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wine/programs/regedit/regproc.c
Hugh McMaster a6063f8367 regedit: Replace heap_x*() functions with malloc(), realloc() and free(). 
Signed-off-by: Hugh McMaster <hugh.mcmaster@outlook.com>
2022-07-07 19:11:38 +02:00

1514 lines
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/*
* Registry processing routines. Routines, common for registry
* processing frontends.
*
* Copyright 1999 Sylvain St-Germain
* Copyright 2002 Andriy Palamarchuk
* Copyright 2008 Alexander N. Sørnes <alex@thehandofagony.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <errno.h>
#include <fcntl.h>
#include <io.h>
#include <windows.h>
#include <commctrl.h>
#include "main.h"
#define REG_VAL_BUF_SIZE 4096
static HKEY reg_class_keys[] = {
HKEY_LOCAL_MACHINE, HKEY_USERS, HKEY_CLASSES_ROOT,
HKEY_CURRENT_CONFIG, HKEY_CURRENT_USER, HKEY_DYN_DATA
};
/******************************************************************************
* Allocates memory and converts input from multibyte to wide chars
* Returned string must be freed by the caller
*/
static WCHAR* GetWideString(const char* strA)
{
if(strA)
{
WCHAR* strW;
int len = MultiByteToWideChar(CP_ACP, 0, strA, -1, NULL, 0);
strW = malloc(len * sizeof(WCHAR));
MultiByteToWideChar(CP_ACP, 0, strA, -1, strW, len);
return strW;
}
return NULL;
}
/******************************************************************************
* Allocates memory and converts input from multibyte to wide chars
* Returned string must be freed by the caller
*/
static WCHAR* GetWideStringN(const char* strA, int chars, DWORD *len)
{
if(strA)
{
WCHAR* strW;
*len = MultiByteToWideChar(CP_ACP, 0, strA, chars, NULL, 0);
strW = malloc(*len * sizeof(WCHAR));
MultiByteToWideChar(CP_ACP, 0, strA, chars, strW, *len);
return strW;
}
*len = 0;
return NULL;
}
/******************************************************************************
* Allocates memory and converts input from wide chars to multibyte
* Returned string must be freed by the caller
*/
char* GetMultiByteString(const WCHAR* strW)
{
if(strW)
{
char* strA;
int len = WideCharToMultiByte(CP_ACP, 0, strW, -1, NULL, 0, NULL, NULL);
strA = malloc(len);
WideCharToMultiByte(CP_ACP, 0, strW, -1, strA, len, NULL, NULL);
return strA;
}
return NULL;
}
/******************************************************************************
* Allocates memory and converts input from wide chars to multibyte
* Returned string must be freed by the caller
*/
static char* GetMultiByteStringN(const WCHAR* strW, int chars, DWORD* len)
{
if(strW)
{
char* strA;
*len = WideCharToMultiByte(CP_ACP, 0, strW, chars, NULL, 0, NULL, NULL);
strA = malloc(*len);
WideCharToMultiByte(CP_ACP, 0, strW, chars, strA, *len, NULL, NULL);
return strA;
}
*len = 0;
return NULL;
}
static WCHAR *(*get_line)(FILE *);
/* parser definitions */
enum parser_state
{
HEADER, /* parsing the registry file version header */
PARSE_WIN31_LINE, /* parsing a Windows 3.1 registry line */
LINE_START, /* at the beginning of a registry line */
KEY_NAME, /* parsing a key name */
DELETE_KEY, /* deleting a registry key */
DEFAULT_VALUE_NAME, /* parsing a default value name */
QUOTED_VALUE_NAME, /* parsing a double-quoted value name */
DATA_START, /* preparing for data parsing operations */
DELETE_VALUE, /* deleting a registry value */
DATA_TYPE, /* parsing the registry data type */
STRING_DATA, /* parsing REG_SZ data */
DWORD_DATA, /* parsing DWORD data */
HEX_DATA, /* parsing REG_BINARY, REG_NONE, REG_EXPAND_SZ or REG_MULTI_SZ data */
EOL_BACKSLASH, /* preparing to parse multiple lines of hex data */
HEX_MULTILINE, /* parsing multiple lines of hex data */
UNKNOWN_DATA, /* parsing an unhandled or invalid data type */
SET_VALUE, /* adding a value to the registry */
NB_PARSER_STATES
};
struct parser
{
FILE *file; /* pointer to a registry file */
WCHAR two_wchars[2]; /* first two characters from the encoding check */
BOOL is_unicode; /* parsing Unicode or ASCII data */
short int reg_version; /* registry file version */
HKEY hkey; /* current registry key */
WCHAR *key_name; /* current key name */
WCHAR *value_name; /* value name */
DWORD parse_type; /* generic data type for parsing */
DWORD data_type; /* data type */
void *data; /* value data */
DWORD data_size; /* size of the data (in bytes) */
