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/*
* Unix SMB/CIFS implementation.
* Virtual Windows Registry Layer
* Copyright (C) Gerald Carter 2002-2005
*
* 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.
*/
/* Implementation of internal registry database functions. */
#include "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_SRV
static TDB_CONTEXT *tdb_reg;
#define VALUE_PREFIX "SAMBA_REGVAL"
static BOOL regdb_store_reg_keys( const char *keyname, REGSUBKEY_CTR *subkeys );
static BOOL regdb_store_reg_values( const char *keyname, REGVAL_CTR *values);
static int regdb_fetch_reg_keys( const char* key, REGSUBKEY_CTR *subkeys );
static int regdb_fetch_reg_values( const char* key, REGVAL_CTR *values );
/* List the deepest path into the registry. All part components will be created.*/
/* If you want to have a part of the path controlled by the tdb abd part by
a virtual registry db (e.g. printing), then you have to list the deepest path.
For example,"HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion/Print"
allows the reg_db backend to handle everything up to
"HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion" and then we'll hook
the reg_printing backend onto the last component of the path (see
KEY_PRINTING_2K in include/rpc_reg.h) --jerry */
static const char *builtin_registry_paths[] = {
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print",
"HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Ports",
"HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print",
"HKLM\\SYSTEM\\CurrentControlSet\\Control\\ProductOptions",
"HKLM\\SYSTEM\\CurrentControlSet\\Services\\LanmanServer\\Shares",
"HKLM\\SYSTEM\\CurrentControlSet\\Services\\EventLog",
"HKLM\\SYSTEM\\CurrentControlSet\\Services\\TcpIp\\Parameters",
"HKLM\\SYSTEM\\CurrentControlSet\\Services\\Netlogon\\Parameters",
"HKU",
"HKCR",
NULL };
struct builtin_regkey_value {
const char *path;
const char *valuename;
uint32 type;
union {
const char *string;
uint32 dw_value;
} data;
};
static struct builtin_regkey_value builtin_registry_values[] = {
{ "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion", "SystemRoot", REG_SZ, { "c:\\Windows" } },
{ NULL, NULL, 0, { NULL } }
};
#define REGVER_V1 1 /* first db version with write support */
/***********************************************************************
Open the registry data in the tdb
***********************************************************************/
static BOOL init_registry_data( void )
{
pstring path, base, remaining;
fstring keyname, subkeyname;
REGSUBKEY_CTR subkeys;
REGVAL_CTR values;
int i;
const char *p, *p2;
UNISTR2 data;
/* loop over all of the predefined paths and add each component */
for ( i=0; builtin_registry_paths[i] != NULL; i++ ) {
DEBUG(6,("init_registry_data: Adding [%s]\n", builtin_registry_paths[i]));
pstrcpy( path, builtin_registry_paths[i] );
pstrcpy( base, "" );
p = path;
while ( next_token(&p, keyname, "\\", sizeof(keyname)) ) {
/* build up the registry path from the components */
if ( *base )
pstrcat( base, "\\" );
pstrcat( base, keyname );
/* get the immediate subkeyname (if we have one ) */
*subkeyname = '\0';
if ( *p ) {
pstrcpy( remaining, p );
p2 = remaining;
if ( !next_token(&p2, subkeyname, "\\", sizeof(subkeyname)) )
fstrcpy( subkeyname, p2 );
}
DEBUG(10,("init_registry_data: Storing key [%s] with subkey [%s]\n",
base, *subkeyname ? subkeyname : "NULL"));
/* we don't really care if the lookup succeeds or not since
we are about to update the record. We just want any
subkeys already present */
regsubkey_ctr_init( &subkeys );
regdb_fetch_reg_keys( base, &subkeys );
if ( *subkeyname )
regsubkey_ctr_addkey( &subkeys, subkeyname );
if ( !regdb_store_reg_keys( base, &subkeys ))
return False;
regsubkey_ctr_destroy( &subkeys );
}
}
/* loop over all of the predefined values and add each component */
for ( i=0; builtin_registry_values[i].path != NULL; i++ ) {
regval_ctr_init( &values );
regdb_fetch_reg_values( builtin_registry_values[i].path, &values );
switch( builtin_registry_values[i].type ) {
case REG_DWORD:
regval_ctr_addvalue( &values,
builtin_registry_values[i].valuename,
REG_DWORD,
(char*)&builtin_registry_values[i].data.dw_value,
sizeof(uint32) );
break;
case REG_SZ:
init_unistr2( &data, builtin_registry_values[i].data.string, UNI_STR_TERMINATE);
regval_ctr_addvalue( &values,
builtin_registry_values[i].valuename,
REG_SZ,
(char*)data.buffer,
data.uni_str_len*sizeof(uint16) );
break;
default:
DEBUG(0,("init_registry_data: invalid value type in builtin_registry_values [%d]\n",
builtin_registry_values[i].type));
}
regdb_store_reg_values( builtin_registry_values[i].path, &values );
regval_ctr_destroy( &values );
}
return True;
}
/***********************************************************************
Open the registry database
***********************************************************************/
BOOL init_registry_db( void )
{
const char *vstring = "INFO/version";
uint32 vers_id;
if ( tdb_reg )
return True;
/* placeholder tdb; reinit upon startup */
if ( !(tdb_reg = tdb_open_log(lock_path("registry.tdb"), 0, TDB_DEFAULT, O_RDWR, 0600)) )
{
tdb_reg = tdb_open_log(lock_path("registry.tdb"), 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
if ( !tdb_reg ) {
DEBUG(0,("init_registry: Failed to open registry %s (%s)\n",
lock_path("registry.tdb"), strerror(errno) ));
return False;
}
DEBUG(10,("init_registry: Successfully created registry tdb\n"));
}
vers_id = tdb_fetch_int32(tdb_reg, vstring);
if ( vers_id != REGVER_V1 ) {
/* create the registry here */
if ( !init_registry_data() ) {
DEBUG(0,("init_registry: Failed to initiailize data in registry!\n"));
return False;
}
}
return True;
}
/**********************************************************************
The full path to the registry key is used as database after the
\'s are converted to /'s. Key string is also normalized to UPPER
case.
