mirror of
https://github.com/trezor/trezor-firmware.git
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330 lines
12 KiB
Python
330 lines
12 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, messages as proto
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from trezorlib.exceptions import TrezorFailure
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from trezorlib.tools import parse_path, tx_hash
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from ..common import MNEMONIC12
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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 = proto.ButtonRequestType
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TX_API = TxCache("Bitcoin")
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TXHASH_c6091a = bytes.fromhex(
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"c6091adf4c0c23982a35899a6e58ae11e703eacd7954f588ed4b9cdefc4dba52"
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)
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TXHASH_6189e3 = bytes.fromhex(
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"6189e3febb5a21cee8b725aa1ef04ffce7e609448446d3a8d6f483c634ef5315"
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)
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TXHASH_fbbff7 = bytes.fromhex(
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"fbbff7f3c85f8067453d7c062bd5efb8ad839953376ae5eceaf92774102c6e39"
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)
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class TestMultisig:
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@pytest.mark.multisig
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def test_2_of_3(self, client):
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nodes = [
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btc.get_public_node(client, parse_path("48'/0'/%d'" % index)).node
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for index in range(1, 4)
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]
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multisig = proto.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 = proto.TxInputType(
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address_n=parse_path("48'/0'/1'/0/0"),
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prev_hash=TXHASH_c6091a,
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prev_index=1,
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script_type=proto.InputScriptType.SPENDMULTISIG,
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multisig=multisig,
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)
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out1 = proto.TxOutputType(
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address="12iyMbUb4R2K3gre4dHSrbu5azG5KaqVss",
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amount=100000,
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script_type=proto.OutputScriptType.PAYTOADDRESS,
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)
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with client:
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client.set_expected_responses(
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[
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request_input(0),
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request_meta(TXHASH_c6091a),
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request_input(0, TXHASH_c6091a),
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request_output(0, TXHASH_c6091a),
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request_output(1, TXHASH_c6091a),
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request_output(0),
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proto.ButtonRequest(code=B.ConfirmOutput),
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proto.ButtonRequest(code=B.SignTx),
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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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)
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# Now we have first signature
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signatures1, _ = btc.sign_tx(
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client, "Bitcoin", [inp1], [out1], prev_txes=TX_API
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)
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assert (
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signatures1[0].hex()
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== "3044022052f4a3dc5ca3e86ed66abb1e2b4d9b9ace7d96f5615944beea19e58280847c2902201bd3ff32a38366a4eed0373e27da26ebc0d2a4c2bbeffd83e8a60e313d95b9e3"
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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 = proto.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 = proto.TxInputType(
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address_n=parse_path("48'/0'/3'/0/0"),
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prev_hash=TXHASH_c6091a,
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prev_index=1,
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script_type=proto.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(
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[
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request_input(0),
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request_meta(TXHASH_c6091a),
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request_input(0, TXHASH_c6091a),
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request_output(0, TXHASH_c6091a),
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request_output(1, TXHASH_c6091a),
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request_output(0),
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proto.ButtonRequest(code=B.ConfirmOutput),
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proto.ButtonRequest(code=B.SignTx),
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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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)
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signatures2, serialized_tx = btc.sign_tx(
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client, "Bitcoin", [inp3], [out1], prev_txes=TX_API
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)
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assert (
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signatures2[0].hex()
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== "304402203828fd48540811be6a1b12967e7012587c46e6f05c78d42471e7b25c06bc7afc0220749274bc1aa698335b00400c5ba946a70b6b46c711324fbc4989279737a57f49"
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)
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assert (
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serialized_tx.hex()
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== "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"
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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_15_of_15(self, client):
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node = btc.get_public_node(
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client, parse_path("48h/0h/1h/0"), coin_name="Bitcoin"
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).node
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pubs = [proto.HDNodePathType(node=node, address_n=[x]) for x in range(15)]
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signatures = [b""] * 15
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out1 = proto.TxOutputType(
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address="17kTB7qSk3MupQxWdiv5ZU3zcrZc2Azes1",
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amount=10000,
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script_type=proto.OutputScriptType.PAYTOADDRESS,
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)
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for x in range(15):
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multisig = proto.MultisigRedeemScriptType(
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pubkeys=pubs, signatures=signatures, m=15
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)
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inp1 = proto.TxInputType(
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address_n=parse_path(f"48h/0h/1h/0/{x}"),
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prev_hash=TXHASH_6189e3,
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prev_index=1,
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script_type=proto.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, "Bitcoin", [inp1], [out1], prev_txes=TX_API
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)
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signatures[x] = sig[0]
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assert (
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tx_hash(serialized_tx).hex()
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== "3bffdb495711c57b0e2cd4e0dbd0ddbccf28052aa67466eafa2d4f666e797e5f"
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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(self, client):
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node = btc.get_public_node(
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client, parse_path("48h/0h/1h/0"), coin_name="Bitcoin"
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).node
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multisig = proto.MultisigRedeemScriptType(
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pubkeys=[
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proto.HDNodePathType(node=node, address_n=[1]),
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proto.HDNodePathType(node=node, address_n=[2]),
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proto.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 = proto.TxInputType(
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address_n=parse_path("48h/0h/1h/0/10"),
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prev_hash=TXHASH_c6091a,
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prev_index=1,
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script_type=proto.InputScriptType.SPENDMULTISIG,
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multisig=multisig,
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)
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out1 = proto.TxOutputType(
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address="12iyMbUb4R2K3gre4dHSrbu5azG5KaqVss",
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amount=100000,
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script_type=proto.OutputScriptType.PAYTOADDRESS,
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)
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with pytest.raises(TrezorFailure, match="Pubkey not found in multisig script"):
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btc.sign_tx(client, "Bitcoin", [inp1], [out1], prev_txes=TX_API)
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def test_attack_change_input(self, 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("48'/1'/0'/0/0")
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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 = proto.TxInputType(
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address_n=address_n,
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prev_hash=TXHASH_fbbff7,
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prev_index=1,
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script_type=proto.InputScriptType.SPENDP2SHWITNESS,
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amount=1000000,
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)
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multisig_fake = proto.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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proto.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 = proto.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 = proto.TxOutputType(
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address="n2eMqTT929pb1RDNuqEnxdaLau1rxy3efi",
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amount=1000,
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script_type=proto.OutputScriptType.PAYTOADDRESS,
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)
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output_change = proto.TxOutputType(
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address_n=address_n,
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amount=input_real.amount - output_payee.amount - 1000,
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script_type=proto.OutputScriptType.PAYTOP2SHWITNESS,
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multisig=multisig_fake,
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)
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attack_count = 2
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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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client.set_filter(proto.TxAck, attack_processor)
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with client:
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client.set_expected_responses(
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[
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request_input(0),
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request_meta(TXHASH_fbbff7),
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request_input(0, TXHASH_fbbff7),
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request_output(0, TXHASH_fbbff7),
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request_output(1, TXHASH_fbbff7),
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request_output(0),
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proto.ButtonRequest(code=B.ConfirmOutput),
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request_output(1),
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proto.ButtonRequest(code=B.SignTx),
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request_input(0),
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request_output(0),
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request_output(1),
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request_input(0),
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proto.Failure(code=proto.FailureType.ProcessError),
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]
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)
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with pytest.raises(TrezorFailure) as exc:
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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=TxCache("Testnet"),
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)
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# must not produce this tx:
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# 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assert exc.value.code == proto.FailureType.ProcessError
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if client.features.model == "1":
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assert exc.value.message.endswith("Failed to compile input")
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else:
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assert exc.value.message.endswith(
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"Transaction has changed during signing"
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)
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