/** * Setup the performance-optimized function for de/encrypt() * * @see Crypt_Base::_setupInlineCrypt() * @access private */ function _setupInlineCrypt() { $lambda_functions =& Crypt_Blowfish::_getLambdaFunctions(); // We create max. 10 hi-optimized code for memory reason. Means: For each $key one ultra fast inline-crypt function. // After that, we'll still create very fast optimized code but not the hi-ultimative code, for each $mode one. $gen_hi_opt_code = (bool) (count($lambda_functions) < 10); switch (true) { case $gen_hi_opt_code: $code_hash = md5(str_pad("Crypt_Blowfish, {$this->mode}, ", 32, "") . $this->key); break; default: $code_hash = "Crypt_Blowfish, {$this->mode}"; } if (!isset($lambda_functions[$code_hash])) { switch (true) { case $gen_hi_opt_code: $p = $this->bctx['p']; $init_crypt = ' static $sb_0, $sb_1, $sb_2, $sb_3; if (!$sb_0) { $sb_0 = $self->bctx["sb"][0]; $sb_1 = $self->bctx["sb"][1]; $sb_2 = $self->bctx["sb"][2]; $sb_3 = $self->bctx["sb"][3]; } '; break; default: $p = array(); for ($i = 0; $i < 18; ++$i) { $p[] = '$p_' . $i; } $init_crypt = ' list($sb_0, $sb_1, $sb_2, $sb_3) = $self->bctx["sb"]; list(' . implode(',', $p) . ') = $self->bctx["p"]; '; } // Generating encrypt code: $encrypt_block = ' $in = unpack("N*", $in); $l = $in[1]; $r = $in[2]; '; for ($i = 0; $i < 16; $i += 2) { $encrypt_block .= ' $l^= ' . $p[$i] . '; $r^= ($sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff] ^ $sb_2[$l >> 8 & 0xff]) + $sb_3[$l & 0xff]; $r^= ' . $p[$i + 1] . '; $l^= ($sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff] ^ $sb_2[$r >> 8 & 0xff]) + $sb_3[$r & 0xff]; '; } $encrypt_block .= ' $in = pack("N*", $r ^ ' . $p[17] . ', $l ^ ' . $p[16] . ' ); '; // Generating decrypt code: $decrypt_block = ' $in = unpack("N*", $in); $l = $in[1]; $r = $in[2]; '; for ($i = 17; $i > 2; $i -= 2) { $decrypt_block .= ' $l^= ' . $p[$i] . '; $r^= ($sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff] ^ $sb_2[$l >> 8 & 0xff]) + $sb_3[$l & 0xff]; $r^= ' . $p[$i - 1] . '; $l^= ($sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff] ^ $sb_2[$r >> 8 & 0xff]) + $sb_3[$r & 0xff]; '; } $decrypt_block .= ' $in = pack("N*", $r ^ ' . $p[0] . ', $l ^ ' . $p[1] . ' ); '; $lambda_functions[$code_hash] = $this->_createInlineCryptFunction(array('init_crypt' => $init_crypt, 'init_encrypt' => '', 'init_decrypt' => '', 'encrypt_block' => $encrypt_block, 'decrypt_block' => $decrypt_block)); } $this->inline_crypt = $lambda_functions[$code_hash]; }
/** * Setup the performance-optimized function for de/encrypt() * * @see Crypt_Base::_setupInlineCrypt() * @access private */ function _setupInlineCrypt() { $lambda_functions =& Crypt_Blowfish::_getLambdaFunctions(); // We create max. 10 hi-optimized code for memory reason. Means: For each $key one ultra fast inline-crypt function. // (Currently, for Crypt_Blowfish, one generated $lambda_function cost on php5.5@32bit ~100kb unfreeable mem and ~180kb on php5.5@64bit) // After that, we'll still create very fast optimized code but not the hi-ultimative code, for each $mode one. $gen_hi_opt_code = (bool) (count($lambda_functions) < 10); // Generation of a unique hash for our generated code $code_hash = "Crypt_Blowfish, {$this->mode}"; if ($gen_hi_opt_code) { $code_hash = str_pad($code_hash, 32) . $this->_hashInlineCryptFunction($this->key); } // on 32-bit linux systems with PHP < 5.3 float to integer conversion is bad switch (true) { case defined('PHP_INT_SIZE') && PHP_INT_SIZE == 8: case version_compare(PHP_VERSION, '5.3.0') >= 0: case (PHP_OS & "ßßß") === 'WIN': $safeint = '%s'; break; default: $safeint = '(is_int($temp = %s) ? $temp : (fmod($temp, 0x80000000) & 0x7FFFFFFF) | '; $safeint .= '((fmod(floor($temp / 0x80000000), 2) & 1) << 31))'; } if (!isset($lambda_functions[$code_hash])) { switch (true) { case $gen_hi_opt_code: $p = $this->bctx['p']; $init_crypt = ' static $sb_0, $sb_1, $sb_2, $sb_3; if (!$sb_0) { $sb_0 = $self->bctx["sb"][0]; $sb_1 = $self->bctx["sb"][1]; $sb_2 = $self->bctx["sb"][2]; $sb_3 = $self->bctx["sb"][3]; } '; break; default: $p = array(); for ($i = 0; $i < 18; ++$i) { $p[] = '$p_' . $i; } $init_crypt = ' list($sb_0, $sb_1, $sb_2, $sb_3) = $self->bctx["sb"]; list(' . implode(',', $p) . ') = $self->bctx["p"]; '; } // Generating encrypt code: $encrypt_block = ' $in = unpack("N*", $in); $l = $in[1]; $r = $in[2]; '; for ($i = 0; $i < 16; $i += 2) { $encrypt_block .= ' $l^= ' . $p[$i] . '; $r^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]') . ' ^ $sb_2[$l >> 8 & 0xff]) + $sb_3[$l & 0xff]') . '; $r^= ' . $p[$i + 1] . '; $l^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]') . ' ^ $sb_2[$r >> 8 & 0xff]) + $sb_3[$r & 0xff]') . '; '; } $encrypt_block .= ' $in = pack("N*", $r ^ ' . $p[17] . ', $l ^ ' . $p[16] . ' ); '; // Generating decrypt code: $decrypt_block = ' $in = unpack("N*", $in); $l = $in[1]; $r = $in[2]; '; for ($i = 17; $i > 2; $i -= 2) { $decrypt_block .= ' $l^= ' . $p[$i] . '; $r^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]') . ' ^ $sb_2[$l >> 8 & 0xff]) + $sb_3[$l & 0xff]') . '; $r^= ' . $p[$i - 1] . '; $l^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]') . ' ^ $sb_2[$r >> 8 & 0xff]) + $sb_3[$r & 0xff]') . '; '; } $decrypt_block .= ' $in = pack("N*", $r ^ ' . $p[0] . ', $l ^ ' . $p[1] . ' ); '; $lambda_functions[$code_hash] = $this->_createInlineCryptFunction(array('init_crypt' => $init_crypt, 'init_encrypt' => '', 'init_decrypt' => '', 'encrypt_block' => $encrypt_block, 'decrypt_block' => $decrypt_block)); } $this->inline_crypt = $lambda_functions[$code_hash]; }