dstIndex += writeAndXWireFormat(dst, dstIndex);
        this.length = dstIndex - start;

        if ( this.digest != null ) {
            this.digest.sign(dst, this.headerStart, this.length, this, this.getResponse());
        }

        return this.length;
    }


    /*
     * We overload this because we want readAndXWireFormat to
     * read the parameter words and bytes. This is so when