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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Validator\Constraints;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
use Symfony\Component\Validator\Exception\UnexpectedValueException;
/**
* @author Manuel Reinhard <manu@sprain.ch>
* @author Michael Schummel
* @author Bernhard Schussek <bschussek@gmail.com>
*
* @see http://www.michael-schummel.de/2007/10/05/iban-prufung-mit-php/
*/
class IbanValidator extends ConstraintValidator
{
/**
* IBAN country specific formats.
*
* The first 2 characters from an IBAN format are the two-character ISO country code.
* The following 2 characters represent the check digits calculated from the rest of the IBAN characters.
* The rest are up to thirty alphanumeric characters for
* a BBAN (Basic Bank Account Number) which has a fixed length per country and,
* included within it, a bank identifier with a fixed position and a fixed length per country
*
* @see https://www.swift.com/sites/default/files/resources/iban_registry.pdf
*/
private static $formats = [
'AD' => 'AD\d{2}\d{4}\d{4}[\dA-Z]{12}', // Andorra
'AE' => 'AE\d{2}\d{3}\d{16}', // United Arab Emirates
'AL' => 'AL\d{2}\d{8}[\dA-Z]{16}', // Albania
'AO' => 'AO\d{2}\d{21}', // Angola
'AT' => 'AT\d{2}\d{5}\d{11}', // Austria
'AX' => 'FI\d{2}\d{6}\d{7}\d{1}', // Aland Islands
'AZ' => 'AZ\d{2}[A-Z]{4}[\dA-Z]{20}', // Azerbaijan
'BA' => 'BA\d{2}\d{3}\d{3}\d{8}\d{2}', // Bosnia and Herzegovina
'BE' => 'BE\d{2}\d{3}\d{7}\d{2}', // Belgium
'BF' => 'BF\d{2}\d{23}', // Burkina Faso
'BG' => 'BG\d{2}[A-Z]{4}\d{4}\d{2}[\dA-Z]{8}', // Bulgaria
'BH' => 'BH\d{2}[A-Z]{4}[\dA-Z]{14}', // Bahrain
'BI' => 'BI\d{2}\d{12}', // Burundi
'BJ' => 'BJ\d{2}[A-Z]{1}\d{23}', // Benin
'BY' => 'BY\d{2}[\dA-Z]{4}\d{4}[\dA-Z]{16}', // Belarus - https://bank.codes/iban/structure/belarus/
'BL' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Saint Barthelemy
'BR' => 'BR\d{2}\d{8}\d{5}\d{10}[A-Z][\dA-Z]', // Brazil
'CG' => 'CG\d{2}\d{23}', // Congo
'CH' => 'CH\d{2}\d{5}[\dA-Z]{12}', // Switzerland
'CI' => 'CI\d{2}[A-Z]{1}\d{23}', // Ivory Coast
'CM' => 'CM\d{2}\d{23}', // Cameron
'CR' => 'CR\d{2}0\d{3}\d{14}', // Costa Rica
'CV' => 'CV\d{2}\d{21}', // Cape Verde
'CY' => 'CY\d{2}\d{3}\d{5}[\dA-Z]{16}', // Cyprus
'CZ' => 'CZ\d{2}\d{20}', // Czech Republic
'DE' => 'DE\d{2}\d{8}\d{10}', // Germany
'DO' => 'DO\d{2}[\dA-Z]{4}\d{20}', // Dominican Republic
'DK' => 'DK\d{2}\d{4}\d{10}', // Denmark
'DZ' => 'DZ\d{2}\d{20}', // Algeria
'EE' => 'EE\d{2}\d{2}\d{2}\d{11}\d{1}', // Estonia
'ES' => 'ES\d{2}\d{4}\d{4}\d{1}\d{1}\d{10}', // Spain (also includes Canary Islands, Ceuta and Melilla)
'FI' => 'FI\d{2}\d{6}\d{7}\d{1}', // Finland
'FO' => 'FO\d{2}\d{4}\d{9}\d{1}', // Faroe Islands
'FR' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
'GF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // French Guyana
'GB' => 'GB\d{2}[A-Z]{4}\d{6}\d{8}', // United Kingdom of Great Britain and Northern Ireland
'GE' => 'GE\d{2}[A-Z]{2}\d{16}', // Georgia
