| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.pirk.querier.wideskies.encrypt; |
| |
| import java.math.BigInteger; |
| import java.util.Map; |
| import java.util.SortedMap; |
| import java.util.TreeMap; |
| import java.util.concurrent.Callable; |
| |
| import org.apache.pirk.encryption.Paillier; |
| import org.apache.pirk.utils.PIRException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Runnable class for multithreaded PIR encryption |
| */ |
| class EncryptQueryTask implements Callable<SortedMap<Integer,BigInteger>> |
| { |
| private static final Logger logger = LoggerFactory.getLogger(EncryptQueryTask.class); |
| |
| private final int dataPartitionBitSize; |
| private final int start; // start of computing range for the runnable |
| private final int stop; // stop, inclusive, of the computing range for the runnable |
| |
| private final Paillier paillier; |
| private final Map<Integer,Integer> selectorQueryVecMapping; |
| |
| public EncryptQueryTask(int dataPartitionBitSizeInput, Paillier paillierInput, Map<Integer,Integer> selectorQueryVecMappingInput, int startInput, |
| int stopInput) |
| { |
| dataPartitionBitSize = dataPartitionBitSizeInput; |
| |
| paillier = paillierInput; |
| selectorQueryVecMapping = selectorQueryVecMappingInput; |
| |
| start = startInput; |
| stop = stopInput; |
| } |
| |
| @Override |
| public SortedMap<Integer,BigInteger> call() throws PIRException |
| { |
| // holds the ordered encrypted values to pull after thread computation is complete |
| SortedMap<Integer,BigInteger> encryptedValues = new TreeMap<>(); |
| for (int i = start; i <= stop; i++) |
| { |
| Integer selectorNum = selectorQueryVecMapping.get(i); |
| BigInteger valToEnc = (selectorNum == null) ? BigInteger.ZERO : (BigInteger.valueOf(2)).pow(selectorNum * dataPartitionBitSize); |
| BigInteger encVal = paillier.encrypt(valToEnc); |
| encryptedValues.put(i, encVal); |
| logger.debug("selectorNum = " + selectorNum + " valToEnc = " + valToEnc + " envVal = " + encVal); |
| } |
| |
| return encryptedValues; |
| } |
| } |