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126 lines
3.9 KiB
126 lines
3.9 KiB
from trezor import log, protobuf
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from trezor.enums import ThpPairingMethod
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from trezor.messages import (
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ThpCodeEntryChallenge,
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ThpCodeEntryCommitment,
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ThpCodeEntryCpaceHost,
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ThpCodeEntryCpaceTrezor,
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ThpCodeEntrySecret,
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ThpCodeEntryTag,
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ThpCredentialRequest,
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ThpCredentialResponse,
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ThpEndRequest,
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ThpEndResponse,
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ThpNfcUnideirectionalSecret,
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ThpNfcUnidirectionalTag,
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ThpQrCodeSecret,
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ThpQrCodeTag,
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ThpStartPairingRequest,
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)
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from trezor.wire.errors import UnexpectedMessage
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from trezor.wire.thp import ChannelState
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from trezor.wire.thp.channel import Channel
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from trezor.wire.thp.thp_session import ThpError
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# TODO implement the following handlers
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async def handle_pairing_request(
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channel: Channel, message: protobuf.MessageType
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) -> ThpCodeEntryCommitment | None:
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assert ThpStartPairingRequest.is_type_of(message)
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if __debug__:
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log.debug(__name__, "handle_pairing_request")
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_check_state(channel, ChannelState.TP1)
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if _is_method_included(channel, ThpPairingMethod.PairingMethod_CodeEntry):
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channel.set_channel_state(ChannelState.TP2)
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return ThpCodeEntryCommitment()
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channel.set_channel_state(ChannelState.TP3)
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return None
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async def handle_code_entry_challenge(
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channel: Channel, message: protobuf.MessageType
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) -> None:
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assert ThpCodeEntryChallenge.is_type_of(message)
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_check_state(channel, ChannelState.TP2)
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channel.set_channel_state(ChannelState.TP3)
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async def handle_code_entry_cpace(
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channel: Channel, message: protobuf.MessageType
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) -> ThpCodeEntryCpaceTrezor:
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assert ThpCodeEntryCpaceHost.is_type_of(message)
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_check_state(channel, ChannelState.TP3)
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_check_method_is_allowed(channel, ThpPairingMethod.PairingMethod_CodeEntry)
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channel.set_channel_state(ChannelState.TP4)
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return ThpCodeEntryCpaceTrezor()
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async def handle_code_entry_tag(
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channel: Channel, message: protobuf.MessageType
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) -> ThpCodeEntrySecret:
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assert ThpCodeEntryTag.is_type_of(message)
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_check_state(channel, ChannelState.TP4)
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channel.set_channel_state(ChannelState.TC1)
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return ThpCodeEntrySecret()
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async def handle_qr_code_tag(
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channel: Channel, message: protobuf.MessageType
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) -> ThpQrCodeSecret:
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assert ThpQrCodeTag.is_type_of(message)
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_check_state(channel, ChannelState.TP3)
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_check_method_is_allowed(channel, ThpPairingMethod.PairingMethod_QrCode)
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channel.set_channel_state(ChannelState.TC1)
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return ThpQrCodeSecret()
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async def handle_nfc_unidirectional_tag(
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channel: Channel, message: protobuf.MessageType
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) -> ThpNfcUnideirectionalSecret:
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assert ThpNfcUnidirectionalTag.is_type_of(message)
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_check_state(channel, ChannelState.TP3)
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_check_method_is_allowed(channel, ThpPairingMethod.PairingMethod_NFC_Unidirectional)
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channel.set_channel_state(ChannelState.TC1)
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return ThpNfcUnideirectionalSecret()
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async def handle_credential_request(
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channel: Channel, message: protobuf.MessageType
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) -> ThpCredentialResponse:
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assert ThpCredentialRequest.is_type_of(message)
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_check_state(channel, ChannelState.TC1)
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return ThpCredentialResponse()
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async def handle_end_request(
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channel: Channel, message: protobuf.MessageType
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) -> ThpEndResponse:
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assert ThpEndRequest.is_type_of(message)
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_check_state(channel, ChannelState.TC1)
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channel.set_channel_state(ChannelState.ENCRYPTED_TRANSPORT)
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return ThpEndResponse()
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def _check_state(channel: Channel, expected_state: ChannelState) -> None:
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if expected_state is not channel.get_channel_state():
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raise UnexpectedMessage("Unexpected message")
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def _check_method_is_allowed(channel: Channel, method: ThpPairingMethod) -> None:
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if not _is_method_included(channel, method):
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raise ThpError("Unexpected pairing method")
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def _is_method_included(channel: Channel, method: ThpPairingMethod) -> bool:
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return method in channel.selected_pairing_methods
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