source4/winbind/wb_connect_sam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Connect to the SAMR pipe, and return connection and domain handles.
   5
   6    Copyright (C) Volker Lendecke 2005
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2007
   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 3 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, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "libcli/composite/composite.h"
  25
  26 #include "libcli/security/security.h"
  27 #include "librpc/gen_ndr/ndr_samr_c.h"
  28 #include "winbind/wb_server.h"
  29
  30
  31 /* Helper to initialize SAMR with a specific auth methods. Verify by opening
  32  * the SAM handle */
  33
  34 struct connect_samr_state {
  35         struct composite_context *ctx;
  36         struct dom_sid *sid;
  37
  38         struct dcerpc_pipe *samr_pipe;
  39         struct policy_handle *connect_handle;
  40         struct policy_handle *domain_handle;
  41
  42         struct samr_Connect2 c;
  43         struct samr_OpenDomain o;
  44 };
  45
  46 static void connect_samr_recv_pipe(struct composite_context *ctx);
  47 static void connect_samr_recv_conn(struct tevent_req *subreq);
  48 static void connect_samr_recv_open(struct tevent_req *subreq);
  49
  50 struct composite_context *wb_connect_samr_send(TALLOC_CTX *mem_ctx,
  51                                            struct wbsrv_domain *domain)
  52 {
  53         struct composite_context *result, *ctx;
  54         struct connect_samr_state *state;
  55
  56         result = composite_create(mem_ctx, domain->netlogon_pipe->conn->event_ctx);
  57         if (result == NULL) goto failed;
  58
  59         state = talloc(result, struct connect_samr_state);
  60         if (state == NULL) goto failed;
  61         state->ctx = result;
  62         result->private_data = state;
  63
  64         state->sid = dom_sid_dup(state, domain->info->sid);
  65         if (state->sid == NULL) goto failed;
  66
  67         /* this will make the secondary connection on the same IPC$ share,
  68            secured with SPNEGO, NTLMSSP or SCHANNEL */
  69         ctx = dcerpc_secondary_auth_connection_send(domain->netlogon_pipe,
  70                                                     domain->samr_binding,
  71                                                     &ndr_table_samr,
  72                                                     domain->libnet_ctx->cred,
  73                                                     domain->libnet_ctx->lp_ctx);
  74         composite_continue(state->ctx, ctx, connect_samr_recv_pipe, state);
  75         return result;
  76
  77  failed:
  78         talloc_free(result);
  79         return NULL;
  80 }
  81
  82 static void connect_samr_recv_pipe(struct composite_context *ctx)
  83 {
  84         struct connect_samr_state *state =
  85                 talloc_get_type(ctx->async.private_data,
  86                                 struct connect_samr_state);
  87         struct tevent_req *subreq;
  88
  89         state->ctx->status = dcerpc_secondary_auth_connection_recv(ctx, state,
  90                                                                    &state->samr_pipe);
  91         if (!composite_is_ok(state->ctx)) return;
  92
  93         state->connect_handle = talloc(state, struct policy_handle);
  94         if (composite_nomem(state->connect_handle, state->ctx)) return;
  95
  96         state->c.in.system_name =
  97                 talloc_asprintf(state, "\\\\%s",
  98                                 dcerpc_server_name(state->samr_pipe));
  99         state->c.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
 100         state->c.out.connect_handle = state->connect_handle;
 101
 102         subreq = dcerpc_samr_Connect2_r_send(state,
 103                                              state->ctx->event_ctx,
 104                                              state->samr_pipe->binding_handle,
 105                                              &state->c);
 106         if (composite_nomem(subreq, state->ctx)) return;
 107         tevent_req_set_callback(subreq, connect_samr_recv_conn, state);
 108 }
 109
 110 static void connect_samr_recv_conn(struct tevent_req *subreq)
 111 {
 112         struct connect_samr_state *state =
 113                 tevent_req_callback_data(subreq,
 114                 struct connect_samr_state);
 115
 116         state->ctx->status = dcerpc_samr_Connect2_r_recv(subreq, state);
 117         TALLOC_FREE(subreq);
 118         if (!composite_is_ok(state->ctx)) return;
 119         state->ctx->status = state->c.out.result;
 120         if (!composite_is_ok(state->ctx)) return;
 121
 122         state->domain_handle = talloc(state, struct policy_handle);
 123         if (composite_nomem(state->domain_handle, state->ctx)) return;
 124
 125         state->o.in.connect_handle = state->connect_handle;
 126         state->o.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
 127         state->o.in.sid = state->sid;
 128         state->o.out.domain_handle = state->domain_handle;
 129
 130         subreq = dcerpc_samr_OpenDomain_r_send(state,
 131                                                state->ctx->event_ctx,
 132                                                state->samr_pipe->binding_handle,
 133                                                &state->o);
 134         if (composite_nomem(subreq, state->ctx)) return;
 135         tevent_req_set_callback(subreq, connect_samr_recv_open, state);
 136 }
 137
 138 static void connect_samr_recv_open(struct tevent_req *subreq)
 139 {
 140         struct connect_samr_state *state =
 141                 tevent_req_callback_data(subreq,
 142                 struct connect_samr_state);
 143
 144         state->ctx->status = dcerpc_samr_OpenDomain_r_recv(subreq, state);
 145         TALLOC_FREE(subreq);
 146         if (!composite_is_ok(state->ctx)) return;
 147         state->ctx->status = state->o.out.result;
 148         if (!composite_is_ok(state->ctx)) return;
 149
 150         composite_done(state->ctx);
 151 }
 152
 153 NTSTATUS wb_connect_samr_recv(struct composite_context *c,
 154                              TALLOC_CTX *mem_ctx,
 155                              struct dcerpc_pipe **samr_pipe,
 156                              struct policy_handle *connect_handle,
 157                              struct policy_handle *domain_handle)
 158 {
 159         NTSTATUS status = composite_wait(c);
 160         if (NT_STATUS_IS_OK(status)) {
 161                 struct connect_samr_state *state =
 162                         talloc_get_type(c->private_data,
 163                                         struct connect_samr_state);
 164                 *samr_pipe = talloc_steal(mem_ctx, state->samr_pipe);
 165                 *connect_handle = *state->connect_handle;
 166                 *domain_handle = *state->domain_handle;
 167         }
 168         talloc_free(c);
 169         return status;
 170 }
 171