bug symfony#48998 [Validator] Sync IBAN formats with Swift IBAN registry (smelesh)

nicolas-grekas · nicolas-grekas · commit 0955438a9195 · 2023-02-22T14:44:30.000+01:00
This PR was merged into the 5.4 branch. Discussion ---------- [Validator] Sync IBAN formats with Swift IBAN registry | Q | A | ------------- | --- | Branch? | 5.4 | Bug fix? | yes | New feature? | no | Deprecations? | no | Tickets | n/a | License | MIT | Doc PR | n/a Gathered IBAN formats from [IBAN Registry provided by SWIFT](https://www.swift.com/standards/data-standards/iban-international-bank-account-number). Some countries don't exist in the registry (Angola, Burkina Faso, Benin, Congo, Ivory Coast, Cameron, Cape Verde, Algeria, Iran, Madagascar, Mali, Mozambique, Senegal). I can't verify the format, but they are marked experimental here: https://www.iban.com/structure Some formats were changed (Burundi, Costa Rica, Kuwait, Turkey). Is it a BC break? Commits ------- d4e3047 [Validator] Sync IBAN formats with Swift IBAN registry
diff --git a/src/Symfony/Component/Validator/.gitattributes b/src/Symfony/Component/Validator/.gitattributes
@@ -2,3 +2,4 @@
 /phpunit.xml.dist export-ignore
 /.gitattributes export-ignore
 /.gitignore export-ignore
+/Resources/bin/sync-iban-formats.php export-ignore
diff --git a/src/Symfony/Component/Validator/Constraints/IbanValidator.php b/src/Symfony/Component/Validator/Constraints/IbanValidator.php
@@ -20,8 +20,6 @@
  * @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
 {
@@ -34,107 +32,135 @@ class IbanValidator extends ConstraintValidator
      * 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
+     * @see Resources/bin/sync-iban-formats.php
+     * @see https://www.swift.com/swift-resource/11971/download?language=en
+     * @see https://en.wikipedia.org/wiki/International_Bank_Account_Number
      */
     private const FORMATS = [
+        // auto-generated
         'AD' => 'AD\d{2}\d{4}\d{4}[\dA-Z]{12}', // Andorra
-        'AE' => 'AE\d{2}\d{3}\d{16}', // United Arab Emirates
+        'AE' => 'AE\d{2}\d{3}\d{16}', // United Arab Emirates (The)
         '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
+        'AX' => 'FI\d{2}\d{3}\d{11}', // Finland
         '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
+        'BF' => 'BF\d{2}[\dA-Z]{2}\d{22}', // 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
+        'BI' => 'BI\d{2}\d{5}\d{5}\d{11}\d{2}', // Burundi
+        'BJ' => 'BJ\d{2}[\dA-Z]{2}\d{22}', // Benin
+        'BL' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
+        'BR' => 'BR\d{2}\d{8}\d{5}\d{10}[A-Z]{1}[\dA-Z]{1}', // Brazil
+        'BY' => 'BY\d{2}[\dA-Z]{4}\d{4}[\dA-Z]{16}', // Republic of Belarus
+        'CF' => 'CF\d{2}\d{23}', // Central African Republic
+        'CG' => 'CG\d{2}\d{23}', // Congo, Republic of the
         '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
+        'CI' => 'CI\d{2}[A-Z]{1}\d{23}', // Côte d'Ivoire
+        'CM' => 'CM\d{2}\d{23}', // Cameroon
+        'CR' => 'CR\d{2}\d{4}\d{14}', // Costa Rica
+        'CV' => 'CV\d{2}\d{21}', // Cabo Verde
         'CY' => 'CY\d{2}\d{3}\d{5}[\dA-Z]{16}', // Cyprus
-        'CZ' => 'CZ\d{2}\d{20}', // Czech Republic
+        'CZ' => 'CZ\d{2}\d{4}\d{6}\d{10}', // Czechia
         'DE' => 'DE\d{2}\d{8}\d{10}', // Germany
+        'DJ' => 'DJ\d{2}\d{5}\d{5}\d{11}\d{2}', // Djibouti
+        'DK' => 'DK\d{2}\d{4}\d{9}\d{1}', // Denmark
         '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
