mirror of
https://github.com/trezor/trezor-firmware.git
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250 lines
8.9 KiB
Python
250 lines
8.9 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2019 SatoshiLabs and contributors
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3
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# as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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import pytest
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from trezorlib import btc, device, messages
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from trezorlib.debuglink import TrezorClientDebugLink as Client
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from trezorlib.exceptions import TrezorFailure
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from trezorlib.tools import H_, parse_path
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from ...tx_cache import TxCache
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from ..signtx import request_finished, request_input, request_meta, request_output
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B = messages.ButtonRequestType
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TX_CACHE_MAINNET = TxCache("Bitcoin")
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TX_CACHE_TESTNET = TxCache("Testnet")
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TX_CACHE_BCASH = TxCache("Bcash")
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TXHASH_8cc1f4 = bytes.fromhex(
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"8cc1f4adf7224ce855cf535a5104594a0004cb3b640d6714fdb00b9128832dd5"
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)
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TXHASH_a5cd2a = bytes.fromhex(
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"a5cd2a706d680587e572df16a8ce5233139a094ebbd148cc66a8004dcc88819c"
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)
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TXHASH_d5f65e = bytes.fromhex(
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"d5f65ee80147b4bcc70b75e4bbf2d7382021b871bd8867ef8fa525ef50864882"
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)
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TXHASH_fa80a9 = bytes.fromhex(
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"fa80a9949f1094119195064462f54d0e0eabd3139becd4514ae635b8c7fe3a46"
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)
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TXHASH_5dfd1b = bytes.fromhex(
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"5dfd1b037633adc7f84a17b2df31c9994fe50b3ab3e246c44c4ceff3d326f62e"
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)
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# Adapted from TestMsgSigntx.test_one_one_fee,
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# only changed the coin from Bitcoin to Litecoin.
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# Litecoin does not have strong replay protection using SIGHASH_FORKID,
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# spending from Bitcoin path should fail.
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@pytest.mark.altcoin
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def test_invalid_path_fail(client: Client):
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# tx: d5f65ee80147b4bcc70b75e4bbf2d7382021b871bd8867ef8fa525ef50864882
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# input 0: 0.0039 BTC
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inp1 = messages.TxInputType(
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address_n=parse_path("m/44h/0h/0h/0/0"),
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amount=390_000,
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prev_hash=TXHASH_d5f65e,
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prev_index=0,
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)
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# address is converted from 1MJ2tj2ThBE62zXbBYA5ZaN3fdve5CPAz1 by changing the version
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out1 = messages.TxOutputType(
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address="LfWz9wLHmqU9HoDkMg9NqbRosrHvEixeVZ",
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amount=390_000 - 10_000,
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script_type=messages.OutputScriptType.PAYTOADDRESS,
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)
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with pytest.raises(TrezorFailure) as exc:
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btc.sign_tx(client, "Litecoin", [inp1], [out1], prev_txes=TX_CACHE_MAINNET)
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assert exc.value.code == messages.FailureType.DataError
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assert exc.value.message.endswith("Forbidden key path")
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# Adapted from TestMsgSigntx.test_one_one_fee,
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# only changed the coin from Bitcoin to Litecoin and set safety checks to prompt.
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# Litecoin does not have strong replay protection using SIGHASH_FORKID, but
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# spending from Bitcoin path should pass with safety checks set to prompt.
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@pytest.mark.altcoin
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def test_invalid_path_prompt(client: Client):
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# tx: d5f65ee80147b4bcc70b75e4bbf2d7382021b871bd8867ef8fa525ef50864882
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# input 0: 0.0039 BTC
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inp1 = messages.TxInputType(
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address_n=parse_path("m/44h/0h/0h/0/0"),
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amount=390_000,
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prev_hash=TXHASH_d5f65e,
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prev_index=0,
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)
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# address is converted from 1MJ2tj2ThBE62zXbBYA5ZaN3fdve5CPAz1 by changing the version
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out1 = messages.TxOutputType(
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address="LfWz9wLHmqU9HoDkMg9NqbRosrHvEixeVZ",
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amount=390_000 - 10_000,
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script_type=messages.OutputScriptType.PAYTOADDRESS,
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)
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device.apply_settings(
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client, safety_checks=messages.SafetyCheckLevel.PromptTemporarily
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)
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btc.sign_tx(client, "Litecoin", [inp1], [out1], prev_txes=TX_CACHE_MAINNET)
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# Adapted from TestMsgSigntx.test_one_one_fee,
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# only changed the coin from Bitcoin to Bcash.
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# Bcash does have strong replay protection using SIGHASH_FORKID,
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# spending from Bitcoin path should work.
