mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-17 03:48:09 +00:00
73 lines
1.9 KiB
Python
73 lines
1.9 KiB
Python
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from micropython import const
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from trezor import ui
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from trezor.messages import ButtonRequestType
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from trezor.ui.text import Text
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from apps.common import HARDENED
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from apps.common.confirm import require_confirm
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async def validate_path(ctx, validate_func, **kwargs):
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if not validate_func(**kwargs):
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await show_path_warning(ctx, kwargs["path"])
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async def show_path_warning(ctx, path: list):
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text = Text("Confirm path", ui.ICON_WRONG, icon_color=ui.RED)
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text.normal("The path")
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text.mono(*break_address_n_to_lines(path))
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text.normal("seems unusual.")
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text.normal("Are you sure?")
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return await require_confirm(
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ctx, text, code=ButtonRequestType.UnknownDerivationPath
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)
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def validate_path_for_get_public_key(path: list, slip44_id: int) -> bool:
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"""
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Checks if path has at least three hardened items and slip44 id matches.
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The path is allowed to have more than three items, but all the following
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items have to be non-hardened.
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"""
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length = len(path)
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if length < 3 or length > 5:
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return False
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if path[0] != 44 | HARDENED:
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return False
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if path[1] != slip44_id | HARDENED:
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return False
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if path[2] < HARDENED or path[2] > 20 | HARDENED:
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return False
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if length > 3 and is_hardened(path[3]):
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return False
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if length > 4 and is_hardened(path[4]):
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return False
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return True
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def is_hardened(i: int) -> bool:
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if i & HARDENED:
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return True
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return False
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def break_address_n_to_lines(address_n: list) -> list:
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def path_item(i: int):
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if i & HARDENED:
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return str(i ^ HARDENED) + "'"
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else:
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return str(i)
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lines = []
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path_str = "m/" + "/".join([path_item(i) for i in address_n])
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per_line = const(17)
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while len(path_str) > per_line:
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i = path_str[:per_line].rfind("/")
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lines.append(path_str[:i])
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path_str = path_str[i:]
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lines.append(path_str)
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return lines
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