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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.demandload import * | |||
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49 | from mercurial.i18n import gettext as _ | |||
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50 | from mercurial.node import * | |||
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51 | demandload(globals(), 'getpass mercurial:util') | |||
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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, user in self.ui.configitems(key) | |||
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64 | if user == thisuser] | |||
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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.readconfig(cfg) | |||
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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.changelog.read(node)[3] | |||
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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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113 | raise util.Abort(_('config error - hook type "%s" cannot stop ' | |||
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114 | 'incoming changesets') % hooktype) | |||
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115 | ||||
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116 | c = checker(ui, repo) | |||
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117 | if c.skipsource(source): | |||
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118 | ui.debug(_('acl: changes have source "%s" - skipping\n') % source) | |||
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119 | return | |||
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120 | ||||
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121 | start = repo.changelog.rev(bin(node)) | |||
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122 | end = repo.changelog.count() | |||
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123 | for rev in xrange(start, end): | |||
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124 | c.check(repo.changelog.node(rev)) |
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