Android Question help to convert php code to b4a

[group45]

hello everyone
i am working with rsa in php and b4a
php is ok. but i don't know how to convert below php codes to b4a

public function decrypt ($c, $d, $n) {
        $coded   = explode('.', $c);
        $message = '';
        $max     = count($coded);

        for($i=0; $i<$max; $i++){
            $code = bcpowmod($coded[$i], $d, $n);
            
            while(bccomp($code, '0') != 0){
                $ascii    = bcmod($code, '256');
                $code     = bcdiv($code, '256', 0);
                $message .= chr($ascii);
            }
        }

        return $message;
    }

my code in b4a is

Dim txt As String="71 71"
    Dim d As BigInteger:d.Initialize(29)
    Dim n As BigInteger:n.Initialize(91)
    Dim e As BigInteger:e.Initialize(5)
    Dim asci As BigInteger:asci.Initialize(256)   
    Dim spl() As String= Regex.Split(" ",txt)
    txt=""
    For i=0 To spl.Length-1
        Dim temp As BigInteger:temp.Initialize(spl(i))   
        LogColor(temp.ToString,Colors.Green)
        temp.Pow(d)
        LogColor(temp.ToString,Colors.LightGray)
        temp.Mod(n)
        LogColor(temp.ToString,Colors.Red)
        Do While temp.ToString<>"0"
            Dim ascii As Int=temp.Mod(asci)
            temp.Divide(asci)
            LogColor(temp.ToString,Colors.Red)
            txt=txt&Chr(ascii)
        Loop       
    Next
    LogColor(txt,Colors.Blue)

at last txt is empty
thanks...

 

[Erel]

Post the logs.