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samba-mirror/source3/registry/reg_api.c

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/*
* Unix SMB/CIFS implementation.
* Virtual Windows Registry Layer
* Copyright (C) Volker Lendecke 2006
* Copyright (C) Michael Adam 2007-2008
*
* 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/>.
*/
/* Attempt to wrap the existing API in a more winreg.idl-like way */
/*
* Here is a list of winreg.idl functions and corresponding implementations
* provided here:
*
* 0x00 winreg_OpenHKCR
* 0x01 winreg_OpenHKCU
* 0x02 winreg_OpenHKLM
* 0x03 winreg_OpenHKPD
* 0x04 winreg_OpenHKU
* 0x05 winreg_CloseKey
* 0x06 winreg_CreateKey reg_createkey
* 0x07 winreg_DeleteKey reg_deletekey
* 0x08 winreg_DeleteValue reg_deletevalue
* 0x09 winreg_EnumKey reg_enumkey
* 0x0a winreg_EnumValue reg_enumvalue
* 0x0b winreg_FlushKey
* 0x0c winreg_GetKeySecurity reg_getkeysecurity
* 0x0d winreg_LoadKey
* 0x0e winreg_NotifyChangeKeyValue
* 0x0f winreg_OpenKey reg_openkey
* 0x10 winreg_QueryInfoKey reg_queryinfokey
* 0x11 winreg_QueryValue reg_queryvalue
* 0x12 winreg_ReplaceKey
* 0x13 winreg_RestoreKey reg_restorekey
* 0x14 winreg_SaveKey reg_savekey
* 0x15 winreg_SetKeySecurity reg_setkeysecurity
* 0x16 winreg_SetValue reg_setvalue
* 0x17 winreg_UnLoadKey
* 0x18 winreg_InitiateSystemShutdown
* 0x19 winreg_AbortSystemShutdown
* 0x1a winreg_GetVersion reg_getversion
* 0x1b winreg_OpenHKCC
* 0x1c winreg_OpenHKDD
* 0x1d winreg_QueryMultipleValues
* 0x1e winreg_InitiateSystemShutdownEx
* 0x1f winreg_SaveKeyEx
* 0x20 winreg_OpenHKPT
* 0x21 winreg_OpenHKPN
* 0x22 winreg_QueryMultipleValues2
*
*/
#include "includes.h"
#include "registry.h"
#include "reg_cachehook.h"
#include "regfio.h"
#include "reg_util.h"
#include "reg_backend_db.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_REGISTRY
/**********************************************************************
* Helper functions
**********************************************************************/
static WERROR fill_value_cache(struct registry_key *key)
{
if (key->values != NULL) {
if (!reg_values_need_update(key->key, key->values)) {
return WERR_OK;
}
}
if (!(key->values = TALLOC_ZERO_P(key, struct regval_ctr))) {
return WERR_NOMEM;
}
if (fetch_reg_values(key->key, key->values) == -1) {
TALLOC_FREE(key->values);
return WERR_BADFILE;
}
return WERR_OK;
}
static WERROR fill_subkey_cache(struct registry_key *key)
{
WERROR werr;
if (key->subkeys != NULL) {
if (!reg_subkeys_need_update(key->key, key->subkeys)) {
return WERR_OK;
}
}
werr = regsubkey_ctr_init(key, &(key->subkeys));
W_ERROR_NOT_OK_RETURN(werr);
if (fetch_reg_keys(key->key, key->subkeys) == -1) {
TALLOC_FREE(key->subkeys);
return WERR_NO_MORE_ITEMS;
}
return WERR_OK;
}
static int regkey_destructor(struct registry_key_handle *key)
{
return regdb_close();
}
static WERROR regkey_open_onelevel(TALLOC_CTX *mem_ctx,
struct registry_key *parent,
const char *name,
const struct nt_user_token *token,
uint32 access_desired,
struct registry_key **pregkey)
{
WERROR result = WERR_OK;
struct registry_key *regkey;
struct registry_key_handle *key;
struct regsubkey_ctr *subkeys = NULL;
DEBUG(7,("regkey_open_onelevel: name = [%s]\n", name));
SMB_ASSERT(strchr(name, '\\') == NULL);
if (!(regkey = TALLOC_ZERO_P(mem_ctx, struct registry_key)) ||
!(regkey->token = dup_nt_token(regkey, token)) ||
!(regkey->key = TALLOC_ZERO_P(regkey, struct registry_key_handle)))
