ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
MemcachedStore.php
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1<?php
2
21require_once 'Auth/OpenID/Interface.php';
22
37
44 function Auth_OpenID_MemcachedStore($connection, $compress = false)
45 {
46 $this->connection = $connection;
47 $this->compress = $compress ? MEMCACHE_COMPRESSED : 0;
48 }
49
55 function storeAssociation($server_url, $association)
56 {
57 // create memcached keys for association itself
58 // and list of associations for this server
59 $associationKey = $this->associationKey($server_url,
60 $association->handle);
61 $serverKey = $this->associationServerKey($server_url);
62
63 // get list of associations
64 $serverAssociations = $this->connection->get($serverKey);
65
66 // if no such list, initialize it with empty array
67 if (!$serverAssociations) {
68 $serverAssociations = array();
69 }
70 // and store given association key in it
71 $serverAssociations[$association->issued] = $associationKey;
72
73 // save associations' keys list
74 $this->connection->set(
75 $serverKey,
76 $serverAssociations,
77 $this->compress
78 );
79 // save association itself
80 $this->connection->set(
81 $associationKey,
82 $association,
83 $this->compress,
84 $association->issued + $association->lifetime);
85 }
86
91 function getAssociation($server_url, $handle = null)
92 {
93 // simple case: handle given
94 if ($handle !== null) {
95 // get association, return null if failed
96 $association = $this->connection->get(
97 $this->associationKey($server_url, $handle));
98 return $association ? $association : null;
99 }
100
101 // no handle given, working with list
102 // create key for list of associations
103 $serverKey = $this->associationServerKey($server_url);
104
105 // get list of associations
106 $serverAssociations = $this->connection->get($serverKey);
107 // return null if failed or got empty list
108 if (!$serverAssociations) {
109 return null;
110 }
111
112 // get key of most recently issued association
113 $keys = array_keys($serverAssociations);
114 sort($keys);
115 $lastKey = $serverAssociations[array_pop($keys)];
116
117 // get association, return null if failed
118 $association = $this->connection->get($lastKey);
119 return $association ? $association : null;
120 }
121
125 function removeAssociation($server_url, $handle)
126 {
127 // create memcached keys for association itself
128 // and list of associations for this server
129 $serverKey = $this->associationServerKey($server_url);
130 $associationKey = $this->associationKey($server_url,
131 $handle);
132
133 // get list of associations
134 $serverAssociations = $this->connection->get($serverKey);
135 // return null if failed or got empty list
136 if (!$serverAssociations) {
137 return false;
138 }
139
140 // ensure that given association key exists in list
141 $serverAssociations = array_flip($serverAssociations);
142 if (!array_key_exists($associationKey, $serverAssociations)) {
143 return false;
144 }
145
146 // remove given association key from list
147 unset($serverAssociations[$associationKey]);
148 $serverAssociations = array_flip($serverAssociations);
149
150 // save updated list
151 $this->connection->set(
152 $serverKey,
153 $serverAssociations,
154 $this->compress
155 );
156
157 // delete association
158 return $this->connection->delete($associationKey);
159 }
160
165 function useNonce($server_url, $timestamp, $salt)
166 {
167 global $Auth_OpenID_SKEW;
168
169 // save one request to memcache when nonce obviously expired
170 if (abs($timestamp - time()) > $Auth_OpenID_SKEW) {
171 return false;
172 }
173
174 // returns false when nonce already exists
175 // otherwise adds nonce
176 return $this->connection->add(
177 'openid_nonce_' . sha1($server_url) . '_' . sha1($salt),
178 1, // any value here
179 $this->compress,
181 }
182
186 function associationKey($server_url, $handle = null)
187 {
188 return 'openid_association_' . sha1($server_url) . '_' . sha1($handle);
189 }
190
194 function associationServerKey($server_url)
195 {
196 return 'openid_association_server_' . sha1($server_url);
197 }
198
203 {
204 return false;
205 }
206}
207
global $Auth_OpenID_SKEW
Definition: Nonce.php:23
foreach($mandatory_scripts as $file) $timestamp
Definition: buildRTE.php:81
useNonce($server_url, $timestamp, $salt)
Create nonce for server and salt, expiring after $Auth_OpenID_SKEW seconds.
associationKey($server_url, $handle=null)
Memcache key is prefixed with 'openid_association_' string.
removeAssociation($server_url, $handle)
Immediately delete association from memcache.
getAssociation($server_url, $handle=null)
Read association from memcached.
Auth_OpenID_MemcachedStore($connection, $compress=false)
Initializes a new Auth_OpenID_MemcachedStore instance.
storeAssociation($server_url, $association)
Store association until its expiration time in memcached.
supportsCleanup()
Report that this storage doesn't support cleanup.
associationServerKey($server_url)
Memcache key is prefixed with 'openid_association_' string.