source3/passdb/smbpassgroup.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_SMBPASS_DB
  23
  24 static int grp_file_lock_depth = 0;
  25 extern int DEBUGLEVEL;
  26
  27 /***************************************************************
  28  Start to enumerate the smbpasswd list. Returns a void pointer
  29  to ensure no modification outside this module.
  30 ****************************************************************/
  31
  32 static void *startsmbfilegrpent(BOOL update)
  33 {
  34         static char s_readbuf[1024];
  35         return startfilepwent(lp_smb_passgrp_file(), s_readbuf, sizeof(s_readbuf),
  36                               &grp_file_lock_depth, update);
  37 }
  38
  39 /***************************************************************
  40  End enumeration of the smbpasswd list.
  41 ****************************************************************/
  42
  43 static void endsmbfilegrpent(void *vp)
  44 {
  45         endfilepwent(vp, &grp_file_lock_depth);
  46 }
  47
  48 /*************************************************************************
  49  Return the current position in the smbpasswd list as an SMB_BIG_UINT.
  50  This must be treated as an opaque token.
  51 *************************************************************************/
  52
  53 static SMB_BIG_UINT getsmbfilegrppos(void *vp)
  54 {
  55         return getfilepwpos(vp);
  56 }
  57
  58 /*************************************************************************
  59  Set the current position in the smbpasswd list from an SMB_BIG_UINT.
  60  This must be treated as an opaque token.
  61 *************************************************************************/
  62
  63 static BOOL setsmbfilegrppos(void *vp, SMB_BIG_UINT tok)
  64 {
  65         return setfilepwpos(vp, tok);
  66 }
  67
  68 /*************************************************************************
  69  Routine to return the next entry in the smbpasswd list.
  70  *************************************************************************/
  71 static struct smb_passwd *getsmbfilegrpent(void *vp,
  72                 uint32 **grp_rids, int *num_grps,
  73                 uint32 **als_rids, int *num_alss)
  74 {
  75         /* Static buffers we will return. */
  76         static struct smb_passwd pw_buf;
  77         static pstring  user_name;
  78         struct passwd *pwfile;
  79         pstring         linebuf;
  80         unsigned char  *p;
  81         int            uidval;
  82         size_t            linebuf_len;
  83
  84         if (vp == NULL)
  85         {
  86                 DEBUG(0,("getsmbfilegrpent: Bad password file pointer.\n"));
  87                 return NULL;
  88         }
  89
  90         pwdb_init_smb(&pw_buf);
  91
  92         /*
  93          * Scan the file, a line at a time.
  94          */
  95         while ((linebuf_len = getfileline(vp, linebuf, sizeof(linebuf))) > 0)
  96         {
  97                 /*
  98                  * The line we have should be of the form :-
  99                  *
 100                  * username:uid:domainrid1,domainrid2..:aliasrid1,aliasrid2..:
 101                  */
 102
 103                 /*
 104                  * As 256 is shorter than a pstring we don't need to check
 105                  * length here - if this ever changes....
 106                  */
 107                 p = strncpyn(user_name, linebuf, sizeof(user_name), ':');
 108
 109                 /* Go past ':' */
 110                 p++;
 111
 112                 /* Get smb uid. */
 113
 114                 p = Atoic((char *) p, &uidval, ":");
 115
 116                 pw_buf.smb_name = user_name;
 117                 pw_buf.smb_userid = uidval;
 118
 119                 /*
 120                  * Now get the password value - this should be 32 hex digits
 121                  * which are the ascii representations of a 16 byte string.
 122                  * Get two at a time and put them into the password.
 123                  */
 124
 125                 /* Skip the ':' */
 126                 p++;
 127
 128                 if (grp_rids != NULL && num_grps != NULL)
 129                 {
 130                         int i;
 131                         p = get_numlist(p, grp_rids, num_grps);
 132                         if (p == NULL)
 133                         {
 134                                 DEBUG(0,("getsmbfilegrpent: invalid line\n"));
 135                                 return NULL;
 136                         }
 137                         for (i = 0; i < (*num_grps); i++)
 138                         {
 139                                 (*grp_rids)[i] = pwdb_gid_to_group_rid((*grp_rids)[i]);
 140                         }
 141                 }
 142
 143                 /* Skip the ':' */
 144                 p++;
 145
 146                 if (als_rids != NULL && num_alss != NULL)
 147                 {
 148                         int i;
 149                         p = get_numlist(p, als_rids, num_alss);
 150                         if (p == NULL)
 151                         {
 152                                 DEBUG(0,("getsmbfilegrpent: invalid line\n"));
 153                                 return NULL;
 154                         }
 155                         for (i = 0; i < (*num_alss); i++)
 156                         {
 157                                 (*als_rids)[i] = pwdb_gid_to_alias_rid((*als_rids)[i]);
 158                         }
 159                 }
 160
 161                 pwfile = Get_Pwnam(pw_buf.smb_name, False);
 162                 if (pwfile == NULL)
 163                 {
 164                         DEBUG(0,("getsmbfilegrpent: smbpasswd database is corrupt!\n"));
 165                         DEBUG(0,("getsmbfilegrpent: username %s not in unix passwd database!\n", pw_buf.smb_name));
 166                         return NULL;
 167                 }
 168
 169                 return &pw_buf;
 170         }
 171
 172         DEBUG(5,("getsmbfilegrpent: end of file reached.\n"));
 173         return NULL;
 174 }
 175
 176 static struct passgrp_ops file_ops =
 177 {
 178         startsmbfilegrpent,
 179         endsmbfilegrpent,
 180         getsmbfilegrppos,
 181         setsmbfilegrppos,
 182         iterate_getsmbgrpnam,          /* In passgrp.c */
 183         iterate_getsmbgrpuid,          /* In passgrp.c */
 184         iterate_getsmbgrprid,          /* In passgrp.c */
 185         getsmbfilegrpent,
 186 };
 187
 188 struct passgrp_ops *file_initialise_password_grp(void)
 189 {
 190   return &file_ops;
 191 }
 192
 193 #else
 194  /* Do *NOT* make this function static. It breaks the compile on gcc. JRA */
 195  void smbpass_dummy_function(void) { } /* stop some compilers complaining */
 196 #endif /* USE_SMBPASS_DB */