path: root/sys/linux/dev_trusty.txt

# Copyright 2018 syzkaller project authors. All rights reserved.
# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.

# Trusty IPC device (https://android.googlesource.com/kernel/common android-trusty-4.9).

include <linux/ioctl.h>
include <linux/fcntl.h>

resource fd_trusty[fd]

openat$trusty(fd const[AT_FDCWD], file ptr[in, string["/dev/trusty-ipc-dev0"]], flags flags[trusty_open_flags], mode const[0]) fd_trusty
ioctl$TIPC_IOC_CONNECT(fd fd_trusty, cmd const[TIPC_IOC_CONNECT], arg ptr[in, string[trusty_ports]])
write$trusty(fd fd_trusty, msg ptr[in, array[int8]], len len[msg])
read$trusty(fd fd_trusty, msg ptr[out, array[int8]], len len[msg])

# TODO: describe interface for the rest of ports.
trusty_ports = "com.android.trusty.gatekeeper", "com.android.trusty.keymaster", "com.android.trusty.keymaster.secure", "com.android.trusty.avb", "com.android.trusty.hwkey", "com.android.trusty.hwrng", "com.android.trusty.appmgmt.srv2.start", trusty_storage_ports

trusty_open_flags = O_RDWR, O_RDWR_NONBLOCK

define O_RDWR_NONBLOCK	O_RDWR | O_NONBLOCK

# This is not defined in any kernel header.
define TIPC_IOC_CONNECT	_IOW('r', 0x80, char*)

define TRUSTY_ERROR_NONE	0
define TRUSTY_ERROR_INVALID	1
define TRUSTY_ERROR_RETRY	2
define TRUSTY_ERROR_UNKNOWN	3

### gatekeeper ###

resource fd_trusty_gatekeeper[fd_trusty]

openat$trusty_gatekeeper(fd const[AT_FDCWD], file ptr[in, string["/dev/trusty-ipc-dev0"]], flags flags[trusty_open_flags], mode const[0]) fd_trusty_gatekeeper
ioctl$TIPC_IOC_CONNECT_gatekeeper(fd fd_trusty_gatekeeper, cmd const[TIPC_IOC_CONNECT], arg ptr[in, string["com.android.trusty.gatekeeper"]])
write$trusty_gatekeeper(fd fd_trusty_gatekeeper, msg ptr[in, trusty_gatekeeper_msg], len len[msg])

trusty_gatekeeper_msg [
	err	trusty_gatekeeper_error
	retry	trusty_gatekeeper_retry
	enroll	trusty_gatekeeper_enroll
	verify	trusty_gatekeeper_verify
] [varlen]

trusty_gatekeeper_error {
	cmd	flags[trusty_gatekeeper_cmd, int32]
	error	const[TRUSTY_ERROR_INVALID, int32]
	user_id	const[0, int32]
}

trusty_gatekeeper_retry {
	cmd		flags[trusty_gatekeeper_cmd, int32]
	error		const[TRUSTY_ERROR_RETRY, int32]
	user_id		const[0, int32]
	retry_timeout	int32
}

trusty_gatekeeper_enroll {
	cmd			const[TRUSTY_GK_ENROLL, int32]
	error			const[TRUSTY_ERROR_NONE, int32]
	user_id			trusty_gatekeeper_user_id
	provided_password	trusty_blob
	enrolled_password	trusty_blob
	password_handle_len	bytesize[password_handle, int32]
	password_handle		trusty_password_handle
} [packed]

trusty_gatekeeper_verify {
	cmd			const[TRUSTY_GK_VERIFY, int32]
	error			const[TRUSTY_ERROR_NONE, int32]
	user_id			trusty_gatekeeper_user_id
	challenge		int64
	password_handle		trusty_blob
	provided_password	trusty_blob
} [packed]

trusty_password_handle {
	version		int8[0:2]
	user_id		int64
	flags		bool64
	salt		int64
	signature	array[int8, 32]
	hardware_backed	bool8
} [packed]

trusty_blob {
	len	bytesize[data, int32]
	data	array[int8]
} [packed]

type trusty_gatekeeper_user_id int32[0:4]

trusty_gatekeeper_cmd = TRUSTY_GK_ENROLL, TRUSTY_GK_VERIFY

define TRUSTY_GK_ENROLL	0
define TRUSTY_GK_VERIFY	2

### keymaster.secure ###

resource fd_trusty_km_secure[fd_trusty]

