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|
/*
* Unix SMB/CIFS implementation.
* Virtual Windows Registry Layer
* Copyright (C) Gerald Carter 2002-2005
* Copyright (C) Michael Adam 2007-2009
*
* 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/>.
*/
/* Implementation of internal registry database functions. */
#include "includes.h"
#include "system/filesys.h"
#include "registry.h"
#include "reg_db.h"
#include "reg_util_internal.h"
#include "reg_backend_db.h"
#include "reg_objects.h"
#include "nt_printing.h"
#include "util_tdb.h"
#include "dbwrap.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_REGISTRY
static struct db_context *regdb = NULL;
static int regdb_refcount;
static bool regdb_key_exists(struct db_context *db, const char *key);
static bool regdb_key_is_base_key(const char *key);
static WERROR regdb_fetch_keys_internal(struct db_context *db, const char *key,
struct regsubkey_ctr *ctr);
static bool regdb_store_keys_internal(struct db_context *db, const char *key,
struct regsubkey_ctr *ctr);
static int regdb_fetch_values_internal(struct db_context *db, const char* key,
struct regval_ctr *values);
static bool regdb_store_values_internal(struct db_context *db, const char *key,
struct regval_ctr *values);
static NTSTATUS create_sorted_subkeys(const char *key);
/* 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 and 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[] = {
KEY_PRINTING_2K,
KEY_PRINTING_PORTS,
KEY_PRINTING,
KEY_PRINTING "\\Forms",
KEY_PRINTING "\\Printers",
KEY_PRINTING "\\Environments\\Windows NT x86\\Print Processors\\winprint",
KEY_SHARES,
KEY_EVENTLOG,
KEY_SMBCONF,
KEY_PERFLIB,
KEY_PERFLIB_009,
KEY_GROUP_POLICY,
KEY_SAMBA_GROUP_POLICY,
KEY_GP_MACHINE_POLICY,
KEY_GP_MACHINE_WIN_POLICY,
KEY_HKCU,
KEY_GP_USER_POLICY,
KEY_GP_USER_WIN_POLICY,
"HKLM\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\GPExtensions",
"HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print\\Monitors",
KEY_PROD_OPTIONS,
"HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\DefaultUserConfiguration",
KEY_TCPIP_PARAMS,
KEY_NETLOGON_PARAMS,
KEY_HKU,
KEY_HKCR,
KEY_HKPD,
KEY_HKPT,
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[] = {
{ KEY_PRINTING_PORTS,
SAMBA_PRINTER_PORT_NAME, REG_SZ, { "" } },
{ KEY_PRINTING_2K,
"DefaultSpoolDirectory", REG_SZ, { "C:\\Windows\\System32\\Spool\\Printers" } },
{ KEY_EVENTLOG,
"DisplayName", REG_SZ, { "Event Log" } },
{ KEY_EVENTLOG,
"ErrorControl", REG_DWORD, { (char*)0x00000001 } },
{ NULL, NULL, 0, { NULL } }
};
/**
* Initialize a key in the registry:
* create each component key of the specified path.
*/
static WERROR init_registry_key_internal(struct db_context *db,
const char *add_path)
{
WERROR werr;
TALLOC_CTX *frame = talloc_stackframe();
char *path = NULL;
char *base = NULL;
char *remaining = NULL;
char *keyname;
char *subkeyname;
struct regsubkey_ctr *subkeys;
const char *p, *p2;
DEBUG(6, ("init_registry_key: Adding [%s]\n", add_path));
path = talloc_strdup(frame, add_path);
base = talloc_strdup(frame, "");
if (!path || !base) {
werr = WERR_NOMEM;
goto fail;
}
p = path;
while (next_token_talloc(frame, &p, &keyname, "\\")) {
/* build up the registry path from the components */
if (*base) {
base = talloc_asprintf(frame, "%s\\", base);
if (!base) {
werr = WERR_NOMEM;
goto fail;
}
}
base = talloc_asprintf_append(base, "%s", keyname);
if (!base) {
werr = WERR_NOMEM;
goto fail;
}
/* get the immediate subkeyname (if we have one ) */
subkeyname = talloc_strdup(frame, "");
if (!subkeyname) {
werr = WERR_NOMEM;
goto fail;
}
if (*p) {
remaining = talloc_strdup(frame, p);
if (!remaining) {
werr = WERR_NOMEM;
goto fail;
}
p2 = remaining;
if (!next_token_talloc(frame, &p2,
&subkeyname, "\\"))
{
subkeyname = talloc_strdup(frame,p2);
if (!subkeyname) {
werr = WERR_NOMEM;
goto fail;
}
}
}
DEBUG(10,("init_registry_key: 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 */
werr = regsubkey_ctr_init(frame, &subkeys);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("talloc() failure!\n"));
goto fail;
}
werr = regdb_fetch_keys_internal(db, base, subkeys);
if (!W_ERROR_IS_OK(werr) &&
!W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
{
goto fail;
}
if (*subkeyname) {
werr = regsubkey_ctr_addkey(subkeys, subkeyname);
if (!W_ERROR_IS_OK(werr)) {
goto fail;
}
}
if (!regdb_store_keys_internal(db, base, subkeys)) {
werr = WERR_CAN_NOT_COMPLETE;
goto fail;
}
}
werr = WERR_OK;
fail:
TALLOC_FREE(frame);
return werr;
}
struct init_registry_key_context {
const char *add_path;
};
static NTSTATUS init_registry_key_action(struct db_context *db,
void *private_data)
{
struct init_registry_key_context *init_ctx =
(struct init_registry_key_context *)private_data;
return werror_to_ntstatus(init_registry_key_internal(
db, init_ctx->add_path));
}
/**
* Initialize a key in the registry:
* create each component key of the specified path,
* wrapped in one db transaction.
