"); echo ("0x".bcdechex(1234567890)."h=".bchexdec( bcdechex(1234567890))); $xx=bcadd( bcmul($nBigNumber,$startIteration) , $outBigNumber); $count=$startIteration; echo("

". "
Max Hex : ".$maxPossibleFlag. "
Max Dec : ".$maxPossibleDec. "
original n : ".$nBigNumber. "
original output : ".$outBigNumber. "
ln1511 : ".$ln1511. "

"); while (true) { // debug // ($xx<=$maxPossibleDec) { // xx could not be more than maxPossibleDec //$pow1511X1=bcpow(1511,$xx,5); //$pow1511X2=bcpow(1511,$xx,6); $logXX=log($xx); $div=$logXX/$ln1511; $mod=fmod($logXX,$ln1511); $tK = testKey($xx,$nBigNumber); $hexXX = bcdechex($xx); echo ( "
T(" . $count . "):" . //debug "
X =" . $xx. "
TRes=" . $tK . "
HexX=" . $hexXX . //"
1511^X.1=" .$pow1511X1. //"
1511^X.2=" .$pow1511X2. "
logX=".$logXX. "
div=".$div. "
mod=".$mod. //"
diffOk=".$diffOk. "
"); // debug if ($mod <= $diffOk) { echo ("
Mod result less than allowed diff:
".$mod."<".$diffOk."
"); if ($outBigNumber==$tK) { $xhex = bcdechex ($xx); // password echo ("
Pass in dec:" . $xx); // = 3318129336095936218088426353755483295985 echo ("
Pass in hex:" . $xhex); // = 9c04876fb689790317c6b17092edc50f1 break; } else { echo ("
Collision passw: ".$hexXX."
". "Collision test: ". testHexKey($hexXX, $nBigNumber). "

"); } } if ($count==5) { $count+=$bigStep; $xx=bcadd($xx, bcmul($nBigNumber,$bigStep)); } $count += 1; $xx=bcadd($xx,$nBigNumber); } if ($xhex=="") { echo("

Next value is more than MaxPossible:
".bcadd($xx,$nBigNumber)); echo ("
No password found.. "); } function testHexKey($f,$n){ return bcpowmod(1511, bchexdec($f), $n); } function testKey($test,$n) { return bcpowmod(1511,$test, $n); } function bcdechex($dec) { $hex=""; while ($dec>1) { $mod = bcmod ($dec ,16); $hex = getHex($mod) . $hex ; $dec = bcdiv ($dec ,16); } return $hex; } function getHex ($d) { if (($d>=0) && ($d <10)) return $d; if ($d==10) return "a"; if ($d==11) return "b"; if ($d==12) return "c"; if ($d==13) return "d"; if ($d==14) return "e"; if ($d==15) return "f"; } ?>

php hack the server challenge