#!/usr/bin/env python
"""
Set up a YubiKey for standard OTP with CR, then remove it.
"""

import sys
import struct
import yubico
import six
import binascii

slot=2

try:
    YK = yubico.find_yubikey(debug=True)
    print("Version : %s " % YK.version())
    print("Status  : %s " % YK.status())

    Cfg = YK.init_config()
    Cfg.extended_flag('ALLOW_UPDATE', True)
    Cfg.ticket_flag('APPEND_CR', True)
    Cfg.extended_flag('SERIAL_API_VISIBLE', True)
    Cfg.uid = binascii.unhexlify('010203040506')
    Cfg.fixed_string("m:ftccftbbftdd")
    Cfg.aes_key('h:' + 32 * 'a')

    user_input = six.moves.input('Write configuration to slot %i of YubiKey? [y/N] : ' % slot )
    if user_input in ('y', 'ye', 'yes'):
        YK.write_config(Cfg, slot=slot)
        print("\nSuccess!")
        print("Status  : %s " % YK.status())
    else:
        print("\nAborted")
        sys.exit(0)

    six.moves.input("Press enter to update...")

    Cfg = YK.init_config(update=True)
    Cfg.ticket_flag('APPEND_CR', False)

    print ("Updating...");
    YK.write_config(Cfg, slot=slot)
    print("\nSuccess!")
except yubico.yubico_exception.YubicoError as inst:
    print("ERROR: %s" % inst.reason)
    sys.exit(1)