mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-30 18:10:56 +00:00
64 lines
2.1 KiB
Python
64 lines
2.1 KiB
Python
import ctypes as c
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import os
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sectrue = -1431655766 # 0xAAAAAAAAA
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fname = os.path.join(os.path.dirname(__file__), "libtrezor-storage0.so")
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class Storage:
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def __init__(self) -> None:
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self.lib = c.cdll.LoadLibrary(fname)
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self.flash_size = c.cast(self.lib.FLASH_SIZE, c.POINTER(c.c_uint32))[0]
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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(
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self.flash_buffer
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)
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def init(self) -> None:
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self.lib.storage_init(0)
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def wipe(self) -> None:
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self.lib.storage_wipe()
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def check_pin(self, pin: int) -> bool:
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return sectrue == self.lib.storage_check_pin(c.c_uint32(pin))
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def unlock(self, pin: int) -> bool:
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return sectrue == self.lib.storage_unlock(c.c_uint32(pin))
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def has_pin(self) -> bool:
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return sectrue == self.lib.storage_has_pin()
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def change_pin(self, oldpin: int, newpin: int) -> bool:
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return sectrue == self.lib.storage_change_pin(
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c.c_uint32(oldpin), c.c_uint32(newpin)
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)
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def get(self, key: int) -> bytes:
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val_ptr = c.c_void_p()
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val_len = c.c_uint16()
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if sectrue != self.lib.storage_get(
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c.c_uint16(key), c.byref(val_ptr), c.byref(val_len)
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):
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raise RuntimeError("Failed to find key in storage.")
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return c.string_at(val_ptr, size=val_len.value)
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def set(self, key: int, val: bytes) -> None:
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if sectrue != self.lib.storage_set(c.c_uint16(key), val, c.c_uint16(len(val))):
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raise RuntimeError("Failed to set value in storage.")
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def _dump(self) -> bytes:
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# return just sectors 4 and 16 of the whole flash
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return [
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self.flash_buffer[0x010000 : 0x010000 + 0x10000],
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self.flash_buffer[0x110000 : 0x110000 + 0x10000],
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]
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def _get_flash_buffer(self) -> bytes:
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return bytes(self.flash_buffer)
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def _set_flash_buffer(self, buf: bytes) -> None:
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if len(buf) != self.flash_size:
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raise RuntimeError("Failed to set flash buffer due to length mismatch.")
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self.flash_buffer = buf
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