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335 lines
11 KiB
335 lines
11 KiB
# 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, 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 parse_path
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from ...common import MNEMONIC12, is_core
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from ...tx_cache import TxCache
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from .signtx import (
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assert_tx_matches,
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request_finished,
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request_input,
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request_meta,
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request_output,
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)
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B = messages.ButtonRequestType
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TX_API = TxCache("Bitcoin")
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TX_API_TESTNET = TxCache("Testnet")
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TXHASH_c6091a = bytes.fromhex(
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"c6091adf4c0c23982a35899a6e58ae11e703eacd7954f588ed4b9cdefc4dba52"
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)
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TXHASH_509e08 = bytes.fromhex(
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"509e08424b047403b34dc83e9899e09185ea36791716e42c00a74e1f12bcb6ef"
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)
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TXHASH_6b07c1 = bytes.fromhex(
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"6b07c1321b52d9c85743f9695e13eb431b41708cdf4e1585258d51208e5b93fc"
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)
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TXHASH_0d5b56 = bytes.fromhex(
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"0d5b5648d47b5650edea1af3d47bbe5624213abb577cf1b1c96f98321f75cdbc"
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)
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pytestmark = pytest.mark.multisig
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@pytest.mark.multisig
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@pytest.mark.parametrize("chunkify", (True, False))
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def test_2_of_3(client: Client, chunkify: bool):
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# input tx: 6b07c1321b52d9c85743f9695e13eb431b41708cdf4e1585258d51208e5b93fc
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nodes = [
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btc.get_public_node(
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client, parse_path(f"m/48h/1h/{index}h/0h"), coin_name="Testnet"
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).node
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for index in range(1, 4)
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]
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multisig = messages.MultisigRedeemScriptType(
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nodes=nodes, address_n=[0, 0], signatures=[b"", b"", b""], m=2
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)
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# Let's go to sign with key 1
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inp1 = messages.TxInputType(
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address_n=parse_path("m/48h/1h/1h/0h/0/0"),
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amount=1_496_278,
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prev_hash=TXHASH_6b07c1,
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prev_index=0,
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script_type=messages.InputScriptType.SPENDMULTISIG,
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multisig=multisig,
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)
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out1 = messages.TxOutputType(
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address="mnY26FLTzfC94mDoUcyDJh1GVE3LuAUMbs", # "44h/1h/0h/0/6"
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amount=1_496_278 - 10_000,
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script_type=messages.OutputScriptType.PAYTOADDRESS,
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)
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# Expected responses are the same for both two signings
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expected_responses = [
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request_input(0),
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request_output(0),
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messages.ButtonRequest(code=B.ConfirmOutput),
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(is_core(client), messages.ButtonRequest(code=B.ConfirmOutput)),
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messages.ButtonRequest(code=B.SignTx),
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request_input(0),
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request_meta(TXHASH_6b07c1),
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request_input(0, TXHASH_6b07c1),
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request_output(0, TXHASH_6b07c1),
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request_input(0),
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request_output(0),
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request_output(0),
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request_finished(),
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]
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with client:
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client.set_expected_responses(expected_responses)
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# Now we have first signature
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signatures1, _ = btc.sign_tx(
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client,
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"Testnet",
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[inp1],
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[out1],
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prev_txes=TX_API_TESTNET,
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chunkify=chunkify,
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)
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assert (
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signatures1[0].hex()
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== "304402206c99b48a12f340599076b93efdc2578b0cdeaedf9092aed628788f4ffc579a50022031b16212dd1f0f62f01bb5862b6d128276c7a5430746aa27a04ae0c8acbcb3b1"
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)
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# ---------------------------------------
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# Let's do second signature using 3rd key
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multisig = messages.MultisigRedeemScriptType(
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nodes=nodes,
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address_n=[0, 0],
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signatures=[
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signatures1[0],
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b"",
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b"",
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], # Fill signature from previous signing process
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m=2,
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)
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# Let's do a second signature with key 3
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inp3 = messages.TxInputType(
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address_n=parse_path("m/48h/1h/3h/0h/0/0"),
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amount=1_496_278,
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prev_hash=TXHASH_6b07c1,
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prev_index=0,
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script_type=messages.InputScriptType.SPENDMULTISIG,
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multisig=multisig,
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)
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with client:
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client.set_expected_responses(expected_responses)
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signatures2, serialized_tx = btc.sign_tx(
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client, "Testnet", [inp3], [out1], prev_txes=TX_API_TESTNET
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)
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assert (
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signatures2[0].hex()
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== "304502210089153ad97c0d69656cd9bd9eb2056552acaec91365dd7ab31250f3f707123baa02200f884de63041d73bd20fbe8804c6036968d8149b7f46963a82b561cd8211ab08"
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)
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assert_tx_matches(
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serialized_tx,
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hash_link="https://tbtc1.trezor.io/api/tx/4123415574c16899b4bb5b691f9b65643dbe566a9b68e4e2e7a8b29c79c83f2b",
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tx_hex="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",
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)
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@pytest.mark.multisig
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def test_15_of_15(client: Client):
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# input tx: 0d5b5648d47b5650edea1af3d47bbe5624213abb577cf1b1c96f98321f75cdbc
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node = btc.get_public_node(
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client, parse_path("m/48h/1h/1h/0h"), coin_name="Testnet"
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).node
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pubs = [messages.HDNodePathType(node=node, address_n=[0, x]) for x in range(15)]
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signatures = [b""] * 15
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out1 = messages.TxOutputType(
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address="mnY26FLTzfC94mDoUcyDJh1GVE3LuAUMbs", # "44h/1h/0h/0/6"
