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

/*  ntapi: Native API core library                      */

/*  Copyright (C) 2013--2021  SysDeer Technologies, LLC */

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

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

#include <psxtypes/psxtypes.h>

#include <pemagine/pemagine.h>

#include <ntapi/nt_status.h>

#include <ntapi/nt_object.h>

#include <ntapi/nt_thread.h>

#include <ntapi/nt_process.h>

#include <ntapi/nt_string.h>

#include <ntapi/ntapi.h>

#include "ntapi_impl.h"

struct __integral_cmdline {

	struct pe_guid_str_utf16	guid;

	wchar16_t			space1;

	wchar16_t			rarg[2];

	wchar16_t			space2;

	wchar16_t			addr[2*__SIZEOF_POINTER__];

	wchar16_t			null;

};

static int32_t __tt_create_process_cancel(nt_create_process_params * params, void * hsection, int32_t status)

{

	if (params->hprocess) {

		__ntapi->zw_terminate_process(params->hprocess,NT_STATUS_INTERNAL_ERROR);

		__ntapi->zw_close(params->hprocess);

	}

	if (params->hthread)

		__ntapi->zw_close(params->hthread);

	if (hsection)

		__ntapi->zw_close(hsection);

	return status;

}

int32_t __stdcall __ntapi_tt_create_native_process_v1(nt_create_process_params * params)

{

	int32_t				status;

	void *				hfile;

	void *				hsection;

	nt_object_attributes		oa_file;

	nt_object_attributes		oa_process;

	nt_object_attributes		oa_thread;

	nt_unicode_string		nt_image;

	nt_unicode_string		nt_cmd_line;

	nt_process_parameters *		rprocess_params;

	nt_thread_params		tparams;

	nt_io_status_block		iosb;

	nt_section_image_information	sii;

	int				fresume_thread;

	struct __integral_cmdline	fcmdline = {

		{

			'{',{'3','e','4','3','e','c','8','4'},

			'-',{'1','a','f','1'},

			'-',{'4','e','d','e'},

			'-',{'a','c','d','8'},

			'-',{'c','3','d','9','2','0','a','f','c','8','6','8'},

			'}'

		},

	#if (__SIZEOF_POINTER__ == 4)

		' ',{'-','r'},' ',

		{'i','n','t','e','g','r','a','l'},0};

	#elif (__SIZEOF_POINTER__ == 8)

		' ',{'-','r'},' ',

		{'i','n','t','e','g','r','a','l',

		'-','r','u','n','t','i','m','e'},0};

	#endif

	/* validation */

	if (params->cmd_line && params->process_params)

		return NT_STATUS_INVALID_PARAMETER_MIX;

	else if (params->cmd_line && params->rtblock)

		return NT_STATUS_INVALID_PARAMETER_MIX;

	else if (params->environment && params->process_params)

		return NT_STATUS_INVALID_PARAMETER_MIX;

	/* tparams */

	__ntapi->tt_aligned_block_memset(

		&tparams, 0, sizeof(tparams));

	/* image_name */

	__ntapi->rtl_init_unicode_string(

		&nt_image,

		params->image_name);

	/* oa_process */

	if (!params->obj_attr_process) {

		__ntapi->tt_aligned_block_memset(

			&oa_process,0,sizeof(oa_process));

		oa_process.len = sizeof(oa_process);

		params->obj_attr_process = &oa_process;

	}

	/* oa_thread */

	if (!params->obj_attr_thread) {

		__ntapi->tt_aligned_block_memset(

			&oa_thread,0,sizeof(oa_thread));

		oa_thread.len = sizeof(oa_thread);

		params->obj_attr_thread = &oa_thread;

	}

	/* legacy tasks */

        /* init the oa_file structure */

	oa_file.len		= sizeof(nt_object_attributes);

	oa_file.root_dir	= (void *)0;

	oa_file.obj_name	= &nt_image;

	oa_file.obj_attr	= 0;

	oa_file.sec_desc	= (nt_security_descriptor *)0;

	oa_file.sec_qos		= (nt_sqos *)0;

	/* open the file */

	if ((status = __ntapi->zw_open_file(

			&hfile,

			NT_FILE_EXECUTE | NT_PROCESS_SYNCHRONIZE,

			&oa_file,

			&iosb,

			NT_FILE_SHARE_READ,

			NT_FILE_SYNCHRONOUS_IO_NONALERT)))

		return status;

