1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  6:  */
  7: 
  8: namespace Nette\Http;
  9: 
 10: use Nette,
 11:     Nette\Security\IIdentity;
 12: 
 13: 
 14: /**
 15:  * Session storage for user object.
 16:  *
 17:  * @author  David Grudl
 18:  * @author  Jan Tichý
 19:  */
 20: class UserStorage extends Nette\Object implements Nette\Security\IUserStorage
 21: {
 22:     /** @var string */
 23:     private $namespace = '';
 24: 
 25:     /** @var Session */
 26:     private $sessionHandler;
 27: 
 28:     /** @var SessionSection */
 29:     private $sessionSection;
 30: 
 31: 
 32:     public function  __construct(Session $sessionHandler)
 33:     {
 34:         $this->sessionHandler = $sessionHandler;
 35:     }
 36: 
 37: 
 38:     /**
 39:      * Sets the authenticated status of this user.
 40:      * @param  bool
 41:      * @return self
 42:      */
 43:     public function setAuthenticated($state)
 44:     {
 45:         $section = $this->getSessionSection(TRUE);
 46:         $section->authenticated = (bool) $state;
 47: 
 48:         // Session Fixation defence
 49:         $this->sessionHandler->regenerateId();
 50: 
 51:         if ($state) {
 52:             $section->reason = NULL;
 53:             $section->authTime = time(); // informative value
 54: 
 55:         } else {
 56:             $section->reason = self::MANUAL;
 57:             $section->authTime = NULL;
 58:         }
 59:         return $this;
 60:     }
 61: 
 62: 
 63:     /**
 64:      * Is this user authenticated?
 65:      * @return bool
 66:      */
 67:     public function isAuthenticated()
 68:     {
 69:         $session = $this->getSessionSection(FALSE);
 70:         return $session && $session->authenticated;
 71:     }
 72: 
 73: 
 74:     /**
 75:      * Sets the user identity.
 76:      * @return self
 77:      */
 78:     public function setIdentity(IIdentity $identity = NULL)
 79:     {
 80:         $this->getSessionSection(TRUE)->identity = $identity;
 81:         return $this;
 82:     }
 83: 
 84: 
 85:     /**
 86:      * Returns current user identity, if any.
 87:      * @return Nette\Security\IIdentity|NULL
 88:      */
 89:     public function getIdentity()
 90:     {
 91:         $session = $this->getSessionSection(FALSE);
 92:         return $session ? $session->identity : NULL;
 93:     }
 94: 
 95: 
 96:     /**
 97:      * Changes namespace; allows more users to share a session.
 98:      * @param  string
 99:      * @return self
100:      */
101:     public function setNamespace($namespace)
102:     {
103:         if ($this->namespace !== $namespace) {
104:             $this->namespace = (string) $namespace;
105:             $this->sessionSection = NULL;
106:         }
107:         return $this;
108:     }
109: 
110: 
111:     /**
112:      * Returns current namespace.
113:      * @return string
114:      */
115:     public function getNamespace()
116:     {
117:         return $this->namespace;
118:     }
119: 
120: 
121:     /**
122:      * Enables log out after inactivity.
123:      * @param  string|int|DateTime Number of seconds or timestamp
124:      * @param  int Log out when the browser is closed | Clear the identity from persistent storage?
125:      * @return self
126:      */
127:     public function setExpiration($time, $flags = 0)
128:     {
129:         $section = $this->getSessionSection(TRUE);
130:         if ($time) {
131:             $time = Nette\DateTime::from($time)->format('U');
132:             $section->expireTime = $time;
133:             $section->expireDelta = $time - time();
134: 
135:         } else {
136:             unset($section->expireTime, $section->expireDelta);
137:         }
138: 
139:         $section->expireIdentity = (bool) ($flags & self::CLEAR_IDENTITY);
140:         $section->expireBrowser = (bool) ($flags & self::BROWSER_CLOSED);
141:         $section->browserCheck = TRUE;
142:         $section->setExpiration(0, 'browserCheck');
143:         $section->setExpiration($time, 'foo'); // time check
144:         return $this;
145:     }
146: 
147: 
148:     /**
149:      * Why was user logged out?
150:      * @return int
151:      */
152:     public function getLogoutReason()
153:     {
154:         $session = $this->getSessionSection(FALSE);
155:         return $session ? $session->reason : NULL;
156:     }
157: 
158: 
159:     /**
160:      * Returns and initializes $this->sessionSection.
161:      * @return SessionSection
162:      */
163:     protected function getSessionSection($need)
164:     {
165:         if ($this->sessionSection !== NULL) {
166:             return $this->sessionSection;
167:         }
168: 
169:         if (!$need && !$this->sessionHandler->exists()) {
170:             return NULL;
171:         }
172: 
173:         $this->sessionSection = $section = $this->sessionHandler->getSection('Nette.Http.UserStorage/' . $this->namespace);
174: 
175:         if (!$section->identity instanceof IIdentity || !is_bool($section->authenticated)) {
176:             $section->remove();
177:         }
178: 
179:         if ($section->authenticated && $section->expireBrowser && !$section->browserCheck) { // check if browser was closed?
180:             $section->reason = self::BROWSER_CLOSED;
181:             $section->authenticated = FALSE;
182:             if ($section->expireIdentity) {
183:                 unset($section->identity);
184:             }
185:         }
186: 
187:         if ($section->authenticated && $section->expireDelta > 0) { // check time expiration
188:             if ($section->expireTime < time()) {
189:                 $section->reason = self::INACTIVITY;
190:                 $section->authenticated = FALSE;
191:                 if ($section->expireIdentity) {
192:                     unset($section->identity);
193:                 }
194:             }
195:             $section->expireTime = time() + $section->expireDelta; // sliding expiration
196:         }
197: 
198:         if (!$section->authenticated) {
199:             unset($section->expireTime, $section->expireDelta, $section->expireIdentity,
200:                 $section->expireBrowser, $section->browserCheck, $section->authTime);
201:         }
202: 
203:         return $this->sessionSection;
204:     }
205: 
206: }
207: