source: branches/samba-3.3.x/source/passdb/util_wellknown.c

/* 
   Unix SMB/CIFS implementation.
   Lookup routines for well-known SIDs
   Copyright (C) Andrew Tridgell 1992-1998
   Copyright (C) Luke Kenneth Caseson Leighton 1998-1999
   Copyright (C) Jeremy Allison  1999
   Copyright (C) Volker Lendecke 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"

struct rid_name_map {
        uint32 rid;
        const char *name;
};

struct sid_name_map_info
{
        const DOM_SID *sid;
        const char *name;
        const struct rid_name_map *known_users;
};

static const struct rid_name_map everyone_users[] = {
        { 0, "Everyone" },
        { 0, NULL}};

static const struct rid_name_map creator_owner_users[] = {
        { 0, "Creator Owner" },
        { 1, "Creator Group" },
        { 0, NULL}};

static const struct rid_name_map nt_authority_users[] = {
        {  1, "Dialup" },
        {  2, "Network"},
        {  3, "Batch"},
        {  4, "Interactive"},
        {  6, "Service"},
        {  7, "AnonymousLogon"},
        {  8, "Proxy"},
        {  9, "ServerLogon"},
        { 10, "Self"},
        { 11, "Authenticated Users"},
        { 12, "Restricted"},
        { 13, "Terminal Server User"},
        { 14, "Remote Interactive Logon"},
        { 15, "This Organization"},
        { 18, "SYSTEM"},
        { 19, "Local Service"},
        { 20, "Network Service"},
        {  0,  NULL}};

static struct sid_name_map_info special_domains[] = {
        { &global_sid_World_Domain, "", everyone_users },
        { &global_sid_Creator_Owner_Domain, "", creator_owner_users },
        { &global_sid_NT_Authority, "NT Authority", nt_authority_users },
        { NULL, NULL, NULL }};

bool sid_check_is_wellknown_domain(const DOM_SID *sid, const char **name)
{
        int i;

        for (i=0; special_domains[i].sid != NULL; i++) {
                if (sid_equal(sid, special_domains[i].sid)) {
                        if (name != NULL) {
                                *name = special_domains[i].name;
                        }
                        return True;
                }
        }
        return False;
}

bool sid_check_is_in_wellknown_domain(const DOM_SID *sid)
{
        DOM_SID dom_sid;
        uint32 rid;

        sid_copy(&dom_sid, sid);
        sid_split_rid(&dom_sid, &rid);
        
        return sid_check_is_wellknown_domain(&dom_sid, NULL);
}

/**************************************************************************
 Looks up a known username from one of the known domains.
***************************************************************************/

bool lookup_wellknown_sid(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
                          const char **domain, const char **name)
{
        int i;
        DOM_SID dom_sid;
        uint32 rid;
        const struct rid_name_map *users = NULL;

        sid_copy(&dom_sid, sid);
        if (!sid_split_rid(&dom_sid, &rid)) {
                DEBUG(2, ("Could not split rid from SID\n"));
                return False;
        }

        for (i=0; special_domains[i].sid != NULL; i++) {
                if (sid_equal(&dom_sid, special_domains[i].sid)) {
                        *domain = talloc_strdup(mem_ctx,
                                                special_domains[i].name);
                        users = special_domains[i].known_users;
                        break;
                }
        }

        if (users == NULL) {
                DEBUG(10, ("SID %s is no special sid\n", sid_string_dbg(sid)));
                return False;
        }

        for (i=0; users[i].name != NULL; i++) {
                if (rid == users[i].rid) {
                        *name = talloc_strdup(mem_ctx, users[i].name);
                        return True;
                }
        }

        DEBUG(10, ("RID of special SID %s not found\n", sid_string_dbg(sid)));

        return False;
}

/**************************************************************************
 Try and map a name to one of the well known SIDs.
***************************************************************************/

bool lookup_wellknown_name(TALLOC_CTX *mem_ctx, const char *name,
                           DOM_SID *sid, const char **domain)
{
        int i, j;

        DEBUG(10,("map_name_to_wellknown_sid: looking up %s\n", name));

        for (i=0; special_domains[i].sid != NULL; i++) {
                const struct rid_name_map *users =
                        special_domains[i].known_users;

                if (users == NULL)
                        continue;

                for (j=0; users[j].name != NULL; j++) {
                        if ( strequal(users[j].name, name) ) {
                                sid_copy(sid, special_domains[i].sid);
                                sid_append_rid(sid, users[j].rid);
                                *domain = talloc_strdup(
                                        mem_ctx, special_domains[i].name);
                                return True;
                        }
                }
        }

        return False;
}