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 "../lib/tsocket/tsocket.h"
  24
  25 #undef DBGC_CLASS
  26 #define DBGC_CLASS DBGC_AUTH
  27
  28 /** Check a plaintext username/password
  29  *
  30  * Cannot deal with an encrupted password in any manner whatsoever,
  31  * unless the account has a null password.
  32  **/
  33
  34 static NTSTATUS check_unix_security(const struct auth_context *auth_context,
  35                              void *my_private_data,
  36                              TALLOC_CTX *mem_ctx,
  37                              const struct auth_usersupplied_info *user_info,
  38                              struct auth_serversupplied_info **server_info)
  39 {
  40         NTSTATUS nt_status;
  41         struct passwd *pass = NULL;
  42         const char *rhost;
  43
  44         DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
  45
  46         if (tsocket_address_is_inet(user_info->remote_host, "ip")) {
  47                 rhost = tsocket_address_inet_addr_string(user_info->remote_host,
  48                                                          talloc_tos());
  49                 if (rhost == NULL) {
  50                         return NT_STATUS_NO_MEMORY;
  51                 }
  52         } else {
  53                 rhost = "127.0.0.1";
  54         }
  55
  56         become_root();
  57         pass = Get_Pwnam_alloc(talloc_tos(), user_info->mapped.account_name);
  58
  59         /** @todo This call assumes a ASCII password, no charset transformation is
  60             done.  We may need to revisit this **/
  61         nt_status = pass_check(pass,
  62                                 pass ? pass->pw_name : user_info->mapped.account_name,
  63                                 rhost,
  64                                 user_info->password.plaintext,
  65                                 true);
  66
  67         unbecome_root();
  68
  69         if (NT_STATUS_IS_OK(nt_status)) {
  70                 if (pass) {
  71                         make_server_info_pw(server_info, pass->pw_name, pass);
  72                 } else {
  73                         /* we need to do somthing more useful here */
  74                         nt_status = NT_STATUS_NO_SUCH_USER;
  75                 }
  76         }
  77
  78         TALLOC_FREE(pass);
  79         return nt_status;
  80 }
  81
  82 /* module initialisation */
  83 static NTSTATUS auth_init_unix(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
  84 {
  85         struct auth_methods *result;
  86
  87         result = talloc_zero(auth_context, struct auth_methods);
  88         if (result == NULL) {
  89                 return NT_STATUS_NO_MEMORY;
  90         }
  91         result->name = "unix";
  92         result->auth = check_unix_security;
  93
  94         *auth_method = result;
  95         return NT_STATUS_OK;
  96 }
  97
  98 NTSTATUS auth_unix_init(void)
  99 {
 100         return smb_register_auth(AUTH_INTERFACE_VERSION, "unix", auth_init_unix);
 101 }