| 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'; |
| 8e8f55 | 17 | protected $method = 'POST'; |
| JK | 18 | protected $caFile = NULL; |
| 64d82d | 19 | |
| 710793 | 20 | function __construct($serverUrl = NULL, $serviceUrl = NULL, $sessionName = NULL) { |
| 64d82d | 21 | if($serverUrl != NULL) { |
| JK | 22 | $this->serverUrl = rtrim($serverUrl, '/'); |
| 23 | } | |
| 24 | ||
| 25 | if($serviceUrl != NULL) { | |
| 26 | $this->serviceUrl = $serviceUrl; | |
| 27 | } else { | |
| 8891c7 | 28 | $this->serviceUrl = $this->getCurrentUrl(); |
| 64d82d | 29 | } |
| 710793 | 30 | |
| JK | 31 | if($sessionName) { |
| 32 | $this->sessionName = $sessionName; | |
| 8e8f55 | 33 | } |
| JK | 34 | |
| 35 | if(version_compare(PHP_VERSION, '5.6', '<')) { | |
| 36 | $this->caFile = $this->findCaFile(); | |
| 710793 | 37 | } |
| 64d82d | 38 | } |
| JK | 39 | |
| 8891c7 | 40 | public function getCurrentUrl() { |
| JK | 41 | $url = 'http://'; |
| 42 | $port = 0; | |
| 43 | if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') { | |
| 44 | $url = 'https://'; | |
| 45 | if(isset($_SERVER['SERVER_PORT']) | |
| 46 | && $_SERVER['SERVER_PORT'] != '443') { | |
| 47 | $port = $_SERVER['SERVER_PORT']; | |
| 48 | } | |
| 49 | } elseif(isset($_SERVER['SERVER_PORT']) | |
| 50 | && $_SERVER['SERVER_PORT'] != '80') { | |
| 51 | $port = $_SERVER['SERVER_PORT']; | |
| 52 | } | |
| 53 | ||
| 54 | $url .= $_SERVER['SERVER_NAME']; | |
| 55 | ||
| 56 | if($port != 0) { | |
| 57 | $url .= ':'.$port; | |
| 58 | } | |
| 44b838 | 59 | |
| 8891c7 | 60 | $url .= $_SERVER['REQUEST_URI']; |
| 2b2985 | 61 | |
| 44b838 | 62 | if(isset($_GET['ticket'])) { |
| JK | 63 | $pos = max( |
| 64 | strrpos($url, '?ticket='), | |
| 65 | strrpos($url, '&ticket=') | |
| 66 | ); | |
| 67 | $url = substr($url, 0, $pos); | |
| 68 | } | |
| 69 | ||
| 2b2985 | 70 | return $url; |
| 8891c7 | 71 | } |
| JK | 72 | |
| deadb1 | 73 | public function getServerUrl() { |
| bae7f7 | 74 | return $this->serverUrl; |
| JK | 75 | } |
| 64d82d | 76 | public function setServerUrl($serverUrl) { |
| JK | 77 | $this->serverUrl = $serverUrl; |
| 78 | } | |
| 79 | ||
| bae7f7 | 80 | public function getServiceUrl() { |
| JK | 81 | return $this->serviceUrl; |
| 82 | } | |
| 64d82d | 83 | public function setServiceUrl($serviceUrl) { |
| JK | 84 | $this->serviceUrl = $serviceUrl; |
| 85 | } | |
| 86 | ||
| 165b17 | 87 | public function getSessionName() { |
| 710793 | 88 | return $this->sessionName; |
| JK | 89 | } |
| 90 | public function setSessionName($sessionName) { | |
| 91 | $this->sessionName = $sessionName; | |
| 92 | } | |
| 93 | ||
| 8e8f55 | 94 | public function getMethod() { |
| JK | 95 | return $this->method; |
| 96 | } | |
| 97 | public function setMethod($method) { | |
| 98 | if($method != 'GET' && $method != 'POST') { | |
| 99 | throw new DomainException('Unsupported CAS response' | |
| 100 | .' method: '.$method); | |
| 101 | } | |
| 102 | $this->method = $method; | |
| 103 | } | |
| 104 | ||
| 105 | public function getCaFile() { | |
| 106 | return $this->caFile; | |
| 107 | } | |
| 108 | public function setCaFile($caFile) { | |
| 109 | if(!is_file($caFile)) { | |
| 110 | throw new DomainException('Invalid CA file: '.$caFile); | |
| 111 | } | |
| 112 | $this->caFile = $caFile; | |
| 113 | } | |
| 114 | ||
| 64d82d | 115 | public function loginUrl() { |
| 8e8f55 | 116 | return $this->serverUrl.'/login?method='.$this->method |
| JK | 117 | .'&service='.urlencode($this->serviceUrl); |
