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 "../libcli/auth/ntlmssp.h"
  24 #include "ntlmssp_wrap.h"
  25
  26 NTSTATUS ntlmssp_server_auth_start(TALLOC_CTX *mem_ctx,
  27                                    bool do_sign,
  28                                    bool do_seal,
  29                                    bool is_dcerpc,
  30                                    DATA_BLOB *token_in,
  31                                    DATA_BLOB *token_out,
  32                                    struct auth_ntlmssp_state **ctx)
  33 {
  34         struct auth_ntlmssp_state *a = NULL;
  35         NTSTATUS status;
  36
  37         status = auth_ntlmssp_start(&a);
  38         if (!NT_STATUS_IS_OK(status)) {
  39                 DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
  40                           nt_errstr(status)));
  41                 return status;
  42         }
  43
  44         /* Clear flags, then set them according to requested flags */
  45         auth_ntlmssp_and_flags(a, ~(NTLMSSP_NEGOTIATE_SIGN |
  46                                         NTLMSSP_NEGOTIATE_SEAL));
  47
  48         if (do_sign) {
  49                 auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN);
  50         }
  51         if (do_seal) {
  52                 /* Always implies both sign and seal for ntlmssp */
  53                 auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN |
  54                                          NTLMSSP_NEGOTIATE_SEAL);
  55         }
  56
  57         status = auth_ntlmssp_update(a, *token_in, token_out);
  58         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
  59                 DEBUG(0, (__location__ ": auth_ntlmssp_update failed: %s\n",
  60                           nt_errstr(status)));
  61                 goto done;
  62         }
  63
  64         /* Make sure data is bound to the memctx, to be freed the caller */
  65         talloc_steal(mem_ctx, token_out->data);
  66         /* steal ntlmssp context too */
  67         *ctx = talloc_move(mem_ctx, &a);
  68
  69         status = NT_STATUS_OK;
  70
  71 done:
  72         if (!NT_STATUS_IS_OK(status)) {
  73                 TALLOC_FREE(a);
  74         }
  75
  76         return status;
  77 }
  78
  79 NTSTATUS ntlmssp_server_step(struct auth_ntlmssp_state *ctx,
  80                              TALLOC_CTX *mem_ctx,
  81                              DATA_BLOB *token_in,
  82                              DATA_BLOB *token_out)
  83 {
  84         NTSTATUS status;
  85
  86         /* this has to be done as root in order to verify the password */
  87         become_root();
  88         status = auth_ntlmssp_update(ctx, *token_in, token_out);
  89         unbecome_root();
  90
  91         /* put the output token data on the given mem_ctx */
  92         talloc_steal(mem_ctx, token_out->data);
  93
  94         return status;
  95 }
  96
  97 NTSTATUS ntlmssp_server_check_flags(struct auth_ntlmssp_state *ctx,
  98                                     bool do_sign, bool do_seal)
  99 {
 100         if (do_sign && !auth_ntlmssp_negotiated_sign(ctx)) {
 101                 DEBUG(1, (__location__ "Integrity was requested but client "
 102                           "failed to negotiate signing.\n"));
 103                 return NT_STATUS_ACCESS_DENIED;
 104         }
 105
 106         if (do_seal && !auth_ntlmssp_negotiated_seal(ctx)) {
 107                 DEBUG(1, (__location__ "Privacy was requested but client "
 108                           "failed to negotiate sealing.\n"));
 109                 return NT_STATUS_ACCESS_DENIED;
 110         }
 111
 112         return NT_STATUS_OK;
 113 }
 114
 115 NTSTATUS ntlmssp_server_get_user_info(struct auth_ntlmssp_state *ctx,
 116                                       TALLOC_CTX *mem_ctx,
 117                                       struct auth_serversupplied_info **server_info)
 118 {
 119         NTSTATUS status;
 120
 121         status = auth_ntlmssp_steal_server_info(mem_ctx, ctx, server_info);
 122         if (!NT_STATUS_IS_OK(status)) {
 123                 DEBUG(1, (__location__ ": Failed to get authenticated user "
 124                           "info: %s\n", nt_errstr(status)));
 125                 return status;
 126         }
 127
 128         DEBUG(5, (__location__ "OK: user: %s domain: %s workstation: %s\n",
 129                   auth_ntlmssp_get_username(ctx),
 130                   auth_ntlmssp_get_domain(ctx),
 131                   auth_ntlmssp_get_client(ctx)));
 132
 133         return NT_STATUS_OK;
 134 }