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