mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-15 20:19:23 +00:00
396 lines
12 KiB
Python
396 lines
12 KiB
Python
from typing import TYPE_CHECKING
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import storage.cache
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import storage.device
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from trezor import config, utils, wire, workflow
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from trezor.enums import MessageType
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from trezor.messages import Success, UnlockPath
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from . import workflow_handlers
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if TYPE_CHECKING:
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from trezor import protobuf
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from trezor.messages import (
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Features,
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Initialize,
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EndSession,
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GetFeatures,
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Cancel,
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LockDevice,
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Ping,
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DoPreauthorized,
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CancelAuthorization,
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SetBusy,
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)
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def busy_expiry_ms() -> int:
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"""
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Returns the time left until the busy state expires or 0 if the device is not in the busy state.
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"""
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busy_deadline_ms = storage.cache.get_int(storage.cache.APP_COMMON_BUSY_DEADLINE_MS)
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if busy_deadline_ms is None:
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return 0
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import utime
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expiry_ms = utime.ticks_diff(busy_deadline_ms, utime.ticks_ms())
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return expiry_ms if expiry_ms > 0 else 0
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def get_features() -> Features:
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import storage.recovery
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import storage.sd_salt
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import storage # workaround for https://github.com/microsoft/pyright/issues/2685
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from trezor import sdcard
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from trezor.enums import Capability
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from trezor.messages import Features
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from apps.common import mnemonic, safety_checks
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f = Features(
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vendor="trezor.io",
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fw_vendor=utils.firmware_vendor(),
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language="en-US",
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major_version=utils.VERSION_MAJOR,
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minor_version=utils.VERSION_MINOR,
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patch_version=utils.VERSION_PATCH,
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revision=utils.SCM_REVISION,
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model=utils.MODEL,
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device_id=storage.device.get_device_id(),
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label=storage.device.get_label(),
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pin_protection=config.has_pin(),
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unlocked=config.is_unlocked(),
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busy=busy_expiry_ms() > 0,
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)
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if utils.BITCOIN_ONLY:
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f.capabilities = [
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Capability.Bitcoin,
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Capability.Crypto,
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Capability.Shamir,
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Capability.ShamirGroups,
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]
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else:
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f.capabilities = [
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Capability.Bitcoin,
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Capability.Bitcoin_like,
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Capability.Binance,
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Capability.Cardano,
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Capability.Crypto,
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Capability.EOS,
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Capability.Ethereum,
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Capability.Monero,
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Capability.NEM,
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Capability.Ripple,
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Capability.Stellar,
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Capability.Tezos,
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Capability.U2F,
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Capability.Shamir,
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Capability.ShamirGroups,
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]
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# Other models are not capable of PassphraseEntry
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if utils.MODEL in ("T",):
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f.capabilities.append(Capability.PassphraseEntry)
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f.sd_card_present = sdcard.is_present()
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f.initialized = storage.device.is_initialized()
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# private fields:
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if config.is_unlocked():
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# passphrase_protection is private, see #1807
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f.passphrase_protection = storage.device.is_passphrase_enabled()
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f.needs_backup = storage.device.needs_backup()
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f.unfinished_backup = storage.device.unfinished_backup()
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f.no_backup = storage.device.no_backup()
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f.flags = storage.device.get_flags()
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f.recovery_mode = storage.recovery.is_in_progress()
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f.backup_type = mnemonic.get_type()
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f.sd_protection = storage.sd_salt.is_enabled()
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f.wipe_code_protection = config.has_wipe_code()
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f.passphrase_always_on_device = storage.device.get_passphrase_always_on_device()
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f.safety_checks = safety_checks.read_setting()
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f.auto_lock_delay_ms = storage.device.get_autolock_delay_ms()
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f.display_rotation = storage.device.get_rotation()
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f.experimental_features = storage.device.get_experimental_features()