BOOL backslash; /* TRUE if the current line contains a backslash */
enum parser_state state; /* current parser state */
};
typedef WCHAR *(*parser_state_func)(struct parser *parser, WCHAR *pos);
/* parser state machine functions */
static WCHAR *header_state(struct parser *parser, WCHAR *pos);
static WCHAR *parse_win31_line_state(struct parser *parser, WCHAR *pos);
static WCHAR *line_start_state(struct parser *parser, WCHAR *pos);
static WCHAR *key_name_state(struct parser *parser, WCHAR *pos);
static WCHAR *delete_key_state(struct parser *parser, WCHAR *pos);
static WCHAR *default_value_name_state(struct parser *parser, WCHAR *pos);
static WCHAR *quoted_value_name_state(struct parser *parser, WCHAR *pos);
static WCHAR *data_start_state(struct parser *parser, WCHAR *pos);
static WCHAR *delete_value_state(struct parser *parser, WCHAR *pos);
static WCHAR *data_type_state(struct parser *parser, WCHAR *pos);
static WCHAR *string_data_state(struct parser *parser, WCHAR *pos);
static WCHAR *dword_data_state(struct parser *parser, WCHAR *pos);
static WCHAR *hex_data_state(struct parser *parser, WCHAR *pos);
static WCHAR *eol_backslash_state(struct parser *parser, WCHAR *pos);
static WCHAR *hex_multiline_state(struct parser *parser, WCHAR *pos);
static WCHAR *unknown_data_state(struct parser *parser, WCHAR *pos);
static WCHAR *set_value_state(struct parser *parser, WCHAR *pos);
static const parser_state_func parser_funcs[NB_PARSER_STATES] =
{
header_state, /* HEADER */
parse_win31_line_state, /* PARSE_WIN31_LINE */
line_start_state, /* LINE_START */
key_name_state, /* KEY_NAME */
delete_key_state, /* DELETE_KEY */
default_value_name_state, /* DEFAULT_VALUE_NAME */
quoted_value_name_state, /* QUOTED_VALUE_NAME */
data_start_state, /* DATA_START */
delete_value_state, /* DELETE_VALUE */
data_type_state, /* DATA_TYPE */
string_data_state, /* STRING_DATA */
dword_data_state, /* DWORD_DATA */
hex_data_state, /* HEX_DATA */
eol_backslash_state, /* EOL_BACKSLASH */
hex_multiline_state, /* HEX_MULTILINE */
unknown_data_state, /* UNKNOWN_DATA */
set_value_state, /* SET_VALUE */
};
/* set the new parser state and return the previous one */
static inline enum parser_state set_state(struct parser *parser, enum parser_state state)
{
enum parser_state ret = parser->state;
parser->state = state;
return ret;
}
/******************************************************************************
* Converts a hex representation of a DWORD into a DWORD.
*/
static BOOL convert_hex_to_dword(WCHAR *str, DWORD *dw)
{
WCHAR *p, *end;
int count = 0;
while (*str == ' ' || *str == '\t') str++;
if (!*str) goto error;
p = str;
while (iswxdigit(*p))
{
count++;
p++;
}
if (count > 8) goto error;
end = p;
while (*p == ' ' || *p == '\t') p++;
if (*p && *p != ';') goto error;
*end = 0;
*dw = wcstoul(str, &end, 16);
return TRUE;
error:
return FALSE;
}
/******************************************************************************
* Converts comma-separated hex data into a binary string and modifies
* the input parameter to skip the concatenating backslash, if found.
*
* Returns TRUE or FALSE to indicate whether parsing was successful.
*/
static BOOL convert_hex_csv_to_hex(struct parser *parser, WCHAR **str)
{
size_t size;
BYTE *d;
WCHAR *s;
parser->backslash = FALSE;
/* The worst case is 1 digit + 1 comma per byte */
size = ((lstrlenW(*str) + 1) / 2) + parser->data_size;
parser->data = realloc(parser->data, size);
s = *str;
d = (BYTE *)parser->data + parser->data_size;
while (*s)
{
WCHAR *end;
unsigned long wc;
wc = wcstoul(s, &end, 16);
if (wc > 0xff) return FALSE;
if (s == end && wc == 0)
{
while (*end == ' ' || *end == '\t') end++;
if (*end == '\\')
{
parser->backslash = TRUE;
*str = end + 1;
return TRUE;
}
else if (*end == ';')
return TRUE;
return FALSE;
}
*d++ = wc;
parser->data_size++;
if (*end && *end != ',')
{
while (*end == ' ' || *end == '\t') end++;
if (*end && *end != ';') return FALSE;
return TRUE;
}
if (*end) end++;
s = end;
}
return TRUE;
}
/******************************************************************************
* Parses the data type of the registry value being imported and modifies
* the input parameter to skip the string representation of the data type.
*
* Returns TRUE or FALSE to indicate whether a data type was found.
