enc_string RJContextEncode(JNIEnv* je, RJContext& context, const std::string& input) {
	std::string in_v = input;
	unsigned int sum_v = HashSum((const signed char*)in_v.data(), in_v.size());
	out_oscar_buffer bs;
	bs << DWORD_LE(sum_v);
	in_v.append(bs.as_string());

	enc_string r;
	unsigned char* b = (unsigned char*) alloca(in_v.size() + 16);
	memcpy(b, in_v.data(), in_v.size());
	int len = in_v.size();
	if (len % 16) {
		len += 16 - (len % 16);
	}
	if (len % 16) {
		logd(TAG, "RJContextEncode fail: if(len%16)");
		return enc_string(); //throw ("if(len%16)");
	} else if (input.size() == 0) {
		logd(TAG, "RJContextEncode fail: buffer length == 0");
		return enc_string();
	} else {
		unsigned char* output = (unsigned char*) alloca(len);
		block_encrypt(&(context.rjctx_out), b, len,output, context.rjIV_out);
		r.buf = std::string((char*)output, len);
		r.original_size = input.size();
		log(je, TAG, "RJContextEncode r.buf.size()=%d", r.buf.size());
		return r;
	}
}