+        'DZ' => 'DZ\d{2}\d{22}', // 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
+        'EG' => 'EG\d{2}\d{4}\d{4}\d{17}', // Egypt
+        'ES' => 'ES\d{2}\d{4}\d{4}\d{1}\d{1}\d{10}', // Spain
+        'FI' => 'FI\d{2}\d{3}\d{11}', // 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
+        'GA' => 'GA\d{2}\d{23}', // Gabon
+        'GB' => 'GB\d{2}[A-Z]{4}\d{6}\d{8}', // United Kingdom
         'GE' => 'GE\d{2}[A-Z]{2}\d{16}', // Georgia
+        'GF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
+        'GG' => 'GB\d{2}[A-Z]{4}\d{6}\d{8}', // United Kingdom
         '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
+        'GP' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
+        'GQ' => 'GQ\d{2}\d{23}', // Equatorial Guinea
         'GR' => 'GR\d{2}\d{3}\d{4}[\dA-Z]{16}', // Greece
         'GT' => 'GT\d{2}[\dA-Z]{4}[\dA-Z]{20}', // Guatemala
+        'GW' => 'GW\d{2}[\dA-Z]{2}\d{19}', // Guinea-Bissau
+        'HN' => 'HN\d{2}[A-Z]{4}\d{20}', // Honduras
         '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
+        'IM' => 'GB\d{2}[A-Z]{4}\d{6}\d{8}', // United Kingdom
+        'IQ' => 'IQ\d{2}[A-Z]{4}\d{3}\d{12}', // Iraq
         '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
+        'JE' => 'GB\d{2}[A-Z]{4}\d{6}\d{8}', // United Kingdom
         'JO' => 'JO\d{2}[A-Z]{4}\d{4}[\dA-Z]{18}', // Jordan
-        'KW' => 'KW\d{2}[A-Z]{4}\d{22}', // KUWAIT
+        'KM' => 'KM\d{2}\d{23}', // Comoros
+        'KW' => 'KW\d{2}[A-Z]{4}[\dA-Z]{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)
+        'LB' => 'LB\d{2}\d{4}[\dA-Z]{20}', // Lebanon
+        'LC' => 'LC\d{2}[A-Z]{4}[\dA-Z]{24}', // Saint Lucia
+        'LI' => 'LI\d{2}\d{5}[\dA-Z]{12}', // Liechtenstein
         '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
+        'LY' => 'LY\d{2}\d{3}\d{3}\d{15}', // Libya
+        'MA' => 'MA\d{2}\d{24}', // Morocco
         '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)
+        'MF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
         '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
+        'MK' => 'MK\d{2}\d{3}[\dA-Z]{10}\d{2}', // Macedonia
+        'ML' => 'ML\d{2}[\dA-Z]{2}\d{22}', // Mali
+        'MQ' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
         'MR' => 'MR\d{2}\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
+        'NC' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
+        'NE' => 'NE\d{2}[A-Z]{2}\d{22}', // Niger
+        'NI' => 'NI\d{2}[A-Z]{4}\d{24}', // Nicaragua
+        'NL' => 'NL\d{2}[A-Z]{4}\d{10}', // Netherlands (The)
         '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
+        'PF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
         '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
+        'PM' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
         '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)
+        'PT' => 'PT\d{2}\d{4}\d{4}\d{11}\d{2}', // Portugal
         '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
+        'RE' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
         'RO' => 'RO\d{2}[A-Z]{4}[\dA-Z]{16}', // Romania
         'RS' => 'RS\d{2}\d{3}\d{13}\d{2}', // Serbia
+        'RU' => 'RU\d{2}\d{9}\d{5}[\dA-Z]{15}', // Russia
         'SA' => 'SA\d{2}\d{2}[\dA-Z]{18}', // Saudi Arabia
+        'SC' => 'SC\d{2}[A-Z]{4}\d{2}\d{2}\d{16}[A-Z]{3}', // Seychelles
+        'SD' => 'SD\d{2}\d{2}\d{12}', // Sudan
         '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
