lib/privileges.c

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/*
   Unix SMB/CIFS implementation.
   Privileges handling functions
   Copyright (C) Jean Fran巽ois Micouleau       1998-2001
   Copyright (C) Simo Sorce                     2002-2003
   Copyright (C) Gerald (Jerry) Carter          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 2 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

 
#include "includes.h"

#define PRIVPREFIX              "PRIV_"

static const SE_PRIV se_priv_all  = SE_ALL_PRIVS;
static const SE_PRIV se_priv_end  = SE_END;

/* Define variables for all privileges so we can use the
   SE_PRIV* in the various se_priv_XXX() functions */

const SE_PRIV se_priv_none       = SE_NONE;
const SE_PRIV se_machine_account = SE_MACHINE_ACCOUNT;
const SE_PRIV se_print_operator  = SE_PRINT_OPERATOR;
const SE_PRIV se_add_users       = SE_ADD_USERS;
const SE_PRIV se_disk_operators  = SE_DISK_OPERATOR;
const SE_PRIV se_remote_shutdown = SE_REMOTE_SHUTDOWN;
const SE_PRIV se_restore         = SE_RESTORE;
const SE_PRIV se_take_ownership  = SE_TAKE_OWNERSHIP;

/********************************************************************
 This is a list of privileges reported by a WIndows 2000 SP4 AD DC
 just for reference purposes (and I know the LUID is not guaranteed 
 across reboots):

            SeCreateTokenPrivilege  Create a token object ( 0x0, 0x2 )
     SeAssignPrimaryTokenPrivilege  Replace a process level token ( 0x0, 0x3 )
             SeLockMemoryPrivilege  Lock pages in memory ( 0x0, 0x4 )
          SeIncreaseQuotaPrivilege  Increase quotas ( 0x0, 0x5 )
         SeMachineAccountPrivilege  Add workstations to domain ( 0x0, 0x6 )
                    SeTcbPrivilege  Act as part of the operating system ( 0x0, 0x7 )
               SeSecurityPrivilege  Manage auditing and security log ( 0x0, 0x8 )
          SeTakeOwnershipPrivilege  Take ownership of files or other objects ( 0x0, 0x9 )
             SeLoadDriverPrivilege  Load and unload device drivers ( 0x0, 0xa )
          SeSystemProfilePrivilege  Profile system performance ( 0x0, 0xb )
             SeSystemtimePrivilege  Change the system time ( 0x0, 0xc )
   SeProfileSingleProcessPrivilege  Profile single process ( 0x0, 0xd )
   SeIncreaseBasePriorityPrivilege  Increase scheduling priority ( 0x0, 0xe )
         SeCreatePagefilePrivilege  Create a pagefile ( 0x0, 0xf )
        SeCreatePermanentPrivilege  Create permanent shared objects ( 0x0, 0x10 )
                 SeBackupPrivilege  Back up files and directories ( 0x0, 0x11 )
                SeRestorePrivilege  Restore files and directories ( 0x0, 0x12 )
               SeShutdownPrivilege  Shut down the system ( 0x0, 0x13 )
                  SeDebugPrivilege  Debug programs ( 0x0, 0x14 )
                  SeAuditPrivilege  Generate security audits ( 0x0, 0x15 )
      SeSystemEnvironmentPrivilege  Modify firmware environment values ( 0x0, 0x16 )
           SeChangeNotifyPrivilege  Bypass traverse checking ( 0x0, 0x17 )
         SeRemoteShutdownPrivilege  Force shutdown from a remote system ( 0x0, 0x18 )
                 SeUndockPrivilege  Remove computer from docking station ( 0x0, 0x19 )
              SeSyncAgentPrivilege  Synchronize directory service data ( 0x0, 0x1a )
       SeEnableDelegationPrivilege  Enable computer and user accounts to be trusted for delegation ( 0x0, 0x1b )
           SeManageVolumePrivilege  Perform volume maintenance tasks ( 0x0, 0x1c )
            SeImpersonatePrivilege  Impersonate a client after authentication ( 0x0, 0x1d )
           SeCreateGlobalPrivilege  Create global objects ( 0x0, 0x1e )

