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/*
Unix SMB/CIFS implementation.
Privileges handling functions
Copyright (C) Jean François Micouleau 1998-2001
Copyright (C) Simo Sorce 2002-2003
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"
/* defines */
#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)
#define NTSTATUS_CHECK(err, label, str1, str2) do { if (!NT_STATUS_IS_OK(err)) { DEBUG(0, ("%s: %s failed!\n", str1, str2)); } } while(0)
PRIVS privs[] = {
{SE_NONE, "no_privs", "No privilege"}, /* this one MUST be first */
{SE_CREATE_TOKEN, "SeCreateTokenPrivilege", "Create Token"},
{SE_ASSIGN_PRIMARY_TOKEN, "SeAssignPrimaryTokenPrivilege", "Assign Primary Token"},
{SE_LOCK_MEMORY, "SeLockMemoryPrivilege", "Lock Memory"},
{SE_INCREASE_QUOTA, "SeIncreaseQuotaPrivilege", "Increase Quota"},
{SE_UNSOLICITED_INPUT, "eUnsolicitedInputPrivilege", "Unsolicited Input"},
{SE_MACHINE_ACCOUNT, "SeMachineAccountPrivilege", "Can add Machine Accounts to the Domain"},
{SE_TCB, "SeTcbPrivilege", "TCB"},
{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"}
};
/****************************************************************************
Check if a user is a mapped group.
This function will check if the group SID is mapped onto a
system managed gid or onto a winbind manged sid.
In the first case it will be threated like a mapped group
and the backend should take the member list with a getgrgid
and ignore any user that have been possibly set into the group
object.
In the second case, the group is a fully SAM managed group
served back to the system through winbind. In this case the
members of a Local group are "unrolled" to cope with the fact
that unix cannot contain groups inside groups.
The backend MUST never call any getgr* / getpw* function or
loops with winbind may happen.
****************************************************************************/
#if 0
NTSTATUS is_mapped_group(BOOL *mapped, const DOM_SID *sid)
{
NTSTATUS result;
gid_t id;
/* look if mapping exist, do not make idmap alloc an uid if SID is not found */
result = idmap_get_gid_from_sid(&id, sid, False);
if (NT_STATUS_IS_OK(result)) {
*mapped = gid_is_in_winbind_range(id);
} else {
*mapped = False;
}
return result;
}
#endif
/****************************************************************************
duplicate alloc luid_attr
****************************************************************************/
NTSTATUS dupalloc_luid_attr(TALLOC_CTX *mem_ctx, LUID_ATTR **new_la, LUID_ATTR *old_la)
{
NTSTATUS ret;
/* 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 = (LUID_ATTR *)talloc(mem_ctx, sizeof(LUID_ATTR));
ALLOC_CHECK(new_la, ret, done, "dupalloc_luid_attr");
(*new_la)->luid.high = old_la->luid.high;
(*new_la)->luid.low = old_la->luid.low;
(*new_la)->attr = old_la->attr;
ret = NT_STATUS_OK;
done:
return ret;
}
/****************************************************************************
initialise a privilege list
****************************************************************************/
NTSTATUS init_privilege(PRIVILEGE_SET **priv_set)
{
NTSTATUS ret;
TALLOC_CTX *mem_ctx = talloc_init("privilege set");
ALLOC_CHECK(mem_ctx, ret, done, "init_privilege");
*priv_set = talloc_zero(mem_ctx, sizeof(PRIVILEGE_SET));
ALLOC_CHECK(*priv_set, ret, done, "init_privilege");
(*priv_set)->mem_ctx = mem_ctx;
ret = NT_STATUS_OK;
done:
return ret;
}
NTSTATUS init_priv_with_ctx(TALLOC_CTX *mem_ctx, PRIVILEGE_SET **priv_set)
{
NTSTATUS ret;
*priv_set = talloc_zero(mem_ctx, sizeof(PRIVILEGE_SET));
ALLOC_CHECK(*priv_set, ret, done, "init_privilege");
(*priv_set)->mem_ctx = mem_ctx;
(*priv_set)->ext_ctx = True;
ret = NT_STATUS_OK;
done:
return ret;
}
void reset_privilege(PRIVILEGE_SET *priv_set)
{
priv_set->count = 0;
priv_set->control = 0;
priv_set->set = NULL;
}
void destroy_privilege(PRIVILEGE_SET **priv_set)
{
reset_privilege(*priv_set);
if (!((*priv_set)->ext_ctx))
/* mem_ctx is local, destroy it */
talloc_destroy((*priv_set)->mem_ctx);
*priv_set = NULL;
}
/****************************************************************************
add a privilege to a privilege array
****************************************************************************/
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 (NT_STATUS_IS_OK(check_priv_in_privilege(priv_set, set)))
return NT_STATUS_UNSUCCESSFUL;
/* we can allocate memory to add the new privilege */
new_set = (LUID_ATTR *)talloc_realloc(priv_set->mem_ctx, priv_set->set, (priv_set->count + 1) * (sizeof(LUID_ATTR)));
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;
}
NTSTATUS add_privilege_by_name(PRIVILEGE_SET *priv_set, const char *name)
{
int e;
for (e = 0; privs[e].se_priv != SE_ALL_PRIVS; e++) {
if (StrCaseCmp(privs[e].priv, name) == 0) {
LUID_ATTR la;
la.attr = 0;
la.luid.high = 0;
la.luid.low = privs[e].se_priv;
