linux-fix-ccid-udev

#!/usr/bin/python

import re
import subprocess
import os

DEVICES = [
    ('0x1050', '0x0111', 'Yubico Yubikey NEO OTP+CCID'),
    ('0x1050', '0x0112', 'Yubico Yubikey NEO CCID'),
    ('0x1050', '0x0115', 'Yubico Yubikey NEO U2F+CCID'),
    ('0x1050', '0x0116', 'Yubico Yubikey NEO OTP+U2F+CCID'),
    ('0x1050', '0x0404', 'Yubico Yubikey 4 CCID'),
    ('0x1050', '0x0405', 'Yubico Yubikey 4 OTP+CCID'),
    ('0x1050', '0x0406', 'Yubico Yubikey 4 U2F+CCID'),
    ('0x1050', '0x0407', 'Yubico Yubikey 4 OTP+U2F+CCID')
]

FNAME = "/etc/libccid_Info.plist"

UDEV = """
ACTION!="add|change", GOTO="u2f_end"

KERNEL=="hidraw*", SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1050", ATTRS{idProduct}=="0113|0114|0115|0116|0120|0402|0403|0406|0407|0410", TAG+="uaccess"

LABEL="u2f_end"
"""

UDEV_FNAME = "/etc/udev/rules.d/70-u2f.rules"


def add_device(dev, content):
    # Parsing XML with regexes, what a wonderful idea!
    names = re.search('<key>ifdFriendlyName</key>\s*<array>(.*?)</array>', content, re.DOTALL)

    if names.group(1).find('<string>%s</string>' % dev[2]) > 0:
        # Already added
        return content

    print ("Adding: %s" % dev[2])

    pos = names.start(1)
    content = content[:pos] + '\n\t\t<string>%s</string>' % dev[2] + content[pos:]

    vids = re.search('<key>ifdVendorID</key>\s*<array>(.*?)</array>', content, re.DOTALL)
    pos = vids.start(1)
    content = content[:pos] + '\n\t\t<string>%s</string>' % dev[0] + content[pos:]

    pids = re.search('<key>ifdProductID</key>\s*<array>(.*?)</array>', content, re.DOTALL)
    pos = pids.start(1)
    content = content[:pos] + '\n\t\t<string>%s</string>' % dev[1] + content[pos:]

    return content

def main():
    # Patch libccid file:
    if os.path.isfile(FNAME):
        print ("Updating %s..." % FNAME)
        with open(FNAME, 'r') as f:
            content = f.read()

        for dev in DEVICES:
            content = add_device(dev, content)

        with open(FNAME, 'w') as f:
            f.write(content)

        print ("Restarting PCSCD...")
        subprocess.call(['service', 'pcscd', 'restart'])
    else:
        print ("libccid_Info.plist not found, skipping...")


    # Add Udev rule:
    if os.path.isfile(UDEV_FNAME):
        print ("Udev rule: %s already exists, skipping..." % UDEV_FNAME)
    else:
        print ("Adding Udev rule for U2F...")
        with open(UDEV_FNAME, 'w') as f:
            f.write(UDEV)
    print ("Done!")

if __name__ == '__main__':
    main()