| 64d82d | 118 | } |
| JK | 119 | |
| f124d4 | 120 | public function logoutUrl($returnUrl = NULL) { |
| 8e8f55 | 121 | return $this->serverUrl.'/logout' |
| JK | 122 | .($returnUrl ? '?service='.urlencode($returnUrl) : ''); |
| 64d82d | 123 | } |
| JK | 124 | |
| 467a55 | 125 | public function logoutLocal() { |
| 041819 | 126 | @session_start(); |
| 467a55 | 127 | unset($_SESSION[$this->sessionName]); |
| JK | 128 | } |
| 129 | ||
| 130 | public function logout($returnUrl = NULL) { | |
| 131 | $this->logoutLocal(); | |
| cc5e29 | 132 | if($this->isAuthenticated()) { |
| JK | 133 | header('Location: '.$this->logoutUrl($returnUrl)); |
| 134 | die(); | |
| 135 | } elseif($returnUrl) { | |
| 136 | header('Location: '.$returnUrl); | |
| 137 | die(); | |
| 64d82d | 138 | } |
| JK | 139 | } |
| 140 | ||
| fc49b8 | 141 | public function isAuthenticated() { |
| 710793 | 142 | return isset($_SESSION[$this->sessionName]); |
| fc49b8 | 143 | } |
| JK | 144 | |
| 64d82d | 145 | public function authenticate() { |
| 041819 | 146 | @session_start(); |
| fc49b8 | 147 | if($this->isAuthenticated()) { |
| 710793 | 148 | return $_SESSION[$this->sessionName]; |
| 2092d3 | 149 | } elseif(isset($_REQUEST['ticket'])) { |
| JK | 150 | $user = $this->verifyTicket($_REQUEST['ticket']); |
| 710793 | 151 | $_SESSION[$this->sessionName] = $user; |
| 64d82d | 152 | return $user; |
| JK | 153 | } else { |
| 154 | header('Location: '.$this->loginUrl()); | |
| 155 | die(); | |
| 156 | } | |
| 157 | } | |
| 158 | ||
| 501c90 | 159 | protected function findCaFile() { |
| JK | 160 | $cafiles = array( |
| 161 | '/etc/ssl/certs/ca-certificates.crt', | |
| 162 | '/etc/ssl/certs/ca-bundle.crt', | |
| 163 | '/etc/pki/tls/certs/ca-bundle.crt', | |
| 164 | ); | |
| 165 | ||
| 166 | $cafile = NULL; | |
| 167 | foreach($cafiles as $file) { | |
| 168 | if(is_file($file)) { | |
| 169 | $cafile = $file; | |
| 170 | break; | |
| 171 | } | |
| 172 | } | |
| 173 | ||
| 174 | return $cafile; | |
| 175 | } | |
| 176 | ||
| fa3e92 | 177 | protected function createStreamContext($hostname) { |
| 8e8f55 | 178 | $context = array( |
| 64d82d | 179 | 'http' => array( |
| JK | 180 | 'method' => 'GET', |
| 181 | 'user_agent' => 'uphpCAS/'.self::VERSION, | |
| 182 | 'max_redirects' => 3, | |
| 183 | ), | |
| 184 | 'ssl' => array( | |
| 185 | 'verify_peer' => TRUE, | |
| 90ae5b | 186 | 'verify_peer_name' => TRUE, |
| 64d82d | 187 | 'verify_depth' => 5, |
| 90ae5b | 188 | 'allow_self_signed' => FALSE, |
| JK | 189 | 'disable_compression' => TRUE, |
| 64d82d | 190 | ), |
| 8e8f55 | 191 | ); |
| 64d82d | 192 | |
| 8e8f55 | 193 | if($this->caFile) { |
| JK | 194 | $context['ssl']['cafile'] = $this->caFile; |
| d35cf4 | 195 | } |
| fa3e92 | 196 | |
| 8e8f55 | 197 | if(version_compare(PHP_VERSION, '5.6', '<')) { |
| JK | 198 | $context['ssl']['ciphers'] = 'ECDH:DH:AES:CAMELLIA:!SSLv2:!aNULL' |
| 199 | .':!eNULL:!EXPORT:!DES:!3DES:!MD5:!RC4:!ADH:!PSK:!SRP'; | |
| 200 | $context['ssl']['CN_match'] = $hostname; | |
| 201 | } | |
| 202 | ||
| 203 | return stream_context_create($context); | |
| fa3e92 | 204 | } |
| JK | 205 | |
| 206 | public function verifyTicket($ticket) { | |
| 207 | $url = parse_url($this->serverUrl); | |
| 208 | $context = $this->createStreamContext($url['host']); | |
| d35cf4 | 209 | |
| 90ae5b | 210 | $data = file_get_contents($this->serverUrl |
| JK | 211 | .'/serviceValidate?service='.urlencode($this->serviceUrl) |
| fa3e92 | 212 | .'&ticket='.urlencode($ticket), FALSE, $context); |
