque token.
  53 *************************************************************************/
  54 static SMB_BIG_UINT getalsfilepwpos(void *vp)
  55 {
  56         return getfilepwpos(vp);
  57 }
  58
  59 /*************************************************************************
  60  Set the current position in the aliasdb list from an SMB_BIG_UINT.
  61  This must be treated as an opaque token.
  62 *************************************************************************/
  63 static BOOL setalsfilepwpos(void *vp, SMB_BIG_UINT tok)
  64 {
  65         return setfilepwpos(vp, tok);
  66 }
  67
  68
  69 /*************************************************************************
  70  Routine to return the next entry in the smbdomainalias list.
  71  *************************************************************************/
  72 static char *get_alias_members(char *p, int *num_mem, LOCAL_GRP_MEMBER **members)
  73 {
  74         fstring name;
  75
  76         if (num_mem == NULL || members == NULL)
  77         {
  78                 return NULL;
  79         }
  80
  81         (*num_mem) = 0;
  82         (*members) = NULL;
  83
  84         while (next_token(&p, name, ",", sizeof(fstring)))
  85         {
  86                 DOM_SID sid;
  87                 uint8 type;
  88                 BOOL found = False;
  89
  90                 if (strnequal(name, "S-", 2))
  91                 {
  92                         /* sid entered directly */
  93                         string_to_sid(&sid, name);
  94                         found = lookup_sid(&sid, name, &type) == 0x0;
  95                 }
  96                 else
  97                 {
  98                         found = lookup_name(name, &sid, &type) == 0x0;
  99                 }
 100
 101                 if (!found)
 102                 {
 103                         DEBUG(0,("alias database: could not resolve alias named %s\n", name));
 104                         continue;
 105                 }
 106
 107                 (*members) = Realloc((*members), ((*num_mem)+1) * sizeof(LOCAL_GRP_MEMBER));
 108
 109                 if ((*members) == NULL)
 110                 {
 111                         return NULL;
 112                 }
 113
 114                 fstrcpy((*members)[*num_mem].name, name);
 115                 (*members)[*num_mem].sid_use = type;
 116                 sid_copy(&(*members)[*num_mem].sid, &sid);
 117                 (*num_mem)++;
 118         }
 119         return p;
 120 }
 121
 122 /*************************************************************************
 123  Routine to return the next entry in the smbdomainalias list.
 124  *************************************************************************/
 125 static LOCAL_GRP *getalsfilepwent(void *vp, LOCAL_GRP_MEMBER **mem, int *num_mem)
 126 {
 127         /* Static buffers we will return. */
 128         static LOCAL_GRP al_buf;
 129
 130         int gidval;
 131
 132         pstring linebuf;
 133         char  *p;
 134         uint8 type;
 135
 136         aldb_init_als(&al_buf);
 137
 138         /*
 139          * Scan the file, a line at a time and check if the name matches.
 140          */
 141         while (getfileline(vp, linebuf, sizeof(linebuf)) > 0)
 142         {
 143                 DOM_NAME_MAP gmep;
 144
 145                 /* get alias name */
 146
 147                 p = strncpyn(al_buf.name, linebuf, sizeof(al_buf.name), ':');
 148                 if (p == NULL)
 149                 {
 150                         DEBUG(0, ("getalsfilepwent: malformed alias entry (no :)\n"));
 151                         continue;
 152                 }
 153
 154                 /* Go past ':' */
 155                 p++;
 156
 157                 /* get alias comment */
 158
 159                 p = strncpyn(al_buf.comment, p, sizeof(al_buf.comment), ':');
 160                 if (p == NULL)
 161                 {
 162                         DEBUG(0, ("getalsfilepwent: malformed alias entry (no :)\n"));
 163                         continue;
 164                 }
 165
 166                 /* Go past ':' */
 167                 p++;
 168
 169                 /* Get alias gid. */
 170
 171                 p = Atoic(p, &gidval, ":");
 172
 173                 if (p == NULL)
 174                 {
 175                         DEBUG(0, ("getalsfilepwent: malformed alias entry (no : after uid)\n"));
 176                         continue;
 177                 }
 178
 179                 /* Go past ':' */
 180                 p++;
 181
 182                 /* now get the user's aliases.  there are a maximum of 32 */
 183
 184                 if (mem != NULL && num_mem != NULL)
 185                 {
 186                         (*mem) = NULL;
 187                         (*num_mem) = 0;
 188
 189                         p = get_alias_members(p, num_mem, mem);
 190                         if (p == NULL)
 191                         {
 192                                 DEBUG(0, ("getalsfilepwent: malformed alias entry (no : after members)\n"));
 193                         }
 194                 }
 195
 196                 /*
 197                  * look up the gid, turn it into a rid.  the _correct_ type of rid */
 198                  */
 199
 200                 if (!lookupsmbgrpgid((gid_t)gidval, &gmep))
 201                 {
 202                         continue;
 203                 }
 204                 if (gmep.type != SID_NAME_DOM_GRP &&
 205                     gmep.type != SID_NAME_WKN_GRP))
 206                 {
 207                         continue;
 208                 }
 209
 210                 sid_split_rid(&gmep.sid, &gp_buf.rid);
 211                 if (!sid_equal(&gmep.sid, &global_sam_sid))
 212                 {
 213                         continue;
 214                 }
 215
 216                 make_alias_line(linebuf, sizeof(linebuf), &al_buf, mem, num_mem);
 217                 DEBUG(10,("line: '%s'\n", linebuf));
 218
 219                 return &al_buf;
 220         }
 221
 222         DEBUG(5,("getalsfilepwent: end of file reached.\n"));
 223         return NULL;
 224 }
 225
 226 /************************************************************************
 227  Routine to add an entry to the aliasdb file.
 228 *************************************************************************/
 229
 230 static BOOL add_alsfileals_entry(LOCAL_GRP *newals)
 231 {
 232         DEBUG(0, ("add_alsfileals_entry: NOT IMPLEMENTED\n"));
 233         return False;
 234 }
 235
 236 /************************************************************************
 237  Routine to search the aliasdb file for an entry matching the aliasname.
 238  and then modify its alias entry.
 239 ************************************************************************/
 240
 241 static BOOL mod_alsfileals_entry(LOCAL_GRP* als)
 242 {
 243         DEBUG(0, ("mod_alsfileals_entry: NOT IMPLEMENTED\n"));
 244         return False;
 245 }
 246
 247
 248 static struct aliasdb_ops file_ops =
 249 {
 250         startalsfilepwent,
 251         endalsfilepwent,
 252         getalsfilepwpos,
 253         setalsfilepwpos,
 254
 255         iterate_getaliasntnam,          /* In aliasdb.c */
 256         iterate_getaliasgid,          /* In aliasdb.c */
 257         iterate_getaliasrid,          /* In aliasdb.c */
 258         getalsfilepwent,
 259
 260         add_alsfileals_entry,
 261         mod_alsfileals_entry,
 262
 263         iterate_getuseraliasntnam      /* in aliasdb.c */
 264 };
 265
 266 struct aliasdb_ops *file_initialise_alias_db(void)
 267 {
 268         return &file_ops;
 269 }
 270
 271 #else
 272  /* Do *NOT* make this function static. It breaks the compile on gcc. JRA */
 273  void als_dummy_function(void) { } /* stop some compilers complaining */
 274 #endif /* USE_SMBPASS_DB */