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freeipa/ipaserver/plugins/otptoken.py
Stanislav Laznicka 8e4408e678 Reworked the renaming mechanism 
The rename operation on *_mod commands was only allowed when
the primary key of an entry was also its RDN. With these changes,
it should be possible to rename the rest of the entries as well.

An attribute to the base LDAPObject was added to whitelist the
objects we want to allow to be renamed. It replaced an old
attribute rdn_is_primary_key which was used for the very same
purpose but the name was confusing because it was not set
correctly for certain objects.

https://pagure.io/freeipa/issue/2466
https://pagure.io/freeipa/issue/6784

Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Jan Cholasta <jcholast@redhat.com>
Reviewed-By: Martin Basti <mbasti@redhat.com>
2017-03-27 19:08:26 +02:00

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# Authors:
# Nathaniel McCallum <npmccallum@redhat.com>
#
# Copyright (C) 2013 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/>.
from .baseldap import LDAPObject, LDAPAddMember, LDAPRemoveMember
from .baseldap import LDAPCreate, LDAPDelete, LDAPUpdate, LDAPSearch, LDAPRetrieve
from ipalib import api, Int, Str, Bool, DateTime, Flag, Bytes, IntEnum, StrEnum, _, ngettext
from ipalib.plugable import Registry
from ipalib.errors import (
PasswordMismatch,
ConversionError,
NotFound,
ValidationError)
from ipalib.request import context
from ipapython.dn import DN
import base64
import uuid
import os
import six
from six.moves import urllib
if six.PY3:
unicode = str
__doc__ = _("""
OTP Tokens
""") + _("""
Manage OTP tokens.
""") + _("""
IPA supports the use of OTP tokens for multi-factor authentication. This
code enables the management of OTP tokens.
""") + _("""
EXAMPLES:
""") + _("""
Add a new token:
ipa otptoken-add --type=totp --owner=jdoe --desc="My soft token"
""") + _("""
Examine the token:
ipa otptoken-show a93db710-a31a-4639-8647-f15b2c70b78a
""") + _("""
Change the vendor:
ipa otptoken-mod a93db710-a31a-4639-8647-f15b2c70b78a --vendor="Red Hat"
""") + _("""
Delete a token:
ipa otptoken-del a93db710-a31a-4639-8647-f15b2c70b78a
""")
register = Registry()
topic = 'otp'
TOKEN_TYPES = {
u'totp': ['ipatokentotpclockoffset', 'ipatokentotptimestep'],
u'hotp': ['ipatokenhotpcounter']
}
# NOTE: For maximum compatibility, KEY_LENGTH % 5 == 0
KEY_LENGTH = 20
class OTPTokenKey(Bytes):
"""A binary password type specified in base32."""
password = True
def _convert_scalar(self, value, index=None):
if isinstance(value, (tuple, list)) and len(value) == 2:
(p1, p2) = value
if p1 != p2:
raise PasswordMismatch(name=self.name)
value = p1
if isinstance(value, unicode):
try:
value = base64.b32decode(value, True)
except TypeError as e:
raise ConversionError(name=self.name, error=str(e))
return super(OTPTokenKey, self)._convert_scalar(value)
def _convert_owner(userobj, entry_attrs, options):
if 'ipatokenowner' in entry_attrs and not options.get('raw', False):
entry_attrs['ipatokenowner'] = [userobj.get_primary_key_from_dn(o)
for o in entry_attrs['ipatokenowner']]
def _normalize_owner(userobj, entry_attrs):
owner = entry_attrs.get('ipatokenowner', None)
if owner:
try:
entry_attrs['ipatokenowner'] = userobj._normalize_manager(owner)[0]
except NotFound:
userobj.handle_not_found(owner)
def _check_interval(not_before, not_after):
if not_before and not_after:
return not_before <= not_after
return True
def _set_token_type(entry_attrs, **options):
klasses = [x.lower() for x in entry_attrs.get('objectclass', [])]
for ttype in TOKEN_TYPES:
cls = 'ipatoken' + ttype
if cls.lower() in klasses:
entry_attrs['type'] = ttype.upper()
if not options.get('all', False) or options.get('pkey_only', False):
entry_attrs.pop('objectclass', None)
@register()
class otptoken(LDAPObject):
"""
OTP Token object.
