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/*
Unix SMB/CIFS implementation.
Reading Registry.pol PReg registry files
Copyright (C) Wilco Baan Hofman 2006
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.
*/
#include "includes.h"
#include "lib/registry/registry.h"
#include "lib/registry/patchfile.h"
#include "system/filesys.h"
struct preg_data {
int fd;
};
static WERROR preg_read_utf16(int fd, char *c)
{
uint16_t v;
if (read(fd, &v, 2) < 2) {
return WERR_GENERAL_FAILURE;
}
push_codepoint(global_smb_iconv_convenience, c, v);
return WERR_OK;
}
/* FIXME These functions need to be implemented */
static WERROR reg_preg_diff_add_key(void *_data, const char *key_name)
{
return WERR_OK;
}
static WERROR reg_preg_diff_del_key(void *_data, const char *key_name)
{
return WERR_OK;
}
static WERROR reg_preg_diff_set_value(void *_data, const char *key_name,
const char *value_name,
uint32_t value_type, DATA_BLOB value_data)
{
return WERR_OK;
}
static WERROR reg_preg_diff_del_value(void *_data, const char *key_name,
const char *value_name)
{
return WERR_OK;
}
static WERROR reg_preg_diff_del_all_values(void *_data, const char *key_name)
{
return WERR_OK;
}
static WERROR reg_preg_diff_done(void *_data)
{
struct preg_data *data = (struct preg_data *)_data;
close(data->fd);
talloc_free(data);
return WERR_OK;
}
/**
* Save registry diff
*/
_PUBLIC_ WERROR reg_preg_diff_save(TALLOC_CTX *ctx, const char *filename,
struct reg_diff_callbacks **callbacks,
void **callback_data)
{
struct preg_data *data;
struct {
char hdr[4];
uint32_t version;
} preg_header;
data = talloc_zero(ctx, struct preg_data);
*callback_data = data;
if (filename) {
data->fd = open(filename, O_CREAT, 0755);
if (data->fd == -1) {
DEBUG(0, ("Unable to open %s\n", filename));
return WERR_BADFILE;
}
} else {
data->fd = STDOUT_FILENO;
}
snprintf(preg_header.hdr, 4, "PReg");
SIVAL(&preg_header, 4, 1);
write(data->fd, (uint8_t *)&preg_header,8);
*callbacks = talloc(ctx, struct reg_diff_callbacks);
(*callbacks)->add_key = reg_preg_diff_add_key;
(*callbacks)->del_key = reg_preg_diff_del_key;
(*callbacks)->set_value = reg_preg_diff_set_value;
(*callbacks)->del_value = reg_preg_diff_del_value;
(*callbacks)->del_all_values = reg_preg_diff_del_all_values;
(*callbacks)->done = reg_preg_diff_done;
return WERR_OK;
}
/**
* Load diff file
*/
_PUBLIC_ WERROR reg_preg_diff_load(int fd,
const struct reg_diff_callbacks *callbacks,
void *callback_data)
{
struct {
char hdr[4];
uint32_t version;
} preg_header;
char *buf;
size_t buf_size = 1024;
char *buf_ptr;
TALLOC_CTX *mem_ctx = talloc_init("reg_preg_diff_load");
WERROR ret = WERR_OK;
DATA_BLOB data = {NULL, 0};
char *key = NULL;
char *value_name = NULL;
buf = talloc_array(mem_ctx, char, buf_size);
buf_ptr = buf;
/* Read first 8 bytes (the header) */
if (read(fd, &preg_header, 8) != 8) {
DEBUG(0, ("Could not read PReg file: %s\n",
strerror(errno)));
ret = WERR_GENERAL_FAILURE;
goto cleanup;
}
if (strncmp(preg_header.hdr, "PReg", 4) != 0) {
DEBUG(0, ("This file is not a valid preg registry file\n"));
ret = WERR_GENERAL_FAILURE;
goto cleanup;
}