 ********************************************************************/

/* we have to define the LUID here due to a horrible check by printmig.exe
   that requires the SeBackupPrivilege match what is in Windows.  So match
   those that we implement and start Samba privileges at 0x1001 */
   
PRIVS privs[] = {
#if 0   /* usrmgr will display these twice if you include them.  We don't 
           use them but we'll keep the bitmasks reserved in privileges.h anyways */
           
        {SE_NETWORK_LOGON,      "SeNetworkLogonRight",          "Access this computer from network",       { 0x0, 0x0 }},
        {SE_INTERACTIVE_LOGON,  "SeInteractiveLogonRight",      "Log on locally",                          { 0x0, 0x0 }},
        {SE_BATCH_LOGON,        "SeBatchLogonRight",            "Log on as a batch job",                   { 0x0, 0x0 }},
        {SE_SERVICE_LOGON,      "SeServiceLogonRight",          "Log on as a service",                     { 0x0, 0x0 }},
#endif
        {SE_MACHINE_ACCOUNT,    "SeMachineAccountPrivilege",    "Add machines to domain",                  { 0x0, 0x0006 }},
        {SE_TAKE_OWNERSHIP,     "SeTakeOwnershipPrivilege",     "Take ownership of files or other objects",{ 0x0, 0x0009 }},
        {SE_BACKUP,             "SeBackupPrivilege",            "Back up files and directories",           { 0x0, 0x0011 }},
        {SE_RESTORE,            "SeRestorePrivilege",           "Restore files and directories",           { 0x0, 0x0012 }},
        {SE_REMOTE_SHUTDOWN,    "SeRemoteShutdownPrivilege",    "Force shutdown from a remote system",     { 0x0, 0x0018 }},
        
        {SE_PRINT_OPERATOR,     "SePrintOperatorPrivilege",     "Manage printers",                         { 0x0, 0x1001 }},
        {SE_ADD_USERS,          "SeAddUsersPrivilege",          "Add users and groups to the domain",      { 0x0, 0x1002 }},
        {SE_DISK_OPERATOR,      "SeDiskOperatorPrivilege",      "Manage disk shares",                      { 0x0, 0x1003 }},

        {SE_END, "", "", { 0x0, 0x0 }}
};

typedef struct {
        size_t count;
        DOM_SID *list;
} SID_LIST;

typedef struct {
        SE_PRIV privilege;
        SID_LIST sids;
} PRIV_SID_LIST;

/***************************************************************************
 copy an SE_PRIV structure
****************************************************************************/

BOOL se_priv_copy( SE_PRIV *dst, const SE_PRIV *src )
{
        if ( !dst || !src )
                return False;
                
        memcpy( dst, src, sizeof(SE_PRIV) );
        
        return True;
}

/***************************************************************************
 combine 2 SE_PRIV structures and store the resulting set in mew_mask
****************************************************************************/

void se_priv_add( SE_PRIV *mask, const SE_PRIV *addpriv )
{
        int i;

        for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
                mask->mask[i] |= addpriv->mask[i];
        }
}

/***************************************************************************
 remove one SE_PRIV sytucture from another and store the resulting set 
 in mew_mask
****************************************************************************/

void se_priv_remove( SE_PRIV *mask, const SE_PRIV *removepriv )
{       
        int i;

        for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
                mask->mask[i] &= ~removepriv->mask[i];
        }
}

/***************************************************************************
 invert a given SE_PRIV and store the set in new_mask
****************************************************************************/

static void se_priv_invert( SE_PRIV *new_mask, const SE_PRIV *mask )
{       
        SE_PRIV allprivs;
        
        se_priv_copy( &allprivs, &se_priv_all );
        se_priv_remove( &allprivs, mask );
        se_priv_copy( new_mask, &allprivs );
}

