PHP获取PR值的代码(2)

$b -= $c;$b = trunkbitForce32bit($b);

$b -= $a;$b = trunkbitForce32bit($b);

$b = bigxor($b,trunkbitForce32bit($a<<16));

$c -= $a; $c = trunkbitForce32bit($c);

$c -= $b; $c = trunkbitForce32bit($c);

$c = bigxor($c,(zeroFill($b,5))); $c = trunkbitForce32bit($c);

$a -= $b;$a = trunkbitForce32bit($a);

$a -= $c;$a = trunkbitForce32bit($a);

$a = bigxor($a,(zeroFill($c,3)));$a = trunkbitForce32bit($a);

$b -= $c;$b = trunkbitForce32bit($b);

$b -= $a;$b = trunkbitForce32bit($b);

$b = bigxor($b,trunkbitForce32bit($a<<10));

$c -= $a; $c = trunkbitForce32bit($c);

$c -= $b; $c = trunkbitForce32bit($c);

$c = bigxor($c,(zeroFill($b,15))); $c = trunkbitForce32bit($c);

return array($a,$b,$c);

}

function NewGCH($ch){

$ch = ( trunkbitForce32bit( ( $ch / 7 ) << 2 ) |

( ( myfmod( $ch,13 ) ) & 7 ) );

$prbuf = array();

$prbuf[0] = $ch;

for( $i = 1; $i < 20; $i++ )

{

$prbuf[$i] = $prbuf[$i-1] - 9;

}

$ch = GCH( c32to8bit( $prbuf ) );

return $ch;

}

function myfmod($x,$y){

$i = floor( $x / $y );

return ( $x - $i * $y );

}

function c32to8bit($arr32){

$arr8 = array();

for( $i = 0; $i < count($arr32); $i++ ) {

for( $bitOrder = $i * 4;

$bitOrder <= $i * 4 + 3; $bitOrder++ ) {

$arr8[$bitOrder] = $arr32[$i] & 255;

$arr32[$i] = zeroFill( $arr32[$i], 8 );

}

}

return $arr8;

}

function GCH($url, $length=null){

if(is_null($length)) {

$length = sizeof($url);

}

$init = 0xE6359A60;

$a = 0x9E3779B9;

$b = 0x9E3779B9;

$c = 0xE6359A60;

$k = 0;

$len = $length;

$mixo = array();

while( $len >= 12 ){

$a += ($url[$k+0] +trunkbitForce32bit($url[$k+1]<<8)

+trunkbitForce32bit($url[$k+2]<<16)

+trunkbitForce32bit($url[$k+3]<<24));

$b += ($url[$k+4] +trunkbitForce32bit($url[$k+5]<<8)

+trunkbitForce32bit($url[$k+6]<<16)

+trunkbitForce32bit($url[$k+7]<<24));

$c += ($url[$k+8] +trunkbitForce32bit($url[$k+9]<<8)

+trunkbitForce32bit($url[$k+10]<<16)

+trunkbitForce32bit($url[$k+11]<<24));

$mixo = mix($a,$b,$c);

$a = $mixo[0]; $b = $mixo[1]; $c = $mixo[2];

$k += 12;

$len -= 12;

}

$c += $length;

switch( $len ) {

case 11:

$c += trunkbitForce32bit($url[$k+10]<<24);

case 10:

$c+=trunkbitForce32bit($url[$k+9]<<16);

case 9 :

$c+=trunkbitForce32bit($url[$k+8]<<8);

case 8 :

$b+=trunkbitForce32bit($url[$k+7]<<24);

case 7 :

$b+=trunkbitForce32bit($url[$k+6]<<16);