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Outside of virtual commands themselves there is no way to evaluate access to perform a virtual operation. Such a capability will be needed for Dogtag-based certificate request validation using Kerberos proxy credentials. Add the 'check_operation_access' method for explicit virtual operation access checks. Refactor 'VirtualCommand.check_access()' to use it. Part of: https://pagure.io/freeipa/issue/5011 Part of: https://pagure.io/freeipa/issue/6423 Reviewed-By: Christian Heimes <cheimes@redhat.com>
87 lines
2.6 KiB
Python
87 lines
2.6 KiB
Python
# Authors:
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# Rob Crittenden <rcritten@redhat.com>
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#
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# Copyright (C) 2009 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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Base classes for non-LDAP backend plugins.
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"""
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import logging
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from ipalib import Command
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from ipalib import errors
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from ipapython.dn import DN
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from ipalib.text import _
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logger = logging.getLogger(__name__)
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class VirtualCommand(Command):
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"""
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A command that doesn't use the LDAP backend but wants to use the
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LDAP access control system to make authorization decisions.
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The class variable operation is the commonName attribute of the
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entry to be tested against.
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In advance, you need to create an entry of the form:
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cn=<operation>, api.env.container_virtual, api.env.basedn
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Ex.
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cn=request certificate, cn=virtual operations,cn=etc, dc=example, dc=com
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"""
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operation = None
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def check_access(self, operation=None):
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"""
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Perform an LDAP query to determine authorization.
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This should be executed before any actual work is done.
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"""
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if self.operation is None and operation is None:
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raise errors.ACIError(info=_('operation not defined'))
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if operation is None:
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operation = self.operation
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logger.debug("IPA: virtual verify %s", operation)
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return check_operation_access(self.api, operation)
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def check_operation_access(api, operation):
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"""
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Check access of bound principal to given operation.
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:return: ``True``
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:raises: ``ACIError`` on access denied or ``NotFound`` for
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unknown virtual operation
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"""
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operationdn = DN(
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('cn', operation), api.env.container_virtual, api.env.basedn)
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try:
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if not api.Backend.ldap2.can_write(operationdn, "objectclass"):
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raise errors.ACIError(
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info=_('not allowed to perform operation: %s') % operation)
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except errors.NotFound:
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raise errors.ACIError(info=_('No such virtual command'))
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return True
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