*/
WERROR init_registry_key(const char *add_path)
{
struct init_registry_key_context init_ctx;
if (regdb_key_exists(regdb, add_path)) {
return WERR_OK;
}
init_ctx.add_path = add_path;
return ntstatus_to_werror(dbwrap_trans_do(regdb,
init_registry_key_action,
&init_ctx));
}
/***********************************************************************
Open the registry data in the tdb
***********************************************************************/
static void regdb_ctr_add_value(struct regval_ctr *ctr,
struct builtin_regkey_value *value)
{
switch(value->type) {
case REG_DWORD:
regval_ctr_addvalue(ctr, value->valuename, REG_DWORD,
(uint8_t *)&value->data.dw_value,
sizeof(uint32));
break;
case REG_SZ:
regval_ctr_addvalue_sz(ctr, value->valuename,
value->data.string);
break;
default:
DEBUG(0, ("regdb_ctr_add_value: invalid value type in "
"registry values [%d]\n", value->type));
}
}
static NTSTATUS init_registry_data_action(struct db_context *db,
void *private_data)
{
NTSTATUS status;
TALLOC_CTX *frame = talloc_stackframe();
struct regval_ctr *values;
int i;
/* loop over all of the predefined paths and add each component */
for (i=0; builtin_registry_paths[i] != NULL; i++) {
if (regdb_key_exists(db, builtin_registry_paths[i])) {
continue;
}
status = werror_to_ntstatus(init_registry_key_internal(db,
builtin_registry_paths[i]));
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
}
/* loop over all of the predefined values and add each component */
for (i=0; builtin_registry_values[i].path != NULL; i++) {
WERROR werr;
werr = regval_ctr_init(frame, &values);
if (!W_ERROR_IS_OK(werr)) {
status = werror_to_ntstatus(werr);
goto done;
}
regdb_fetch_values_internal(db,
builtin_registry_values[i].path,
values);
/* preserve existing values across restarts. Only add new ones */
if (!regval_ctr_key_exists(values,
builtin_registry_values[i].valuename))
{
regdb_ctr_add_value(values,
&builtin_registry_values[i]);
regdb_store_values_internal(db,
builtin_registry_values[i].path,
values);
}
TALLOC_FREE(values);
}
status = NT_STATUS_OK;
done:
TALLOC_FREE(frame);
return status;
}
WERROR init_registry_data(void)
{
WERROR werr;
TALLOC_CTX *frame = talloc_stackframe();
struct regval_ctr *values;
int i;
/*
* First, check for the existence of the needed keys and values.
* If all do already exist, we can save the writes.
*/
for (i=0; builtin_registry_paths[i] != NULL; i++) {
if (!regdb_key_exists(regdb, builtin_registry_paths[i])) {
goto do_init;
}
}
for (i=0; builtin_registry_values[i].path != NULL; i++) {
werr = regval_ctr_init(frame, &values);
W_ERROR_NOT_OK_GOTO_DONE(werr);
regdb_fetch_values_internal(regdb,
builtin_registry_values[i].path,
values);
if (!regval_ctr_key_exists(values,
builtin_registry_values[i].valuename))
{
TALLOC_FREE(values);
goto do_init;
}
TALLOC_FREE(values);
}
werr = WERR_OK;
goto done;
do_init:
/*
* There are potentially quite a few store operations which are all
* indiviually wrapped in tdb transactions. Wrapping them in a single
* transaction gives just a single transaction_commit() to actually do
* its fsync()s. See tdb/common/transaction.c for info about nested
* transaction behaviour.
*/
werr = ntstatus_to_werror(dbwrap_trans_do(regdb,
init_registry_data_action,
NULL));
done:
TALLOC_FREE(frame);
return werr;
}
static int regdb_normalize_keynames_fn(struct db_record *rec,
void *private_data)
{
TALLOC_CTX *mem_ctx = talloc_tos();
const char *keyname;
NTSTATUS status;
if (rec->key.dptr == NULL || rec->key.dsize == 0) {
return 0;
}
keyname = strchr((const char *) rec->key.dptr, '/');
if (keyname) {
struct db_record new_rec;
keyname = talloc_string_sub(mem_ctx,
(const char *) rec->key.dptr,
"/",
"\\");
DEBUG(2, ("regdb_normalize_keynames_fn: Convert %s to %s\n",
(const char *) rec->key.dptr,
keyname));
new_rec.value = rec->value;
new_rec.key = string_term_tdb_data(keyname);
new_rec.private_data = rec->private_data;
/* Delete the original record and store the normalized key */
status = rec->delete_rec(rec);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("regdb_normalize_keynames_fn: "
"tdb_delete for [%s] failed!\n",
rec->key.dptr));
return 1;
}
status = rec->store(&new_rec, new_rec.value, TDB_REPLACE);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("regdb_normalize_keynames_fn: "
"failed to store new record for [%s]!\n",
keyname));
return 1;
}
}
return 0;
}
static WERROR regdb_store_regdb_version(uint32_t version)
{
NTSTATUS status;
const char *version_keyname = "INFO/version";
if (!regdb) {
return WERR_CAN_NOT_COMPLETE;
}
status = dbwrap_trans_store_int32(regdb, version_keyname, version);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("regdb_store_regdb_version: error storing %s = %d: %s\n",
version_keyname, version, nt_errstr(status)));
return ntstatus_to_werror(status);
} else {
DEBUG(10, ("regdb_store_regdb_version: stored %s = %d\n",
version_keyname, version));
return WERR_OK;
}
}
static WERROR regdb_upgrade_v1_to_v2(void)
{
TALLOC_CTX *mem_ctx;
int rc;
WERROR werr;
mem_ctx = talloc_stackframe();
if (mem_ctx == NULL) {
return WERR_NOMEM;
}
rc = regdb->traverse(regdb, regdb_normalize_keynames_fn, mem_ctx);
talloc_destroy(mem_ctx);
if (rc == -1) {
return WERR_REG_IO_FAILURE;
}
werr = regdb_store_regdb_version(REGVER_V2);
return werr;
}
/***********************************************************************
Open the registry database
***********************************************************************/
WERROR regdb_init(void)
{
const char *vstring = "INFO/version";
uint32 vers_id, expected_version;
WERROR werr;
if (regdb) {
DEBUG(10, ("regdb_init: incrementing refcount (%d->%d)\n",
regdb_refcount, regdb_refcount+1));
regdb_refcount++;
return WERR_OK;
}
regdb = db_open(NULL, state_path("registry.tdb"), 0,
REG_TDB_FLAGS, O_RDWR, 0600);
if (!regdb) {
regdb = db_open(NULL, state_path("registry.tdb"), 0,
REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600);
if (!regdb) {
werr = ntstatus_to_werror(map_nt_error_from_unix(errno));
DEBUG(1,("regdb_init: Failed to open registry %s (%s)\n",
state_path("registry.tdb"), strerror(errno) ));
return werr;
