commit | author | age
|
36cae3
|
1 |
# uphpCAS |
JK |
2 |
|
|
3 |
Simple PHP library for CAS authentication |
|
4 |
|
7ee2b2
|
5 |
[![Build Status](https://travis-ci.org/jacekkow/uphpCAS.svg?branch=master)](https://travis-ci.org/jacekkow/uphpCAS) |
JK |
6 |
|
36cae3
|
7 |
## Introduction |
JK |
8 |
|
|
9 |
This library intends to be a replacement for overly complex |
|
10 |
[phpCAS](https://wiki.jasig.org/display/casc/phpcas) library. |
|
11 |
|
|
12 |
It only supports basic [CAS protocol](http://jasig.github.io/cas/4.0.x/protocol/CAS-Protocol.html), |
|
13 |
without proxying capabilities, which is enough for website authentication. |
|
14 |
|
|
15 |
## Usage |
|
16 |
|
|
17 |
### Composer |
|
18 |
|
|
19 |
1. Add jacekkow/uphpcas dependency: |
|
20 |
|
|
21 |
```bash |
|
22 |
composer require jacekkow/uphpcas |
|
23 |
``` |
|
24 |
|
|
25 |
1. Include autoloader in your application: |
|
26 |
|
|
27 |
```php |
|
28 |
<?php |
|
29 |
require_once(__DIR__ . '/vendor/autoload.php'); |
|
30 |
``` |
|
31 |
|
|
32 |
1. See the usage examples below |
|
33 |
|
|
34 |
### Raw usage |
|
35 |
|
|
36 |
1. Download [uphpCAS.php](https://raw.githubusercontent.com/jacekkow/uphpCAS/master/uphpCAS.php) |
|
37 |
1. Include it in your application: |
|
38 |
|
|
39 |
```php |
|
40 |
<?php |
|
41 |
require_once(__DIR__ . '/uphpCAS.php'); |
|
42 |
``` |
|
43 |
|
|
44 |
1. See the usage examples below |
|
45 |
|
|
46 |
## Examples |
|
47 |
|
|
48 |
### Require authentication |
|
49 |
|
|
50 |
To require authentication to access the page: |
|
51 |
|
|
52 |
```php |
|
53 |
<?php |
|
54 |
require_once('uphpCAS.php'); |
|
55 |
|
|
56 |
try { |
|
57 |
$cas = new uphpCAS('https://cas.server.local/cas'); |
|
58 |
$user = $cas->authenticate(); |
|
59 |
|
|
60 |
echo 'Authenticated as '.$user->user; |
|
61 |
} catch(Exception $e) { |
|
62 |
echo 'Jasig authentication failed: '.$e->getMessage(); |
|
63 |
die(); |
|
64 |
} |
|
65 |
``` |
|
66 |
|
|
67 |
### Login and logout pages |
|
68 |
|
|
69 |
index.php: |
|
70 |
|
|
71 |
```php |
|
72 |
<?php |
|
73 |
require_once('uphpCAS.php'); |
|
74 |
|
|
75 |
$cas = new uphpCAS(); |
|
76 |
if($cas->isAuthenticated()) { |
|
77 |
$user = $cas->authenticate(); |
|
78 |
echo 'Authenticated as '.$user->user; |
|
79 |
} else { |
|
80 |
echo 'Not authenticated. <a href="login.php">Log in</a>'; |
|
81 |
} |
|
82 |
``` |
|
83 |
|
|
84 |
login.php: |
|
85 |
|
|
86 |
```php |
|
87 |
<?php |
|
88 |
require_once('uphpCAS.php'); |
|
89 |
|
|
90 |
try { |
|
91 |
$cas = new uphpCAS('https://cas.server.local/cas'); |
|
92 |
$user = $cas->authenticate(); |
|
93 |
|
|
94 |
header('Location: index.php'); |
|
95 |
} catch(Exception $e) { |
|
96 |
echo 'Jasig authentication failed: '.$e->getMessage(); |
|
97 |
die(); |
|
98 |
} |
|
99 |
``` |
|
100 |
|
|
101 |
logout.php: |
|
102 |
|
|
103 |
```php |
|
104 |
<?php |
|
105 |
require_once('uphpCAS.php'); |
|
106 |
|
|
107 |
try { |
|
108 |
$cas = new uphpCAS('https://cas.server.local/cas'); |
|
109 |
$user = $cas->logout(); |
|
110 |
} catch(Exception $e) { |
|
111 |
echo 'Jasig authentication failed: '.$e->getMessage(); |
|
112 |
die(); |
|
113 |
} |
|
114 |
``` |
|
115 |
|
|
116 |
## Common issues |
|
117 |
|
|
118 |
### Invalid redirection from CAS server |
|
119 |
|
|
120 |
By default uphpCAS tries to guess correct URL to pass to CAS server |
|
121 |
as a "service" parameter using values from $_SERVER superglobal |
|
122 |
(see getCurrentUrl() method). This URL is used by CAS server |
|
123 |
to redirect user back to the application after successful CAS login. |
|
124 |
|
|
125 |
If this guess is incorrect, eg. when the server is behind proxy, |
|
126 |
you can override it using setServiceUrl() method: |
|
127 |
|
|
128 |
```php |
|
129 |
$cas = new uphpCAS('https://cas.server.local/cas'); |
|
130 |
$cas->setServiceUrl('https://service.local/subpage'); |
|
131 |
``` |
|
132 |
|
|
133 |
or second argument of the constructor: |
|
134 |
|
|
135 |
```php |
|
136 |
$cas = new uphpCAS('https://cas.server.local/cas'), |
|
137 |
'https://service.local/subpage'); |
|
138 |
``` |
|
139 |
|
|
140 |
### HTTP POST issues |
|
141 |
|
|
142 |
The standard method of passing "ticket" from CAS server to application |
|
143 |
is by HTTP GET method. To avoid having additional "ticket" parameter |
|
144 |
in the URL on single-page apps, which can expire and cause uphpCAS |
|
145 |
to throw exception, this library uses POST method by default. |
|
146 |
|
|
147 |
You can change the method back to HTTP GET with setMethod(): |
|
148 |
|
|
149 |
```php |
|
150 |
$cas = new uphpCAS('https://cas.server.local/cas'); |
|
151 |
$cas->setMethod('GET'); |
|
152 |
``` |
|
153 |
|
|
154 |
### CAS over HTTPS |
|
155 |
|
|
156 |
This library enforces CAS certificate validation. The hostname |
|
157 |
of the CAS server must match the one in provided SSL certificate. |
|
158 |
Also the certificate must be signed by CA included in CA store |
|
159 |
(or self-signed - then the certificate itself must be included). |
|
160 |
By default it looks for CA store at: |
|
161 |
|
|
162 |
- /etc/ssl/certs/ca-certificates.crt |
|
163 |
- /etc/ssl/certs/ca-bundle.crt |
|
164 |
- /etc/pki/tls/certs/ca-bundle.crt |
|
165 |
|
|
166 |
You can change path to CA store file using setCaFile() method: |
|
167 |
|
|
168 |
```php |
|
169 |
$cas = new uphpCAS('https://cas.server.local/cas'); |
|
170 |
$cas->setCaFile('./localStore.pem'); |
|
171 |
``` |