return add_privilege(priv_set, la);
}
}
DEBUG(1, ("add_privilege_by_name: No Such Privilege Found (%s)\n", name));
return NT_STATUS_UNSUCCESSFUL;
}
/****************************************************************************
add all the privileges to a privilege array
****************************************************************************/
NTSTATUS add_all_privilege(PRIVILEGE_SET *priv_set)
{
NTSTATUS result = NT_STATUS_OK;
LUID_ATTR set;
set.attr = 0;
set.luid.high = 0;
/* TODO: set a proper list of privileges */
set.luid.low = SE_ADD_USERS;
result = add_privilege(priv_set, set);
NTSTATUS_CHECK(result, done, "add_all_privilege", "add_privilege");
set.luid.low = SE_MACHINE_ACCOUNT;
result = add_privilege(priv_set, set);
NTSTATUS_CHECK(result, done, "add_all_privilege", "add_privilege");
set.luid.low = SE_PRINT_OPERATOR;
result = add_privilege(priv_set, set);
NTSTATUS_CHECK(result, done, "add_all_privilege", "add_privilege");
return result;
}
/****************************************************************************
check if the privilege list is empty
****************************************************************************/
NTSTATUS check_empty_privilege(PRIVILEGE_SET *priv_set)
{
if (!priv_set)
return NT_STATUS_INVALID_PARAMETER;
if (priv_set->count == 0)
return NT_STATUS_OK;
return NT_STATUS_UNSUCCESSFUL;
}
/****************************************************************************
check if the privilege is in the privilege list
****************************************************************************/
NTSTATUS check_priv_in_privilege(PRIVILEGE_SET *priv_set, LUID_ATTR set)
{
int i;
if (!priv_set)
return NT_STATUS_INVALID_PARAMETER;
/* if the list is empty, obviously we can't have it */
if (NT_STATUS_IS_OK(check_empty_privilege(priv_set)))
return NT_STATUS_UNSUCCESSFUL;
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 NT_STATUS_OK;
}
}
return NT_STATUS_UNSUCCESSFUL;
}
/****************************************************************************
remove a privilege from a privilege array
****************************************************************************/
NTSTATUS remove_privilege(PRIVILEGE_SET *priv_set, LUID_ATTR set)
{
NTSTATUS ret;
LUID_ATTR *new_set;
LUID_ATTR *old_set;
int i,j;
if (!priv_set)
return NT_STATUS_INVALID_PARAMETER;
/* check if the privilege is in the list */
if (!NT_STATUS_IS_OK(check_priv_in_privilege(priv_set, set)))
return NT_STATUS_UNSUCCESSFUL;
/* special case if it's the only privilege in the list */
if (priv_set->count == 1) {
reset_privilege(priv_set);
return NT_STATUS_OK;
}
/*
* the privilege is there, create a new list,
* and copy the other privileges
*/
old_set = priv_set->set;
new_set = (LUID_ATTR *)talloc(priv_set->mem_ctx, (priv_set->count - 1) * (sizeof(LUID_ATTR)));
ALLOC_CHECK(new_set, ret, done, "remove_privilege");
for (i=0, j=0; i < priv_set->count; i++) {
if ( (old_set[i].luid.low == set.luid.low) &&
(old_set[i].luid.high == set.luid.high) ) {
continue;
}
new_set[j].luid.low = old_set[i].luid.low;
new_set[j].luid.high = old_set[i].luid.high;
new_set[j].attr = old_set[i].attr;
j++;
}
if (j != priv_set->count - 1) {
DEBUG(0,("remove_privilege: mismatch ! difference is not -1\n"));
DEBUGADD(0,("old count:%d, new count:%d\n", priv_set->count, j));
return NT_STATUS_INTERNAL_ERROR;
}
/* ok everything is fine */
priv_set->count--;
priv_set->set = new_set;
ret = NT_STATUS_OK;
done:
return ret;
}
/****************************************************************************
duplicates a privilege array
the new privilege set must be passed inited
(use init_privilege or init_priv_with_ctx)
****************************************************************************/
NTSTATUS dup_priv_set(PRIVILEGE_SET *new_priv_set, PRIVILEGE_SET *priv_set)
{
NTSTATUS ret;
LUID_ATTR *new_set;
LUID_ATTR *old_set;
int i;
if (!new_priv_set || !priv_set)
return NT_STATUS_INVALID_PARAMETER;
/* special case if there are no privileges in the list */
if (priv_set->count == 0) {
return NT_STATUS_OK;
}
/*
* create a new list,
* and copy the other privileges
*/
old_set = priv_set->set;
new_set = (LUID_ATTR *)talloc(new_priv_set->mem_ctx, (priv_set->count) * (sizeof(LUID_ATTR)));
ALLOC_CHECK(new_set, ret, done, "dup_priv_set");
for (i=0; i < priv_set->count; i++) {
new_set[i].luid.low = old_set[i].luid.low;
new_set[i].luid.high = old_set[i].luid.high;
new_set[i].attr = old_set[i].attr;
}
new_priv_set->count = priv_set->count;
new_priv_set->control = priv_set->control;
new_priv_set->set = new_set;
ret = NT_STATUS_OK;
done:
return ret;
}
NTSTATUS user_has_privilege(struct current_user *user, uint32 privilege)
{
LUID_ATTR set;
set.attr = 0;
set.luid.high = 0;
set.luid.low = privilege;
return check_priv_in_privilege(user->privs, set);
}
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