9 | | === !AuthzPolicy === |
10 | | |
11 | | An example policy based on an Authz-style system has been added. See |
12 | | [source:trunk/sample-plugins/permissions/authz_policy.py] for details. (See also [source:trunk/sample-plugins/permissions] for more samples.) |
13 | | |
14 | | - Install [http://www.voidspace.org.uk/python/configobj.html ConfigObj] (required). |
15 | | - Copy authz_policy.py into your plugins directory. |
16 | | - Put a [http://swapoff.org/files/authzpolicy.conf authzpolicy.conf] file somewhere (preferably on a secured location on the server, not readable for others than the webuser. |
17 | | - Update your `trac.ini`: |
| 12 | A great diversity of permission policies can be implemented, and Trac comes with a few examples. |
| 13 | |
| 14 | Which policies are currently active is determined by a configuration setting in TracIni: |
| 15 | e.g. |
| 16 | {{{ |
| 17 | [trac] |
| 18 | permission_policies = AuthzSourcePolicy, DefaultPermissionPolicy, LegacyAttachmentPolicy |
| 19 | }}} |
| 20 | This lists the [#AuthzSourcePolicy] described below as the first policy, followed by the !DefaultPermissionPolicy which checks for the traditional coarse grained style permissions described in TracPermissions, and the !LegacyAttachmentPolicy which knows how to use the coarse grained permissions for checking the permissions available on attachments. |
| 21 | |
| 22 | Among the possible optional choices, there is [#AuthzPolicy], a very generic permission policy, based on an Authz-style system. See |
| 23 | [trac:source:branches/0.12-stable/tracopt/perm/authz_policy.py authz_policy.py] for details. |
| 24 | |
| 25 | Another popular permission policy [#AuthzSourcePolicy], re-implements the pre-0.12 support for checking fine-grained permissions limited to Subversion repositories in terms of the new system. |
| 26 | |
| 27 | See also [trac:source:branches/0.12-stable/sample-plugins/permissions sample-plugins/permissions] for more examples. |
| 28 | |
| 29 | |
| 30 | === !AuthzPolicy === |
| 31 | ==== Configuration ==== |
| 32 | * Install [http://www.voidspace.org.uk/python/configobj.html ConfigObj] (still needed for 0.12). |
| 33 | * Copy authz_policy.py into your plugins directory. |
| 34 | * Put a [http://swapoff.org/files/authzpolicy.conf authzpolicy.conf] file somewhere, preferably on a secured location on the server, not readable for others than the webuser. If the file contains non-ASCII characters, the UTF-8 encoding should be used. |
| 35 | * Update your `trac.ini`: |
| 36 | 1. modify the [TracIni#trac-section permission_policies] entry in the `[trac]` section |
34 | | A policy will return either `True`, `False` or `None` for a given permission check. |
35 | | Only if the return value is `None` will the ''next'' permission policy be consulted. |
36 | | If no policy explicitly grants the permission, the final result will be `False` |
37 | | (i.e. no permission). |
| 60 | A policy will return either `True`, `False` or `None` for a given permission check. `True` is returned if the policy explicitly grants the permission. `False` is returned if the policy explicitly denies the permission. `None` is returned if the policy is unable to either grant or deny the permission. |
| 61 | |
| 62 | NOTE: Only if the return value is `None` will the ''next'' permission policy be consulted. |
| 63 | If none of the policies explicitly grants the permission, the final result will be `False` |
| 64 | (i.e. permission denied). |
| 65 | |
| 66 | The `authzpolicy.conf` file is a `.ini` style configuration file: |
| 67 | {{{ |
| 68 | [wiki:PrivatePage@*] |
| 69 | john = WIKI_VIEW, !WIKI_MODIFY |
| 70 | jack = WIKI_VIEW |
| 71 | * = |
| 72 | }}} |
| 73 | * Each section of the config is a glob pattern used to match against a Trac resource |
| 74 | descriptor. These descriptors are in the form: |
| 75 | {{{ |
| 76 | <realm>:<id>@<version>[/<realm>:<id>@<version> ...] |
| 77 | }}} |
| 78 | Resources are ordered left to right, from parent to child. If any |
| 79 | component is inapplicable, `*` is substituted. If the version pattern is |
| 80 | not specified explicitely, all versions (`@*`) is added implicitly |
| 81 | |
| 82 | Example: Match the WikiStart page |
| 83 | {{{ |
| 84 | [wiki:*] |
| 85 | [wiki:WikiStart*] |
| 86 | [wiki:WikiStart@*] |
| 87 | [wiki:WikiStart] |
| 88 | }}} |
| 89 | |
| 90 | Example: Match the attachment `wiki:WikiStart@117/attachment/FOO.JPG@*` |
| 91 | on WikiStart |
| 92 | {{{ |
| 93 | [wiki:*] |
| 94 | [wiki:WikiStart*] |
| 95 | [wiki:WikiStart@*] |
| 96 | [wiki:WikiStart@*/attachment/*] |
| 97 | [wiki:WikiStart@117/attachment/FOO.JPG] |
| 98 | }}} |
| 99 | |
