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 "auth.h"
  22 #include "system/passwd.h"
  23 #include "../librpc/gen_ndr/samr.h"
  24 #include "smbd/globals.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 /** Check a plaintext username/password
  30  *
  31  * Cannot deal with an encrupted password in any manner whatsoever,
  32  * unless the account has a null password.
  33  **/
  34
  35 static NTSTATUS check_unix_security(const struct auth_context *auth_context,
  36                              void *my_private_data,
  37                              TALLOC_CTX *mem_ctx,
  38                              const struct auth_usersupplied_info *user_info,
  39                              struct auth_serversupplied_info **server_info)
  40 {
  41         NTSTATUS nt_status;
  42         struct passwd *pass = NULL;
  43
  44         DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
  45
  46         become_root();
  47         pass = Get_Pwnam_alloc(talloc_tos(), user_info->mapped.account_name);
  48
  49         /** @todo This call assumes a ASCII password, no charset transformation is
  50             done.  We may need to revisit this **/
  51         nt_status = pass_check(pass,
  52                                 pass ? pass->pw_name : user_info->mapped.account_name,
  53                                smbd_server_conn->client_id.name,
  54                                 user_info->password.plaintext,
  55                                 true);
  56
  57         unbecome_root();
  58
  59         if (NT_STATUS_IS_OK(nt_status)) {
  60                 if (pass) {
  61                         make_server_info_pw(server_info, pass->pw_name, pass);
  62                 } else {
  63                         /* we need to do somthing more useful here */
  64                         nt_status = NT_STATUS_NO_SUCH_USER;
  65                 }
  66         }
  67
  68         TALLOC_FREE(pass);
  69         return nt_status;
  70 }
  71
  72 /* module initialisation */
  73 static NTSTATUS auth_init_unix(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
  74 {
  75         struct auth_methods *result;
  76
  77         result = TALLOC_ZERO_P(auth_context, struct auth_methods);
  78         if (result == NULL) {
  79                 return NT_STATUS_NO_MEMORY;
  80         }
  81         result->name = "unix";
  82         result->auth = check_unix_security;
  83
  84         *auth_method = result;
  85         return NT_STATUS_OK;
  86 }
  87
  88 NTSTATUS auth_unix_init(void)
  89 {
  90         return smb_register_auth(AUTH_INTERFACE_VERSION, "unix", auth_init_unix);
  91 }