}
DEBUG(10,("regdb_init: Successfully created registry tdb\n"));
}
regdb_refcount = 1;
DEBUG(10, ("regdb_init: registry db openend. refcount reset (%d)\n",
regdb_refcount));
expected_version = REGVER_V2;
vers_id = dbwrap_fetch_int32(regdb, vstring);
if (vers_id == -1) {
DEBUG(10, ("regdb_init: registry version uninitialized "
"(got %d), initializing to version %d\n",
vers_id, expected_version));
werr = regdb_store_regdb_version(expected_version);
return werr;
}
if (vers_id > expected_version || vers_id == 0) {
DEBUG(1, ("regdb_init: unknown registry version %d "
"(code version = %d), refusing initialization\n",
vers_id, expected_version));
return WERR_CAN_NOT_COMPLETE;
}
if (vers_id == REGVER_V1) {
DEBUG(10, ("regdb_init: got registry db version %d, upgrading "
"to version %d\n", REGVER_V1, REGVER_V2));
if (regdb->transaction_start(regdb) != 0) {
return WERR_REG_IO_FAILURE;
}
werr = regdb_upgrade_v1_to_v2();
if (!W_ERROR_IS_OK(werr)) {
regdb->transaction_cancel(regdb);
return werr;
}
if (regdb->transaction_commit(regdb) != 0) {
return WERR_REG_IO_FAILURE;
}
vers_id = REGVER_V2;
}
/* future upgrade code should go here */
return WERR_OK;
}
/***********************************************************************
Open the registry. Must already have been initialized by regdb_init()
***********************************************************************/
WERROR regdb_open( void )
{
WERROR result = WERR_OK;
if ( regdb ) {
DEBUG(10, ("regdb_open: incrementing refcount (%d->%d)\n",
regdb_refcount, regdb_refcount+1));
regdb_refcount++;
return WERR_OK;
}
become_root();
regdb = db_open(NULL, state_path("registry.tdb"), 0,
REG_TDB_FLAGS, O_RDWR, 0600);
if ( !regdb ) {
result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
DEBUG(0,("regdb_open: Failed to open %s! (%s)\n",
state_path("registry.tdb"), strerror(errno) ));
}
unbecome_root();
regdb_refcount = 1;
DEBUG(10, ("regdb_open: registry db opened. refcount reset (%d)\n",
regdb_refcount));
return result;
}
/***********************************************************************
***********************************************************************/
int regdb_close( void )
{
if (regdb_refcount == 0) {
return 0;
}
regdb_refcount--;
DEBUG(10, ("regdb_close: decrementing refcount (%d->%d)\n",
regdb_refcount+1, regdb_refcount));
if ( regdb_refcount > 0 )
return 0;
SMB_ASSERT( regdb_refcount >= 0 );
TALLOC_FREE(regdb);
return 0;
}
WERROR regdb_transaction_start(void)
{
return (regdb->transaction_start(regdb) == 0) ?
WERR_OK : WERR_REG_IO_FAILURE;
}
WERROR regdb_transaction_commit(void)
{
return (regdb->transaction_commit(regdb) == 0) ?
WERR_OK : WERR_REG_IO_FAILURE;
}
WERROR regdb_transaction_cancel(void)
{
return (regdb->transaction_cancel(regdb) == 0) ?
WERR_OK : WERR_REG_IO_FAILURE;
}
/***********************************************************************
return the tdb sequence number of the registry tdb.
this is an indicator for the content of the registry
having changed. it will change upon regdb_init, too, though.
***********************************************************************/
int regdb_get_seqnum(void)
{
return regdb->get_seqnum(regdb);
}
static WERROR regdb_delete_key_with_prefix(struct db_context *db,
const char *keyname,
const char *prefix)
{
char *path;
WERROR werr = WERR_NOMEM;
TALLOC_CTX *mem_ctx = talloc_stackframe();
if (keyname == NULL) {
werr = WERR_INVALID_PARAM;
goto done;
}
if (prefix == NULL) {
path = discard_const_p(char, keyname);
} else {
path = talloc_asprintf(mem_ctx, "%s\\%s", prefix, keyname);
if (path == NULL) {
goto done;
}
}
path = normalize_reg_path(mem_ctx, path);
if (path == NULL) {
goto done;
}
werr = ntstatus_to_werror(dbwrap_delete_bystring(db, path));
/* treat "not" found" as ok */
if (W_ERROR_EQUAL(werr, WERR_NOT_FOUND)) {
werr = WERR_OK;
}
done:
talloc_free(mem_ctx);
return werr;
}
static WERROR regdb_delete_values(struct db_context *db, const char *keyname)
{
return regdb_delete_key_with_prefix(db, keyname, REG_VALUE_PREFIX);
}
static WERROR regdb_delete_secdesc(struct db_context *db, const char *keyname)
{
return regdb_delete_key_with_prefix(db, keyname, REG_SECDESC_PREFIX);
}
static WERROR regdb_delete_subkeylist(struct db_context *db, const char *keyname)
{
return regdb_delete_key_with_prefix(db, keyname, NULL);
}
static WERROR regdb_delete_key_lists(struct db_context *db, const char *keyname)
{
WERROR werr;
werr = regdb_delete_values(db, keyname);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(1, (__location__ " Deleting %s\\%s failed: %s\n",
REG_VALUE_PREFIX, keyname, win_errstr(werr)));
goto done;
}
werr = regdb_delete_secdesc(db, keyname);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(1, (__location__ " Deleting %s\\%s failed: %s\n",
REG_SECDESC_PREFIX, keyname, win_errstr(werr)));
goto done;
}
werr = regdb_delete_subkeylist(db, keyname);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(1, (__location__ " Deleting %s failed: %s\n",
keyname, win_errstr(werr)));
goto done;
}
done:
return werr;
}
/***********************************************************************
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 WERROR regdb_store_keys_internal2(struct db_context *db,
const char *key,
struct regsubkey_ctr *ctr)
{
TDB_DATA dbuf;
uint8 *buffer = NULL;
int i = 0;
uint32 len, buflen;
uint32 num_subkeys = regsubkey_ctr_numkeys(ctr);
char *keyname = NULL;
TALLOC_CTX *ctx = talloc_stackframe();
WERROR werr;
if (!key) {
werr = WERR_INVALID_PARAM;
goto done;
}
keyname = talloc_strdup(ctx, key);
if (!keyname) {
werr = WERR_NOMEM;
goto done;
}
keyname = normalize_reg_path(ctx, keyname);
if (!keyname) {
werr = WERR_NOMEM;
goto done;
}
/* allocate some initial memory */
buffer = (uint8 *)SMB_MALLOC(1024);
if (buffer == NULL) {
werr = WERR_NOMEM;
goto done;
}
buflen = 1024;
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++) {
size_t thistime;
thistime = tdb_pack(buffer+len, buflen-len, "f",
regsubkey_ctr_specific_key(ctr, i));
if (len+thistime > buflen) {
size_t thistime2;
/*
* tdb_pack hasn't done anything because of the short
* buffer, allocate extra space.