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return f
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async def handle_Initialize(ctx: wire.Context, msg: Initialize) -> Features:
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session_id = storage.cache.start_session(msg.session_id)
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if not utils.BITCOIN_ONLY:
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derive_cardano = storage.cache.get(storage.cache.APP_COMMON_DERIVE_CARDANO)
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have_seed = storage.cache.is_set(storage.cache.APP_COMMON_SEED)
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if (
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have_seed
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and msg.derive_cardano is not None
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and msg.derive_cardano != bool(derive_cardano)
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):
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# seed is already derived, and host wants to change derive_cardano setting
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# => create a new session
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storage.cache.end_current_session()
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session_id = storage.cache.start_session()
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have_seed = False
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if not have_seed:
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storage.cache.set(
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storage.cache.APP_COMMON_DERIVE_CARDANO,
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b"\x01" if msg.derive_cardano else b"",
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)
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features = get_features()
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features.session_id = session_id
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return features
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async def handle_GetFeatures(ctx: wire.Context, msg: GetFeatures) -> Features:
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return get_features()
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async def handle_Cancel(ctx: wire.Context, msg: Cancel) -> Success:
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raise wire.ActionCancelled
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async def handle_LockDevice(ctx: wire.Context, msg: LockDevice) -> Success:
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lock_device()
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return Success()
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async def handle_SetBusy(ctx: wire.Context, msg: SetBusy) -> Success:
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if not storage.device.is_initialized():
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raise wire.NotInitialized("Device is not initialized")
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if msg.expiry_ms:
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import utime
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deadline = utime.ticks_add(utime.ticks_ms(), msg.expiry_ms)
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storage.cache.set_int(storage.cache.APP_COMMON_BUSY_DEADLINE_MS, deadline)
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else:
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storage.cache.delete(storage.cache.APP_COMMON_BUSY_DEADLINE_MS)
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set_homescreen()
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workflow.close_others()
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return Success()
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async def handle_EndSession(ctx: wire.Context, msg: EndSession) -> Success:
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storage.cache.end_current_session()
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return Success()
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async def handle_Ping(ctx: wire.Context, msg: Ping) -> Success:
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if msg.button_protection:
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from trezor.ui.layouts import confirm_action
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from trezor.enums import ButtonRequestType as B
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await confirm_action(ctx, "ping", "Confirm", "ping", br_code=B.ProtectCall)
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return Success(message=msg.message)
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async def handle_DoPreauthorized(
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ctx: wire.Context, msg: DoPreauthorized
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) -> protobuf.MessageType:
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from trezor.messages import PreauthorizedRequest
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from apps.common import authorization
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if not authorization.is_set():
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raise wire.ProcessError("No preauthorized operation")
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wire_types = authorization.get_wire_types()
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utils.ensure(bool(wire_types), "Unsupported preauthorization found")
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req = await ctx.call_any(PreauthorizedRequest(), *wire_types)
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assert req.MESSAGE_WIRE_TYPE is not None
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handler = workflow_handlers.find_registered_handler(
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ctx.iface, req.MESSAGE_WIRE_TYPE
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)
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if handler is None:
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return wire.unexpected_message()
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return await handler(ctx, req, authorization.get()) # type: ignore [Expected 2 positional arguments]
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async def handle_UnlockPath(ctx: wire.Context, msg: UnlockPath) -> protobuf.MessageType:
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from trezor.crypto import hmac
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from trezor.messages import UnlockedPathRequest
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from trezor.ui.layouts import confirm_action
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from apps.common.paths import SLIP25_PURPOSE
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from apps.common.seed import Slip21Node, get_seed
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from apps.common.writers import write_uint32_le
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_KEYCHAIN_MAC_KEY_PATH = [b"TREZOR", b"Keychain MAC key"]
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# UnlockPath is relevant only for SLIP-25 paths.
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# Note: Currently we only allow unlocking the entire SLIP-25 purpose subtree instead of
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# per-coin or per-account unlocking in order to avoid UI complexity.
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if msg.address_n != [SLIP25_PURPOSE]:
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raise wire.DataError("Invalid path")
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seed = await get_seed(ctx)
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node = Slip21Node(seed)
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node.derive_path(_KEYCHAIN_MAC_KEY_PATH)
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mac = utils.HashWriter(hmac(hmac.SHA256, node.key()))
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for i in msg.address_n:
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write_uint32_le(mac, i)
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expected_mac = mac.get_digest()
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# Require confirmation to access SLIP25 paths unless already authorized.
