annotate hgext/acl.py @ 3975:7b1fce1d5e71

acl: use contexts
author Benoit Boissinot <benoit.boissinot@ens-lyon.org>
date Tue, 26 Dec 2006 03:24:51 +0100
parents 6b4127c7d52a
children 1b5b98837bb5
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1 # acl.py - changeset access control for mercurial
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2 #
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3 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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4 #
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5 # This software may be used and distributed according to the terms
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6 # of the GNU General Public License, incorporated herein by reference.
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7 #
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8 # this hook allows to allow or deny access to parts of a repo when
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9 # taking incoming changesets.
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10 #
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11 # authorization is against local user name on system where hook is
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12 # run, not committer of original changeset (since that is easy to
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13 # spoof).
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14 #
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15 # acl hook is best to use if you use hgsh to set up restricted shells
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16 # for authenticated users to only push to / pull from. not safe if
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17 # user has interactive shell access, because they can disable hook.
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18 # also not safe if remote users share one local account, because then
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19 # no way to tell remote users apart.
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20 #
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21 # to use, configure acl extension in hgrc like this:
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22 #
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23 # [extensions]
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24 # hgext.acl =
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25 #
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26 # [hooks]
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27 # pretxnchangegroup.acl = python:hgext.acl.hook
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28 #
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29 # [acl]
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30 # sources = serve # check if source of incoming changes in this list
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31 # # ("serve" == ssh or http, "push", "pull", "bundle")
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32 #
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33 # allow and deny lists have subtree pattern (default syntax is glob)
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34 # on left, user names on right. deny list checked before allow list.
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35 #
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36 # [acl.allow]
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37 # # if acl.allow not present, all users allowed by default
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38 # # empty acl.allow = no users allowed
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39 # docs/** = doc_writer
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40 # .hgtags = release_engineer
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41 #
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42 # [acl.deny]
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43 # # if acl.deny not present, no users denied by default
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44 # # empty acl.deny = all users allowed
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45 # glob pattern = user4, user5
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46 # ** = user6
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47
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48 from mercurial.i18n import _
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49 from mercurial.node import *
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50 from mercurial import util
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51 import getpass
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52
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53 class checker(object):
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54 '''acl checker.'''
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55
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56 def buildmatch(self, key):
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57 '''return tuple of (match function, list enabled).'''
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58 if not self.ui.has_config(key):
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59 self.ui.debug(_('acl: %s not enabled\n') % key)
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60 return None, False
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61
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62 thisuser = self.getuser()
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63 pats = [pat for pat, users in self.ui.configitems(key)
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64 if thisuser in users.replace(',', ' ').split()]
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65 self.ui.debug(_('acl: %s enabled, %d entries for user %s\n') %
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66 (key, len(pats), thisuser))
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67 if pats:
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68 match = util.matcher(self.repo.root, names=pats)[1]
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69 else:
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70 match = util.never
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71 return match, True
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72
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73 def getuser(self):
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74 '''return name of authenticated user.'''
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75 return self.user
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76
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77 def __init__(self, ui, repo):
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78 self.ui = ui
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79 self.repo = repo
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80 self.user = getpass.getuser()
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81 cfg = self.ui.config('acl', 'config')
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82 if cfg:
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83 self.ui.readsections(cfg, 'acl.allow', 'acl.deny')
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84 self.allow, self.allowable = self.buildmatch('acl.allow')
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85 self.deny, self.deniable = self.buildmatch('acl.deny')
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86
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87 def skipsource(self, source):
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88 '''true if incoming changes from this source should be skipped.'''
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89 ok_sources = self.ui.config('acl', 'sources', 'serve').split()
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90 return source not in ok_sources
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91
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92 def check(self, node):
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93 '''return if access allowed, raise exception if not.'''
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94 files = self.repo.changectx(node).files()
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95 if self.deniable:
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96 for f in files:
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97 if self.deny(f):
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98 self.ui.debug(_('acl: user %s denied on %s\n') %
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99 (self.getuser(), f))
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100 raise util.Abort(_('acl: access denied for changeset %s') %
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101 short(node))
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102 if self.allowable:
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103 for f in files:
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104 if not self.allow(f):
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105 self.ui.debug(_('acl: user %s not allowed on %s\n') %
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106 (self.getuser(), f))
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107 raise util.Abort(_('acl: access denied for changeset %s') %
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108 short(node))
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109 self.ui.debug(_('acl: allowing changeset %s\n') % short(node))
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110
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111 def hook(ui, repo, hooktype, node=None, source=None, **kwargs):
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112 if hooktype != 'pretxnchangegroup':
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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113 raise util.Abort(_('config error - hook type "%s" cannot stop '
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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114 'incoming changesets') % hooktype)
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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115
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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116 c = checker(ui, repo)
ae12e5a2c4a3 add acl extension, to limit who can push to subdirs of central repo.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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117 if c.skipsource(source):
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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118 ui.debug(_('acl: changes have source "%s" - skipping\n') % source)
ae12e5a2c4a3 add acl extension, to limit who can push to subdirs of central repo.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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119 return
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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120
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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121 start = repo.changelog.rev(bin(node))
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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122 end = repo.changelog.count()
ae12e5a2c4a3 add acl extension, to limit who can push to subdirs of central repo.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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123 for rev in xrange(start, end):
ae12e5a2c4a3 add acl extension, to limit who can push to subdirs of central repo.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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124 c.check(repo.changelog.node(rev))