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samba-mirror/source3/lib/privileges.c
Volker Lendecke 8a24c39d76 r4731: Fix the build
(This used to be commit 340d7f3173)
2007-10-10 10:53:51 -05:00

563 lines
16 KiB
C

/*
Unix SMB/CIFS implementation.
Privileges handling functions
Copyright (C) Jean François Micouleau 1998-2001
Copyright (C) Simo Sorce 2002-2003
Copyright (C) Gerald (Jerry) Carter 2004
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_"
#define ALLOC_CHECK(ptr, err, label, str) do { if ((ptr) == NULL) \
{ DEBUG(0, ("%s: out of memory!\n", str)); err = NT_STATUS_NO_MEMORY; goto label; } } while(0)
PRIVS privs[] = {
{SE_NETWORK_LOGON, "SeNetworkLogonRight", "Access this computer from the network"},
{SE_INTERACTIVE_LOGON, "SeInteractiveLogonRight", "Log on locally"},
{SE_BATCH_LOGON, "SeBatchLogonRight", "Log on as a batch job"},
{SE_SERVICE_LOGON, "SeServiceLogonRight", "Log on as a service"},
{SE_MACHINE_ACCOUNT, "SeMachineAccountPrivilege", "Add machines to domain"},
{SE_PRINT_OPERATOR, "SePrintOperatorPrivilege", "Printer Admin"},
{SE_ADD_USERS, "SeAddUsersPrivilege", "Add users and groups to the domain"},
{SE_END, "", ""}
};
#if 0 /* not needed currently */
PRIVS privs[] = {
{SE_ASSIGN_PRIMARY_TOKEN, "SeAssignPrimaryTokenPrivilege", "Assign Primary Token"},
{SE_CREATE_TOKEN, "SeCreateTokenPrivilege", "Create Token"},
{SE_LOCK_MEMORY, "SeLockMemoryPrivilege", "Lock Memory"},
{SE_INCREASE_QUOTA, "SeIncreaseQuotaPrivilege", "Increase Quota"},
{SE_UNSOLICITED_INPUT, "SeUnsolicitedInputPrivilege", "Unsolicited Input"},
{SE_MACHINE_ACCOUNT, "SeMachineAccountPrivilege", "Can add Machine Accounts to the Domain"},
{SE_TCB, "SeTcbPrivilege", "Act as part of the operating system"},
{SE_SECURITY, "SeSecurityPrivilege", "Security Privilege"},
{SE_TAKE_OWNERSHIP, "SeTakeOwnershipPrivilege", "Take Ownership Privilege"},
{SE_LOAD_DRIVER, "SeLocalDriverPrivilege", "Local Driver Privilege"},
{SE_SYSTEM_PROFILE, "SeSystemProfilePrivilege", "System Profile Privilege"},
{SE_SYSTEM_TIME, "SeSystemtimePrivilege", "System Time"},
{SE_PROF_SINGLE_PROCESS, "SeProfileSingleProcessPrivilege", "Profile Single Process Privilege"},
{SE_INC_BASE_PRIORITY, "SeIncreaseBasePriorityPrivilege", "Increase Base Priority Privilege"},
{SE_CREATE_PAGEFILE, "SeCreatePagefilePrivilege", "Create Pagefile Privilege"},
{SE_CREATE_PERMANENT, "SeCreatePermanentPrivilege", "Create Permanent"},
{SE_BACKUP, "SeBackupPrivilege", "Backup Privilege"},
{SE_RESTORE, "SeRestorePrivilege", "Restore Privilege"},
{SE_SHUTDOWN, "SeShutdownPrivilege", "Shutdown Privilege"},
{SE_DEBUG, "SeDebugPrivilege", "Debug Privilege"},
{SE_AUDIT, "SeAuditPrivilege", "Audit"},
{SE_SYSTEM_ENVIRONMENT, "SeSystemEnvironmentPrivilege", "System Environment Privilege"},
{SE_CHANGE_NOTIFY, "SeChangeNotifyPrivilege", "Change Notify"},
{SE_REMOTE_SHUTDOWN, "SeRemoteShutdownPrivilege", "Remote Shutdown Privilege"},
{SE_UNDOCK, "SeUndockPrivilege", "Undock"},
{SE_SYNC_AGENT, "SeSynchronizationAgentPrivilege", "Synchronization Agent"},
{SE_ENABLE_DELEGATION, "SeEnableDelegationPrivilege", "Enable Delegation"},
{SE_PRINT_OPERATOR, "SePrintOperatorPrivilege", "Printer Operator"},
{SE_ADD_USERS, "SeAddUsersPrivilege", "Add Users"},
{SE_ALL_PRIVS, "SeAllPrivileges", "All Privileges"}
{SE_END, "", ""}
};
#endif
typedef struct priv_sid_list {
uint32 se_priv;
SID_LIST sids;
} PRIV_SID_LIST;
/***************************************************************************
Retrieve the privilege mask (set) for a given SID
****************************************************************************/
static uint32 get_privileges( const DOM_SID *sid )
{
TDB_CONTEXT *tdb = get_account_pol_tdb();
fstring keystr;
uint32 priv_mask;
if ( !tdb )
return 0;
fstr_sprintf( keystr, "%s%s", PRIVPREFIX, sid_string_static(sid) );
if ( !tdb_fetch_uint32( tdb, keystr, &priv_mask ) ) {
DEBUG(3,("get_privileges: No privileges assigned to SID [%s]\n",
sid_string_static(sid)));
return 0;
}
return priv_mask;
}
/***************************************************************************
Store the privilege mask (set) for a given SID
****************************************************************************/
static BOOL set_privileges( const DOM_SID *sid, uint32 mask )
{
TDB_CONTEXT *tdb = get_account_pol_tdb();
fstring keystr;