+        'SK' => 'SK\d{2}\d{4}\d{6}\d{10}', // Slovakia
         '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
+        'SN' => 'SN\d{2}[A-Z]{2}\d{22}', // Senegal
+        'SO' => 'SO\d{2}\d{4}\d{3}\d{12}', // Somalia
+        'ST' => 'ST\d{2}\d{4}\d{4}\d{11}\d{2}', // Sao Tome and Principe
+        'SV' => 'SV\d{2}[A-Z]{4}\d{20}', // El Salvador
+        'TD' => 'TD\d{2}\d{23}', // Chad
+        'TF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
+        'TG' => 'TG\d{2}[A-Z]{2}\d{22}', // Togo
         'TL' => 'TL\d{2}\d{3}\d{14}\d{2}', // Timor-Leste
         'TN' => 'TN\d{2}\d{2}\d{3}\d{13}\d{2}', // Tunisia
-        'TR' => 'TR\d{2}\d{5}[\dA-Z]{1}[\dA-Z]{16}', // Turkey
+        'TR' => 'TR\d{2}\d{5}\d{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
+        'VG' => 'VG\d{2}[A-Z]{4}\d{16}', // Virgin Islands
+        'WF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
+        'XK' => 'XK\d{2}\d{4}\d{10}\d{2}', // Kosovo
+        'YT' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // France
     ];
 
     /**
diff --git a/src/Symfony/Component/Validator/Resources/bin/sync-iban-formats.php b/src/Symfony/Component/Validator/Resources/bin/sync-iban-formats.php
@@ -0,0 +1,204 @@
+#!/usr/bin/env php
+<?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.
+ */
+
+if ('cli' !== \PHP_SAPI) {
+    throw new \Exception('This script must be run from the command line.');
+}
+
+/*
+ * This script syncs IBAN formats from the upstream and updates them into IbanValidator.
+ *
+ * Usage:
+ *   php Resources/bin/sync-iban-formats.php
+ */
+
+error_reporting(\E_ALL);
+
+set_error_handler(static function (int $type, string $msg, string $file, int $line): void {
+    throw new \ErrorException($msg, 0, $type, $file, $line);
+});
+
+echo "Collecting IBAN formats...\n";
+
+$formats = array_merge(
+    (new UncyclopediaIbanProvider())->getIbanFormats(),
+    (new SwiftRegistryIbanProvider())->getIbanFormats()
+);
+
+printf("Collected %d IBAN formats\n", count($formats));
+
+echo "Updating validator...\n";
+
+updateValidatorFormats(__DIR__.'/../../Constraints/IbanValidator.php', $formats);
+
+echo "Done.\n";
+
+exit(0);
+
+function updateValidatorFormats(string $validatorPath, array $formats): void
+{
+    ksort($formats);
+
+    $formatsContent = "[\n";
+    $formatsContent .= "        // auto-generated\n";
+
+    foreach ($formats as $countryCode => [$format, $country]) {
+        $formatsContent .= "        '{$countryCode}' => '{$format}', // {$country}\n";
+    }
+
+    $formatsContent .= '    ]';
+
+    $validatorContent = file_get_contents($validatorPath);
+
+    $validatorContent = preg_replace(
+        '/FORMATS = \[.*?\];/s',
+        "FORMATS = {$formatsContent};",
+        $validatorContent
+    );
+
+    file_put_contents($validatorPath, $validatorContent);
+}
+
+final class SwiftRegistryIbanProvider
+{
+    /**
+     * @return array<string, array{string, string}>
+     */
+    public function getIbanFormats(): array
+    {
+        $items = $this->readPropertiesFromRegistry([
+            'Name of country' => 'country',
+            'IBAN prefix country code (ISO 3166)' => 'country_code',
+            'IBAN structure' => 'iban_structure',
+            'Country code includes other countries/territories' => 'included_country_codes',
+        ]);
+
+        $formats = [];
+
+        foreach ($items as $item) {
+            $formats[$item['country_code']] = [$this->buildIbanRegexp($item['iban_structure']), $item['country']];
+
+            foreach ($this->parseCountryCodesList($item['included_country_codes']) as $includedCountryCode) {
+                $formats[$includedCountryCode] = $formats[$item['country_code']];
+            }
+        }
+
+        return $formats;
+    }
+
+    /**
+     * @return list<string>
+     */
+    private function parseCountryCodesList(string $countryCodesList): array
+    {
+        if ('N/A' === $countryCodesList) {
+            return [];
+        }
+
+        $countryCodes = [];
+
+        foreach (explode(',', $countryCodesList) as $countryCode) {
+            $countryCodes[] = preg_replace('/^([A-Z]{2})(\s+\(.+?\))?$/', '$1', trim($countryCode));
+        }
+
+        return $countryCodes;
+    }
+
+    /**
+     * @param array<string, string> $properties
+     *
+     * @return list<array<string, string>>
+     */
+    private function readPropertiesFromRegistry(array $properties): array
+    {
+        $items = [];
+
+        $registryContent = file_get_contents('https://www.swift.com/swift-resource/11971/download');
+        $lines = explode("\n", $registryContent);
+
+        // skip header line
+        array_shift($lines);
+
+        foreach ($lines as $line) {
+            $columns = str_getcsv($line, "\t");
+            $propertyLabel = array_shift($columns);
+
+            if (!isset($properties[$propertyLabel])) {
+                continue;
+            }
+
+            $propertyField = $properties[$propertyLabel];
+
+            foreach ($columns as $index => $value) {
+                $items[$index][$propertyField] = $value;
+            }
+        }
+
+        return array_values($items);
+    }
+
+    private function buildIbanRegexp(string $ibanStructure): string
+    {
+        $pattern = $ibanStructure;
+
+        $pattern = preg_replace('/(\d+)!n/', '\\d{$1}', $pattern);
+        $pattern = preg_replace('/(\d+)!a/', '[A-Z]{$1}', $pattern);
+        $pattern = preg_replace('/(\d+)!c/', '[\\dA-Z]{$1}', $pattern);
+
+        return $pattern;
+    }
+}
+
+final class UncyclopediaIbanProvider
+{
+    /**
+     * @return array<string, array{string, string}>
+     */
+    public function getIbanFormats(): array
+    {
+        $formats = [];
+
+        foreach ($this->readIbanFormatsTable() as $item) {
+            if (!preg_match('/^([A-Z]{2})/', $item['Example'], $matches)) {
+                continue;
+            }
+
+            $countryCode = $matches[1];
+
+            $formats[$countryCode] = [$this->buildIbanRegexp($countryCode, $item['BBAN Format']), $item['Country']];
+        }
+
+        return $formats;
+    }
+
+    /**
+     * @return list<array<string, string|int>>
+     */
+    private function readIbanFormatsTable(): array
+    {
+        $tablesResponse = file_get_contents('https://www.wikitable2json.com/api/International_Bank_Account_Number?table=3&keyRows=1&clearRef=true');
+
+        return json_decode($tablesResponse, true, 512, JSON_THROW_ON_ERROR)[0];
+    }
+
+    private function buildIbanRegexp(string $countryCode, string $bbanFormat): string
+    {
+        $pattern = $bbanFormat;
+
+        $pattern = preg_replace('/\s*,\s*/', '', $pattern);
+        $pattern = preg_replace('/(\d+)n/', '\\d{$1}', $pattern);
+        $pattern = preg_replace('/(\d+)a/', '[A-Z]{$1}', $pattern);
+        $pattern = preg_replace('/(\d+)c/', '[\\dA-Z]{$1}', $pattern);
+
+        return $countryCode.'\\d{2}'.$pattern;
+    }
+}
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IbanValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IbanValidatorTest.php