/***************************************************************************
 check if 2 SE_PRIV structure are equal
****************************************************************************/

static BOOL se_priv_equal( const SE_PRIV *mask1, const SE_PRIV *mask2 )
{       
        return ( memcmp(mask1, mask2, sizeof(SE_PRIV)) == 0 );
}

/***************************************************************************
 check if a SE_PRIV has any assigned privileges
****************************************************************************/

static BOOL se_priv_empty( const SE_PRIV *mask )
{
        SE_PRIV p1;
        int i;
        
        se_priv_copy( &p1, mask );

        for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
                p1.mask[i] &= se_priv_all.mask[i];
        }
        
        return se_priv_equal( &p1, &se_priv_none );
}

/*********************************************************************
 Lookup the SE_PRIV value for a privilege name 
*********************************************************************/

BOOL se_priv_from_name( const char *name, SE_PRIV *mask )
{
        int i;

        for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
                if ( strequal( privs[i].name, name ) ) {
                        se_priv_copy( mask, &privs[i].se_priv );
                        return True;
                }
        }

        return False;
}

/***************************************************************************
 dump an SE_PRIV structure to the log files
****************************************************************************/

void dump_se_priv( int dbg_cl, int dbg_lvl, const SE_PRIV *mask )
{
        int i;
        
        DEBUGADDC( dbg_cl, dbg_lvl,("SE_PRIV "));
        
        for ( i=0; i<SE_PRIV_MASKSIZE; i++ ) {
                DEBUGADDC( dbg_cl, dbg_lvl,(" 0x%x", mask->mask[i] ));
        }
                
        DEBUGADDC( dbg_cl, dbg_lvl, ("\n"));
}

/***************************************************************************
 Retrieve the privilege mask (set) for a given SID
****************************************************************************/

static BOOL get_privileges( const DOM_SID *sid, SE_PRIV *mask )
{
        TDB_CONTEXT *tdb = get_account_pol_tdb();
        fstring keystr;
        TDB_DATA key, data;

        /* Fail if the admin has not enable privileges */
        
        if ( !lp_enable_privileges() ) {
                return False;
        }
        
        if ( !tdb )
                return False;

        /* PRIV_<SID> (NULL terminated) as the key */
        
        fstr_sprintf( keystr, "%s%s", PRIVPREFIX, sid_string_static(sid) );
        key.dptr = keystr;
        key.dsize = strlen(keystr) + 1;

        data = tdb_fetch( tdb, key );
        
        if ( !data.dptr ) {
                DEBUG(3,("get_privileges: No privileges assigned to SID [%s]\n",
                        sid_string_static(sid)));
                return False;
        }
        
        SMB_ASSERT( data.dsize == sizeof( SE_PRIV ) );
        
        se_priv_copy( mask, (SE_PRIV*)data.dptr );
        SAFE_FREE(data.dptr);

        return True;
}

/***************************************************************************
 Store the privilege mask (set) for a given SID
****************************************************************************/

static BOOL set_privileges( const DOM_SID *sid, SE_PRIV *mask )
{
        TDB_CONTEXT *tdb = get_account_pol_tdb();
        fstring keystr;
        TDB_DATA key, data;
        
        if ( !lp_enable_privileges() )
                return False;

        if ( !tdb )
                return False;

        if ( !sid || (sid->num_auths == 0) ) {
                DEBUG(0,("set_privileges: Refusing to store empty SID!\n"));
                return False;
        }

        /* PRIV_<SID> (NULL terminated) as the key */
        
        fstr_sprintf( keystr, "%s%s", PRIVPREFIX, sid_string_static(sid) );
        key.dptr = keystr;
        key.dsize = strlen(keystr) + 1;
        
        /* no packing.  static size structure, just write it out */
        
        data.dptr  = (char*)mask;
        data.dsize = sizeof(SE_PRIV);

        return ( tdb_store(tdb, key, data, TDB_REPLACE) != -1 );
}

/****************************************************************************
 check if the privilege is in the privilege list
****************************************************************************/

static BOOL is_privilege_assigned( const SE_PRIV *privileges,
                                   const SE_PRIV *check )
{
        SE_PRIV p1, p2;

        if ( !privileges || !check )
                return False;
        
