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<?php |
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$defflip = (!cfip()) ? exit(header('HTTP/1.1 401 Unauthorized')) : 1; |
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class CSRFToken Extends Base { |
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public $valid = 0; |
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/** |
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* Gets a basic csrf token |
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* @param string $user user or IP/host address |
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* @param string $type page name or other unique per-page identifier |
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*/ |
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public function getBasic($user, $type) { |
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$date = date('m/d/y/H/i'); |
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$d = explode('/', $date); |
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$seed = $this->buildSeed($user.$type, $d[0], $d[1], $d[2], $d[3], $d[4]); |
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return $this->getHash($seed); |
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} |
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/** |
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* Returns +1 min up to +15 min rollovers hashes |
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* @param string $user user or IP/host address |
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* @param string $type page name or other unique per-page identifier |
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* @return array 1 minute ago up to 15 minute ago hashes |
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*/ |
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public function checkAdditional($user, $type) { |
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$date = date('m/d/y/H/i'); |
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$d = explode('/', $date); |
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$hashes = array(); |
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for ($x = 1; $x < 16; $x++){ |
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for ($y = 4;$d[$y]-- == 0;$y--); |
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if ($d[4] < 0) { $d[4] = 59; } |
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$hashes[$x-1] = $this->getHash($this->buildSeed($user.$type, $d[0], $d[1], $d[2], $d[3], $d[4])); |
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} |
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return $hashes; |
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} |
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/** |
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* Builds a seed with the given data |
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* @param string $data |
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* @param int $year |
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* @param int $month |
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* @param int $day |
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* @param int $hour |
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* @param int $minute |
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* @return string seed |
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*/ |
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private function buildSeed($data, $year, $month, $day, $hour, $minute) { |
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return $this->salty.$year.$month.$day.$data.$hour.$minute.$this->salt; |
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} |
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/** |
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* Checks if the token is correct as is, if not checks for rollovers with checkAdditional() |
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* @param string $user user or IP/host address |
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* @param string $type page name or other unique per-page identifier |
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* @param string $token token to check against |
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* @return boolean |
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*/ |
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public function checkBasic($user, $type, $token) { |
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if (empty($token)) return false; |
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$token_now = $this->getBasic($user, $type); |
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if ($token_now !== $token) { |
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$tokens_check = $this->checkAdditional($user, $type); |
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$match = 0; |
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foreach ($tokens_check as $checkit) { |
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if ($checkit == $token) $match = 1; |
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} |
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return ($match) ? true : false; |
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} else { |
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return true; |
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} |
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} |
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/** |
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* Convenience method to get a token expired message with a token type, and ? image with description |
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* @param string $tokentype if you want a specific tokentype, set it here |
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* @param string $dowhat What will be put in the string "Simply $dowhat again to...", default is try |
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*/ |
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public static function getErrorWithDescriptionHTML($tokentype="", $dowhat="try") { |
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return ($tokentype !== "") ? "$tokentype token expired, please try again ".self::getDescriptionImageHTML($dowhat) : "Token expired, please try again ".self::getDescriptionImageHTML($dowhat); |
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} |
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/** |
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* Gets the HTML image (?) with short csrf description for users for the incorrect token error message |
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* @param dowhat string What will be put in the string "Simply $dowhat again to...", default is try |
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* @return string HTML image with description |
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*/ |
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public static function getDescriptionImageHTML($dowhat="try") { |
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$string = "<img src='site_assets/bootstrap/images/questionmark.png' "; |
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$string.= "title='Tokens are used to help us mitigate attacks; Simply "; |
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$string.= htmlentities(strip_tags($dowhat)); |
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$string.= " again to continue' width='20px' height='20px'>"; |
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return $string; |
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} |
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private function getHash($string) { |
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return hash('sha256', $this->salty.$string.$this->salt); |
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} |
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} |
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$csrftoken = new CSRFToken(); |
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$csrftoken->setDebug($debug); |
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$csrftoken->setMysql($mysqli); |
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$csrftoken->setSalt($config['SALT']); |
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$csrftoken->setSalty($config['SALTY']); |
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$csrftoken->setMail($mail); |
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$csrftoken->setUser($user); |
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$csrftoken->setToken($oToken); |
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$csrftoken->setConfig($config); |
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$csrftoken->setErrorCodes($aErrorCodes); |
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MPOS /
php-mpos
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: