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<?php /** * @package RSForm! Pro * @copyright (C) 2007-2019 www.rsjoomla.com * @license GPL, http://www.gnu.org/licenses/gpl-2.0.html */ defined('_JEXEC') or die('Restricted access'); class RSFormIBAN { /** * Semantic IBAN structure constants */ const COUNTRY_CODE_OFFSET = 0; const COUNTRY_CODE_LENGTH = 2; const CHECKSUM_OFFSET = 2; const CHECKSUM_LENGTH = 2; const ACCOUNT_IDENTIFICATION_OFFSET = 4; const INSTITUTE_IDENTIFICATION_OFFSET = 4; const INSTITUTE_IDENTIFICATION_LENGTH = 4; const BANK_ACCOUNT_NUMBER_OFFSET = 8; const BANK_ACCOUNT_NUMBER_LENGTH = 10; /** * @var array Country code to size, regex format for each country that supports IBAN */ public static $ibanFormatMap = array( 'AA' => array(12, '^[A-Z0-9]{12}$'), 'AD' => array(20, '^[0-9]{4}[0-9]{4}[A-Z0-9]{12}$'), 'AE' => array(19, '^[0-9]{3}[0-9]{16}$'), 'AL' => array(24, '^[0-9]{8}[A-Z0-9]{16}$'), 'AO' => array(21, '^[0-9]{21}$'), 'AT' => array(16, '^[0-9]{5}[0-9]{11}$'), 'AX' => array(14, '^[0-9]{6}[0-9]{7}[0-9]{1}$'), 'AZ' => array(24, '^[A-Z]{4}[A-Z0-9]{20}$'), 'BA' => array(16, '^[0-9]{3}[0-9]{3}[0-9]{8}[0-9]{2}$'), 'BE' => array(12, '^[0-9]{3}[0-9]{7}[0-9]{2}$'), 'BF' => array(23, '^[0-9]{23}$'), 'BG' => array(18, '^[A-Z]{4}[0-9]{4}[0-9]{2}[A-Z0-9]{8}$'), 'BH' => array(18, '^[A-Z]{4}[A-Z0-9]{14}$'), 'BI' => array(12, '^[0-9]{12}$'), 'BJ' => array(24, '^[A-Z]{1}[0-9]{23}$'), 'BL' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'BR' => array(25, '^[0-9]{8}[0-9]{5}[0-9]{10}[A-Z]{1}[A-Z0-9]{1}$'), 'CH' => array(17, '^[0-9]{5}[A-Z0-9]{12}$'), 'CI' => array(24, '^[A-Z]{1}[0-9]{23}$'), 'CM' => array(23, '^[0-9]{23}$'), 'CR' => array(17, '^[0-9]{4}[0-9]{13}$'), 'CV' => array(21, '^[0-9]{21}$'), 'CY' => array(24, '^[0-9]{3}[0-9]{5}[A-Z0-9]{16}$'), 'CZ' => array(20, '^[0-9]{4}[0-9]{6}[0-9]{10}$'), 'DE' => array(18, '^[0-9]{8}[0-9]{10}$'), 'DK' => array(14, '^[0-9]{4}[0-9]{9}[0-9]{1}$'), 'DO' => array(24, '^[A-Z0-9]{4}[0-9]{20}$'), 'DZ' => array(20, '^[0-9]{20}$'), 'EE' => array(16, '^[0-9]{2}[0-9]{2}[0-9]{11}[0-9]{1}$'), 'ES' => array(20, '^[0-9]{4}[0-9]{4}[0-9]{1}[0-9]{1}[0-9]{10}$'), 'FI' => array(14, '^[0-9]{6}[0-9]{7}[0-9]{1}$'), 'FO' => array(14, '^[0-9]{4}[0-9]{9}[0-9]{1}$'), 'FR' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'GB' => array(18, '^[A-Z]{4}[0-9]{6}[0-9]{8}$'), 'GE' => array(18, '^[A-Z]{2}[0-9]{16}$'), 'GF' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'GI' => array(19, '^[A-Z]{4}[A-Z0-9]{15}$'), 'GL' => array(14, '^[0-9]{4}[0-9]{9}[0-9]{1}$'), 'GP' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'GR' => array(23, '^[0-9]{3}[0-9]{4}[A-Z0-9]{16}$'), 'GT' => array(24, '^[A-Z0-9]{4}[A-Z0-9]{20}$'), 'HR' => array(17, '^[0-9]{7}[0-9]{10}$'), 'HU' => array(24, '^[0-9]{3}[0-9]{4}[0-9]{1}[0-9]{15}[0-9]{1}$'), 'IE' => array(18, '^[A-Z]{4}[0-9]{6}[0-9]{8}$'), 'IL' => array(19, '^[0-9]{3}[0-9]{3}[0-9]{13}$'), 'IR' => array(22, '^[0-9]{22}$'), 'IS' => array(22, '^[0-9]{4}[0-9]{2}[0-9]{6}[0-9]{10}$'), 'IT' => array(23, '^[A-Z]{1}[0-9]{5}[0-9]{5}[A-Z0-9]{12}$'), 'JO' => array(26, '^[A-Z]{4}[0-9]{4}[A-Z0-9]{18}$'), 'KW' => array(26, '^[A-Z]{4}[A-Z0-9]{22}$'), 'KZ' => array(16, '^[0-9]{3}[A-Z0-9]{13}$'), 'LB' => array(24, '^[0-9]{4}[A-Z0-9]{20}$'), 'LC' => array(28, '^[A-Z]{4}[A-Z0-9]{24}$'), 'LI' => array(17, '^[0-9]{5}[A-Z0-9]{12}$'), 'LT' => array(16, '^[0-9]{5}[0-9]{11}$'), 'LU' => array(16, '^[0-9]{3}[A-Z0-9]{13}$'), 'LV' => array(17, '^[A-Z]{4}[A-Z0-9]{13}$'), 