InternalProxied

Functions
	CAS_Client::validateCAS20 (&$validate_url, &$text_response, &$tree_response, $renew=false)
	This method is used to validate a cas 2.0 ST or PT; halt on failure Used for all CAS 2.0 validations. More...
	CAS_Client::_readExtraAttributesCas20 ($success_elements)
	This method will parse the DOM and pull out the attributes from the XML payload and put them into an array, then put the array into the session. More...
	CAS_Client::_addAttributeToArray (array &$attributeArray, $name, $value)
	Add an attribute value to an array of attributes. More...

Detailed Description

Function Documentation

_addAttributeToArray()

CAS_Client::_addAttributeToArray ( array &  $attributeArray,   $name,   $value  )

private

Add an attribute value to an array of attributes.

Parameters

array	&$attributeArray	reference to array
string	$name	name of attribute
string	$value	value of attribute

Returns

void

Definition at line 3584 of file Client.php.

    {
        // If multiple attributes exist, add as an array value
        if (isset($attributeArray[$name])) {
            // Initialize the array with the existing value
            if (!is_array($attributeArray[$name])) {
                $existingValue = $attributeArray[$name];
                $attributeArray[$name] = array($existingValue);
            }
 
            $attributeArray[$name][] = trim($value);
        } else {
            $attributeArray[$name] = trim($value);
        }
    }

References $name.

_readExtraAttributesCas20()

CAS_Client::_readExtraAttributesCas20 (   $success_elements )

private

This method will parse the DOM and pull out the attributes from the XML payload and put them into an array, then put the array into the session.

Parameters

string

$success_elements

payload of the response

Returns

bool true when successfull, halt otherwise by calling CAS_Client::_authError().

Definition at line 3431 of file Client.php.

    {
        phpCAS::traceBegin();
 
        $extra_attributes = array();
 
        // "Jasig Style" Attributes:
        //
        //      <cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
        //              <cas:authenticationSuccess>
        //                      <cas:user>jsmith</cas:user>
        //                      <cas:attributes>
        //                              <cas:attraStyle>RubyCAS</cas:attraStyle>
        //                              <cas:surname>Smith</cas:surname>
        //                              <cas:givenName>John</cas:givenName>
        //                              <cas:memberOf>CN=Staff,OU=Groups,DC=example,DC=edu</cas:memberOf>
        //                              <cas:memberOf>CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu</cas:memberOf>
        //                      </cas:attributes>
        //                      <cas:proxyGrantingTicket>PGTIOU-84678-8a9d2sfa23casd</cas:proxyGrantingTicket>
        //              </cas:authenticationSuccess>
        //      </cas:serviceResponse>
        //
        if ($this->_casAttributeParserCallbackFunction !== null
            && is_callable($this->_casAttributeParserCallbackFunction)
        ) {
            array_unshift($this->_casAttributeParserCallbackArgs, $success_elements->item(0));
            phpCas :: trace("Calling attritubeParser callback");
            $extra_attributes = call_user_func_array(
                $this->_casAttributeParserCallbackFunction,
                $this->_casAttributeParserCallbackArgs
            );
        } elseif ($success_elements->item(0)->getElementsByTagName("attributes")->length != 0) {
            $attr_nodes = $success_elements->item(0)
                ->getElementsByTagName("attributes");
            phpCas :: trace("Found nested jasig style attributes");
            if ($attr_nodes->item(0)->hasChildNodes()) {
                // Nested Attributes
                foreach ($attr_nodes->item(0)->childNodes as $attr_child) {
                    phpCas :: trace(
                        "Attribute [" . $attr_child->localName . "] = "
                        . $attr_child->nodeValue
                    );
                    $this->_addAttributeToArray(
                        $extra_attributes,
                        $attr_child->localName,
                        $attr_child->nodeValue
                    );
                }
            }
        } else {
            // "RubyCAS Style" attributes
            //
            //  <cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
            //          <cas:authenticationSuccess>
            //                  <cas:user>jsmith</cas:user>
            //
            //                  <cas:attraStyle>RubyCAS</cas:attraStyle>
            //                  <cas:surname>Smith</cas:surname>
            //                  <cas:givenName>John</cas:givenName>
            //                  <cas:memberOf>CN=Staff,OU=Groups,DC=example,DC=edu</cas:memberOf>
            //                  <cas:memberOf>CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu</cas:memberOf>
            //
            //                  <cas:proxyGrantingTicket>PGTIOU-84678-8a9d2sfa23casd</cas:proxyGrantingTicket>
            //          </cas:authenticationSuccess>
            //  </cas:serviceResponse>
            //
            phpCas :: trace("Testing for rubycas style attributes");
            $childnodes = $success_elements->item(0)->childNodes;
            foreach ($childnodes as $attr_node) {
                switch ($attr_node->localName) {
                case 'user':
                case 'proxies':
                case 'proxyGrantingTicket':
                    continue;
                default:
                    if (strlen(trim($attr_node->nodeValue))) {
                        phpCas :: trace(
                            "Attribute [" . $attr_node->localName . "] = " . $attr_node->nodeValue
                        );
                        $this->_addAttributeToArray(
                            $extra_attributes,
                            $attr_node->localName,
                            $attr_node->nodeValue
                        );
                    }
                }
            }
        }
 