*/
static BOOL parse_data_type(struct parser *parser, WCHAR **line)
{
struct data_type { const WCHAR *tag; int len; int type; int parse_type; };
static const struct data_type data_types[] = {
/* tag len type parse type */
{ L"\"", 1, REG_SZ, REG_SZ },
{ L"hex:", 4, REG_BINARY, REG_BINARY },
{ L"dword:", 6, REG_DWORD, REG_DWORD },
{ L"hex(", 4, -1, REG_BINARY }, /* REG_NONE, REG_EXPAND_SZ, REG_MULTI_SZ */
{ NULL, 0, 0, 0 }
};
const struct data_type *ptr;
for (ptr = data_types; ptr->tag; ptr++)
{
if (wcsncmp(ptr->tag, *line, ptr->len))
continue;
parser->parse_type = ptr->parse_type;
parser->data_type = ptr->parse_type;
*line += ptr->len;
if (ptr->type == -1)
{
WCHAR *end;
DWORD val;
if (!**line || towlower((*line)[1]) == 'x')
return FALSE;
/* "hex(xx):" is special */
val = wcstoul(*line, &end, 16);
if (*end != ')' || *(end + 1) != ':' || (val == ~0u && errno == ERANGE))
return FALSE;
parser->data_type = val;
*line = end + 2;
}
return TRUE;
}
return FALSE;
}
/******************************************************************************
* Replaces escape sequences with their character equivalents and
* null-terminates the string on the first non-escaped double quote.
*
* Assigns a pointer to the remaining unparsed data in the line.
* Returns TRUE or FALSE to indicate whether a closing double quote was found.
*/
static BOOL REGPROC_unescape_string(WCHAR *str, WCHAR **unparsed)
{
int str_idx = 0; /* current character under analysis */
int val_idx = 0; /* the last character of the unescaped string */
int len = lstrlenW(str);
BOOL ret;
for (str_idx = 0; str_idx < len; str_idx++, val_idx++) {
if (str[str_idx] == '\\') {
str_idx++;
switch (str[str_idx]) {
case 'n':
str[val_idx] = '\n';
break;
case 'r':
str[val_idx] = '\r';
break;
case '0':
return FALSE;
case '\\':
case '"':
str[val_idx] = str[str_idx];
break;
default:
if (!str[str_idx]) return FALSE;
output_message(STRING_ESCAPE_SEQUENCE, str[str_idx]);
str[val_idx] = str[str_idx];
break;
}
} else if (str[str_idx] == '"') {
break;
} else {
str[val_idx] = str[str_idx];
}
}
ret = (str[str_idx] == '"');
*unparsed = str + str_idx + 1;
str[val_idx] = '\0';
return ret;
}
static HKEY parse_key_name(WCHAR *key_name, WCHAR **key_path)
{
unsigned int i;
if (!key_name) return 0;
*key_path = wcschr(key_name, '\\');
if (*key_path) (*key_path)++;
for (i = 0; i < ARRAY_SIZE(reg_class_keys); i++)
{
int len = lstrlenW(reg_class_namesW[i]);
if (!wcsnicmp(key_name, reg_class_namesW[i], len) &&
(key_name[len] == 0 || key_name[len] == '\\'))
{
return reg_class_keys[i];
}
}
return 0;
}
static void close_key(struct parser *parser)
{
if (parser->hkey)
{
free(parser->key_name);
parser->key_name = NULL;
RegCloseKey(parser->hkey);
parser->hkey = NULL;
}
}
/******************************************************************************
* Opens the registry key given by the input path.
* This key must be closed by calling close_key().
*/
static LONG open_key(struct parser *parser, WCHAR *path)
{
HKEY key_class;
WCHAR *key_path;
LONG res;
close_key(parser);
/* Get the registry class */
if (!path || !(key_class = parse_key_name(path, &key_path)))
return ERROR_INVALID_PARAMETER;
res = RegCreateKeyExW(key_class, key_path, 0, NULL, REG_OPTION_NON_VOLATILE,
KEY_ALL_ACCESS, NULL, &parser->hkey, NULL);
if (res == ERROR_SUCCESS)
{
parser->key_name = malloc((lstrlenW(path) + 1) * sizeof(WCHAR));
lstrcpyW(parser->key_name, path);
}
else
parser->hkey = NULL;
return res;
}
static void free_parser_data(struct parser *parser)
{
if (parser->parse_type == REG_DWORD || parser->parse_type == REG_BINARY)
free(parser->data);
parser->data = NULL;
parser->data_size = 0;
}
static void prepare_hex_string_data(struct parser *parser)
{
if (parser->data_type == REG_EXPAND_SZ || parser->data_type == REG_MULTI_SZ ||
parser->data_type == REG_SZ)
{
if (parser->is_unicode)
{
WCHAR *data = parser->data;
DWORD len = parser->data_size / sizeof(WCHAR);
if (data[len - 1] != 0)
{
data[len] = 0;
parser->data_size += sizeof(WCHAR);
}
}
else
{
BYTE *data = parser->data;
if (data[parser->data_size - 1] != 0)
{
data[parser->data_size] = 0;
parser->data_size++;
}
parser->data = GetWideStringN(parser->data, parser->data_size, &parser->data_size);
parser->data_size *= sizeof(WCHAR);
free(data);
}
}
}
enum reg_versions {
REG_VERSION_31,
REG_VERSION_40,
REG_VERSION_50,
REG_VERSION_FUZZY,
REG_VERSION_INVALID
};
static enum reg_versions parse_file_header(const WCHAR *s)
{
static const WCHAR header_31[] = L"REGEDIT";
while (*s == ' ' || *s == '\t') s++;
if (!lstrcmpW(s, header_31))
return REG_VERSION_31;
if (!lstrcmpW(s, L"REGEDIT4"))
return REG_VERSION_40;
if (!lstrcmpW(s, L"Windows Registry Editor Version 5.00"))
return REG_VERSION_50;
/* The Windows version accepts registry file headers beginning with "REGEDIT" and ending
* with other characters, as long as "REGEDIT" appears at the start of the line. For example,
* "REGEDIT 4", "REGEDIT9" and "REGEDIT4FOO" are all treated as valid file headers.
