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                                    const struct tsocket_address *remote_address,
  34                                    struct auth_ntlmssp_state **ctx)
  35 {
  36         struct auth_ntlmssp_state *a = NULL;
  37         NTSTATUS status;
  38
  39         status = auth_ntlmssp_start(remote_address, &a);
  40         if (!NT_STATUS_IS_OK(status)) {
  41                 DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
  42                           nt_errstr(status)));
  43                 return status;
  44         }
  45
  46         /* Clear flags, then set them according to requested flags */
  47         auth_ntlmssp_and_flags(a, ~(NTLMSSP_NEGOTIATE_SIGN |
  48                                         NTLMSSP_NEGOTIATE_SEAL));
  49
  50         if (do_sign) {
  51                 auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN);
  52         }
  53         if (do_seal) {
  54                 /* Always implies both sign and seal for ntlmssp */
  55                 auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN |
  56                                          NTLMSSP_NEGOTIATE_SEAL);
  57         }
  58
  59         status = auth_ntlmssp_update(a, *token_in, token_out);
  60         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
  61                 DEBUG(0, (__location__ ": auth_ntlmssp_update failed: %s\n",
  62                           nt_errstr(status)));
  63                 goto done;
  64         }
  65
  66         /* Make sure data is bound to the memctx, to be freed the caller */
  67         talloc_steal(mem_ctx, token_out->data);
  68         /* steal ntlmssp context too */
  69         *ctx = talloc_move(mem_ctx, &a);
  70
  71         status = NT_STATUS_OK;
  72
  73 done:
  74         if (!NT_STATUS_IS_OK(status)) {
  75                 TALLOC_FREE(a);
  76         }
  77
  78         return status;
  79 }
  80
  81 NTSTATUS ntlmssp_server_step(struct auth_ntlmssp_state *ctx,
  82                              TALLOC_CTX *mem_ctx,
  83                              DATA_BLOB *token_in,
  84                              DATA_BLOB *token_out)
  85 {
  86         NTSTATUS status;
  87
  88         /* this has to be done as root in order to verify the password */
  89         become_root();
  90         status = auth_ntlmssp_update(ctx, *token_in, token_out);
  91         unbecome_root();
  92
  93         /* put the output token data on the given mem_ctx */
  94         talloc_steal(mem_ctx, token_out->data);
  95
  96         return status;
  97 }
  98
  99 NTSTATUS ntlmssp_server_check_flags(struct auth_ntlmssp_state *ctx,
 100                                     bool do_sign, bool do_seal)
 101 {
 102         if (do_sign && !auth_ntlmssp_negotiated_sign(ctx)) {
 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 && !auth_ntlmssp_negotiated_seal(ctx)) {
 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 auth_ntlmssp_state *ctx,
 118                                       TALLOC_CTX *mem_ctx,
 119                                       struct auth_session_info **session_info)
 120 {
 121         NTSTATUS status;
 122
 123         status = auth_ntlmssp_steal_session_info(mem_ctx, 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 workstation: %s\n",
 131                   auth_ntlmssp_get_username(ctx),
 132                   auth_ntlmssp_get_domain(ctx),
 133                   auth_ntlmssp_get_client(ctx)));
 134
 135         return NT_STATUS_OK;
 136 }