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wine/server/registry.c
Sebastian Lackner 808619b72d server: Allow to create win32 prefix when directory already exists. 
Signed-off-by: Sebastian Lackner <sebastian@fds-team.de>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2016-09-22 12:46:01 +09:00

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/*
* Server-side registry management
*
* Copyright (C) 1999 Alexandre Julliard
*
* 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
*/
/* To do:
* - symbolic links
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "object.h"
#include "file.h"
#include "handle.h"
#include "request.h"
#include "process.h"
#include "unicode.h"
#include "security.h"
#include "winternl.h"
#include "wine/library.h"
struct notify
{
struct list entry; /* entry in list of notifications */
struct event *event; /* event to set when changing this key */
int subtree; /* true if subtree notification */
unsigned int filter; /* which events to notify on */
obj_handle_t hkey; /* hkey associated with this notification */
struct process *process; /* process in which the hkey is valid */
};
/* a registry key */
struct key
{
struct object obj; /* object header */
WCHAR *name; /* key name */
WCHAR *class; /* key class */
unsigned short namelen; /* length of key name */
unsigned short classlen; /* length of class name */
struct key *parent; /* parent key */
int last_subkey; /* last in use subkey */
int nb_subkeys; /* count of allocated subkeys */
struct key **subkeys; /* subkeys array */
int last_value; /* last in use value */
int nb_values; /* count of allocated values in array */
struct key_value *values; /* values array */
unsigned int flags; /* flags */
timeout_t modif; /* last modification time */
struct list notify_list; /* list of notifications */
};
/* key flags */
#define KEY_VOLATILE 0x0001 /* key is volatile (not saved to disk) */
#define KEY_DELETED 0x0002 /* key has been deleted */
#define KEY_DIRTY 0x0004 /* key has been modified */
#define KEY_SYMLINK 0x0008 /* key is a symbolic link */
#define KEY_WOW64 0x0010 /* key contains a Wow6432Node subkey */
#define KEY_WOWSHARE 0x0020 /* key is a Wow64 shared key (used for Software\Classes) */
/* a key value */
struct key_value
{
WCHAR *name; /* value name */
unsigned short namelen; /* length of value name */
unsigned int type; /* value type */
data_size_t len; /* value data length in bytes */
void *data; /* pointer to value data */
};
#define MIN_SUBKEYS 8 /* min. number of allocated subkeys per key */
#define MIN_VALUES 8 /* min. number of allocated values per key */
#define MAX_NAME_LEN 256 /* max. length of a key name */
#define MAX_VALUE_LEN 16383 /* max. length of a value name */
/* the root of the registry tree */
static struct key *root_key;
static const timeout_t ticks_1601_to_1970 = (timeout_t)86400 * (369 * 365 + 89) * TICKS_PER_SEC;
static const timeout_t save_period = 30 * -TICKS_PER_SEC; /* delay between periodic saves */
static struct timeout_user *save_timeout_user; /* saving timer */
static enum prefix_type { PREFIX_UNKNOWN, PREFIX_32BIT, PREFIX_64BIT } prefix_type;
static const WCHAR root_name[] = { '\\','R','e','g','i','s','t','r','y','\\' };
static const WCHAR wow6432node[] = {'W','o','w','6','4','3','2','N','o','d','e'};
static const WCHAR symlink_value[] = {'S','y','m','b','o','l','i','c','L','i','n','k','V','a','l','u','e'};
static const struct unicode_str symlink_str = { symlink_value, sizeof(symlink_value) };
static void set_periodic_save_timer(void);
static struct key_value *find_value( const struct key *key, const struct unicode_str *name, int *index );
/* information about where to save a registry branch */
struct save_branch_info
{
struct key *key;
const char *path;
};
#define MAX_SAVE_BRANCH_INFO 3
static int save_branch_count;
static struct save_branch_info save_branch_info[MAX_SAVE_BRANCH_INFO];
/* information about a file being loaded */
struct file_load_info
{
const char *filename; /* input file name */
FILE *file; /* input file */
char *buffer; /* line buffer */
int len; /* buffer length */
int line; /* current input line */
WCHAR *tmp; /* temp buffer to use while parsing input */
size_t tmplen; /* length of temp buffer */
};
static void key_dump( struct object *obj, int verbose );
static struct object_type *key_get_type( struct object *obj );
static unsigned int key_map_access( struct object *obj, unsigned int access );
static struct security_descriptor *key_get_sd( struct object *obj );
static int key_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
static void key_destroy( struct object *obj );
static const struct object_ops key_ops =
{
sizeof(struct key), /* size */
key_dump, /* dump */
key_get_type, /* get_type */
no_add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
NULL, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
key_map_access, /* map_access */
key_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_link_name, /* link_name */
NULL, /* unlink_name */
no_open_file, /* open_file */
key_close_handle, /* close_handle */
key_destroy /* destroy */
};
static inline int is_wow6432node( const WCHAR *name, unsigned int len )
{
return (len == sizeof(wow6432node) &&
!memicmpW( name, wow6432node, sizeof(wow6432node)/sizeof(WCHAR) ));
}
/*
* The registry text file format v2 used by this code is similar to the one
* used by REGEDIT import/export functionality, with the following differences:
* - strings and key names can contain \x escapes for Unicode
* - key names use escapes too in order to support Unicode
* - the modification time optionally follows the key name
* - REG_EXPAND_SZ and REG_MULTI_SZ are saved as strings instead of hex
*/
/* dump the full path of a key */
static void dump_path( const struct key *key, const struct key *base, FILE *f )
{
if (key->parent && key->parent != base)
{
dump_path( key->parent, base, f );
fprintf( f, "\\\\" );
}
dump_strW( key->name, key->namelen / sizeof(WCHAR), f, "[]" );
}
/* dump a value to a text file */
static void dump_value( const struct key_value *value, FILE *f )
{
unsigned int i, dw;
int count;
if (value->namelen)
{
fputc( '\"', f );
count = 1 + dump_strW( value->name, value->namelen / sizeof(WCHAR), f, "\"\"" );
count += fprintf( f, "\"=" );
}
else count = fprintf( f, "@=" );
switch(value->type)
{
case REG_SZ:
case REG_EXPAND_SZ:
case REG_MULTI_SZ:
/* only output properly terminated strings in string format */
if (value->len < sizeof(WCHAR)) break;
if (value->len % sizeof(WCHAR)) break;
if (((WCHAR *)value->data)[value->len / sizeof(WCHAR) - 1]) break;
if (value->type != REG_SZ) fprintf( f, "str(%x):", value->type );
fputc( '\"', f );
dump_strW( (WCHAR *)value->data, value->len / sizeof(WCHAR), f, "\"\"" );
fprintf( f, "\"\n" );
return;
case REG_DWORD:
if (value->len != sizeof(dw)) break;
memcpy( &dw, value->data, sizeof(dw) );
fprintf( f, "dword:%08x\n", dw );
return;
}
if (value->type == REG_BINARY) count += fprintf( f, "hex:" );
else count += fprintf( f, "hex(%x):", value->type );
for (i = 0; i < value->len; i++)
{
count += fprintf( f, "%02x", *((unsigned char *)value->data + i) );
if (i < value->len-1)
{
fputc( ',', f );
if (++count > 76)
{
fprintf( f, "\\\n " );
count = 2;
}
}
}
fputc( '\n', f );
}
/* save a registry and all its subkeys to a text file */
static void save_subkeys( const struct key *key, const struct key *base, FILE *f )