* In all such cases, however, the contents of the registry file are not imported.
*/
if (!wcsncmp(s, header_31, 7)) /* "REGEDIT" without NUL */
return REG_VERSION_FUZZY;
return REG_VERSION_INVALID;
}
/* handler for parser HEADER state */
static WCHAR *header_state(struct parser *parser, WCHAR *pos)
{
WCHAR *line, *header;
if (!(line = get_line(parser->file)))
return NULL;
if (!parser->is_unicode)
{
header = malloc((lstrlenW(line) + 3) * sizeof(WCHAR));
header[0] = parser->two_wchars[0];
header[1] = parser->two_wchars[1];
lstrcpyW(header + 2, line);
parser->reg_version = parse_file_header(header);
free(header);
}
else parser->reg_version = parse_file_header(line);
switch (parser->reg_version)
{
case REG_VERSION_31:
set_state(parser, PARSE_WIN31_LINE);
break;
case REG_VERSION_40:
case REG_VERSION_50:
set_state(parser, LINE_START);
break;
default:
get_line(NULL); /* Reset static variables */
return NULL;
}
return line;
}
/* handler for parser PARSE_WIN31_LINE state */
static WCHAR *parse_win31_line_state(struct parser *parser, WCHAR *pos)
{
WCHAR *line, *value;
static WCHAR hkcr[] = L"HKEY_CLASSES_ROOT";
unsigned int key_end = 0;
if (!(line = get_line(parser->file)))
return NULL;
if (wcsncmp(line, hkcr, lstrlenW(hkcr)))
return line;
/* get key name */
while (line[key_end] && !iswspace(line[key_end])) key_end++;
value = line + key_end;
while (*value == ' ' || *value == '\t') value++;
if (*value == '=') value++;
if (*value == ' ') value++; /* at most one space is skipped */
line[key_end] = 0;
if (open_key(parser, line) != ERROR_SUCCESS)
{
output_message(STRING_OPEN_KEY_FAILED, line);
return line;
}
parser->value_name = NULL;
parser->data_type = REG_SZ;
parser->data = value;
parser->data_size = (lstrlenW(value) + 1) * sizeof(WCHAR);
set_state(parser, SET_VALUE);
return value;
}
/* handler for parser LINE_START state */
static WCHAR *line_start_state(struct parser *parser, WCHAR *pos)
{
WCHAR *line, *p;
if (!(line = get_line(parser->file)))
return NULL;
for (p = line; *p; p++)
{
switch (*p)
{
case '[':
set_state(parser, KEY_NAME);
return p + 1;
case '@':
set_state(parser, DEFAULT_VALUE_NAME);
return p;
case '"':
set_state(parser, QUOTED_VALUE_NAME);
return p + 1;
case ' ':
case '\t':
break;
default:
return p;
}
}
return p;
}
/* handler for parser KEY_NAME state */
static WCHAR *key_name_state(struct parser *parser, WCHAR *pos)
{
WCHAR *p = pos, *key_end;
if (*p == ' ' || *p == '\t' || !(key_end = wcsrchr(p, ']')))
goto done;
*key_end = 0;
if (*p == '-')
{
set_state(parser, DELETE_KEY);
return p + 1;
}
else if (open_key(parser, p) != ERROR_SUCCESS)
output_message(STRING_OPEN_KEY_FAILED, p);
done:
set_state(parser, LINE_START);
return p;
}
/* handler for parser DELETE_KEY state */
static WCHAR *delete_key_state(struct parser *parser, WCHAR *pos)
{
WCHAR *p = pos;
close_key(parser);
if (*p == 'H' || *p == 'h')
delete_registry_key(p);
set_state(parser, LINE_START);
return p;
}
/* handler for parser DEFAULT_VALUE_NAME state */
static WCHAR *default_value_name_state(struct parser *parser, WCHAR *pos)
{
free(parser->value_name);
parser->value_name = NULL;
set_state(parser, DATA_START);
return pos + 1;
}
/* handler for parser QUOTED_VALUE_NAME state */
static WCHAR *quoted_value_name_state(struct parser *parser, WCHAR *pos)
{
WCHAR *val_name = pos, *p;
free(parser->value_name);
parser->value_name = NULL;
if (!REGPROC_unescape_string(val_name, &p))
goto invalid;
/* copy the value name in case we need to parse multiple lines and the buffer is overwritten */
parser->value_name = malloc((lstrlenW(val_name) + 1) * sizeof(WCHAR));
