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925 lines
30 KiB
925 lines
30 KiB
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com> and Trevor Rowbotham <trevor.rowbotham@pm.me>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Polyfill\Intl\Idn;
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use Exception;
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use Normalizer;
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use Symfony\Polyfill\Intl\Idn\Resources\unidata\DisallowedRanges;
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use Symfony\Polyfill\Intl\Idn\Resources\unidata\Regex;
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/**
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* @see https://www.unicode.org/reports/tr46/
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*
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* @internal
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*/
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final class Idn
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{
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public const ERROR_EMPTY_LABEL = 1;
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public const ERROR_LABEL_TOO_LONG = 2;
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public const ERROR_DOMAIN_NAME_TOO_LONG = 4;
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public const ERROR_LEADING_HYPHEN = 8;
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public const ERROR_TRAILING_HYPHEN = 0x10;
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public const ERROR_HYPHEN_3_4 = 0x20;
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public const ERROR_LEADING_COMBINING_MARK = 0x40;
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public const ERROR_DISALLOWED = 0x80;
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public const ERROR_PUNYCODE = 0x100;
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public const ERROR_LABEL_HAS_DOT = 0x200;
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public const ERROR_INVALID_ACE_LABEL = 0x400;
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public const ERROR_BIDI = 0x800;
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public const ERROR_CONTEXTJ = 0x1000;
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public const ERROR_CONTEXTO_PUNCTUATION = 0x2000;
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public const ERROR_CONTEXTO_DIGITS = 0x4000;
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public const INTL_IDNA_VARIANT_2003 = 0;
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public const INTL_IDNA_VARIANT_UTS46 = 1;
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public const IDNA_DEFAULT = 0;
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public const IDNA_ALLOW_UNASSIGNED = 1;
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public const IDNA_USE_STD3_RULES = 2;
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public const IDNA_CHECK_BIDI = 4;
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public const IDNA_CHECK_CONTEXTJ = 8;
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public const IDNA_NONTRANSITIONAL_TO_ASCII = 16;
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public const IDNA_NONTRANSITIONAL_TO_UNICODE = 32;
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public const MAX_DOMAIN_SIZE = 253;
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public const MAX_LABEL_SIZE = 63;
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public const BASE = 36;
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public const TMIN = 1;
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public const TMAX = 26;
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public const SKEW = 38;
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public const DAMP = 700;
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public const INITIAL_BIAS = 72;
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public const INITIAL_N = 128;
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public const DELIMITER = '-';
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public const MAX_INT = 2147483647;
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/**
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* Contains the numeric value of a basic code point (for use in representing integers) in the
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* range 0 to BASE-1, or -1 if b is does not represent a value.
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*
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* @var array<int, int>
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*/
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private static $basicToDigit = [
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, -1,
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-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
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15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
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-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
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15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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];
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/**
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* @var array<int, int>
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*/
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private static $virama;
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/**
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* @var array<int, string>
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*/
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private static $mapped;
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/**
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* @var array<int, bool>
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*/
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private static $ignored;
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/**
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* @var array<int, string>
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*/
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private static $deviation;
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/**
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* @var array<int, bool>
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*/
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private static $disallowed;
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/**
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* @var array<int, string>
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*/
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private static $disallowed_STD3_mapped;
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/**
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* @var array<int, bool>
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*/
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private static $disallowed_STD3_valid;
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/**
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* @var bool
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*/
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private static $mappingTableLoaded = false;
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/**
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* @see https://www.unicode.org/reports/tr46/#ToASCII
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*
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* @param string $domainName
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* @param int $options
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* @param int $variant
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* @param array $idna_info
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*
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* @return string|false
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*/
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public static function idn_to_ascii($domainName, $options = self::IDNA_DEFAULT, $variant = self::INTL_IDNA_VARIANT_UTS46, &$idna_info = [])
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{
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if (\PHP_VERSION_ID >= 70200 && self::INTL_IDNA_VARIANT_2003 === $variant) {
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@trigger_error('idn_to_ascii(): INTL_IDNA_VARIANT_2003 is deprecated', \E_USER_DEPRECATED);
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}
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$options = [
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'CheckHyphens' => true,
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'CheckBidi' => self::INTL_IDNA_VARIANT_2003 === $variant || 0 !== ($options & self::IDNA_CHECK_BIDI),
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'CheckJoiners' => self::INTL_IDNA_VARIANT_UTS46 === $variant && 0 !== ($options & self::IDNA_CHECK_CONTEXTJ),
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'UseSTD3ASCIIRules' => 0 !== ($options & self::IDNA_USE_STD3_RULES),
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'Transitional_Processing' => self::INTL_IDNA_VARIANT_2003 === $variant || 0 === ($options & self::IDNA_NONTRANSITIONAL_TO_ASCII),
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'VerifyDnsLength' => true,
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];
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$info = new Info();
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$labels = self::process((string) $domainName, $options, $info);
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foreach ($labels as $i => $label) {
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// Only convert labels to punycode that contain non-ASCII code points
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if (1 === preg_match('/[^\x00-\x7F]/', $label)) {
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try {
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$label = 'xn--'.self::punycodeEncode($label);
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} catch (Exception $e) {
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$info->errors |= self::ERROR_PUNYCODE;
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}
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$labels[$i] = $label;
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}
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}
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if ($options['VerifyDnsLength']) {
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self::validateDomainAndLabelLength($labels, $info);
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}
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$idna_info = [
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'result' => implode('.', $labels),
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'isTransitionalDifferent' => $info->transitionalDifferent,
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'errors' => $info->errors,
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];
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return 0 === $info->errors ? $idna_info['result'] : false;
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}
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/**
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* @see https://www.unicode.org/reports/tr46/#ToUnicode
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*
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* @param string $domainName
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* @param int $options
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* @param int $variant
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* @param array $idna_info
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*
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* @return string|false
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*/
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public static function idn_to_utf8($domainName, $options = self::IDNA_DEFAULT, $variant = self::INTL_IDNA_VARIANT_UTS46, &$idna_info = [])
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{
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if (\PHP_VERSION_ID >= 70200 && self::INTL_IDNA_VARIANT_2003 === $variant) {
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@trigger_error('idn_to_utf8(): INTL_IDNA_VARIANT_2003 is deprecated', \E_USER_DEPRECATED);
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}
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$info = new Info();
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$labels = self::process((string) $domainName, [
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'CheckHyphens' => true,
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'CheckBidi' => self::INTL_IDNA_VARIANT_2003 === $variant || 0 !== ($options & self::IDNA_CHECK_BIDI),
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'CheckJoiners' => self::INTL_IDNA_VARIANT_UTS46 === $variant && 0 !== ($options & self::IDNA_CHECK_CONTEXTJ),
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'UseSTD3ASCIIRules' => 0 !== ($options & self::IDNA_USE_STD3_RULES),
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'Transitional_Processing' => self::INTL_IDNA_VARIANT_2003 === $variant || 0 === ($options & self::IDNA_NONTRANSITIONAL_TO_UNICODE),
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], $info);
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$idna_info = [
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'result' => implode('.', $labels),
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'isTransitionalDifferent' => $info->transitionalDifferent,
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'errors' => $info->errors,
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];
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return 0 === $info->errors ? $idna_info['result'] : false;
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}
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/**
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* @param string $label
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*
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* @return bool
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*/
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private static function isValidContextJ(array $codePoints, $label)
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{
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if (!isset(self::$virama)) {
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self::$virama = require __DIR__.\DIRECTORY_SEPARATOR.'Resources'.\DIRECTORY_SEPARATOR.'unidata'.\DIRECTORY_SEPARATOR.'virama.php';
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}
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$offset = 0;
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foreach ($codePoints as $i => $codePoint) {
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if (0x200C !== $codePoint && 0x200D !== $codePoint) {
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continue;
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}
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if (!isset($codePoints[$i - 1])) {
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return false;
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}
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// If Canonical_Combining_Class(Before(cp)) .eq. Virama Then True;
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if (isset(self::$virama[$codePoints[$i - 1]])) {
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continue;
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}
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// If RegExpMatch((Joining_Type:{L,D})(Joining_Type:T)*\u200C(Joining_Type:T)*(Joining_Type:{R,D})) Then
