|
|
# acl.py - changeset access control for mercurial
|
|
|
#
|
|
|
# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
|
|
|
'''hooks for controlling repository access
|
|
|
|
|
|
This hook makes it possible to allow or deny write access to given
|
|
|
branches and paths of a repository when receiving incoming changesets
|
|
|
via pretxnchangegroup and pretxncommit.
|
|
|
|
|
|
The authorization is matched based on the local user name on the
|
|
|
system where the hook runs, and not the committer of the original
|
|
|
changeset (since the latter is merely informative).
|
|
|
|
|
|
The acl hook is best used along with a restricted shell like hgsh,
|
|
|
preventing authenticating users from doing anything other than pushing
|
|
|
or pulling. The hook is not safe to use if users have interactive
|
|
|
shell access, as they can then disable the hook. Nor is it safe if
|
|
|
remote users share an account, because then there is no way to
|
|
|
distinguish them.
|
|
|
|
|
|
The order in which access checks are performed is:
|
|
|
|
|
|
1) Deny list for branches (section ``acl.deny.branches``)
|
|
|
2) Allow list for branches (section ``acl.allow.branches``)
|
|
|
3) Deny list for paths (section ``acl.deny``)
|
|
|
4) Allow list for paths (section ``acl.allow``)
|
|
|
|
|
|
The allow and deny sections take key-value pairs.
|
|
|
|
|
|
Branch-based Access Control
|
|
|
---------------------------
|
|
|
|
|
|
Use the ``acl.deny.branches`` and ``acl.allow.branches`` sections to
|
|
|
have branch-based access control. Keys in these sections can be
|
|
|
either:
|
|
|
|
|
|
- a branch name, or
|
|
|
- an asterisk, to match any branch;
|
|
|
|
|
|
The corresponding values can be either:
|
|
|
|
|
|
- a comma-separated list containing users and groups, or
|
|
|
- an asterisk, to match anyone;
|
|
|
|
|
|
Path-based Access Control
|
|
|
-------------------------
|
|
|
|
|
|
Use the ``acl.deny`` and ``acl.allow`` sections to have path-based
|
|
|
access control. Keys in these sections accept a subtree pattern (with
|
|
|
a glob syntax by default). The corresponding values follow the same
|
|
|
syntax as the other sections above.
|
|
|
|
|
|
Groups
|
|
|
------
|
|
|
|
|
|
Group names must be prefixed with an ``@`` symbol. Specifying a group
|
|
|
name has the same effect as specifying all the users in that group.
|
|
|
|
|
|
Example Configuration
|
|
|
---------------------
|
|
|
|
|
|
::
|
|
|
|
|
|
[hooks]
|
|
|
|
|
|
# Use this if you want to check access restrictions at commit time
|
|
|
pretxncommit.acl = python:hgext.acl.hook
|
|
|
|
|
|
# Use this if you want to check access restrictions for pull, push,
|
|
|
# bundle and serve.
|
|
|
pretxnchangegroup.acl = python:hgext.acl.hook
|
|
|
|
|
|
[acl]
|
|
|
# Check whether the source of incoming changes is in this list where
|
|
|
# "serve" == ssh or http, and "push", "pull" and "bundle" are the
|
|
|
# corresponding hg commands.
|
|
|
sources = serve
|
|
|
|
|
|
[acl.deny.branches]
|
|
|
|
|
|
# Everyone is denied to the frozen branch:
|
|
|
frozen-branch = *
|
|
|
|
|
|
# A bad user is denied on all branches:
|
|
|
* = bad-user
|
|
|
|
|
|
[acl.allow.branches]
|
|
|
|
|
|
# A few users are allowed on branch-a:
|
|
|
branch-a = user-1, user-2, user-3
|
|
|
|
|
|
# Only one user is allowed on branch-b:
|
|
|
branch-b = user-1
|
|
|
|
|
|
# The super user is allowed on any branch:
|
|
|
* = super-user
|
|
|
|
|
|
# Everyone is allowed on branch-for-tests:
|
|
|
branch-for-tests = *
|
|
|
|
|
|
[acl.deny]