lstrcpyW(parser->value_name, val_name);
set_state(parser, DATA_START);
return p;
invalid:
set_state(parser, LINE_START);
return val_name;
}
/* handler for parser DATA_START state */
static WCHAR *data_start_state(struct parser *parser, WCHAR *pos)
{
WCHAR *p = pos;
unsigned int len;
while (*p == ' ' || *p == '\t') p++;
if (*p != '=') goto done;
p++;
while (*p == ' ' || *p == '\t') p++;
/* trim trailing whitespace */
len = lstrlenW(p);
while (len > 0 && (p[len - 1] == ' ' || p[len - 1] == '\t')) len--;
p[len] = 0;
if (*p == '-')
set_state(parser, DELETE_VALUE);
else
set_state(parser, DATA_TYPE);
return p;
done:
set_state(parser, LINE_START);
return p;
}
/* handler for parser DELETE_VALUE state */
static WCHAR *delete_value_state(struct parser *parser, WCHAR *pos)
{
WCHAR *p = pos + 1;
while (*p == ' ' || *p == '\t') p++;
if (*p && *p != ';') goto done;
RegDeleteValueW(parser->hkey, parser->value_name);
done:
set_state(parser, LINE_START);
return p;
}
/* handler for parser DATA_TYPE state */
static WCHAR *data_type_state(struct parser *parser, WCHAR *pos)
{
WCHAR *line = pos;
if (!parse_data_type(parser, &line))
{
set_state(parser, LINE_START);
return line;
}
switch (parser->parse_type)
{
case REG_SZ:
set_state(parser, STRING_DATA);
break;
case REG_DWORD:
set_state(parser, DWORD_DATA);
break;
case REG_BINARY: /* all hex data types, including undefined */
set_state(parser, HEX_DATA);
break;
default:
set_state(parser, UNKNOWN_DATA);
}
return line;
}
/* handler for parser STRING_DATA state */
static WCHAR *string_data_state(struct parser *parser, WCHAR *pos)
{
WCHAR *line;
parser->data = pos;
if (!REGPROC_unescape_string(parser->data, &line))
goto invalid;
while (*line == ' ' || *line == '\t') line++;
if (*line && *line != ';') goto invalid;
parser->data_size = (lstrlenW(parser->data) + 1) * sizeof(WCHAR);
set_state(parser, SET_VALUE);
return line;
invalid:
free_parser_data(parser);
set_state(parser, LINE_START);
return line;
}
/* handler for parser DWORD_DATA state */
static WCHAR *dword_data_state(struct parser *parser, WCHAR *pos)
{
WCHAR *line = pos;
parser->data = malloc(sizeof(DWORD));
if (!convert_hex_to_dword(line, parser->data))
goto invalid;
parser->data_size = sizeof(DWORD);
set_state(parser, SET_VALUE);
return line;
invalid:
free_parser_data(parser);
set_state(parser, LINE_START);
return line;
}
/* handler for parser HEX_DATA state */
static WCHAR *hex_data_state(struct parser *parser, WCHAR *pos)
{
WCHAR *line = pos;
if (!*line)
goto set_value;
if (!convert_hex_csv_to_hex(parser, &line))
goto invalid;
if (parser->backslash)
{
set_state(parser, EOL_BACKSLASH);
return line;
}
prepare_hex_string_data(parser);
set_value:
set_state(parser, SET_VALUE);
return line;
invalid:
free_parser_data(parser);
set_state(parser, LINE_START);
return line;
}
/* handler for parser EOL_BACKSLASH state */
static WCHAR *eol_backslash_state(struct parser *parser, WCHAR *pos)
{
WCHAR *p = pos;
while (*p == ' ' || *p == '\t') p++;
if (*p && *p != ';') goto invalid;
set_state(parser, HEX_MULTILINE);
return pos;
invalid:
free_parser_data(parser);
set_state(parser, LINE_START);
return p;
}
/* handler for parser HEX_MULTILINE state */
static WCHAR *hex_multiline_state(struct parser *parser, WCHAR *pos)
{
WCHAR *line;
if (!(line = get_line(parser->file)))
{
prepare_hex_string_data(parser);
set_state(parser, SET_VALUE);
return pos;
}
while (*line == ' ' || *line == '\t') line++;
if (!*line || *line == ';') return line;
if (!iswxdigit(*line)) goto invalid;
set_state(parser, HEX_DATA);
