source3/rpc_server/dcesrv_ntlmssp.c

   1 /*
   2  *  NTLMSSP Acceptor
   3  *  DCERPC Server functions
   4  *  Copyright (C) Simo Sorce 2010.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20
  21 #include "includes.h"
  22 #include "rpc_server/dcesrv_ntlmssp.h"
  23 #include "../auth/ntlmssp/ntlmssp.h"
  24 #include "ntlmssp_wrap.h"
  25 #include "auth.h"
  26 #include "auth/gensec/gensec.h"
  27
  28 NTSTATUS ntlmssp_server_auth_start(TALLOC_CTX *mem_ctx,
  29                                    bool do_sign,
  30                                    bool do_seal,
  31                                    bool is_dcerpc,
  32                                    DATA_BLOB *token_in,
  33                                    DATA_BLOB *token_out,
  34                                    const struct tsocket_address *remote_address,
  35                                    struct gensec_security **ctx)
  36 {
  37         struct auth_ntlmssp_state *a = NULL;
  38         NTSTATUS status;
  39
  40         status = auth_ntlmssp_prepare(remote_address, &a);
  41         if (!NT_STATUS_IS_OK(status)) {
  42                 DEBUG(0, (__location__ ": auth_ntlmssp_prepare failed: %s\n",
  43                           nt_errstr(status)));
  44                 return status;
  45         }
  46
  47         if (do_sign) {
  48                 gensec_want_feature(a->gensec_security, GENSEC_FEATURE_SIGN);
  49         }
  50         if (do_seal) {
  51                 /* Always implies both sign and seal for ntlmssp */
  52                 gensec_want_feature(a->gensec_security, GENSEC_FEATURE_SEAL);
  53         }
  54
  55         status = auth_ntlmssp_start(a);
  56         if (!NT_STATUS_IS_OK(status)) {
  57                 DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
  58                           nt_errstr(status)));
  59                 return status;
  60         }
  61
  62         status = gensec_update(a->gensec_security, mem_ctx, NULL, *token_in, token_out);
  63         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
  64                 DEBUG(0, (__location__ ": auth_ntlmssp_update failed: %s\n",
  65                           nt_errstr(status)));
  66                 goto done;
  67         }
  68
  69         /* steal ntlmssp context too */
  70         *ctx = talloc_move(mem_ctx, &a->gensec_security);
  71
  72         status = NT_STATUS_OK;
  73
  74 done:
  75         TALLOC_FREE(a);
  76
  77         return status;
  78 }
  79
  80 NTSTATUS ntlmssp_server_step(struct gensec_security *gensec_security,
  81                              TALLOC_CTX *mem_ctx,
  82                              DATA_BLOB *token_in,
  83                              DATA_BLOB *token_out)
  84 {
  85         NTSTATUS status;
  86
  87         /* this has to be done as root in order to verify the password */
  88         become_root();
  89         status = gensec_update(gensec_security, mem_ctx, NULL, *token_in, token_out);
  90         unbecome_root();
  91
  92         return status;
  93 }
  94
  95 NTSTATUS ntlmssp_server_check_flags(struct gensec_security *gensec_security,
  96                                     bool do_sign, bool do_seal)
  97 {
  98         if (do_sign && !gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
  99                 DEBUG(1, (__location__ "Integrity was requested but client "
 100                           "failed to negotiate signing.\n"));
 101                 return NT_STATUS_ACCESS_DENIED;
 102         }
 103
 104         if (do_seal && !gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 105                 DEBUG(1, (__location__ "Privacy was requested but client "
 106                           "failed to negotiate sealing.\n"));
 107                 return NT_STATUS_ACCESS_DENIED;
 108         }
 109
 110         return NT_STATUS_OK;
 111 }
 112
 113 NTSTATUS ntlmssp_server_get_user_info(struct gensec_security *gensec_security,
 114                                       TALLOC_CTX *mem_ctx,
 115                                       struct auth_session_info **session_info)
 116 {
 117         NTSTATUS status;
 118
 119         status = gensec_session_info(gensec_security, mem_ctx, session_info);
 120         if (!NT_STATUS_IS_OK(status)) {
 121                 DEBUG(1, (__location__ ": Failed to get authenticated user "
 122                           "info: %s\n", nt_errstr(status)));
 123                 return status;
 124         }
 125
 126         DEBUG(5, (__location__ "OK: user: %s domain: %s\n",
 127                   (*session_info)->info->account_name,
 128                   (*session_info)->info->domain_name));
 129
 130         return NT_STATUS_OK;
 131 }