Current Path : C:/xampp/htdocs/moodle/lib/horde/framework/Horde/Idna/ |
Current File : C:/xampp/htdocs/moodle/lib/horde/framework/Horde/Idna/Punycode.php |
<?php /** * Copyright 2014 TrueServer B.V. * Copyright 2015-2017 Horde LLC (http://www.horde.org/) * * See the enclosed file LICENSE for license information (BSD). If you * did not receive this file, see http://www.horde.org/licenses/bsd. * * @author Renan Gonçalves <renan.saddam@gmail.com> * @author Michael Slusarz <slusarz@horde.org> * @category Horde * @license http://www.horde.org/licenses/bsd BSD * @package Idna */ /** * Punycode implementation as described in RFC 3492. * * Original code (v1.0.1; released under the MIT License): * https://github.com/true/php-punycode/ * * @author Renan Gonçalves <renan.saddam@gmail.com> * @author Michael Slusarz <slusarz@horde.org> * @category Horde * @copyright 2014 TrueServer B.V. * @copyright 2015-2017 Horde LLC * @license http://www.horde.org/licenses/bsd BSD * @package Idna * @link http://tools.ietf.org/html/rfc3492 */ class Horde_Idna_Punycode { /** * Bootstring parameter values. */ const BASE = 36; const TMIN = 1; const TMAX = 26; const SKEW = 38; const DAMP = 700; const INITIAL_BIAS = 72; const INITIAL_N = 128; const PREFIX = 'xn--'; const DELIMITER = '-'; /** * Encode table. * * @param array */ protected static $_encodeTable = array( 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ); /** * Decode table. * * @param array */ protected static $_decodeTable = array( 'a' => 0, 'b' => 1, 'c' => 2, 'd' => 3, 'e' => 4, 'f' => 5, 'g' => 6, 'h' => 7, 'i' => 8, 'j' => 9, 'k' => 10, 'l' => 11, 'm' => 12, 'n' => 13, 'o' => 14, 'p' => 15, 'q' => 16, 'r' => 17, 's' => 18, 't' => 19, 'u' => 20, 'v' => 21, 'w' => 22, 'x' => 23, 'y' => 24, 'z' => 25, '0' => 26, '1' => 27, '2' => 28, '3' => 29, '4' => 30, '5' => 31, '6' => 32, '7' => 33, '8' => 34, '9' => 35 ); /** * Encode a domain to its Punycode version. * * @param string $input Domain name in Unicde to be encoded. * * @return string Punycode representation in ASCII. */ public function encode($input) { $parts = explode('.', $input); foreach ($parts as &$part) { $part = $this->_encodePart($part); } return implode('.', $parts); } /** * Encode a part of a domain name, such as tld, to its Punycode version. * * @param string $input Part of a domain name. * * @return string Punycode representation of a domain part. */ protected function _encodePart($input) { $codePoints = $this->_codePoints($input); $n = static::INITIAL_N; $bias = static::INITIAL_BIAS; $delta = 0; $h = $b = count($codePoints['basic']); $output = ''; foreach ($codePoints['basic'] as $code) { $output .= $this->_codePointToChar($code); } if ($input === $output) { return $output; } if ($b > 0) { $output .= static::DELIMITER; } $codePoints['nonBasic'] = array_unique($codePoints['nonBasic']); sort($codePoints['nonBasic']); $i = 0; $length = Horde_String::length($input, 'UTF-8'); while ($h < $length) { $m = $codePoints['nonBasic'][$i++]; $delta = $delta + ($m - $n) * ($h + 1); $n = $m; foreach ($codePoints['all'] as $c) { if (($c < $n) || ($c < static::INITIAL_N)) { ++$delta; } if ($c === $n) { $q = $delta; for ($k = static::BASE; ; $k += static::BASE) { $t = $this->_calculateThreshold($k, $bias); if ($q < $t) { break; } $code = $t + (($q - $t) % (static::BASE - $t)); $output .= static::$_encodeTable[$code]; $q = ($q - $t) / (static::BASE - $t); } $output .