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amount=1_476_278 - 10_000,
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script_type=messages.OutputScriptType.PAYTOADDRESS,
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)
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for x in range(15):
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multisig = messages.MultisigRedeemScriptType(
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pubkeys=pubs, signatures=signatures, m=15
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)
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inp1 = messages.TxInputType(
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address_n=parse_path(f"m/48h/1h/1h/0h/0/{x}"),
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amount=1_476_278,
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prev_hash=TXHASH_0d5b56,
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prev_index=0,
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script_type=messages.InputScriptType.SPENDMULTISIG,
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multisig=multisig,
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)
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with client:
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sig, serialized_tx = btc.sign_tx(
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client, "Testnet", [inp1], [out1], prev_txes=TX_API_TESTNET
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)
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signatures[x] = sig[0]
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assert_tx_matches(
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serialized_tx,
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hash_link="https://tbtc1.trezor.io/api/tx/b41284067577e1266ad3632f7caffead5d58277cc35f42642455bfd2a3fa0325",
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)
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@pytest.mark.multisig
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@pytest.mark.setup_client(mnemonic=MNEMONIC12)
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def test_missing_pubkey(client: Client):
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node = btc.get_public_node(
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client, parse_path("m/48h/0h/1h/0h/0"), coin_name="Bitcoin"
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).node
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multisig = messages.MultisigRedeemScriptType(
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pubkeys=[
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messages.HDNodePathType(node=node, address_n=[1]),
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messages.HDNodePathType(node=node, address_n=[2]),
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messages.HDNodePathType(node=node, address_n=[3]),
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],
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signatures=[b"", b"", b""],
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m=2,
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)
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# Let's go to sign with key 10, which is NOT in pubkeys
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inp1 = messages.TxInputType(
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address_n=parse_path("m/48h/0h/1h/0h/0/10"),
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amount=100_000,
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prev_hash=TXHASH_c6091a,
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prev_index=1,
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script_type=messages.InputScriptType.SPENDMULTISIG,
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multisig=multisig,
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)
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out1 = messages.TxOutputType(
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address="12iyMbUb4R2K3gre4dHSrbu5azG5KaqVss",
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amount=100_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, "Bitcoin", [inp1], [out1], prev_txes=TX_API)
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if client.features.model == "1":
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assert exc.value.message.endswith("Failed to derive scriptPubKey")
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else:
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assert exc.value.message.endswith("Pubkey not found in multisig script")
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@pytest.mark.multisig
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def test_attack_change_input(client: Client):
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"""
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In Phases 1 and 2 the attacker replaces a non-multisig input
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`input_real` with a multisig input `input_fake`, which allows the
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attacker to provide a 1-of-2 multisig change address. When `input_real`
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is provided in the signing phase, an error must occur.
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"""
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address_n = parse_path("m/48h/1h/0h/1h/0/0") # 2NErUdruXmM8o8bQySrzB3WdBRcmc5br4E8
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attacker_multisig_public_key = bytes.fromhex(
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"03653a148b68584acb97947344a7d4fd6a6f8b8485cad12987ff8edac874268088"
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)
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input_real = messages.TxInputType(
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address_n=address_n,
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prev_hash=TXHASH_509e08,
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prev_index=0,
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script_type=messages.InputScriptType.SPENDP2SHWITNESS,
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amount=61_093,
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)
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multisig_fake = messages.MultisigRedeemScriptType(
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m=1,
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nodes=[
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btc.get_public_node(client, address_n, coin_name="Testnet").node,
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messages.HDNodeType(
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depth=0,
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fingerprint=0,
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child_num=0,
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chain_code=bytes(32),
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public_key=attacker_multisig_public_key,
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),
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],
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address_n=[],
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)
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input_fake = messages.TxInputType(
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address_n=address_n,
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prev_hash=input_real.prev_hash,
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prev_index=input_real.prev_index,
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script_type=input_real.script_type,
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multisig=multisig_fake,
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amount=input_real.amount,
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)
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output_payee = messages.TxOutputType(
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address="n2eMqTT929pb1RDNuqEnxdaLau1rxy3efi",
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amount=10_000,
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script_type=messages.OutputScriptType.PAYTOADDRESS,
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)
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output_change = messages.TxOutputType(
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address_n=address_n,
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amount=input_real.amount - output_payee.amount - 1_000,
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script_type=messages.OutputScriptType.PAYTOP2SHWITNESS,
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multisig=multisig_fake,
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)
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# Transaction can be signed without the attack processor
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with client:
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btc.sign_tx(
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client,
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"Testnet",
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[input_real],
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[output_payee, output_change],
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prev_txes=TX_API_TESTNET,
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)
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attack_count = 3
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def attack_processor(msg):
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nonlocal attack_count
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# replace the first input_real with input_fake
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if attack_count > 0 and msg.tx.inputs and msg.tx.inputs[0] == input_real:
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msg.tx.inputs[0] = input_fake
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attack_count -= 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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with pytest.raises(TrezorFailure):
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btc.sign_tx(
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client,
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"Testnet",
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[input_real],
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[output_payee, output_change],
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prev_txes=TX_API_TESTNET,
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)
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