*/
buffer = SMB_REALLOC_ARRAY(buffer, uint8_t,
(len+thistime)*2);
if(buffer == NULL) {
DEBUG(0, ("regdb_store_keys: Failed to realloc "
"memory of size [%u]\n",
(unsigned int)(len+thistime)*2));
werr = WERR_NOMEM;
goto done;
}
buflen = (len+thistime)*2;
thistime2 = tdb_pack(
buffer+len, buflen-len, "f",
regsubkey_ctr_specific_key(ctr, i));
if (thistime2 != thistime) {
DEBUG(0, ("tdb_pack failed\n"));
werr = WERR_CAN_NOT_COMPLETE;
goto done;
}
}
len += thistime;
}
/* finally write out the data */
dbuf.dptr = buffer;
dbuf.dsize = len;
werr = ntstatus_to_werror(dbwrap_store_bystring(db, keyname, dbuf,
TDB_REPLACE));
W_ERROR_NOT_OK_GOTO_DONE(werr);
/*
* recreate the sorted subkey cache for regdb_key_exists()
*/
werr = ntstatus_to_werror(create_sorted_subkeys(keyname));
done:
TALLOC_FREE(ctx);
SAFE_FREE(buffer);
return werr;
}
/***********************************************************************
Store the new subkey record and create any child key records that
do not currently exist
***********************************************************************/
struct regdb_store_keys_context {
const char *key;
struct regsubkey_ctr *ctr;
};
static NTSTATUS regdb_store_keys_action(struct db_context *db,
void *private_data)
{
struct regdb_store_keys_context *store_ctx;
WERROR werr;
int num_subkeys, i;
char *path = NULL;
struct regsubkey_ctr *subkeys = NULL, *old_subkeys = NULL;
char *oldkeyname = NULL;
TALLOC_CTX *mem_ctx = talloc_stackframe();
store_ctx = (struct regdb_store_keys_context *)private_data;
/*
* Re-fetch the old keys inside the transaction
*/
werr = regsubkey_ctr_init(mem_ctx, &old_subkeys);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regdb_fetch_keys_internal(db, store_ctx->key, old_subkeys);
if (!W_ERROR_IS_OK(werr) &&
!W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
{
goto done;
}
/*
* Make the store operation as safe as possible without transactions:
*
* (1) For each subkey removed from ctr compared with old_subkeys:
*
* (a) First delete the value db entry.
*
* (b) Next delete the secdesc db record.
*
* (c) Then delete the subkey list entry.
*
* (2) Now write the list of subkeys of the parent key,
* deleting removed entries and adding new ones.
*
* (3) Finally create the subkey list entries for the added keys.
*
* This way if we crash half-way in between deleting the subkeys
* and storing the parent's list of subkeys, no old data can pop up
* out of the blue when re-adding keys later on.
*/
/* (1) delete removed keys' lists (values/secdesc/subkeys) */
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(store_ctx->ctr, oldkeyname)) {
/*
* It's still around, don't delete
*/
continue;
}
path = talloc_asprintf(mem_ctx, "%s\\%s", store_ctx->key,
oldkeyname);
if (!path) {
werr = WERR_NOMEM;
goto done;
}
werr = regdb_delete_key_lists(db, path);
W_ERROR_NOT_OK_GOTO_DONE(werr);
TALLOC_FREE(path);
}
TALLOC_FREE(old_subkeys);
/* (2) store the subkey list for the parent */
werr = regdb_store_keys_internal2(db, store_ctx->key, store_ctx->ctr);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
"for parent [%s]: %s\n", store_ctx->key,
win_errstr(werr)));
goto done;
}
/* (3) now create records for any subkeys that don't already exist */
num_subkeys = regsubkey_ctr_numkeys(store_ctx->ctr);
if (num_subkeys == 0) {
werr = regsubkey_ctr_init(mem_ctx, &subkeys);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regdb_store_keys_internal2(db, store_ctx->key, subkeys);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("regdb_store_keys: Failed to store "
"new record for key [%s]: %s\n",
store_ctx->key, win_errstr(werr)));
goto done;
}
TALLOC_FREE(subkeys);
}
for (i=0; i<num_subkeys; i++) {
path = talloc_asprintf(mem_ctx, "%s\\%s", store_ctx->key,
regsubkey_ctr_specific_key(store_ctx->ctr, i));
if (!path) {
werr = WERR_NOMEM;
goto done;
}
werr = regsubkey_ctr_init(mem_ctx, &subkeys);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regdb_fetch_keys_internal(db, path, subkeys);
if (!W_ERROR_IS_OK(werr)) {
/* create a record with 0 subkeys */
werr = regdb_store_keys_internal2(db, path, subkeys);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("regdb_store_keys: Failed to store "
"new record for key [%s]: %s\n", path,
win_errstr(werr)));
goto done;
}
}
TALLOC_FREE(subkeys);
TALLOC_FREE(path);
}
werr = WERR_OK;
done:
talloc_free(mem_ctx);
return werror_to_ntstatus(werr);
}
static bool regdb_store_keys_internal(struct db_context *db, const char *key,
struct regsubkey_ctr *ctr)
{
int num_subkeys, old_num_subkeys, i;
struct regsubkey_ctr *old_subkeys = NULL;
TALLOC_CTX *ctx = talloc_stackframe();
WERROR werr;
bool ret = false;
struct regdb_store_keys_context store_ctx;
if (!regdb_key_is_base_key(key) && !regdb_key_exists(db, key)) {
goto done;
}
/*
* fetch a list of the old subkeys so we can determine if anything has
* changed
*/
werr = regsubkey_ctr_init(ctx, &old_subkeys);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
