hashes.js
function rstr(s, utf8) {
        s = (utf8) ? utf8Encode(s) : s;
        return binb2rstr(binb(rstr2binb(s), s.length * 8));
      }
function rstr(s, utf8) {
        s = (utf8) ? utf8Encode(s) : s;
        return binb2rstr(binb(rstr2binb(s), s.length * 8));
      }
function rstr ( s , utf8 ) { s = ( utf8 ) ? utf8Encode ( s ) : s ; return binb2rstr ( binb ( rstr2binb ( s ) , s . length * 8 ) ) ; }
private methods 
Calculate the SHA-512 of a raw string
private methods Calculate the SHA - 512 of a raw string