/********************************************************/

/*  ntapi: Native API core library                      */

/*  Copyright (C) 2013--2017  Z. Gilboa                 */

/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */

/********************************************************/

#include <psxtypes/psxtypes.h>

#include <ntapi/nt_object.h>

#include <ntapi/nt_guid.h>

#include <ntapi/nt_string.h>

#include <ntapi/nt_acl.h>

#include "ntapi_impl.h"

#define __SID_SYSTEM			{1,1,{{0,0,0,0,0,5}},{18}}

#define __SID_OWNER_RIGHTS		{1,1,{{0,0,0,0,0,3}},{4}}

#define __SID_AUTHENTICATED_USERS	{1,1,{{0,0,0,0,0,5}},{11}}

static const nt_sid    sid_system       = __SID_SYSTEM;

static const nt_sid    sid_owner_rights = __SID_OWNER_RIGHTS;

static const nt_sid    sid_auth_users   = __SID_AUTHENTICATED_USERS;

typedef ntapi_zw_open_directory_object objdir_open_fn;

static void __tt_guid_to_hex_utf16(

	__in	const nt_guid *	guid,

	__out	wchar16_t * 	hex_str)

{

	uint16_t key;

	__ntapi_tt_uint32_to_hex_utf16(

		guid->data1,&hex_str[0]);

	__ntapi_tt_uint16_to_hex_utf16(

		guid->data2,&hex_str[9]);

	__ntapi_tt_uint16_to_hex_utf16(

		guid->data3,&hex_str[14]);

	key = guid->data4[0] * 0x100 + guid->data4[1];

	__ntapi_tt_uint16_to_hex_utf16(

		key,&hex_str[19]);

	key = guid->data4[2] * 0x100 + guid->data4[3];

	__ntapi_tt_uint16_to_hex_utf16(

		key,&hex_str[24]);

	key = guid->data4[4] * 0x100 + guid->data4[5];

	__ntapi_tt_uint16_to_hex_utf16(

		key,&hex_str[28]);

	key = guid->data4[6] * 0x100 + guid->data4[7];

	__ntapi_tt_uint16_to_hex_utf16(

		key,&hex_str[32]);

	hex_str[8]  = '-';

	hex_str[13] = '-';

	hex_str[18] = '-';

	hex_str[23] = '-';

}

static nt_access_allowed_ace * __ipc_ace_init(

	nt_access_allowed_ace * ace,

	uint32_t		mask,

	const nt_sid *		sid)

{

	ace->mask             = mask;

	ace->header.ace_type  = NT_ACE_TYPE_ACCESS_ALLOWED;

	ace->header.ace_flags = 0;

	ace->header.ace_size  = sizeof(uint32_t) * sid->sub_authority_count

	                        + __offsetof(nt_access_allowed_ace,sid_start)

	                        + __offsetof(nt_sid,sub_authority);

	__ntapi->tt_sid_copy(

		(nt_sid *)&ace->sid_start,

		sid);

	return (nt_access_allowed_ace *)((size_t)ace + ace->header.ace_size);

}

static void __ipc_sd_init(nt_sd_common_buffer * sd, int fdir)

{

	nt_access_allowed_ace * ace;

	uint32_t		mask_system;

	uint32_t		mask_owner;

	uint32_t		mask_other;

	/* access mask */

	if (fdir) {

		mask_system = NT_SEC_READ_CONTROL

				| NT_DIRECTORY_QUERY

				| NT_DIRECTORY_TRAVERSE

				| NT_DIRECTORY_CREATE_OBJECT

				| NT_DIRECTORY_CREATE_SUBDIRECTORY;

		mask_owner  = NT_DIRECTORY_ALL_ACCESS;

		mask_other  = mask_system;

	} else {

		mask_system = NT_SYMBOLIC_LINK_ALL_ACCESS;

		mask_owner  = NT_SYMBOLIC_LINK_ALL_ACCESS;

		mask_other  = NT_SYMBOLIC_LINK_ALL_ACCESS;

	}

	/* sd header */

	sd->sd.revision         = 1;

	sd->sd.sbz_1st          = 0;

	sd->sd.control          = NT_SE_SELF_RELATIVE | NT_SE_DACL_PRESENT;

	sd->sd.offset_owner     = __offsetof(nt_sd_common_buffer,owner);

	sd->sd.offset_group     = 0;

	sd->sd.offset_dacl      = __offsetof(nt_sd_common_buffer,dacl);

	sd->sd.offset_sacl      = 0;

	/* owner sid */

	__ntapi->tt_sid_copy(

		(nt_sid *)&sd->owner,

		__ntapi_internals()->user);

	/* ace's for LOCAL_SYSTEM, AUTHENTICATED_USERS, and process token user */

	ace = (nt_access_allowed_ace *)&sd->buffer;

	ace = __ipc_ace_init(ace,mask_system,&sid_system);

	ace = __ipc_ace_init(ace,mask_other,&sid_auth_users);

	ace = __ipc_ace_init(ace,mask_owner,&sid_owner_rights);

	ace = __ipc_ace_init(ace,mask_owner,(nt_sid *)&sd->owner);

	sd->dacl.acl_revision   = 0x02;

	sd->dacl.sbz_1st        = 0;

	sd->dacl.acl_size       = (uint16_t)((char *)ace - (char *)&sd->dacl);

	sd->dacl.ace_count      = 3;

	sd->dacl.sbz_2nd        = 0;

