source: branches/samba-3.5.x/source4/winbind/wb_connect_lsa.c

/* 
   Unix SMB/CIFS implementation.

   Connect to the LSA pipe, given an smbcli_tree and possibly some
   credentials. Try ntlmssp, schannel and anon in that order.

   Copyright (C) Volker Lendecke 2005
   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2007
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "libcli/composite/composite.h"

#include "libcli/raw/libcliraw.h"
#include "librpc/gen_ndr/ndr_lsa_c.h"
#include "winbind/wb_server.h"

/* Helper to initialize LSA with a specific auth methods. Verify by opening
 * the LSA policy. */

struct init_lsa_state {
        struct composite_context *ctx;
        struct dcerpc_pipe *lsa_pipe;

        uint8_t auth_type;
        struct cli_credentials *creds;

        struct lsa_ObjectAttribute objectattr;
        struct lsa_OpenPolicy2 openpolicy;
        struct policy_handle *handle;
};

static void init_lsa_recv_pipe(struct composite_context *ctx);
static void init_lsa_recv_openpol(struct rpc_request *req);

struct composite_context *wb_init_lsa_send(TALLOC_CTX *mem_ctx,
                                           struct wbsrv_domain *domain)
{
        struct composite_context *result, *ctx;
        struct init_lsa_state *state;

        result = composite_create(mem_ctx, domain->netlogon_pipe->conn->event_ctx);
        if (result == NULL) goto failed;

        state = talloc(result, struct init_lsa_state);
        if (state == NULL) goto failed;
        state->ctx = result;
        result->private_data = state;

        /* this will make the secondary connection on the same IPC$ share, 
           secured with SPNEGO or NTLMSSP */
        ctx = dcerpc_secondary_auth_connection_send(domain->netlogon_pipe,
                                                    domain->lsa_binding,
                                                    &ndr_table_lsarpc,
                                                    domain->libnet_ctx->cred,
                                                    domain->libnet_ctx->lp_ctx);
        composite_continue(state->ctx, ctx, init_lsa_recv_pipe, state);
        return result;
        
 failed:
        talloc_free(result);
        return NULL;
}

static void init_lsa_recv_pipe(struct composite_context *ctx)
{
        struct rpc_request *req;
        struct init_lsa_state *state =
                talloc_get_type(ctx->async.private_data,
                                struct init_lsa_state);

        state->ctx->status = dcerpc_secondary_auth_connection_recv(ctx, state,
                                                                   &state->lsa_pipe);
        if (!composite_is_ok(state->ctx)) return;
                        
        state->handle = talloc(state, struct policy_handle);
        if (composite_nomem(state->handle, state->ctx)) return;

        state->openpolicy.in.system_name =
                talloc_asprintf(state, "\\\\%s",
                                dcerpc_server_name(state->lsa_pipe));
        ZERO_STRUCT(state->objectattr);
        state->openpolicy.in.attr = &state->objectattr;
        state->openpolicy.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
        state->openpolicy.out.handle = state->handle;

        req = dcerpc_lsa_OpenPolicy2_send(state->lsa_pipe, state,
                                          &state->openpolicy);
        composite_continue_rpc(state->ctx, req, init_lsa_recv_openpol, state);
}

static void init_lsa_recv_openpol(struct rpc_request *req)
{
        struct init_lsa_state *state =
                talloc_get_type(req->async.private_data,
                                struct init_lsa_state);

        state->ctx->status = dcerpc_ndr_request_recv(req);
        if (!composite_is_ok(state->ctx)) return;
        state->ctx->status = state->openpolicy.out.result;
        if (!composite_is_ok(state->ctx)) return;

        composite_done(state->ctx);
}

NTSTATUS wb_init_lsa_recv(struct composite_context *c,
                          TALLOC_CTX *mem_ctx,
                          struct dcerpc_pipe **lsa_pipe,
                          struct policy_handle **lsa_policy)
{
        NTSTATUS status = composite_wait(c);
        if (NT_STATUS_IS_OK(status)) {
                struct init_lsa_state *state =
                        talloc_get_type(c->private_data,
                                        struct init_lsa_state);
                *lsa_pipe = talloc_steal(mem_ctx, state->lsa_pipe);
                *lsa_policy = talloc_steal(mem_ctx, state->handle);
        }
        talloc_free(c);
        return status;
}