"""
container_dn = api.env.container_otp
object_name = _('OTP token')
object_name_plural = _('OTP tokens')
object_class = ['ipatoken']
possible_objectclasses = ['ipatokentotp', 'ipatokenhotp']
default_attributes = [
'ipatokenuniqueid', 'description', 'ipatokenowner',
'ipatokendisabled', 'ipatokennotbefore', 'ipatokennotafter',
'ipatokenvendor', 'ipatokenmodel', 'ipatokenserial', 'managedby'
]
attribute_members = {
'managedby': ['user'],
}
relationships = {
'managedby': ('Managed by', 'man_by_', 'not_man_by_'),
}
allow_rename = True
label = _('OTP Tokens')
label_singular = _('OTP Token')
takes_params = (
Str('ipatokenuniqueid',
cli_name='id',
label=_('Unique ID'),
primary_key=True,
flags=('optional_create'),
),
StrEnum('type?',
label=_('Type'),
doc=_('Type of the token'),
default=u'totp',
autofill=True,
values=tuple(list(TOKEN_TYPES) + [x.upper() for x in TOKEN_TYPES]),
flags=('virtual_attribute', 'no_update'),
),
Str('description?',
cli_name='desc',
label=_('Description'),
doc=_('Token description (informational only)'),
),
Str('ipatokenowner?',
cli_name='owner',
label=_('Owner'),
doc=_('Assigned user of the token (default: self)'),
),
Str('managedby_user?',
label=_('Manager'),
doc=_('Assigned manager of the token (default: self)'),
flags=['no_create', 'no_update', 'no_search'],
),
Bool('ipatokendisabled?',
cli_name='disabled',
label=_('Disabled'),
doc=_('Mark the token as disabled (default: false)')
),
DateTime('ipatokennotbefore?',
cli_name='not_before',
label=_('Validity start'),
doc=_('First date/time the token can be used'),
),
DateTime('ipatokennotafter?',
cli_name='not_after',
label=_('Validity end'),
doc=_('Last date/time the token can be used'),
),
Str('ipatokenvendor?',
cli_name='vendor',
label=_('Vendor'),
doc=_('Token vendor name (informational only)'),
),
Str('ipatokenmodel?',
cli_name='model',
label=_('Model'),
doc=_('Token model (informational only)'),
),
Str('ipatokenserial?',
cli_name='serial',
label=_('Serial'),
doc=_('Token serial (informational only)'),
),
OTPTokenKey('ipatokenotpkey?',
cli_name='key',
label=_('Key'),
doc=_('Token secret (Base32; default: random)'),
default_from=lambda: os.urandom(KEY_LENGTH),
autofill=True,
# force server-side conversion
normalizer=lambda x: x,
flags=('no_display', 'no_update', 'no_search'),
),
StrEnum('ipatokenotpalgorithm?',
cli_name='algo',
label=_('Algorithm'),
doc=_('Token hash algorithm'),
default=u'sha1',
autofill=True,
flags=('no_update'),
values=(u'sha1', u'sha256', u'sha384', u'sha512'),
),
IntEnum('ipatokenotpdigits?',
cli_name='digits',
label=_('Digits'),
doc=_('Number of digits each token code will have'),
values=(6, 8),
default=6,
autofill=True,
flags=('no_update'),
),
Int('ipatokentotpclockoffset?',
cli_name='offset',
label=_('Clock offset'),
doc=_('TOTP token / FreeIPA server time difference'),
default=0,
autofill=True,
flags=('no_update'),
),
Int('ipatokentotptimestep?',
cli_name='interval',
label=_('Clock interval'),
doc=_('Length of TOTP token code validity'),
default=30,
autofill=True,
minvalue=5,
flags=('no_update'),
),
Int('ipatokenhotpcounter?',
cli_name='counter',
label=_('Counter'),
doc=_('Initial counter for the HOTP token'),
default=0,
autofill=True,
minvalue=0,
flags=('no_update'),
),
Str('uri?',
label=_('URI'),
flags={'virtual_attribute', 'no_create', 'no_update', 'no_search'},
),
)
@register()
class otptoken_add(LDAPCreate):