{
result = WERR_NOMEM;
goto done;
}
if ( !(W_ERROR_IS_OK(result = regdb_open())) ) {
goto done;
}
key = regkey->key;
talloc_set_destructor(key, regkey_destructor);
2010-02-07 13:05:07 +03:00
/* initialization */
2010-02-07 13:05:07 +03:00
key->type = REG_KEY_GENERIC;
if (name[0] == '\0') {
/*
* Open a copy of the parent key
*/
if (!parent) {
result = WERR_BADFILE;
goto done;
}
key->name = talloc_strdup(key, parent->key->name);
}
else {
/*
* Normal subkey open
*/
key->name = talloc_asprintf(key, "%s%s%s",
parent ? parent->key->name : "",
parent ? "\\": "",
name);
}
if (key->name == NULL) {
result = WERR_NOMEM;
goto done;
}
/* Tag this as a Performance Counter Key */
if( StrnCaseCmp(key->name, KEY_HKPD, strlen(KEY_HKPD)) == 0 )
key->type = REG_KEY_HKPD;
2010-02-07 13:05:07 +03:00
/* Look up the table of registry I/O operations */
if ( !(key->ops = reghook_cache_find( key->name )) ) {
DEBUG(0,("reg_open_onelevel: Failed to assign "
"registry_ops to [%s]\n", key->name ));
result = WERR_BADFILE;
goto done;
}
/* check if the path really exists; failed is indicated by -1 */
/* if the subkey count failed, bail out */
result = regsubkey_ctr_init(key, &subkeys);
if (!W_ERROR_IS_OK(result)) {
goto done;
}
if ( fetch_reg_keys( key, subkeys ) == -1 ) {
result = WERR_BADFILE;
goto done;
}
TALLOC_FREE( subkeys );
if ( !regkey_access_check( key, access_desired, &key->access_granted,
token ) ) {
result = WERR_ACCESS_DENIED;
goto done;
}
*pregkey = regkey;
result = WERR_OK;
2010-02-07 13:05:07 +03:00
done:
if ( !W_ERROR_IS_OK(result) ) {
TALLOC_FREE(regkey);
}
return result;
}
WERROR reg_openhive(TALLOC_CTX *mem_ctx, const char *hive,
uint32 desired_access,
const struct nt_user_token *token,
struct registry_key **pkey)
{
SMB_ASSERT(hive != NULL);
SMB_ASSERT(hive[0] != '\0');
SMB_ASSERT(strchr(hive, '\\') == NULL);
return regkey_open_onelevel(mem_ctx, NULL, hive, token, desired_access,
pkey);
}
/**********************************************************************
* The API functions
**********************************************************************/
WERROR reg_openkey(TALLOC_CTX *mem_ctx, struct registry_key *parent,
const char *name, uint32 desired_access,
struct registry_key **pkey)
{
struct registry_key *direct_parent = parent;
WERROR err;
char *p, *path, *to_free;
size_t len;
if (!(path = SMB_STRDUP(name))) {
return WERR_NOMEM;
}
to_free = path;
len = strlen(path);
if ((len > 0) && (path[len-1] == '\\')) {
path[len-1] = '\0';
}
while ((p = strchr(path, '\\')) != NULL) {
char *name_component;
struct registry_key *tmp;
if (!(name_component = SMB_STRNDUP(path, (p - path)))) {
err = WERR_NOMEM;
goto error;
}
err = regkey_open_onelevel(mem_ctx, direct_parent,
name_component, parent->token,
KEY_ENUMERATE_SUB_KEYS, &tmp);
SAFE_FREE(name_component);
if (!W_ERROR_IS_OK(err)) {
goto error;
}
if (direct_parent != parent) {
TALLOC_FREE(direct_parent);
}
direct_parent = tmp;
path = p+1;
}
err = regkey_open_onelevel(mem_ctx, direct_parent, path, parent->token,
desired_access, pkey);
error:
if (direct_parent != parent) {
TALLOC_FREE(direct_parent);
}
SAFE_FREE(to_free);
return err;
}
WERROR reg_enumkey(TALLOC_CTX *mem_ctx, struct registry_key *key,
uint32 idx, char **name, NTTIME *last_write_time)
{
WERROR err;
if (!(key->key->access_granted & KEY_ENUMERATE_SUB_KEYS)) {
return WERR_ACCESS_DENIED;
}
if (!W_ERROR_IS_OK(err = fill_subkey_cache(key))) {
