FAQ

<?php /** * Pure-PHP implementation of DES. * * Uses mcrypt, if available, and an internal implementation, otherwise. * * PHP version 5 * * Useful resources are as follows: * * - {@link http://en.wikipedia.org/wiki/DES_supplementary_material Wikipedia: DES supplementary material} * - {@link http://www.itl.nist.gov/fipspubs/fip46-2.htm FIPS 46-2 - (DES), Data Encryption Standard} * - {@link http://www.cs.eku.edu/faculty/styer/460/Encrypt/JS-DES.html JavaScript DES Example} * * Here's a short example of how to use this library: * <code> * <?php * include 'vendor/autoload.php'; * * $des = new \phpseclib3\Crypt\DES('ctr'); * * $des->setKey('abcdefgh'); * * $size = 10 * 1024; * $plaintext = ''; * for ($i = 0; $i < $size; $i++) { * $plaintext.= 'a'; * } * * echo $des->decrypt($des->encrypt($plaintext)); * ?> * </code> * * @author Jim Wigginton <terrafrost@php.net> * @copyright 2007 Jim Wigginton * @license http://www.opensource.org/licenses/mit-license.html MIT License * @link http://phpseclib.sourceforge.net */ namespace phpseclib3\Crypt; use phpseclib3\Crypt\Common\BlockCipher; use phpseclib3\Exception\BadModeException; /** * Pure-PHP implementation of DES. * * @author Jim Wigginton <terrafrost@php.net> */ class DES extends BlockCipher { /** * Contains $keys[self::ENCRYPT] * * @see \phpseclib3\Crypt\DES::setupKey() * @see \phpseclib3\Crypt\DES::processBlock() */ const ENCRYPT = 0; /** * Contains $keys[self::DECRYPT] * * @see \phpseclib3\Crypt\DES::setupKey() * @see \phpseclib3\Crypt\DES::processBlock() */ const DECRYPT = 1; /** * Block Length of the cipher * * @see \phpseclib3\Crypt\Common\SymmetricKey::block_size * @var int */ protected $block_size = 8; /** * Key Length (in bytes) * * @see \phpseclib3\Crypt\Common\SymmetricKey::setKeyLength() * @var int */ protected $key_length = 8; /** * The mcrypt specific name of the cipher * * @see \phpseclib3\Crypt\Common\SymmetricKey::cipher_name_mcrypt * @var string */ protected $cipher_name_mcrypt = 'des'; /** * The OpenSSL names of the cipher / modes * * @see \phpseclib3\Crypt\Common\SymmetricKey::openssl_mode_names * @var array */ protected $openssl_mode_names = [ self::MODE_ECB => 'des-ecb', self::MODE_CBC => 'des-cbc', self::MODE_CFB => 'des-cfb', self::MODE_OFB => 'des-ofb' // self::MODE_CTR is undefined for DES ]; /** * Optimizing value while CFB-encrypting * * @see \phpseclib3\Crypt\Common\SymmetricKey::cfb_init_len * @var int */ protected $cfb_init_len = 500; /** * Switch for DES/3DES encryption * * Used only if $engine == self::ENGINE_INTERNAL * * @see self::setupKey() * @see self::processBlock() * @var int */ protected $des_rounds = 1; /** * max possible size of $key * * @see self::setKey() * @var string */ protected $key_length_max = 8; /** * The Key Schedule * * @see self::setupKey() * @var array */ private $keys; /** * Key Cache "key" * * @see self::setupKey() * @var array */ private $kl; /** * Shuffle table. * * For each byte value index, the entry holds an 8-byte string * with each byte containing all bits in the same state as the * corresponding bit in the index value. * * @see self::processBlock() * @see self::setupKey() * @var array */ protected static $shuffle = [ "\x00\x00\x00\x00\x00\x00\x00\x00", "\x00\x00\x00\x00\x00\x00\x00\xFF", "\x00\x00\x00\x00\x00\x00\xFF\x00", "\x00\x00\x00\x00\x00\x00\xFF\xFF", "\x00\x00\x00\x00\x00\xFF\x00\x00", "\x00\x00\x00\x00\x00\xFF\x00\xFF", "\x00\x00\x00\x00\x00\xFF\xFF\x00", "\x00\x00\x00\x00\x00\xFF\xFF\xFF", "\x00\x00\x00\x00\xFF\x00\x00\x00", "\x00\x00\x00\x00\xFF\x00\x00\xFF", "\x00\x00\x00\x00\xFF\x00\xFF\x00", "\x00\x00\x00\x00\xFF\x00\xFF\xFF", "\x00\x00\x00\x00\xFF\xFF\x00\x00", "\x00\x00\x00\x00\xFF\xFF\x00\xFF", "\x00\x00\x00\x00\xFF\xFF\xFF\x00", "\x00\x00\x00\x00\xFF\xFF\xFF\xFF", "\x00\x00\x00\xFF\x00\x00\x00\x00", "\x00\x00\x00\xFF\x00\x00\x00\xFF", "\x00\x00\x00\xFF\x00\x00\xFF\x00", "\x00\x00\x00\xFF\x00\x00\xFF\xFF", "\x00\x00\x00\xFF\x00\xFF\x00\x00", "\x00\x00\x00\xFF\x00\xFF\x00\xFF", "\x00\x00\x00\xFF\x00\xFF\xFF\x00", "\x00\x00\x00\xFF\x00\xFF\xFF\xFF", "\x00\x00\x00\xFF\xFF\x00\x00\x00", "\x00\x00\x00\xFF\xFF\x00\x00\xFF", "\x00\x00\x00\xFF\xFF\x00\xFF\x00", "\x00\x00\x00\xFF\xFF\x00\xFF\xFF", "\x00\x00\x00\xFF\xFF\xFF\x00\x00", "\x00\x00\x00\xFF\xFF\xFF\x00\xFF", "\x00\x00\x00\xFF\xFF\xFF\xFF\x00", "\x00\x00\x00\xFF\xFF\xFF\xFF\xFF", "\x00\x00\xFF\x00\x00\x00\x00\x00", "\x00\x00\xFF\x00\x00\x00\x00\xFF", "\x00\x00\xFF\x00\x00\x00\xFF\x00", "\x00\x00\xFF\x00\x00\x00\xFF\xFF", "\x00\x00\xFF\x00\x00\xFF\x00\x00", "\x00\x00\xFF\x00\x00\xFF\x00\xFF", "\x00\x00\xFF\x00\x00\xFF\xFF\x00", "\x00\x00\xFF\x00\x00\xFF\xFF\xFF", "\x00\x00\xFF\x00\xFF\x00\x00\x00", "\x00\x00\xFF\x00\xFF\x00\x00\xFF", "\x00\x00\xFF\x00\xFF\x00\xFF\x00", "\x00\x00\xFF\x00\xFF\x00\xFF\xFF", "\x00\x00\xFF\x00\xFF\xFF\x00\x00", "\x00\x00\xFF\x00\xFF\xFF\x00\xFF", "\x00\x00\xFF\x00\xFF\xFF\xFF\x00", "\x00\x00\xFF\x00\xFF\xFF\xFF\xFF", "\x00\x00\xFF\xFF\x00\x00\x00\x00", "\x00\x00\xFF\xFF\x00\x00\x00\xFF", "\x00\x00\xFF\xFF\x00\x00\xFF\x00", "\x00\x00\xFF\xFF\x00\x00\xFF\xFF", "\x00\x00\xFF\xFF\x00\xFF\x00\x00", "\x00\x00\xFF\xFF\x00\xFF\x00\xFF", "\x00\x00\xFF\xFF\x00\xFF\xFF\x00", "\x00\x00\xFF\xFF\x00\xFF\xFF\xFF", "\x00\x00\xFF\xFF\xFF\x00\x00\x00", "\x00\x00\xFF\xFF\xFF\x00\x00\xFF", "\x00\x00\xFF\xFF\xFF\x00\xFF\x00", "\x00\x00\xFF\xFF\xFF\x00\xFF\xFF", "\x00\x00\xFF\xFF\xFF\xFF\x00\x00", "\x00\x00\xFF\xFF\xFF\xFF\x00\xFF", "\x00\x00\xFF\xFF\xFF\xFF\xFF\x00", "\x00\x00\xFF\xFF\xFF\xFF\xFF\xFF", "\x00\xFF\x00\x00\x00\x00\x00\x00", "\x00\xFF\x00\x00\x00\x00\x00\xFF", "\x00\xFF\x00\x00\x00\x00\xFF\x00", "\x00\xFF\x00\x00\x00\x00\xFF\xFF", "\x00\xFF\x00\x00\x00\xFF\x00\x00", "\x00\xFF\x00\x00\x00\xFF\x00\xFF", "\x00\xFF\x00\x00\x00\xFF\xFF\x00", "\x00\xFF\x00\x00\x00\xFF\xFF\xFF", "\x00\xFF\x00\x00\xFF\x00\x00\x00", "\x00\xFF\x00\x00\xFF\x00\x00\xFF", "\x00\xFF\x00\x00\xFF\x00\xFF\x00", "\x00\xFF\x00\x00\xFF\x00\xFF\xFF", "\x00\xFF\x00\x00\xFF\xFF\x00\x00", "\x00\xFF\x00\x00\xFF\xFF\x00\xFF", "\x00\xFF\x00\x00\xFF\xFF\xFF\x00", "\x00\xFF\x00\x00\xFF\xFF\xFF\xFF", "\x00\xFF\x00\xFF\x00\x00\x00\x00", "\x00\xFF\x00\xFF\x00\x00\x00\xFF", "\x00\xFF\x00\xFF\x00\x00\xFF\x00", "\x00\xFF\x00\xFF\x00\x00\xFF\xFF", "\x00\xFF\x00\xFF\x00\xFF\x00\x00", "\x00\xFF\x00\xFF\x00\xFF\x00\xFF", "\x00\xFF\x00\xFF\x00\xFF\xFF\x00", "\x00\xFF\x00\xFF\x00\xFF\xFF\xFF", "\x00\xFF\x00\xFF\xFF\x00\x00\x00", "\x00\xFF\x00\xFF\xFF\x00\x00\xFF", "\x00\xFF\x00\xFF\xFF\x00\xFF\x00", "\x00\xFF\x00\xFF\xFF\x00\xFF\xFF", "\x00\xFF\x00\xFF\xFF\xFF\x00\x00", "\x00\xFF\x00\xFF\xFF\xFF\x00\xFF", "\x00\xFF\x00\xFF\xFF\xFF\xFF\x00", "\x00\xFF\x00\xFF\xFF\xFF\xFF\xFF", "\x00\xFF\xFF\x00\x00\x00\x00\x00", "\x00\xFF\xFF\x00\x00\x00\x00\xFF", "\x00\xFF\xFF\x00\x00\x00\xFF\x00", "\x00\xFF\xFF\x00\x00\x00\xFF\xFF", "\x00\xFF\xFF\x00\x00\xFF\x00\x00", "\x00\xFF\xFF\x00\x00\xFF\x00\xFF", "\x00\xFF\xFF\x00\x00\xFF\xFF\