if ( !tdb )
return False;
fstr_sprintf( keystr, "%s%s", PRIVPREFIX, sid_string_static(sid) );
return tdb_store_uint32( tdb, keystr, mask );
}
/****************************************************************************
check if the privilege is in the privilege list
****************************************************************************/
static BOOL check_priv_in_privilege(PRIVILEGE_SET *priv_set, LUID_ATTR set)
{
int i;
if ( !priv_set )
return False;
for ( i = 0; i < priv_set->count; i++ ) {
LUID_ATTR *cur_set;
cur_set = &priv_set->set[i];
/* check only the low and high part. Checking the attr
field has no meaning */
if ( (cur_set->luid.low == set.luid.low)
&& (cur_set->luid.high == set.luid.high) )
{
return True;
}
}
return False;
}
/****************************************************************************
add a privilege to a privilege array
****************************************************************************/
static NTSTATUS add_privilege(PRIVILEGE_SET *priv_set, LUID_ATTR set)
{
NTSTATUS ret;
LUID_ATTR *new_set;
/* check if the privilege is not already in the list */
if ( check_priv_in_privilege(priv_set, set) )
return NT_STATUS_OK;
/* 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);
ALLOC_CHECK(new_set, ret, done, "add_privilege");
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;
ret = NT_STATUS_OK;
done:
return ret;
}
/*********************************************************************
Generate the LUID_ATTR structure based on a bitmask
*********************************************************************/
static LUID_ATTR get_privilege_luid( uint32 mask )
{
LUID_ATTR priv_luid;
priv_luid.attr = 0;
priv_luid.luid.high = 0;
priv_luid.luid.low = mask;
return priv_luid;
}
/*********************************************************************
Convert a privilege mask to an LUID_ATTR[] and add the privileges to
the PRIVILEGE_SET
*********************************************************************/
static void add_privilege_set( PRIVILEGE_SET *privset, uint32 mask )
{
LUID_ATTR luid;
int i;
for (i=0; privs[i].se_priv != SE_END; i++) {
/* skip if the privilege is not part of the mask */
if ( !(mask & privs[i].se_priv) )
continue;
/* remove the bit from the mask */
mask &= ~privs[i].se_priv;
luid = get_privilege_luid( privs[i].se_priv );
add_privilege( privset, luid );
}
/* log an error if we have anything left at this point */
if ( mask )
DEBUG(0,("add_privilege_set: leftover bits! [0x%x]\n", mask ));
}
/*********************************************************************
get a list of all privleges for all sids the in list
*********************************************************************/
void get_privileges_for_sids(PRIVILEGE_SET *privset, DOM_SID *slist, int scount)
{
uint32 priv_mask;
int i;
for ( i=0; i<scount; i++ ) {
priv_mask = get_privileges( &slist[i] );
/* don't add unless we actually have a privilege assigned */
if ( priv_mask == 0 )
continue;
DEBUG(5,("get_privileges_for_sids: sid = %s, privilege mask = 0x%x\n",
sid_string_static(&slist[i]), priv_mask));
add_privilege_set( privset, priv_mask );
}
}
/*********************************************************************
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 = state;
int prefixlen = strlen(PRIVPREFIX);
DOM_SID sid;
fstring sid_string;
/* 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 ( priv->se_priv != SE_NONE ) {
uint32 mask = SVAL(data.dptr, 0);
/* if the SID does not have the specified privilege
then just return */
if ( !(mask & priv->se_priv) )
return 0;
}
fstrcpy( sid_string, &key.dptr[strlen(PRIVPREFIX)] );
if ( !string_to_sid(&sid, sid_string) ) {
DEBUG(0,("travsersal_fn_enum__acct: Could not convert SID [%s]\n",
sid_string));
return 0;
}
add_sid_to_array( &sid, &priv->sids.list, &priv->sids.count );
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;
ZERO_STRUCT(priv);
priv.se_priv = SE_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;
}
/***************************************************************************
Retrieve the SIDs assigned to a given privilege
****************************************************************************/
NTSTATUS priv_get_sids(const char *privname, DOM_SID **sids, int *num_sids)
{
TDB_CONTEXT *tdb = get_account_pol_tdb();
PRIV_SID_LIST priv;
