| commit | author | age | ||
| 64d82d | 1 | <?php |
| JK | 2 | // Thrown when internal error occurs |
| 3 | class JasigException extends Exception {} | |
| 2f13b1 | 4 | // Thrown when CAS server returns authentication error |
| 64d82d | 5 | class JasigAuthException extends JasigException {} |
| JK | 6 | |
| 7 | class JasigUser { | |
| 8 | public $user; | |
| 9 | public $attributes = array(); | |
| 10 | } | |
| 11 | ||
| 12 | class uphpCAS { | |
| 13 | const VERSION = '1.0'; | |
| 14 | protected $serverUrl = ''; | |
| 15 | protected $serviceUrl; | |
| 710793 | 16 | protected $sessionName = 'uphpCAS-user'; |
| 64d82d | 17 | |
| 710793 | 18 | function __construct($serverUrl = NULL, $serviceUrl = NULL, $sessionName = NULL) { |
| 64d82d | 19 | if($serverUrl != NULL) { |
| JK | 20 | $this->serverUrl = rtrim($serverUrl, '/'); |
| 21 | } | |
| 22 | ||
| 23 | if($serviceUrl != NULL) { | |
| 24 | $this->serviceUrl = $serviceUrl; | |
| 25 | } else { | |
| 8891c7 | 26 | $this->serviceUrl = $this->getCurrentUrl(); |
| 64d82d | 27 | } |
| 710793 | 28 | |
| JK | 29 | if($sessionName) { |
| 30 | $this->sessionName = $sessionName; | |
| 31 | } | |
| 64d82d | 32 | } |
| JK | 33 | |
| 8891c7 | 34 | public function getCurrentUrl() { |
| JK | 35 | $url = 'http://'; |
| 36 | $port = 0; | |
| 37 | if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') { | |
| 38 | $url = 'https://'; | |
| 39 | if(isset($_SERVER['SERVER_PORT']) | |
| 40 | && $_SERVER['SERVER_PORT'] != '443') { | |
| 41 | $port = $_SERVER['SERVER_PORT']; | |
| 42 | } | |
| 43 | } elseif(isset($_SERVER['SERVER_PORT']) | |
| 44 | && $_SERVER['SERVER_PORT'] != '80') { | |
| 45 | $port = $_SERVER['SERVER_PORT']; | |
| 46 | } | |
| 47 | ||
| 48 | $url .= $_SERVER['SERVER_NAME']; | |
| 49 | ||
| 50 | if($port != 0) { | |
| 51 | $url .= ':'.$port; | |
| 52 | } | |
| 53 | $url .= $_SERVER['REQUEST_URI']; | |
| 2b2985 | 54 | |
| JK | 55 | return $url; |
| 8891c7 | 56 | } |
| JK | 57 | |
| deadb1 | 58 | public function getServerUrl() { |
| bae7f7 | 59 | return $this->serverUrl; |
| JK | 60 | } |
| 64d82d | 61 | public function setServerUrl($serverUrl) { |
| JK | 62 | $this->serverUrl = $serverUrl; |
| 63 | } | |
| 64 | ||
| bae7f7 | 65 | public function getServiceUrl() { |
| JK | 66 | return $this->serviceUrl; |
| 67 | } | |
| 64d82d | 68 | public function setServiceUrl($serviceUrl) { |
| JK | 69 | $this->serviceUrl = $serviceUrl; |
| 70 | } | |
| 71 | ||
| 165b17 | 72 | public function getSessionName() { |
| 710793 | 73 | return $this->sessionName; |
| JK | 74 | } |
| 75 | public function setSessionName($sessionName) { | |
| 76 | $this->sessionName = $sessionName; | |
| 77 | } | |
| 78 | ||
| 64d82d | 79 | public function loginUrl() { |
| 2092d3 | 80 | return $this->serverUrl.'/login?method=POST&service='.urlencode($this->serviceUrl); |
| 64d82d | 81 | } |
| JK | 82 | |
| f124d4 | 83 | public function logoutUrl($returnUrl = NULL) { |
| JK | 84 | return $this->serverUrl.'/logout'.($returnUrl ? '?service='.urlencode($returnUrl) : ''); |
| 64d82d | 85 | } |
| JK | 86 | |
| cc5e29 | 87 | public function logout($returnUrl = NULL) { |
| 64d82d | 88 | session_start(); |