| 64d82d | 213 | if($data === FALSE) { |
| JK | 214 | throw new JasigException('Authentication error: CAS server is unavailable'); |
| 215 | } | |
| 216 | ||
| 217 | $xmlEntityLoader = libxml_disable_entity_loader(TRUE); | |
| 218 | $xmlInternalErrors = libxml_use_internal_errors(TRUE); | |
| 219 | try { | |
| 220 | $xml = new DOMDocument(); | |
| 221 | $xml->loadXML($data); | |
| 222 | ||
| 223 | foreach(libxml_get_errors() as $error) { | |
| 90ae5b | 224 | $e = new ErrorException($error->message, $error->code, 1, |
| JK | 225 | $error->file, $error->line); |
| 64d82d | 226 | switch ($error->level) { |
| JK | 227 | case LIBXML_ERR_ERROR: |
| 228 | case LIBXML_ERR_FATAL: | |
| 90ae5b | 229 | throw new Exception('Fatal error during XML parsing', |
| JK | 230 | 0, $e); |
| 64d82d | 231 | break; |
| JK | 232 | } |
| 233 | } | |
| 2f13b1 | 234 | } catch(Exception $e) { |
| 64d82d | 235 | libxml_clear_errors(); |
| JK | 236 | libxml_disable_entity_loader($xmlEntityLoader); |
| 237 | libxml_use_internal_errors($xmlInternalErrors); | |
| a66017 | 238 | throw new JasigException('Authentication error: CAS server' |
| JK | 239 | .' response invalid - parse error', 0, $e); |
| 64d82d | 240 | } |
| a66017 | 241 | libxml_clear_errors(); |
| JK | 242 | libxml_disable_entity_loader($xmlEntityLoader); |
| 243 | libxml_use_internal_errors($xmlInternalErrors); | |
| 64d82d | 244 | |
| JK | 245 | $failure = $xml->getElementsByTagName('authenticationFailure'); |
| 246 | $success = $xml->getElementsByTagName('authenticationSuccess'); | |
| 247 | ||
| 248 | if($failure->length > 0) { | |
| 249 | $failure = $failure->item(0); | |
| 250 | if(!($failure instanceof DOMElement)) { | |
| 90ae5b | 251 | throw new JasigException('Authentication error: CAS server' |
| JK | 252 | .' response invalid - authenticationFailure'); |
| 64d82d | 253 | } |
| 90ae5b | 254 | throw new JasigAuthException('Authentication error: ' |
| JK | 255 | .$failure->textContent); |
| 64d82d | 256 | } elseif($success->length > 0) { |
| JK | 257 | $success = $success->item(0); |
| 258 | if(!($success instanceof DOMElement)) { | |
| 90ae5b | 259 | throw new JasigException('Authentication error: CAS server' |
| JK | 260 | .' response invalid - authenticationSuccess'); |
| 64d82d | 261 | } |
| JK | 262 | |
| 263 | $user = $success->getElementsByTagName('user'); | |
| 264 | if($user->length == 0) { | |
| 90ae5b | 265 | throw new JasigException('Authentication error: CAS server' |
| JK | 266 | .' response invalid - user'); |
| 64d82d | 267 | } |
| JK | 268 | |
| 269 | $user = trim($user->item(0)->textContent); | |
| 2f13b1 | 270 | if(strlen($user) < 1) { |
| 90ae5b | 271 | throw new JasigException('Authentication error: CAS server' |
| JK | 272 | .' response invalid - user value'); |
| 64d82d | 273 | } |
| JK | 274 | |
| 275 | $jusr = new JasigUser(); | |
| 276 | $jusr->user = $user; | |
| 277 | ||
| 278 | $attrs = $success->getElementsByTagName('attributes'); | |
| 279 | if($attrs->length > 0) { | |
| 280 | $attrs = $attrs->item(0); | |
| 281 | foreach($attrs->childNodes as $node) { | |
| 282 | $jusr->attributes[$node->localName] = $node->textContent; | |
| 283 | } | |
| 284 | } | |
| 285 | ||
| 286 | return $jusr; | |
| 2f13b1 | 287 | } else { |
| 90ae5b | 288 | throw new JasigException('Authentication error: CAS server' |
| JK | 289 | .' response invalid - required tag not found'); |
| 64d82d | 290 | } |
| JK | 291 | } |
| 292 | } | |
