mirror of
https://github.com/trezor/trezor-firmware.git
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121 lines
3.9 KiB
Python
121 lines
3.9 KiB
Python
import os
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import typing as t
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import pytest
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import typing_extensions as tx
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from trezorlib.client import ProtocolV2
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from trezorlib.debuglink import TrezorClientDebugLink as Client
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from trezorlib.messages import (
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ThpEndResponse,
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ThpPairingMethod,
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ThpPairingRequest,
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ThpPairingRequestApproved,
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ThpSelectMethod,
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)
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from trezorlib.transport.thp import curve25519
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from trezorlib.transport.thp.protocol_v2 import MANAGEMENT_SESSION_ID, _hkdf
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if t.TYPE_CHECKING:
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P = tx.ParamSpec("P")
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pytestmark = [pytest.mark.protocol("protocol_v2")]
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def test_allocate_channel(client: Client) -> None:
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protocol: ProtocolV2 = client.protocol
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nonce = b"\x1A\x2B\x3B\x4A\x5C\x6D\x7E\x8F"
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# Use valid nonce
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protocol._send_channel_allocation_request(nonce)
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protocol._read_channel_allocation_response(nonce)
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# Expect different nonce
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protocol._send_channel_allocation_request(nonce)
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with pytest.raises(Exception, match="Invalid channel allocation response."):
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protocol._read_channel_allocation_response(
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expected_nonce=b"\xDE\xAD\xBE\xEF\xDE\xAD\xBE\xEF"
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)
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client.invalidate()
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def test_handshake(client: Client) -> None:
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protocol: ProtocolV2 = client.protocol
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protocol.sync_bit_send = 0
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protocol.sync_bit_receive = 0
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host_ephemeral_privkey = curve25519.get_private_key(os.urandom(32))
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host_ephemeral_pubkey = curve25519.get_public_key(host_ephemeral_privkey)
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protocol._do_channel_allocation()
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protocol._send_handshake_init_request(host_ephemeral_pubkey)
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protocol._read_ack()
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init_response = protocol._read_handshake_init_response()
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trezor_ephemeral_pubkey = init_response[:32]
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encrypted_trezor_static_pubkey = init_response[32:80]
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noise_tag = init_response[80:96]
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# TODO check noise_tag is valid
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ck = protocol._send_handshake_completion_request(
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host_ephemeral_pubkey,
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host_ephemeral_privkey,
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trezor_ephemeral_pubkey,
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encrypted_trezor_static_pubkey,
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)
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protocol._read_ack()
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protocol._read_handshake_completion_response()
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protocol.key_request, protocol.key_response = _hkdf(ck, b"")
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protocol.nonce_request = 0
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protocol.nonce_response = 1
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# TODO - without pairing, the client is damaged and results in fail of the following test
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# so far no luck in solving it - it should be also tackled in FW, as it causes unexpected FW error
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protocol._do_pairing()
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# TODO the following is just to make style checker happy
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assert noise_tag is not None
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def test_pairing(client: Client) -> None:
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protocol: ProtocolV2 = client.protocol
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protocol.sync_bit_send = 0
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protocol.sync_bit_receive = 0
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# Generate ephemeral keys
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host_ephemeral_privkey = curve25519.get_private_key(os.urandom(32))
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host_ephemeral_pubkey = curve25519.get_public_key(host_ephemeral_privkey)
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protocol._do_channel_allocation()
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protocol._do_handshake(host_ephemeral_privkey, host_ephemeral_pubkey)
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# Send StartPairingReqest message
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message = ThpPairingRequest()
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message_type, message_data = protocol.mapping.encode(message)
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protocol._encrypt_and_write(MANAGEMENT_SESSION_ID, message_type, message_data)
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# Read ACK
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protocol._read_ack()
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# Read PairingRequestApproved
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_, msg_type, msg_data = protocol.read_and_decrypt()
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maaa = protocol.mapping.decode(msg_type, msg_data)
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assert isinstance(maaa, ThpPairingRequestApproved)
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message = ThpSelectMethod(selected_pairing_method=ThpPairingMethod.SkipPairing)
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message_type, message_data = protocol.mapping.encode(message)
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protocol._encrypt_and_write(MANAGEMENT_SESSION_ID, message_type, message_data)
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# Read ACK
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protocol._read_ack()
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# Read ThpEndResponse
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_, msg_type, msg_data = protocol.read_and_decrypt()
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maaa = protocol.mapping.decode(msg_type, msg_data)
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assert isinstance(maaa, ThpEndResponse)
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protocol._has_valid_channel = True
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