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// True;
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// Generated RegExp = ([Joining_Type:{L,D}][Joining_Type:T]*\u200C[Joining_Type:T]*)[Joining_Type:{R,D}]
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if (0x200C === $codePoint && 1 === preg_match(Regex::ZWNJ, $label, $matches, \PREG_OFFSET_CAPTURE, $offset)) {
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$offset += \strlen($matches[1][0]);
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continue;
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}
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return false;
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}
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return true;
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}
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/**
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* @see https://www.unicode.org/reports/tr46/#ProcessingStepMap
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*
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* @param string $input
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* @param array<string, bool> $options
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*
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* @return string
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*/
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private static function mapCodePoints($input, array $options, Info $info)
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{
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$str = '';
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$useSTD3ASCIIRules = $options['UseSTD3ASCIIRules'];
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$transitional = $options['Transitional_Processing'];
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foreach (self::utf8Decode($input) as $codePoint) {
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$data = self::lookupCodePointStatus($codePoint, $useSTD3ASCIIRules);
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switch ($data['status']) {
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case 'disallowed':
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$info->errors |= self::ERROR_DISALLOWED;
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// no break.
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case 'valid':
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$str .= mb_chr($codePoint, 'utf-8');
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break;
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case 'ignored':
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// Do nothing.
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break;
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case 'mapped':
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$str .= $data['mapping'];
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break;
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case 'deviation':
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$info->transitionalDifferent = true;
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$str .= ($transitional ? $data['mapping'] : mb_chr($codePoint, 'utf-8'));
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break;
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}
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}
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return $str;
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}
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/**
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* @see https://www.unicode.org/reports/tr46/#Processing
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*
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* @param string $domain
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* @param array<string, bool> $options
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*
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* @return array<int, string>
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*/
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private static function process($domain, array $options, Info $info)
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{
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// If VerifyDnsLength is not set, we are doing ToUnicode otherwise we are doing ToASCII and
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// we need to respect the VerifyDnsLength option.
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$checkForEmptyLabels = !isset($options['VerifyDnsLength']) || $options['VerifyDnsLength'];
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if ($checkForEmptyLabels && '' === $domain) {
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$info->errors |= self::ERROR_EMPTY_LABEL;
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return [$domain];
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}
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// Step 1. Map each code point in the domain name string
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$domain = self::mapCodePoints($domain, $options, $info);
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// Step 2. Normalize the domain name string to Unicode Normalization Form C.
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if (!Normalizer::isNormalized($domain, Normalizer::FORM_C)) {
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$domain = Normalizer::normalize($domain, Normalizer::FORM_C);
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}
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// Step 3. Break the string into labels at U+002E (.) FULL STOP.
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$labels = explode('.', $domain);
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$lastLabelIndex = \count($labels) - 1;
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// Step 4. Convert and validate each label in the domain name string.
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foreach ($labels as $i => $label) {
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$validationOptions = $options;
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if ('xn--' === substr($label, 0, 4)) {
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try {
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$label = self::punycodeDecode(substr($label, 4));
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} catch (Exception $e) {
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$info->errors |= self::ERROR_PUNYCODE;
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continue;
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}
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$validationOptions['Transitional_Processing'] = false;
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$labels[$i] = $label;
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}
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self::validateLabel($label, $info, $validationOptions, $i > 0 && $i === $lastLabelIndex);
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}
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if ($info->bidiDomain && !$info->validBidiDomain) {
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$info->errors |= self::ERROR_BIDI;
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}
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// Any input domain name string that does not record an error has been successfully
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// processed according to this specification. Conversely, if an input domain_name string
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// causes an error, then the processing of the input domain_name string fails. Determining
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// what to do with error input is up to the caller, and not in the scope of this document.