{
int i;
if (key->flags & KEY_VOLATILE) return;
/* save key if it has either some values or no subkeys, or needs special options */
/* keys with no values but subkeys are saved implicitly by saving the subkeys */
if ((key->last_value >= 0) || (key->last_subkey == -1) || key->class || (key->flags & KEY_SYMLINK))
{
fprintf( f, "\n[" );
if (key != base) dump_path( key, base, f );
fprintf( f, "] %u\n", (unsigned int)((key->modif - ticks_1601_to_1970) / TICKS_PER_SEC) );
fprintf( f, "#time=%x%08x\n", (unsigned int)(key->modif >> 32), (unsigned int)key->modif );
if (key->class)
{
fprintf( f, "#class=\"" );
dump_strW( key->class, key->classlen / sizeof(WCHAR), f, "\"\"" );
fprintf( f, "\"\n" );
}
if (key->flags & KEY_SYMLINK) fputs( "#link\n", f );
for (i = 0; i <= key->last_value; i++) dump_value( &key->values[i], f );
}
for (i = 0; i <= key->last_subkey; i++) save_subkeys( key->subkeys[i], base, f );
}
static void dump_operation( const struct key *key, const struct key_value *value, const char *op )
{
fprintf( stderr, "%s key ", op );
if (key) dump_path( key, NULL, stderr );
else fprintf( stderr, "ERROR" );
if (value)
{
fprintf( stderr, " value ");
dump_value( value, stderr );
}
else fprintf( stderr, "\n" );
}
static void key_dump( struct object *obj, int verbose )
{
struct key *key = (struct key *)obj;
assert( obj->ops == &key_ops );
fprintf( stderr, "Key flags=%x ", key->flags );
dump_path( key, NULL, stderr );
fprintf( stderr, "\n" );
}
static struct object_type *key_get_type( struct object *obj )
{
static const WCHAR name[] = {'K','e','y'};
static const struct unicode_str str = { name, sizeof(name) };
return get_object_type( &str );
}
/* notify waiter and maybe delete the notification */
static void do_notification( struct key *key, struct notify *notify, int del )
{
if (notify->event)
{
set_event( notify->event );
release_object( notify->event );
notify->event = NULL;
}
if (del)
{
list_remove( &notify->entry );
free( notify );
}
}
static inline struct notify *find_notify( struct key *key, struct process *process, obj_handle_t hkey )
{
struct notify *notify;
LIST_FOR_EACH_ENTRY( notify, &key->notify_list, struct notify, entry )
{
if (notify->process == process && notify->hkey == hkey) return notify;
}
return NULL;
}
static unsigned int key_map_access( struct object *obj, unsigned int access )
{
if (access & GENERIC_READ) access |= KEY_READ;
if (access & GENERIC_WRITE) access |= KEY_WRITE;
if (access & GENERIC_EXECUTE) access |= KEY_EXECUTE;
if (access & GENERIC_ALL) access |= KEY_ALL_ACCESS;
/* filter the WOW64 masks, as they aren't real access bits */
return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL |
KEY_WOW64_64KEY | KEY_WOW64_32KEY);
}
static struct security_descriptor *key_get_sd( struct object *obj )
{
static struct security_descriptor *key_default_sd;
if (obj->sd) return obj->sd;
if (!key_default_sd)
{
size_t users_sid_len = security_sid_len( security_builtin_users_sid );
size_t admins_sid_len = security_sid_len( security_builtin_admins_sid );
size_t dacl_len = sizeof(ACL) + 2 * offsetof( ACCESS_ALLOWED_ACE, SidStart )
+ users_sid_len + admins_sid_len;
ACCESS_ALLOWED_ACE *aaa;
ACL *dacl;
key_default_sd = mem_alloc( sizeof(*key_default_sd) + 2 * admins_sid_len + dacl_len );
key_default_sd->control = SE_DACL_PRESENT;
key_default_sd->owner_len = admins_sid_len;
key_default_sd->group_len = admins_sid_len;
key_default_sd->sacl_len = 0;
key_default_sd->dacl_len = dacl_len;
memcpy( key_default_sd + 1, security_builtin_admins_sid, admins_sid_len );
memcpy( (char *)(key_default_sd + 1) + admins_sid_len, security_builtin_admins_sid, admins_sid_len );
dacl = (ACL *)((char *)(key_default_sd + 1) + 2 * admins_sid_len);
dacl->AclRevision = ACL_REVISION;
dacl->Sbz1 = 0;
dacl->AclSize = dacl_len;
dacl->AceCount = 2;
dacl->Sbz2 = 0;
aaa = (ACCESS_ALLOWED_ACE *)(dacl + 1);
aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
aaa->Header.AceFlags = INHERIT_ONLY_ACE | CONTAINER_INHERIT_ACE;
aaa->Header.AceSize = offsetof( ACCESS_ALLOWED_ACE, SidStart ) + users_sid_len;
aaa->Mask = GENERIC_READ;
memcpy( &aaa->SidStart, security_builtin_users_sid, users_sid_len );
aaa = (ACCESS_ALLOWED_ACE *)((char *)aaa + aaa->Header.AceSize);
aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
aaa->Header.AceFlags = 0;
aaa->Header.AceSize = offsetof( ACCESS_ALLOWED_ACE, SidStart ) + admins_sid_len;
aaa->Mask = KEY_ALL_ACCESS;
memcpy( &aaa->SidStart, security_builtin_admins_sid, admins_sid_len );
}
return key_default_sd;
}
/* close the notification associated with a handle */
static int key_close_handle( struct object *obj, struct process *process, obj_handle_t handle )
{
struct key * key = (struct key *) obj;
struct notify *notify = find_notify( key, process, handle );
if (notify) do_notification( key, notify, 1 );
return 1; /* ok to close */
}
static void key_destroy( struct object *obj )
{
int i;
struct list *ptr;
struct key *key = (struct key *)obj;
assert( obj->ops == &key_ops );
free( key->name );
free( key->class );
for (i = 0; i <= key->last_value; i++)
{
free( key->values[i].name );
free( key->values[i].data );
}
free( key->values );
for (i = 0; i <= key->last_subkey; i++)
{
key->subkeys[i]->parent = NULL;
release_object( key->subkeys[i] );
}
free( key->subkeys );
/* unconditionally notify everything waiting on this key */
while ((ptr = list_head( &key->notify_list )))
{
struct notify *notify = LIST_ENTRY( ptr, struct notify, entry );
do_notification( key, notify, 1 );
}
}
/* get the request vararg as registry path */
static inline void get_req_path( struct unicode_str *str, int skip_root )
{
str->str = get_req_data();
str->len = (get_req_data_size() / sizeof(WCHAR)) * sizeof(WCHAR);
if (skip_root && str->len >= sizeof(root_name) &&
!memicmpW( str->str, root_name, sizeof(root_name)/sizeof(WCHAR) ))
{
str->str += sizeof(root_name)/sizeof(WCHAR);
str->len -= sizeof(root_name);
}
}
/* return the next token in a given path */
/* token->str must point inside the path, or be NULL for the first call */
static struct unicode_str *get_path_token( const struct unicode_str *path, struct unicode_str *token )
{
data_size_t i = 0, len = path->len / sizeof(WCHAR);
if (!token->str) /* first time */
{
/* path cannot start with a backslash */
if (len && path->str[0] == '\\')
{
set_error( STATUS_OBJECT_PATH_INVALID );
return NULL;
}
}
else
{
i = token->str - path->str;
i += token->len / sizeof(WCHAR);
while (i < len && path->str[i] == '\\') i++;
}
token->str = path->str + i;
while (i < len && path->str[i] != '\\') i++;
token->len = (path->str + i - token->str) * sizeof(WCHAR);
return token;
}
/* allocate a key object */
static struct key *alloc_key( const struct unicode_str *name, timeout_t modif )
{
struct key *key;
if ((key = alloc_object( &key_ops )))
{
key->name = NULL;
key->class = NULL;
key->namelen = name->len;
key->classlen = 0;
key->flags = 0;
key->last_subkey = -1;
key->nb_subkeys = 0;
key->subkeys = NULL;
key->nb_values = 0;
key->last_value = -1;
key->values = NULL;
key->modif = modif;
key->parent = NULL;
list_init( &key->notify_list );
if (name->len && !(key->name = memdup( name->str, name->len )))
{
release_object( key );
key = NULL;
}
}
return key;
}
/* mark a key and all its parents as dirty (modified) */
static void make_dirty( struct key *key )
{
while (key)
{
if (key->flags & (KEY_DIRTY|KEY_VOLATILE)) return; /* nothing to do */
