source3/auth/auth_unix.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Password and authentication handling
   4    Copyright (C) Andrew Bartlett              2001
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "../librpc/gen_ndr/samr.h"
  22
  23 #undef DBGC_CLASS
  24 #define DBGC_CLASS DBGC_AUTH
  25
  26 /** Check a plaintext username/password
  27  *
  28  * Cannot deal with an encrupted password in any manner whatsoever,
  29  * unless the account has a null password.
  30  **/
  31
  32 static NTSTATUS check_unix_security(const struct auth_context *auth_context,
  33                              void *my_private_data,
  34                              TALLOC_CTX *mem_ctx,
  35                              const struct auth_usersupplied_info *user_info,
  36                              struct auth_serversupplied_info **server_info)
  37 {
  38         NTSTATUS nt_status;
  39         struct passwd *pass = NULL;
  40         const char *rhost;
  41         char addr[INET6_ADDRSTRLEN];
  42
  43         DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
  44
  45         become_root();
  46         pass = Get_Pwnam_alloc(talloc_tos(), user_info->mapped.account_name);
  47
  48         rhost = client_name(smbd_server_fd());
  49         if (strequal(rhost,"UNKNOWN"))
  50                 rhost = client_addr(smbd_server_fd(), addr, sizeof(addr));
  51
  52         /** @todo This call assumes a ASCII password, no charset transformation is
  53             done.  We may need to revisit this **/
  54         nt_status = pass_check(pass,
  55                                 pass ? pass->pw_name : user_info->mapped.account_name,
  56                                rhost,
  57                                 user_info->password.plaintext,
  58                                 true);
  59
  60         unbecome_root();
  61
  62         if (NT_STATUS_IS_OK(nt_status)) {
  63                 if (pass) {
  64                         make_server_info_pw(server_info, pass->pw_name, pass);
  65                 } else {
  66                         /* we need to do somthing more useful here */
  67                         nt_status = NT_STATUS_NO_SUCH_USER;
  68                 }
  69         }
  70
  71         TALLOC_FREE(pass);
  72         return nt_status;
  73 }
  74
  75 /* module initialisation */
  76 static NTSTATUS auth_init_unix(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
  77 {
  78         struct auth_methods *result;
  79
  80         result = TALLOC_ZERO_P(auth_context, struct auth_methods);
  81         if (result == NULL) {
  82                 return NT_STATUS_NO_MEMORY;
  83         }
  84         result->name = "unix";
  85         result->auth = check_unix_security;
  86
  87         *auth_method = result;
  88         return NT_STATUS_OK;
  89 }
  90
  91 NTSTATUS auth_unix_init(void)
  92 {
  93         return smb_register_auth(AUTH_INTERFACE_VERSION, "unix", auth_init_unix);
  94 }