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return $labels;
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}
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/**
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* @see https://tools.ietf.org/html/rfc5893#section-2
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*
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* @param string $label
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*/
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private static function validateBidiLabel($label, Info $info)
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{
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if (1 === preg_match(Regex::RTL_LABEL, $label)) {
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$info->bidiDomain = true;
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// Step 1. The first character must be a character with Bidi property L, R, or AL.
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// If it has the R or AL property, it is an RTL label
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if (1 !== preg_match(Regex::BIDI_STEP_1_RTL, $label)) {
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$info->validBidiDomain = false;
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return;
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}
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// Step 2. In an RTL label, only characters with the Bidi properties R, AL, AN, EN, ES,
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// CS, ET, ON, BN, or NSM are allowed.
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if (1 === preg_match(Regex::BIDI_STEP_2, $label)) {
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$info->validBidiDomain = false;
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return;
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}
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// Step 3. In an RTL label, the end of the label must be a character with Bidi property
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// R, AL, EN, or AN, followed by zero or more characters with Bidi property NSM.
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if (1 !== preg_match(Regex::BIDI_STEP_3, $label)) {
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$info->validBidiDomain = false;
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return;
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}
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// Step 4. In an RTL label, if an EN is present, no AN may be present, and vice versa.
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if (1 === preg_match(Regex::BIDI_STEP_4_AN, $label) && 1 === preg_match(Regex::BIDI_STEP_4_EN, $label)) {
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$info->validBidiDomain = false;
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return;
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}
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return;
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}
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// We are a LTR label
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// Step 1. The first character must be a character with Bidi property L, R, or AL.
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// If it has the L property, it is an LTR label.
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if (1 !== preg_match(Regex::BIDI_STEP_1_LTR, $label)) {
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$info->validBidiDomain = false;
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return;
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}
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// Step 5. In an LTR label, only characters with the Bidi properties L, EN,
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// ES, CS, ET, ON, BN, or NSM are allowed.
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if (1 === preg_match(Regex::BIDI_STEP_5, $label)) {
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$info->validBidiDomain = false;
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return;
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}
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// Step 6.In an LTR label, the end of the label must be a character with Bidi property L or
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// EN, followed by zero or more characters with Bidi property NSM.
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if (1 !== preg_match(Regex::BIDI_STEP_6, $label)) {
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$info->validBidiDomain = false;
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return;
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}
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}
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/**
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* @param array<int, string> $labels
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*/
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private static function validateDomainAndLabelLength(array $labels, Info $info)
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{
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$maxDomainSize = self::MAX_DOMAIN_SIZE;
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$length = \count($labels);
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// Number of "." delimiters.
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$domainLength = $length - 1;
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// If the last label is empty and it is not the first label, then it is the root label.
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// Increase the max size by 1, making it 254, to account for the root label's "."
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// delimiter. This also means we don't need to check the last label's length for being too
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// long.
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if ($length > 1 && '' === $labels[$length - 1]) {
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++$maxDomainSize;
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--$length;
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}
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for ($i = 0; $i < $length; ++$i) {
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$bytes = \strlen($labels[$i]);
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$domainLength += $bytes;
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if ($bytes > self::MAX_LABEL_SIZE) {
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|
$info->errors |= self::ERROR_LABEL_TOO_LONG;
|
|
}
|
|
}
|
|
|
|
if ($domainLength > $maxDomainSize) {
|
|
$info->errors |= self::ERROR_DOMAIN_NAME_TOO_LONG;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @see https://www.unicode.org/reports/tr46/#Validity_Criteria
|
|
*
|
|
* @param string $label
|
|
* @param array<string, bool> $options
|
|
* @param bool $canBeEmpty
|
|
*/
|
|
private static function validateLabel($label, Info $info, array $options, $canBeEmpty)
|
|
{
|
|
if ('' === $label) {
|
|
if (!$canBeEmpty && (!isset($options['VerifyDnsLength']) || $options['VerifyDnsLength'])) {
|
|
$info->errors |= self::ERROR_EMPTY_LABEL;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
// Step 1. The label must be in Unicode Normalization Form C.