key->flags |= KEY_DIRTY;
key = key->parent;
}
}
/* mark a key and all its subkeys as clean (not modified) */
static void make_clean( struct key *key )
{
int i;
if (key->flags & KEY_VOLATILE) return;
if (!(key->flags & KEY_DIRTY)) return;
key->flags &= ~KEY_DIRTY;
for (i = 0; i <= key->last_subkey; i++) make_clean( key->subkeys[i] );
}
/* go through all the notifications and send them if necessary */
static void check_notify( struct key *key, unsigned int change, int not_subtree )
{
struct list *ptr, *next;
LIST_FOR_EACH_SAFE( ptr, next, &key->notify_list )
{
struct notify *n = LIST_ENTRY( ptr, struct notify, entry );
if ( ( not_subtree || n->subtree ) && ( change & n->filter ) )
do_notification( key, n, 0 );
}
}
/* update key modification time */
static void touch_key( struct key *key, unsigned int change )
{
struct key *k;
key->modif = current_time;
make_dirty( key );
/* do notifications */
check_notify( key, change, 1 );
for ( k = key->parent; k; k = k->parent )
check_notify( k, change & ~REG_NOTIFY_CHANGE_LAST_SET, 0 );
}
/* try to grow the array of subkeys; return 1 if OK, 0 on error */
static int grow_subkeys( struct key *key )
{
struct key **new_subkeys;
int nb_subkeys;
if (key->nb_subkeys)
{
nb_subkeys = key->nb_subkeys + (key->nb_subkeys / 2); /* grow by 50% */
if (!(new_subkeys = realloc( key->subkeys, nb_subkeys * sizeof(*new_subkeys) )))
{
set_error( STATUS_NO_MEMORY );
return 0;
}
}
else
{
nb_subkeys = MIN_VALUES;
if (!(new_subkeys = mem_alloc( nb_subkeys * sizeof(*new_subkeys) ))) return 0;
}
key->subkeys = new_subkeys;
key->nb_subkeys = nb_subkeys;
return 1;
}
/* allocate a subkey for a given key, and return its index */
static struct key *alloc_subkey( struct key *parent, const struct unicode_str *name,
int index, timeout_t modif )
{
struct key *key;
int i;
if (name->len > MAX_NAME_LEN * sizeof(WCHAR))
{
set_error( STATUS_INVALID_PARAMETER );
return NULL;
}
if (parent->last_subkey + 1 == parent->nb_subkeys)
{
/* need to grow the array */
if (!grow_subkeys( parent )) return NULL;
}
if ((key = alloc_key( name, modif )) != NULL)
{
key->parent = parent;
for (i = ++parent->last_subkey; i > index; i--)
parent->subkeys[i] = parent->subkeys[i-1];
parent->subkeys[index] = key;
if (is_wow6432node( key->name, key->namelen ) && !is_wow6432node( parent->name, parent->namelen ))
parent->flags |= KEY_WOW64;
}
return key;
}
/* free a subkey of a given key */
static void free_subkey( struct key *parent, int index )
{
struct key *key;
int i, nb_subkeys;
assert( index >= 0 );
assert( index <= parent->last_subkey );
key = parent->subkeys[index];
for (i = index; i < parent->last_subkey; i++) parent->subkeys[i] = parent->subkeys[i + 1];
parent->last_subkey--;
key->flags |= KEY_DELETED;
key->parent = NULL;
if (is_wow6432node( key->name, key->namelen )) parent->flags &= ~KEY_WOW64;
release_object( key );
/* try to shrink the array */
nb_subkeys = parent->nb_subkeys;
if (nb_subkeys > MIN_SUBKEYS && parent->last_subkey < nb_subkeys / 2)
{
struct key **new_subkeys;
nb_subkeys -= nb_subkeys / 3; /* shrink by 33% */
if (nb_subkeys < MIN_SUBKEYS) nb_subkeys = MIN_SUBKEYS;
if (!(new_subkeys = realloc( parent->subkeys, nb_subkeys * sizeof(*new_subkeys) ))) return;
parent->subkeys = new_subkeys;
parent->nb_subkeys = nb_subkeys;
}
}
/* find the named child of a given key and return its index */
static struct key *find_subkey( const struct key *key, const struct unicode_str *name, int *index )
{
int i, min, max, res;
data_size_t len;
min = 0;
max = key->last_subkey;
while (min <= max)
{
i = (min + max) / 2;
len = min( key->subkeys[i]->namelen, name->len );
res = memicmpW( key->subkeys[i]->name, name->str, len / sizeof(WCHAR) );
if (!res) res = key->subkeys[i]->namelen - name->len;
if (!res)
{
*index = i;
return key->subkeys[i];
}
if (res > 0) max = i - 1;
else min = i + 1;
}
*index = min; /* this is where we should insert it */
return NULL;
}
/* return the wow64 variant of the key, or the key itself if none */
static struct key *find_wow64_subkey( struct key *key, const struct unicode_str *name )
{
static const struct unicode_str wow6432node_str = { wow6432node, sizeof(wow6432node) };
int index;
if (!(key->flags & KEY_WOW64)) return key;
if (!is_wow6432node( name->str, name->len ))
{
key = find_subkey( key, &wow6432node_str, &index );
assert( key ); /* if KEY_WOW64 is set we must find it */
}
return key;
}
/* follow a symlink and return the resolved key */
static struct key *follow_symlink( struct key *key, int iteration )
{
struct unicode_str path, token;
struct key_value *value;
int index;
if (iteration > 16) return NULL;
if (!(key->flags & KEY_SYMLINK)) return key;
if (!(value = find_value( key, &symlink_str, &index ))) return NULL;
path.str = value->data;
path.len = (value->len / sizeof(WCHAR)) * sizeof(WCHAR);
if (path.len <= sizeof(root_name)) return NULL;
if (memicmpW( path.str, root_name, sizeof(root_name)/sizeof(WCHAR) )) return NULL;
path.str += sizeof(root_name) / sizeof(WCHAR);
path.len -= sizeof(root_name);
key = root_key;
token.str = NULL;
if (!get_path_token( &path, &token )) return NULL;
while (token.len)
{
if (!(key = find_subkey( key, &token, &index ))) break;
if (!(key = follow_symlink( key, iteration + 1 ))) break;
get_path_token( &path, &token );
}
return key;
}
/* open a key until we find an element that doesn't exist */
/* helper for open_key and create_key */
static struct key *open_key_prefix( struct key *key, const struct unicode_str *name,
unsigned int access, struct unicode_str *token, int *index )
{
token->str = NULL;
if (!get_path_token( name, token )) return NULL;
if (access & KEY_WOW64_32KEY) key = find_wow64_subkey( key, token );
while (token->len)
{
struct key *subkey;
if (!(subkey = find_subkey( key, token, index )))
{
if ((key->flags & KEY_WOWSHARE) && !(access & KEY_WOW64_64KEY))
{
/* try in the 64-bit parent */
key = key->parent;
subkey = find_subkey( key, token, index );
}
}
if (!subkey) break;
key = subkey;
get_path_token( name, token );
if (!token->len) break;
if (!(access & KEY_WOW64_64KEY)) key = find_wow64_subkey( key, token );
if (!(key = follow_symlink( key, 0 )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
}
return key;
}
/* open a subkey */
static struct key *open_key( struct key *key, const struct unicode_str *name, unsigned int access,
unsigned int attributes )
{
int index;
struct unicode_str token;
if (!(key = open_key_prefix( key, name, access, &token, &index ))) return NULL;
if (token.len)
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
if (!(access & KEY_WOW64_64KEY)) key = find_wow64_subkey( key, &token );
if (!(attributes & OBJ_OPENLINK) && !(key = follow_symlink( key, 0 )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
if (debug_level > 1) dump_operation( key, NULL, "Open" );
grab_object( key );
return key;
}
/* create a subkey */
static struct key *create_key( struct key *key, const struct unicode_str *name,
const struct unicode_str *class, unsigned int options,
unsigned int access, unsigned int attributes,
const struct security_descriptor *sd, int *created )
{
int index;
struct unicode_str token, next;
*created = 0;
if (!(key = open_key_prefix( key, name, access, &token, &index ))) return NULL;
if (!token.len) /* the key already exists */
{
if (!(access & KEY_WOW64_64KEY)) key = find_wow64_subkey( key, &token );
if (options & REG_OPTION_CREATE_LINK)
{