__doc__ = _('Add a new OTP token.')
msg_summary = _('Added OTP token "%(value)s"')
takes_options = LDAPCreate.takes_options + (
Flag('qrcode?', label=_('(deprecated)'), flags=('no_option')),
Flag('no_qrcode', label=_('Do not display QR code'), default=False),
)
def execute(self, ipatokenuniqueid=None, **options):
return super(otptoken_add, self).execute(ipatokenuniqueid, **options)
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
# Fill in a default UUID when not specified.
if entry_attrs.get('ipatokenuniqueid', None) is None:
entry_attrs['ipatokenuniqueid'] = str(uuid.uuid4())
dn = DN("ipatokenuniqueid=%s" % entry_attrs['ipatokenuniqueid'], dn)
if not _check_interval(options.get('ipatokennotbefore', None),
options.get('ipatokennotafter', None)):
raise ValidationError(name='not_after',
error='is before the validity start')
# Set the object class and defaults for specific token types
options['type'] = options['type'].lower()
entry_attrs['objectclass'] = otptoken.object_class + ['ipatoken' + options['type']]
for ttype, tattrs in TOKEN_TYPES.items():
if ttype != options['type']:
for tattr in tattrs:
if tattr in entry_attrs:
del entry_attrs[tattr]
# If owner was not specified, default to the person adding this token.
# If managedby was not specified, attempt a sensible default.
if 'ipatokenowner' not in entry_attrs or 'managedby' not in entry_attrs:
result = self.api.Command.user_find(
whoami=True, no_members=False)['result']
if result:
cur_uid = result[0]['uid'][0]
prev_uid = entry_attrs.setdefault('ipatokenowner', cur_uid)
if cur_uid == prev_uid:
entry_attrs.setdefault('managedby', result[0]['dn'])
# Resolve the owner's dn
_normalize_owner(self.api.Object.user, entry_attrs)
# Get the issuer for the URI
owner = entry_attrs.get('ipatokenowner', None)
issuer = api.env.realm
if owner is not None:
try:
issuer = ldap.get_entry(owner, ['krbprincipalname'])['krbprincipalname'][0]
except (NotFound, IndexError):
pass
# Check if key is not empty
if entry_attrs['ipatokenotpkey'] is None:
raise ValidationError(name='key', error=_(u'cannot be empty'))
# Build the URI parameters
args = {}
args['issuer'] = issuer
args['secret'] = base64.b32encode(entry_attrs['ipatokenotpkey'])
args['digits'] = entry_attrs['ipatokenotpdigits']
args['algorithm'] = entry_attrs['ipatokenotpalgorithm'].upper()
if options['type'] == 'totp':
args['period'] = entry_attrs['ipatokentotptimestep']
elif options['type'] == 'hotp':
args['counter'] = entry_attrs['ipatokenhotpcounter']
# Build the URI
label = urllib.parse.quote(entry_attrs['ipatokenuniqueid'])
parameters = urllib.parse.urlencode(args)
uri = u'otpauth://%s/%s:%s?%s' % (options['type'], issuer, label, parameters)
setattr(context, 'uri', uri)
attrs_list.append("objectclass")
return dn
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
entry_attrs['uri'] = getattr(context, 'uri')
_set_token_type(entry_attrs, **options)
_convert_owner(self.api.Object.user, entry_attrs, options)
return super(otptoken_add, self).post_callback(ldap, dn, entry_attrs, *keys, **options)
@register()
class otptoken_del(LDAPDelete):