        /* everyone has privileges if you aren't checking for any */
        
        if ( se_priv_empty( check ) ) {
                DEBUG(1,("is_privilege_assigned: no privileges in check_mask!\n"));
                return True;
        }
        
        se_priv_copy( &p1, check );
        
        /* invert the SE_PRIV we want to check for and remove that from the 
           original set.  If we are left with the SE_PRIV we are checking 
           for then return True */
           
        se_priv_invert( &p1, check );
        se_priv_copy( &p2, privileges );
        se_priv_remove( &p2, &p1 );
        
        return se_priv_equal( &p2, check );
}

/****************************************************************************
 check if the privilege is in the privilege list
****************************************************************************/

static BOOL is_any_privilege_assigned( SE_PRIV *privileges, const SE_PRIV *check )
{
        SE_PRIV p1, p2;

        if ( !privileges || !check )
                return False;
        
        /* everyone has privileges if you aren't checking for any */
        
        if ( se_priv_empty( check ) ) {
                DEBUG(1,("is_any_privilege_assigned: no privileges in check_mask!\n"));
                return True;
        }
        
        se_priv_copy( &p1, check );
        
        /* invert the SE_PRIV we want to check for and remove that from the 
           original set.  If we are left with the SE_PRIV we are checking 
           for then return True */
           
        se_priv_invert( &p1, check );
        se_priv_copy( &p2, privileges );
        se_priv_remove( &p2, &p1 );
        
        /* see if we have any bits left */
        
        return !se_priv_empty( &p2 );
}

/****************************************************************************
 add a privilege to a privilege array
 ****************************************************************************/

static BOOL privilege_set_add(PRIVILEGE_SET *priv_set, LUID_ATTR set)
{
        LUID_ATTR *new_set;

        /* we can allocate memory to add the new privilege */

        new_set = TALLOC_REALLOC_ARRAY(priv_set->mem_ctx, priv_set->set, LUID_ATTR, priv_set->count + 1);
        if ( !new_set ) {
                DEBUG(0,("privilege_set_add: failed to allocate memory!\n"));
                return False;
        }       

        new_set[priv_set->count].luid.high = set.luid.high;
        new_set[priv_set->count].luid.low = set.luid.low;
        new_set[priv_set->count].attr = set.attr;

        priv_set->count++;
        priv_set->set = new_set;

        return True;
}

/*********************************************************************
 Generate the LUID_ATTR structure based on a bitmask
 The assumption here is that the privilege has already been validated
 so we are guaranteed to find it in the list. 
*********************************************************************/

LUID_ATTR get_privilege_luid( SE_PRIV *mask )
{
        LUID_ATTR priv_luid;
        int i;

        ZERO_STRUCT( priv_luid );
        
        for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
        
                if ( se_priv_equal( &privs[i].se_priv, mask ) ) {
                        priv_luid.luid = privs[i].luid;
                        break;
                }
        }

        return priv_luid;
}

/*********************************************************************
 Generate the LUID_ATTR structure based on a bitmask
*********************************************************************/

const char* get_privilege_dispname( const char *name )
{
        int i;

        for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
        
                if ( strequal( privs[i].name, name ) ) {
                        return privs[i].description;
                }
        }

        return NULL;
}

/*********************************************************************
 get a list of all privleges for all sids the in list
*********************************************************************/

BOOL get_privileges_for_sids(SE_PRIV *privileges, DOM_SID *slist, int scount)
{
        SE_PRIV mask;
        int i;
        BOOL found = False;

        se_priv_copy( privileges, &se_priv_none );
        
        for ( i=0; i<scount; i++ ) {
                /* don't add unless we actually have a privilege assigned */

                if ( !get_privileges( &slist[i], &mask ) )
                        continue;