|
|
if (!Normalizer::isNormalized($label, Normalizer::FORM_C)) {
|
|
$info->errors |= self::ERROR_INVALID_ACE_LABEL;
|
|
}
|
|
|
|
$codePoints = self::utf8Decode($label);
|
|
|
|
if ($options['CheckHyphens']) {
|
|
// Step 2. If CheckHyphens, the label must not contain a U+002D HYPHEN-MINUS character
|
|
// in both the thrid and fourth positions.
|
|
if (isset($codePoints[2], $codePoints[3]) && 0x002D === $codePoints[2] && 0x002D === $codePoints[3]) {
|
|
$info->errors |= self::ERROR_HYPHEN_3_4;
|
|
}
|
|
|
|
// Step 3. If CheckHyphens, the label must neither begin nor end with a U+002D
|
|
// HYPHEN-MINUS character.
|
|
if ('-' === substr($label, 0, 1)) {
|
|
$info->errors |= self::ERROR_LEADING_HYPHEN;
|
|
}
|
|
|
|
if ('-' === substr($label, -1, 1)) {
|
|
$info->errors |= self::ERROR_TRAILING_HYPHEN;
|
|
}
|
|
}
|
|
|
|
// Step 4. The label must not contain a U+002E (.) FULL STOP.
|
|
if (false !== strpos($label, '.')) {
|
|
$info->errors |= self::ERROR_LABEL_HAS_DOT;
|
|
}
|
|
|
|
// Step 5. The label must not begin with a combining mark, that is: General_Category=Mark.
|
|
if (1 === preg_match(Regex::COMBINING_MARK, $label)) {
|
|
$info->errors |= self::ERROR_LEADING_COMBINING_MARK;
|
|
}
|
|
|
|
// Step 6. Each code point in the label must only have certain status values according to
|
|
// Section 5, IDNA Mapping Table:
|
|
$transitional = $options['Transitional_Processing'];
|
|
$useSTD3ASCIIRules = $options['UseSTD3ASCIIRules'];
|
|
|
|
foreach ($codePoints as $codePoint) {
|
|
$data = self::lookupCodePointStatus($codePoint, $useSTD3ASCIIRules);
|
|
$status = $data['status'];
|
|
|
|
if ('valid' === $status || (!$transitional && 'deviation' === $status)) {
|
|
continue;
|
|
}
|
|
|
|
$info->errors |= self::ERROR_DISALLOWED;
|
|
|
|
break;
|
|
}
|
|
|
|
// Step 7. If CheckJoiners, the label must satisify the ContextJ rules from Appendix A, in
|
|
// The Unicode Code Points and Internationalized Domain Names for Applications (IDNA)
|
|
// [IDNA2008].
|
|
if ($options['CheckJoiners'] && !self::isValidContextJ($codePoints, $label)) {
|
|
$info->errors |= self::ERROR_CONTEXTJ;
|
|
}
|
|
|
|
// Step 8. If CheckBidi, and if the domain name is a Bidi domain name, then the label must
|
|
// satisfy all six of the numbered conditions in [IDNA2008] RFC 5893, Section 2.