'GI' => 'GI\d{2}[A-Z]{4}[\dA-Z]{15}', // Gibraltar
'GL' => 'GL\d{2}\d{4}\d{9}\d{1}', // Greenland
'GP' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Guadeloupe
'GR' => 'GR\d{2}\d{3}\d{4}[\dA-Z]{16}', // Greece
'GT' => 'GT\d{2}[\dA-Z]{4}[\dA-Z]{20}', // Guatemala
'HR' => 'HR\d{2}\d{7}\d{10}', // Croatia
'HU' => 'HU\d{2}\d{3}\d{4}\d{1}\d{15}\d{1}', // Hungary
'IE' => 'IE\d{2}[A-Z]{4}\d{6}\d{8}', // Ireland
'IL' => 'IL\d{2}\d{3}\d{3}\d{13}', // Israel
'IR' => 'IR\d{2}\d{22}', // Iran
'IS' => 'IS\d{2}\d{4}\d{2}\d{6}\d{10}', // Iceland
'IT' => 'IT\d{2}[A-Z]{1}\d{5}\d{5}[\dA-Z]{12}', // Italy
'JO' => 'JO\d{2}[A-Z]{4}\d{4}[\dA-Z]{18}', // Jordan
'KW' => 'KW\d{2}[A-Z]{4}\d{22}', // KUWAIT
'KZ' => 'KZ\d{2}\d{3}[\dA-Z]{13}', // Kazakhstan
'LB' => 'LB\d{2}\d{4}[\dA-Z]{20}', // LEBANON
'LI' => 'LI\d{2}\d{5}[\dA-Z]{12}', // Liechtenstein (Principality of)
'LT' => 'LT\d{2}\d{5}\d{11}', // Lithuania
'LU' => 'LU\d{2}\d{3}[\dA-Z]{13}', // Luxembourg
'LV' => 'LV\d{2}[A-Z]{4}[\dA-Z]{13}', // Latvia
'MC' => 'MC\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Monaco
'MD' => 'MD\d{2}[\dA-Z]{2}[\dA-Z]{18}', // Moldova
'ME' => 'ME\d{2}\d{3}\d{13}\d{2}', // Montenegro
'MF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Saint Martin (French part)
'MG' => 'MG\d{2}\d{23}', // Madagascar
'MK' => 'MK\d{2}\d{3}[\dA-Z]{10}\d{2}', // Macedonia, Former Yugoslav Republic of
'ML' => 'ML\d{2}[A-Z]{1}\d{23}', // Mali
'MQ' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Martinique
'MR' => 'MR13\d{5}\d{5}\d{11}\d{2}', // Mauritania
'MT' => 'MT\d{2}[A-Z]{4}\d{5}[\dA-Z]{18}', // Malta
'MU' => 'MU\d{2}[A-Z]{4}\d{2}\d{2}\d{12}\d{3}[A-Z]{3}', // Mauritius
'MZ' => 'MZ\d{2}\d{21}', // Mozambique
'NC' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // New Caledonia
'NL' => 'NL\d{2}[A-Z]{4}\d{10}', // The Netherlands
'NO' => 'NO\d{2}\d{4}\d{6}\d{1}', // Norway
'PF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // French Polynesia
'PK' => 'PK\d{2}[A-Z]{4}[\dA-Z]{16}', // Pakistan
'PL' => 'PL\d{2}\d{8}\d{16}', // Poland
'PM' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Saint Pierre et Miquelon
'PS' => 'PS\d{2}[A-Z]{4}[\dA-Z]{21}', // Palestine, State of
'PT' => 'PT\d{2}\d{4}\d{4}\d{11}\d{2}', // Portugal (plus Azores and Madeira)
'QA' => 'QA\d{2}[A-Z]{4}[\dA-Z]{21}', // Qatar
'RE' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Reunion
'RO' => 'RO\d{2}[A-Z]{4}[\dA-Z]{16}', // Romania
'RS' => 'RS\d{2}\d{3}\d{13}\d{2}', // Serbia
'SA' => 'SA\d{2}\d{2}[\dA-Z]{18}', // Saudi Arabia
'SE' => 'SE\d{2}\d{3}\d{16}\d{1}', // Sweden
'SI' => 'SI\d{2}\d{5}\d{8}\d{2}', // Slovenia
'SK' => 'SK\d{2}\d{4}\d{6}\d{10}', // Slovak Republic
'SM' => 'SM\d{2}[A-Z]{1}\d{5}\d{5}[\dA-Z]{12}', // San Marino
'SN' => 'SN\d{2}[A-Z]{1}\d{23}', // Senegal
'TF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // French Southern Territories
'TL' => 'TL\d{2}\d{3}\d{14}\d{2}', // Timor-Leste
'TN' => 'TN59\d{2}\d{3}\d{13}\d{2}', // Tunisia
'TR' => 'TR\d{2}\d{5}[\dA-Z]{1}[\dA-Z]{16}', // Turkey