x00", "\x00\xFF\xFF\x00\x00\xFF\xFF\xFF", "\x00\xFF\xFF\x00\xFF\x00\x00\x00", "\x00\xFF\xFF\x00\xFF\x00\x00\xFF", "\x00\xFF\xFF\x00\xFF\x00\xFF\x00", "\x00\xFF\xFF\x00\xFF\x00\xFF\xFF", "\x00\xFF\xFF\x00\xFF\xFF\x00\x00", "\x00\xFF\xFF\x00\xFF\xFF\x00\xFF", "\x00\xFF\xFF\x00\xFF\xFF\xFF\x00", "\x00\xFF\xFF\x00\xFF\xFF\xFF\xFF", "\x00\xFF\xFF\xFF\x00\x00\x00\x00", "\x00\xFF\xFF\xFF\x00\x00\x00\xFF", "\x00\xFF\xFF\xFF\x00\x00\xFF\x00", "\x00\xFF\xFF\xFF\x00\x00\xFF\xFF", "\x00\xFF\xFF\xFF\x00\xFF\x00\x00", "\x00\xFF\xFF\xFF\x00\xFF\x00\xFF", "\x00\xFF\xFF\xFF\x00\xFF\xFF\x00", "\x00\xFF\xFF\xFF\x00\xFF\xFF\xFF", "\x00\xFF\xFF\xFF\xFF\x00\x00\x00", "\x00\xFF\xFF\xFF\xFF\x00\x00\xFF", "\x00\xFF\xFF\xFF\xFF\x00\xFF\x00", "\x00\xFF\xFF\xFF\xFF\x00\xFF\xFF", "\x00\xFF\xFF\xFF\xFF\xFF\x00\x00", "\x00\xFF\xFF\xFF\xFF\xFF\x00\xFF", "\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00", "\x00\xFF\xFF\xFF\xFF\xFF\xFF\xFF", "\xFF\x00\x00\x00\x00\x00\x00\x00", "\xFF\x00\x00\x00\x00\x00\x00\xFF", "\xFF\x00\x00\x00\x00\x00\xFF\x00", "\xFF\x00\x00\x00\x00\x00\xFF\xFF", "\xFF\x00\x00\x00\x00\xFF\x00\x00", "\xFF\x00\x00\x00\x00\xFF\x00\xFF", "\xFF\x00\x00\x00\x00\xFF\xFF\x00", "\xFF\x00\x00\x00\x00\xFF\xFF\xFF", "\xFF\x00\x00\x00\xFF\x00\x00\x00", "\xFF\x00\x00\x00\xFF\x00\x00\xFF", "\xFF\x00\x00\x00\xFF\x00\xFF\x00", "\xFF\x00\x00\x00\xFF\x00\xFF\xFF", "\xFF\x00\x00\x00\xFF\xFF\x00\x00", "\xFF\x00\x00\x00\xFF\xFF\x00\xFF", "\xFF\x00\x00\x00\xFF\xFF\xFF\x00", "\xFF\x00\x00\x00\xFF\xFF\xFF\xFF", "\xFF\x00\x00\xFF\x00\x00\x00\x00", "\xFF\x00\x00\xFF\x00\x00\x00\xFF", "\xFF\x00\x00\xFF\x00\x00\xFF\x00", "\xFF\x00\x00\xFF\x00\x00\xFF\xFF", "\xFF\x00\x00\xFF\x00\xFF\x00\x00", "\xFF\x00\x00\xFF\x00\xFF\x00\xFF", "\xFF\x00\x00\xFF\x00\xFF\xFF\x00", "\xFF\x00\x00\xFF\x00\xFF\xFF\xFF", "\xFF\x00\x00\xFF\xFF\x00\x00\x00", "\xFF\x00\x00\xFF\xFF\x00\x00\xFF", "\xFF\x00\x00\xFF\xFF\x00\xFF\x00", "\xFF\x00\x00\xFF\xFF\x00\xFF\xFF", "\xFF\x00\x00\xFF\xFF\xFF\x00\x00", "\xFF\x00\x00\xFF\xFF\xFF\x00\xFF", "\xFF\x00\x00\xFF\xFF\xFF\xFF\x00", "\xFF\x00\x00\xFF\xFF\xFF\xFF\xFF", "\xFF\x00\xFF\x00\x00\x00\x00\x00", "\xFF\x00\xFF\x00\x00\x00\x00\xFF", "\xFF\x00\xFF\x00\x00\x00\xFF\x00", "\xFF\x00\xFF\x00\x00\x00\xFF\xFF", "\xFF\x00\xFF\x00\x00\xFF\x00\x00", "\xFF\x00\xFF\x00\x00\xFF\x00\xFF", "\xFF\x00\xFF\x00\x00\xFF\xFF\x00", "\xFF\x00\xFF\x00\x00\xFF\xFF\xFF", "\xFF\x00\xFF\x00\xFF\x00\x00\x00", "\xFF\x00\xFF\x00\xFF\x00\x00\xFF", "\xFF\x00\xFF\x00\xFF\x00\xFF\x00", "\xFF\x00\xFF\x00\xFF\x00\xFF\xFF", "\xFF\x00\xFF\x00\xFF\xFF\x00\x00", "\xFF\x00\xFF\x00\xFF\xFF\x00\xFF", "\xFF\x00\xFF\x00\xFF\xFF\xFF\x00", "\xFF\x00\xFF\x00\xFF\xFF\xFF\xFF", "\xFF\x00\xFF\xFF\x00\x00\x00\x00", "\xFF\x00\xFF\xFF\x00\x00\x00\xFF", "\xFF\x00\xFF\xFF\x00\x00\xFF\x00", "\xFF\x00\xFF\xFF\x00\x00\xFF\xFF", "\xFF\x00\xFF\xFF\x00\xFF\x00\x00", "\xFF\x00\xFF\xFF\x00\xFF\x00\xFF", "\xFF\x00\xFF\xFF\x00\xFF\xFF\x00", "\xFF\x00\xFF\xFF\x00\xFF\xFF\xFF", "\xFF\x00\xFF\xFF\xFF\x00\x00\x00", "\xFF\x00\xFF\xFF\xFF\x00\x00\xFF", "\xFF\x00\xFF\xFF\xFF\x00\xFF\x00", "\xFF\x00\xFF\xFF\xFF\x00\xFF\xFF", "\xFF\x00\xFF\xFF\xFF\xFF\x00\x00", "\xFF\x00\xFF\xFF\xFF\xFF\x00\xFF", "\xFF\x00\xFF\xFF\xFF\xFF\xFF\x00", "\xFF\x00\xFF\xFF\xFF\xFF\xFF\xFF", "\xFF\xFF\x00\x00\x00\x00\x00\x00", "\xFF\xFF\x00\x00\x00\x00\x00\xFF", "\xFF\xFF\x00\x00\x00\x00\xFF\x00", "\xFF\xFF\x00\x00\x00\x00\xFF\xFF", "\xFF\xFF\x00\x00\x00\xFF\x00\x00", "\xFF\xFF\x00\x00\x00\xFF\x00\xFF", "\xFF\xFF\x00\x00\x00\xFF\xFF\x00", "\xFF\xFF\x00\x00\x00\xFF\xFF\xFF", "\xFF\xFF\x00\x00\xFF\x00\x00\x00", "\xFF\xFF\x00\x00\xFF\x00\x00\xFF", "\xFF\xFF\x00\x00\xFF\x00\xFF\x00", "\xFF\xFF\x00\x00\xFF\x00\xFF\xFF", "\xFF\xFF\x00\x00\xFF\xFF\x00\x00", "\xFF\xFF\x00\x00\xFF\xFF\x00\xFF", "\xFF\xFF\x00\x00\xFF\xFF\xFF\x00", "\xFF\xFF\x00\x00\xFF\xFF\xFF\xFF", "\xFF\xFF\x00\xFF\x00\x00\x00\x00", "\xFF\xFF\x00\xFF\x00\x00\x00\xFF", "\xFF\xFF\x00\xFF\x00\x00\xFF\x00", "\xFF\xFF\x00\xFF\x00\x00\xFF\xFF", "\xFF\xFF\x00\xFF\x00\xFF\x00\x00", "\xFF\xFF\x00\xFF\x00\xFF\x00\xFF", "\xFF\xFF\x00\xFF\x00\xFF\xFF\x00", "\xFF\xFF\x00\xFF\x00\xFF\xFF\xFF", "\xFF\xFF\x00\xFF\xFF\x00\x00\x00", "\xFF\xFF\x00\xFF\xFF\x00\x00\xFF", "\xFF\xFF\x00\xFF\xFF\x00\xFF\x00", "\xFF\xFF\x00\xFF\xFF\x00\xFF\xFF", "\xFF\xFF\x00\xFF\xFF\xFF\x00\x00", "\xFF\xFF\x00\xFF\xFF\xFF\x00\xFF", "\xFF\xFF\x00\xFF\xFF\xFF\xFF\x00", "\xFF\xFF\x00\xFF\xFF\xFF\xFF\xFF", "\xFF\xFF\xFF\x00\x00\x00\x00\x00", "\xFF\xFF\xFF\x00\x00\x00\x00\xFF", "\xFF\xFF\xFF\x00\x00\x00\xFF\x00", "\xFF\xFF\xFF\x00\x00\x00\xFF\xFF", "\xFF\xFF\xFF\x00\x00\xFF\x00\x00", "\xFF\xFF\xFF\x00\x00\xFF\x00\xFF", "\xFF\xFF\xFF\x00\x00\xFF\xFF\x00", "\xFF\xFF\xFF\x00\x00\xFF\xFF\xFF", "\xFF\xFF\xFF\x00\xFF\x00\x00\x00", "\xFF\xFF\xFF\x00\xFF\x00\x00\xFF", "\xFF\xFF\xFF\x00\xFF\x00\xFF\x00", "\xFF\xFF\xFF\x00\xFF\x00\xFF\xFF", "\xFF\xFF\xFF\x00\xFF\xFF\x00\x00", "\xFF\xFF\xFF\x00\xFF\xFF\x00\xFF", "\xFF\xFF\xFF\x00\xFF\xFF\xFF\x00", "\xFF\xFF\xFF\x00\xFF\xFF\xFF\xFF", "\xFF\xFF\xFF\xFF\x00\x00\x00\x00", "\xFF\xFF\xFF\xFF\x00\x00\x00\xFF", "\xFF\xFF\xFF\xFF\x00\x00\xFF\x00", "\xFF\xFF\xFF\xFF\x00\x00\xFF\xFF", "\xFF\xFF\xFF\xFF\x00\xFF\x00\x00", "\xFF\xFF\xFF\xFF\x00\xFF\x00\xFF", "\xFF\xFF\xFF\xFF\x00\xFF\xFF\x00", "\xFF\xFF\xFF\xFF\x00\xFF\xFF\xFF", "\xFF\xFF\xFF\xFF\xFF\x00\x00\x00", "\xFF\xFF\xFF\xFF\xFF\x00\x00\xFF", "\xFF\xFF\xFF\xFF\xFF\x00\xFF\x00", "\xFF\xFF\xFF\xFF\xFF\x00\xFF\xFF", "\xFF\xFF\xFF\xFF\xFF\xFF\x00\x00", "\xFF\xFF\xFF\xFF\xFF\xFF\x00\xFF", "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\x00", "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF" ]; /** * IP mapping helper table. * * Indexing this table with each source byte performs the initial bit permutation. * * @var array */ protected static $ipmap = [ 0x00, 0x10, 0x01, 0x11, 0x20, 0x30, 0x21, 0x31, 0x02, 0x12, 0x03, 0x13, 0x22, 0x32, 0x23, 0x33, 0x40, 0x50, 0x41, 0x51, 0x60, 0x70, 0x61, 0x71, 0x42, 0x52, 0x43, 0x53, 0x62, 0x72, 0x63, 0x73, 0x04, 0x14, 0x05, 0x15, 0x24, 0x34, 0x25, 0x35, 0x06, 0x16, 0x07, 0x17, 0x26, 0x36, 0x27, 0x37, 0x44, 0x54, 0x45, 0x55, 0x64, 0x74, 0x65, 0x75, 0x46, 0x56, 0x47, 0x57, 0x66, 0x76, 0x67, 0x77, 0x80, 0x90, 0x81, 0x91, 0xA0, 0xB0, 0xA1, 0xB1, 0x82, 0x92, 0x83, 0x93, 0xA2, 0xB2, 0xA3, 0xB3, 0xC0, 0xD0, 0xC1, 0xD1, 0xE0, 0xF0, 0xE1, 0xF1, 0xC2, 0xD2, 0xC3, 0xD3, 0xE2, 0xF2, 0xE3, 0xF3, 0x84, 0x94, 0x85, 0x95, 0xA4, 0xB4, 0xA5, 0xB5, 0x86, 0x96, 0x87, 0x97, 0xA6, 0xB6, 0xA7, 0xB7, 0xC4, 0xD4, 0xC5, 0xD5, 0xE4, 0xF4, 0xE5, 0xF5, 0xC6, 0xD6, 0xC7, 0xD7, 0xE6, 0xF6, 0xE7, 0xF7, 0x08, 0x18, 0x09, 0x19, 0x28, 0x38, 0x29, 0x39, 0x0A, 0x1A, 0x0B, 0x1B, 0x2A, 0x3A, 0x2B, 0x3B, 0x48, 0x58, 0x49, 0x59, 0x68, 0x78, 0x69, 0x79, 0x4A, 0x5A, 0x4B, 0x5B, 0x6A, 0x7A, 0x6B, 0x7B, 0x0C, 0x1C, 0x0D, 0x1D, 0x2C, 0x3C, 0x2D, 0x3D, 0x0E, 0x1E, 0x0F, 0x1F, 0x2E, 0x3E, 0x2F, 0x3F, 0x4C, 0x5C, 0x4D, 0x5D, 0x6C, 0x7C, 0x6D, 0x7D, 0x4E, 0x5E, 0x4F, 0x5F, 0x6E, 0x7E, 