return err;
}
if (idx >= regsubkey_ctr_numkeys(key->subkeys)) {
return WERR_NO_MORE_ITEMS;
}
if (!(*name = talloc_strdup(mem_ctx,
regsubkey_ctr_specific_key(key->subkeys, idx))))
{
return WERR_NOMEM;
}
if (last_write_time) {
*last_write_time = 0;
}
return WERR_OK;
}
WERROR reg_enumvalue(TALLOC_CTX *mem_ctx, struct registry_key *key,
uint32 idx, char **pname, struct registry_value **pval)
{
struct registry_value *val;
WERROR err;
if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
return WERR_ACCESS_DENIED;
}
if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
return err;
}
if (idx >= key->values->num_values) {
return WERR_NO_MORE_ITEMS;
}
err = registry_pull_value(mem_ctx, &val,
key->values->values[idx]->type,
key->values->values[idx]->data_p,
key->values->values[idx]->size,
key->values->values[idx]->size);
if (!W_ERROR_IS_OK(err)) {
return err;
}
if (pname
&& !(*pname = talloc_strdup(
mem_ctx, key->values->values[idx]->valuename))) {
SAFE_FREE(val);
return WERR_NOMEM;
}
*pval = val;
return WERR_OK;
}
WERROR reg_queryvalue(TALLOC_CTX *mem_ctx, struct registry_key *key,
const char *name, struct registry_value **pval)
{
WERROR err;
uint32 i;
if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
return WERR_ACCESS_DENIED;
}
if (!(W_ERROR_IS_OK(err = fill_value_cache(key)))) {
return err;
}
for (i=0; i<key->values->num_values; i++) {
if (strequal(key->values->values[i]->valuename, name)) {
return reg_enumvalue(mem_ctx, key, i, NULL, pval);
}
}
return WERR_BADFILE;
}
WERROR reg_queryinfokey(struct registry_key *key, uint32_t *num_subkeys,
uint32_t *max_subkeylen, uint32_t *max_subkeysize,
uint32_t *num_values, uint32_t *max_valnamelen,
uint32_t *max_valbufsize, uint32_t *secdescsize,
NTTIME *last_changed_time)
{
uint32 i, max_size;
size_t max_len;
TALLOC_CTX *mem_ctx;
WERROR err;
struct security_descriptor *secdesc;
if (!(key->key->access_granted & KEY_QUERY_VALUE)) {
return WERR_ACCESS_DENIED;
}
if (!W_ERROR_IS_OK(fill_subkey_cache(key)) ||
!W_ERROR_IS_OK(fill_value_cache(key))) {
return WERR_BADFILE;
}
max_len = 0;
for (i=0; i< regsubkey_ctr_numkeys(key->subkeys); i++) {
max_len = MAX(max_len,
strlen(regsubkey_ctr_specific_key(key->subkeys, i)));
}
*num_subkeys = regsubkey_ctr_numkeys(key->subkeys);
*max_subkeylen = max_len;
*max_subkeysize = 0; /* Class length? */
max_len = 0;
max_size = 0;
for (i=0; i<key->values->num_values; i++) {
max_len = MAX(max_len,
strlen(key->values->values[i]->valuename));
max_size = MAX(max_size, key->values->values[i]->size);
}
*num_values = key->values->num_values;
*max_valnamelen = max_len;
*max_valbufsize = max_size;
if (!(mem_ctx = talloc_new(key))) {
return WERR_NOMEM;
}
err = regkey_get_secdesc(mem_ctx, key->key, &secdesc);
if (!W_ERROR_IS_OK(err)) {
TALLOC_FREE(mem_ctx);
return err;
}
2010-05-10 02:42:06 +04:00
*secdescsize = ndr_size_security_descriptor(secdesc, 0);
TALLOC_FREE(mem_ctx);
*last_changed_time = 0;
return WERR_OK;
}
WERROR reg_createkey(TALLOC_CTX *ctx, struct registry_key *parent,
const char *subkeypath, uint32 desired_access,
struct registry_key **pkey,
enum winreg_CreateAction *paction)
{
struct registry_key *key = parent;
struct registry_key *create_parent;
TALLOC_CTX *mem_ctx;
char *path, *end;
WERROR err;
/*
* We must refuse to handle subkey-paths containing
* a '/' character because at a lower level, after
* normalization, '/' is treated as a key separator
* just like '\\'.
*/
if (strchr(subkeypath, '/') != NULL) {
return WERR_INVALID_PARAM;
}
if (!(mem_ctx = talloc_new(ctx))) return WERR_NOMEM;
if (!(path = talloc_strdup(mem_ctx, subkeypath))) {
err = WERR_NOMEM;
goto done;
}
while ((end = strchr(path, '\\')) != NULL) {
struct registry_key *tmp;
enum winreg_CreateAction action;
*end = '\0';
err = reg_createkey(mem_ctx, key, path,
KEY_ENUMERATE_SUB_KEYS, &tmp, &action);
if (!W_ERROR_IS_OK(err)) {
goto done;
}
if (key != parent) {
TALLOC_FREE(key);
}
key = tmp;
path = end+1;
}
/*
* At this point, "path" contains the one-element subkey of "key". We
* can try to open it.
*/
err = reg_openkey(ctx, key, path, desired_access, pkey);
if (W_ERROR_IS_OK(err)) {
if (paction != NULL) {
*paction = REG_OPENED_EXISTING_KEY;
}
goto done;
}
if (!W_ERROR_EQUAL(err, WERR_BADFILE)) {
/*
* Something but "notfound" has happened, so bail out
*/
goto done;
}
/*
* We have to make a copy of the current key, as we opened it only
* with ENUM_SUBKEY access.
*/
err = reg_openkey(mem_ctx, key, "", KEY_CREATE_SUB_KEY,
&create_parent);
if (!W_ERROR_IS_OK(err)) {
goto done;
}
/*
* Actually create the subkey
*/
err = fill_subkey_cache(create_parent);
if (!W_ERROR_IS_OK(err)) goto done;
err = create_reg_subkey(key->key, path);
W_ERROR_NOT_OK_GOTO_DONE(err);
/*
* Now open the newly created key
*/
err = reg_openkey(ctx, create_parent, path, desired_access, pkey);
if (W_ERROR_IS_OK(err) && (paction != NULL)) {
*paction = REG_CREATED_NEW_KEY;
}
done:
TALLOC_FREE(mem_ctx);
return err;
}
WERROR reg_deletekey(struct registry_key *parent, const char *path)
{
WERROR err;
char *name, *end;
struct registry_key *tmp_key, *key;
TALLOC_CTX *mem_ctx = talloc_stackframe();
name = talloc_strdup(mem_ctx, path);
if (name == NULL) {
err = WERR_NOMEM;
goto done;
}
/* check if the key has subkeys */
err = reg_openkey(mem_ctx, parent, name, REG_KEY_READ, &key);
W_ERROR_NOT_OK_GOTO_DONE(err);
err = fill_subkey_cache(key);
W_ERROR_NOT_OK_GOTO_DONE(err);
if (regsubkey_ctr_numkeys(key->subkeys) > 0) {
err = WERR_ACCESS_DENIED;
goto done;
}
/* no subkeys - proceed with delete */
end = strrchr(name, '\\');
if (end != NULL) {
*end = '\0';
err = reg_openkey(mem_ctx, parent, name,
KEY_CREATE_SUB_KEY, &tmp_key);
W_ERROR_NOT_OK_GOTO_DONE(err);
parent = tmp_key;
name = end+1;
}
if (name[0] == '\0') {
err = WERR_INVALID_PARAM;
goto done;
}
err = delete_reg_subkey(parent->key, name);
done:
TALLOC_FREE(mem_ctx);
return err;
}
WERROR reg_setvalue(struct registry_key *key, const char *name,
const struct registry_value *val)
{
WERROR err;
DATA_BLOB value_data;
int res;
if (!(key->key->access_granted & KEY_SET_VALUE)) {
return WERR_ACCESS_DENIED;
}
if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
return err;
}
err = registry_push_value(key, val, &value_data);
if (!W_ERROR_IS_OK(err)) {
return err;
}
res = regval_ctr_addvalue(key->values, name, val->type,
value_data.data, value_data.length);
TALLOC_FREE(value_data.data);
if (res == 0) {
TALLOC_FREE(key->values);
return WERR_NOMEM;
}
if (!store_reg_values(key->key, key->values)) {
TALLOC_FREE(key->values);
return WERR_REG_IO_FAILURE;
