source/librpc/rpc/dcerpc_auth.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Generic Authentication Interface
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004
   8
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26
  27 /*
  28   do a non-athenticated dcerpc bind
  29 */
  30 NTSTATUS dcerpc_bind_auth_none(struct dcerpc_pipe *p,
  31                                const char *uuid, uint_t version)
  32 {
  33         TALLOC_CTX *mem_ctx;
  34         NTSTATUS status;
  35
  36         mem_ctx = talloc_init("dcerpc_bind_auth_ntlm");
  37         if (!mem_ctx) {
  38                 return NT_STATUS_NO_MEMORY;
  39         }
  40
  41         status = dcerpc_bind_byuuid(p, mem_ctx, uuid, version);
  42         talloc_destroy(mem_ctx);
  43
  44         return status;
  45 }
  46
  47 NTSTATUS dcerpc_bind_auth3(struct dcerpc_pipe *p, uint8_t auth_type, uint8_t auth_level,
  48                            const char *uuid, uint_t version)
  49 {
  50         NTSTATUS status;
  51         TALLOC_CTX *mem_ctx;
  52         DATA_BLOB credentials;
  53         DATA_BLOB null_data_blob = data_blob(NULL, 0);
  54
  55         mem_ctx = talloc_init("dcerpc_bind_auth");
  56         if (!mem_ctx) {
  57                 return NT_STATUS_NO_MEMORY;
  58         }
  59
  60         if (!p->conn->security_state.generic_state) {
  61                 status = gensec_client_start(p, &p->conn->security_state.generic_state);
  62                 if (!NT_STATUS_IS_OK(status)) {
  63                         return status;
  64                 }
  65
  66                 status = gensec_start_mech_by_authtype(p->conn->security_state.generic_state,
  67                                                        auth_type, auth_level);
  68
  69                 if (!NT_STATUS_IS_OK(status)) {
  70                         return status;
  71                 }
  72         }
  73
  74         p->conn->security_state.auth_info = talloc(p, struct dcerpc_auth);
  75         if (!p->conn->security_state.auth_info) {
  76                 status = NT_STATUS_NO_MEMORY;
  77                 goto done;
  78         }
  79
  80         p->conn->security_state.auth_info->auth_type = auth_type;
  81         p->conn->security_state.auth_info->auth_level = auth_level;
  82         p->conn->security_state.auth_info->auth_pad_length = 0;
  83         p->conn->security_state.auth_info->auth_reserved = 0;
  84         p->conn->security_state.auth_info->auth_context_id = random();
  85         p->conn->security_state.auth_info->credentials = null_data_blob;
  86
  87         status = gensec_update(p->conn->security_state.generic_state, mem_ctx,
  88                                null_data_blob,
  89                                &credentials);
  90
  91         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
  92                 goto done;
  93         }
  94
  95         p->conn->security_state.auth_info->credentials = credentials;
  96
  97         status = dcerpc_bind_byuuid(p, mem_ctx, uuid, version);
  98         if (!NT_STATUS_IS_OK(status)) {
  99                 goto done;
 100         }
 101
 102         status = gensec_update(p->conn->security_state.generic_state, mem_ctx,
 103                                p->conn->security_state.auth_info->credentials,
 104                                &credentials);
 105
 106         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 107                 goto done;
 108         }
 109
 110         p->conn->security_state.auth_info->credentials = credentials;
 111
 112         status = dcerpc_auth3(p->conn, mem_ctx);
 113 done:
 114         talloc_destroy(mem_ctx);
 115
 116         if (!NT_STATUS_IS_OK(status)) {
 117                 talloc_free(p->conn->security_state.generic_state);
 118                 ZERO_STRUCT(p->conn->security_state);
 119         } else {
 120                 /* Authenticated connections use the generic session key */
 121                 p->conn->security_state.session_key = dcerpc_generic_session_key;
 122         }
 123
 124         return status;
 125 }