openat$trusty_km_secure(fd const[AT_FDCWD], file ptr[in, string["/dev/trusty-ipc-dev0"]], flags flags[trusty_open_flags], mode const[0]) fd_trusty_km_secure
ioctl$TIPC_IOC_CONNECT_keymaster_secure(fd fd_trusty_km_secure, cmd const[TIPC_IOC_CONNECT], arg ptr[in, string["com.android.trusty.keymaster.secure"]])
write$trusty_km_secure(fd fd_trusty_km_secure, msg ptr[in, trusty_km_secure_msg], len len[msg])

trusty_km_secure_msg {
	cmd	const[TRUSTY_KM_GET_AUTH_TOKEN_KEY, int32]
}

define TRUSTY_KM_GET_AUTH_TOKEN_KEY	0

### keymaster ###

resource fd_trusty_km[fd_trusty]

openat$trusty_km(fd const[AT_FDCWD], file ptr[in, string["/dev/trusty-ipc-dev0"]], flags flags[trusty_open_flags], mode const[0]) fd_trusty_km
ioctl$TIPC_IOC_CONNECT_km(fd fd_trusty_km, cmd const[TIPC_IOC_CONNECT], arg ptr[in, string["com.android.trusty.keymaster"]])
write$trusty_km(fd fd_trusty_km, msg ptr[in, trusty_km_msg], len len[msg])

trusty_km_msg [
	GENERATE_KEY			trusty_km_msg_t[TRUSTY_KM_GENERATE_KEY, trusty_authorization_set]
	BEGIN_OPERATION			trusty_km_msg_t[TRUSTY_KM_BEGIN_OPERATION, trusty_km_begin_operation]
	UPDATE_OPERATION		trusty_km_msg_t[TRUSTY_KM_UPDATE_OPERATION, trusty_km_update_operation]
	FINISH_OPERATION		trusty_km_msg_t[TRUSTY_KM_FINISH_OPERATION, trusty_km_finish_operation]
	ABORT_OPERATION			trusty_km_msg_t[TRUSTY_KM_ABORT_OPERATION, int64]
	IMPORT_KEY			trusty_km_msg_t[TRUSTY_KM_IMPORT_KEY, trusty_km_import_key]
	EXPORT_KEY			trusty_km_msg_t[TRUSTY_KM_EXPORT_KEY, trusty_km_export_key]
	GET_VERSION			trusty_km_msg_t[TRUSTY_KM_GET_VERSION, void]
	ADD_RNG_ENTROPY			trusty_km_msg_t[TRUSTY_KM_ADD_RNG_ENTROPY, trusty_blob]
	GET_SUPPORTED_ALGORITHMS	trusty_km_msg_t[TRUSTY_KM_GET_SUPPORTED_ALGORITHMS, void]
	GET_SUPPORTED_BLOCK_MODES	trusty_km_msg_t[TRUSTY_KM_GET_SUPPORTED_BLOCK_MODES, trusty_km_supported_digests]
	GET_SUPPORTED_PADDING_MODES	trusty_km_msg_t[TRUSTY_KM_GET_SUPPORTED_PADDING_MODES, trusty_km_supported_digests]
	GET_SUPPORTED_DIGESTS		trusty_km_msg_t[TRUSTY_KM_GET_SUPPORTED_DIGESTS, trusty_km_supported_digests]
	GET_SUPPORTED_IMPORT_FORMATS	trusty_km_msg_t[TRUSTY_KM_GET_SUPPORTED_IMPORT_FORMATS, flags[trusty_km_algorithms, int32]]
	GET_SUPPORTED_EXPORT_FORMATS	trusty_km_msg_t[TRUSTY_KM_GET_SUPPORTED_EXPORT_FORMATS, flags[trusty_km_algorithms, int32]]
	GET_KEY_CHARACTERISTICS		trusty_km_msg_t[TRUSTY_KM_GET_KEY_CHARACTERISTICS, trusty_km_get_key_characteristics]
	ATTEST_KEY			trusty_km_msg_t[TRUSTY_KM_ATTEST_KEY, trusty_km_attest_key]
	UPGRADE_KEY			trusty_km_msg_t[TRUSTY_KM_UPGRADE_KEY, trusty_km_attest_key]
	CONFIGURE			trusty_km_msg_t[TRUSTY_KM_CONFIGURE, trusty_km_configure]
	GET_HMAC_SHARING_PARAMETERS	trusty_km_msg_t[TRUSTY_KM_GET_HMAC_SHARING_PARAMETERS, void]
	COMPUTE_SHARED_HMAC		trusty_km_msg_t[TRUSTY_KM_COMPUTE_SHARED_HMAC, trusty_km_hmac_sharing_parameters_array]
	VERIFY_AUTHORIZATION		trusty_km_msg_t[TRUSTY_KM_VERIFY_AUTHORIZATION, trusty_km_verify_authorization]
	DELETE_KEY			trusty_km_msg_t[TRUSTY_KM_DELETE_KEY, trusty_blob]
	DELETE_ALL_KEYS			trusty_km_msg_t[TRUSTY_KM_DELETE_ALL_KEYS, void]
# TODO: is DESTROY_ATTESTATION_IDS a thing? Where is it handled?
	IMPORT_WRAPPED_KEY		trusty_km_msg_t[TRUSTY_KM_IMPORT_WRAPPED_KEY, trusty_km_import_wrapped_key]
] [varlen]