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if msg.mac:
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if len(msg.mac) != len(expected_mac) or not utils.consteq(
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expected_mac, msg.mac
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):
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raise wire.DataError("Invalid MAC")
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else:
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await confirm_action(
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ctx,
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"confirm_coinjoin_access",
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title="CoinJoin account",
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description="Do you want to allow access to your CoinJoin account?",
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)
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wire_types = (MessageType.GetAddress, MessageType.GetPublicKey, MessageType.SignTx)
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req = await ctx.call_any(UnlockedPathRequest(mac=expected_mac), *wire_types)
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assert req.MESSAGE_WIRE_TYPE in wire_types
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handler = workflow_handlers.find_registered_handler(
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ctx.iface, req.MESSAGE_WIRE_TYPE
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)
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assert handler is not None
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return await handler(ctx, req, msg) # type: ignore [Expected 2 positional arguments]
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async def handle_CancelAuthorization(
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ctx: wire.Context, msg: CancelAuthorization
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) -> protobuf.MessageType:
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from apps.common import authorization
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authorization.clear()
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return Success(message="Authorization cancelled")
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ALLOW_WHILE_LOCKED = (
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MessageType.Initialize,
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MessageType.EndSession,
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MessageType.GetFeatures,
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MessageType.Cancel,
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MessageType.LockDevice,
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MessageType.DoPreauthorized,
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MessageType.WipeDevice,
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MessageType.SetBusy,
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)
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def set_homescreen() -> None:
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import storage.recovery
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import storage # workaround for https://github.com/microsoft/pyright/issues/2685
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if storage.cache.is_set(storage.cache.APP_COMMON_BUSY_DEADLINE_MS):
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from apps.homescreen.busyscreen import busyscreen
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workflow.set_default(busyscreen)
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elif not config.is_unlocked():
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from apps.homescreen.lockscreen import lockscreen
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workflow.set_default(lockscreen)
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elif storage.recovery.is_in_progress():
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from apps.management.recovery_device.homescreen import recovery_homescreen
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workflow.set_default(recovery_homescreen)
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else:
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from apps.homescreen.homescreen import homescreen
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workflow.set_default(homescreen)
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def lock_device() -> None:
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if config.has_pin():
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config.lock()
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wire.find_handler = get_pinlocked_handler
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set_homescreen()
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workflow.close_others()
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def lock_device_if_unlocked() -> None:
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if config.is_unlocked():
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lock_device()
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async def unlock_device(ctx: wire.GenericContext = wire.DUMMY_CONTEXT) -> None:
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"""Ensure the device is in unlocked state.
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If the storage is locked, attempt to unlock it. Reset the homescreen and the wire
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handler.
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"""
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from apps.common.request_pin import verify_user_pin
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if not config.is_unlocked():
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# verify_user_pin will raise if the PIN was invalid
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await verify_user_pin(ctx)
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set_homescreen()
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wire.find_handler = workflow_handlers.find_registered_handler
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def get_pinlocked_handler(
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iface: wire.WireInterface, msg_type: int
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) -> wire.Handler[wire.Msg] | None:
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orig_handler = workflow_handlers.find_registered_handler(iface, msg_type)
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if orig_handler is None:
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return None
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if __debug__:
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import usb
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if iface is usb.iface_debug:
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return orig_handler
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if msg_type in ALLOW_WHILE_LOCKED:
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return orig_handler
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async def wrapper(ctx: wire.Context, msg: wire.Msg) -> protobuf.MessageType:
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await unlock_device(ctx)
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return await orig_handler(ctx, msg)
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return wrapper
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# this function is also called when handling ApplySettings
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def reload_settings_from_storage() -> None:
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from trezor import ui
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workflow.idle_timer.set(
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storage.device.get_autolock_delay_ms(), lock_device_if_unlocked
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)
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wire.experimental_enabled = storage.device.get_experimental_features()
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ui.display.orientation(storage.device.get_rotation())
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def boot() -> None:
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workflow_handlers.register(MessageType.Initialize, handle_Initialize)
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workflow_handlers.register(MessageType.GetFeatures, handle_GetFeatures)
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workflow_handlers.register(MessageType.Cancel, handle_Cancel)
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workflow_handlers.register(MessageType.LockDevice, handle_LockDevice)
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workflow_handlers.register(MessageType.EndSession, handle_EndSession)
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workflow_handlers.register(MessageType.Ping, handle_Ping)
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workflow_handlers.register(MessageType.DoPreauthorized, handle_DoPreauthorized)
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workflow_handlers.register(MessageType.UnlockPath, handle_UnlockPath)
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workflow_handlers.register(
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MessageType.CancelAuthorization, handle_CancelAuthorization
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)
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workflow_handlers.register(MessageType.SetBusy, handle_SetBusy)
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reload_settings_from_storage()
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if config.is_unlocked():
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wire.find_handler = workflow_handlers.find_registered_handler
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else:
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wire.find_handler = get_pinlocked_handler
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