|
|
|
# This list is checked first. If a match is found, acl.allow is not
|
|
|
# checked. All users are granted access if acl.deny is not present.
|
|
|
# Format for both lists: glob pattern = user, ..., @group, ...
|
|
|
|
|
|
# To match everyone, use an asterisk for the user:
|
|
|
# my/glob/pattern = *
|
|
|
|
|
|
# user6 will not have write access to any file:
|
|
|
** = user6
|
|
|
|
|
|
# Group "hg-denied" will not have write access to any file:
|
|
|
** = @hg-denied
|
|
|
|
|
|
# Nobody will be able to change "DONT-TOUCH-THIS.txt", despite
|
|
|
# everyone being able to change all other files. See below.
|
|
|
src/main/resources/DONT-TOUCH-THIS.txt = *
|
|
|
|
|
|
[acl.allow]
|
|
|
# if acl.allow not present, all users allowed by default
|
|
|
# empty acl.allow = no users allowed
|
|
|
|
|
|
# User "doc_writer" has write access to any file under the "docs"
|
|
|
# folder:
|
|
|
docs/** = doc_writer
|
|
|
|
|
|
# User "jack" and group "designers" have write access to any file
|
|
|
# under the "images" folder:
|
|
|
images/** = jack, @designers
|
|
|
|
|
|
# Everyone (except for "user6" - see acl.deny above) will have write
|
|
|
# access to any file under the "resources" folder (except for 1
|
|
|
# file. See acl.deny):
|
|
|
src/main/resources/** = *
|
|
|
|
|
|
.hgtags = release_engineer
|
|
|
|
|
|
'''
|
|
|
|
|
|
from mercurial.i18n import _
|
|
|
from mercurial import util, match
|
|
|
import getpass, urllib, grp
|
|
|
|
|
|
def _getusers(ui, group):
|
|
|
|
|
|
# First, try to use group definition from section [acl.groups]
|
|
|
hgrcusers = ui.configlist('acl.groups', group)
|
|
|
if hgrcusers:
|
|
|
return hgrcusers
|
|
|
|
|
|
ui.debug('acl: "%s" not defined in [acl.groups]\n' % group)
|
|
|
# If no users found in group definition, get users from OS-level group
|
|
|
return grp.getgrnam(group).gr_mem
|
|
|
|
|
|
def _usermatch(ui, user, usersorgroups):
|
|
|
|
|
|
if usersorgroups == '*':
|
|
|
return True
|
|
|
|
|
|
for ug in usersorgroups.replace(',', ' ').split():
|
|
|
if user == ug or ug.find('@') == 0 and user in _getusers(ui, ug[1:]):
|
|
|
return True
|
|
|
|
|
|
return False
|
|
|
|
|
|
def buildmatch(ui, repo, user, key):
|
|
|
'''return tuple of (match function, list enabled).'''
|
|
|
if not ui.has_section(key):
|
|
|
ui.debug('acl: %s not enabled\n' % key)
|
|
|
return None
|
|
|
|
|
|
pats = [pat for pat, users in ui.configitems(key)
|
|
|
if _usermatch(ui, user, users)]
|
|
|
ui.debug('acl: %s enabled, %d entries for user %s\n' %
|
|
|
(key, len(pats), user))
|
|
|
|
|
|
if not repo:
|
|
|
if pats:
|
|
|
return lambda b: '*' in pats or b in pats
|
|
|
return lambda b: False
|
|
|
|
|
|
if pats:
|
|
|
return match.match(repo.root, '', pats)
|
|
|
return match.exact(repo.root, '', [])
|
|
|
|
|
|
|
|
|
def hook(ui, repo, hooktype, node=None, source=None, **kwargs):
|
|
|
if hooktype not in ['pretxnchangegroup', 'pretxncommit']:
|
|
|
raise util.Abort(_('config error - hook type "%s" cannot stop '
|
|
|
'incoming changesets nor commits') % hooktype)
|
|
|
if (hooktype == 'pretxnchangegroup' and
|
|
|
source not in ui.config('acl', 'sources', 'serve').split()):
|
|
|
ui.debug('acl: changes have source "%s" - skipping\n' % source)
|
|
|
return
|
|
|
|
|
|
user = None
|
|
|
if source == 'serve' and 'url' in kwargs:
|
|
|
url = kwargs['url'].split(':')
|
|
|
if url[0] == 'remote' and url[1].startswith('http'):
|
|
|
user = urllib.unquote(url[3])
|
|
|
|
|
|
if user is None:
|
|
|
user = getpass.getuser()
|
|
|
|
|
|
cfg = ui.config('acl', 'config')
|
|
|
if cfg:
|
|
|
ui.readconfig(cfg, sections = ['acl.groups', 'acl.allow.branches',
|
|
|
'acl.deny.branches', 'acl.allow', 'acl.deny'])
|
|
|
|
|
|
allowbranches = buildmatch(ui, None, user, 'acl.allow.branches')
|
|
|
denybranches = buildmatch(ui, None, user, 'acl.deny.branches')
|
|
|
allow = buildmatch(ui, repo, user, 'acl.allow')
|
|
|
deny = buildmatch(ui, repo, user, 'acl.deny')
|
|
|
|
|
|
for rev in xrange(repo[node], len(repo)):
|
|
|
ctx = repo[rev]
|
|
|
branch = ctx.branch()
|
|
|
if denybranches and denybranches(branch):
|
|
|
raise util.Abort(_('acl: user "%s" denied on branch "%s"'
|
|
|
' (changeset "%s")')
|
|
|
% (user, branch, ctx))
|
|
|
if allowbranches and not allowbranches(branch):
|
|
|
raise util.Abort(_('acl: user "%s" not allowed on branch "%s"'
|
|
|
' (changeset "%s")')
|
|
|
% (user, branch, ctx))
|
|
|
ui.debug('acl: branch access granted: "%s" on branch "%s"\n'
|
|
|
% (ctx, branch))
|
|
|
|
|
|
for f in ctx.files():
|
|
|
if deny and deny(f):
|
|
|
ui.debug('acl: user %s denied on %s\n' % (user, f))
|
|
|
raise util.Abort(_('acl: access denied for changeset %s') % ctx)
|
|
|
if allow and not allow(f):
|
|
|
ui.debug('acl: user %s not allowed on %s\n' % (user, f))
|
|
|
raise util.Abort(_('acl: access denied for changeset %s') % ctx)
|
|
|
ui.debug('acl: allowing changeset %s\n' % ctx)
|
|
|
|