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samba-mirror/libcli/security/privileges.c

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/*
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 2005
Copyright (C) Michael Adam 2007
Copyright (C) Andrew Bartlett 2010
Copyright (C) Andrew Tridgell 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 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/>.
*/
/*
* Basic privileges functions (mask-operations and conversion
* functions between the different formats (se_priv, privset, luid)
* moved here * from lib/privileges.c to minimize linker deps.
*
* generally SID- and LUID-related code is left in lib/privileges.c
*
* some extra functions to hide privs array from lib/privileges.c
*/
#include "includes.h"
#include "libcli/security/privileges.h"
#include "librpc/gen_ndr/security.h"
/* The use of strcasecmp here is safe, all the comparison strings are ASCII */
#undef strcasecmp
const uint64_t se_priv_all = SE_ALL_PRIVS;
/* Define variables for all privileges so we can use the
uint64_t* in the various se_priv_XXX() functions */
const uint64_t se_priv_none = SE_NONE;
const uint64_t se_machine_account = SE_MACHINE_ACCOUNT;
const uint64_t se_print_operator = SE_PRINT_OPERATOR;
const uint64_t se_add_users = SE_ADD_USERS;
const uint64_t se_disk_operators = SE_DISK_OPERATOR;
const uint64_t se_remote_shutdown = SE_REMOTE_SHUTDOWN;
const uint64_t se_restore = SE_RESTORE;
const uint64_t se_take_ownership = SE_TAKE_OWNERSHIP;
#define NUM_SHORT_LIST_PRIVS 8
static const struct {
enum sec_privilege luid;
uint64_t privilege_mask;
const char *name;
const char *description;
} privs[] = {
{SEC_PRIV_MACHINE_ACCOUNT, SE_MACHINE_ACCOUNT, "SeMachineAccountPrivilege", "Add machines to domain"},
{SEC_PRIV_TAKE_OWNERSHIP, SE_TAKE_OWNERSHIP, "SeTakeOwnershipPrivilege", "Take ownership of files or other objects"},
{SEC_PRIV_BACKUP, SE_BACKUP, "SeBackupPrivilege", "Back up files and directories"},
{SEC_PRIV_RESTORE, SE_RESTORE, "SeRestorePrivilege", "Restore files and directories"},
{SEC_PRIV_REMOTE_SHUTDOWN, SE_REMOTE_SHUTDOWN, "SeRemoteShutdownPrivilege", "Force shutdown from a remote system"},
{SEC_PRIV_PRINT_OPERATOR, SE_PRINT_OPERATOR, "SePrintOperatorPrivilege", "Manage printers"},
{SEC_PRIV_ADD_USERS, SE_ADD_USERS, "SeAddUsersPrivilege", "Add users and groups to the domain"},
{SEC_PRIV_DISK_OPERATOR, SE_DISK_OPERATOR, "SeDiskOperatorPrivilege", "Manage disk shares"},
/* The list from here on was not displayed in the code from
* source3/ with the comment that usrmgr will display these
* next 2 twice if you include them. The source4/ code has
* always included them, but they do not appear in Windows
* 2008 R2.
