| 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($returnUrl) : ''); |
| 64d82d | 123 | } |
| JK | 124 | |
| cc5e29 | 125 | public function logout($returnUrl = NULL) { |
| 041819 | 126 | @session_start(); |
| cc5e29 | 127 | if($this->isAuthenticated()) { |
| 710793 | 128 | unset($_SESSION[$this->sessionName]); |
| cc5e29 | 129 | header('Location: '.$this->logoutUrl($returnUrl)); |
| JK | 130 | die(); |
| 131 | } elseif($returnUrl) { | |
| 132 | header('Location: '.$returnUrl); | |
| 133 | die(); | |
| 64d82d | 134 | } |
| JK | 135 | } |
| 136 | ||
| fc49b8 | 137 | public function isAuthenticated() { |
| 710793 | 138 | return isset($_SESSION[$this->sessionName]); |
| fc49b8 | 139 | } |
| JK | 140 | |
| 64d82d | 141 | public function authenticate() { |
| 041819 | 142 | @session_start(); |
| fc49b8 | 143 | if($this->isAuthenticated()) { |
| 710793 | 144 | return $_SESSION[$this->sessionName]; |
| 2092d3 | 145 | } elseif(isset($_REQUEST['ticket'])) { |
| JK | 146 | $user = $this->verifyTicket($_REQUEST['ticket']); |
| 710793 | 147 | $_SESSION[$this->sessionName] = $user; |
| 64d82d | 148 | return $user; |
| JK | 149 | } else { |
| 150 | header('Location: '.$this->loginUrl()); | |
| 151 | die(); | |
| 152 | } | |
| 153 | } | |
| 154 | ||
| 501c90 | 155 | protected function findCaFile() { |
| JK | 156 | $cafiles = array( |
| 157 | '/etc/ssl/certs/ca-certificates.crt', | |
| 158 | '/etc/ssl/certs/ca-bundle.crt', | |
| 159 | '/etc/pki/tls/certs/ca-bundle.crt', | |
| 160 | ); | |
| 161 | ||
| 162 | $cafile = NULL; | |
| 163 | foreach($cafiles as $file) { | |
| 164 | if(is_file($file)) { | |
| 165 | $cafile = $file; | |
| 166 | break; | |
| 167 | } | |
| 168 | } | |
| 169 | ||
| 170 | return $cafile; | |
| 171 | } | |
| 172 | ||
| fa3e92 | 173 | protected function createStreamContext($hostname) { |
| 8e8f55 | 174 | $context = array( |
| 64d82d | 175 | 'http' => array( |
| JK | 176 | 'method' => 'GET', |
| 177 | 'user_agent' => 'uphpCAS/'.self::VERSION, | |
| 178 | 'max_redirects' => 3, | |
| 179 | ), | |
| 180 | 'ssl' => array( | |
| 181 | 'verify_peer' => TRUE, | |
| 90ae5b | 182 | 'verify_peer_name' => TRUE, |
| 64d82d | 183 | 'verify_depth' => 5, |
| 90ae5b | 184 | 'allow_self_signed' => FALSE, |
| JK | 185 | 'disable_compression' => TRUE, |
| 64d82d | 186 | ), |
| 8e8f55 | 187 | ); |
| 64d82d | 188 | |
| 8e8f55 | 189 | if($this->caFile) { |
| JK | 190 | $context['ssl']['cafile'] = $this->caFile; |
| d35cf4 | 191 | } |
| fa3e92 | 192 | |
| 8e8f55 | 193 | if(version_compare(PHP_VERSION, '5.6', '<')) { |
| JK | 194 | $context['ssl']['ciphers'] = 'ECDH:DH:AES:CAMELLIA:!SSLv2:!aNULL' |
| 195 | .':!eNULL:!EXPORT:!DES:!3DES:!MD5:!RC4:!ADH:!PSK:!SRP'; | |
| 196 | $context['ssl']['CN_match'] = $hostname; | |
| 197 | } | |
| 198 | ||
| 199 | return stream_context_create($context); | |
| fa3e92 | 200 | } |
| JK | 201 | |
| 202 | public function verifyTicket($ticket) { | |
| 203 | $url = parse_url($this->serverUrl); | |
| 204 | $context = $this->createStreamContext($url['host']); | |
| d35cf4 | 205 | |
| 90ae5b | 206 | $data = file_get_contents($this->serverUrl |
| JK | 207 | .'/serviceValidate?service='.urlencode($this->serviceUrl) |
| fa3e92 | 208 | .'&ticket='.urlencode($ticket), FALSE, $context); |