| cc5e29 | 89 | if($this->isAuthenticated()) { |
| 710793 | 90 | unset($_SESSION[$this->sessionName]); |
| cc5e29 | 91 | header('Location: '.$this->logoutUrl($returnUrl)); |
| JK | 92 | die(); |
| 93 | } elseif($returnUrl) { | |
| 94 | header('Location: '.$returnUrl); | |
| 95 | die(); | |
| 64d82d | 96 | } |
| JK | 97 | } |
| 98 | ||
| fc49b8 | 99 | public function isAuthenticated() { |
| 710793 | 100 | return isset($_SESSION[$this->sessionName]); |
| fc49b8 | 101 | } |
| JK | 102 | |
| 64d82d | 103 | public function authenticate() { |
| JK | 104 | session_start(); |
| fc49b8 | 105 | if($this->isAuthenticated()) { |
| 710793 | 106 | return $_SESSION[$this->sessionName]; |
| 2092d3 | 107 | } elseif(isset($_REQUEST['ticket'])) { |
| JK | 108 | $user = $this->verifyTicket($_REQUEST['ticket']); |
| 710793 | 109 | $_SESSION[$this->sessionName] = $user; |
| 64d82d | 110 | return $user; |
| JK | 111 | } else { |
| 112 | header('Location: '.$this->loginUrl()); | |
| 113 | die(); | |
| 114 | } | |
| 115 | } | |
| 116 | ||
| 501c90 | 117 | protected function findCaFile() { |
| JK | 118 | $cafiles = array( |
| 119 | '/etc/ssl/certs/ca-certificates.crt', | |
| 120 | '/etc/ssl/certs/ca-bundle.crt', | |
| 121 | '/etc/pki/tls/certs/ca-bundle.crt', | |
| 122 | ); | |
| 123 | ||
| 124 | $cafile = NULL; | |
| 125 | foreach($cafiles as $file) { | |
| 126 | if(is_file($file)) { | |
| 127 | $cafile = $file; | |
| 128 | break; | |
| 129 | } | |
| 130 | } | |
| 131 | ||
| 132 | return $cafile; | |
| 133 | } | |
| 134 | ||
| fa3e92 | 135 | protected function createStreamContext($hostname) { |
| JK | 136 | $context = stream_context_create(array( |
| 64d82d | 137 | 'http' => array( |
| JK | 138 | 'method' => 'GET', |
| 139 | 'user_agent' => 'uphpCAS/'.self::VERSION, | |
| 140 | 'max_redirects' => 3, | |
| 141 | ), | |
| 142 | 'ssl' => array( | |
| 143 | 'verify_peer' => TRUE, | |
| 90ae5b | 144 | 'verify_peer_name' => TRUE, |
| 64d82d | 145 | 'verify_depth' => 5, |
| 90ae5b | 146 | 'allow_self_signed' => FALSE, |
| JK | 147 | 'disable_compression' => TRUE, |
| 64d82d | 148 | ), |
| fa3e92 | 149 | )); |
| 64d82d | 150 | |
| d35cf4 | 151 | if(version_compare(PHP_VERSION, '5.6', '<')) { |
| fa3e92 | 152 | stream_context_set_option($context, array( |
| JK | 153 | 'ssl' => array( |
| 154 | 'cafile' => $this->findCaFile(), | |
| 155 | 'ciphers' => 'ECDH:DH:AES:CAMELLIA:!SSLv2:!aNULL:!eNULL' | |
| 156 | .':!EXPORT:!DES:!3DES:!MD5:!RC4:!ADH:!PSK:!SRP', | |
| 157 | 'CN_match' => $hostname, | |
| 158 | ), | |
| 159 | )); | |
| d35cf4 | 160 | } |
| fa3e92 | 161 | |
| JK | 162 | return $context; |
| 163 | } | |
| 164 | ||
| 165 | public function verifyTicket($ticket) { | |
| 166 | $url = parse_url($this->serverUrl); | |
| 167 | $context = $this->createStreamContext($url['host']); | |
| d35cf4 | 168 | |
| 90ae5b | 169 | $data = file_get_contents($this->serverUrl |
| JK | 170 | .'/serviceValidate?service='.urlencode($this->serviceUrl) |
| fa3e92 | 171 | .'&ticket='.urlencode($ticket), FALSE, $context); |
| 64d82d | 172 | if($data === FALSE) { |
| JK | 173 | throw new JasigException('Authentication error: CAS server is unavailable'); |