}

static int32_t __stdcall __tt_create_ipc_object_directory(

	__out	void **			hdir,

	__in	uint32_t		desired_access,

	__in	const wchar16_t		prefix[6],

	__in	const nt_guid *		guid)

{

	int32_t			status;

	nt_ipc_objdir_name	objdir_name;

	nt_unicode_string	name;

	nt_sd_common_buffer	sd;

	nt_oa			oa;

	nt_sqos			sqos = {

					sizeof(sqos),

					NT_SECURITY_IMPERSONATION,

					NT_SECURITY_TRACKING_DYNAMIC,

					1};

	__ipc_sd_init(&sd,1);

	__ntapi->tt_generic_memcpy(

		objdir_name.base_named_objects,

		(wchar16_t[])__NT_BASED_NAMED_OBJECTS,

		sizeof(objdir_name.base_named_objects));

	__ntapi->tt_memcpy_utf16(

		objdir_name.prefix,

		prefix,

		sizeof(objdir_name.prefix));

	__tt_guid_to_hex_utf16(

		guid,objdir_name.guid);

	objdir_name.backslash = '\\';

	objdir_name.uscore    = '_';

	name.strlen	= sizeof(objdir_name);

	name.maxlen	= 0;

	name.buffer	= objdir_name.base_named_objects;

	oa.len		= sizeof(oa);

	oa.root_dir	= 0;

	oa.obj_name	= &nam;;

	oa.obj_attr	= NT_OBJ_INHERIT

			  | NT_OBJ_OPENIF

			  | NT_OBJ_CASE_INSENSITIVE;

	oa.sec_desc	= &sd.sd;

	oa.sec_qos	= &sqo;;

	status = __ntapi->zw_create_directory_object(

		hdir,desired_access,&oa);

	return (status == NT_STATUS_OBJECT_NAME_EXISTS)

		? NT_STATUS_SUCCESS

		: status;

}

static int32_t __stdcall __tt_create_keyed_object_directory(

	__out	void **			hdir,

	__in	uint32_t		desired_access,

	__in	void *			hparent,

	__in	uint32_t		key,

	__in	objdir_open_fn *	openfn)

{

	wchar16_t		keystr[8];

	nt_unicode_string	name;

	nt_sd_common_buffer	sd;

	nt_oa			oa;

	nt_sqos			sqos = {

					sizeof(sqos),

					NT_SECURITY_IMPERSONATION,

					NT_SECURITY_TRACKING_DYNAMIC,

					1};

	__ipc_sd_init(&sd,1);

	__ntapi->tt_uint32_to_hex_utf16(

		key,keystr);

	name.strlen = sizeof(keystr);

	name.maxlen = 0;

	name.buffer = keystr;

	oa.len		= sizeof(oa);

	oa.root_dir	= hparent;

	oa.obj_name	= &nam;;

	oa.obj_attr	= NT_OBJ_INHERIT;

	oa.sec_desc	= &sd.sd;

	oa.sec_qos	= &sqo;;

	return openfn(hdir,desired_access,&oa);

}

static int32_t __stdcall __tt_create_object_directory_entry(

	__out	void **			hentry,

	__in	uint32_t		desired_access,

	__in	void *			hdir,

	__in	void *			htarget,

	__in	nt_unicode_string *	target_name,

	__in	uint32_t		key)

{

	int32_t			status;

	nt_oa			oa;

	nt_unicode_string	name;

	nt_sd_common_buffer	sd;

	wchar16_t		keystr[8];

	uintptr_t		buffer[2048/sizeof(uintptr_t)];

	nt_sqos			sqos = {

					sizeof(sqos),

					NT_SECURITY_IMPERSONATION,

					NT_SECURITY_TRACKING_DYNAMIC,

					1};

	if (!target_name) {

		if ((status = __ntapi->zw_query_object(

				htarget,

				NT_OBJECT_NAME_INFORMATION,

				buffer,sizeof(buffer),0)))

			return status;

		target_name = (nt_unicode_string *)buffer;

	}

	__ipc_sd_init(&sd,0);

	__ntapi->tt_uint32_to_hex_utf16(key,keystr);

	name.strlen = sizeof(keystr);

	name.maxlen = 0;

	name.buffer = keystr;

	oa.len		= sizeof(oa);

	oa.root_dir	= hdir;

	oa.obj_name	= &nam;;

	oa.obj_attr	= 0;

	oa.sec_desc	= &sd.sd;

	oa.sec_qos	= &sqo;;

	return __ntapi->zw_create_symbolic_link_object(

		hentry,

		desired_access,

		&oa,target_name);