Finally, the parameter 'short_list' determines if the short
or full list (including many other privileges) is used */
{SEC_PRIV_SECURITY,
SE_SECURITY,
"SeSecurityPrivilege",
"System security"},
{SEC_PRIV_SYSTEMTIME,
SE_SYSTEMTIME,
"SeSystemtimePrivilege",
"Set the system clock"},
{SEC_PRIV_SHUTDOWN,
SE_SHUTDOWN,
"SeShutdownPrivilege",
"Shutdown the system"},
{SEC_PRIV_DEBUG,
SE_DEBUG,
"SeDebugPrivilege",
"Debug processes"},
{SEC_PRIV_SYSTEM_ENVIRONMENT,
SE_SYSTEM_ENVIRONMENT,
"SeSystemEnvironmentPrivilege",
"Modify system environment"},
{SEC_PRIV_SYSTEM_PROFILE,
SE_SYSTEM_PROFILE,
"SeSystemProfilePrivilege",
"Profile the system"},
{SEC_PRIV_PROFILE_SINGLE_PROCESS,
SE_PROFILE_SINGLE_PROCESS,
"SeProfileSingleProcessPrivilege",
"Profile one process"},
{SEC_PRIV_INCREASE_BASE_PRIORITY,
SE_INCREASE_BASE_PRIORITY,
"SeIncreaseBasePriorityPrivilege",
"Increase base priority"},
{SEC_PRIV_LOAD_DRIVER,
SE_LOAD_DRIVER,
"SeLoadDriverPrivilege",
"Load drivers"},
{SEC_PRIV_CREATE_PAGEFILE,
SE_CREATE_PAGEFILE,
"SeCreatePagefilePrivilege",
"Create page files"},
{SEC_PRIV_INCREASE_QUOTA,
SE_INCREASE_QUOTA,
"SeIncreaseQuotaPrivilege",
"Increase quota"},
{SEC_PRIV_CHANGE_NOTIFY,
SE_CHANGE_NOTIFY,
"SeChangeNotifyPrivilege",
"Register for change notify"},
{SEC_PRIV_UNDOCK,
SE_UNDOCK,
"SeUndockPrivilege",
"Undock devices"},
{SEC_PRIV_MANAGE_VOLUME,
SE_MANAGE_VOLUME,
"SeManageVolumePrivilege",
"Manage system volumes"},
{SEC_PRIV_IMPERSONATE,
SE_IMPERSONATE,
"SeImpersonatePrivilege",
"Impersonate users"},
{SEC_PRIV_CREATE_GLOBAL,
SE_CREATE_GLOBAL,
"SeCreateGlobalPrivilege",
"Create global"},
{SEC_PRIV_ENABLE_DELEGATION,
SE_ENABLE_DELEGATION,
"SeEnableDelegationPrivilege",
"Enable Delegation"},
{SEC_PRIV_INTERACTIVE_LOGON,
SE_INTERACTIVE_LOGON,
"SeInteractiveLogonRight",
"Interactive logon"},
{SEC_PRIV_NETWORK_LOGON,
SE_NETWORK_LOGON,
"SeNetworkLogonRight",
"Network logon"},
{SEC_PRIV_REMOTE_INTERACTIVE_LOGON,
SE_REMOTE_INTERACTIVE_LOGON,
"SeRemoteInteractiveLogonRight",
"Remote Interactive logon"}
};
/***************************************************************************
copy an uint64_t privilege bitmap
****************************************************************************/
bool se_priv_copy( uint64_t *dst, const uint64_t *src )
{
if ( !dst || !src )
return false;
*dst = *src;
return true;
}
/***************************************************************************
put all valid privileges into a mask
****************************************************************************/
bool se_priv_put_all_privileges(uint64_t *privilege_mask)
{
int i;
uint32_t num_privs = ARRAY_SIZE(privs);
if (!se_priv_copy(privilege_mask, &se_priv_none)) {
return false;
}
for ( i=0; i<num_privs; i++ ) {
se_priv_add(privilege_mask, &privs[i].privilege_mask);
}
return true;
}
/***************************************************************************
combine 2 uint64_t privilege bitmaps and store the resulting set in new_mask
****************************************************************************/
void se_priv_add( uint64_t *privilege_mask, const uint64_t *addpriv )
{
*privilege_mask |= *addpriv;
}
/***************************************************************************
remove one uint64_t privileges bitmap from another and store the resulting set
in privilege_mask
****************************************************************************/
void se_priv_remove( uint64_t *privilege_mask, const uint64_t *removepriv )
{
*privilege_mask &= ~*removepriv;
}
/***************************************************************************
invert a given uint64_t and store the set in new_mask
****************************************************************************/
static void se_priv_invert( uint64_t *new_mask, const uint64_t *privilege_mask )
{
uint64_t allprivs;
se_priv_copy( &allprivs, &se_priv_all );
se_priv_remove( &allprivs, privilege_mask );
se_priv_copy( new_mask, &allprivs );
}
/***************************************************************************
check if 2 privilege bitmaps (as uint64_t) are equal
****************************************************************************/
bool se_priv_equal( const uint64_t *privilege_mask1, const uint64_t *privilege_mask2 )