type trusty_km_msg_t[CMD, PAYLOAD] {
	cmd	const[CMD, int32]
	payload	PAYLOAD
} [packed]

trusty_km_begin_operation {
	purpose			int32
	key			trusty_blob
	additional_params	trusty_authorization_set
} [packed]

trusty_km_update_operation {
	handle			int64
	input			trusty_blob
	additional_params	trusty_authorization_set
} [packed]

trusty_km_finish_operation {
	handle			int64
	signature		trusty_blob
	additional_params	trusty_authorization_set
	input			trusty_blob
} [packed]

trusty_km_import_key {
	key_description	trusty_authorization_set
	key_format	flags[trusty_km_key_format, int32]
	key_material	trusty_blob
} [packed]

trusty_km_key_format = 0, 1, 3

trusty_km_export_key {
	key_description	trusty_authorization_set
	key_format	flags[trusty_km_key_format, int32]
	key_material	trusty_blob
} [packed]

trusty_km_supported_digests {
	algorithm	flags[trusty_km_algorithms, int32]
	purpose		flags[trusty_km_purposes, int32]
} [packed]

trusty_km_algorithms = 1, 2, 3, 32, 33, 128
trusty_km_purposes = 0, 1, 2, 3, 4, 5

trusty_km_get_key_characteristics {
	key_blob		trusty_blob
	additional_params	trusty_authorization_set
} [packed]

trusty_km_attest_key {
	key_blob	trusty_blob
	attest_params	trusty_authorization_set
} [packed]

trusty_km_configure {
	os_version	int32
	os_patchlevel	int32
} [packed]

trusty_km_hmac_sharing_parameters_array {
	num_params	len[params, int32]
	params		array[trusty_km_hmac_sharing_parameter]
} [packed]

trusty_km_hmac_sharing_parameter {
	seed	trusty_blob
	none	array[int8, 32]
} [packed]

trusty_km_verify_authorization {
	challenge		int64
	parameters_to_verify	trusty_authorization_set
	auth_token		trusty_km_hardware_auth_token
} [packed]

trusty_km_hardware_auth_token {
	challenge		int64
	user_id			int64
	authenticator_id	int64
	authenticator_type	int32
	timestamp		int64
	mac			trusty_blob
} [packed]

trusty_km_import_wrapped_key {
	wrapped_key		trusty_blob
	wrapping_key		trusty_blob
	masking_key		trusty_blob
	additional_params	trusty_authorization_set
	password_sid		int64
	biometric_sid		int64
} [packed]

trusty_authorization_set {
	indirect_data	trusty_blob
	elements_count	len[elements, int32]
	elements_size	bytesize[elements, int32]
	elements	array[trusty_authorization_elem]
} [packed]