= static::$_encodeTable[$q]; $bias = $this->_adapt($delta, $h + 1, ($h === $b)); $delta = 0; ++$h; } } ++$delta; ++$n; } return static::PREFIX . $output; } /** * Decode a Punycode domain name to its Unicode counterpart. * * @param string $input Domain name in Punycode * * @return string Unicode domain name. */ public function decode($input) { $parts = explode('.', $input); foreach ($parts as &$part) { if (strpos($part, static::PREFIX) === 0) { $part = $this->_decodePart( substr($part, strlen(static::PREFIX)) ); } } return implode('.', $parts); } /** * Decode a part of domain name, such as tld. * * @param string $input Part of a domain name. * * @return string Unicode domain part. */ protected function _decodePart($input) { $n = static::INITIAL_N; $i = 0; $bias = static::INITIAL_BIAS; $output = ''; $pos = strrpos($input, static::DELIMITER); if ($pos !== false) { $output = substr($input, 0, $pos++); } else { $pos = 0; } $outputLength = strlen($output); $inputLength = strlen($input); /* Punycode lookup is case-insensitive. */ $input = Horde_String::lower($input); while ($pos < $inputLength) { $oldi = $i; $w = 1; for ($k = static::BASE; ; $k += static::BASE) { $digit = static::$_decodeTable[$input[$pos++]]; $i = $i + ($digit * $w); $t = $this->_calculateThreshold($k, $bias); if ($digit < $t) { break; } $w = $w * (static::BASE - $t); } $bias = $this->_adapt($i - $oldi, ++$outputLength, ($oldi === 0)); $n = $n + (int) ($i / $outputLength); $i = $i % ($outputLength); $output = Horde_String::substr($output, 0, $i, 'UTF-8') . $this->_codePointToChar($n) . Horde_String::substr($output, $i, $outputLength - 1, 'UTF-8'); ++$i; } return $output; } /** * Calculate the bias threshold to fall between TMIN and TMAX. * * @param integer $k * @param integer $bias * * @return integer */ protected function _calculateThreshold($k, $bias) { if ($k <= ($bias + static::TMIN)) { return static::TMIN; } elseif ($k >= ($bias + static::TMAX)) { return static::TMAX; } return $k - $bias; } /** * Bias adaptation. * * @param integer $delta * @param integer $numPoints * @param boolean $firstTime * * @return integer */ protected function _adapt($delta, $numPoints, $firstTime) { $delta = (int) ( ($firstTime) ? $delta / static::DAMP : $delta / 2 ); $delta += (int) ($delta / $numPoints); $k = 0; while ($delta > ((static::BASE - static::TMIN) * static::TMAX) / 2) { $delta = (int) ($delta / (static::BASE - static::TMIN)); $k = $k + static::BASE; } $k = $k + (int) (((static::BASE - static::TMIN + 1) * $delta) / ($delta + static::SKEW)); return $k; } /** * List code points for a given input. * * @param string $input * * @return array Multi-dimension array with basic, non-basic and * aggregated code points. */ protected function _codePoints($input) { $codePoints = array( 'all' => array(), 'basic' => array(), 'nonBasic' => array() ); $len = Horde_String::length($input, 'UTF-8'); for ($i = 0; $i < $len; ++$i) { $char = Horde_String::substr($input, $i, 1, 'UTF-8'); $code = $this->_charToCodePoint($char); if ($code < 128) { $codePoints['all'][] = $codePoints['basic'][] = $code; } else { $codePoints['all'][] = $codePoints['nonBasic'][] = $code; } } return $codePoints; } /** * Convert a single or multi-byte character to its code point. * * @param string $char * * @return integer */ protected function _charToCodePoint($char) { $code = ord($char[0]); if ($code < 128) { return $code; } elseif ($code < 224) { return (($code - 192) * 64) + (ord($char[1]) - 128); } elseif ($code < 240) { return (($code - 224) * 4096) + ((ord($char[1]) - 128) * 64) + (ord($char[2]) - 128); } return (($code - 240) * 262144) + ((ord($char[1]) - 128) * 4096) + ((ord($char[2]) - 128) * 64) + (ord($char[3]) - 128); } /** * Convert a code point to its single or multi-byte character * * @param integer $code * * @return string */ protected function _codePointToChar($code) { if ($code <= 0x7F) { return chr($code); } elseif ($code <= 0x7FF) { return chr(($code >> 6) + 192) . chr(($code & 63) + 128); } elseif ($code <= 0xFFFF) { return chr(($code >> 12) + 224) . chr((($code >> 6) & 63) + 128) . chr(($code & 63) + 128); } return chr(($code >> 18) + 240) . chr((($code >> 12) & 63) + 128) . chr((($code >> 6) & 63) + 128) . chr(($code & 63) + 128); } }