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
  30 /* Helper to initialize LSA with a specific auth methods. Verify by opening
  31  * the LSA policy. */
  32
  33 struct init_lsa_state {
  34         struct composite_context *ctx;
  35         struct dcerpc_pipe *lsa_pipe;
  36
  37         uint8_t auth_type;
  38         struct cli_credentials *creds;
  39
  40         struct lsa_ObjectAttribute objectattr;
  41         struct lsa_OpenPolicy2 openpolicy;
  42         struct policy_handle *handle;
  43 };
  44
  45 static void init_lsa_recv_pipe(struct composite_context *ctx);
  46 static void init_lsa_recv_openpol(struct tevent_req *subreq);
  47
  48 struct composite_context *wb_init_lsa_send(TALLOC_CTX *mem_ctx,
  49                                            struct wbsrv_domain *domain)
  50 {
  51         struct composite_context *result, *ctx;
  52         struct init_lsa_state *state;
  53
  54         result = composite_create(mem_ctx, domain->netlogon_pipe->conn->event_ctx);
  55         if (result == NULL) goto failed;
  56
  57         state = talloc(result, struct init_lsa_state);
  58         if (state == NULL) goto failed;
  59         state->ctx = result;
  60         result->private_data = state;
  61
  62         /* this will make the secondary connection on the same IPC$ share,
  63            secured with SPNEGO or NTLMSSP */
  64         ctx = dcerpc_secondary_auth_connection_send(domain->netlogon_pipe,
  65                                                     domain->lsa_binding,
  66                                                     &ndr_table_lsarpc,
  67                                                     domain->libnet_ctx->cred,
  68                                                     domain->libnet_ctx->lp_ctx);
  69         composite_continue(state->ctx, ctx, init_lsa_recv_pipe, state);
  70         return result;
  71
  72  failed:
  73         talloc_free(result);
  74         return NULL;
  75 }
  76
  77 static void init_lsa_recv_pipe(struct composite_context *ctx)
  78 {
  79         struct init_lsa_state *state =
  80                 talloc_get_type(ctx->async.private_data,
  81                                 struct init_lsa_state);
  82         struct tevent_req *subreq;
  83
  84         state->ctx->status = dcerpc_secondary_auth_connection_recv(ctx, state,
  85                                                                    &state->lsa_pipe);
  86         if (!composite_is_ok(state->ctx)) return;
  87
  88         state->handle = talloc(state, struct policy_handle);
  89         if (composite_nomem(state->handle, state->ctx)) return;
  90
  91         state->openpolicy.in.system_name =
  92                 talloc_asprintf(state, "\\\\%s",
  93                                 dcerpc_server_name(state->lsa_pipe));
  94         ZERO_STRUCT(state->objectattr);
  95         state->openpolicy.in.attr = &state->objectattr;
  96         state->openpolicy.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
  97         state->openpolicy.out.handle = state->handle;
  98
  99         subreq = dcerpc_lsa_OpenPolicy2_r_send(state,
 100                                                state->ctx->event_ctx,
 101                                                state->lsa_pipe->binding_handle,
 102                                                &state->openpolicy);
 103         if (composite_nomem(subreq, state->ctx)) return;
 104         tevent_req_set_callback(subreq, init_lsa_recv_openpol, state);
 105 }
 106
 107 static void init_lsa_recv_openpol(struct tevent_req *subreq)
 108 {
 109         struct init_lsa_state *state =
 110                 tevent_req_callback_data(subreq,
 111                 struct init_lsa_state);
 112
 113         state->ctx->status = dcerpc_lsa_OpenPolicy2_r_recv(subreq, state);
 114         TALLOC_FREE(subreq);
 115         if (!composite_is_ok(state->ctx)) return;
 116         state->ctx->status = state->openpolicy.out.result;
 117         if (!composite_is_ok(state->ctx)) return;
 118
 119         composite_done(state->ctx);
 120 }
 121
 122 NTSTATUS wb_init_lsa_recv(struct composite_context *c,
 123                           TALLOC_CTX *mem_ctx,
 124                           struct dcerpc_pipe **lsa_pipe,
 125                           struct policy_handle **lsa_policy)
 126 {
 127         NTSTATUS status = composite_wait(c);
 128         if (NT_STATUS_IS_OK(status)) {
 129                 struct init_lsa_state *state =
 130                         talloc_get_type(c->private_data,
 131                                         struct init_lsa_state);
 132                 *lsa_pipe = talloc_steal(mem_ctx, state->lsa_pipe);
 133                 *lsa_policy = talloc_steal(mem_ctx, state->handle);
 134         }
 135         talloc_free(c);
 136         return status;
 137 }
 138