__doc__ = _('Delete an OTP token.')
msg_summary = _('Deleted OTP token "%(value)s"')
@register()
class otptoken_mod(LDAPUpdate):
__doc__ = _('Modify a OTP token.')
msg_summary = _('Modified OTP token "%(value)s"')
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
notafter_set = True
notbefore = options.get('ipatokennotbefore', None)
notafter = options.get('ipatokennotafter', None)
# notbefore xor notafter, exactly one of them is not None
if bool(notbefore) ^ bool(notafter):
result = self.api.Command.otptoken_show(keys[-1])['result']
if notbefore is None:
notbefore = result.get('ipatokennotbefore', [None])[0]
if notafter is None:
notafter_set = False
notafter = result.get('ipatokennotafter', [None])[0]
if not _check_interval(notbefore, notafter):
if notafter_set:
raise ValidationError(name='not_after',
error='is before the validity start')
else:
raise ValidationError(name='not_before',
error='is after the validity end')
_normalize_owner(self.api.Object.user, entry_attrs)
# ticket #4681: if the owner of the token is changed and the
# user also manages this token, then we should automatically
# set the 'managedby' attribute to the new owner
if 'ipatokenowner' in entry_attrs and 'managedby' not in entry_attrs:
new_owner = entry_attrs.get('ipatokenowner', None)
prev_entry = ldap.get_entry(dn, attrs_list=['ipatokenowner',
'managedby'])
prev_owner = prev_entry.get('ipatokenowner', None)
prev_managedby = prev_entry.get('managedby', None)
if (new_owner != prev_owner) and (prev_owner == prev_managedby):
entry_attrs.setdefault('managedby', new_owner)
attrs_list.append("objectclass")
return dn
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
_set_token_type(entry_attrs, **options)
_convert_owner(self.api.Object.user, entry_attrs, options)
return super(otptoken_mod, self).post_callback(ldap, dn, entry_attrs, *keys, **options)
@register()
class otptoken_find(LDAPSearch):
__doc__ = _('Search for OTP token.')
msg_summary = ngettext('%(count)d OTP token matched', '%(count)d OTP tokens matched', 0)
def pre_callback(self, ldap, filters, attrs_list, *args, **kwargs):
# This is a hack, but there is no other way to
# replace the objectClass when searching
type = kwargs.get('type', '')
if type not in TOKEN_TYPES:
type = ''
filters = filters.replace("(objectclass=ipatoken)",
"(objectclass=ipatoken%s)" % type)
attrs_list.append("objectclass")
return super(otptoken_find, self).pre_callback(ldap, filters, attrs_list, *args, **kwargs)
def args_options_2_entry(self, *args, **options):
entry = super(otptoken_find, self).args_options_2_entry(*args, **options)
_normalize_owner(self.api.Object.user, entry)
return entry
def post_callback(self, ldap, entries, truncated, *args, **options):
for entry in entries:
_set_token_type(entry, **options)
_convert_owner(self.api.Object.user, entry, options)
return super(otptoken_find, self).post_callback(ldap, entries, truncated, *args, **options)
@register()
class otptoken_show(LDAPRetrieve):
__doc__ = _('Display information about an OTP token.')
def pre_callback(self, ldap, dn, attrs_list, *keys, **options):
attrs_list.append("objectclass")
return super(otptoken_show, self).pre_callback(ldap, dn, attrs_list, *keys, **options)
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
_set_token_type(entry_attrs, **options)
_convert_owner(self.api.Object.user, entry_attrs, options)
return super(otptoken_show, self).post_callback(ldap, dn, entry_attrs, *keys, **options)
@register()
class otptoken_add_managedby(LDAPAddMember):
__doc__ = _('Add users that can manage this token.')
member_attributes = ['managedby']
@register()
class otptoken_remove_managedby(LDAPRemoveMember):
__doc__ = _('Remove users that can manage this token.')
member_attributes = ['managedby']
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