trusty_authorization_elem [
	ENUM		trusty_authorization_elem_t[TRUSTY_KM_ENUM, int32]
	ENUM_REP	trusty_authorization_elem_t[TRUSTY_KM_ENUM_REP, int32]
	UINT		trusty_authorization_elem_t[TRUSTY_KM_UINT, int32]
	UINT_REP	trusty_authorization_elem_t[TRUSTY_KM_UINT_REP, int32]
	ULONG		trusty_authorization_elem_t[TRUSTY_KM_ULONG, int64]
	ULONG_REP	trusty_authorization_elem_t[TRUSTY_KM_ULONG_REP, int64]
	DATE		trusty_authorization_elem_t[TRUSTY_KM_DATE, int64]
	BOOL		trusty_authorization_elem_t[TRUSTY_KM_BOOL, bool8]
	BIGNUM		trusty_authorization_elem_t[TRUSTY_KM_BIGNUM, trusty_authorization_bytes]
	BYTES		trusty_authorization_elem_t[TRUSTY_KM_BYTES, trusty_authorization_bytes]
] [varlen]

type trusty_authorization_elem_t[TAG, DATA] {
	tag	const[TAG, int32]
	data	DATA
} [packed]

trusty_authorization_bytes {
# NEED: these are length/offset in trusty_authorization_set.indirect_data.
	data_length	int32
	offset		int32
} [packed]

define TRUSTY_KM_REQ_SHIFT	2
define TRUSTY_KM_GENERATE_KEY	0 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_BEGIN_OPERATION	1 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_UPDATE_OPERATION	2 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_FINISH_OPERATION	3 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_ABORT_OPERATION	4 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_IMPORT_KEY	5 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_EXPORT_KEY	6 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_GET_VERSION	7 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_ADD_RNG_ENTROPY	8 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_GET_SUPPORTED_ALGORITHMS	9 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_GET_SUPPORTED_BLOCK_MODES	10 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_GET_SUPPORTED_PADDING_MODES	11 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_GET_SUPPORTED_DIGESTS	12 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_GET_SUPPORTED_IMPORT_FORMATS	13 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_GET_SUPPORTED_EXPORT_FORMATS	14 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_GET_KEY_CHARACTERISTICS	15 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_ATTEST_KEY	16 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_UPGRADE_KEY	17 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_CONFIGURE	18 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_GET_HMAC_SHARING_PARAMETERS	19 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_COMPUTE_SHARED_HMAC	20 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_VERIFY_AUTHORIZATION	21 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_DELETE_KEY	22 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_DELETE_ALL_KEYS	23 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_DESTROY_ATTESTATION_IDS	24 << TRUSTY_KM_REQ_SHIFT
define TRUSTY_KM_IMPORT_WRAPPED_KEY	25 << TRUSTY_KM_REQ_SHIFT

define TRUSTY_KM_ENUM	1 << 28
define TRUSTY_KM_ENUM_REP	2 << 28
define TRUSTY_KM_UINT	3 << 28
define TRUSTY_KM_UINT_REP	4 << 28
define TRUSTY_KM_ULONG	5 << 28
define TRUSTY_KM_DATE	6 << 28
define TRUSTY_KM_BOOL	7 << 28
define TRUSTY_KM_BIGNUM	8 << 28
define TRUSTY_KM_BYTES	9 << 28
define TRUSTY_KM_ULONG_REP	10 << 28

# TODO: does it make sense to exercise bootloader commands?
# They should be locked when Linux starts and we probably trust bootloader anyway?

### avb ###

resource fd_trusty_avb[fd_trusty]

openat$trusty_avb(fd const[AT_FDCWD], file ptr[in, string["/dev/trusty-ipc-dev0"]], flags flags[trusty_open_flags], mode const[0]) fd_trusty_avb
ioctl$TIPC_IOC_CONNECT_avb(fd fd_trusty_avb, cmd const[TIPC_IOC_CONNECT], arg ptr[in, string["com.android.trusty.avb"]])
write$trusty_avb(fd fd_trusty_avb, msg ptr[in, trusty_avb_msg], len len[msg])

trusty_avb_msg [
	READ_ROLLBACK_INDEX		trusty_avb_msg_t[TRUSTY_AVB_READ_ROLLBACK_INDEX, trusty_avb_rollback_index]
	WRITE_ROLLBACK_INDEX		trusty_avb_msg_t[TRUSTY_AVB_WRITE_ROLLBACK_INDEX, trusty_avb_rollback_index]
	AVB_GET_VERSION			trusty_avb_msg_t[TRUSTY_AVB_GET_VERSION, void]
	READ_PERMANENT_ATTRIBUTES	trusty_avb_msg_t[TRUSTY_AVB_READ_PERMANENT_ATTRIBUTES, void]
	WRITE_PERMANENT_ATTRIBUTES	trusty_avb_msg_t[TRUSTY_AVB_WRITE_PERMANENT_ATTRIBUTES, array[int8]]
	READ_LOCK_STATE			trusty_avb_msg_t[TRUSTY_AVB_READ_LOCK_STATE, void]
	WRITE_LOCK_STATE		trusty_avb_msg_t[TRUSTY_AVB_WRITE_LOCK_STATE, int8]
	LOCK_BOOT_STATE			trusty_avb_msg_t[TRUSTY_AVB_LOCK_BOOT_STATE, void]
] [varlen]