        // "Name-Value" attributes.
        //
        // Attribute format from these mailing list thread:
        // http://jasig.275507.n4.nabble.com/CAS-attributes-and-how-they-appear-in-the-CAS-response-td264272.html
        // Note: This is a less widely used format, but in use by at least two institutions.
        //
        //      <cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
        //              <cas:authenticationSuccess>
        //                      <cas:user>jsmith</cas:user>
        //
        //                      <cas:attribute name='attraStyle' value='Name-Value' />
        //                      <cas:attribute name='surname' value='Smith' />
        //                      <cas:attribute name='givenName' value='John' />
        //                      <cas:attribute name='memberOf' value='CN=Staff,OU=Groups,DC=example,DC=edu' />
        //                      <cas:attribute name='memberOf' value='CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu' />
        //
        //                      <cas:proxyGrantingTicket>PGTIOU-84678-8a9d2sfa23casd</cas:proxyGrantingTicket>
        //              </cas:authenticationSuccess>
        //      </cas:serviceResponse>
        //
        if (!count($extra_attributes)
            && $success_elements->item(0)->getElementsByTagName("attribute")->length != 0
        ) {
            $attr_nodes = $success_elements->item(0)
                ->getElementsByTagName("attribute");
            $firstAttr = $attr_nodes->item(0);
            if (!$firstAttr->hasChildNodes()
                && $firstAttr->hasAttribute('name')
                && $firstAttr->hasAttribute('value')
            ) {
                phpCas :: trace("Found Name-Value style attributes");
                // Nested Attributes
                foreach ($attr_nodes as $attr_node) {
                    if ($attr_node->hasAttribute('name')
                        && $attr_node->hasAttribute('value')
                    ) {
                        phpCas :: trace(
                            "Attribute [" . $attr_node->getAttribute('name')
                            . "] = " . $attr_node->getAttribute('value')
                        );
                        $this->_addAttributeToArray(
                            $extra_attributes,
                            $attr_node->getAttribute('name'),
                            $attr_node->getAttribute('value')
                        );
                    }
                }
            }
        }
 
        $this->setAttributes($extra_attributes);
        phpCAS::traceEnd();
        return true;
    }

validateCAS20()

CAS_Client::validateCAS20	(	&	$validate_url,
		&	$text_response,
		&	$tree_response,
			$renew = false
	)

This method is used to validate a cas 2.0 ST or PT; halt on failure Used for all CAS 2.0 validations.

Parameters

string	&$validate_url	the url of the reponse
string	&$text_response	the text of the repsones
string	&$tree_response	the domxml tree of the respones
bool	$renew	true to force the authentication with the CAS server

Returns

bool true when successfull and issue a CAS_AuthenticationException and false on an error

Definition at line 3259 of file Client.php.

    {
        phpCAS::traceBegin();
        phpCAS::trace($text_response);
        $result = false;
        // build the URL to validate the ticket
        if ($this->getAllowedProxyChains()->isProxyingAllowed()) {
            $validate_url = $this->getServerProxyValidateURL() . '&ticket='
                . urlencode($this->getTicket());
        } else {
            $validate_url = $this->getServerServiceValidateURL() . '&ticket='
                . urlencode($this->getTicket());
        }
 
        if ($this->isProxy()) {
            // pass the callback url for CAS proxies
            $validate_url .= '&pgtUrl=' . urlencode($this->_getCallbackURL());
        }
 
        if ($renew) {
            // pass the renew
            $validate_url .= '&renew=true';
        }
 
        // open and read the URL
        if (!$this->_readURL($validate_url, $headers, $text_response, $err_msg)) {
            phpCAS::trace(
                'could not open URL \'' . $validate_url . '\' to validate (' . $err_msg . ')'
            );
            throw new CAS_AuthenticationException(
                $this,
                'Ticket not validated',
                $validate_url,
                true/*$no_response*/
            );
            $result = false;
        }
 