}
return WERR_OK;
}
static WERROR reg_value_exists(struct registry_key *key, const char *name)
{
int i;
for (i=0; i<key->values->num_values; i++) {
if (strequal(key->values->values[i]->valuename, name)) {
return WERR_OK;
}
}
return WERR_BADFILE;
}
WERROR reg_deletevalue(struct registry_key *key, const char *name)
{
WERROR err;
if (!(key->key->access_granted & KEY_SET_VALUE)) {
return WERR_ACCESS_DENIED;
}
if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
return err;
}
err = reg_value_exists(key, name);
if (!W_ERROR_IS_OK(err)) {
return err;
}
regval_ctr_delvalue(key->values, name);
if (!store_reg_values(key->key, key->values)) {
TALLOC_FREE(key->values);
return WERR_REG_IO_FAILURE;
}
return WERR_OK;
}
WERROR reg_getkeysecurity(TALLOC_CTX *mem_ctx, struct registry_key *key,
struct security_descriptor **psecdesc)
{
return regkey_get_secdesc(mem_ctx, key->key, psecdesc);
}
WERROR reg_setkeysecurity(struct registry_key *key,
struct security_descriptor *psecdesc)
{
return regkey_set_secdesc(key->key, psecdesc);
}
WERROR reg_getversion(uint32_t *version)
{
if (version == NULL) {
return WERR_INVALID_PARAM;
}
*version = 0x00000005; /* Windows 2000 registry API version */
return WERR_OK;
}
/*******************************************************************
Note: topkeypat is the *full* path that this *key will be
loaded into (including the name of the key)
********************************************************************/
static WERROR reg_load_tree(REGF_FILE *regfile, const char *topkeypath,
REGF_NK_REC *key)
{
REGF_NK_REC *subkey;
struct registry_key_handle registry_key;
struct regval_ctr *values;
struct regsubkey_ctr *subkeys;
int i;
char *path = NULL;
WERROR result = WERR_OK;
/* initialize the struct registry_key_handle structure */
registry_key.ops = reghook_cache_find(topkeypath);
if (!registry_key.ops) {
DEBUG(0, ("reg_load_tree: Failed to assign registry_ops "
"to [%s]\n", topkeypath));
return WERR_BADFILE;
}
registry_key.name = talloc_strdup(regfile->mem_ctx, topkeypath);
if (!registry_key.name) {
DEBUG(0, ("reg_load_tree: Talloc failed for reg_key.name!\n"));
return WERR_NOMEM;
}
/* now start parsing the values and subkeys */
result = regsubkey_ctr_init(regfile->mem_ctx, &subkeys);
W_ERROR_NOT_OK_RETURN(result);
values = TALLOC_ZERO_P(subkeys, struct regval_ctr);
if (values == NULL) {
return WERR_NOMEM;
}
/* copy values into the struct regval_ctr */
for (i=0; i<key->num_values; i++) {
regval_ctr_addvalue(values, key->values[i].valuename,
key->values[i].type,
key->values[i].data,
(key->values[i].data_size & ~VK_DATA_IN_OFFSET));
}
/* copy subkeys into the struct regsubkey_ctr */
key->subkey_index = 0;
while ((subkey = regfio_fetch_subkey( regfile, key ))) {
result = regsubkey_ctr_addkey(subkeys, subkey->keyname);
if (!W_ERROR_IS_OK(result)) {
TALLOC_FREE(subkeys);
return result;
}
}
/* write this key and values out */
if (!store_reg_values(&registry_key, values)
|| !store_reg_keys(&registry_key, subkeys))
{
DEBUG(0,("reg_load_tree: Failed to load %s!\n", topkeypath));
result = WERR_REG_IO_FAILURE;
}
TALLOC_FREE(subkeys);
