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169 lines
6.3 KiB
169 lines
6.3 KiB
from itertools import combinations
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from unittest import mock
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import pytest
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import shamir_mnemonic as shamir
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from shamir_mnemonic import MnemonicError
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from trezorlib import device, messages as proto
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from trezorlib.messages import ButtonRequestType as B, ResetDeviceBackupType
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from .common import TrezorTest, generate_entropy
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EXTERNAL_ENTROPY = b"zlutoucky kun upel divoke ody" * 2
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@pytest.mark.skip_t1
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class TestMsgResetDeviceT2(TrezorTest):
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# TODO: test with different options
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def test_reset_device_shamir(self):
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strength = 128
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member_threshold = 3
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def input_flow():
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# Confirm Reset
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btn_code = yield
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assert btn_code == B.ResetDevice
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self.client.debug.press_yes()
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# Backup your seed
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btn_code = yield
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assert btn_code == B.ResetDevice
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self.client.debug.press_yes()
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# Confirm warning
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btn_code = yield
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assert btn_code == B.ResetDevice
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self.client.debug.press_yes()
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# shares info
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btn_code = yield
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assert btn_code == B.ResetDevice
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self.client.debug.press_yes()
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# Set & Confirm number of shares
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btn_code = yield
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assert btn_code == B.ResetDevice
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self.client.debug.press_yes()
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# threshold info
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btn_code = yield
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assert btn_code == B.ResetDevice
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self.client.debug.press_yes()
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# Set & confirm threshold value
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btn_code = yield
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assert btn_code == B.ResetDevice
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self.client.debug.press_yes()
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# Confirm show seeds
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btn_code = yield
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assert btn_code == B.ResetDevice
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self.client.debug.press_yes()
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# show & confirm shares
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all_mnemonics = []
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for h in range(5):
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words = []
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btn_code = yield
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assert btn_code == B.Other
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# mnemonic phrases
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# 20 word over 6 pages for strength 128, 33 words over 9 pages for strength 256
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for i in range(6):
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words.extend(self.client.debug.read_reset_word().split())
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if i < 5:
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self.client.debug.swipe_down()
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else:
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# last page is confirmation
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self.client.debug.press_yes()
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# check share
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for _ in range(3):
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index = self.client.debug.read_reset_word_pos()
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self.client.debug.input(words[index])
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all_mnemonics.extend([" ".join(words)])
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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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self.client.debug.press_yes()
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# generate secret locally
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internal_entropy = self.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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# safety warning
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btn_code = yield
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assert btn_code == B.Success
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self.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), self.client:
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self.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.Other),
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proto.ButtonRequest(code=B.Success),
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proto.ButtonRequest(code=B.Other),
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proto.ButtonRequest(code=B.Success),
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proto.ButtonRequest(code=B.Other),
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proto.ButtonRequest(code=B.Success),
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proto.ButtonRequest(code=B.Other),
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proto.ButtonRequest(code=B.Success),
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proto.ButtonRequest(code=B.Other),
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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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self.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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self.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="english",
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backup_type=ResetDeviceBackupType.Slip39_Single_Group,
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)
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# Check if device is properly initialized
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resp = self.client.call_raw(proto.Initialize())
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assert resp.initialized is True
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assert resp.needs_backup is False
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assert resp.pin_protection is False
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assert resp.passphrase_protection is False
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def validate_mnemonics(mnemonics, threshold, expected_secret):
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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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# TODO: HOTFIX, we should fix this properly by modifying and unifying the python-shamir-mnemonic API
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ms = shamir.combine_mnemonics(test_group)
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identifier, iteration_exponent, _, _, _ = shamir._decode_mnemonics(test_group)
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ems = shamir._encrypt(ms, b"", iteration_exponent, identifier)
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assert ems == expected_secret
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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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