goto done;
}
werr = regdb_fetch_keys_internal(db, key, old_subkeys);
if (!W_ERROR_IS_OK(werr) &&
!W_ERROR_EQUAL(werr, WERR_NOT_FOUND))
{
goto done;
}
num_subkeys = regsubkey_ctr_numkeys(ctr);
old_num_subkeys = regsubkey_ctr_numkeys(old_subkeys);
if ((num_subkeys && old_num_subkeys) &&
(num_subkeys == old_num_subkeys)) {
for (i = 0; i < num_subkeys; i++) {
if (strcmp(regsubkey_ctr_specific_key(ctr, i),
regsubkey_ctr_specific_key(old_subkeys, i))
!= 0)
{
break;
}
}
if (i == num_subkeys) {
/*
* Nothing changed, no point to even start a tdb
* transaction
*/
ret = true;
goto done;
}
}
TALLOC_FREE(old_subkeys);
store_ctx.key = key;
store_ctx.ctr = ctr;
werr = ntstatus_to_werror(dbwrap_trans_do(db,
regdb_store_keys_action,
&store_ctx));
ret = W_ERROR_IS_OK(werr);
done:
TALLOC_FREE(ctx);
return ret;
}
bool regdb_store_keys(const char *key, struct regsubkey_ctr *ctr)
{
return regdb_store_keys_internal(regdb, key, ctr);
}
/**
* create a subkey of a given key
*/
struct regdb_create_subkey_context {
const char *key;
const char *subkey;
};
static NTSTATUS regdb_create_subkey_action(struct db_context *db,
void *private_data)
{
WERROR werr;
struct regdb_create_subkey_context *create_ctx;
struct regsubkey_ctr *subkeys;
TALLOC_CTX *mem_ctx = talloc_stackframe();
create_ctx = (struct regdb_create_subkey_context *)private_data;
werr = regsubkey_ctr_init(mem_ctx, &subkeys);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regdb_fetch_keys_internal(db, create_ctx->key, subkeys);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regsubkey_ctr_addkey(subkeys, create_ctx->subkey);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regdb_store_keys_internal2(db, create_ctx->key, subkeys);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0, (__location__ " failed to store new subkey list for "
"parent key %s: %s\n", create_ctx->key,
win_errstr(werr)));
}
done:
talloc_free(mem_ctx);
return werror_to_ntstatus(werr);
}
static WERROR regdb_create_subkey(const char *key, const char *subkey)
{
WERROR werr;
struct regsubkey_ctr *subkeys;
TALLOC_CTX *mem_ctx = talloc_stackframe();
struct regdb_create_subkey_context create_ctx;
if (!regdb_key_is_base_key(key) && !regdb_key_exists(regdb, key)) {
werr = WERR_NOT_FOUND;
goto done;
}
werr = regsubkey_ctr_init(mem_ctx, &subkeys);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regdb_fetch_keys_internal(regdb, key, subkeys);
W_ERROR_NOT_OK_GOTO_DONE(werr);
if (regsubkey_ctr_key_exists(subkeys, subkey)) {
werr = WERR_OK;
goto done;
}
talloc_free(subkeys);
create_ctx.key = key;
create_ctx.subkey = subkey;
werr = ntstatus_to_werror(dbwrap_trans_do(regdb,
regdb_create_subkey_action,
&create_ctx));
done:
talloc_free(mem_ctx);
return werr;
}
/**
* create a subkey of a given key
*/
struct regdb_delete_subkey_context {
const char *key;
const char *subkey;
const char *path;
};
static NTSTATUS regdb_delete_subkey_action(struct db_context *db,
void *private_data)
{
WERROR werr;
struct regdb_delete_subkey_context *delete_ctx;
struct regsubkey_ctr *subkeys;
TALLOC_CTX *mem_ctx = talloc_stackframe();
delete_ctx = (struct regdb_delete_subkey_context *)private_data;
werr = regdb_delete_key_lists(db, delete_ctx->path);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regsubkey_ctr_init(mem_ctx, &subkeys);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regdb_fetch_keys_internal(db, delete_ctx->key, subkeys);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regsubkey_ctr_delkey(subkeys, delete_ctx->subkey);
W_ERROR_NOT_OK_GOTO_DONE(werr);
werr = regdb_store_keys_internal2(db, delete_ctx->key, subkeys);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0, (__location__ " failed to store new subkey_list for "
"parent key %s: %s\n", delete_ctx->key,
win_errstr(werr)));
}
done:
talloc_free(mem_ctx);
return werror_to_ntstatus(werr);
}
static WERROR regdb_delete_subkey(const char *key, const char *subkey)
{
WERROR werr;
char *path;
struct regdb_delete_subkey_context delete_ctx;
TALLOC_CTX *mem_ctx = talloc_stackframe();
if (!regdb_key_is_base_key(key) && !regdb_key_exists(regdb, key)) {
werr = WERR_NOT_FOUND;
goto done;
}
path = talloc_asprintf(mem_ctx, "%s\\%s", key, subkey);
if (path == NULL) {
werr = WERR_NOMEM;
goto done;
}
if (!regdb_key_exists(regdb, path)) {
werr = WERR_OK;
goto done;
}
delete_ctx.key = key;
delete_ctx.subkey = subkey;
delete_ctx.path = path;
werr = ntstatus_to_werror(dbwrap_trans_do(regdb,
regdb_delete_subkey_action,
&delete_ctx));
done:
talloc_free(mem_ctx);
return werr;
}
static TDB_DATA regdb_fetch_key_internal(struct db_context *db,
TALLOC_CTX *mem_ctx, const char *key)
{
char *path = NULL;
TDB_DATA data;
path = normalize_reg_path(mem_ctx, key);
if (!path) {
return make_tdb_data(NULL, 0);
}
data = dbwrap_fetch_bystring(db, mem_ctx, path);
TALLOC_FREE(path);
return data;
}
/**
* check whether a given key name represents a base key,
* i.e one without a subkey separator ('\').