                DEBUG(5,("get_privileges_for_sids: sid = %s\nPrivilege set:\n", 
                        sid_string_static(&slist[i])));
                dump_se_priv( DBGC_ALL, 5, &mask );
                        
                se_priv_add( privileges, &mask );
                found = True;
        }

        return found;
}


/*********************************************************************
 travseral functions for privilege_enumerate_accounts
*********************************************************************/

static int priv_traverse_fn(TDB_CONTEXT *t, TDB_DATA key, TDB_DATA data, void *state)
{
        PRIV_SID_LIST *priv = (PRIV_SID_LIST *)state;
        int  prefixlen = strlen(PRIVPREFIX);
        DOM_SID sid;
        fstring sid_string;
        
        /* easy check first */
        
        if ( data.dsize != sizeof(SE_PRIV) )
                return 0;

        /* check we have a PRIV_+SID entry */

        if ( strncmp(key.dptr, PRIVPREFIX, prefixlen) != 0)
                return 0;
                
        /* check to see if we are looking for a particular privilege */

        if ( !se_priv_equal(&priv->privilege, &se_priv_none) ) {
                SE_PRIV mask;
                
                se_priv_copy( &mask, (SE_PRIV*)data.dptr );
                
                /* if the SID does not have the specified privilege 
                   then just return */
                   
                if ( !is_privilege_assigned( &mask, &priv->privilege) )
                        return 0;
        }
                
        fstrcpy( sid_string, &key.dptr[strlen(PRIVPREFIX)] );

        /* this is a last ditch safety check to preventing returning
           and invalid SID (i've somehow run into this on development branches) */

        if ( strcmp( "S-0-0", sid_string ) == 0 )
                return 0;

        if ( !string_to_sid(&sid, sid_string) ) {
                DEBUG(0,("travsersal_fn_enum__acct: Could not convert SID [%s]\n",
                        sid_string));
                return 0;
        }

        if (!add_sid_to_array( NULL, &sid, &priv->sids.list, &priv->sids.count )) {
                return 0;
        }
        
        return 0;
}

/*********************************************************************
 Retreive list of privileged SIDs (for _lsa_enumerate_accounts()
*********************************************************************/

NTSTATUS privilege_enumerate_accounts(DOM_SID **sids, int *num_sids)
{
        TDB_CONTEXT *tdb = get_account_pol_tdb();
        PRIV_SID_LIST priv;
        
        if (!tdb) {
                return NT_STATUS_ACCESS_DENIED;
        }

        ZERO_STRUCT(priv);

        se_priv_copy( &priv.privilege, &se_priv_none );

        tdb_traverse( tdb, priv_traverse_fn, &priv);

        /* give the memory away; caller will free */
        
        *sids      = priv.sids.list;
        *num_sids  = priv.sids.count;

        return NT_STATUS_OK;
}

/***************************************************************************
 Add privilege to sid
****************************************************************************/

BOOL grant_privilege(const DOM_SID *sid, const SE_PRIV *priv_mask)
{
        SE_PRIV old_mask, new_mask;
        
        ZERO_STRUCT( old_mask );
        ZERO_STRUCT( new_mask );

        if ( get_privileges( sid, &old_mask ) )
                se_priv_copy( &new_mask, &old_mask );
        else
                se_priv_copy( &new_mask, &se_priv_none );

        se_priv_add( &new_mask, priv_mask );

        DEBUG(10,("grant_privilege: %s\n", sid_string_static(sid)));
        
        DEBUGADD( 10, ("original privilege mask:\n"));
        dump_se_priv( DBGC_ALL, 10, &old_mask );
        
        DEBUGADD( 10, ("new privilege mask:\n"));
        dump_se_priv( DBGC_ALL, 10, &new_mask );
        
        return set_privileges( sid, &new_mask );
}

/*********************************************************************
 Add a privilege based on its name
*********************************************************************/

BOOL grant_privilege_by_name(DOM_SID *sid, const char *name)
{
        int i;

        for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
                if ( strequal(privs[i].name, name) ) {
                        return grant_privilege( sid, &privs[i].se_priv );
                }
        }