}

int32_t __stdcall __ntapi_tt_open_ipc_object_directory(

	__out	void **			hdir,

	__in	uint32_t		desired_access,

	__in	const wchar16_t		prefix[6],

	__in	const nt_guid *		guid)

{

	return __tt_create_ipc_object_directory(

		hdir,desired_access,

		prefix,guid);

}

int32_t __stdcall __ntapi_tt_create_ipc_object_directory_entry(

	__out	void **			hentry,

	__in	uint32_t		desired_access,

	__in	void *			hdir,

	__in	void *			htarget,

	__in	nt_unicode_string *	target_name,

	__in	uint32_t		key)

{

	return __tt_create_object_directory_entry(

		hentry,desired_access,

		hdir,htarget,target_name,key);

}

int32_t __stdcall __ntapi_tt_open_dev_object_directory(

	__out	void **			hdir,

	__in	uint32_t		desired_access,

	__in	const wchar16_t		prefix[6],

	__in	const nt_guid *		ipc_guid)

{

	return __tt_create_ipc_object_directory(

		hdir,desired_access,

		prefix,ipc_guid);

}

int32_t __stdcall __ntapi_tt_create_dev_object_directory_entry(

	__out	void **			hentry,

	__in	uint32_t		desired_access,

	__in	void *			hdir,

	__in	void *			htarget,

	__in	nt_unicode_string *	target_name,

	__in	const nt_guid *		dev_guid)

{

	int32_t			status;

	nt_oa			oa;

	nt_unicode_string	name;

	nt_sd_common_buffer	sd;

	nt_guid_str_utf16	guidstr;

	uintptr_t		buffer[2048/sizeof(uintptr_t)];

	nt_sqos			sqos = {

					sizeof(sqos),

					NT_SECURITY_IMPERSONATION,

					NT_SECURITY_TRACKING_DYNAMIC,

					1};

	if (!target_name) {

		if ((status = __ntapi->zw_query_object(

				htarget,

				NT_OBJECT_NAME_INFORMATION,

				buffer,sizeof(buffer),0)))

			return status;

		target_name = (nt_unicode_string *)buffer;

	}

	__ipc_sd_init(&sd,0);

	__ntapi->tt_guid_to_string_utf16(dev_guid,&guidstr);

	name.strlen = sizeof(guidstr);

	name.maxlen = 0;

	name.buffer = &guidstr.lbrace;

	oa.len		= sizeof(oa);

	oa.root_dir	= hdir;

	oa.obj_name	= &nam;;

	oa.obj_attr	= 0;

	oa.sec_desc	= &sd.sd;

	oa.sec_qos	= &sqo;;

	return __ntapi->zw_create_symbolic_link_object(

		hentry,

		desired_access,

		&oa,target_name);

}

int32_t __stdcall __ntapi_tt_create_keyed_object_directory(

	__out	void **			hdir,

	__in	uint32_t		desired_access,

	__in	void *			hparent,

	__in	uint32_t		key)

{

	return __tt_create_keyed_object_directory(

		hdir,desired_access,

		hparent,key,

		__ntapi->zw_create_directory_object);

}

int32_t __stdcall __ntapi_tt_open_keyed_object_directory(

	__out	void **			hdir,

	__in	uint32_t		desired_access,

	__in	void *			hparent,

	__in	uint32_t		key)

{

	return __tt_create_keyed_object_directory(

		hdir,desired_access,

		hparent,key,

		__ntapi->zw_open_directory_object);

}

int32_t __stdcall __ntapi_tt_create_keyed_object_directory_entry(

	__out	void **			hentry,

	__in	uint32_t		desired_access,

	__in	void *			hdir,

	__in	void *			htarget,

	__in	nt_unicode_string *	target_name,

	__in	uint32_t		key)

{

	return __tt_create_object_directory_entry(

		hentry,desired_access,

		hdir,htarget,target_name,key);

}

int32_t __stdcall __ntapi_tt_keyed_object_to_key(

	__in	void *			hentry,

	__out	uint32_t *		key,

	__out	void *			buffer,

	__in	size_t			buflen)

{

	int32_t			status;

	wchar16_t *		pidname;

	nt_unicode_string *	dirname;

	if ((status = __ntapi->zw_query_object(

			hentry,

			NT_OBJECT_NAME_INFORMATION,

			buffer,buflen,

			&(uint32_t){0})))

		return status;

	dirname = (nt_unicode_string *)buffer;

	pidname = dirname->buffer;

	if (dirname->strlen <= 8 * sizeof(wchar16_t))

		return NT_STATUS_INTERNAL_ERROR;

	pidname += dirname->strlen / sizeof(wchar16_t);

	pidname -= 8;

	if (pidname[-1] != '\\')

		return NT_STATUS_INVALID_PARAMETER;

	return __ntapi->tt_hex_utf16_to_uint32(

		pidname,key);

}