**********************************************************************/
static void normalize_reg_path( pstring keyname )
{
pstring_sub( keyname, "\\", "/" );
strupper_m( keyname );
}
/***********************************************************************
Add subkey strings to the registry tdb under a defined key
fmt is the same format as tdb_pack except this function only supports
fstrings
***********************************************************************/
static BOOL regdb_store_reg_keys_internal( const char *key, REGSUBKEY_CTR *ctr )
{
TDB_DATA kbuf, dbuf;
char *buffer, *tmpbuf;
int i = 0;
uint32 len, buflen;
BOOL ret = True;
uint32 num_subkeys = regsubkey_ctr_numkeys( ctr );
pstring keyname;
if ( !key )
return False;
pstrcpy( keyname, key );
normalize_reg_path( keyname );
/* allocate some initial memory */
buffer = SMB_MALLOC(sizeof(pstring));
buflen = sizeof(pstring);
len = 0;
/* store the number of subkeys */
len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys );
/* pack all the strings */
for (i=0; i<num_subkeys; i++) {
len += tdb_pack( buffer+len, buflen-len, "f", regsubkey_ctr_specific_key(ctr, i) );
if ( len > buflen ) {
/* allocate some extra space */
if ((tmpbuf = SMB_REALLOC( buffer, len*2 )) == NULL) {
DEBUG(0,("regdb_store_reg_keys: Failed to realloc memory of size [%d]\n", len*2));
ret = False;
goto done;
}
buffer = tmpbuf;
buflen = len*2;
len = tdb_pack( buffer+len, buflen-len, "f", regsubkey_ctr_specific_key(ctr, i) );
}
}
/* finally write out the data */
kbuf.dptr = keyname;
kbuf.dsize = strlen(keyname)+1;
dbuf.dptr = buffer;
dbuf.dsize = len;
if ( tdb_store( tdb_reg, kbuf, dbuf, TDB_REPLACE ) == -1) {
ret = False;
goto done;
}
done:
SAFE_FREE( buffer );
return ret;
}
/***********************************************************************
Store the new subkey record and create any child key records that
do not currently exist
***********************************************************************/
static BOOL regdb_store_reg_keys( const char *key, REGSUBKEY_CTR *ctr )
{
int num_subkeys, i;
pstring path;
REGSUBKEY_CTR subkeys, old_subkeys;
char *oldkeyname;
/* fetch a list of the old subkeys so we can difure out if any were deleted */
regsubkey_ctr_init( &old_subkeys );
regdb_fetch_reg_keys( key, &old_subkeys );
/* store the subkey list for the parent */
if ( !regdb_store_reg_keys_internal( key, ctr ) ) {
DEBUG(0,("regdb_store_reg_keys: Failed to store new subkey list for parent [%s}\n", key ));
return False;
}
/* now delete removed keys */
num_subkeys = regsubkey_ctr_numkeys( &old_subkeys );
for ( i=0; i<num_subkeys; i++ ) {
oldkeyname = regsubkey_ctr_specific_key( &old_subkeys, i );
if ( !regsubkey_ctr_key_exists( ctr, oldkeyname ) ) {
pstr_sprintf( path, "%s%c%s", key, '/', oldkeyname );
normalize_reg_path( path );
tdb_delete_bystring( tdb_reg, path );
}
}
/* now create records for any subkeys that don't already exist */
num_subkeys = regsubkey_ctr_numkeys( ctr );
for ( i=0; i<num_subkeys; i++ ) {
pstr_sprintf( path, "%s%c%s", key, '/', regsubkey_ctr_specific_key( ctr, i ) );
regsubkey_ctr_init( &subkeys );
if ( regdb_fetch_reg_keys( path, &subkeys ) == -1 ) {
/* create a record with 0 subkeys */
if ( !regdb_store_reg_keys_internal( path, &subkeys ) ) {
DEBUG(0,("regdb_store_reg_keys: Failed to store new record for key [%s}\n", path ));
regsubkey_ctr_destroy( &subkeys );
return False;
}
}
regsubkey_ctr_destroy( &subkeys );
}
return True;
}
/***********************************************************************
Retrieve an array of strings containing subkeys. Memory should be
released by the caller.