{
return *privilege_mask1 == *privilege_mask2;
}
/***************************************************************************
check if a uint64_t has any assigned privileges
****************************************************************************/
static bool se_priv_empty( const uint64_t *privilege_mask )
{
uint64_t p1;
se_priv_copy( &p1, privilege_mask );
p1 &= se_priv_all;
return se_priv_equal( &p1, &se_priv_none );
}
/*********************************************************************
Lookup the uint64_t bitmask value for a privilege name
*********************************************************************/
bool se_priv_from_name( const char *name, uint64_t *privilege_mask )
{
int i;
uint32_t num_privs = ARRAY_SIZE(privs);
for ( i=0; i<num_privs; i++ ) {
if ( strequal( privs[i].name, name ) ) {
se_priv_copy( privilege_mask, &privs[i].privilege_mask );
return true;
}
}
return false;
}
/****************************************************************************
check if the privilege (by bitmask) is in the privilege list
****************************************************************************/
bool is_privilege_assigned(const uint64_t *privileges,
const uint64_t *check)
{
uint64_t 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 uint64_t we want to check for and remove that from the
original set. If we are left with the uint64_t 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 any of the privileges (by bitmask) is in the privilege list
****************************************************************************/
static bool is_any_privilege_assigned( uint64_t *privileges, const uint64_t *check )
{
uint64_t 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 uint64_t we want to check for and remove that from the
original set. If we are left with the uint64_t 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 );
}
/*********************************************************************
Generate the struct lsa_LUIDAttribute structure based on a bitmask
*********************************************************************/
const char* get_privilege_dispname( const char *name )
{
int i;
uint32_t num_privs = ARRAY_SIZE(privs);
if (!name) {
return NULL;
}
for ( i=0; i<num_privs; i++ ) {
if ( strequal( privs[i].name, name ) ) {
return privs[i].description;
}
}
return NULL;
}
/****************************************************************************
initialise a privilege list and set the talloc context
****************************************************************************/
/****************************************************************************
Does the user have the specified privilege ? We only deal with one privilege
at a time here.
*****************************************************************************/
bool user_has_privileges(const struct security_token *token, const uint64_t *privilege_bit)
{
if ( !token )
return false;
return is_privilege_assigned( &token->privilege_mask, privilege_bit );
}
/****************************************************************************
Does the user have any of the specified privileges ? We only deal with one privilege
at a time here.
*****************************************************************************/
bool user_has_any_privilege(struct security_token *token, const uint64_t *privilege_mask)
{
if ( !token )
return false;
return is_any_privilege_assigned( &token->privilege_mask, privilege_mask );
}
/*******************************************************************
return the number of elements in the 'short' privlege array (traditional source3 behaviour)
*******************************************************************/
int num_privileges_in_short_list( void )
{
return NUM_SHORT_LIST_PRIVS;
}
/****************************************************************************
add a privilege to a privilege array
****************************************************************************/
static bool privilege_set_add(PRIVILEGE_SET *priv_set, struct lsa_LUIDAttribute set)
{
struct lsa_LUIDAttribute *new_set;
/* we can allocate memory to add the new privilege */
