source4/winbind/wb_connect_lsa.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Connect to the LSA pipe, given an smbcli_tree and possibly some
   5    credentials. Try ntlmssp, schannel and anon in that order.
   6
   7    Copyright (C) Volker Lendecke 2005
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2007
   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 3 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, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "libcli/composite/composite.h"
  26
  27 #include "librpc/gen_ndr/ndr_lsa_c.h"
  28 #include "winbind/wb_server.h"
  29 #include "smbd/service_task.h"
  30
  31 /* Helper to initialize LSA with a specific auth methods. Verify by opening
  32  * the LSA policy. */
  33
  34 struct init_lsa_state {
  35         struct composite_context *ctx;
  36         struct dcerpc_pipe *lsa_pipe;
  37
  38         uint8_t auth_type;
  39         struct cli_credentials *creds;
  40
  41         struct lsa_ObjectAttribute objectattr;
  42         struct lsa_OpenPolicy2 openpolicy;
  43         struct policy_handle *handle;
  44 };
  45
  46 static void init_lsa_recv_pipe(struct composite_context *ctx);
  47 static void init_lsa_recv_openpol(struct tevent_req *subreq);
  48
  49 struct composite_context *wb_init_lsa_send(TALLOC_CTX *mem_ctx,
  50                                            struct wbsrv_domain *domain)
  51 {
  52         struct composite_context *result, *ctx;
  53         struct init_lsa_state *state;
  54
  55         result = composite_create(mem_ctx, domain->service->task->event_ctx);
  56         if (result == NULL) goto failed;
  57
  58         state = talloc(result, struct init_lsa_state);
  59         if (state == NULL) goto failed;
  60         state->ctx = result;
  61         result->private_data = state;
  62
  63         /* this will make the secondary connection on the same IPC$ share,
  64            secured with SPNEGO or NTLMSSP */
  65         ctx = dcerpc_secondary_auth_connection_send(domain->netlogon_pipe,
  66                                                     domain->lsa_binding,
  67                                                     &ndr_table_lsarpc,
  68                                                     domain->libnet_ctx->cred,
  69                                                     domain->libnet_ctx->lp_ctx);
  70         composite_continue(state->ctx, ctx, init_lsa_recv_pipe, state);
  71         return result;
  72
  73  failed:
  74         talloc_free(result);
  75         return NULL;
  76 }
  77
  78 static void init_lsa_recv_pipe(struct composite_context *ctx)
  79 {
  80         struct init_lsa_state *state =
  81                 talloc_get_type(ctx->async.private_data,
  82                                 struct init_lsa_state);
  83         struct tevent_req *subreq;
  84
  85         state->ctx->status = dcerpc_secondary_auth_connection_recv(ctx, state,
  86                                                                    &state->lsa_pipe);
  87         if (!composite_is_ok(state->ctx)) return;
  88
  89         state->handle = talloc(state, struct policy_handle);
  90         if (composite_nomem(state->handle, state->ctx)) return;
  91
  92         state->openpolicy.in.system_name =
  93                 talloc_asprintf(state, "\\\\%s",
  94                                 dcerpc_server_name(state->lsa_pipe));
  95         ZERO_STRUCT(state->objectattr);
  96         state->openpolicy.in.attr = &state->objectattr;
  97         state->openpolicy.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
  98         state->openpolicy.out.handle = state->handle;
  99
 100         subreq = dcerpc_lsa_OpenPolicy2_r_send(state,
 101                                                state->ctx->event_ctx,
 102                                                state->lsa_pipe->binding_handle,
 103                                                &state->openpolicy);
 104         if (composite_nomem(subreq, state->ctx)) return;
 105         tevent_req_set_callback(subreq, init_lsa_recv_openpol, state);
 106 }
 107
 108 static void init_lsa_recv_openpol(struct tevent_req *subreq)
 109 {
 110         struct init_lsa_state *state =
 111                 tevent_req_callback_data(subreq,
 112                 struct init_lsa_state);
 113
 114         state->ctx->status = dcerpc_lsa_OpenPolicy2_r_recv(subreq, state);
 115         TALLOC_FREE(subreq);
 116         if (!composite_is_ok(state->ctx)) return;
 117         state->ctx->status = state->openpolicy.out.result;
 118         if (!composite_is_ok(state->ctx)) return;
 119
 120         composite_done(state->ctx);
 121 }
 122
 123 NTSTATUS wb_init_lsa_recv(struct composite_context *c,
 124                           TALLOC_CTX *mem_ctx,
 125                           struct dcerpc_pipe **lsa_pipe,
 126                           struct policy_handle **lsa_policy)
 127 {
 128         NTSTATUS status = composite_wait(c);
 129         if (NT_STATUS_IS_OK(status)) {
 130                 struct init_lsa_state *state =
 131                         talloc_get_type(c->private_data,
 132                                         struct init_lsa_state);
 133                 *lsa_pipe = talloc_steal(mem_ctx, state->lsa_pipe);
 134                 *lsa_policy = talloc_steal(mem_ctx, state->handle);
 135         }
 136         talloc_free(c);
 137         return status;
 138 }
 139