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trezor-firmware/storage/tests/c0/storage.py

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import ctypes as c
import os
sectrue = -1431655766 # 0xAAAAAAAAA
fname = os.path.join(os.path.dirname(__file__), "libtrezor-storage0.so")
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class Storage:
def __init__(self) -> None:
self.lib = c.cdll.LoadLibrary(fname)
self.flash_size = c.cast(self.lib.FLASH_SIZE, c.POINTER(c.c_uint32))[0]
self.flash_buffer = c.create_string_buffer(self.flash_size)
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c.cast(self.lib.FLASH_BUFFER, c.POINTER(c.c_void_p))[0] = c.addressof(
self.flash_buffer
)
def init(self) -> None:
self.lib.storage_init(0)
def wipe(self) -> None:
self.lib.storage_wipe()
def check_pin(self, pin: str) -> bool:
return sectrue == self.lib.storage_check_pin(c.c_uint32(int("1" + pin)))
def unlock(self, pin: str) -> bool:
return sectrue == self.lib.storage_unlock(c.c_uint32(int("1" + pin)))
def has_pin(self) -> bool:
return sectrue == self.lib.storage_has_pin()
def change_pin(self, oldpin: str, newpin: str) -> bool:
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return sectrue == self.lib.storage_change_pin(
c.c_uint32(int("1" + oldpin)), c.c_uint32(int("1" + newpin))
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)
def get(self, key: int) -> bytes:
val_ptr = c.c_void_p()
val_len = c.c_uint16()
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if sectrue != self.lib.storage_get(
c.c_uint16(key), c.byref(val_ptr), c.byref(val_len)
):
raise RuntimeError("Failed to find key in storage.")
return c.string_at(val_ptr, size=val_len.value)
def set(self, key: int, val: bytes) -> None:
if sectrue != self.lib.storage_set(c.c_uint16(key), val, c.c_uint16(len(val))):
raise RuntimeError("Failed to set value in storage.")
def _dump(self) -> bytes:
# return just sectors 4 and 16 of the whole flash
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return [
self.flash_buffer[0x010000 : 0x010000 + 0x10000],
self.flash_buffer[0x110000 : 0x110000 + 0x10000],
]
def _get_flash_buffer(self) -> bytes:
return bytes(self.flash_buffer)
def _set_flash_buffer(self, buf: bytes) -> None:
if len(buf) != self.flash_size:
raise RuntimeError("Failed to set flash buffer due to length mismatch.")
self.flash_buffer = buf