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 #include "auth.h"
  26
  27 NTSTATUS ntlmssp_server_auth_start(TALLOC_CTX *mem_ctx,
  28                                    bool do_sign,
  29                                    bool do_seal,
  30                                    bool is_dcerpc,
  31                                    DATA_BLOB *token_in,
  32                                    DATA_BLOB *token_out,
  33                                    struct auth_ntlmssp_state **ctx)
  34 {
  35         struct auth_ntlmssp_state *a = NULL;
  36         NTSTATUS status;
  37
  38         status = auth_ntlmssp_start(&a);
  39         if (!NT_STATUS_IS_OK(status)) {
  40                 DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
  41                           nt_errstr(status)));
  42                 return status;
  43         }
  44
  45         /* Clear flags, then set them according to requested flags */
  46         auth_ntlmssp_and_flags(a, ~(NTLMSSP_NEGOTIATE_SIGN |
  47                                         NTLMSSP_NEGOTIATE_SEAL));
  48
  49         if (do_sign) {
  50                 auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN);
  51         }
  52         if (do_seal) {
  53                 /* Always implies both sign and seal for ntlmssp */
  54                 auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN |
  55                                          NTLMSSP_NEGOTIATE_SEAL);
  56         }
  57
  58         status = auth_ntlmssp_update(a, *token_in, token_out);
  59         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
  60                 DEBUG(0, (__location__ ": auth_ntlmssp_update failed: %s\n",
  61                           nt_errstr(status)));
  62                 goto done;
  63         }
  64
  65         /* Make sure data is bound to the memctx, to be freed the caller */
  66         talloc_steal(mem_ctx, token_out->data);
  67         /* steal ntlmssp context too */
  68         *ctx = talloc_move(mem_ctx, &a);
  69
  70         status = NT_STATUS_OK;
  71
  72 done:
  73         if (!NT_STATUS_IS_OK(status)) {
  74                 TALLOC_FREE(a);
  75         }
  76
  77         return status;
  78 }
  79
  80 NTSTATUS ntlmssp_server_step(struct auth_ntlmssp_state *ctx,
  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 = auth_ntlmssp_update(ctx, *token_in, token_out);
  90         unbecome_root();
  91
  92         /* put the output token data on the given mem_ctx */
  93         talloc_steal(mem_ctx, token_out->data);
  94
  95         return status;
  96 }
  97
  98 NTSTATUS ntlmssp_server_check_flags(struct auth_ntlmssp_state *ctx,
  99                                     bool do_sign, bool do_seal)
 100 {
 101         if (do_sign && !auth_ntlmssp_negotiated_sign(ctx)) {
 102                 DEBUG(1, (__location__ "Integrity was requested but client "
 103                           "failed to negotiate signing.\n"));
 104                 return NT_STATUS_ACCESS_DENIED;
 105         }
 106
 107         if (do_seal && !auth_ntlmssp_negotiated_seal(ctx)) {
 108                 DEBUG(1, (__location__ "Privacy was requested but client "
 109                           "failed to negotiate sealing.\n"));
 110                 return NT_STATUS_ACCESS_DENIED;
 111         }
 112
 113         return NT_STATUS_OK;
 114 }
 115
 116 NTSTATUS ntlmssp_server_get_user_info(struct auth_ntlmssp_state *ctx,
 117                                       TALLOC_CTX *mem_ctx,
 118                                       struct auth_serversupplied_info **session_info)
 119 {
 120         NTSTATUS status;
 121
 122         status = auth_ntlmssp_steal_session_info(mem_ctx, ctx, session_info);
 123         if (!NT_STATUS_IS_OK(status)) {
 124                 DEBUG(1, (__location__ ": Failed to get authenticated user "
 125                           "info: %s\n", nt_errstr(status)));
 126                 return status;
 127         }
 128
 129         DEBUG(5, (__location__ "OK: user: %s domain: %s workstation: %s\n",
 130                   auth_ntlmssp_get_username(ctx),
 131                   auth_ntlmssp_get_domain(ctx),
 132                   auth_ntlmssp_get_client(ctx)));
 133
 134         return NT_STATUS_OK;
 135 }