type trusty_avb_msg_t[CMD, PAYLOAD] {
	cmd	const[CMD, int32]
	payload	PAYLOAD
} [packed]

trusty_avb_rollback_index {
	value	int64
	slot	int32
} [packed]

define TRUSTY_AVB_REQ_SHIFT	1
define TRUSTY_AVB_READ_ROLLBACK_INDEX	0 << TRUSTY_AVB_REQ_SHIFT
define TRUSTY_AVB_WRITE_ROLLBACK_INDEX	1 << TRUSTY_AVB_REQ_SHIFT
define TRUSTY_AVB_GET_VERSION	2 << TRUSTY_AVB_REQ_SHIFT
define TRUSTY_AVB_READ_PERMANENT_ATTRIBUTES	3 << TRUSTY_AVB_REQ_SHIFT
define TRUSTY_AVB_WRITE_PERMANENT_ATTRIBUTES	4 << TRUSTY_AVB_REQ_SHIFT
define TRUSTY_AVB_READ_LOCK_STATE	5 << TRUSTY_AVB_REQ_SHIFT
define TRUSTY_AVB_WRITE_LOCK_STATE	6 << TRUSTY_AVB_REQ_SHIFT
define TRUSTY_AVB_LOCK_BOOT_STATE	7 << TRUSTY_AVB_REQ_SHIFT

### storage ###

resource fd_trusty_storage[fd_trusty]

openat$trusty_storage(fd const[AT_FDCWD], file ptr[in, string["/dev/trusty-ipc-dev0"]], flags flags[trusty_open_flags], mode const[0]) fd_trusty_storage
ioctl$TIPC_IOC_CONNECT_storage(fd fd_trusty_storage, cmd const[TIPC_IOC_CONNECT], arg ptr[in, string[trusty_storage_ports]])
write$trusty_storage(fd fd_trusty_storage, msg ptr[in, trusty_storage], len len[msg])

trusty_storage_ports = "com.android.trusty.storage.proxy", "com.android.trusty.storage.client.td", "com.android.trusty.storage.client.tdea", "com.android.trusty.storage.client.tp"

trusty_storage [
	delete		trusty_storage_msg[TRUSTY_STORAGE_FILE_DELETE, trusty_storage_file_delete_req]
	open		trusty_storage_msg[TRUSTY_STORAGE_FILE_OPEN, trusty_storage_file_open_req]
	close		trusty_storage_msg[TRUSTY_STORAGE_FILE_CLOSE, trusty_storage_file_close_req]
	read		trusty_storage_msg[TRUSTY_STORAGE_FILE_READ, trusty_storage_file_read_req]
	write		trusty_storage_msg[TRUSTY_STORAGE_FILE_WRITE, trusty_storage_file_write_req]
	get_size	trusty_storage_msg[TRUSTY_STORAGE_FILE_GET_SIZE, trusty_storage_file_get_size_req]
	set_size	trusty_storage_msg[TRUSTY_STORAGE_FILE_SET_SIZE, trusty_storage_file_set_size_req]
	rpmb		trusty_storage_msg[TRUSTY_STORAGE_RPMB_SEND, trusty_storage_rpmb_send_req]
	end_trans	trusty_storage_msg[TRUSTY_STORAGE_END_TRANSACTION, void]
	move		trusty_storage_msg[TRUSTY_STORAGE_FILE_MOVE, trusty_storage_file_move_req]
	list		trusty_storage_msg[TRUSTY_STORAGE_FILE_LIST, trusty_storage_file_list_req]
] [varlen]

type trusty_storage_msg[CMD, PAYLOAD] {
	cmd		const[CMD, int32]
	op_id		int32[0:4]
	flags		int32[0:7]
	size		bytesize[parent, int32]
# TODO: this is only output, right?
	result		const[0, int32]
	__reserved	const[0, int32]
	payload		PAYLOAD
}

