mirror of
https://github.com/trezor/trezor-firmware.git
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155 lines
5.5 KiB
Python
155 lines
5.5 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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from itertools import combinations
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from unittest import mock
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import pytest
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from shamir_mnemonic import MnemonicError, shamir
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from trezorlib import device, messages as proto
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from trezorlib.exceptions import TrezorFailure
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from trezorlib.messages import BackupType, ButtonRequestType as B
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from ..common import (
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EXTERNAL_ENTROPY,
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click_through,
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generate_entropy,
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read_and_confirm_mnemonic,
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)
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STRENGTH_TO_WORDS = {128: 20, 256: 33}
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def reset_device(client, strength):
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words = STRENGTH_TO_WORDS[strength]
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member_threshold = 3
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all_mnemonics = []
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def input_flow():
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# 1. Confirm Reset
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# 2. Backup your seed
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# 3. Confirm warning
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# 4. shares info
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# 5. Set & Confirm number of shares
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# 6. threshold info
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# 7. Set & confirm threshold value
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# 8. Confirm show seeds
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yield from click_through(client.debug, screens=8, code=B.ResetDevice)
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# show & confirm shares
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for h in range(5):
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# mnemonic phrases
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btn_code = yield
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assert btn_code == B.ResetDevice
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mnemonic = read_and_confirm_mnemonic(client.debug, words=words)
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all_mnemonics.append(mnemonic)
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# Confirm continue to next share
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btn_code = yield
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assert btn_code == B.Success
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client.debug.press_yes()
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# safety warning
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btn_code = yield
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assert btn_code == B.Success
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client.debug.press_yes()
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os_urandom = mock.Mock(return_value=EXTERNAL_ENTROPY)
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with mock.patch("os.urandom", os_urandom), client:
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client.set_expected_responses(
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[
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proto.ButtonRequest(code=B.ResetDevice),
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proto.EntropyRequest(),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.Success),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.Success),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.Success),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.Success),
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proto.ButtonRequest(code=B.ResetDevice),
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proto.ButtonRequest(code=B.Success),
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proto.ButtonRequest(code=B.Success),
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proto.Success,
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proto.Features,
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]
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)
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client.set_input_flow(input_flow)
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# No PIN, no passphrase, don't display random
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device.reset(
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client,
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display_random=False,
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strength=strength,
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passphrase_protection=False,
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pin_protection=False,
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label="test",
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language="en-US",
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backup_type=BackupType.Slip39_Basic,
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)
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# generate secret locally
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internal_entropy = client.debug.state().reset_entropy
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secret = generate_entropy(strength, internal_entropy, EXTERNAL_ENTROPY)
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# validate that all combinations will result in the correct master secret
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validate_mnemonics(all_mnemonics, member_threshold, secret)
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# Check if device is properly initialized
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assert client.features.initialized is True
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assert client.features.needs_backup is False
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assert client.features.pin_protection is False
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assert client.features.passphrase_protection is False
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assert client.features.backup_type is BackupType.Slip39_Basic
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# backup attempt fails because backup was done in reset
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with pytest.raises(TrezorFailure, match="ProcessError: Seed already backed up"):
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device.backup(client)
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@pytest.mark.skip_t1
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class TestMsgResetDeviceT2:
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@pytest.mark.setup_client(uninitialized=True)
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def test_reset_device_slip39_basic(self, client):
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reset_device(client, 128)
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@pytest.mark.setup_client(uninitialized=True)
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def test_reset_device_slip39_basic_256(self, client):
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reset_device(client, 256)
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def validate_mnemonics(mnemonics, threshold, expected_ems):
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# We expect these combinations to recreate the secret properly
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for test_group in combinations(mnemonics, threshold):
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groups = shamir.decode_mnemonics(test_group)
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ems = shamir.recover_ems(groups)
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assert expected_ems == ems.ciphertext
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# We expect these combinations to raise MnemonicError
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for test_group in combinations(mnemonics, threshold - 1):
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with pytest.raises(
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MnemonicError, match=r".*Expected {} mnemonics.*".format(threshold)
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):
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shamir.combine_mnemonics(test_group)
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