*/
static bool regdb_key_is_base_key(const char *key)
{
TALLOC_CTX *mem_ctx = talloc_stackframe();
bool ret = false;
char *path;
if (key == NULL) {
goto done;
}
path = normalize_reg_path(mem_ctx, key);
if (path == NULL) {
DEBUG(0, ("out of memory! (talloc failed)\n"));
goto done;
}
if (*path == '\0') {
goto done;
}
ret = (strrchr(path, '\\') == NULL);
done:
TALLOC_FREE(mem_ctx);
return ret;
}
/*
* regdb_key_exists() is a very frequent operation. It can be quite
* time-consuming to fully fetch the parent's subkey list, talloc_strdup all
* subkeys and then compare the keyname linearly to all the parent's subkeys.
*
* The following code tries to make this operation as efficient as possible:
* Per registry key we create a list of subkeys that is very efficient to
* search for existence of a subkey. Its format is:
*
* 4 bytes num_subkeys
* 4*num_subkey bytes offset into the string array
* then follows a sorted list of subkeys in uppercase
*
* This record is created by create_sorted_subkeys() on demand if it does not
* exist. scan_parent_subkeys() uses regdb->parse_record to search the sorted
* list, the parsing code and the binary search can be found in
* parent_subkey_scanner. The code uses parse_record() to avoid a memcpy of
* the potentially large subkey record.
*
* The sorted subkey record is deleted in regdb_store_keys_internal2 and
* recreated on demand.
*/
static int cmp_keynames(char **p1, char **p2)
{
return StrCaseCmp(*p1, *p2);
}
struct create_sorted_subkeys_context {
const char *key;
const char *sorted_keyname;
};
static NTSTATUS create_sorted_subkeys_action(struct db_context *db,
void *private_data)
{
char **sorted_subkeys;
struct regsubkey_ctr *ctr;
NTSTATUS status;
char *buf;
char *p;
int i;
size_t len;
int num_subkeys;
struct create_sorted_subkeys_context *sorted_ctx;
sorted_ctx = (struct create_sorted_subkeys_context *)private_data;
/*
* In this function, we only treat failing of the actual write to
* the db as a real error. All preliminary errors, at a stage when
* nothing has been written to the DB yet are treated as success
* to be committed (as an empty transaction).
*
* The reason is that this (disposable) call might be nested in other
* transactions. Doing a cancel here would destroy the possibility of
* a transaction_commit for transactions that we might be wrapped in.
*/
status = werror_to_ntstatus(regsubkey_ctr_init(talloc_tos(), &ctr));
if (!NT_STATUS_IS_OK(status)) {
/* don't treat this as an error */
status = NT_STATUS_OK;
goto done;
}
status = werror_to_ntstatus(regdb_fetch_keys_internal(db,
sorted_ctx->key,
ctr));
if (!NT_STATUS_IS_OK(status)) {
/* don't treat this as an error */
status = NT_STATUS_OK;
goto done;
}
num_subkeys = regsubkey_ctr_numkeys(ctr);
sorted_subkeys = talloc_array(ctr, char *, num_subkeys);
if (sorted_subkeys == NULL) {
/* don't treat this as an error */
goto done;
}
len = 4 + 4*num_subkeys;
for (i = 0; i < num_subkeys; i++) {
sorted_subkeys[i] = talloc_strdup_upper(sorted_subkeys,
regsubkey_ctr_specific_key(ctr, i));
if (sorted_subkeys[i] == NULL) {
/* don't treat this as an error */
goto done;
}
len += strlen(sorted_subkeys[i])+1;
}
TYPESAFE_QSORT(sorted_subkeys, num_subkeys, cmp_keynames);
buf = talloc_array(ctr, char, len);
if (buf == NULL) {
/* don't treat this as an error */
goto done;
}
p = buf + 4 + 4*num_subkeys;
SIVAL(buf, 0, num_subkeys);
for (i=0; i < num_subkeys; i++) {
ptrdiff_t offset = p - buf;
SIVAL(buf, 4 + 4*i, offset);
strlcpy(p, sorted_subkeys[i], len-offset);
p += strlen(sorted_subkeys[i]) + 1;
}
status = dbwrap_store_bystring(
db, sorted_ctx->sorted_keyname, make_tdb_data((uint8_t *)buf,
len),
TDB_REPLACE);
done:
talloc_free(ctr);
return status;
}
static NTSTATUS create_sorted_subkeys_internal(const char *key,
const char *sorted_keyname)
{
NTSTATUS status;
struct create_sorted_subkeys_context sorted_ctx;
sorted_ctx.key = key;
sorted_ctx.sorted_keyname = sorted_keyname;
status = dbwrap_trans_do(regdb,
create_sorted_subkeys_action,
&sorted_ctx);
return status;
}
static NTSTATUS create_sorted_subkeys(const char *key)
{
char *sorted_subkeys_keyname;
NTSTATUS status;
sorted_subkeys_keyname = talloc_asprintf(talloc_tos(), "%s\\%s",
REG_SORTED_SUBKEYS_PREFIX,
key);
if (sorted_subkeys_keyname == NULL) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
status = create_sorted_subkeys_internal(key, sorted_subkeys_keyname);
done:
return status;
}
struct scan_subkey_state {
char *name;
bool scanned;
bool found;
};
static int parent_subkey_scanner(TDB_DATA key, TDB_DATA data,
void *private_data)
{
struct scan_subkey_state *state =
(struct scan_subkey_state *)private_data;
uint32_t num_subkeys;
uint32_t l, u;
if (data.dsize < sizeof(uint32_t)) {
return -1;
}
state->scanned = true;
state->found = false;
tdb_unpack(data.dptr, data.dsize, "d", &num_subkeys);
l = 0;
u = num_subkeys;
while (l < u) {
uint32_t idx = (l+u)/2;
char *s = (char *)data.dptr + IVAL(data.dptr, 4 + 4*idx);
