r23485: This checkin consists mostly of refactorings in preparation of the

activation of global registry options in loadparm.c, mainly to
extract functionality from net_conf.c to be made availabel elsewhere
and to minimize linker dependencies.

In detail:

* move functions registry_push/pull_value from lib/util_reg.c to new file
  lib/util_reg_api.c

* create a fake user token consisting of builtin administrators sid and
  se_disk_operators privilege by hand instead of using get_root_nt_token()
  to minimize linker deps for bin/net.

  + new function registry_create_admin_token() in new lib/util_reg_smbconf.c
  + move dup_nt_token from auth/token_util.c to new file lib/util_nttoken.c
  + adapt net_conf.c and Makefile.in accordingly.

* split lib/profiles.c into two parts: new file lib/profiles_basic.c
  takes all the low level mask manipulation and format conversion functions
  (se_priv, privset, luid). the privs array is completely hidden from
  profiles.c by adding some access-functions. some mask-functions are not
  static anymore.

  Generally, SID- and LUID-related stuff that has more dependencies
  is kept in lib/profiles.c

* Move initialization of regdb from net_conf.c into a function
  registry_init_regdb() in lib/util_reg_smbconf.c.

Michael
(This used to be commit efd3e2bfb756ac5c4df7984791c67e7ae20a582e)

1 files changed, 519 insertions, 0 deletions

diff --git a/source3/lib/privileges_basic.c b/source3/lib/privileges_basic.c
new file mode 100644
index 0000000000..b1ca1765d5
--- /dev/null
+++ b/source3/lib/privileges_basic.c
@@ -0,0 +1,519 @@
+/*
+   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
+   
+   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.
+*/
+
+/*
+ * 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"
+
+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 }}
+};
+
+/***************************************************************************
+ 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;
+}
+
+/***************************************************************************
+ put all privileges into a mask
+****************************************************************************/
+
+BOOL se_priv_put_all_privileges(SE_PRIV *mask)
+{
+	int i;
+	uint32 num_privs = count_all_privileges();
+
+	if (!se_priv_copy(mask, &se_priv_none)) {
+		return False;
+	}
+	for ( i=0; i<num_privs; i++ ) {
+		se_priv_add(mask, &privs[i].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
+****************************************************************************/
+
+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"));
+}
+
+/****************************************************************************
+ check if the privilege is in the privilege list
+****************************************************************************/
+
+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 );
+}
+
+/*********************************************************************
+ 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;
+}
+
+/****************************************************************************
+ 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 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 );
+}
+
+/*******************************************************************
+ 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;
+}
+
+
+/*********************************************************************
+ 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;
+}
+
+/****************************************************************************
+ 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;
+}
+
+
+/****************************************************************************
+ 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;
+}
+
+/*******************************************************************
+*******************************************************************/
+
+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;
+}
+