source3/rpc_server/dcesrv_auth_generic.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_auth_generic.h"
  24 #include "auth.h"
  25 #include "auth/gensec/gensec.h"
  26
  27 NTSTATUS auth_generic_server_start(TALLOC_CTX *mem_ctx,
  28                                    const char *oid,
  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 gensec_security *gensec_security = NULL;
  38         NTSTATUS status;
  39
  40         status = auth_generic_prepare(talloc_tos(), remote_address, &gensec_security);
  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(gensec_security, GENSEC_FEATURE_SIGN);
  49         }
  50         if (do_seal) {
  51                 gensec_want_feature(gensec_security, GENSEC_FEATURE_SIGN);
  52                 gensec_want_feature(gensec_security, GENSEC_FEATURE_SEAL);
  53         }
  54
  55         if (is_dcerpc) {
  56                 gensec_want_feature(gensec_security, GENSEC_FEATURE_DCE_STYLE);
  57         }
  58
  59         status = gensec_start_mech_by_oid(gensec_security, oid);
  60         if (!NT_STATUS_IS_OK(status)) {
  61                 DEBUG(0, (__location__ ": auth_generic_start failed: %s\n",
  62                           nt_errstr(status)));
  63                 TALLOC_FREE(gensec_security);
  64                 return status;
  65         }
  66
  67         status = gensec_update(gensec_security, mem_ctx, NULL, *token_in, token_out);
  68         if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
  69                 DEBUG(2, (__location__ ": gensec_update failed: %s\n",
  70                           nt_errstr(status)));
  71                 TALLOC_FREE(gensec_security);
  72                 return status;
  73         }
  74
  75         /* steal gensec context to the caller */
  76         *ctx = talloc_move(mem_ctx, &gensec_security);
  77         return NT_STATUS_OK;
  78 }
  79
  80 NTSTATUS auth_generic_server_authtype_start(TALLOC_CTX *mem_ctx,
  81                                             uint8_t auth_type, uint8_t auth_level,
  82                                             DATA_BLOB *token_in,
  83                                             DATA_BLOB *token_out,
  84                                             const struct tsocket_address *remote_address,
  85                                             struct gensec_security **ctx)
  86 {
  87         struct gensec_security *gensec_security = NULL;
  88         NTSTATUS status;
  89
  90         status = auth_generic_prepare(talloc_tos(), remote_address, &gensec_security);
  91         if (!NT_STATUS_IS_OK(status)) {
  92                 DEBUG(0, (__location__ ": auth_generic_prepare failed: %s\n",
  93                           nt_errstr(status)));
  94                 return status;
  95         }
  96
  97         status = gensec_start_mech_by_authtype(gensec_security, auth_type, auth_level);
  98         if (!NT_STATUS_IS_OK(status)) {
  99                 DEBUG(0, (__location__ ": auth_generic_start failed: %s\n",
 100                           nt_errstr(status)));
 101                 TALLOC_FREE(gensec_security);
 102                 return status;
 103         }
 104
 105         status = gensec_update(gensec_security, mem_ctx, NULL, *token_in, token_out);
 106         if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 107                 DEBUG(2, (__location__ ": gensec_update failed: %s\n",
 108                           nt_errstr(status)));
 109                 TALLOC_FREE(gensec_security);
 110                 return status;
 111         }
 112
 113         /* steal gensec context to the caller */
 114         *ctx = talloc_move(mem_ctx, &gensec_security);
 115         return NT_STATUS_OK;
 116 }
 117
 118 NTSTATUS auth_generic_server_step(struct gensec_security *gensec_security,
 119                              TALLOC_CTX *mem_ctx,
 120                              DATA_BLOB *token_in,
 121                              DATA_BLOB *token_out)
 122 {
 123         NTSTATUS status;
 124
 125         /* this has to be done as root in order to verify the password */
 126         become_root();
 127         status = gensec_update(gensec_security, mem_ctx, NULL, *token_in, token_out);
 128         unbecome_root();
 129
 130         return status;
 131 }
 132
 133 NTSTATUS auth_generic_server_check_flags(struct gensec_security *gensec_security,
 134                                     bool do_sign, bool do_seal)
 135 {
 136         if (do_sign && !gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 137                 DEBUG(1, (__location__ "Integrity was requested but client "
 138                           "failed to negotiate signing.\n"));
 139                 return NT_STATUS_ACCESS_DENIED;
 140         }
 141
 142         if (do_seal && !gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
 143                 DEBUG(1, (__location__ "Privacy was requested but client "
 144                           "failed to negotiate sealing.\n"));
 145                 return NT_STATUS_ACCESS_DENIED;
 146         }
 147
 148         return NT_STATUS_OK;
 149 }
 150
 151 NTSTATUS auth_generic_server_get_user_info(struct gensec_security *gensec_security,
 152                                       TALLOC_CTX *mem_ctx,
 153                                       struct auth_session_info **session_info)
 154 {
 155         NTSTATUS status;
 156
 157         status = gensec_session_info(gensec_security, mem_ctx, session_info);
 158         if (!NT_STATUS_IS_OK(status)) {
 159                 DEBUG(1, (__location__ ": Failed to get authenticated user "
 160                           "info: %s\n", nt_errstr(status)));
 161                 return status;
 162         }
 163
 164         DEBUG(5, (__location__ "OK: user: %s domain: %s\n",
 165                   (*session_info)->info->account_name,
 166                   (*session_info)->info->domain_name));
 167
 168         return NT_STATUS_OK;
 169 }