        DEBUG(3, ("grant_privilege_by_name: No Such Privilege Found (%s)\n", name));

        return False;
}

/***************************************************************************
 Remove privilege from sid
****************************************************************************/

BOOL revoke_privilege(const DOM_SID *sid, const SE_PRIV *priv_mask)
{
        SE_PRIV mask;
        
        /* if the user has no privileges, then we can't revoke any */
        
        if ( !get_privileges( sid, &mask ) )
                return True;
        
        DEBUG(10,("revoke_privilege: %s\n", sid_string_static(sid)));
        
        DEBUGADD( 10, ("original privilege mask:\n"));
        dump_se_priv( DBGC_ALL, 10, &mask );

        se_priv_remove( &mask, priv_mask );
        
        DEBUGADD( 10, ("new privilege mask:\n"));
        dump_se_priv( DBGC_ALL, 10, &mask );
        
        return set_privileges( sid, &mask );
}

/*********************************************************************
 Revoke all privileges
*********************************************************************/

BOOL revoke_all_privileges( DOM_SID *sid )
{
        return revoke_privilege( sid, &se_priv_all );
}

/*********************************************************************
 Add a privilege based on its name
*********************************************************************/

BOOL revoke_privilege_by_name(DOM_SID *sid, const char *name)
{
        int i;

        for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
                if ( strequal(privs[i].name, name) ) {
                        return revoke_privilege( sid, &privs[i].se_priv );
                }
        }

        DEBUG(3, ("revoke_privilege_by_name: No Such Privilege Found (%s)\n", name));

        return False;
}

/***************************************************************************
 Retrieve the SIDs assigned to a given privilege
****************************************************************************/

NTSTATUS privilege_create_account(const DOM_SID *sid )
{
        return ( grant_privilege(sid, &se_priv_none) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL);
}

/****************************************************************************
 initialise a privilege list and set the talloc context 
 ****************************************************************************/
 
NTSTATUS privilege_set_init(PRIVILEGE_SET *priv_set)
{
        TALLOC_CTX *mem_ctx;
        
        ZERO_STRUCTP( priv_set );

        mem_ctx = talloc_init("privilege set");
        if ( !mem_ctx ) {
                DEBUG(0,("privilege_set_init: failed to initialize talloc ctx!\n"));
                return NT_STATUS_NO_MEMORY;
        }

        priv_set->mem_ctx = mem_ctx;

        return NT_STATUS_OK;
}

/****************************************************************************
  initialise a privilege list and with someone else's talloc context 
****************************************************************************/

NTSTATUS privilege_set_init_by_ctx(TALLOC_CTX *mem_ctx, PRIVILEGE_SET *priv_set)
{
        ZERO_STRUCTP( priv_set );
        
        priv_set->mem_ctx = mem_ctx;
        priv_set->ext_ctx = True;

        return NT_STATUS_OK;
}

/****************************************************************************
 Free all memory used by a PRIVILEGE_SET
****************************************************************************/

void privilege_set_free(PRIVILEGE_SET *priv_set)
{
        if ( !priv_set )
                return;

        if ( !( priv_set->ext_ctx ) )
                talloc_destroy( priv_set->mem_ctx );

        ZERO_STRUCTP( priv_set );
}

/****************************************************************************
 duplicate alloc luid_attr
 ****************************************************************************/

NTSTATUS dup_luid_attr(TALLOC_CTX *mem_ctx, LUID_ATTR **new_la, LUID_ATTR *old_la, int count)
{
        int i;

        if ( !old_la )
                return NT_STATUS_OK;

        if (count) {
                *new_la = TALLOC_ARRAY(mem_ctx, LUID_ATTR, count);
                if ( !*new_la ) {
                        DEBUG(0,("dup_luid_attr: failed to alloc new LUID_ATTR array [%d]\n", count));
                        return NT_STATUS_NO_MEMORY;
                }
        } else {
                *new_la = NULL;
        }

        for (i=0; i<count; i++) {
                (*new_la)[i].luid.high = old_la[i].luid.high;
                (*new_la)[i].luid.low = old_la[i].luid.low;
                (*new_la)[i].attr = old_la[i].attr;
        }
        
        return NT_STATUS_OK;
}

/****************************************************************************
 Does the user have the specified privilege ?  We only deal with one privilege
 at a time here.
*****************************************************************************/

