source: trunk/server/source3/utils/netlookup.c

/*
   Unix SMB/CIFS implementation.

   Name lookup.

   Copyright (C) Jeremy Allison 2005

   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 "utils/net.h"
#include "rpc_client/cli_pipe.h"
#include "../librpc/gen_ndr/ndr_lsa.h"
#include "rpc_client/cli_lsarpc.h"
#include "libsmb/libsmb.h"

/********************************************************
 Connection cachine struct. Goes away when ctx destroyed.
********************************************************/

struct con_struct {
        bool failed_connect;
        NTSTATUS err;
        struct cli_state *cli;
        struct rpc_pipe_client *lsapipe;
        struct policy_handle pol;
};

static struct con_struct *cs;

/********************************************************
 Close connection on context destruction.
********************************************************/

static int cs_destructor(struct con_struct *p)
{
        if (cs->cli) {
                cli_shutdown(cs->cli);
        }
        cs = NULL;
        return 0;
}

/********************************************************
 Create the connection to localhost.
********************************************************/

static struct con_struct *create_cs(struct net_context *c,
                                    TALLOC_CTX *ctx, NTSTATUS *perr)
{
        NTSTATUS nt_status;
        struct sockaddr_storage loopback_ss;

        *perr = NT_STATUS_OK;

        if (!interpret_string_addr(&loopback_ss, "127.0.0.1", AI_NUMERICHOST)) {
                *perr = NT_STATUS_INVALID_PARAMETER;
                return NULL;
        }

        if (cs) {
                if (cs->failed_connect) {
                        *perr = cs->err;
                        return NULL;
                }
                return cs;
        }

        cs = TALLOC_P(ctx, struct con_struct);
        if (!cs) {
                *perr = NT_STATUS_NO_MEMORY;
                return NULL;
        }

        ZERO_STRUCTP(cs);
        talloc_set_destructor(cs, cs_destructor);

        /* Connect to localhost with given username/password. */
        /* JRA. Pretty sure we can just do this anonymously.... */
#if 0
        if (!opt_password && !opt_machine_pass) {
                char *pass = getpass("Password:");
                if (pass) {
                        opt_password = SMB_STRDUP(pass);
                }
        }
#endif

        nt_status = cli_full_connection(&cs->cli, global_myname(), global_myname(),
                                        &loopback_ss, 0,
                                        "IPC$", "IPC",
#if 0
                                        c->opt_user_name,
                                        c->opt_workgroup,
                                        c->opt_password,
#else
                                        "",
                                        c->opt_workgroup,
                                        "",
#endif
                                        0,
                                        Undefined);

        if (!NT_STATUS_IS_OK(nt_status)) {
                DEBUG(2,("create_cs: Connect failed. Error was %s\n", nt_errstr(nt_status)));
                cs->failed_connect = true;
                cs->err = nt_status;
                *perr = nt_status;
                return NULL;
        }

        nt_status = cli_rpc_pipe_open_noauth(cs->cli,
                                        &ndr_table_lsarpc.syntax_id,
                                        &cs->lsapipe);

        if (!NT_STATUS_IS_OK(nt_status)) {
                DEBUG(2,("create_cs: open LSA pipe failed. Error was %s\n", nt_errstr(nt_status)));
                cs->failed_connect = true;
                cs->err = nt_status;
                *perr = nt_status;
                return NULL;
        }

        nt_status = rpccli_lsa_open_policy(cs->lsapipe, ctx, true,
                                SEC_FLAG_MAXIMUM_ALLOWED,
                                &cs->pol);

        if (!NT_STATUS_IS_OK(nt_status)) {
                DEBUG(2,("create_cs: rpccli_lsa_open_policy failed. Error was %s\n", nt_errstr(nt_status)));
                cs->failed_connect = true;
                cs->err = nt_status;
                *perr = nt_status;
                return NULL;
        }

        return cs;
}

/********************************************************
 Do a lookup_sids call to localhost.
 Check if the local machine is authoritative for this sid. We can't
 check if this is our SID as that's stored in the root-read-only
 secrets.tdb.
 The local smbd will also ask winbindd for us, so we don't have to.
********************************************************/

NTSTATUS net_lookup_name_from_sid(struct net_context *c,
                                TALLOC_CTX *ctx,
                                struct dom_sid *psid,
                                const char **ppdomain,
                                const char **ppname)
{
        NTSTATUS nt_status;
        struct con_struct *csp = NULL;
        char **domains;
        char **names;
        enum lsa_SidType *types;

        *ppdomain = NULL;
        *ppname = NULL;

        csp = create_cs(c, ctx, &nt_status);
        if (csp == NULL) {
                return nt_status;
        }

        nt_status = rpccli_lsa_lookup_sids(csp->lsapipe, ctx,
                                                &csp->pol,
                                                1, psid,
                                                &domains,
                                                &names,
                                                &types);

        if (!NT_STATUS_IS_OK(nt_status)) {
                return nt_status;
        }

        *ppdomain = domains[0];
        *ppname = names[0];
        /* Don't care about type here. */

        /* Converted OK */
        return NT_STATUS_OK;
}

/********************************************************
 Do a lookup_names call to localhost.
********************************************************/

NTSTATUS net_lookup_sid_from_name(struct net_context *c, TALLOC_CTX *ctx,
                                  const char *full_name, struct dom_sid *pret_sid)
{
        NTSTATUS nt_status;
        struct con_struct *csp = NULL;
        struct dom_sid *sids = NULL;
        enum lsa_SidType *types = NULL;

        csp = create_cs(c, ctx, &nt_status);
        if (csp == NULL) {
                return nt_status;
        }

        nt_status = rpccli_lsa_lookup_names(csp->lsapipe, ctx,
                                                &csp->pol,
                                                1,
                                                &full_name,
                                                NULL, 1,
                                                &sids, &types);

        if (!NT_STATUS_IS_OK(nt_status)) {
                return nt_status;
        }

        *pret_sid = sids[0];

        /* Converted OK */
        return NT_STATUS_OK;
}