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# Authors:
# Rob Crittenden <rcritten@redhat.com>
#
# Copyright (C) 2008 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 logging
import six
from ipalib import api, errors, krb_utils
from ipalib import Command
from ipalib import Password
from ipalib import _
from ipalib import output
from ipalib.parameters import Principal
from ipalib.plugable import Registry
from ipalib.request import context
from ipapython import kerberos
from ipapython.dn import DN
from ipaserver.plugins.baseuser import normalize_user_principal
from ipaserver.plugins.service import validate_realm
if six.PY3:
unicode = str
__doc__ = _("""
Set a user's password
If someone other than a user changes that user's password (e.g., Helpdesk
resets it) then the password will need to be changed the first time it
is used. This is so the end-user is the only one who knows the password.
The IPA password policy controls how often a password may be changed,
what strength requirements exist, and the length of the password history.
If the user authentication method is set to password+OTP, the user should
pass the --otp option when resetting the password.
EXAMPLES:
To reset your own password:
ipa passwd
To reset your own password when password+OTP is set as authentication method:
ipa passwd --otp
To change another user's password:
ipa passwd tuser1
""")
logger = logging.getLogger(__name__)
register = Registry()
# We only need to prompt for the current password when changing a password
# for yourself, but the parameter is still required
MAGIC_VALUE = u'CHANGING_PASSWORD_FOR_ANOTHER_USER'
def get_current_password(principal):
"""
If the user is changing their own password then return None so the
current password is prompted for, otherwise return a fixed value to
be ignored later.
"""
current_principal = krb_utils.get_principal()
if current_principal == unicode(normalize_user_principal(principal)):
return None
else:
return MAGIC_VALUE
@register()
class passwd(Command):
__doc__ = _("Set a user's password.")
takes_args = (
Principal(
'principal',
validate_realm,
cli_name='user',
label=_('User name'),
primary_key=True,
autofill=True,
default_from=lambda: kerberos.Principal(krb_utils.get_principal()),
normalizer=lambda value: normalize_user_principal(value),
),
Password('password',
label=_('New Password'),
),
Password('current_password',
label=_('Current Password'),
confirm=False,
default_from=lambda principal: get_current_password(principal),
autofill=True,
),
)
takes_options = (
Password('otp?',
label=_('OTP'),
doc=_('The OTP if the user has a token configured'),
confirm=False,
),
)
has_output = output.simple_value
msg_summary = _('Changed password for "%(value)s"')
def execute(self, principal, password, current_password, **options):
"""
Execute the passwd operation.
The dn should not be passed as a keyword argument as it is constructed
by this method.
Returns the entry
:param principal: The login name or principal of the user
:param password: the new password
:param current_password: the existing password, if applicable
"""
ldap = self.api.Backend.ldap2
principal = unicode(principal)
entry_attrs = ldap.find_entry_by_attr(
'krbprincipalname', principal, 'posixaccount', [''],
DN(api.env.container_user, api.env.basedn)
)
if principal == getattr(context, 'principal', None) and \
current_password == MAGIC_VALUE:
# No cheating
logger.warning('User attempted to change password using magic '
'value')
raise errors.ACIError(info=_('Invalid credentials'))
if current_password == MAGIC_VALUE:
ldap.modify_password(entry_attrs.dn, password)
else:
otp = options.get('otp')
ldap.modify_password(entry_attrs.dn, password, current_password, otp)
return dict(
result=True,
value=principal,
)
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