| 64d82d | 209 | if($data === FALSE) { |
| JK | 210 | throw new JasigException('Authentication error: CAS server is unavailable'); |
| 211 | } | |
| 212 | ||
| 213 | $xmlEntityLoader = libxml_disable_entity_loader(TRUE); | |
| 214 | $xmlInternalErrors = libxml_use_internal_errors(TRUE); | |
| 215 | try { | |
| 216 | $xml = new DOMDocument(); | |
| 217 | $xml->loadXML($data); | |
| 218 | ||
| 219 | foreach(libxml_get_errors() as $error) { | |
| 90ae5b | 220 | $e = new ErrorException($error->message, $error->code, 1, |
| JK | 221 | $error->file, $error->line); |
| 64d82d | 222 | switch ($error->level) { |
| JK | 223 | case LIBXML_ERR_ERROR: |
| 224 | case LIBXML_ERR_FATAL: | |
| 90ae5b | 225 | throw new Exception('Fatal error during XML parsing', |
| JK | 226 | 0, $e); |
| 64d82d | 227 | break; |
| JK | 228 | } |
| 229 | } | |
| 2f13b1 | 230 | } catch(Exception $e) { |
| 90ae5b | 231 | throw new JasigException('Authentication error: CAS server' |
| JK | 232 | .' response invalid - parse error', 0, $e); |
| 64d82d | 233 | } finally { |
| JK | 234 | libxml_clear_errors(); |
| 235 | libxml_disable_entity_loader($xmlEntityLoader); | |
| 236 | libxml_use_internal_errors($xmlInternalErrors); | |
| 237 | } | |
| 238 | ||
| 239 | $failure = $xml->getElementsByTagName('authenticationFailure'); | |
| 240 | $success = $xml->getElementsByTagName('authenticationSuccess'); | |
| 241 | ||
| 242 | if($failure->length > 0) { | |
| 243 | $failure = $failure->item(0); | |
| 244 | if(!($failure instanceof DOMElement)) { | |
| 90ae5b | 245 | throw new JasigException('Authentication error: CAS server' |
| JK | 246 | .' response invalid - authenticationFailure'); |
| 64d82d | 247 | } |
| 90ae5b | 248 | throw new JasigAuthException('Authentication error: ' |
| JK | 249 | .$failure->textContent); |
| 64d82d | 250 | } elseif($success->length > 0) { |
| JK | 251 | $success = $success->item(0); |
| 252 | if(!($success instanceof DOMElement)) { | |
| 90ae5b | 253 | throw new JasigException('Authentication error: CAS server' |
| JK | 254 | .' response invalid - authenticationSuccess'); |
| 64d82d | 255 | } |
| JK | 256 | |
| 257 | $user = $success->getElementsByTagName('user'); | |
| 258 | if($user->length == 0) { | |
| 90ae5b | 259 | throw new JasigException('Authentication error: CAS server' |
| JK | 260 | .' response invalid - user'); |
| 64d82d | 261 | } |
| JK | 262 | |
| 263 | $user = trim($user->item(0)->textContent); | |
| 2f13b1 | 264 | if(strlen($user) < 1) { |
| 90ae5b | 265 | throw new JasigException('Authentication error: CAS server' |
| JK | 266 | .' response invalid - user value'); |
| 64d82d | 267 | } |
| JK | 268 | |
| 269 | $jusr = new JasigUser(); | |
| 270 | $jusr->user = $user; | |
| 271 | ||
| 272 | $attrs = $success->getElementsByTagName('attributes'); | |
| 273 | if($attrs->length > 0) { | |
| 274 | $attrs = $attrs->item(0); | |
| 275 | foreach($attrs->childNodes as $node) { | |
| 276 | $jusr->attributes[$node->localName] = $node->textContent; | |
| 277 | } | |
| 278 | } | |
| 279 | ||
| 280 | return $jusr; | |
| 2f13b1 | 281 | } else { |
| 90ae5b | 282 | throw new JasigException('Authentication error: CAS server' |
| JK | 283 | .' response invalid - required tag not found'); |
| 64d82d | 284 | } |
| JK | 285 | } |
| 286 | } | |