BOOL user_has_privileges(const NT_USER_TOKEN *token, const SE_PRIV *privilege)
{
        if ( !token )
                return False;

        return is_privilege_assigned( &token->privileges, privilege );
}

/****************************************************************************
 Does the user have any of the specified privileges ?  We only deal with one privilege
 at a time here.
*****************************************************************************/

BOOL user_has_any_privilege(NT_USER_TOKEN *token, const SE_PRIV *privilege)
{
        if ( !token )
                return False;

        return is_any_privilege_assigned( &token->privileges, privilege );
}

/****************************************************************************
 Convert a LUID to a named string
****************************************************************************/

char* luid_to_privilege_name(const LUID *set)
{
        static fstring name;
        int i;

        if (set->high != 0)
                return NULL;

        for ( i=0; !se_priv_equal(&privs[i].se_priv, &se_priv_end); i++ ) {
                if ( set->low == privs[i].luid.low ) {
                        fstrcpy( name, privs[i].name );
                        return name;
                }
        }
        
        return NULL;
}

/*******************************************************************
 return the number of elements in the privlege array
*******************************************************************/

int count_all_privileges( void )
{
        static int count;
        
        if ( count )
                return count;

        /* loop over the array and count it */  
        for ( count=0; !se_priv_equal(&privs[count].se_priv, &se_priv_end); count++ ) ;

        return count;
}

/*******************************************************************
*******************************************************************/

BOOL se_priv_to_privilege_set( PRIVILEGE_SET *set, SE_PRIV *mask )
{
        int i;
        uint32 num_privs = count_all_privileges();
        LUID_ATTR luid;
        
        luid.attr = 0;
        luid.luid.high = 0;
        
        for ( i=0; i<num_privs; i++ ) {
                if ( !is_privilege_assigned(mask, &privs[i].se_priv) )
                        continue;
                
                luid.luid = privs[i].luid;
                
                if ( !privilege_set_add( set, luid ) )
                        return False;
        }

        return True;
}

/*******************************************************************
*******************************************************************/

static BOOL luid_to_se_priv( LUID *luid, SE_PRIV *mask )
{
        int i;
        uint32 num_privs = count_all_privileges();
        
        for ( i=0; i<num_privs; i++ ) {
                if ( luid->low == privs[i].luid.low ) {
                        se_priv_copy( mask, &privs[i].se_priv );
                        return True;
                }
        }

        return False;
}

/*******************************************************************
*******************************************************************/

BOOL privilege_set_to_se_priv( SE_PRIV *mask, PRIVILEGE_SET *privset )
{
        int i;
        
        ZERO_STRUCTP( mask );
        
        for ( i=0; i<privset->count; i++ ) {
                SE_PRIV r;
        
                /* sanity check for invalid privilege.  we really
                   only care about the low 32 bits */
                   
                if ( privset->set[i].luid.high != 0 )
                        return False;
                
                if ( luid_to_se_priv( &privset->set[i].luid, &r ) )             
                        se_priv_add( mask, &r );
        }

        return True;
}

/*******************************************************************
*******************************************************************/

BOOL is_privileged_sid( const DOM_SID *sid )
{
        SE_PRIV mask;
        
        return get_privileges( sid, &mask );
}

/*******************************************************************
*******************************************************************/

BOOL grant_all_privileges( const DOM_SID *sid )
{
        int i;
        SE_PRIV mask;
        uint32 num_privs = count_all_privileges();

        se_priv_copy( &mask, &se_priv_none );
        
        for ( i=0; i<num_privs; i++ ) {
                se_priv_add(&mask, &privs[i].se_priv); 
        }

        return grant_privilege( sid, &mask );
}

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