set_error( STATUS_OBJECT_NAME_COLLISION );
return NULL;
}
if (!(attributes & OBJ_OPENLINK) && !(key = follow_symlink( key, 0 )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
if (debug_level > 1) dump_operation( key, NULL, "Open" );
grab_object( key );
return key;
}
/* token must be the last path component at this point */
next = token;
get_path_token( name, &next );
if (next.len)
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
if ((key->flags & KEY_VOLATILE) && !(options & REG_OPTION_VOLATILE))
{
set_error( STATUS_CHILD_MUST_BE_VOLATILE );
return NULL;
}
*created = 1;
make_dirty( key );
if (!(key = alloc_subkey( key, &token, index, current_time ))) return NULL;
if (options & REG_OPTION_CREATE_LINK) key->flags |= KEY_SYMLINK;
if (options & REG_OPTION_VOLATILE) key->flags |= KEY_VOLATILE;
else key->flags |= KEY_DIRTY;
if (sd) default_set_sd( &key->obj, sd, OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION |
DACL_SECURITY_INFORMATION | SACL_SECURITY_INFORMATION );
if (debug_level > 1) dump_operation( key, NULL, "Create" );
if (class && class->len)
{
key->classlen = class->len;
free(key->class);
if (!(key->class = memdup( class->str, key->classlen ))) key->classlen = 0;
}
touch_key( key->parent, REG_NOTIFY_CHANGE_NAME );
grab_object( key );
return key;
}
/* recursively create a subkey (for internal use only) */
static struct key *create_key_recursive( struct key *key, const struct unicode_str *name, timeout_t modif )
{
struct key *base;
int index;
struct unicode_str token;
token.str = NULL;
if (!get_path_token( name, &token )) return NULL;
while (token.len)
{
struct key *subkey;
if (!(subkey = find_subkey( key, &token, &index ))) break;
key = subkey;
if (!(key = follow_symlink( key, 0 )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
get_path_token( name, &token );
}
if (token.len)
{
if (!(key = alloc_subkey( key, &token, index, modif ))) return NULL;
base = key;
for (;;)
{
get_path_token( name, &token );
if (!token.len) break;
/* we know the index is always 0 in a new key */
if (!(key = alloc_subkey( key, &token, 0, modif )))
{
free_subkey( base, index );
return NULL;
}
}
}
grab_object( key );
return key;
}
/* query information about a key or a subkey */
static void enum_key( const struct key *key, int index, int info_class,
struct enum_key_reply *reply )
{
static const WCHAR backslash[] = { '\\' };
int i;
data_size_t len, namelen, classlen;
data_size_t max_subkey = 0, max_class = 0;
data_size_t max_value = 0, max_data = 0;
const struct key *k;
char *data;
if (index != -1) /* -1 means use the specified key directly */
{
if ((index < 0) || (index > key->last_subkey))
{
set_error( STATUS_NO_MORE_ENTRIES );
return;
}
key = key->subkeys[index];
}
namelen = key->namelen;
classlen = key->classlen;
switch(info_class)
{
case KeyNameInformation:
namelen = 0;
for (k = key; k != root_key; k = k->parent)
namelen += k->namelen + sizeof(backslash);
if (!namelen) return;
namelen += sizeof(root_name) - sizeof(backslash);
/* fall through */
case KeyBasicInformation:
classlen = 0; /* only return the name */
/* fall through */
case KeyNodeInformation:
reply->max_subkey = 0;
reply->max_class = 0;
reply->max_value = 0;
reply->max_data = 0;
break;
case KeyFullInformation:
case KeyCachedInformation:
for (i = 0; i <= key->last_subkey; i++)
{
if (key->subkeys[i]->namelen > max_subkey) max_subkey = key->subkeys[i]->namelen;
if (key->subkeys[i]->classlen > max_class) max_class = key->subkeys[i]->classlen;
}
for (i = 0; i <= key->last_value; i++)
{
if (key->values[i].namelen > max_value) max_value = key->values[i].namelen;
if (key->values[i].len > max_data) max_data = key->values[i].len;
}
reply->max_subkey = max_subkey;
reply->max_class = max_class;
reply->max_value = max_value;
reply->max_data = max_data;
reply->namelen = namelen;
if (info_class == KeyCachedInformation)
classlen = 0; /* don't return any data, only its size */
namelen = 0; /* don't return name */
break;
default:
set_error( STATUS_INVALID_PARAMETER );
return;
}
reply->subkeys = key->last_subkey + 1;
reply->values = key->last_value + 1;
reply->modif = key->modif;
reply->total = namelen + classlen;
len = min( reply->total, get_reply_max_size() );
if (len && (data = set_reply_data_size( len )))
{
if (len > namelen)
{
reply->namelen = namelen;
memcpy( data, key->name, namelen );
memcpy( data + namelen, key->class, len - namelen );
}
else if (info_class == KeyNameInformation)
{
data_size_t pos = namelen;
reply->namelen = namelen;
for (k = key; k != root_key; k = k->parent)
{
pos -= k->namelen;
if (pos < len) memcpy( data + pos, k->name,
min( k->namelen, len - pos ) );
pos -= sizeof(backslash);
if (pos < len) memcpy( data + pos, backslash,
min( sizeof(backslash), len - pos ) );
}
memcpy( data, root_name, min( sizeof(root_name) - sizeof(backslash), len ) );
}
else
{
reply->namelen = len;
memcpy( data, key->name, len );
}
}
if (debug_level > 1) dump_operation( key, NULL, "Enum" );
}
/* delete a key and its values */
static int delete_key( struct key *key, int recurse )
{
int index;
struct key *parent = key->parent;
/* must find parent and index */
if (key == root_key)
{
set_error( STATUS_ACCESS_DENIED );
return -1;
}
assert( parent );
while (recurse && (key->last_subkey>=0))
if (0 > delete_key(key->subkeys[key->last_subkey], 1))
return -1;
for (index = 0; index <= parent->last_subkey; index++)
if (parent->subkeys[index] == key) break;
assert( index <= parent->last_subkey );
/* we can only delete a key that has no subkeys */
if (key->last_subkey >= 0)
{
set_error( STATUS_ACCESS_DENIED );
return -1;
}
if (debug_level > 1) dump_operation( key, NULL, "Delete" );
free_subkey( parent, index );
touch_key( parent, REG_NOTIFY_CHANGE_NAME );
return 0;
}
/* try to grow the array of values; return 1 if OK, 0 on error */
static int grow_values( struct key *key )
{
struct key_value *new_val;
int nb_values;
if (key->nb_values)
{
nb_values = key->nb_values + (key->nb_values / 2); /* grow by 50% */
if (!(new_val = realloc( key->values, nb_values * sizeof(*new_val) )))
{
set_error( STATUS_NO_MEMORY );
return 0;
}
}
else
{
nb_values = MIN_VALUES;
if (!(new_val = mem_alloc( nb_values * sizeof(*new_val) ))) return 0;
}
key->values = new_val;
key->nb_values = nb_values;
return 1;
}
/* find the named value of a given key and return its index in the array */
static struct key_value *find_value( const struct key *key, const struct unicode_str *name, int *index )
{
int i, min, max, res;
data_size_t len;
min = 0;
max = key->last_value;
while (min <= max)
{
i = (min + max) / 2;
len = min( key->values[i].namelen, name->len );
res = memicmpW( key->values[i].name, name->str, len / sizeof(WCHAR) );
if (!res) res = key->values[i].namelen - name->len;
if (!res)
{
*index = i;
return &key->values[i];
}
if (res > 0) max = i - 1;
else min = i + 1;
}
*index = min; /* this is where we should insert it */
return NULL;
}
/* insert a new value; the index must have been returned by find_value */
static struct key_value *insert_value( struct key *key, const struct unicode_str *name, int index )
{
struct key_value *value;
WCHAR *new_name = NULL;
int i;
if (name->len > MAX_VALUE_LEN * sizeof(WCHAR))
{
set_error( STATUS_NAME_TOO_LONG );
return NULL;
}
if (key->last_value + 1 == key->nb_values)
{
if (!grow_values( key )) return NULL;
}
if (name->len && !(new_name = memdup( name->str, name->len ))) return NULL;
