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