trezor-firmware/core/src/storage/resident_credentials.py

from micropython import const

from storage import common

_RESIDENT_CREDENTIAL_START_KEY = const(1)

MAX_RESIDENT_CREDENTIALS = const(100)


def get(index: int) -> bytes | None:
    if not 0 <= index < MAX_RESIDENT_CREDENTIALS:
        raise ValueError  # invalid credential index

    return common.get(common.APP_WEBAUTHN, index + _RESIDENT_CREDENTIAL_START_KEY)


def set(index: int, data: bytes) -> None:
    if not 0 <= index < MAX_RESIDENT_CREDENTIALS:
        raise ValueError  # invalid credential index

    common.set(common.APP_WEBAUTHN, index + _RESIDENT_CREDENTIAL_START_KEY, data)


def delete(index: int) -> None:
    if not 0 <= index < MAX_RESIDENT_CREDENTIALS:
        raise ValueError  # invalid credential index

    common.delete(common.APP_WEBAUTHN, index + _RESIDENT_CREDENTIAL_START_KEY)


def delete_all() -> None:
    for i in range(MAX_RESIDENT_CREDENTIALS):
        common.delete(common.APP_WEBAUTHN, i + _RESIDENT_CREDENTIAL_START_KEY)