for (i = ++key->last_value; i > index; i--) key->values[i] = key->values[i - 1];
value = &key->values[index];
value->name = new_name;
value->namelen = name->len;
value->len = 0;
value->data = NULL;
return value;
}
/* set a key value */
static void set_value( struct key *key, const struct unicode_str *name,
int type, const void *data, data_size_t len )
{
struct key_value *value;
void *ptr = NULL;
int index;
if ((value = find_value( key, name, &index )))
{
/* check if the new value is identical to the existing one */
if (value->type == type && value->len == len &&
value->data && !memcmp( value->data, data, len ))
{
if (debug_level > 1) dump_operation( key, value, "Skip setting" );
return;
}
}
if (key->flags & KEY_SYMLINK)
{
if (type != REG_LINK || name->len != symlink_str.len ||
memicmpW( name->str, symlink_str.str, name->len / sizeof(WCHAR) ))
{
set_error( STATUS_ACCESS_DENIED );
return;
}
}
if (len && !(ptr = memdup( data, len ))) return;
if (!value)
{
if (!(value = insert_value( key, name, index )))
{
free( ptr );
return;
}
}
else free( value->data ); /* already existing, free previous data */
value->type = type;
value->len = len;
value->data = ptr;
touch_key( key, REG_NOTIFY_CHANGE_LAST_SET );
if (debug_level > 1) dump_operation( key, value, "Set" );
}
/* get a key value */
static void get_value( struct key *key, const struct unicode_str *name, int *type, data_size_t *len )
{
struct key_value *value;
int index;
if ((value = find_value( key, name, &index )))
{
*type = value->type;
*len = value->len;
if (value->data) set_reply_data( value->data, min( value->len, get_reply_max_size() ));
if (debug_level > 1) dump_operation( key, value, "Get" );
}
else
{
*type = -1;
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
}
}
/* enumerate a key value */
static void enum_value( struct key *key, int i, int info_class, struct enum_key_value_reply *reply )
{
struct key_value *value;
if (i < 0 || i > key->last_value) set_error( STATUS_NO_MORE_ENTRIES );
else
{
void *data;
data_size_t namelen, maxlen;
value = &key->values[i];
reply->type = value->type;
namelen = value->namelen;
switch(info_class)
{
case KeyValueBasicInformation:
reply->total = namelen;
break;
case KeyValueFullInformation:
reply->total = namelen + value->len;
break;
case KeyValuePartialInformation:
reply->total = value->len;
namelen = 0;
break;
default:
set_error( STATUS_INVALID_PARAMETER );
return;
}
maxlen = min( reply->total, get_reply_max_size() );
if (maxlen && ((data = set_reply_data_size( maxlen ))))
{
if (maxlen > namelen)
{
reply->namelen = namelen;
memcpy( data, value->name, namelen );
memcpy( (char *)data + namelen, value->data, maxlen - namelen );
}
else
{
reply->namelen = maxlen;
memcpy( data, value->name, maxlen );
}
}
if (debug_level > 1) dump_operation( key, value, "Enum" );
}
}
/* delete a value */
static void delete_value( struct key *key, const struct unicode_str *name )
{
struct key_value *value;
int i, index, nb_values;
if (!(value = find_value( key, name, &index )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return;
}
if (debug_level > 1) dump_operation( key, value, "Delete" );
free( value->name );
free( value->data );
for (i = index; i < key->last_value; i++) key->values[i] = key->values[i + 1];
key->last_value--;
touch_key( key, REG_NOTIFY_CHANGE_LAST_SET );
/* try to shrink the array */
nb_values = key->nb_values;
if (nb_values > MIN_VALUES && key->last_value < nb_values / 2)
{
struct key_value *new_val;
nb_values -= nb_values / 3; /* shrink by 33% */
if (nb_values < MIN_VALUES) nb_values = MIN_VALUES;
if (!(new_val = realloc( key->values, nb_values * sizeof(*new_val) ))) return;
key->values = new_val;
key->nb_values = nb_values;
}
}
/* get the registry key corresponding to an hkey handle */
static struct key *get_hkey_obj( obj_handle_t hkey, unsigned int access )
{
struct key *key = (struct key *)get_handle_obj( current->process, hkey, access, &key_ops );
if (key && key->flags & KEY_DELETED)
{
set_error( STATUS_KEY_DELETED );
release_object( key );
key = NULL;
}
return key;
}
/* get the registry key corresponding to a parent key handle */
static inline struct key *get_parent_hkey_obj( obj_handle_t hkey )
{
if (!hkey) return (struct key *)grab_object( root_key );
return get_hkey_obj( hkey, 0 );
}
/* read a line from the input file */
static int read_next_line( struct file_load_info *info )
{
char *newbuf;
int newlen, pos = 0;
info->line++;
for (;;)
{
if (!fgets( info->buffer + pos, info->len - pos, info->file ))
return (pos != 0); /* EOF */
pos = strlen(info->buffer);
if (info->buffer[pos-1] == '\n')
{
/* got a full line */
info->buffer[--pos] = 0;
if (pos > 0 && info->buffer[pos-1] == '\r') info->buffer[pos-1] = 0;
return 1;
}
if (pos < info->len - 1) return 1; /* EOF but something was read */
/* need to enlarge the buffer */
newlen = info->len + info->len / 2;
if (!(newbuf = realloc( info->buffer, newlen )))
{
set_error( STATUS_NO_MEMORY );
return -1;
}
info->buffer = newbuf;
info->len = newlen;
}
}
/* make sure the temp buffer holds enough space */
static int get_file_tmp_space( struct file_load_info *info, size_t size )
{
WCHAR *tmp;
if (info->tmplen >= size) return 1;
if (!(tmp = realloc( info->tmp, size )))
{
set_error( STATUS_NO_MEMORY );
return 0;
}
info->tmp = tmp;
info->tmplen = size;
return 1;
}
/* report an error while loading an input file */
static void file_read_error( const char *err, struct file_load_info *info )
{
if (info->filename)
fprintf( stderr, "%s:%d: %s '%s'\n", info->filename, info->line, err, info->buffer );
else
fprintf( stderr, "<fd>:%d: %s '%s'\n", info->line, err, info->buffer );
}
/* convert a data type tag to a value type */
static int get_data_type( const char *buffer, int *type, int *parse_type )
{
struct data_type { const char *tag; int len; int type; int parse_type; };
static const struct data_type data_types[] =
{ /* actual type */ /* type to assume for parsing */
{ "\"", 1, REG_SZ, REG_SZ },
{ "str:\"", 5, REG_SZ, REG_SZ },
{ "str(2):\"", 8, REG_EXPAND_SZ, REG_SZ },
{ "str(7):\"", 8, REG_MULTI_SZ, REG_SZ },
{ "hex:", 4, REG_BINARY, REG_BINARY },
{ "dword:", 6, REG_DWORD, REG_DWORD },
{ "hex(", 4, -1, REG_BINARY },
{ NULL, 0, 0, 0 }
};
const struct data_type *ptr;
char *end;
for (ptr = data_types; ptr->tag; ptr++)
{
if (strncmp( ptr->tag, buffer, ptr->len )) continue;
*parse_type = ptr->parse_type;
if ((*type = ptr->type) != -1) return ptr->len;
/* "hex(xx):" is special */
*type = (int)strtoul( buffer + 4, &end, 16 );
if ((end <= buffer) || strncmp( end, "):", 2 )) return 0;
return end + 2 - buffer;
}
return 0;
}
/* load and create a key from the input file */
static struct key *load_key( struct key *base, const char *buffer, int prefix_len,
struct file_load_info *info, timeout_t *modif )
{
WCHAR *p;
struct unicode_str name;
int res;
unsigned int mod;
data_size_t len;
if (!get_file_tmp_space( info, strlen(buffer) * sizeof(WCHAR) )) return NULL;
len = info->tmplen;
if ((res = parse_strW( info->tmp, &len, buffer, ']' )) == -1)
{
file_read_error( "Malformed key", info );
return NULL;
}
if (sscanf( buffer + res, " %u", &mod ) == 1)
*modif = (timeout_t)mod * TICKS_PER_SEC + ticks_1601_to_1970;
else
*modif = current_time;
p = info->tmp;
while (prefix_len && *p) { if (*p++ == '\\') prefix_len--; }
if (!*p)
{
if (prefix_len > 1)
{
file_read_error( "Malformed key", info );
return NULL;
}
/* empty key name, return base key */