0x6F, 0x7F, 0x88, 0x98, 0x89, 0x99, 0xA8, 0xB8, 0xA9, 0xB9, 0x8A, 0x9A, 0x8B, 0x9B, 0xAA, 0xBA, 0xAB, 0xBB, 0xC8, 0xD8, 0xC9, 0xD9, 0xE8, 0xF8, 0xE9, 0xF9, 0xCA, 0xDA, 0xCB, 0xDB, 0xEA, 0xFA, 0xEB, 0xFB, 0x8C, 0x9C, 0x8D, 0x9D, 0xAC, 0xBC, 0xAD, 0xBD, 0x8E, 0x9E, 0x8F, 0x9F, 0xAE, 0xBE, 0xAF, 0xBF, 0xCC, 0xDC, 0xCD, 0xDD, 0xEC, 0xFC, 0xED, 0xFD, 0xCE, 0xDE, 0xCF, 0xDF, 0xEE, 0xFE, 0xEF, 0xFF ]; /** * Inverse IP mapping helper table. * Indexing this table with a byte value reverses the bit order. * * @var array */ protected static $invipmap = [ 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0, 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8, 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4, 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC, 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2, 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6, 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE, 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1, 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9, 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5, 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD, 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3, 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB, 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF ]; /** * Pre-permuted S-box1 * * Each box ($sbox1-$sbox8) has been vectorized, then each value pre-permuted using the * P table: concatenation can then be replaced by exclusive ORs. * * @var array */ protected static $sbox1 = [ 0x00808200, 0x00000000, 0x00008000, 0x00808202, 0x00808002, 0x00008202, 0x00000002, 0x00008000, 0x00000200, 0x00808200, 0x00808202, 0x00000200, 0x00800202, 0x00808002, 0x00800000, 0x00000002, 0x00000202, 0x00800200, 0x00800200, 0x00008200, 0x00008200, 0x00808000, 0x00808000, 0x00800202, 0x00008002, 0x00800002, 0x00800002, 0x00008002, 0x00000000, 0x00000202, 0x00008202, 0x00800000, 0x00008000, 0x00808202, 0x00000002, 0x00808000, 0x00808200, 0x00800000, 0x00800000, 0x00000200, 0x00808002, 0x00008000, 0x00008200, 0x00800002, 0x00000200, 0x00000002, 0x00800202, 0x00008202, 0x00808202, 0x00008002, 0x00808000, 0x00800202, 0x00800002, 0x00000202, 0x00008202, 0x00808200, 0x00000202, 0x00800200, 0x00800200, 0x00000000, 0x00008002, 0x00008200, 0x00000000, 0x00808002 ]; /** * Pre-permuted S-box2 * * @var array */ protected static $sbox2 = [ 0x40084010, 0x40004000, 0x00004000, 0x00084010, 0x00080000, 0x00000010, 0x40080010, 0x40004010, 0x40000010, 0x40084010, 0x40084000, 0x40000000, 0x40004000, 0x00080000, 0x00000010, 0x40080010, 0x00084000, 0x00080010, 0x40004010, 0x00000000, 0x40000000, 0x00004000, 0x00084010, 0x40080000, 0x00080010, 0x40000010, 0x00000000, 0x00084000, 0x00004010, 0x40084000, 0x40080000, 0x00004010, 0x00000000, 0x00084010, 0x40080010, 0x00080000, 0x40004010, 0x40080000, 0x40084000, 0x00004000, 0x40080000, 0x40004000, 0x00000010, 0x40084010, 0x00084010, 0x00000010, 0x00004000, 0x40000000, 0x00004010, 0x40084000, 0x00080000, 0x40000010, 0x00080010, 0x40004010, 0x40000010, 0x00080010, 0x00084000, 0x00000000, 0x40004000, 0x00004010, 0x40000000, 0x40080010, 0x40084010, 0x00084000 ]; /** * Pre-permuted S-box3 * * @var array */ protected static $sbox3 = [ 0x00000104, 0x04010100, 0x00000000, 0x04010004, 0x04000100, 0x00000000, 0x00010104, 0x04000100, 0x00010004, 0x04000004, 0x04000004, 0x00010000, 0x04010104, 0x00010004, 0x04010000, 0x00000104, 0x04000000, 0x00000004, 0x04010100, 0x00000100, 0x00010100, 0x04010000, 0x04010004, 0x00010104, 0x04000104, 0x00010100, 0x00010000, 0x04000104, 0x00000004, 0x04010104, 0x00000100, 0x04000000, 0x04010100, 0x04000000, 0x00010004, 0x00000104, 0x00010000, 0x04010100, 0x04000100, 0x00000000, 0x00000100, 0x00010004, 0x04010104, 0x04000100, 0x04000004, 0x00000100, 0x00000000, 0x04010004, 0x04000104, 0x00010000, 0x04000000, 0x04010104, 0x00000004, 0x00010104, 0x00010100, 0x04000004, 0x04010000, 0x04000104, 0x00000104, 0x04010000, 0x00010104, 0x00000004, 0x04010004, 0x00010100 ]; /** * Pre-permuted S-box4 * * @var array */ protected static $sbox4 = [ 0x80401000, 0x80001040, 0x80001040, 0x00000040, 0x00401040, 0x80400040, 0x80400000, 0x80001000, 0x00000000, 0x00401000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00400040, 0x80400000, 0x80000000, 0x00001000, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x80001000, 0x00001040, 0x80400040, 0x80000000, 0x00001040, 0x00400040, 0x00001000, 0x00401040, 0x80401040, 0x80000040, 0x00400040, 0x80400000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00000000, 0x00401000, 0x00001040, 0x00400040, 0x80400040, 0x80000000, 0x80401000, 0x80001040, 0x80001040, 0x00000040, 0x80401040, 0x80000040, 0x80000000, 0x00001000, 0x80400000, 0x80001000, 0x00401040, 0x80400040, 0x80001000, 0x00001040, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x00001000, 0x00401040 ]; /** * Pre-permuted S-box5 * * @var array */ protected static $sbox5 = [ 0x00000080, 0x01040080, 0x01040000, 0x21000080, 0x00040000, 0x00000080, 0x20000000, 0x01040000, 0x20040080, 0x00040000, 0x01000080, 0x20040080, 0x21000080, 0x21040000, 0x00040080, 0x20000000, 0x01000000, 0x20040000, 0x20040000, 0x00000000, 0x20000080, 0x21040080, 0x21040080, 0x01000080, 0x21040000, 0x20000080, 0x00000000, 0x21000000, 0x01040080, 0x01000000, 0x21000000, 0x00040080, 0x00040000, 0x21000080, 0x00000080, 0x01000000, 0x20000000, 0x01040000, 0x21000080, 0x20040080, 0x01000080, 0x20000000, 0x21040000, 0x01040080, 0x20040080, 0x00000080, 0x01000000, 0x21040000, 0x21040080, 0x00040080, 0x21000000, 0x21040080, 0x01040000, 0x00000000, 0x20040000, 0x21000000, 0x00040080, 0x01000080, 0x20000080, 0x00040000, 0x00000000, 0x20040000, 0x01040080, 0x20000080 ]; /** * Pre-permuted S-box6 * * @var array */ protected static $sbox6 = [ 0x10000008, 0x10200000, 0x00002000, 0x10202008, 0x10200000, 0x00000008, 0x10202008, 0x00200000, 0x10002000, 0x00202008, 0x00200000, 0x10000008, 0x00200008, 0x10002000, 0x10000000, 0x00002008, 0x00000000, 0x00200008, 0x10002008, 0x00002000, 0x00202000, 0x10002008, 0x00000008, 0x10200008, 0x10200008, 0x00000000, 0x00202008, 0x10202000, 0x00002008, 0x00202000, 0x10202000, 0x10000000, 0x10002000, 0x00000008, 0x10200008, 0x00202000, 0x10202008, 0x00200000, 0x00002008, 0x10000008, 0x00200000, 0x10002000, 0x10000000, 0x00002008, 0x10000008, 0x10202008, 0x00202000, 0x10200000, 0x00202008, 0x10202000, 0x00000000, 0x10200008, 0x00000008, 0x00002000, 0x10200000, 0x00202008, 0x00002000, 0x00200008, 0x10002008, 0x00000000, 0x10202000, 0x10000000, 0x00200008, 0x10002008 ]; /** * Pre-permuted S-box7 * * @var array */ protected static $sbox7 = [ 0x00100000, 0x02100001, 0x02000401, 0x00000000, 0x00000400, 0x02000401, 0x00100401, 0x02100400, 0x02100401, 0x00100000, 0x00000000, 0x02000001, 0x00000001, 0x02000000, 0x02100001, 0x00000401, 0x02000400, 0x00100401, 0x00100001, 0x02000400, 0x02000001, 0x02100000, 