if (!W_ERROR_IS_OK(result)) {
return result;
}
/* now continue to load each subkey registry tree */
key->subkey_index = 0;
while ((subkey = regfio_fetch_subkey(regfile, key))) {
path = talloc_asprintf(regfile->mem_ctx,
"%s\\%s",
topkeypath,
subkey->keyname);
if (path == NULL) {
return WERR_NOMEM;
}
result = reg_load_tree(regfile, path, subkey);
if (!W_ERROR_IS_OK(result)) {
break;
}
}
return result;
}
/*******************************************************************
********************************************************************/
static WERROR restore_registry_key(struct registry_key_handle *krecord,
const char *fname)
{
REGF_FILE *regfile;
REGF_NK_REC *rootkey;
WERROR result;
/* open the registry file....fail if the file already exists */
regfile = regfio_open(fname, (O_RDONLY), 0);
if (regfile == NULL) {
DEBUG(0, ("restore_registry_key: failed to open \"%s\" (%s)\n",
fname, strerror(errno)));
return ntstatus_to_werror(map_nt_error_from_unix(errno));
}
/* get the rootkey from the regf file and then load the tree
via recursive calls */
if (!(rootkey = regfio_rootkey(regfile))) {
regfio_close(regfile);
return WERR_REG_FILE_INVALID;
}
result = reg_load_tree(regfile, krecord->name, rootkey);
/* cleanup */
regfio_close(regfile);
return result;
}
WERROR reg_restorekey(struct registry_key *key, const char *fname)
{
return restore_registry_key(key->key, fname);
}
/********************************************************************
********************************************************************/
static WERROR reg_write_tree(REGF_FILE *regfile, const char *keypath,
REGF_NK_REC *parent)
{
REGF_NK_REC *key;
struct regval_ctr *values;
struct regsubkey_ctr *subkeys;
int i, num_subkeys;
char *key_tmp = NULL;
char *keyname, *parentpath;
char *subkeypath = NULL;
char *subkeyname;
struct registry_key_handle registry_key;
WERROR result = WERR_OK;
struct security_descriptor *sec_desc = NULL;
if (!regfile) {
return WERR_GENERAL_FAILURE;
}
if (!keypath) {
return WERR_OBJECT_PATH_INVALID;
}
/* split up the registry key path */
key_tmp = talloc_strdup(regfile->mem_ctx, keypath);
if (!key_tmp) {
return WERR_NOMEM;
}
if (!reg_split_key(key_tmp, &parentpath, &keyname)) {
return WERR_OBJECT_PATH_INVALID;
}
if (!keyname) {
keyname = parentpath;
}
/* we need a registry_key_handle object here to enumerate subkeys and values */
ZERO_STRUCT(registry_key);
registry_key.name = talloc_strdup(regfile->mem_ctx, keypath);
if (registry_key.name == NULL) {
return WERR_NOMEM;
}
registry_key.ops = reghook_cache_find(registry_key.name);
if (registry_key.ops == NULL) {
return WERR_BADFILE;
}
/* lookup the values and subkeys */
result = regsubkey_ctr_init(regfile->mem_ctx, &subkeys);
W_ERROR_NOT_OK_RETURN(result);
values = TALLOC_ZERO_P(subkeys, struct regval_ctr);
if (values == NULL) {
return WERR_NOMEM;
}
fetch_reg_keys(&registry_key, subkeys);
fetch_reg_values(&registry_key, values);
result = regkey_get_secdesc(regfile->mem_ctx, &registry_key, &sec_desc);
if (!W_ERROR_IS_OK(result)) {
goto done;
}
/* write out this key */
key = regfio_write_key(regfile, keyname, values, subkeys, sec_desc,
