/*

   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"

#include "../libcli/security/security.h"

struct rid_name_map {

  uint32_t rid;

  const char *name;

};

struct sid_name_map_info

{

  const struct 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 local_authority_users[] = {

  { 0, "Local" },

  { 1, "Console Logon" },

  { 0, NULL}};

static const struct rid_name_map creator_owner_users[] = {

  { 0, "Creator Owner" },

  { 1, "Creator Group" },

  { 2, "Creator Owner Server" },

  { 3, "Creator Group Server" },

  { 4, "Owner Rights" },

  { 0, NULL}};

static const struct rid_name_map nt_authority_users[] = {

  {  1, "Dialup" },

  {  2, "Network"},

  {  3, "Batch"},

  {  4, "Interactive"},

  {  6, "Service"},

  {  7, "Anonymous Logon"},

  {  8, "Proxy"},

  {  9, "Enterprise Domain Controllers"},

  { 10, "Self"},

  { 11, "Authenticated Users"},

  { 12, "Restricted"},

  { 13, "Terminal Server User"},

  { 14, "Remote Interactive Logon"},

  { 15, "This Organization"},

  { 17, "IUSR"},

  { 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_Local_Authority, "", local_authority_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 struct dom_sid *sid, const char **name)

{

  int i;

  for (i=0; special_domains[i].sid != NULL; i++) {

    if (dom_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 struct dom_sid *sid)

{

  struct dom_sid dom_sid;

  sid_copy(&dom_sid, sid);

  sid_split_rid(&dom_sid, NULL);

  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 struct dom_sid *sid,

        const char **domain, const char **name)

{

  int i;

  struct dom_sid dom_sid;

  uint32_t rid;

  const struct rid_name_map *users = NULL;

  struct dom_sid_buf buf;

  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 (dom_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",

         dom_sid_str_buf(sid, &buf)));

    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",

       dom_sid_str_buf(sid, &buf)));

  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,

         struct dom_sid *sid, const char **pdomain)

{

  int i, j;

  const char *domain = *pdomain;

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

  for (i=0; special_domains[i].sid != NULL; i++) {

    const struct rid_name_map *users =

      special_domains[i].known_users;

    if (domain[0] != '\0') {

      if (!strequal(domain, special_domains[i].name)) {

        continue;

      }

    }

    if (users == NULL)

      continue;

    for (j=0; users[j].name != NULL; j++) {

      if ( strequal(users[j].name, name) ) {

        sid_compose(sid, special_domains[i].sid,

              users[j].rid);

        *pdomain = talloc_strdup(

          mem_ctx, special_domains[i].name);

        return True;

      }

    }

  }

  return False;

}