source3/passdb/pdb_unix.c

   1 /*
   2  * Unix password backend for samba
   3  * Copyright (C) Jelmer Vernooij 2002
   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 /******************************************************************
  23   Lookup a name in the SAM database
  24  ******************************************************************/
  25
  26 static NTSTATUS unixsam_getsampwnam (struct pdb_methods *methods, SAM_ACCOUNT *user, const char *sname)
  27 {
  28         struct passwd *pass;
  29         if (!methods) {
  30                 DEBUG(0,("invalid methods\n"));
  31                 return NT_STATUS_UNSUCCESSFUL;
  32         }
  33         if (!sname) {
  34                 DEBUG(0,("invalid name specified"));
  35                 return NT_STATUS_UNSUCCESSFUL;
  36         }
  37         pass = Get_Pwnam(sname);
  38
  39         return pdb_fill_sam_pw(user, pass);
  40 }
  41
  42
  43 /***************************************************************************
  44   Search by rid
  45  **************************************************************************/
  46
  47 static NTSTATUS unixsam_getsampwrid (struct pdb_methods *methods,
  48                                  SAM_ACCOUNT *user, uint32 rid)
  49 {
  50         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
  51         struct passwd *pass = NULL;
  52         const char *guest_account = lp_guestaccount();
  53         if (!(guest_account && *guest_account)) {
  54                 DEBUG(1, ("NULL guest account!?!?\n"));
  55                 return nt_status;
  56         }
  57
  58         if (!methods) {
  59                 DEBUG(0,("invalid methods\n"));
  60                 return nt_status;
  61         }
  62
  63         if (rid == DOMAIN_USER_RID_GUEST) {
  64                 pass = getpwnam_alloc(guest_account);
  65                 if (!pass) {
  66                         DEBUG(1, ("guest account %s does not seem to exist...\n", guest_account));
  67                         return nt_status;
  68                 }
  69         } else if (pdb_rid_is_user(rid)) {
  70                 pass = getpwuid_alloc(fallback_pdb_user_rid_to_uid (rid));
  71         }
  72
  73         if (pass == NULL) {
  74                 return nt_status;
  75         }
  76
  77         nt_status = pdb_fill_sam_pw(user, pass);
  78         passwd_free(&pass);
  79
  80         return nt_status;
  81 }
  82
  83 static NTSTATUS unixsam_getsampwsid(struct pdb_methods *my_methods, SAM_ACCOUNT * user, const DOM_SID *sid)
  84 {
  85         uint32 rid;
  86         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid))
  87                 return NT_STATUS_UNSUCCESSFUL;
  88         return unixsam_getsampwrid(my_methods, user, rid);
  89 }
  90
  91 /***************************************************************************
  92   Updates a SAM_ACCOUNT
  93
  94   This isn't a particulary practical option for pdb_unix.  We certainly don't
  95   want to twidde the filesystem, so what should we do?
  96
  97   Current plan is to transparently add the account.  It should appear
  98   as if the pdb_unix version was modified, but its actually stored somehwere.
  99  ****************************************************************************/
 100
 101 static NTSTATUS unixsam_update_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *newpwd)
 102 {
 103         return methods->parent->pdb_add_sam_account(methods->parent, newpwd);
 104 }
 105
 106 NTSTATUS pdb_init_unixsam(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, const char *location)
 107 {
 108         NTSTATUS nt_status;
 109
 110         if (!pdb_context) {
 111                 DEBUG(0, ("invalid pdb_context specified\n"));
 112                 return NT_STATUS_UNSUCCESSFUL;
 113         }
 114
 115         if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods(pdb_context->mem_ctx, pdb_method))) {
 116                 return nt_status;
 117         }
 118
 119         (*pdb_method)->name = "unixsam";
 120         (*pdb_method)->update_sam_account = unixsam_update_sam_account;
 121         (*pdb_method)->getsampwnam = unixsam_getsampwnam;
 122         (*pdb_method)->getsampwsid = unixsam_getsampwsid;
 123
 124         /* There's not very much to initialise here */
 125         return NT_STATUS_OK;
 126 }
 127
 128 int pdb_unix_init(void)
 129 {
 130         return smb_register_passdb("unixsam", pdb_init_unixsam, PASSDB_INTERFACE_VERSION);
 131 }