return line;
invalid:
free_parser_data(parser);
set_state(parser, LINE_START);
return line;
}
/* handler for parser UNKNOWN_DATA state */
static WCHAR *unknown_data_state(struct parser *parser, WCHAR *pos)
{
output_message(STRING_UNKNOWN_DATA_FORMAT, parser->data_type);
set_state(parser, LINE_START);
return pos;
}
/* handler for parser SET_VALUE state */
static WCHAR *set_value_state(struct parser *parser, WCHAR *pos)
{
RegSetValueExW(parser->hkey, parser->value_name, 0, parser->data_type,
parser->data, parser->data_size);
free_parser_data(parser);
if (parser->reg_version == REG_VERSION_31)
set_state(parser, PARSE_WIN31_LINE);
else
set_state(parser, LINE_START);
return pos;
}
static WCHAR *get_lineA(FILE *fp)
{
static WCHAR *lineW;
static size_t size;
static char *buf, *next;
char *line;
free(lineW);
if (!fp) goto cleanup;
if (!size)
{
size = REG_VAL_BUF_SIZE;
buf = malloc(size);
*buf = 0;
next = buf;
}
line = next;
while (next)
{
char *p = strpbrk(line, "\r\n");
if (!p)
{
size_t len, count;
len = strlen(next);
memmove(buf, next, len + 1);
if (size - len < 3)
{
size *= 2;
buf = realloc(buf, size);
}
if (!(count = fread(buf + len, 1, size - len - 1, fp)))
{
next = NULL;
lineW = GetWideString(buf);
return lineW;
}
buf[len + count] = 0;
next = buf;
line = buf;
continue;
}
next = p + 1;
if (*p == '\r' && *(p + 1) == '\n') next++;
*p = 0;
lineW = GetWideString(line);
return lineW;
}
cleanup:
lineW = NULL;
if (size) free(buf);
size = 0;
return NULL;
}
static WCHAR *get_lineW(FILE *fp)
{
static size_t size;
static WCHAR *buf, *next;
WCHAR *line;
if (!fp) goto cleanup;
if (!size)
{
size = REG_VAL_BUF_SIZE;
buf = malloc(size * sizeof(WCHAR));
*buf = 0;
next = buf;
}
line = next;
while (next)
{
WCHAR *p = wcspbrk(line, L"\r\n");
if (!p)
{
size_t len, count;
len = lstrlenW(next);
memmove(buf, next, (len + 1) * sizeof(WCHAR));
if (size - len < 3)
{
size *= 2;
buf = realloc(buf, size * sizeof(WCHAR));
}
if (!(count = fread(buf + len, sizeof(WCHAR), size - len - 1, fp)))
{
next = NULL;
return buf;
}
buf[len + count] = 0;
next = buf;
line = buf;
continue;
}
next = p + 1;
if (*p == '\r' && *(p + 1) == '\n') next++;
*p = 0;
return line;
}
cleanup:
if (size) free(buf);
size = 0;
return NULL;
}
/******************************************************************************
* Reads contents of the specified file into the registry.
*/
BOOL import_registry_file(FILE *reg_file)
{
BYTE s[2];
struct parser parser;
WCHAR *pos;
if (!reg_file || (fread(s, 2, 1, reg_file) != 1))
return FALSE;
parser.is_unicode = (s[0] == 0xff && s[1] == 0xfe);
get_line = parser.is_unicode ? get_lineW : get_lineA;
parser.file = reg_file;
parser.two_wchars[0] = s[0];
parser.two_wchars[1] = s[1];
parser.reg_version = -1;
parser.hkey = NULL;
parser.key_name = NULL;
parser.value_name = NULL;
parser.parse_type = 0;
parser.data_type = 0;
parser.data = NULL;
parser.data_size = 0;
parser.backslash = FALSE;
parser.state = HEADER;
pos = parser.two_wchars;
/* parser main loop */
while (pos)
pos = (parser_funcs[parser.state])(&parser, pos);
if (parser.reg_version == REG_VERSION_FUZZY || parser.reg_version == REG_VERSION_INVALID)
return parser.reg_version == REG_VERSION_FUZZY;
free(parser.value_name);
close_key(&parser);
return TRUE;
}
/******************************************************************************
* Removes the registry key with all subkeys. Parses full key name.
*
* Parameters:
* reg_key_name - full name of registry branch to delete. Ignored if is NULL,
* empty, points to register key class, does not exist.