return (struct key *)grab_object( base );
}
name.str = p;
name.len = len - (p - info->tmp + 1) * sizeof(WCHAR);
return create_key_recursive( base, &name, 0 );
}
/* update the modification time of a key (and its parents) after it has been loaded from a file */
static void update_key_time( struct key *key, timeout_t modif )
{
while (key && !key->modif)
{
key->modif = modif;
key = key->parent;
}
}
/* load a global option from the input file */
static int load_global_option( const char *buffer, struct file_load_info *info )
{
const char *p;
if (!strncmp( buffer, "#arch=", 6 ))
{
enum prefix_type type;
p = buffer + 6;
if (!strcmp( p, "win32" )) type = PREFIX_32BIT;
else if (!strcmp( p, "win64" )) type = PREFIX_64BIT;
else
{
file_read_error( "Unknown architecture", info );
set_error( STATUS_NOT_REGISTRY_FILE );
return 0;
}
if (prefix_type == PREFIX_UNKNOWN) prefix_type = type;
else if (type != prefix_type)
{
file_read_error( "Mismatched architecture", info );
set_error( STATUS_NOT_REGISTRY_FILE );
return 0;
}
}
/* ignore unknown options */
return 1;
}
/* load a key option from the input file */
static int load_key_option( struct key *key, const char *buffer, struct file_load_info *info )
{
const char *p;
data_size_t len;
if (!strncmp( buffer, "#time=", 6 ))
{
timeout_t modif = 0;
for (p = buffer + 6; *p; p++)
{
if (*p >= '0' && *p <= '9') modif = (modif << 4) | (*p - '0');
else if (*p >= 'A' && *p <= 'F') modif = (modif << 4) | (*p - 'A' + 10);
else if (*p >= 'a' && *p <= 'f') modif = (modif << 4) | (*p - 'a' + 10);
else break;
}
update_key_time( key, modif );
}
if (!strncmp( buffer, "#class=", 7 ))
{
p = buffer + 7;
if (*p++ != '"') return 0;
if (!get_file_tmp_space( info, strlen(p) * sizeof(WCHAR) )) return 0;
len = info->tmplen;
if (parse_strW( info->tmp, &len, p, '\"' ) == -1) return 0;
free( key->class );
if (!(key->class = memdup( info->tmp, len ))) len = 0;
key->classlen = len;
}
if (!strncmp( buffer, "#link", 5 )) key->flags |= KEY_SYMLINK;
/* ignore unknown options */
return 1;
}
/* parse a comma-separated list of hex digits */
static int parse_hex( unsigned char *dest, data_size_t *len, const char *buffer )
{
const char *p = buffer;
data_size_t count = 0;
char *end;
while (isxdigit(*p))
{
unsigned int val = strtoul( p, &end, 16 );
if (end == p || val > 0xff) return -1;
if (count++ >= *len) return -1; /* dest buffer overflow */
*dest++ = val;
p = end;
while (isspace(*p)) p++;
if (*p == ',') p++;
while (isspace(*p)) p++;
}
*len = count;
return p - buffer;
}
/* parse a value name and create the corresponding value */
static struct key_value *parse_value_name( struct key *key, const char *buffer, data_size_t *len,
struct file_load_info *info )
{
struct key_value *value;
struct unicode_str name;
int index;
if (!get_file_tmp_space( info, strlen(buffer) * sizeof(WCHAR) )) return NULL;
name.str = info->tmp;
name.len = info->tmplen;
if (buffer[0] == '@')
{
name.len = 0;
*len = 1;
}
else
{
int r = parse_strW( info->tmp, &name.len, buffer + 1, '\"' );
if (r == -1) goto error;
*len = r + 1; /* for initial quote */
name.len -= sizeof(WCHAR); /* terminating null */
}
while (isspace(buffer[*len])) (*len)++;
if (buffer[*len] != '=') goto error;
(*len)++;
while (isspace(buffer[*len])) (*len)++;
if (!(value = find_value( key, &name, &index ))) value = insert_value( key, &name, index );
return value;
error:
file_read_error( "Malformed value name", info );
return NULL;
}
/* load a value from the input file */
static int load_value( struct key *key, const char *buffer, struct file_load_info *info )
{
DWORD dw;
void *ptr, *newptr;
int res, type, parse_type;
data_size_t maxlen, len;
struct key_value *value;
if (!(value = parse_value_name( key, buffer, &len, info ))) return 0;
if (!(res = get_data_type( buffer + len, &type, &parse_type ))) goto error;
buffer += len + res;
switch(parse_type)
{
case REG_SZ:
if (!get_file_tmp_space( info, strlen(buffer) * sizeof(WCHAR) )) return 0;
len = info->tmplen;
if ((res = parse_strW( info->tmp, &len, buffer, '\"' )) == -1) goto error;
ptr = info->tmp;
break;
case REG_DWORD:
dw = strtoul( buffer, NULL, 16 );
ptr = &dw;
len = sizeof(dw);
break;
case REG_BINARY: /* hex digits */
len = 0;
for (;;)
{
maxlen = 1 + strlen(buffer) / 2; /* at least 2 chars for one hex byte */
if (!get_file_tmp_space( info, len + maxlen )) return 0;
if ((res = parse_hex( (unsigned char *)info->tmp + len, &maxlen, buffer )) == -1) goto error;
len += maxlen;
buffer += res;
while (isspace(*buffer)) buffer++;
if (!*buffer) break;
if (*buffer != '\\') goto error;
if (read_next_line( info) != 1) goto error;
buffer = info->buffer;
while (isspace(*buffer)) buffer++;
}
ptr = info->tmp;
break;
default:
assert(0);
ptr = NULL; /* keep compiler quiet */
break;
}
if (!len) newptr = NULL;
else if (!(newptr = memdup( ptr, len ))) return 0;
free( value->data );
value->data = newptr;
value->len = len;
value->type = type;
return 1;
error:
file_read_error( "Malformed value", info );
free( value->data );
value->data = NULL;
value->len = 0;
value->type = REG_NONE;
return 0;
}
/* return the length (in path elements) of name that is part of the key name */
/* for instance if key is USER\foo\bar and name is foo\bar\baz, return 2 */
static int get_prefix_len( struct key *key, const char *name, struct file_load_info *info )
{
WCHAR *p;
int res;
data_size_t len;
if (!get_file_tmp_space( info, strlen(name) * sizeof(WCHAR) )) return 0;
len = info->tmplen;
if ((res = parse_strW( info->tmp, &len, name, ']' )) == -1)
{
file_read_error( "Malformed key", info );
return 0;
}
for (p = info->tmp; *p; p++) if (*p == '\\') break;
len = (p - info->tmp) * sizeof(WCHAR);
for (res = 1; key != root_key; res++)
{
if (len == key->namelen && !memicmpW( info->tmp, key->name, len / sizeof(WCHAR) )) break;
key = key->parent;
}
if (key == root_key) res = 0; /* no matching name */
return res;
}
/* load all the keys from the input file */
/* prefix_len is the number of key name prefixes to skip, or -1 for autodetection */
static void load_keys( struct key *key, const char *filename, FILE *f, int prefix_len )
{
struct key *subkey = NULL;
struct file_load_info info;
timeout_t modif = current_time;
char *p;
info.filename = filename;
info.file = f;
info.len = 4;
info.tmplen = 4;
info.line = 0;
if (!(info.buffer = mem_alloc( info.len ))) return;
if (!(info.tmp = mem_alloc( info.tmplen )))
{
free( info.buffer );
return;
}
if ((read_next_line( &info ) != 1) ||
strcmp( info.buffer, "WINE REGISTRY Version 2" ))
{
set_error( STATUS_NOT_REGISTRY_FILE );
goto done;
}
while (read_next_line( &info ) == 1)
{
p = info.buffer;
while (*p && isspace(*p)) p++;
switch(*p)
{
case '[': /* new key */
if (subkey)
{
update_key_time( subkey, modif );
release_object( subkey );
}
if (prefix_len == -1) prefix_len = get_prefix_len( key, p + 1, &info );
if (!(subkey = load_key( key, p + 1, prefix_len, &info, &modif )))
file_read_error( "Error creating key", &info );
break;
case '@': /* default value */
case '\"': /* value */
if (subkey) load_value( subkey, p, &info );
else file_read_error( "Value without key", &info );
break;
case '#': /* option */
if (subkey) load_key_option( subkey, p, &info );
else if (!load_global_option( p, &info )) goto done;
break;
case ';': /* comment */
case 0: /* empty line */
break;
default:
file_read_error( "Unrecognized input", &info );
break;
}
}
done:
if (subkey)
{
update_key_time( subkey, modif );
