| /* |
| * 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.bookkeeper.proto.checksum; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.ByteBufAllocator; |
| |
| import java.security.GeneralSecurityException; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.util.Arrays; |
| import javax.crypto.Mac; |
| import javax.crypto.spec.SecretKeySpec; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A {@code SHA-1} based digest manager. |
| * |
| * <p>NOTE: This class is tended to be used by this project only. External users should not rely on it directly. |
| */ |
| public class MacDigestManager extends DigestManager { |
| private static final Logger LOG = LoggerFactory.getLogger(MacDigestManager.class); |
| |
| public static final String DIGEST_ALGORITHM = "SHA-1"; |
| public static final String KEY_ALGORITHM = "HmacSHA1"; |
| |
| public static final int MAC_CODE_LENGTH = 20; |
| |
| final byte[] passwd; |
| |
| static final byte[] EMPTY_LEDGER_KEY; |
| static { |
| try { |
| EMPTY_LEDGER_KEY = MacDigestManager.genDigest("ledger", new byte[0]); |
| } catch (NoSuchAlgorithmException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| private final ThreadLocal<Mac> mac = new ThreadLocal<Mac>() { |
| @Override |
| protected Mac initialValue() { |
| try { |
| byte[] macKey = genDigest("mac", passwd); |
| SecretKeySpec keySpec = new SecretKeySpec(macKey, KEY_ALGORITHM); |
| Mac mac = Mac.getInstance(KEY_ALGORITHM); |
| mac.init(keySpec); |
| return mac; |
| } catch (GeneralSecurityException gse) { |
| LOG.error("Couldn't not get mac instance", gse); |
| return null; |
| } |
| } |
| }; |
| |
| public MacDigestManager(long ledgerId, byte[] passwd, boolean useV2Protocol, ByteBufAllocator allocator) |
| throws GeneralSecurityException { |
| super(ledgerId, useV2Protocol, allocator); |
| this.passwd = Arrays.copyOf(passwd, passwd.length); |
| } |
| |
| public static byte[] genDigest(String pad, byte[] passwd) throws NoSuchAlgorithmException { |
| MessageDigest digest = MessageDigest.getInstance(DIGEST_ALGORITHM); |
| digest.update(pad.getBytes(UTF_8)); |
| digest.update(passwd); |
| return digest.digest(); |
| } |
| |
| @Override |
| int getMacCodeLength() { |
| return MAC_CODE_LENGTH; |
| } |
| |
| |
| @Override |
| void populateValueAndReset(ByteBuf buffer) { |
| buffer.writeBytes(mac.get().doFinal()); |
| } |
| |
| @Override |
| void update(ByteBuf data) { |
| mac.get().update(data.nioBuffer()); |
| } |
| |
| |
| } |