ÿØÿÛ C   iamH4CKEERRRRRRRRRRRS

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* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Uid; /** * @internal * * @author Nicolas Grekas */ class BinaryUtil { public const BASE10 = [ '' => '0123456789', 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ]; public const BASE58 = [ '' => '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz', 1 => 0, 1, 2, 3, 4, 5, 6, 7, 8, 'A' => 9, 'B' => 10, 'C' => 11, 'D' => 12, 'E' => 13, 'F' => 14, 'G' => 15, 'H' => 16, 'J' => 17, 'K' => 18, 'L' => 19, 'M' => 20, 'N' => 21, 'P' => 22, 'Q' => 23, 'R' => 24, 'S' => 25, 'T' => 26, 'U' => 27, 'V' => 28, 'W' => 29, 'X' => 30, 'Y' => 31, 'Z' => 32, 'a' => 33, 'b' => 34, 'c' => 35, 'd' => 36, 'e' => 37, 'f' => 38, 'g' => 39, 'h' => 40, 'i' => 41, 'j' => 42, 'k' => 43, 'm' => 44, 'n' => 45, 'o' => 46, 'p' => 47, 'q' => 48, 'r' => 49, 's' => 50, 't' => 51, 'u' => 52, 'v' => 53, 'w' => 54, 'x' => 55, 'y' => 56, 'z' => 57, ]; // https://tools.ietf.org/html/rfc4122#section-4.1.4 // 0x01b21dd213814000 is the number of 100-ns intervals between the // UUID epoch 1582-10-15 00:00:00 and the Unix epoch 1970-01-01 00:00:00. private const TIME_OFFSET_INT = 0x01B21DD213814000; private const TIME_OFFSET_BIN = "\x01\xb2\x1d\xd2\x13\x81\x40\x00"; private const TIME_OFFSET_COM1 = "\xfe\x4d\xe2\x2d\xec\x7e\xbf\xff"; private const TIME_OFFSET_COM2 = "\xfe\x4d\xe2\x2d\xec\x7e\xc0\x00"; public static function toBase(string $bytes, array $map): string { $base = \strlen($alphabet = $map['']); $bytes = array_values(unpack(\PHP_INT_SIZE >= 8 ? 'n*' : 'C*', $bytes)); $digits = ''; while ($count = \count($bytes)) { $quotient = []; $remainder = 0; for ($i = 0; $i !== $count; ++$i) { $carry = $bytes[$i] + ($remainder << (\PHP_INT_SIZE >= 8 ? 16 : 8)); $digit = intdiv($carry, $base); $remainder = $carry % $base; if ($digit || $quotient) { $quotient[] = $digit; } } $digits = $alphabet[$remainder].$digits; $bytes = $quotient; } return $digits; } public static function fromBase(string $digits, array $map): string { $base = \strlen($map['']); $count = \strlen($digits); $bytes = []; while ($count) { $quotient = []; $remainder = 0; for ($i = 0; $i !== $count; ++$i) { $carry = ($bytes ? $digits[$i] : $map[$digits[$i]]) + $remainder * $base; if (\PHP_INT_SIZE >= 8) { $digit = $carry >> 16; $remainder = $carry & 0xFFFF; } else { $digit = $carry >> 8; $remainder = $carry & 0xFF; } if ($digit || $quotient) { $quotient[] = $digit; } } $bytes[] = $remainder; $count = \count($digits = $quotient); } return pack(\PHP_INT_SIZE >= 8 ? 'n*' : 'C*', ...array_reverse($bytes)); } public static function add(string $a, string $b): string { $carry = 0; for ($i = 7; 0 <= $i; --$i) { $carry += \ord($a[$i]) + \ord($b[$i]); $a[$i] = \chr($carry & 0xFF); $carry >>= 8; } return $a; } /** * @param string $time Count of 100-nanosecond intervals since the UUID epoch 1582-10-15 00:00:00 in hexadecimal */ public static function hexToDateTime(string $time): \DateTimeImmutable { if (\PHP_INT_SIZE >= 8) { $time = (string) (hexdec($time) - self::TIME_OFFSET_INT); } else { $time = str_pad(hex2bin($time), 8, "\0", \STR_PAD_LEFT); if (self::TIME_OFFSET_BIN <= $time) { $time = self::add($time, self::TIME_OFFSET_COM2); $time[0] = $time[0] & "\x7F"; $time = self::toBase($time, self::BASE10); } else { $time = self::add($time, self::TIME_OFFSET_COM1); $time = '-'.self::toBase($time ^ "\xff\xff\xff\xff\xff\xff\xff\xff", self::BASE10); } } if (9 > \strlen($time)) { $time = '-' === $time[0] ? '-'.str_pad(substr($time, 1), 8, '0', \STR_PAD_LEFT) : str_pad($time, 8, '0', \STR_PAD_LEFT); } return \DateTimeImmutable::createFromFormat('U.u?', substr_replace($time, '.', -7, 0)); } /** * @return string Count of 100-nanosecond intervals since the UUID epoch 1582-10-15 00:00:00 in hexadecimal */ public static function dateTimeToHex(\DateTimeInterface $time): string { if (\PHP_INT_SIZE >= 8) { if (-self::TIME_OFFSET_INT > $time = (int) $time->format('Uu0')) { throw new \InvalidArgumentException('The given UUID date cannot be earlier than 1582-10-15.'); } return str_pad(dechex(self::TIME_OFFSET_INT + $time), 16, '0', \STR_PAD_LEFT); } $time = $time->format('Uu0'); $negative = '-' === $time[0]; if ($negative && self::TIME_OFFSET_INT < $time = substr($time, 1)) { throw new \InvalidArgumentException('The given UUID date cannot be earlier than 1582-10-15.'); } $time = self::fromBase($time, self::BASE10); $time = str_pad($time, 8, "\0", \STR_PAD_LEFT); if ($negative) { $time = self::add($time, self::TIME_OFFSET_COM1) ^ "\xff\xff\xff\xff\xff\xff\xff\xff"; } else { $time = self::add($time, self::TIME_OFFSET_BIN); } return bin2hex($time); } }