release_object( subkey );
}
free( info.buffer );
free( info.tmp );
}
/* load a part of the registry from a file */
static void load_registry( struct key *key, obj_handle_t handle )
{
struct file *file;
int fd;
if (!(file = get_file_obj( current->process, handle, FILE_READ_DATA ))) return;
fd = dup( get_file_unix_fd( file ) );
release_object( file );
if (fd != -1)
{
FILE *f = fdopen( fd, "r" );
if (f)
{
load_keys( key, NULL, f, -1 );
fclose( f );
}
else file_set_error();
}
}
/* load one of the initial registry files */
static int load_init_registry_from_file( const char *filename, struct key *key )
{
FILE *f;
if ((f = fopen( filename, "r" )))
{
load_keys( key, filename, f, 0 );
fclose( f );
if (get_error() == STATUS_NOT_REGISTRY_FILE)
{
fprintf( stderr, "%s is not a valid registry file\n", filename );
return 1;
}
}
assert( save_branch_count < MAX_SAVE_BRANCH_INFO );
save_branch_info[save_branch_count].path = filename;
save_branch_info[save_branch_count++].key = (struct key *)grab_object( key );
make_object_static( &key->obj );
return (f != NULL);
}
static WCHAR *format_user_registry_path( const SID *sid, struct unicode_str *path )
{
static const WCHAR prefixW[] = {'U','s','e','r','\\','S',0};
static const WCHAR formatW[] = {'-','%','u',0};
WCHAR buffer[7 + 10 + 10 + 10 * SID_MAX_SUB_AUTHORITIES];
WCHAR *p = buffer;
unsigned int i;
strcpyW( p, prefixW );
p += strlenW( prefixW );
p += sprintfW( p, formatW, sid->Revision );
p += sprintfW( p, formatW, MAKELONG( MAKEWORD( sid->IdentifierAuthority.Value[5],
sid->IdentifierAuthority.Value[4] ),
MAKEWORD( sid->IdentifierAuthority.Value[3],
sid->IdentifierAuthority.Value[2] )));
for (i = 0; i < sid->SubAuthorityCount; i++)
p += sprintfW( p, formatW, sid->SubAuthority[i] );
path->len = (p - buffer) * sizeof(WCHAR);
path->str = p = memdup( buffer, path->len );
return p;
}
/* get the cpu architectures that can be supported in the current prefix */
unsigned int get_prefix_cpu_mask(void)
{
/* Allowed server/client/prefix combinations:
*
* prefix
* 32 64
* server +------+------+ client
* | ok | fail | 32
* 32 +------+------+---
* | fail | fail | 64
* ---+------+------+---
* | ok | ok | 32
* 64 +------+------+---
* | fail | ok | 64
* ---+------+------+---
*/
switch (prefix_type)
{
case PREFIX_64BIT:
/* 64-bit prefix requires 64-bit server */
return sizeof(void *) > sizeof(int) ? ~0 : 0;
case PREFIX_32BIT:
default:
return ~CPU_64BIT_MASK; /* only 32-bit cpus supported on 32-bit prefix */
}
}
/* registry initialisation */
void init_registry(void)
{
static const WCHAR HKLM[] = { 'M','a','c','h','i','n','e' };
static const WCHAR HKU_default[] = { 'U','s','e','r','\\','.','D','e','f','a','u','l','t' };
static const WCHAR classes[] = {'S','o','f','t','w','a','r','e','\\',
'C','l','a','s','s','e','s','\\',
'W','o','w','6','4','3','2','N','o','d','e'};
static const struct unicode_str root_name = { NULL, 0 };
static const struct unicode_str HKLM_name = { HKLM, sizeof(HKLM) };
static const struct unicode_str HKU_name = { HKU_default, sizeof(HKU_default) };
static const struct unicode_str classes_name = { classes, sizeof(classes) };
WCHAR *current_user_path;
struct unicode_str current_user_str;
struct key *key, *hklm, *hkcu;
char *p;
/* switch to the config dir */
if (fchdir( config_dir_fd ) == -1) fatal_error( "chdir to config dir: %s\n", strerror( errno ));
/* create the root key */
root_key = alloc_key( &root_name, current_time );
assert( root_key );
make_object_static( &root_key->obj );
/* load system.reg into Registry\Machine */
if (!(hklm = create_key_recursive( root_key, &HKLM_name, current_time )))
fatal_error( "could not create Machine registry key\n" );
if (!load_init_registry_from_file( "system.reg", hklm ))
{
if ((p = getenv( "WINEARCH" )) && !strcmp( p, "win32" ))
prefix_type = PREFIX_32BIT;
else
prefix_type = sizeof(void *) > sizeof(int) ? PREFIX_64BIT : PREFIX_32BIT;
}
else if (prefix_type == PREFIX_UNKNOWN)
prefix_type = PREFIX_32BIT;
/* load userdef.reg into Registry\User\.Default */
if (!(key = create_key_recursive( root_key, &HKU_name, current_time )))
fatal_error( "could not create User\\.Default registry key\n" );
load_init_registry_from_file( "userdef.reg", key );
release_object( key );
/* load user.reg into HKEY_CURRENT_USER */
/* FIXME: match default user in token.c. should get from process token instead */
current_user_path = format_user_registry_path( security_local_user_sid, &current_user_str );
if (!current_user_path ||
!(hkcu = create_key_recursive( root_key, &current_user_str, current_time )))
fatal_error( "could not create HKEY_CURRENT_USER registry key\n" );
free( current_user_path );
load_init_registry_from_file( "user.reg", hkcu );
/* set the shared flag on Software\Classes\Wow6432Node */
if (prefix_type == PREFIX_64BIT)
{
if ((key = create_key_recursive( hklm, &classes_name, current_time )))
{
key->flags |= KEY_WOWSHARE;
release_object( key );
}
/* FIXME: handle HKCU too */
}
release_object( hklm );
release_object( hkcu );
/* start the periodic save timer */
set_periodic_save_timer();
/* go back to the server dir */
if (fchdir( server_dir_fd ) == -1) fatal_error( "chdir to server dir: %s\n", strerror( errno ));
}
/* save a registry branch to a file */
static void save_all_subkeys( struct key *key, FILE *f )
{
fprintf( f, "WINE REGISTRY Version 2\n" );
fprintf( f, ";; All keys relative to " );
dump_path( key, NULL, f );
fprintf( f, "\n" );
switch (prefix_type)
{
case PREFIX_32BIT:
fprintf( f, "\n#arch=win32\n" );
break;
case PREFIX_64BIT:
fprintf( f, "\n#arch=win64\n" );
break;
default:
break;
}
save_subkeys( key, key, f );
}
/* save a registry branch to a file handle */
static void save_registry( struct key *key, obj_handle_t handle )
{
struct file *file;
int fd;
if (!(file = get_file_obj( current->process, handle, FILE_WRITE_DATA ))) return;
fd = dup( get_file_unix_fd( file ) );
release_object( file );
if (fd != -1)
{
FILE *f = fdopen( fd, "w" );
if (f)
{
save_all_subkeys( key, f );
if (fclose( f )) file_set_error();
}
else
{
file_set_error();
close( fd );
}
}
}
/* save a registry branch to a file */
static int save_branch( struct key *key, const char *path )
{
struct stat st;
char *p, *tmp = NULL;
int fd, count = 0, ret = 0;
FILE *f;
if (!(key->flags & KEY_DIRTY))
{
if (debug_level > 1) dump_operation( key, NULL, "Not saving clean" );
return 1;
}
/* test the file type */
if ((fd = open( path, O_WRONLY )) != -1)
{
/* if file is not a regular file or has multiple links or is accessed
* via symbolic links, write directly into it; otherwise use a temp file */
if (!lstat( path, &st ) && (!S_ISREG(st.st_mode) || st.st_nlink > 1))
{
ftruncate( fd, 0 );
goto save;
}
close( fd );
}
/* create a temp file in the same directory */
if (!(tmp = malloc( strlen(path) + 20 ))) goto done;
strcpy( tmp, path );
if ((p = strrchr( tmp, '/' ))) p++;
else p = tmp;
for (;;)
{
sprintf( p, "reg%lx%04x.tmp", (long) getpid(), count++ );
if ((fd = open( tmp, O_CREAT | O_EXCL | O_WRONLY, 0666 )) != -1) break;
if (errno != EEXIST) goto done;
close( fd );
}
/* now save to it */
save:
if (!(f = fdopen( fd, "w" )))
{
if (tmp) unlink( tmp );
close( fd );
goto done;
}
if (debug_level > 1)
{
fprintf( stderr, "%s: ", path );
dump_operation( key, NULL, "saving" );
}
save_all_subkeys( key, f );
ret = !fclose(f);
if (tmp)
{
/* if successfully written, rename to final name */
if (ret) ret = !rename( tmp, path );