define TRUSTY_STORAGE_FILE_DELETE	1 << 1
define TRUSTY_STORAGE_FILE_OPEN	2 << 1
define TRUSTY_STORAGE_FILE_CLOSE	3 << 1
define TRUSTY_STORAGE_FILE_READ	4 << 1
define TRUSTY_STORAGE_FILE_WRITE	5 << 1
define TRUSTY_STORAGE_FILE_GET_SIZE	6 << 1
define TRUSTY_STORAGE_FILE_SET_SIZE	7 << 1
define TRUSTY_STORAGE_RPMB_SEND	8 << 1
define TRUSTY_STORAGE_END_TRANSACTION	9 << 1
define TRUSTY_STORAGE_FILE_MOVE	10 << 1
define TRUSTY_STORAGE_FILE_LIST	11 << 1

# Server returns handles in responses to requests, we don't parse them, so we just use int32 for now.
type trusty_storage_handle int32[0:4]

trusty_storage_file_delete_req {
	flags	const[0, int32]
	name	stringnoz
}

trusty_storage_file_move_req {
	flags		int32[0:7]
	handle		trusty_storage_handle
	old_name_len	bytesize[old_new_name, int32]
	old_new_name	stringnoz
	new_new_name	stringnoz
} [packed]

trusty_storage_file_open_req {
	flags	int32[0:7]
	name	stringnoz
}

trusty_storage_file_close_req {
	handle	trusty_storage_handle
}

trusty_storage_file_read_req {
	handle	trusty_storage_handle
	size	int32
	offset	int64
}

trusty_storage_file_write_req {
	offset		int64
	handle		trusty_storage_handle
	__reserved	const[0, int32]
	data		array[int8]
}

trusty_storage_file_list_req {
	max_count	int8
	flags		int8[0:7]
	name		stringnoz
}

trusty_storage_file_get_size_req {
	handle	trusty_storage_handle
}

trusty_storage_file_set_size_req {
	size	int64
	handle	trusty_storage_handle
}

trusty_storage_rpmb_send_req {
	reliable_write_size	bytesize[reliable_write, int32]
	write_size		bytesize[write, int32]
	read_size		int32[0:4096, 512]
	__reserved		const[0, int32]
	reliable_write		array[array[const[0, int8], 512]]
	write			array[array[const[0, int8], 512]]
} [packed]

### hwkey ###

resource fd_trusty_hwkey[fd_trusty]

openat$trusty_hwkey(fd const[AT_FDCWD], file ptr[in, string["/dev/trusty-ipc-dev0"]], flags flags[trusty_open_flags], mode const[0]) fd_trusty_hwkey
ioctl$TIPC_IOC_CONNECT_hwkey(fd fd_trusty_hwkey, cmd const[TIPC_IOC_CONNECT], arg ptr[in, string["com.android.trusty.hwkey"]])
write$trusty_hwkey(fd fd_trusty_hwkey, msg ptr[in, trusty_hwkey], len len[msg])

trusty_hwkey [
	get	trusty_hwkey_msg[TRUSTY_HWKEY_GET_KEYSLOT, stringnoz]
	derive	trusty_hwkey_msg[TRUSTY_HWKEY_DERIVE, stringnoz]
] [varlen]

type trusty_hwkey_msg[CMD, PAYLOAD] {
	cmd	const[CMD, int32]
	op_id	int32[0:4]
	status	const[0, int32]
	arg1	const[0, int32]
	arg2	const[0, int32]
	payload	PAYLOAD
}

define TRUSTY_HWKEY_GET_KEYSLOT	0 << 1
define TRUSTY_HWKEY_DERIVE	1 << 1

### hwrng ###

resource fd_trusty_hwrng[fd_trusty]

openat$trusty_hwrng(fd const[AT_FDCWD], file ptr[in, string["/dev/trusty-ipc-dev0"]], flags flags[trusty_open_flags], mode const[0]) fd_trusty_hwrng
ioctl$TIPC_IOC_CONNECT_hwrng(fd fd_trusty_hwrng, cmd const[TIPC_IOC_CONNECT], arg ptr[in, string["com.android.trusty.hwrng"]])
write$trusty_hwrng(fd fd_trusty_hwrng, msg ptr[in, int32], len len[msg])