-
Notifications
You must be signed in to change notification settings - Fork 0
/
img_auth.php
159 lines (139 loc) · 5.13 KB
/
img_auth.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
<?php
/**
* Image authorisation script
*
* To use this, see http://www.mediawiki.org/wiki/Manual:Image_Authorization
*
* - Set $wgUploadDirectory to a non-public directory (not web accessible)
* - Set $wgUploadPath to point to this file
*
* Optional Parameters
*
* - Set $wgImgAuthDetails = true if you want the reason the access was denied messages to
* be displayed instead of just the 403 error (doesn't work on IE anyway),
* otherwise it will only appear in error logs
* - Set $wgImgAuthPublicTest false if you don't want to just check and see if all are public
* must be set to false if using specific restrictions such as LockDown or NSFileRepo
*
* For security reasons, you usually don't want your user to know *why* access was denied,
* just that it was. If you want to change this, you can set $wgImgAuthDetails to 'true'
* in localsettings.php and it will give the user the reason why access was denied.
*
* Your server needs to support PATH_INFO; CGI-based configurations usually don't.
*
* @file
*
**/
define( 'MW_NO_OUTPUT_COMPRESSION', 1 );
if ( isset( $_SERVER['MW_COMPILED'] ) ) {
require ( 'phase3/includes/WebStart.php' );
} else {
require ( dirname( __FILE__ ) . '/includes/WebStart.php' );
}
wfProfileIn( 'img_auth.php' );
# Set action base paths so that WebRequest::getPathInfo()
# recognizes the "X" as the 'title' in ../image_auth/X urls.
$wgArticlePath = false; # Don't let a "/*" article path clober our action path
$wgActionPaths = array( "$wgUploadPath/" );
wfImageAuthMain();
wfProfileOut( 'img_auth.php' );
wfLogProfilingData();
function wfImageAuthMain() {
global $wgImgAuthPublicTest, $wgRequest, $wgUploadDirectory;
// See if this is a public Wiki (no protections).
if ( $wgImgAuthPublicTest
&& in_array( 'read', User::getGroupPermissions( array( '*' ) ), true ) )
{
// This is a public wiki, so disable this script (for private wikis only)
wfForbidden( 'img-auth-accessdenied', 'img-auth-public' );
return;
}
// Get the requested file path (source file or thumbnail)
$matches = WebRequest::getPathInfo();
if ( !isset( $matches['title'] ) ) {
wfForbidden( 'img-auth-accessdenied', 'img-auth-nopathinfo' );
return;
}
$path = $matches['title'];
if ( $path && $path[0] !== '/' ) {
// Make sure $path has a leading /
$path = "/" . $path;
}
// Check for bug 28235: QUERY_STRING overriding the correct extension
$whitelist = array();
$dotPos = strrpos( $path, '.' );
if ( $dotPos !== false ) {
$whitelist[] = substr( $path, $dotPos + 1 );
}
if ( !$wgRequest->checkUrlExtension( $whitelist ) ) {
return;
}
// Get the local file repository
$repo = RepoGroup::singleton()->getRepo( 'local' );
// Get the full file storage path and extract the source file name.
// (e.g. 120px-Foo.png => Foo.png or page2-120px-Foo.png => Foo.png).
// This only applies to thumbnails, and all thumbnails should
// be under a folder that has the source file name.
if ( strpos( $path, '/thumb/' ) === 0 ) {
$name = wfBaseName( dirname( $path ) ); // file is a thumbnail
$filename = $repo->getZonePath( 'thumb' ) . substr( $path, 6 ); // strip "/thumb"
} else {
$name = wfBaseName( $path ); // file is a source file
$filename = $repo->getZonePath( 'public' ) . $path;
}
// Check to see if the file exists
if ( !$repo->fileExists( $filename, FileRepo::FILES_ONLY ) ) {
wfForbidden( 'img-auth-accessdenied','img-auth-nofile', $filename );
return;
}
$title = Title::makeTitleSafe( NS_FILE, $name );
if ( !$title instanceof Title ) { // files have valid titles
wfForbidden( 'img-auth-accessdenied', 'img-auth-badtitle', $name );
return;
}
// Run hook for extension authorization plugins
if ( !Hooks::run( 'ImgAuthBeforeStream', array( &$title, &$path, &$name, &$result ) ) ) {
wfForbidden( $result[0], $result[1], array_slice( $result, 2 ) );
return;
}
// Check user authorization for this title
// Checks Whitelist too
if ( !$title->userCan( 'read' ) ) {
wfForbidden( 'img-auth-accessdenied', 'img-auth-noread', $name );
return;
}
// Stream the requested file
wfDebugLog( 'img_auth', "Streaming `".$filename."`." );
$repo->streamFile( $filename, array( 'Cache-Control: private', 'Vary: Cookie' ) );
}
/**
* Issue a standard HTTP 403 Forbidden header ($msg1-a message index, not a message) and an
* error message ($msg2, also a message index), (both required) then end the script
* subsequent arguments to $msg2 will be passed as parameters only for replacing in $msg2
* @param $msg1
* @param $msg2
*/
function wfForbidden( $msg1, $msg2 ) {
global $wgImgAuthDetails;
$args = func_get_args();
array_shift( $args );
array_shift( $args );
$msgHdr = htmlspecialchars( wfMsg( $msg1 ) );
$detailMsgKey = $wgImgAuthDetails ? $msg2 : 'badaccess-group0';
$detailMsg = htmlspecialchars( wfMsg( $detailMsgKey, $args ) );
wfDebugLog( 'img_auth',
"wfForbidden Hdr:" . wfMsgExt( $msg1, array( 'language' => 'en' ) ). " Msg: ".
wfMsgExt( $msg2, array( 'language' => 'en' ), $args )
);
header( 'HTTP/1.0 403 Forbidden' );
header( 'Cache-Control: no-cache' );
header( 'Content-Type: text/html; charset=utf-8' );
echo <<<ENDS
<html>
<body>
<h1>$msgHdr</h1>
<p>$detailMsg</p>
</body>
</html>
ENDS;
}