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# Authors:
# Nathaniel McCallum <npmccallum@redhat.com>
#
# Copyright (C) 2014 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
import six
import usb.core
import yubico
from ipalib import _, IntEnum
from ipalib.errors import NotFound
from ipalib.frontend import Command, Method, Object
from ipalib.plugable import Registry
if six.PY3:
unicode = str
__doc__ = _("""
YubiKey Tokens
""") + _("""
Manage YubiKey tokens.
""") + _("""
This code is an extension to the otptoken plugin and provides support for
reading/writing YubiKey tokens directly.
""") + _("""
EXAMPLES:
""") + _("""
Add a new token:
ipa otptoken-add-yubikey --owner=jdoe --desc="My YubiKey"
""")
register = Registry()
topic = 'otp'
@register(no_fail=True)
class _fake_otptoken(Object):
name = 'otptoken'
@register(no_fail=True)
class _fake_otptoken_add(Method):
name = 'otptoken_add'
NO_CLI = True
@register()
class otptoken_add_yubikey(Command):
__doc__ = _('Add a new YubiKey OTP token.')
takes_options = (
IntEnum('slot?',
cli_name='slot',
label=_('YubiKey slot'),
values=(1, 2),
),
)
has_output_params = takes_options
@property
def NO_CLI(self):
return self.api.Command.otptoken_add.NO_CLI
def get_args(self):
for arg in self.api.Command.otptoken_add.args():
yield arg
for arg in super(otptoken_add_yubikey, self).get_args():
yield arg
def get_options(self):
for option in self.api.Command.otptoken_add.options():
if option.name not in ('type',
'ipatokenvendor',
'ipatokenmodel',
'ipatokenserial',
'ipatokenotpalgorithm',
'ipatokenhotpcounter',
'ipatokenotpkey',
'ipatokentotpclockoffset',
'ipatokentotptimestep',
'no_qrcode',
'qrcode',
'version'):
yield option
for option in super(otptoken_add_yubikey, self).get_options():
yield option
def _iter_output(self):
return self.api.Command.otptoken_add.output()
def forward(self, *args, **kwargs):
# Open the YubiKey
try:
yk = yubico.find_yubikey()
except usb.core.USBError as e:
raise NotFound(reason="No YubiKey found: %s" % e.strerror)
except yubico.yubikey.YubiKeyError as e:
raise NotFound(reason=e.reason)
assert yk.version_num() >= (2, 1)
# If no slot is specified, find the first free slot.
if kwargs.get('slot', None) is None:
try:
used = yk.status().valid_configs()
kwargs['slot'] = sorted({1, 2}.difference(used))[0]
except IndexError:
raise NotFound(reason=_('No free YubiKey slot!'))
# Create the key (NOTE: the length is fixed).
key = os.urandom(20)
# Write the config.
cfg = yk.init_config()
cfg.mode_oath_hotp(key, kwargs['ipatokenotpdigits'])
cfg.extended_flag('SERIAL_API_VISIBLE', True)
yk.write_config(cfg, slot=kwargs['slot'])
# Filter the options we want to pass.
options = {k: v for k, v in kwargs.items() if k in (
'version',
'description',
'ipatokenowner',
'ipatokendisabled',
'ipatokennotbefore',
'ipatokennotafter',
'ipatokenotpdigits',
)}
# Run the command.
answer = self.Backend.rpcclient.forward('otptoken_add',
*args,
type=u'hotp',
ipatokenvendor=u'YubiCo',
ipatokenmodel=unicode(yk.model),
ipatokenserial=unicode(yk.serial()),
ipatokenotpalgorithm=u'sha1',
ipatokenhotpcounter=0,
ipatokenotpkey=key,
no_qrcode=True,
**options)
# Suppress values we don't want to return.
for k in (u'uri', u'ipatokenotpkey'):
if k in answer.get('result', {}):
del answer['result'][k]
# Return which slot was used for writing.
answer.get('result', {})['slot'] = kwargs['slot']
return answer
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