source/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 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 "libcli/composite/composite.h"
  26
  27 #include "libcli/raw/libcliraw.h"
  28 #include "libcli/security/security.h"
  29 #include "librpc/gen_ndr/ndr_samr_c.h"
  30 #include "winbind/wb_server.h"
  31
  32
  33 /* Helper to initialize SAMR with a specific auth methods. Verify by opening
  34  * the SAM handle */
  35
  36 struct connect_samr_state {
  37         struct composite_context *ctx;
  38         struct dom_sid *sid;
  39
  40         struct dcerpc_pipe *samr_pipe;
  41         struct policy_handle *connect_handle;
  42         struct policy_handle *domain_handle;
  43
  44         struct samr_Connect2 c;
  45         struct samr_OpenDomain o;
  46 };
  47
  48 static void connect_samr_recv_pipe(struct composite_context *ctx);
  49 static void connect_samr_recv_conn(struct rpc_request *req);
  50 static void connect_samr_recv_open(struct rpc_request *req);
  51
  52 struct composite_context *wb_connect_samr_send(TALLOC_CTX *mem_ctx,
  53                                            struct wbsrv_domain *domain)
  54 {
  55         struct composite_context *result, *ctx;
  56         struct connect_samr_state *state;
  57
  58         result = composite_create(mem_ctx, domain->netlogon_pipe->conn->event_ctx);
  59         if (result == NULL) goto failed;
  60
  61         state = talloc(result, struct connect_samr_state);
  62         if (state == NULL) goto failed;
  63         state->ctx = result;
  64         result->private_data = state;
  65
  66         state->sid = dom_sid_dup(state, domain->info->sid);
  67         if (state->sid == NULL) goto failed;
  68
  69         /* this will make the secondary connection on the same IPC$ share,
  70            secured with SPNEGO, NTLMSSP or SCHANNEL */
  71         ctx = dcerpc_secondary_connection_send(domain->netlogon_pipe,
  72                                                domain->samr_binding);
  73         composite_continue(state->ctx, ctx, connect_samr_recv_pipe, state);
  74         return result;
  75
  76  failed:
  77         talloc_free(result);
  78         return NULL;
  79 }
  80
  81 static void connect_samr_recv_pipe(struct composite_context *ctx)
  82 {
  83         struct rpc_request *req;
  84         struct connect_samr_state *state =
  85                 talloc_get_type(ctx->async.private_data,
  86                                 struct connect_samr_state);
  87
  88         state->ctx->status = dcerpc_secondary_connection_recv(ctx,
  89                                                               &state->samr_pipe);
  90         if (!composite_is_ok(state->ctx)) return;
  91
  92         state->connect_handle = talloc(state, struct policy_handle);
  93         if (composite_nomem(state->connect_handle, state->ctx)) return;
  94
  95         state->c.in.system_name =
  96                 talloc_asprintf(state, "\\\\%s",
  97                                 dcerpc_server_name(state->samr_pipe));
  98         state->c.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
  99         state->c.out.connect_handle = state->connect_handle;
 100
 101         req = dcerpc_samr_Connect2_send(state->samr_pipe, state, &state->c);
 102         composite_continue_rpc(state->ctx, req, connect_samr_recv_conn, state);
 103         return;
 104 }
 105
 106 static void connect_samr_recv_conn(struct rpc_request *req)
 107 {
 108         struct connect_samr_state *state =
 109                 talloc_get_type(req->async.private_data,
 110                                 struct connect_samr_state);
 111
 112         state->ctx->status = dcerpc_ndr_request_recv(req);
 113         if (!composite_is_ok(state->ctx)) return;
 114         state->ctx->status = state->c.out.result;
 115         if (!composite_is_ok(state->ctx)) return;
 116
 117         state->domain_handle = talloc(state, struct policy_handle);
 118         if (composite_nomem(state->domain_handle, state->ctx)) return;
 119
 120         state->o.in.connect_handle = state->connect_handle;
 121         state->o.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
 122         state->o.in.sid = state->sid;
 123         state->o.out.domain_handle = state->domain_handle;
 124
 125         req = dcerpc_samr_OpenDomain_send(state->samr_pipe, state, &state->o);
 126         composite_continue_rpc(state->ctx, req,
 127                                connect_samr_recv_open, state);
 128 }
 129
 130 static void connect_samr_recv_open(struct rpc_request *req)
 131 {
 132         struct connect_samr_state *state =
 133                 talloc_get_type(req->async.private_data,
 134                                 struct connect_samr_state);
 135
 136         state->ctx->status = dcerpc_ndr_request_recv(req);
 137         if (!composite_is_ok(state->ctx)) return;
 138         state->ctx->status = state->o.out.result;
 139         if (!composite_is_ok(state->ctx)) return;
 140
 141         composite_done(state->ctx);
 142 }
 143
 144 NTSTATUS wb_connect_samr_recv(struct composite_context *c,
 145                              TALLOC_CTX *mem_ctx,
 146                              struct dcerpc_pipe **samr_pipe,
 147                              struct policy_handle **connect_handle,
 148                              struct policy_handle **domain_handle)
 149 {
 150         NTSTATUS status = composite_wait(c);
 151         if (NT_STATUS_IS_OK(status)) {
 152                 struct connect_samr_state *state =
 153                         talloc_get_type(c->private_data,
 154                                         struct connect_samr_state);
 155                 *samr_pipe = talloc_steal(mem_ctx, state->samr_pipe);
 156                 *connect_handle = talloc_steal(mem_ctx, state->connect_handle);
 157                 *domain_handle = talloc_steal(mem_ctx, state->domain_handle);
 158         }
 159         talloc_free(c);
 160         return status;
 161 }
 162