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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace SilverStripe\Security\MemberAuthenticator;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Control\Cookie;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Control\Director;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Control\HTTPRequest;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Control\Session;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Security\AuthenticationHandler;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use SilverStripe\Security\Member;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Authenticate a member pased on a session cookie  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class SessionAuthenticationHandler implements AuthenticationHandler  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $sessionVariable;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Get the session variable name used to track member ID  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getSessionVariable()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->sessionVariable;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Set the session variable name used to track member ID  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $sessionVariable  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function setSessionVariable($sessionVariable)  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->sessionVariable = $sessionVariable;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param HTTPRequest $request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return Member  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function authenticateRequest(HTTPRequest $request)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // If ID is a bad ID it will be treated as if the user is not logged in, rather than throwing a  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // ValidationException  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $id = Session::get($this->getSessionVariable());  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (!$id) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        /** @var Member $member */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $member = Member::get()->byID($id);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $member;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param Member $member  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param bool $persistent  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param HTTPRequest $request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function logIn(Member $member, $persistent = false, HTTPRequest $request = null)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        static::regenerateSessionId();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        Session::set($this->getSessionVariable(), $member->ID);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // This lets apache rules detect whether the user has logged in  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // @todo make this a setting on the authentication handler  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (Member::config()->get('login_marker_cookie')) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            Cookie::set(Member::config()->get('login_marker_cookie'), 1, 0); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Regenerate the session_id.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected static function regenerateSessionId()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (!Member::config()->get('session_regenerate_id')) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // This can be called via CLI during testing.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (Director::is_cli()) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $file = '';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $line = '';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // @ is to supress win32 warnings/notices when session wasn't cleaned up properly  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // There's nothing we can do about this, because it's an operating system function!  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (!headers_sent($file, $line)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            @session_regenerate_id(true);  | 
            
                            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param HTTPRequest $request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function logOut(HTTPRequest $request = null)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        Session::clear($this->getSessionVariable());  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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If you suppress an error, we recommend checking for the error condition explicitly: