source4/auth/auth_domain.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Authenticate a user to a domain controller
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   7    Copyright (C) Andrew Tridgell 2004
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25 #include "librpc/gen_ndr/ndr_netlogon.h"
  26 #include "include/secrets.h"
  27 #include "lib/ldb/include/ldb.h"
  28 #include "auth/auth.h"
  29
  30 /* Authenticate a user with a challenge/response */
  31 static NTSTATUS domain_check_password(struct auth_method_context *ctx,
  32                                       TALLOC_CTX *mem_ctx,
  33                                       const struct auth_usersupplied_info *user_info,
  34                                       struct auth_serversupplied_info **server_info)
  35 {
  36         NTSTATUS status;
  37
  38         struct dcerpc_pipe *p;
  39         struct dcerpc_binding *b;
  40         struct netr_LogonSamLogon r;
  41         struct netr_Authenticator auth, auth2;
  42         struct netr_NetworkInfo ninfo;
  43
  44         struct creds_CredentialState *creds;
  45         struct cli_credentials *credentials;
  46
  47         const char **bindings = lp_passwordserver();
  48         const char *binding;
  49
  50         if (bindings && bindings[0]) {
  51                 binding = bindings[0];
  52         }
  53
  54         if (!user_info->account_name) {
  55                 return NT_STATUS_INVALID_PARAMETER;
  56         }
  57         if (!user_info->workstation_name) {
  58                 return NT_STATUS_INVALID_PARAMETER;
  59         }
  60
  61         credentials = cli_credentials_init(mem_ctx);
  62         cli_credentials_set_conf(credentials);
  63         status = cli_credentials_set_machine_account(credentials);
  64
  65         if (!NT_STATUS_IS_OK(status)) {
  66                 return status;
  67         }
  68
  69         /* Connect to DC (take a binding string for now) */
  70
  71         status = dcerpc_parse_binding(mem_ctx, binding, &b);
  72         if (!NT_STATUS_IS_OK(status)) {
  73                 printf("Bad binding string %s\n", binding);
  74                 return NT_STATUS_INVALID_PARAMETER;
  75         }
  76
  77         /* We like schannel */
  78         b->flags &= ~DCERPC_AUTH_OPTIONS;
  79         b->flags |= DCERPC_SCHANNEL_WORKSTATION | DCERPC_SEAL | DCERPC_SCHANNEL_128;
  80
  81         /* Setup schannel */
  82         status = dcerpc_pipe_connect_b(mem_ctx, &p, b,
  83                                        DCERPC_NETLOGON_UUID,
  84                                        DCERPC_NETLOGON_VERSION,
  85                                        credentials);
  86
  87         if (!NT_STATUS_IS_OK(status)) {
  88                 return status;
  89         }
  90
  91         /* call domain logon */
  92
  93         status = dcerpc_schannel_creds(p->conn->security_state.generic_state, mem_ctx, &creds);
  94         if (!NT_STATUS_IS_OK(status)) {
  95                 return status;
  96         }
  97
  98         ninfo.identity_info.domain_name.string = user_info->domain_name;
  99         ninfo.identity_info.parameter_control = 0;
 100         ninfo.identity_info.logon_id_low = 0;
 101         ninfo.identity_info.logon_id_high = 0;
 102         ninfo.identity_info.account_name.string = user_info->account_name;
 103         ninfo.identity_info.workstation.string = user_info->workstation_name;
 104         memcpy(ninfo.challenge, ctx->auth_ctx->challenge.data.data, sizeof(ninfo.challenge));
 105
 106         ninfo.nt.length = user_info->nt_resp.length;
 107         ninfo.nt.data =  user_info->nt_resp.data;
 108         ninfo.lm.length = user_info->lm_resp.length;
 109         ninfo.lm.data = user_info->lm_resp.data;
 110
 111         r.in.server_name = talloc_asprintf(mem_ctx, "\\\\%s", dcerpc_server_name(p));
 112         r.in.workstation = cli_credentials_get_workstation(credentials);
 113         r.in.credential = &auth;
 114         r.in.return_authenticator = &auth2;
 115         r.in.logon_level = 2;
 116         r.in.logon.network = &ninfo;
 117         r.in.validation_level = 3;
 118
 119         ZERO_STRUCT(auth2);
 120         creds_client_authenticator(creds, &auth);
 121
 122         status = dcerpc_netr_LogonSamLogon(p, mem_ctx, &r);
 123
 124         if (!creds_client_check(creds, &r.out.return_authenticator->cred)) {
 125                 DEBUG(1, ("Credential chaining failed\n"));
 126                 return NT_STATUS_ACCESS_DENIED;
 127         }
 128
 129         /* make server info */
 130
 131         if (!NT_STATUS_IS_OK(status)) {
 132                 return status;
 133         }
 134
 135         status = make_server_info_netlogon_validation(mem_ctx,
 136                                                       user_info->account_name,
 137                                                       r.in.validation_level, &r.out.validation,
 138                                                       server_info);
 139         return status;
 140 }
 141
 142 static const struct auth_operations domain_ops = {
 143         .name           = "domain",
 144         .get_challenge  = auth_get_challenge_not_implemented,
 145         .check_password = domain_check_password
 146 };
 147
 148 NTSTATUS auth_domain_init(void)
 149 {
 150         NTSTATUS ret;
 151
 152         ret = auth_register(&domain_ops);
 153         if (!NT_STATUS_IS_OK(ret)) {
 154                 DEBUG(0,("Failed to register 'domain' auth backend!\n"));
 155                 return ret;
 156         }
 157         return ret;
 158 }