trezor-firmware/storage/tests/tests/test_upgrade.py

import pytest
from c0.storage import Storage as StorageC0
from c3.storage import Storage as StorageC3
from c.storage import Storage as StorageC

from python.src.norcow import NorcowBitwise
from python.src.storage import Storage as StoragePy

from . import common

# Strings for testing ChaCha20 encryption.
chacha_strings = [
    b"Short string.",
    b"",
    b"Although ChaCha20 is a stream cipher, it operates on blocks of 64 bytes. This string is over 152 bytes in length so that we test multi-block encryption.",
    b"This string is exactly 64 bytes long, that is exactly one block.",
]


def set_values(s):
    s.set(0xBEEF, b"Hello")
    s.set(0xCAFE, b"world!  ")
    s.set(0xDEAD, b"How\n")
    s.change_pin("", "222")
    s.set(0xAAAA, b"are")
    s.set(0x0901, b"you?")
    s.set(0x0902, b"Lorem")
    s.set(0x0903, b"ipsum")
    s.change_pin("222", "99")
    s.set(0xDEAD, b"A\n")
    s.set(0xDEAD, b"AAAAAAAAAAA")
    s.set(0x2200, b"BBBB")
    for i, string in enumerate(chacha_strings):
        s.set(0x0301 + i, string)


def check_values(s):
    assert s.unlock("99")
    assert s.get(0xAAAA) == b"are"
    assert s.get(0x0901) == b"you?"
    assert s.get(0x0902) == b"Lorem"
    assert s.get(0x0903) == b"ipsum"
    assert s.get(0xDEAD) == b"AAAAAAAAAAA"
    assert s.get(0x2200) == b"BBBB"
    for i, string in enumerate(chacha_strings):
        assert s.get(0x0301 + i) == string


def test_upgrade():
    sc0 = StorageC0()
    sc0.init()
    assert sc0.unlock("")
    set_values(sc0)
    for _ in range(10):
        assert not sc0.unlock("3")

    sc1 = StorageC("libtrezor-storage.so")
    sc1._set_flash_buffer(sc0._get_flash_buffer())
    sc1.init(common.test_uid)
    assert sc1.get_pin_rem() == 6
    check_values(sc1)


def test_upgrade_from_3():
    sc3 = StorageC3("libtrezor-storage3.so")
    sc3.init(common.test_uid)
    assert sc3.unlock("")
    set_values(sc3)
    for _ in range(10):
        assert not sc3.unlock("3")

    sc = StorageC("libtrezor-storage.so")
    sc._set_flash_buffer(sc3._get_flash_buffer())
    sc.init(common.test_uid)
    assert sc.get_pin_rem() == 6
    check_values(sc)


@pytest.mark.parametrize("nc_class", [NorcowBitwise])
def test_python_set_sectors(nc_class):
    sp0 = StoragePy(nc_class)
    sp0.init(common.test_uid)
    assert sp0.unlock("")
    set_values(sp0)
    for _ in range(10):
        assert not sp0.unlock("3")
    assert sp0.get_pin_rem() == 6

    sp1 = StoragePy(nc_class)
    sp1.nc._set_sectors(sp0._dump())
    sp1.init(common.test_uid)
    common.memory_equals(sp0, sp1)

    assert sp1.get_pin_rem() == 6
    check_values(sp1)