*/
void delete_registry_key(WCHAR *reg_key_name)
{
WCHAR *key_name = NULL;
HKEY key_class;
if (!reg_key_name || !reg_key_name[0])
return;
if (!(key_class = parse_key_name(reg_key_name, &key_name)))
{
if (key_name) *(key_name - 1) = 0;
error_exit(STRING_INVALID_SYSTEM_KEY, reg_key_name);
}
if (!key_name || !*key_name)
error_exit(STRING_DELETE_FAILED, reg_key_name);
RegDeleteTreeW(key_class, key_name);
}
static void REGPROC_write_line(FILE *fp, const WCHAR *str, BOOL unicode)
{
if (unicode)
fwrite(str, sizeof(WCHAR), lstrlenW(str), fp);
else
{
char *strA = GetMultiByteString(str);
fputs(strA, fp);
free(strA);
}
}
static WCHAR *REGPROC_escape_string(WCHAR *str, size_t str_len, size_t *line_len)
{
size_t i, escape_count, pos;
WCHAR *buf;
for (i = 0, escape_count = 0; i < str_len; i++)
{
WCHAR c = str[i];
if (!c) break;
if (c == '\r' || c == '\n' || c == '\\' || c == '"')
escape_count++;
}
buf = malloc((str_len + escape_count + 1) * sizeof(WCHAR));
for (i = 0, pos = 0; i < str_len; i++, pos++)
{
WCHAR c = str[i];
if (!c) break;
switch (c)
{
case '\r':
buf[pos++] = '\\';
buf[pos] = 'r';
break;
case '\n':
buf[pos++] = '\\';
buf[pos] = 'n';
break;
case '\\':
buf[pos++] = '\\';
buf[pos] = '\\';
break;
case '"':
buf[pos++] = '\\';
buf[pos] = '"';
break;
default:
buf[pos] = c;
}
}
buf[pos] = 0;
*line_len = pos;
return buf;
}
static size_t export_value_name(FILE *fp, WCHAR *name, size_t len, BOOL unicode)
{
static const WCHAR default_name[] = L"@=";
size_t line_len;
if (name && *name)
{
WCHAR *str = REGPROC_escape_string(name, len, &line_len);
WCHAR *buf = malloc((line_len + 4) * sizeof(WCHAR));
line_len = swprintf(buf, line_len + 4, L"\"%s\"=", str);
REGPROC_write_line(fp, buf, unicode);
free(buf);
free(str);
}
else
{
line_len = lstrlenW(default_name);
REGPROC_write_line(fp, default_name, unicode);
}
return line_len;
}
static void export_string_data(WCHAR **buf, WCHAR *data, size_t size)
{
size_t len = 0, line_len;
WCHAR *str;
if (size)
len = size / sizeof(WCHAR) - 1;
str = REGPROC_escape_string(data, len, &line_len);
*buf = malloc((line_len + 3) * sizeof(WCHAR));
swprintf(*buf, line_len + 3, L"\"%s\"", str);
free(str);
}
static void export_dword_data(WCHAR **buf, DWORD *data)
{
*buf = malloc(15 * sizeof(WCHAR));
swprintf(*buf, 15, L"dword:%08x", *data);
}
static size_t export_hex_data_type(FILE *fp, DWORD type, BOOL unicode)
{
static const WCHAR hex[] = L"hex:";
size_t line_len;
if (type == REG_BINARY)
{
line_len = lstrlenW(hex);
REGPROC_write_line(fp, hex, unicode);
}
else
{
WCHAR *buf = malloc(15 * sizeof(WCHAR));
line_len = swprintf(buf, 15, L"hex(%x):", type);
REGPROC_write_line(fp, buf, unicode);
free(buf);
}
return line_len;
}
#define MAX_HEX_CHARS 77
static void export_hex_data(FILE *fp, WCHAR **buf, DWORD type, DWORD line_len,
void *data, DWORD size, BOOL unicode)
{
size_t num_commas, i, pos;
line_len += export_hex_data_type(fp, type, unicode);
if (!size) return;
if (!unicode && (type == REG_EXPAND_SZ || type == REG_MULTI_SZ))
data = GetMultiByteStringN(data, size / sizeof(WCHAR), &size);
num_commas = size - 1;
*buf = malloc(size * 3 * sizeof(WCHAR));
for (i = 0, pos = 0; i < size; i++)
{
pos += swprintf(*buf + pos, 3, L"%02x", ((BYTE *)data)[i]);
if (i == num_commas) break;
(*buf)[pos++] = ',';
(*buf)[pos] = 0;
line_len += 3;
if (line_len >= MAX_HEX_CHARS)
{
REGPROC_write_line(fp, *buf, unicode);
REGPROC_write_line(fp, L"\\\r\n ", unicode);
line_len = 2;
pos = 0;
}
}
}
static void export_newline(FILE *fp, BOOL unicode)
{
REGPROC_write_line(fp, L"\r\n", unicode);
}
static void export_data(FILE *fp, WCHAR *value_name, DWORD value_len, DWORD type,
void *data, size_t size, BOOL unicode)
{
WCHAR *buf = NULL;
size_t line_len = export_value_name(fp, value_name, value_len, unicode);
switch (type)
{
case REG_SZ:
export_string_data(&buf, data, size);
break;
case REG_DWORD:
if (size)
{
export_dword_data(&buf, data);
break;
}
/* fall through */
case REG_NONE:
case REG_EXPAND_SZ:
case REG_BINARY:
case REG_MULTI_SZ:
default:
export_hex_data(fp, &buf, type, line_len, data, size, unicode);
break;
}
if (size || type == REG_SZ)
{
REGPROC_write_line(fp, buf, unicode);
free(buf);
}
export_newline(fp, unicode);
}