0x02100400, 0x00100001, 0x02100000, 0x00000400, 0x00000401, 0x02100401, 0x00100400, 0x00000001, 0x02000000, 0x00100400, 0x02000000, 0x00100400, 0x00100000, 0x02000401, 0x02000401, 0x02100001, 0x02100001, 0x00000001, 0x00100001, 0x02000000, 0x02000400, 0x00100000, 0x02100400, 0x00000401, 0x00100401, 0x02100400, 0x00000401, 0x02000001, 0x02100401, 0x02100000, 0x00100400, 0x00000000, 0x00000001, 0x02100401, 0x00000000, 0x00100401, 0x02100000, 0x00000400, 0x02000001, 0x02000400, 0x00000400, 0x00100001 ]; /** * Pre-permuted S-box8 * * @var array */ protected static $sbox8 = [ 0x08000820, 0x00000800, 0x00020000, 0x08020820, 0x08000000, 0x08000820, 0x00000020, 0x08000000, 0x00020020, 0x08020000, 0x08020820, 0x00020800, 0x08020800, 0x00020820, 0x00000800, 0x00000020, 0x08020000, 0x08000020, 0x08000800, 0x00000820, 0x00020800, 0x00020020, 0x08020020, 0x08020800, 0x00000820, 0x00000000, 0x00000000, 0x08020020, 0x08000020, 0x08000800, 0x00020820, 0x00020000, 0x00020820, 0x00020000, 0x08020800, 0x00000800, 0x00000020, 0x08020020, 0x00000800, 0x00020820, 0x08000800, 0x00000020, 0x08000020, 0x08020000, 0x08020020, 0x08000000, 0x00020000, 0x08000820, 0x00000000, 0x08020820, 0x00020020, 0x08000020, 0x08020000, 0x08000800, 0x08000820, 0x00000000, 0x08020820, 0x00020800, 0x00020800, 0x00000820, 0x00000820, 0x00020020, 0x08000000, 0x08020800 ]; /** * Default Constructor. * * @param string $mode * @throws BadModeException if an invalid / unsupported mode is provided */ public function __construct($mode) { parent::__construct($mode); if ($this->mode == self::MODE_STREAM) { throw new BadModeException('Block ciphers cannot be ran in stream mode'); } } /** * Test for engine validity * * This is mainly just a wrapper to set things up for \phpseclib3\Crypt\Common\SymmetricKey::isValidEngine() * * @see \phpseclib3\Crypt\Common\SymmetricKey::isValidEngine() * @param int $engine * @return bool */ protected function isValidEngineHelper($engine) { if ($this->key_length_max == 8) { if ($engine == self::ENGINE_OPENSSL) { // quoting https://www.openssl.org/news/openssl-3.0-notes.html, OpenSSL 3.0.1 // "Moved all variations of the EVP ciphers CAST5, BF, IDEA, SEED, RC2, RC4, RC5, and DES to the legacy provider" // in theory openssl_get_cipher_methods() should catch this but, on GitHub Actions, at least, it does not if (defined('OPENSSL_VERSION_TEXT') && version_compare(preg_replace('#OpenSSL (\d+\.\d+\.\d+) .*#', '$1', OPENSSL_VERSION_TEXT), '3.0.1', '>=')) { return false; } $this->cipher_name_openssl_ecb = 'des-ecb'; $this->cipher_name_openssl = 'des-' . $this->openssl_translate_mode(); } } return parent::isValidEngineHelper($engine); } /** * Sets the key. * * Keys must be 64-bits long or 8 bytes long. * * DES also requires that every eighth bit be a parity bit, however, we'll ignore that. * * @see \phpseclib3\Crypt\Common\SymmetricKey::setKey() * @param string $key */ public function setKey($key) { if (!($this instanceof TripleDES) && strlen($key) != 8) { throw new \LengthException('Key of size ' . strlen($key) . ' not supported by this algorithm. Only keys of size 8 are supported'); } // Sets the key parent::setKey($key); } /** * Encrypts a block * * @see \phpseclib3\Crypt\Common\SymmetricKey::encryptBlock() * @see \phpseclib3\Crypt\Common\SymmetricKey::encrypt() * @see self::encrypt() * @param string $in * @return string */ protected function encryptBlock($in) { return $this->processBlock($in, self::ENCRYPT); } /** * Decrypts a block * * @see \phpseclib3\Crypt\Common\SymmetricKey::decryptBlock() * @see \phpseclib3\Crypt\Common\SymmetricKey::decrypt() * @see self::decrypt() * @param string $in * @return string */ protected function decryptBlock($in) { return $this->processBlock($in, self::DECRYPT); } /** * Encrypts or decrypts a 64-bit block * * $mode should be either self::ENCRYPT or self::DECRYPT. See * {@link http://en.wikipedia.org/wiki/Image:Feistel.png Feistel.png} to get a general * idea of what this function does. * * @see self::encryptBlock() * @see self::decryptBlock() * @param string $block * @param int $mode * @return string */ private function processBlock($block, $mode) { static $sbox1, $sbox2, $sbox3, $sbox4, $sbox5, $sbox6, $sbox7, $sbox8, $shuffleip, $shuffleinvip; if (!$sbox1) { $sbox1 = array_map('intval', self::$sbox1); $sbox2 = array_map('intval', self::$sbox2); $sbox3 = array_map('intval', self::$sbox3); $sbox4 = array_map('intval', self::$sbox4); $sbox5 = array_map('intval', self::$sbox5); $sbox6 = array_map('intval', self::$sbox6); $sbox7 = array_map('intval', self::$sbox7); $sbox8 = array_map('intval', self::$sbox8); /* Merge $shuffle with $[inv]ipmap */ for ($i = 0; $i < 256; ++$i) { $shuffleip[] = self::$shuffle[self::$ipmap[$i]]; $shuffleinvip[] = self::$shuffle[self::$invipmap[$i]]; } } $keys = $this->keys[$mode]; $ki = -1; // Do the initial IP permutation. $t = unpack('Nl/Nr', $block); list($l, $r) = [$t['l'], $t['r']]; $block = ($shuffleip[ $r & 0xFF] & "\x80\x80\x80\x80\x80\x80\x80\x80") | ($shuffleip[($r >> 8) & 0xFF] & "\x40\x40\x40\x40\x40\x40\x40\x40") | ($shuffleip[($r >> 16) & 0xFF] & "\x20\x20\x20\x20\x20\x20\x20\x20") | ($shuffleip[($r >> 24) & 0xFF] & "\x10\x10\x10\x10\x10\x10\x10\x10") | ($shuffleip[ $l & 0xFF] & "\x08\x08\x08\x08\x08\x08\x08\x08") | ($shuffleip[($l >> 8) & 0xFF] & "\x04\x04\x04\x04\x04\x04\x04\x04") | ($shuffleip[($l >> 16) & 0xFF] & "\x02\x02\x02\x02\x02\x02\x02\x02") | ($shuffleip[($l >> 24) & 0xFF] & "\x01\x01\x01\x01\x01\x01\x01\x01"); // Extract L0 and R0. $t = unpack('Nl/Nr', $block); list($l, $r) = [$t['l'], $t['r']]; for ($des_round = 0; $des_round < $this->des_rounds; ++$des_round) { // Perform the 16 steps. for ($i = 0; $i < 16; $i++) { // start of "the Feistel (F) function" - see the following URL: // http://en.wikipedia.org/wiki/Image:Data_Encryption_Standard_InfoBox_Diagram.png // Merge key schedule. $b1 = (($r >> 3) & 0x1FFFFFFF) ^ ($r << 29) ^ $keys[++$ki]; $b2 = (($r >> 31) & 0x00000001) ^ ($r << 1) ^ $keys[++$ki]; // S-box indexing. $t = $sbox1[($b1 >> 24) & 0x3F] ^ $sbox2[($b2 >> 24) & 0x3F] ^ $sbox3[($b1 >> 16) & 0x3F] ^ $sbox4[($b2 >> 16) & 0x3F] ^ $sbox5[($b1 >> 8) & 0x3F] ^ $sbox6[($b2 >> 8) & 0x3F] ^ $sbox7[ $b1 & 0x3F] ^ $sbox8[ $b2 & 0x3F] ^ $l; // end of "the Feistel (F) function" $l = $r; $r = $t; } // Last step should not permute L & R. $t = $l; $l = $r; $r = $t; } // Perform the inverse IP permutation. return ($shuffleinvip[($r >> 24) & 0xFF] & "\x80\x80\x80\x80\x80\x80\x80\x80") | ($shuffleinvip[($l >> 24) & 0xFF] & "\x40\x40\x40\x40\x40\x40\x40\x40") | ($shuffleinvip[($r >> 16) & 0xFF] & "\x20\x20\x20\x20\x20\x20\x20\x20") | ($shuffleinvip[($l >> 16) & 0xFF] & "\x10\x10\x10\x10\x10\x10\x10\x10") | ($shuffleinvip[($r >> 8) & 0xFF] & "\x08\x08\x08\x08\x08\x08\x08\x08") | ($shuffleinvip[($l >> 8) & 0xFF] & "\x04\x04\x04\x04\x04\x04\x04\x04") | ($shuffleinvip[ $r & 0xFF] & "\x02\x02\x02\x02\x02\x02\x02\x02") | ($shuffleinvip[ $l & 0xFF] & "\x01\x01\x01\x01\x01\x01\x01\x01"); } /** * Creates the key schedule * * @see \phpseclib3\Crypt\Common\SymmetricKey::setupKey() */ protected function setupKey() { if (isset($this->kl['key']) && $this->key === $this->kl['key'] && $this->des_rounds === $this->kl['des_rounds']) { // already expanded return; } $this->kl = ['key' => $this->key, 'des_rounds' => $this->des_rounds]; static $shifts = [ // number of key bits shifted per round 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 ]; static $pc1map = [ 0x00, 0x00, 0x08, 0x08, 0x04, 0x04, 0x0C, 0x0C, 0x02, 0x02, 0x0A, 0x0A, 0x06, 0x06, 0x0E, 0x0E, 0x10, 0x10, 0x18, 0x18, 0x14, 0x14, 0x1C, 0x1C, 0x12, 0x12, 0x1A, 0x1A, 0x16, 0x16, 0x1E, 0x1E, 0x20, 0x20, 0x28, 0x28, 0x24, 0x24, 0x2C, 0x2C, 0x22, 0x22, 0x2A, 0x2A, 0x26, 0x26, 0x2E, 0x2E, 0x30, 0x30, 0x38, 0x38, 0x34, 0x34, 0x3C, 0x3C, 0x32, 0x32, 0x3A, 0x3A, 0x36, 0x36, 0x3E, 0x3E, 0x40, 0x40, 0x48, 0x48, 0x44, 0x44, 0x4C, 0x4C, 0x42, 0x42, 0x4A, 0x4A, 0x46, 0x46, 0x4E, 0x4E, 0x50, 0x50, 0x58, 0x58, 0x54, 0x54, 0x5C, 0x5C, 0x52, 0x52, 0x5A, 0x5A, 0x56, 0x56, 0x5E, 0x5E, 0x60, 0x60, 0x68, 0x68, 0x64, 0x64, 0x6C, 0x6C, 0x62, 0x62, 0x6A, 0x6A, 0x66, 0x66, 0x6E, 0x6E, 0x70, 0x70, 0x78, 0x78, 0x74, 0x74, 0x7C, 0x7C, 0x72, 0x72, 0x7A, 0x7A, 0x76, 0x76, 0x7E, 0x7E, 0x80, 0x80, 0x88, 0x88, 0x84, 0x84, 0x8C, 0x8C, 0x82, 0x82, 0x8A, 0x8A, 0x86, 0x86, 0x8E, 0x8E, 0x90, 0x90, 0x98, 0x98, 0x94, 0x94, 0x9C, 0x9C, 0x92, 0x92, 0x9A, 0x9A, 0x96, 0x96, 0x9E, 0x9E, 0xA0, 0xA0, 0xA8, 0xA8, 0xA4, 0xA4, 0xAC, 0xAC, 0xA2, 0xA2, 0xAA, 0xAA, 0xA6, 0xA6, 0xAE, 0xAE, 0xB0, 0xB0, 0xB8, 0xB8, 0xB4, 0xB4, 0xBC, 0xBC, 0xB2, 0xB2, 0xBA, 0xBA, 0xB6, 0xB6, 0xBE, 0xBE, 0xC0, 0xC0, 0xC8, 0xC8, 0xC4, 0xC4, 0xCC, 0xCC, 0xC2, 0xC2, 0xCA, 0xCA, 0xC6, 0xC6, 0xCE, 0xCE, 0xD0, 0xD0, 0xD8, 0xD8, 0xD4, 0xD4, 0xDC, 0xDC, 0xD2, 0xD2, 0xDA, 0xDA, 0xD6, 0xD6, 0xDE, 0xDE, 0xE0, 0xE0, 0xE8, 0xE8, 0xE4, 0xE4, 0xEC, 0xEC, 0xE2, 0xE2, 0xEA, 0xEA, 0xE6, 0xE6, 0xEE, 0xEE, 0xF0, 0xF0, 0xF8, 0xF8, 0xF4, 0xF4, 0xFC, 0xFC, 0xF2, 0xF2, 0xFA, 0xFA, 0xF6, 0xF6, 0xFE, 0xFE ]; // Mapping tables for the PC-2 transformation. static $pc2mapc1 = [ 0x00000000, 0x00000400, 0x00200000, 0x00200400, 0x00000001, 0x00000401, 0x00200001, 0x00200401, 0x02000000, 0x02000400, 0x02200000, 0x02200400, 0x02000001, 0x02000401, 0x02200001, 0x02200401 ]; static $pc2mapc2 = [ 0x00000000, 0x00000800, 0x08000000, 0x08000800, 0x00010000, 0x00010800, 0x08010000, 0x08010800, 0x00000000, 0x00000800, 0x08000000, 0x08000800, 0x00010000, 0x00010800, 0x08010000, 0x08010800, 0x00000100, 0x00000900, 0x08000100, 0x08000900, 0x00010100, 0x00010900, 0x08010100, 0x08010900, 0x00000100, 0x00000900, 0x08000100, 0x08000900, 0x00010100, 0x00010900, 0x08010100, 0x08010900, 0x00000010, 0x00000810, 0x08000010, 0x08000810, 0x00010010, 0x00010810, 0x08010010, 0x08010810, 0x00000010, 0x00000810, 0x08000010, 0x08000810, 0x00010010, 0x00010810, 0x08010010, 0x08010810, 0x00000110, 0x00000910, 0x08000110, 0x08000910, 0x00010110, 0x00010910, 0x08010110, 0x08010910, 0x00000110, 0x00000910, 0x08000110, 0x08000910, 0x00010110, 0x00010910, 0x08010110, 0x08010910, 0x00040000, 0x00040800, 0x08040000, 0x08040800, 0x00050000, 0x00050800, 0x08050000, 0x08050800, 0x00040000, 0x00040800, 0x08040000, 0x08040800, 0x00050000, 0x00050800, 0x08050000, 0x08050800, 0x00040100, 0x00040900, 0x08040100, 0x08040900, 0x00050100, 0x00050900, 0x08050100, 0x08050900, 0x00040100, 0x00040900, 0x08040100, 0x08040900, 0x00050100, 0x00050900, 0x08050100, 0x08050900, 0x00040010, 0x00040810, 0x08040010, 0x08040810, 0x00050010, 0x00050810, 0x08050010, 0x08050810, 0x00040010, 0x00040810, 0x08040010, 0x08040810, 0x00050010, 0x00050810, 0x08050010, 0x08050810, 0x00040110, 0x00040910, 0x08040110, 0x08040910, 0x00050110, 0x00050910, 0x08050110, 0x08050910, 0x00040110, 0x00040910, 0x08040110, 0x08040910, 0x00050110, 0x00050910, 0x08050110, 0x08050910, 0x01000000, 0x01000800, 0x09000000, 0x09000800, 0x01010000, 0x01010800, 0x09010000, 0x09010800, 0x01000000, 0x01000800, 0x09000000, 0x09000800, 0x01010000, 0x01010800, 0x09010000, 0x09010800, 0x01000100, 0x01000900, 0x09000100, 0x09000900, 0x01010100, 0x01010900, 0x09010100, 0x09010900, 0x01000100, 0x01000900, 0x09000100, 0x09000900, 0x01010100, 0x01010900, 0x09010100, 0x09010900, 0x01000010, 0x01000810, 0x09000010, 0x09000810, 0x01010010, 0x01010810, 0x09010010, 0x09010810, 0x01000010, 0x01000810, 0x09000010, 0x09000810, 0x01010010, 0x01010810, 0x09010010, 0x09010810, 0x01000110, 0x01000910, 0x09000110, 0x09000910, 0x01010110, 0x01010910, 0x09010110, 0x09010910, 0x01000110, 0x01000910, 0x09000110, 0x09000910, 0x01010110, 0x01010910, 0x09010110, 0x09010910, 0x01040000, 0x01040800, 0x09040000, 0x09040800, 0x01050000, 0x01050800, 0x09050000, 0x09050800, 0x01040000, 0x01040800, 0x09040000, 0x09040800, 0x01050000, 0x01050800, 0x09050000, 0x09050800, 0x01040100, 0x01040900, 0x09040100, 0x09040900, 0x01050100, 0x01050900, 0x09050100, 0x09050900, 0x01040100, 0x01040900, 0x09040100, 0x09040900, 0x01050100, 0x01050900, 0x09050100, 0x09050900, 0x01040010, 0x01040810, 0x09040010, 0x09040810, 0x01050010, 0x01050810, 0x09050010, 0x09050810, 0x01040010, 0x01040810, 0x09040010, 0x09040810, 0x01050010, 0x01050810, 0x09050010, 0x09050810, 0x01040110, 0x01040910, 0x09040110, 0x09040910, 0x01050110, 0x01050910, 0x09050110, 0x09050910, 0x01040110, 0x01040910, 0x09040110, 0x09040910, 0x01050110, 0x01050910, 0x09050110, 0x09050910 ]; static $pc2mapc3 = [ 0x00000000, 0x00000004, 0x00001000, 0x00001004, 0x00000000, 0x00000004, 0x00001000, 0x00001004, 0x10000000, 0x10000004, 0x10001000, 0x10001004, 0x10000000, 0x10000004, 0x10001000, 0x10001004, 0x00000020, 0x00000024, 0x00001020, 0x00001024, 0x00000020, 0x00000024, 0x00001020, 0x00001024, 0x10000020, 0x10000024, 0x10001020, 0x10001024, 0x10000020, 0x10000024, 0x10001020, 0x10001024, 0x00080000, 0x00080004, 0x00081000, 0x00081004, 0x00080000, 0x00080004, 0x00081000, 0x00081004, 0x10080000, 0x10080004, 0x10081000, 0x10081004, 0x10080000, 0x10080004, 0x10081000, 0x10081004, 0x00080020, 0x00080024, 0x00081020, 0x00081024, 0x00080020, 0x00080024, 0x00081020, 0x00081024, 0x10080020, 0x10080024, 0x10081020, 0x10081024, 0x10080020, 0x10080024, 0x10081020, 0x10081024, 0x20000000, 0x20000004, 0x20001000, 0x20001004, 0x20000000, 0x20000004, 0x20001000, 0x20001004, 0x30000000, 0x30000004, 0x30001000, 0x30001004, 0x30000000, 0x30000004, 0x30001000, 0x30001004, 0x20000020, 0x20000024, 0x20001020, 0x20001024, 0x20000020, 0x20000024, 0x20001020, 0x20001024, 0x30000020, 0x30000024, 0x30001020, 0x30001024, 0x30000020, 0x30000024, 0x30001020, 0x30001024, 0x20080000, 0x20080004, 0x20081000, 0x20081004, 0x20080000, 0x20080004, 0x20081000, 0x20081004, 0x30080000, 0x30080004, 0x30081000, 0x30081004, 0x30080000, 0x30080004, 0x30081000, 0x30081004, 0x20080020, 0x20080024, 0x20081020, 0x20081024, 0x20080020, 0x20080024, 