chipcard 0.1.0

Python package to access chipcards

This project provides an async (anyio) interface to communicate with the pcscd process.

It’s a 100% python implementation, i.e. no C code or C dependencies are involved.

Requirements

• pcscd (apt install pcscd)

• Some async event loop, e.g. trio (venv/bin/pip install trio)

• A smart card that is reachable through pcscd

Example

Code to generate a signature on OpenPGP card:

from anyio import run
from contextlib import suppress
from chipcard import connect_chipcard
from chipcard.card.openpgp import OpenPgpCard

USER_PW = b"123456"

async def main():
    async with connect_chipcard(OpenPgpCard) as card, card.card.transaction():
        await card.select_openpgp()
        await card.unlock_pw1_sign(USER_PW)
        sig = await card.compute_digital_signature(b"Hello, World!")
        print(sig.hex())

with suppress(KeyboardInterrupt):
    run(main, backend="trio")

Development status

It’s currently more of a PoC. API needs to be cleaned up a lot and will probably change in incompatible ways.

Vital features like Secure Messaging are missing entirely. And eventually high level APIs for existing smart cards should be implemented.