|
|
if ($options['CheckBidi'] && (!$info->bidiDomain || $info->validBidiDomain)) {
|
|
self::validateBidiLabel($label, $info);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @see https://tools.ietf.org/html/rfc3492#section-6.2
|
|
*
|
|
* @param string $input
|
|
*
|
|
* @return string
|
|
*/
|
|
private static function punycodeDecode($input)
|
|
{
|
|
$n = self::INITIAL_N;
|
|
$out = 0;
|
|
$i = 0;
|
|
$bias = self::INITIAL_BIAS;
|
|
$lastDelimIndex = strrpos($input, self::DELIMITER);
|
|
$b = false === $lastDelimIndex ? 0 : $lastDelimIndex;
|
|
$inputLength = \strlen($input);
|
|
$output = [];
|
|
$bytes = array_map('ord', str_split($input));
|
|
|
|
for ($j = 0; $j < $b; ++$j) {
|
|
if ($bytes[$j] > 0x7F) {
|
|
throw new Exception('Invalid input');
|
|
}
|
|
|
|
$output[$out++] = $input[$j];
|
|
}
|
|
|
|
if ($b > 0) {
|
|
++$b;
|
|
}
|
|
|
|
for ($in = $b; $in < $inputLength; ++$out) {
|
|
$oldi = $i;
|
|
$w = 1;
|
|
|
|
for ($k = self::BASE; /* no condition */; $k += self::BASE) {
|
|
if ($in >= $inputLength) {
|
|
throw new Exception('Invalid input');
|
|
}
|
|
|
|
$digit = self::$basicToDigit[$bytes[$in++] & 0xFF];
|
|
|
|
if ($digit < 0) {
|
|
throw new Exception('Invalid input');
|
|
}
|
|
|
|
if ($digit > intdiv(self::MAX_INT - $i, $w)) {
|
|
throw new Exception('Integer overflow');
|
|
}
|
|
|
|
$i += $digit * $w;
|
|
|
|
if ($k <= $bias) {
|
|
$t = self::TMIN;
|
|
} elseif ($k >= $bias + self::TMAX) {
|
|
$t = self::TMAX;
|
|
} else {
|
|
$t = $k - $bias;
|
|
}
|
|
|
|
if ($digit < $t) {
|
|
break;
|
|
}
|
|
|
|
$baseMinusT = self::BASE - $t;
|
|
|
|
if ($w > intdiv(self::MAX_INT, $baseMinusT)) {
|
|
throw new Exception('Integer overflow');
|
|
}
|
|
|
|
$w *= $baseMinusT;
|
|
}
|
|
|
|
$outPlusOne = $out + 1;
|
|
$bias = self::adaptBias($i - $oldi, $outPlusOne, 0 === $oldi);
|
|
|
|
if (intdiv($i, $outPlusOne) > self::MAX_INT - $n) {
|
|
throw new Exception('Integer overflow');
|
|
}
|
|
|
|
$n += intdiv($i, $outPlusOne);
|
|
$i %= $outPlusOne;
|
|
array_splice($output, $i++, 0, [mb_chr($n, 'utf-8')]);
|
|
}
|
|
|
|
return implode('', $output);
|
|
}
|
|
|
|
/**
|
|
* @see https://tools.ietf.org/html/rfc3492#section-6.3
|
|
*
|
|
* @param string $input
|
|
*
|
|
* @return string
|
|
*/
|
|
private static function punycodeEncode($input)
|
|
{
|
|
$n = self::INITIAL_N;
|
|
$delta = 0;
|
|
$out = 0;
|
|
$bias = self::INITIAL_BIAS;
|
|
$inputLength = 0;
|
|
$output = '';
|
|
$iter = self::utf8Decode($input);
|
|
|
|
foreach ($iter as $codePoint) {
|
|
++$inputLength;
|
|
|
|
if ($codePoint < 0x80) {
|
|
$output .= \chr($codePoint);
|
|
++$out;
|
|
}
|
|
}
|
|
|
|
$h = $out;
|
|
$b = $out;
|
|
|
|
if ($b > 0) {
|
|
$output .= self::DELIMITER;
|
|
++$out;
|
|
}
|
|
|
|
while ($h < $inputLength) {
|
|
$m = self::MAX_INT;
|
|
|
|
foreach ($iter as $codePoint) {
|
|
if ($codePoint >= $n && $codePoint < $m) {
|
|
$m = $codePoint;
|
|
}
|
|
}
|
|
|
|
