source3/auth/auth_winbind.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind authentication mechnism
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Andrew Bartlett 2001 - 2002
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24
  25 #undef DBGC_CLASS
  26 #define DBGC_CLASS DBGC_AUTH
  27
  28 /* Authenticate a user with a challenge/response */
  29
  30 static NTSTATUS check_winbind_security(const struct auth_context *auth_context,
  31                                        void *my_private_data,
  32                                        TALLOC_CTX *mem_ctx,
  33                                        const auth_usersupplied_info *user_info,
  34                                        auth_serversupplied_info **server_info)
  35 {
  36         NTSTATUS nt_status;
  37         wbcErr wbc_status;
  38         struct wbcAuthUserParams params;
  39         struct wbcAuthUserInfo *info = NULL;
  40         struct wbcAuthErrorInfo *err = NULL;
  41
  42         if (!user_info) {
  43                 return NT_STATUS_INVALID_PARAMETER;
  44         }
  45
  46         if (!auth_context) {
  47                 DEBUG(3,("Password for user %s cannot be checked because we have no auth_info to get the challenge from.\n",
  48                          user_info->internal_username));
  49                 return NT_STATUS_INVALID_PARAMETER;
  50         }
  51
  52         if (strequal(user_info->domain, get_global_sam_name())) {
  53                 DEBUG(3,("check_winbind_security: Not using winbind, requested domain [%s] was for this SAM.\n",
  54                         user_info->domain));
  55                 return NT_STATUS_NOT_IMPLEMENTED;
  56         }
  57
  58         /* Send off request */
  59
  60         params.account_name     = user_info->smb_name;
  61         params.domain_name      = user_info->domain;
  62         params.workstation_name = user_info->wksta_name;
  63
  64         params.flags            = 0;
  65         params.parameter_control= user_info->logon_parameters;
  66
  67         params.level            = WBC_AUTH_USER_LEVEL_RESPONSE;
  68
  69         memcpy(params.password.response.challenge,
  70                auth_context->challenge.data,
  71                sizeof(params.password.response.challenge));
  72
  73         params.password.response.nt_length      = user_info->nt_resp.length;
  74         params.password.response.nt_data        = user_info->nt_resp.data;
  75         params.password.response.lm_length      = user_info->lm_resp.length;
  76         params.password.response.lm_data        = user_info->lm_resp.data;
  77
  78         /* we are contacting the privileged pipe */
  79         become_root();
  80         wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
  81         unbecome_root();
  82
  83         if (!WBC_ERROR_IS_OK(wbc_status)) {
  84                 DEBUG(10,("check_winbind_security: wbcAuthenticateUserEx failed: %s\n",
  85                         wbcErrorString(wbc_status)));
  86         }
  87
  88         if (wbc_status == WBC_ERR_NO_MEMORY) {
  89                 return NT_STATUS_NO_MEMORY;
  90         }
  91
  92         if (wbc_status == WBC_ERR_WINBIND_NOT_AVAILABLE) {
  93                 struct auth_methods *auth_method =
  94                         (struct auth_methods *)my_private_data;
  95
  96                 if ( auth_method )
  97                         return auth_method->auth(auth_context, auth_method->private_data,
  98                                 mem_ctx, user_info, server_info);
  99                 else
 100                         /* log an error since this should not happen */
 101                         DEBUG(0,("check_winbind_security: ERROR!  my_private_data == NULL!\n"));
 102         }
 103
 104         if (wbc_status == WBC_ERR_AUTH_ERROR) {
 105                 nt_status = NT_STATUS(err->nt_status);
 106                 wbcFreeMemory(err);
 107                 return nt_status;
 108         }
 109
 110         if (!WBC_ERROR_IS_OK(wbc_status)) {
 111                 return NT_STATUS_LOGON_FAILURE;
 112         }
 113
 114         nt_status = make_server_info_wbcAuthUserInfo(mem_ctx,
 115                                                      user_info->smb_name,
 116                                                      user_info->domain,
 117                                                      info, server_info);
 118         wbcFreeMemory(info);
 119         if (!NT_STATUS_IS_OK(nt_status)) {
 120                 return nt_status;
 121         }
 122
 123         (*server_info)->nss_token |= user_info->was_mapped;
 124
 125         return nt_status;
 126 }
 127
 128 /* module initialisation */
 129 static NTSTATUS auth_init_winbind(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
 130 {
 131         if (!make_auth_methods(auth_context, auth_method)) {
 132                 return NT_STATUS_NO_MEMORY;
 133         }
 134
 135         (*auth_method)->name = "winbind";
 136         (*auth_method)->auth = check_winbind_security;
 137
 138         if (param && *param) {
 139                 /* we load the 'fallback' module - if winbind isn't here, call this
 140                    module */
 141                 auth_methods *priv;
 142                 if (!load_auth_module(auth_context, param, &priv)) {
 143                         return NT_STATUS_UNSUCCESSFUL;
 144                 }
 145                 (*auth_method)->private_data = (void *)priv;
 146         }
 147         return NT_STATUS_OK;
 148 }
 149
 150 NTSTATUS auth_winbind_init(void)
 151 {
 152         return smb_register_auth(AUTH_INTERFACE_VERSION, "winbind", auth_init_winbind);
 153 }