***********************************************************************/
static int regdb_fetch_reg_keys( const char* key, REGSUBKEY_CTR *ctr )
{
pstring path;
uint32 num_items;
TDB_DATA dbuf;
char *buf;
uint32 buflen, len;
int i;
fstring subkeyname;
DEBUG(10,("regdb_fetch_reg_keys: Enter key => [%s]\n", key ? key : "NULL"));
pstrcpy( path, key );
/* convert to key format */
pstring_sub( path, "\\", "/" );
strupper_m( path );
dbuf = tdb_fetch_bystring( tdb_reg, path );
buf = dbuf.dptr;
buflen = dbuf.dsize;
if ( !buf ) {
DEBUG(5,("regdb_fetch_reg_keys: tdb lookup failed to locate key [%s]\n", key));
return -1;
}
len = tdb_unpack( buf, buflen, "d", &num_items);
for (i=0; i<num_items; i++) {
len += tdb_unpack( buf+len, buflen-len, "f", subkeyname );
regsubkey_ctr_addkey( ctr, subkeyname );
}
SAFE_FREE( dbuf.dptr );
DEBUG(10,("regdb_fetch_reg_keys: Exit [%d] items\n", num_items));
return num_items;
}
/****************************************************************************
Unpack a list of registry values frem the TDB
***************************************************************************/
static int regdb_unpack_values(REGVAL_CTR *values, char *buf, int buflen)
{
int len = 0;
uint32 type;
pstring valuename;
int size;
uint8 *data_p;
uint32 num_values = 0;
int i;
/* loop and unpack the rest of the registry values */
len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
for ( i=0; i<num_values; i++ ) {
/* unpack the next regval */
len += tdb_unpack(buf+len, buflen-len, "fdB",
valuename,
&type,
&size,
&data_p);
/* add the new value */
regval_ctr_addvalue( values, valuename, type, (const char *)data_p, size );
SAFE_FREE(data_p); /* 'B' option to tdbpack does a malloc() */
DEBUG(8,("specific: [%s], len: %d\n", valuename, size));
}
return len;
}
/****************************************************************************
Pack all values in all printer keys
***************************************************************************/
static int regdb_pack_values(REGVAL_CTR *values, char *buf, int buflen)
{
int len = 0;
int i;
REGISTRY_VALUE *val;
int num_values = regval_ctr_numvals( values );
if ( !values )
return 0;
/* pack the number of values first */
len += tdb_pack( buf+len, buflen-len, "d", num_values );
/* loop over all values */
for ( i=0; i<num_values; i++ ) {
val = regval_ctr_specific_value( values, i );
len += tdb_pack(buf+len, buflen-len, "fdB",
regval_name(val),
regval_type(val),
regval_size(val),
regval_data_p(val) );
}
return len;
}
/***********************************************************************
Retrieve an array of strings containing subkeys. Memory should be
released by the caller.
***********************************************************************/
static int regdb_fetch_reg_values( const char* key, REGVAL_CTR *values )
{
TDB_DATA data;
pstring keystr;
int len;
DEBUG(10,("regdb_fetch_reg_values: Looking for value of key [%s] \n", key));
pstr_sprintf( keystr, "%s/%s", VALUE_PREFIX, key );
normalize_reg_path( keystr );
data = tdb_fetch_bystring( tdb_reg, keystr );
if ( !data.dptr )
return 0;
len = regdb_unpack_values( values, data.dptr, data.dsize );
SAFE_FREE( data.dptr );
return regval_ctr_numvals(values);
}
/***********************************************************************
Stub function since we do not currently support storing registry
values in the registry.tdb
***********************************************************************/
static BOOL regdb_store_reg_values( const char *key, REGVAL_CTR *values )
{
TDB_DATA data;
pstring keystr;
int len, ret;
DEBUG(10,("regdb_store_reg_values: Looking for value of key [%s] \n", key));
ZERO_STRUCT( data );
len = regdb_pack_values( values, data.dptr, data.dsize );
if ( len <= 0 ) {
DEBUG(0,("regdb_store_reg_values: unable to pack values. len <= 0\n"));
return False;
}
data.dptr = SMB_MALLOC_ARRAY( char, len );
data.dsize = len;
len = regdb_pack_values( values, data.dptr, data.dsize );
SMB_ASSERT( len == data.dsize );
pstr_sprintf( keystr, "%s/%s", VALUE_PREFIX, key );
normalize_reg_path( keystr );
ret = tdb_store_bystring(tdb_reg, keystr, data, TDB_REPLACE);
SAFE_FREE( data.dptr );
return ret != -1 ;
}
/*
* Table of function pointers for default access
*/
REGISTRY_OPS regdb_ops = {
regdb_fetch_reg_keys,
regdb_fetch_reg_values,
regdb_store_reg_keys,
regdb_store_reg_values,
NULL
};
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