;
                    this.inLen = 0;
                }
            }
        };

        var finalize = function () {
            var padding = this.doPadding();
            this.update(padding);
            var result = this.getDigest();
            this.reset();
            return result;
        };

        var engine = (function () {
            if (!Constructor) {
                throw "Unsupported algorithm: " + Constructor.toString();
            }
            Constructor.prototype.update = update;
