100 lines
3.6 KiB
Python
100 lines
3.6 KiB
Python
# -*- coding: utf-8 -*-
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#
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# This file is part of Radicale Server - Calendar Server
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# Copyright © 2008 Nicolas Kandel
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# Copyright © 2008 Pascal Halter
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# Copyright © 2008-2013 Guillaume Ayoub
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#
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# This library 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 library 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 Radicale. If not, see <http://www.gnu.org/licenses/>.
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"""
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Rights management.
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Rights are based on a regex-based file whose name is specified in the config
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(section "right", key "file").
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Authentication login is matched against the "user" key, and collection's path
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is matched against the "collection" key. You can use Python's ConfigParser
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interpolation values %(login)s and %(path)s. You can also get groups from the
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user regex in the collection with {0}, {1}, etc.
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Section names are only used for naming the rule.
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Leading or ending slashes are trimmed from collection's path.
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"""
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import re
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import io
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import os.path
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from . import config, log
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# Manage Python2/3 different modules
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# pylint: disable=F0401
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try:
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from configparser import ConfigParser
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except ImportError:
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from ConfigParser import ConfigParser
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# pylint: enable=F0401
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DEFINED_RIGHTS = {
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"owner_write": "[r]\nuser:.*\ncollection:.*\npermission:r\n"
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"[w]\nuser:.*\ncollection:^%(login)s/.+$\npermission:w",
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"owner_only": "[rw]\nuser:.*\ncollection:^%(login)s/.+$\npermission:rw"}
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def _read_from_sections(user, collection, permission):
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"""Get regex sections."""
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filename = os.path.expanduser(config.get("rights", "file"))
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rights_type = config.get("rights", "type").lower()
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regex = ConfigParser({"login": user, "path": collection})
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if rights_type in DEFINED_RIGHTS:
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log.LOGGER.debug("Rights type '%s'" % rights_type)
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regex.readfp(io.BytesIO(DEFINED_RIGHTS[rights_type]))
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elif rights_type == "from_file":
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log.LOGGER.debug("Reading rights from file %s" % filename)
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if not regex.read(filename):
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log.LOGGER.error("File '%s' not found for rights" % filename)
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return False
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else:
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log.LOGGER.error("Unknown rights type '%s'" % rights_type)
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return False
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for section in regex.sections():
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re_user = regex.get(section, "user")
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re_collection = regex.get(section, "collection")
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log.LOGGER.debug(
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"Test if '%s:%s' matches against '%s:%s' from section '%s'" % (
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user, collection, re_user, re_collection, section))
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user_match = re.match(re_user, user)
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if user_match:
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re_collection = re_collection.format(*user_match.groups())
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if re.match(re_collection, collection):
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log.LOGGER.debug("Section '%s' matches" % section)
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if permission in regex.get(section, "permission"):
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return True
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log.LOGGER.debug("Section '%s' does not match" % section)
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return False
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def authorized(user, collection, right):
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"""Check if the user is allowed to read or write the collection."""
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rights_type = config.get("rights", "type").lower()
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return rights_type == "none" or (
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(True if not user else user) and _read_from_sections(
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user if user else "", collection.url.rstrip("/") or "/", right)
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)
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