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@pytest.mark.altcoin
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def test_invalid_path_pass_forkid(client: Client):
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# tx: 8cc1f4adf7224ce855cf535a5104594a0004cb3b640d6714fdb00b9128832dd5
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# input 0: 0.0039 BTC
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inp1 = messages.TxInputType(
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address_n=parse_path("m/44h/0h/0h/0/0"),
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amount=390_000,
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prev_hash=TXHASH_8cc1f4,
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prev_index=0,
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)
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# address is converted from 1MJ2tj2ThBE62zXbBYA5ZaN3fdve5CPAz1 to cashaddr format
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out1 = messages.TxOutputType(
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address="bitcoincash:qr0fk25d5zygyn50u5w7h6jkvctas52n0qxff9ja6r",
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amount=390_000 - 10_000,
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script_type=messages.OutputScriptType.PAYTOADDRESS,
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)
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btc.sign_tx(client, "Bcash", [inp1], [out1], prev_txes=TX_CACHE_BCASH)
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def test_attack_path_segwit(client: Client):
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# Scenario: The attacker falsely claims that the transaction uses Testnet paths to
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# avoid the path warning dialog, but in step6_sign_segwit_inputs() uses Bitcoin paths
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# to get a valid signature.
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device.apply_settings(
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client, safety_checks=messages.SafetyCheckLevel.PromptTemporarily
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)
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inp1 = messages.TxInputType(
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# The actual input that the attcker wants to get signed.
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address_n=parse_path("m/84h/0h/0h/0/0"),
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amount=9_426,
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prev_hash=TXHASH_fa80a9,
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prev_index=0,
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script_type=messages.InputScriptType.SPENDWITNESS,
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)
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inp2 = messages.TxInputType(
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# The actual input that the attcker wants to get signed.
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# We need this one to be from a different account, so that the match checker
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# allows the transaction to pass.
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address_n=parse_path("m/84h/0h/1h/0/1"),
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amount=7_086,
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prev_hash=TXHASH_5dfd1b,
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prev_index=0,
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script_type=messages.InputScriptType.SPENDWITNESS,
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)
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out1 = messages.TxOutputType(
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# Attacker's Mainnet address encoded as Testnet.
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address="tb1q694ccp5qcc0udmfwgp692u2s2hjpq5h407urtu",
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script_type=messages.OutputScriptType.PAYTOADDRESS,
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amount=9_426 + 7_086 - 500,
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)
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attack_count = 6
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def attack_processor(msg):
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nonlocal attack_count
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# Make the inputs look like they are coming from Testnet paths until we reach the
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# signing phase.
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if attack_count > 0 and msg.tx.inputs and msg.tx.inputs[0] in (inp1, inp2):
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attack_count -= 1
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msg.tx.inputs[0].address_n[1] = H_(1)
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return msg
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with client:
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client.set_filter(messages.TxAck, attack_processor)
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client.set_expected_responses(
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[
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# Step: process inputs
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request_input(0),
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# Attacker bypasses warning about non-standard path.
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request_input(1),
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# Attacker bypasses warning about non-standard path.
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# Step: approve outputs
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request_output(0),
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messages.ButtonRequest(code=B.ConfirmOutput),
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messages.ButtonRequest(code=B.SignTx),
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# Step: verify inputs
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request_input(0),
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request_meta(TXHASH_fa80a9),
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request_input(0, TXHASH_fa80a9),
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request_output(0, TXHASH_fa80a9),
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request_output(1, TXHASH_fa80a9),
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request_input(1),
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request_meta(TXHASH_5dfd1b),
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request_input(0, TXHASH_5dfd1b),
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request_output(0, TXHASH_5dfd1b),
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request_output(1, TXHASH_5dfd1b),
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# Step: serialize inputs
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request_input(0),
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request_input(1),
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# Step: serialize outputs
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request_output(0),
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# Step: sign segwit inputs
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request_input(0),
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# Trezor must warn about non-standard path before signing.
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messages.ButtonRequest(code=B.UnknownDerivationPath),
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request_input(1),
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# Trezor must warn about non-standard path before signing.
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messages.ButtonRequest(code=B.UnknownDerivationPath),
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request_finished(),
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]
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)
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btc.sign_tx(client, "Testnet", [inp1, inp2], [out1], prev_txes=TX_CACHE_MAINNET)
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@pytest.mark.skip_t1(reason="T1 only prevents using paths known to be altcoins")
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def test_invalid_path_fail_asap(client: Client):
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inp1 = messages.TxInputType(
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address_n=parse_path("m/0"),
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amount=4_977_040,
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prev_hash=TXHASH_a5cd2a,
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prev_index=0,
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script_type=messages.InputScriptType.SPENDWITNESS,
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sequence=4_294_967_293,
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)
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out1 = messages.TxOutputType(
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address_n=parse_path("m/84h/0h/0h/1/0"),
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amount=4_977_040,
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script_type=messages.OutputScriptType.PAYTOWITNESS,
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)
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with client:
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client.set_expected_responses(
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[request_input(0), messages.Failure(code=messages.FailureType.DataError)]
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)
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try:
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btc.sign_tx(client, "Testnet", [inp1], [out1], prev_txes=TX_CACHE_TESTNET)
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except TrezorFailure:
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pass
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