source3/rpc_server/dcesrv_ntlmssp.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_ntlmssp.h"
  24 #include "../auth/ntlmssp/ntlmssp.h"
  25 #include "ntlmssp_wrap.h"
  26 #include "auth.h"
  27 #include "auth/gensec/gensec.h"
  28
  29 NTSTATUS ntlmssp_server_auth_start(TALLOC_CTX *mem_ctx,
  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 auth_generic_state *a = NULL;
  39         NTSTATUS status;
  40
  41         status = auth_generic_prepare(remote_address, &a);
  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(a->gensec_security, GENSEC_FEATURE_SIGN);
  50         }
  51         if (do_seal) {
  52                 /* Always implies both sign and seal for ntlmssp */
  53                 gensec_want_feature(a->gensec_security, GENSEC_FEATURE_SEAL);
  54         }
  55
  56         if (is_dcerpc) {
  57                 gensec_want_feature(a->gensec_security, GENSEC_FEATURE_DCE_STYLE);
  58         }
  59
  60         status = auth_ntlmssp_start(a);
  61         if (!NT_STATUS_IS_OK(status)) {
  62                 DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
  63                           nt_errstr(status)));
  64                 return status;
  65         }
  66
  67         status = gensec_update(a->gensec_security, mem_ctx, NULL, *token_in, token_out);
  68         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
  69                 DEBUG(0, (__location__ ": auth_ntlmssp_update failed: %s\n",
  70                           nt_errstr(status)));
  71                 goto done;
  72         }
  73
  74         /* steal ntlmssp context too */
  75         *ctx = talloc_move(mem_ctx, &a->gensec_security);
  76
  77         status = NT_STATUS_OK;
  78
  79 done:
  80         TALLOC_FREE(a);
  81
  82         return status;
  83 }
  84
  85 NTSTATUS ntlmssp_server_step(struct gensec_security *gensec_security,
  86                              TALLOC_CTX *mem_ctx,
  87                              DATA_BLOB *token_in,
  88                              DATA_BLOB *token_out)
  89 {
  90         NTSTATUS status;
  91
  92         /* this has to be done as root in order to verify the password */
  93         become_root();
  94         status = gensec_update(gensec_security, mem_ctx, NULL, *token_in, token_out);
  95         unbecome_root();
  96
  97         return status;
  98 }
  99
 100 NTSTATUS ntlmssp_server_check_flags(struct gensec_security *gensec_security,
 101                                     bool do_sign, bool do_seal)
 102 {
 103         if (do_sign && !gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 104                 DEBUG(1, (__location__ "Integrity was requested but client "
 105                           "failed to negotiate signing.\n"));
 106                 return NT_STATUS_ACCESS_DENIED;
 107         }
 108
 109         if (do_seal && !gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 110                 DEBUG(1, (__location__ "Privacy was requested but client "
 111                           "failed to negotiate sealing.\n"));
 112                 return NT_STATUS_ACCESS_DENIED;
 113         }
 114
 115         return NT_STATUS_OK;
 116 }
 117
 118 NTSTATUS ntlmssp_server_get_user_info(struct gensec_security *gensec_security,
 119                                       TALLOC_CTX *mem_ctx,
 120                                       struct auth_session_info **session_info)
 121 {
 122         NTSTATUS status;
 123
 124         status = gensec_session_info(gensec_security, mem_ctx, session_info);
 125         if (!NT_STATUS_IS_OK(status)) {
 126                 DEBUG(1, (__location__ ": Failed to get authenticated user "
 127                           "info: %s\n", nt_errstr(status)));
 128                 return status;
 129         }
 130
 131         DEBUG(5, (__location__ "OK: user: %s domain: %s\n",
 132                   (*session_info)->info->account_name,
 133                   (*session_info)->info->domain_name));
 134
 135         return NT_STATUS_OK;
 136 }