if ($m - $n > intdiv(self::MAX_INT - $delta, $h + 1)) {
|
|
throw new Exception('Integer overflow');
|
|
}
|
|
|
|
$delta += ($m - $n) * ($h + 1);
|
|
$n = $m;
|
|
|
|
foreach ($iter as $codePoint) {
|
|
if ($codePoint < $n && 0 === ++$delta) {
|
|
throw new Exception('Integer overflow');
|
|
}
|
|
|
|
if ($codePoint === $n) {
|
|
$q = $delta;
|
|
|
|
for ($k = self::BASE; /* no condition */; $k += self::BASE) {
|
|
if ($k <= $bias) {
|
|
$t = self::TMIN;
|
|
} elseif ($k >= $bias + self::TMAX) {
|
|
$t = self::TMAX;
|
|
} else {
|
|
$t = $k - $bias;
|
|
}
|
|
|
|
if ($q < $t) {
|
|
break;
|
|
}
|
|
|
|
$qMinusT = $q - $t;
|
|
$baseMinusT = self::BASE - $t;
|
|
$output .= self::encodeDigit($t + ($qMinusT) % ($baseMinusT), false);
|
|
++$out;
|
|
$q = intdiv($qMinusT, $baseMinusT);
|
|
}
|
|
|
|
$output .= self::encodeDigit($q, false);
|
|
++$out;
|
|
$bias = self::adaptBias($delta, $h + 1, $h === $b);
|
|
$delta = 0;
|
|
++$h;
|
|
}
|
|
}
|
|
|
|
++$delta;
|
|
++$n;
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* @see https://tools.ietf.org/html/rfc3492#section-6.1
|
|
*
|
|
* @param int $delta
|
|
* @param int $numPoints
|
|
* @param bool $firstTime
|
|
*
|
|
* @return int
|
|
*/
|
|
private static function adaptBias($delta, $numPoints, $firstTime)
|
|
{
|
|
// xxx >> 1 is a faster way of doing intdiv(xxx, 2)
|
|
$delta = $firstTime ? intdiv($delta, self::DAMP) : $delta >> 1;
|
|
$delta += intdiv($delta, $numPoints);
|
|
$k = 0;
|
|
|
|
while ($delta > ((self::BASE - self::TMIN) * self::TMAX) >> 1) {
|
|
$delta = intdiv($delta, self::BASE - self::TMIN);
|
|
$k += self::BASE;
|
|
}
|
|
|
|
return $k + intdiv((self::BASE - self::TMIN + 1) * $delta, $delta + self::SKEW);
|
|
}
|
|
|
|
/**
|
|
* @param int $d
|
|
* @param bool $flag
|
|
*
|
|
* @return string
|
|
*/
|
|
private static function encodeDigit($d, $flag)
|
|
{
|
|
return \chr($d + 22 + 75 * ($d < 26 ? 1 : 0) - (($flag ? 1 : 0) << 5));
|
|
}
|
|
|
|
/**
|
|
* Takes a UTF-8 encoded string and converts it into a series of integer code points. Any
|
|
* invalid byte sequences will be replaced by a U+FFFD replacement code point.
|
|
*
|
|
* @see https://encoding.spec.whatwg.org/#utf-8-decoder
|
|
*
|
|
* @param string $input
|
|
*
|
|
* @return array<int, int>
|
|
*/
|
|
private static function utf8Decode($input)
|
|
{
|
|
$bytesSeen = 0;
|
|
$bytesNeeded = 0;
|
|
$lowerBoundary = 0x80;
|
|
$upperBoundary = 0xBF;
|
|
$codePoint = 0;
|
|
$codePoints = [];
|
|
$length = \strlen($input);
|
|
|
|
for ($i = 0; $i < $length; ++$i) {
|
|
$byte = \ord($input[$i]);
|
|
|
|
if (0 === $bytesNeeded) {
|
|
if ($byte >= 0x00 && $byte <= 0x7F) {
|
|
$codePoints[] = $byte;
|
|
|
|
continue;
|
|
}
|
|
|
|
if ($byte >= 0xC2 && $byte <= 0xDF) {
|
|
$bytesNeeded = 1;
|
|
$codePoint = $byte & 0x1F;
|
|
} elseif ($byte >= 0xE0 && $byte <= 0xEF) {
|
|
if (0xE0 === $byte) {
|
|
$lowerBoundary = 0xA0;
|
|
} elseif (0xED === $byte) {
