本文整理汇总了PHP中Crypt_Rijndael::get_lambda_functions方法的典型用法代码示例。如果您正苦于以下问题：PHP Crypt_Rijndael::get_lambda_functions方法的具体用法？PHP Crypt_Rijndael::get_lambda_functions怎么用？PHP Crypt_Rijndael::get_lambda_functions使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Crypt_Rijndael的用法示例。
在下文中一共展示了Crypt_Rijndael::get_lambda_functions方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的PHP代码示例。
示例1: inline_crypt_setup
/**
* Creates performance-optimized function for de/encrypt(), storing it in $this->inline_crypt
*
* @see Crypt_Rijndael::encrypt()
* @see Crypt_Rijndael::decrypt()
* @access private
*/
function inline_crypt_setup()
{
// Note: inline_crypt_setup() will be called only if $this->changed === true
// So here we are'nt under the same heavy timing-stress as we are in _de/encryptBlock() or de/encrypt().
// However...the here generated function- $code, stored as php callback in $this->inline_crypt, must work as fast as even possible.
$lambda_functions =& Crypt_Rijndael::get_lambda_functions();
$block_size = $this->block_size;
$mode = $this->mode;
// The first 5 generated $lambda_functions will use the key-words hardcoded for better performance.
// For memory reason we limit those ultra-optimized function code to 5.
// After that, we use pure (extracted) integer vars for the key-words which is faster than accessing them via array.
if (count($lambda_functions) < 5) {
$w = $this->w;
$dw = $this->dw;
$init_encryptBlock = '';
$init_decryptBlock = '';
} else {
for ($i = 0, $cw = count($this->w); $i < $cw; ++$i) {
$w[] = '$w_' . $i;
$dw[] = '$dw_' . $i;
}
$init_encryptBlock = 'extract($self->w, EXTR_PREFIX_ALL, "w");';
$init_decryptBlock = 'extract($self->dw, EXTR_PREFIX_ALL, "dw");';
}
$code_hash = md5("{$mode}, {$block_size}, " . implode(',', $w));
if (!isset($lambda_functions[$code_hash])) {
$Nr = $this->Nr;
$Nb = $this->Nb;
$c = $this->c;
// Generating encrypt code:
$init_encryptBlock .= '
$t0 = $self->t0;
$t1 = $self->t1;
$t2 = $self->t2;
$t3 = $self->t3;
$sbox = $self->sbox;';
$s = 'e';
$e = 's';
$wc = $Nb - 1;
// Preround: addRoundKey
$_encryptBlock = '$in = unpack("N*", $in);' . "\n";
for ($i = 0; $i < $Nb; ++$i) {
$_encryptBlock .= '$s' . $i . ' = $in[' . ($i + 1) . '] ^ ' . $w[++$wc] . ";\n";
}
// Mainrounds: shiftRows + subWord + mixColumns + addRoundKey
for ($round = 1; $round < $Nr; ++$round) {
list($s, $e) = array($e, $s);
for ($i = 0; $i < $Nb; ++$i) {
$_encryptBlock .= '$' . $e . $i . ' =
$t0[($' . $s . $i . ' >> 24) & 0xff] ^
$t1[($' . $s . ($i + $c[1]) % $Nb . ' >> 16) & 0xff] ^
$t2[($' . $s . ($i + $c[2]) % $Nb . ' >> 8) & 0xff] ^
$t3[ $' . $s . ($i + $c[3]) % $Nb . ' & 0xff] ^
' . $w[++$wc] . ";\n";
}
}
// Finalround: subWord + shiftRows + addRoundKey
for ($i = 0; $i < $Nb; ++$i) {
$_encryptBlock .= '$' . $e . $i . ' =
$sbox[ $' . $e . $i . ' & 0xff] |
($sbox[($' . $e . $i . ' >> 8) & 0xff] << 8) |
($sbox[($' . $e . $i . ' >> 16) & 0xff] << 16) |
($sbox[($' . $e . $i . ' >> 24) & 0xff] << 24);' . "\n";
}
$_encryptBlock .= '$in = pack("N*"' . "\n";
for ($i = 0; $i < $Nb; ++$i) {
$_encryptBlock .= ',
($' . $e . $i . ' & 0xFF000000) ^
($' . $e . ($i + $c[1]) % $Nb . ' & 0x00FF0000) ^
($' . $e . ($i + $c[2]) % $Nb . ' & 0x0000FF00) ^
($' . $e . ($i + $c[3]) % $Nb . ' & 0x000000FF) ^
' . $w[$i] . "\n";
}
$_encryptBlock .= ');';
//.........这里部分代码省略.........