| 100 | * Sections are checked against the current Trac resource descriptor '''IN ORDER''' of |
| 101 | appearance in the configuration file. '''ORDER IS CRITICAL'''. |
| 102 | |
| 103 | * Once a section matches, the current username is matched against the keys |
| 104 | (usernames) of the section, '''IN ORDER'''. |
| 105 | * If a key (username) is prefixed with a `@`, it is treated as a group. |
| 106 | * If a value (permission) is prefixed with a `!`, the permission is |
| 107 | denied rather than granted. |
| 108 | |
| 109 | The username will match any of 'anonymous', |
| 110 | 'authenticated', <username> or '*', using normal Trac permission rules. |
56 | | - All versions of WikiStart will be viewable by everybody (including anonymous) |
57 | | - !PrivatePage will be viewable only by john |
58 | | - other pages will be viewable only by john and jack |
59 | | |
60 | | |
61 | | === mod_authz_svn-like permission policy === |
62 | | |
63 | | At the time of this writing, the old fine grained permissions system from Trac 0.10 and before used for restricting access to the repository has not yet been converted to a permission policy component, but from the user point of view, this makes little if no differences. |
| 129 | * All versions of WikiStart will be viewable by everybody (including anonymous) |
| 130 | * !PrivatePage will be viewable only by john |
| 131 | * other pages will be viewable only by john and jack |
| 132 | |
| 133 | Groups: |
| 134 | {{{ |
| 135 | [groups] |
| 136 | admins = john, jack |
| 137 | devs = alice, bob |
| 138 | |
| 139 | [wiki:Dev@*] |
| 140 | @admins = TRAC_ADMIN |
| 141 | @devs = WIKI_VIEW |
| 142 | * = |
| 143 | |
| 144 | [*] |
| 145 | @admins = TRAC_ADMIN |
| 146 | * = |
| 147 | }}} |
| 148 | |
| 149 | Then: |
| 150 | - everything is blocked (whitelist approach), but |
| 151 | - admins get all TRAC_ADMIN everywhere and |
| 152 | - devs can view wiki pages. |
| 153 | |
| 154 | Some repository examples (Browse Source specific): |
| 155 | {{{ |
| 156 | # A single repository: |
| 157 | [repository:test_repo@*] |
| 158 | john = BROWSER_VIEW, FILE_VIEW |
| 159 | # John has BROWSER_VIEW and FILE_VIEW for the entire test_repo |
| 160 | |
| 161 | # All repositories: |
| 162 | [repository:*@*] |
| 163 | jack = BROWSER_VIEW, FILE_VIEW |
| 164 | # John has BROWSER_VIEW and FILE_VIEW for all repositories |
| 165 | }}} |
| 166 | |
| 167 | Very fine grain repository access: |
| 168 | {{{ |
| 169 | # John has BROWSER_VIEW and FILE_VIEW access to trunk/src/some/location/ only |
| 170 | [repository:test_repo@*/source:trunk/src/some/location/*@*] |
| 171 | john = BROWSER_VIEW, FILE_VIEW |
| 172 | |
| 173 | |
| 174 | # John has BROWSER_VIEW and FILE_VIEW access to only revision 1 of all files at trunk/src/some/location only |
| 175 | [repository:test_repo@*/source:trunk/src/some/location/*@1] |
| 176 | john = BROWSER_VIEW, FILE_VIEW |
| 177 | |
| 178 | |
| 179 | # John has BROWSER_VIEW and FILE_VIEW access to all revisions of 'somefile' at trunk/src/some/location only |
| 180 | [repository:test_repo@*/source:trunk/src/some/location/somefile@*] |
| 181 | john = BROWSER_VIEW, FILE_VIEW |
| 182 | |
| 183 | |
| 184 | # John has BROWSER_VIEW and FILE_VIEW access to only revision 1 of 'somefile' at trunk/src/some/location only |
| 185 | [repository:test_repo@*/source:trunk/src/some/location/somefile@1] |
| 186 | john = BROWSER_VIEW, FILE_VIEW |
| 187 | }}} |
| 188 | |
| 189 | Note: In order for Timeline to work/visible for John, we must add CHANGESET_VIEW to the above permission list. |
| 190 | |
| 191 | |
| 192 | === !AuthzSourcePolicy (mod_authz_svn-like permission policy) === #AuthzSourcePolicy |
| 193 | |
| 194 | At the time of this writing, the old fine grained permissions system from Trac 0.11 and before used for restricting access to the repository has been converted to a permission policy component, but from the user point of view, this makes little if no difference. |
100 | | where ''modulename'' refers to the same repository indicated by the `repository_dir` entry in the `[trac]` section. |
| 231 | where ''modulename'' refers to the same repository indicated by the `repository_dir` entry in the `[trac]` section. As an example, if the `repository_dir` entry in the `[trac]` section is {{{/srv/active/svn/blahblah}}}, that would yield the following: |
| 232 | |
| 233 | {{{ |
| 234 | [trac] |
| 235 | authz_file = /path/to/svnaccessfile |
| 236 | authz_module_name = blahblah |
| 237 | ... |
| 238 | repository_dir = /srv/active/svn/blahblah |
| 239 | }}} |
| 240 | |
| 241 | where the svn access file, {{{/path/to/svnaccessfile}}}, contains entries such as {{{[blahblah:/some/path]}}}. |