static WCHAR *build_subkey_path(WCHAR *path, DWORD path_len, WCHAR *subkey_name, DWORD subkey_len)
{
WCHAR *subkey_path;
subkey_path = malloc((path_len + subkey_len + 2) * sizeof(WCHAR));
swprintf(subkey_path, path_len + subkey_len + 2, L"%s\\%s", path, subkey_name);
return subkey_path;
}
static void export_key_name(FILE *fp, WCHAR *name, BOOL unicode)
{
WCHAR *buf;
buf = malloc((lstrlenW(name) + 7) * sizeof(WCHAR));
swprintf(buf, lstrlenW(name) + 7, L"\r\n[%s]\r\n", name);
REGPROC_write_line(fp, buf, unicode);
free(buf);
}
#define MAX_SUBKEY_LEN 257
static int export_registry_data(FILE *fp, HKEY key, WCHAR *path, BOOL unicode)
{
LONG rc;
DWORD max_value_len = 256, value_len;
DWORD max_data_bytes = 2048, data_size;
DWORD subkey_len;
DWORD i, type, path_len;
WCHAR *value_name, *subkey_name, *subkey_path;
BYTE *data;
HKEY subkey;
export_key_name(fp, path, unicode);
value_name = malloc(max_value_len * sizeof(WCHAR));
data = malloc(max_data_bytes);
i = 0;
for (;;)
{
value_len = max_value_len;
data_size = max_data_bytes;
rc = RegEnumValueW(key, i, value_name, &value_len, NULL, &type, data, &data_size);
if (rc == ERROR_SUCCESS)
{
export_data(fp, value_name, value_len, type, data, data_size, unicode);
i++;
}
else if (rc == ERROR_MORE_DATA)
{
if (data_size > max_data_bytes)
{
max_data_bytes = data_size;
data = realloc(data, max_data_bytes);
}
else
{
max_value_len *= 2;
value_name = realloc(value_name, max_value_len * sizeof(WCHAR));
}
}
else break;
}
free(data);
free(value_name);
subkey_name = malloc(MAX_SUBKEY_LEN * sizeof(WCHAR));
path_len = lstrlenW(path);
i = 0;
for (;;)
{
subkey_len = MAX_SUBKEY_LEN;
rc = RegEnumKeyExW(key, i, subkey_name, &subkey_len, NULL, NULL, NULL, NULL);
if (rc == ERROR_SUCCESS)
{
subkey_path = build_subkey_path(path, path_len, subkey_name, subkey_len);
if (!RegOpenKeyExW(key, subkey_name, 0, KEY_READ, &subkey))
{
export_registry_data(fp, subkey, subkey_path, unicode);
RegCloseKey(subkey);
}
free(subkey_path);
i++;
}
else break;
}
free(subkey_name);
return 0;
}
static FILE *REGPROC_open_export_file(WCHAR *file_name, BOOL unicode)
{
FILE *file;
if (!lstrcmpW(file_name, L"-"))
{
file = stdout;
_setmode(_fileno(file), _O_BINARY);
}
else
{
file = _wfopen(file_name, L"wb");
if (!file)
{
_wperror(L"regedit");
error_exit(STRING_CANNOT_OPEN_FILE, file_name);
}
}
if (unicode)
{
static const BYTE bom[] = {0xff,0xfe};
static const WCHAR header[] = L"Windows Registry Editor Version 5.00\r\n";
fwrite(bom, sizeof(BYTE), ARRAY_SIZE(bom), file);
fwrite(header, sizeof(WCHAR), lstrlenW(header), file);
}
else
fputs("REGEDIT4\r\n", file);
return file;
}
static HKEY open_export_key(HKEY key_class, WCHAR *subkey, WCHAR *path)
{
HKEY key;
if (!RegOpenKeyExW(key_class, subkey, 0, KEY_READ, &key))
return key;
output_message(STRING_OPEN_KEY_FAILED, path);
return NULL;
}
static BOOL export_key(WCHAR *file_name, WCHAR *path, BOOL unicode)
{
HKEY key_class, key;
WCHAR *subkey;
FILE *fp;
BOOL ret;
if (!(key_class = parse_key_name(path, &subkey)))
{
if (subkey) *(subkey - 1) = 0;
output_message(STRING_INVALID_SYSTEM_KEY, path);
return FALSE;
}
if (!(key = open_export_key(key_class, subkey, path)))
return FALSE;
fp = REGPROC_open_export_file(file_name, unicode);
ret = export_registry_data(fp, key, path, unicode);
export_newline(fp, unicode);
fclose(fp);
RegCloseKey(key);
return ret;
}
static BOOL export_all(WCHAR *file_name, WCHAR *path, BOOL unicode)
{
FILE *fp;
int i;
HKEY classes[] = {HKEY_LOCAL_MACHINE, HKEY_USERS}, key;
WCHAR *class_name;
fp = REGPROC_open_export_file(file_name, unicode);
for (i = 0; i < ARRAY_SIZE(classes); i++)
{
if (!(key = open_export_key(classes[i], NULL, path)))
{
fclose(fp);
return FALSE;
}
class_name = malloc((lstrlenW(reg_class_namesW[i]) + 1) * sizeof(WCHAR));
lstrcpyW(class_name, reg_class_namesW[i]);
export_registry_data(fp, classes[i], class_name, unicode);
free(class_name);
RegCloseKey(key);
}
export_newline(fp, unicode);
fclose(fp);
return TRUE;
}
BOOL export_registry_key(WCHAR *file_name, WCHAR *path, DWORD format)
{
BOOL unicode = (format == REG_FORMAT_5);
if (path && *path)
return export_key(file_name, path, unicode);
else
return export_all(file_name, path, unicode);
}
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