        // create new DOMDocument object
        $dom = new DOMDocument();
        // Fix possible whitspace problems
        $dom->preserveWhiteSpace = false;
        // CAS servers should only return data in utf-8
        $dom->encoding = "utf-8";
        // read the response of the CAS server into a DOMDocument object
        if (!($dom->loadXML($text_response))) {
            // read failed
            throw new CAS_AuthenticationException(
                $this,
                'Ticket not validated',
                $validate_url,
                false/*$no_response*/,
                true/*$bad_response*/,
                $text_response
            );
            $result = false;
        } elseif (!($tree_response = $dom->documentElement)) {
            // read the root node of the XML tree
            // read failed
            throw new CAS_AuthenticationException(
                $this,
                'Ticket not validated',
                $validate_url,
                false/*$no_response*/,
                true/*$bad_response*/,
                $text_response
            );
            $result = false;
        } elseif ($tree_response->localName != 'serviceResponse') {
            // insure that tag name is 'serviceResponse'
            // bad root node
            throw new CAS_AuthenticationException(
                $this,
                'Ticket not validated',
                $validate_url,
                false/*$no_response*/,
                true/*$bad_response*/,
                $text_response
            );
            $result = false;
        } elseif ($tree_response->getElementsByTagName("authenticationFailure")->length != 0) {
            // authentication failed, extract the error code and message and throw exception
            $auth_fail_list = $tree_response
                ->getElementsByTagName("authenticationFailure");
            throw new CAS_AuthenticationException(
                $this,
                'Ticket not validated',
                $validate_url,
                false/*$no_response*/,
                false/*$bad_response*/,
                $text_response,
                $auth_fail_list->item(0)->getAttribute('code')/*$err_code*/,
                trim($auth_fail_list->item(0)->nodeValue)/*$err_msg*/
            );
            $result = false;
        } elseif ($tree_response->getElementsByTagName("authenticationSuccess")->length != 0) {
            // authentication succeded, extract the user name
            $success_elements = $tree_response
                ->getElementsByTagName("authenticationSuccess");
            if ($success_elements->item(0)->getElementsByTagName("user")->length == 0) {
                // no user specified => error
                throw new CAS_AuthenticationException(
                    $this,
                    'Ticket not validated',
                    $validate_url,
                    false/*$no_response*/,
                    true/*$bad_response*/,
                    $text_response
                );
                $result = false;
            } else {
                $this->_setUser(
                    trim(
                        $success_elements->item(0)->getElementsByTagName("user")->item(0)->nodeValue
                    )
                );
                $this->_readExtraAttributesCas20($success_elements);
                // Store the proxies we are sitting behind for authorization checking
                $proxyList = array();
                if (sizeof($arr = $success_elements->item(0)->getElementsByTagName("proxy")) > 0) {
                    foreach ($arr as $proxyElem) {
                        phpCAS::trace("Found Proxy: " . $proxyElem->nodeValue);
                        $proxyList[] = trim($proxyElem->nodeValue);
                    }
                    $this->_setProxies($proxyList);
                    phpCAS::trace("Storing Proxy List");
                }
                // Check if the proxies in front of us are allowed
                if (!$this->getAllowedProxyChains()->isProxyListAllowed($proxyList)) {
                    throw new CAS_AuthenticationException(
                        $this,
                        'Proxy not allowed',
                        $validate_url,
                        false/*$no_response*/,
                        true/*$bad_response*/,
                        $text_response
                    );
                    $result = false;
                } else {
                    $result = true;
                }
            }
        } else {
            throw new CAS_AuthenticationException(
                $this,
                'Ticket not validated',
                $validate_url,
                false/*$no_response*/,
                true/*$bad_response*/,
                $text_response
            );
            $result = false;
        }
        if ($result) {
            $this->_renameSession($this->getTicket());
        }
        // at this step, Ticket has been validated and $this->_user has been set,
 
        phpCAS::traceEnd($result);
        return $result;
    }

References $result, CAS_Client\_getCallbackURL(), CAS_Client\_readURL(), CAS_Client\getAllowedProxyChains(), CAS_Client\getServerProxyValidateURL(), CAS_Client\getServerServiceValidateURL(), CAS_Client\getTicket(), CAS_Client\isProxy(), phpCAS\trace(), and phpCAS\traceBegin().

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