if (preg_header.version > 1) {
DEBUG(0, ("Warning: file format version is higher than expected.\n"));
}
/* Read the entries */
while(1) {
uint32_t value_type, length;
if (!W_ERROR_IS_OK(preg_read_utf16(fd, buf_ptr))) {
break;
}
if (*buf_ptr != '[') {
DEBUG(0, ("Error in PReg file.\n"));
ret = WERR_GENERAL_FAILURE;
goto cleanup;
}
/* Get the path */
buf_ptr = buf;
while (W_ERROR_IS_OK(preg_read_utf16(fd, buf_ptr)) &&
*buf_ptr != ';' && buf_ptr-buf < buf_size) {
buf_ptr++;
}
key = talloc_asprintf(mem_ctx, "\\%s", buf);
/* Get the name */
buf_ptr = buf;
while (W_ERROR_IS_OK(preg_read_utf16(fd, buf_ptr)) &&
*buf_ptr != ';' && buf_ptr-buf < buf_size) {
buf_ptr++;
}
value_name = talloc_strdup(mem_ctx, buf);
/* Get the type */
if (read(fd, &value_type, 4) < 4) {
DEBUG(0, ("Error while reading PReg\n"));
ret = WERR_GENERAL_FAILURE;
goto cleanup;
}
/* Read past delimiter */
buf_ptr = buf;
if (!(W_ERROR_IS_OK(preg_read_utf16(fd, buf_ptr)) &&
*buf_ptr == ';') && buf_ptr-buf < buf_size) {
DEBUG(0, ("Error in PReg file.\n"));
ret = WERR_GENERAL_FAILURE;
goto cleanup;
}
/* Get data length */
if (read(fd, &length, 4) < 4) {
DEBUG(0, ("Error while reading PReg\n"));
ret = WERR_GENERAL_FAILURE;
goto cleanup;
}
/* Read past delimiter */
buf_ptr = buf;
if (!(W_ERROR_IS_OK(preg_read_utf16(fd, buf_ptr)) &&
*buf_ptr == ';') && buf_ptr-buf < buf_size) {
DEBUG(0, ("Error in PReg file.\n"));
ret = WERR_GENERAL_FAILURE;
goto cleanup;
}
/* Get the data */
buf_ptr = buf;
if (length < buf_size &&
read(fd, buf_ptr, length) != length) {
DEBUG(0, ("Error while reading PReg\n"));
ret = WERR_GENERAL_FAILURE;
goto cleanup;
}
data = data_blob_talloc(mem_ctx, buf, length);
/* Check if delimiter is in place (whine if it isn't) */
buf_ptr = buf;
if (!(W_ERROR_IS_OK(preg_read_utf16(fd, buf_ptr)) &&
*buf_ptr == ']') && buf_ptr-buf < buf_size) {
DEBUG(0, ("Warning: Missing ']' in PReg file, expected ']', got '%c' 0x%x.\n",
*buf_ptr, *buf_ptr));
}
if (strcasecmp(value_name, "**DelVals") == 0) {
callbacks->del_all_values(callback_data, key);
} else if (strncasecmp(value_name, "**Del.",6) == 0) {
char *p = value_name+6;
callbacks->del_value(callback_data, key, p);
} else if (strcasecmp(value_name, "**DeleteValues") == 0) {
char *p, *q;
p = (char *) data.data;
while ((q = strchr_m(p, ';'))) {
*q = '\0';
q++;
callbacks->del_value(callback_data, key, p);
p = q;
}
callbacks->del_value(callback_data, key, p);
} else if (strcasecmp(value_name, "**DeleteKeys") == 0) {
char *p, *q, *full_key;
p = (char *) data.data;
while ((q = strchr_m(p, ';'))) {
*q = '\0';
q++;
full_key = talloc_asprintf(mem_ctx, "%s\\%s",
key, p);
callbacks->del_key(callback_data, full_key);
talloc_free(full_key);
p = q;
}
full_key = talloc_asprintf(mem_ctx, "%s\\%s", key, p);
callbacks->del_key(callback_data, full_key);
talloc_free(full_key);
} else {
callbacks->add_key(callback_data, key);
callbacks->set_value(callback_data, key, value_name,
value_type, data);
}
}
cleanup:
close(fd);
talloc_free(data.data);
talloc_free(key);
talloc_free(value_name);
talloc_free(buf);
return ret;
}
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