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 #include "smbd/service_task.h"
  30
  31
  32 /* Helper to initialize SAMR with a specific auth methods. Verify by opening
  33  * the SAM handle */
  34
  35 struct connect_samr_state {
  36         struct composite_context *ctx;
  37         struct dom_sid *sid;
  38
  39         struct dcerpc_pipe *samr_pipe;
  40         struct policy_handle *connect_handle;
  41         struct policy_handle *domain_handle;
  42
  43         struct samr_Connect2 c;
  44         struct samr_OpenDomain o;
  45 };
  46
  47 static void connect_samr_recv_pipe(struct composite_context *ctx);
  48 static void connect_samr_recv_conn(struct tevent_req *subreq);
  49 static void connect_samr_recv_open(struct tevent_req *subreq);
  50
  51 struct composite_context *wb_connect_samr_send(TALLOC_CTX *mem_ctx,
  52                                            struct wbsrv_domain *domain)
  53 {
  54         struct composite_context *result, *ctx;
  55         struct connect_samr_state *state;
  56
  57         result = composite_create(mem_ctx, domain->service->task->event_ctx);
  58         if (result == NULL) goto failed;
  59
  60         state = talloc(result, struct connect_samr_state);
  61         if (state == NULL) goto failed;
  62         state->ctx = result;
  63         result->private_data = state;
  64
  65         state->sid = dom_sid_dup(state, domain->info->sid);
  66         if (state->sid == NULL) goto failed;
  67
  68         /* this will make the secondary connection on the same IPC$ share,
  69            secured with SPNEGO, NTLMSSP or SCHANNEL */
  70         ctx = dcerpc_secondary_auth_connection_send(domain->netlogon_pipe,
  71                                                     domain->samr_binding,
  72                                                     &ndr_table_samr,
  73                                                     domain->libnet_ctx->cred,
  74                                                     domain->libnet_ctx->lp_ctx);
  75         composite_continue(state->ctx, ctx, connect_samr_recv_pipe, state);
  76         return result;
  77
  78  failed:
  79         talloc_free(result);
  80         return NULL;
  81 }
  82
  83 static void connect_samr_recv_pipe(struct composite_context *ctx)
  84 {
  85         struct connect_samr_state *state =
  86                 talloc_get_type(ctx->async.private_data,
  87                                 struct connect_samr_state);
  88         struct tevent_req *subreq;
  89
  90         state->ctx->status = dcerpc_secondary_auth_connection_recv(ctx, state,
  91                                                                    &state->samr_pipe);
  92         if (!composite_is_ok(state->ctx)) return;
  93
  94         state->connect_handle = talloc(state, struct policy_handle);
  95         if (composite_nomem(state->connect_handle, state->ctx)) return;
  96
  97         state->c.in.system_name =
  98                 talloc_asprintf(state, "\\\\%s",
  99                                 dcerpc_server_name(state->samr_pipe));
 100         state->c.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
 101         state->c.out.connect_handle = state->connect_handle;
 102
 103         subreq = dcerpc_samr_Connect2_r_send(state,
 104                                              state->ctx->event_ctx,
 105                                              state->samr_pipe->binding_handle,
 106                                              &state->c);
 107         if (composite_nomem(subreq, state->ctx)) return;
 108         tevent_req_set_callback(subreq, connect_samr_recv_conn, state);
 109 }
 110
 111 static void connect_samr_recv_conn(struct tevent_req *subreq)
 112 {
 113         struct connect_samr_state *state =
 114                 tevent_req_callback_data(subreq,
 115                 struct connect_samr_state);
 116
 117         state->ctx->status = dcerpc_samr_Connect2_r_recv(subreq, state);
 118         TALLOC_FREE(subreq);
 119         if (!composite_is_ok(state->ctx)) return;
 120         state->ctx->status = state->c.out.result;
 121         if (!composite_is_ok(state->ctx)) return;
 122
 123         state->domain_handle = talloc(state, struct policy_handle);
 124         if (composite_nomem(state->domain_handle, state->ctx)) return;
 125
 126         state->o.in.connect_handle = state->connect_handle;
 127         state->o.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
 128         state->o.in.sid = state->sid;
 129         state->o.out.domain_handle = state->domain_handle;
 130
 131         subreq = dcerpc_samr_OpenDomain_r_send(state,
 132                                                state->ctx->event_ctx,
 133                                                state->samr_pipe->binding_handle,
 134                                                &state->o);
 135         if (composite_nomem(subreq, state->ctx)) return;
 136         tevent_req_set_callback(subreq, connect_samr_recv_open, state);
 137 }
 138
 139 static void connect_samr_recv_open(struct tevent_req *subreq)
 140 {
 141         struct connect_samr_state *state =
 142                 tevent_req_callback_data(subreq,
 143                 struct connect_samr_state);
 144
 145         state->ctx->status = dcerpc_samr_OpenDomain_r_recv(subreq, state);
 146         TALLOC_FREE(subreq);
 147         if (!composite_is_ok(state->ctx)) return;
 148         state->ctx->status = state->o.out.result;
 149         if (!composite_is_ok(state->ctx)) return;
 150
 151         composite_done(state->ctx);
 152 }
 153
 154 NTSTATUS wb_connect_samr_recv(struct composite_context *c,
 155                              TALLOC_CTX *mem_ctx,
 156                              struct dcerpc_pipe **samr_pipe,
 157                              struct policy_handle *connect_handle,
 158                              struct policy_handle *domain_handle)
 159 {
 160         NTSTATUS status = composite_wait(c);
 161         if (NT_STATUS_IS_OK(status)) {
 162                 struct connect_samr_state *state =
 163                         talloc_get_type(c->private_data,
 164                                         struct connect_samr_state);
 165                 *samr_pipe = talloc_steal(mem_ctx, state->samr_pipe);
 166                 *connect_handle = *state->connect_handle;
 167                 *domain_handle = *state->domain_handle;
 168         }
 169         talloc_free(c);
 170         return status;
 171 }
 172