count += len;                                        // update number of bytes
        int partLen = BLOCK_LENGTH - bufferNdx;
        int i = 0;
        if (len >= partLen) {
            System.arraycopy(input, offset, buffer, bufferNdx, partLen);


            transform(buffer, 0);

            for (i = partLen; i + BLOCK_LENGTH - 1 < len; i+= BLOCK_LENGTH)
                transform(input, offset + i);