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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 "libcli/security/privileges_private.h"
#include "librpc/gen_ndr/security.h"
/* The use of strcasecmp here is safe, all the comparison strings are ASCII */
#undef strcasecmp
#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, SEC_PRIV_MACHINE_ACCOUNT_BIT, "SeMachineAccountPrivilege", "Add machines to domain"},
{SEC_PRIV_TAKE_OWNERSHIP, SEC_PRIV_TAKE_OWNERSHIP_BIT, "SeTakeOwnershipPrivilege", "Take ownership of files or other objects"},
{SEC_PRIV_BACKUP, SEC_PRIV_BACKUP_BIT, "SeBackupPrivilege", "Back up files and directories"},
{SEC_PRIV_RESTORE, SEC_PRIV_RESTORE_BIT, "SeRestorePrivilege", "Restore files and directories"},
{SEC_PRIV_REMOTE_SHUTDOWN, SEC_PRIV_REMOTE_SHUTDOWN_BIT, "SeRemoteShutdownPrivilege", "Force shutdown from a remote system"},
{SEC_PRIV_PRINT_OPERATOR, SEC_PRIV_PRINT_OPERATOR_BIT, "SePrintOperatorPrivilege", "Manage printers"},
{SEC_PRIV_ADD_USERS, SEC_PRIV_ADD_USERS_BIT, "SeAddUsersPrivilege", "Add users and groups to the domain"},
{SEC_PRIV_DISK_OPERATOR, SEC_PRIV_DISK_OPERATOR_BIT, "SeDiskOperatorPrivilege", "Manage disk shares"},
/* The list from here on is not displayed in the code from
* source3, and is after index NUM_SHORT_LIST_PRIVS for that
* reason */
{SEC_PRIV_SECURITY,
SEC_PRIV_SECURITY_BIT,
"SeSecurityPrivilege",
"System security"},
{SEC_PRIV_SYSTEMTIME,
SEC_PRIV_SYSTEMTIME_BIT,
"SeSystemtimePrivilege",
"Set the system clock"},
{SEC_PRIV_SHUTDOWN,
SEC_PRIV_SHUTDOWN_BIT,
"SeShutdownPrivilege",
"Shutdown the system"},
{SEC_PRIV_DEBUG,
SEC_PRIV_DEBUG_BIT,
"SeDebugPrivilege",
"Debug processes"},
{SEC_PRIV_SYSTEM_ENVIRONMENT,
SEC_PRIV_SYSTEM_ENVIRONMENT_BIT,
"SeSystemEnvironmentPrivilege",
"Modify system environment"},
{SEC_PRIV_SYSTEM_PROFILE,
SEC_PRIV_SYSTEM_PROFILE_BIT,
"SeSystemProfilePrivilege",
"Profile the system"},
{SEC_PRIV_PROFILE_SINGLE_PROCESS,
SEC_PRIV_PROFILE_SINGLE_PROCESS_BIT,
"SeProfileSingleProcessPrivilege",
"Profile one process"},
{SEC_PRIV_INCREASE_BASE_PRIORITY,
SEC_PRIV_INCREASE_BASE_PRIORITY_BIT,
"SeIncreaseBasePriorityPrivilege",
"Increase base priority"},
{SEC_PRIV_LOAD_DRIVER,
SEC_PRIV_LOAD_DRIVER_BIT,
"SeLoadDriverPrivilege",
"Load drivers"},
{SEC_PRIV_CREATE_PAGEFILE,
SEC_PRIV_CREATE_PAGEFILE_BIT,
"SeCreatePagefilePrivilege",
"Create page files"},
{SEC_PRIV_INCREASE_QUOTA,
SEC_PRIV_INCREASE_QUOTA_BIT,
"SeIncreaseQuotaPrivilege",
"Increase quota"},
{SEC_PRIV_CHANGE_NOTIFY,
SEC_PRIV_CHANGE_NOTIFY_BIT,
"SeChangeNotifyPrivilege",
"Register for change notify"},
{SEC_PRIV_UNDOCK,
SEC_PRIV_UNDOCK_BIT,
"SeUndockPrivilege",
"Undock devices"},
{SEC_PRIV_MANAGE_VOLUME,
SEC_PRIV_MANAGE_VOLUME_BIT,
"SeManageVolumePrivilege",
"Manage system volumes"},
{SEC_PRIV_IMPERSONATE,
SEC_PRIV_IMPERSONATE_BIT,
"SeImpersonatePrivilege",
"Impersonate users"},
{SEC_PRIV_CREATE_GLOBAL,
SEC_PRIV_CREATE_GLOBAL_BIT,
"SeCreateGlobalPrivilege",
"Create global"},
{SEC_PRIV_ENABLE_DELEGATION,
SEC_PRIV_ENABLE_DELEGATION_BIT,
"SeEnableDelegationPrivilege",
"Enable Delegation"},
};
/* These are rights, not privileges, and should not be confused. The
* names are very similar, and they are quite similar in behaviour,
* but they are not to be enumerated as a system-wide list or have an
* LUID value */
static const struct {
uint32_t right_mask;
const char *name;
const char *description;
} rights[] = {
{LSA_POLICY_MODE_INTERACTIVE,
"SeInteractiveLogonRight",
"Interactive logon"},
{LSA_POLICY_MODE_NETWORK,
"SeNetworkLogonRight",
"Network logon"},
{LSA_POLICY_MODE_REMOTE_INTERACTIVE,
"SeRemoteInteractiveLogonRight",
"Remote Interactive logon"}
};
/*
return a privilege mask given a privilege id
*/
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;
}
/***************************************************************************
put all valid privileges into a mask
****************************************************************************/
void se_priv_put_all_privileges(uint64_t *privilege_mask)
{
int i;
uint32_t num_privs = ARRAY_SIZE(privs);
*privilege_mask = 0;
for ( i=0; i<num_privs; i++ ) {
*privilege_mask |= privs[i].privilege_mask;
}
}
/*********************************************************************
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 ) ) {
*privilege_mask = privs[i].privilege_mask;
return true;
}
}
return false;
}
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;
}
/*******************************************************************
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;
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 SEC_PRIV_INVALID;
}
/*
map a 'right' name to it's bitmap value. Return 0 if not found
*/
uint32_t sec_right_bit(const char *name)
{
int i;
for (i=0;i<ARRAY_SIZE(rights);i++) {
if (strcasecmp(rights[i].name, name) == 0) {
return rights[i].right_mask;
}
}
return 0;
}
/*
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 SEC_PRIV_INVALID;
}
/*
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 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);
}
/*
set a bit in the rights mask
*/
void security_token_set_right_bit(struct security_token *token, uint32_t right_bit)
{
token->rights_mask |= right_bit;
}
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));
}
}
}
DEBUGADD(dbg_lev, (" Rights (0x%16lX):\n",
(unsigned long) token->rights_mask));
if (token->rights_mask) {
int idx = 0;
int i = 0;
for (idx = 0; idx<ARRAY_SIZE(rights); idx++) {
if (token->rights_mask & rights[idx].right_mask) {
DEBUGADD(dbg_lev, (" Right[%3lu]: %s\n", (unsigned long)i++,
rights[idx].name));
}
}
}
}