| 174 | } | |
| 175 | ||
| 176 | $xmlEntityLoader = libxml_disable_entity_loader(TRUE); | |
| 177 | $xmlInternalErrors = libxml_use_internal_errors(TRUE); | |
| 178 | try { | |
| 179 | $xml = new DOMDocument(); | |
| 180 | $xml->loadXML($data); | |
| 181 | ||
| 182 | foreach(libxml_get_errors() as $error) { | |
| 90ae5b | 183 | $e = new ErrorException($error->message, $error->code, 1, |
| JK | 184 | $error->file, $error->line); |
| 64d82d | 185 | switch ($error->level) { |
| JK | 186 | case LIBXML_ERR_ERROR: |
| 187 | case LIBXML_ERR_FATAL: | |
| 90ae5b | 188 | throw new Exception('Fatal error during XML parsing', |
| JK | 189 | 0, $e); |
| 64d82d | 190 | break; |
| JK | 191 | } |
| 192 | } | |
| 2f13b1 | 193 | } catch(Exception $e) { |
| 90ae5b | 194 | throw new JasigException('Authentication error: CAS server' |
| JK | 195 | .' response invalid - parse error', 0, $e); |
| 64d82d | 196 | } finally { |
| JK | 197 | libxml_clear_errors(); |
| 198 | libxml_disable_entity_loader($xmlEntityLoader); | |
| 199 | libxml_use_internal_errors($xmlInternalErrors); | |
| 200 | } | |
| 201 | ||
| 202 | $failure = $xml->getElementsByTagName('authenticationFailure'); | |
| 203 | $success = $xml->getElementsByTagName('authenticationSuccess'); | |
| 204 | ||
| 205 | if($failure->length > 0) { | |
| 206 | $failure = $failure->item(0); | |
| 207 | if(!($failure instanceof DOMElement)) { | |
| 90ae5b | 208 | throw new JasigException('Authentication error: CAS server' |
| JK | 209 | .' response invalid - authenticationFailure'); |
| 64d82d | 210 | } |
| 90ae5b | 211 | throw new JasigAuthException('Authentication error: ' |
| JK | 212 | .$failure->textContent); |
| 64d82d | 213 | } elseif($success->length > 0) { |
| JK | 214 | $success = $success->item(0); |
| 215 | if(!($success instanceof DOMElement)) { | |
| 90ae5b | 216 | throw new JasigException('Authentication error: CAS server' |
| JK | 217 | .' response invalid - authenticationSuccess'); |
| 64d82d | 218 | } |
| JK | 219 | |
| 220 | $user = $success->getElementsByTagName('user'); | |
| 221 | if($user->length == 0) { | |
| 90ae5b | 222 | throw new JasigException('Authentication error: CAS server' |
| JK | 223 | .' response invalid - user'); |
| 64d82d | 224 | } |
| JK | 225 | |
| 226 | $user = trim($user->item(0)->textContent); | |
| 2f13b1 | 227 | if(strlen($user) < 1) { |
| 90ae5b | 228 | throw new JasigException('Authentication error: CAS server' |
| JK | 229 | .' response invalid - user value'); |
| 64d82d | 230 | } |
| JK | 231 | |
| 232 | $jusr = new JasigUser(); | |
| 233 | $jusr->user = $user; | |
| 234 | ||
| 235 | $attrs = $success->getElementsByTagName('attributes'); | |
| 236 | if($attrs->length > 0) { | |
| 237 | $attrs = $attrs->item(0); | |
| 238 | foreach($attrs->childNodes as $node) { | |
| 239 | $jusr->attributes[$node->localName] = $node->textContent; | |
| 240 | } | |
| 241 | } | |
| 242 | ||
| 243 | return $jusr; | |
| 2f13b1 | 244 | } else { |
| 90ae5b | 245 | throw new JasigException('Authentication error: CAS server' |
| JK | 246 | .' response invalid - required tag not found'); |
| 64d82d | 247 | } |
| JK | 248 | } |
| 249 | } | |