	/* create the executable section */

	hsection	 = 0;

	oa_file.obj_name = 0;

	status = __ntapi->zw_create_section(

		&hsection,

		NT_SECTION_ALL_ACCESS,

		&oa_file,0,

		NT_PAGE_EXECUTE,

		NT_SEC_IMAGE,

		hfile);

	__ntapi->zw_close(hfile);

	if (status) return status;

	/* create the process */

	if ((status = __ntapi->zw_create_process(

			&params->hprocess,

			NT_PROCESS_ALL_ACCESS,

			&oa_process,

			NT_CURRENT_PROCESS_HANDLE,

			1,hsection,0,0)))

		return __tt_create_process_cancel(params,hsection,status);

	/* obtain stack/heap and entry point information */

	if ((status = __ntapi->zw_query_section(

			hsection,

			NT_SECTION_IMAGE_INFORMATION,

			&sii,sizeof(sii),0)))

		return __tt_create_process_cancel(params,hsection,status);

	/* obtain process information */

	if ((status = __ntapi->zw_query_information_process(

			tparams.hprocess,

			NT_PROCESS_BASIC_INFORMATION,

			&params->pbi,sizeof(params->pbi),

			0)))

		return __tt_create_process_cancel(params,hsection,status);

	/* create remote process parameters block */

	if (!params->process_params) {

		/* environment */

		if (!params->environment)

			params->environment = __ntapi->tt_get_peb_env_block_utf16();

		/* cmd_line */

		if (params->rtblock) {

			nt_cmd_line.strlen = sizeof(fcmdline) - sizeof(fcmdline.null);

			nt_cmd_line.maxlen = sizeof(fcmdline);

			nt_cmd_line.buffer = &fcmdline.guid.lbrace;

			params->cmd_line   = &fcmdline.guid.lbrace;

		} else {

			if (!params->cmd_line)

				params->cmd_line = params->image_name;

			__ntapi->rtl_init_unicode_string(

				&nt_cmd_line,

				params->cmd_line);

		}

	}

	fresume_thread = (params->creation_flags_thread ^ 0x01) & 0x01;

	/* create target thread */

	tparams.hprocess		= params->hprocess;

	tparams.start			= (nt_thread_start_routine *)sii.entry_point;

	tparams.obj_attr		= &oa_thread;

	tparams.creation_flags		= NT_CREATE_SUSPENDED | NT_CREATE_FIRST_THREAD_OF_PROCESS;

	tparams.stack_size_commit	= sii.stack_commit;

	tparams.stack_size_reserve	= sii.stack_reserve;

	if ((status = __ntapi->tt_create_remote_thread(&tparams)))

		return __tt_create_process_cancel(params,hsection,status);

	/* remote process params */

	if ((status = __ntapi->tt_create_remote_process_params(

			tparams.hprocess,

			&rprocess_params,

			&nt_image,

			(nt_unicode_string *)0,

			(nt_unicode_string *)0,

			&nt_cmd_line,

			params->environment,

			(nt_unicode_string *)0,

			(nt_unicode_string *)0,

			(nt_unicode_string *)0,

			(nt_unicode_string *)0)))

		return __tt_create_process_cancel(params,hsection,status);

	/* session registration */

	if (params->hsession && (params->hsession != NT_INVALID_HANDLE_VALUE))

		if ((status = __ntapi->tty_client_process_register(

				params->hsession,

				params->pbi.unique_process_id,

				0,0,0)))

			return __tt_create_process_cancel(params,hsection,status);

	/* update the target process environment block: */

	/* make process_params point to rparams_block   */

	if ((status = __ntapi->zw_write_virtual_memory(

			tparams.hprocess,

			(char *)((uintptr_t)params->pbi.peb_base_address

				+ (uintptr_t)&(((nt_peb *)0)->process_params)),

			(char *)&rprocess_params,

			sizeof(uintptr_t),0)))

		return __tt_create_process_cancel(params,hsection,status);

	/* rtdata */

	if (params->rtblock && (status = __ntapi_tt_create_remote_runtime_data(tparams.hprocess,params->rtblock)))

		return __tt_create_process_cancel(params,hsection,status);

	if (fresume_thread && (status = __ntapi->zw_resume_thread(tparams.hthread,0)))

		return __tt_create_process_cancel(params,hsection,status);

	/* all done */

	params->hthread		= tparams.hthread;

	params->cid.process_id	= params->pbi.unique_process_id;

	params->cid.thread_id	= tparams.cid.thread_id;

	return status;

}