'UA' => 'UA\d{2}\d{6}[\dA-Z]{19}', // Ukraine
'VA' => 'VA\d{2}\d{3}\d{15}', // Vatican City State
'VG' => 'VG\d{2}[A-Z]{4}\d{16}', // Virgin Islands, British
'WF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Wallis and Futuna Islands
'XK' => 'XK\d{2}\d{4}\d{10}\d{2}', // Republic of Kosovo
'YT' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Mayotte
];
/**
* {@inheritdoc}
*/
public function validate($value, Constraint $constraint)
{
if (!$constraint instanceof Iban) {
throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Iban');
}
if (null === $value || '' === $value) {
return;
}
if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
throw new UnexpectedValueException($value, 'string');
}
$value = (string) $value;
// Remove spaces and convert to uppercase
$canonicalized = str_replace(' ', '', strtoupper($value));
// The IBAN must contain only digits and characters...
if (!ctype_alnum($canonicalized)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Iban::INVALID_CHARACTERS_ERROR)
->addViolation();
return;
}
// ...start with a two-letter country code
$countryCode = substr($canonicalized, 0, 2);
if (!ctype_alpha($countryCode)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Iban::INVALID_COUNTRY_CODE_ERROR)
->addViolation();
return;
}
// ...have a format available
if (!\array_key_exists($countryCode, self::$formats)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Iban::NOT_SUPPORTED_COUNTRY_CODE_ERROR)
->addViolation();
return;
}
// ...and have a valid format
if (!preg_match('/^'.self::$formats[$countryCode].'$/', $canonicalized)
) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Iban::INVALID_FORMAT_ERROR)
->addViolation();
return;
}
// Move the first four characters to the end
// e.g. CH93 0076 2011 6238 5295 7
// -> 0076 2011 6238 5295 7 CH93
$canonicalized = substr($canonicalized, 4).substr($canonicalized, 0, 4);
// Convert all remaining letters to their ordinals
// The result is an integer, which is too large for PHP's int
// data type, so we store it in a string instead.
// e.g. 0076 2011 6238 5295 7 CH93
// -> 0076 2011 6238 5295 7 121893
$checkSum = self::toBigInt($canonicalized);
// Do a modulo-97 operation on the large integer
// We cannot use PHP's modulo operator, so we calculate the
// modulo step-wisely instead
if (1 !== self::bigModulo97($checkSum)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Iban::CHECKSUM_FAILED_ERROR)
->addViolation();
}
}
private static function toBigInt($string)
{
$chars = str_split($string);
$bigInt = '';
foreach ($chars as $char) {
// Convert uppercase characters to ordinals, starting with 10 for "A"
if (ctype_upper($char)) {
$bigInt .= (\ord($char) - 55);
continue;
}
// Simply append digits
$bigInt .= $char;
}
return $bigInt;
}
private static function bigModulo97($bigInt)
{
$parts = str_split($bigInt, 7);
$rest = 0;
foreach ($parts as $part) {
$rest = ($rest.$part) % 97;
}
return $rest;
}
}
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