'MC' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'MD' => array(20, '^[A-Z0-9]{2}[A-Z0-9]{18}$'), 'ME' => array(18, '^[0-9]{3}[0-9]{13}[0-9]{2}$'), 'MF' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'MG' => array(23, '^[0-9]{23}$'), 'MK' => array(15, '^[0-9]{3}[A-Z0-9]{10}[0-9]{2}$'), 'ML' => array(24, '^[A-Z]{1}[0-9]{23}$'), 'MQ' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'MR' => array(23, '^[0-9]{5}[0-9]{5}[0-9]{11}[0-9]{2}$'), 'MT' => array(27, '^[A-Z]{4}[0-9]{5}[A-Z0-9]{18}$'), 'MU' => array(26, '^[A-Z]{4}[0-9]{2}[0-9]{2}[0-9]{12}[0-9]{3}[A-Z]{3}$'), 'MZ' => array(21, '^[0-9]{21}$'), 'NC' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'NL' => array(14, '^[A-Z]{4}[0-9]{10}$'), 'NO' => array(11, '^[0-9]{4}[0-9]{6}[0-9]{1}$'), 'PF' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'PK' => array(20, '^[A-Z]{4}[A-Z0-9]{16}$'), 'PL' => array(24, '^[0-9]{8}[0-9]{16}$'), 'PM' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'PS' => array(25, '^[A-Z]{4}[A-Z0-9]{21}$'), 'PT' => array(21, '^[0-9]{4}[0-9]{4}[0-9]{11}[0-9]{2}$'), 'QA' => array(25, '^[A-Z]{4}[0-9]{4}[A-Z0-9]{17}$'), 'RE' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'RO' => array(20, '^[A-Z]{4}[A-Z0-9]{16}$'), 'RS' => array(18, '^[0-9]{3}[0-9]{13}[0-9]{2}$'), 'SA' => array(20, '^[0-9]{2}[A-Z0-9]{18}$'), 'SC' => array(27, '^[A-Z]{4}[0-9]{4}[0-9]{16}[A-Z]{3}$'), 'SE' => array(20, '^[0-9]{3}[0-9]{16}[0-9]{1}$'), 'SI' => array(15, '^[0-9]{5}[0-9]{8}[0-9]{2}$'), 'SK' => array(20, '^[0-9]{4}[0-9]{6}[0-9]{10}$'), 'SM' => array(23, '^[A-Z]{1}[0-9]{5}[0-9]{5}[A-Z0-9]{12}$'), 'SN' => array(24, '^[A-Z]{1}[0-9]{23}$'), 'ST' => array(21, '^[0-9]{8}[0-9]{11}[0-9]{2}$'), 'TF' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'TL' => array(19, '^[0-9]{3}[0-9]{14}[0-9]{2}$'), 'TN' => array(20, '^[0-9]{2}[0-9]{3}[0-9]{13}[0-9]{2}$'), 'TR' => array(22, '^[0-9]{5}[0-9]{1}[A-Z0-9]{16}$'), 'UA' => array(25, '^[0-9]{6}[A-Z0-9]{19}$'), 'VG' => array(20, '^[A-Z]{4}[0-9]{16}$'), 'WF' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$'), 'XK' => array(16, '^[0-9]{4}[0-9]{10}[0-9]{2}$'), 'YT' => array(23, '^[0-9]{5}[0-9]{5}[A-Z0-9]{11}[0-9]{2}$') ); /** * @var string Internal IBAN number */ private $iban; /** * IBAN constructor. * * @param $iban */ public function __construct($iban) { $this->iban = $this->normalize($iban); } /** * Validates the supplied IBAN and provides passthrough failure message when validation fails * * @return bool */ public function validate() { if (!$this->isCountryCodeValid() || !$this->isLengthValid() || !$this->isFormatValid() || !$this->isChecksumValid()) { return false; } else { return true; } } /** * Pretty print IBAN * * @return string */ public function format() { return sprintf( '%s %s %s', $this->getCountryCode() . $this->getChecksum(), substr($this->getInstituteIdentification(), 0, 4), implode(' ', str_split($this->getBankAccountNumber(), 4)) ); } /** * Extract country code from IBAN * * @return string */ public function getCountryCode() { return substr($this->iban, static::COUNTRY_CODE_OFFSET, static::COUNTRY_CODE_LENGTH); } /** * Extract checksum number from IBAN * * @return string */ public function getChecksum() { return substr($this->iban, static::CHECKSUM_OFFSET, static::CHECKSUM_LENGTH); } /** * Extract Account Identification from IBAN * * @return string */ public function getAccountIdentification() { return substr($this->iban, static::ACCOUNT_IDENTIFICATION_OFFSET); } /** * Extract