|
|
$upperBoundary = 0x9F;
|
|
}
|
|
|
|
$bytesNeeded = 2;
|
|
$codePoint = $byte & 0xF;
|
|
} elseif ($byte >= 0xF0 && $byte <= 0xF4) {
|
|
if (0xF0 === $byte) {
|
|
$lowerBoundary = 0x90;
|
|
} elseif (0xF4 === $byte) {
|
|
$upperBoundary = 0x8F;
|
|
}
|
|
|
|
$bytesNeeded = 3;
|
|
$codePoint = $byte & 0x7;
|
|
} else {
|
|
$codePoints[] = 0xFFFD;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if ($byte < $lowerBoundary || $byte > $upperBoundary) {
|
|
$codePoint = 0;
|
|
$bytesNeeded = 0;
|
|
$bytesSeen = 0;
|
|
$lowerBoundary = 0x80;
|
|
$upperBoundary = 0xBF;
|
|
--$i;
|
|
$codePoints[] = 0xFFFD;
|
|
|
|
continue;
|
|
}
|
|
|
|
$lowerBoundary = 0x80;
|
|
$upperBoundary = 0xBF;
|
|
$codePoint = ($codePoint << 6) | ($byte & 0x3F);
|
|
|
|
if (++$bytesSeen !== $bytesNeeded) {
|
|
continue;
|
|
}
|
|
|
|
$codePoints[] = $codePoint;
|
|
$codePoint = 0;
|
|
$bytesNeeded = 0;
|
|
$bytesSeen = 0;
|
|
}
|
|
|
|
// String unexpectedly ended, so append a U+FFFD code point.
|
|
if (0 !== $bytesNeeded) {
|
|
$codePoints[] = 0xFFFD;
|
|
}
|
|
|
|
return $codePoints;
|
|
}
|
|
|
|
/**
|
|
* @param int $codePoint
|
|
* @param bool $useSTD3ASCIIRules
|
|
*
|
|
* @return array{status: string, mapping?: string}
|
|
*/
|
|
private static function lookupCodePointStatus($codePoint, $useSTD3ASCIIRules)
|
|
{
|
|
if (!self::$mappingTableLoaded) {
|
|
self::$mappingTableLoaded = true;
|
|
self::$mapped = require __DIR__.'/Resources/unidata/mapped.php';
|
|
self::$ignored = require __DIR__.'/Resources/unidata/ignored.php';
|
|
self::$deviation = require __DIR__.'/Resources/unidata/deviation.php';
|
|
self::$disallowed = require __DIR__.'/Resources/unidata/disallowed.php';
|
|
self::$disallowed_STD3_mapped = require __DIR__.'/Resources/unidata/disallowed_STD3_mapped.php';
|
|
self::$disallowed_STD3_valid = require __DIR__.'/Resources/unidata/disallowed_STD3_valid.php';
|
|
}
|
|
|
|
if (isset(self::$mapped[$codePoint])) {
|
|
return ['status' => 'mapped', 'mapping' => self::$mapped[$codePoint]];
|
|
}
|
|
|
|
if (isset(self::$ignored[$codePoint])) {
|
|
return ['status' => 'ignored'];
|
|
}
|
|
|
|
if (isset(self::$deviation[$codePoint])) {
|
|
return ['status' => 'deviation', 'mapping' => self::$deviation[$codePoint]];
|
|
}
|
|
|
|
if (isset(self::$disallowed[$codePoint]) || DisallowedRanges::inRange($codePoint)) {
|
|
return ['status' => 'disallowed'];
|
|
}
|
|
|
|
$isDisallowedMapped = isset(self::$disallowed_STD3_mapped[$codePoint]);
|
|
|
|
if ($isDisallowedMapped || isset(self::$disallowed_STD3_valid[$codePoint])) {
|
|
$status = 'disallowed';
|
|
|
|
if (!$useSTD3ASCIIRules) {
|
|
$status = $isDisallowedMapped ? 'mapped' : 'valid';
|
|
}
|
|
|
|
if ($isDisallowedMapped) {
|
|
return ['status' => $status, 'mapping' => self::$disallowed_STD3_mapped[$codePoint]];
|
|
}
|
|
|
|
return ['status' => $status];
|
|
}
|
|
|
|
return ['status' => 'valid'];
|
|
}
|
|
}
|
|
|