0x20081020, 0x20081024, 0x30080020, 0x30080024, 0x30081020, 0x30081024, 0x30080020, 0x30080024, 0x30081020, 0x30081024, 0x00000002, 0x00000006, 0x00001002, 0x00001006, 0x00000002, 0x00000006, 0x00001002, 0x00001006, 0x10000002, 0x10000006, 0x10001002, 0x10001006, 0x10000002, 0x10000006, 0x10001002, 0x10001006, 0x00000022, 0x00000026, 0x00001022, 0x00001026, 0x00000022, 0x00000026, 0x00001022, 0x00001026, 0x10000022, 0x10000026, 0x10001022, 0x10001026, 0x10000022, 0x10000026, 0x10001022, 0x10001026, 0x00080002, 0x00080006, 0x00081002, 0x00081006, 0x00080002, 0x00080006, 0x00081002, 0x00081006, 0x10080002, 0x10080006, 0x10081002, 0x10081006, 0x10080002, 0x10080006, 0x10081002, 0x10081006, 0x00080022, 0x00080026, 0x00081022, 0x00081026, 0x00080022, 0x00080026, 0x00081022, 0x00081026, 0x10080022, 0x10080026, 0x10081022, 0x10081026, 0x10080022, 0x10080026, 0x10081022, 0x10081026, 0x20000002, 0x20000006, 0x20001002, 0x20001006, 0x20000002, 0x20000006, 0x20001002, 0x20001006, 0x30000002, 0x30000006, 0x30001002, 0x30001006, 0x30000002, 0x30000006, 0x30001002, 0x30001006, 0x20000022, 0x20000026, 0x20001022, 0x20001026, 0x20000022, 0x20000026, 0x20001022, 0x20001026, 0x30000022, 0x30000026, 0x30001022, 0x30001026, 0x30000022, 0x30000026, 0x30001022, 0x30001026, 0x20080002, 0x20080006, 0x20081002, 0x20081006, 0x20080002, 0x20080006, 0x20081002, 0x20081006, 0x30080002, 0x30080006, 0x30081002, 0x30081006, 0x30080002, 0x30080006, 0x30081002, 0x30081006, 0x20080022, 0x20080026, 0x20081022, 0x20081026, 0x20080022, 0x20080026, 0x20081022, 0x20081026, 0x30080022, 0x30080026, 0x30081022, 0x30081026, 0x30080022, 0x30080026, 0x30081022, 0x30081026 ]; static $pc2mapc4 = [ 0x00000000, 0x00100000, 0x00000008, 0x00100008, 0x00000200, 0x00100200, 0x00000208, 0x00100208, 0x00000000, 0x00100000, 0x00000008, 0x00100008, 0x00000200, 0x00100200, 0x00000208, 0x00100208, 0x04000000, 0x04100000, 0x04000008, 0x04100008, 0x04000200, 0x04100200, 0x04000208, 0x04100208, 0x04000000, 0x04100000, 0x04000008, 0x04100008, 0x04000200, 0x04100200, 0x04000208, 0x04100208, 0x00002000, 0x00102000, 0x00002008, 0x00102008, 0x00002200, 0x00102200, 0x00002208, 0x00102208, 0x00002000, 0x00102000, 0x00002008, 0x00102008, 0x00002200, 0x00102200, 0x00002208, 0x00102208, 0x04002000, 0x04102000, 0x04002008, 0x04102008, 0x04002200, 0x04102200, 0x04002208, 0x04102208, 0x04002000, 0x04102000, 0x04002008, 0x04102008, 0x04002200, 0x04102200, 0x04002208, 0x04102208, 0x00000000, 0x00100000, 0x00000008, 0x00100008, 0x00000200, 0x00100200, 0x00000208, 0x00100208, 0x00000000, 0x00100000, 0x00000008, 0x00100008, 0x00000200, 0x00100200, 0x00000208, 0x00100208, 0x04000000, 0x04100000, 0x04000008, 0x04100008, 0x04000200, 0x04100200, 0x04000208, 0x04100208, 0x04000000, 0x04100000, 0x04000008, 0x04100008, 0x04000200, 0x04100200, 0x04000208, 0x04100208, 0x00002000, 0x00102000, 0x00002008, 0x00102008, 0x00002200, 0x00102200, 0x00002208, 0x00102208, 0x00002000, 0x00102000, 0x00002008, 0x00102008, 0x00002200, 0x00102200, 0x00002208, 0x00102208, 0x04002000, 0x04102000, 0x04002008, 0x04102008, 0x04002200, 0x04102200, 0x04002208, 0x04102208, 0x04002000, 0x04102000, 0x04002008, 0x04102008, 0x04002200, 0x04102200, 0x04002208, 0x04102208, 0x00020000, 0x00120000, 0x00020008, 0x00120008, 0x00020200, 0x00120200, 0x00020208, 0x00120208, 0x00020000, 0x00120000, 0x00020008, 0x00120008, 0x00020200, 0x00120200, 0x00020208, 0x00120208, 0x04020000, 0x04120000, 0x04020008, 0x04120008, 0x04020200, 0x04120200, 0x04020208, 0x04120208, 0x04020000, 0x04120000, 0x04020008, 0x04120008, 0x04020200, 0x04120200, 0x04020208, 0x04120208, 0x00022000, 0x00122000, 0x00022008, 0x00122008, 0x00022200, 0x00122200, 0x00022208, 0x00122208, 0x00022000, 0x00122000, 0x00022008, 0x00122008, 0x00022200, 0x00122200, 0x00022208, 0x00122208, 0x04022000, 0x04122000, 0x04022008, 0x04122008, 0x04022200, 0x04122200, 0x04022208, 0x04122208, 0x04022000, 0x04122000, 0x04022008, 0x04122008, 0x04022200, 0x04122200, 0x04022208, 0x04122208, 0x00020000, 0x00120000, 0x00020008, 0x00120008, 0x00020200, 0x00120200, 0x00020208, 0x00120208, 0x00020000, 0x00120000, 0x00020008, 0x00120008, 0x00020200, 0x00120200, 0x00020208, 0x00120208, 0x04020000, 0x04120000, 0x04020008, 0x04120008, 0x04020200, 0x04120200, 0x04020208, 0x04120208, 0x04020000, 0x04120000, 0x04020008, 0x04120008, 0x04020200, 0x04120200, 0x04020208, 0x04120208, 0x00022000, 0x00122000, 0x00022008, 0x00122008, 0x00022200, 0x00122200, 0x00022208, 0x00122208, 0x00022000, 0x00122000, 0x00022008, 0x00122008, 0x00022200, 0x00122200, 0x00022208, 0x00122208, 0x04022000, 0x04122000, 0x04022008, 0x04122008, 0x04022200, 0x04122200, 0x04022208, 0x04122208, 0x04022000, 0x04122000, 0x04022008, 0x04122008, 0x04022200, 0x04122200, 0x04022208, 0x04122208 ]; static $pc2mapd1 = [ 0x00000000, 0x00000001, 0x08000000, 0x08000001, 0x00200000, 0x00200001, 0x08200000, 0x08200001, 0x00000002, 0x00000003, 0x08000002, 0x08000003, 0x00200002, 0x00200003, 0x08200002, 0x08200003 ]; static $pc2mapd2 = [ 0x00000000, 0x00100000, 0x00000800, 0x00100800, 0x00000000, 0x00100000, 0x00000800, 0x00100800, 0x04000000, 0x04100000, 0x04000800, 0x04100800, 0x04000000, 0x04100000, 0x04000800, 0x04100800, 0x00000004, 0x00100004, 0x00000804, 0x00100804, 0x00000004, 0x00100004, 0x00000804, 0x00100804, 0x04000004, 0x04100004, 0x04000804, 0x04100804, 0x04000004, 0x04100004, 0x04000804, 0x04100804, 0x00000000, 0x00100000, 0x00000800, 0x00100800, 0x00000000, 0x00100000, 0x00000800, 0x00100800, 0x04000000, 0x04100000, 0x04000800, 0x04100800, 0x04000000, 0x04100000, 0x04000800, 0x04100800, 0x00000004, 0x00100004, 0x00000804, 0x00100804, 0x00000004, 0x00100004, 0x00000804, 0x00100804, 0x04000004, 0x04100004, 0x04000804, 0x04100804, 0x04000004, 0x04100004, 0x04000804, 0x04100804, 0x00000200, 0x00100200, 0x00000A00, 0x00100A00, 0x00000200, 0x00100200, 0x00000A00, 0x00100A00, 0x04000200, 0x04100200, 0x04000A00, 0x04100A00, 0x04000200, 0x04100200, 0x04000A00, 0x04100A00, 0x00000204, 0x00100204, 0x00000A04, 0x00100A04, 0x00000204, 0x00100204, 0x00000A04, 0x00100A04, 0x04000204, 0x04100204, 0x04000A04, 0x04100A04, 0x04000204, 0x04100204, 0x04000A04, 0x04100A04, 0x00000200, 0x00100200, 0x00000A00, 0x00100A00, 0x00000200, 0x00100200, 0x00000A00, 0x00100A00, 0x04000200, 0x04100200, 0x04000A00, 0x04100A00, 0x04000200, 0x04100200, 0x04000A00, 0x04100A00, 0x00000204, 0x00100204, 0x00000A04, 0x00100A04, 0x00000204, 0x00100204, 0x00000A04, 0x00100A04, 0x04000204, 0x04100204, 0x04000A04, 0x04100A04, 0x04000204, 0x04100204, 0x04000A04, 0x04100A04, 0x00020000, 0x00120000, 0x00020800, 0x00120800, 0x00020000, 0x00120000, 0x00020800, 0x00120800, 0x04020000, 0x04120000, 0x04020800, 0x04120800, 0x04020000, 0x04120000, 0x04020800, 0x04120800, 0x00020004, 0x00120004, 0x00020804, 0x00120804, 0x00020004, 0x00120004, 0x00020804, 0x00120804, 0x04020004, 0x04120004, 0x04020804, 0x04120804, 0x04020004, 0x04120004, 