home/laciafrdyl/www/wp-includes/interactivity-api/cgi-bin/IdnaEncoder.php000064400000030223151541530100022520 0ustar00 0) { if ($position + $length > $strlen) { throw new Exception('Invalid Unicode codepoint', 'idna.invalidcodepoint', $character); } for ($position++; $remaining > 0; $position++) { $value = ord($input[$position]); // If it is invalid, count the sequence as invalid and reprocess the current byte: if (($value & 0xC0) !== 0x80) { throw new Exception('Invalid Unicode codepoint', 'idna.invalidcodepoint', $character); } --$remaining; $character |= ($value & 0x3F) << ($remaining * 6); } $position--; } if (// Non-shortest form sequences are invalid $length > 1 && $character <= 0x7F || $length > 2 && $character <= 0x7FF || $length > 3 && $character <= 0xFFFF // Outside of range of ucschar codepoints // Noncharacters || ($character & 0xFFFE) === 0xFFFE || $character >= 0xFDD0 && $character <= 0xFDEF || ( // Everything else not in ucschar $character > 0xD7FF && $character < 0xF900 || $character < 0x20 || $character > 0x7E && $character < 0xA0 || $character > 0xEFFFD ) ) { throw new Exception('Invalid Unicode codepoint', 'idna.invalidcodepoint', $character); } $codepoints[] = $character; } return $codepoints; } /** * RFC3492-compliant encoder * * @internal Pseudo-code from Section 6.3 is commented with "#" next to relevant code * * @param string $input UTF-8 encoded string to encode * @return string Punycode-encoded string * * @throws \WpOrg\Requests\Exception On character outside of the domain (never happens with Punycode) (`idna.character_outside_domain`) */ public static function punycode_encode($input) { $output = ''; // let n = initial_n $n = self::BOOTSTRAP_INITIAL_N; // let delta = 0 $delta = 0; // let bias = initial_bias $bias = self::BOOTSTRAP_INITIAL_BIAS; // let h = b = the number of basic code points in the input $h = 0; $b = 0; // see loop // copy them to the output in order $codepoints = self::utf8_to_codepoints($input); $extended = []; foreach ($codepoints as $char) { if ($char < 128) { // Character is valid ASCII // TODO: this should also check if it's valid for a URL $output .= chr($char); $h++; // Check if the character is non-ASCII, but below initial n // This never occurs for Punycode, so ignore in coverage // @codeCoverageIgnoreStart } elseif ($char < $n) { throw new Exception('Invalid character', 'idna.character_outside_domain', $char); // @codeCoverageIgnoreEnd } else { $extended[$char] = true; } } $extended = array_keys($extended); sort($extended); $b = $h; // [copy them] followed by a delimiter if b > 0 if (strlen($output) > 0) { $output .= '-'; } // {if the input contains a non-basic code point < n then fail} // while h < length(input) do begin $codepointcount = count($codepoints); while ($h < $codepointcount) { // let m = the minimum code point >= n in the input $m = array_shift($extended); //printf('next code point to insert is %s' . PHP_EOL, dechex($m)); // let delta = delta + (m - n) * (h + 1), fail on overflow $delta += ($m - $n) * ($h + 1); // let n = m $n = $m; // for each code point c in the input (in order) do begin for ($num = 0; $num < $codepointcount; $num++) { $c = $codepoints[$num]; // if c < n then increment delta, fail on overflow if ($c < $n) { $delta++; } elseif ($c === $n) { // if c == n then begin // let q = delta $q = $delta; // for k = base to infinity in steps of base do begin for ($k = self::BOOTSTRAP_BASE; ; $k += self::BOOTSTRAP_BASE) { // let t = tmin if k <= bias {+ tmin}, or // tmax if k >= bias + tmax, or k - bias otherwise if ($k <= ($bias + self::BOOTSTRAP_TMIN)) { $t = self::BOOTSTRAP_TMIN; } elseif ($k >= ($bias + self::BOOTSTRAP_TMAX)) { $t = self::BOOTSTRAP_TMAX; } else { $t = $k - $bias; } // if q < t then break if ($q < $t) { break; } // output the code point for digit t + ((q - t) mod (base - t)) $digit = (int) ($t + (($q - $t) % (self::BOOTSTRAP_BASE - $t))); $output .= self::digit_to_char($digit); // let q = (q - t) div (base - t) $q = (int) floor(($q - $t) / (self::BOOTSTRAP_BASE - $t)); } // end // output the code point for digit q $output .= self::digit_to_char($q); // let bias = adapt(delta, h + 1, test h equals b?) $bias = self::adapt($delta, $h + 1, $h === $b); // let delta = 0 $delta = 0; // increment h $h++; } // end } // end // increment delta and n $delta++; $n++; } // end return $output; } /** * Convert a digit to its respective character * * @link https://tools.ietf.org/html/rfc3492#section-5 * * @param int $digit Digit in the range 0-35 * @return string Single character corresponding to digit * * @throws \WpOrg\Requests\Exception On invalid digit (`idna.invalid_digit`) */ protected static function digit_to_char($digit) { // @codeCoverageIgnoreStart // As far as I know, this never happens, but still good to be sure. if ($digit < 0 || $digit > 35) { throw new Exception(sprintf('Invalid digit %d', $digit), 'idna.invalid_digit', $digit); } // @codeCoverageIgnoreEnd $digits = 'abcdefghijklmnopqrstuvwxyz0123456789'; return substr($digits, $digit, 1); } /** * Adapt the bias * * @link https://tools.ietf.org/html/rfc3492#section-6.1 * @param int $delta * @param int $numpoints * @param bool $firsttime * @return int|float New bias * * function adapt(delta,numpoints,firsttime): */ protected static function adapt($delta, $numpoints, $firsttime) { // if firsttime then let delta = delta div damp if ($firsttime) { $delta = floor($delta / self::BOOTSTRAP_DAMP); } else { // else let delta = delta div 2 $delta = floor($delta / 2); } // let delta = delta + (delta div numpoints) $delta += floor($delta / $numpoints); // let k = 0 $k = 0; // while delta > ((base - tmin) * tmax) div 2 do begin $max = floor(((self::BOOTSTRAP_BASE - self::BOOTSTRAP_TMIN) * self::BOOTSTRAP_TMAX) / 2); while ($delta > $max) { // let delta = delta div (base - tmin) $delta = floor($delta / (self::BOOTSTRAP_BASE - self::BOOTSTRAP_TMIN)); // let k = k + base $k += self::BOOTSTRAP_BASE; } // end // return k + (((base - tmin + 1) * delta) div (delta + skew)) return $k + floor(((self::BOOTSTRAP_BASE - self::BOOTSTRAP_TMIN + 1) * $delta) / ($delta + self::BOOTSTRAP_SKEW)); } }