parent);
if (key == NULL) {
result = WERR_CAN_NOT_COMPLETE;
goto done;
}
/* write each one of the subkeys out */
num_subkeys = regsubkey_ctr_numkeys(subkeys);
for (i=0; i<num_subkeys; i++) {
subkeyname = regsubkey_ctr_specific_key(subkeys, i);
subkeypath = talloc_asprintf(regfile->mem_ctx, "%s\\%s",
keypath, subkeyname);
if (subkeypath == NULL) {
result = WERR_NOMEM;
goto done;
}
result = reg_write_tree(regfile, subkeypath, key);
if (!W_ERROR_IS_OK(result))
goto done;
}
DEBUG(6, ("reg_write_tree: wrote key [%s]\n", keypath));
done:
TALLOC_FREE(subkeys);
TALLOC_FREE(registry_key.name);
return result;
}
static WERROR backup_registry_key(struct registry_key_handle *krecord,
const char *fname)
{
REGF_FILE *regfile;
WERROR result;
/* open the registry file....fail if the file already exists */
regfile = regfio_open(fname, (O_RDWR|O_CREAT|O_EXCL),
(S_IREAD|S_IWRITE));
if (regfile == NULL) {
DEBUG(0,("backup_registry_key: failed to open \"%s\" (%s)\n",
fname, strerror(errno) ));
return ntstatus_to_werror(map_nt_error_from_unix(errno));
}
/* write the registry tree to the file */
result = reg_write_tree(regfile, krecord->name, NULL);
/* cleanup */
regfio_close(regfile);
return result;
}
WERROR reg_savekey(struct registry_key *key, const char *fname)
{
return backup_registry_key(key->key, fname);
}
/**********************************************************************
* Higher level utility functions
**********************************************************************/
WERROR reg_deleteallvalues(struct registry_key *key)
{
WERROR err;
int i;
if (!(key->key->access_granted & KEY_SET_VALUE)) {
return WERR_ACCESS_DENIED;
}
if (!W_ERROR_IS_OK(err = fill_value_cache(key))) {
return err;
}
for (i=0; i<key->values->num_values; i++) {
regval_ctr_delvalue(key->values, key->values->values[i]->valuename);
}
if (!store_reg_values(key->key, key->values)) {
TALLOC_FREE(key->values);
return WERR_REG_IO_FAILURE;
}
return WERR_OK;
}
/*
* Utility function to open a complete registry path including the hive prefix.
*/
WERROR reg_open_path(TALLOC_CTX *mem_ctx, const char *orig_path,
uint32 desired_access, const struct nt_user_token *token,
struct registry_key **pkey)
{
struct registry_key *hive, *key;
char *path, *p;
WERROR err;
if (!(path = SMB_STRDUP(orig_path))) {
return WERR_NOMEM;
}
p = strchr(path, '\\');
if ((p == NULL) || (p[1] == '\0')) {
/*
* No key behind the hive, just return the hive
*/
err = reg_openhive(mem_ctx, path, desired_access, token,
&hive);
if (!W_ERROR_IS_OK(err)) {
SAFE_FREE(path);
return err;
}
SAFE_FREE(path);
*pkey = hive;
return WERR_OK;
}
*p = '\0';
err = reg_openhive(mem_ctx, path, KEY_ENUMERATE_SUB_KEYS, token,
&hive);
if (!W_ERROR_IS_OK(err)) {
SAFE_FREE(path);
return err;
}
err = reg_openkey(mem_ctx, hive, p+1, desired_access, &key);
TALLOC_FREE(hive);
SAFE_FREE(path);
if (!W_ERROR_IS_OK(err)) {
return err;
}
*pkey = key;
return WERR_OK;
}
/*
* Utility function to delete a registry key with all its subkeys.
* Note that reg_deletekey returns ACCESS_DENIED when called on a
* key that has subkeys.