0x04020804, 0x04120804, 0x00020000, 0x00120000, 0x00020800, 0x00120800, 0x00020000, 0x00120000, 0x00020800, 0x00120800, 0x04020000, 0x04120000, 0x04020800, 0x04120800, 0x04020000, 0x04120000, 0x04020800, 0x04120800, 0x00020004, 0x00120004, 0x00020804, 0x00120804, 0x00020004, 0x00120004, 0x00020804, 0x00120804, 0x04020004, 0x04120004, 0x04020804, 0x04120804, 0x04020004, 0x04120004, 0x04020804, 0x04120804, 0x00020200, 0x00120200, 0x00020A00, 0x00120A00, 0x00020200, 0x00120200, 0x00020A00, 0x00120A00, 0x04020200, 0x04120200, 0x04020A00, 0x04120A00, 0x04020200, 0x04120200, 0x04020A00, 0x04120A00, 0x00020204, 0x00120204, 0x00020A04, 0x00120A04, 0x00020204, 0x00120204, 0x00020A04, 0x00120A04, 0x04020204, 0x04120204, 0x04020A04, 0x04120A04, 0x04020204, 0x04120204, 0x04020A04, 0x04120A04, 0x00020200, 0x00120200, 0x00020A00, 0x00120A00, 0x00020200, 0x00120200, 0x00020A00, 0x00120A00, 0x04020200, 0x04120200, 0x04020A00, 0x04120A00, 0x04020200, 0x04120200, 0x04020A00, 0x04120A00, 0x00020204, 0x00120204, 0x00020A04, 0x00120A04, 0x00020204, 0x00120204, 0x00020A04, 0x00120A04, 0x04020204, 0x04120204, 0x04020A04, 0x04120A04, 0x04020204, 0x04120204, 0x04020A04, 0x04120A04 ]; static $pc2mapd3 = [ 0x00000000, 0x00010000, 0x02000000, 0x02010000, 0x00000020, 0x00010020, 0x02000020, 0x02010020, 0x00040000, 0x00050000, 0x02040000, 0x02050000, 0x00040020, 0x00050020, 0x02040020, 0x02050020, 0x00002000, 0x00012000, 0x02002000, 0x02012000, 0x00002020, 0x00012020, 0x02002020, 0x02012020, 0x00042000, 0x00052000, 0x02042000, 0x02052000, 0x00042020, 0x00052020, 0x02042020, 0x02052020, 0x00000000, 0x00010000, 0x02000000, 0x02010000, 0x00000020, 0x00010020, 0x02000020, 0x02010020, 0x00040000, 0x00050000, 0x02040000, 0x02050000, 0x00040020, 0x00050020, 0x02040020, 0x02050020, 0x00002000, 0x00012000, 0x02002000, 0x02012000, 0x00002020, 0x00012020, 0x02002020, 0x02012020, 0x00042000, 0x00052000, 0x02042000, 0x02052000, 0x00042020, 0x00052020, 0x02042020, 0x02052020, 0x00000010, 0x00010010, 0x02000010, 0x02010010, 0x00000030, 0x00010030, 0x02000030, 0x02010030, 0x00040010, 0x00050010, 0x02040010, 0x02050010, 0x00040030, 0x00050030, 0x02040030, 0x02050030, 0x00002010, 0x00012010, 0x02002010, 0x02012010, 0x00002030, 0x00012030, 0x02002030, 0x02012030, 0x00042010, 0x00052010, 0x02042010, 0x02052010, 0x00042030, 0x00052030, 0x02042030, 0x02052030, 0x00000010, 0x00010010, 0x02000010, 0x02010010, 0x00000030, 0x00010030, 0x02000030, 0x02010030, 0x00040010, 0x00050010, 0x02040010, 0x02050010, 0x00040030, 0x00050030, 0x02040030, 0x02050030, 0x00002010, 0x00012010, 0x02002010, 0x02012010, 0x00002030, 0x00012030, 0x02002030, 0x02012030, 0x00042010, 0x00052010, 0x02042010, 0x02052010, 0x00042030, 0x00052030, 0x02042030, 0x02052030, 0x20000000, 0x20010000, 0x22000000, 0x22010000, 0x20000020, 0x20010020, 0x22000020, 0x22010020, 0x20040000, 0x20050000, 0x22040000, 0x22050000, 0x20040020, 0x20050020, 0x22040020, 0x22050020, 0x20002000, 0x20012000, 0x22002000, 0x22012000, 0x20002020, 0x20012020, 0x22002020, 0x22012020, 0x20042000, 0x20052000, 0x22042000, 0x22052000, 0x20042020, 0x20052020, 0x22042020, 0x22052020, 0x20000000, 0x20010000, 0x22000000, 0x22010000, 0x20000020, 0x20010020, 0x22000020, 0x22010020, 0x20040000, 0x20050000, 0x22040000, 0x22050000, 0x20040020, 0x20050020, 0x22040020, 0x22050020, 0x20002000, 0x20012000, 0x22002000, 0x22012000, 0x20002020, 0x20012020, 0x22002020, 0x22012020, 0x20042000, 0x20052000, 0x22042000, 0x22052000, 0x20042020, 0x20052020, 0x22042020, 0x22052020, 0x20000010, 0x20010010, 0x22000010, 0x22010010, 0x20000030, 0x20010030, 0x22000030, 0x22010030, 0x20040010, 0x20050010, 0x22040010, 0x22050010, 0x20040030, 0x20050030, 0x22040030, 0x22050030, 0x20002010, 0x20012010, 0x22002010, 0x22012010, 0x20002030, 0x20012030, 0x22002030, 0x22012030, 0x20042010, 0x20052010, 0x22042010, 0x22052010, 0x20042030, 0x20052030, 0x22042030, 0x22052030, 0x20000010, 0x20010010, 0x22000010, 0x22010010, 0x20000030, 0x20010030, 0x22000030, 0x22010030, 0x20040010, 0x20050010, 0x22040010, 0x22050010, 0x20040030, 0x20050030, 0x22040030, 0x22050030, 0x20002010, 0x20012010, 0x22002010, 0x22012010, 0x20002030, 0x20012030, 0x22002030, 0x22012030, 0x20042010, 0x20052010, 0x22042010, 0x22052010, 0x20042030, 0x20052030, 0x22042030, 0x22052030 ]; static $pc2mapd4 = [ 0x00000000, 0x00000400, 0x01000000, 0x01000400, 0x00000000, 0x00000400, 0x01000000, 0x01000400, 0x00000100, 0x00000500, 0x01000100, 0x01000500, 0x00000100, 0x00000500, 0x01000100, 0x01000500, 0x10000000, 0x10000400, 0x11000000, 0x11000400, 0x10000000, 0x10000400, 0x11000000, 0x11000400, 0x10000100, 0x10000500, 0x11000100, 0x11000500, 0x10000100, 0x10000500, 0x11000100, 0x11000500, 0x00080000, 0x00080400, 0x01080000, 0x01080400, 0x00080000, 0x00080400, 0x01080000, 0x01080400, 0x00080100, 0x00080500, 0x01080100, 0x01080500, 0x00080100, 0x00080500, 0x01080100, 0x01080500, 0x10080000, 0x10080400, 0x11080000, 0x11080400, 0x10080000, 0x10080400, 0x11080000, 0x11080400, 0x10080100, 0x10080500, 0x11080100, 0x11080500, 0x10080100, 0x10080500, 0x11080100, 0x11080500, 0x00000008, 0x00000408, 0x01000008, 0x01000408, 0x00000008, 0x00000408, 0x01000008, 0x01000408, 0x00000108, 0x00000508, 0x01000108, 0x01000508, 0x00000108, 0x00000508, 0x01000108, 0x01000508, 0x10000008, 0x10000408, 0x11000008, 0x11000408, 0x10000008, 0x10000408, 0x11000008, 0x11000408, 0x10000108, 0x10000508, 0x11000108, 0x11000508, 0x10000108, 0x10000508, 0x11000108, 0x11000508, 0x00080008, 0x00080408, 0x01080008, 0x01080408, 0x00080008, 0x00080408, 0x01080008, 0x01080408, 0x00080108, 0x00080508, 0x01080108, 0x01080508, 0x00080108, 0x00080508, 0x01080108, 0x01080508, 0x10080008, 0x10080408, 0x11080008, 0x11080408, 0x10080008, 0x10080408, 0x11080008, 0x11080408, 0x10080108, 0x10080508, 0x11080108, 0x11080508, 0x10080108, 0x10080508, 0x11080108, 0x11080508, 0x00001000, 0x00001400, 0x01001000, 0x01001400, 0x00001000, 0x00001400, 0x01001000, 0x01001400, 0x00001100, 0x00001500, 0x01001100, 0x01001500, 0x00001100, 0x00001500, 0x01001100, 0x01001500, 0x10001000, 0x10001400, 0x11001000, 0x11001400, 0x10001000, 0x10001400, 0x11001000, 0x11001400, 0x10001100, 0x10001500, 0x11001100, 0x11001500, 0x10001100, 0x10001500, 0x11001100, 0x11001500, 0x00081000, 0x00081400, 0x01081000, 0x01081400, 0x00081000, 0x00081400, 0x01081000, 0x01081400, 0x00081100, 0x00081500, 0x01081100, 0x01081500, 0x00081100, 0x00081500, 0x01081100, 0x01081500, 0x10081000, 0x10081400, 0x11081000, 0x11081400, 0x10081000, 0x10081400, 0x11081000, 0x11081400, 0x10081100, 0x10081500, 0x11081100, 0x11081500, 0x10081100, 0x10081500, 0x11081100, 0x11081500, 0x00001008, 0x00001408, 0x01001008, 0x01001408, 0x00001008, 0x00001408, 0x01001008, 0x01001408, 0x00001108, 0x00001508, 0x01001108, 0x01001508, 0x00001108, 0x00001508, 0x01001108, 0x01001508, 0x10001008, 0x10001408, 0x11001008, 0x11001408, 0x10001008, 0x10001408, 0x11001008, 0x11001408, 