source3/rpc_server/dcesrv_auth_generic.c

   1 /*
   2  *  NTLMSSP Acceptor
   3  *  DCERPC Server functions
   4  *  Copyright (C) Simo Sorce 2010.
   5  *  Copyright (C) Andrew Bartlett 2011.
   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
  22 #include "includes.h"
  23 #include "rpc_server/dcesrv_auth_generic.h"
  24 #include "auth.h"
  25 #include "auth/gensec/gensec.h"
  26
  27 static NTSTATUS auth_generic_server_authtype_start_as_root(TALLOC_CTX *mem_ctx,
  28                                                            uint8_t auth_type, uint8_t auth_level,
  29                                                            DATA_BLOB *token_in,
  30                                                            DATA_BLOB *token_out,
  31                                                            const struct tsocket_address *remote_address,
  32                                                            struct gensec_security **ctx)
  33 {
  34         struct gensec_security *gensec_security = NULL;
  35         NTSTATUS status;
  36
  37         status = auth_generic_prepare(talloc_tos(), remote_address, &gensec_security);
  38         if (!NT_STATUS_IS_OK(status)) {
  39                 DEBUG(0, (__location__ ": auth_generic_prepare failed: %s\n",
  40                           nt_errstr(status)));
  41                 return status;
  42         }
  43
  44         status = gensec_start_mech_by_authtype(gensec_security, auth_type, auth_level);
  45         if (!NT_STATUS_IS_OK(status)) {
  46                 DEBUG(0, (__location__ ": auth_generic_start failed: %s\n",
  47                           nt_errstr(status)));
  48                 TALLOC_FREE(gensec_security);
  49                 return status;
  50         }
  51
  52         status = gensec_update(gensec_security, mem_ctx, *token_in, token_out);
  53         if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
  54                 DEBUG(2, (__location__ ": gensec_update failed: %s\n",
  55                           nt_errstr(status)));
  56                 TALLOC_FREE(gensec_security);
  57                 return status;
  58         }
  59
  60         /* steal gensec context to the caller */
  61         *ctx = talloc_move(mem_ctx, &gensec_security);
  62         return status;
  63 }
  64
  65 NTSTATUS auth_generic_server_authtype_start(TALLOC_CTX *mem_ctx,
  66                                             uint8_t auth_type, uint8_t auth_level,
  67                                             DATA_BLOB *token_in,
  68                                             DATA_BLOB *token_out,
  69                                             const struct tsocket_address *remote_address,
  70                                             struct gensec_security **ctx)
  71 {
  72         NTSTATUS status;
  73         become_root();
  74
  75         /* this has to be done as root in order to create the messaging socket */
  76         status = auth_generic_server_authtype_start_as_root(mem_ctx,
  77                                                             auth_type, auth_level,
  78                                                             token_in,
  79                                                             token_out,
  80                                                             remote_address,
  81                                                             ctx);
  82         unbecome_root();
  83         return status;
  84 }
  85
  86 NTSTATUS auth_generic_server_step(struct gensec_security *gensec_security,
  87                              TALLOC_CTX *mem_ctx,
  88                              DATA_BLOB *token_in,
  89                              DATA_BLOB *token_out)
  90 {
  91         NTSTATUS status;
  92
  93         if (gensec_security == NULL) {
  94                 return NT_STATUS_INTERNAL_ERROR;
  95         }
  96
  97         /* this has to be done as root in order to verify the password */
  98         become_root();
  99         status = gensec_update(gensec_security, mem_ctx, *token_in, token_out);
 100         unbecome_root();
 101
 102         return status;
 103 }
 104
 105 NTSTATUS auth_generic_server_check_flags(struct gensec_security *gensec_security,
 106                                     bool do_sign, bool do_seal)
 107 {
 108         if (do_sign && !gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 109                 DEBUG(1, (__location__ "Integrity was requested but client "
 110                           "failed to negotiate signing.\n"));
 111                 return NT_STATUS_ACCESS_DENIED;
 112         }
 113
 114         if (do_seal && !gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 115                 DEBUG(1, (__location__ "Privacy was requested but client "
 116                           "failed to negotiate sealing.\n"));
 117                 return NT_STATUS_ACCESS_DENIED;
 118         }
 119
 120         return NT_STATUS_OK;
 121 }
 122
 123 NTSTATUS auth_generic_server_get_user_info(struct gensec_security *gensec_security,
 124                                       TALLOC_CTX *mem_ctx,
 125                                       struct auth_session_info **session_info)
 126 {
 127         NTSTATUS status;
 128
 129         /* this has to be done as root in order to get to the
 130          * messaging sockets for IDMAP and privilege.ldb in the AD
 131          * DC */
 132         become_root();
 133         status = gensec_session_info(gensec_security, mem_ctx, session_info);
 134         unbecome_root();
 135         if (!NT_STATUS_IS_OK(status)) {
 136                 DEBUG(1, (__location__ ": Failed to get authenticated user "
 137                           "info: %s\n", nt_errstr(status)));
 138                 return status;
 139         }
 140
 141         DEBUG(5, (__location__ "OK: user: %s domain: %s\n",
 142                   (*session_info)->info->account_name,
 143                   (*session_info)->info->domain_name));
 144
 145         return NT_STATUS_OK;
 146 }