*/
static WERROR reg_deletekey_recursive_internal(TALLOC_CTX *ctx,
struct registry_key *parent,
const char *path,
bool del_key)
{
TALLOC_CTX *mem_ctx = NULL;
WERROR werr = WERR_OK;
struct registry_key *key;
char *subkey_name = NULL;
uint32 i;
mem_ctx = talloc_new(ctx);
if (mem_ctx == NULL) {
werr = WERR_NOMEM;
goto done;
}
/* recurse through subkeys first */
werr = reg_openkey(mem_ctx, parent, path, REG_KEY_ALL, &key);
if (!W_ERROR_IS_OK(werr)) {
goto done;
}
werr = fill_subkey_cache(key);
W_ERROR_NOT_OK_GOTO_DONE(werr);
/*
* loop from top to bottom for perfomance:
* this way, we need to rehash the regsubkey containers less
*/
for (i = regsubkey_ctr_numkeys(key->subkeys) ; i > 0; i--) {
subkey_name = regsubkey_ctr_specific_key(key->subkeys, i-1);
werr = reg_deletekey_recursive_internal(mem_ctx, key,
subkey_name,
true);
W_ERROR_NOT_OK_GOTO_DONE(werr);
}
if (del_key) {
/* now delete the actual key */
werr = reg_deletekey(parent, path);
}
done:
TALLOC_FREE(mem_ctx);
return werr;
}
static WERROR reg_deletekey_recursive_trans(TALLOC_CTX *ctx,
struct registry_key *parent,
const char *path,
bool del_key)
{
WERROR werr;
werr = regdb_transaction_start();
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0, ("reg_deletekey_recursive_trans: "
"error starting transaction: %s\n",
win_errstr(werr)));
return werr;
}
werr = reg_deletekey_recursive_internal(ctx, parent, path, del_key);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(1, (__location__ " failed to delete key '%s' from key "
"'%s': %s\n", path, parent->key->name,
win_errstr(werr)));
werr = regdb_transaction_cancel();
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0, ("reg_deletekey_recursive_trans: "
"error cancelling transaction: %s\n",
win_errstr(werr)));
}
} else {
werr = regdb_transaction_commit();
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0, ("reg_deletekey_recursive_trans: "
"error committing transaction: %s\n",
win_errstr(werr)));
}
}
return werr;
}
WERROR reg_deletekey_recursive(TALLOC_CTX *ctx,
struct registry_key *parent,
const char *path)
{
return reg_deletekey_recursive_trans(ctx, parent, path, true);
}
WERROR reg_deletesubkeys_recursive(TALLOC_CTX *ctx,
struct registry_key *parent,
const char *path)
{
return reg_deletekey_recursive_trans(ctx, parent, path, false);
}
#if 0
/* these two functions are unused. */
/**
* Utility function to create a registry key without opening the hive
* before. Assumes the hive already exists.
*/
WERROR reg_create_path(TALLOC_CTX *mem_ctx, const char *orig_path,
uint32 desired_access,
const struct nt_user_token *token,
enum winreg_CreateAction *paction,
struct registry_key **pkey)
{
struct registry_key *hive;
char *path, *p;
WERROR err;
if (!(path = SMB_STRDUP(orig_path))) {
return WERR_NOMEM;
}
p = strchr(path, '\\');
if ((p == NULL) || (p[1] == '\0')) {
/*
* No key behind the hive, just return the hive
*/
err = reg_openhive(mem_ctx, path, desired_access, token,
&hive);
if (!W_ERROR_IS_OK(err)) {
SAFE_FREE(path);
return err;
}
SAFE_FREE(path);
*pkey = hive;
*paction = REG_OPENED_EXISTING_KEY;
return WERR_OK;
}
*p = '\0';
err = reg_openhive(mem_ctx, path,
(strchr(p+1, '\\') != NULL) ?
KEY_ENUMERATE_SUB_KEYS : KEY_CREATE_SUB_KEY,
token, &hive);
if (!W_ERROR_IS_OK(err)) {
SAFE_FREE(path);
return err;
}
err = reg_createkey(mem_ctx, hive, p+1, desired_access, pkey, paction);
SAFE_FREE(path);
TALLOC_FREE(hive);
return err;
}
/*
* Utility function to create a registry key without opening the hive
* before. Will not delete a hive.
*/
WERROR reg_delete_path(const struct nt_user_token *token,
const char *orig_path)
{
struct registry_key *hive;
char *path, *p;
WERROR err;
if (!(path = SMB_STRDUP(orig_path))) {
return WERR_NOMEM;
}
p = strchr(path, '\\');
if ((p == NULL) || (p[1] == '\0')) {
SAFE_FREE(path);
return WERR_INVALID_PARAM;
}
*p = '\0';
err = reg_openhive(NULL, path,
(strchr(p+1, '\\') != NULL) ?
KEY_ENUMERATE_SUB_KEYS : KEY_CREATE_SUB_KEY,
token, &hive);
if (!W_ERROR_IS_OK(err)) {
SAFE_FREE(path);
return err;
}
err = reg_deletekey(hive, p+1);
SAFE_FREE(path);
TALLOC_FREE(hive);
return err;
}
#endif /* #if 0 */