Institute from IBAN * * @return string */ public function getInstituteIdentification() { return substr($this->iban, static::INSTITUTE_IDENTIFICATION_OFFSET, static::INSTITUTE_IDENTIFICATION_LENGTH); } /** * Extract Bank Account number from IBAN * * @return string */ public function getBankAccountNumber() { $countryCode = $this->getCountryCode(); $length = static::$ibanFormatMap[$countryCode][0] - static::INSTITUTE_IDENTIFICATION_LENGTH; return substr($this->iban, static::BANK_ACCOUNT_NUMBER_OFFSET, $length); } /** * Validate IBAN length boundaries * * @return bool */ private function isLengthValid() { $countryCode = $this->getCountryCode(); $validLength = static::COUNTRY_CODE_LENGTH + static::CHECKSUM_LENGTH + static::$ibanFormatMap[$countryCode][0]; return strlen($this->iban) === $validLength; } /** * Validate IBAN country code * * @return bool */ private function isCountryCodeValid() { $countryCode = $this->getCountryCode(); return !(isset(static::$ibanFormatMap[$countryCode]) === false); } /** * Validate the IBAN format according to the country code * * @return bool */ private function isFormatValid() { $countryCode = $this->getCountryCode(); $accountIdentification = $this->getAccountIdentification(); return !(preg_match('/' . static::$ibanFormatMap[$countryCode][1] . '/', $accountIdentification) !== 1); } /** * Validates if the checksum number is valid according to the IBAN * * @return bool */ private function isChecksumValid() { $countryCode = $this->getCountryCode(); $checksum = $this->getChecksum(); $accountIdentification = $this->getAccountIdentification(); $numericCountryCode = $this->getNumericCountryCode($countryCode); $numericAccountIdentification = $this->getNumericAccountIdentification($accountIdentification); $invertedIban = $numericAccountIdentification . $numericCountryCode . $checksum; return $this->bcmod($invertedIban, 97) === '1'; } /** * Extract country code from the IBAN as numeric code * * @param $countryCode * * @return string */ private function getNumericCountryCode($countryCode) { return $this->getNumericRepresentation($countryCode); } /** * Extract account identification from the IBAN as numeric value * * @param $accountIdentification * * @return string */ private function getNumericAccountIdentification($accountIdentification) { return $this->getNumericRepresentation($accountIdentification); } /** * Retrieve numeric presentation of a letter part of the IBAN * * @param $letterRepresentation * * @return string */ private function getNumericRepresentation($letterRepresentation) { $numericRepresentation = ''; foreach (str_split($letterRepresentation) as $char) { $ord = ord($char); if ($ord >= 65 && $ord <= 90) { $numericRepresentation .= (string) ($ord - 55); } elseif ($ord >= 48 && $ord <= 57) { $numericRepresentation .= (string) ($ord - 48); } } return $numericRepresentation; } /** * Normalize IBAN by removing non-relevant characters and proper casing * * @param $iban * * @return mixed|string */ private function normalize($iban) { return preg_replace('/[^a-z0-9]+/i', '', trim(strtoupper($iban))); } /** * Get modulus of an arbitrary precision number * * @param $x * @param $y * * @return string */ private function bcmod($x, $y) { if (!function_exists('bcmod')) { $take = 5; $mod = ''; do { $a = (int)$mod . substr($x, 0, $take); $x = substr($x, $take); $mod = $a % $y; } while (strlen($x)); return (string)$mod; } else { return bcmod($x, $y); } } }