ZERO_STRUCT(priv);
priv.se_priv =
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, uint32 priv_mask)
{
uint32 old_mask, new_mask;
old_mask = get_privileges( sid );
new_mask = old_mask | priv_mask;
DEBUG(10,("grant_privilege: %s, orig priv set = 0x%x, new privilege set = 0x%x\n",
sid_string_static(sid), old_mask, new_mask ));
return set_privileges( sid, new_mask );
}
/***************************************************************************
Remove privilege from sid
****************************************************************************/
BOOL revoke_privilege(const DOM_SID *sid, uint32 priv_mask)
{
uint32 old_mask, new_mask;
old_mask = get_privileges( sid );
new_mask = old_mask & ~priv_mask;
DEBUG(10,("revoke_privilege: %s, orig priv set = 0x%x, new priv set = 0x%x\n",
sid_string_static(sid), old_mask, new_mask ));
return set_privileges( sid, new_mask );
}
/***************************************************************************
Retrieve the SIDs assigned to a given privilege
****************************************************************************/
NTSTATUS privilege_create_account(const DOM_SID *sid )
{
return ( grant_privilege( sid, SE_NONE ) ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL);
}
/****************************************************************************
initialise a privilege list and set the talloc context
****************************************************************************/
NTSTATUS privilege_set_init(PRIVILEGE_SET *priv_set)
{
NTSTATUS ret;
TALLOC_CTX *mem_ctx;
ZERO_STRUCTP( priv_set );
mem_ctx = talloc_init("privilege set");
ALLOC_CHECK(mem_ctx, ret, done, "init_privilege");
priv_set->mem_ctx = mem_ctx;
ret = NT_STATUS_OK;
done:
return ret;
}
/****************************************************************************
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)
{
NTSTATUS ret;
int i;
/* don't crash if the source pointer is NULL (since we don't
do priviledges now anyways) */
if ( !old_la )
return NT_STATUS_OK;
*new_la = TALLOC_ARRAY(mem_ctx, LUID_ATTR, count);
ALLOC_CHECK(new_la, ret, done, "dupalloc_luid_attr");
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;
}
ret = NT_STATUS_OK;
done:
return ret;
}
/****************************************************************************
Performa deep copy of a PRIVILEGE_SET structure. Assumes an initialized
destination structure.
*****************************************************************************/
BOOL dup_privilege_set( PRIVILEGE_SET *dest, PRIVILEGE_SET *src )
{
NTSTATUS result;
if ( !dest || !src )
return False;
result = dup_luid_attr( dest->mem_ctx, &dest->set, src->set, src->count );
if ( !NT_STATUS_IS_OK(result) ) {
DEBUG(0,("dup_privilege_set: Failed to dup LUID_ATTR array [%s]\n",
nt_errstr(result) ));
return False;
}
dest->control = src->control;
dest->count = src->count;
return True;
}
/****************************************************************************
Does the user have the specified privilege ? We only deal with one privilege
at a time here.
*****************************************************************************/
BOOL user_has_privilege(NT_USER_TOKEN *token, uint32 privilege)
{
return check_priv_in_privilege( &token->privileges, get_privilege_luid(privilege) );
}
/****************************************************************************
Convert a LUID to a named string
****************************************************************************/
char* luid_to_privilege_name(const LUID *set)
{
static fstring name;
int i = 0;
if (set->high != 0)
return NULL;
for ( i=0; privs[i].se_priv!=SE_END; i++ ) {
if (set->low == privs[i].se_priv) {
fstrcpy(name, privs[i].name);
return name;
}
}
return NULL;
}
/****************************************************************************
Convert an LUID to a 32-bit mask
****************************************************************************/
uint32 luid_to_privilege_mask(const LUID *set)
{
int i = 0;
if (set->high != 0)
return SE_END;
for ( i=0; privs[i].se_priv != SE_END; i++ ) {
if (set->low == privs[i].se_priv)
return privs[i].se_priv;
}
return SE_END;
}
/*******************************************************************
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; privs[count].se_priv != SE_END; count++ ) ;
return count;
}