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 "ntlmssp_wrap.h"
  25 #include "auth.h"
  26 #include "auth/gensec/gensec.h"
  27
  28 NTSTATUS auth_generic_server_start(TALLOC_CTX *mem_ctx,
  29                                    const char *oid,
  30                                    bool do_sign,
  31                                    bool do_seal,
  32                                    bool is_dcerpc,
  33                                    DATA_BLOB *token_in,
  34                                    DATA_BLOB *token_out,
  35                                    const struct tsocket_address *remote_address,
  36                                    struct gensec_security **ctx)
  37 {
  38         struct gensec_security *gensec_security = NULL;
  39         NTSTATUS status;
  40
  41         status = auth_generic_prepare(talloc_tos(), remote_address, &gensec_security);
  42         if (!NT_STATUS_IS_OK(status)) {
  43                 DEBUG(0, (__location__ ": auth_generic_prepare failed: %s\n",
  44                           nt_errstr(status)));
  45                 return status;
  46         }
  47
  48         if (do_sign) {
  49                 gensec_want_feature(gensec_security, GENSEC_FEATURE_SIGN);
  50         }
  51         if (do_seal) {
  52                 gensec_want_feature(gensec_security, GENSEC_FEATURE_SIGN);
  53                 gensec_want_feature(gensec_security, GENSEC_FEATURE_SEAL);
  54         }
  55
  56         if (is_dcerpc) {
  57                 gensec_want_feature(gensec_security, GENSEC_FEATURE_DCE_STYLE);
  58         }
  59
  60         status = gensec_start_mech_by_oid(gensec_security, oid);
  61         if (!NT_STATUS_IS_OK(status)) {
  62                 DEBUG(0, (__location__ ": auth_generic_start failed: %s\n",
  63                           nt_errstr(status)));
  64                 TALLOC_FREE(gensec_security);
  65                 return status;
  66         }
  67
  68         status = gensec_update(gensec_security, mem_ctx, NULL, *token_in, token_out);
  69         if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
  70                 DEBUG(2, (__location__ ": gensec_update failed: %s\n",
  71                           nt_errstr(status)));
  72                 TALLOC_FREE(gensec_security);
  73                 return status;
  74         }
  75
  76         /* steal gensec context to the caller */
  77         *ctx = talloc_move(mem_ctx, &gensec_security);
  78         return NT_STATUS_OK;
  79 }
  80
  81 NTSTATUS auth_generic_server_authtype_start(TALLOC_CTX *mem_ctx,
  82                                             uint8_t auth_type, uint8_t auth_level,
  83                                             DATA_BLOB *token_in,
  84                                             DATA_BLOB *token_out,
  85                                             const struct tsocket_address *remote_address,
  86                                             struct gensec_security **ctx)
  87 {
  88         struct gensec_security *gensec_security = NULL;
  89         NTSTATUS status;
  90
  91         status = auth_generic_prepare(talloc_tos(), remote_address, &gensec_security);
  92         if (!NT_STATUS_IS_OK(status)) {
  93                 DEBUG(0, (__location__ ": auth_generic_prepare failed: %s\n",
  94                           nt_errstr(status)));
  95                 return status;
  96         }
  97
  98         status = gensec_start_mech_by_authtype(gensec_security, auth_type, auth_level);
  99         if (!NT_STATUS_IS_OK(status)) {
 100                 DEBUG(0, (__location__ ": auth_generic_start failed: %s\n",
 101                           nt_errstr(status)));
 102                 TALLOC_FREE(gensec_security);
 103                 return status;
 104         }
 105
 106         status = gensec_update(gensec_security, mem_ctx, NULL, *token_in, token_out);
 107         if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 108                 DEBUG(2, (__location__ ": gensec_update failed: %s\n",
 109                           nt_errstr(status)));
 110                 TALLOC_FREE(gensec_security);
 111                 return status;
 112         }
 113
 114         /* steal gensec context to the caller */
 115         *ctx = talloc_move(mem_ctx, &gensec_security);
 116         return NT_STATUS_OK;
 117 }
 118
 119 NTSTATUS auth_generic_server_step(struct gensec_security *gensec_security,
 120                              TALLOC_CTX *mem_ctx,
 121                              DATA_BLOB *token_in,
 122                              DATA_BLOB *token_out)
 123 {
 124         NTSTATUS status;
 125
 126         /* this has to be done as root in order to verify the password */
 127         become_root();
 128         status = gensec_update(gensec_security, mem_ctx, NULL, *token_in, token_out);
 129         unbecome_root();
 130
 131         return status;
 132 }
 133
 134 NTSTATUS auth_generic_server_check_flags(struct gensec_security *gensec_security,
 135                                     bool do_sign, bool do_seal)
 136 {
 137         if (do_sign && !gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 138                 DEBUG(1, (__location__ "Integrity was requested but client "
 139                           "failed to negotiate signing.\n"));
 140                 return NT_STATUS_ACCESS_DENIED;
 141         }
 142
 143         if (do_seal && !gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 144                 DEBUG(1, (__location__ "Privacy was requested but client "
 145                           "failed to negotiate sealing.\n"));
 146                 return NT_STATUS_ACCESS_DENIED;
 147         }
 148
 149         return NT_STATUS_OK;
 150 }
 151
 152 NTSTATUS auth_generic_server_get_user_info(struct gensec_security *gensec_security,
 153                                       TALLOC_CTX *mem_ctx,
 154                                       struct auth_session_info **session_info)
 155 {
 156         NTSTATUS status;
 157
 158         status = gensec_session_info(gensec_security, mem_ctx, session_info);
 159         if (!NT_STATUS_IS_OK(status)) {
 160                 DEBUG(1, (__location__ ": Failed to get authenticated user "
 161                           "info: %s\n", nt_errstr(status)));
 162                 return status;
 163         }
 164
 165         DEBUG(5, (__location__ "OK: user: %s domain: %s\n",
 166                   (*session_info)->info->account_name,
 167                   (*session_info)->info->domain_name));
 168
 169         return NT_STATUS_OK;
 170 }