| 1 |
efrain |
1 |
<?php
|
|
|
2 |
|
|
|
3 |
/**
|
|
|
4 |
* Licensed to Jasig under one or more contributor license
|
|
|
5 |
* agreements. See the NOTICE file distributed with this work for
|
|
|
6 |
* additional information regarding copyright ownership.
|
|
|
7 |
*
|
|
|
8 |
* Jasig licenses this file to you under the Apache License,
|
|
|
9 |
* Version 2.0 (the "License"); you may not use this file except in
|
|
|
10 |
* compliance with the License. You may obtain a copy of the License at:
|
|
|
11 |
*
|
|
|
12 |
* http://www.apache.org/licenses/LICENSE-2.0
|
|
|
13 |
*
|
|
|
14 |
* Unless required by applicable law or agreed to in writing, software
|
|
|
15 |
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
16 |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
17 |
* See the License for the specific language governing permissions and
|
|
|
18 |
* limitations under the License.
|
|
|
19 |
*
|
|
|
20 |
* PHP Version 7
|
|
|
21 |
*
|
|
|
22 |
* @file CAS/ProxyChain.php
|
|
|
23 |
* @category Authentication
|
|
|
24 |
* @package PhpCAS
|
|
|
25 |
* @author Adam Franco <afranco@middlebury.edu>
|
|
|
26 |
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
|
|
|
27 |
* @link https://wiki.jasig.org/display/CASC/phpCAS
|
|
|
28 |
*/
|
|
|
29 |
|
|
|
30 |
/**
|
|
|
31 |
* A normal proxy-chain definition that lists each level of the chain as either
|
|
|
32 |
* a string or regular expression.
|
|
|
33 |
*
|
|
|
34 |
* @class CAS_ProxyChain
|
|
|
35 |
* @category Authentication
|
|
|
36 |
* @package PhpCAS
|
|
|
37 |
* @author Adam Franco <afranco@middlebury.edu>
|
|
|
38 |
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
|
|
|
39 |
* @link https://wiki.jasig.org/display/CASC/phpCAS
|
|
|
40 |
*/
|
|
|
41 |
|
|
|
42 |
class CAS_ProxyChain
|
|
|
43 |
implements CAS_ProxyChain_Interface
|
|
|
44 |
{
|
|
|
45 |
|
|
|
46 |
protected $chain = array();
|
|
|
47 |
|
|
|
48 |
/**
|
|
|
49 |
* A chain is an array of strings or regexp strings that will be matched
|
|
|
50 |
* against. Regexp will be matched with preg_match and strings will be
|
|
|
51 |
* matched from the beginning. A string must fully match the beginning of
|
|
|
52 |
* an proxy url. So you can define a full domain as acceptable or go further
|
|
|
53 |
* down.
|
|
|
54 |
* Proxies have to be defined in reverse from the service to the user. If a
|
|
|
55 |
* user hits service A get proxied via B to service C the list of acceptable
|
|
|
56 |
* proxies on C would be array(B,A);
|
|
|
57 |
*
|
|
|
58 |
* @param array $chain A chain of proxies
|
|
|
59 |
*/
|
|
|
60 |
public function __construct(array $chain)
|
|
|
61 |
{
|
|
|
62 |
// Ensure that we have an indexed array
|
|
|
63 |
$this->chain = array_values($chain);
|
|
|
64 |
}
|
|
|
65 |
|
|
|
66 |
/**
|
|
|
67 |
* Match a list of proxies.
|
|
|
68 |
*
|
|
|
69 |
* @param array $list The list of proxies in front of this service.
|
|
|
70 |
*
|
|
|
71 |
* @return bool
|
|
|
72 |
*/
|
|
|
73 |
public function matches(array $list)
|
|
|
74 |
{
|
|
|
75 |
$list = array_values($list); // Ensure that we have an indexed array
|
|
|
76 |
if ($this->isSizeValid($list)) {
|
|
|
77 |
$mismatch = false;
|
|
|
78 |
foreach ($this->chain as $i => $search) {
|
|
|
79 |
$proxy_url = $list[$i];
|
|
|
80 |
if (preg_match('/^\/.*\/[ixASUXu]*$/s', $search)) {
|
|
|
81 |
if (preg_match($search, $proxy_url)) {
|
|
|
82 |
phpCAS::trace(
|
|
|
83 |
"Found regexp " . $search . " matching " . $proxy_url
|
|
|
84 |
);
|
|
|
85 |
} else {
|
|
|
86 |
phpCAS::trace(
|
|
|
87 |
"No regexp match " . $search . " != " . $proxy_url
|
|
|
88 |
);
|
|
|
89 |
$mismatch = true;
|
|
|
90 |
break;
|
|
|
91 |
}
|
|
|
92 |
} else {
|
|
|
93 |
if (strncasecmp($search, $proxy_url, strlen($search)) == 0) {
|
|
|
94 |
phpCAS::trace(
|
|
|
95 |
"Found string " . $search . " matching " . $proxy_url
|
|
|
96 |
);
|
|
|
97 |
} else {
|
|
|
98 |
phpCAS::trace(
|
|
|
99 |
"No match " . $search . " != " . $proxy_url
|
|
|
100 |
);
|
|
|
101 |
$mismatch = true;
|
|
|
102 |
break;
|
|
|
103 |
}
|
|
|
104 |
}
|
|
|
105 |
}
|
|
|
106 |
if (!$mismatch) {
|
|
|
107 |
phpCAS::trace("Proxy chain matches");
|
|
|
108 |
return true;
|
|
|
109 |
}
|
|
|
110 |
} else {
|
|
|
111 |
phpCAS::trace("Proxy chain skipped: size mismatch");
|
|
|
112 |
}
|
|
|
113 |
return false;
|
|
|
114 |
}
|
|
|
115 |
|
|
|
116 |
/**
|
|
|
117 |
* Validate the size of the the list as compared to our chain.
|
|
|
118 |
*
|
|
|
119 |
* @param array $list List of proxies
|
|
|
120 |
*
|
|
|
121 |
* @return bool
|
|
|
122 |
*/
|
|
|
123 |
protected function isSizeValid (array $list)
|
|
|
124 |
{
|
|
|
125 |
return (sizeof($this->chain) == sizeof($list));
|
|
|
126 |
}
|
|
|
127 |
}
|