int comparison = strcmp(state->name, s);
if (comparison < 0) {
u = idx;
} else if (comparison > 0) {
l = idx + 1;
} else {
state->found = true;
return 0;
}
}
return 0;
}
static bool scan_parent_subkeys(struct db_context *db, const char *parent,
const char *name)
{
char *path = NULL;
char *key = NULL;
struct scan_subkey_state state = { 0, };
bool result = false;
int res;
state.name = NULL;
path = normalize_reg_path(talloc_tos(), parent);
if (path == NULL) {
goto fail;
}
key = talloc_asprintf(talloc_tos(), "%s\\%s",
REG_SORTED_SUBKEYS_PREFIX, path);
if (key == NULL) {
goto fail;
}
state.name = talloc_strdup_upper(talloc_tos(), name);
if (state.name == NULL) {
goto fail;
}
state.scanned = false;
res = db->parse_record(db, string_term_tdb_data(key),
parent_subkey_scanner, &state);
if (state.scanned) {
result = state.found;
} else {
NTSTATUS status;
res = db->transaction_start(db);
if (res != 0) {
DEBUG(0, ("error starting transaction\n"));
goto fail;
}
status = create_sorted_subkeys_internal(path, key);
if (!NT_STATUS_IS_OK(status)) {
res = db->transaction_cancel(db);
if (res != 0) {
smb_panic("Failed to cancel transaction.");
}
goto fail;
}
res = db->parse_record(db, string_term_tdb_data(key),
parent_subkey_scanner, &state);
if ((res == 0) && (state.scanned)) {
result = state.found;
}
res = db->transaction_commit(db);
if (res != 0) {
DEBUG(0, ("error committing transaction\n"));
result = false;
}
}
fail:
TALLOC_FREE(path);
TALLOC_FREE(state.name);
return result;
}
/**
* Check for the existence of a key.
*
* Existence of a key is authoritatively defined by its
* existence in the list of subkeys of its parent key.
* The exeption of this are keys without a parent key,
* i.e. the "base" keys (HKLM, HKCU, ...).
*/
static bool regdb_key_exists(struct db_context *db, const char *key)
{
TALLOC_CTX *mem_ctx = talloc_stackframe();
TDB_DATA value;
bool ret = false;
char *path, *p;
if (key == NULL) {
goto done;
}
path = normalize_reg_path(mem_ctx, key);
if (path == NULL) {
DEBUG(0, ("out of memory! (talloc failed)\n"));
goto done;
}
if (*path == '\0') {
goto done;
}
p = strrchr(path, '\\');
if (p == NULL) {
/* this is a base key */
value = regdb_fetch_key_internal(db, mem_ctx, path);
ret = (value.dptr != NULL);
} else {
*p = '\0';
ret = scan_parent_subkeys(db, path, p+1);
}
done:
TALLOC_FREE(mem_ctx);
return ret;
}
/***********************************************************************
Retrieve an array of strings containing subkeys. Memory should be
released by the caller.
***********************************************************************/
static WERROR regdb_fetch_keys_internal(struct db_context *db, const char *key,
struct regsubkey_ctr *ctr)
{
WERROR werr;
uint32_t num_items;
uint8 *buf;
uint32 buflen, len;
int i;
fstring subkeyname;
TALLOC_CTX *frame = talloc_stackframe();
TDB_DATA value;
DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
if (!regdb_key_exists(db, key)) {
DEBUG(10, ("key [%s] not found\n", key));
werr = WERR_NOT_FOUND;
goto done;
}
werr = regsubkey_ctr_set_seqnum(ctr, db->get_seqnum(db));
W_ERROR_NOT_OK_GOTO_DONE(werr);
value = regdb_fetch_key_internal(db, frame, key);
if (value.dsize == 0 || value.dptr == NULL) {
DEBUG(10, ("regdb_fetch_keys: no subkeys found for key [%s]\n",
key));
goto done;
}
buf = value.dptr;
buflen = value.dsize;
len = tdb_unpack( buf, buflen, "d", &num_items);
if (len == (uint32_t)-1) {
werr = WERR_NOT_FOUND;
goto done;
}
werr = regsubkey_ctr_reinit(ctr);
W_ERROR_NOT_OK_GOTO_DONE(werr);
for (i=0; i<num_items; i++) {
len += tdb_unpack(buf+len, buflen-len, "f", subkeyname);
werr = regsubkey_ctr_addkey(ctr, subkeyname);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(5, ("regdb_fetch_keys: regsubkey_ctr_addkey "
"failed: %s\n", win_errstr(werr)));
num_items = 0;
goto done;
}
}
DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
done:
TALLOC_FREE(frame);
return werr;
}
int regdb_fetch_keys(const char *key, struct regsubkey_ctr *ctr)
{
WERROR werr;
werr = regdb_fetch_keys_internal(regdb, key, ctr);
if (!W_ERROR_IS_OK(werr)) {
return -1;
}
return regsubkey_ctr_numkeys(ctr);
}
/****************************************************************************
Unpack a list of registry values frem the TDB
***************************************************************************/
static int regdb_unpack_values(struct regval_ctr *values, uint8 *buf, int buflen)
{
int len = 0;
uint32 type;
fstring valuename;
uint32 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 */
type = REG_NONE;
size = 0;
data_p = NULL;
valuename[0] = '\0';
len += tdb_unpack(buf+len, buflen-len, "fdB",
valuename,
&type,
&size,
&data_p);
regval_ctr_addvalue(values, valuename, type,
(uint8_t *)data_p, size);
SAFE_FREE(data_p); /* 'B' option to tdb_unpack 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(struct regval_ctr *values, uint8 *buf, int buflen)
{
int len = 0;
