| /** |
| * 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.geronimo.microprofile.extensions.config.converter.secure; |
| |
| import java.io.BufferedInputStream; |
| import java.io.BufferedOutputStream; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.nio.file.Files; |
| import java.nio.file.Paths; |
| import java.security.SecureRandom; |
| import java.util.Random; |
| import java.util.stream.IntStream; |
| |
| class MasterKey { |
| |
| private static final int SIZE = |
| Integer.getInteger("geronimo.microprofile.extensions.config.converter.secure.master_key.size", 2 * 1024 * 1024); |
| |
| private MasterKey() { |
| // no-op |
| } |
| |
| static void write(final String location, final String masterKey) { |
| final byte[] key = masterKey.getBytes(StandardCharsets.UTF_8); |
| |
| try (final DataOutputStream stream = |
| new DataOutputStream(new BufferedOutputStream(Files.newOutputStream(Paths.get(location))))) { |
| final int[] indices = new int[key.length]; |
| final byte[] data = new byte[SIZE]; |
| |
| final SecureRandom secureRandom = new SecureRandom(); |
| new Random(System.currentTimeMillis()).nextBytes(data); |
| for (int i = 0; i < key.length; i++) { |
| final int index = secureRandom.nextInt(SIZE); |
| indices[i] = index; |
| data[index] = key[i]; |
| } |
| stream.writeInt(key.length); |
| for (final int keyByte : indices) { |
| stream.writeInt(keyByte); |
| } |
| stream.write(data); |
| final byte[] footer = new byte[secureRandom.nextInt(key.length)]; |
| secureRandom.nextBytes(footer); |
| stream.write(footer); |
| } catch (final IOException e) { |
| throw new IllegalArgumentException(e); |
| } |
| } |
| |
| static byte[] read(final String location) { |
| try (final DataInputStream in = |
| new DataInputStream(new BufferedInputStream(Files.newInputStream(Paths.get(location))))) { |
| final int len = in.readInt(); |
| final byte[] masterKey = new byte[len]; |
| final int[] keyIndices = new int[len]; |
| for (int i = 0; i < len; i++) { |
| keyIndices[i] = in.readInt(); |
| } |
| |
| final int maxIdx = IntStream.of(keyIndices).max().orElse(0) + 1; |
| final byte[] data = new byte[maxIdx]; |
| final int nbRead = in.read(data); |
| if (nbRead != maxIdx) { |
| throw new IllegalStateException("Corrupted master_key: '" + location + "'"); |
| } |
| for (int i = 0; i < masterKey.length; i++) { |
| masterKey[i] = data[keyIndices[i]]; |
| } |
| return masterKey; |
| } catch (final IOException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| } |