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kernelbase: Factor creating a subkey out of create_key().

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Sven Baars 2023-03-23 09:58:06 +01:00 committed by Alexandre Julliard
parent 3609508c2f
commit 899b0b82af
1 changed files with 73 additions and 52 deletions
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125
dlls/kernelbase/registry.c
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@ -227,25 +227,76 @@ static NTSTATUS open_key( HKEY *retkey, HKEY root, UNICODE_STRING *name, DWORD o
return status;
}
static NTSTATUS create_subkey( HKEY *subkey, HKEY root, UNICODE_STRING *name, DWORD options, ACCESS_MASK access,
const UNICODE_STRING *class, PULONG dispos )
{
DWORD i = 0, len = name->Length / sizeof(WCHAR);
WCHAR *buffer = name->Buffer;
OBJECT_ATTRIBUTES attr;
UNICODE_STRING str;
NTSTATUS status;
attr.Length = sizeof(attr);
attr.RootDirectory = root;
attr.ObjectName = &str;
attr.Attributes = 0;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
if (i < len && buffer[i] == '\\') return STATUS_OBJECT_PATH_INVALID;
while (i < len && buffer[i] != '\\') i++;
str.Buffer = name->Buffer;
str.Length = i * sizeof(WCHAR);
if (i == len)
{
if (options & REG_OPTION_OPEN_LINK) attr.Attributes |= OBJ_OPENLINK;
}
else
{
options &= ~REG_OPTION_CREATE_LINK;
}
status = NtCreateKey( (HANDLE *)subkey, access, &attr, 0, class, options, dispos );
if (status == STATUS_PREDEFINED_HANDLE)
{
*subkey = get_perflib_key( *subkey );
status = STATUS_SUCCESS;
}
if (!status)
{
while (i < len && buffer[i] == '\\') i++;
name->Buffer += i;
name->Length -= i * sizeof(WCHAR);
}
return status;
}
/* wrapper for NtCreateKey that creates the key recursively if necessary */
static NTSTATUS create_key( HKEY *retkey, HKEY root, UNICODE_STRING name, ULONG options, ACCESS_MASK access,
const UNICODE_STRING *class, PULONG dispos )
{
BOOL force_wow32 = is_win64 && (access & KEY_WOW64_32KEY);
NTSTATUS status = STATUS_OBJECT_NAME_NOT_FOUND;
OBJECT_ATTRIBUTES attr;
HKEY subkey;
HKEY subkey, subkey_root = root;
attr.Length = sizeof(attr);
attr.RootDirectory = root;
attr.ObjectName = &name;
attr.Attributes = 0;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
if (options & REG_OPTION_OPEN_LINK) attr.Attributes |= OBJ_OPENLINK;
*retkey = NULL;
if (!force_wow32)
if (!(is_win64 && (access & KEY_WOW64_32KEY)))
{
OBJECT_ATTRIBUTES attr;
attr.Length = sizeof(attr);
attr.RootDirectory = root;
attr.ObjectName = &name;
attr.Attributes = 0;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
if (options & REG_OPTION_OPEN_LINK) attr.Attributes |= OBJ_OPENLINK;
status = NtCreateKey( (HANDLE *)retkey, access, &attr, 0, class, options, dispos );
if (status == STATUS_PREDEFINED_HANDLE)
{
@ -257,60 +308,30 @@ static NTSTATUS create_key( HKEY *retkey, HKEY root, UNICODE_STRING name, ULONG
return status;
}
status = open_key( &subkey, root, &name, options & REG_OPTION_OPEN_LINK, access, TRUE );
status = open_key( &subkey_root, root, &name, options & REG_OPTION_OPEN_LINK, access, TRUE );
if (!status && (options & REG_OPTION_CREATE_LINK))
{
NtClose( subkey );
NtClose( subkey_root );
status = STATUS_OBJECT_NAME_COLLISION;
}
if (!status)
if (dispos) *dispos = REG_OPENED_EXISTING_KEY;
attr.RootDirectory = subkey;
if (status == STATUS_OBJECT_NAME_NOT_FOUND)
{
DWORD attrs, i, len = name.Length / sizeof(WCHAR);
WCHAR *buffer = name.Buffer;
attrs = attr.Attributes;
while (len)
status = STATUS_SUCCESS;
while (!status && name.Length)
{
i = 0;
/* don't try to create registry root */
if (!attr.RootDirectory && len > 10 && !wcsnicmp( buffer, L"\\Registry\\", 10 )) i += 10;
while (i < len && buffer[i] != '\\') i++;
name.Buffer = buffer;
name.Length = i * sizeof(WCHAR);
if (i == len)
{
attr.Attributes = attrs;
status = NtCreateKey( (HANDLE *)&subkey, access, &attr, 0, class, options, dispos );
}
else
{
attr.Attributes = attrs & ~OBJ_OPENLINK;
status = NtCreateKey( (HANDLE *)&subkey, access, &attr, 0, class,
options & ~REG_OPTION_CREATE_LINK, dispos );
}
if (attr.RootDirectory != root) NtClose( attr.RootDirectory );
if (!NT_SUCCESS(status)) return status;
attr.RootDirectory = subkey;
while (i < len && buffer[i] == '\\') i++;
buffer += i;
len -= i;
status = create_subkey( &subkey, subkey_root, &name, options, access, class, dispos );
if (subkey_root && subkey_root != root) NtClose( subkey_root );
subkey_root = subkey;
}
}
if (status == STATUS_PREDEFINED_HANDLE)
{
attr.RootDirectory = get_perflib_key( attr.RootDirectory );
status = STATUS_SUCCESS;
}
*retkey = attr.RootDirectory;
if (!status)
*retkey = subkey_root;
return status;
}