new_set = talloc_realloc(priv_set->mem_ctx, priv_set->set, struct lsa_LUIDAttribute, 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].attribute = set.attribute;
priv_set->count++;
priv_set->set = new_set;
return true;
}
/*******************************************************************
*******************************************************************/
bool se_priv_to_privilege_set( PRIVILEGE_SET *set, uint64_t privilege_mask )
{
int i;
uint32_t num_privs = ARRAY_SIZE(privs);
struct lsa_LUIDAttribute luid;
luid.attribute = 0;
luid.luid.high = 0;
for ( i=0; i<num_privs; i++ ) {
if ((privilege_mask & privs[i].privilege_mask) == 0)
continue;
luid.luid.high = 0;
luid.luid.low = privs[i].luid;
if ( !privilege_set_add( set, luid ) )
return false;
}
return true;
}
/*******************************************************************
*******************************************************************/
bool privilege_set_to_se_priv( uint64_t *privilege_mask, struct lsa_PrivilegeSet *privset )
{
int i;
ZERO_STRUCTP( privilege_mask );
for ( i=0; i<privset->count; i++ ) {
uint64_t r;
/* sanity check for invalid privilege. we really
only care about the low 32 bits */
if ( privset->set[i].luid.high != 0 )
return false;
r = sec_privilege_mask(privset->set[i].luid.low);
if (r) {
*privilege_mask |= r;
}
}
return true;
}
/*
map a privilege id to the wire string constant
*/
const char *sec_privilege_name(enum sec_privilege privilege)
{
int i;
for (i=0;i<ARRAY_SIZE(privs);i++) {
if (privs[i].luid == privilege) {
return privs[i].name;
}
}
return NULL;
}
/*
map a privilege id to a privilege display name. Return NULL if not found
TODO: this should use language mappings
*/
const char *sec_privilege_display_name(enum sec_privilege privilege, uint16_t *language)
{
int i;
if (privilege < 1 || privilege > 64) {
return NULL;
}
for (i=0;i<ARRAY_SIZE(privs);i++) {
if (privs[i].luid == privilege) {
return privs[i].description;
}
}
return NULL;
}
/*
map a privilege name to a privilege id. Return -1 if not found
*/
enum sec_privilege sec_privilege_id(const char *name)
{
int i;
for (i=0;i<ARRAY_SIZE(privs);i++) {
if (strcasecmp(privs[i].name, name) == 0) {
return privs[i].luid;
}
}
return -1;
}
/*
map a privilege name to a privilege id. Return -1 if not found
*/
enum sec_privilege sec_privilege_from_mask(uint64_t mask)
{
int i;
for (i=0;i<ARRAY_SIZE(privs);i++) {
if (privs[i].privilege_mask == mask) {
return privs[i].luid;
}
}
return -1;
}
/*
assist in walking the table of privileges - return the LUID (low 32 bits) by index
*/
enum sec_privilege sec_privilege_from_index(int idx)
{
if (idx >= 0 && idx<ARRAY_SIZE(privs)) {
return privs[idx].luid;
}
return -1;
}
/*
assist in walking the table of privileges - return the string constant by index
*/
const char *sec_privilege_name_from_index(int idx)
{
if (idx >= 0 && idx<ARRAY_SIZE(privs)) {
return privs[idx].name;
}
return NULL;
}
/*
return a privilege mask given a privilege id
*/
static uint64_t sec_privilege_mask(enum sec_privilege privilege)
{
int i;
for (i=0;i<ARRAY_SIZE(privs);i++) {
if (privs[i].luid == privilege) {
return privs[i].privilege_mask;
}
}
return 0;
}
/*
return true if a security_token has a particular privilege bit set
*/
bool security_token_has_privilege(const struct security_token *token, enum sec_privilege privilege)
{
uint64_t mask;
mask = sec_privilege_mask(privilege);
if (mask == 0) {
return false;
}
if (token->privilege_mask & mask) {
return true;
}
return false;
}
/*
set a bit in the privilege mask
*/
void security_token_set_privilege(struct security_token *token, enum sec_privilege privilege)
{
/* Relies on the fact that an invalid privilage will return 0, so won't change this */
token->privilege_mask |= sec_privilege_mask(privilege);
}
void security_token_debug_privileges(int dbg_lev, const struct security_token *token)
{
DEBUGADD(dbg_lev, (" Privileges (0x%16llX):\n",
(unsigned long long) token->privilege_mask));
if (token->privilege_mask) {
int idx = 0;
int i = 0;
for (idx = 0; idx<ARRAY_SIZE(privs); idx++) {
if (token->privilege_mask & privs[idx].privilege_mask) {
DEBUGADD(dbg_lev, (" Privilege[%3lu]: %s\n", (unsigned long)i++,
privs[idx].name));
}
}
}
}