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 2 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, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 /* Prototypes from common.h */
  30
  31 NSS_STATUS winbindd_request(int req_type,
  32                             struct winbindd_request *request,
  33                             struct winbindd_response *response);
  34
  35 NTSTATUS get_info3_from_ndr(TALLOC_CTX *mem_ctx, struct winbindd_response *response, NET_USER_INFO_3 *info3)
  36 {
  37         uint8 *info3_ndr;
  38         size_t len = response->length - sizeof(response);
  39         prs_struct ps;
  40         if (len > 0) {
  41                 info3_ndr = response->extra_data;
  42                 if (!prs_init(&ps, len, mem_ctx, UNMARSHALL)) {
  43                         return NT_STATUS_NO_MEMORY;
  44                 }
  45                 prs_append_data(&ps, info3_ndr, len);
  46                 ps.data_offset = 0;
  47                 if (!net_io_user_info3("", info3, &ps, 1, 3)) {
  48                         DEBUG(2, ("get_info3_from_ndr: could not parse info3 struct!\n"));
  49                         return NT_STATUS_UNSUCCESSFUL;
  50                 }
  51                 prs_mem_free(&ps);
  52
  53                 return NT_STATUS_OK;
  54         } else {
  55                 DEBUG(2, ("get_info3_from_ndr: No info3 struct found!\n"));
  56                 return NT_STATUS_UNSUCCESSFUL;
  57         }
  58 }
  59
  60 /* Authenticate a user with a challenge/response */
  61
  62 static NTSTATUS check_winbind_security(const struct auth_context *auth_context,
  63                                        void *my_private_data,
  64                                        TALLOC_CTX *mem_ctx,
  65                                        const auth_usersupplied_info *user_info,
  66                                        auth_serversupplied_info **server_info)
  67 {
  68         struct winbindd_request request;
  69         struct winbindd_response response;
  70         NSS_STATUS result;
  71         NTSTATUS nt_status;
  72         NET_USER_INFO_3 info3;
  73
  74         if (!user_info) {
  75                 return NT_STATUS_INVALID_PARAMETER;
  76         }
  77
  78         if (!auth_context) {
  79                 DEBUG(3,("Password for user %s cannot be checked because we have no auth_info to get the challenge from.\n",
  80                          user_info->internal_username.str));
  81                 return NT_STATUS_UNSUCCESSFUL;
  82         }
  83
  84         /* Send off request */
  85
  86         ZERO_STRUCT(request);
  87         ZERO_STRUCT(response);
  88
  89         request.data.auth_crap.flags = WINBIND_PAM_INFO3_NDR;
  90
  91         push_utf8_fstring(request.data.auth_crap.user,
  92                           user_info->smb_name.str);
  93         push_utf8_fstring(request.data.auth_crap.domain,
  94                           user_info->domain.str);
  95         push_utf8_fstring(request.data.auth_crap.workstation,
  96                           user_info->wksta_name.str);
  97
  98         memcpy(request.data.auth_crap.chal, auth_context->challenge.data, sizeof(request.data.auth_crap.chal));
  99
 100         request.data.auth_crap.lm_resp_len = MIN(user_info->lm_resp.length,
 101                                                  sizeof(request.data.auth_crap.lm_resp));
 102         request.data.auth_crap.nt_resp_len = MIN(user_info->nt_resp.length,
 103                                                  sizeof(request.data.auth_crap.nt_resp));
 104
 105         memcpy(request.data.auth_crap.lm_resp, user_info->lm_resp.data,
 106                request.data.auth_crap.lm_resp_len);
 107         memcpy(request.data.auth_crap.nt_resp, user_info->nt_resp.data,
 108                request.data.auth_crap.nt_resp_len);
 109
 110         result = winbindd_request(WINBINDD_PAM_AUTH_CRAP, &request, &response);
 111
 112         nt_status = NT_STATUS(response.data.auth.nt_status);
 113
 114         if (result == NSS_STATUS_SUCCESS && response.extra_data) {
 115                 if (NT_STATUS_IS_OK(nt_status)) {
 116                         if (NT_STATUS_IS_OK(nt_status = get_info3_from_ndr(mem_ctx, &response, &info3))) {
 117                                 nt_status =
 118                                         make_server_info_info3(mem_ctx,
 119                                                                user_info->internal_username.str,
 120                                                                user_info->smb_name.str,
 121                                                                user_info->domain.str,
 122                                                                server_info,
 123                                                                &info3);
 124                         }
 125                 }
 126         } else if (NT_STATUS_IS_OK(nt_status)) {
 127                 nt_status = NT_STATUS_UNSUCCESSFUL;
 128         }
 129
 130         return nt_status;
 131 }
 132
 133 /* module initialisation */
 134 NTSTATUS auth_init_winbind(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
 135 {
 136         if (!make_auth_methods(auth_context, auth_method)) {
 137                 return NT_STATUS_NO_MEMORY;
 138         }
 139
 140         (*auth_method)->name = "winbind";
 141         (*auth_method)->auth = check_winbind_security;
 142         return NT_STATUS_OK;
 143 }