hlenc

void hldec(unsigned char *buff, unsigned int pcksz) {
    #define HL_NTOHL(x)  \
       ((((x) & 0xff000000) >> 24) | \
        (((x) & 0x00ff0000) >>  8) | \
        (((x) & 0x0000ff00) <<  8) | \
        (((x) & 0x000000ff) << 24))

    const static unsigned char  hlhash[] =
                    "\x05\x61\x7A\xED\x1B\xCA\x0D\x9B\x4A\xF1\x64\xC7\xB5\x8E\xDF\xA0";
    unsigned char   *ptrebpc;
    unsigned int   *lbuff = (unsigned int *)buff,
                    pcknum,
                    invnum,
                    ebpc;
    int             cont,
                    i;

    if(pcksz < 9) return;
    pcknum = *buff;
    invnum = ~pcknum;
    pcksz = (pcksz - 8) >> 2;
    lbuff += 2;
    cont = 0;

    while(pcksz--) {
        ebpc = *lbuff ^ pcknum;

        ptrebpc = (unsigned char *)&ebpc;
        for(i = 0; i < 4; i++) {
            *ptrebpc ^= (((hlhash[(cont + i) & 0xf] | (i << i)) | i) | 0xA5);
            ptrebpc++;
        }

        *lbuff = HL_NTOHL(ebpc) ^ invnum;
        lbuff++;
        cont++;
    }
}

int main()
{
    unsigned char msg[] = "\x02\x00\x00\xc0\x01\x00\x00\x80Y\x18\x01\x03\x99\x00\x10Bg\x19@\x020/x!\x0fQ\x0b`2\r\x18Zp\x14CG+tePfkup(8=bq|%\x10n+5ph7n+7 ?6kv<q6-tl*6ie/2*- %q2~/sy6s5,~#%\"4.y,+wnw(gb,9(\'p\x11\x18Jwt\'3 <3e,>s5`f69,1?~wbwr,)0\'p5\n\x00";
    printf("ds", strlen(msg)
    hldec(msg, 148);
    unsigned char* mmm = msg;
    printf("hello");
    printf("%s here",mmm);
    return 0;
}




    <?php

        function HL_NTOHL($x)
        {
            return ((($x) & 0xff000000) >> 24) | ((($x) & 0x00ff0000) >>  8) | ((($x) & 0x0000ff00) <<  8) | ((($x) & 0x000000ff) << 24);
        }

        function pre_hldec($str)
        {
            hldec(str_split($str), strlen($str), $str);
        }

        function int_to_byte_array($int)
        {
            return unpack("c*", pack("l", $int));
        }

      function hldec($buff, $pcksz, $bin_str)
      {
              $hlhash =
                        "\x05\x61\x7A\xED\x1B\xCA\x0D\x9B\x4A\xF1\x64\xC7\xB5\x8E\xDF\xA0";
        $lbuff = unpack("l*", $bin_str);

        if($pcksz < 9) return;
        $pcknum = $buff[1];
        $invnum = ~$pcknum;
        $pcksz = ($pcksz - 8) >> 2;
        $ilbuff = 3;
        $cont = 0;

        while($pcksz--) {
            $ebpc = $lbuff[$ilbuff] ^ $pcknum;

            $ptrebpc = int_to_byte_array($ebpc);
            for($i = 1; $i <= 4; $i++) {
                $ptrebpc[$i] ^= ((($hlhash[($cont + $i) & 0xf] | ($i << $i)) | $i) | 0xA5);
            }

            $lbuff[$ilbuff] = HL_NTOHL($ebpc) ^ $invnum;
            $ilbuff++;
            $cont++;
        }

        return pack("l*", $lbuff);
      }

      echo hldec("DeadBeafDeadBeaf");
    ?>