int i;
struct regval_blob *val;
int num_values;
if ( !values )
return 0;
num_values = regval_ctr_numvals( values );
/* 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_values_internal(struct db_context *db, const char* key,
struct regval_ctr *values)
{
char *keystr = NULL;
TALLOC_CTX *ctx = talloc_stackframe();
int ret = 0;
TDB_DATA value;
WERROR werr;
DEBUG(10,("regdb_fetch_values: Looking for value of key [%s] \n", key));
if (!regdb_key_exists(db, key)) {
goto done;
}
keystr = talloc_asprintf(ctx, "%s\\%s", REG_VALUE_PREFIX, key);
if (!keystr) {
goto done;
}
werr = regval_ctr_set_seqnum(values, db->get_seqnum(db));
W_ERROR_NOT_OK_GOTO_DONE(werr);
value = regdb_fetch_key_internal(db, ctx, keystr);
if (!value.dptr) {
/* all keys have zero values by default */
goto done;
}
regdb_unpack_values(values, value.dptr, value.dsize);
ret = regval_ctr_numvals(values);
done:
TALLOC_FREE(ctx);
return ret;
}
int regdb_fetch_values(const char* key, struct regval_ctr *values)
{
return regdb_fetch_values_internal(regdb, key, values);
}
static bool regdb_store_values_internal(struct db_context *db, const char *key,
struct regval_ctr *values)
{
TDB_DATA old_data, data;
char *keystr = NULL;
TALLOC_CTX *ctx = talloc_stackframe();
int len;
NTSTATUS status;
bool result = false;
DEBUG(10,("regdb_store_values: Looking for value of key [%s] \n", key));
if (!regdb_key_exists(db, key)) {
goto done;
}
ZERO_STRUCT(data);
len = regdb_pack_values(values, data.dptr, data.dsize);
if (len <= 0) {
DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
goto done;
}
data.dptr = TALLOC_ARRAY(ctx, uint8, len);
data.dsize = len;
len = regdb_pack_values(values, data.dptr, data.dsize);
SMB_ASSERT( len == data.dsize );
keystr = talloc_asprintf(ctx, "%s\\%s", REG_VALUE_PREFIX, key );
if (!keystr) {
goto done;
}
keystr = normalize_reg_path(ctx, keystr);
if (!keystr) {
goto done;
}
old_data = dbwrap_fetch_bystring(db, ctx, keystr);
if ((old_data.dptr != NULL)
&& (old_data.dsize == data.dsize)
&& (memcmp(old_data.dptr, data.dptr, data.dsize) == 0))
{
result = true;
goto done;
}
status = dbwrap_trans_store_bystring(db, keystr, data, TDB_REPLACE);
result = NT_STATUS_IS_OK(status);
done:
TALLOC_FREE(ctx);
return result;
}
bool regdb_store_values(const char *key, struct regval_ctr *values)
{
return regdb_store_values_internal(regdb, key, values);
}
static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
struct security_descriptor **psecdesc)
{
char *tdbkey;
TDB_DATA data;
NTSTATUS status;
TALLOC_CTX *tmp_ctx = talloc_stackframe();
WERROR err = WERR_OK;
DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
if (!regdb_key_exists(regdb, key)) {
err = WERR_BADFILE;
goto done;
}
tdbkey = talloc_asprintf(tmp_ctx, "%s\\%s", REG_SECDESC_PREFIX, key);
if (tdbkey == NULL) {
err = WERR_NOMEM;
goto done;
}
tdbkey = normalize_reg_path(tmp_ctx, tdbkey);
if (tdbkey == NULL) {
err = WERR_NOMEM;
goto done;
}
data = dbwrap_fetch_bystring(regdb, tmp_ctx, tdbkey);
if (data.dptr == NULL) {
err = WERR_BADFILE;
goto done;
}
status = unmarshall_sec_desc(mem_ctx, (uint8 *)data.dptr, data.dsize,
psecdesc);
if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
err = WERR_NOMEM;
} else if (!NT_STATUS_IS_OK(status)) {
err = WERR_REG_CORRUPT;
}
done:
TALLOC_FREE(tmp_ctx);
return err;
}
static WERROR regdb_set_secdesc(const char *key,
struct security_descriptor *secdesc)
{
TALLOC_CTX *mem_ctx = talloc_stackframe();
char *tdbkey;
WERROR err = WERR_NOMEM;
TDB_DATA tdbdata;
if (!regdb_key_exists(regdb, key)) {
err = WERR_BADFILE;
goto done;
}
tdbkey = talloc_asprintf(mem_ctx, "%s\\%s", REG_SECDESC_PREFIX, key);
if (tdbkey == NULL) {
goto done;
}
tdbkey = normalize_reg_path(mem_ctx, tdbkey);
if (tdbkey == NULL) {
err = WERR_NOMEM;
goto done;
}
if (secdesc == NULL) {
/* assuming a delete */
err = ntstatus_to_werror(dbwrap_trans_delete_bystring(regdb,
tdbkey));
goto done;
}
err = ntstatus_to_werror(marshall_sec_desc(mem_ctx, secdesc,
&tdbdata.dptr,
&tdbdata.dsize));
W_ERROR_NOT_OK_GOTO_DONE(err);
err = ntstatus_to_werror(dbwrap_trans_store_bystring(regdb, tdbkey,
tdbdata, 0));
done:
TALLOC_FREE(mem_ctx);
return err;
}
bool regdb_subkeys_need_update(struct regsubkey_ctr *subkeys)
{
return (regdb_get_seqnum() != regsubkey_ctr_get_seqnum(subkeys));
}
bool regdb_values_need_update(struct regval_ctr *values)
{
return (regdb_get_seqnum() != regval_ctr_get_seqnum(values));
}
/*
* Table of function pointers for default access
*/
struct registry_ops regdb_ops = {
.fetch_subkeys = regdb_fetch_keys,
.fetch_values = regdb_fetch_values,
.store_subkeys = regdb_store_keys,
.store_values = regdb_store_values,
.create_subkey = regdb_create_subkey,
.delete_subkey = regdb_delete_subkey,
.get_secdesc = regdb_get_secdesc,
.set_secdesc = regdb_set_secdesc,
.subkeys_need_update = regdb_subkeys_need_update,
.values_need_update = regdb_values_need_update
};
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