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
160
161
162
163
164
165
166
167
168
169
170
171
172
|
<?php
use SimpleSAML\Utils\HTTPAdapter;
/**
* Filter to ensure correct cardinality of attributes
*
* @author Guy Halse, http://orcid.org/0000-0002-9388-8592
* @package SimpleSAMLphp
*/
class sspmod_core_Auth_Process_Cardinality extends SimpleSAML_Auth_ProcessingFilter
{
/** @var array Associative array with the mappings of attribute names. */
private $cardinality = array();
/** @var array Entities that should be ignored */
private $ignoreEntities = array();
/** @var HTTP */
private $http;
/**
* Initialize this filter, parse configuration.
*
* @param array $config Configuration information about this filter.
* @param mixed $reserved For future use.
* @param HTTPAdapter $http HTTP utility service (handles redirects).
* @throws SimpleSAML_Error_Exception
*/
public function __construct($config, $reserved, HTTPAdapter $http = null)
{
parent::__construct($config, $reserved);
assert(is_array($config));
$this->http = $http ?: new HTTPAdapter();
foreach ($config as $attribute => $rules) {
if ($attribute === '%ignoreEntities') {
$this->ignoreEntities = $config['%ignoreEntities'];
continue;
}
if (!is_string($attribute)) {
throw new SimpleSAML_Error_Exception('Invalid attribute name: '.var_export($attribute, true));
}
$this->cardinality[$attribute] = array('warn' => false);
/* allow either positional or name-based parameters */
if (isset($rules[0])) {
$this->cardinality[$attribute]['min'] = $rules[0];
} elseif (isset($rules['min'])) {
$this->cardinality[$attribute]['min'] = $rules['min'];
}
if (isset($rules[1])) {
$this->cardinality[$attribute]['max'] = $rules[1];
} elseif (isset($rules['max'])) {
$this->cardinality[$attribute]['max'] = $rules['max'];
}
if (array_key_exists('warn', $rules)) {
$this->cardinality[$attribute]['warn'] = (bool) $rules['warn'];
}
/* sanity check the rules */
if (!array_key_exists('min', $this->cardinality[$attribute])) {
$this->cardinality[$attribute]['min'] = 0;
} elseif (!is_int($this->cardinality[$attribute]['min']) ||
$this->cardinality[$attribute]['min'] < 0
) {
throw new SimpleSAML_Error_Exception('Minimum cardinality must be a positive integer: '.
var_export($attribute, true));
}
if (array_key_exists('max', $this->cardinality[$attribute]) &&
!is_int($this->cardinality[$attribute]['max'])
) {
throw new SimpleSAML_Error_Exception('Maximum cardinality must be a positive integer: '.
var_export($attribute, true));
}
if (array_key_exists('min', $this->cardinality[$attribute]) &&
array_key_exists('max', $this->cardinality[$attribute]) &&
$this->cardinality[$attribute]['min'] > $this->cardinality[$attribute]['max']
) {
throw new SimpleSAML_Error_Exception('Minimum cardinality must be less than maximium: '.
var_export($attribute, true));
}
/* generate a display expression */
$this->cardinality[$attribute]['_expr'] = sprintf('%d ≤ n', $this->cardinality[$attribute]['min']);
if (array_key_exists('max', $this->cardinality[$attribute])) {
$this->cardinality[$attribute]['_expr'] .= sprintf(' ≤ %d', $this->cardinality[$attribute]['max']);
}
}
}
/**
* Process this filter
*
* @param array &$request The current request
*/
public function process(&$request)
{
assert(is_array($request));
assert(array_key_exists("Attributes", $request));
$entityid = false;
if (array_key_exists('Source', $request) && array_key_exists('entityid', $request['Source'])) {
$entityid = $request['Source']['entityid'];
}
if (in_array($entityid, $this->ignoreEntities, true)) {
SimpleSAML\Logger::debug('Cardinality: Ignoring assertions from '.$entityid);
return;
}
foreach ($request['Attributes'] as $k => $v) {
if (!array_key_exists($k, $this->cardinality)) {
continue;
}
if (!is_array($v)) {
$v = array($v);
}
/* minimum cardinality */
if (count($v) < $this->cardinality[$k]['min']) {
if ($this->cardinality[$k]['warn']) {
SimpleSAML\Logger::warning(sprintf(
'Cardinality: attribute %s from %s does not meet minimum cardinality of %d (%d)',
$k, $entityid, $this->cardinality[$k]['min'], count($v)
));
} else {
$request['core:cardinality:errorAttributes'][$k] = array(count($v), $this->cardinality[$k]['_expr']);
}
continue;
}
/* maximum cardinality */
if (array_key_exists('max', $this->cardinality[$k]) && count($v) > $this->cardinality[$k]['max']) {
if ($this->cardinality[$k]['warn']) {
SimpleSAML\Logger::warning(sprintf(
'Cardinality: attribute %s from %s does not meet maximum cardinality of %d (%d)',
$k, $entityid, $this->cardinality[$k]['max'], count($v)
));
} else {
$request['core:cardinality:errorAttributes'][$k] = array(count($v), $this->cardinality[$k]['_expr']);
}
continue;
}
}
/* check for missing attributes with a minimum cardinality */
foreach ($this->cardinality as $k => $v) {
if (!$this->cardinality[$k]['min'] || array_key_exists($k, $request['Attributes'])) {
continue;
}
if ($this->cardinality[$k]['warn']) {
SimpleSAML\Logger::warning(sprintf(
'Cardinality: attribute %s from %s is missing',
$k, $entityid
));
} else {
$request['core:cardinality:errorAttributes'][$k] = array(0, $this->cardinality[$k]['_expr']);
}
}
/* abort if we found a problematic attribute */
if (array_key_exists('core:cardinality:errorAttributes', $request)) {
$id = SimpleSAML_Auth_State::saveState($request, 'core:cardinality');
$url = SimpleSAML\Module::getModuleURL('core/cardinality_error.php');
$this->http->redirectTrustedURL($url, array('StateId' => $id));
return;
}
}
}
|