if (!ret) unlink( tmp );
}
done:
free( tmp );
if (ret) make_clean( key );
return ret;
}
/* periodic saving of the registry */
static void periodic_save( void *arg )
{
int i;
if (fchdir( config_dir_fd ) == -1) return;
save_timeout_user = NULL;
for (i = 0; i < save_branch_count; i++)
save_branch( save_branch_info[i].key, save_branch_info[i].path );
if (fchdir( server_dir_fd ) == -1) fatal_error( "chdir to server dir: %s\n", strerror( errno ));
set_periodic_save_timer();
}
/* start the periodic save timer */
static void set_periodic_save_timer(void)
{
if (save_timeout_user) remove_timeout_user( save_timeout_user );
save_timeout_user = add_timeout_user( save_period, periodic_save, NULL );
}
/* save the modified registry branches to disk */
void flush_registry(void)
{
int i;
if (fchdir( config_dir_fd ) == -1) return;
for (i = 0; i < save_branch_count; i++)
{
if (!save_branch( save_branch_info[i].key, save_branch_info[i].path ))
{
fprintf( stderr, "wineserver: could not save registry branch to %s",
save_branch_info[i].path );
perror( " " );
}
}
if (fchdir( server_dir_fd ) == -1) fatal_error( "chdir to server dir: %s\n", strerror( errno ));
}
/* determine if the thread is wow64 (32-bit client running on 64-bit prefix) */
static int is_wow64_thread( struct thread *thread )
{
return (prefix_type == PREFIX_64BIT && !(CPU_FLAG(thread->process->cpu) & CPU_64BIT_MASK));
}
/* create a registry key */
DECL_HANDLER(create_key)
{
struct key *key = NULL, *parent;
struct unicode_str name, class;
unsigned int access = req->access;
const struct security_descriptor *sd;
const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, NULL );
if (!objattr) return;
if (!is_wow64_thread( current )) access = (access & ~KEY_WOW64_32KEY) | KEY_WOW64_64KEY;
class.str = get_req_data_after_objattr( objattr, &class.len );
class.len = (class.len / sizeof(WCHAR)) * sizeof(WCHAR);
if (!objattr->rootdir && name.len >= sizeof(root_name) &&
!memicmpW( name.str, root_name, sizeof(root_name)/sizeof(WCHAR) ))
{
name.str += sizeof(root_name)/sizeof(WCHAR);
name.len -= sizeof(root_name);
}
/* NOTE: no access rights are required from the parent handle to create a key */
if ((parent = get_parent_hkey_obj( objattr->rootdir )))
{
if ((key = create_key( parent, &name, &class, req->options, access,
objattr->attributes, sd, &reply->created )))
{
reply->hkey = alloc_handle( current->process, key, access, objattr->attributes );
release_object( key );
}
release_object( parent );
}
}
/* open a registry key */
DECL_HANDLER(open_key)
{
struct key *key, *parent;
struct unicode_str name;
unsigned int access = req->access;
if (!is_wow64_thread( current )) access = (access & ~KEY_WOW64_32KEY) | KEY_WOW64_64KEY;
reply->hkey = 0;
/* NOTE: no access rights are required to open the parent key, only the child key */
if ((parent = get_parent_hkey_obj( req->parent )))
{
get_req_path( &name, !req->parent );
if ((key = open_key( parent, &name, access, req->attributes )))
{
reply->hkey = alloc_handle( current->process, key, access, req->attributes );
release_object( key );
}
release_object( parent );
}
}
/* delete a registry key */
DECL_HANDLER(delete_key)
{
struct key *key;
if ((key = get_hkey_obj( req->hkey, DELETE )))
{
delete_key( key, 0);
release_object( key );
}
}
/* flush a registry key */
DECL_HANDLER(flush_key)
{
struct key *key = get_hkey_obj( req->hkey, 0 );
if (key)
{
/* we don't need to do anything here with the current implementation */
release_object( key );
}
}
/* enumerate registry subkeys */
DECL_HANDLER(enum_key)
{
struct key *key;
if ((key = get_hkey_obj( req->hkey,
req->index == -1 ? KEY_QUERY_VALUE : KEY_ENUMERATE_SUB_KEYS )))
{
enum_key( key, req->index, req->info_class, reply );
release_object( key );
}
}
/* set a value of a registry key */
DECL_HANDLER(set_key_value)
{
struct key *key;
struct unicode_str name;
if (req->namelen > get_req_data_size())
{
set_error( STATUS_INVALID_PARAMETER );
return;
}
name.str = get_req_data();
name.len = (req->namelen / sizeof(WCHAR)) * sizeof(WCHAR);
if ((key = get_hkey_obj( req->hkey, KEY_SET_VALUE )))
{
data_size_t datalen = get_req_data_size() - req->namelen;
const char *data = (const char *)get_req_data() + req->namelen;
set_value( key, &name, req->type, data, datalen );
release_object( key );
}
}
/* retrieve the value of a registry key */
DECL_HANDLER(get_key_value)
{
struct key *key;
struct unicode_str name = get_req_unicode_str();
reply->total = 0;
if ((key = get_hkey_obj( req->hkey, KEY_QUERY_VALUE )))
{
get_value( key, &name, &reply->type, &reply->total );
release_object( key );
}
}
/* enumerate the value of a registry key */
DECL_HANDLER(enum_key_value)
{
struct key *key;
if ((key = get_hkey_obj( req->hkey, KEY_QUERY_VALUE )))
{
enum_value( key, req->index, req->info_class, reply );
release_object( key );
}
}
/* delete a value of a registry key */
DECL_HANDLER(delete_key_value)
{
struct key *key;
struct unicode_str name = get_req_unicode_str();
if ((key = get_hkey_obj( req->hkey, KEY_SET_VALUE )))
{
delete_value( key, &name );
release_object( key );
}
}
/* load a registry branch from a file */
DECL_HANDLER(load_registry)
{
struct key *key, *parent;
struct unicode_str name;
const struct security_descriptor *sd;
const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, NULL );
if (!objattr) return;
if (!thread_single_check_privilege( current, &SeRestorePrivilege ))
{
set_error( STATUS_PRIVILEGE_NOT_HELD );
return;
}
if (!objattr->rootdir && name.len >= sizeof(root_name) &&
!memicmpW( name.str, root_name, sizeof(root_name)/sizeof(WCHAR) ))
{
name.str += sizeof(root_name)/sizeof(WCHAR);
name.len -= sizeof(root_name);
}
if ((parent = get_parent_hkey_obj( objattr->rootdir )))
{
int dummy;
if ((key = create_key( parent, &name, NULL, 0, KEY_WOW64_64KEY, 0, sd, &dummy )))
{
load_registry( key, req->file );
release_object( key );
}
release_object( parent );
}
}
DECL_HANDLER(unload_registry)
{
struct key *key;
if (!thread_single_check_privilege( current, &SeRestorePrivilege ))
{
set_error( STATUS_PRIVILEGE_NOT_HELD );
return;
}
if ((key = get_hkey_obj( req->hkey, 0 )))
{
delete_key( key, 1 ); /* FIXME */
release_object( key );
}
}
/* save a registry branch to a file */
DECL_HANDLER(save_registry)
{
struct key *key;
if (!thread_single_check_privilege( current, &SeBackupPrivilege ))
{
set_error( STATUS_PRIVILEGE_NOT_HELD );
return;
}
if ((key = get_hkey_obj( req->hkey, 0 )))
{
save_registry( key, req->file );
release_object( key );
}
}
/* add a registry key change notification */
DECL_HANDLER(set_registry_notification)
{
struct key *key;
struct event *event;
struct notify *notify;
key = get_hkey_obj( req->hkey, KEY_NOTIFY );
if (key)
{
event = get_event_obj( current->process, req->event, SYNCHRONIZE );
if (event)
{
notify = find_notify( key, current->process, req->hkey );
if (notify)
{
if (notify->event)
release_object( notify->event );
grab_object( event );
notify->event = event;
}
else
{
notify = mem_alloc( sizeof(*notify) );
if (notify)
{
grab_object( event );
notify->event = event;
notify->subtree = req->subtree;
notify->filter = req->filter;
notify->hkey = req->hkey;
notify->process = current->process;
list_add_head( &key->notify_list, &notify->entry );
}
}
if (notify)
{
reset_event( event );
set_error( STATUS_PENDING );
}
release_object( event );
}
release_object( key );
}
}
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