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