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/*
Unix SMB/CIFS implementation.
Transparent registry backend handling
Copyright (C) Jelmer Vernooij 2003-2007.
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 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/>.
*/
#include "includes.h"
#include "lib/registry/registry.h"
#include "librpc/gen_ndr/winreg.h"
/**
* @file
* @brief Registry utility functions
*/
static const struct {
uint32_t id;
const char *name;
} reg_value_types[] = {
{ REG_SZ, "REG_SZ" },
{ REG_DWORD, "REG_DWORD" },
{ REG_BINARY, "REG_BINARY" },
{ REG_EXPAND_SZ, "REG_EXPAND_SZ" },
{ REG_NONE, "REG_NONE" },
{ 0, NULL }
};
/** Return string description of registry value type */
_PUBLIC_ const char *str_regtype(int type)
{
int i;
for (i = 0; reg_value_types[i].name; i++) {
if (reg_value_types[i].id == type)
return reg_value_types[i].name;
}
return "Unknown";
}
_PUBLIC_ char *reg_val_data_string(TALLOC_CTX *mem_ctx, uint32_t type,
const DATA_BLOB data)
{
char *ret = NULL;
if (data.length == 0)
return talloc_strdup(mem_ctx, "");
switch (type) {
case REG_EXPAND_SZ:
case REG_SZ:
convert_string_talloc(mem_ctx, CH_UTF16, CH_UNIX, data.data, data.length,
(void **)&ret);
return ret;
case REG_BINARY:
ret = data_blob_hex_string(mem_ctx, &data);
return ret;
case REG_DWORD:
if (*(int *)data.data == 0)
return talloc_strdup(mem_ctx, "0");
return talloc_asprintf(mem_ctx, "0x%x", *(int *)data.data);
case REG_MULTI_SZ:
/* FIXME */
break;
default:
break;
}
return ret;
}
/** Generate a string that describes a registry value */
_PUBLIC_ char *reg_val_description(TALLOC_CTX *mem_ctx, const char *name,
uint32_t data_type,
const DATA_BLOB data)
{
return talloc_asprintf(mem_ctx, "%s = %s : %s", name?name:"<No Name>",
str_regtype(data_type),
reg_val_data_string(mem_ctx, data_type, data));
}
_PUBLIC_ bool reg_string_to_val(TALLOC_CTX *mem_ctx, const char *type_str, const char *data_str, uint32_t *type, DATA_BLOB *data)
{
int i;
*type = -1;
/* Find the correct type */
for (i = 0; reg_value_types[i].name; i++) {
if (!strcmp(reg_value_types[i].name, type_str)) {
*type = reg_value_types[i].id;
break;
}
}
if (*type == -1)
return false;
/* Convert data appropriately */
switch (*type)
{
case REG_SZ:
case REG_EXPAND_SZ:
data->length = convert_string_talloc(mem_ctx, CH_UNIX, CH_UTF16, data_str, strlen(data_str), (void **)&data->data);
break;
case REG_DWORD: {
uint32_t tmp = strtol(data_str, NULL, 0);
*data = data_blob_talloc(mem_ctx, &tmp, 4);
}
break;
case REG_NONE:
ZERO_STRUCTP(data);
break;
case REG_BINARY:
*data = strhex_to_data_blob(data_str);
talloc_steal(mem_ctx, data->data);
break;
default:
/* FIXME */
return false;
}
return true;
}
/** Open a key by name (including the predefined key name!) */
WERROR reg_open_key_abs(TALLOC_CTX *mem_ctx, struct registry_context *handle, const char *name, struct registry_key **result)
{
struct registry_key *predef;
WERROR error;
int predeflength;
char *predefname;
if (strchr(name, '\\') != NULL)
predeflength = strchr(name, '\\')-name;
else
predeflength = strlen(name);
predefname = talloc_strndup(mem_ctx, name, predeflength);
error = reg_get_predefined_key_by_name(handle, predefname, &predef);
talloc_free(predefname);
if (!W_ERROR_IS_OK(error)) {
return error;
}
if (strchr(name, '\\')) {
return reg_open_key(mem_ctx, predef, strchr(name, '\\')+1, result);
} else {
*result = predef;
return WERR_OK;
}
}
static WERROR get_abs_parent(TALLOC_CTX *mem_ctx, struct registry_context *ctx,
const char *path, struct registry_key **parent,
const char **name)
{
char *parent_name;
WERROR error;
if (strchr(path, '\\') == NULL) {
return WERR_FOOBAR;
}
parent_name = talloc_strndup(mem_ctx, path, strrchr(path, '\\')-path);
error = reg_open_key_abs(mem_ctx, ctx, parent_name, parent);
if (!W_ERROR_IS_OK(error)) {
return error;
}
*name = talloc_strdup(mem_ctx, strrchr(path, '\\')+1);
return WERR_OK;
}
WERROR reg_key_del_abs(struct registry_context *ctx, const char *path)
{
struct registry_key *parent;
const char *n;
TALLOC_CTX *mem_ctx = talloc_init("reg_key_del_abs");
WERROR error;
if (!strchr(path, '\\')) {
return WERR_FOOBAR;
}
error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
if (W_ERROR_IS_OK(error)) {
error = reg_key_del(parent, n);
}
talloc_free(mem_ctx);
return error;
}
WERROR reg_key_add_abs(TALLOC_CTX *mem_ctx, struct registry_context *ctx,
const char *path, uint32_t access_mask,
struct security_descriptor *sec_desc,
struct registry_key **result)
{
struct registry_key *parent;
const char *n;
WERROR error;
if (!strchr(path, '\\')) {
return WERR_ALREADY_EXISTS;
}
error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
if (!W_ERROR_IS_OK(error)) {
DEBUG(2, ("Opening parent of %s failed with %s\n", path,
win_errstr(error)));
return error;
}
error = reg_key_add_name(mem_ctx, parent, n, NULL, sec_desc, result);
return error;
}
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