0x10001108, 0x10001508, 0x11001108, 0x11001508, 0x10001108, 0x10001508, 0x11001108, 0x11001508, 0x00081008, 0x00081408, 0x01081008, 0x01081408, 0x00081008, 0x00081408, 0x01081008, 0x01081408, 0x00081108, 0x00081508, 0x01081108, 0x01081508, 0x00081108, 0x00081508, 0x01081108, 0x01081508, 0x10081008, 0x10081408, 0x11081008, 0x11081408, 0x10081008, 0x10081408, 0x11081008, 0x11081408, 0x10081108, 0x10081508, 0x11081108, 0x11081508, 0x10081108, 0x10081508, 0x11081108, 0x11081508 ]; $keys = []; for ($des_round = 0; $des_round < $this->des_rounds; ++$des_round) { // pad the key and remove extra characters as appropriate. $key = str_pad(substr($this->key, $des_round * 8, 8), 8, "\0"); // Perform the PC/1 transformation and compute C and D. $t = unpack('Nl/Nr', $key); list($l, $r) = [$t['l'], $t['r']]; $key = (self::$shuffle[$pc1map[ $r & 0xFF]] & "\x80\x80\x80\x80\x80\x80\x80\x00") | (self::$shuffle[$pc1map[($r >> 8) & 0xFF]] & "\x40\x40\x40\x40\x40\x40\x40\x00") | (self::$shuffle[$pc1map[($r >> 16) & 0xFF]] & "\x20\x20\x20\x20\x20\x20\x20\x00") | (self::$shuffle[$pc1map[($r >> 24) & 0xFF]] & "\x10\x10\x10\x10\x10\x10\x10\x00") | (self::$shuffle[$pc1map[ $l & 0xFF]] & "\x08\x08\x08\x08\x08\x08\x08\x00") | (self::$shuffle[$pc1map[($l >> 8) & 0xFF]] & "\x04\x04\x04\x04\x04\x04\x04\x00") | (self::$shuffle[$pc1map[($l >> 16) & 0xFF]] & "\x02\x02\x02\x02\x02\x02\x02\x00") | (self::$shuffle[$pc1map[($l >> 24) & 0xFF]] & "\x01\x01\x01\x01\x01\x01\x01\x00"); $key = unpack('Nc/Nd', $key); $c = ( $key['c'] >> 4) & 0x0FFFFFFF; $d = (($key['d'] >> 4) & 0x0FFFFFF0) | ($key['c'] & 0x0F); $keys[$des_round] = [ self::ENCRYPT => [], self::DECRYPT => array_fill(0, 32, 0) ]; for ($i = 0, $ki = 31; $i < 16; ++$i, $ki -= 2) { $c <<= $shifts[$i]; $c = ($c | ($c >> 28)) & 0x0FFFFFFF; $d <<= $shifts[$i]; $d = ($d | ($d >> 28)) & 0x0FFFFFFF; // Perform the PC-2 transformation. $cp = $pc2mapc1[ $c >> 24 ] | $pc2mapc2[($c >> 16) & 0xFF] | $pc2mapc3[($c >> 8) & 0xFF] | $pc2mapc4[ $c & 0xFF]; $dp = $pc2mapd1[ $d >> 24 ] | $pc2mapd2[($d >> 16) & 0xFF] | $pc2mapd3[($d >> 8) & 0xFF] | $pc2mapd4[ $d & 0xFF]; // Reorder: odd bytes/even bytes. Push the result in key schedule. $val1 = ( $cp & intval(0xFF000000)) | (($cp << 8) & 0x00FF0000) | (($dp >> 16) & 0x0000FF00) | (($dp >> 8) & 0x000000FF); $val2 = (($cp << 8) & intval(0xFF000000)) | (($cp << 16) & 0x00FF0000) | (($dp >> 8) & 0x0000FF00) | ( $dp & 0x000000FF); $keys[$des_round][self::ENCRYPT][ ] = $val1; $keys[$des_round][self::DECRYPT][$ki - 1] = $val1; $keys[$des_round][self::ENCRYPT][ ] = $val2; $keys[$des_round][self::DECRYPT][$ki ] = $val2; } } switch ($this->des_rounds) { case 3: // 3DES keys $this->keys = [ self::ENCRYPT => array_merge( $keys[0][self::ENCRYPT], $keys[1][self::DECRYPT], $keys[2][self::ENCRYPT] ), self::DECRYPT => array_merge( $keys[2][self::DECRYPT], $keys[1][self::ENCRYPT], $keys[0][self::DECRYPT] ) ]; break; // case 1: // DES keys default: $this->keys = [ self::ENCRYPT => $keys[0][self::ENCRYPT], self::DECRYPT => $keys[0][self::DECRYPT] ]; } } /** * Setup the performance-optimized function for de/encrypt() * * @see \phpseclib3\Crypt\Common\SymmetricKey::setupInlineCrypt() */ protected function setupInlineCrypt() { // Engine configuration for: // - DES ($des_rounds == 1) or // - 3DES ($des_rounds == 3) $des_rounds = $this->des_rounds; $init_crypt = 'static $sbox1, $sbox2, $sbox3, $sbox4, $sbox5, $sbox6, $sbox7, $sbox8, $shuffleip, $shuffleinvip; if (!$sbox1) { $sbox1 = array_map("intval", self::$sbox1); $sbox2 = array_map("intval", self::$sbox2); $sbox3 = array_map("intval", self::$sbox3); $sbox4 = array_map("intval", self::$sbox4); $sbox5 = array_map("intval", self::$sbox5); $sbox6 = array_map("intval", self::$sbox6); $sbox7 = array_map("intval", self::$sbox7); $sbox8 = array_map("intval", self::$sbox8);' /* Merge $shuffle with $[inv]ipmap */ . ' for ($i = 0; $i < 256; ++$i) { $shuffleip[] = self::$shuffle[self::$ipmap[$i]]; $shuffleinvip[] = self::$shuffle[self::$invipmap[$i]]; } } '; $k = [ self::ENCRYPT => $this->keys[self::ENCRYPT], self::DECRYPT => $this->keys[self::DECRYPT] ]; $init_encrypt = ''; $init_decrypt = ''; // Creating code for en- and decryption. $crypt_block = []; foreach ([self::ENCRYPT, self::DECRYPT] as $c) { /* Do the initial IP permutation. */ $crypt_block[$c] = ' $in = unpack("N*", $in); $l = $in[1]; $r = $in[2]; $in = unpack("N*", ($shuffleip[ $r & 0xFF] & "\x80\x80\x80\x80\x80\x80\x80\x80") | ($shuffleip[($r >> 8) & 0xFF] & "\x40\x40\x40\x40\x40\x40\x40\x40") | ($shuffleip[($r >> 16) & 0xFF] & "\x20\x20\x20\x20\x20\x20\x20\x20") | ($shuffleip[($r >> 24) & 0xFF] & "\x10\x10\x10\x10\x10\x10\x10\x10") | ($shuffleip[ $l & 0xFF] & "\x08\x08\x08\x08\x08\x08\x08\x08") | ($shuffleip[($l >> 8) & 0xFF] & "\x04\x04\x04\x04\x04\x04\x04\x04") | ($shuffleip[($l >> 16) & 0xFF] & "\x02\x02\x02\x02\x02\x02\x02\x02") | ($shuffleip[($l >> 24) & 0xFF] & "\x01\x01\x01\x01\x01\x01\x01\x01") ); ' . /* Extract L0 and R0 */ ' $l = $in[1]; $r = $in[2]; '; $l = '$l'; $r = '$r'; // Perform DES or 3DES. for ($ki = -1, $des_round = 0; $des_round < $des_rounds; ++$des_round) { // Perform the 16 steps. for ($i = 0; $i < 16; ++$i) { // start of "the Feistel (F) function" - see the following URL: // http://en.wikipedia.org/wiki/Image:Data_Encryption_Standard_InfoBox_Diagram.png // Merge key schedule. $crypt_block[$c] .= ' $b1 = ((' . $r . ' >> 3) & 0x1FFFFFFF) ^ (' . $r . ' << 29) ^ ' . $k[$c][++$ki] . '; $b2 = ((' . $r . ' >> 31) & 0x00000001) ^ (' . $r . ' << 1) ^ ' . $k[$c][++$ki] . ';' . /* S-box indexing. */ $l . ' = $sbox1[($b1 >> 24) & 0x3F] ^ $sbox2[($b2 >> 24) & 0x3F] ^ $sbox3[($b1 >> 16) & 0x3F] ^ $sbox4[($b2 >> 16) & 0x3F] ^ $sbox5[($b1 >> 8) & 0x3F] ^ $sbox6[($b2 >> 8) & 0x3F] ^ $sbox7[ $b1 & 0x3F] ^ $sbox8[ $b2 & 0x3F] ^ ' . $l . '; '; // end of "the Feistel (F) function" // swap L & R list($l, $r) = [$r, $l]; } list($l, $r) = [$r, $l]; } // Perform the inverse IP permutation. $crypt_block[$c] .= '$in = ($shuffleinvip[($l >> 24) & 0xFF] & "\x80\x80\x80\x80\x80\x80\x80\x80") | ($shuffleinvip[($r >> 24) & 0xFF] & "\x40\x40\x40\x40\x40\x40\x40\x40") | ($shuffleinvip[($l >> 16) & 0xFF] & "\x20\x20\x20\x20\x20\x20\x20\x20") | ($shuffleinvip[($r >> 16) & 0xFF] & "\x10\x10\x10\x10\x10\x10\x10\x10") | ($shuffleinvip[($l >> 8) & 0xFF] & "\x08\x08\x08\x08\x08\x08\x08\x08") | ($shuffleinvip[($r >> 8) & 0xFF] & "\x04\x04\x04\x04\x04\x04\x04\x04") | ($shuffleinvip[ $l & 0xFF] & "\x02\x02\x02\x02\x02\x02\x02\x02") | ($shuffleinvip[ $r & 0xFF] & "\x01\x01\x01\x01\x01\x01\x01\x01"); '; } // Creates the inline-crypt function $this->inline_crypt = $this->createInlineCryptFunction( [ 'init_crypt' => $init_crypt, 'init_encrypt' => $init_encrypt, 'init_decrypt' => $init_decrypt, 'encrypt_block' => $crypt_block[self::ENCRYPT], 'decrypt_block' => $crypt_block[self::DECRYPT] ] ); } }

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