source3/auth/auth_samba4.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authenticate against Samba4's auth subsystem
   4    Copyright (C) Volker Lendecke 2008
   5    Copyright (C) Andrew Bartlett 2010
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "source3/include/auth.h"
  23 #include "source4/auth/auth.h"
  24 #include "auth/auth_sam_reply.h"
  25 #include "param/param.h"
  26 #include "source4/lib/events/events.h"
  27
  28 #undef DBGC_CLASS
  29 #define DBGC_CLASS DBGC_AUTH
  30
  31 static NTSTATUS check_samba4_security(const struct auth_context *auth_context,
  32                                       void *my_private_data,
  33                                       TALLOC_CTX *mem_ctx,
  34                                       const struct auth_usersupplied_info *user_info,
  35                                       struct auth_serversupplied_info **server_info)
  36 {
  37         TALLOC_CTX *frame = talloc_stackframe();
  38         struct netr_SamInfo3 *info3 = NULL;
  39         NTSTATUS nt_status;
  40         struct auth_user_info_dc *user_info_dc;
  41         struct auth4_context *auth4_context;
  42         struct loadparm_context *lp_ctx;
  43
  44         lp_ctx = loadparm_init_s3(frame, loadparm_s3_context());
  45         if (lp_ctx == NULL) {
  46                 DEBUG(10, ("loadparm_init_s3 failed\n"));
  47                 talloc_free(frame);
  48                 return NT_STATUS_INVALID_SERVER_STATE;
  49         }
  50
  51         /* We create a private tevent context here to avoid nested loops in
  52          * the s3 one, as that may not be expected */
  53         nt_status = auth_context_create(mem_ctx,
  54                                         s4_event_context_init(frame), NULL,
  55                                         lp_ctx,
  56                                         &auth4_context);
  57         NT_STATUS_NOT_OK_RETURN(nt_status);
  58
  59         nt_status = auth_context_set_challenge(auth4_context, auth_context->challenge.data, "auth_samba4");
  60         NT_STATUS_NOT_OK_RETURN_AND_FREE(nt_status, auth4_context);
  61
  62         nt_status = auth_check_password(auth4_context, auth4_context, user_info, &user_info_dc);
  63         NT_STATUS_NOT_OK_RETURN_AND_FREE(nt_status, auth4_context);
  64
  65         nt_status = auth_convert_user_info_dc_saminfo3(mem_ctx,
  66                                                        user_info_dc,
  67                                                        &info3);
  68         if (NT_STATUS_IS_OK(nt_status)) {
  69                 /* We need the strings from the server_info to be valid as long as the info3 is around */
  70                 talloc_steal(info3, user_info_dc);
  71         }
  72         talloc_free(auth4_context);
  73
  74         if (!NT_STATUS_IS_OK(nt_status)) {
  75                 goto done;
  76         }
  77
  78         nt_status = make_server_info_info3(mem_ctx, user_info->client.account_name,
  79                                            user_info->mapped.domain_name, server_info,
  80                                         info3);
  81         if (!NT_STATUS_IS_OK(nt_status)) {
  82                 DEBUG(10, ("make_server_info_info3 failed: %s\n",
  83                            nt_errstr(nt_status)));
  84                 TALLOC_FREE(frame);
  85                 return nt_status;
  86         }
  87
  88         nt_status = NT_STATUS_OK;
  89
  90  done:
  91         TALLOC_FREE(frame);
  92         return nt_status;
  93 }
  94
  95 /* module initialisation */
  96 static NTSTATUS auth_init_samba4(struct auth_context *auth_context,
  97                                     const char *param,
  98                                     auth_methods **auth_method)
  99 {
 100         struct auth_methods *result;
 101
 102         result = talloc_zero(auth_context, struct auth_methods);
 103         if (result == NULL) {
 104                 return NT_STATUS_NO_MEMORY;
 105         }
 106         result->name = "samba4";
 107         result->auth = check_samba4_security;
 108
 109         *auth_method = result;
 110         return NT_STATUS_OK;
 111 }
 112
 113 NTSTATUS auth_samba4_init(void)
 114 {
 115         smb_register_auth(AUTH_INTERFACE_VERSION, "samba4",
 116                           auth_init_samba4);
 117         return NT_STATUS_OK;
 118 }