cryptosign.py 文件源码

def _qrcode_from_signify_ed25519_pubkey(pubkey_file, mode='text'):
    """

    Usage:

    1. Get the OpenBSD 5.7 release public key from here

        http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/etc/signify/Attic/openbsd-57-base.pub?rev=1.1

    2. Generate QR Code and print to terminal

        print(cryptosign._qrcode_from_signify_ed25519_pubkey('openbsd-57-base.pub'))

    3. Compare to (scroll down) QR code here

        https://www.openbsd.org/papers/bsdcan-signify.html
    """
    assert(mode in ['text', 'svg'])

    import pyqrcode

    with open(pubkey_file) as f:
        pubkey = f.read().splitlines()[1]

        qr = pyqrcode.create(pubkey, error='L', mode='binary')

        if mode == 'text':
            return qr.terminal()

        elif mode == 'svg':
            import io
            data_buffer = io.BytesIO()

            qr.svg(data_buffer, omithw=True)

            return data_buffer.getvalue()

        else:
            raise Exception('logic error')