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PyLink/coremods/permissions.py
2019-07-14 15:12:29 -07:00

66 lines
2.7 KiB
Python

"""
permissions.py - Permissions Abstraction for PyLink IRC Services.
"""
import threading
from collections import defaultdict
from pylinkirc import conf, utils
from pylinkirc.log import log
# Global variables: these store mappings of hostmasks/exttargets to lists of permissions each target has.
default_permissions = defaultdict(set)
def add_default_permissions(perms):
"""Adds default permissions to the index."""
global default_permissions
for target, permlist in perms.items():
default_permissions[target] |= set(permlist)
addDefaultPermissions = add_default_permissions
def remove_default_permissions(perms):
"""Remove default permissions from the index."""
global default_permissions
for target, permlist in perms.items():
default_permissions[target] -= set(permlist)
removeDefaultPermissions = remove_default_permissions
def check_permissions(irc, uid, perms, also_show=[]):
"""
Checks permissions of the caller. If the caller has any of the permissions listed in perms,
this function returns True. Otherwise, NotAuthorizedError is raised.
"""
# For old (< 1.1 login blocks):
# If the user is logged in, they automatically have all permissions.
olduser = conf.conf['login'].get('user')
if olduser and irc.match_host('$pylinkacc:%s' % olduser, uid):
log.debug('permissions: overriding permissions check for old-style admin user %s',
irc.get_hostmask(uid))
return True
permissions = defaultdict(set)
# Enumerate the configured permissions list.
for k, v in (conf.conf.get('permissions') or {}).items():
permissions[k] |= set(v)
# Merge in default permissions if enabled.
if conf.conf.get('permissions_merge_defaults', True):
for k, v in default_permissions.items():
permissions[k] |= v
for host, permlist in permissions.items():
log.debug('permissions: permlist for %s: %s', host, permlist)
if irc.match_host(host, uid):
# Now, iterate over all the perms we are looking for.
for perm in permlist:
# Use irc.match_host to expand globs in an IRC-case insensitive and wildcard
# friendly way. e.g. 'xyz.*.#Channel\' will match 'xyz.manage.#channel|' on IRCds
# using the RFC1459 casemapping.
log.debug('permissions: checking if %s glob matches anything in %s', perm, permlist)
if any(irc.match_host(perm, p) for p in perms):
return True
raise utils.NotAuthorizedError("You are missing one of the following permissions: %s" %
(', '.join(perms+also_show)))
checkPermissions = check_permissions