Move the creation of the LogoutRequest and the LogoutResponse object …

…to separate functions

README.md

@@ -84,15 +84,15 @@ Installation
 
 git clone git@github.com:SAML-Toolkits/php-saml.git
 
-Then pull the 3.X.X branch/tag
+Then pull the 4.X.X branch/tag
 
 #### Option 2. Download from github ####
 
 The toolkit is hosted on github. You can download it from:
 
  * https://github.com/SAML-Toolkits/php-saml/releases
 
-Search for 3.X.X releases
+Search for 4.X.X releases
 
 Copy the core of the library inside the php application. (each application has its
 structure so take your time to locate the PHP SAML toolkit in the best place).
@@ -124,7 +124,7 @@ Compatibility
 
 This 4.X.X supports PHP >=7.3 .
 
-It is not compatible with PHP5.6 or PHP7.0.
+It is not compatible with PHP5.6 or PHP7.0, PHP7.1 or PHP7.2
 
 Namespaces
 ----------
@@ -1257,6 +1257,9 @@ Main class of SAML PHP Toolkit
  * `getLastRequestID` - Gets the ID of the last AuthNRequest or LogoutRequest generated by the Service Provider.
  * `getLastRequestXML` - Returns the most recently-constructed/processed XML SAML request (AuthNRequest, LogoutRequest)
  * `getLastResponseXML` - Returns the most recently-constructed/processed XML SAML response (SAMLResponse, LogoutResponse). If the SAMLResponse had an encrypted assertion, decrypts it.
+* `buildAuthnRequest` - Creates an AuthnRequest
+* `buildLogoutRequest` - Creates an LogoutRequest
+* `buildLogoutResponse` - Constructs a Logout Response object (Initialize params from settings and if provided load the Logout Response).
 
 
 ##### OneLogin\Saml2\AuthnRequest - `AuthnRequest.php` #####

src/Saml2/Auth.php

@@ -280,7 +280,7 @@ public function processSLO($keepLocalSession = false, $requestId = null, $retrie
         $this->_errors = array();
         $this->_lastError = $this->_lastErrorException = null;
         if (isset($_GET['SAMLResponse'])) {
-            $logoutResponse = new LogoutResponse($this->_settings, $_GET['SAMLResponse']);
+            $logoutResponse = $this->buildLogoutResponse($this->_settings, $_GET['SAMLResponse']);
             $this->_lastResponse = $logoutResponse->getXML();
             if (!$logoutResponse->isValid($requestId, $retrieveParametersFromServer)) {
                 $this->_errors[] = 'invalid_logout_response';
@@ -300,7 +300,7 @@ public function processSLO($keepLocalSession = false, $requestId = null, $retrie
                 }
             }
         } else if (isset($_GET['SAMLRequest'])) {
-            $logoutRequest = new LogoutRequest($this->_settings, $_GET['SAMLRequest']);
+            $logoutRequest = $this->buildLogoutRequest($this->_settings, $_GET['SAMLRequest']);
             $this->_lastRequest = $logoutRequest->getXML();
             if (!$logoutRequest->isValid($retrieveParametersFromServer)) {
                 $this->_errors[] = 'invalid_logout_request';
@@ -316,7 +316,7 @@ public function processSLO($keepLocalSession = false, $requestId = null, $retrie
                 }
                 $inResponseTo = $logoutRequest->id;
                 $this->_lastMessageId = $logoutRequest->id;
-                $responseBuilder = new LogoutResponse($this->_settings);
+                $responseBuilder = $this->buildLogoutResponse($this->_settings);
                 $responseBuilder->build($inResponseTo);
                 $this->_lastResponse = $responseBuilder->getXML();
 
@@ -598,7 +598,7 @@ public function logout($returnTo = null, array $parameters = array(), $nameId =
             $nameIdFormat = $this->_nameidFormat;
         }
 
-        $logoutRequest = new LogoutRequest($this->_settings, null, $nameId, $sessionIndex, $nameIdFormat, $nameIdNameQualifier, $nameIdSPNameQualifier);
+        $logoutRequest = $this->buildLogoutRequest($this->_settings, null, $nameId, $sessionIndex, $nameIdFormat, $nameIdNameQualifier, $nameIdSPNameQualifier);
 
         $this->_lastRequest = $logoutRequest->getXML();
         $this->_lastRequestID = $logoutRequest->id;
@@ -674,11 +674,42 @@ public function getLastRequestID()
      *
      * @return AuthnRequest The AuthnRequest object
      */
-    public function buildAuthnRequest($settings, $forceAuthn, $isPassive, $setNameIdPolicy, $nameIdValueReq = null)
+    public function buildAuthnRequest(Settings $settings, $forceAuthn, $isPassive, $setNameIdPolicy, $nameIdValueReq = null)
     {
         return new AuthnRequest($settings, $forceAuthn, $isPassive, $setNameIdPolicy, $nameIdValueReq);
     }
 
+    /**
+     * Creates an LogoutRequest
+     *
+     * @param Settings    $settings            Settings
+     * @param string|null $request             A UUEncoded Logout Request.
+     * @param string|null $nameId              The NameID that will be set in the LogoutRequest.
+     * @param string|null $sessionIndex        The SessionIndex (taken from the SAML Response in the SSO process).
+     * @param string|null $nameIdFormat        The NameID Format will be set in the LogoutRequest.
+     * @param string|null $nameIdNameQualifier The NameID NameQualifier will be set in the LogoutRequest.
+     * @param string|null $nameIdSPNameQualifier The NameID SP NameQualifier will be set in the LogoutRequest.
+     */
+    public function buildLogoutRequest(Settings $settings, $request = null, $nameId = null, $sessionIndex = null, $nameIdFormat = null, $nameIdNameQualifier = null, $nameIdSPNameQualifier = null)
+    {
+        return new LogoutRequest($settings, $request, $nameId, $sessionIndex, $nameIdFormat, $nameIdNameQualifier, $nameIdSPNameQualifier);
+    }
+
+    /**
+     * Constructs a Logout Response object (Initialize params from settings and if provided
+     * load the Logout Response.
+     *
+     * @param Settings    $settings Settings.
+     * @param string|null $response An UUEncoded SAML Logout response from the IdP.
+     *
+     * @throws Error
+     * @throws Exception
+     */
+    public function buildLogoutResponse(Settings $settings, $response = null)
+    {
+        return new LogoutResponse($settings, $response);
+    }
+
     /**
      * Generates the Signature for a SAML Request
      *